건강한 성인남녀의 혈청 γ-glutamyltransferase (γ-GT)와 혈청 페리틴과의 연관성

Abstract

Background : Serum γ-GT is one of the biliary enzymes with the only enzymatic activity capable of cleaving extracellular glutathione, thus originating precursor amino acids for the intracellular resynthesis of glutathione. Several population-based studies have shown a strong cross-sectional association between serum γ-GT concentration and cardiovascular risk factors. And prospective studies showed that serum γ-GT concentration had a prognostic impact on cardiovascular mortality. But, the mechanism by which γ-GT is associated with cardiovascular disease is not elucidated. We hypothesized that there was an association between serum γ-GT and ferritin, a marker of oxidative stress. In this study, we investigated the relationship between serum γ-GT and serum ferritin.

Methods : By reviewing the medical records of 288 healthy adults, we determined the serum levels of γ-GT and ferritin according to age, body mass index, systolic blood pressure, diastolic blood pressure, triglycerides, total cholesterol, LDL-cholesterol, fasting blood sugar, hs-CRP, serum ferritin, AST, ALT, uric acid and smoking history. We studied the relationship between the variables by Pearson correlation coefficients and multiple stepwise regression analysis. Mean values of serum γ-GT according to the smoking history were compared using t-test.

Results : Serum γ-GT correlated positively with serum ferritin (r=0.42; P＜0.001). BMI, triglycerides, total cholesterol, fasting blood sugar, AST and ALT also showed statistically significant correlation. Smokers showed significantly higher serum γ-GT. Serum γ-GT correlated with serum ferritin, ALT, current smoking and triglycerides by multiple stepwise regression analysis.