Mice Expressing the Human CYP7A1 Gene in the Mouse CYP7A1 Knock-out Background Lack Induction of CYP7A1 Expression by Cholesterol Feeding and Have Increased Hypercholesterolemia When Fed a High Fat Diet

Abstract excerpt

Cholesterol 7alpha-hydroxylase (CYP7A1) catalyzes the rate-limiting step in the pathway responsible for the formation of the majority of bile acids. Transcription of the gene is regulated by the size of the bile acid pool and dietary and hormonal factors. The farnesoid X receptor and the liver X receptor (LXR) are responsible for regulation by bile acids and cholesterol, respectively. To study the effects of...

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