4.6 Article

SERPINB8 and furin regulate ITGAX expression and affect the proliferation and invasion of melanoma cells

Journal

EXPERIMENTAL DERMATOLOGY
Volume 32, Issue 1, Pages 24-29

Publisher

WILEY
DOI: 10.1111/exd.14677

Keywords

BRAF V600E mutant; integrin; invasion; melanoma

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This study characterized the function and interaction of ITGAX, SERPINB8, and furin in BRAF V600E mutant melanoma. It was found that SERPINB8 and furin regulate the expression of ITGAX, which significantly promotes the proliferation and invasion of melanoma cells.
In the past 10 years, the systemic treatment of advanced melanoma has undergone tremendous changes through the development of targeted therapy. However, there is still a long way to go. This study aims to characterize the function and interaction of ITGAX, SERPINB8 and furin in BRAF V600E mutant melanoma. Differentially expressed genes related to BRAF V600E mutation and BRAFi treatment were obtained by analysing GSE141484 and GSE22838. two kinds of BRAFi (Vemurafenib, 10 mu M; Dabrafenib, 1 mu M) were used to treat A375 and 1205Lu cells, respectively. The expression of ITGAX, SERPINB8 and Furin in A375 and 1205Lu cells was down-regulated by specific siRNAs, and cell proliferation, clone formation and invasion were detected by CCK-8, colony formation and transwell assays. The physical binding of furin and SERPINB8 was detected by immunoprecipitation. BRAFi treatment down-regulated the ITGAX and SERPINB8 expression and did not change furin expression. Knockdown of ITGAX and SERPINB8 both inhibited the proliferation and invasion of A375 and 1205Lu cells. Knocking down SERPINB8 down-regulated the expression of ITGAX. Furin knockdown and inhibitors all up-regulated the protein level of ITGAX. SERPINB8 can physically bind to furin. In summary, SERPINB8 and furin regulate the expression of ITGAX in melanoma cells, and ITGAX significantly promotes the proliferation and invasion of melanoma cells.

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