Hypolipidemic effect of NS-1 and other related drugs in rhesus monkeys

Abstract NS-1, 4-[2-(4-isopropylbenzamido)ethoxy]benzoic acid, is a novel chemical compound which has been found to be a potent hypolipidemic agent in rhesus monkeys. Significant reductions in serum cholesterol and phospholipids were observed in normolipidemic monkeys following oral doses of 30–300 mg/kg/day. A dose of 300 mg/kg/day for 28 days lowered serum cholesterol and phospholipid levels by 49% and 41%, respectively. NS-1 was more potent than clofibrate, clinofibrate, simfibrate, bezafibrate, gemfibrozil, nicomol and probucol in hypolipidemic activity in the same model. Lipoprotein analysis showed that NS-1 reduced low density lipoprotein much more than high density lipoprotein. The results suggest that NS-1 may have hypolipidemic activity in hyperlipidemic patients.