饲粮淀粉水平对生长期肉牛肌内脂肪细胞增殖和分化的影响及其机制  

Effects of Dietary Starch Level on Proliferation and Differentiation in Intramuscular Adipocytes of Growing Cattle and Its Mechanism

作　　者：徐欣[1] 李晓波 左福元[1] 黄文明[1] XU Xin;LI Xiaobo;ZUO Fuyuan;HUANG Wenming(College of Animal Science,Southwest University,Chongqing Beef Cattle Engineering Technology Research Center,Chongqing 402460,China;Chongqing Animal Husbandry Technology Extension Station,Chongqing 401121,China)

机构地区：[1]西南大学动物科学学院,重庆市肉牛工程技术研究中心,重庆402460 [2]重庆市畜牧技术推广总站,重庆401121

出　　处：《动物营养学报》2020年第2期540-547,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：重庆市基础研究与前沿探索项目（cstc2017jcyjAX0014）;国家重点研发计划（2018YFD0501700）;中央高校基本科研业务费（XDJK2018C056)

摘　　要：肉牛生长期是肌内脂肪细胞发育的重要时期,此阶段脂肪细胞的增殖和分化受到营养物质特别是淀粉供给的重要影响。但饲粮中淀粉水平过高会产生亚急性瘤胃酸中毒,出现一系列健康问题。因此,本文总结生长期肉牛肌内脂肪细胞发育特点,从肌内脂肪细胞脂肪酸底物利用以及脂肪酶和转录因子等方面阐述了饲粮淀粉水平对生长期肉牛肌内脂肪细胞增殖和分化的调控作用和分子机制,为开展生长期肉牛肌内脂肪代谢调控研究和促进肌内脂肪沉积的应用提供理论依据和实践指导。The growth period of beef cattle is an important period of development of intramuscular adipocytes,at this stage,the proliferation and differentiation of adipocytes are affected by the supply of nutrients,especial⁃ly starch.However,dietary too high starch level can induce subacute ruminal acidosis,appear a series of health problems.This paper summarized the developmental characteristics of intramuscular adipocytes in beef growing period,and explained the regulation and molecular mechanism of dietary starch level on the proliferation and differentiation of intramuscular adipocytes in beef growing period from the aspects of fatty acid substrate utiliza⁃tion and lipase and transcription factors in intramuscular adipocyte,to provided theoretical basis and practical guidance for the study of regulation of intramuscular fat metabolism and promotion of intramuscular fat deposi⁃tion in cattle during the growing season.

关 键 词：淀粉 生长期肉牛 肌内脂肪 葡萄糖代谢 增殖和分化 

分 类 号：S823[农业科学—畜牧学]