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

2014
Authors
Kovacević, JovanaTimić, Tamara

Tiruveedhula, Veera V.
Batinić, Bojan

Namjoshi, Ojas A.

Milić, Marija

Joksimović, Srđan

Cook, James M.

Savić, Miroslav

Article (Published version)

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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-adm...inistration 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.
Keywords:
Benzodiazepines / Elevated plus maze / Pentylenetetrazole test / Physical dependenceSource:
Brain Research Bulletin, 2014, 104, 1-6Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
DOI: 10.1016/j.brainresbull.2014.03.002
ISSN: 0361-9230
PubMed: 24695241
WoS: 000337875300001
Scopus: 2-s2.0-84898864077
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Institution/Community
PharmacyTY - 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 . .