NCIt definition : An analog of calcitriol and a vitamin D3 receptor (VDR) agonist, with potential antineoplastic
activity. Upon administration, inecalcitol targets and binds to VDR. This activates
VDR and VDR-mediated signal transduction pathways. This modulates the VDR-mediated
expression of certain genes, including the expression of anti-cancer genes, enhances
cellular differentiation, induces tumor cell apoptosis and inhibits tumor cell growth.
VDR plays a central role in calcium homeostasis and in the growth of certain cancer
cells.;