Melanocyte-specific gene 1 promotes melanoma progression by enhancing the expression of Bcl-2

: Malignant melanoma is a class of highly malignant tumors derived from melanocytes. At present, the dysregulated gene expression involved in the progression of melanoma has attracted much attention. In the present study, the gene expression profile of human melanoma tissue was screened using a cDNA microarray, and it was identified that melanocyte-specific gene 1 (MSG1) was significantly overexpressed in melanoma tissue compared with paired nevus tissues. The overexpression of MSG1 in melanoma was subsequently confirmed using immunohistochemistry in a set of melanoma tissues. It was additionally identified that the overexpression of MSG1 may promote cell viability and inhibit cell apoptosis in human melanoma A375 cells, thus promoting melanoma progression. Mechanistically, following screening of the expression of apoptosis-associated proteins, MSG1 was demonstrated to enhance the expression of the apoptosis inhibitor B-cell lymphoma 2 (Bcl-2) to inhibit melanoma cell apoptosis. Therefore, it was concluded that the overexpression of MSG1 inhibits apoptosis by enhancing Bcl-2 expression in malignant melanoma, thus promoting melanoma progression.