Different effects of ghrelin, des-acyl ghrelin and obestatin on gastroduodenal motility in conscious rats
Different effects of ghrelin, des-acyl ghrelin and obestatin on gastroduodenal motility in conscious rats
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DOI：
10.3748/wjg.14.6318
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发表时间：
2008-11-07
影响因子：
4.3
通讯作者：
Inui, Akio
中科院分区：
文献类型：
--
作者：
Fujimiya, Mineko;Asakawa, Akihiro;Inui, Akio
生长素释放肽、去酰基生长素释放肽和肥胖抑制素这三种肽是通过翻译后加工从源自胃内分泌细胞的共同激素原（前生长素释放肽原）衍生的。为了检查这些肽的作用，我们在自由活动的清醒大鼠模型中应用了胃肠动力的测压测量。Ghrelin在进食和禁食状态下对动物胃窦和十二指肠的运动都有刺激作用。在禁食状态下，去酰基ghrelin对动物胃窦运动有抑制作用，但对十二指肠运动无抑制作用。Obestatin对动物进食状态下的胃窦和十二指肠运动有抑制作用，但对禁食状态下的胃窦和十二指肠运动无抑制作用。脑中的NPY Y2或Y4受体可介导生长素释放肽的作用，脑中的CRF 2型受体介导去酰基生长素释放肽的作用，而脑中的CRF 1型和2型受体介导肥胖抑制素的作用。迷走神经传入通路可能参与ghrelin的作用，但不参与去酰基ghrelin的作用，而迷走神经传入通路可能部分参与obestatin的作用。(C)2008年，WJG出版社。All rights reserved.
Three peptides, ghrelin, des-acyl ghrelin and obestatin are derived from a common prohormone, preproghrelin by posttranslational processing, originating from endocrine cells in the stomach. To examine the effects of these peptides, we applied the manometric measurement of gastrointestinal motility in freely moving conscious rat models. Ghrelin exerts stimulatory effects on the motility of antrum and duodenum in both fed and fasted state of animals. Des-acyl ghrelin exerts inhibitory effects on the motility of antrum, but not on the motility of duodenum in the fasted state of animals. Obestatin exerts inhibitory effects on the motility of antrum and duodenum in the fed state, but not in the fasted state of animals. NPY Y2 or Y4 receptors in the brain may mediate the action of ghrelin, CRF type 2 receptors in the brain mediate the action of des-acyl ghrelin, whereas CRF type 1 and type 2 receptors in the brain mediate the action of obestatin. Vagal afferent pathways might be involved in the action of ghrelin, but not involved in the action of des-acyl ghrelin, whereas vagal afferent pathways might be partially involved in the action of obestatin. (C) 2008 The WJG Press. All rights reserved.