1
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Swarnkar G, Semenkovich NP, Arra M, Mims DK, Naqvi SK, Peterson T, Mbalaviele G, Wu CL, Abu-Amer Y. DNA hypomethylation ameliorates erosive inflammatory arthritis by modulating interferon regulatory factor-8. Proc Natl Acad Sci U S A 2024; 121:e2310264121. [PMID: 38319963 PMCID: PMC10873594 DOI: 10.1073/pnas.2310264121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 01/08/2024] [Indexed: 02/08/2024] Open
Abstract
Epigenetic regulation plays a crucial role in the pathogenesis of autoimmune diseases such as inflammatory arthritis. DNA hypomethylating agents, such as decitabine (DAC), have been shown to dampen inflammation and restore immune homeostasis. In the present study, we demonstrate that DAC elicits potent anti-inflammatory effects and attenuates disease symptoms in several animal models of arthritis. Transcriptomic and epigenomic profiling show that DAC-mediated hypomethylation regulates a wide range of cell types in arthritis, altering the differentiation trajectories of anti-inflammatory macrophage populations, regulatory T cells, and tissue-protective synovial fibroblasts (SFs). Mechanistically, DAC-mediated demethylation of intragenic 5'-Cytosine phosphate Guanine-3' (CpG) islands of the transcription factor Irf8 (interferon regulatory factor 8) induced its re-expression and promoted its repressor activity. As a result, DAC restored joint homeostasis by resetting the transcriptomic signature of negative regulators of inflammation in synovial macrophages (MerTK, Trem2, and Cx3cr1), TREGs (Foxp3), and SFs (Pdpn and Fapα). In conclusion, we found that Irf8 is necessary for the inhibitory effect of DAC in murine arthritis and that direct expression of Irf8 is sufficient to significantly mitigate arthritis.
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Affiliation(s)
- Gaurav Swarnkar
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, MO63110
| | | | - Manoj Arra
- Department of Emergency Medicine, Washington University School of Medicine, St. Louis, MO63110
| | - Dorothy K. Mims
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, MO63110
| | - Syeda Kanwal Naqvi
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, MO63110
| | - Timothy Peterson
- Department of Medicine, Washington University School of Medicine, St. Louis, MO63110
- HealthSpan Technologies, Inc, St. Louis, MO63110
| | - Gabriel Mbalaviele
- Department of Medicine, Washington University School of Medicine, St. Louis, MO63110
| | - Chia-Lung Wu
- Department of Orthopedics and Physical Performance, University of Rochester, Rochester, NY14642
| | - Yousef Abu-Amer
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, MO63110
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO63110
- Shriners Hospital for Children, St. Louis, MO63110
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2
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Jeljeli MM, Adamopoulos IE. Innate immune memory in inflammatory arthritis. Nat Rev Rheumatol 2023; 19:627-639. [PMID: 37674048 PMCID: PMC10721491 DOI: 10.1038/s41584-023-01009-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/21/2023] [Indexed: 09/08/2023]
Abstract
The concept of immunological memory was demonstrated in antiquity when protection against re-exposure to pathogens was observed during the plague of Athens. Immunological memory has been linked with the adaptive features of T and B cells; however, in the past decade, evidence has demonstrated that innate immune cells can exhibit memory, a phenomenon called 'innate immune memory' or 'trained immunity'. Innate immune memory is currently being defined and is transforming our understanding of chronic inflammation and autoimmunity. In this Review, we provide an up-to-date overview of the memory-like features of innate immune cells in inflammatory arthritis and the crosstalk between chronic inflammatory milieu and cell reprogramming. Aberrant pro-inflammatory signalling, including cytokines, regulates the metabolic and epigenetic reprogramming of haematopoietic progenitors, leading to exacerbated inflammatory responses and osteoclast differentiation, in turn leading to bone destruction. Moreover, imprinted memory on mature cells including terminally differentiated osteoclasts alters responsiveness to therapies and modifies disease outcomes, commonly manifested by persistent inflammatory flares and relapse following medication withdrawal.
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Affiliation(s)
- Maxime M Jeljeli
- Department of Rheumatology and Clinical Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Iannis E Adamopoulos
- Department of Rheumatology and Clinical Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
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3
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Rivera M, Zhang H, Pham J, Isquith J, Zhou QJ, Sasik R, Mark A, Ma W, Holm F, Fisch KM, Kuo DJ, Jamieson C, Jiang Q. Malignant A-to-I RNA editing by ADAR1 drives T-cell acute lymphoblastic leukemia relapse via attenuating dsRNA sensing. RESEARCH SQUARE 2023:rs.3.rs-2444524. [PMID: 37398458 PMCID: PMC10312963 DOI: 10.21203/rs.3.rs-2444524/v2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Leukemia initiating cells (LICs) are regarded as the origin of leukemia relapse and therapeutic resistance. Identifying direct stemness determinants that fuel LIC self-renewal is critical for developing targeted approaches to eliminate LICs and prevent relapse. Here, we show that the RNA editing enzyme ADAR1 is a crucial stemness factor that promotes LIC self-renewal by attenuating aberrant double-stranded RNA (dsRNA) sensing. Elevated adenosine-to-inosine (A-to-I) editing is a common attribute of relapsed T-ALL regardless of molecular subtypes. Consequently, knockdown of ADAR1 severely inhibits LIC self-renewal capacity and prolongs survival in T-ALL PDX models. Mechanistically, ADAR1 directs hyper-editing of immunogenic dsRNA and retains unedited nuclear dsRNA to avoid detection by the innate immune sensor MDA5. Moreover, we uncovered that the cell intrinsic level of MDA5 dictates the dependency on ADAR1-MDA5 axis in T-ALL. Collectively, our results show that ADAR1 functions as a self-renewal factor that limits the sensing of endogenous dsRNA. Thus, targeting ADAR1 presents a safe and effective therapeutic strategy for eliminating T-ALL LICs.
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Affiliation(s)
- Maria Rivera
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
- Moores Cancer Center, La Jolla, CA 92037, USA
| | - Haoran Zhang
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
- Moores Cancer Center, La Jolla, CA 92037, USA
| | - Jessica Pham
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Jane Isquith
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Qingchen Jenny Zhou
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
- Moores Cancer Center, La Jolla, CA 92037, USA
| | - Roman Sasik
- Center for Computational Biology & Bioinformatics (CCBB), University of California, San Diego, La Jolla, 92093-0681
| | - Adam Mark
- Center for Computational Biology & Bioinformatics (CCBB), University of California, San Diego, La Jolla, 92093-0681
| | - Wenxue Ma
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Frida Holm
- Department of Women’s and Children’s Health, Division of Pediatric Oncology and Surgery, Karolinska Institutet, Sweden
| | - Kathleen M Fisch
- Center for Computational Biology & Bioinformatics (CCBB), University of California, San Diego, La Jolla, 92093-0681
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Diego, La Jolla, CA
| | - Dennis John Kuo
- Moores Cancer Center, La Jolla, CA 92037, USA
- Division of Pediatric Hematology-Oncology, Rady Children’s Hospital San Diego, University of California, San Diego, CA
| | - Catriona Jamieson
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
- Moores Cancer Center, La Jolla, CA 92037, USA
| | - Qingfei Jiang
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
- Moores Cancer Center, La Jolla, CA 92037, USA
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4
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Barisas DAG, Kabir AU, Wu J, Krchma K, Kim M, Subramanian M, Zinselmeyer BH, Stewart CL, Choi K. Tumor-derived interleukin-1α and leukemia inhibitory factor promote extramedullary hematopoiesis. PLoS Biol 2023; 21:e3001746. [PMID: 37134077 PMCID: PMC10155962 DOI: 10.1371/journal.pbio.3001746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 02/06/2023] [Indexed: 05/04/2023] Open
Abstract
Extramedullary hematopoiesis (EMH) expands hematopoietic capacity outside of the bone marrow in response to inflammatory conditions, including infections and cancer. Because of its inducible nature, EMH offers a unique opportunity to study the interaction between hematopoietic stem and progenitor cells (HSPCs) and their niche. In cancer patients, the spleen frequently serves as an EMH organ and provides myeloid cells that may worsen pathology. Here, we examined the relationship between HSPCs and their splenic niche in EMH in a mouse breast cancer model. We identify tumor produced IL-1α and leukemia inhibitory factor (LIF) acting on splenic HSPCs and splenic niche cells, respectively. IL-1α induced TNFα expression in splenic HSPCs, which then activated splenic niche activity, while LIF induced proliferation of splenic niche cells. IL-1α and LIF display cooperative effects in activating EMH and are both up-regulated in some human cancers. Together, these data expand avenues for developing niche-directed therapies and further exploring EMH accompanying inflammatory pathologies like cancer.
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Affiliation(s)
- Derek A. G. Barisas
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Immunology Program, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Medical Scientist Training Program, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Ashraf Ul Kabir
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Jun Wu
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Karen Krchma
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Minseo Kim
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Madhav Subramanian
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Bernd H. Zinselmeyer
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Colin L. Stewart
- Developmental and Regenerative Biology, A*STAR Skin Research Laboratories, Singapore, Singapore
| | - Kyunghee Choi
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- Immunology Program, Washington University School of Medicine, St. Louis, Missouri, United States of America
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5
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Ruan B, Paulson RF. Metabolic regulation of stress erythropoiesis, outstanding questions, and possible paradigms. Front Physiol 2023; 13:1063294. [PMID: 36685181 PMCID: PMC9849390 DOI: 10.3389/fphys.2022.1063294] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 12/21/2022] [Indexed: 01/07/2023] Open
Abstract
Steady state erythropoiesis produces new erythrocytes at a constant rate to replace the senescent cells that are removed by macrophages in the liver and spleen. However, infection and tissue damage disrupt the production of erythrocytes by steady state erythropoiesis. During these times, stress erythropoiesis is induced to compensate for the loss of erythroid output. The strategy of stress erythropoiesis is different than steady state erythropoiesis. Stress erythropoiesis generates a wave of new erythrocytes to maintain homeostasis until steady state conditions are resumed. Stress erythropoiesis relies on the rapid proliferation of immature progenitor cells that do not differentiate until the increase in serum Erythropoietin (Epo) promotes the transition to committed progenitors that enables their synchronous differentiation. Emerging evidence has revealed a central role for cell metabolism in regulating the proliferation and differentiation of stress erythroid progenitors. During the initial expansion stage, the immature progenitors are supported by extensive metabolic changes which are designed to direct the use of glucose and glutamine to increase the biosynthesis of macromolecules necessary for cell growth and division. At the same time, these metabolic changes act to suppress the expression of genes involved in erythroid differentiation. In the subsequent transition stage, changes in niche signals alter progenitor metabolism which in turn removes the inhibition of erythroid differentiation generating a bolus of new erythrocytes to alleviate anemia. This review summarizes what is known about the metabolic regulation of stress erythropoiesis and discusses potential mechanisms for metabolic regulation of proliferation and differentiation.
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Affiliation(s)
- Baiye Ruan
- Pathobiology Graduate Program, Penn State University, University Park, PA, United States
| | - Robert F. Paulson
- Pathobiology Graduate Program, Penn State University, University Park, PA, United States
- Center for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Penn State University, University Park, PA, United States
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6
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Grusanovic S, Danek P, Kuzmina M, Adamcova MK, Burocziova M, Mikyskova R, Vanickova K, Kosanovic S, Pokorna J, Reinis M, Brdicka T, Alberich‐Jorda M. Chronic inflammation decreases HSC fitness by activating the druggable Jak/Stat3 signaling pathway. EMBO Rep 2022; 24:e54729. [PMID: 36341527 PMCID: PMC9827550 DOI: 10.15252/embr.202254729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 10/13/2022] [Accepted: 10/24/2022] [Indexed: 11/09/2022] Open
Abstract
Chronic inflammation represents a major threat to human health since long-term systemic inflammation is known to affect distinct tissues and organs. Recently, solid evidence demonstrated that chronic inflammation affects hematopoiesis; however, how chronic inflammation affects hematopoietic stem cells (HSCs) on the mechanistic level is poorly understood. Here, we employ a mouse model of chronic multifocal osteomyelitis (CMO) to assess the effects of a spontaneously developed inflammatory condition on HSCs. We demonstrate that hematopoietic and nonhematopoietic compartments in CMO BM contribute to HSC expansion and impair their function. Remarkably, our results suggest that the typical features of murine multifocal osteomyelitis and the HSC phenotype are mechanistically decoupled. We show that the CMO environment imprints a myeloid gene signature and imposes a pro-inflammatory profile on HSCs. We identify IL-6 and the Jak/Stat3 signaling pathway as critical mediators. However, while IL-6 and Stat3 blockage reduce HSC numbers in CMO mice, only inhibition of Stat3 activity significantly rescues their fitness. Our data emphasize the detrimental effects of chronic inflammation on stem cell function, opening new venues for treatment.
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Affiliation(s)
- Srdjan Grusanovic
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic,Faculty of ScienceCharles UniversityPragueCzech Republic,Childhood Leukaemia Investigation PragueDepartment of Pediatric Haematology and Oncology2nd Faculty of MedicineCharles University in PragueUniversity Hospital MotolPragueCzech Republic
| | - Petr Danek
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic
| | - Maria Kuzmina
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic,Faculty of ScienceCharles UniversityPragueCzech Republic
| | - Miroslava K Adamcova
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic,Childhood Leukaemia Investigation PragueDepartment of Pediatric Haematology and Oncology2nd Faculty of MedicineCharles University in PragueUniversity Hospital MotolPragueCzech Republic
| | - Monika Burocziova
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic
| | - Romana Mikyskova
- Department of Immunological and Tumor modelsInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic
| | - Karolina Vanickova
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic,Faculty of ScienceCharles UniversityPragueCzech Republic
| | - Sladjana Kosanovic
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic,Faculty of ScienceCharles UniversityPragueCzech Republic
| | - Jana Pokorna
- Department of Leukocyte signalingInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic
| | - Milan Reinis
- Department of Immunological and Tumor modelsInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic
| | - Tomas Brdicka
- Department of Leukocyte signalingInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic
| | - Meritxell Alberich‐Jorda
- Department of Hemato‐OncologyInstitute of Molecular Genetics of the Czech Academy of SciencesPragueCzech Republic,Childhood Leukaemia Investigation PragueDepartment of Pediatric Haematology and Oncology2nd Faculty of MedicineCharles University in PragueUniversity Hospital MotolPragueCzech Republic
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7
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Urao N, Liu J, Takahashi K, Ganesh G. Hematopoietic Stem Cells in Wound Healing Response. Adv Wound Care (New Rochelle) 2022; 11:598-621. [PMID: 34353116 PMCID: PMC9419985 DOI: 10.1089/wound.2021.0065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Significance: Emerging evidence has shown a link between the status of hematopoietic stem cells (HSCs) and wound healing responses. Thus, better understanding HSCs will contribute to further advances in wound healing research. Recent Advances: Myeloid cells such as neutrophils and monocyte-derived macrophages are critical players in the process of wound healing. HSCs actively respond to wound injury and other tissue insults, including infection and produce the effector myeloid cells, and a failing of the HSC response can result in impaired wound healing. Technological advances such as transcriptome at single-cell resolution, epigenetics, three-dimensional imaging, transgenic animals, and animal models, have provided novel concepts of myeloid generation (myelopoiesis) from HSCs, and have revealed cell-intrinsic and -extrinsic mechanisms that can impact HSC functions in the context of health conditions. Critical Issues: The newer concepts include-the programmed cellular fate at a differentiation stage that is used to be considered as the multilineage, the signaling pathways that can activate HSCs directly and indirectly, the mechanisms that can deteriorate HSCs, the roles and remodeling of the surrounding environment for HSCs and their progenitors (the niche). Future Directions: The researches on HSCs, which produce blood cells, should contribute to the development of blood biomarkers predicting a risk of chronic wounds, which may transform clinical practice of wound care with precision medicine for patients at high risk of poor healing.
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Affiliation(s)
- Norifumi Urao
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA.,Correspondence: Department of Pharmacology, State University of New York Upstate Medical University, 766 Irving Avenue, Weiskotten Hall Room 5322, Syracuse, NY 13210, USA.
| | - Jinghua Liu
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Kentaro Takahashi
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Gayathri Ganesh
- Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York, USA
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8
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Inflammation and myeloid malignancy: Quenching the flame. Blood 2022; 140:1067-1074. [PMID: 35468199 DOI: 10.1182/blood.2021015162] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/22/2022] [Indexed: 01/19/2023] Open
Abstract
Chronic inflammation with aging ("inflammaging") plays a prominent role in the pathogenesis of myeloid malignancies. Aberrant inflammatory activity impacts many different cells in the marrow, including normal blood and stromal marrow elements and leukemic cells, in unique and distinct ways. Inflammation can promote selective clonal expansion through differential immune-mediated suppression of normal hematopoietic cells and malignant clones. We review these complex roles, how they can be understood by separating cell-intrinsic from extrinsic effects, and how this informs future clinical trials.
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9
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Differentiation therapy for myeloid malignancies: beyond cytotoxicity. Blood Cancer J 2021; 11:193. [PMID: 34864823 PMCID: PMC8643352 DOI: 10.1038/s41408-021-00584-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 02/07/2023] Open
Abstract
Blocked cellular differentiation is a central pathologic feature of the myeloid malignancies, myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML). Treatment regimens promoting differentiation have resulted in incredible cure rates in certain AML subtypes, such as acute promyelocytic leukemia. Over the past several years, we have seen many new therapies for MDS/AML enter clinical practice, including epigenetic therapies (e.g., 5-azacitidine), isocitrate dehydrogenase (IDH) inhibitors, fms-like kinase 3 (FLT3) inhibitors, and lenalidomide for deletion 5q (del5q) MDS. Despite not being developed with the intent of manipulating differentiation, induction of differentiation is a major mechanism by which several of these novel agents function. In this review, we examine the new therapeutic landscape for these diseases, focusing on the role of hematopoietic differentiation and the impact of inflammation and aging. We review how current therapies in MDS/AML promote differentiation as a part of their therapeutic effect, and the cellular mechanisms by which this occurs. We then outline potential novel avenues to achieve differentiation in the myeloid malignancies for therapeutic purposes. This emerging body of knowledge about the importance of relieving differentiation blockade with anti-neoplastic therapies is important to understand how current novel agents function and may open avenues to developing new treatments that explicitly target cellular differentiation. Moving beyond cytotoxic agents has the potential to open new and unexpected avenues in the treatment of myeloid malignancies, hopefully providing more efficacy with reduced toxicity.
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10
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Oncogene-induced senescence in hematopoietic progenitors features myeloid restricted hematopoiesis, chronic inflammation and histiocytosis. Nat Commun 2021; 12:4559. [PMID: 34315896 PMCID: PMC8316479 DOI: 10.1038/s41467-021-24876-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 07/12/2021] [Indexed: 12/28/2022] Open
Abstract
Activating mutations in the BRAF-MAPK pathway have been reported in histiocytoses, hematological inflammatory neoplasms characterized by multi-organ dissemination of pro-inflammatory myeloid cells. Here, we generate a humanized mouse model of transplantation of human hematopoietic stem and progenitor cells (HSPCs) expressing the activated form of BRAF (BRAFV600E). All mice transplanted with BRAFV600E-expressing HSPCs succumb to bone marrow failure, displaying myeloid-restricted hematopoiesis and multi-organ dissemination of aberrant mononuclear phagocytes. At the basis of this aggressive phenotype, we uncover the engagement of a senescence program, characterized by DNA damage response activation and a senescence-associated secretory phenotype, which affects also non-mutated bystander cells. Mechanistically, we identify TNFα as a key determinant of paracrine senescence and myeloid-restricted hematopoiesis and show that its inhibition dampens inflammation, delays disease onset and rescues hematopoietic defects in bystander cells. Our work establishes that senescence in the human hematopoietic system links oncogene-activation to the systemic inflammation observed in histiocytic neoplasms.
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11
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So EY, Sun C, Wu KQ, Dubielecka PM, Reginato AM, Liang OD. Inhibition of lipid phosphatase SHIP1 expands myeloid-derived suppressor cells and attenuates rheumatoid arthritis in mice. Am J Physiol Cell Physiol 2021; 321:C569-C584. [PMID: 34288720 DOI: 10.1152/ajpcell.00433.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Rheumatoid arthritis (RA) is a debilitating autoimmune disease of unknown cause, characterized by infiltration and accumulation of activated immune cells in the synovial joints where cartilage and bone destructions occur. Myeloid-derived suppressor cells (MDSCs) are of myeloid origin and are able to suppress T cell responses. Src homology 2 domain containing inositol polyphosphate 5-phosphatase 1 (SHIP1) was shown to be involved in the regulation of MDSC differentiation. The purpose of the present study was to investigate the effect of inhibition of SHIP1 on expansion of MDSCs in RA using a collagen-induced inflammatory arthritis (CIA) mouse model. In DBA/1 mice treatment with a small molecule specific SHIP1 inhibitor 3α-aminocholestane (3AC) induced a marked expansion of MDSCs in vivo. Both pre-treatment with 3AC of DBA/1 mice prior to CIA induction and intervention with 3AC during CIA progression significantly reduced disease incidence and severity. Adoptive transfer of MDSCs isolated from 3AC-treated mice, but not naïve MDSCs from normal mice, into CIA mice significantly reduced disease incidence and severity, indicating that the 3AC-induced MDSCs were the cellular mediators of the observed amelioration of the disease. In conclusion, inhibition of SHIP1 expands MDSCs in vivo and attenuates development of CIA in mice. Small molecule specific inhibition of SHIP1 may therefore offer therapeutic benefit to patients with RA and other autoimmune diseases.
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Affiliation(s)
- Eui-Young So
- Division of Hematology/Oncology, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States
| | - Changqi Sun
- Division of Rheumatology, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States
| | - Keith Q Wu
- Division of Hematology/Oncology, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States
| | - Patrycja M Dubielecka
- Division of Hematology/Oncology, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States
| | - Anthony M Reginato
- Division of Rheumatology, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States
| | - Olin D Liang
- Division of Hematology/Oncology, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States
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12
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COVID-19 is a systemic vascular hemopathy: insight for mechanistic and clinical aspects. Angiogenesis 2021; 24:755-788. [PMID: 34184164 PMCID: PMC8238037 DOI: 10.1007/s10456-021-09805-6] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 06/11/2021] [Indexed: 02/07/2023]
Abstract
Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is presenting as a systemic disease associated with vascular inflammation and endothelial injury. Severe forms of SARS-CoV-2 infection induce acute respiratory distress syndrome (ARDS) and there is still an ongoing debate on whether COVID-19 ARDS and its perfusion defect differs from ARDS induced by other causes. Beside pro-inflammatory cytokines (such as interleukin-1 β [IL-1β] or IL-6), several main pathological phenomena have been seen because of endothelial cell (EC) dysfunction: hypercoagulation reflected by fibrin degradation products called D-dimers, micro- and macrothrombosis and pathological angiogenesis. Direct endothelial infection by SARS-CoV-2 is not likely to occur and ACE-2 expression by EC is a matter of debate. Indeed, endothelial damage reported in severely ill patients with COVID-19 could be more likely secondary to infection of neighboring cells and/or a consequence of inflammation. Endotheliopathy could give rise to hypercoagulation by alteration in the levels of different factors such as von Willebrand factor. Other than thrombotic events, pathological angiogenesis is among the recent findings. Overexpression of different proangiogenic factors such as vascular endothelial growth factor (VEGF), basic fibroblast growth factor (FGF-2) or placental growth factors (PlGF) have been found in plasma or lung biopsies of COVID-19 patients. Finally, SARS-CoV-2 infection induces an emergency myelopoiesis associated to deregulated immunity and mobilization of endothelial progenitor cells, leading to features of acquired hematological malignancies or cardiovascular disease, which are discussed in this review. Altogether, this review will try to elucidate the pathophysiology of thrombotic complications, pathological angiogenesis and EC dysfunction, allowing better insight in new targets and antithrombotic protocols to better address vascular system dysfunction. Since treating SARS-CoV-2 infection and its potential long-term effects involves targeting the vascular compartment and/or mobilization of immature immune cells, we propose to define COVID-19 and its complications as a systemic vascular acquired hemopathy.
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13
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Caiado F, Pietras EM, Manz MG. Inflammation as a regulator of hematopoietic stem cell function in disease, aging, and clonal selection. J Exp Med 2021; 218:212381. [PMID: 34129016 PMCID: PMC8210622 DOI: 10.1084/jem.20201541] [Citation(s) in RCA: 99] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/19/2021] [Accepted: 05/19/2021] [Indexed: 12/17/2022] Open
Abstract
Inflammation is an evolutionarily selected defense response to infection or tissue damage that involves activation and consumption of immune cells in order to reestablish and maintain organismal integrity. In this process, hematopoietic stem cells (HSCs) are themselves exposed to inflammatory cues and via proliferation and differentiation, replace mature immune cells in a demand-adapted fashion. Here, we review how major sources of systemic inflammation act on and subsequently shape HSC fate and function. We highlight how lifelong inflammatory exposure contributes to HSC inflamm-aging and selection of premalignant HSC clones. Finally, we explore emerging areas of interest and open questions remaining in the field.
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Affiliation(s)
- Francisco Caiado
- Department of Medical Oncology and Hematology, University Hospital Zürich, Zürich, Switzerland.,University of Zürich, Comprehensive Cancer Center Zürich, Zürich, Switzerland
| | - Eric M Pietras
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Markus G Manz
- Department of Medical Oncology and Hematology, University Hospital Zürich, Zürich, Switzerland.,University of Zürich, Comprehensive Cancer Center Zürich, Zürich, Switzerland
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14
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Koivisto-Mørk AE, Svendsen IS, Skattebo Ø, Hallén J, Paulsen G. Impact of baseline serum ferritin and supplemental iron on altitude-induced hemoglobin mass response in elite athletes. Scand J Med Sci Sports 2021; 31:1764-1773. [PMID: 33908091 DOI: 10.1111/sms.13982] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 03/26/2021] [Accepted: 04/16/2021] [Indexed: 01/05/2023]
Abstract
The present study explored the impact of pre-altitude serum (s)-ferritin and iron supplementation on changes in hemoglobin mass (ΔHbmass) following altitude training. Measures of Hbmass and s-ferritin from 107 altitude sojourns (9-28 days at 1800-2500 m) with world-class endurance athletes (males n = 41, females n = 25) were analyzed together with iron supplementation and self-reported illness. Altitude sojourns with a hypoxic dose [median (range)] of 1169 (912) km·h increased Hbmass (mean ± SD) 36 ± 38 g (3.7 ± 3.7%, p < 0.001) and decreased s-ferritin -11 (190) µg·L-1 (p = 0.001). Iron supplements [27 (191) mg·day-1 ] were used at 45 sojourns (42%), while only 11 sojourns (10%) were commenced with s-ferritin <35 µg/L. Hbmass increased by 4.6 ± 3.7%, 3.4 ± 3.3%, 4.2 ± 4.3%, and 2.9 ± 3.4% with pre-altitude s-ferritin ≤35 µg·L-1 , 36-50 µg·L-1 , 51-100 µg·L-1 , and >100 µg·L-1 , respectively, with no group difference (p = 0.400). Hbmass increased by 4.1 ± 3.9%, 3.0 ± 3.0% and 3.7 ± 4.7% without, ≤50 mg·day-1 or >50 mg·day-1 supplemental iron, respectively (p = 0.399). Linear mixed model analysis revealed no interaction between pre-altitude s-ferritin and iron supplementation on ΔHbmass (p = 0.906). However, each 100 km·h increase in hypoxic dose augmented ΔHbmass by an additional 0.4% (95% CI: 0.1-0.7%; p = 0.012), while each 1 g·kg-1 higher pre-altitude Hbmass reduced ΔHbmass by -1% (-1.6 to -0.5; p < 0.001), and illness lowered ΔHbmass by -5.7% (-8.3 to -3.1%; p < 0.001). In conclusion, pre-altitude s-ferritin or iron supplementation were not related to the altitude-induced increase in Hbmass (3.7%) in world-class endurance athletes with clinically normal iron stores.
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Affiliation(s)
- Anu Elisa Koivisto-Mørk
- Norwegian Olympic Sports Centre, Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
| | - Ida Siobhan Svendsen
- Norwegian Olympic Sports Centre, Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
| | - Øyvind Skattebo
- Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
| | - Jostein Hallén
- Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
| | - Gøran Paulsen
- Norwegian Olympic Sports Centre, Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway.,Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
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15
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Bekkering S, Domínguez-Andrés J, Joosten LAB, Riksen NP, Netea MG. Trained Immunity: Reprogramming Innate Immunity in Health and Disease. Annu Rev Immunol 2021; 39:667-693. [PMID: 33637018 DOI: 10.1146/annurev-immunol-102119-073855] [Citation(s) in RCA: 121] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Traditionally, the innate and adaptive immune systems are differentiated by their specificity and memory capacity. In recent years, however, this paradigm has shifted: Cells of the innate immune system appear to be able to gain memory characteristics after transient stimulation, resulting in an enhanced response upon secondary challenge. This phenomenon has been called trained immunity. Trained immunity is characterized by nonspecific increased responsiveness, mediated via extensive metabolic and epigenetic reprogramming. Trained immunity explains the heterologous effects of vaccines, which result in increased protection against secondary infections. However, in chronic inflammatory conditions, trained immunity can induce maladaptive effects and contribute to hyperinflammation and progression of cardiovascular disease, autoinflammatory syndromes, and neuroinflammation. In this review we summarize the current state of the field of trained immunity, its mechanisms, and its roles in both health and disease.
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Affiliation(s)
- Siroon Bekkering
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands; , ,
| | - Jorge Domínguez-Andrés
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands; , ,
| | - Leo A B Joosten
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands; , , .,Department of Medical Genetics, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania;
| | - Niels P Riksen
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands; , ,
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands; , , .,Department of Genomics and Immunoregulation, Life and Medical Sciences Institute, University of Bonn, 53115 Bonn, Germany;
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16
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Impact of Exercise Intensity on Calprotectin Levels in Healthy Volunteers and Patients with Inflammatory Rheumatic Diseases. Life (Basel) 2021; 11:life11050377. [PMID: 33922149 PMCID: PMC8143494 DOI: 10.3390/life11050377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 11/16/2022] Open
Abstract
Exercise influences inflammatory response and immune system performance. The regular practice of a moderate activity positively regulates immunity and the inflammatory process, while intensive training depresses it and enhances inflammatory marker secretion. Calprotectin is involved in the inflammatory process, promoting neutrophil recruitment, cell degranulation, and inflammatory mediators. Furthermore, calprotectin has been associated with various inflammatory diseases, including inflammatory rheumatic diseases. The present review explores the effect of exercise on calprotectin levels in both healthy and inflammatory rheumatic conditions. Data show that the intensity duration and the type of exercise modulate calprotectin levels and participant inflammatory status. The exact role of calprotectin in the exercise response is yet unknown. Calprotectin could constitute an interesting biomarker for monitoring both the effect of exercise on the inflammatory process in healthy volunteers and the efficiency of exercise treatment programs in a patient with inflammatory rheumatic disease.
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17
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Iron control of erythroid microtubule cytoskeleton as a potential target in treatment of iron-restricted anemia. Nat Commun 2021; 12:1645. [PMID: 33712594 PMCID: PMC7955080 DOI: 10.1038/s41467-021-21938-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 02/20/2021] [Indexed: 12/17/2022] Open
Abstract
Anemias of chronic disease and inflammation (ACDI) result from restricted iron delivery to erythroid progenitors. The current studies reveal an organellar response in erythroid iron restriction consisting of disassembly of the microtubule cytoskeleton and associated Golgi disruption. Isocitrate supplementation, known to abrogate the erythroid iron restriction response, induces reassembly of microtubules and Golgi in iron deprived progenitors. Ferritin, based on proteomic profiles, regulation by iron and isocitrate, and putative interaction with microtubules, is assessed as a candidate mediator. Knockdown of ferritin heavy chain (FTH1) in iron replete progenitors induces microtubule collapse and erythropoietic blockade; conversely, enforced ferritin expression rescues erythroid differentiation under conditions of iron restriction. Fumarate, a known ferritin inducer, synergizes with isocitrate in reversing molecular and cellular defects of iron restriction and in oral remediation of murine anemia. These findings identify a cytoskeletal component of erythroid iron restriction and demonstrate potential for its therapeutic targeting in ACDI. Debilitating anemias in chronic diseases can result from deficient iron delivery to red cell precursors. Here, the authors show how this deficiency damages the cytoskeletal framework of progenitor cells and identify a targeted strategy for cytoskeletal repair, leading to anemia correction.
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18
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Geissler K, Jäger E, Barna A, Graf T, Graf E, Öhler L, Hoermann G, Valent P. Myelomonocytic skewing in chronic myelomonocytic leukemia: phenotypic, molecular and biologic features and impact on survival. Eur J Haematol 2021; 106:627-633. [PMID: 33432601 PMCID: PMC8554855 DOI: 10.1111/ejh.13577] [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: 09/18/2020] [Accepted: 01/07/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND Myelomonocytic skewing is considered as a key pathophysiologic phenomenon in chronic myelomonocytic leukemia (CMML), but its prevalence and potential correlation with phenotypic, genotypic, and clinical features are poorly defined. METHODS Skewed differentiation toward the myelomonocytic over erythroid commitment as indicated by an inverse ratio of myelomonocytic/erythroid colonies was investigated in 146 patients with CMML by semisolid in vitro cultures. RESULTS There was a high prevalence of myelomonocytic skewing in patients with CMML (120/146, 82%); whereas, this phenomenon was rare in normal individuals (1/98, 1%). Patients with CMML with myelomonocytic skewing had higher white blood cell and peripheral blast cell counts, and lower platelet values. The number of mutations in genes of the epigenetic and/or splicing category was higher in CMML patients with as compared with patients without skewing. Patients with myelomonocytic skewing had more frequently mutations in RASopathy genes and higher growth factor independent myeloid colony formation. Interestingly, the lack of myelomonocytic skewing discriminated patients with CMML with a particularly favorable prognosis (60 vs 19 months, P = .003) and a minimal risk of transformation. CONCLUSION Myelomonocytic skewing as determined by semisolid cultures can discriminate subgroups of patients with CMML with a different phenotype, a different genotype, and a different prognosis.
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Affiliation(s)
- Klaus Geissler
- Medical School, Sigmund Freud University, Vienna, Austria.,Department of Internal Medicine V with Hematology, Oncology and Palliative Medicine, Hospital Hietzing, Vienna, Austria
| | - Eva Jäger
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Agnes Barna
- Blood Transfusion Service, Blood Transfusion Service for Upper Austria, Austrian Red Cross, Linz, Austria
| | - Temeida Graf
- Department of Internal Medicine V with Hematology, Oncology and Palliative Medicine, Hospital Hietzing, Vienna, Austria
| | - Elmir Graf
- Department of Internal Medicine V with Hematology, Oncology and Palliative Medicine, Hospital Hietzing, Vienna, Austria
| | - Leopold Öhler
- Department of Internal Medicine/Oncology, St. Josef Hospital, Vienna, Austria
| | - Gregor Hoermann
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.,Central Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Innsbruck, Innsbruck, Austria.,Ludwig Boltzmann Institute for Hematology and Oncology (LBI HO), Medical University of Vienna, Vienna, Austria
| | - Peter Valent
- Ludwig Boltzmann Institute for Hematology and Oncology (LBI HO), Medical University of Vienna, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Vienna, Austria
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19
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Sioud M. Microbial sensing by haematopoietic stem and progenitor cells: Vigilance against infections and immune education of myeloid cells. Scand J Immunol 2020; 92:e12957. [PMID: 32767789 DOI: 10.1111/sji.12957] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/17/2020] [Accepted: 08/04/2020] [Indexed: 12/12/2022]
Abstract
Bone marrow haematopoietic stem and progenitor cells (HSPCs) express pattern recognition receptors such as Toll-like receptors (TLRs) to sense microbial products and activation of these innate immune receptors induces cytokine expression and redirects bone marrow haematopoiesis towards the increased production of myeloid cells. Secreted cytokines by HSPCs in response to TLR ligands can act in an autocrine or paracrine manner to regulate haematopoiesis. Moreover, tonic activation of HSPCs by microbiota-derived compounds might educate HSPCs to produce superior myeloid cells equipped with innate memory responses to combat pathogens. While haematopoietic stem cell activation through TLRs meets the increased demand for blood leucocytes to protect the host against infection, persistent exposure to inflammatory cytokines or microbial products might impair their function and even induce malignant transformation. This review highlights the potential outcomes of HSPCs in response to TLR ligands.
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Affiliation(s)
- Mouldy Sioud
- Department of Cancer Immunology, Oslo University Hospital-Radiumhospitalet, Montebello, Norway
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20
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Myelomonocytic Skewing In Vitro Discriminates Subgroups of Patients with Myelofibrosis with A Different Phenotype, A Different Mutational Profile and Different Prognosis. Cancers (Basel) 2020; 12:cancers12082291. [PMID: 32824053 PMCID: PMC7464756 DOI: 10.3390/cancers12082291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/06/2020] [Accepted: 08/13/2020] [Indexed: 11/25/2022] Open
Abstract
Normal hematopoietic function is maintained by a well-controlled balance of myelomonocytic, megaerythroid and lymphoid progenitor cell populations which may be skewed during pathologic conditions. Using semisolid in vitro cultures supporting the growth of myelomonocytic (CFU-GM) and erythroid (BFU-E) colonies, we investigated skewed differentiation towards the myelomonocytic over erythroid commitment in 81 patients with myelofibrosis (MF). MF patients had significantly increased numbers of circulating CFU-GM and BFU-E. Myelomonocytic skewing as indicated by a CFU-GM/BFU-E ratio ≥ 1 was found in 26/81 (32%) MF patients as compared to 1/98 (1%) in normal individuals. Patients with myelomonocytic skewing as compared to patients without skewing had higher white blood cell and blast cell counts, more frequent leukoerythroblastic features, but lower hemoglobin levels and platelet counts. The presence of myelomonocytic skewing was associated with a higher frequency of additional mutations, particularly in genes of the epigenetic and/or splicing machinery, and a significantly shorter survival (46 vs. 138 mo, p < 0.001). The results of this study show that the in vitro detection of myelomonocytic skewing can discriminate subgroups of patients with MF with a different phenotype, a different mutational profile and a different prognosis. Our findings may be important for the understanding and management of MF.
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21
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Paulson RF, Hariharan S, Little JA. Stress erythropoiesis: definitions and models for its study. Exp Hematol 2020; 89:43-54.e2. [PMID: 32750404 DOI: 10.1016/j.exphem.2020.07.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/28/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
Steady-state erythropoiesis generates new erythrocytes at a constant rate, and it has enormous productive capacity. This production is balanced by the removal of senescent erythrocytes by macrophages in the spleen and liver. Erythroid homeostasis is highly regulated to maintain sufficient erythrocytes for efficient oxygen delivery to the tissues, while avoiding viscosity problems associated with overproduction. However, there are times when this constant production of erythrocytes is inhibited or is inadequate; at these times, erythroid output is increased to compensate for the loss of production. In some cases, increased steady-state erythropoiesis can offset the loss of erythrocytes but, in response to inflammation caused by infection or tissue damage, steady-state erythropoiesis is inhibited. To maintain homeostasis under these conditions, an alternative stress erythropoiesis pathway is activated. Emerging data suggest that the bone morphogenetic protein 4 (BMP4)-dependent stress erythropoiesis pathway is integrated into the inflammatory response and generates a bolus of new erythrocytes that maintain homeostasis until steady-state erythropoiesis can resume. In this perspective, we define the mechanisms that generate new erythrocytes when steady-state erythropoiesis is impaired and discuss experimental models to study human stress erythropoiesis.
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Affiliation(s)
- Robert F Paulson
- Center for Molecular Immunology and Infectious Disease and the Department of Veterinary and Biomedical Sciences, Penn State University, University Park, PA; Intercollege Graduate Program in Genetics, Penn State University, University Park, PA.
| | - Sneha Hariharan
- Intercollege Graduate Program in Genetics, Penn State University, University Park, PA
| | - Jane A Little
- Department of Medicine, University of North Carolina Comprehensive Sickle Cell Disease Program, Chapel Hill, NC
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22
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Clinical, Hematologic, Biologic and Molecular Characteristics of Patients with Myeloproliferative Neoplasms and a Chronic Myelomonocytic Leukemia-Like Phenotype. Cancers (Basel) 2020; 12:cancers12071891. [PMID: 32674283 PMCID: PMC7409251 DOI: 10.3390/cancers12071891] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/07/2020] [Accepted: 07/12/2020] [Indexed: 11/17/2022] Open
Abstract
Patients with a myeloproliferative neoplasm (MPN) sometimes show a chronic myelomonocytic leukemia (CMML)-like phenotype but, according to the 2016 WHO classification, a documented history of an MPN excludes the diagnosis of CMML. Forty-one patients with an MPN (35 polycythemia vera (PV), 5 primary myelofibrosis, 1 essential thrombocythemia) and a CMML-like phenotype (MPN/CMML) were comprehensively characterized regarding clinical, hematologic, biologic and molecular features. The white blood cell counts in MPN/CMML patients were not different from CMML patients and PV patients. The hemoglobin values and platelet counts of these patients were higher than in CMML but lower than in PV, respectively. MPN/CMML patients showed myelomonocytic skewing, a typical in vitro feature of CMML but not of PV. The mutational landscape of MPN/CMML was not different from JAK2-mutated CMML. In two MPN/CMML patients, development of a CMML-like phenotype was associated with a decrease in the JAK2 V617F allelic burden. Finally, the prognosis of MPN/CMML (median overall survival (OS) 27 months) was more similar to CMML (JAK2-mutated, 28 months; JAK2-nonmutated 29 months) than to PV (186 months). In conclusion, we show that patients with MPN and a CMML-like phenotype share more characteristics with CMML than with PV, which may be relevant for their classification and clinical management.
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23
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Zhang X, Karatepe K, Chiewchengchol D, Zhu H, Guo R, Liu P, Yu H, Ren Q, Luo X, Cheng T, Ma F, Xu Y, Han M, Luo HR. Bacteria-Induced Acute Inflammation Does Not Reduce the Long-Term Reconstitution Capacity of Bone Marrow Hematopoietic Stem Cells. Front Immunol 2020; 11:626. [PMID: 32373117 PMCID: PMC7179742 DOI: 10.3389/fimmu.2020.00626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/19/2020] [Indexed: 12/04/2022] Open
Abstract
Pathogen-initiated chronic inflammation or autoimmune diseases accelerate proliferation and promote differentiation of hematopoietic stem cells (HSCs) but simultaneously reduce reconstitution capacity. Nevertheless, the effect of acute infection and inflammation on functional HSCs is still largely unknown. Here we found that acute infection elicited by heat-inactivated Escherichia coli (HIEC) expanded bone marrow lineage-negative (Lin)− stem-cell antigen 1 (Sca-1)+cKit+ (LSK) cell population, leading to reduced frequency of functional HSCs in LSK population. However, the total number of BM phenotypic HSCs (Flk2−CD48−CD150+ LSK cells) was not altered in HIEC-challenged mice. Additionally, the reconstitution capacity of the total BM between infected and uninfected mice was similar by both the competitive repopulation assay and measurement of functional HSCs by limiting dilution. Thus, occasionally occurring acute inflammation, which is critical for host defenses, is unlikely to affect HSC self-renewal and maintenance of long-term reconstitution capacity. During acute bacterial infection and inflammation, the hematopoietic system can replenish hematopoietic cells consumed in the innate inflammatory response by accelerating hematopoietic stem and progenitor cell proliferation, but preserving functional HSCs in the BM.
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Affiliation(s)
- Xiaoyu Zhang
- Department of Pathology, Harvard Stem Cell Institute (HSCI), Harvard Medical School, Boston, MA, United States.,Department of Lab Medicine, The Stem Cell Program, Children's Hospital Boston, Boston, MA, United States.,Dana-Farber/Harvard Cancer Center, Boston, MA, United States.,The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Kutay Karatepe
- Department of Pathology, Harvard Stem Cell Institute (HSCI), Harvard Medical School, Boston, MA, United States.,Department of Lab Medicine, The Stem Cell Program, Children's Hospital Boston, Boston, MA, United States.,Dana-Farber/Harvard Cancer Center, Boston, MA, United States
| | - Direkrit Chiewchengchol
- Department of Pathology, Harvard Stem Cell Institute (HSCI), Harvard Medical School, Boston, MA, United States.,Department of Lab Medicine, The Stem Cell Program, Children's Hospital Boston, Boston, MA, United States.,Dana-Farber/Harvard Cancer Center, Boston, MA, United States
| | - Haiyan Zhu
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Rongxia Guo
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Peng Liu
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Hongbo Yu
- Department of Pathology and Laboratory Medicine, VA Boston Healthcare System, West Roxbury, MA, United States
| | - Qian Ren
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Xiao Luo
- Department of Pathology, Harvard Stem Cell Institute (HSCI), Harvard Medical School, Boston, MA, United States.,Department of Lab Medicine, The Stem Cell Program, Children's Hospital Boston, Boston, MA, United States.,Dana-Farber/Harvard Cancer Center, Boston, MA, United States
| | - Tao Cheng
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Fengxia Ma
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Yuanfu Xu
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Mingzhe Han
- Department of Hematopoietic Stem Cell Transplantation, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Hongbo R Luo
- Department of Pathology, Harvard Stem Cell Institute (HSCI), Harvard Medical School, Boston, MA, United States.,Department of Lab Medicine, The Stem Cell Program, Children's Hospital Boston, Boston, MA, United States.,Dana-Farber/Harvard Cancer Center, Boston, MA, United States
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24
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L. Salem M, A. Abdul B E, A. Zidan AA, M. Elghara R. Stem Cell Mobilization with G-CSF and Cyclophosphamide Ameliorated Collagen-Induced Arthritis in Wistar Rats. INT J PHARMACOL 2020. [DOI: 10.3923/ijp.2020.223.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Stress Erythropoiesis is a Key Inflammatory Response. Cells 2020; 9:cells9030634. [PMID: 32155728 PMCID: PMC7140438 DOI: 10.3390/cells9030634] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 02/27/2020] [Accepted: 03/03/2020] [Indexed: 12/21/2022] Open
Abstract
Bone marrow medullary erythropoiesis is primarily homeostatic. It produces new erythrocytes at a constant rate, which is balanced by the turnover of senescent erythrocytes by macrophages in the spleen. Despite the enormous capacity of the bone marrow to produce erythrocytes, there are times when it is unable to keep pace with erythroid demand. At these times stress erythropoiesis predominates. Stress erythropoiesis generates a large bolus of new erythrocytes to maintain homeostasis until steady state erythropoiesis can resume. In this review, we outline the mechanistic differences between stress erythropoiesis and steady state erythropoiesis and show that their responses to inflammation are complementary. We propose a new hypothesis that stress erythropoiesis is induced by inflammation and plays a key role in maintaining erythroid homeostasis during inflammatory responses.
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26
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Grigoriou M, Banos A, Filia A, Pavlidis P, Giannouli S, Karali V, Nikolopoulos D, Pieta A, Bertsias G, Verginis P, Mitroulis I, Boumpas DT. Transcriptome reprogramming and myeloid skewing in haematopoietic stem and progenitor cells in systemic lupus erythematosus. Ann Rheum Dis 2019; 79:242-253. [PMID: 31780527 PMCID: PMC7025734 DOI: 10.1136/annrheumdis-2019-215782] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 09/30/2019] [Accepted: 10/18/2019] [Indexed: 12/13/2022]
Abstract
Objectives Haematopoietic stem and progenitor cells (HSPCs) are multipotent cells giving rise to both myeloid and lymphoid cell lineages. We reasoned that the aberrancies of immune cells in systemic lupus erythematosus (SLE) could be traced back to HSPCs. Methods A global gene expression map of bone marrow (BM)-derived HSPCs was completed by RNA sequencing followed by pathway and enrichment analysis. The cell cycle status and apoptosis status of HSPCs were assessed by flow cytometry, while DNA damage was assessed via immunofluorescence. Results Transcriptomic analysis of Lin−Sca-1+c-Kit+ haematopoietic progenitors from diseased lupus mice demonstrated a strong myeloid signature with expanded frequencies of common myeloid progenitors (CMPs)—but not of common lymphoid progenitors—reminiscent of a ‘trained immunity’ signature. CMP profiling revealed an intense transcriptome reprogramming with suppression of granulocytic regulators indicative of a differentiation arrest with downregulation trend of major regulators such as Cebpe, Cebpd and Csf3r, and disturbed myelopoiesis. Despite the differentiation arrest, frequencies of BM neutrophils were markedly increased in diseased mice, suggesting an alternative granulopoiesis pathway. In patients with SLE with severe disease, haematopoietic progenitor cells (CD34+) demonstrated enhanced proliferation, cell differentiation and transcriptional activation of cytokines and chemokines that drive differentiation towards myelopoiesis, thus mirroring the murine data. Conclusions Aberrancies of immune cells in SLE can be traced back to the BM HSPCs. Priming of HSPCs and aberrant regulation of myelopoiesis may contribute to inflammation and risk of flare. Trial registration number 4948/19-07-2016.
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Affiliation(s)
- Maria Grigoriou
- 4th Department of Internal Medicine, Attikon University Hospital and Joint Rheumatology Program, National and Kapodestrian University of Athens, Athens, Greece.,Laboratory of Inflammation and Autoimmunity, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Aggelos Banos
- Laboratory of Inflammation and Autoimmunity, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Anastasia Filia
- Laboratory of Inflammation and Autoimmunity, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Pavlos Pavlidis
- Institute of Computer Science, Foundation of Research and Technology Hellas, Heraklion, Greece
| | - Stavroula Giannouli
- 2nd Department of Internal Medicine, Hippokrateion Hospital, National and Kapodestrian University of Athens, Athens, Greece
| | - Vassiliki Karali
- 4th Department of Internal Medicine, Attikon University Hospital and Joint Rheumatology Program, National and Kapodestrian University of Athens, Athens, Greece
| | - Dionysis Nikolopoulos
- 4th Department of Internal Medicine, Attikon University Hospital and Joint Rheumatology Program, National and Kapodestrian University of Athens, Athens, Greece.,Laboratory of Inflammation and Autoimmunity, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Antigone Pieta
- 4th Department of Internal Medicine, Attikon University Hospital and Joint Rheumatology Program, National and Kapodestrian University of Athens, Athens, Greece
| | - George Bertsias
- Department of Rheumatology, Clinical Immunology and Allergy, School of Medicine, University of Crete, Heraklion, Greece
| | - Panayotis Verginis
- Laboratory of Immune Regulation and Tolerance, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Ioannis Mitroulis
- Department of Hematology and Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece.,Institute for Clinical Chemistry and Laboratory Medicine, Center of Internal Medicine, University Hospital of Dresden, Dresden, Germany
| | - Dimitrios T Boumpas
- 4th Department of Internal Medicine, Attikon University Hospital and Joint Rheumatology Program, National and Kapodestrian University of Athens, Athens, Greece .,Laboratory of Inflammation and Autoimmunity, Biomedical Research Foundation, Academy of Athens, Athens, Greece.,Rheumatology-Clinical Immunology Unit, Medical School, University of Cyprus, Nicosia, Cyprus
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27
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Cesaro A, Defrêne J, Lachhab A, Pagé N, Tardif MR, Al-Shami A, Oravecz T, Fortin PR, Daudelin JF, Labrecque N, Aoudjit F, Pelletier M, Tessier PA. Enhanced myelopoiesis and aggravated arthritis in S100a8-deficient mice. PLoS One 2019; 14:e0221528. [PMID: 31437241 PMCID: PMC6705798 DOI: 10.1371/journal.pone.0221528] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 08/08/2019] [Indexed: 12/29/2022] Open
Abstract
Expressed strongly by myeloid cells, damage-associated molecular pattern (DAMP) proteins S100A8 and S100A9 are found in the serum of patients with infectious and autoimmune diseases. Compared to S100A9, the role of S100A8 is controversial. We investigated its biological activity in collagen-induced arthritis using the first known viable and fertile S100a8-deficient (S100a8-/-) mouse. Although comparable to the wild type (WT) in terms of lymphocyte distribution in blood and in the primary and secondary lymphoid organs, S100a8-/- mice had increased numbers of neutrophils, monocytes and dendritic cells in the blood and bone marrow, and these all expressed myeloid markers such as CD11b, Ly6G and CD86 more strongly. Granulocyte-macrophage common precursors were increased in S100a8-/- bone marrow and yielded greater numbers of macrophages and dendritic cells in culture. The animals also developed more severe arthritic disease leading to aggravated osteoclast activity and bone destruction. These findings were correlated with increased inflammatory cell infiltration and cytokine secretion in the paws. This study suggests that S100A8 is an anti-inflammatory DAMP that regulates myeloid cell differentiation, thereby mitigating the development of experimental arthritis.
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Affiliation(s)
- Annabelle Cesaro
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Joan Defrêne
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Asmaa Lachhab
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Nathalie Pagé
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Mélanie R. Tardif
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Amin Al-Shami
- Lexicon Pharmaceuticals, Inc., The Woodlands, Texas, United States of America
| | - Tamas Oravecz
- Lexicon Pharmaceuticals, Inc., The Woodlands, Texas, United States of America
| | - Paul R. Fortin
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | | | - Nathalie Labrecque
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada
- Department of Medicine and Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montréal, Canada
| | - Fawzi Aoudjit
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | - Martin Pelletier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | - Philippe A. Tessier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
- * E-mail:
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28
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Frangou E, Vassilopoulos D, Boletis J, Boumpas DT. An emerging role of neutrophils and NETosis in chronic inflammation and fibrosis in systemic lupus erythematosus (SLE) and ANCA-associated vasculitides (AAV): Implications for the pathogenesis and treatment. Autoimmun Rev 2019; 18:751-760. [DOI: 10.1016/j.autrev.2019.06.011] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 02/02/2019] [Indexed: 02/08/2023]
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29
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Pioli PD, Casero D, Montecino-Rodriguez E, Morrison SL, Dorshkind K. Plasma Cells Are Obligate Effectors of Enhanced Myelopoiesis in Aging Bone Marrow. Immunity 2019; 51:351-366.e6. [PMID: 31303400 DOI: 10.1016/j.immuni.2019.06.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 04/10/2019] [Accepted: 06/12/2019] [Indexed: 12/25/2022]
Abstract
Aging results in increased myelopoiesis, which is linked to the increased incidence of myeloid leukemias and production of myeloid-derived suppressor cells. Here, we examined the contribution of plasma cells (PCs) to age-related increases in myelopoiesis, as PCs exhibit immune regulatory function and sequester in bone marrow (BM). PC number was increased in old BM, and they exhibited high expression of genes encoding inflammatory cytokines and pathogen sensors. Antibody-mediated depletion of PCs from old mice reduced the number of myeloid-biased hematopoietic stem cells and mature myeloid cells to levels in young animals, but lymphopoiesis was not rejuvenated, indicating that redundant mechanisms inhibit that process. PCs also regulated the production of inflammatory factors from BM stromal cells, and disruption of the PC-stromal cell circuitry with inhibitors of the cytokines IL-1 and TNF-α attenuated myelopoiesis in old mice. Thus, the age-related increase in myelopoiesis is driven by an inflammatory network orchestrated by PCs.
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Affiliation(s)
- Peter D Pioli
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - David Casero
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | | | - Sherie L Morrison
- Department of Microbiology, Immunology and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Kenneth Dorshkind
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.
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30
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Rodriguez RM, Suarez-Alvarez B, Lopez-Larrea C. Therapeutic Epigenetic Reprogramming of Trained Immunity in Myeloid Cells. Trends Immunol 2019; 40:66-80. [PMID: 30595189 DOI: 10.1016/j.it.2018.11.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 10/31/2018] [Accepted: 11/08/2018] [Indexed: 12/20/2022]
Abstract
Infiltrating and tissue-resident myeloid cells are essential regulators of innate and adaptive immunity. During inflammation, and in response to microbial products, these cells can adapt to microenvironmental conditions and acquire specialized functions, including phagocytosis and the production of proinflammatory cytokines. Such myeloid plasticity is driven, in part, by epigenetic dynamics that can sustain stable phenotypes after activation, and which may lead to maladaptive cell polarization states associated with inflammation and autoimmunity. Here, we review recent reports describing epigenetic mechanisms linked to such polarization states and innate immune memory (tolerance and training) in monocyte and macrophage lineages. We discuss how these mechanisms might be targeted to develop putative immunomodulatory tools that might be used to treat a variety of immune-mediated diseases.
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Affiliation(s)
- R M Rodriguez
- Translational Immunology Laboratory, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Hospital Universitario Central de Asturias, 33011 Oviedo, Spain
| | - B Suarez-Alvarez
- Translational Immunology Laboratory, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Hospital Universitario Central de Asturias, 33011 Oviedo, Spain.
| | - C Lopez-Larrea
- Translational Immunology Laboratory, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Hospital Universitario Central de Asturias, 33011 Oviedo, Spain; Immunology Department, Hospital Universitario Central de Asturias, 33011 Oviedo, Spain.
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31
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Hernandez G, Mills TS, Rabe JL, Chavez JS, Kuldanek S, Kirkpatrick G, Noetzli L, Jubair WK, Zanche M, Myers JR, Stevens BM, Fleenor CJ, Adane B, Dinarello CA, Ashton J, Jordan CT, Di Paola J, Hagman JR, Holers VM, Kuhn KA, Pietras EM. Pro-inflammatory cytokine blockade attenuates myeloid expansion in a murine model of rheumatoid arthritis. Haematologica 2019; 105:585-597. [PMID: 31101752 PMCID: PMC7049366 DOI: 10.3324/haematol.2018.197210] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 04/17/2019] [Indexed: 12/16/2022] Open
Abstract
Rheumatoid arthritis (RA) is a debilitating autoimmune disease characterized by chronic inflammation and progressive destruction of joint tissue. It is also characterized by aberrant blood phenotypes including anemia and suppressed lymphopoiesis that contribute to morbidity in RA patients. However, the impact of RA on hematopoietic stem cells (HSC) has not been fully elucidated. Using a collagen-induced mouse model of human RA, we identified systemic inflammation and myeloid overproduction associated with activation of a myeloid differentiation gene program in HSC. Surprisingly, despite ongoing inflammation, HSC from arthritic mice remain in a quiescent state associated with activation of a proliferation arrest gene program. Strikingly, we found that inflammatory cytokine blockade using the interleukin-1 receptor antagonist anakinra led to an attenuation of inflammatory arthritis and myeloid expansion in the bone marrow of arthritic mice. In addition, anakinra reduced expression of inflammation-driven myeloid lineage and proliferation arrest gene programs in HSC of arthritic mice. Altogether, our findings show that inflammatory cytokine blockade can contribute to normalization of hematopoiesis in the context of chronic autoimmune arthritis.
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Affiliation(s)
- Giovanny Hernandez
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Taylor S Mills
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Jennifer L Rabe
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - James S Chavez
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Susan Kuldanek
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Gregory Kirkpatrick
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Leila Noetzli
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Widian K Jubair
- Division of Rheumatology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Michelle Zanche
- Genomics Research Center, University of Rochester, Rochester, NY
| | - Jason R Myers
- Genomics Research Center, University of Rochester, Rochester, NY
| | - Brett M Stevens
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Courtney J Fleenor
- Department of Biomedical Research, National Jewish Health, Denver, CO.,Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Biniam Adane
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Charles A Dinarello
- Division of Infectious Disease, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - John Ashton
- Genomics Research Center, University of Rochester, Rochester, NY
| | - Craig T Jordan
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Jorge Di Paola
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - James R Hagman
- Department of Biomedical Research, National Jewish Health, Denver, CO.,Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - V Michael Holers
- Division of Rheumatology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Kristine A Kuhn
- Division of Rheumatology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Eric M Pietras
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO .,Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO
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32
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Micewicz ED, Iwamoto KS, Ratikan JA, Nguyen C, Xie MW, Cheng G, Boxx GM, Deriu E, Damoiseaux RD, Whitelegge JP, Ruchala PP, Avetisyan R, Jung ME, Lawson G, Nemeth E, Ganz T, Sayre JW, McBride WH, Schaue D. The Aftermath of Surviving Acute Radiation Hematopoietic Syndrome and its Mitigation. Radiat Res 2019; 191:323-334. [PMID: 30730284 DOI: 10.1667/rr15231.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Intensive research is underway to find new agents that can successfully mitigate the acute effects of radiation exposure. This is primarily in response to potential counterthreats of radiological terrorism and nuclear accidents but there is some hope that they might also be of value for cancer patients treated with radiation therapy. Research into mitigation countermeasures typically employs classic animal models of acute radiation syndromes (ARS) that develop after whole-body irradiation (WBI). While agents are available that successfully mitigate ARS when given after radiation exposure, their success raises questions as to whether they simply delay lethality or unmask potentially lethal radiation pathologies that may appear later in time. Life shortening is a well-known consequence of WBI in humans and experimental animals, but it is not often examined in a mitigation setting and its causes, other than cancer, are not well-defined. This is in large part because delayed effects of acute radiation exposure (DEARE) do not follow the strict time-dose phenomena associated with ARS and present as a diverse range of symptoms and pathologies with low mortality rates that can be evaluated only with the use of large cohorts of subjects, as in this study. Here, we describe chronically increased mortality rates up to 660 days in large numbers of mice given LD70/30 doses of WBI. Systemic myeloid cell activation after WBI persists in some mice and is associated with late immunophenotypic changes and hematopoietic imbalance. Histopathological changes are largely of a chronic inflammatory nature and variable incidence, as are the clinical symptoms, including late diarrhea that correlates temporally with changes in the content of the microbiome. We also describe the acute and long-term consequences of mitigating hematopoietic ARS (H-ARS) lethality after LD70/30 doses of WBI in multiple cohorts of mice treated uniformly with radiation mitigators that have a common 4-nitro-phenylsulfonamide (NPS) pharmacophore. Effective NPS mitigators dramatically decrease ARS mortality. There is slightly increased subacute mortality, but the rate of late mortalities is slowed, allowing some mice to live a normal life span, which is not the case for WBI controls. The study has broad relevance to radiation late effects and their potential mitigation and epitomizes the complex interaction between radiation-damaged tissues and immune homeostasis.
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Affiliation(s)
- Ewa D Micewicz
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
| | - Keisuke S Iwamoto
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
| | - Josephine A Ratikan
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
| | - Christine Nguyen
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
| | - Michael W Xie
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
| | - Genhong Cheng
- b Department of Microbiology, Immunology and Molecular Genetics, University of California at Los Angeles, Los Angeles, California
| | - Gayle M Boxx
- b Department of Microbiology, Immunology and Molecular Genetics, University of California at Los Angeles, Los Angeles, California
| | - Elisa Deriu
- b Department of Microbiology, Immunology and Molecular Genetics, University of California at Los Angeles, Los Angeles, California
| | - Robert D Damoiseaux
- g Molecular Screening Shared Resource, University of California at Los Angeles, Los Angeles, California
| | - Julian P Whitelegge
- h Pasarow Mass Spectrometry Laboratory, University of California at Los Angeles, Los Angeles, California
| | - Piotr P Ruchala
- h Pasarow Mass Spectrometry Laboratory, University of California at Los Angeles, Los Angeles, California
| | - Rozeta Avetisyan
- c Department of Anesthesiology, University of California at Los Angeles, Los Angeles, California
| | - Michael E Jung
- d Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California
| | - Greg Lawson
- e Department of Laboratory Animal Medicine, University of California at Los Angeles, Los Angeles, California
| | - Elizabeta Nemeth
- f Department of Medicine, University of California at Los Angeles, Los Angeles, California
| | - Tomas Ganz
- f Department of Medicine, University of California at Los Angeles, Los Angeles, California
| | - James W Sayre
- i School of Public Health, Biostatistics and Radiology, University of California at Los Angeles, Los Angeles, California
| | - William H McBride
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
| | - Dörthe Schaue
- a Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, California
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33
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Zhang LJ, Yan C, Schouteden S, Ma XJ, Zhao D, Peters T, Verfaillie CM, Feng YM. The Impact of Integrin β2 on Granulocyte/Macrophage Progenitor Proliferation. Stem Cells 2018; 37:430-440. [PMID: 30537419 PMCID: PMC6849781 DOI: 10.1002/stem.2961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/30/2018] [Accepted: 11/06/2018] [Indexed: 12/20/2022]
Abstract
Previously, we reported that although the HSPC frequency in bone marrow cells (BMC) was comparable between β2-/- and β2+/+ mice, transplantation of β2-/- BMC into lethally irradiated CD45.1 recipient resulted in more myeloid cell production than β2+/+ BMC. The objective of this study is to address if integrin β2 deficiency skews granulocyte/macrophage progenitor (GMP) proliferation. FACS analysis demonstrated that GMP frequency and cell number were higher and megakaryocyte/erythrocyte progenitor frequency and cell number were lower in β2-/- mice than β2+/+ mice. However, the common myeloid progenitors (CMP) frequency and cell number were similar between the two groups. The increased GMP number was due to GMP proliferation as evidenced by the percentage of BrdU-incorporating GMP. Whole genome transcriptome analysis identified increased FcεRIα expression in β2-/- CMP compared to β2+/+ CMP. FcεRIα expression on β2-/- GMP was detected increased in β2-/- mice by qRT-PCR and FACS. Although transplantation of FcεRIαhi GMP or FcεRIαlo GMP into lethally irradiated CD45.1 recipient resulted in comparable myeloid cell production, transplantation of β2 deficient FcεRIαhi GMP generated more myeloid cells than β2+/+ FcεRIαhi GMP. GATA2 expression was increased in β2-/- GMP. Using a luciferase reporter assay, we demonstrated that mutation of the GATA2 binding site in the FcεRIα promoter region diminished FcεRIα transcription. In vitro, the addition of IgE, the ligand of FcεRIα, promoted GMP expansion, which was abrogated by inhibition of JNK phosphorylation. Integrin β2 deficiency promoted GMP proliferation and myeloid cell production, which was mediated via FcεRIα/IgE-induced JNK phosphorylation in GMP. Stem Cells 2019;37:430-440.
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Affiliation(s)
- Li-Jie Zhang
- Beijing Key Laboratory of Diabetes Prevention and Research, Endocrinology Center, Beijing Luhe hospital, Capital Medical University, Beijing, People's Republic of China
| | - Cen Yan
- Beijing Key Laboratory of Diabetes Prevention and Research, Endocrinology Center, Beijing Luhe hospital, Capital Medical University, Beijing, People's Republic of China
| | - Sarah Schouteden
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven, Leuven, Belgium
| | - Xiao-Juan Ma
- Beijing Key Laboratory of Diabetes Prevention and Research, Endocrinology Center, Beijing Luhe hospital, Capital Medical University, Beijing, People's Republic of China
| | - Dong Zhao
- Beijing Key Laboratory of Diabetes Prevention and Research, Endocrinology Center, Beijing Luhe hospital, Capital Medical University, Beijing, People's Republic of China
| | - Thorsten Peters
- Department of Dermatology and Allergic Diseases, Ulm University, Ulm, Germany
| | - Catherine M Verfaillie
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven, Leuven, Belgium
| | - Ying-Mei Feng
- Beijing Key Laboratory of Diabetes Prevention and Research, Endocrinology Center, Beijing Luhe hospital, Capital Medical University, Beijing, People's Republic of China.,Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven, Leuven, Belgium
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34
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Chronic immune response dysregulation in MDS pathogenesis. Blood 2018; 132:1553-1560. [PMID: 30104218 DOI: 10.1182/blood-2018-03-784116] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/03/2018] [Indexed: 12/18/2022] Open
Abstract
Chronic innate immune signaling in hematopoietic cells is widely described in myelodysplastic syndromes (MDS), and innate immune pathway activation, predominantly via pattern recognition receptors, increases the risk of developing MDS. An inflammatory component to MDS has been reported for many years, but only recently has evidence supported a more direct role of chronic innate immune signaling and associated inflammatory pathways in the pathogenesis of MDS. Here we review recent findings and discuss relevant questions related to chronic immune response dysregulation in MDS.
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35
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Chistiakov DA, Grechko AV, Myasoedova VA, Melnichenko AA, Orekhov AN. The role of monocytosis and neutrophilia in atherosclerosis. J Cell Mol Med 2018; 22:1366-1382. [PMID: 29364567 PMCID: PMC5824421 DOI: 10.1111/jcmm.13462] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 10/09/2017] [Indexed: 12/12/2022] Open
Abstract
Monocytosis and neutrophilia are frequent events in atherosclerosis. These phenomena arise from the increased proliferation of hematopoietic stem and multipotential progenitor cells (HSPCs) and HSPC mobilization from the bone marrow to other immune organs and circulation. High cholesterol and inflammatory signals promote HSPC proliferation and preferential differentiation to the myeloid precursors (i.e., myelopoiesis) that than give rise to pro-inflammatory immune cells. These cells accumulate in the plaques thereby enhancing vascular inflammation and contributing to further lesion progression. Studies in animal models of atherosclerosis showed that manipulation with HSPC proliferation and differentiation through the activation of LXR-dependent mechanisms and restoration of cholesterol efflux may have a significant therapeutic potential.
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MESH Headings
- Animals
- Atherosclerosis/genetics
- Atherosclerosis/immunology
- Atherosclerosis/pathology
- Bone Marrow/immunology
- Bone Marrow/pathology
- Cell Differentiation
- Cell Proliferation
- Cholesterol/immunology
- Disease Models, Animal
- Gene Expression Regulation
- Hematopoietic Stem Cells/immunology
- Hematopoietic Stem Cells/pathology
- Humans
- Hypercholesterolemia/genetics
- Hypercholesterolemia/immunology
- Hypercholesterolemia/pathology
- Liver X Receptors/genetics
- Liver X Receptors/immunology
- Mice
- Monocytes/immunology
- Monocytes/pathology
- Multipotent Stem Cells/immunology
- Multipotent Stem Cells/pathology
- Neutrophils/immunology
- Neutrophils/pathology
- Nuclear Receptor Subfamily 4, Group A, Member 1/deficiency
- Nuclear Receptor Subfamily 4, Group A, Member 1/genetics
- Nuclear Receptor Subfamily 4, Group A, Member 1/immunology
- Plaque, Atherosclerotic/genetics
- Plaque, Atherosclerotic/immunology
- Plaque, Atherosclerotic/pathology
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Affiliation(s)
- Dimitry A. Chistiakov
- Department of NeurochemistryDivision of Basic and Applied NeurobiologySerbsky Federal Medical Research Center of Psychiatry and NarcologyMoscowRussia
| | - Andrey V. Grechko
- Federal Scientific Clinical Center for Resuscitation and RehabilitationMoscowRussia
| | - Veronika A. Myasoedova
- Skolkovo Innovative CenterInstitute for Atherosclerosis ResearchMoscowRussia
- Laboratory of AngiopathologyInstitute of General Pathology and PathophysiologyRussian Academy of SciencesMoscowRussia
| | - Alexandra A. Melnichenko
- Skolkovo Innovative CenterInstitute for Atherosclerosis ResearchMoscowRussia
- Laboratory of AngiopathologyInstitute of General Pathology and PathophysiologyRussian Academy of SciencesMoscowRussia
| | - Alexander N. Orekhov
- Skolkovo Innovative CenterInstitute for Atherosclerosis ResearchMoscowRussia
- Laboratory of AngiopathologyInstitute of General Pathology and PathophysiologyRussian Academy of SciencesMoscowRussia
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36
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Muschter D, Göttl C, Vogel M, Grifka J, Straub RH, Grässel S. Reactivity of rat bone marrow-derived macrophages to neurotransmitter stimulation in the context of collagen II-induced arthritis. Arthritis Res Ther 2015; 17:169. [PMID: 26104678 PMCID: PMC4496866 DOI: 10.1186/s13075-015-0684-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 06/12/2015] [Indexed: 12/29/2022] Open
Abstract
Introduction Numerous observations indicate that rheumatoid arthritis (RA) has a bone marrow component. In parallel, local synovial changes depend on neuronal components of the peripheral sympathetic nervous system. Here, we wanted to analyze whether collagen II-induced arthritis (CIA) has an impact on number, adhesion, apoptosis, and proliferation of the macrophage subset of bone marrow cells and how alterations in neurotransmitter microenvironment affect these properties. Methods Bone marrow-derived macrophages (BMMs) were isolated from Dark Agouti rats at different stages of CIA, and number, adhesion, caspase 3/7 activity, and proliferation were analyzed in the presence of acetylcholine (ACh), noradrenaline (NA), and vasoactive intestinal peptide (VIP). Results Opposed to enhanced CD11b+ (cluster of differentiation 11b-positive) and EMR1+ (epidermal growth factor-like module-containing mucin-like hormone receptor-like 1-positive) cells, characterizing the macrophage subset, in native bone marrow of rats with acute inflammatory arthritis, we found decreased numbers of CIA macrophages after enrichment and culture in comparison with healthy (control) animals. Adhesion studies revealed significantly reduced attachment to plastic in acute arthritis and collagen type I and fibronectin in chronic arthritis. Additionally, we found a strong reduction in proliferation of BMMs at CIA onset and in the chronic phase of CIA. Apoptosis remained unaffected. Neurotransmitter stimulation profoundly affected proliferation, adhesion, and apoptosis of BMMs from CIA and control rats, depending on disease time point. Cultured BMMs from CIA and control animals expressed neurotransmitter receptors for ACh, VIP and NA, but the expression profile seemed not to be affected by CIA. Conclusions Induction of CIA distinctly inhibits proliferation of BMMs in low- and non-inflammatory phases and reduces attachment to plastic at the acute inflammatory arthritis stage and adhesion to collagen I and fibronectin at the chronic stage. Influence of neurotransmitter stimulation on adhesion, apoptosis, and proliferation is altered by CIA depending on disease stage. We suggest an altered reactivity of BMMs to neurotransmitter stimulation caused by CIA and maybe also by aging. Electronic supplementary material The online version of this article (doi:10.1186/s13075-015-0684-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dominique Muschter
- Experimental Orthopedics, Centre for Medical Biotechnology, Biopark I, University of Regensburg, Josef-Engert-Str. 9, 93053, Regensburg, Germany. .,Department of Orthopedic Surgery, University of Regensburg, Kaiser-Karl V-Allee 3, 93077, Bad Abbach, Germany.
| | - Claudia Göttl
- Experimental Orthopedics, Centre for Medical Biotechnology, Biopark I, University of Regensburg, Josef-Engert-Str. 9, 93053, Regensburg, Germany. .,Department of Orthopedic Surgery, University of Regensburg, Kaiser-Karl V-Allee 3, 93077, Bad Abbach, Germany.
| | - Mandy Vogel
- Experimental Orthopedics, Centre for Medical Biotechnology, Biopark I, University of Regensburg, Josef-Engert-Str. 9, 93053, Regensburg, Germany. .,Department of Orthopedic Surgery, University of Regensburg, Kaiser-Karl V-Allee 3, 93077, Bad Abbach, Germany.
| | - Joachim Grifka
- Department of Orthopedic Surgery, University of Regensburg, Kaiser-Karl V-Allee 3, 93077, Bad Abbach, Germany.
| | - Rainer H Straub
- Laboratory of Experimental Rheumatology and Neuroendocrine Immunology, Department of Internal Medicine I, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
| | - Susanne Grässel
- Experimental Orthopedics, Centre for Medical Biotechnology, Biopark I, University of Regensburg, Josef-Engert-Str. 9, 93053, Regensburg, Germany. .,Department of Orthopedic Surgery, University of Regensburg, Kaiser-Karl V-Allee 3, 93077, Bad Abbach, Germany.
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MacIsaac KD, Baumgartner R, Kang J, Loboda A, Peterfy C, DiCarlo J, Riek J, Beals C. Pre-treatment whole blood gene expression is associated with 14-week response assessed by dynamic contrast enhanced magnetic resonance imaging in infliximab-treated rheumatoid arthritis patients. PLoS One 2014; 9:e113937. [PMID: 25504080 PMCID: PMC4264695 DOI: 10.1371/journal.pone.0113937] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 10/28/2014] [Indexed: 11/20/2022] Open
Abstract
Approximately 30% of rheumatoid arthritis patients achieve inadequate response to anti-TNF biologics. Attempts to identify molecular biomarkers predicting response have met with mixed success. This may be attributable, in part, to the variable and subjective disease assessment endpoints with large placebo effects typically used to classify patient response. Sixty-one patients with active RA despite methotrexate treatment, and with MRI-documented synovitis, were randomized to receive infliximab or placebo. Blood was collected at baseline and genome-wide transcription in whole blood was measured using microarrays. The primary endpoint in this study was determined by measuring the transfer rate constant (Ktrans) of a gadolinium-based contrast agent from plasma to synovium using MRI. Secondary endpoints included repeated clinical assessments with DAS28(CRP), and assessments of osteitis and synovitis by the RAMRIS method. Infliximab showed greater decrease from baseline in DCE-MRI Ktrans of wrist and MCP at all visits compared with placebo (P<0.001). Statistical analysis was performed to identify genes associated with treatment-specific 14-week change in Ktrans. The 256 genes identified were used to derive a gene signature score by averaging their log expression within each patient. The resulting score correlated with improvement of Ktrans in infliximab-treated patients and with deterioration of Ktrans in placebo-treated subjects. Poor responders showed high expression of activated B-cell genes whereas good responders exhibited a gene expression pattern consistent with mobilization of neutrophils and monocytes and high levels of reticulated platelets. This gene signature was significantly associated with clinical response in two previously published whole blood gene expression studies using anti-TNF therapies. These data provide support for the hypothesis that anti-TNF inadequate responders comprise a distinct molecular subtype of RA characterized by differences in pre-treatment blood mRNA expression. They also highlight the importance of placebo controls and robust, objective endpoints in biomarker discovery. Trial Registration: ClinicalTrials.gov NCT01313520
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Affiliation(s)
- Kenzie D. MacIsaac
- Merck & Co. Inc., Department of Genetics and Pharmacogenomics, Boston, Massachusetts, United States of America
- * E-mail:
| | - Richard Baumgartner
- Merck & Co. Inc., Department of Biometrics Research, Whitehouse Station, New Jersey, United States of America
| | - Jia Kang
- Merck & Co. Inc., Department of Biometrics Research, Whitehouse Station, New Jersey, United States of America
| | - Andrey Loboda
- Merck & Co. Inc., Department of Genetics and Pharmacogenomics, Boston, Massachusetts, United States of America
| | - Charles Peterfy
- Spire Sciences Inc., Boca Raton, Florida, United States of America
| | - Julie DiCarlo
- Spire Sciences Inc., Boca Raton, Florida, United States of America
| | - Jonathan Riek
- Virtual Scopics, Rochester, New York, United States of America
| | - Chan Beals
- Merck & Co. Inc., Clinical Research, Whitehouse Station, New Jersey, United States of America
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Tang Q, Jiang D, Harfuddin Z, Cheng K, Moh MC, Schwarz H. Regulation of myelopoiesis by CD137L signaling. Int Rev Immunol 2014; 33:454-69. [PMID: 24941289 DOI: 10.3109/08830185.2014.921163] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
CD137 ligand (CD137L) has emerged as a powerful regulator of myelopoiesis that links emergency situations, such as infections, to the generation of additional myeloid cells, and to their activation and maturation. CD137L is expressed on the cell surface of hematopoietic stem and progenitor cells (HSPC) and antigen presenting cells (APC) as a transmembrane protein. The signaling of CD137L into HSPC induces their proliferation and differentiation to monocytes and macrophages, and in monocytes CD137L signaling induces differentiation to potent dendritic cells (DC). CD137L signaling is initiated by CD137 which is expressed by T cells, once they become activated. Some of these activated, CD137-expressing T cells migrate from the site of infection to the bone marrow where they interact with HSPC to induce myelopoiesis, or they induce monocyte to DC differentiation locally at the site of infection. Therapeutically, induction of CD137L signaling can be utilized to reinitiate myeloid differentiation in acute myeloid leukemia cells, and to generate potent DC for immunotherapy.
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Hohensinner PJ, Goronzy JJ, Weyand CM. Targets of immune regeneration in rheumatoid arthritis. Mayo Clin Proc 2014; 89:563-75. [PMID: 24684878 PMCID: PMC4605139 DOI: 10.1016/j.mayocp.2014.01.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/27/2014] [Accepted: 01/29/2014] [Indexed: 10/25/2022]
Abstract
Many of the aging-related morbidities, including cancer, cardiovascular disease, neurodegenerative disease, and infectious susceptibility, are linked to a decline in immune competence with a concomitant rise in proinflammatory immunity, placing the process of immune aging at the center of aging biology. Immune aging affects individuals older than 50 years and is accelerated in patients with the autoimmune disease rheumatoid arthritis. Immune aging results in a marked decline in protective immune responses and a parallel increase in tissue inflammatory responses. By studying immune cells in patients with rheumatoid arthritis, several of the molecular underpinnings of the immune aging process have been delineated, such as the loss of telomeres and inefficiencies in the repair of damaged DNA. Aging T cells display a series of abnormalities, including the unopposed up-regulation of cytoplasmic phosphatases and the loss of glycolytic competence, that alter their response to stimulating signals and undermine their longevity. Understanding the connection between accelerated immune aging and autoimmunity remains an area of active research. With increasing knowledge of the molecular pathways that cause immunosenescence, therapeutic interventions can be designed to slow or halt the seemingly inevitable deterioration of protective immunity with aging.
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Affiliation(s)
- Philipp J Hohensinner
- Department of Medicine, Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA
| | - Jörg J Goronzy
- Department of Medicine, Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA
| | - Cornelia M Weyand
- Department of Medicine, Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA.
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Seijkens T, Hoeksema MA, Beckers L, Smeets E, Meiler S, Levels J, Tjwa M, de Winther MPJ, Lutgens E. Hypercholesterolemia-induced priming of hematopoietic stem and progenitor cells aggravates atherosclerosis. FASEB J 2014; 28:2202-13. [PMID: 24481967 DOI: 10.1096/fj.13-243105] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Modulation of hematopoietic stem and progenitor cells (HSPCs) determines immune cell function. In this study, we investigated how hypercholesterolemia affects HSPC biology and atherosclerosis. Hypercholesterolemia induced loss of HSPC quiescence, characterized by increased proliferation and expression of cyclin B1, C1, and D1, and a decreased expression of Rb, resulting in a 3.6- fold increase in the number of HSPCs in hypercholesterolemic Ldlr(-/-) mice. Competitive bone marrow (BM) transplantations showed that a hypercholesterolemic BM microenvironment activates HSPCs and skews their development toward myeloid lineages. Conversely, hypercholesterolemia-primed HSPCs acquired an enhanced propensity to generate myeloid cells, especially granulocytes and Ly6C(high) monocytes, even in a normocholesterolemic BM microenvironment. In conformity, macrophages differentiated from hypercholesterolemia-primed HSPCs produced 17.0% more TNF-α, 21.3% more IL-6, and 10.5% more MCP1 than did their normocholesterolemic counterparts. Hypercholesterolemia-induced priming of HSPCs generated leukocytes that more readily migrated into the artery, which resulted in a 2.1-fold increase in atherosclerotic plaque size. In addition, these plaques had a more advanced phenotype and exhibited a 1.2-fold increase in macrophages and 1.8-fold increase in granulocytes. These results identify hypercholesterolemia-induced activation and priming of HSPCs as a novel pathway in the development of atherosclerosis. Inhibition of this proinflammatory differentiation pathway on the HSPC level has the potential to reduce atherosclerosis.
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Affiliation(s)
- Tom Seijkens
- 1Department of Medical Biochemistry, Academic Medical Center (AMC), University of Amsterdam, Meibergdreef 15, 1105 CZ Amsterdam, The Netherlands.
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Sangaletti S, Tripodo C, Vitali C, Portararo P, Guarnotta C, Casalini P, Cappetti B, Miotti S, Pinciroli P, Fuligni F, Fais F, Piccaluga PP, Colombo MP. Defective stromal remodeling and neutrophil extracellular traps in lymphoid tissues favor the transition from autoimmunity to lymphoma. Cancer Discov 2014; 4:110-29. [PMID: 24189145 DOI: 10.1158/2159-8290.cd-13-0276] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Altered expression of matricellular proteins can become pathogenic in the presence of persistent perturbations in tissue homeostasis. Here, we show that autoimmunity associated with Fas mutation was exacerbated and transitioned to lymphomagenesis in the absence of SPARC (secreted protein acidic rich in cysteine). The absence of SPARC resulted in defective collagen assembly, with uneven compartmentalization of lymphoid and myeloid populations within secondary lymphoid organs (SLO), and faulty delivery of inhibitory signals from the extracellular matrix. These conditions promoted aberrant interactions between neutrophil extracellular traps and CD5(+) B cells, which underwent malignant transformation due to defective apoptosis under the pressure of neutrophil-derived trophic factors and NF-κB activation. Furthermore, this model of defective stromal remodeling during lymphomagenesis correlates with human lymphomas arising in a SPARC-defective environment, which is prototypical of CD5(+) B-cell chronic lymphocytic leukemia (CLL).
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Affiliation(s)
- Sabina Sangaletti
- 1Molecular Immunology Unit, 2Molecular Targeting Unit, and 3Molecular Therapies Unit, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale Tumori, Milan; 4Tumor Immunology Unit, Department of Health Sciences, University of Palermo, Palermo; 5Hematopathology Section, Department of Hematology and Oncology L. and A. Seràgnoli, S. Orsola-Malpighi Hospital, University of Bologna, Bologna; and 6Human Anatomy Section, Department of Experimental Medicine, University of Genova, Genova, Italy
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Murakami S, Yamamoto M, Motohashi H. Hematopoietic stem and progenitor cell activation during chronic dermatitis provoked by constitutively active aryl-hydrocarbon receptor driven by Keratin 14 promoter. Toxicol Sci 2013; 138:47-58. [PMID: 24287212 DOI: 10.1093/toxsci/kft273] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) activate aryl-hydrocarbon receptor (AhR). Because PAHs are known as a risk factor for allergic diseases, PAH-induced AhR activation is expected to be involved in the development of the pathology. We previously generated transgenic mice expressing a constitutively active AhR (AhR-CA) under the control of Keratin 14 (K14) promoter (AhR-CA mouse). The mice develop chronic dermatitis with immune imbalance toward Th2 predominance, indicating that the AhR activation driven by K14 promoter provokes allergic response. Because hematopoietic cells actively participate in the development of allergic inflammation, it is important to understand the hematopoietic status under allergic conditions. To clarify how the K14 promoter-driven AhR activation influences hematopoiesis, we analyzed bone marrow and spleen of AhR-CA mice. We verified that AhR-CA was expressed in keratinocytes and thymic epithelial cells but not in hematopoietic cells. The AhR-CA mice with full-blown dermatitis exhibited leukocytosis and skewed differentiation of hematopoietic progenitor cells toward granulocyte-monocyte lineages. They also showed a significant expansion of short-term hematopoietic stem cells and multipotent progenitors and a subtle reduction in long-term hematopoietic stem cells (LT-HSCs). Their spleens were enlarged and abundantly accumulated hematopoietic stem and progenitor cells. AhR-CA mice at the early stage of dermatitis did not show leukocytosis or splenomegaly but exhibited the granulocyte-monocyte skewing and the reduction in LT-HSCs. Thus, AhR activation driven by K14 promoter already alters the hematopoietic differentiation and reduces LT-HSCs at the initial stage of dermatitis development. These results suggest that nonhematopoietic exposure to PAHs triggers allergic response and concomitantly affects hematopoiesis.
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Affiliation(s)
- Shohei Murakami
- * Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Miyagi 980-8575, Japan
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Richardson CL, Delehanty LL, Bullock GC, Rival CM, Tung KS, Kimpel DL, Gardenghi S, Rivella S, Goldfarb AN. Isocitrate ameliorates anemia by suppressing the erythroid iron restriction response. J Clin Invest 2013; 123:3614-23. [PMID: 23863711 DOI: 10.1172/jci68487] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 05/09/2013] [Indexed: 12/22/2022] Open
Abstract
The unique sensitivity of early red cell progenitors to iron deprivation, known as the erythroid iron restriction response, serves as a basis for human anemias globally. This response impairs erythropoietin-driven erythropoiesis and underlies erythropoietic repression in iron deficiency anemia. Mechanistically, the erythroid iron restriction response results from inactivation of aconitase enzymes and can be suppressed by providing the aconitase product isocitrate. Recent studies have implicated the erythroid iron restriction response in anemia of chronic disease and inflammation (ACDI), offering new therapeutic avenues for a major clinical problem; however, inflammatory signals may also directly repress erythropoiesis in ACDI. Here, we show that suppression of the erythroid iron restriction response by isocitrate administration corrected anemia and erythropoietic defects in rats with ACDI. In vitro studies demonstrated that erythroid repression by inflammatory signaling is potently modulated by the erythroid iron restriction response in a kinase-dependent pathway involving induction of the erythroid-inhibitory transcription factor PU.1. These results reveal the integration of iron and inflammatory inputs in a therapeutically tractable erythropoietic regulatory circuit.
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Affiliation(s)
- Chanté L Richardson
- Department of Pathology, University of Virginia, School of Medicine, Charlottesville, Virginia, USA
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Zhang Y, Jones M, McCabe A, Winslow GM, Avram D, MacNamara KC. MyD88 signaling in CD4 T cells promotes IFN-γ production and hematopoietic progenitor cell expansion in response to intracellular bacterial infection. THE JOURNAL OF IMMUNOLOGY 2013; 190:4725-35. [PMID: 23526822 DOI: 10.4049/jimmunol.1203024] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Hematopoietic stem and progenitor cell (HSPC) phenotype and function can change in response to infectious challenge. These changes can be mediated by cytokines, IFNs, and pathogen-associated molecules, via TLR, and are thought to promote tailored immune responses for particular pathogens. In this study, we investigated the signals that activate HSPCs during ehrlichiosis, a disease characterized by profound hematopoietic dysfunction in both humans and mice. In a mouse model of ehrlichiosis, we observed that infection-induced proliferation of bone marrow HSPCs was dependent on IFN-γ signaling and was partially dependent on MyD88. However, MyD88 was not required in HSPCs for their expansion during infection, because similar frequencies of MyD88-deficient and wild-type HSPCs proliferated in mixed bone marrow chimeric mice. MyD88-deficient mice exhibited low serum and bone marrow concentration of IFN-γ compared with wild-type mice. We next identified CD4 T cells as the primary cells producing IFN-γ in the bone marrow and demonstrated a nonredundant role for CD4-derived IFN-γ in increased HSPCs. Using mixed bone marrow chimeric mice, we identified a requirement for MyD88 in CD4 T cells for increased T-bet expression, optimal IFN-γ production, and CD4 T cell proliferation. Our data demonstrate an essential role for CD4 T cells in mediating HSPC activation in response to bacterial infection and illustrate a novel role for MyD88 signaling in CD4 T cells in this process. These findings further support the idea that IFN-γ production is essential for HSPC activation and hematopoietic responses to infection.
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Affiliation(s)
- Yubin Zhang
- Center for Immunology and Microbial Disease, Albany Medical College, Albany, NY 12208, USA
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