Anti-inflammatory effects of alosetron mediated through 5-HT3 receptors on experimental colitis

Azadeh Motavallian*, Mohsen Minaiyan, Mohammad Rabbani, Parvin Mahzouni, Sasan Andalib

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Development of new medicine with fewer deleterious effects and more efficacies for treatment of inflammatory bowel disease is needed. 5-Hydroxytryptamine 3 receptor (5-HT3R) antagonists have exhibited analgesic and anti-inflammatory features in vitro and in vivo. The present study was designed to evaluate the anti-inflammatory effect of alosetron, a 5-HT3R antagonist, on trinitrobenzenesulfonic acid (TNBS)-induced ulcerative colitis in rats. Two h subsequent to induce colitis (intracolonic instillation of TNBS, 50 mg/kg) in male Wistar rats, alosetron (1 mg/kg), dexamethasone (1 mg/kg), meta-chlorophenylbiguanide (mCPBG, a 5-HT3R agonist, 5 mg/kg), or alosetron + mCPBG were administrated intraperitoneally for 6 days. Animals were thereafter sacrificed and the efficacy of drugs was evaluated macroscopically, histologically, and biochemically (myeloperoxidase, tumor necrosis factor-alpha, interleukin-6, and interleukin-1 beta) on distal colon samples. Treatment with alosetron and dexamethasone improved macroscopic and microscopic colonic damages significantly and decreased myeloperoxidase activity and colonic levels of inflammatory cytokines. The profitable effects of alosetron were antagonized by concurrent administration of mCPBG. Our data provided evidence that the protective effects of alosetron on TNBS-induced colitis can be mediated by 5-HT3R.

Original languageEnglish
JournalResearch in Pharmaceutical Sciences
Volume14
Issue number3
Pages (from-to)228-236
ISSN1735-5362
DOIs
Publication statusPublished - Jun 2019

Keywords

  • 5-HT3 receptor
  • Alosetron
  • Colitis
  • Inflammatory bowel disease
  • TNBS

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