畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (4): 534-541.doi: 10.11843/j.issn.0366-6964.2015.04.004

• 遗传繁育 • 上一篇    下一篇

猪miR-135a-5p预测靶基因APC的鉴定

陈晨1,2,邓缘1,任慧波1,朱吉1,胡雄贵1,蒋思文2*,彭英林1*   

  1. (1.湖南省畜牧兽医研究所,长沙 410131; 2.华中农业大学动物科技学院,武汉 430070)
  • 收稿日期:2014-07-08 出版日期:2015-04-23 发布日期:2015-04-23
  • 通讯作者: 蒋思文,教授,E-mail:jswhzau@163.com;彭英林,研究员,E-mail:ylpeng_1965@163.com
  • 作者简介:陈晨(1986-),男,河南开封人,助理研究员,博士,主要从事猪分子遗传育种的研究,Tel:0731-84611058,E-mail:2004chch@163.com
  • 基金资助:

    湖南省科技计划项目(2014NK3036);国家自然科学基金(31401097)

Identification of APC as the Potential Target of miR-135a-5p in Pigs

CHEN Chen1,2,DENG Yuan1,REN Hui-bo1,ZHU Ji1,HU Xiong-gui1,JIANG Si-wen2*,PENG Ying-lin1*   

  1. (1.Hunan Institute of Animal and Veterinary Science,Changsha 410131,China;2.College of Animal Science and Technology,Huazhong Agricultural University,Wuhan 430070,China)
  • Received:2014-07-08 Online:2015-04-23 Published:2015-04-23

摘要:

本研究旨在鉴定猪miR-135a-5p靶向脂肪发育的相关基因。首先,利用生物信息学软件分析发现,结肠腺瘤性息肉病(APC)基因的3′ 非翻译区(3′ UTR)具有两个与猪miR-135a-5p结合的潜在位点。其次,构建APC基因野生型(APC 3′ UTR)和突变型(APC 3′ UTR m1、APC 3′ UTR m2、APC 3′ UTR m3)3′ UTR双荧光素酶载体,并分别将其与miR-135a-5p mimics、阴性对照(NC)共转染PK-15细胞后检测荧光活性。结果显示:miR-135a-5p mimics显著降低APC 3′ UTR和APC 3′ UTR m2载体的荧光活性(P<0.05),而APC 3′ UTR m1和APC 3′ UTR m3载体的荧光活性得到完全恢复,表明miR-135a-5p主要结合在预测的第一个位点。进一步的分析表明,miR-135a-5p抑制猪前体脂肪细胞内源APC基因的mRNA和蛋白质表达水平。研究结果证实,猪miR-135a-5p靶向APC基因,且调控其表达。本试验为深入研究猪miR-135a-5p的生物学功能及其调控脂肪形成的作用机制提供了基础。

Abstract:

This research aimed to investigate the potential target genes related to adipose tissue development.The bioinformatics softwares were used to predict the target gene of ssc-miR-135a-5p,and it was found that the 3′ UTR of adenomatous polyposis coli (APC) gene had 2 putative binding sites with miR-135a-5p.The wild-type (APC 3′ UTR) and 3 mutated (APC 3′ UTR m1,APC 3′ UTR m2 and APC 3′ UTR m3) dual-luciferase vectors were constructed and then co-transfected into PK-15 cells with miR-135a-5p mimics or negative control (NC),respectively,and then the luciferase activity was detected.The results showed that miR-135a-5p mimics significantly decreased the luciferase activities of APC 3′ UTR and APC 3′ UTR m2 vectors (P<0.05),while APC 3′ UTR m1 and APC 3′ UTR m3 completely abolished the inhibitory effects of miR-135a-5p,which demonstrated that miR-135a-5p mainly binded with the first site in 3′ UTR of APC gene.Further analysis revealed that miR-135a-5p inhibited the levels of endogenous APC mRNA and protein in porcine preadipocytes,which indicate that the target gene of ssc-miR-135a-5p is APC gene and regulates its expression.Taken together,this study will provide new insight into the biological function of ssc-miR-135a-5p and its mechanism in regulating adipogenesis.

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