畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (9): 1840-1847.doi: 10.11843/j.issn.0366-6964.2016.09.012

• 遗传繁育 • 上一篇    下一篇

热应激状态下牛血清生化指标、miRNA表达变化及其相关性分析

胡煜1,蔡明成2,王玲1,谭林1,毕武1,张佳卉1,左福元1*   

  1. (1.西南大学荣昌校区动物科学系,荣昌 402460;2.四川农业大学动物遗传育种研究所,温江 611130 )
  • 收稿日期:2016-04-01 出版日期:2016-09-23 发布日期:2016-09-23
  • 通讯作者: 左福元,教授,主要从事反刍动物遗传育种研究,E-mail: zfuyuan@163.com
  • 作者简介:胡煜(1991-),女,湖南益阳人,硕士生,主要从事动物遗传育种研究,E-mail: huyu_186@163.com
  • 基金资助:

    重庆市科技支撑示范工程项目/丰都肉牛产业协同创新与关键技术攻关(jcsf121-2012-01-1);中央高校基本业务费专项资金资助(XDJK2016E086);西南大学荣昌校区青年基金 (20700426)

The Serum Biochemical Indexes and miRNA Expression in Cattle under Heat Stress and Their Correlation Analysis

HU Yu 1,CAI Ming-cheng 2,WANG Ling 1,TAN Lin 1,BI Wu 1,ZHANG Jia-hui 1,ZUO Fu-yuan 1*   

  1. (1.Department of Animal Science,Rongchang Campus of Southwest University,Rongchang 402460,China;2. Institute of Animal Genetics and Breeding,Sichuan Agricultural University,Wenjiang 611130,China)
  • Received:2016-04-01 Online:2016-09-23 Published:2016-09-23

摘要:

 本研究旨在探索热应激对牛miRNA表达量和血清生化指标的影响及其相互关系,筛选牛血清中与热应激相关的调控因子。选择20头体况相近、饲养管理一致的红安格斯公牛,分别于热应激期和非热应激期采集血样,进行血清生化指标及miRNA表达量的测定。结果表明,与非热应激期相比,热应激下血清Cl-浓度、LDH活性显著升高(P<0.05),MDA含量极显著升高(P<0.01);T-AOC活性、GSH-Px活性、IgA含量、 IgG含量显著降低(P<0.05),SOD活性、IL-2含量极显著降低(P<0.01)。对血清miRNA定量分析发现,miR-181a、miR-486表达量显著下调(P<0.05),分别与IgA、IL-2含量均呈显著正相关(P<0.05),分别与IgG含量呈极显著正相关(P<0.01)。而miR-1246表达量极显著上调(P<0.01),与MDA含量呈极显著正相关(P<0.01)。综上表明,miR-1246、miR-181a、miR-486在机体热应激状态下参与了调控免疫应答及抗氧化等方面的作用,可作为肉牛抗热应激的分子标记。

Abstract:

The aim of the present study was to assess the changes of miRNA expression levels and serum biochemical indexes of cattle in heat stress.Twenty Red Angus bulls with similar body condition and consistent feeding and management selected from Chongqing Improved Beef Cattle Farm were used in the experiment.Blood samples were collected from each bull in heat stress and non heat-stress to analyze miRNA expression levels and serum biochemical indexes.The results showed that the serum concentrations of Cl-(P<0.05) and malondialdehyde (MDA) (P<0.01) and the activities of lactate dehydrogenase (LDH) (P<0.05) were significantly increased in heat stress in comparison with control.Whereas,the activities of total antioxidation (T-AOC) (P<0.05),glutathione peroxidase (GSH-Px) (P<0.05) and superoxide dismutase (SOD) (P<0.01) as well as the contents of IgA (P<0.05),IgG (P<0.05) and interleukin-2 (IL-2) (P<0.01) were remarkably decreased.Meanwhile,the expression levels of miR-181a (P<0.05) and miR-486 (P<0.05) were significantly downregulated and positively correlated with the contents of IgA (P<0.05),IL-2 (P<0.05) and IgG (P<0.01),respectively,but that of miR-1246 were significantly upregulated (P<0.01) and positively correlated with serum contents of MDA (P<0.05).In conclusion,the current results suggested that miR-1246,miR-181a,miR-486 might be involved in regulating the immune response and antioxidation process of cattle in heat stress,and could be as a molecular indicator of anti-heat stress.

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