胰岛素受体底物1与肝硬化胰岛素抵抗的研究进展

肝硬化与胰岛素抵抗密切相关,临床表现为高糖血症、高胰岛素血症、高脂血症以及各种细胞因子的异常增高,其病理机制目前尚不明确。近来研究发现,肝硬化胰岛素抵抗与胰岛素受体底物有关,而胰岛素受体底物是胰岛素信号传导通路中的关键信号分子,它可通过表达上调或下调、翻译后修饰,以及亚细胞定位来改变胰岛素信号的传导,其中翻译后修饰中的磷酸化/去磷酸化显得尤为重要且较为复杂。再者,不同病因的肝硬化胰岛素受体底物的作用途径并不相同。

Advances on relationship between insulin receptor substrate-1 and insulin resistance in liver cirrhosis

Liver cirrhosis (LC) and insulin resistance (IR) are closely correlated, clinically presenting hyperglycemia, hyperinsulinism, hyperlipidemia and high cytokines levels, however, the underlying mechanism is not completely clear. Recent reports show that insulin receptor substrate-1 (IRS-1) is associated with IR in LC. IRS-1 plays a pivotal role on insulin signal transduction; it changes insulin signaling by up-or down-regulating of protein presentation, post-translational modification and subcellular localization of proteins, particularly in phosphorylation/dephosphorylation of post-traslational modification. Furthermore, LC with different etiology may have different mechanism of IRS-1 effect on IR.