PWZ-029, a compound with moderate inverse agonist functional selectivity at GABA(A) receptors containing alpha 5 subunits, improves passive, but not active, avoidance learning in rats
2008
Аутори
Savić, MiroslavClayton, Terry
Furtmueller, Roman
Gaurilović, Ivana
Samardžić, Janko
Savić, Snežana
Huck, Sigismund
Sieghart, Werner
Cook, James M.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Benzodiazepine (BZ) site ligands affect vigilance, anxiety, memory processes, muscle tone and epileptogenic propensity through modulation of neurotransmission at GABA(A) receptors containing alpha 1, alpha 2, alpha 3 or alpha 5 subunits, and may have numerous experimental and clinical applications. The ability of non-selective BZ site inverse agonists to enhance cognition, documented in animal models and human studies, is clinically not feasible due to potentially unacceptable psychomotor effects. Most investigations to date have proposed the alpha 1 and/or alpha 5 subunit-containing GABA(A) receptors as comprising the memory-modulating population of these receptors. The novel ligand PWZ-029, which we synthesized and characterized electrophysiologically, possesses in vitro binding selectivity and moderate inverse agonist functional selectivity at alpha 5-containing GABA(A) receptors. This ligand has also been examined in rats in the passive and active avoidance, spontaneous locomotor a...ctivity, elevated plus maze and grip strength tests, primarily predictive of the effects on the memory acquisition, basal locomotor activity, anxiety level and muscle tone, respectively. The improvement of task learning was detected at the dose of 5 mg/kg in the passive, but not active avoidance test. The inverse agonist PWZ-029 had no effect on anxiety or muscle tone, whereas at higher doses (10 and 20 mg/kg) it decreased locomotor activity. This effect was antagonized by flumazenil. and also by the lower (but not the higher) dose of an agonist (SH-053-R-CH3-2'F) selective for GABA(A) receptors containing the alpha 5 subunit. The hypolocomotor effect of PWZ-029 was not antagonized by the antagonist beta-CCt exhibiting a preferential affinity for alpha 1-subunit-containing receptors. These data suggest that moderate negative modulation at GABA(A) receptors containing the alpha 5 subunit is a sufficient condition for eliciting enhanced encoding/consolidation of declarative memory, while the influence of higher doses of modulators at these receptors on motor activity shows an intricate pattern whose relevance and mechanism await to be defined.
Кључне речи:
GABA(A) / inverse agonist / memory / locomotor activity / subtype-selectivityИзвор:
Brain Research, 2008, 1208, 150-159Издавач:
- Elsevier Science BV, Amsterdam
Финансирање / пројекти:
- NIMH NIH HHS 46851
DOI: 10.1016/j.brainres.2008.02.020
ISSN: 0006-8993
PubMed: 18394590
WoS: 000256937800018
Scopus: 2-s2.0-43049159557
Институција/група
PharmacyTY - JOUR AU - Savić, Miroslav AU - Clayton, Terry AU - Furtmueller, Roman AU - Gaurilović, Ivana AU - Samardžić, Janko AU - Savić, Snežana AU - Huck, Sigismund AU - Sieghart, Werner AU - Cook, James M. PY - 2008 UR - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1081 AB - Benzodiazepine (BZ) site ligands affect vigilance, anxiety, memory processes, muscle tone and epileptogenic propensity through modulation of neurotransmission at GABA(A) receptors containing alpha 1, alpha 2, alpha 3 or alpha 5 subunits, and may have numerous experimental and clinical applications. The ability of non-selective BZ site inverse agonists to enhance cognition, documented in animal models and human studies, is clinically not feasible due to potentially unacceptable psychomotor effects. Most investigations to date have proposed the alpha 1 and/or alpha 5 subunit-containing GABA(A) receptors as comprising the memory-modulating population of these receptors. The novel ligand PWZ-029, which we synthesized and characterized electrophysiologically, possesses in vitro binding selectivity and moderate inverse agonist functional selectivity at alpha 5-containing GABA(A) receptors. This ligand has also been examined in rats in the passive and active avoidance, spontaneous locomotor activity, elevated plus maze and grip strength tests, primarily predictive of the effects on the memory acquisition, basal locomotor activity, anxiety level and muscle tone, respectively. The improvement of task learning was detected at the dose of 5 mg/kg in the passive, but not active avoidance test. The inverse agonist PWZ-029 had no effect on anxiety or muscle tone, whereas at higher doses (10 and 20 mg/kg) it decreased locomotor activity. This effect was antagonized by flumazenil. and also by the lower (but not the higher) dose of an agonist (SH-053-R-CH3-2'F) selective for GABA(A) receptors containing the alpha 5 subunit. The hypolocomotor effect of PWZ-029 was not antagonized by the antagonist beta-CCt exhibiting a preferential affinity for alpha 1-subunit-containing receptors. These data suggest that moderate negative modulation at GABA(A) receptors containing the alpha 5 subunit is a sufficient condition for eliciting enhanced encoding/consolidation of declarative memory, while the influence of higher doses of modulators at these receptors on motor activity shows an intricate pattern whose relevance and mechanism await to be defined. PB - Elsevier Science BV, Amsterdam T2 - Brain Research T1 - PWZ-029, a compound with moderate inverse agonist functional selectivity at GABA(A) receptors containing alpha 5 subunits, improves passive, but not active, avoidance learning in rats VL - 1208 SP - 150 EP - 159 DO - 10.1016/j.brainres.2008.02.020 ER -
@article{ author = "Savić, Miroslav and Clayton, Terry and Furtmueller, Roman and Gaurilović, Ivana and Samardžić, Janko and Savić, Snežana and Huck, Sigismund and Sieghart, Werner and Cook, James M.", year = "2008", abstract = "Benzodiazepine (BZ) site ligands affect vigilance, anxiety, memory processes, muscle tone and epileptogenic propensity through modulation of neurotransmission at GABA(A) receptors containing alpha 1, alpha 2, alpha 3 or alpha 5 subunits, and may have numerous experimental and clinical applications. The ability of non-selective BZ site inverse agonists to enhance cognition, documented in animal models and human studies, is clinically not feasible due to potentially unacceptable psychomotor effects. Most investigations to date have proposed the alpha 1 and/or alpha 5 subunit-containing GABA(A) receptors as comprising the memory-modulating population of these receptors. The novel ligand PWZ-029, which we synthesized and characterized electrophysiologically, possesses in vitro binding selectivity and moderate inverse agonist functional selectivity at alpha 5-containing GABA(A) receptors. This ligand has also been examined in rats in the passive and active avoidance, spontaneous locomotor activity, elevated plus maze and grip strength tests, primarily predictive of the effects on the memory acquisition, basal locomotor activity, anxiety level and muscle tone, respectively. The improvement of task learning was detected at the dose of 5 mg/kg in the passive, but not active avoidance test. The inverse agonist PWZ-029 had no effect on anxiety or muscle tone, whereas at higher doses (10 and 20 mg/kg) it decreased locomotor activity. This effect was antagonized by flumazenil. and also by the lower (but not the higher) dose of an agonist (SH-053-R-CH3-2'F) selective for GABA(A) receptors containing the alpha 5 subunit. The hypolocomotor effect of PWZ-029 was not antagonized by the antagonist beta-CCt exhibiting a preferential affinity for alpha 1-subunit-containing receptors. These data suggest that moderate negative modulation at GABA(A) receptors containing the alpha 5 subunit is a sufficient condition for eliciting enhanced encoding/consolidation of declarative memory, while the influence of higher doses of modulators at these receptors on motor activity shows an intricate pattern whose relevance and mechanism await to be defined.", publisher = "Elsevier Science BV, Amsterdam", journal = "Brain Research", title = "PWZ-029, a compound with moderate inverse agonist functional selectivity at GABA(A) receptors containing alpha 5 subunits, improves passive, but not active, avoidance learning in rats", volume = "1208", pages = "150-159", doi = "10.1016/j.brainres.2008.02.020" }
Savić, M., Clayton, T., Furtmueller, R., Gaurilović, I., Samardžić, J., Savić, S., Huck, S., Sieghart, W.,& Cook, J. M.. (2008). PWZ-029, a compound with moderate inverse agonist functional selectivity at GABA(A) receptors containing alpha 5 subunits, improves passive, but not active, avoidance learning in rats. in Brain Research Elsevier Science BV, Amsterdam., 1208, 150-159. https://doi.org/10.1016/j.brainres.2008.02.020
Savić M, Clayton T, Furtmueller R, Gaurilović I, Samardžić J, Savić S, Huck S, Sieghart W, Cook JM. PWZ-029, a compound with moderate inverse agonist functional selectivity at GABA(A) receptors containing alpha 5 subunits, improves passive, but not active, avoidance learning in rats. in Brain Research. 2008;1208:150-159. doi:10.1016/j.brainres.2008.02.020 .
Savić, Miroslav, Clayton, Terry, Furtmueller, Roman, Gaurilović, Ivana, Samardžić, Janko, Savić, Snežana, Huck, Sigismund, Sieghart, Werner, Cook, James M., "PWZ-029, a compound with moderate inverse agonist functional selectivity at GABA(A) receptors containing alpha 5 subunits, improves passive, but not active, avoidance learning in rats" in Brain Research, 1208 (2008):150-159, https://doi.org/10.1016/j.brainres.2008.02.020 . .