基础医学与临床 ›› 2018, Vol. 38 ›› Issue (1): 63-68.

• 研究论文 • 上一篇    下一篇

miR-202通过抑制PGC1β表达促进3T3-L1前脂肪细胞分化

伍迪,凌宏艳,曹参,何剑琴,杨丝丝,张恺芳,奉水东   

  1. 南华大学
  • 收稿日期:2016-12-05 修回日期:2017-05-05 出版日期:2018-01-05 发布日期:2017-12-26
  • 通讯作者: 奉水东 E-mail:shuidong_f@hotmail.com
  • 基金资助:
    教育部留学归国基金;湖南教育厅;衡阳市科技局

miR-202 promotes the differentiation of 3T3-L1 preadipocyte via inhibiting PGC1β expression

  • Received:2016-12-05 Revised:2017-05-05 Online:2018-01-05 Published:2017-12-26

摘要: 目的 观察miR-202对3T3-L1前脂肪细胞分化的影响及可能的机制。方法:通过慢病毒感染构建稳定表达AMO-miR-202和乱序对照miRNA细胞系,随后诱导分化。至分化的第9天,油红O染色观察细胞内脂滴的情况,RT-PCR检测过氧化物酶体激活增殖受体γ2(PPARγ2)和aP2的基因表达;Western-blot检测PPARγ2、ap2和miR-202靶基因PPARγ辅助活化因子1β(PGC1β)蛋白表达。结果:经293T细胞慢病毒包装AMO-miR-202、乱序对照miRNA,荧光显微镜下可见约80%-90%荧光细胞;将上述2组病毒液分别感染3T3-L1前脂肪细胞后,可见约70%-80%荧光细胞。AMO-miR-202组细胞内脂滴及PPARγ2和aP2的mRNA表达显著低于乱序对照组和对照组(P<0.05)。与乱序对照组和对照组相比,AMO-miR-202组PGC1β蛋白表达显著增加(P<0.05),PPARγ2和aP2蛋白表达显著降低(P<0.01),而乱序对照组和脂肪细胞组上述指标无明显差异。结论:miR-202可能通过抑制PGC1β、提高PPARγ2和aP2的表达促进3T3-L1前脂肪细胞分化。

关键词: 关键词:miR-202, 3T3-L1前脂肪细胞, 脂肪细胞分化, PGC1β

Abstract: Objective: To explore the effect and molecular mechanism of miR-202 on the differentiation of 3T3-L1 preadipocyte.Method:Through lentivirus infected with 3T3-L1 preadipocytes, we set up the AMO-miR-202 group and the random control group, then, these cells were induced to differentiate, nine days later, differentiation was assessed by oil red O staining and we examined the mRNA expression of PPARγ2 and aP2 by RT-PCR method.We examined the mRNA expression of PPARγ2、ap2 and PGC1β by Western-blot method. Results:After packaging lentivirus with AMO-miR-202 and random sequence control miRNA through 293T cell line, we can see about 80%-90% cells with fluorescence under fluorescence microscope; After these two lentivirus respectively infected with 3T3-L1 preadipocytes, we can see about 70%-80% cells with fluorescence under fluorescence microscope.Oil red O staining test showed that these cells with oil red O stained bright red fat droplets of AMO-miR-202 group and PPARγ2 and aP2 mRNA expression in the AMO-miR-202 group significantly lower than control groups (P<0.05).Western-blot assay showed that the protein expression of PGC1β in the AMO-miRNA-202 group was significantly increased(P<0.05), but the protein expression of aP2 and PPARγ2 was significantly decreased (P<0.01), however, the random control group and the adipocyte group had no significant effect on the above indexes. Conclusion:miR-202 can promote the differentiation of 3T3-L1 preadipocyte by inhibiting the protein expression of PGC1β and improving the protein expression of PPARγ2 and aP2.

Key words: KEY WORDS:miR-202, 3T3-L1 preadipocyte, adipocyte differentiation, PGC1β

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