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Adiponectin represses colon cancer cell proliferation via AdipoR1- and -R2-mediated AMPK activation

Title
Adiponectin represses colon cancer cell proliferation via AdipoR1- and -R2-mediated AMPK activation
Authors
Kim A.Y.Lee Y.S.Kim K.H.Lee J.H.Lee H.K.Jang S.-H.Kim S.-E.Lee G.Y.Lee J.-W.Jung S.-A.Chung H.Y.Jeong S.Kim J.B.
Ewha Authors
정성애김성은
SCOPUS Author ID
정성애scopus; 김성은scopus
Issue Date
2010
Journal Title
Molecular Endocrinology
ISSN
0888-8809JCR Link
Citation
vol. 24, no. 7, pp. 1441 - 1452
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
In obesity, dysregulation of adipocytokines is involved in several pathological conditions including diabetes and certain cancers. As a member of the adipocytokines, adiponectin plays crucial roles in whole-body energy homeostasis. Recently, it has been reported that the level of plasma adiponectin is reduced in several types of cancer patients. However, it is largely unknown whether and how adiponectin affects colon cancer cell growth. Here, we show that adiponectin suppresses the proliferation of colon cancer cells including HCT116, HT29, and LoVo. In colon cancer cells, adiponectin attenuated cell cycle progression at the G1/S boundary and concurrently increased expression of cyclin-dependent kinase inhibitors such as p21 and p27. Adiponectin stimulated AMP-activated protein kinase (AMPK) phosphorylation whereas inhibition of AMPK activity blunted the effect of adiponectin on the proliferation of colon cancer cells. Furthermore, knockdown of adiponectin receptors such as AdipoR1 and AdipoR2 relieved the suppressive effect of adiponectin on the growth of colon cancer cells. In addition, adiponectin repressed the expression of sterol regulatory element binding protein-1c, which is a key lipogenic transcription factor associated with colon cancers. These results suggest that adiponectin could inhibit the growth of colon cancer cells through stimulating AMPK activity. Copyright © 2010 by The Endocrine Society.
DOI
10.1210/me.2009-0498
Appears in Collections:
의학전문대학원 > 의학과 > Journal papers
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