Background: Epidemiological studies suggest that the Zinc-α-2-glycoprotein (ZAG) plays significant physiological roles. In this study we investigate whether ZAG could be considered as a clinical biomarker in the diagnosis and prognosis of metabolic syndrome (MetS) in Saudi population. As such insights urgently required for management of MetS. Thus, we have determined serum levels of ZAG in patients with MetS and normal individuals. We have also assessed the association between ZAG and different components of MetS. Methodology: Clinical information of 200 Saudi male and female subjects (age range 30-65) with MetS (n=100) and healthy controls (n=100) were extracted from the database of the Chair of Biomarkers of Chronic Disease (CBCD) in King Saud University (KSU), Riyadh, Saudi Arabia. MetS was screened according to NCEP ATP III criteria (National Cholesterol Education Program Adult Treatment Panel III). Fasting glucose and lipid profile levels were measured using Konelab. Serum TNF-α, IL- 6, CRP and ZAG levels were measured using commercially available assays.Results: There was age-dependent significant increase in ZAG level among MetS subjects than controls (43.8 ± 19.5 vs 48.1 ± 14.8; p = 0.04). This study demonstrates, a significant inverse association between ZAG and serum HDL-cholesterol (R= -0.20, p<0.05). Whereas, triglycerides (R= 0.25, p<0.01), waist circumference (WHR) (R= 0.17, p<0.05) and CRP (R= 0.24, p<0.01) were all significantly and positively associated with ZAG. Conclusion: High level of circulating ZAG is associated with MetS in age dependent manner. Serum ZAG might be a biomarker for MetS screening.
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