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Learn MoreBackground: UV exposure-induced oxidative stress is implicated as the driving mechanism for melanoma. Increased oxidative stress results in DNA damage and epigenetic modifications. We wondered whether a low dose of antioxidant could attenuate the oxidative stress of and help cells respond to epigenetic modification treatment at a lower dose. Sulforaphane (SFN) is a natural bioactivated product of the cruciferous family and is known as an antioxidant. We investigated the combinational effect of SFN and epigenetic modification drug, 5-aza-2'-deoxycytidine (DAC), on metastatic melanoma growth.; Methods: Cell growth characteristics, RNA-seq and histone post-translational modification markers (PTMs) were compared in single and combination treatments.; Results: We found increased cell growth inhibition and changes in gene expression profiles which includes a key immuno-regulator cytokine, C-C motif ligand 5 (CCL-5) gene expression upon combinational treatments. There was no significant difference in detectable histone PTMs between treatments.; Conclusions: These results indicate a potential combinational effect of a dietary antioxidant and an FDA-approved epigenetic drug in controlling melanoma growth. The long-term goal of the current study is to find the therapeutic role of the dietary antioxidant SFN as a supporting drug for targeted epigenetic treatment with DAC in controlling melanoma growth. SOURCE: Tung-chin Chiang (tchiang@uams.edu) - UAMS
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