the tumor-promoting phorbol ester 12-o-tetradecanoyl-phorbol-13-acetate ( tpa ) increases 25-hydroxyvitamin d3 ( 25ohd3 ) -24-hydroxylase and decreases 25ohd3-1-hydroxylase activity in cultured kidney cells , effects similar to those exerted by 1,25-dihydroxyvitamin d3 [ 1,25- ( oh ) 2d3 ] and opposite those of pth , forskolin , and camp .
C0006657
25-hydroxyvitamin d3
C2713074
25ohd3