Relationship between serum concentrations of interleukin-6 and tumor necrosis factor alpha in female Turkish subjects with normal and impaired glucose tolerance.
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.
Konukoglu
D
D
Istanbul University, Cerrahpasa Medical Faculty, Department of Biochemistry, Istanbul, Turkey. dkonuk@istanbul.edu.tr
Hatemi
H
H
Bayer
H
H
Bağriaçik
N
N
D000368:Aged; D001786:Blood Glucose / Q000032:analysis; D005215:Fasting / Q000097:blood; D005260:Female; D005951:Glucose Tolerance Test / Q000379:methods; D006801:Humans; D006943:Hyperglycemia / Q000097:blood*; D015850:Interleukin-6 / Q000097:blood*; D008875:Middle Aged; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis*; D014421:Turkey
D001786:Blood Glucose; C508600:IL6 protein, human; D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha