文章评论:IR-β在游离脂肪酸介导的肝脏胰岛素抵抗中的作用?

Samit Shah, A. Cox
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引用次数: 0

摘要

已经进行了几项研究来阐明游离脂肪酸(FFAs)在2型糖尿病发病机制中的作用,但FFAs改变肝脏葡萄糖代谢的确切分子机制仍未完全了解。1-4在最近发表的一篇文章中,Ragheb及其同事使用果糖饲养的仓鼠模型,通过免疫沉淀和免疫印迹技术研究了游离脂肪酸(FFA)治疗对胰岛素信号传导和胰岛素抵抗的影响,研究了高浓度胰岛素和游离脂肪酸对胰岛素受体β (IR-β)和PI3K通路下游元件的影响。他们的研究结果清楚地表明,游离脂肪酸对IR-β的影响不显著,并支持了之前的研究结果,即游离脂肪酸通过PKC-NFκB途径导致肝脏胰岛素抵抗
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Article Commentary: A Role for IR-β in the Free Fatty Acid Mediated Development of Hepatic Insulin Resistance?
Several studies have been conducted to elucidate the role of free fatty acids (FFAs) in the pathogenesis of type 2 diabetes, but the exact molecular mechanism by which FFAs alter glucose metabolism in the liver is still not completely understood.1–4 In a recent publication, Ragheb and coworkers have examined the effect of free fatty acid (FFA) treatment on insulin signaling and insulin resistance by using immunoprecipitation and immunoblotting to study the effect of high concentrations of insulin and FFAs on insulin receptor-beta (IR-β) and downstream elements in the PI3K pathway using the fructose-fed hamster model. 5 Their results clearly show that free fatty acids have an insignificant effect on IR-β and supports previous findings that FFAs lead to insulin resistance in the liver via the PKC-NFκB pathway.2,3
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Biochemistry Insights
Biochemistry Insights BIOCHEMISTRY & MOLECULAR BIOLOGY-
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