Abstract
OBJECTIVEDipeptidyl peptidase IV (DPP-IV) is not only important in β-cell function but also has proinflammatory actions. We aimed to investigate whether it could act as a link between low-grade chronic inflammation and diabetes.RESEARCH DESIGN AND METHODSUsing a case-cohort design, we followed 546 middle-aged individuals who developed diabetes and 538 who did not over ∼9 years within the Atherosclerosis Risk in Communities study.RESULTSIn weighted analyses, the correlation between DPP-IV levels and anthropometric, inflammatory, or metabolic variables was minimal (Spearman correlations <0.11). Those who developed diabetes had mean DPP-IV values similar to those who did not (P = 0.18). Individuals in the highest quartile of DPP-IV were not at greater risk of diabetes (hazard ratio 0.88 [95% CI 0.62–1.24]) in Cox proportional hazards models adjusting for age, sex, race, study center, and multiple additional diabetes risk factors.CONCLUSIONSFasting DPP-IV levels do not appear to predict incident diabetes.
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