生物技术通报 ›› 2017, Vol. 33 ›› Issue (3): 175-179.doi: 10.13560/j.cnki.biotech.bull.1985.2017.03.025

• 研究报告 • 上一篇    下一篇

miR-124靶向TNF-α促进猪皮下脂肪细胞分化

李虹仪1, 李家标1, 郑艺林1, 吉卢琳1, 张茂1, 郑恩琴2   

  1. 1. 龙岩学院生命科学学院 动物营养科研创新团队,龙岩 364012;
    2. 华南农业大学 广东省农业动物基因组学与分子育种重点实验室,广州 510642
  • 收稿日期:2016-08-02 出版日期:2017-03-26 发布日期:2017-03-07
  • 作者简介:李虹仪,女,讲师,研究方向:动物营养生理与生物化学;E-mail:politician_137@163.com
  • 基金资助:
    福建省大学生创新创业训练计划项目(201511312055),福建省自然科学基金项目(2014J05043),龙岩学院博士启动基金项目(LB2013012)

miR-124 Regulates Porcine Adipocyte Differentiation Trough Targeting TNF-α

LI Hong-yi1, LI Jia-biao1, ZHENG Yi-lin1, JI Lu-lin1, ZHANG Mao1, ZHENG En-qin2   

  1. 1.Animal Nutrition Scientific Research Innovation Team,College of Life Science,Longyan University,Longyan 364012;
    2.Guangdong Provincial Key Lab of Agro-animal Genomics and Molecular Breeding, South China Agricultural University, Guangzhou 510642
  • Received:2016-08-02 Published:2017-03-26 Online:2017-03-07

摘要: 前期研究中采用双萤光素酶报告基因验证了miR-124与脂解因子猪TNF-α之间的靶关系,以此为基础研究miR-124是否影响猪皮下脂肪细胞的分化。采用miR-124 模拟物mimics和抑制物inhibitor 分别转染猪脂肪前体细胞并诱导其分化成成熟脂肪细胞,检测细胞的聚脂情况,甘油及甘油三酯的含量变化,荧光定量检测脂肪细胞关键转录因子PPARγ,脂肪合成和分解的主要酶FASN和HSL基因的表达变化。结果显示,过表达miR-124 能抑制TNF-α蛋白的表达,脂肪细胞脂滴多于对照组,甘油三酯(TG)含量显著增加(P<0.01),甘油含量亦显著增加(P<0.05),PPARγ、FASNT和HSL的表达显著上调(P<0.01);抑制细胞miR-124的表达脂滴则较少,TG含量显著减少(P<0.05),PPARγ和FASN的表达均显著下调(P<0.05)。miR-124可能通过抑制TNF-α调节猪脂肪细胞的分化,为后续研究miR-124调节脂肪代谢的相关机制奠定基础。

关键词: miR-124, 猪, 脂肪分化, TNF-α

Abstract: In the previous research,porcine TNF-α was found to be the target of miR-124 by dual luciferase assay. Here we verify whether miR-124 has the effect on the differentiation of porcine adipocyte. Porcine pre-adipocyte was transfected with miR-124 mimics or inhibitor to over-express or to repress miR-124,and then induced into mature adipocytes. The accumulation of lipid droplets was observed using Oil Red O staining and the amount of glycerol and triglycerides(TG)were detected by TG assay and glycerol assay. The expressions of PPARγ(proliferator-activated receptor-γ),FASN(fatty acid synthase),and HSL(hormone-sensitive lipase)were detected by real time fluorescence quantitative PCR. The result showed that overexpression of miR-124 repressed the expression of TNF-α protein,therefore,lipid droplets were more than that in the control,TG increased significantly(P < 0.01),also the same for glycerol(P < 0.05),and the expressions of PPARγ,FASNT,and HSL significantly up-regulated(P < 0.01). Repressing miR-124 resulted in the reduction of lipid droplets and the significant decrease of TG,and the expressions of PPARγ and FASNT significantly down-regulated(P < 0.05). In conclusion,miR-124 might regulate the differentiation of porcine adipocyte by suppressing TNF-α,laying a foundation for future studies on the mechanism of miR-124 regulating lipid metabolism.

Key words: miR-124, porcine, adipocyte differentiation, TNF-α