Inflammatory cytokines and the risk of cardiovascular complications in type 2 diabetes

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This study evaluates peripheral blood T lymphocyte expression of inflammatory and proinflammatory cytokines as well as T regulatory (Treg) (FOXP3+CD25+CD4+) cells in type 2 diabetes (T2DM). Participants included 40 T2DM and 30 healthy control subjects. Twenty-four patients had no complications while 16 were afflicted with coronary heart disease (CHD). Relative to healthy subjects, all T2DM patients showed a significant increase in expression of CD4+IFN-Υ+, CD4+TNF-α+, and CD4+IL-8+ T cells (P < 0.001) as well as CD4+IL-6+, CD4+IL-1β+, and IL-17+ T cells (P < 0.05) while the ratios of Treg/Th1(CD4+IFN-Υ+) and Treg/Th-17(CD4+IL-17+) cells were significantly decreased (P < 0.05 and P < 0.01). T2DM patients with CHD showed a significant increase in CD4+IFN-Υ+, CD4+TNF-α+, and CD4+IL-17+ T cells and a significant decrease in Treg/Th1 and Treg/IL-17 cells compared to T2DM patients without CHD (P < 0.05). In CHD-afflicted T2DM, HbA1c correlated positively with CD4+IFN-Υ+ T cells (P < 0.01), HDL correlated negatively with each of CD4+IL-8+ T cells and CD4+IL-17+ T cells (P < 0.05), and LDL correlated positively with CD4+IL-1β+ T cells (P < 0.05). Conclusion. This study shows that hyperglycemia and dyslipidemia correlate with increased inflammatory cytokine expression and suggests the involvement of T cells in the development of diabetes and its complications. © 2013 Fadia Mahmoud and Ebaa Al-Ozairi.




Mahmoud, F., & Al-Ozairi, E. (2013). Inflammatory cytokines and the risk of cardiovascular complications in type 2 diabetes. Disease Markers, 35(4), 235–241.

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