Background: Diabetic macular edema (DME) is characterized by hyperpermeability of retinal blood vessels and subsequent formation of hard exudates and macular edema. ANGPTL2 is associated with microvascularization and angiopoiesis, so we investigate the relationship between ANGPTL2 and occurrence of DME.
Methods: 222 patients with type 2 diabetic patients were enrolled and divided into 3 groups with matched gender, age and BMI: 1) DM group: patients without diabetic retinopathy (DR) and DME, 2) DR without DME group, and 3) DR with DME group. All subjects were performed optical coherence tomography scanning (OCT) and fundus photography. ANGPTL2 was measured by Elisa. We analyzed the OCT values of concentric circles of macular central fovea with average diameters of 1 mm (R1), 3 mm (R3) and 6 mm (R6) to diagnose DME. Multivariable regression analysis was performed to estimate association between ANGPTL2 and DME.
Results: Values of duration of diabetes, fasting C-peptide, postprandial C-peptide 1h, CRP, history of cataract and Statins treatment showed significant differences among three groups (p<0.05). ANGPTL2 levels in DM, DR without DME, DR with DME groups were 3.55±1.56, 3.68±1.59, 4.45±1.8ng/ml, respectively (P=0.012). In multivariable linear regression, Angplt2 was significantly different among three groups after adjustment for age, gender, BMI, glycosylated hemoglobin, ALT, AST, GGT, and fasting C peptide (P=0.023).
Conclusions: Our findings suggest that ANGPTL2 is higher in patients both with DR and DME. Increased level of ANGPTL2 may take part in the progression of diabetic macular edema in type 2 diabetes mellitus.
N. Zhang: None. Y. An: None. R. Yin: None. D. Zhao: None.