in adrenalectomized rats , the tumor-promoting phorbol ester 12-o-tetradecanoylphorbol 13-acetate ( tpa ) markedly enhanced the inductions of tyrosine aminotransferase ( tat ) and ornithine decarboxylase by glucocorticoids , even with sufficient concentration of glucocorticoids to have a maximal effect , whereas it had no effect on tat activity and increased ornithine decarboxylase activity only slightly in the absence of glucocorticoids .
C0031586
phorbol ester
C0039654
12-o-tetradecanoylphorbol 13-acetate