Increased 8-hydroxy-2'-deoxyguanosine in leukocyte DNA from patients with type 2 diabetes and microangiopathy. (June 2016)

• Record Type: Journal Article
• Authors: Ye, Xiaozhen; Jiang, Rong; Zhang, Qianqian; Wang, Ruifeng; Yang, Cuihua; Ma, Jian; Du, Hong
• Is Part Of: Journal of international medical research. Volume 44:Number 3(2016:Jun.)
• Page Start: 472
• Page End: 482
• Publication Date: 2016-06
• Subjects: Type 2 diabetes -- DNA damage -- oxidative stress -- diabetic microangiopathy -- 8-hydroxy-2'-deoxyguanosine; Medicine -- Periodicals; Pharmacology -- Periodicals; 610.5
• DOI: 10.1177/0300060515621530
• Languages: English
• ISSNs: 0300-0605

Abstract

Objective: To evaluate oxidative damage in leukocytes from patients with type 2 diabetes by examining 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels. Methods: Patients with type 2 diabetes and healthy controls were assessed for demographic, clinical and biochemical characteristics. Levels of 8-OHdG in extracted leukocyte DNA were determined by enzyme linked immunosorbent assay. Results: Of 108 patients with type 2 diabetes (56 with microangiopathy, 52 without) and 65 healthy controls, leukocyte 8-OHdG levels were higher in patients with type 2 diabetes versus controls (median ± interquartile range [IQR], 3.19 ± 2.17 versus 0.38 ± 1.00 ng/ml), and higher in patients with type 2 diabetes and microangiopathy versus those without microangiopathy (median ± IQR, 3.34 ± 1.87 versus 2.71 ± 2.26 ng/ml). Patients with type 2 diabetes and microangiopathy had higher serum creatinine and urinary albumin levels versus those without microangiopathy. Leukocyte 8-OHdG levels, duration of type 2 diabetes, albuminuria, use of insulin and use of angiotensin-converting enzyme (ACE) inhibitors/angiotensin receptor blockers (ARBs) were independently associated with microangiopathy in patients with type 2 diabetes after adjustment for smoking. Conclusions: Leukocyte oxidative DNA damage was high in patients with type 2 diabetes and microangiopathy. Presence of microangiopathy was associated with leukocyte 8-OHdG levels, duration of type 2 diabetes, albuminuria and use of ACE inhibitors/ARBs or insulin.