Background: Increased telomere shortening has been demonstrated in several diseases including type 2 diabetes. However, it is not known whether telomere length changes during the course of type 2 diabetes.
Objective: To determine telomere length at different stages of type 2 diabetes, including early and late stages.
Methods: A total of 93 males with type 2 diabetes and 10 years or more since original diagnosis; 96 males with less than one year of diagnosis; 98 age matched healthy males. Telomere length was estimated by means of real-time polymerase chain reaction. Fasting venous blood samples were obtained for measurement of lipid peroxidation and inflammation markers.
Results: We found a greater telomere shortening in group (A) with type 2 diabetes of 10 years or more since original diagnosis, compared with the control group (C) of healthy males (5.4 vs 9.6 Kb) (p = 0.04) and with group B (5.4 vs 8.7 kb) (p = 0.05). With regard to inflammatory markers TNF-α, malondialdehyde peroxidation and adiponectin we found significant differences.
Conclusion: Telomere shortening increases with the duration of diabetes. The time of exhibition suggests in parallel that the progressive increase of inflammation and/or oxidative stress plays a direct role in telomere shortening.
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