• 实验研究 •    

肿瘤坏死因子-α对脂肪细胞脂联素和炎症因子mRNA表达的影响

曹竞文1,何庆1,张明2,于俊娜2,张榕榕2,牛文彦2   

  1. 1. 天津医科大学总医院
    2. 天津医科大学
  • 收稿日期:2009-11-17 修回日期:2010-02-02 出版日期:2010-05-15 发布日期:2010-05-15
  • 通讯作者: 何庆

Effects of tumor necrosis factor-α on expression of adiponectin and inflammation cytokines

  • Received:2009-11-17 Revised:2010-02-02 Published:2010-05-15 Online:2010-05-15

摘要: 目的:探讨肿瘤坏死因子-α(TNF–α)在肥胖-炎症-胰岛素抵抗(IR)-2型糖尿病(T2DM)的病生理过程中的作用。方法:培养前脂肪细胞3T3-L1细胞,并诱导分化其成为成熟脂肪细胞。观察诱导分化过程中,过氧化物酶体增殖活化受体-γ(PPAR-γ)mRNA、脂联素(ADPN)mRNA的表达情况;以高浓度(20ng/mL)的TNF–α分不同时段处理分化成熟的脂肪细胞,提取总RNA,采用实时定量逆转录聚合酶链反应(real time RT-PCR)技术检测ADPN mRNA、PPAR-γ mRNA、TNF–αmRNA、白细胞介素-6(IL-6)mRNA、白细胞介素-1β(IL-1β)mRNA的表达情况。结果:3T3-L1细胞诱导分化过程中,ADPN mRNA、PPAR-γ mRNA的表达呈逐渐上升趋势;20ng/mL的TNF–α作用于成熟脂肪细胞,ADPN mRNA、PPAR-γ mRNA的表达随作用时间的增加逐渐下降,TNF–αmRNA、IL-6 mRNA的表达均有明显增加,IL-1β mRNA的表达变化无统计学意义。结论:本实验从分子生物学水平证实了糖尿病的炎症学说,TNF–α参与了肥胖-炎症-IR-T2DM的过程。

关键词: 肿瘤坏死因子-α, 3T3-L1脂肪细胞, 过氧化物酶体增殖活化受体-γ, 脂联素, 白细胞介素-6, 白细胞介素-1β, 胰岛素抵抗, 肥胖症

Abstract: Objective:To investigate the effect of TNF–αin the pathophysiological course of obesity-inflammation-insulin resistance(IR)-type 2 diabetic mellitus(T2DM).Methods: 3T3-L1 preadipocytes were cultured and induced into mature adipocytes.Observed the expressions of ADPN mRNA,PPAR-γ mRNA in the differential course of the adipocytes. Observed the expressions of ADPN mRNA,PPAR-γ mRNA, TNF–αmRNA, IL-6 mRNA and IL-1β mRNA in mature adipocytes which were treated with high concentration (20ng/mL)of the recombinant TNF–αunder diverse phase.Results:The levels of ADPN mRNA,PPAR-γ mRNA expressions were upregulated gradually within the differential course of 3T3-L1 adipocytes.The results of the genes’ expressions in adipocytes treated by TNF–α(20ng/mL)were as following: The expressions of ADPN mRNA and PPAR-γ mRNA decreased with time-dependent manner.The expression of TNF–αmRNA and IL-6 mRNA increased significantly. The expression of IL-1β mRNA didn’t show change in statistics.Conclusions: The inflammation hypothesis on etiologic mechanism of type 2 DM was studied at molecular level in this work, TNF–αplays an important role in the course of obesity-inflammation-IR-T2DM.

Key words: tumor necrosis factor-α , 3T3-L1 adipocytes , peroxisome proliferator-activated receptor gamma , adiponectin , interleukin-6 , interleukin-1β, insulin resistance, 肥胖症