Immune checkpoint inhibitors in patients with chronic kidney disease: Assessing their ability to cause acute kidney injury and informing their proper use.

Immune check point inhibitors (ICI) have secured regulatory approvals across the world for the treatment of various types of cancers. Though not as frequent as immune-related adverse events (AEs) involving other organs, a considerable number of ICI-related renal AE have also been reported and predicting such events has become important. We provide an updated review on possible mechanisms of ICI-related acute kidney injury (AKI), related risk factors, and the use of ICIs in patients with chronic kidney diseases (CKD). A systematic search for related articles was conducted. Acute tubulointerstitial nephritis (ATIN) is known to be the main cause of ICI-related AKI, with glomerulonephritis also a significant cause. Factors including use of concurrent medications, extra-renal immune related AEs, and combination of two or more immunotherapy drugs are possible risk factors. Use of ICI in patients with CKD may be related to increased occurrence of overall immune related AEs. If the diagnosis of ICI related renal AEs is confirmed, prompt use of steroids is recommended, and in severe cases of AKI, discontinuation of ICI should be considered.