While TIMP2 is a known biomarker for AKI, its direct pathogenic role in the AKI-CKD transition has not been fully elucidated.<h4>Methods</h4>TIMP2 expression was evaluated in multiple murine models, including unilateral ischemia-reperfusion injury (UIR), unilateral ureteral obstruction (UUO), and cisplatin-induced nephropathy. Here, TIMP2 is linked to ischemia reperfusion injury.