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Effect of TNFα-induced insulin resistance on metabolism-related cytokines in mice
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF DIABETES
- Issue:
- 3
- DOI:
- 10.3969/j.issn.1006-6187.2009.03.010
- Key Word:
- 肿瘤坏死因子α;胰岛素抵抗;代谢;细胞因子
Abstract： 目的 探讨肿瘤坏死因子α(TNF-α)诱导的胰岛素抵抗(IR)对小鼠糖脂代谢相关细胞因子的影响.方法 用静脉葡萄糖耐量试验和3-[1H]葡萄糖为示踪剂的扩展胰岛素钳夹技术评价不同TNF-α剂量组及对照(NC)组小鼠胰岛素敏感性和糖脂代谢的变化,用RT-PCR、western blot和ELISA测定脂联素和内脏脂肪素表达水平的变化.结果 HTNF-α组小鼠FBG、Ins、FFA水平及糖耐量和胰岛素释放水平变化较MTNF-α和LTNF-α组更明显.胰岛素钳夹术中,与NC组相比,HTNF-α组Ins对FFA的抑制作用明显障碍,葡萄糖输注率明显降低,基础葡萄糖清除率(GRd)和肝糖输出率(HGP)明显升高.钳夹稳态时,HTNF-α组GRd的增加明显低于NC组,NC组HGP被完全抑制,而HTNF-α组仅被部分抑制.HTNF-α组脂肪组织脂联素和内脏脂肪素mRNA表达及血浆脂联素和内脏脂肪素水平也明显低于NC组.结论 脂联素、内脏脂肪素的变化在TNF-α诱导的IR中可能具有重要作用.
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