title: Actinomycin D Inhibition of Vitamin D Action.
abstract: Injection of actinomycin D into rats completely prevents both the rise in serum calcium normally induced by vitamin D and the increased transport of calcium by everted intestinal sacs. Injection of excess parathyroid hormone did not alter this result; this eliminates the possibility that the inhibition of vitamin action was due to blocked hormone synthesis. As a result of these findings, a hypothesis concerning the mechanism of action of vitamin D is presented.
authors.forename: J E
authors.initials: JE
authors.lastname: Zull
authors.forename: E
authors.initials: E
authors.lastname: Czarnowska-Misztal
authors.forename: H F
authors.initials: HF
authors.lastname: Deluca