A Novel Class of Antihyperlipidemic Agents with Low Density Lipoprotein Receptor Up-Regulation <i>via</i> the Adaptor Protein Autosomal Recessive Hypercholesterolemia
作者:Shigehiro Asano、Hitoshi Ban、Norie Tsuboya、Shinsaku Uno、Kouichi Kino、Katsuhisa Ioriya、Masafumi Kitano、Yoshihide Ueno
DOI:10.1021/jm901909p
日期:2010.4.22
We have previously reported compound 2 as a inhibitor of acyl-coenzyme A:cholesterol O-acyltransferase (ACAT) and up-regulator of the low density lipoprotein receptor (LDL-R) expression. In this study we focused on compound 2, a unique LDL-R up-regulator, and describe the discovery of a novel class of up-regulators of LDL-R. Replacement the methylene urea linker in compound 2 with an acylsulfonamide linker kept a potent LDL-R up-regulatory activity, and subsequent optimization work gave compound 39 as a highly potent LDL-R up-regulator (39; EC25 = 0.047 mu M). Compound 39 showed no ACAT inhibitory activity even at 1 mu M. The sodium salts of compound 39 reduced plasma total and LDL cholesterol levels in a dose-dependent manner in an experimental animal model of hyperlipidemia. Moreover, we revealed in this study using RNA interference that autosomal recessive hypercholesterolemia (ARH), an adaptor protein of LDL-R, is essential for compound 39 up-regulation of LDL-R expression.