FBL and acute kidney injury: Since pericytes are depleted as they give rise to cortical and OSOM myofibroblasts’ expansion after IRI-AKI and I-UUO (61–63), these findings suggest that Fib-2 and Fib-6, and to a lesser extent Fib-1, contribute to the IM and ISOM myofibroblast expansion after R-UUO, while vascular pericytes play only a minor role.