Paraoxonase 1 gene Q192R polymorphism affects stroke and myocardial infarction risk

L Baum, HK Ng, KS Wong, B Tomlinson, TH Rainer, X Chen, WS Cheung, DKY Chan, Graham Thomas

    Research output: Contribution to journalArticle

    46 Citations (Scopus)


    OBJECTIVES: Paraoxonase (PON1), an enzyme associated with high-density lipoprotein (HDL) particles, inhibits oxidation and atherogenesis. We sought to investigate the association of the PON1 Q192R polymorphism with stroke and heart disease. DESIGN AND METHODS: In a case control study, we genotyped 242 ischemic stroke, 231 myocardial infarction (MI), and 310 healthy control subjects, all Chinese. RESULTS: R-containing genotypes (R+) were associated with vascular disease, OR = 1.5, P = 0.03. RR was increased in MI patients who were either smokers (OR = 3.1, P = 0.01), male, or younger than 60. R+ but not RR genotypes were increased in stroke patients, particularly large artery type (OR = 2.6 and P = 0.02 for R+, OR = 1.0 for RR) or among smokers. The relative dearth of RR in stroke might be due to earlier MI or death in at-risk people, such as smokers. R+ genotypes were increased with stroke in hypertensive (OR = 2.1, P = 0.02) but not normotensive (OR = 1.0) subjects. CONCLUSIONS: PON1 192R+ genotypes were associated with stroke and MI, particularly in subsets of patients, in patterns suggesting a possible survivor effect.
    Original languageEnglish
    Pages (from-to)191-195
    Number of pages5
    JournalClinical Biochemistry
    Publication statusPublished - 1 Mar 2006


    Dive into the research topics of 'Paraoxonase 1 gene Q192R polymorphism affects stroke and myocardial infarction risk'. Together they form a unique fingerprint.

    Cite this