共 6 条
胰岛素受体底物1和2敲低对猪肝脏细胞糖脂代谢的影响
被引:5
作者:

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孔庆然
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机构:
东北农业大学胚胎工程实验室 东北农业大学胚胎工程实验室

李妍
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机构:
东北农业大学胚胎工程实验室 东北农业大学胚胎工程实验室

于淼
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机构:
哈尔滨职业技术学院 东北农业大学胚胎工程实验室

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机构:
[1] 东北农业大学胚胎工程实验室
[2] 哈尔滨职业技术学院
来源:
关键词:
IRS1;
IRS2;
RNA;
干扰;
糖脂代谢;
猪;
D O I:
10.13523/j.cb.20140405
中图分类号:
R587.1 [糖尿病];
学科分类号:
100201 [内科学];
摘要:
目的:通过shRNA干扰高效敲低猪肝脏细胞中IRS1和IRS2基因的表达,进而验证其对于糖脂代谢相关基因表达的影响,为构建2型糖尿病模型猪奠定基础。方法:首先通过重叠PCR方法克隆了猪IRS1基因全部的mRNA序列(4 814bp)以及通过3'RACE方法克隆了猪IRS2基因的部分3'非编码区(3-untranslated region,3'UTR)。然后,通过Real-time PCR筛选获得了能显著敲低这两个基因的shRNA片段,并在同时敲低IRS1和IRS2的猪肝脏细胞中,检测糖脂代谢相关基因的表达。结果:猪肝脏细胞中IRS1和IRS2的表达被显著敲低,分别下降了78%和64%。另外,糖异生作用酶磷酸烯醇丙酮酸激酶(phosphoenolpyruvate carboxykinase,PEPCK)和果糖-1,6-二磷酸酶(fructose-1,6-bisphosphatase,F-1,6-BP)基因表达显著上升,并导致催化肝脏中糖酵解反应的葡糖激酶(glucokinase,Gck)基因表达的显著下降。同时,胆固醇调节元件结合蛋白(sterol regulatory element-binding proteins,SREBP-1)基因的表达也显著上升以及胆固醇调节基因Abcg8,CYP7a1表达明显上调。结论:猪肝脏细胞中IRS1和IRS2基因的敲低可激活糖异生作用,并抑制糖酵解反应,从而导致糖代谢的异常,同时也能引起脂类代谢的异常。
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页码:27 / 35
页数:9
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