A hyperglycaemic state prompts the kidneys to release vascular endothelial growth factor (VEGF) and NO to expand afferent glomerular arterioles and release angiotensin II (AngII) and endothelin-1 (ET-1) to contract efferent arterioles, which leads to high blood pressure and the occurrence of DN [19]. This evidence concerns the gene VEGFA and hypertensive disorder.