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NBME 29 Answers

nbme29/Block 1/Question#8 (reveal difficulty score)
Cholestyramine prevents the reabsorption of ...
Upregulating hepatic LDL receptors ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: biochem pharm lipids

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submitted by โˆ—namesthegame22(13)
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Bile acid resins (cholestyramine, colestipol, Colesevelam) decrease serum cholesterol by inhibiting bile acid recycling through the intestinal Lumen.

The decreased reabsorption of cholesterol results in decreased intrahepatic cholesterol concentrations; this causes the liver to increase the expression of the LDL receptors that bind plasma LDL and ultimately lower serum LDL/cholesterol.

vs. HMG-CoA reductase inhibitors (statins) = inhibiting hepatic cholesterol synthesis. They also ^ hepatic LDL receptors and thus decrease circulating levels of LDL.

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