however , in contrast to previous studies , we have also demonstrated that induction of hl-60 differentiation with dimethyl sulfoxide , hexamethylene bisacetamide , butyric acid , or retinoic acid is inhibited by alpha-difluoromethyl ornithine ( dfmo ) depletion of intracellular putrescine and spermidine .
C1516343
induction
C0040845
retinoic acid