Vitamin D3 regulates NSUN2 expression and inhibits melanoma cell proliferation and migration.
PMID:
Mol Divers. 2023 Sep 9. Epub 2023 Sep 9. PMID: 37688740
Abstract Title:
Vitamin D3 regulates NSUN2 expression and inhibits melanoma cell proliferation and migration.
Abstract:
The activated form of vitamin D[1,25-dihydroxyvitamin D; 1,25(OH)D] is important for various physiological processes, such as bone mineralization and calcium metabolism, and plays an anticancer role in numerous cancers as well. Its role in melanoma cells has yet to be proven. NOP2/Sun RNA methyltransferase 2 (NSUN2) is a typical RNA methyltransferase and is highly expressed in a variety of cancer cells. However, the molecular mechanisms underlying the role of 1,25(OH)Dand NSUN2 in melanoma cells remain largely unknown. The current study showed that 1,25(OH)Dcould significantly and specifically inhibit the proliferation and migration of melanoma B16 cells. 1,25(OH)Denhances vitamin D receptor expression while simultaneously reducing NSUN2 expression in melanoma cells. Subsequently, knockdown of NSUN2 suppressed B16 cell proliferation and migration. RNA-Seq results illuminated that DNA replication, cell proliferation and cell cycle pathways were enriched, and genes promoting these pathways were reduced after knocking down Nsun2. Dual-luciferase reporter assays showed that 1,25(OH)Ddownregulated reporter gene expression was controlled by the Nsun2 promoter. The results suggest that 1,25(OH)Dbinds to the vitamin D response element located upstream of the Nsun2 promoter to downregulate Nsun2 transcription activity and then affects the gene expression pattern related to cell proliferation and the cell cycle, thereby restraining B16 cell proliferation and migration.
