title: Genetic polymorphism of 5,10-MTHFR reductase gene in offspring of patients with myocardial infarction.
abstract: A family history of myocardial infarction is a major determinant of ischemic disease. A C->T677 polymorphism in the methylenetetrahydrofolate reductase (MTHFR) gene has been identified as a cause of mild hyperhomocysteinemia, a risk factor for arterial thrombosis. We have investigated the relationship between the MTHFR TT genotype and a family history of myocardial infarction in a cohort of 982 apparently healthy individuals. Subjects whose first-degree relatives suffered from a myocardial infarction, showed raised median age (p <0.001), total cholesterol (p <0.001) and plasma fibrinogen (p = 0.023) and a higher than normal frequency of C-reactive protein levels >0.33 mg/dl (p = 0.012). Moreover, when compared to subjects without such family history, a higher number of homozygotes for the T allele of the MTHFR gene (p = 0.027), and of the 4G allele of the plasminogen activator inhibitor-1 gene (p = 0.002) was found in the subsetting of the offspring of patients with myocardial infarction. In a multiple logistic regression analysis, age (OR 1.02 [95%-CI: 1.00-1.05]), total cholesterol (OR 1.40 [95%-CI: 1.14-1.71]), C-reactive protein levels >0.33 mg/l (OR: 1.87 [95%-CI: 1.10-3.20]), plasminogen activator inhibitor-1 4G/4G (OR: 1.84 [95%-CI: 1.27-2.66]), and MTHFR TT genotype (OR 1.62 [95%-CI: 1.08-2.42]), were all associated with a family history of myocardial infarction. Thus, the MTHFR TT genotype independently accounts for the risk of a family history for myocardial infarction in the present setting.
authors.affiliation: Unita' di Aterosclerosi e Trombosi, I.R.C.C.S., Casa Sollievo della Sofferenza, S. Giovanni Rotondo, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Margaglione
authors.forename: D
authors.initials: D
authors.lastname: Colaizzo
authors.forename: G
authors.initials: G
authors.lastname: Cappucci
authors.forename: A
authors.initials: A
authors.lastname: del Popolo
authors.forename: G
authors.initials: G
authors.lastname: Vecchione
authors.forename: E
authors.initials: E
authors.lastname: Grandone
authors.forename: G
authors.initials: G
authors.lastname: Di Minno
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D005260:Female; D006801:Humans; D008297:Male; D042965:Methylenetetrahydrofolate Reductase (NADPH2); D008875:Middle Aged; D009154:Mutation; D009203:Myocardial Infarction / Q000151:congenital / Q000235:genetics*; D000587:Oxidoreductases Acting on CH-NH Group Donors / Q000235:genetics*; D011110:Polymorphism, Genetic; D012307:Risk Factors
chemical_list: D000587:Oxidoreductases Acting on CH-NH Group Donors; D042965:Methylenetetrahydrofolate Reductase (NADPH2)