Erythropoietin mediates tissue protection through an erythropoietin and common β-subunit heteroreceptor
Top Cited Papers
- 29 September 2004
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 101 (41), 14907-14912
- https://doi.org/10.1073/pnas.0406491101
Abstract
The cytokine erythropoietin (Epo) is tissue-protective in preclinical models of ischemic, traumatic, toxic, and inflammatory injuries. We have recently characterized Epo derivatives that do not bind to the Epo receptor (EpoR) yet are tissue-protective. For example, carbamylated Epo (CEpo) does not stimulate erythropoiesis, yet it prevents tissue injury in a wide variety of in vivo and in vitro models. These observations suggest that another receptor is responsible for the tissue-protective actions of Epo. Notably, prior investigation suggests that EpoR physically interacts with the common β receptor (βcR), the signal-transducing subunit shared by the granulocyte-macrophage colony stimulating factor, and the IL-3 and IL-5 receptors. However, because βcR knockout mice exhibit normal erythrocyte maturation, βcR is not required for erythropoiesis. We hypothesized that βcR in combination with the EpoR expressed by nonhematopoietic cells constitutes a tissue-protective receptor. In support of this hypothesis, membrane proteins prepared from rat brain, heart, liver, or kidney were greatly enriched in EpoR after passage over either Epo or CEpo columns but covalently bound in a complex with βcR. Further, antibodies against EpoR coimmunoprecipitated βcR from membranes prepared from neuronal-like P-19 cells that respond to Epo-induced tissue protection. Immunocytochemical studies of spinal cord neurons and cardiomyocytes protected by Epo demonstrated cellular colocalization of Epo βcR and EpoR. Finally, as predicted by the hypothesis, neither Epo nor CEpo was active in cardiomyocyte or spinal cord injury models performed in the βcR knockout mouse. These data support the concept that EpoR and βcR comprise a tissue-protective heteroreceptor.Keywords
This publication has 37 references indexed in Scilit:
- Erythropoietin as an antiapoptotic, tissue-protective cytokineCell Death & Differentiation, 2004
- Derivatives of Erythropoietin That Are Tissue Protective But Not ErythropoieticScience, 2004
- Erythropoietin as a Tissue-Protective Cytokine in Brain Injury: What Do We Know and Where Do We Go?The Neuroscientist, 2004
- Molecular assembly of the ternary granulocyte-macrophage colony-stimulating factor receptor complexBlood, 2003
- A model for assembly and activation of the GM-CSF, IL-3 and IL-5 receptorsExperimental Hematology, 2000
- GM-CSF RESCUES TF-1 CELLS FROM GROWTH FACTOR WITHDRAWAL-INDUCED, BUT NOT DIFFERENTIATION-INDUCED APOPTOSIS: THE ROLE OF BCL-2 AND MCL-1Cytokine, 1999
- A Potential Role for Erythropoietin in Focal Permanent Cerebral Ischemia in MiceJournal of Cerebral Blood Flow & Metabolism, 1999
- A Sensitive and Reliable Locomotor Rating Scale for Open Field Testing in RatsJournal of Neurotrauma, 1995
- Production of interleukin-3 by murine central nervous system neuronsNeuroscience Letters, 1994
- Interleukin 3 as a trophic factor for central cholinergic neurons in vitro and in vivoNeuron, 1990