Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitors: A Potential New Treatment for Anemia in Patients With CKD  Nupur Gupta, MD, Jay B. Wish, MD  American.

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Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitors: A Potential New Treatment for Anemia in Patients With CKD  Nupur Gupta, MD, Jay B. Wish, MD  American Journal of Kidney Diseases  Volume 69, Issue 6, Pages 815-826 (June 2017) DOI: 10.1053/j.ajkd.2016.12.011 Copyright © 2017 The Authors Terms and Conditions

Figure 1 Hypoxia-inducible factor (HIF) pathway. Abbreviations: DcytB, duodenal cytochrome B; DMT1, divalent metal transporter 1; EPO, erythropoietin; PH, prolyl hydroxylase. American Journal of Kidney Diseases 2017 69, 815-826DOI: (10.1053/j.ajkd.2016.12.011) Copyright © 2017 The Authors Terms and Conditions

Figure 2 Erythropoietic effects of hypoxia-inducible factor (HIF). (1) HIF upregulates divalent metal transporter 1 (DMT1) and duodenal cytochrome B (DcytB) to increase intestinal iron (Fe) absorption; (2) transferrin transports Fe to transferrin receptors in the bone marrow; (3) Fe is released from transferrin into the developing erythrocyte; (4) HIF upregulates the erythropoietin (EPO) receptor (EPO-R) and endogenous EPO production; (5) HIF upregulates transferrin receptor, increasing iron uptake by proerythrocytes; (6) HIF promotes the formation of fully functional mature erythrocytes replete with hemoglobin (Hb); (7) after a lifespan averaging approximately 120 days, exhausted erythrocytes are scavenged in the liver and the Fe is returned for reuse. Abbreviation: GI, gastrointestinal. American Journal of Kidney Diseases 2017 69, 815-826DOI: (10.1053/j.ajkd.2016.12.011) Copyright © 2017 The Authors Terms and Conditions