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Melanocortin 1 receptor regulates melanoma cell migration by controlling syndecan-2 expression

Title
Melanocortin 1 receptor regulates melanoma cell migration by controlling syndecan-2 expression
Authors
Chung H.Lee J.-H.Jeong D.Han I.-O.Oh E.-S.
Ewha Authors
오억수
SCOPUS Author ID
오억수scopus
Issue Date
2012
Journal Title
Journal of Biological Chemistry
ISSN
0021-9258JCR Link
Citation
vol. 287, no. 23, pp. 19326 - 19335
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The melanocortin 1 receptor (MC1R), a key regulator of melanogenesis, is known to control inflammation, acting in concert with the MC1R ligand α-melanocyte-stimulating hormone. Although cell migration is a key event in inflammation, few studies have addressed the function of MC1R in this context. Using highly motile melanoma cells, we found that the expression level of MC1R was associated with the extent of migration of mouse melanoma cells, suggesting that MC1R plays a functional role in controlling this migration. Overexpression of MC1R enhanced melanoma cell migration, whereas the opposite was true when MC1R levels were knocked down using small inhibitory RNAs. Interestingly, MC1R expression enhanced the synthesis of syndecan-2, a cell surface heparan sulfate proteoglycan known to be involved in melanoma cell migration. Knockdown of syndecan-2 expression decreased MC1R-mediated cell migration. Further, MC1R inhibited the activation of p38 MAPK, subsequently enhancing expression of sydnecan-2, in parallel with an increase in the extent of cell migration. Consistently, activation of p38 by H2O2 inhibited syndecan-2 expression and cell migration, whereas inhibition of p38 activation enhanced syndecan-2 expression and cell migration. Finally, we found that α-melanocyte-stimulating hormone inhibited MC1R-mediated cell migration via activation of p38 and inhibition of syndecan-2 expression. Together, the data strongly suggest that MC1R regulates melanoma cell migration via inhibition of syndecan-2 expression. © 2012 by The American Society for Biochemistry and Molecular Biology, Inc.
DOI
10.1074/jbc.M111.334730
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자연과학대학 > 생명과학전공 > Journal papers
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