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Effect of DOX and DOX-Vit D on the expression of DR-4. MG63 cells were treated for 24 h with 10 µM DOX and DOX-Vit D. Thereafter, total RNA was isolated using TRIzol reagent, and the mRNA level of DR-4 was quantified using real time-PCR and normalized to a β-actin housekeeping gene. The results are presented as the mean ± SEM (n = 6). + p < 0.05 compared to control. * p < 0.05 compared to DOX.
