Abstract
The activated form of vitamin D3 [1,25-dihydroxyvitamin D3; 1,25(OH)2D3] 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)2D3 and NSUN2 in melanoma cells remain largely unknown. The current study showed that 1,25(OH)2D3 could significantly and specifically inhibit the proliferation and migration of melanoma B16 cells. 1,25(OH)2D3 enhances 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)2D3 downregulated reporter gene expression was controlled by the Nsun2 promoter. The results suggest that 1,25(OH)2D3 binds 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.
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LW contributed to data collection and analyzing and manuscript writing. QZ contributed to cell culture and manuscript writing. JPW and HZL contributed to data analysis. WXZ contributed to conceptualization and methodology. TZ contributed to project administration and supervision. All authors reviewed the manuscript.
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Ling Wang and Qiang Zhang have contributed equally to this work and share first authorship.
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Wang, L., Zhang, Q., Wang, J. et al. Vitamin D3 regulates NSUN2 expression and inhibits melanoma cell proliferation and migration. Mol Divers (2023). https://doi.org/10.1007/s11030-023-10720-9
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DOI: https://doi.org/10.1007/s11030-023-10720-9