title: Serum high concentrations of homocysteine and low levels of folic acid and vitamin B12are significantly correlated with the categories of coronary artery diseases.
abstract: Homocysteine (Hcy) has been considered as an independent risk factor for coronary artery disease (CAD). Folic acid and vitamin B12are two vital regulators in Hcy metabolic process. We evaluated the correlations between serum Hcy, folic acid and vitamin B12with the categories of CAD.
  
  
  
  Serum Hcy, folic acid and vitamin B12from 292 CAD patients, including 73 acute myocardial infarction (AMI), 116 unstable angina pectoris (UAP), 103 stable angina pectoris (SAP), and 100 controls with chest pain patients were measured, and the data were analyzed by SPSS software.
  
  
  
  Compared to SAP patients, patients with AMI and UAP had higher Hcy levels with approximately average elevated (4-5) μmol/L, while SAP patients were approximately higher 8 μmol/L than controls. However, the levels of folic acid and vitamin B12had opposite results, which in AMI group was the lowest, while in controls was the highest. CAD categories were positively correlated with Hcy (r = 0.286, p < 0.001), and negatively correlated with folic acid (r = -0.297, p < 0.001) and vitamin B12(r = -0.208, p < 0.001). There were significant trend toward increase in the prevalence of high Hcy, low folic acid and vitamin B12from controls, to SAP, to UAP, and to AMI.
  
  
  
  The present study provide the valuable evidence that high concentrations of Hcy and low levels of folic acid and vitamin B12are significantly correlated with CAD categories.
authors.affiliation: East Branch, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, No. 585 Hong He North Road, Longquan District, Chengdu, 610101, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Ma
authors.affiliation: East Branch, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, No. 585 Hong He North Road, Longquan District, Chengdu, 610101, China.
authors.forename: Duanliang
authors.initials: D
authors.lastname: Peng
authors.affiliation: Department of Clinical Laboratory, Chengdu Women's and Children's Central Hospital, Chongqing Medical University, No. 1617 Ri Yue Avenue, Qingyang District, Chengdu, 610091, China. lablcg@126.com.
authors.forename: Chenggui
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Clinical Laboratory, Chengdu Women's and Children's Central Hospital, Chongqing Medical University, No. 1617 Ri Yue Avenue, Qingyang District, Chengdu, 610091, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Huang
authors.affiliation: East Branch, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, No. 585 Hong He North Road, Longquan District, Chengdu, 610101, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Luo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood; D002681:China / Q000453:epidemiology; D003324:Coronary Artery Disease / Q000097:blood* / Q000175:diagnosis / Q000453:epidemiology; D005260:Female; D005492:Folic Acid / Q000097:blood*; D005500:Follow-Up Studies; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D015415:Biomarkers; D006710:Homocysteine; D005492:Folic Acid; D014805:Vitamin B 12
keywords: Atherosclerosis; Coronary artery disease; Endothelial dysfunction; Folic acid; Homocysteine; Vitamin B12