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Combining in vivo pathohistological and redox status analysis with in silico toxicogenomic study to explore the phthalates and bisphenol A mixture-induced testicular toxicity

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2021
Authors
Baralić, Katarina
Jorgovanović, Dragica
Živančević, Katarina
Buha-Đjorđević, Aleksandra
Antonijević-Miljaković, Evica
Miljković, Milica
Kotur-Stevuljević, Jelena
Antonijević, Biljana
Đukić-Ćosić, Danijela
Article (Published version)
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Abstract
The aim of this study was to: (i) determine and compare the capacity of bis (2 –ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), bisphenol A (BPA), and their mixture to produce testicular toxicity after the subacute exposure; (ii) explore the mechanisms behind the observed changes using in silico toxicogenomic approach. Male rats were randomly split into groups (n = 6): (1) Control (corn oil); (2) DEHP (50 mg/kg b.w./day); (3) DBP (50 mg/kg b.w./day); (4) BPA (25 mg/kg b.w./day); and (5) MIX (50 mg/kg b.w./day DEHP + 50 mg/kg b.w/day DBP + 25 mg/kg b.w./day BPA). Animals were sacrificed after 28 days of oral exposure, testes were extracted and prepared for histological assessments under the light microscope (haematoxylin and eosin staining) and redox status analysis. The Comparative Toxicogenomics Database (CTD; http://CTD.mdibl.org), Cytoscape software (https://cytoscape.org) and ToppGene Suite (https://toppgene.cchmc.org) were used for data-mining. Present pathohistological stu...dy has demonstrated more pronounced testicular toxicity of the MIX group (desquamated germinal epithelium cells, enlarged cells with hyperchromatic nuclei, multinucleated cell forms and intracytoplasmic vacuoles) in comparison with the single substances, while effects on redox status parameters were either more prominent, or present only in the MIX group. In silico investigation revealed 20 genes linked to male reproductive disorders, affected by all three investigated substances. Effects on metabolism, AhR pathway, apoptosis and oxidative stress could be singled out as the most probable mechanisms involved in the subacute DEHP, DBP and BPA mixture testicular toxicity, while the effect on oxidative stress parameters was confirmed by in vivo experiment.

Keywords:
Rats / Endocrine disruptors / Testicular toxicity / Toxicogenomic data-mining
Source:
Chemosphere, 2021, 267
Publisher:
  • Elsevier Ltd
Projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200161 (University of Belgrade, Faculty of Pharmacy) (RS-200161)

DOI: 10.1016/j.chemosphere.2020.129296

ISSN: 0045-6535

Scopus: 2-s2.0-85097792213
[ Google Scholar ]
URI
https://farfar.pharmacy.bg.ac.rs/handle/123456789/3762
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  • Radovi istraživača / Researchers’ publications
Institution
Pharmacy

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