Okadaic Acid Exerts a Full Insulin-like Effect on Glucose Transport and Glucose Transporter 4 Translocation in Human Adipocytes
Okadaic Acid Exerts a Full Insulin-like Effect on Glucose Transport and Glucose Transporter 4 Translocation in Human Adipocytes
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冈田酸对人脂肪细胞中的葡萄糖转运和葡萄糖转运蛋白 4 易位发挥完全类似胰岛素的作用
DOI:
10.1074/jbc.271.30.18148
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
Ulf Smith
中科院分区:
文献类型:
--
作者:
C. Rondinone;Ulf Smith
The effects of the serine/threonine phosphatase inhibitor, okadaic acid, and insulin on glucose transport activity, glucose transporter 4 translocation to the plasma membrane, and the signaling pathway of insulin were examined in human adipocytes. Okadaic acid consistently produced a greater increase than insulin in the rate of glucose transport, and both agents together had a partial additive effect. Both insulin alone and okadaic acid alone stimulated the translocation of glucose transporter 4 to the plasma membrane. Insulin, but not okadaic acid, stimulated phosphatidylinositol 3-kinase (PI 3-kinase) activity, and wortmannin completely inhibited the effect of insulin on glucose transport. When the cells were incubated with both agents, okadaic acid inhibited insulin-stimulated PI 3-kinase activity but did not block the association of the p85 or p110 subunits of PI 3-kinase with insulin receptor substrate 1. Insulin-stimulated tyrosine phosphorylation of insulin receptor substrate 1 was only slightly reduced (15-30%) by okadaic acid. These data demonstrate that okadaic acid exerts a full insulin-like effect independent of the activation of PI 3-kinase. Thus, PI 3-kinase lipid kinase is not essential for glucose transporter 4 translocation in human adipocytes, and different pathways exist that lead to glucose transporter 4 translocation and increased glucose transport.
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DOI:
10.1016/s0021-9258(19)61974-5
发表时间:
1994-11
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
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DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
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DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
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DOI:
10.1016/s0021-9258(17)42297-6
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1994-01
期刊:
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影响因子:
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作者:
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影响因子:
15.9
作者:
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