TY - JOUR T1 - Vitamin D3 derivatives inhibit the differentiation of Friend erythroleukemia cells. JF - Molecular Pharmacology JO - Mol Pharmacol SP - 639 LP - 642 VL - 30 IS - 6 AU - J K Wang AU - M D Johnson AU - J I Morgan AU - S Spector Y1 - 1986/12/01 UR - http://molpharm.aspetjournals.org/content/30/6/639.abstract N2 - A number of vitamin D3 metabolites inhibit benzodiazepine- and dimethyl sulfoxide-induced differentiation of Friend erythroleukemia cells. The inhibition is dose dependent and occurs at nM concentrations. The order of potency of these compounds is 1,25-dihydroxycholecalciferol greater than 1,25,26-trihydroxycholecalciferol greater than 1,24R,25-trihydroxycholecalciferol greater than 1 alpha-hydroxycholecalciferol greater than 24R,25-dihydroxycholecalciferol greater than 25S,26-dihydroxycholecalciferol. The inhibition is maximal when the vitamin D3 analogs are added together with the inducer, and becomes progressively decreased with delayed addition. These results suggest that the vitamin D3 metabolites may play a regulatory role in erythropoiesis. ER -