New Anti-Seizure (Arylalkyl)azole Derivatives: Synthesis, In Vivo and In Silico Studies


SARI S., DALKARA S., KAYNAK F. B., REYNISSON J., Sarac S., KARAKURT A.

ARCHIV DER PHARMAZIE, vol.350, no.6, 2017 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 350 Issue: 6
  • Publication Date: 2017
  • Doi Number: 10.1002/ardp.201700043
  • Journal Name: ARCHIV DER PHARMAZIE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Allosteric modulation, Structure elucidation, Synthesis, BENZODIAZEPINE-BINDING-SITE, AMINOBUTYRIC ACID(A) RECEPTORS, EMPIRICAL SCORING FUNCTIONS, PROTEIN-LIGAND DOCKING, ANTIEPILEPTIC DRUGS, GABA(A) RECEPTORS, MOLECULAR DETERMINANTS, AMINO-ACID, STRUCTURAL REQUIREMENTS, ANTICONVULSANT ACTIVITY
  • Hacettepe University Affiliated: Yes

Abstract

(Arylalkyl)azoles are a class of antiepileptic compounds including nafimidone, denzimol, and loreclezole (LRZ). Nafimidone and denzimol are thought to inhibit voltage-gated sodium channels (VGSCs) and enhance -aminobutyric acid (GABA)-mediated response. LRZ, a positive allosteric modulator of A-type GABA receptors (GABA(A)Rs), was reported to be sensitive to Asn265 of the 2/3 subunit. Here, we report new N-[1-(4-chlorophenyl)-2-(1H-imidazol-1-yl)ethylidene]hydroxylamine esters showing anticonvulsant activity in animal models, including the 6-Hz psychomotor seizure test, a model for therapy-resistant partial seizure. We performed molecular docking studies for our active compounds using GABA(A)R and VGSC homology models. They predicted high affinity to the benzodiazepine binding site of GABA(A)R in line with the experimental results. Also, the binding mode and interactions of LRZ in its putative allosteric binding site of GABA(A)R is elucidated.