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SHP2 knockdown ameliorates liver insulin resistance by activating IRS‐2 phosphorylation through the AKT and ERK1/2 signaling pathways
FEBS Open Bio ( IF 2.8 ) Pub Date : 2020-10-04 , DOI: 10.1002/2211-5463.12992
Xinxin Yue 1 , Tao Han 2 , Wei Hao 1 , Min Wang 1 , Yang Fu 3
Affiliation  

Diabetes is a chronic metabolic disease characterized by insulin resistance (IR). SHP2 has previously been identified as a potential target to reduce IR in diabetes. Here, we examined the effects of SHP2 on glucose consumption (GC), IR level and the expression of insulin receptor substrate (IRS), AKT and extracellular signal‐regulated kinase (ERK)1/2 proteins in a cellular and animal model of diabetes. IR was induced in hepatocellular carcinoma (HCC) cells, and SHP2 was up‐regulated or down‐regulated in cells. Diabetic rats were treated with SHP2 inhibitor. GC of cells, and the weight, total cholesterol, triglycerides, fasting blood glucose, fasting insulin, homeostasis model assessment‐IR index and insulin sensitivity (ISI) of the rats were analyzed. The levels of SHP2 and the activation of IRS‐2, AKT and ERK1/2 in cells and rats were measured by quantitative real‐time PCR (qRT‐PCR) or western blot. GC was reduced, but expression of SHP2 was enhanced in IR HCC cells. Phosphorylation of IRS‐2 and AKT in IR HCC cells and diabetic rats was decreased, whereas phosphorylation of ERK1/2 was enhanced. In both the cell and animal models, SHP2 knockdown enhanced GC, ameliorated IR, activated IRS‐2 and AKT, and inhibited ERK1/2 phosphorylation, in contrast with the effects of SHP2 overexpression. SHP2 knockdown may enhance GC and ameliorate IR through phosphorylation of IRS‐2 via regulating AKT and ERK1/2 in liver.

中文翻译:

SHP2 敲低通过 AKT 和 ERK1/2 信号通路激活 IRS-2 磷酸化来改善肝脏胰岛素抵抗

糖尿病是一种以胰岛素抵抗(IR)为特征的慢性代谢性疾病。SHP2 先前已被确定为降低糖尿病患者 IR 的潜在目标。在这里,我们检查了 SHP2 对糖尿病细胞和动物模型中葡萄糖消耗 (GC)、IR 水平和胰岛素受体底物 (IRS)、AKT 和细胞外信号调节激酶 (ERK)1/2 蛋白表达的影响. IR 在肝细胞癌 (HCC) 细胞中被诱导,而 SHP2 在细胞中被上调或下调。糖尿病大鼠用 SHP2 抑制剂治疗。分析细胞的GC,以及大鼠的体重、总胆固醇、甘油三酯、空腹血糖、空腹胰岛素、稳态模型评估-IR指数和胰岛素敏感性(ISI)。SHP2 的水平和 IRS-2 的激活,通过实时定量 PCR (qRT-PCR) 或蛋白质印迹法测量细胞和大鼠中的 AKT 和 ERK1/2。GC 降低,但 SHP2 的表达在 IR HCC 细胞中增强。IR HCC 细胞和糖尿病大鼠中 IRS-2 和 AKT 的磷酸化降低,而 ERK1/2 的磷酸化增强。在细胞和动物模型中,与 SHP2 过表达的影响相反,SHP2 敲低增强了 GC,改善了 IR,激活了 IRS-2 和 AKT,并抑制了 ERK1/2 磷酸化。SHP2 敲低可能通过调节肝脏中的 AKT 和 ERK1/2 磷酸化 IRS-2 来增强 GC 并改善 IR。而 ERK1/2 的磷酸化增强。在细胞和动物模型中,与 SHP2 过表达的影响相反,SHP2 敲低增强了 GC,改善了 IR,激活了 IRS-2 和 AKT,并抑制了 ERK1/2 磷酸化。SHP2 敲低可能通过调节肝脏中的 AKT 和 ERK1/2 磷酸化 IRS-2 来增强 GC 并改善 IR。而 ERK1/2 的磷酸化增强。在细胞和动物模型中,与 SHP2 过表达的影响相反,SHP2 敲低增强了 GC,改善了 IR,激活了 IRS-2 和 AKT,并抑制了 ERK1/2 磷酸化。SHP2 敲低可能通过调节肝脏中的 AKT 和 ERK1/2 磷酸化 IRS-2 来增强 GC 并改善 IR。
更新日期:2020-12-03
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