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Marrow JP, Alshamali R, Edgett BA, Allwood MA, Cochrane KLS, Al-Sabbag S, Ayoub A, Ask K, Hare GMT, Brunt KR, Simpson JA. Cardiomyocyte crosstalk with endothelium modulates cardiac structure, function, and ischemia-reperfusion injury susceptibility through erythropoietin. Front Physiol 2024; 15:1397049. [PMID: 39011088 PMCID: PMC11246973 DOI: 10.3389/fphys.2024.1397049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/03/2024] [Indexed: 07/17/2024] Open
Abstract
Erythropoietin (EPO) exerts non-canonical roles beyond erythropoiesis that are developmentally, structurally, and physiologically relevant for the heart as a paracrine factor. The role for paracrine EPO signalling and cellular crosstalk in the adult is uncertain. Here, we provided novel evidence showing cardiomyocyte restricted loss of function in Epo in adult mice induced hyper-compensatory increases in Epo expression by adjacent cardiac endothelial cells via HIF-2α independent mechanisms. These hearts showed concentric cellular hypertrophy, elevated contractility and relaxation, and greater resistance to ischemia-reperfusion injury. Voluntary exercise capacity compared to control hearts was improved independent of any changes to whole-body metabolism or blood O2 content or delivery (i.e., hematocrit). Our findings suggest cardiac EPO had a localized effect within the normoxic heart, which was regulated by cell-specific EPO-reciprocity between cardiomyocytes and endothelium. Within the heart, hyper-compensated endothelial Epo expression was accompanied by elevated Vegfr1 and Vegfb RNA, that upon pharmacological pan-inhibition of VEGF-VEGFR signaling, resulted in a paradoxical upregulation in whole-heart Epo. Thus, we provide the first evidence that a novel EPO-EPOR/VEGF-VEGFR axis exists to carefully mediate cardiac homeostasis via cardiomyocyte-endothelial EPO crosstalk.
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Affiliation(s)
- Jade P Marrow
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Guelph, ON, Canada
| | - Razan Alshamali
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Guelph, ON, Canada
| | - Brittany A Edgett
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Guelph, ON, Canada
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Melissa A Allwood
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Guelph, ON, Canada
| | - Kyla L S Cochrane
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Guelph, ON, Canada
| | - Sara Al-Sabbag
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Anmar Ayoub
- Firestone Institute for Respiratory Health, McMaster University, Hamilton, ON, Canada
| | - Kjetil Ask
- Firestone Institute for Respiratory Health, McMaster University, Hamilton, ON, Canada
| | - Gregory M T Hare
- IMPART Investigator Team Canada, Guelph, ON, Canada
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, ON, Canada
- Department of Physiology, University of Toronto, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Keith R Brunt
- IMPART Investigator Team Canada, Guelph, ON, Canada
- Department of Pharmacology, Dalhousie Medicine New Brunswick, Saint John, NB, Canada
| | - Jeremy A Simpson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
- IMPART Investigator Team Canada, Guelph, ON, Canada
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2
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Northrup V, Perez LJ, Edgett BA, Karakach T, Simpson JA, Brunt KR. Intron retention is a mechanism of erythropoietin regulation in brain cell models. Gene 2024; 898:148099. [PMID: 38128788 DOI: 10.1016/j.gene.2023.148099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/01/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
Intron retention is a mechanism of post-transcriptional gene regulation, including genes involved in erythropoiesis. Erythropoietin (EPO) is a hormone without evidence of intracellular vesicle storage that regulates erythropoiesis. We hypothesize that EPO uses intron retention as a mechanism of post-transcriptional regulation in response to hypoxia and ischemia. Cell models of hypoxia and ischemia for kidney, liver, and brain cells were examined for intron retention by real time quantitative PCR. EPO expression increased in most cells except for blood brain barrier and liver cells. The intron retained transcript ratio decreased in brain cells, except for Astrocytes, but showed no change in kidney or liver after 24 h of ischemia. The shift in intron ratio was maintained when using poly (A) enriched cDNA, suggesting that intron retention is not due to immature transcripts. The expression of EPO was elevated at variable time points amongst cell models with the intron ratio also changing over a time course of 2 to 16 h after ischemia. We conclude that intron retention is a mechanism regulating EPO expression in response to ischemia in a tissue specific manner.
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Affiliation(s)
- Victoria Northrup
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada; Dalhousie Medicine New Brunswick, Saint John, New Brunswick, Canada; IMPART investigator team Canada
| | - Lester J Perez
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada; Dalhousie Medicine New Brunswick, Saint John, New Brunswick, Canada; IMPART investigator team Canada
| | - Brittany A Edgett
- Department of Kinesiology, University of Calgary, Calgary, Alberta, Canada; IMPART investigator team Canada
| | - Tobias Karakach
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada; IMPART investigator team Canada
| | - Jeremy A Simpson
- Department of Human and Nutritional Science, University of Guelph, Guelph, Ontario, Canada; IMPART investigator team Canada
| | - Keith R Brunt
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada; Dalhousie Medicine New Brunswick, Saint John, New Brunswick, Canada; IMPART investigator team Canada.
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3
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Yi JY, Kim M, Ahn JH, Kim BG, Son J, Sung C. CRISPR/deadCas9-based high-throughput gene doping analysis (HiGDA): A proof of concept for exogenous human erythropoietin gene doping detection. Talanta 2023; 258:124455. [PMID: 36933297 DOI: 10.1016/j.talanta.2023.124455] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/07/2023] [Accepted: 03/11/2023] [Indexed: 03/17/2023]
Abstract
A genetic approach targeted toward improving athletic performance is called gene doping and is prohibited by the World Anti-Doping Agency. Currently, the clustered regularly interspaced short palindromic repeats-associated protein (Cas)-related assays have been utilized to detect genetic deficiencies or mutations. Among the Cas proteins, deadCas9 (dCas9), a nuclease-deficient mutant of Cas9, acts as a DNA binding protein with a target-specific single guide RNA. On the basis of the principles, we developed a dCas9-based high-throughput gene doping analysis for exogenous gene detection. The assay comprises two distinctive dCas9s, a magnetic bead immobilized capture dCas9 for exogenous gene isolation and a biotinylated dCas9 with streptavidin-polyHRP that enables rapid signal amplification. For efficient biotin labeling via maleimide-thiol chemistry, two cysteine residues of dCas9 were structurally validated, and the Cys574 residue was identified as an essential labeling site. As a result, we succeeded in detecting the target gene in a concentration as low as 12.3 fM (7.41 × 105 copies) and up to 10 nM (6.07 × 1011 copies) in a whole blood sample within 1 h with HiGDA. Assuming an exogenous gene transfer scenario, we added a direct blood amplification step to establish a rapid analytical procedure while detecting target genes with high sensitivity. Finally, we detected the exogenous human erythropoietin gene at concentrations as low as 2.5 copies within 90 min in 5 μL of the blood sample. Herein, we propose that HiGDA is a very fast, highly sensitive, and practical detection method for actual doping field in the future.
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Affiliation(s)
- Joon-Yeop Yi
- Doping Control Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea; Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, 08826, South Korea; Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Minyoung Kim
- Doping Control Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Jung Ho Ahn
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Byung-Gee Kim
- Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, 08826, South Korea; Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea; Bio-Max/N-Bio Institute, Seoul National University, Seoul, 08826, South Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, South Korea; Institute for Sustainable Development (ISD), Seoul National University, Seoul, 08826, South Korea
| | - Junghyun Son
- Doping Control Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Changmin Sung
- Doping Control Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea.
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Knorr DY, Rodriguez Polo I, Pies HS, Schwedhelm-Domeyer N, Pauls S, Behr R, Heinrich R. The cytokine receptor CRLF3 is a human neuroprotective EV-3 (Epo) receptor. Front Mol Neurosci 2023; 16:1154509. [PMID: 37168680 PMCID: PMC10165946 DOI: 10.3389/fnmol.2023.1154509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/15/2023] [Indexed: 05/13/2023] Open
Abstract
The evolutionary conserved orphan cytokine receptor-like factor 3 (CRLF3) has been implicated in human disease, vertebrate hematopoiesis and insect neuroprotection. While its specific functions are elusive, experimental evidence points toward a general role in cell homeostasis. Erythropoietin (Epo) is a major regulator of vertebrate hematopoiesis and a general cytoprotective cytokine. Erythropoietic functions mediated by classical Epo receptor are understood in great detail whereas Epo-mediated cytoprotective mechanisms are more complex due to involvement of additional Epo receptors and a non-erythropoietic splice variant with selectivity for certain receptors. In the present study, we show that the human CRLF3 mediates neuroprotection upon activation with the natural Epo splice variant EV-3. We generated CRLF3 knock-out iPSC lines and differentiated them toward the neuronal lineage. While apoptotic death of rotenone-challenged wild type iPSC-derived neurons was prevented by EV-3, EV-3-mediated neuroprotection was absent in CRLF3 knock-out neurons. Rotenone-induced apoptosis and EV-3-mediated neuroprotection were associated with differential expression of pro-and anti-apoptotic genes. Our data characterize human CRLF3 as a receptor involved in Epo-mediated neuroprotection and identify CRLF3 as the first known receptor for EV-3.
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Affiliation(s)
- Debbra Y. Knorr
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
- *Correspondence: Debbra Y. Knorr,
| | - Ignacio Rodriguez Polo
- Department of Developmental Biology, Göttingen Center for Molecular Biosciences, Georg-August University Göttingen, Göttingen, Germany
- Research Platform Degenerative Diseases, German Primate Center, Leibniz Institute for Primate Research, Göttingen, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen, Germany
- Developmental Models Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Hanna S. Pies
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
| | - Nicola Schwedhelm-Domeyer
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
| | - Stephanie Pauls
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
| | - Rüdiger Behr
- Research Platform Degenerative Diseases, German Primate Center, Leibniz Institute for Primate Research, Göttingen, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen, Germany
| | - Ralf Heinrich
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany
- Ralf Heinrich,
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Protection of insect neurons by erythropoietin/CRLF3-mediated regulation of pro-apoptotic acetylcholinesterase. Sci Rep 2022; 12:18565. [PMID: 36329181 PMCID: PMC9633726 DOI: 10.1038/s41598-022-22035-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
Cytokine receptor-like factor 3 (CRLF3) is a conserved but largely uncharacterized orphan cytokine receptor of eumetazoan animals. CRLF3-mediated neuroprotection in insects can be stimulated with human erythropoietin. To identify mechanisms of CRLF3-mediated neuroprotection we studied the expression and proapoptotic function of acetylcholinesterase in insect neurons. We exposed primary brain neurons from Tribolium castaneum to apoptogenic stimuli and dsRNA to interfere with acetylcholinesterase gene expression and compared survival and acetylcholinesterase expression in the presence or absence of the CRLF3 ligand erythropoietin. Hypoxia increased apoptotic cell death and expression of both acetylcholinesterase-coding genes ace-1 and ace-2. Both ace genes give rise to single transcripts in normal and apoptogenic conditions. Pharmacological inhibition of acetylcholinesterases and RNAi-mediated knockdown of either ace-1 or ace-2 expression prevented hypoxia-induced apoptosis. Activation of CRLF3 with protective concentrations of erythropoietin prevented the increased expression of acetylcholinesterase with larger impact on ace-1 than on ace-2. In contrast, high concentrations of erythropoietin that cause neuronal death induced ace-1 expression and hence promoted apoptosis. Our study confirms the general proapoptotic function of AChE, assigns a role of both ace-1 and ace-2 in the regulation of apoptotic death and identifies the erythropoietin/CRLF3-mediated prevention of enhanced acetylcholinesterase expression under apoptogenic conditions as neuroprotective mechanism.
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A Review of Pleiotropic Potential of Erythropoietin as an Adjunctive Therapy for COVID-19. JOURNAL OF CLINICAL AND BASIC RESEARCH 2022. [DOI: 10.52547/jcbr.6.1.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Introducing the brain erythropoietin circle to explain adaptive brain hardware upgrade and improved performance. Mol Psychiatry 2022; 27:2372-2379. [PMID: 35414656 PMCID: PMC9004453 DOI: 10.1038/s41380-022-01551-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/22/2022] [Accepted: 03/25/2022] [Indexed: 12/30/2022]
Abstract
Executive functions, learning, attention, and processing speed are imperative facets of cognitive performance, affected in neuropsychiatric disorders. In clinical studies on different patient groups, recombinant human (rh) erythropoietin (EPO) lastingly improved higher cognition and reduced brain matter loss. Correspondingly, rhEPO treatment of young rodents or EPO receptor (EPOR) overexpression in pyramidal neurons caused remarkable and enduring cognitive improvement, together with enhanced hippocampal long-term potentiation. The 'brain hardware upgrade', underlying these observations, includes an EPO induced ~20% increase in pyramidal neurons and oligodendrocytes in cornu ammonis hippocampi in the absence of elevated DNA synthesis. In parallel, EPO reduces microglia numbers and dampens their activity and metabolism as prerequisites for undisturbed EPO-driven differentiation of pre-existing local neuronal precursors. These processes depend on neuronal and microglial EPOR. This novel mechanism of powerful postnatal neurogenesis, outside the classical neurogenic niches, and on-demand delivery of new cells, paralleled by dendritic spine increase, let us hypothesize a physiological procognitive role of hypoxia-induced endogenous EPO in brain, which we imitate by rhEPO treatment. Here we delineate the brain EPO circle as working model explaining adaptive 'brain hardware upgrade' and improved performance. In this fundamental regulatory circle, neuronal networks, challenged by motor-cognitive tasks, drift into transient 'functional hypoxia', thereby triggering neuronal EPO/EPOR expression.
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8
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The Role of PI3K/AKT and MAPK Signaling Pathways in Erythropoietin Signalization. Int J Mol Sci 2021; 22:ijms22147682. [PMID: 34299300 PMCID: PMC8307237 DOI: 10.3390/ijms22147682] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 12/11/2022] Open
Abstract
Erythropoietin (EPO) is a glycoprotein cytokine known for its pleiotropic effects on various types of cells and tissues. EPO and its receptor EPOR trigger signaling cascades JAK2/STAT5, MAPK, and PI3K/AKT that are interconnected and irreplaceable for cell survival. In this article, we describe the role of the MAPK and PI3K/AKT signaling pathways during red blood cell formation as well as in non-hematopoietic tissues and tumor cells. Although the central framework of these pathways is similar for most of cell types, there are some stage-specific, tissue, and cell-lineage differences. We summarize the current state of research in this field, highlight the novel members of EPO-induced PI3K and MAPK signaling, and in this respect also the differences between erythroid and non-erythroid cells.
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9
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Knorr DY, Hartung D, Schneider K, Hintz L, Pies HS, Heinrich R. Locust Hemolymph Conveys Erythropoietin-Like Cytoprotection via Activation of the Cytokine Receptor CRLF3. Front Physiol 2021; 12:648245. [PMID: 33897456 PMCID: PMC8063046 DOI: 10.3389/fphys.2021.648245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 03/15/2021] [Indexed: 12/15/2022] Open
Abstract
The cytokine receptor-like factor 3 (CRLF3) is an evolutionary conserved class 1 cytokine receptor present in all major eumetazoan groups. Endogenous CRLF3 ligands have not been identified and the physiological responses mediated by mammalian CRLF3 are poorly characterized. Insect CRLF3 is activated by erythropoietin (Epo) and several related molecules that protect mammalian neurons from stress-induced apoptosis. However, insects neither express Epo nor “classical” Epo receptor. Cell-protective effects of insect hemolymph have been described for several species. In this study, we explored the possibility that the endogenous CRLF3 ligand is contained in locust hemolymph. PCR analyses confirmed expression of crfl3-transcripts in neurons and hemocytes of Locusta migratoria and Tribolium castaneum. Survival of locust hemocytes in primary cultures was significantly increased by supplementation of culture medium with locust hemolymph serum. Locust primary neuron cultures were also protected by locust hemolymph, though preceding exposure to fetal bovine serum changed the hemolymph dose-dependency of neuroprotection. Direct comparison of 10% hemolymph serum with recombinant human Epo in its optimal neuroprotective concentration revealed equivalent anti-apoptotic effects on hypoxia-exposed locust neurons. The same concentration of locust hemolymph serum also protected hypoxia-exposed T. castaneum neurons. This indicates that the neuroprotective factor in locust hemolymph is sufficiently conserved in insects to allow activation of neuroprotective receptors in different species. Locust hemolymph-induced neuroprotection in both L. migratoria and T. castaneum was abolished after RNAi-mediated suppression of crlf3-expression. In summary, we report the presence of a conserved endogenous cytokine in locust hemolymph that activates CRLF3 and connected anti-apoptotic processes in hemocytes and neurons. Identification and characterization of the CRLF3 ligand will promote knowledge about cytokine evolution and may unravel cell-protective agents with potential clinical application.
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Affiliation(s)
- Debbra Y Knorr
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August-University Göttingen, Göttingen, Germany
| | - Denise Hartung
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August-University Göttingen, Göttingen, Germany
| | - Kristin Schneider
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August-University Göttingen, Göttingen, Germany
| | - Luzia Hintz
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August-University Göttingen, Göttingen, Germany
| | - Hanna S Pies
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August-University Göttingen, Göttingen, Germany
| | - Ralf Heinrich
- Department of Cellular Neurobiology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Georg-August-University Göttingen, Göttingen, Germany
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Suresh S, Rajvanshi PK, Noguchi CT. The Many Facets of Erythropoietin Physiologic and Metabolic Response. Front Physiol 2020; 10:1534. [PMID: 32038269 PMCID: PMC6984352 DOI: 10.3389/fphys.2019.01534] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/05/2019] [Indexed: 12/30/2022] Open
Abstract
In mammals, erythropoietin (EPO), produced in the kidney, is essential for bone marrow erythropoiesis, and hypoxia induction of EPO production provides for the important erythropoietic response to ischemic stress, such as during blood loss and at high altitude. Erythropoietin acts by binding to its cell surface receptor which is expressed at the highest level on erythroid progenitor cells to promote cell survival, proliferation, and differentiation in production of mature red blood cells. In addition to bone marrow erythropoiesis, EPO causes multi-tissue responses associated with erythropoietin receptor (EPOR) expression in non-erythroid cells such neural cells, endothelial cells, and skeletal muscle myoblasts. Animal and cell models of ischemic stress have been useful in elucidating the potential benefit of EPO affecting maintenance and repair of several non-hematopoietic organs including brain, heart and skeletal muscle. Metabolic and glucose homeostasis are affected by endogenous EPO and erythropoietin administration affect, in part via EPOR expression in white adipose tissue. In diet-induced obese mice, EPO is protective for white adipose tissue inflammation and gives rise to a gender specific response in weight control associated with white fat mass accumulation. Erythropoietin regulation of fat mass is masked in female mice due to estrogen production. EPOR is also expressed in bone marrow stromal cells (BMSC) and EPO administration in mice results in reduced bone independent of the increase in hematocrit. Concomitant reduction in bone marrow adipocytes and bone morphogenic protein suggests that high EPO inhibits adipogenesis and osteogenesis. These multi-tissue responses underscore the pleiotropic potential of the EPO response and may contribute to various physiological manifestations accompanying anemia or ischemic response and pharmacological uses of EPO.
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Affiliation(s)
- Sukanya Suresh
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Praveen Kumar Rajvanshi
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Constance T Noguchi
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
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11
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Hahn N, Büschgens L, Schwedhelm-Domeyer N, Bank S, Geurten BRH, Neugebauer P, Massih B, Göpfert MC, Heinrich R. The Orphan Cytokine Receptor CRLF3 Emerged With the Origin of the Nervous System and Is a Neuroprotective Erythropoietin Receptor in Locusts. Front Mol Neurosci 2019; 12:251. [PMID: 31680856 PMCID: PMC6797617 DOI: 10.3389/fnmol.2019.00251] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 09/27/2019] [Indexed: 12/19/2022] Open
Abstract
The orphan cytokine receptor-like factor 3 (CRLF3) was identified as a neuroprotective erythropoietin receptor in locust neurons and emerged with the evolution of the eumetazoan nervous system. Human CRLF3 belongs to class I helical cytokine receptors that mediate pleiotropic cellular reactions to injury and diverse physiological challenges. It is expressed in various tissues including the central nervous system but its ligand remains unidentified. A CRLF3 ortholog in the holometabolous beetle Tribolium castaneum was recently shown to induce anti-apoptotic mechanisms upon stimulation with human recombinant erythropoietin. To test the hypothesis that CRLF3 represents an ancient cell-protective receptor for erythropoietin-like cytokines, we investigated its presence across metazoan species. Furthermore, we examined CRLF3 expression and function in the hemimetabolous insect Locusta migratoria. Phylogenetic analysis of CRLF3 sequences indicated that CRLF3 is absent in Porifera, Placozoa and Ctenophora, all lacking the traditional nervous system. However, it is present in all major eumetazoan groups ranging from cnidarians over protostomians to mammals. The CRLF3 sequence is highly conserved and abundant amongst vertebrates. In contrast, relatively few invertebrates express CRLF3 and these sequences show greater variability, suggesting frequent loss due to low functional importance. In L. migratoria, we identified the transcript Lm-crlf3 by RACE-PCR and detected its expression in locust brain, skeletal muscle and hemocytes. These findings correspond to the ubiquitous expression of crlf3 in mammalian tissues. We demonstrate that the sole addition of double-stranded RNA to the culture medium (called soaking RNA interference) specifically interferes with protein expression in locust primary brain cell cultures. This technique was used to knock down Lm-crlf3 expression and to abolish its physiological function. We confirmed that recombinant human erythropoietin rescues locust brain neurons from hypoxia-induced apoptosis and showed that this neuroprotective effect is absent after knocking down Lm-crlf3. Our results affirm the erythropoietin-induced neuroprotective function of CRLF3 in a second insect species from a different taxonomic group. They suggest that the phylogenetically conserved CRLF3 receptor may function as a cell protective receptor for erythropoietin or a structurally related cytokine also in other animals including vertebrate and mammalian species.
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Affiliation(s)
- Nina Hahn
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Luca Büschgens
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Nicola Schwedhelm-Domeyer
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Sarah Bank
- Department of Animal Evolution and Biodiversity, Institute for Zoology & Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Bart R. H. Geurten
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Pia Neugebauer
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Bita Massih
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Martin C. Göpfert
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
| | - Ralf Heinrich
- Department of Cellular Neurobiology, Institute for Zoology and Anthropology, Georg-August University of Göttingen, Göttingen, Germany
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12
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Dmytriyeva O, Belmeguenai A, Bezin L, Soud K, Drucker Woldbye DP, Gøtzsche CR, Pankratova S. Short erythropoietin-derived peptide enhances memory, improves long-term potentiation, and counteracts amyloid beta–induced pathology. Neurobiol Aging 2019; 81:88-101. [DOI: 10.1016/j.neurobiolaging.2019.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 03/27/2019] [Accepted: 05/06/2019] [Indexed: 12/23/2022]
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Gyetvai G, Roe C, Heikal L, Ghezzi P, Mengozzi M. Leukemia inhibitory factor inhibits erythropoietin-induced myelin gene expression in oligodendrocytes. Mol Med 2018; 24:51. [PMID: 30261841 PMCID: PMC6161334 DOI: 10.1186/s10020-018-0052-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 09/14/2018] [Indexed: 12/27/2022] Open
Abstract
Background The pro-myelinating effects of leukemia inhibitory factor (LIF) and other cytokines of the gp130 family, including oncostatin M (OSM) and ciliary neurotrophic factor (CNTF), have long been known, but controversial results have also been reported. We recently overexpressed erythropoietin receptor (EPOR) in rat central glia-4 (CG4) oligodendrocyte progenitor cells (OPCs) to study the mechanisms mediating the pro-myelinating effects of erythropoietin (EPO). In this study, we investigated the effect of co-treatment with EPO and LIF. Methods Gene expression in undifferentiated and differentiating CG4 cells in response to EPO and LIF was analysed by DNA microarrays and by RT-qPCR. Experiments were performed in biological replicates of N ≥ 4. Functional annotation and biological term enrichment was performed using DAVID (Database for Annotation, Visualization and Integrated Discovery). The gene-gene interaction network was visualised using STRING (Search Tool for the Retrieval of Interacting Genes). Results In CG4 cells treated with 10 ng/ml of EPO and 10 ng/ml of LIF, EPO-induced myelin oligodendrocyte glycoprotein (MOG) expression, measured at day 3 of differentiation, was inhibited ≥4-fold (N = 5, P < 0.001). Inhibition of EPO-induced MOG was also observed with OSM and CNTF. Analysis of the gene expression profile of CG4 differentiating cells treated for 20 h with EPO and LIF revealed LIF inhibition of EPO-induced genes involved in lipid transport and metabolism, previously identified as positive regulators of myelination in this system. In addition, among the genes induced by LIF, and not by differentiation or by EPO, the role of suppressor of cytokine signaling 3 (SOCS3) and toll like receptor 2 (TLR2) as negative regulators of myelination was further explored. LIF-induced SOCS3 was associated with MOG inhibition; Pam3, an agonist of TLR2, inhibited EPO-induced MOG expression, suggesting that TLR2 is functional and its activation decreases myelination. Conclusions Cytokines of the gp130 family may have negative effects on myelination, depending on the cytokine environment. Electronic supplementary material The online version of this article (10.1186/s10020-018-0052-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Georgina Gyetvai
- Department of Clinical and Experimental Medicine, Brighton & Sussex Medical School, Brighton, BN1 9PS, UK
| | - Cieron Roe
- Department of Clinical and Experimental Medicine, Brighton & Sussex Medical School, Brighton, BN1 9PS, UK
| | - Lamia Heikal
- Department of Clinical and Experimental Medicine, Brighton & Sussex Medical School, Brighton, BN1 9PS, UK
| | - Pietro Ghezzi
- Department of Clinical and Experimental Medicine, Brighton & Sussex Medical School, Brighton, BN1 9PS, UK.
| | - Manuela Mengozzi
- Department of Clinical and Experimental Medicine, Brighton & Sussex Medical School, Brighton, BN1 9PS, UK
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Ostrowski D, Heinrich R. Alternative Erythropoietin Receptors in the Nervous System. J Clin Med 2018; 7:E24. [PMID: 29393890 PMCID: PMC5852440 DOI: 10.3390/jcm7020024] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 01/24/2018] [Accepted: 01/26/2018] [Indexed: 12/18/2022] Open
Abstract
In addition to its regulatory function in the formation of red blood cells (erythropoiesis) in vertebrates, Erythropoietin (Epo) contributes to beneficial functions in a variety of non-hematopoietic tissues including the nervous system. Epo protects cells from apoptosis, reduces inflammatory responses and supports re-establishment of compromised functions by stimulating proliferation, migration and differentiation to compensate for lost or injured cells. Similar neuroprotective and regenerative functions of Epo have been described in the nervous systems of both vertebrates and invertebrates, indicating that tissue-protective Epo-like signaling has evolved prior to its erythropoietic function in the vertebrate lineage. Epo mediates its erythropoietic function through a homodimeric Epo receptor (EpoR) that is also widely expressed in the nervous system. However, identification of neuroprotective but non-erythropoietic Epo splice variants and Epo derivatives indicated the existence of other types of Epo receptors. In this review, we summarize evidence for potential Epo receptors that might mediate Epo's tissue-protective function in non-hematopoietic tissue, with focus on the nervous system. In particular, besides EpoR, we discuss three other potential neuroprotective Epo receptors: (1) a heteroreceptor consisting of EpoR and common beta receptor (βcR), (2) the Ephrin (Eph) B4 receptor and (3) the human orphan cytokine receptor-like factor 3 (CRLF3).
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Affiliation(s)
- Daniela Ostrowski
- Department of Biology, Truman State University, Kirksville, MO 63501, USA.
| | - Ralf Heinrich
- Department of Cellular Neurobiology, Institute for Zoology, Georg-August-University Göttingen, 37073 Göttingen, Germany.
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Hahn N, Knorr DY, Liebig J, Wüstefeld L, Peters K, Büscher M, Bucher G, Ehrenreich H, Heinrich R. The Insect Ortholog of the Human Orphan Cytokine Receptor CRLF3 Is a Neuroprotective Erythropoietin Receptor. Front Mol Neurosci 2017; 10:223. [PMID: 28769759 PMCID: PMC5509957 DOI: 10.3389/fnmol.2017.00223] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 06/28/2017] [Indexed: 12/26/2022] Open
Abstract
The cytokine erythropoietin (Epo) mediates various cell homeostatic responses to environmental challenges and pathological insults. While stimulation of vertebrate erythrocyte production is mediated by homodimeric “classical” Epo receptors, alternative receptors are involved in neuroprotection. However, their identity remains enigmatic due to complex cytokine ligand and receptor interactions and conflicting experimental results. Besides the classical Epo receptor, the family of type I cytokine receptors also includes the poorly characterized orphan cytokine receptor-like factor 3 (CRLF3) present in vertebrates including human and various insect species. By making use of the more simple genetic makeup of insect model systems, we studied whether CRLF3 is a neuroprotective Epo receptor in animals. We identified a single ortholog of CRLF3 in the beetle Tribolium castaneum, and established protocols for primary neuronal cell cultures from Tribolium brains and efficient in vitro RNA interference. Recombinant human Epo as well as the non-erythropoietic Epo splice variant EV-3 increased the survival of serum-deprived brain neurons, confirming the previously described neuroprotective effect of Epo in insects. Moreover, Epo completely prevented hypoxia-induced apoptotic cell death of primary neuronal cultures. Knockdown of CRLF3 expression by RNA interference with two different double stranded RNA (dsRNA) fragments abolished the neuroprotective effect of Epo, indicating that CRLF3 is a crucial component of the insect Epo-responsive receptor. This suggests that a common urbilaterian ancestor of the orphan human and insect cytokine receptor CRLF3 served as a neuroprotective receptor for an Epo-like cytokine. Our work also suggests that vertebrate CRLF3, like its insect ortholog, might represent a tissue protection-mediating receptor.
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Affiliation(s)
- Nina Hahn
- Department of Cellular Neurobiology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
| | - Debbra Y Knorr
- Department of Cellular Neurobiology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
| | - Johannes Liebig
- Department of Cellular Neurobiology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
| | - Liane Wüstefeld
- Clinical Neuroscience, Max Planck Institute of Experimental MedicineGoettingen, Germany.,DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB)Goettingen, Germany
| | - Karsten Peters
- Department of Cellular Neurobiology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
| | - Marita Büscher
- Department of Evolutionary Developmental Biology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
| | - Gregor Bucher
- Department of Evolutionary Developmental Biology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
| | - Hannelore Ehrenreich
- Clinical Neuroscience, Max Planck Institute of Experimental MedicineGoettingen, Germany.,DFG Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB)Goettingen, Germany
| | - Ralf Heinrich
- Department of Cellular Neurobiology, Institute for Zoology, Georg-August-University GoettingenGoettingen, Germany
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