PDGFB and diabetic retinopathy: Supporting the idea that pericyte loss may drive inflammation in diabetic retinopathy, decreased pericyte recruitment through endothelial PDGFB knockout led to abnormalities similar to those seen in diabetic retinopathy, and inhibition of retinal pericyte recruitment in a murine postnatal angiogenesis model resulted in endothelial inflammatory responses and breakdown of the blood-retina barrier (72, 73).