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We set out to identify novel hypoxia-inducible genes that promote vascular permeability and may therefore play a role in the pathogenesis of diabetic eye disease. We demonstrate that angiopoietin-like 4 (ANGPTL4) is up-regulated by the transcriptional enhancer, hypoxia-inducible factor-1 in hypoxic retinal M\u00fcller cells, and can promote vascular permeability. 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