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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Aged, Aryldialkylphosphatase, Case-Control Studies, Female, Genetic Predisposition to Disease, Genotype, Humans, Male, Myocardial Infarction, Polymorphism, Genetic, Regression Analysis, Stroke.
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Does paraoxonase 1 gene Q192R polymorphism affect stroke and myocardial infarction risk? Context: 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. In a case control study, we genotyped 242 ischemic stroke, 231 myocardial infarction (MI), and 310 healthy control subjects, all Chinese. 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.
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PON1 192R+ genotypes were associated with stroke and MI, particularly in subsets of patients, in patterns suggesting a possible survivor effect. Final Decision: yes