Tiruveedhula, Veera V.

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  • Tiruveedhula, Veera V. (3)
  • Tiruveedhula, Veera (1)
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Author's Bibliography

Metabolism, pharmacokinetics, and anticonvulsant activity of a deuterated analog of the α2/3-selective GABAkine KRM-II-81

Golani, Lalit; Divović, Branka; Sharmin, Dishary; Pandey, Kamal; Mian, Md Yeunus; Cerne, Rok; Zahn, Nicolas; Meyer, Michelle; Tiruveedhula, Veera; Smith, Jodi; Ping, Xingjie; Jin, Xiaoming; Lippa, Arnold; Schkeryantz, Jeffrey; Arnold, Leggy; Cook, James; Savić, Miroslav; Witkin, Jeffrey

(John Wiley and Sons Ltd, 2022)

TY  - JOUR
AU  - Golani, Lalit
AU  - Divović, Branka
AU  - Sharmin, Dishary
AU  - Pandey, Kamal
AU  - Mian, Md Yeunus
AU  - Cerne, Rok
AU  - Zahn, Nicolas
AU  - Meyer, Michelle
AU  - Tiruveedhula, Veera
AU  - Smith, Jodi
AU  - Ping, Xingjie
AU  - Jin, Xiaoming
AU  - Lippa, Arnold
AU  - Schkeryantz, Jeffrey
AU  - Arnold, Leggy
AU  - Cook, James
AU  - Savić, Miroslav
AU  - Witkin, Jeffrey
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4108
AB  - The imidazodiazepine, (5‐(8‐ethynyl‐6‐(pyridin‐2‐yl)‐4H‐benzo [f]imidazole[1,5‐α] [1,4]diazepin‐3‐yl) oxazole or KRM‐II‐81) is a new α2/3‐selective GABAkine (gamma aminobutyric acid A receptor potentiator) with anticonvulsant, anxiolytic, and antinociceptive activity in preclinical models. Reducing metabolism was utilized as a means of potentially extending the half‐life of KRM‐II‐81. In vitro and in vivo studies were conducted to evaluate metabolic liabilities. Incubation of KRM‐II‐81 in hepatocytes revealed sites of potential metabolism on the oxazole and the diazepine rings. These sites were targeted in the design of a deuterated analog (D5‐KRM‐II‐ 81) that could be evaluated as a potentially longer‐acting analog. In contrast to computer predictions, peak plasma concentrations of D5‐KRM‐II‐81 in rats were not significantly greater than those produced by KRM‐II‐81 after oral administra- tion. Furthermore, brain disposition of KRM‐II‐81 was higher than that of D5‐KRM‐ II‐81. The half‐life of the two compounds in either plasma or brain did not statis- tically differ from one another but the tmax for D5‐KRM‐II‐81 occurred slightly earlier than for KRM‐II‐81. Non‐metabolic considerations might be relevant to the lack of increases in exposure by D5‐KRM‐II‐81. Alternative sites of metabolism on KRM‐II‐81, not targeted by the current deuteration process, are also possible. Despite its lack of augmented exposure, D5‐KRM‐II‐81, like KRM‐II‐81, significantly prevented seizures induced by pentylenetetrazol when given orally. The present findings introduce a new orally active anticonvulsant GABAkine, D5‐KRM‐II‐81.
PB  - John Wiley and Sons Ltd
T2  - Biopharmaceutics and Drug Disposition
T1  - Metabolism, pharmacokinetics, and anticonvulsant activity of a deuterated analog of the α2/3-selective GABAkine KRM-II-81
VL  - 43
IS  - 2
SP  - 66
EP  - 75
DO  - 10.1002/bdd.2313
ER  - 
@article{
author = "Golani, Lalit and Divović, Branka and Sharmin, Dishary and Pandey, Kamal and Mian, Md Yeunus and Cerne, Rok and Zahn, Nicolas and Meyer, Michelle and Tiruveedhula, Veera and Smith, Jodi and Ping, Xingjie and Jin, Xiaoming and Lippa, Arnold and Schkeryantz, Jeffrey and Arnold, Leggy and Cook, James and Savić, Miroslav and Witkin, Jeffrey",
year = "2022",
abstract = "The imidazodiazepine, (5‐(8‐ethynyl‐6‐(pyridin‐2‐yl)‐4H‐benzo [f]imidazole[1,5‐α] [1,4]diazepin‐3‐yl) oxazole or KRM‐II‐81) is a new α2/3‐selective GABAkine (gamma aminobutyric acid A receptor potentiator) with anticonvulsant, anxiolytic, and antinociceptive activity in preclinical models. Reducing metabolism was utilized as a means of potentially extending the half‐life of KRM‐II‐81. In vitro and in vivo studies were conducted to evaluate metabolic liabilities. Incubation of KRM‐II‐81 in hepatocytes revealed sites of potential metabolism on the oxazole and the diazepine rings. These sites were targeted in the design of a deuterated analog (D5‐KRM‐II‐ 81) that could be evaluated as a potentially longer‐acting analog. In contrast to computer predictions, peak plasma concentrations of D5‐KRM‐II‐81 in rats were not significantly greater than those produced by KRM‐II‐81 after oral administra- tion. Furthermore, brain disposition of KRM‐II‐81 was higher than that of D5‐KRM‐ II‐81. The half‐life of the two compounds in either plasma or brain did not statis- tically differ from one another but the tmax for D5‐KRM‐II‐81 occurred slightly earlier than for KRM‐II‐81. Non‐metabolic considerations might be relevant to the lack of increases in exposure by D5‐KRM‐II‐81. Alternative sites of metabolism on KRM‐II‐81, not targeted by the current deuteration process, are also possible. Despite its lack of augmented exposure, D5‐KRM‐II‐81, like KRM‐II‐81, significantly prevented seizures induced by pentylenetetrazol when given orally. The present findings introduce a new orally active anticonvulsant GABAkine, D5‐KRM‐II‐81.",
publisher = "John Wiley and Sons Ltd",
journal = "Biopharmaceutics and Drug Disposition",
title = "Metabolism, pharmacokinetics, and anticonvulsant activity of a deuterated analog of the α2/3-selective GABAkine KRM-II-81",
volume = "43",
number = "2",
pages = "66-75",
doi = "10.1002/bdd.2313"
}
Golani, L., Divović, B., Sharmin, D., Pandey, K., Mian, M. Y., Cerne, R., Zahn, N., Meyer, M., Tiruveedhula, V., Smith, J., Ping, X., Jin, X., Lippa, A., Schkeryantz, J., Arnold, L., Cook, J., Savić, M.,& Witkin, J.. (2022). Metabolism, pharmacokinetics, and anticonvulsant activity of a deuterated analog of the α2/3-selective GABAkine KRM-II-81. in Biopharmaceutics and Drug Disposition
John Wiley and Sons Ltd., 43(2), 66-75.
https://doi.org/10.1002/bdd.2313
Golani L, Divović B, Sharmin D, Pandey K, Mian MY, Cerne R, Zahn N, Meyer M, Tiruveedhula V, Smith J, Ping X, Jin X, Lippa A, Schkeryantz J, Arnold L, Cook J, Savić M, Witkin J. Metabolism, pharmacokinetics, and anticonvulsant activity of a deuterated analog of the α2/3-selective GABAkine KRM-II-81. in Biopharmaceutics and Drug Disposition. 2022;43(2):66-75.
doi:10.1002/bdd.2313 .
Golani, Lalit, Divović, Branka, Sharmin, Dishary, Pandey, Kamal, Mian, Md Yeunus, Cerne, Rok, Zahn, Nicolas, Meyer, Michelle, Tiruveedhula, Veera, Smith, Jodi, Ping, Xingjie, Jin, Xiaoming, Lippa, Arnold, Schkeryantz, Jeffrey, Arnold, Leggy, Cook, James, Savić, Miroslav, Witkin, Jeffrey, "Metabolism, pharmacokinetics, and anticonvulsant activity of a deuterated analog of the α2/3-selective GABAkine KRM-II-81" in Biopharmaceutics and Drug Disposition, 43, no. 2 (2022):66-75,
https://doi.org/10.1002/bdd.2313 . .
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Attaining in vivo selectivity of positive modulation of alpha 3 ss gamma 2 GABA(A) receptors in rats: A hard task!

Batinić, Bojan; Stanković, Tamara; Stephen, Michael; Kodali, Revathi; Tiruveedhula, Veera V.; Li, Guanguan; Scholze, Petra; Marković, Bojan; Obradović, Aleksandar; Ernst, Margot; Cook, James M.; Savić, Miroslav

(Elsevier Science BV, Amsterdam, 2018)

TY  - JOUR
AU  - Batinić, Bojan
AU  - Stanković, Tamara
AU  - Stephen, Michael
AU  - Kodali, Revathi
AU  - Tiruveedhula, Veera V.
AU  - Li, Guanguan
AU  - Scholze, Petra
AU  - Marković, Bojan
AU  - Obradović, Aleksandar
AU  - Ernst, Margot
AU  - Cook, James M.
AU  - Savić, Miroslav
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3070
AB  - It is unclear whether GABA(A) receptors (GABA(A)Rs) that contain the alpha 3-subunit are substantially involved in the anxiolytic effects of benzodiazepines (BDZs). In the present study, we tested YT-III-31, a newer BDZ ligand with functional preference for alpha 3 ss gamma 2 GABA(A) Rs, in two paradigms of unconditioned anxiety, the open field and elevated plus maze in rats. The effective dose of YT-III-31 (2 mg/kg) displayed a clear anxiolytic-like profile, unhampered by sedative action, in both tests. At a higher dose (10 mg/kg), YT-III-31 induced ataxia in the rotarod and sedation in spontaneous locomotor activity test. The latter effect was preventable by flumazenil and ss CCt, the non-selective and alpha 1 ss gamma 2 GABA(A)R affinity-selective antagonist, respectively, demonstrating that sedative properties of YT-III-31, when attained, are mediated by the alpha 1 gamma 2 site. To elucidate the receptor substrate of subtle behavioral differences between YT-III-31 and diazepam, we approximated in vivo receptor potentiation for both ligands, based on estimated unbound concentrations in rat brains. Far different from diazepam, YT-III-31 has significantly lower affinity for the alpha 1 gamma 2 over other BDZ-sensitive sites, and at lower doses (1-2 mg/kg) was devoid of potentiation at alpha 1 ss gamma 2 GABA(A)Rs. The approximation approach revealed a modest selectivity of YT-III-31 for alpha 3 gamma 2- in comparison to alpha 2 gamma 2 and alpha 5 gamma 2 binding sites, suggesting that its anxiolytic-like activity may not necessarily or predominantly reflect potentiation at alpha 3 ss gamma 2 GABA(A)Rs. Nonetheless, as the anxiolytic effects are achievable at a dose devoid of any sedative potential, and having favorable safety (cytotoxicity) and metabolic stability profile, YT-III-31 represents a valuable candidate for further translational research.
PB  - Elsevier Science BV, Amsterdam
T2  - European Neuropsychopharmacology
T1  - Attaining in vivo selectivity of positive modulation of alpha 3 ss gamma 2 GABA(A) receptors in rats: A hard task!
VL  - 28
IS  - 8
SP  - 903
EP  - 914
DO  - 10.1016/j.euroneuro.2018.05.014
ER  - 
@article{
author = "Batinić, Bojan and Stanković, Tamara and Stephen, Michael and Kodali, Revathi and Tiruveedhula, Veera V. and Li, Guanguan and Scholze, Petra and Marković, Bojan and Obradović, Aleksandar and Ernst, Margot and Cook, James M. and Savić, Miroslav",
year = "2018",
abstract = "It is unclear whether GABA(A) receptors (GABA(A)Rs) that contain the alpha 3-subunit are substantially involved in the anxiolytic effects of benzodiazepines (BDZs). In the present study, we tested YT-III-31, a newer BDZ ligand with functional preference for alpha 3 ss gamma 2 GABA(A) Rs, in two paradigms of unconditioned anxiety, the open field and elevated plus maze in rats. The effective dose of YT-III-31 (2 mg/kg) displayed a clear anxiolytic-like profile, unhampered by sedative action, in both tests. At a higher dose (10 mg/kg), YT-III-31 induced ataxia in the rotarod and sedation in spontaneous locomotor activity test. The latter effect was preventable by flumazenil and ss CCt, the non-selective and alpha 1 ss gamma 2 GABA(A)R affinity-selective antagonist, respectively, demonstrating that sedative properties of YT-III-31, when attained, are mediated by the alpha 1 gamma 2 site. To elucidate the receptor substrate of subtle behavioral differences between YT-III-31 and diazepam, we approximated in vivo receptor potentiation for both ligands, based on estimated unbound concentrations in rat brains. Far different from diazepam, YT-III-31 has significantly lower affinity for the alpha 1 gamma 2 over other BDZ-sensitive sites, and at lower doses (1-2 mg/kg) was devoid of potentiation at alpha 1 ss gamma 2 GABA(A)Rs. The approximation approach revealed a modest selectivity of YT-III-31 for alpha 3 gamma 2- in comparison to alpha 2 gamma 2 and alpha 5 gamma 2 binding sites, suggesting that its anxiolytic-like activity may not necessarily or predominantly reflect potentiation at alpha 3 ss gamma 2 GABA(A)Rs. Nonetheless, as the anxiolytic effects are achievable at a dose devoid of any sedative potential, and having favorable safety (cytotoxicity) and metabolic stability profile, YT-III-31 represents a valuable candidate for further translational research.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "European Neuropsychopharmacology",
title = "Attaining in vivo selectivity of positive modulation of alpha 3 ss gamma 2 GABA(A) receptors in rats: A hard task!",
volume = "28",
number = "8",
pages = "903-914",
doi = "10.1016/j.euroneuro.2018.05.014"
}
Batinić, B., Stanković, T., Stephen, M., Kodali, R., Tiruveedhula, V. V., Li, G., Scholze, P., Marković, B., Obradović, A., Ernst, M., Cook, J. M.,& Savić, M.. (2018). Attaining in vivo selectivity of positive modulation of alpha 3 ss gamma 2 GABA(A) receptors in rats: A hard task!. in European Neuropsychopharmacology
Elsevier Science BV, Amsterdam., 28(8), 903-914.
https://doi.org/10.1016/j.euroneuro.2018.05.014
Batinić B, Stanković T, Stephen M, Kodali R, Tiruveedhula VV, Li G, Scholze P, Marković B, Obradović A, Ernst M, Cook JM, Savić M. Attaining in vivo selectivity of positive modulation of alpha 3 ss gamma 2 GABA(A) receptors in rats: A hard task!. in European Neuropsychopharmacology. 2018;28(8):903-914.
doi:10.1016/j.euroneuro.2018.05.014 .
Batinić, Bojan, Stanković, Tamara, Stephen, Michael, Kodali, Revathi, Tiruveedhula, Veera V., Li, Guanguan, Scholze, Petra, Marković, Bojan, Obradović, Aleksandar, Ernst, Margot, Cook, James M., Savić, Miroslav, "Attaining in vivo selectivity of positive modulation of alpha 3 ss gamma 2 GABA(A) receptors in rats: A hard task!" in European Neuropsychopharmacology, 28, no. 8 (2018):903-914,
https://doi.org/10.1016/j.euroneuro.2018.05.014 . .
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Duration of treatment and activation of alpha(1)-containing GABA(A) receptors variably affect the level of anxiety and seizure susceptibility after diazepam withdrawal in rats

Kovacević, Jovana; Timić, Tamara; Tiruveedhula, Veera V.; Batinić, Bojan; Namjoshi, Ojas A.; Milić, Marija; Joksimović, Srđan; Cook, James M.; Savić, Miroslav

(Pergamon-Elsevier Science Ltd, Oxford, 2014)

TY  - JOUR
AU  - Kovacević, Jovana
AU  - Timić, Tamara
AU  - Tiruveedhula, Veera V.
AU  - Batinić, Bojan
AU  - Namjoshi, Ojas A.
AU  - Milić, Marija
AU  - Joksimović, Srđan
AU  - Cook, James M.
AU  - Savić, Miroslav
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2205
AB  - Long-term use of benzodiazepine-type drugs may lead to physical dependence, manifested by withdrawal syndrome after abrupt cessation of treatment. The aim of the present study was to investigate the influence of duration of treatment, as well as the role of alpha(1)-containing GABA(A) receptors, in development of physical dependence to diazepam, assessed through the level of anxiety and susceptibility to pentylenetetrazole (PTZ)-induced seizures, 24 h after withdrawal from protracted treatment in rats. Withdrawal of 2 mg/kg diazepam after 28, but not after 14 or 21 days of administration led to an anxiety-like behavior in the elevated plus maze. Antagonism of the diazepam effects at alpha(1)-containing GABA(A) receptors, achieved by daily administration of the neutral modulator beta CCt (5 mg/kg), did not affect the anxiety level during withdrawal. An increased susceptibility to PTZ-induced seizures was observed during diazepam withdrawal after 21 and 28 days of treatment. Daily co-administration of beta CCt further decreased the PTZ-seizure threshold after 21 days of treatment, whilst it prevented the diazepam withdrawal-elicited decrease of the PTZ threshold after 28 days of treatment. In conclusion, the current study suggests that the role of alpha(1)-containing GABA(A) receptors in mediating the development of physical dependence may vary based on the effect being studied and duration of protracted treatment. Moreover, the present data supports previous findings that the lack of activity at alpha(1)-containing GABA(A) receptors is not sufficient to eliminate physical dependence liability of ligands of the benzodiazepine type.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Brain Research Bulletin
T1  - Duration of treatment and activation of alpha(1)-containing GABA(A) receptors variably affect the level of anxiety and seizure susceptibility after diazepam withdrawal in rats
VL  - 104
SP  - 1
EP  - 6
DO  - 10.1016/j.brainresbull.2014.03.002
ER  - 
@article{
author = "Kovacević, Jovana and Timić, Tamara and Tiruveedhula, Veera V. and Batinić, Bojan and Namjoshi, Ojas A. and Milić, Marija and Joksimović, Srđan and Cook, James M. and Savić, Miroslav",
year = "2014",
abstract = "Long-term use of benzodiazepine-type drugs may lead to physical dependence, manifested by withdrawal syndrome after abrupt cessation of treatment. The aim of the present study was to investigate the influence of duration of treatment, as well as the role of alpha(1)-containing GABA(A) receptors, in development of physical dependence to diazepam, assessed through the level of anxiety and susceptibility to pentylenetetrazole (PTZ)-induced seizures, 24 h after withdrawal from protracted treatment in rats. Withdrawal of 2 mg/kg diazepam after 28, but not after 14 or 21 days of administration led to an anxiety-like behavior in the elevated plus maze. Antagonism of the diazepam effects at alpha(1)-containing GABA(A) receptors, achieved by daily administration of the neutral modulator beta CCt (5 mg/kg), did not affect the anxiety level during withdrawal. An increased susceptibility to PTZ-induced seizures was observed during diazepam withdrawal after 21 and 28 days of treatment. Daily co-administration of beta CCt further decreased the PTZ-seizure threshold after 21 days of treatment, whilst it prevented the diazepam withdrawal-elicited decrease of the PTZ threshold after 28 days of treatment. In conclusion, the current study suggests that the role of alpha(1)-containing GABA(A) receptors in mediating the development of physical dependence may vary based on the effect being studied and duration of protracted treatment. Moreover, the present data supports previous findings that the lack of activity at alpha(1)-containing GABA(A) receptors is not sufficient to eliminate physical dependence liability of ligands of the benzodiazepine type.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Brain Research Bulletin",
title = "Duration of treatment and activation of alpha(1)-containing GABA(A) receptors variably affect the level of anxiety and seizure susceptibility after diazepam withdrawal in rats",
volume = "104",
pages = "1-6",
doi = "10.1016/j.brainresbull.2014.03.002"
}
Kovacević, J., Timić, T., Tiruveedhula, V. V., Batinić, B., Namjoshi, O. A., Milić, M., Joksimović, S., Cook, J. M.,& Savić, M.. (2014). Duration of treatment and activation of alpha(1)-containing GABA(A) receptors variably affect the level of anxiety and seizure susceptibility after diazepam withdrawal in rats. in Brain Research Bulletin
Pergamon-Elsevier Science Ltd, Oxford., 104, 1-6.
https://doi.org/10.1016/j.brainresbull.2014.03.002
Kovacević J, Timić T, Tiruveedhula VV, Batinić B, Namjoshi OA, Milić M, Joksimović S, Cook JM, Savić M. Duration of treatment and activation of alpha(1)-containing GABA(A) receptors variably affect the level of anxiety and seizure susceptibility after diazepam withdrawal in rats. in Brain Research Bulletin. 2014;104:1-6.
doi:10.1016/j.brainresbull.2014.03.002 .
Kovacević, Jovana, Timić, Tamara, Tiruveedhula, Veera V., Batinić, Bojan, Namjoshi, Ojas A., Milić, Marija, Joksimović, Srđan, Cook, James M., Savić, Miroslav, "Duration of treatment and activation of alpha(1)-containing GABA(A) receptors variably affect the level of anxiety and seizure susceptibility after diazepam withdrawal in rats" in Brain Research Bulletin, 104 (2014):1-6,
https://doi.org/10.1016/j.brainresbull.2014.03.002 . .
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βCCT, an antagonist selective for α1GABAA receptors, reverses diazepam withdrawal-induced anxiety in rats

Divljaković, Jovana; Milić, Marija; Namjoshi, Ojas A.; Tiruveedhula, Veera V.; Timić, Tamara; Cook, James M.; Savić, Miroslav

(Pergamon-Elsevier Science Ltd, Oxford, 2013)

TY  - JOUR
AU  - Divljaković, Jovana
AU  - Milić, Marija
AU  - Namjoshi, Ojas A.
AU  - Tiruveedhula, Veera V.
AU  - Timić, Tamara
AU  - Cook, James M.
AU  - Savić, Miroslav
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1931
AB  - The abrupt discontinuation of prolonged benzodiazepine treatment elicits a withdrawal syndrome with increased anxiety as a major symptom. The neural mechanisms underlying benzodiazepine physical dependence are still insufficiently understood. Flumazenil, the non-selective antagonist of the benzodiazepine binding site of GABA(A) receptors was capable of preventing and reversing the increased anxiety during benzodiazepine withdrawal in animals and humans in some, but not all studies. On the other hand, a number of data suggest that GABA(A) receptors containing alpha(1) subunits are critically involved in processes developing during prolonged use of benzodiazepines, such are tolerance to sedative effects, liability to physical dependence and addiction. Hence, we investigated in the elevated plus maze the level of anxiety 24 h following 21 days of diazepam treatment and the influence of flumazenil or a preferential alpha(1)-subunit selective antagonist beta CCt on diazepam withdrawal syndrome in rats. Abrupt cessation of protracted once-daily intraperitoneal administration of 2 mg/kg diazepam induced a withdrawal syndrome, measured by increased anxiety-like behavior in the elevated plus maze 24 h after treatment cessation. Acute challenge with either flumazenil (10 mg/kg) or beta CCt (1.25, 5 and 20 mg/kg) alleviated the diazepam withdrawal-induced anxiety. Moreover, both antagonists induced an anxiolytic-like response close, though not identical, to that seen with acute administration of diazepam. These findings imply that the mechanism by which antagonism at GABA(A) receptors may reverse the withdrawal-induced anxiety involves the alpha(1) subunit and prompt further studies aimed at linking the changes in behavior with possible adaptive changes in subunit expression and function of GABA(A) receptors.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Brain Research Bulletin
T1  - βCCT, an antagonist selective for α1GABAA receptors, reverses diazepam withdrawal-induced anxiety in rats
VL  - 91
SP  - 1
EP  - 7
DO  - 10.1016/j.brainresbull.2012.10.011
ER  - 
@article{
author = "Divljaković, Jovana and Milić, Marija and Namjoshi, Ojas A. and Tiruveedhula, Veera V. and Timić, Tamara and Cook, James M. and Savić, Miroslav",
year = "2013",
abstract = "The abrupt discontinuation of prolonged benzodiazepine treatment elicits a withdrawal syndrome with increased anxiety as a major symptom. The neural mechanisms underlying benzodiazepine physical dependence are still insufficiently understood. Flumazenil, the non-selective antagonist of the benzodiazepine binding site of GABA(A) receptors was capable of preventing and reversing the increased anxiety during benzodiazepine withdrawal in animals and humans in some, but not all studies. On the other hand, a number of data suggest that GABA(A) receptors containing alpha(1) subunits are critically involved in processes developing during prolonged use of benzodiazepines, such are tolerance to sedative effects, liability to physical dependence and addiction. Hence, we investigated in the elevated plus maze the level of anxiety 24 h following 21 days of diazepam treatment and the influence of flumazenil or a preferential alpha(1)-subunit selective antagonist beta CCt on diazepam withdrawal syndrome in rats. Abrupt cessation of protracted once-daily intraperitoneal administration of 2 mg/kg diazepam induced a withdrawal syndrome, measured by increased anxiety-like behavior in the elevated plus maze 24 h after treatment cessation. Acute challenge with either flumazenil (10 mg/kg) or beta CCt (1.25, 5 and 20 mg/kg) alleviated the diazepam withdrawal-induced anxiety. Moreover, both antagonists induced an anxiolytic-like response close, though not identical, to that seen with acute administration of diazepam. These findings imply that the mechanism by which antagonism at GABA(A) receptors may reverse the withdrawal-induced anxiety involves the alpha(1) subunit and prompt further studies aimed at linking the changes in behavior with possible adaptive changes in subunit expression and function of GABA(A) receptors.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Brain Research Bulletin",
title = "βCCT, an antagonist selective for α1GABAA receptors, reverses diazepam withdrawal-induced anxiety in rats",
volume = "91",
pages = "1-7",
doi = "10.1016/j.brainresbull.2012.10.011"
}
Divljaković, J., Milić, M., Namjoshi, O. A., Tiruveedhula, V. V., Timić, T., Cook, J. M.,& Savić, M.. (2013). βCCT, an antagonist selective for α1GABAA receptors, reverses diazepam withdrawal-induced anxiety in rats. in Brain Research Bulletin
Pergamon-Elsevier Science Ltd, Oxford., 91, 1-7.
https://doi.org/10.1016/j.brainresbull.2012.10.011
Divljaković J, Milić M, Namjoshi OA, Tiruveedhula VV, Timić T, Cook JM, Savić M. βCCT, an antagonist selective for α1GABAA receptors, reverses diazepam withdrawal-induced anxiety in rats. in Brain Research Bulletin. 2013;91:1-7.
doi:10.1016/j.brainresbull.2012.10.011 .
Divljaković, Jovana, Milić, Marija, Namjoshi, Ojas A., Tiruveedhula, Veera V., Timić, Tamara, Cook, James M., Savić, Miroslav, "βCCT, an antagonist selective for α1GABAA receptors, reverses diazepam withdrawal-induced anxiety in rats" in Brain Research Bulletin, 91 (2013):1-7,
https://doi.org/10.1016/j.brainresbull.2012.10.011 . .
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