TY  - JOUR
AU  - Novović, Katarina
AU  - Kuzmanović Nedeljković, Snežana
AU  - Poledica, Mirjana
AU  - Nikolić, Gordana
AU  - Grujić, Bojana
AU  - Jovčić, Branko
AU  - Kojić, Milan
AU  - Filipić, Brankica
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4471
AB  - Since the WHO declared the COVID-19 pandemic in March 2020, the disease has spread rapidly leading to overload of the health system and many of the patients infected with SARS-CoV-2 needed to be admitted to the intensive care unit (ICU). Around 10% of patients with the severe manifestation of COVID-19 need noninvasive or invasive mechanical ventilation, which represent a risk factor for Acinetobacter baumannii superinfection. The 64 A. baumannii isolates were recovered from COVID-19 patients admitted to ICU at General Hospital “Dr Laza K. Lazarević” Šabac, Serbia, during the period from December 2020 to February 2021. All patients required mechanical ventilation and mortality rate was 100%. The goal of this study was to evaluate antibiotic resistance profiles and virulence potential of A. baumannii isolates recovered from patients with severe form of COVID-19 who had a need for mechanical ventilation. All tested A. baumannii isolates (n = 64) were sensitive to colistin, while resistant to meropenem, imipenem, gentamicin, tobramycin, and levofloxacin according to the broth microdilution method and MDR phenotype was confirmed. In all tested isolates, representatives of international clone 2 (IC2) classified by multiplex PCR for clonal lineage identification, blaAmpC, blaOXA-51, and blaOXA-23 genes were present, as well as ISAba1 insertion sequence upstream of blaOXA-23. Clonal distribution of one dominant strain was found, but individual strains showed phenotypic differences in the level of antibiotic resistance, biofilm formation, and binding to mucin and motility. According to PFGE, four isolates were sequenced and antibiotic resistance genes as well as virulence factors genes were analyzed in these genomes. The results of this study represent the first report on virulence potential of MDR A. baumannii from hospital in Serbia.
PB  - Frontiers Media S.A.
T2  - Frontiers in Microbiology
T1  - Virulence potential of multidrug-resistant Acinetobacter baumannii isolates from COVID-19 patients on mechanical ventilation: The first report from Serbia
VL  - 14
DO  - 10.3389/fmicb.2023.1094184
ER  - 

@article{
author = "Novović, Katarina and Kuzmanović Nedeljković, Snežana and Poledica, Mirjana and Nikolić, Gordana and Grujić, Bojana and Jovčić, Branko and Kojić, Milan and Filipić, Brankica",
year = "2023",
abstract = "Since the WHO declared the COVID-19 pandemic in March 2020, the disease has spread rapidly leading to overload of the health system and many of the patients infected with SARS-CoV-2 needed to be admitted to the intensive care unit (ICU). Around 10% of patients with the severe manifestation of COVID-19 need noninvasive or invasive mechanical ventilation, which represent a risk factor for Acinetobacter baumannii superinfection. The 64 A. baumannii isolates were recovered from COVID-19 patients admitted to ICU at General Hospital “Dr Laza K. Lazarević” Šabac, Serbia, during the period from December 2020 to February 2021. All patients required mechanical ventilation and mortality rate was 100%. The goal of this study was to evaluate antibiotic resistance profiles and virulence potential of A. baumannii isolates recovered from patients with severe form of COVID-19 who had a need for mechanical ventilation. All tested A. baumannii isolates (n = 64) were sensitive to colistin, while resistant to meropenem, imipenem, gentamicin, tobramycin, and levofloxacin according to the broth microdilution method and MDR phenotype was confirmed. In all tested isolates, representatives of international clone 2 (IC2) classified by multiplex PCR for clonal lineage identification, blaAmpC, blaOXA-51, and blaOXA-23 genes were present, as well as ISAba1 insertion sequence upstream of blaOXA-23. Clonal distribution of one dominant strain was found, but individual strains showed phenotypic differences in the level of antibiotic resistance, biofilm formation, and binding to mucin and motility. According to PFGE, four isolates were sequenced and antibiotic resistance genes as well as virulence factors genes were analyzed in these genomes. The results of this study represent the first report on virulence potential of MDR A. baumannii from hospital in Serbia.",
publisher = "Frontiers Media S.A.",
journal = "Frontiers in Microbiology",
title = "Virulence potential of multidrug-resistant Acinetobacter baumannii isolates from COVID-19 patients on mechanical ventilation: The first report from Serbia",
volume = "14",
doi = "10.3389/fmicb.2023.1094184"
}

Novović, K., Kuzmanović Nedeljković, S., Poledica, M., Nikolić, G., Grujić, B., Jovčić, B., Kojić, M.,& Filipić, B.. (2023). Virulence potential of multidrug-resistant Acinetobacter baumannii isolates from COVID-19 patients on mechanical ventilation: The first report from Serbia. in Frontiers in Microbiology
Frontiers Media S.A.., 14.
https://doi.org/10.3389/fmicb.2023.1094184

Novović K, Kuzmanović Nedeljković S, Poledica M, Nikolić G, Grujić B, Jovčić B, Kojić M, Filipić B. Virulence potential of multidrug-resistant Acinetobacter baumannii isolates from COVID-19 patients on mechanical ventilation: The first report from Serbia. in Frontiers in Microbiology. 2023;14.
doi:10.3389/fmicb.2023.1094184 .

Novović, Katarina, Kuzmanović Nedeljković, Snežana, Poledica, Mirjana, Nikolić, Gordana, Grujić, Bojana, Jovčić, Branko, Kojić, Milan, Filipić, Brankica, "Virulence potential of multidrug-resistant Acinetobacter baumannii isolates from COVID-19 patients on mechanical ventilation: The first report from Serbia" in Frontiers in Microbiology, 14 (2023),
https://doi.org/10.3389/fmicb.2023.1094184 . .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Malešević, Milka
AU  - Vasiljević, Zorica
AU  - Novović, Katarina
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4370
AB  - Trimethoprim-sulfamethoxazole (SXT) is the preferable treatment option of the infections caused by Achromobacter spp. Our study aimed to analyze the SXT resistance of 98 Achromobacter spp. isolates from pediatric patients, among which 33 isolates were SXT-resistant. The presence of intI1 was screened by PCR and genome sequence analyses. The intI1 gene was detected in 10 of SXT-resistant isolates that had shorter intI1 PCR fragments named intI1S. Structural changes in intI1S were confirmed by genome sequencing and analyses which revealed 86 amino acids deletion in IntI1S protein compared to canonical IntI1 protein. All IntI1S isolates were of non-CF origin. Pan-genome analysis of intI1S bearing A. xylosoxidans isolates comprised 9052 genes, with the core genome consisting of 5455 protein-coding genes. Results in this study indicate that IntI1S isolates were derived from clinical settings and that cystic fibrosis (CF) patients were potential reservoirs for healthcare-associated infections that occurred in non-CF patients.
PB  - Springer Science and Business Media B.V.
T2  - Folia Microbiologica
T1  - Comparative genomics of trimethoprim-sulfamethoxazole-resistant Achromobacter xylosoxidans clinical isolates from Serbia reveals shortened variant of class 1 integron integrase gene
VL  - n/d
DO  - 10.1007/s12223-022-01026-8
ER  - 

@article{
author = "Filipić, Brankica and Malešević, Milka and Vasiljević, Zorica and Novović, Katarina and Kojić, Milan and Jovčić, Branko",
year = "2022",
abstract = "Trimethoprim-sulfamethoxazole (SXT) is the preferable treatment option of the infections caused by Achromobacter spp. Our study aimed to analyze the SXT resistance of 98 Achromobacter spp. isolates from pediatric patients, among which 33 isolates were SXT-resistant. The presence of intI1 was screened by PCR and genome sequence analyses. The intI1 gene was detected in 10 of SXT-resistant isolates that had shorter intI1 PCR fragments named intI1S. Structural changes in intI1S were confirmed by genome sequencing and analyses which revealed 86 amino acids deletion in IntI1S protein compared to canonical IntI1 protein. All IntI1S isolates were of non-CF origin. Pan-genome analysis of intI1S bearing A. xylosoxidans isolates comprised 9052 genes, with the core genome consisting of 5455 protein-coding genes. Results in this study indicate that IntI1S isolates were derived from clinical settings and that cystic fibrosis (CF) patients were potential reservoirs for healthcare-associated infections that occurred in non-CF patients.",
publisher = "Springer Science and Business Media B.V.",
journal = "Folia Microbiologica",
title = "Comparative genomics of trimethoprim-sulfamethoxazole-resistant Achromobacter xylosoxidans clinical isolates from Serbia reveals shortened variant of class 1 integron integrase gene",
volume = "n/d",
doi = "10.1007/s12223-022-01026-8"
}

Filipić, B., Malešević, M., Vasiljević, Z., Novović, K., Kojić, M.,& Jovčić, B.. (2022). Comparative genomics of trimethoprim-sulfamethoxazole-resistant Achromobacter xylosoxidans clinical isolates from Serbia reveals shortened variant of class 1 integron integrase gene. in Folia Microbiologica
Springer Science and Business Media B.V.., n/d.
https://doi.org/10.1007/s12223-022-01026-8

Filipić B, Malešević M, Vasiljević Z, Novović K, Kojić M, Jovčić B. Comparative genomics of trimethoprim-sulfamethoxazole-resistant Achromobacter xylosoxidans clinical isolates from Serbia reveals shortened variant of class 1 integron integrase gene. in Folia Microbiologica. 2022;n/d.
doi:10.1007/s12223-022-01026-8 .

Filipić, Brankica, Malešević, Milka, Vasiljević, Zorica, Novović, Katarina, Kojić, Milan, Jovčić, Branko, "Comparative genomics of trimethoprim-sulfamethoxazole-resistant Achromobacter xylosoxidans clinical isolates from Serbia reveals shortened variant of class 1 integron integrase gene" in Folia Microbiologica, n/d (2022),
https://doi.org/10.1007/s12223-022-01026-8 . .

TY  - CONF
AU  - Kabić, Jovana
AU  - Luković, Bojana
AU  - Jovčić, Branko
AU  - Filipić, Brankica
AU  - Kekić, Dušan
AU  - Jovičević, Miloš
AU  - Ranin, Lazar
AU  - Opavski, Nataša
AU  - Dimkić, Ivica
AU  - Gajić, Ina
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5139
PB  - ESCMID
C3  - 32nd European Congress of Clinical Microbiology and Infectious Diseases, 23-26 April 2022 Lisabon - Final Programme
T1  - A core genome multilocus sequence typing of Acinetobacter baumannii isolated from pre-COVID-19 and COVID-19 period
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5139
ER  - 

@conference{
author = "Kabić, Jovana and Luković, Bojana and Jovčić, Branko and Filipić, Brankica and Kekić, Dušan and Jovičević, Miloš and Ranin, Lazar and Opavski, Nataša and Dimkić, Ivica and Gajić, Ina",
year = "2022",
publisher = "ESCMID",
journal = "32nd European Congress of Clinical Microbiology and Infectious Diseases, 23-26 April 2022 Lisabon - Final Programme",
title = "A core genome multilocus sequence typing of Acinetobacter baumannii isolated from pre-COVID-19 and COVID-19 period",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5139"
}

Kabić, J., Luković, B., Jovčić, B., Filipić, B., Kekić, D., Jovičević, M., Ranin, L., Opavski, N., Dimkić, I.,& Gajić, I.. (2022). A core genome multilocus sequence typing of Acinetobacter baumannii isolated from pre-COVID-19 and COVID-19 period. in 32nd European Congress of Clinical Microbiology and Infectious Diseases, 23-26 April 2022 Lisabon - Final Programme
ESCMID..
https://hdl.handle.net/21.15107/rcub_farfar_5139

Kabić J, Luković B, Jovčić B, Filipić B, Kekić D, Jovičević M, Ranin L, Opavski N, Dimkić I, Gajić I. A core genome multilocus sequence typing of Acinetobacter baumannii isolated from pre-COVID-19 and COVID-19 period. in 32nd European Congress of Clinical Microbiology and Infectious Diseases, 23-26 April 2022 Lisabon - Final Programme. 2022;.
https://hdl.handle.net/21.15107/rcub_farfar_5139 .

Kabić, Jovana, Luković, Bojana, Jovčić, Branko, Filipić, Brankica, Kekić, Dušan, Jovičević, Miloš, Ranin, Lazar, Opavski, Nataša, Dimkić, Ivica, Gajić, Ina, "A core genome multilocus sequence typing of Acinetobacter baumannii isolated from pre-COVID-19 and COVID-19 period" in 32nd European Congress of Clinical Microbiology and Infectious Diseases, 23-26 April 2022 Lisabon - Final Programme (2022),
https://hdl.handle.net/21.15107/rcub_farfar_5139 .

TY  - CONF
AU  - Filipić, Brankica
AU  - Novović, Katarina
AU  - Kuzmanović Nedeljković, Snežana
AU  - Jovčić, Branko
AU  - Kojić, Milan
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5118
AB  - BACKGROUND
From the start of COVID-19 pandemic, many patients suffering severe clinical presentation of COVID-19 and 
acute respiratory failure have been administered to intensive care units (ICUs). Need for noninvasive or invasive 
mechanical ventilation represents a high-risk factor for these patients to develop Acinetobacter baumannii 
superinfection.
OBJECTIVES
The main goal of this study was to examine virulence potential of A. baumannii isolates recovered from 
COVID-19 patients admitted to ICU as well as to compare differences in virulence among isolates originated 
from male and female patients or from different sample types.
METHODS
64 A. baumannii isolates were recovered from COVID-19 patients from December 2020 to February 2021. 
The isolates were originated from different sample types: blood, tip of the central venous catheter, tracheal 
aspirate, tip of the aspirator and sputum. Genetic relatedness of ApaI digested A. baumannii isolates, 
was determined by pulsed-field gel electrophoresis (PFGE). Affinity to mucin binding was tested using in vitro 
model and isolates were examined for two types of motilities: swarming and twitching.
PB  - Federation of European Microbiological Societies
PB  - Serbian Society for Microbiology
C3  - FEMS Conference on Microbiology in association with Serbian Society of Microbiology, 30 June - 2 July 2022, Serbia - electronic abstract book
T1  - Assesing virulence potential of Acinetobacter baumannii isolates recovered from COVID-19 patients
SP  - 96
EP  - 96
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5118
ER  - 

@conference{
author = "Filipić, Brankica and Novović, Katarina and Kuzmanović Nedeljković, Snežana and Jovčić, Branko and Kojić, Milan",
year = "2022",
abstract = "BACKGROUND
From the start of COVID-19 pandemic, many patients suffering severe clinical presentation of COVID-19 and 
acute respiratory failure have been administered to intensive care units (ICUs). Need for noninvasive or invasive 
mechanical ventilation represents a high-risk factor for these patients to develop Acinetobacter baumannii 
superinfection.
OBJECTIVES
The main goal of this study was to examine virulence potential of A. baumannii isolates recovered from 
COVID-19 patients admitted to ICU as well as to compare differences in virulence among isolates originated 
from male and female patients or from different sample types.
METHODS
64 A. baumannii isolates were recovered from COVID-19 patients from December 2020 to February 2021. 
The isolates were originated from different sample types: blood, tip of the central venous catheter, tracheal 
aspirate, tip of the aspirator and sputum. Genetic relatedness of ApaI digested A. baumannii isolates, 
was determined by pulsed-field gel electrophoresis (PFGE). Affinity to mucin binding was tested using in vitro 
model and isolates were examined for two types of motilities: swarming and twitching.",
publisher = "Federation of European Microbiological Societies, Serbian Society for Microbiology",
journal = "FEMS Conference on Microbiology in association with Serbian Society of Microbiology, 30 June - 2 July 2022, Serbia - electronic abstract book",
title = "Assesing virulence potential of Acinetobacter baumannii isolates recovered from COVID-19 patients",
pages = "96-96",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5118"
}

Filipić, B., Novović, K., Kuzmanović Nedeljković, S., Jovčić, B.,& Kojić, M.. (2022). Assesing virulence potential of Acinetobacter baumannii isolates recovered from COVID-19 patients. in FEMS Conference on Microbiology in association with Serbian Society of Microbiology, 30 June - 2 July 2022, Serbia - electronic abstract book
Federation of European Microbiological Societies., 96-96.
https://hdl.handle.net/21.15107/rcub_farfar_5118

Filipić B, Novović K, Kuzmanović Nedeljković S, Jovčić B, Kojić M. Assesing virulence potential of Acinetobacter baumannii isolates recovered from COVID-19 patients. in FEMS Conference on Microbiology in association with Serbian Society of Microbiology, 30 June - 2 July 2022, Serbia - electronic abstract book. 2022;:96-96.
https://hdl.handle.net/21.15107/rcub_farfar_5118 .

Filipić, Brankica, Novović, Katarina, Kuzmanović Nedeljković, Snežana, Jovčić, Branko, Kojić, Milan, "Assesing virulence potential of Acinetobacter baumannii isolates recovered from COVID-19 patients" in FEMS Conference on Microbiology in association with Serbian Society of Microbiology, 30 June - 2 July 2022, Serbia - electronic abstract book (2022):96-96,
https://hdl.handle.net/21.15107/rcub_farfar_5118 .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Novović, Katarina
AU  - Studholme, David
AU  - Malešević, Milka
AU  - Mirković, Nemanja
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2020
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3631
AB  - Long-term overuse of antibiotics has driven the propagation and spreading of antibiotic resistance genes (ARGs) such as efflux pumps in the environment, which can be transferred to clinically relevant pathogens. This study explored the abundance and diversity of ARGs and mobile genetic elements within bacterial communities from sediments of three Western Balkans glacial lakes: Plav Lake (high impact of human population), Black Lake (medium impact of human population) and Donje Bare Lake (remote lake, minimal impact of human population) via shotgun metagenomics. Assembled metagenomic sequences revealed that Resistance-Nodulation-Division (RND) efflux pumps genes were most abundant in metagenome from the Plav Lake. The Integron Finder bioinformatics tool detected 38 clusters of attC sites lacking integron-integrases (CALIN) elements: 20 from Plav Lake, four from Black Lake and 14 from Donje Bare Lake. A complete integron sequence was recovered only from the assembled metagenome from Plav Lake. Plasmid contents within the metagenomes were similar, with proportions of contigs being plasmid-related: 1.73% for Plav Lake, 1.59% for Black Lake and 1.64% for Donje Bare Lake. The investigation showed that RNDs and mobile genetic elements content correlated with human population impact.
PB  - NLM (Medline)
T2  - Journal of water and health
T1  - Shotgun metagenomics reveals differences in antibiotic resistance genes among bacterial communities in Western Balkans glacial lakes sediments
VL  - 18
IS  - 3
SP  - 383
EP  - 397
DO  - 10.2166/wh.2020.227
ER  - 

@article{
author = "Filipić, Brankica and Novović, Katarina and Studholme, David and Malešević, Milka and Mirković, Nemanja and Kojić, Milan and Jovčić, Branko",
year = "2020",
abstract = "Long-term overuse of antibiotics has driven the propagation and spreading of antibiotic resistance genes (ARGs) such as efflux pumps in the environment, which can be transferred to clinically relevant pathogens. This study explored the abundance and diversity of ARGs and mobile genetic elements within bacterial communities from sediments of three Western Balkans glacial lakes: Plav Lake (high impact of human population), Black Lake (medium impact of human population) and Donje Bare Lake (remote lake, minimal impact of human population) via shotgun metagenomics. Assembled metagenomic sequences revealed that Resistance-Nodulation-Division (RND) efflux pumps genes were most abundant in metagenome from the Plav Lake. The Integron Finder bioinformatics tool detected 38 clusters of attC sites lacking integron-integrases (CALIN) elements: 20 from Plav Lake, four from Black Lake and 14 from Donje Bare Lake. A complete integron sequence was recovered only from the assembled metagenome from Plav Lake. Plasmid contents within the metagenomes were similar, with proportions of contigs being plasmid-related: 1.73% for Plav Lake, 1.59% for Black Lake and 1.64% for Donje Bare Lake. The investigation showed that RNDs and mobile genetic elements content correlated with human population impact.",
publisher = "NLM (Medline)",
journal = "Journal of water and health",
title = "Shotgun metagenomics reveals differences in antibiotic resistance genes among bacterial communities in Western Balkans glacial lakes sediments",
volume = "18",
number = "3",
pages = "383-397",
doi = "10.2166/wh.2020.227"
}

Filipić, B., Novović, K., Studholme, D., Malešević, M., Mirković, N., Kojić, M.,& Jovčić, B.. (2020). Shotgun metagenomics reveals differences in antibiotic resistance genes among bacterial communities in Western Balkans glacial lakes sediments. in Journal of water and health
NLM (Medline)., 18(3), 383-397.
https://doi.org/10.2166/wh.2020.227

Filipić B, Novović K, Studholme D, Malešević M, Mirković N, Kojić M, Jovčić B. Shotgun metagenomics reveals differences in antibiotic resistance genes among bacterial communities in Western Balkans glacial lakes sediments. in Journal of water and health. 2020;18(3):383-397.
doi:10.2166/wh.2020.227 .

Filipić, Brankica, Novović, Katarina, Studholme, David, Malešević, Milka, Mirković, Nemanja, Kojić, Milan, Jovčić, Branko, "Shotgun metagenomics reveals differences in antibiotic resistance genes among bacterial communities in Western Balkans glacial lakes sediments" in Journal of water and health, 18, no. 3 (2020):383-397,
https://doi.org/10.2166/wh.2020.227 . .

TY  - JOUR
AU  - Miljković, Marija
AU  - Jovanović, Sofija
AU  - O'Connor, Paula M.
AU  - Mirković, Nemanja
AU  - Jovčić, Branko
AU  - Filipić, Brankica
AU  - Dinić, Miroslav
AU  - Studholme, David John
AU  - Fira, Đorđe
AU  - Cotter, Paul D.
AU  - Kojić, Milan
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3372
AB  - Bacteria active against multi-drug resistant pathogens, isolated by direct selection of colonies from clover silage samples, produce zones of inhibition against two Gram-negative (Klebsiella pneumoniae Ni9 and Pseudomonas aeruginosa MMA83) and two Gram-positive (Staphylococcus aureus ATCC25923 and Listeria monocytogenes ATCC19111) pathogens. Isolates BGSP7, BGSP9, BGSP11 and BGSP12 produced the largest zones of inhibition against all four pathogens when grown in LB broth with aeration at 37 degrees C. Isolates BGSP7, BGSP9, BGSP11 and BGSP12 were identified as Brevibacillus laterosporus and pulsed field gel electrophoresis and extracellular protein profiles showed that three different strains (BGSP7, BGSP9 and BGSP11) were isolated. A semi-native SDS-PAGE (sodium dodecyl sulphate-polyacrylamide gel electrophoresis) gel overlay assay showed that BGSP7 and BGSP9 produce small antimicrobial molecules of about 1.5 kDa, while BGSP11 produces antimicrobial molecules of 1.5 and 6 kDa active against S. aureus ATCC25923. Amino acid analysis of two antimicrobial molecules (1583.73 Da; from BGSP7 and 1556.31 Da; from BGSP11) revealed that they have a similar composition and differ only by virtue of the presence of a methionine which is present only in BGSP11 molecule. Genome sequencing of the three isolates revealed the presence of gene clusters associated with the production of non-ribosomally synthesized peptides (brevibacillin, bogorol, gramicidin S, plipastatin and tyrocin) and bacteriocins (laterosporulin, a lactococcin 972-like bacteriocin, as well as putative linocin M18, sactipeptide, UviB and lantipeptide-like molecules). Ultimately, the purification of a number of antimicrobial molecules from each isolate suggests that they can be considered as potent biocontrol strains that produce an arsenal of antimicrobial molecules active against Gram-positive and Gram-negative multi-resistant pathogens, fungi and insects.
PB  - Public Library Science, San Francisco
T2  - PLoS One
T1  - Brevibacillus laterosporus strains BGSP7, BGSP9 and BGSP11 isolated from silage produce broad spectrum multi-antimicrobials
VL  - 14
IS  - 5
DO  - 10.1371/journal.pone.0216773
ER  - 

@article{
author = "Miljković, Marija and Jovanović, Sofija and O'Connor, Paula M. and Mirković, Nemanja and Jovčić, Branko and Filipić, Brankica and Dinić, Miroslav and Studholme, David John and Fira, Đorđe and Cotter, Paul D. and Kojić, Milan",
year = "2019",
abstract = "Bacteria active against multi-drug resistant pathogens, isolated by direct selection of colonies from clover silage samples, produce zones of inhibition against two Gram-negative (Klebsiella pneumoniae Ni9 and Pseudomonas aeruginosa MMA83) and two Gram-positive (Staphylococcus aureus ATCC25923 and Listeria monocytogenes ATCC19111) pathogens. Isolates BGSP7, BGSP9, BGSP11 and BGSP12 produced the largest zones of inhibition against all four pathogens when grown in LB broth with aeration at 37 degrees C. Isolates BGSP7, BGSP9, BGSP11 and BGSP12 were identified as Brevibacillus laterosporus and pulsed field gel electrophoresis and extracellular protein profiles showed that three different strains (BGSP7, BGSP9 and BGSP11) were isolated. A semi-native SDS-PAGE (sodium dodecyl sulphate-polyacrylamide gel electrophoresis) gel overlay assay showed that BGSP7 and BGSP9 produce small antimicrobial molecules of about 1.5 kDa, while BGSP11 produces antimicrobial molecules of 1.5 and 6 kDa active against S. aureus ATCC25923. Amino acid analysis of two antimicrobial molecules (1583.73 Da; from BGSP7 and 1556.31 Da; from BGSP11) revealed that they have a similar composition and differ only by virtue of the presence of a methionine which is present only in BGSP11 molecule. Genome sequencing of the three isolates revealed the presence of gene clusters associated with the production of non-ribosomally synthesized peptides (brevibacillin, bogorol, gramicidin S, plipastatin and tyrocin) and bacteriocins (laterosporulin, a lactococcin 972-like bacteriocin, as well as putative linocin M18, sactipeptide, UviB and lantipeptide-like molecules). Ultimately, the purification of a number of antimicrobial molecules from each isolate suggests that they can be considered as potent biocontrol strains that produce an arsenal of antimicrobial molecules active against Gram-positive and Gram-negative multi-resistant pathogens, fungi and insects.",
publisher = "Public Library Science, San Francisco",
journal = "PLoS One",
title = "Brevibacillus laterosporus strains BGSP7, BGSP9 and BGSP11 isolated from silage produce broad spectrum multi-antimicrobials",
volume = "14",
number = "5",
doi = "10.1371/journal.pone.0216773"
}

Miljković, M., Jovanović, S., O'Connor, P. M., Mirković, N., Jovčić, B., Filipić, B., Dinić, M., Studholme, D. J., Fira, Đ., Cotter, P. D.,& Kojić, M.. (2019). Brevibacillus laterosporus strains BGSP7, BGSP9 and BGSP11 isolated from silage produce broad spectrum multi-antimicrobials. in PLoS One
Public Library Science, San Francisco., 14(5).
https://doi.org/10.1371/journal.pone.0216773

Miljković M, Jovanović S, O'Connor PM, Mirković N, Jovčić B, Filipić B, Dinić M, Studholme DJ, Fira Đ, Cotter PD, Kojić M. Brevibacillus laterosporus strains BGSP7, BGSP9 and BGSP11 isolated from silage produce broad spectrum multi-antimicrobials. in PLoS One. 2019;14(5).
doi:10.1371/journal.pone.0216773 .

Miljković, Marija, Jovanović, Sofija, O'Connor, Paula M., Mirković, Nemanja, Jovčić, Branko, Filipić, Brankica, Dinić, Miroslav, Studholme, David John, Fira, Đorđe, Cotter, Paul D., Kojić, Milan, "Brevibacillus laterosporus strains BGSP7, BGSP9 and BGSP11 isolated from silage produce broad spectrum multi-antimicrobials" in PLoS One, 14, no. 5 (2019),
https://doi.org/10.1371/journal.pone.0216773 . .

TY  - JOUR
AU  - Novović, Katarina
AU  - Malesević, Milka
AU  - Filipić, Brankica
AU  - Mirković, Nemanja
AU  - Miljković, Marija
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3313
AB  - Pseudomonas aeruginosa, which is a clinically important representative of Pseudomonas spp., has been recognized as causative agent of severe nosocomial infections worldwide. An increase in antibiotic resistance of P. aeruginosa clinical strains could be attributed to their capacity to acquire resistance through mobile genetic elements such as mobile integrons that are present in one-half of multidrug-resistant P. aeruginosa strains. Mobile class 1 integrons are recognized as genetic elements involved in the rapid dissemination of multiple genes encoding for antibiotic resistance. The LexA protein is a major repressor of integrase transcription, but differences in transcription regulation among bacterial species have also been noted. In this study, the promoter activity of class 1 integron integrase gene (intI1) and its variant lacking the LexA binding site in Pseudomonas putida WCS358 wild type, rpoS and psrA was analysed. The results show that the activity of the intI1 gene promoter decreased in the rpoS and psrA mutants in the stationary phase of growth compared to the wild type, which indicates the role of RpoS and PsrA proteins in the positive regulation of integrase transcription. Additionally, it was determined that the activity of the lexA gene promoter decreased in rpoS and psrA, and thus, we propose that PsrA indirectly regulates the intI1 gene promoter activity through regulation of lexA gene expression in co-operation with some additional regulators. In this study, intI1 gene expression was shown to be controlled by two major stress response (SOS and RpoS) regulons, which indicates that integrase has evolved to use both systems to sense the cell status.
PB  - Springer, New York
T2  - Current Microbiology
T1  - PsrA Regulator Connects Cell Physiology and Class 1 Integron Integrase Gene Expression Through the Regulation of lexA Gene Expression in Pseudomonas spp.
VL  - 76
IS  - 3
SP  - 320
EP  - 328
DO  - 10.1007/s00284-019-01626-7
ER  - 

@article{
author = "Novović, Katarina and Malesević, Milka and Filipić, Brankica and Mirković, Nemanja and Miljković, Marija and Kojić, Milan and Jovčić, Branko",
year = "2019",
abstract = "Pseudomonas aeruginosa, which is a clinically important representative of Pseudomonas spp., has been recognized as causative agent of severe nosocomial infections worldwide. An increase in antibiotic resistance of P. aeruginosa clinical strains could be attributed to their capacity to acquire resistance through mobile genetic elements such as mobile integrons that are present in one-half of multidrug-resistant P. aeruginosa strains. Mobile class 1 integrons are recognized as genetic elements involved in the rapid dissemination of multiple genes encoding for antibiotic resistance. The LexA protein is a major repressor of integrase transcription, but differences in transcription regulation among bacterial species have also been noted. In this study, the promoter activity of class 1 integron integrase gene (intI1) and its variant lacking the LexA binding site in Pseudomonas putida WCS358 wild type, rpoS and psrA was analysed. The results show that the activity of the intI1 gene promoter decreased in the rpoS and psrA mutants in the stationary phase of growth compared to the wild type, which indicates the role of RpoS and PsrA proteins in the positive regulation of integrase transcription. Additionally, it was determined that the activity of the lexA gene promoter decreased in rpoS and psrA, and thus, we propose that PsrA indirectly regulates the intI1 gene promoter activity through regulation of lexA gene expression in co-operation with some additional regulators. In this study, intI1 gene expression was shown to be controlled by two major stress response (SOS and RpoS) regulons, which indicates that integrase has evolved to use both systems to sense the cell status.",
publisher = "Springer, New York",
journal = "Current Microbiology",
title = "PsrA Regulator Connects Cell Physiology and Class 1 Integron Integrase Gene Expression Through the Regulation of lexA Gene Expression in Pseudomonas spp.",
volume = "76",
number = "3",
pages = "320-328",
doi = "10.1007/s00284-019-01626-7"
}

Novović, K., Malesević, M., Filipić, B., Mirković, N., Miljković, M., Kojić, M.,& Jovčić, B.. (2019). PsrA Regulator Connects Cell Physiology and Class 1 Integron Integrase Gene Expression Through the Regulation of lexA Gene Expression in Pseudomonas spp.. in Current Microbiology
Springer, New York., 76(3), 320-328.
https://doi.org/10.1007/s00284-019-01626-7

Novović K, Malesević M, Filipić B, Mirković N, Miljković M, Kojić M, Jovčić B. PsrA Regulator Connects Cell Physiology and Class 1 Integron Integrase Gene Expression Through the Regulation of lexA Gene Expression in Pseudomonas spp.. in Current Microbiology. 2019;76(3):320-328.
doi:10.1007/s00284-019-01626-7 .

Novović, Katarina, Malesević, Milka, Filipić, Brankica, Mirković, Nemanja, Miljković, Marija, Kojić, Milan, Jovčić, Branko, "PsrA Regulator Connects Cell Physiology and Class 1 Integron Integrase Gene Expression Through the Regulation of lexA Gene Expression in Pseudomonas spp." in Current Microbiology, 76, no. 3 (2019):320-328,
https://doi.org/10.1007/s00284-019-01626-7 . .

TY  - JOUR
AU  - Malešević, Milka
AU  - Di Lorenzo, Flaviana
AU  - Filipić, Brankica
AU  - Stanisavljević, Nemanja
AU  - Novović, Katarina
AU  - Senerovic, Lidija
AU  - Polović, Natalija
AU  - Molinaro, Antonio
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3538
AB  - Pseudomonas aeruginosa is one of the most common opportunistic pathogens that use quorum sensing (QS) system to regulate virulence factors expression and biofilm development. Delftia sp. 11304 was selected among 663 Gram-negative clinical isolates based on its QS inhibitory activity against P. aeruginosa MMA83 clinical isolate. Whole genome sequencing identified this isolate as D. tsuruhatensis and revealed genetic armamentarium of virulence factors and antibiotic resistance determinants. Ethyl acetate extract of D. tsuruhatensis 11304 culture supernatant (QSI extract) prevented biofilm formation of P. aeruginosa MMA83, but was unable to cause biofilm decomposition. QSI extract showed a synergistic effect in combination with meropenem and gentamycin, against P. aeruginosa MMA83. A dose-dependent reduction of the virulence factors: elastase, rhamnolipid and pyocyanin production by P. aeruginosa MMA83 and significant downregulation of lasI, lasR, rhlI, rhlR, pqs and mvfR expression were observed. Matrix-assisted Laser Desorption Ionization (MALDI) mass spectrometry of D. tsuruhatensis 11304 QSI extract revealed the presence of N-acyl homoserine lactones (AHL) with chain lengths of C12 to C18. The main ion peak was identified as N-octadecanoylhomoserine lactone (C18-HSL). Commercial C18-HSL (20 µM) reduced pyocyanin production as well as mRNA level of the lasI gene. A novel AHL species, dihydroxy-N-octadecanoylhomoserine lactone, was also described.
PB  - NatureResearch
T2  - Scientific Reports
T1  - Pseudomonas aeruginosa quorum sensing inhibition by clinical isolate Delftia tsuruhatensis 11304: involvement of N-octadecanoylhomoserine lactones
VL  - 9
IS  - 1
DO  - 10.1038/s41598-019-52955-3
ER  - 

@article{
author = "Malešević, Milka and Di Lorenzo, Flaviana and Filipić, Brankica and Stanisavljević, Nemanja and Novović, Katarina and Senerovic, Lidija and Polović, Natalija and Molinaro, Antonio and Kojić, Milan and Jovčić, Branko",
year = "2019",
abstract = "Pseudomonas aeruginosa is one of the most common opportunistic pathogens that use quorum sensing (QS) system to regulate virulence factors expression and biofilm development. Delftia sp. 11304 was selected among 663 Gram-negative clinical isolates based on its QS inhibitory activity against P. aeruginosa MMA83 clinical isolate. Whole genome sequencing identified this isolate as D. tsuruhatensis and revealed genetic armamentarium of virulence factors and antibiotic resistance determinants. Ethyl acetate extract of D. tsuruhatensis 11304 culture supernatant (QSI extract) prevented biofilm formation of P. aeruginosa MMA83, but was unable to cause biofilm decomposition. QSI extract showed a synergistic effect in combination with meropenem and gentamycin, against P. aeruginosa MMA83. A dose-dependent reduction of the virulence factors: elastase, rhamnolipid and pyocyanin production by P. aeruginosa MMA83 and significant downregulation of lasI, lasR, rhlI, rhlR, pqs and mvfR expression were observed. Matrix-assisted Laser Desorption Ionization (MALDI) mass spectrometry of D. tsuruhatensis 11304 QSI extract revealed the presence of N-acyl homoserine lactones (AHL) with chain lengths of C12 to C18. The main ion peak was identified as N-octadecanoylhomoserine lactone (C18-HSL). Commercial C18-HSL (20 µM) reduced pyocyanin production as well as mRNA level of the lasI gene. A novel AHL species, dihydroxy-N-octadecanoylhomoserine lactone, was also described.",
publisher = "NatureResearch",
journal = "Scientific Reports",
title = "Pseudomonas aeruginosa quorum sensing inhibition by clinical isolate Delftia tsuruhatensis 11304: involvement of N-octadecanoylhomoserine lactones",
volume = "9",
number = "1",
doi = "10.1038/s41598-019-52955-3"
}

Malešević, M., Di Lorenzo, F., Filipić, B., Stanisavljević, N., Novović, K., Senerovic, L., Polović, N., Molinaro, A., Kojić, M.,& Jovčić, B.. (2019). Pseudomonas aeruginosa quorum sensing inhibition by clinical isolate Delftia tsuruhatensis 11304: involvement of N-octadecanoylhomoserine lactones. in Scientific Reports
NatureResearch., 9(1).
https://doi.org/10.1038/s41598-019-52955-3

Malešević M, Di Lorenzo F, Filipić B, Stanisavljević N, Novović K, Senerovic L, Polović N, Molinaro A, Kojić M, Jovčić B. Pseudomonas aeruginosa quorum sensing inhibition by clinical isolate Delftia tsuruhatensis 11304: involvement of N-octadecanoylhomoserine lactones. in Scientific Reports. 2019;9(1).
doi:10.1038/s41598-019-52955-3 .

Malešević, Milka, Di Lorenzo, Flaviana, Filipić, Brankica, Stanisavljević, Nemanja, Novović, Katarina, Senerovic, Lidija, Polović, Natalija, Molinaro, Antonio, Kojić, Milan, Jovčić, Branko, "Pseudomonas aeruginosa quorum sensing inhibition by clinical isolate Delftia tsuruhatensis 11304: involvement of N-octadecanoylhomoserine lactones" in Scientific Reports, 9, no. 1 (2019),
https://doi.org/10.1038/s41598-019-52955-3 . .

TY  - JOUR
AU  - Malesević, Milka
AU  - Mirković, Nemanja
AU  - Lozo, Jelena
AU  - Novović, Katarina
AU  - Filipić, Brankica
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3333
AB  - 16S rRNA gene-based metagenomic approach was used to assess the biodiversity of bacterial communities in the sediments of selected glacial lakes in the Western Balkans and to assess the impact of human population on these microbial communities. Sediment samples were collected from three glacial lakes, viz., Plav Lake (in a zone of the highest impact of human population), Black Lake (a zone of medium impact of human population), and Donje Bare Lake (a remote lake with minimal impact of human population). Canonical correlation analysis analysis indicated correlation between the distance of the lake from urbanized population and bacterial diversity in Donje Bare Lake sediment. Bacterial diversity of Black Lake sediment was correlated with high content of phosphorous and pH value. Chemical compounds exhibiting the most prominent correlation with bacterial diversity of Plav Lake were NH4-N, K2O, CaCo3, and total nitrogen . Additionally, CCA analysis indicated that population density was correlated with biodiversity of bacterial communities in Plav Lake sediment, which is the most exposed to human population. Multivariate regression revealed the highest correlation between the presence of Proteobacteria classes and population density and levels of NH4-N. The influence of human population was observed to be important for shaping the sediment communities in addition to biological and chemical factors.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Geomicrobiology Journal
T1  - Bacterial Diversity among the Sediments of Glacial Lakes in the Western Balkans: Exploring the Impact of Human Population
VL  - 36
IS  - 3
SP  - 261
EP  - 270
DO  - 10.1080/01490451.2018.1550128
ER  - 

@article{
author = "Malesević, Milka and Mirković, Nemanja and Lozo, Jelena and Novović, Katarina and Filipić, Brankica and Kojić, Milan and Jovčić, Branko",
year = "2019",
abstract = "16S rRNA gene-based metagenomic approach was used to assess the biodiversity of bacterial communities in the sediments of selected glacial lakes in the Western Balkans and to assess the impact of human population on these microbial communities. Sediment samples were collected from three glacial lakes, viz., Plav Lake (in a zone of the highest impact of human population), Black Lake (a zone of medium impact of human population), and Donje Bare Lake (a remote lake with minimal impact of human population). Canonical correlation analysis analysis indicated correlation between the distance of the lake from urbanized population and bacterial diversity in Donje Bare Lake sediment. Bacterial diversity of Black Lake sediment was correlated with high content of phosphorous and pH value. Chemical compounds exhibiting the most prominent correlation with bacterial diversity of Plav Lake were NH4-N, K2O, CaCo3, and total nitrogen . Additionally, CCA analysis indicated that population density was correlated with biodiversity of bacterial communities in Plav Lake sediment, which is the most exposed to human population. Multivariate regression revealed the highest correlation between the presence of Proteobacteria classes and population density and levels of NH4-N. The influence of human population was observed to be important for shaping the sediment communities in addition to biological and chemical factors.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Geomicrobiology Journal",
title = "Bacterial Diversity among the Sediments of Glacial Lakes in the Western Balkans: Exploring the Impact of Human Population",
volume = "36",
number = "3",
pages = "261-270",
doi = "10.1080/01490451.2018.1550128"
}

Malesević, M., Mirković, N., Lozo, J., Novović, K., Filipić, B., Kojić, M.,& Jovčić, B.. (2019). Bacterial Diversity among the Sediments of Glacial Lakes in the Western Balkans: Exploring the Impact of Human Population. in Geomicrobiology Journal
Taylor & Francis Inc, Philadelphia., 36(3), 261-270.
https://doi.org/10.1080/01490451.2018.1550128

Malesević M, Mirković N, Lozo J, Novović K, Filipić B, Kojić M, Jovčić B. Bacterial Diversity among the Sediments of Glacial Lakes in the Western Balkans: Exploring the Impact of Human Population. in Geomicrobiology Journal. 2019;36(3):261-270.
doi:10.1080/01490451.2018.1550128 .

Malesević, Milka, Mirković, Nemanja, Lozo, Jelena, Novović, Katarina, Filipić, Brankica, Kojić, Milan, Jovčić, Branko, "Bacterial Diversity among the Sediments of Glacial Lakes in the Western Balkans: Exploring the Impact of Human Population" in Geomicrobiology Journal, 36, no. 3 (2019):261-270,
https://doi.org/10.1080/01490451.2018.1550128 . .

TY  - JOUR
AU  - Lilić, Branislav
AU  - Filipić, Brankica
AU  - Malesević, Milka
AU  - Novović, Katarina
AU  - Vasiljević, Zorica
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3298
AB  - The aim of this study was to evaluate the contribution of plasmid-mediated genes and efflux to fluoroquinolone resistance in collection of Achromobacter spp. gathered during a 3-year period. Susceptibility to ciprofloxacin and levofloxacin was tested by disk diffusion and microdilution tests for a collection of 98 Achromobacter spp. clinical isolates. Identification of fluoroquinolone-resistant isolates was performed by sequencing and phylogenetic analyses of the nrdA gene. Genetic relatedness among resistant isolates was determined by pulsed-field gel electrophoresis (PFGE) analysis. The influence of an H+ conductor cyanide m-chlorophenyl hydrazone (CCCP) and a resistance-nodulation-division-type efflux pump inhibitor phenylalanine-arginine beta-naphthylamide (PAN) on minimal inhibitory concentration (MIC) value was evaluated by broth microdilution. The presence of the plasmid-mediated qnrA, qnrB, qnrC, qnrS, and aac-(6)-Ib-cr genes was investigated by PCR and sequencing. Achromobacter spp. isolates that were resistant or intermediately resistant to fluoroquinolones in disk diffusion tests (44/98) were subjected to microdilution. As a result, 20/98 isolates were confirmed to be resistant to ciprofloxacin while 10/98 was resistant to levofloxacin. CCCP decreased twofold MIC value for ciprofloxacin in six isolates and more than 16 times in one isolate, while MIC value for levofloxacin was decreased in all isolates (twofold to more than eightfold). Fluoroquinolone-resistant isolates were identified as A. xylosoxidans with the nrdA gene sequencing. PFGE revealed that resistant isolates belonged to seven different genotypes. Ten isolates belonging to four genotypes were positive for the aac-(6)-Ib-cr gene. Although resistance to fluoroquinolones was not widespread among analyzed isolates, detected contribution of efflux pumps and the presence of the aac-(6)-Ib-cr gene present a platform for emergence of more resistant strains.
PB  - Springer, Dordrecht
T2  - Folia Microbiologica
T1  - Fluoroquinolone-resistant Achromobacter xylosoxidans clinical isolates from Serbia: high prevalence of the aac-(6)-Ib-cr gene among resistant isolates
VL  - 64
IS  - 2
SP  - 153
EP  - 159
DO  - 10.1007/s12223-018-0639-7
ER  - 

@article{
author = "Lilić, Branislav and Filipić, Brankica and Malesević, Milka and Novović, Katarina and Vasiljević, Zorica and Kojić, Milan and Jovčić, Branko",
year = "2019",
abstract = "The aim of this study was to evaluate the contribution of plasmid-mediated genes and efflux to fluoroquinolone resistance in collection of Achromobacter spp. gathered during a 3-year period. Susceptibility to ciprofloxacin and levofloxacin was tested by disk diffusion and microdilution tests for a collection of 98 Achromobacter spp. clinical isolates. Identification of fluoroquinolone-resistant isolates was performed by sequencing and phylogenetic analyses of the nrdA gene. Genetic relatedness among resistant isolates was determined by pulsed-field gel electrophoresis (PFGE) analysis. The influence of an H+ conductor cyanide m-chlorophenyl hydrazone (CCCP) and a resistance-nodulation-division-type efflux pump inhibitor phenylalanine-arginine beta-naphthylamide (PAN) on minimal inhibitory concentration (MIC) value was evaluated by broth microdilution. The presence of the plasmid-mediated qnrA, qnrB, qnrC, qnrS, and aac-(6)-Ib-cr genes was investigated by PCR and sequencing. Achromobacter spp. isolates that were resistant or intermediately resistant to fluoroquinolones in disk diffusion tests (44/98) were subjected to microdilution. As a result, 20/98 isolates were confirmed to be resistant to ciprofloxacin while 10/98 was resistant to levofloxacin. CCCP decreased twofold MIC value for ciprofloxacin in six isolates and more than 16 times in one isolate, while MIC value for levofloxacin was decreased in all isolates (twofold to more than eightfold). Fluoroquinolone-resistant isolates were identified as A. xylosoxidans with the nrdA gene sequencing. PFGE revealed that resistant isolates belonged to seven different genotypes. Ten isolates belonging to four genotypes were positive for the aac-(6)-Ib-cr gene. Although resistance to fluoroquinolones was not widespread among analyzed isolates, detected contribution of efflux pumps and the presence of the aac-(6)-Ib-cr gene present a platform for emergence of more resistant strains.",
publisher = "Springer, Dordrecht",
journal = "Folia Microbiologica",
title = "Fluoroquinolone-resistant Achromobacter xylosoxidans clinical isolates from Serbia: high prevalence of the aac-(6)-Ib-cr gene among resistant isolates",
volume = "64",
number = "2",
pages = "153-159",
doi = "10.1007/s12223-018-0639-7"
}

Lilić, B., Filipić, B., Malesević, M., Novović, K., Vasiljević, Z., Kojić, M.,& Jovčić, B.. (2019). Fluoroquinolone-resistant Achromobacter xylosoxidans clinical isolates from Serbia: high prevalence of the aac-(6)-Ib-cr gene among resistant isolates. in Folia Microbiologica
Springer, Dordrecht., 64(2), 153-159.
https://doi.org/10.1007/s12223-018-0639-7

Lilić B, Filipić B, Malesević M, Novović K, Vasiljević Z, Kojić M, Jovčić B. Fluoroquinolone-resistant Achromobacter xylosoxidans clinical isolates from Serbia: high prevalence of the aac-(6)-Ib-cr gene among resistant isolates. in Folia Microbiologica. 2019;64(2):153-159.
doi:10.1007/s12223-018-0639-7 .

Lilić, Branislav, Filipić, Brankica, Malesević, Milka, Novović, Katarina, Vasiljević, Zorica, Kojić, Milan, Jovčić, Branko, "Fluoroquinolone-resistant Achromobacter xylosoxidans clinical isolates from Serbia: high prevalence of the aac-(6)-Ib-cr gene among resistant isolates" in Folia Microbiologica, 64, no. 2 (2019):153-159,
https://doi.org/10.1007/s12223-018-0639-7 . .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Malesević, Milka
AU  - Vasiljević, Zorica
AU  - Lukić, Jovanka
AU  - Novović, Katarina
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2999
AB  - Achromobacter spp. are recognized as emerging pathogens in hospitalized as well as in cystic fibrosis (CF) patients. From 2012 to 2015, we collected 69 clinical isolates (41 patient) of Achromobacter spp. from 13 patients with CF (CF isolates, n = 32) and 28 patients receiving care for other health conditions (non-CF isolates, n = 37). Molecular epidemiology and virulence potential of isolates were examined. Antimicrobial susceptibility, motility, ability to form biofilms and binding affinity to mucin, collagen, and fibronectin were tested to assess their virulence traits. The nrdA gene sequencing showed that A. xylosoxidans was the most prevalent species in both CF and non-CF patients. CF patients were also colonized with A. dolens/A, ruhlandii, A. insuavis, and A. spiritinus strains while non-CF group was somewhat less heterogenous, although A. insuavis, A. insolitus, and A. piechaudii strains were detected beside A. xylosoxidans. Three strains displayed clonal distribution, one among patients from the CF group and two among non-CF patients. No significant differences in susceptibility to antimicrobials were observed between CF and non-CF patients. About one third of the isolates were classified as strong biofilm producers, and the proportion of CF and non-CF isolates with the ability to form biofilm was almost identical. CF isolates were less motile compared to the non-CF group and no correlation was found between swimming phenotype and biofilm formation. On the other hand, CF isolates exhibited higher affinity to bind mucin, collagen, and fibronectin. In generall, CF isolates from our study exhibited in vitro properties that could be of importance for the colonization of CF patients.
PB  - Frontiers Media Sa, Lausanne
T2  - Frontiers in Cellular and Infection Microbiology
T1  - Uncovering Differences in Virulence Markers Associated with Achromobacter Species of CF and Non-CF Origin
VL  - 7
DO  - 10.3389/fcimb.2017.00224
ER  - 

@article{
author = "Filipić, Brankica and Malesević, Milka and Vasiljević, Zorica and Lukić, Jovanka and Novović, Katarina and Kojić, Milan and Jovčić, Branko",
year = "2017",
abstract = "Achromobacter spp. are recognized as emerging pathogens in hospitalized as well as in cystic fibrosis (CF) patients. From 2012 to 2015, we collected 69 clinical isolates (41 patient) of Achromobacter spp. from 13 patients with CF (CF isolates, n = 32) and 28 patients receiving care for other health conditions (non-CF isolates, n = 37). Molecular epidemiology and virulence potential of isolates were examined. Antimicrobial susceptibility, motility, ability to form biofilms and binding affinity to mucin, collagen, and fibronectin were tested to assess their virulence traits. The nrdA gene sequencing showed that A. xylosoxidans was the most prevalent species in both CF and non-CF patients. CF patients were also colonized with A. dolens/A, ruhlandii, A. insuavis, and A. spiritinus strains while non-CF group was somewhat less heterogenous, although A. insuavis, A. insolitus, and A. piechaudii strains were detected beside A. xylosoxidans. Three strains displayed clonal distribution, one among patients from the CF group and two among non-CF patients. No significant differences in susceptibility to antimicrobials were observed between CF and non-CF patients. About one third of the isolates were classified as strong biofilm producers, and the proportion of CF and non-CF isolates with the ability to form biofilm was almost identical. CF isolates were less motile compared to the non-CF group and no correlation was found between swimming phenotype and biofilm formation. On the other hand, CF isolates exhibited higher affinity to bind mucin, collagen, and fibronectin. In generall, CF isolates from our study exhibited in vitro properties that could be of importance for the colonization of CF patients.",
publisher = "Frontiers Media Sa, Lausanne",
journal = "Frontiers in Cellular and Infection Microbiology",
title = "Uncovering Differences in Virulence Markers Associated with Achromobacter Species of CF and Non-CF Origin",
volume = "7",
doi = "10.3389/fcimb.2017.00224"
}

Filipić, B., Malesević, M., Vasiljević, Z., Lukić, J., Novović, K., Kojić, M.,& Jovčić, B.. (2017). Uncovering Differences in Virulence Markers Associated with Achromobacter Species of CF and Non-CF Origin. in Frontiers in Cellular and Infection Microbiology
Frontiers Media Sa, Lausanne., 7.
https://doi.org/10.3389/fcimb.2017.00224

Filipić B, Malesević M, Vasiljević Z, Lukić J, Novović K, Kojić M, Jovčić B. Uncovering Differences in Virulence Markers Associated with Achromobacter Species of CF and Non-CF Origin. in Frontiers in Cellular and Infection Microbiology. 2017;7.
doi:10.3389/fcimb.2017.00224 .

Filipić, Brankica, Malesević, Milka, Vasiljević, Zorica, Lukić, Jovanka, Novović, Katarina, Kojić, Milan, Jovčić, Branko, "Uncovering Differences in Virulence Markers Associated with Achromobacter Species of CF and Non-CF Origin" in Frontiers in Cellular and Infection Microbiology, 7 (2017),
https://doi.org/10.3389/fcimb.2017.00224 . .

TY  - JOUR
AU  - Malesević, Milka
AU  - Vasiljević, Zorica
AU  - Sovtić, Aleksandar
AU  - Filipić, Brankica
AU  - Novović, Katarina
AU  - Kojić, Milan
AU  - Jovčić, Branko
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2974
AB  - Background: Burkholderia cenocepacia is considered one of the most problematic cystic fibrosis (CF) pathogens. Colonization prevalence in the Serbian CF population is high and virtually exclusively limited to a single highly transmissible clone of B. cenocepacia ST856 which is positive for both the B. cepacia epidemic strain marker (BCESM) and cable pilin, and is closely related to the epidemic strain CZ1 (ST32). Methods: Biofilm formation for 182 isolates, and adhesion to components of the host extracellular matrix, proteolytic activity, mucoidy and motility of selected ST856 representatives, as well as B. cenocepacia ST858 and ST859, and B. stabilis ST857, novel STs isolated from Serbian CF patients, were investigated in this study. The presence of the cepI, cepR, fliG, llpE, wbiI, and bcscV genes was analyzed. Results: Biofilm-formation ability of analyzed strains was poor under standard laboratory conditions, but changed in stress conditions (cold stress) and conditions that mimic CF milieu (increased CO2). All strains expressed ability to bind to collagen and fibronectin albeit with different intensity. Representatives of ST856 exhibited gelatinase activity. ST858, ST859 and 9/11 of ST856 genotypes were positive for swimming and twitching motility whereas ST857 was non-motile. Mucoidy was demonstrated in all ST856 genotypes, ST857 was semi-mucoid, and ST858 and ST859 were non-mucoid. Molecular analysis for major virulence factors revealed that ST856 and ST857 carried the six analyzed genes, while ST858 and ST859 were negative for the llpE gene. Conclusion: Variations in virulence phenotypes in different genotypes of epidemic B. cenocepacia ST856 clone, in vitro, could be a consequence of diversification driven by pathoadaptation. Diversity of epidemic clone genotypes virulence, could be challenging for accurate diagnosis and treatment, as well as for infection control.
PB  - Biomed Central Ltd, London
T2  - Antimicrobial Resistance and Infection Control
T1  - Virulence traits associated with Burkholderia cenocepacia ST856 epidemic strain isolated from cystic fibrosis patients
VL  - 6
DO  - 10.1186/s13756-017-0215-y
ER  - 

@article{
author = "Malesević, Milka and Vasiljević, Zorica and Sovtić, Aleksandar and Filipić, Brankica and Novović, Katarina and Kojić, Milan and Jovčić, Branko",
year = "2017",
abstract = "Background: Burkholderia cenocepacia is considered one of the most problematic cystic fibrosis (CF) pathogens. Colonization prevalence in the Serbian CF population is high and virtually exclusively limited to a single highly transmissible clone of B. cenocepacia ST856 which is positive for both the B. cepacia epidemic strain marker (BCESM) and cable pilin, and is closely related to the epidemic strain CZ1 (ST32). Methods: Biofilm formation for 182 isolates, and adhesion to components of the host extracellular matrix, proteolytic activity, mucoidy and motility of selected ST856 representatives, as well as B. cenocepacia ST858 and ST859, and B. stabilis ST857, novel STs isolated from Serbian CF patients, were investigated in this study. The presence of the cepI, cepR, fliG, llpE, wbiI, and bcscV genes was analyzed. Results: Biofilm-formation ability of analyzed strains was poor under standard laboratory conditions, but changed in stress conditions (cold stress) and conditions that mimic CF milieu (increased CO2). All strains expressed ability to bind to collagen and fibronectin albeit with different intensity. Representatives of ST856 exhibited gelatinase activity. ST858, ST859 and 9/11 of ST856 genotypes were positive for swimming and twitching motility whereas ST857 was non-motile. Mucoidy was demonstrated in all ST856 genotypes, ST857 was semi-mucoid, and ST858 and ST859 were non-mucoid. Molecular analysis for major virulence factors revealed that ST856 and ST857 carried the six analyzed genes, while ST858 and ST859 were negative for the llpE gene. Conclusion: Variations in virulence phenotypes in different genotypes of epidemic B. cenocepacia ST856 clone, in vitro, could be a consequence of diversification driven by pathoadaptation. Diversity of epidemic clone genotypes virulence, could be challenging for accurate diagnosis and treatment, as well as for infection control.",
publisher = "Biomed Central Ltd, London",
journal = "Antimicrobial Resistance and Infection Control",
title = "Virulence traits associated with Burkholderia cenocepacia ST856 epidemic strain isolated from cystic fibrosis patients",
volume = "6",
doi = "10.1186/s13756-017-0215-y"
}

Malesević, M., Vasiljević, Z., Sovtić, A., Filipić, B., Novović, K., Kojić, M.,& Jovčić, B.. (2017). Virulence traits associated with Burkholderia cenocepacia ST856 epidemic strain isolated from cystic fibrosis patients. in Antimicrobial Resistance and Infection Control
Biomed Central Ltd, London., 6.
https://doi.org/10.1186/s13756-017-0215-y

Malesević M, Vasiljević Z, Sovtić A, Filipić B, Novović K, Kojić M, Jovčić B. Virulence traits associated with Burkholderia cenocepacia ST856 epidemic strain isolated from cystic fibrosis patients. in Antimicrobial Resistance and Infection Control. 2017;6.
doi:10.1186/s13756-017-0215-y .

Malesević, Milka, Vasiljević, Zorica, Sovtić, Aleksandar, Filipić, Brankica, Novović, Katarina, Kojić, Milan, Jovčić, Branko, "Virulence traits associated with Burkholderia cenocepacia ST856 epidemic strain isolated from cystic fibrosis patients" in Antimicrobial Resistance and Infection Control, 6 (2017),
https://doi.org/10.1186/s13756-017-0215-y . .

TY  - JOUR
AU  - Novović, Katarina
AU  - Mihajlović, Sanja
AU  - Vasiljević, Zorica
AU  - Filipić, Brankica
AU  - Begović, Jelena
AU  - Jovčić, Branko
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2421
AB  - Carbapenem-resistant A. baumannii present a significant therapeutic challenge for the treatment of nosocomial infections in many European countries. Although it is known that the gradient of A. baumannii prevalence increases from northern to southern Europe, this study provides the first data from Serbia. Twenty-eight carbapenem-resistant A. baumannii clinical isolates were collected at a Serbian pediatric hospital during a 2-year period. The majority of isolates (67.68%) belonged to the sequence type Group 1, European clonal complex II. All isolates harbored intrinsic OXA-51 and AmpC cephalosporinase. OXA-23 was detected in 16 isolates (57.14%), OXA-24 in 23 isolates (82.14%) and OXA-58 in 11 isolates (39.29%). Six of the isolates (21.43%) harbored all of the analyzed oxacillinases, except OXA-143 and OXA-235 that were not detected in this study. Production of oxacillinases was detected in different pulsotypes indicating the presence of horizontal gene transfer. NDM-1, VIM and IMP were not detected in analyzed clinical A. baumannii isolates. ISAba1 insertion sequence was present upstream of OXA-51 in one isolate, upstream of AmpC in 13 isolates and upstream of OXA-23 in 10 isolates. In silico analysis of carO sequences from analyzed A. baumannii isolates revealed the existence of two out of six highly polymorphic CarO variants. The phylogenetic analysis of CarO protein among Acinetobacter species revised the previous classification CarO variants into three groups based on strong bootstraps scores in the tree analysis. Group I comprises four variants (I-IV) while Groups II and III contain only one variant each. One half of the Serbian clinical isolates belong to Group I variant I, while the other half belongs to Group I variant III.
PB  - Public Library Science, San Francisco
T2  - PLoS One
T1  - Carbapenem-Resistant Acinetobacter baumannii from Serbia: Revision of CarO Classification
VL  - 10
IS  - 3
DO  - 10.1371/journal.pone.0122793
ER  - 

@article{
author = "Novović, Katarina and Mihajlović, Sanja and Vasiljević, Zorica and Filipić, Brankica and Begović, Jelena and Jovčić, Branko",
year = "2015",
abstract = "Carbapenem-resistant A. baumannii present a significant therapeutic challenge for the treatment of nosocomial infections in many European countries. Although it is known that the gradient of A. baumannii prevalence increases from northern to southern Europe, this study provides the first data from Serbia. Twenty-eight carbapenem-resistant A. baumannii clinical isolates were collected at a Serbian pediatric hospital during a 2-year period. The majority of isolates (67.68%) belonged to the sequence type Group 1, European clonal complex II. All isolates harbored intrinsic OXA-51 and AmpC cephalosporinase. OXA-23 was detected in 16 isolates (57.14%), OXA-24 in 23 isolates (82.14%) and OXA-58 in 11 isolates (39.29%). Six of the isolates (21.43%) harbored all of the analyzed oxacillinases, except OXA-143 and OXA-235 that were not detected in this study. Production of oxacillinases was detected in different pulsotypes indicating the presence of horizontal gene transfer. NDM-1, VIM and IMP were not detected in analyzed clinical A. baumannii isolates. ISAba1 insertion sequence was present upstream of OXA-51 in one isolate, upstream of AmpC in 13 isolates and upstream of OXA-23 in 10 isolates. In silico analysis of carO sequences from analyzed A. baumannii isolates revealed the existence of two out of six highly polymorphic CarO variants. The phylogenetic analysis of CarO protein among Acinetobacter species revised the previous classification CarO variants into three groups based on strong bootstraps scores in the tree analysis. Group I comprises four variants (I-IV) while Groups II and III contain only one variant each. One half of the Serbian clinical isolates belong to Group I variant I, while the other half belongs to Group I variant III.",
publisher = "Public Library Science, San Francisco",
journal = "PLoS One",
title = "Carbapenem-Resistant Acinetobacter baumannii from Serbia: Revision of CarO Classification",
volume = "10",
number = "3",
doi = "10.1371/journal.pone.0122793"
}

Novović, K., Mihajlović, S., Vasiljević, Z., Filipić, B., Begović, J.,& Jovčić, B.. (2015). Carbapenem-Resistant Acinetobacter baumannii from Serbia: Revision of CarO Classification. in PLoS One
Public Library Science, San Francisco., 10(3).
https://doi.org/10.1371/journal.pone.0122793

Novović K, Mihajlović S, Vasiljević Z, Filipić B, Begović J, Jovčić B. Carbapenem-Resistant Acinetobacter baumannii from Serbia: Revision of CarO Classification. in PLoS One. 2015;10(3).
doi:10.1371/journal.pone.0122793 .

Novović, Katarina, Mihajlović, Sanja, Vasiljević, Zorica, Filipić, Brankica, Begović, Jelena, Jovčić, Branko, "Carbapenem-Resistant Acinetobacter baumannii from Serbia: Revision of CarO Classification" in PLoS One, 10, no. 3 (2015),
https://doi.org/10.1371/journal.pone.0122793 . .

TY  - JOUR
AU  - Novović, Katarina
AU  - Filipić, Brankica
AU  - Veljović, Katarina
AU  - Begović, J.
AU  - Mirković, Nemanja
AU  - Jovčić, Branko
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2388
AB  - New Delhi metallo-beta-lactamase-1 (NDM-1) will soon become the most commonly isolated and distributed metallo-beta-lactamase worldwide due to its rapid international dissemination and its ability to be expressed by numerous Gram-negative pathogens. NDM-positive bacteria pose a significant public health threat in the Indian subcontinent and the Balkans, which have been designated as endemic regions. Our study was focused on urban rivers, a lake and springheads as a potential source of NDM-1-producing strains in Serbia, but also as a source of other metallo-beta-lactamases and extended-spectrum beta-lactamase (ESBL) producing bacteria. A total of 69 beta-lactam resistant isolates, belonging to 12 bacterial genera, were collected from 8 out of 10 different locations in Belgrade, of which the most were from a popular recreational site, Ada Ciganlija Lake. Phenotypic tests revealed 7 (10.14%) ESBL-producing isolates and 39 (56.52%) isolates resistant to imipenem, of which 32 were positive for metallo-beta-lactamase (MBL) production. PCR and sequencing revealed the presence of genetic determinants for SHV (3 isolates), DHA-1 (1 isolate) and CMY-2 (1 isolate) beta-lactamases. However, we did not detect any NDM-1-producing strains (previously described cases of NDM-1 from Serbia were limited to Belgrade), so we propose that Serbian NDM-1 is in fact a transplant and a nosocomial, rather than an environmental, issue and that Serbia is not an endemic region for NDM-1.
PB  - Elsevier Science BV, Amsterdam
T2  - Scientia Horticulturae
T1  - Environmental waters and bla(NDm-1) in Belgrade, Serbia: Endemicity questioned
VL  - 511
SP  - 393
EP  - 398
DO  - 10.1016/j.scitotenv.2014.12.072
ER  - 

@article{
author = "Novović, Katarina and Filipić, Brankica and Veljović, Katarina and Begović, J. and Mirković, Nemanja and Jovčić, Branko",
year = "2015",
abstract = "New Delhi metallo-beta-lactamase-1 (NDM-1) will soon become the most commonly isolated and distributed metallo-beta-lactamase worldwide due to its rapid international dissemination and its ability to be expressed by numerous Gram-negative pathogens. NDM-positive bacteria pose a significant public health threat in the Indian subcontinent and the Balkans, which have been designated as endemic regions. Our study was focused on urban rivers, a lake and springheads as a potential source of NDM-1-producing strains in Serbia, but also as a source of other metallo-beta-lactamases and extended-spectrum beta-lactamase (ESBL) producing bacteria. A total of 69 beta-lactam resistant isolates, belonging to 12 bacterial genera, were collected from 8 out of 10 different locations in Belgrade, of which the most were from a popular recreational site, Ada Ciganlija Lake. Phenotypic tests revealed 7 (10.14%) ESBL-producing isolates and 39 (56.52%) isolates resistant to imipenem, of which 32 were positive for metallo-beta-lactamase (MBL) production. PCR and sequencing revealed the presence of genetic determinants for SHV (3 isolates), DHA-1 (1 isolate) and CMY-2 (1 isolate) beta-lactamases. However, we did not detect any NDM-1-producing strains (previously described cases of NDM-1 from Serbia were limited to Belgrade), so we propose that Serbian NDM-1 is in fact a transplant and a nosocomial, rather than an environmental, issue and that Serbia is not an endemic region for NDM-1.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Scientia Horticulturae",
title = "Environmental waters and bla(NDm-1) in Belgrade, Serbia: Endemicity questioned",
volume = "511",
pages = "393-398",
doi = "10.1016/j.scitotenv.2014.12.072"
}

Novović, K., Filipić, B., Veljović, K., Begović, J., Mirković, N.,& Jovčić, B.. (2015). Environmental waters and bla(NDm-1) in Belgrade, Serbia: Endemicity questioned. in Scientia Horticulturae
Elsevier Science BV, Amsterdam., 511, 393-398.
https://doi.org/10.1016/j.scitotenv.2014.12.072

Novović K, Filipić B, Veljović K, Begović J, Mirković N, Jovčić B. Environmental waters and bla(NDm-1) in Belgrade, Serbia: Endemicity questioned. in Scientia Horticulturae. 2015;511:393-398.
doi:10.1016/j.scitotenv.2014.12.072 .

Novović, Katarina, Filipić, Brankica, Veljović, Katarina, Begović, J., Mirković, Nemanja, Jovčić, Branko, "Environmental waters and bla(NDm-1) in Belgrade, Serbia: Endemicity questioned" in Scientia Horticulturae, 511 (2015):393-398,
https://doi.org/10.1016/j.scitotenv.2014.12.072 . .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Golić, Nataša
AU  - Jovčić, Branko
AU  - Ćupić-Miladinović, Dejana
AU  - Soković, Svetlana
AU  - Popović, Dušanka
AU  - Kojić, Milan
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2483
AB  - Lactic acid bacteria (LAB) are widely used in the food industry, especially in the pro­duction of fermented dairy products and meat. The most studied species among LAB is Lactococcus lactis. L. lactis strains are of great importance in the production of fermented dairy products such as yogurt, butter, fresh cheese and some kind of semi-hard cheese. Although L. lactis acquired the 'Generally Regarded As Safe' (GRAS) status, many investigations indicated that lactococci may act as reservoirs of antibiotic resistance genes, which could be transferred to other bacterial species in human gastrointestinal tract includ­ing pathogens. The genome analysis of L. lactis indicated the presence of at least 40 putative drug transporter genes, and only four multidrug resistance (MDR) transporters are functional­ly characterized: LmrA, LmrP, LmrCD i CmbT. LmrA is the first described MDR transport­er in prokaryotes. LmrCD is responsible for resistance to cholate, which is an integral part of human bile and LmrCD is important for intestinal survival of lactococci that are used as probiotics. Secondary multidrug transporter LmrP confers resistance to lincosamides, mac­rolides, streptogramins and tetracyclines. CmbT protein has an effect on the host cell re­sistance to lincomycin, sulfadiazine, streptomycin, rifampicin, puromycin and sulfametox­azole. Since the food chain is an important way of transmitting resistance genes in human and animal population, it is of great importance to study the mechanisms of resistance in lactococci and other LAB, intended for the food industry.
AB  - Bakterije mlečne kiseline (BMK) imaju veliku primenu u prehrambenoj industriji, posebno u proizvodnji fermentisanih mlečnih proizvoda i mesa. Najviše izučavana vrsta u okviru BMK je Lactococcus lactis. Sojevi koji pripadaju vrsti L. lactis su od izuzetnog značaja u proizvodnji fermentisanih mlečnih proizvoda poput kiselog mleka, maslaca, svežih sireva i nekih vrsta polutvrdih sireva. Iako se generalno laktokoke smatraju bezbednim mikroorganizmima, istraživanja ukazuju da mogu biti rezervoari gena za rezistenciju na antibiotike, koji se horizontalnim transferom mogu preneti na druge bakterijske vrste, uključujući i patogene. Pokazano je da se u membrani bakterija vrste L. lactis nalaze efluksne pumpe koje obezbeđuju rezistenciju na strukturno različite supstrate (eng. multidrug resistance transporters-MDR). Analizom genoma L. lactis detektovano je prisustvo 40 potencijalnih gena koji kodiraju MDR transportere, od čega su do danas svega četiri funkcionalno okarakterisana: LmrA, LmrP, LmrCD i CmbT. LmrA je prvi uopšte opisan primarni transporter kod prokariota. LmrCD obezbeđuje rezistenciju na holat koji ulazi u sastav žuči, što je značajno za preživljavanje laktokoka koje se primenjuju kao probiotici u digestivnom traktu ljudi i životinja. LmrP je sekundarni transporter i obezbeđuje rezistenciju na neke linkozamide, makrolide, streptogramine I tetracikline. CmbT je poslednji okarakterisan MDR transporter kod L. lactis i doprinosi rezistenciji na linkomicin, sulfonamidne antibiotike, sulfametoksazol i sulfadiazin, aminoglikozidni antibiotik streptomicin, aminonukleozidni antibiotik puromicin i semisintetski antibiotik rifampicin. Kako lanac hrane predstavlja važan put prenosa gena za rezistenciju u okviru ljudske i životinjske populacije, neophodno je intenzivno izučavanje mehanizama rezistencije kod laktokoka i drugih BMK namenjenih za upotrebu u prehrambenoj industriji.
PB  - Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd
T2  - Veterinarski glasnik
T1  - Resistance to antibiotics in lacid acid bacteria: Strain Lactococcus
T1  - Rezistencija na antibiotike kod bakterija mlečne kiseline - rod Lactococcus
VL  - 69
IS  - 3-4
SP  - 271
EP  - 281
DO  - 10.2298/VETGL1504271F
ER  - 

@article{
author = "Filipić, Brankica and Golić, Nataša and Jovčić, Branko and Ćupić-Miladinović, Dejana and Soković, Svetlana and Popović, Dušanka and Kojić, Milan",
year = "2015",
abstract = "Lactic acid bacteria (LAB) are widely used in the food industry, especially in the pro­duction of fermented dairy products and meat. The most studied species among LAB is Lactococcus lactis. L. lactis strains are of great importance in the production of fermented dairy products such as yogurt, butter, fresh cheese and some kind of semi-hard cheese. Although L. lactis acquired the 'Generally Regarded As Safe' (GRAS) status, many investigations indicated that lactococci may act as reservoirs of antibiotic resistance genes, which could be transferred to other bacterial species in human gastrointestinal tract includ­ing pathogens. The genome analysis of L. lactis indicated the presence of at least 40 putative drug transporter genes, and only four multidrug resistance (MDR) transporters are functional­ly characterized: LmrA, LmrP, LmrCD i CmbT. LmrA is the first described MDR transport­er in prokaryotes. LmrCD is responsible for resistance to cholate, which is an integral part of human bile and LmrCD is important for intestinal survival of lactococci that are used as probiotics. Secondary multidrug transporter LmrP confers resistance to lincosamides, mac­rolides, streptogramins and tetracyclines. CmbT protein has an effect on the host cell re­sistance to lincomycin, sulfadiazine, streptomycin, rifampicin, puromycin and sulfametox­azole. Since the food chain is an important way of transmitting resistance genes in human and animal population, it is of great importance to study the mechanisms of resistance in lactococci and other LAB, intended for the food industry., Bakterije mlečne kiseline (BMK) imaju veliku primenu u prehrambenoj industriji, posebno u proizvodnji fermentisanih mlečnih proizvoda i mesa. Najviše izučavana vrsta u okviru BMK je Lactococcus lactis. Sojevi koji pripadaju vrsti L. lactis su od izuzetnog značaja u proizvodnji fermentisanih mlečnih proizvoda poput kiselog mleka, maslaca, svežih sireva i nekih vrsta polutvrdih sireva. Iako se generalno laktokoke smatraju bezbednim mikroorganizmima, istraživanja ukazuju da mogu biti rezervoari gena za rezistenciju na antibiotike, koji se horizontalnim transferom mogu preneti na druge bakterijske vrste, uključujući i patogene. Pokazano je da se u membrani bakterija vrste L. lactis nalaze efluksne pumpe koje obezbeđuju rezistenciju na strukturno različite supstrate (eng. multidrug resistance transporters-MDR). Analizom genoma L. lactis detektovano je prisustvo 40 potencijalnih gena koji kodiraju MDR transportere, od čega su do danas svega četiri funkcionalno okarakterisana: LmrA, LmrP, LmrCD i CmbT. LmrA je prvi uopšte opisan primarni transporter kod prokariota. LmrCD obezbeđuje rezistenciju na holat koji ulazi u sastav žuči, što je značajno za preživljavanje laktokoka koje se primenjuju kao probiotici u digestivnom traktu ljudi i životinja. LmrP je sekundarni transporter i obezbeđuje rezistenciju na neke linkozamide, makrolide, streptogramine I tetracikline. CmbT je poslednji okarakterisan MDR transporter kod L. lactis i doprinosi rezistenciji na linkomicin, sulfonamidne antibiotike, sulfametoksazol i sulfadiazin, aminoglikozidni antibiotik streptomicin, aminonukleozidni antibiotik puromicin i semisintetski antibiotik rifampicin. Kako lanac hrane predstavlja važan put prenosa gena za rezistenciju u okviru ljudske i životinjske populacije, neophodno je intenzivno izučavanje mehanizama rezistencije kod laktokoka i drugih BMK namenjenih za upotrebu u prehrambenoj industriji.",
publisher = "Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd",
journal = "Veterinarski glasnik",
title = "Resistance to antibiotics in lacid acid bacteria: Strain Lactococcus, Rezistencija na antibiotike kod bakterija mlečne kiseline - rod Lactococcus",
volume = "69",
number = "3-4",
pages = "271-281",
doi = "10.2298/VETGL1504271F"
}

Filipić, B., Golić, N., Jovčić, B., Ćupić-Miladinović, D., Soković, S., Popović, D.,& Kojić, M.. (2015). Resistance to antibiotics in lacid acid bacteria: Strain Lactococcus. in Veterinarski glasnik
Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd., 69(3-4), 271-281.
https://doi.org/10.2298/VETGL1504271F

Filipić B, Golić N, Jovčić B, Ćupić-Miladinović D, Soković S, Popović D, Kojić M. Resistance to antibiotics in lacid acid bacteria: Strain Lactococcus. in Veterinarski glasnik. 2015;69(3-4):271-281.
doi:10.2298/VETGL1504271F .

Filipić, Brankica, Golić, Nataša, Jovčić, Branko, Ćupić-Miladinović, Dejana, Soković, Svetlana, Popović, Dušanka, Kojić, Milan, "Resistance to antibiotics in lacid acid bacteria: Strain Lactococcus" in Veterinarski glasnik, 69, no. 3-4 (2015):271-281,
https://doi.org/10.2298/VETGL1504271F . .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Nikolić, Katarina
AU  - Filipić, Slavica
AU  - Jovčić, Branko
AU  - Agbaba, Danica
AU  - Antić-Stanković, Jelena
AU  - Kojić, Milan
AU  - Golić, Nataša
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2232
AB  - The CmbT substrate specificity and its role as a proton motive force-driven drug efflux pump at a molecular level were investigated in the study. In that order, 3D-quantitative structure-activity relationship (3D-QSAR) study was applied for selection of molecular determinants of multidrug recognition by CmbT. CmbT multidrug resistance protein of Lactococcus lactis contributes to extruding the structurally, chemically, and pharmacologically diverse range of substrates out of bacterial cells. This function of CmbT may result in the failure of antibiotic therapy. Homology model of CmbT protein was constructed and further opthnized. The 3D-QSAR model predictive potential was proved by use of leave-one-out cross validation Of the training set (Q(2): 0.69, R-observd(2) (vs).(Predicted) : 0.918, RMSEE: 0.193) and verification set (R-Observed vs predicted(2) : 0.704, RMSEP: 0.289). The results obtained in this study showed that high CmbT affinities to ethidium, sulbactam, and sulfathiazole could be related to the absence of significant unfavourable interactions. In contrast, the presence of specific unfavourable interaction between two hydrogen bond donor groups in bacitracin, apramycin, novobiocin, vancomycin, kanamycin, gentamycin, and tobramycin is found to be the main reason for their lower CmbT affinities. In addition, membrane position of the CmbT binding site and positive correlation between substrates lipophilicity (log D-PH so) and CmbT affinity strongly indicates that CmbT recognizes its substrates within the membrane.
PB  - Elsevier Science BV, Amsterdam
T2  - Journal of the Taiwan Institute of Chemical Engineers
T1  - Identifying the CmbT substrates specificity by using a quantitative structure-activity relationship (QSAR) study
VL  - 45
IS  - 3
SP  - 764
EP  - 771
DO  - 10.1016/j.jtice.2013.09.033
ER  - 

@article{
author = "Filipić, Brankica and Nikolić, Katarina and Filipić, Slavica and Jovčić, Branko and Agbaba, Danica and Antić-Stanković, Jelena and Kojić, Milan and Golić, Nataša",
year = "2014",
abstract = "The CmbT substrate specificity and its role as a proton motive force-driven drug efflux pump at a molecular level were investigated in the study. In that order, 3D-quantitative structure-activity relationship (3D-QSAR) study was applied for selection of molecular determinants of multidrug recognition by CmbT. CmbT multidrug resistance protein of Lactococcus lactis contributes to extruding the structurally, chemically, and pharmacologically diverse range of substrates out of bacterial cells. This function of CmbT may result in the failure of antibiotic therapy. Homology model of CmbT protein was constructed and further opthnized. The 3D-QSAR model predictive potential was proved by use of leave-one-out cross validation Of the training set (Q(2): 0.69, R-observd(2) (vs).(Predicted) : 0.918, RMSEE: 0.193) and verification set (R-Observed vs predicted(2) : 0.704, RMSEP: 0.289). The results obtained in this study showed that high CmbT affinities to ethidium, sulbactam, and sulfathiazole could be related to the absence of significant unfavourable interactions. In contrast, the presence of specific unfavourable interaction between two hydrogen bond donor groups in bacitracin, apramycin, novobiocin, vancomycin, kanamycin, gentamycin, and tobramycin is found to be the main reason for their lower CmbT affinities. In addition, membrane position of the CmbT binding site and positive correlation between substrates lipophilicity (log D-PH so) and CmbT affinity strongly indicates that CmbT recognizes its substrates within the membrane.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Journal of the Taiwan Institute of Chemical Engineers",
title = "Identifying the CmbT substrates specificity by using a quantitative structure-activity relationship (QSAR) study",
volume = "45",
number = "3",
pages = "764-771",
doi = "10.1016/j.jtice.2013.09.033"
}

Filipić, B., Nikolić, K., Filipić, S., Jovčić, B., Agbaba, D., Antić-Stanković, J., Kojić, M.,& Golić, N.. (2014). Identifying the CmbT substrates specificity by using a quantitative structure-activity relationship (QSAR) study. in Journal of the Taiwan Institute of Chemical Engineers
Elsevier Science BV, Amsterdam., 45(3), 764-771.
https://doi.org/10.1016/j.jtice.2013.09.033

Filipić B, Nikolić K, Filipić S, Jovčić B, Agbaba D, Antić-Stanković J, Kojić M, Golić N. Identifying the CmbT substrates specificity by using a quantitative structure-activity relationship (QSAR) study. in Journal of the Taiwan Institute of Chemical Engineers. 2014;45(3):764-771.
doi:10.1016/j.jtice.2013.09.033 .

Filipić, Brankica, Nikolić, Katarina, Filipić, Slavica, Jovčić, Branko, Agbaba, Danica, Antić-Stanković, Jelena, Kojić, Milan, Golić, Nataša, "Identifying the CmbT substrates specificity by using a quantitative structure-activity relationship (QSAR) study" in Journal of the Taiwan Institute of Chemical Engineers, 45, no. 3 (2014):764-771,
https://doi.org/10.1016/j.jtice.2013.09.033 . .

TY  - JOUR
AU  - Uroić, Ksenija
AU  - Nikolić, Milica
AU  - Kos, Blazenka
AU  - Lebos-Pavunc, Andreja
AU  - Beganović, Jasna
AU  - Lukić, Jovanka
AU  - Jovčić, Branko
AU  - Filipić, Brankica
AU  - Miljković, Marija
AU  - Golić, Nataša
AU  - Topisirović, Ljubiša
AU  - Cadez, Neza
AU  - Raspor, Peter
AU  - Susković, Jagoda
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2197
AB  - The aim of this study is to gain insight into the probiotic potential of autochthonous lactic acid bacteria (LAB) isolated from artisanal fresh soft and white pickled cheeses. Eleven out of 86 LAB isolates from traditionally produced artisanal fresh soft and white pickled cheeses which survived the most rigorous simulated gastrointestinal tract conditions and did not show resistance to antibiotics were subjected to further evaluation for functional probiotic properties. The ability of the examined strains to assimilate cholesterol in the presence of bile salts was strain dependent, with the highest percentage of cholesterol assimilated by strain Lactobacillus brevis BGGO7-28 possessing S-layer proteins on its cell surface. The growth of strains with mannitol or lactulose as the only carbon source was better than with fructooligosaccharides (FOS) and inulin as prebiotic substrates, which should be considered in the production of synbiotics. Moreover, the results demonstrated that the strains were highly adhesive to human enterocyte-like Caco-2 cells and to a lesser extent to HT29-MTX cells, with the exception of strain Lb. brevis BGGO7-28, which showed similar percentage of adhesion to both cell lines. This strain was the only one with the acidic cell surface, while other examined strains have the cell surfaces with electron donor and basic properties. In addition, all selected strains decreased the proliferation of gut-associated lymphoid tissue (GALT) cells, suggesting possible immunomodulatory potential of the isolates. Finally, the number of viable cells in dry active preparations after lyophilisation depended on the lyoprotectant used (inulin, FOS or skimmed milk), as well as on the strain subjected to lyophilisation. In conclusion, the results obtained in this study demonstrate that particular dairy LAB isolates exhibit strain-specific probiotic properties. Thus, they could be further examined as part of mixed autochthonous starter cultures for traditional cheese production under controlled conditions.
PB  - Faculty Food Technology Biotechnology, Zagreb
T2  - Food Technology and Biotechnology
T1  - Probiotic Properties of Lactic Acid Bacteria Isolated from Croatian Fresh Soft Cheese and Serbian White Pickled Cheese
VL  - 52
IS  - 2
SP  - 232
EP  - 241
UR  - https://hdl.handle.net/21.15107/rcub_farfar_2197
ER  - 

@article{
author = "Uroić, Ksenija and Nikolić, Milica and Kos, Blazenka and Lebos-Pavunc, Andreja and Beganović, Jasna and Lukić, Jovanka and Jovčić, Branko and Filipić, Brankica and Miljković, Marija and Golić, Nataša and Topisirović, Ljubiša and Cadez, Neza and Raspor, Peter and Susković, Jagoda",
year = "2014",
abstract = "The aim of this study is to gain insight into the probiotic potential of autochthonous lactic acid bacteria (LAB) isolated from artisanal fresh soft and white pickled cheeses. Eleven out of 86 LAB isolates from traditionally produced artisanal fresh soft and white pickled cheeses which survived the most rigorous simulated gastrointestinal tract conditions and did not show resistance to antibiotics were subjected to further evaluation for functional probiotic properties. The ability of the examined strains to assimilate cholesterol in the presence of bile salts was strain dependent, with the highest percentage of cholesterol assimilated by strain Lactobacillus brevis BGGO7-28 possessing S-layer proteins on its cell surface. The growth of strains with mannitol or lactulose as the only carbon source was better than with fructooligosaccharides (FOS) and inulin as prebiotic substrates, which should be considered in the production of synbiotics. Moreover, the results demonstrated that the strains were highly adhesive to human enterocyte-like Caco-2 cells and to a lesser extent to HT29-MTX cells, with the exception of strain Lb. brevis BGGO7-28, which showed similar percentage of adhesion to both cell lines. This strain was the only one with the acidic cell surface, while other examined strains have the cell surfaces with electron donor and basic properties. In addition, all selected strains decreased the proliferation of gut-associated lymphoid tissue (GALT) cells, suggesting possible immunomodulatory potential of the isolates. Finally, the number of viable cells in dry active preparations after lyophilisation depended on the lyoprotectant used (inulin, FOS or skimmed milk), as well as on the strain subjected to lyophilisation. In conclusion, the results obtained in this study demonstrate that particular dairy LAB isolates exhibit strain-specific probiotic properties. Thus, they could be further examined as part of mixed autochthonous starter cultures for traditional cheese production under controlled conditions.",
publisher = "Faculty Food Technology Biotechnology, Zagreb",
journal = "Food Technology and Biotechnology",
title = "Probiotic Properties of Lactic Acid Bacteria Isolated from Croatian Fresh Soft Cheese and Serbian White Pickled Cheese",
volume = "52",
number = "2",
pages = "232-241",
url = "https://hdl.handle.net/21.15107/rcub_farfar_2197"
}

Uroić, K., Nikolić, M., Kos, B., Lebos-Pavunc, A., Beganović, J., Lukić, J., Jovčić, B., Filipić, B., Miljković, M., Golić, N., Topisirović, L., Cadez, N., Raspor, P.,& Susković, J.. (2014). Probiotic Properties of Lactic Acid Bacteria Isolated from Croatian Fresh Soft Cheese and Serbian White Pickled Cheese. in Food Technology and Biotechnology
Faculty Food Technology Biotechnology, Zagreb., 52(2), 232-241.
https://hdl.handle.net/21.15107/rcub_farfar_2197

Uroić K, Nikolić M, Kos B, Lebos-Pavunc A, Beganović J, Lukić J, Jovčić B, Filipić B, Miljković M, Golić N, Topisirović L, Cadez N, Raspor P, Susković J. Probiotic Properties of Lactic Acid Bacteria Isolated from Croatian Fresh Soft Cheese and Serbian White Pickled Cheese. in Food Technology and Biotechnology. 2014;52(2):232-241.
https://hdl.handle.net/21.15107/rcub_farfar_2197 .

Uroić, Ksenija, Nikolić, Milica, Kos, Blazenka, Lebos-Pavunc, Andreja, Beganović, Jasna, Lukić, Jovanka, Jovčić, Branko, Filipić, Brankica, Miljković, Marija, Golić, Nataša, Topisirović, Ljubiša, Cadez, Neza, Raspor, Peter, Susković, Jagoda, "Probiotic Properties of Lactic Acid Bacteria Isolated from Croatian Fresh Soft Cheese and Serbian White Pickled Cheese" in Food Technology and Biotechnology, 52, no. 2 (2014):232-241,
https://hdl.handle.net/21.15107/rcub_farfar_2197 .

TY  - JOUR
AU  - Jovčić, Branko
AU  - Lepsanović, Zorica
AU  - Begović, Jelena
AU  - Filipić, Brankica
AU  - Kojić, Milan
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2173
AB  - New Delhi metallo-beta-lactamase producing Pseudomonas aeruginosa isolates are of special interest since P. aeruginosa is a major cause of nosocomial infections, the treatment of which could now be jeopardized, especially in developing countries. Six additional NDM-1 positive P. aeruginosa clinical isolates belonging to two different genotypes were shown to be plasmid-free. PFGE-hybridization experiments revealed the chromosomal location of the bla (NDM-1) gene. Restriction analysis and hybridization revealed that two copies of the bla (NDM-1) gene are present in the genomes of all tested isolates, as in previously characterized P. aeruginosa MMA83. Moreover, it was shown that increasing imipenem concentration did not have the effect on copy number of the bla (NDM-1) gene in the genome of P. aeruginosa MMA83.
PB  - Springer, Dordrecht
T2  - Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology
T1  - Two copies of bla (NDM-1) gene are present in NDM-1 producing Pseudomonas aeruginosa isolates from Serbia
VL  - 105
IS  - 3
SP  - 613
EP  - 618
DO  - 10.1007/s10482-013-0094-z
ER  - 

@article{
author = "Jovčić, Branko and Lepsanović, Zorica and Begović, Jelena and Filipić, Brankica and Kojić, Milan",
year = "2014",
abstract = "New Delhi metallo-beta-lactamase producing Pseudomonas aeruginosa isolates are of special interest since P. aeruginosa is a major cause of nosocomial infections, the treatment of which could now be jeopardized, especially in developing countries. Six additional NDM-1 positive P. aeruginosa clinical isolates belonging to two different genotypes were shown to be plasmid-free. PFGE-hybridization experiments revealed the chromosomal location of the bla (NDM-1) gene. Restriction analysis and hybridization revealed that two copies of the bla (NDM-1) gene are present in the genomes of all tested isolates, as in previously characterized P. aeruginosa MMA83. Moreover, it was shown that increasing imipenem concentration did not have the effect on copy number of the bla (NDM-1) gene in the genome of P. aeruginosa MMA83.",
publisher = "Springer, Dordrecht",
journal = "Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology",
title = "Two copies of bla (NDM-1) gene are present in NDM-1 producing Pseudomonas aeruginosa isolates from Serbia",
volume = "105",
number = "3",
pages = "613-618",
doi = "10.1007/s10482-013-0094-z"
}

Jovčić, B., Lepsanović, Z., Begović, J., Filipić, B.,& Kojić, M.. (2014). Two copies of bla (NDM-1) gene are present in NDM-1 producing Pseudomonas aeruginosa isolates from Serbia. in Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology
Springer, Dordrecht., 105(3), 613-618.
https://doi.org/10.1007/s10482-013-0094-z

Jovčić B, Lepsanović Z, Begović J, Filipić B, Kojić M. Two copies of bla (NDM-1) gene are present in NDM-1 producing Pseudomonas aeruginosa isolates from Serbia. in Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology. 2014;105(3):613-618.
doi:10.1007/s10482-013-0094-z .

Jovčić, Branko, Lepsanović, Zorica, Begović, Jelena, Filipić, Brankica, Kojić, Milan, "Two copies of bla (NDM-1) gene are present in NDM-1 producing Pseudomonas aeruginosa isolates from Serbia" in Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology, 105, no. 3 (2014):613-618,
https://doi.org/10.1007/s10482-013-0094-z . .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Jovčić, Branko
AU  - Uzelac, Gordana
AU  - Miljković, Marija
AU  - Antić-Stanković, Jelena
AU  - Topisirović, Ljubiša
AU  - Golić, Nataša
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2045
AB  - The influence of the over-expression of CmbT multidrug resistance transporter on the growth rate of Lactococcus lactis NZ9000 was studied. L. lactis is a lactic acid bacteria (LAB) widely used as a starter culture in dairy industry. Recently characterized CmbT MDR transporter in L. lactis confers resistance to a wide variety of toxic compounds as well as to some clinically relevant antibiotics. In this study, the cmbT gene was over-expressed in the strain L. lactis NZ9000 in the presence of nisin inducer. Over-expression of the cmbT gene in L. lactis NZ9000 was followed by RT-PCR. The obtained results showed that the cmbT gene was successfully over-expressed by addition of sub-inhibitory amounts of nisin. Growth curves of L. lactis NZ9000/pCT50 over-expressing the cmbT gene and L. lactis NZ9000 control strain were followed in the rich medium as well as in the chemically defined medium in the presence solely of methionine (0.084 mM) or mix of methionine and cysteine (8.4 mM and 8.2 mM, respectively). Resulting doubling times revealed that L. lactis NZ9000/pCT50 had higher growth rate comparing to the control strain. This could be a consequence of the CmbT efflux activity, which improves the fitness of the host bacterium through the elimination of toxic compounds from the cell.
AB  - U ovom radu je izučavan uticaj povećane ekspresije cmbT gena, odgovornog za sintezu CmbT MDR transportera, na rast Lactococcus lactis. L. lactis pripada grupi bakterija mlečne kiseline (BMK) i ima veliku primenu u prehrambenoj industriji kao starter kultura. CmbT transporter je nedavno okarakterisan MDR protein soja L. lactis, koji doprinosi rezistenciji na različite toksične agense kao i na neke klinički značajne antibiotike. U ovom radu je cmbT gen višestruko eksprimiran u soju L. lactis NZ9000 dodavanjem nizina kao inducera. Povećana ekspresija cmbT gena je praćena metodom reverzne transkripcije (RT-PCR). Pokazano je da se nakon dodatka subinhibitornih koncentracija nizina u medijum za rast povećava količina sintetisane informacione RNK specifične za cmbT gen. Rast soja L. lactis NZ9000/pCT50, u kome je višestruko eksprimiran cmbT gen i L. lactis NZ9000 kontrolnog soja praćen je u bogatom i hemijski definisanom medijumu u prisustvu samo metionina (0.084 mM) ili kombinacije metionina i cisteina (8.4 mM i 8.2 mM). Praćene su krive rasta oba soja, a nakon izračunavanja odgovarajućih vremena generacije, rezultati su pokazali da L. lactis NZ9000/pCT50, brže raste u odnosu na kontrolni soj. Uočena razlika je najverovatnije posledica aktivnosti CmbT transportera koji doprinosi izbacivanju toksičnih agenasa iz ćelije i na taj način poboljšava adaptivne sposobnosti bakterije koja ga eksprimira i daje joj selektivnu prednost.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika, Belgrade
T1  - Over-expressed CmbT multidrug resistance transporter improves the fitness of Lactococcus lactis
T1  - Uticaj povećane ekspresije CmbT MDR transportera na rast Lactococcus lactis
VL  - 45
IS  - 1
SP  - 197
EP  - 206
DO  - 10.2298/GENSR1301197F
ER  - 

@article{
author = "Filipić, Brankica and Jovčić, Branko and Uzelac, Gordana and Miljković, Marija and Antić-Stanković, Jelena and Topisirović, Ljubiša and Golić, Nataša",
year = "2013",
abstract = "The influence of the over-expression of CmbT multidrug resistance transporter on the growth rate of Lactococcus lactis NZ9000 was studied. L. lactis is a lactic acid bacteria (LAB) widely used as a starter culture in dairy industry. Recently characterized CmbT MDR transporter in L. lactis confers resistance to a wide variety of toxic compounds as well as to some clinically relevant antibiotics. In this study, the cmbT gene was over-expressed in the strain L. lactis NZ9000 in the presence of nisin inducer. Over-expression of the cmbT gene in L. lactis NZ9000 was followed by RT-PCR. The obtained results showed that the cmbT gene was successfully over-expressed by addition of sub-inhibitory amounts of nisin. Growth curves of L. lactis NZ9000/pCT50 over-expressing the cmbT gene and L. lactis NZ9000 control strain were followed in the rich medium as well as in the chemically defined medium in the presence solely of methionine (0.084 mM) or mix of methionine and cysteine (8.4 mM and 8.2 mM, respectively). Resulting doubling times revealed that L. lactis NZ9000/pCT50 had higher growth rate comparing to the control strain. This could be a consequence of the CmbT efflux activity, which improves the fitness of the host bacterium through the elimination of toxic compounds from the cell., U ovom radu je izučavan uticaj povećane ekspresije cmbT gena, odgovornog za sintezu CmbT MDR transportera, na rast Lactococcus lactis. L. lactis pripada grupi bakterija mlečne kiseline (BMK) i ima veliku primenu u prehrambenoj industriji kao starter kultura. CmbT transporter je nedavno okarakterisan MDR protein soja L. lactis, koji doprinosi rezistenciji na različite toksične agense kao i na neke klinički značajne antibiotike. U ovom radu je cmbT gen višestruko eksprimiran u soju L. lactis NZ9000 dodavanjem nizina kao inducera. Povećana ekspresija cmbT gena je praćena metodom reverzne transkripcije (RT-PCR). Pokazano je da se nakon dodatka subinhibitornih koncentracija nizina u medijum za rast povećava količina sintetisane informacione RNK specifične za cmbT gen. Rast soja L. lactis NZ9000/pCT50, u kome je višestruko eksprimiran cmbT gen i L. lactis NZ9000 kontrolnog soja praćen je u bogatom i hemijski definisanom medijumu u prisustvu samo metionina (0.084 mM) ili kombinacije metionina i cisteina (8.4 mM i 8.2 mM). Praćene su krive rasta oba soja, a nakon izračunavanja odgovarajućih vremena generacije, rezultati su pokazali da L. lactis NZ9000/pCT50, brže raste u odnosu na kontrolni soj. Uočena razlika je najverovatnije posledica aktivnosti CmbT transportera koji doprinosi izbacivanju toksičnih agenasa iz ćelije i na taj način poboljšava adaptivne sposobnosti bakterije koja ga eksprimira i daje joj selektivnu prednost.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika, Belgrade",
title = "Over-expressed CmbT multidrug resistance transporter improves the fitness of Lactococcus lactis, Uticaj povećane ekspresije CmbT MDR transportera na rast Lactococcus lactis",
volume = "45",
number = "1",
pages = "197-206",
doi = "10.2298/GENSR1301197F"
}

Filipić, B., Jovčić, B., Uzelac, G., Miljković, M., Antić-Stanković, J., Topisirović, L.,& Golić, N.. (2013). Over-expressed CmbT multidrug resistance transporter improves the fitness of Lactococcus lactis. in Genetika, Belgrade
Društvo genetičara Srbije, Beograd., 45(1), 197-206.
https://doi.org/10.2298/GENSR1301197F

Filipić B, Jovčić B, Uzelac G, Miljković M, Antić-Stanković J, Topisirović L, Golić N. Over-expressed CmbT multidrug resistance transporter improves the fitness of Lactococcus lactis. in Genetika, Belgrade. 2013;45(1):197-206.
doi:10.2298/GENSR1301197F .

Filipić, Brankica, Jovčić, Branko, Uzelac, Gordana, Miljković, Marija, Antić-Stanković, Jelena, Topisirović, Ljubiša, Golić, Nataša, "Over-expressed CmbT multidrug resistance transporter improves the fitness of Lactococcus lactis" in Genetika, Belgrade, 45, no. 1 (2013):197-206,
https://doi.org/10.2298/GENSR1301197F . .

TY  - JOUR
AU  - Filipić, Brankica
AU  - Golić, Nataša
AU  - Jovčić, Branko
AU  - Tolinacki, Maja
AU  - Bay, Denice C.
AU  - Turner, Raymond J.
AU  - Antić-Stanković, Jelena
AU  - Kojić, Milan
AU  - Topisirović, Ljubiša
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1944
AB  - Functional characterization of the multidrug resistance CmbT transporter was performed in Lactococcus lactis. The cmbT gene is predicted to encode an efflux protein homologous to the multidrug resistance major facilitator superfamily. The cmbT gene (1377 bp) was cloned and overexpressed in L. lactis NZ9000. Results from cell growth studies revealed that the CmbT protein has an effect on host cell resistance to lincomycin, cholate, sulbactam, ethidium bromide, Hoechst 33342, sulfadiazine, streptomycin, rifampicin, puromycin and sulfametoxazole. Moreover, in vivo transport assays showed that overexpressed CmbT-mediated extrusion of ethidium bromide and Hoechst 33342 was higher than in the control L. lactis NZ9000 strain. CmbT-mediated extrusion of Hoechst 33342 was inhibited by the ionophores nigericin and valinomycin known to dissipate proton motive force. This indicates that CmbT-mediated extrusion is based on a drug-proton antiport mechanism. Taking together results obtained in this study, it can be concluded that CmbT is a novel major facilitator multidrug resistance transporter candidate in L. lactis, with a possible signaling role in sulfur metabolism.
PB  - Elsevier Science BV, Amsterdam
T2  - Research in Social & Administrative Pharmacy
T1  - The cmbT gene encodes a novel major facilitator multidrug resistance transporter in Lactococcus lactis
VL  - 164
IS  - 1
SP  - 46
EP  - 54
DO  - 10.1016/j.resmic.2012.09.003
ER  - 

@article{
author = "Filipić, Brankica and Golić, Nataša and Jovčić, Branko and Tolinacki, Maja and Bay, Denice C. and Turner, Raymond J. and Antić-Stanković, Jelena and Kojić, Milan and Topisirović, Ljubiša",
year = "2013",
abstract = "Functional characterization of the multidrug resistance CmbT transporter was performed in Lactococcus lactis. The cmbT gene is predicted to encode an efflux protein homologous to the multidrug resistance major facilitator superfamily. The cmbT gene (1377 bp) was cloned and overexpressed in L. lactis NZ9000. Results from cell growth studies revealed that the CmbT protein has an effect on host cell resistance to lincomycin, cholate, sulbactam, ethidium bromide, Hoechst 33342, sulfadiazine, streptomycin, rifampicin, puromycin and sulfametoxazole. Moreover, in vivo transport assays showed that overexpressed CmbT-mediated extrusion of ethidium bromide and Hoechst 33342 was higher than in the control L. lactis NZ9000 strain. CmbT-mediated extrusion of Hoechst 33342 was inhibited by the ionophores nigericin and valinomycin known to dissipate proton motive force. This indicates that CmbT-mediated extrusion is based on a drug-proton antiport mechanism. Taking together results obtained in this study, it can be concluded that CmbT is a novel major facilitator multidrug resistance transporter candidate in L. lactis, with a possible signaling role in sulfur metabolism.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Research in Social & Administrative Pharmacy",
title = "The cmbT gene encodes a novel major facilitator multidrug resistance transporter in Lactococcus lactis",
volume = "164",
number = "1",
pages = "46-54",
doi = "10.1016/j.resmic.2012.09.003"
}

Filipić, B., Golić, N., Jovčić, B., Tolinacki, M., Bay, D. C., Turner, R. J., Antić-Stanković, J., Kojić, M.,& Topisirović, L.. (2013). The cmbT gene encodes a novel major facilitator multidrug resistance transporter in Lactococcus lactis. in Research in Social & Administrative Pharmacy
Elsevier Science BV, Amsterdam., 164(1), 46-54.
https://doi.org/10.1016/j.resmic.2012.09.003

Filipić B, Golić N, Jovčić B, Tolinacki M, Bay DC, Turner RJ, Antić-Stanković J, Kojić M, Topisirović L. The cmbT gene encodes a novel major facilitator multidrug resistance transporter in Lactococcus lactis. in Research in Social & Administrative Pharmacy. 2013;164(1):46-54.
doi:10.1016/j.resmic.2012.09.003 .

Filipić, Brankica, Golić, Nataša, Jovčić, Branko, Tolinacki, Maja, Bay, Denice C., Turner, Raymond J., Antić-Stanković, Jelena, Kojić, Milan, Topisirović, Ljubiša, "The cmbT gene encodes a novel major facilitator multidrug resistance transporter in Lactococcus lactis" in Research in Social & Administrative Pharmacy, 164, no. 1 (2013):46-54,
https://doi.org/10.1016/j.resmic.2012.09.003 . .

TY  - JOUR
AU  - Lukić, Jovanka
AU  - Strahinić, Ivana
AU  - Jovčić, Branko
AU  - Filipić, Brankica
AU  - Topisirović, Ljubiša
AU  - Kojić, Milan
AU  - Begović, Jelena
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1629
AB  - Adhesion of bacteria to mucosal surfaces and epithelial cells is one of the key features for the selection of probiotics. In this study, we assessed the adhesion property of Lactococcus lactis subsp. lactis BGKP1 based on its strong autoaggregation phenotype and the presence of the mucin binding protein (MbpL). Genes involved in aggregation (aggL) and possible interaction with mucin (mbpL), present on the same plasmid pKP1, were previously separately cloned in the plasmid pAZIL. In vivo and in vitro experiments revealed potentially different physiological roles of these two proteins in the process of adherence to the intestine during the passage of the strain through the gastrointestinal tract. We correlated the in vitro and in vivo aggregation of the BGKP1-20 carrying plasmid with aggL to binding to the colonic mucus through nonspecific hydrophobic interactions. The expression of AggL on the bacterial cell surface significantly increased the hydrophobicity of the strain. On the other hand, the presence of AggL in the strain reduced its ability to adhere to the ileum. Moreover, MbpL protein showed an affinity to bind gastric type mucin proteins such as MUC5AC. This protein did not contribute to the binding of the strain to the ileal or colonic part of the intestine. Different potential functions of lactococcal AggL and MbpL proteins in the process of adhesion to the gastrointestinal tract are proposed.
PB  - Amer Soc Microbiology, Washington
T2  - Applied and Environmental Microbiology
T1  - Different Roles for Lactococcal Aggregation Factor and Mucin Binding Protein in Adhesion to Gastrointestinal Mucosa
VL  - 78
IS  - 22
SP  - 7993
EP  - 8000
DO  - 10.1128/AEM.02141-12
ER  - 

@article{
author = "Lukić, Jovanka and Strahinić, Ivana and Jovčić, Branko and Filipić, Brankica and Topisirović, Ljubiša and Kojić, Milan and Begović, Jelena",
year = "2012",
abstract = "Adhesion of bacteria to mucosal surfaces and epithelial cells is one of the key features for the selection of probiotics. In this study, we assessed the adhesion property of Lactococcus lactis subsp. lactis BGKP1 based on its strong autoaggregation phenotype and the presence of the mucin binding protein (MbpL). Genes involved in aggregation (aggL) and possible interaction with mucin (mbpL), present on the same plasmid pKP1, were previously separately cloned in the plasmid pAZIL. In vivo and in vitro experiments revealed potentially different physiological roles of these two proteins in the process of adherence to the intestine during the passage of the strain through the gastrointestinal tract. We correlated the in vitro and in vivo aggregation of the BGKP1-20 carrying plasmid with aggL to binding to the colonic mucus through nonspecific hydrophobic interactions. The expression of AggL on the bacterial cell surface significantly increased the hydrophobicity of the strain. On the other hand, the presence of AggL in the strain reduced its ability to adhere to the ileum. Moreover, MbpL protein showed an affinity to bind gastric type mucin proteins such as MUC5AC. This protein did not contribute to the binding of the strain to the ileal or colonic part of the intestine. Different potential functions of lactococcal AggL and MbpL proteins in the process of adhesion to the gastrointestinal tract are proposed.",
publisher = "Amer Soc Microbiology, Washington",
journal = "Applied and Environmental Microbiology",
title = "Different Roles for Lactococcal Aggregation Factor and Mucin Binding Protein in Adhesion to Gastrointestinal Mucosa",
volume = "78",
number = "22",
pages = "7993-8000",
doi = "10.1128/AEM.02141-12"
}

Lukić, J., Strahinić, I., Jovčić, B., Filipić, B., Topisirović, L., Kojić, M.,& Begović, J.. (2012). Different Roles for Lactococcal Aggregation Factor and Mucin Binding Protein in Adhesion to Gastrointestinal Mucosa. in Applied and Environmental Microbiology
Amer Soc Microbiology, Washington., 78(22), 7993-8000.
https://doi.org/10.1128/AEM.02141-12

Lukić J, Strahinić I, Jovčić B, Filipić B, Topisirović L, Kojić M, Begović J. Different Roles for Lactococcal Aggregation Factor and Mucin Binding Protein in Adhesion to Gastrointestinal Mucosa. in Applied and Environmental Microbiology. 2012;78(22):7993-8000.
doi:10.1128/AEM.02141-12 .

Lukić, Jovanka, Strahinić, Ivana, Jovčić, Branko, Filipić, Brankica, Topisirović, Ljubiša, Kojić, Milan, Begović, Jelena, "Different Roles for Lactococcal Aggregation Factor and Mucin Binding Protein in Adhesion to Gastrointestinal Mucosa" in Applied and Environmental Microbiology, 78, no. 22 (2012):7993-8000,
https://doi.org/10.1128/AEM.02141-12 . .