title: Plasma homocysteine, MTHFR C677T, CBS 844ins68bp, and MTHFD1 G1958A polymorphisms in spontaneous cervical artery dissections.
abstract: Mild hyperhomocysteinemia is a probable risk factor for atherosclerotic diseases and stroke. Recently, associations of elevated plasma homocysteine concentrations in the acute phase and of MTHFR 677 TT genotype with spontaneous cervical artery dissections (sCAD) have been reported. The purpose of this study was to test this hypothesis in the currently largest sample of patients with sCAD, taking into account known factors influencing plasma homocysteine levels. Ninety-five patients with past sCAD were compared with 95 age- and sex-matched healthy individuals. Homocysteine, vitamin B6, B12, folate, and polymorphisms of methylenetetrahydrofolate reductase (MTHFR C677T), cystathionine beta-synthase (CBS 844ins68bp) and methylenetetrahydrofolate dehydrogenase/methenyltetrahydrofolate cyclohydrolase/formyltetrahydrofolate synthetase (MTHFD1 G1958A) were assessed and any associations were analysed using multivariate statistics. The occurrence of sCAD was associated with elevated homocysteine levels with an odds ratio of 1.327 per 20 % percentile. Homocysteine levels were influenced by gender, smoking status, occurrence of hypertension, vitamin B12 and folate levels, and by the MTHFR TT genotype. MTHFR, CBS 844ins68bp, and MTHFD1 G1958A genotype were not independently associated with the occurrence of sCAD. These data suggest that elevated homocysteine is associated with the occurrence of sCAD. The MTHFR C677T polymorphism is associated with the homocysteine level.
authors.affiliation: Department of Neurology, University of Münster, Albert-Schweitzer-Str. 11, 48149 Münster, Germany. konradc@uni-muenster.de
authors.forename: Carsten
authors.initials: C
authors.lastname: Konrad
authors.forename: Georg A
authors.initials: GA
authors.lastname: Müller
authors.forename: Claus
authors.initials: C
authors.lastname: Langer
authors.forename: Gregor
authors.initials: G
authors.lastname: Kuhlenbäumer
authors.forename: Klaus
authors.initials: K
authors.lastname: Berger
authors.forename: Darius G
authors.initials: DG
authors.lastname: Nabavi
authors.forename: Rainer
authors.initials: R
authors.lastname: Dziewas
authors.forename: Florian
authors.initials: F
authors.lastname: Stögbauer
authors.forename: Erich B
authors.initials: EB
authors.lastname: Ringelstein
authors.forename: Ralf
authors.initials: R
authors.lastname: Junker
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D003541:Cystathionine beta-Synthase / Q000235:genetics*; D004252:DNA Mutational Analysis / Q000379:methods; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D005260:Female; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008754:Methylenetetrahydrofolate Dehydrogenase (NADP) / Q000235:genetics*; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D008875:Middle Aged; D011110:Polymorphism, Genetic; D011624:Pteroylpolyglutamic Acids / Q000097:blood; D012333:RNA, Messenger / Q000378:metabolism; D012189:Retrospective Studies; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D018709:Statistics, Nonparametric; D020217:Vertebral Artery Dissection / Q000097:blood* / Q000235:genetics*; D014805:Vitamin B 12 / Q000097:blood; D025101:Vitamin B 6 / Q000097:blood
chemical_list: D011624:Pteroylpolyglutamic Acids; D012333:RNA, Messenger; D006710:Homocysteine; D025101:Vitamin B 6; D042965:Methylenetetrahydrofolate Reductase (NADPH2); D008754:Methylenetetrahydrofolate Dehydrogenase (NADP); D003541:Cystathionine beta-Synthase; D014805:Vitamin B 12