title: Association between serum gamma-glutamyltransferase and C-reactive protein.
abstract: A series of epidemiological studies have suggested serum gamma glutamyltransferase (GGT) within its normal range might be an early marker of oxidative stress. Oxidative stress appears to be a key component of many reactions associated with chronic inflammation. Therefore, we examined the cross-sectional association between deciles of serum GGT and concentrations of serum C-reactive protein (CRP), a marker of chronic inflammation, among 12,110 adult participants in the third U.S. National Health and Nutrition Examination Survey. After adjustment for race, sex, age, cigarette smoking, alcohol intake, and body mass index (BMI), serum concentration of GGT across all deciles was positively associated with serum concentrations of CRP (P for trend<0.01). For example, adjusted relative risks of serum CRP> or =3.0mg/L by deciles of serum GGT were 1.0, 1.23, 1.40, 1.59, 1.62, 1.61, 2.17, 2.38, 2.45, and 3.41 (P for trend<0.01). This association was consistently observed among all subgroups; Non-Hispanic White, Non-Hispanic Black, Mexican American, men, women, non-drinkers, drinkers, non-smokers, ex-smokers, current smokers, BMI<25, BMI 25-29.9, and BMI> or =30. The strong association of serum GGT and CRP suggest that further studies on cellular and/or serum GGT might help to elucidate the association between oxidative stress and inflammation.
authors.affiliation: Department of Preventive Medicine, Division of Preventive Medicine and Health Promotion Research Center, School of Medicine, Kyungpook National University, 101 Dongin-dong, Jung-gu, Daegu 700 422, Korea. lee_dh@knu.ac.kr
authors.forename: Duk-Hee
authors.initials: DH
authors.lastname: Lee
authors.forename: David R
authors.initials: DR
authors.lastname: Jacobs
mesh_terms: D000368:Aged; D015415:Biomarkers / Q000097:blood*; D015992:Body Mass Index; D002097:C-Reactive Protein / Q000032:analysis*; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D005006:Ethnicity; D005260:Female; D006306:Health Surveys; D006801:Humans; D007249:Inflammation; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress; D012307:Risk Factors; D005723:gamma-Glutamyltransferase / Q000097:blood*
chemical_list: D015415:Biomarkers; D002097:C-Reactive Protein; D005723:gamma-Glutamyltransferase