Plasma Bilirubin and UGT1A1*28 Are Not Protective Factors Against First-Time Myocardial Infarction in a Prospective, Nested Case-Referent Setting

被引:31
作者
Ekblom, Kim [1 ]
Marklund, Stefan L. [1 ]
Jansson, Jan-Hakan [3 ]
Osterman, Pia [1 ]
Hallmans, Goran [2 ]
Weinehall, Lars [2 ]
Hultdin, Johan [1 ]
机构
[1] Umea Univ, Dept Med Biosci, SE-90185 Umea, Sweden
[2] Umea Univ, Dept Publ Hlth & Clin Med, SE-90185 Umea, Sweden
[3] Skelleftea Cty Hosp, Skelleftea, Sweden
关键词
bilirubin; myocardial infarction; risk factors; epidemiology; CORONARY-ARTERY-DISEASE; GENOME-WIDE ASSOCIATION; LOW SERUM BILIRUBIN; HEART-DISEASE; CARDIOVASCULAR-DISEASE; APOLIPOPROTEIN-B; HEME OXYGENASE-1; INCREASED RISK; MAJOR GENE; UGT1A1;
D O I
10.1161/CIRCGENETICS.109.861773
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background-Bilirubin, an effective antioxidant, shows a large variation in levels between individuals and has been positively associated with reduced cardiovascular disease risk. A major reason for the variability is a common promoter polymorphism, UGT1A1*28, which reduces the transcription of the enzyme that conjugates bilirubin, UDP-glucuronosyltransferase 1A1. The aim of the study was to evaluate a possible protective effect of plasma bilirubin and the UGT1A1*28 polymorphism against myocardial infarction in a prospective case-referent setting. Methods and Results-Subjects (n=618) with a first-ever myocardial infarction (median event age, 60.5 years; median lag time, 3.5 years) and 1184 matched referents were studied. Plasma bilirubin was lower in cases versus referents. Despite a strong gene-dosage effect on bilirubin levels in both cases and referents, the UGT1A1*28 polymorphism did not influence the risk of myocardial infarction. Among multiple other variables, serum iron showed one of the strongest associations with bilirubin levels. Conclusions-We found no evidence for a protective effect of the UGT1A1*28 polymorphism against myocardial infarction and consequently neither for bilirubin. The lower bilirubin levels in cases might be caused by decreased production, increased degradation, or increased elimination. (Circ Cardiovasc Genet. 2010;3:340-347.)
引用
收藏
页码:340 / U100
页数:10
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