Renal peritubular interstitial fibroblast-like cells are critical for adult erythropoiesis, as they are the main source of erythropoietin (EPO). Hypoxia-inducible factor 2 (HIF-2) controls EPO synthesis in the kidney and liver and is regulated by prolyl-4-hydroxylase domain (PHD) dioxygenases PHD1, PHD2, and PHD3, which function as cellular oxygen sensors. Renal interstitial cells with EPO-producing capacity are poorly characterized, and the role of the PHD/HIF-2 axis in renal EPO-producing cell (REPC) plasticity is unclear. Here we targeted the PHD/HIF-2/EPO axis in FOXD1 stroma-derived renal interstitial cells and examined the role of individual PHDs in REPC pool size regulation and renal EPO output. Renal interstitial cells with EPO-producing capacity were entirely derived from FOXD1-expressing stroma, and
Hanako Kobayashi, Qingdu Liu, Thomas C. Binns, Andres A. Urrutia, Olena Davidoff, Pinelopi P. Kapitsinou, Andrew S. Pfaff, Hannes Olauson, Annika Wernerson, Agnes B. Fogo, Guo-Hua Fong, Kenneth W. Gross, Volker H. Haase
Differential expression of PDGFRB in murine and human EPO-producing renal interstitial cells.