4.7 Article

Insulin promotes proliferation, survival, and invasion in endometrial carcinoma by activating the MEK/ERK pathway

期刊

CANCER LETTERS
卷 322, 期 2, 页码 223-231

出版社

ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2012.03.026

关键词

Endometrial carcinoma; Insulin; MEK/ERK pathway; Proliferation; Invasion

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资金

  1. Nature Science Fund of China [30772316]
  2. Specialized Research Fund for the Doctoral Program of Higher Education of China [20070062006]

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The involvement of insulin in endometrial carcinoma (EC) was investigated using radioimmunoassay, Western blot, immunoprecipitation, MTT, and Annexin V-FITC/PI assays in tissue samples and cultured cells. Serum levels of insulin, p-p52Shc, p-p46Shc, Shc.Grb2 complexes, p-MEK, p-ERK, and cyclin D1 were elevated in patients with EC. Expression of key proteins in the MEK/ERK pathway, including p-p52Shc, Shc.Grb2 complexes, p-MEK, p-ERK, and cyclin D1, was significantly higher in patients with advanced FIGO stage, high grade, and lymph-node metastasis and correlated positively with serum insulin concentration. Insulin promotes Ishikawa 3-H-12 cell proliferation, survival, and invasion, and these effects induced by insulin were significantly blocked by MEK inhibitor PD98059. Insulin thus promotes EC cell proliferation, survival, and invasion via the MEK/ERK pathway. (C) 2012 Elsevier Ireland Ltd. All rights reserved.

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