DEMONSTRATION OF POTENT LIPID-LOWERING ACTIVITY BY A THYROMIMETIC AGENT DEVOID OF CARDIOVASCULAR AND THERMOGENIC EFFECTS

A potent lipid-lowering thyromimetic (CGS 26214) devoid of cardiac and thermogenic activity was identified based on its ability to preferent ially access and bind the nuclear fraction of hepatocytes over that of myocytes in culture. The difference in access achieved with CGS 26214 was at least 100-fold better for hepatocytes than for myocytes. This in vitro hepatoselectivity resulted in a compound with unprecedented i n vivo lipid-lowering potency with a minimal effective dose of 1 mu g/ kg in rats and dogs (similar to 25x that of L-T-3). At the same time, CGS 26214 was free of any cardiovascular effects up to the highest dos e tested of 25 mg/kg and 100 mu g/kg in rats and dogs, respectively.