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  • Title: Relationship between serum concentrations of interleukin-6 and tumor necrosis factor alpha in female Turkish subjects with normal and impaired glucose tolerance.
    Author: Konukoglu D, Hatemi H, Bayer H, Bağriaçik N.
    Journal: Horm Metab Res; 2006 Jan; 38(1):34-7. PubMed ID: 16477538.
    Abstract:
    Serum interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNFalpha) concentrations were measured in subjects during two-hour glucose loading in order to investigate the effects of glucose on serum IL-6 and TNFalpha concentrations. Twenty-six female subjects (mean age 60 +/- 10 years) had normal glucose tolerance (NGT) and nineteen female subjects (mean age: 63 +/- 9 years) had impaired glucose tolerance (IGT) according to WHO criteria. Serum IL-6 and TNFalpha concentrations were measured by chemiluminescent immunometric assay. Subjects with IGT have higher fasting serum TNFalpha levels than subjects with NGT (p < 0.01). Serum IL-6 and TNFalpha concentrations were elevated during glucose loading (for each comparison, p < 0.01). The increase in serum TNFalpha concentrations in IGT was greater than in NGT (p < 0.01). Serum IL-6 and TNFalpha concentration significantly correlated with insulin and glucose in IGT group (for each comparison, p < 0.01). The correlation between serum glucose and cytokines concentrations was significant in IGT (for each comparison, p < 0.01). There was also a positive correlation between serum IL-6 and TNFalpha in NGT and IGT (for each comparison, p < 0.01). In conclusion, hyperglycemia is associated with increased circulating cytokine concentrations and fasting TNFalpha concentrations seem to be more associated with IGT than IL-6.
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