Ameliorative effect of chlorpromazine hydrochloride on visceral hypersensitivity in rats: possible involvement of 5-HT2A receptor

被引：9

作者：

Asano, Teita ^{[1
]}

Tanaka, Ken-ichiro ^{[2
]}

Tada, Arisa ^{[3
]}

Shimamura, Hikaru ^{[3
]}

Tanaka, Rikako ^{[3
]}

Maruoka, Hiroki ^{[3
]}

Mizushima, Tohru ^{[4
]}

Takenaga, Mitsuko ^{[1
]}

机构：

[1] St Marianna Univ, Sch Med, Inst Med Sci, Kawasaki, Kanagawa, Japan

[2] Musashino Univ, Dept Pharmaceut Sci, Tokyo, Japan

[3] Keio Univ, Fac Pharm, Tokyo, Japan

[4] LTT BioPharma Co Ltd, Tokyo, Japan

来源：

BRITISH JOURNAL OF PHARMACOLOGY | 2017年 / 174卷 / 19期

基金：

日本科学技术振兴机构;

关键词：

IRRITABLE-BOWEL-SYNDROME; CHAIN FATTY-ACIDS; COLONIC HYPERSENSITIVITY; CONCISE GUIDE; ACTIVATION; SEROTONIN; PHARMACOLOGY; MODEL; PAIN; ANTIPSYCHOTICS;

D O I：

10.1111/bph.13960

中图分类号：

R9 [药学];

学科分类号：

1007 ;

摘要：

BACKGROUND AND PURPOSE Visceral hypersensitivity is responsible for pathogenesis of irritable bowel syndrome (IBS). Therefore, its prevention can help avoid abdominal pain and discomfort in IBS. To find candidate drugs for visceral hypersensitivity, we screened existing medicines for their ability to prevent visceral sensitivity induced by colorectal distension (CRD) in rats and identified chlorpromazine, a typical antipsychotic drug, as a candidate compound. In this study, we investigated the effect of chlorpromazine on visceral hypersensitivity. EXPERIMENTAL APPROACH Visceral sensitivity (visceromotor response) was monitored by measuring the electrical activity of the abdominal external oblique muscle contraction in response to CRD using a barostat apparatus. Visceral hypersensitivity was induced by a colonic instillation of sodium butyrate or acetic acid in neonates. KEY RESULTS Oral administration of chlorpromazine suppressed butyrate-induced visceral hypersensitivity to CRD. Interestingly, atypical antipsychotic drugs, quetiapine and risperidone, ameliorated butyrate-induced visceral hypersensitivity, whereas the typical antipsychotic drugs, haloperidol and sulpiride, did not. Pharmacological analysis using specific inhibitors showed that a selective 5-HT2A receptor antagonist, ketanserin, suppressed butyrate-induced visceral hypersensitivity, whereas a selective dopamine D-2 receptor antagonist, L-741626, did not. Furthermore, the 5-HT2A receptor agonist AL-34662 stimulated visceral sensitivity to CRD in healthy control rats but not in butyrate-treated rats. These findings suggest that increased 5-HT levels in the colon contribute to the induction of visceral hypersensitivity. CONCLUSIONS AND IMPLICATIONS Our results indicate that chlorpromazine ameliorates visceral hypersensitivity and that the 5-HT2A receptor is a potential therapeutic target for treating abdominal pain and discomfort in IBS.

引用

页码：3370 / 3381

页数：12

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