On the 28th day of reperfusion, compared with low red fluorescence in the contralateral kidney, many PDGFRβ+ cells were observed around the tubules in the IRI kidney in the same mouse (Figure S1E), indicating that the PDGFRβ+ cell lineage proliferated and migrated to surround renal tubules during AKI‐CKD. This evidence concerns the gene PDGFRB and acute kidney injury.