Catalytically Inactive Lipoprotein Lipase Overexpression Increases Insulin Sensitivity in Mice
Catalytically Inactive Lipoprotein Lipase Overexpression Increases Insulin Sensitivity in Mice
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催化失活脂蛋白脂肪酶过度表达增加小鼠的胰岛素敏感性
DOI:
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发表时间:
2006
期刊:
影响因子:
--
通讯作者:
Y. Saito 1
中科院分区:
文献类型:
--
作者:
M. Shibasaki 1;H. Bujo 2;K. Takahashi 1;K. Murakami 1;H. Unoki 3;Y. Saito 1
Abnormalities in lipoprotein lipase (LPL) function contribute to the development of hypertriglyceridemia, one of the characteristic disorders observed in the metabolic syndrome. In addition to the hydrolyzing activity of triglycerides, LPL modulates various cellular functions via its binding ability to the cell surface. Here we show the effects of catalytically inactive LPL overexpression on high-fat diet (HFD)-induced decreased systemic insulin sensitivity in mice. The binding capacity of catalytically inactive G188E-LPL to C 2 C 12 skeletal muscle cells was not significantly different from that of wild type LPL. Insulin-stimulated IRS-1 phosphorylation and glucose uptake were increased by addition of wild type or mutant LPL in C 2 C 12 cells. After 10 weeks’ of HFD feeding, mice had significantly higher blood glucose levels than chow-fed mice in insulin tolerance tests. The blood glucose levels after insulin injection was significantly decreased in mutated LPL-overexpressing mice (G188E mice), as well as in wild type LPL-overexpressing mice (WT mice). Overexpression of catalytically inactive LPL, as well as wild type LPL, improved impaired insulin sensitivity in mice. These results show that decreased expression of LPL possibly causes the insulin resistance, in addition to hypertriglyceridemia, in metabolic syndrome.
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DOI:
10.1016/s0021-9258(19)39449-9
发表时间:
1990-04
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Mitsuru Emi;Dana E. Wilson;P. Iverius;Lily L. Wu;Aaron N. Hata;Robert A. Hegele;Roger R. Williams;J. Lalouel
通讯作者:
Mitsuru Emi;Dana E. Wilson;P. Iverius;Lily L. Wu;Aaron N. Hata;Robert A. Hegele;Roger R. Williams;J. Lalouel
影响因子:
7.7
作者:
Ferreira, LDMCB;Pulawa, LK;Eckel, RH
通讯作者:
Eckel, RH
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Semenkovich,CF;Wims,M;Noe,L;Etienne,J;Chan,L
通讯作者:
Chan,L
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hata,A;Ridinger,DN;Sutherland,SD;Emi,M;Kwong,LK;Shuhua,J;Lubbers,A;Guy-Grand,B;Basdevant,A;Iverius,PH
通讯作者:
Iverius,PH
DOI:
10.1172/jci116018
发表时间:
1992
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Rumsey,SC;Obunike,JC;Arad,Y;Deckelbaum,RJ;Goldberg,IJ
通讯作者:
Goldberg,IJ