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Adiponectin increases motility of human prostate cancer cells via adipoR, p38, AMPK, and NF‐κB pathways
Author(s) -
Tang ChihHsin,
Lu MuEn
Publication year - 2009
Publication title -
the prostate
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.295
H-Index - 123
eISSN - 1097-0045
pISSN - 0270-4137
DOI - 10.1002/pros.21029
Subject(s) - adiponectin , ampk , prostate cancer , cancer research , lncap , medicine , endocrinology , integrin , biology , cancer , microbiology and biotechnology , phosphorylation , protein kinase a , receptor , insulin , insulin resistance
Abstract BACKGROUND Prostate cancer is the most commonly diagnosed malignancy in men. Prostate cancer shows a predilection for metastasis to the bone. Adiponectin is a protein hormone secreted predominantly by differentiated adipocytes and involved in energy homeostasis. The aim of this study was to investigate whether adiponectin is associated with migration of prostate cancer cells. METHOD Cancer cells migration activity was examined using the Transwell assay. The p38 and AMPK phosphorylation was examined by using Western blot method. The cell surface expression of integrins was examined by using flow cytometry. The qPCR was used to examine the mRNA expression of integrin. A transient transfection protocol was used to examine NF‐κB activity. RESULTS We found that adiponectin increased the migration and the expression of α5β1 integrin of human prostate cancer cells. Adiponectin‐mediated migration and integrins expression was attenuated by p38 inhibitor (SB203580), p38 mutant, AMPK siRNA, AMPK inhibitor (araA and compound C). Activations of p38, AMPK and NF‐κB pathways after adiponectin treatment was demonstrated, and adiponectin‐induced expression of integrins and migration activity was inhibited by the specific inhibitor and mutant of p38, AMPK, and NF‐κB cascades. CONCLUSIONS This study showed for the first time that the adiponectin mediates migration of human prostate cancer cells. One of the mechanisms underlying adiponectin directed migration was transcriptional up‐regulation of α5β1 integrin and activation of AdipoR1 receptor, p38, AMPK, and NF‐κB pathways. Prostate 69: 1781–1789, 2009. © 2009 Wiley‐Liss, Inc.