Journal
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
Volume 86, Issue -, Pages 690-699Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2014.09.034
Keywords
1,2,4-Triazole-3-thiones; Maximal electroshock-induced seizure (MES) test; Chimney test; Radioligand binding assay; GABAergic system
Categories
Funding
- National Science Centre [UMO-2013/11/D/NZ7/01170]
- Medical University of Lublin (Lublin, Poland)
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A series of 4-alkyl-5-(3-chlorobenzyl/2,3-dichlorophenyl)-2,4-dihydro-3H-1,2,4-triazole-3-thiones (1a -14a) were designed, synthesized and screened for their anticonvulsant properties. Moreover, the acute adverse-effect profile of the active compounds (1a-7a, 12a) with respect to impairment of motor performance was evaluated in the chimney test. Among 4-alkyl-5-(3-chlorobenzyl)-2,4-dihydro-3H-1,2,4-triazole-3-thiones, ethyl, butyl, pentyl, hexyl, and heptyl derivatives administered intraperitoneally in a dose of 300 mg/kg protected 100% of the tested animals at four pretreatment times (i.e., 15, 30, 60, 120 mm). Taking into account the median effective and toxic doses as well as the time-course profile of anticonvulsant activity, 5-(3-chlorobenzyl)-4-hexyl-2,4-dihydro-3H-1,2,4-triazole-3-thione (4a) was proposed as the best tolerated and the most promising potential drug candidate. Finally, a radioligand binding assay was used to check whether the anticonvulsant activity of 4-alkyl-1,2,4-triazole-3-thiones was a result of their interactions (direct or allosteric) with GABA(A) receptor complex and/or their affinity to benzodiazepine (BDZ) binding sites. (C) 2014 Elsevier Masson SAS. All rights reserved.
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