Journal
CLINICAL GENETICS
Volume 67, Issue 2, Pages 175-177Publisher
WILEY
DOI: 10.1111/j.1399-0004.2004.00388.x
Keywords
atherosclerosis; lipoproteins; metabolism; mutation; pharmacogenetics
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Ezetimibe reduces plasma low-density lipoprotein (LDL) cholesterol by blocking sterol absorption in enterocytes. The NPC1L1 gene product was recently identified as the molecular target for ezetimibe, although functional details are incomplete. We used the non-response phenotype of plasma LDL cholesterol to ezetimibe treatment to ascertain individuals who might have variant NPC1L1. We found that one non-responder to ezetimibe was a compound heterozygote for two rare non-synonymous polymorphisms in NPC1L1 that were absent in normal control subjects. We also characterized other NPC1L1 polymorphisms. While there are many explanations for non-response to medications, our data suggest a possible relationship between NPC1L1 variation and ezetimibe response and further indicate that a non-response phenotype might ascertain subjects with genomic DNA variants that could help define metabolic pathways.
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