胆汁酸对料摄入量和与胃口相关的神经的mRNA表达的中心作用在层型小中

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¹Key Laboratory of Efficient Utilization of Non-grain Feed Resources (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Shandong Provincial Key Laboratory of Animal Nutrition and Efficient Feeding, Department of Animal Science, Shandong Agricultural University, Taian, Shandong 271017, China.

Poultry science

|November 20, 2025

概括

饮食胆汁酸 (BAs) 通过影响下丘脑中食欲调节神经来影响的食摄入量. 不同的BA表现出不同的效果,以剂量依赖的方式影响NPY和POMC等基因.

科学领域:

动物生理学动物生理学
神经内分泌学神经内分泌学
营养神经科学营养神经科学

背景情况:

食胆酸 (BAs) 是已知的新陈代谢和能量平衡的调节者.
通过BA影响食物摄入的中心机制,特别是在鸟类中,仍然在很大程度上未被探索.
了解下丘脑中的BA信号对于破译食欲调节至关重要.

研究的目的:

为了研究各种胆汁酸对小的料摄入的影响.
检查胆汁酸对关键食欲相关神经的下丘脑表达的影响.
为了阐明参与胆酸介导的食欲控制的中枢神经通路.

主要方法:

给5天大的小注射了7种不同的胆汁酸 (TCDCA,STC,CDCA,TCA,HDCA,ACA,MBA) 的三次脑内 (ICV) 注射.
在注射后30,60分钟和120分钟监测了料摄入量.
量化PCR (qPCR) 用于测量下丘脑mRNA中神经Y (NPY),agouti相关 (AgRP),亲opiomelanocortin (POMC) 和黑色皮质蛋白受体 (MC3R/MC4R) 的水平.

主要成果:

通过ICV给药CDCA,CA,HDCA,MBA和STC显著减少了料摄入量,而ACA和TCDCA则增加了料摄入量.
特定BA调节的下丘脑神经基因表达:TCDCA上调NPY5R,CDCA下调NPY4R,ACA降低MC4R,MBA降低NPY4R和NPY5R.
STC和CA增加了POMC和MC4R的表达,同时降低了AgRP,而HDCA只降低了AgRP的表达,表明对氧化和无氧化途径的差异性影响.

结论:

胆汁酸通过下丘脑的中央机制对小的料摄入有显著的控制.
观察到的效应是通过调节氧化和无氧化神经基因表达的调节来调节的.
胆酸对食欲调节的作用是剂量依赖的,这突出了它们在能量恒温中的潜在作用.

关键词:

胆汁酸胆汁酸是一种肉肉肉肉料摄入量料摄入量在ICV中,ICV是ICV.

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