Malondialdehyde and Zinc May Relate to Severity of Microvascular Complications in Diabetes: A Preliminary Study on Older Adults with Type 2 Diabetes Mellitus in Northeast China

Abstract

Min Sun,1 Guanchi Yan,2 Siming Sun,3 Xiaonan Li,1 Wei Sun,4 Yuehui Wang1 1Department of Geriatrics, The First Hospital of Jilin University, Changchun, People’s Republic of China; 2Department of Endocrinology and Metabolism, The Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, People’s Republic of China; 3Department of Clinical Research, The First Hospital of Jilin University, Changchun, People’s Republic of China; 4Education Department, The First Hospital of Jilin University, Changchun, People’s Republic of ChinaCorrespondence: Yuehui Wang, Department of Geriatrics, The First Hospital of Jilin University, No. 1 Xinmin Street, Chaoyang District, Changchun, Jilin, 130061, People’s Republic of China, Tel [phone], Email [email protected] Wei Sun, Education Department, The First Hospital of Jilin University, No. 1 Xinmin Street, Chaoyang District, Changchun, Jilin, 130061, People’s Republic of China, Tel [phone], Email [email protected]: Serum trace elements and oxidative stress factors are related to diabetic microvascular complications. The study was to investigate the complex relationship between trace elements, oxidative stress factors, and the severity of microvascular complications of diabetes in older adults.Methods: The present study included patients with or without type 2 diabetes, and blood glucose, blood lipids, trace elements (iron, magnesium, zinc), oxidative stress factors (malondialdehyde (MDA), nitric oxide (NO), superoxide dismutase (SOD), and total antioxidant capacity (T-AOC)) were evaluated. Risk factors for the severity of diabetic microvascular complications in older adults with diabetes were also estimated.Results: There were statistically significant differences in fasting blood glucose (FBG), triglycerides (TG), low density lipoprotein (LDL), glycated hemoglobin (HbAlc), MDA, NO, SOD, T-AOC, magnesium, and zinc between the two groups (P< 0.05). Iron (rZinc = 0.147, rSOD = 0.180, rT-AOC = 0.193, P < 0.05) was positively correlated with zinc, SOD and T-AOC. Iron was negatively correlated with MDA (rMDA = − 0.146, P < 0.05). Magnesium was positively correlated with SOD (rMagnesium = 0.147, P < 0.05). Zinc (rSOD = 0.616, rT-AOC = 0.575, P < 0.01) was positively correlated with SOD and T-AOC. Zinc (rMDA =− 0.636, rNO=− 0.616, P< 0.01) was positively correlated with MDA and negatively correlated with NO. The course of disease (18.653, [5.726; 60.764], P < 0.01), FBG (1.265, [1.059; 1.511], P < 0.05), HbAlc (1.545, [1.431; 1.680], P < 0.01), MDA (2.989, [1.900; 4.702], P < 0.01) were risk factor for the severity of diabetic microvascular complications. Zinc (0.680, [0.503; 0.919], P < 0.05) and SOD (0.820, [0.698; 0.964], P < 0.05) were protective factors for the severity of diabetic microvascular complications.Conclusion: Serum trace elements are related to oxidative stress levels in older adults with type 2 diabetes. The more stable trace element in older adults with diabetes, the lower the oxidative stress and the fewer microvascular complications of diabetes.Keywords: type 2 diabetes mellitus, older adults, trace elements, diabetic microvascular complications, oxidative stress

Keywords

• type 2 diabetes mellitus
• older adults
• trace elements
• diabetic microvascular complications
• oxidative stress