The oxysterol-activated nuclear receptor liver X receptor alpha (LXRalpha) has been implicated in the control of both cholesterol and fatty acid metabolism. In this study, we have evaluated the effects of excess dietary cholesterol on hepatic cholesterol metabolism, lipogenesis, and VLDL production in homozygous (Lxralpha(-/-)), heterozygous (Lxralpha(+/-)), and wild-type mice. Mice were fed ei...