SERPINF1 and diabetic retinopathy: Inhibitors of the Wnt pathway such as SERPINA3K, very LDL receptor extracellular domain (VLN), endostatin, kallistatin, pigment epithelium-derived factor (PEDF), and miR-184 are decreased in the eyes of diabetic retinopathy patients [29,30,31,32,33,34] (Table 1).