CYP2C9 allelic variants: ethnic distribution and functional significance

Adv Drug Deliv Rev. 2002 Nov 18;54(10):1257-70. doi: 10.1016/s0169-409x(02)00076-5.


Cytochrome P-450 (CYP) 2C9 CYP2C9 is a polymorphically expressed enzyme responsible for the metabolism of several clinically important drugs, some with a low therapeutic index. This review summarizes the structure-function relationship of the CYP2C9 promoter and coding regions, known polymorphisms, the functional significance of various CYP2C9 alleles in vitro and in vivo, and their population frequencies. In addition, possible molecular mechanisms underlying ethnic variability in the metabolism of CYP2C9 substrate drugs are discussed.

Publication types

  • Research Support, U.S. Gov't, P.H.S.
  • Review

MeSH terms

  • African Continental Ancestry Group / genetics*
  • Aryl Hydrocarbon Hydroxylases / genetics*
  • Asian Continental Ancestry Group / genetics*
  • Cytochrome P-450 CYP2C9
  • European Continental Ancestry Group / genetics*
  • Gene Frequency / genetics
  • Humans
  • Polymorphism, Genetic*
  • Promoter Regions, Genetic
  • Substrate Specificity


  • CYP2C9 protein, human
  • Cytochrome P-450 CYP2C9
  • Aryl Hydrocarbon Hydroxylases