VEGFA and diabetes mellitus: 1502 Zhang SX, Wang JJ, Gao GQ, Parke K, Ma JXPigment epithelium-derived factor downregulates vascular endothelial growth factor (VEGF) expression and inhibits VEGF-VEGF receptor 2 binding in diabetic retinopathyJOURNAL OF MOLECULAR ENDOCRINOLOGY. 2006 AUG; 37 (1): 1-12