Effect of vitamin D
) on human leukemia (HL-60) cells. HL-60 cells were cultured with different doses of Vit D3 for 24 hr as indicated in the Materials and Methods. Cell viability was determined based on the MTT assay. Each point represents a mean value and standard deviation of 3 experiments with 6 replicates per dose. *Significantly different (p < 0.05) from the control, according to the Dunnett’s test.