Crosstalk between oxygen signaling and iron metabolism in renal interstitial fibroblasts

Norio Suzuki, Yuma Iwamura, Koichiro Kato, Hirotaka Ishioka, Yusuke Konta, Koji Sato, Nao Uchida, Noa Koida, Hiroki Sekine, Tetsuhiro Tanaka, Naonori Kumagai, Taku Nakai

Research output: Contribution to journalReview articlepeer-review

2 Citations (Scopus)

Abstract

To maintain the oxygen supply, the production of red blood cells (erythrocytes) is promoted under low-oxygen conditions (hypoxia). Oxygen is carried by hemoglobin in erythrocytes, in which the majority of the essential element iron in the body is contained. Because iron metabolism is strictly controlled in a semi-closed recycling system to protect cells from oxidative stress caused by iron, hypoxia-inducible erythropoiesis is closely coordinated by regulatory systems that mobilize stored iron for hemoglobin synthesis. The erythroid growth factor erythropoietin (EPO) is mainly secreted by interstitial fibroblasts in the renal cortex, which are known as renal EPO-producing (REP) cells, and promotes erythropoiesis and iron mobilization. Intriguingly, EPO production is strongly induced by hypoxia through iron-dependent pathways in REP cells. Here, we summarize recent studies on the network mechanisms linking hypoxia-inducible EPO production, erythropoiesis and iron metabolism. Additionally, we introduce disease mechanisms related to disorders in the network mediated by REP cell functions. Furthermore, we propose future studies regarding the application of renal cells derived from the urine of kidney disease patients to investigate the molecular pathology of chronic kidney disease and develop precise and personalized medicine for kidney disease.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalJournal of Clinical Biochemistry and Nutrition
Volume74
Issue number3
DOIs
Publication statusPublished - 2024

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Nutrition and Dietetics
  • Clinical Biochemistry

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