Recently, several urinary new biomarkers of kidney injury, such as urinary liver-type fatty acid binding protein (L-FABP), [tissue inhibitor of metalloproteinases-2] × [insulin-like growth factor-binding protein 7] ([TIMP-2] × [IGFBP7]), or clusterin, have been noticed for early diagnosis of AKI. Here, IGFBP7 is linked to acute kidney injury.