Dual Action of Eicosapentaenoic Acid in Hepatoma Cells

Dual Action of Eicosapentaenoic Acid in Hepatoma Cells
复制标题

二十碳五烯酸在肝癌细胞中的双重作用

DOI:
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发表时间:
2001
影响因子:
4.8
通讯作者:
K. Chihara
K. Chihara
中科院分区:
生物学2区
文献类型:
--
作者:
M. Murata;H. Kaji;K. Iida;Y. Okimura;K. Chihara

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外源性给予二十碳五烯酸(EPA)可改善胰岛素敏感性,但其确切机制尚不清楚。在这里,我们表明,EPA刺激肝癌细胞的细胞内胰岛素信号通路。这些细胞暴露于EPA引起几种胰岛素诱导的活性的上调,包括胰岛素受体底物-1的酪氨酸磷酸化,胰岛素受体底物-1-相关的磷脂酰肌醇3-激酶,及其下游靶Akt激酶活性,以及下调胰岛素生成。相反,EPA降低丝裂原活化蛋白激酶活性,抑制细胞增殖。这些发现提高了EPA上调胰岛素代谢作用并抑制人类细胞生长的可能性。
Exogenous administration of eicosapentaenoic acid (EPA) improves insulin sensitivity, but its precise mechanism remains unknown. Here we show that EPA stimulates the intracellular insulin signaling pathway in hepatoma cells. Exposure of these cells to EPA caused up-regulation of several insulin-induced activities including tyrosine phosphorylation of insulin receptor substrate-1, insulin receptor substrate-1-associated phosphatidylinositol 3-kinase, and its downstream target Akt kinase activity as well as down-regulation of gluconeogenesis. In contrast, EPA decreased mitogen-activated protein kinase activity and inhibited cell proliferation. These findings raise the possibility that EPA up-regulates metabolic action of insulin and inhibits cell growth in humans.
DOI: 10.1073/pnas.93.25.14795
发表时间: 1996-12-10
影响因子: 11.1
作者:
Chen, GX;Koyama, K;Unger, RH
通讯作者: Unger, RH
DOI: 10.1172/jci118742
发表时间: 1996-06-15
影响因子: 15.9
作者:
Roden, M;Price, TB;Shulman, GI
通讯作者: Shulman, GI
DOI: 10.1172/jci119390
发表时间: 1997-05-01
影响因子: 15.9
作者:
Hawkins, M;Barzilai, N;Rossetti, L
通讯作者: Rossetti, L