Novel derivatives of 1,2,3-triazole, cannabinoid-1 receptor ligands modulate gastrointestinal motility in mice

Agata Szymaszkiewicz, Marta Zielinska, Kun Li, Mani Ramanathan, Safiul Alam, Duen Ren Hou, Jakub Fichna, Martin Storr

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Cannabinoid-1 (CB1) receptors are broadly distributed in the central and peripheral nervous systems; among others, they are located in the enteric nervous system. In the gastrointestinal (GI) system, they participate in regulation of intestinal motility or ion transport. The aim of our study was to assess the effect of 1,2,3-triazole derivatives (compound 1: 2-[4,5-bis(2,4-dichlorophenyl)-2H-1,2,3-triazol-2-yl]-N-(2-fluorobenzyl)acetamide, compound 2: 2-[4,5-bis(2,4-dichlorophenyl)-2H-1,2,3-triazol-2-yl]-N-(4-fluorobenzyl)acetamide, compound 3: N-benzyl-2-[4-(4-chlorophenyl)-5-(2,4-dichlorophenyl)-2H-1,2,3-triazol-2-yl]acetamide]), characterized in vitro as CB1 antagonists with high CB1 over CB2 selectivity, in the mouse GI tract. The action of compounds 1–3 was assessed in vitro (electrical field stimulated smooth muscle contractility of the mouse ileum and colon) and in vivo (whole GI transit time). Compound 1 decreased ileal (10−6 M) and colonic (10−7–10−6 M) smooth muscles contractility. Moreover, it prolonged whole GI transit. Compound 2 (10−10–10−8 M) slightly increased the amplitude of muscle contractions in the ileum, but at a higher concentration (10−6 M), the amplitude was decreased. Compound 2 reduced colonic contractility but accelerated GI transit. Compound 3 decreased the amplitude of intestinal muscle contractions in the ileum (10−6 M) and colon (10−10–10−6 M). Moreover, it increased the GI transit time in vivo. Triazole derivatives possess easily modifiable structure and interesting pharmacological action in the GI tract; further, alterations may enhance their efficacy at CB receptors and provide low side effect profile in clinical conditions.

Original languageEnglish
Pages (from-to)435-444
Number of pages10
JournalNaunyn-Schmiedeberg's Archives of Pharmacology
Volume391
Issue number4
DOIs
StatePublished - 1 Apr 2018

Keywords

  • 1,2,3-Triazoles
  • Cannabinoid receptor
  • CB1 antagonist
  • Rimonabant
  • SR141716A

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