the phosphodiesterases of fat cells from normal and hypothyroid rats respond identically in vitro to propylthiouracil , triiodothyronine , methylisobutylxanthine , or theophylline , although the particulate low k-m cyclic amp phosphodiesterase is inhibited to a greater extent than soluble cyclic guanosine 3':5'-monophosphate phosphodiesterase activity .
C0020676
hypothyroid
C0041014
triiodothyronine