Research Article

Ocular TGF-β, Matrix Metalloproteinases, and TIMP-1 Increase with the Development and Progression of Diabetic Retinopathy in Type 2 Diabetes Mellitus

Table 2

Concentrations (; pg/ml) of TGF-β1, TGF-β2, and TGF-β3 in serum and AH of healthy individuals (controls) and diabetic patients with different stages of DR. The fold change for each group was calculated relative to the control group.

Healthy controlsNon-apparent DRMild/moderate NPDRAdvanced NPDR/PDR
(pg/ml) (pg/ml)Relative change (pg/ml)Relative change (pg/ml)Relative change

TGF-β1
Serum1.51.00.8
AH1.42.65.5
TGF-β2
Serum1.01.00.9
AH0.81.31.7
TGF-β3
Serum1.21.00.8
AH1.41.83.8

Factor of change compared to healthy controls.