IntroductionDiabetes mellitus (DM), a major global health problem, is commonly associated with increased risk of developing micro-and macrovascular disease. Despite its clinical importance, the pathophysiology of diabetic complications is not completely understood. Platelets have been thought to be involved in these complications. Diabetic retinopathy (DR) is one of those important complications and leads to a considerable increase in morbidity.Platelet volume is a marker of platelet activation and function that can be measured easily as mean platelet volume (MPV) by clinical analyzers. It is now known that larger platelets are more reactive and produce more prothrombotic factors (1,2). Increased MPV has been demonstrated in diabetes (3-9). There are conflicting results about the relation of MPV with diabetic nephropathy/microalbuminuria (MA) (10-17), diabetic neuropathy (18-20), coronary artery disease (4,13,18,(21)(22)(23)(24)(25), and cerebrovascular disease (3-5,26) in diabetic patients. Large platelets may play a role in the development of vascular damage in DR by being more active, forcing the production of more prothrombotic factors, or causing endothelium-dependent vasomotor dysfunction.Keeping in mind these complex relations between MPV, diabetes, and its complications, in the present study we aimed to: 1) compare the MPV in diabetic patients with that in healthy controls; 2) determine if there is a difference in MPV between diabetic patients with and without DR, and also with and without proliferative retinopathy; 3) compare MPV levels of diabetic patients with or without hypertension (HTA), hyperlipemia (HL), and HTA with HL, and 4) see if there is a correlation of MPV with HbA1c and body mass index (BMI) in diabetic patients.
Material and methods
PatientsA total of 102 type 2 DM (T2DM) patients [65 female (63.7%), 35 male (36.3%)], 50 of them without retinopathy [31 female (62.0%), 19 male (38.0%)] and 52 with retinopathy [34 female (65.4%), 18 male (34.6%)], aged 22-90 years, were recruited from the Clinic of Ankara Education and Research Hospital from June 2009 to June Background/aim: Patients with diabetes mellitus have an increased risk of developing micro-and macrovascular complications. Retinopathy is one of the most important complications of diabetes whose pathophysiological cause has not yet been determined. One candidate may be platelet volume. In this study we aimed to investigate the association between mean platelet volume and diabetic retinopathy.Materials and methods: Mean platelet volume levels were investigated in type 2 diabetic patients with and without retinopathy, and in healthy participants. After reclassifying our diabetics in terms of the presence or absence of hypertension and hyperlipidemia, we compared their mean platelet volumes. We then checked to see if the mean platelet volume correlated with hemoglobin A1c and body mass index.
Results:The mean platelet volume levels were higher in all diabetic patients, and they were highest in diabetics with retinopathy. The mean plate...