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Elevated HbA1c levels and the accumulation of differentiated T cells in CMV+ individuals

Aims/hypothesisBiological ageing of the immune system, or immunosenescence, predicts poor health and increased mortality. A hallmark of immunosenescence is the accumulation of differentiated cytotoxic T cells (CD27−CD45RA+/−; or dCTLs), partially driven by infection with the cytomegalovirus (CMV). I...

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Hauptverfasser: Rector, Jerrald L. (VerfasserIn) , Herr, Raphael (VerfasserIn) , Hoffmann, Kristina (VerfasserIn) , Fischer, Joachim E. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: November 2015
In: Diabetologia
Year: 2015, Jahrgang: 58, Heft: 11, Pages: 2596-2605
ISSN:1432-0428
DOI:10.1007/s00125-015-3731-4
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1007/s00125-015-3731-4
Verlag, Volltext: https://doi.org/10.1007/s00125-015-3731-4
Volltext
Verfasserangaben:Jerrald L. Rector, G. Neil Thomas, Victoria E. Burns, Jennifer B. Dowd, Raphael M. Herr, Paul A. Moss, Marc N. Jarczok, Kristina Hoffman, Joachim E. Fischer, Jos A. Bosch

MARC

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520 |a Aims/hypothesisBiological ageing of the immune system, or immunosenescence, predicts poor health and increased mortality. A hallmark of immunosenescence is the accumulation of differentiated cytotoxic T cells (CD27−CD45RA+/−; or dCTLs), partially driven by infection with the cytomegalovirus (CMV). Immune impairments reminiscent of immunosenescence are also observed in hyperglycaemia, and in vitro studies have illustrated mechanisms by which elevated glucose can lead to increased dCTLs. This study explored associations between glucose dysregulation and markers of immunosenescence in CMV+ and CMV− individuals.MethodsA cross-sectional sample of participants from an occupational cohort study (n = 1,103, mean age 40 years, 88% male) were assessed for HbA1c and fasting glucose levels, diabetes, cardiovascular risk factors (e.g. lipids), numbers of circulating effector memory (EM; CD27−CD45RA−) and CD45RA re-expressing effector memory (EMRA; CD27−CD45RA+) T cells, and CMV infection status. Self-report and physical examination assessed anthropometric, sociodemographic and lifestyle factors.ResultsAmong CMV+ individuals (n = 400), elevated HbA1c was associated with increased numbers of EM (B = 2.75, p < 0.01) and EMRA (B = 2.90, p < 0.01) T cells, which was robust to adjustment for age, sex, sociodemographic variables and lifestyle factors. Elevated EM T cells were also positively associated with total cholesterol (B = 0.04, p < 0.05) after applying similar adjustments. No associations were observed in CMV− individuals.Conclusions/interpretationThe present study identified consistent associations of unfavourable glucose and lipid profiles with accumulation of dCTLs in CMV+ individuals. These results provide evidence that the impact of metabolic risk factors on immunity and health can be co-determined by infectious factors, and provide a novel pathway linking metabolic risk factors with accelerated immunosenescence. 
650 4 |a Cholesterol 
650 4 |a CMV 
650 4 |a Cytomegalovirus 
650 4 |a Diabetes 
650 4 |a Glucose 
650 4 |a Haemoglobin A1c 
650 4 |a HbA1c 
650 4 |a Immune ageing 
650 4 |a Metabolic syndrome 
650 4 |a T cell 
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