Sci Rep:研究初步揭示肝葡萄糖代谢受损导致2型糖尿病发生的机制

2017-09-04 MedSci MedSci原创

肝脏在维持血糖稳态中起着关键的作用,肝葡萄糖代谢受损与2型糖尿病的发生相关。本研究中,研究人员采用RNA测序对比了糖尿病db/db小鼠及正常db/+小鼠肝脏转录组的表达谱,并确定了218个差异表达的基因。在这其中,db/db小鼠肝脏中3个lncRNA表达下调,且H19是下调最为明显的lncRNA。H19的表达与糖酵解和糖异生通路相关基因的表达显著相关,表明肝脏H19的表达水平可直接或间接地调节它们

肝脏在维持血糖稳态中起着关键的作用,肝葡萄糖代谢受损与2型糖尿病的发生相关。本研究中,研究人员采用RNA测序对比了糖尿病db/db小鼠及正常db/+小鼠肝脏转录组的表达谱,并确定了218个差异表达的基因。

在这其中,db/db小鼠肝脏中3个lncRNA表达下调,且H19是下调最为明显的lncRNA。H19的表达与糖酵解和糖异生通路相关基因的表达显著相关,表明肝脏H19的表达水平可直接或间接地调节它们的表达。

利用特异性siRNA抑制HepG2细胞和小鼠原代肝细胞中H19的表达可显著提高糖原异生基因的水平。随后伴随着肝脏葡萄糖输出量的增加。此外,删除HepG2细胞中H19可使胰岛素信号通路受损,并增加FoxO1核定位。

总之,该研究结果揭示了H19的水平降低与通过FoxO1核水平调节而损伤胰岛素信号通路之间的新关联。强调了糖尿病患者中H19在改变肝脏生理中的调节作用。

原始出处:

Neha Goyal, Ambily Sivadas, et al., RNA sequencing of db/db mice liver identifies lncRNA H19 as a key regulator of gluconeogenesis and hepatic glucose output. Sci Rep. 2017; 7: 8312. Published online 2017 Aug 16. doi: 10.1038/s41598-017-08281-7.

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    2017-09-06 zz70
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    2017-09-05 186****0580(小山羊)

    学习了谢谢了

    0

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    2017-09-04 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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    2017-09-04 131****1460

    学习了受益匪浅.

    0

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