HAVCR1 and acute kidney injury: Kidney injury molecule 1 (KIM‐1) is a transmembrane glycoprotein that is highly expressed in kidney proximal tubular cells with kidney injury.15 The KIM‐1 ectodomain is cleaved, released into urine, and can be quantified as a sensitive and specific biomarker for AKI in rodents16 and humans.17 KIM‐1 reports AKI secondary to a wide range of toxic, ischemic, and septic insults.