›› 2013, Vol. ›› Issue (5): 30-34.

• 生物技术 • 上一篇    下一篇

紫花苜蓿对猪骨骼肌细胞肝X受体基因和蛋白表达的影响

陈颖1, 王嘉福1,2, 王芳2, 袁恬2, 张兆强2, 冉雪琴1   

  1. 1. 贵州大学动物科学学院, 贵州贵阳 550025;
    2. 贵州大学生命科学学院, 贵州贵阳 550025
  • 收稿日期:2013-02-17 出版日期:2013-05-20 发布日期:2013-05-27
  • 通讯作者: 冉雪琴(1967-),女,重庆人,硕士生导师,教授,研究方向:动物生理学与分子生物学。E-mail:as.xqran@gzu.edu.cn;Tel:0851-3863510 E-mail:as.xqran@gzu.edu.cn
  • 作者简介:陈颖(1987-),女,贵州人,硕士生,研究方向:动物生理与分子生物学。
  • 基金资助:
    国家科技支撑计划(2008BADB5B02);贵州省科技创新人才团队建设专项(黔科合人才团队2009-4006);贵州省优秀科技教育人才省长专项资金(黔省专合字2009-100)。

Effects of Alfalfa on the Expression of Liver X Receptors Gene and Protein in Pig Skeletal Muscle Cell

CHEN Ying1, WANG Jia-fu1,2, WANG Fang2, YUAN Tian2, ZHANG Zhao-qiang2, RAN Xue-qin1   

  1. 1. College of Animal Science, Guizhou University, Guiyang 550025, China;
    2. College of Life Science, Guizhou University, Guiyang 550025, China
  • Received:2013-02-17 Online:2013-05-20 Published:2013-05-27

摘要: 为了探讨紫花苜蓿对猪骨骼肌细胞中肝X受体(liver X receptors,LXRs)表达的影响及其与胴体肉质的关系,采用免疫组织化学方法检测LXRs蛋白的分布,通过酶联免疫方法(enzyme-linked immunosorbent assay,ELISA)研究LXRs蛋白总量的改变,以荧光定量PCR方法分析猪骨骼肌细胞中LXRs基因mRNA的表达变化。结果表明,LXRs定位于骨骼肌细胞的细胞质、细胞膜和细胞核内;与对照组相比,日粮中添加4%紫花苜蓿能使LXRs基因和蛋白表达量明显上升(P<0.05),并使猪的瘦肉率降低(P>0.05),肌内脂肪含量显著增高(P<0.05),同时大理石纹评分较好(P<0.05),滴水损失下降(P<0.05),细胞间隙变小(P<0.05);添加6%紫花苜蓿使LXRs基因和蛋白表达量上升(P<0.05),但低于4%紫花苜蓿组(P>0.05),同时大理石纹评分及失水率增高(P<0.05),板油重下降(P<0.05)。结果提示,紫花苜蓿添加量的不同对猪肉品质的作用效果不同,为紫花苜蓿在养猪业的科学应用奠定了理论基础。

关键词: 紫花苜蓿; 肝X受体; 免疫组化; 酶联免疫吸附试验; 荧光定量PCR

Abstract: To investigate the effects of alfalfa on the expression of liver X receptors (LXRs) gene and protein in pig skeletal muscle cell, and the influence on carcass and meat quality in pig, LXRs protein of longissimus muscle in pig was detected by immunohistochemistry (IHC) and enzyme-linked immunosorbent assay (ELISA) methods. The mRNA expression level was quantitated by Real-time quautitative PCR system. The results indicated that LXRs signal was located in the cell nucleus, cytoplasm and cell membrane. Compared with the control group, adding 4% alfalfa to daily ration could elevate the expression levels of LXRs gene and the protein (P<0.05), decrease leanness (P>0.05) and significantly increase intramuscular fat content together with a better marbling score, less water loss and smaller intercellular space (P<0.05). In 6% alfalfa group, marbling score and water lose increased, while suet weight decreased (P<0.05). A higher expression of LXRs gene and protein in 6% alfalfa group were detected, but were lower than 4% alfalfa group (P>0.05). It suggested that different additive amounts of alfalfa might result in different degree of improvement on meat quality for future usage in pig industry.

Key words: alfalfa; liver X receptors (LXRs); immunohistochemical; ELISA; quantitaitve RT-PCR

中图分类号: