畜牧兽医学报 ›› 2017, Vol. 48 ›› Issue (3): 416-424.doi: 10.11843/j.issn.0366-6964.2017.03.004

• 遗传育种 • 上一篇    下一篇

牦牛KLF5、KLF6、KLF7基因的克隆表达及其与肌内脂肪含量的相关性分析

朱江江1,2,林亚秋1,2,左璐璐1,王永1,2,柏雪2*,江明锋2   

  1. (1. 青藏高原动物遗传资源保护与利用四川省重点实验室,成都 610041;2. 动物遗传育种学国家民委-教育部重点实验室,成都 610041)
  • 收稿日期:2016-09-12 出版日期:2017-03-23 发布日期:2017-03-23
  • 通讯作者: 柏雪,硕士,讲师,主要从事动物营养学研究,E-mail: yukivy@163.com
  • 作者简介:朱江江(1986-),男,湖北钟祥人,博士,助理研究员,主要从事动物遗传育种学研究,E-mail: zhujiang4656@hotmail.com
  • 基金资助:

    四川省青年科技创新团队项目(2015TD0025)

Molecular Cloning, Tissue Expression of KLF5, KLF6, KLF7 Genes, and Their Correlations with Intramuscular Fat Content in Yak

ZHU Jiang-jiang1,2, LIN Ya-qiu1,2, ZUO Lu-lu1, WANG Yong1,2, BAI Xue2* , JIANG Ming-feng2   

  1. (1. Key Laboratory of Sichuan Province for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Chengdu 610041, China; 2. Key Laboratory of State Ethnic Affairs Commission and Ministry of Education for Animal Genetics & Breeding, Chengdu 610041, China)
  • Received:2016-09-12 Online:2017-03-23 Published:2017-03-23

摘要:

本研究旨在克隆牦牛Krüppel样因子(KLF5、KLF6、KLF7)的CDS区序列,鉴定其在牦牛不同组织中的表达水平,并分析其表达水平与牦牛肌内脂肪(IMF)的相关性,从而为研究KLFs在牦牛脂质代谢中的功能提供试验依据。选取4~6周岁的健康麦洼牦牛公牛7头,清晨空腹屠宰后,迅速采集脾、肺、肾、皮下脂肪和背最长肌组织样品,提取组织总RNA,利用RT-PCR法克隆牦牛KLF5、KLF6、KLF7基因序列,进行生物信息学分析,利用实时定量PCR法检测其mRNA的表达水平,并使用皮尔逊相关系数进行KLF5、KLF6、KLF7基因的表达量与IMF含量的相关性分析。结果表明,KLF5、KLF6、KLF7基因CDS全长分别为1 086、855和909 bp,分别编码361、284和302个氨基酸残基,且均与牛具有最近的亲缘关系,其次为山羊、绵羊、猪,而与鸡的亲缘关系较远。KLF5、KLF6、KLF7均在肺中具有较高的表达水平,而在背最长肌中的表达量较低,且与牦牛IMF含量均没有显著相关性。但KLF5的表达水平与KLF6、KLF7均具有显著的正相关性。这些结果为研究KLF5、KLF6、KLF7的功能提供了基础数据,也为揭示牦牛脂质代谢的调控机制提供了试验参考。

Abstract:

The aims of the study were to clone the CDS of krüppel-like factors (KLF5, KLF6, KLF7), determine their expression in various tissues, and analyze their correlation with intramuscular fat (IMF), which might provide basis for the functional research on KLFs in regulating lipid metabolism in yak. Seven healthy, 4-6 years old male Maiwa yaks were selected as experiment animals. After fasting slaughter, the tissue samples of spleen, lung, kidney, subcutaneous fat and longissimus dorsi muscle were collected for the total RNA extraction. The sequences of KLF5, KLF6 and KLF7 genes were cloned by RT-PCR, and analyzed using bioinformatics, respectively. The mRNA expression of KLFs were determined using real-time fluorescent quantitative PCR (qPCR). Pearson correlation coefficient was used for analyzing the correlation between the mRNA expression of KLFs and IMF content in yak. The CDS of KLF5, KLF6 and KLF7 were 1 086, 855 and 909 bp, encoding 361, 284 and 302 amino acids, respectively. The yak KLFs sequences were closest associated with bovine, followed by goat, sheep, pig, and more distant with chicken. The tissue expression of the KLF5, KLF6 and KLF7 were higher in lung, and lower in longissimus dorsi muscle. The expression of KLF5 was significantly correlated with the expression of KLF6 and KLF7, respectively. However, all of mRNA expression of KLFs were not correlated with IMF content in longissimus dorsi muscle of yak. These data provided basic information for the functional research of KLF5, KLF6, KLF7, and would be beneficial for understanding the regulatory mechanism of lipid metabolism in yak.

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