FABP4 and acute kidney injury: It has been demonstrated that ER stress contributes to I/R-induced AKI initiation and progression.11 And FABP4 has been documented to be involved in ER stress in atherosclerosis and diabetic nephropathy.15,18 To evaluate if FABP4 participates in AKI-associated ER stress, we further measured expression of ER stress-related proteins in kidneys.