CYP2C19 and PON1 polymorphisms regulating clopidogrel bioactivation in Chinese, Malay and Indian subjects.

Journal Article (Journal Article)

UNLABELLED: AIM, MATERIALS & METHODS: We investigated the functional significance of CYP2C19*2, *3, *17 and PON1 Q192R SNPs in 89 consecutive Asian patients on clopidogrel treatment and the prevalence of functionally significant polymorphisms among 300 Chinese, Malays and Asian Indians. RESULTS: Both CYP2C19 loss-of-function alleles (*2 or *3) were associated with higher platelet reactivity while the CYP2C19 gain-of-function allele (*17) had lower platelet reactivity. For PON1, the median PRI was not significantly different between the QQ, QR and RR groups. The allele frequencies of CYP2C19*2, CYP2C19*3 and CYP2C19*17 were 0.280, 0.065 and 0.010 (rare) for Chinese, 0.310, 0.050 and 0.025 for Malays, and 0.375, 0.010 (rare) and 0.165 for Indians, respectively. CONCLUSION: Our data suggest that genotyping studies to investigate clopidogrel response should include CYP2C19*2 and *3 but not *17 polymorphisms in Chinese, and CYP2C19*2 and *17 polymorphisms but not *3 in Indians. All three polymorphisms should preferably be genotyped in Malays.

Full Text

Duke Authors

Cited Authors

  • Chan, MY; Tan, K; Tan, H-C; Huan, P-T; Li, B; Phua, Q-H; Lee, H-K; Lee, C-H; Low, A; Becker, RC; Ong, W-C; Richards, MA; Salim, A; Tai, E-S; Koay, E

Published Date

  • April 2012

Published In

Volume / Issue

  • 13 / 5

Start / End Page

  • 533 - 542

PubMed ID

  • 22462746

Electronic International Standard Serial Number (EISSN)

  • 1744-8042

Digital Object Identifier (DOI)

  • 10.2217/pgs.12.24


  • eng

Conference Location

  • England