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Pu J, Chen D, Chu S, Chen Z, Fan Y, Zhang Z, Loor JJ, Mao Y, Yang Z. miR-122 regulates the JAK-STAT signalling pathway by down-regulating EPO in the mammary gland during Streptococcus agalactiae-induced mastitis. ITALIAN JOURNAL OF ANIMAL SCIENCE 2020. [DOI: 10.1080/1828051x.2020.1825996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Junhua Pu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Daijie Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Shuangfeng Chu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Zhi Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Yongliang Fan
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Zhipeng Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Juan J. Loor
- Department of Animal Sciences, University of Illinois, Urbana, IL, USA
| | - Yongjiang Mao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Zhangping Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
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Fibach E, Rachmilewitz EA. Does erythropoietin have a role in the treatment of β-hemoglobinopathies? Hematol Oncol Clin North Am 2014; 28:249-63. [PMID: 24589265 DOI: 10.1016/j.hoc.2013.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review presents the indications and contraindications (pros and cons) for the potential use of erythropoietin (Epo) as a treatment in β-thalassemia and sickle cell anemia (SCA). Its high cost and route of administration (by injection) are obvious obstacles, especially in underdeveloped countries, where thalassemia is prevalent. We believe that from the data summarized in this review, the time has come to define, by studying in vitro and in vivo models, as well as by controlled clinical trials, the rationale for treating patients with various forms of thalassemia and SCA with Epo alone or in combination with other medications.
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Affiliation(s)
- Eitan Fibach
- Department of Hematology, Hadassah-Hebrew University Medical Center, Ein-Kerem, Jerusalem 91120, Israel.
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Amer J, Dana M, Fibach E. The antioxidant effect of erythropoietin on thalassemic blood cells. Anemia 2010; 2010:978710. [PMID: 21490911 PMCID: PMC3065733 DOI: 10.1155/2010/978710] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Accepted: 11/14/2010] [Indexed: 01/18/2023] Open
Abstract
Because of its stimulating effect on RBC production, erythropoietin (Epo) is used to treat anemia, for example, in patients on dialysis or on chemotherapy. In β-thalassemia, where Epo levels are low relative to the degree of anemia, Epo treatment improves the anemia state. Since RBC and platelets of these patients are under oxidative stress, which may be involved in anemia and thromboembolic complications, we investigated Epo as an antioxidant. Using flow-cytometry technology, we found that in vitro treatment with Epo of blood cells from these patients increased their glutathione content and reduced their reactive oxygen species, membrane lipid peroxides, and external phosphatidylserine. This resulted in reduced susceptibility of RBC to undergo hemolysis and phagocytosis. Injection of Epo into heterozygous (Hbb(th3/+)) β-thalassemic mice reduced the oxidative markers within 3 hours. Our results suggest that, in addition to stimulating RBC and fetal hemoglobin production, Epo might alleviate symptoms of hemolytic anemias as an antioxidant.
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Affiliation(s)
- Johnny Amer
- Department of Hematology, Hadassah-Hebrew University Medical Center, Ein-Kerem, 91120 Jerusalem, Israel
| | - Mutaz Dana
- Department of Hematology, Hadassah-Hebrew University Medical Center, Ein-Kerem, 91120 Jerusalem, Israel
| | - Eitan Fibach
- Department of Hematology, Hadassah-Hebrew University Medical Center, Ein-Kerem, 91120 Jerusalem, Israel
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Gregory RC, Lord KA, Panek LB, Gaines P, Dillon SB, Wojchowski DM. Subtraction cloning and initial characterization of novel epo-immediate response genes. Cytokine 2000; 12:845-57. [PMID: 10880228 DOI: 10.1006/cyto.2000.0686] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent studies of erythropoietin (Epo) receptor signalling suggest that signals for mitogenesis, survival and differentiation are relayed efficiently by receptor forms lacking at least seven of eight cytoplasmic (phospho)tyrosine [(P)Y] sites for effector recruitment. While such receptor forms are known to activate Jak2 and a limited set of known immediate response genes (IRGs), the complex activities they exert predict the existence of additional target genes. To identify such targets, a minimal Epo receptor chimera was expressed in Epo-responsive erythroid SKT6 cells, and genes whose transcription is induced via this active receptor form were cloned by subtractive hybridization. Several known genes not previously linked to Epo signalling were discovered to be Epo IRGs including two which may further propagate Epo signals [Prl1 tyrosine phosphatase and receptor activator of of NFkappaB (Rank)], and three regulators of protein synthesis (EF1alpha, eIF3-p66 and Nat1). Several Epo IRGs were novel murine clones including FM2 and FM6 which proved to represent broadly expressed IRGs, and FM3 and FL10 which were induced primarily in haematopoietic cells. Interestingly, FL10 proved to correspond to a recently discovered regulator of yeast mating-type switching, and was induced by Epo in vivo. Thus, several new Epo signalling targets are described, which may modulate haematopoietic cell development.
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Affiliation(s)
- R C Gregory
- Departments of Biochemistry & Molecular Biology, The Pennsylvania State University, University Park 16802, USA
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Wojchowski DM, Gregory RC, Miller CP, Pandit AK, Pircher TJ. Signal transduction in the erythropoietin receptor system. Exp Cell Res 1999; 253:143-56. [PMID: 10579919 DOI: 10.1006/excr.1999.4673] [Citation(s) in RCA: 180] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Events relayed via the single transmembrane receptor for erythropoietin (Epo) are essential for the development of committed erythroid progenitor cells beyond the colony-forming unit-erythroid stage, and this clearly involves Epo's inhibition of programmed cell death (PCD). Less well resolved, however, are issues regarding the precise nature of Epo-dependent antiapoptotic mechanisms, the extent to which Epo might also promote mitogenesis and/or terminal erythroid differentiation, and the essential vs modulatory nature of certain Epo receptor cytoplasmic subdomains, signal transducing factors, and downstream pathways. Accordingly, this review focuses on the following aspects of Epo signal transduction: (1) Epo receptor/Jak2 activation mechanisms; (2) the critical vs dispensable nature of (P)Y sites and SH2 domain-encoding effectors in survival, growth, and differentiation responses; (3) primary mechanisms by which Epo inhibits PCD; (4) the integration of signals relayed by coexpressed and possibly directly interacting cytokine receptors; and (5) predictions regarding effector function which are provided by the association of certain primary and familial polycythemias with mutated human Epo receptor forms.
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Affiliation(s)
- D M Wojchowski
- Program in Cell & Developmental Biology, Pennsylvania State University, University Park, Pennsylvania, 16802, USA.
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de Groot RP, Coffer PJ, Koenderman L. Regulation of proliferation, differentiation and survival by the IL-3/IL-5/GM-CSF receptor family. Cell Signal 1998; 10:619-28. [PMID: 9794243 DOI: 10.1016/s0898-6568(98)00023-0] [Citation(s) in RCA: 169] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The receptors for the I1-3/IL-5/GM-CSF cytokine family are composed of a heterodimeric complex of a cytokine-specific alpha chain and a common beta chain (betac). Binding of IL-3/IL-5/GM-CSF to their respective receptors rapidly induces activation of multiple intracellular signalling pathways, including the Ras-Raf-ERK, the JAK/STAT, the phosphatidylinositol 3-kinase PKB, and the JNK/SAPK and p38 signalling pathways. This review focuses on recent advancements in understanding how these different signalling pathways are activated by IL-3/IL-5/GM-CSF receptors, and how the individual pathways contribute to the pleiotropic effects of IL-3/IL-5/GM-CSF on their target cells, including proliferation, differentiation, survival, and effector functions.
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Affiliation(s)
- R P de Groot
- Department of Pulmonary Diseases, University Hospital Utrecht, The Netherlands.
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Kaempfer R. Cytokine and interferon research in Israel. Cytokine Growth Factor Rev 1998; 9:99-108. [PMID: 9754704 DOI: 10.1016/s1359-6101(98)00008-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
From its inception, the field of interferons and cytokines has occupied an important position in Israeli biological science. With the Second Joint Meeting of the International Society for Interferon and Cytokine Research and the International Cytokine Society taking place in Jerusalem in 1998, it is timely to review here current Israeli research on the biology, gene regulation, receptors, signal transduction, mode of action and clinical aspects of interferons and cytokines.
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Affiliation(s)
- R Kaempfer
- Department of Molecular Virology, The Hebrew University-Hadassah Medical School, Jerusalem, Israel.
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Ofir R, Horowitz S, Wu Q, Weinstein Y. The ftsZ gene as a tool for detection of Mycoplasma fermentans. Mol Cell Probes 1998; 12:85-92. [PMID: 9633043 DOI: 10.1006/mcpr.1998.0157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mycoplasma fermentans was reported as a common contaminant of cell cultures, and was shown to either induce or suppress several immunological functions. A strain of M. fermentans was recently isolated from a mouse T-lymphoma cell line, which differs from other M. fermentans strains by its growth characteristics and was designated (in the authors' records) as strain 609. Using the differential display technique (DD), a differentially expressed gene that was identified as the M. fermentans 609 ftsZ gene was isolated. Comparison of the nucleotide sequence of the M. fermentans 609 ftsZ gene to other ftsZ genes showed a 98% homology with Mycoplasma fermentans strain K7 and approximately 50% homology with Mycoplasma pulmonis and Mycoplasma genitalium. Comparison of the putative amino acid sequences of the FtsZ proteins showed similar homology. A polymerase chain reaction (PCR) assay to detect the presence of this ftsZ gene was established; it is a fast and convenient assay to detect infection of cells by the M. fermentans species. This work demonstrates that: (i) DD can be used as a useful technique to identify and isolate mycoplasmal genes from infected cells; and (ii) the ftsZ gene can be a useful marker to distinguish between different species of mycoplasma.
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Affiliation(s)
- R Ofir
- Department of Microbiology and Immunology, Faculty of Health Sciences, Ben Gurion University, Negev, Israel
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