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Elevated 1-h post-load plasma glucose levels in subjects with normal glucose tolerance are associated with unfavorable inflammatory profile

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Abstract

Glucose tolerant subjects with 1-h post-load glucose ≥155 mg/dl (NGT-1 h-high) are at increased risk for type 2 diabetes (T2DM). Prospective studies showed that chronic subclinical inflammation is a predictor of T2DM. In this study, we aimed to evaluate the inflammatory profile in NGT-1 h-high subjects as compared with individuals with 1-h post-load glucose <155 mg/dl (NGT-1 h-low). To this end, an oral glucose tolerance tests (OGTT) were performed in 1,099 nondiabetic whites. Cardio-metabolic risk factors including high-sensitivity C-reactive protein (hsCRP), erythrocyte sedimentation rate (ESR), fibrinogen, and complement C3 (C3) were determined. Of the 1,099 subjects examined, 497 had NGT-1 h-low, 154 had NGT-1 h-high, 158 had isolated impaired fasting glucose (IFG), and 290 had impaired glucose tolerance (IGT). As compared with NGT-1 h-low, NGT-1 h-high and IGT subjects exhibited significantly higher hsCRP, ESR, fibrinogen, and C3 levels. Notably, hsCRP, ESR, and C3 were also significantly higher as compared with IFG individuals. In a logistic regression analysis adjusted for age and gender, NGT-1 h-high and IGT subjects had a 1.8-fold increased risk of having the highest value of the Inflammatory Score. These data suggest that a value of a 1-h OGTT glucose ≥155 mg/dl may be helpful to identify a subset of normal glucose tolerance individuals at risk for chronic subclinical inflammation, a predictor of T2DM, and cardiovascular diseases.

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Acknowledgments

This work was supported, in part, by Italian Ministry of University Grant FIRB/MERIT RBNE08NKH7_002 to G.S.

Conflict of interest

None.

Human and Animal Rights

All procedures followed were approved by approved Institutional Ethics Committee of the University of Rome Tor Vergata and Catanzaro and in accordance with the ethical of the Helsinki declaration of 1975, as revised in 2008.

Informed Consent

Informed consent was obtained from all patients for being included in the study.

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Authors and Affiliations

  1. Department of Medical and Surgical Sciences, University Magna Graecia of Catanzaro, 88100, Viale Europa, Catanzaro, Italy

    Giorgio Sesti, Teresa Vanessa Fiorentino, Elena Succurro, Maria Perticone, Franco Arturi, Angela Sciacqua & Francesco Perticone

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  1. Giorgio Sesti
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  2. Teresa Vanessa Fiorentino
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  3. Elena Succurro
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  4. Maria Perticone
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  5. Franco Arturi
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  6. Angela Sciacqua
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  7. Francesco Perticone
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Correspondence to Giorgio Sesti.

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Sesti, G., Fiorentino, T.V., Succurro, E. et al. Elevated 1-h post-load plasma glucose levels in subjects with normal glucose tolerance are associated with unfavorable inflammatory profile. Acta Diabetol 51, 927–932 (2014). https://doi.org/10.1007/s00592-013-0539-x

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  • DOI: https://doi.org/10.1007/s00592-013-0539-x

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