文献类型： 外文期刊

作者： Jiao, Yuping ¹ ; Wilson, Peter W. ¹ ; Reid, Angus M. A. ¹ ; Dunn, Ian C. ¹ ;

作者机构： 1.Univ Edinburgh, Roslin Inst, Edinburgh EH25 9RG, Midlothian, Scotland

2.Henan Acad Agr Sci, Inst Anim Husb & Vet, Zhengzhou, Henan, Peoples R China

3.Univ Edinburgh, Inst Genet & Mol Med, MRC Human Genet Unit, Edinburgh EH4 2XU, Midlothian, Scotland

关键词： GAST; CCK family; CCKAR; CCKBR; Hormone; mRNA expression; Feeding; Avian; Crop

期刊名称：GENERAL AND COMPARATIVE ENDOCRINOLOGY （ 影响因子：3.255； 五年影响因子：3.0 ）

ISSN： 0016-6480

年卷期： 2022 年 321 卷

页码：

收录情况： SCI

摘要： Gastrin and cholecystokinin peptides bind a common G-protein coupled receptor, cholecystokinin receptor B (CCKBR) whilst cholecystokinin receptor A (CCKAR) is preferentially bound by CCK. Gastrin and cholecystokinin mediate signalling from the gastrointestinal tract to regulate appetite and digestive function. In this study, expression of the cholecystokinin/gastrin family and distribution of their receptors expression was measured to understand the target organs for the peptides and how expression responds to changes in food intake. We confirmed the restricted expression of gastrin in the antrum and the abundant expression of cholecystokinin in the hypothalamus. The expression of gastrin in the antrum was significantly elevated in broiler breeders when released from feed restriction. CCKBR was most abundant in the hypothalamus and proventriculus. CCKAR was most abundant in the pancreas and crop, more than tenfold greater than the gastrointestinal tract. Cholecystokinin expression in the pancreas increased after removal of food restriction. CCKAR in the gastrointestinal tract peaks around the distal ileum, distal to the peak of cholecystokinin expression. There was virtually no cholecystokinin expression in the caecum but CCKAR expression was high. The CCKAR expression in the crop was unexpected, supporting a role of cholecystokinin in mediating crop emptying which was supported by the observation of in-vitro contraction after cholecystokinin administration. The response to changes in food intake and the expression pattern of the cholecystokinin/gastrin family and their receptors will stimulate and inform new hypotheses on their role in growth in poultry.