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Hosoki K, Govindhan A, Knight JM, Sur S. Allosteric inhibition of CXCR1 and CXCR2 abrogates Th2/Th17-associated Allergic Lung Inflammation in Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.13.593638. [PMID: 38798651 PMCID: PMC11118468 DOI: 10.1101/2024.05.13.593638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Background IL4, IL5, IL13, and IL17-producing CD4 T helper 2 (Th2)-cells and IL17-producing CD4 T helper 17 (Th17)-cells contribute to chronic eosinophilic and neutrophilic airway inflammation in asthma and allergic airway inflammation. Chemokines and their receptors are upregulated in Th2/Th17-mediated inflammation. However, the ability of CXCR1 and CXCR2 modulate Th2 and Th17-cell-mediated allergic lung inflammation has not been reported. Methods Mice sensitized and challenged with cat dander extract (CDE) mount a vigorous Th2-Th17-mediated allergic lung inflammation. Allosteric inhibitor of CXCR1 and CXCR2, ladarixin was orally administered in this model. The ability of ladarixin to modulate allergen-challenge induced recruitment of CXCR1 and CXCR2-expressing Th2 and Th17-cells and allergic lung inflammation were examined. Results Allergen challenge in sensitized mice increased mRNA expression levels of Il4, Il5, Il13, Il6, Il1β, Tgfβ1, Il17, Il23, Gata3, and Rorc , and induced allergic lung inflammation characterized by recruitment of CXCR1- and CXCR2-expressing Th2-cells, Th17-cells, neutrophils, and eosinophils. Allosteric inhibition of CXCR1 and CXCR2 vigorously blocked each of these pro-inflammatory effects of allergen challenge. CXCL chemokines induced a CXCR1 and CXCR2-dependent proliferation of IL4, IL5, IL13, and IL17 expressing T-cells. Conclusion Allosteric inhibition of CXCR1 and CXCR2 abrogates blocks recruitment of CXCR1- and CXCR2-expressing Th2-cells, Th17-cells, neutrophils, and eosinophils in this mouse model of allergic lung inflammation. We suggest that the ability of allosteric inhibition of CXCR1 and CXCR2 to abrogate Th2 and Th17-mediated allergic inflammation should be investigated in humans.
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Chen SJ, Hashimoto K, Fujio K, Hayashi K, Paul SK, Yuzuriha A, Qiu WY, Nakamura E, Kanashiro MA, Kabata M, Nakamura S, Sugimoto N, Kaneda A, Yamamoto T, Saito H, Takayama N, Eto K. A let-7 microRNA-RALB axis links the immune properties of iPSC-derived megakaryocytes with platelet producibility. Nat Commun 2024; 15:2588. [PMID: 38519457 PMCID: PMC10960040 DOI: 10.1038/s41467-024-46605-0] [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: 07/06/2023] [Accepted: 03/04/2024] [Indexed: 03/25/2024] Open
Abstract
We recently achieved the first-in-human transfusion of induced pluripotent stem cell-derived platelets (iPSC-PLTs) as an alternative to standard transfusions, which are dependent on donors and therefore variable in supply. However, heterogeneity characterized by thrombopoiesis-biased or immune-biased megakaryocytes (MKs) continues to pose a bottleneck against the standardization of iPSC-PLT manufacturing. To address this problem, here we employ microRNA (miRNA) switch biotechnology to distinguish subpopulations of imMKCLs, the MK cell lines producing iPSC-PLTs. Upon miRNA switch-based screening, we find imMKCLs with lower let-7 activity exhibit an immune-skewed transcriptional signature. Notably, the low activity of let-7a-5p results in the upregulation of RAS like proto-oncogene B (RALB) expression, which is crucial for the lineage determination of immune-biased imMKCL subpopulations and leads to the activation of interferon-dependent signaling. The dysregulation of immune properties/subpopulations, along with the secretion of inflammatory cytokines, contributes to a decline in the quality of the whole imMKCL population.
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Affiliation(s)
- Si Jing Chen
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
- Department of Regenerative Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Kazuya Hashimoto
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Kosuke Fujio
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Karin Hayashi
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Sudip Kumar Paul
- Department of Regenerative Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Akinori Yuzuriha
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Wei-Yin Qiu
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Emiri Nakamura
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | | | - Mio Kabata
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Sou Nakamura
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Naoshi Sugimoto
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Atsushi Kaneda
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takuya Yamamoto
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, Japan
- Medical-risk Avoidance Based on iPS Cells Team, RIKEN Center for Advanced Intelligence Project (AIP), Kyoto, Japan
| | - Hirohide Saito
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan.
| | - Naoya Takayama
- Department of Regenerative Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
| | - Koji Eto
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan.
- Department of Regenerative Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
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3
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Huang M, Wang L, Zhang Q, Zhou L, Liao R, Wu A, Wang X, Luo J, Huang F, Zou W, Wu J. Interleukins in Platelet Biology: Unraveling the Complex Regulatory Network. Pharmaceuticals (Basel) 2024; 17:109. [PMID: 38256942 PMCID: PMC10820339 DOI: 10.3390/ph17010109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/04/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Interleukins, a diverse family of cytokines produced by various cells, play crucial roles in immune responses, immunoregulation, and a wide range of physiological and pathological processes. In the context of megakaryopoiesis, thrombopoiesis, and platelet function, interleukins have emerged as key regulators, exerting significant influence on the development, maturation, and activity of megakaryocytes (MKs) and platelets. While the therapeutic potential of interleukins in platelet-related diseases has been recognized for decades, their clinical application has been hindered by limitations in basic research and challenges in drug development. Recent advancements in understanding the molecular mechanisms of interleukins and their interactions with MKs and platelets, coupled with breakthroughs in cytokine engineering, have revitalized the field of interleukin-based therapeutics. These breakthroughs have paved the way for the development of more effective and specific interleukin-based therapies for the treatment of platelet disorders. This review provides a comprehensive overview of the effects of interleukins on megakaryopoiesis, thrombopoiesis, and platelet function. It highlights the potential clinical applications of interleukins in regulating megakaryopoiesis and platelet function and discusses the latest bioengineering technologies that could improve the pharmacokinetic properties of interleukins. By synthesizing the current knowledge in this field, this review aims to provide valuable insights for future research into the clinical application of interleukins in platelet-related diseases.
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Affiliation(s)
- Miao Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (M.H.); (Q.Z.)
| | - Long Wang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Qianhui Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (M.H.); (Q.Z.)
| | - Ling Zhou
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Rui Liao
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Anguo Wu
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Xinle Wang
- Department of Physiology, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China; (X.W.); (J.L.)
| | - Jiesi Luo
- Department of Physiology, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China; (X.W.); (J.L.)
| | - Feihong Huang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Wenjun Zou
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (M.H.); (Q.Z.)
| | - Jianming Wu
- Department of Physiology, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China; (X.W.); (J.L.)
- The Key Laboratory of Medical Electrophysiology, Institute of Cardiovascular Research, Ministry of Education of China, Luzhou 646000, China
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4
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Martín-González C, Ribot-Hernández I, Fernández-Rodríguez CM, Pérez-Hernández O, González-Navarrete L, Godoy-Reyes AM, Rodríguez-Gaspar M, Martínez-Riera A, González-Reimers E. Mean platelet volume and mortality in patients with alcohol use disorder. Dig Liver Dis 2023; 55:1236-1241. [PMID: 37277289 DOI: 10.1016/j.dld.2023.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/21/2023] [Accepted: 05/23/2023] [Indexed: 06/07/2023]
Abstract
Several recent studies have pointed out the relationship of platelet size with increased mortality or adverse clinical course. Most studies show that increased mean platelet volume (MPV) may be associated with a deleterious outcome in different settings such as sepsis or neoplasia, whereas other researchers have found the opposite. In inflammatory conditions there is an altered secretion of several cytokines, some of them exerting a marked influence on platelet biogenesis and/or on platelet activation and aggregation. Alcohol use disorder is a chronic situation characterized by a protracted low-grade inflammation. In this study we analyze the relationship between proinflammatory cytokines and MPV and their relationships with mortality in patients with alcohol abuse. We determined serum levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6 and IL-8 and routine laboratory variables among 184 patients with alcohol use disorder admitted to our hospital and followed-up for a median of 42 months. We found that MPV was inversely related to TNF-α (ρ=-0.34), and directly to IL-8 (ρ=0.32, p<0.001 in both cases) and to IL-6 (ρ=0.15; p = 0.046). Reduced MPV was related both with short-term (<6 months) and long-term mortality. Conclusion: These results suggest that inflammatory cytokines are strongly related to MPV. A low MPV is associated with a poor prognosis among patients with alcohol use disorder.
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Affiliation(s)
- Candelaria Martín-González
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain.
| | - Iván Ribot-Hernández
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Camino M Fernández-Rodríguez
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Onán Pérez-Hernández
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Lourdes González-Navarrete
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Ana M Godoy-Reyes
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Melchor Rodríguez-Gaspar
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Antonio Martínez-Riera
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | - Emilio González-Reimers
- Servicio de Medicina Interna, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
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Arciprete F, Verachi P, Martelli F, Valeri M, Balliu M, Guglielmelli P, Vannucchi AM, Migliaccio AR, Zingariello M. Inhibition of CXCR1/2 reduces the emperipolesis between neutrophils and megakaryocytes in the Gata1 low model of myelofibrosis. Exp Hematol 2023; 121:30-37. [PMID: 36863479 DOI: 10.1016/j.exphem.2023.02.003] [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: 02/08/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 03/04/2023]
Abstract
Emperipolesis between neutrophils and megakaryocytes was first identified by transmission electron microscopy. Although rare under steady-state conditions, its frequency greatly increases in myelofibrosis, the most severe of myeloproliferative neoplasms, in which it is believed to contribute to increasing the transforming growth factor (TGF)-β microenvironmental bioavailability responsible for fibrosis. To date, the challenge of performing studies by transmission electron microscopy has hampered the study of factors that drive the pathological emperipolesis observed in myelofibrosis. We established a user-friendly confocal microscopy method that detects emperipolesis by staining with CD42b, specifically expressed on megakaryocytes, coupled with antibodies that recognize the neutrophils (Ly6b or neutrophil elastase antibody). With such an approach, we first confirmed that the bone marrow from patients with myelofibrosis and from Gata1low mice, a model of myelofibrosis, contains great numbers of neutrophils and megakaryocytes in emperipolesis. Both in patients and Gata1low mice, the emperipolesed megakaryocytes were surrounded by high numbers of neutrophils, suggesting that neutrophil chemotaxis precedes the actual emperipolesis event. Because neutrophil chemotaxis is driven by CXCL1, the murine equivalent of human interleukin 8 that is expressed at high levels by malignant megakaryocytes, we tested the hypothesis that neutrophil/megakaryocyte emperipolesis could be reduced by reparixin, an inhibitor of CXCR1/CXCR2. Indeed, the treatment greatly reduced both neutrophil chemotaxis and their emperipolesis with the megakaryocytes in treated mice. Because treatment with reparixin was previously reported to reduce both TGF-β content and marrow fibrosis, these results identify neutrophil/megakaryocyte emperipolesis as the cellular interaction that links interleukin 8 to TGF-β abnormalities in the pathobiology of marrow fibrosis.
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Affiliation(s)
- Francesca Arciprete
- Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy
| | - Paola Verachi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Fabrizio Martelli
- National Center for Preclinical and Clinical Research and Evaluation of Pharmaceutical Drugs, Istituto Superiore di Sanità, Rome, Italy
| | - Mauro Valeri
- Center for Animal Experimentation and Well-Being, Istituto Superiore di Sanità, Rome, Italy
| | - Manjola Balliu
- Center Research and Innovation of Myeloproliferative Neoplasm, University Hospital Careggi, University of Florence, Florence, Italy
| | - Paola Guglielmelli
- Center Research and Innovation of Myeloproliferative Neoplasm, University Hospital Careggi, University of Florence, Florence, Italy
| | - Alessandro Maria Vannucchi
- Center Research and Innovation of Myeloproliferative Neoplasm, University Hospital Careggi, University of Florence, Florence, Italy
| | - Anna Rita Migliaccio
- Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy; Altius Institute for Biomedical Sciences, Seattle, WA
| | - Maria Zingariello
- Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy.
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6
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Verachi P, Gobbo F, Martelli F, Falchi M, di Virgilio A, Sarli G, Wilke C, Bruederle A, Prahallad A, Arciprete F, Zingariello M, Migliaccio AR. Preclinical studies on the use of a P-selectin-blocking monoclonal antibody to halt progression of myelofibrosis in the Gata1 low mouse model. Exp Hematol 2023; 117:43-61. [PMID: 36191885 PMCID: PMC10450205 DOI: 10.1016/j.exphem.2022.09.004] [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: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 01/10/2023]
Abstract
The bone marrow (BM) and spleen from patients with myelofibrosis (MF), as well as those from the Gata1low mouse model of the disease contain increased number of abnormal megakaryocytes. These cells express high levels of the adhesion receptor P-selectin on their surface, which triggers a pathologic neutrophil emperipolesis, leading to increased bioavailability of transforming growth factor-β (TGF-β) in the microenvironment and disease progression. With age, Gata1low mice develop a phenotype similar to that of patients with MF, which is the most severe of the Philadelphia-negative myeloproliferative neoplasms. We previously demonstrated that Gata1low mice lacking the P-selectin gene do not develop MF. In the current study, we tested the hypothesis that pharmacologic inhibition of P-selectin may normalize the phenotype of Gata1low mice that have already developed MF. To test this hypothesis, we have investigated the phenotype expressed by aged Gata1low mice treated with the antimouse monoclonal antibody RB40.34, alone and also in combination with ruxolitinib. The results indicated that RB40.34 in combination with ruxolitinib normalizes the phenotype of Gata1low mice with limited toxicity by reducing fibrosis and the content of TGF-β and CXCL1 (two drivers of fibrosis in this model) in the BM and spleen and by restoring hematopoiesis in the BM and the architecture of the spleen. In conclusion, we provide preclinical evidence that treatment with an antibody against P-selectin in combination with ruxolitinib may be more effective than ruxolitinib alone to treat MF in patients.
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Affiliation(s)
- Paola Verachi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Francesca Gobbo
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy; Department of Veterinary Medical Sciences, University of Bologna, Italy
| | - Fabrizio Martelli
- National Center for Preclinical and Clinical Research and Evaluation of Pharmaceutical Drugs, Istituto Superiore di Sanità, Rome, Italy
| | - Mario Falchi
- National Center for HIV/AIDS Research, Istituto Superiore di Sanità, Rome, Italy
| | - Antonio di Virgilio
- Center for Animal Experimentation and Well-being, Istituto Superiore di Santà, Rome, Italy
| | - Giuseppe Sarli
- Department of Veterinary Medical Sciences, University of Bologna, Italy
| | | | | | | | - Francesca Arciprete
- Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy
| | - Maria Zingariello
- Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy
| | - Anna Rita Migliaccio
- Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy; Altius Institute for Biomedical Sciences, Seattle, WA, USA.
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7
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Liu N, Bauer M, Press AT. The immunological function of CXCR2 in the liver during sepsis. J Inflamm (Lond) 2022; 19:23. [DOI: 10.1186/s12950-022-00321-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 11/15/2022] [Indexed: 12/02/2022] Open
Abstract
Abstract
Background
The chemokine receptor CXCR2 and its ligands, especially CXCL8, are crucial mediators for the progression of liver inflammation and liver failure in sepsis. Neutrophils have the highest CXCR2 expression in mice and humans, and their activation via CXCL8 facilitates their migration to the inflamed liver for the clearance of the pathogens and, in turn, the inflammation.
Main body
In sepsis, the inflammatory insult causes extensive neutrophil migration to the liver that overwhelms the immune response. To compensate for the strong receptor activation, CXCR2 desensitizes, incapacitating the immune cells to efficiently clear pathogens, causing further life-threatening liver damage and uncontrolled pathogen spread.
Conclusion
CXCR2 function during infection strongly depends on the expressing cell type. It signals pro- and anti-inflammatory effects that may prompt novel cell-type-specific CXCR2-directed therapeutics.
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Migliaccio AR, Balduini A, Zhan H. Editorial: Megakaryocytes as regulators of tumor microenvironments. Front Oncol 2022; 12:1090658. [PMID: 36505825 PMCID: PMC9732936 DOI: 10.3389/fonc.2022.1090658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 11/09/2022] [Indexed: 11/27/2022] Open
Affiliation(s)
- Anna Rita Migliaccio
- Center for Integrated Biomedical Research, Campus Bio-medico, Rome, Italy
- Altius Institute for Biomedical Sciences, Seattle, WA, United States
| | - Alessandra Balduini
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
| | - Huichun Zhan
- Department of Medicine, Stony Brook School of Medicine, Stony Brook, NY, United States
- Medical Service, Northport VA Medical Center, Northport, NY, United States
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Waksal JA, Mascarenhas J. Novel Therapies in Myelofibrosis: Beyond JAK Inhibitors. Curr Hematol Malig Rep 2022; 17:140-154. [PMID: 35984598 DOI: 10.1007/s11899-022-00671-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To discuss the current treatment paradigm, review novel targets, and summarize completed and ongoing clinical trials that may lead to a paradigm shifts in the management of myelofibrosis (MF). RECENT FINDINGS In addition to the recent approval and ongoing late-stage development of multiple novel JAK inhibitors, recent clinical studies demonstrate therapeutic potential of targeting multiple alternate proteins and pathways including BET, MDM2, telomerase, BCL2, LSD1, PI3K, SMAC, and PTX2 in patients with MF. MF is a myeloproliferative neoplasm characterized by clonal proliferation of myeloid cells and bone marrow fibrosis often causing cytopenias, extramedullary hematopoiesis resulting in hepatosplenomegaly, and increased pro-inflammatory cytokine production driving systemic symptoms. A significant proportion of morbidity and mortality is related to the propensity to transform to acute leukemia. Allogeneic hematopoietic stem cell transplantation is the only curative therapy; however, due to the high associated mortality, this treatment is not an option for the majority of patients with MF. Currently, there are three targeted Food and Drug Administration (FDA)-approved therapies for MF which include ruxolitinib, fedratinib, and pacritinib, all part of the JAK inhibitor class. Many patients are unable to tolerate, do not respond, or develop resistance to existing therapies, leaving a large unmet medical need. In this review, we discuss the current treatment paradigm and novel therapies in development for the treatment of MF. We review the scientific rationale of each targeted pathway. We summarize updated clinical data and ongoing trials that may lead to FDA approval of these agents.
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Affiliation(s)
- Julian A Waksal
- Tisch Cancer Institute, Division of Hematology/Oncology, Icahn School of Medicine at Mount Sinai, Box 1079, One Gustave L Levy Place, New York, NY, 10029, USA
| | - John Mascarenhas
- Tisch Cancer Institute, Division of Hematology/Oncology, Icahn School of Medicine at Mount Sinai, Box 1079, One Gustave L Levy Place, New York, NY, 10029, USA.
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10
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Verachi P, Gobbo F, Martelli F, Martinelli A, Sarli G, Dunbar A, Levine RL, Hoffman R, Massucci MT, Brandolini L, Giorgio C, Allegretti M, Migliaccio AR. The CXCR1/CXCR2 Inhibitor Reparixin Alters the Development of Myelofibrosis in the Gata1 low Mice. Front Oncol 2022; 12:853484. [PMID: 35392239 PMCID: PMC8982152 DOI: 10.3389/fonc.2022.853484] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/16/2022] [Indexed: 11/13/2022] Open
Abstract
A major role for human (h)CXCL8 (interleukin-8) in the pathobiology of myelofibrosis (MF) has been suggested by observations indicating that MF megakaryocytes express increased levels of hCXCL8 and that plasma levels of this cytokine in MF patients are predictive of poor patient outcomes. Here, we demonstrate that, in addition to high levels of TGF-β, the megakaryocytes from the bone marrow of the Gata1 low mouse model of myelofibrosis express high levels of murine (m)CXCL1, the murine equivalent of hCXCL8, and its receptors CXCR1 and CXCR2. Treatment with the CXCR1/R2 inhibitor, Reparixin in aged-matched Gata1 low mice demonstrated reductions in bone marrow and splenic fibrosis. Of note, the levels of fibrosis detected using two independent methods (Gomori and reticulin staining) were inversely correlated with plasma levels of Reparixin. Immunostaining of marrow sections indicated that the bone marrow from the Reparixin-treated group expressed lower levels of TGF-β1 than those expressed by the bone marrow from vehicle-treated mice while the levels of mCXCL1, and expression of CXCR1 and CXCR2, were similar to that of vehicle-treated mice. Moreover, immunofluorescence analyses performed on bone marrow sections from Gata1 low mice indicated that treatment with Reparixin induced expression of GATA1 while reducing expression of collagen III in megakaryocytes. These data suggest that in Gata1low mice, Reparixin reduces fibrosis by reducing TGF-β1 and collagen III expression while increasing GATA1 in megakaryocytes. Our results provide a preclinical rationale for further evaluation of this drug alone and in combination with current JAK inhibitor therapy for the treatment of patients with myelofibrosis.
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Affiliation(s)
- Paola Verachi
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum University, Bologna, Italy
| | - Francesca Gobbo
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum University, Bologna, Italy
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Fabrizio Martelli
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, Rome, Italy
| | - Andrea Martinelli
- Center for Animal Experimentation and Well-Being, Istituto Superiore di Santà, Rome, Italy
| | - Giuseppe Sarli
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Andrew Dunbar
- Human Oncology & Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, United States
- Leukemia Service, Department of Medicine and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Ross L. Levine
- Human Oncology & Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, United States
- Leukemia Service, Department of Medicine and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, United States
- Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Ronald Hoffman
- Division of Hematology/Oncology, Tisch Cancer Institute and Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | | | | | | | | | - Anna Rita Migliaccio
- Center for Integrated Biomedical Research, Campus Bio-medico, Rome, Italy
- Altius Institute for Biomedical Sciences, Seattle, WA, United States
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11
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Ricolinostat promotes the generation of megakaryocyte progenitors from human hematopoietic stem and progenitor cells. Stem Cell Res Ther 2022; 13:54. [PMID: 35123563 PMCID: PMC8817546 DOI: 10.1186/s13287-022-02722-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 01/13/2022] [Indexed: 11/13/2022] Open
Abstract
Background Ex vivo production of induced megakaryocytes (MKs) and platelets from stem cells is an alternative approach for supplying transfusible platelets. However, it is difficult to generate large numbers of MKs and platelets from hematopoietic stem cells and progenitor cells (HSPCs).
Methods To optimize the differentiation efficiency of megakaryocytic cells from HSPCs, we first employed a platelet factor 4 (PF4)-promoter reporter and high-throughput screening strategy to screen for small molecules. We also investigated the effects and possible mechanisms of candidate small molecules on megakaryocytic differentiation of human HSPCs. Results The small molecule Ricolinostat remarkably promoted the expression of PF4-promoter reporter in the megakaryocytic cell line. Notably, Ricolinostat significantly enhanced the cell fate commitment of MK progenitors (MkPs) from cord blood HSPCs and promoted the proliferation of MkPs based on cell surface marker detection, colony-forming unit-MK assay, and quantitative real-time PCR analyses. MkPs generated from Ricolinostat-induced HSPCs differentiated into mature MKs and platelets. Mechanistically, we found that Ricolinostat enhanced MkP fate mainly by inhibiting the secretion of IL-8 and decreasing the expression of the IL-8 receptor CXCR2. Conclusion The addition of Ricolinostat to the culture medium promoted MkP differentiation from HSPCs and enhanced the proliferation of MkPs mainly by suppressing the IL-8/CXCR2 pathway. Our results can help the development of manufacturing protocols for the efficient generation of MKs and platelets from stem cells in vitro. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02722-5.
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12
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Zingariello M, Verachi P, Gobbo F, Martelli F, Falchi M, Mazzarini M, Valeri M, Sarli G, Marinaccio C, Melo-Cardenas J, Crispino JD, Migliaccio AR. Resident Self-Tissue of Proinflammatory Cytokines Rather than Their Systemic Levels Correlates with Development of Myelofibrosis in Gata1low Mice. Biomolecules 2022; 12:biom12020234. [PMID: 35204735 PMCID: PMC8961549 DOI: 10.3390/biom12020234] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 01/27/2022] [Accepted: 01/27/2022] [Indexed: 02/05/2023] Open
Abstract
Serum levels of inflammatory cytokines are currently investigated as prognosis markers in myelofibrosis, the most severe Philadelphia-negative myeloproliferative neoplasm. We tested this hypothesis in the Gata1low model of myelofibrosis. Gata1low mice, and age-matched wild-type littermates, were analyzed before and after disease onset. We assessed cytokine serum levels by Luminex-bead-assay and ELISA, frequency and cytokine content of stromal cells by flow cytometry, and immunohistochemistry and bone marrow (BM) localization of GFP-tagged hematopoietic stem cells (HSC) by confocal microscopy. Differences in serum levels of 32 inflammatory-cytokines between prefibrotic and fibrotic Gata1low mice and their wild-type littermates were modest. However, BM from fibrotic Gata1low mice contained higher levels of lipocalin-2, CXCL1, and TGF-β1 than wild-type BM. Although frequencies of endothelial cells, mesenchymal cells, osteoblasts, and megakaryocytes were higher than normal in Gata1low BM, the cells which expressed these cytokines the most were malignant megakaryocytes. This increased bioavailability of proinflammatory cytokines was associated with altered HSC localization: Gata1low HSC were localized in the femur diaphysis in areas surrounded by microvessels, neo-bones, and megakaryocytes, while wild-type HSC were localized in the femur epiphysis around adipocytes. In conclusion, bioavailability of inflammatory cytokines in BM, rather than blood levels, possibly by reshaping the HSC niche, correlates with myelofibrosis in Gata1low mice.
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Affiliation(s)
| | - Paola Verachi
- Department of Biomedical and Neuromotorial Sciences, Alma Mater University, 40126 Bologna, Italy; (P.V.); (F.G.); (M.M.)
| | - Francesca Gobbo
- Department of Biomedical and Neuromotorial Sciences, Alma Mater University, 40126 Bologna, Italy; (P.V.); (F.G.); (M.M.)
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy;
| | - Fabrizio Martelli
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Mario Falchi
- National Center HIV/AIDS Research, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Maria Mazzarini
- Department of Biomedical and Neuromotorial Sciences, Alma Mater University, 40126 Bologna, Italy; (P.V.); (F.G.); (M.M.)
| | - Mauro Valeri
- Center for Animal Experimentation and Well-Being, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Giuseppe Sarli
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy;
| | | | - Johanna Melo-Cardenas
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (J.M.-C.); (J.D.C.)
| | - John D. Crispino
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (J.M.-C.); (J.D.C.)
| | - Anna Rita Migliaccio
- Altius Institute for Biomedical Sciences, Seattle, WA 98121, USA
- Center for Integrated Biomedical Research, Campus Bio-Medico, 00128 Rome, Italy
- Correspondence:
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13
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Abstract
Myelofibrosis is a myeloproliferative neoplasm characterized by clonal proliferation of myeloid cells, bone marrow fibrosis and cytopenias, extramedullary hematopoiesis and hepatosplenomegaly, increased pro-inflammatory cytokine production, and systemic symptoms. Patients with MF also have a propensity toward leukemic transformation. Allogeneic hematopoietic stem cell transplantation (aHCT) is the only curative therapy for patients with MF; however, transplant-related morbidity and mortality precludes this option for the majority of patients. In the last decade, two targeted therapies have been approved for the treatment of MF, both JAK2 inhibitors, ruxolitinib and fedratinib. Despite the clinical efficacy of these two compounds in terms of splenomegaly and symptom burden reduction, there remain many areas of unmet need in the treatment of myelofibrosis. In this review, we discuss the limitations of currently approved treatment options and novel therapeutic targets with drug candidates in late-stage (phase II or III) clinical development for the treatment of MF. We delve into the mechanism of action and scientific rational of each candidate agent as well as the available clinical data, and ongoing trials that could lead to the approval of some of these novel therapies.
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Affiliation(s)
- Julian A Waksal
- Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, NY, USA
| | | | - John O Mascarenhas
- Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, NY, USA
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14
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Kiem D, Wagner S, Magnes T, Egle A, Greil R, Melchardt T. The Role of Neutrophilic Granulocytes in Philadelphia Chromosome Negative Myeloproliferative Neoplasms. Int J Mol Sci 2021; 22:ijms22179555. [PMID: 34502471 PMCID: PMC8431305 DOI: 10.3390/ijms22179555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 11/25/2022] Open
Abstract
Philadelphia chromosome negative myeloproliferative neoplasms (MPN) are composed of polycythemia vera (PV), essential thrombocytosis (ET), and primary myelofibrosis (PMF). The clinical picture is determined by constitutional symptoms and complications, including arterial and venous thromboembolic or hemorrhagic events. MPNs are characterized by mutations in JAK2, MPL, or CALR, with additional mutations leading to an expansion of myeloid cell lineages and, in PMF, to marrow fibrosis and cytopenias. Chronic inflammation impacting the initiation and expansion of disease in a major way has been described. Neutrophilic granulocytes play a major role in the pathogenesis of thromboembolic events via the secretion of inflammatory markers, as well as via interaction with thrombocytes and the endothelium. In this review, we discuss the molecular biology underlying myeloproliferative neoplasms and point out the central role of leukocytosis and, specifically, neutrophilic granulocytes in this group of disorders.
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Affiliation(s)
- Dominik Kiem
- Oncologic Center, Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Paracelsus Medical University, 5020 Salzburg, Austria; (D.K.); (S.W.); (T.M.); (A.E.); (R.G.)
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
| | - Sandro Wagner
- Oncologic Center, Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Paracelsus Medical University, 5020 Salzburg, Austria; (D.K.); (S.W.); (T.M.); (A.E.); (R.G.)
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
| | - Teresa Magnes
- Oncologic Center, Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Paracelsus Medical University, 5020 Salzburg, Austria; (D.K.); (S.W.); (T.M.); (A.E.); (R.G.)
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
| | - Alexander Egle
- Oncologic Center, Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Paracelsus Medical University, 5020 Salzburg, Austria; (D.K.); (S.W.); (T.M.); (A.E.); (R.G.)
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
- Salzburg Cancer Research Institute-Laboratory for Immunological and Molecular Cancer Research (SCRI-LIMCR), 5020 Salzburg, Austria
| | - Richard Greil
- Oncologic Center, Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Paracelsus Medical University, 5020 Salzburg, Austria; (D.K.); (S.W.); (T.M.); (A.E.); (R.G.)
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
- Salzburg Cancer Research Institute-Laboratory for Immunological and Molecular Cancer Research (SCRI-LIMCR), 5020 Salzburg, Austria
| | - Thomas Melchardt
- Oncologic Center, Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Paracelsus Medical University, 5020 Salzburg, Austria; (D.K.); (S.W.); (T.M.); (A.E.); (R.G.)
- Cancer Cluster Salzburg, 5020 Salzburg, Austria
- Salzburg Cancer Research Institute-Laboratory for Immunological and Molecular Cancer Research (SCRI-LIMCR), 5020 Salzburg, Austria
- Correspondence: ; Tel.: +43-57255-25801
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15
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Myeloproliferative Disorders and its Effect on Bone Homeostasis: The Role of Megakaryocytes. Blood 2021; 139:3127-3137. [PMID: 34428274 DOI: 10.1182/blood.2021011480] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 08/11/2021] [Indexed: 11/20/2022] Open
Abstract
Myeloproliferative Neoplasms (MPNs) are a heterogeneous group of chronic hematological diseases that arise from the clonal expansion of abnormal hematopoietic stem cells, of which Polycythemia Vera (PV), Essential Thrombocythemia (ET), and Primary Myelofibrosis (PMF) have been extensively reviewed in context of clonal expansion, fibrosis and other phenotypes. Here, we review current knowledge on the influence of different forms of MPN on bone health. Studies implicated various degrees of effect of different forms of MPN on bone density, and on osteoblast proliferation and differentiation, using murine models and human data. The majority of studies show that bone volume is generally increased in PMF patients, whereas it is slightly decreased or not altered in ET and PV patients, although possible differences between male and female phenotypes were not fully explored in most MPN forms. Osteosclerosis seen in PMF patients is a serious complication that can lead to bone marrow failure, and the loss of bone reported in some ET and PV patients can lead to osteoporotic fractures. Some MPN forms are associated with increased number of megakaryocytes (MKs), and several of the MK-associated factors in MPN are known to affect bone development. Here, we review known mechanisms involved in these processes, with focus on the role of MKs and secreted factors. Understanding MPN-associated changes in bone health could improve early intervention and treatment of this side effect of the pathology.
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16
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Jatczak-Pawlik I, Gorzkiewicz M, Studzian M, Zinke R, Appelhans D, Klajnert-Maculewicz B, Pułaski Ł. Nanoparticles for Directed Immunomodulation: Mannose-Functionalized Glycodendrimers Induce Interleukin-8 in Myeloid Cell Lines. Biomacromolecules 2021; 22:3396-3407. [PMID: 34286584 PMCID: PMC8382243 DOI: 10.1021/acs.biomac.1c00476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/06/2021] [Indexed: 12/22/2022]
Abstract
New therapeutic strategies for personalized medicine need to involve innovative pharmaceutical tools, for example, modular nanoparticles designed for direct immunomodulatory properties. We synthesized mannose-functionalized poly(propyleneimine) glycodendrimers with a novel architecture, where freely accessible mannose moieties are presented on poly(ethylene glycol)-based linkers embedded within an open-shell maltose coating. This design enhanced glycodendrimer bioactivity and led to complex functional effects in myeloid cells, with specific induction of interleukin-8 expression by mannose glycodendrimers detected in HL-60 and THP-1 cells. We concentrated on explaining the molecular mechanism of this phenomenon, which turned out to be different in both investigated cell lines: in HL-60 cells, transcriptional activation via AP-1 binding to the promoter predominated, while in THP-1 cells (which initially expressed less IL-8), induction was mediated mainly by mRNA stabilization. The success of directed immunomodulation, with synthetic design guided by assumptions about mannose-modified dendrimers as exogenous regulators of pro-inflammatory chemokine levels, opens new possibilities for designing bioactive nanoparticles.
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Affiliation(s)
- Izabela Jatczak-Pawlik
- Department
of Hypertension, Chair of Nephrology and Hypertension, Medical University of Lodz, 281/289 Rzgowska Street, Lodz 93-338, Poland
- Polish
Mother’s Memorial Hospital Research Institute (PMMHRI), 281/289 Rzgowska Street, Lodz 93-338, Poland
- Department
of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143 Pomorska Street, Lodz 90-236, Poland
| | - Michał Gorzkiewicz
- Department
of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143 Pomorska Street, Lodz 90-236, Poland
| | - Maciej Studzian
- Department
of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143 Pomorska Street, Lodz 90-236, Poland
| | - Robin Zinke
- Leibniz
Institute of Polymer Research Dresden, Hohe Straße 6, Dresden 01069, Germany
| | - Dietmar Appelhans
- Leibniz
Institute of Polymer Research Dresden, Hohe Straße 6, Dresden 01069, Germany
| | - Barbara Klajnert-Maculewicz
- Department
of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143 Pomorska Street, Lodz 90-236, Poland
| | - Łukasz Pułaski
- Department
of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143 Pomorska Street, Lodz 90-236, Poland
- Laboratory
of Transcriptional Regulation, Institute
of Medical Biology PAS, 106 Lodowa Street, Lodz 93-232, Poland
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17
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Cominal JG, Cacemiro MDC, Berzoti-Coelho MG, Pereira IEG, Frantz FG, Souto EX, Covas DT, de Figueiredo-Pontes LL, Oliveira MC, Malmegrim KCR, de Castro FA. Bone Marrow Soluble Mediator Signatures of Patients With Philadelphia Chromosome-Negative Myeloproliferative Neoplasms. Front Oncol 2021; 11:665037. [PMID: 34084749 PMCID: PMC8167065 DOI: 10.3389/fonc.2021.665037] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 04/21/2021] [Indexed: 12/18/2022] Open
Abstract
Background Essential thrombocythemia (ET), polycythemia vera (PV), and primary myelofibrosis (PMF) are clonal hematological diseases classified as Philadelphia chromosome-negative myeloproliferative neoplasms (MPN). MPN pathogenesis is associated with the presence of somatic driver mutations, bone marrow (BM) niche alterations, and tumor inflammatory status. The relevance of soluble mediators in the pathogenesis of MPN led us to analyze the levels of cytokines, chemokines, and growth factors related to inflammation, angiogenesis and hematopoiesis regulation in the BM niche of MPN patients. Methods Soluble mediator levels in BM plasma samples from 17 healthy subjects, 28 ET, 19 PV, and 16 PMF patients were determined using a multiplex assay. Soluble mediator signatures were created from categorical analyses of high mediator producers. Soluble mediator connections and the correlation between plasma levels and clinic-laboratory parameters were also analyzed. Results The soluble mediator signatures of the BM niche of PV patients revealed a highly inflammatory and pro-angiogenic milieu, with increased levels of chemokines (CCL2, CCL5, CXCL8, CXCL12, CXCL10), and growth factors (GM-CSF M-CSF, HGF, IFN-γ, IL-1β, IL-6Ra, IL-12, IL-17, IL-18, TNF-α, VEGF, and VEGF-R2). ET and PMF patients presented intermediate inflammatory and pro-angiogenic profiles. Deregulation of soluble mediators was associated with some clinic-laboratory parameters of MPN patients, including vascular events, treatment status, risk stratification of disease, hemoglobin concentration, hematocrit, and red blood cell count. Conclusions Each MPN subtype exhibits a distinct soluble mediator signature. Deregulated production of BM soluble mediators may contribute to MPN pathogenesis and BM niche modification, provides pro-tumor stimuli, and is a potential target for future therapies.
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Affiliation(s)
- Juçara Gastaldi Cominal
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Maira da Costa Cacemiro
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Maria Gabriela Berzoti-Coelho
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Illy Enne Gomes Pereira
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Fabiani Gai Frantz
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Elizabeth Xisto Souto
- Department of Clinical Hematology, Euryclides de Jesus Zerbini Transplant Hospital, São Paulo, Brazil
| | - Dimas Tadeu Covas
- Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Lorena Lobo de Figueiredo-Pontes
- Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Division of Hematology, Hemotherapy and Cellular Therapy, Department of Medical Imaging, Hematology, and Clinical Oncology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Maria Carolina Oliveira
- Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Division of Rheumatology, Allergy and Immunotherapy, Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Kelen Cristina Ribeiro Malmegrim
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Fabíola Attié de Castro
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Center for Cell-Based Therapy, Regional Blood Center of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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18
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Tamara A, Coulson DJ, Latief JS, Bakhashab S, Weaver JU. Upregulated anti-angiogenic miR-424-5p in type 1 diabetes (model of subclinical cardiovascular disease) correlates with endothelial progenitor cells, CXCR1/2 and other parameters of vascular health. Stem Cell Res Ther 2021; 12:249. [PMID: 33985567 PMCID: PMC8120744 DOI: 10.1186/s13287-021-02332-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 04/07/2021] [Indexed: 01/14/2023] Open
Abstract
Background In spite of clinical progress, cardiovascular disease (CVD) remains the predominant cause of mortality worldwide. Overexpression studies in animals have proven miR-424-5p to have anti-angiogenic properties. As type 1 diabetes mellitus (T1DM) without CVD displays endothelial dysfunction and reduced circulating endothelial progenitor cells (cEPCs), it offers a model of subclinical CVD. Therefore, we explored miR-424-5p, cytokines and vascular health in T1DM. Methods Twenty-nine well-controlled T1DM patients with no CVD and 20-matched controls were studied. Cytokines IL8, TNF-α, IL7, VEGF-C, cEPCs/CD45dimCD34+CD133+ cells and ex-vivo proangiogenic cells (PACs)/fibronectin adhesion assay (FAA) were measured. MiR-424-5p in plasma and peripheral blood mononuclear cells (PBMC) along with mRNAs in PBMC was evaluated. Results We found an elevation of IL7 (p = 0.008), IL8 (p = 0.003), TNF-α (p = 0.041), VEGF-C (p = 0.013), upregulation of mRNA CXCR1 (p = 0.009), CXCR2 (p < 0.001) and reduction of cEPCs (p < 0.001), PACs (p < 0.001) and FAA (p = 0.017) in T1DM. MiR-424-5p was upregulated in T1DM in PBMC (p < 0.001). MiR-424-5p was negatively correlated with cEPCs (p = 0.006), PACs (p = 0.005) and FAA (p < 0.001) and positively with HbA1c (p < 0.001), IL7 (p = 0.008), IL8 (p = 0.017), VEGF-C (p = 0.007), CXCR1 (p = 0.02) and CXCR2 (p = 0.001). ROC curve analyses showed (1) miR-424-5p to be a biomarker for T1DM (p < 0.001) and (2) significant upregulation of miR-424-5p, defining subclinical CVD, occurred at HbA1c of 46.5 mmol/mol (p = 0.002). Conclusion We validated animal research on anti-angiogenic properties of miR-424-5p in T1DM. MiR-424-5p may be a biomarker for onset of subclinical CVD at HbA1c of 46.5 mmol/mol (pre-diabetes). Thus, miR-424-5p has potential use for CVD monitoring whilst anti-miR-424-5p-based therapies may be used to reduce CVD morbidity/mortality in T1DM.
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Affiliation(s)
- Alice Tamara
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.,Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia
| | - David J Coulson
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
| | - Jevi Septyani Latief
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.,Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia
| | - Sherin Bakhashab
- Biochemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 80218, Saudi Arabia
| | - Jolanta U Weaver
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK. .,Department of Diabetes, Queen Elizabeth Hospital, Gateshead, Newcastle upon Tyne, NE9 6SH, UK. .,Vascular Biology and Medicine Theme, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
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19
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Abstract
Megakaryocytes give rise to platelets, which have a wide variety of functions in coagulation, immune response, inflammation, and tissue repair. Dysregulation of megakaryocytes is a key feature of in the myeloproliferative neoplasms, especially myelofibrosis. Megakaryocytes are among the main drivers of myelofibrosis by promoting myeloproliferation and bone marrow fibrosis. In vivo targeting of megakaryocytes by genetic and pharmacologic approaches ameliorates the disease, underscoring the important role of megakaryocytes in myeloproliferative neoplasms. Here we review the current knowledge of the function of megakaryocytes in the JAK2, CALR, and MPL-mutant myeloproliferative neoplasms.
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20
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Spampinato M, Giallongo C, Romano A, Longhitano L, La Spina E, Avola R, Scandura G, Dulcamare I, Bramanti V, Di Rosa M, Vicario N, Parenti R, Li Volti G, Tibullo D, Palumbo GA. Focus on Osteosclerotic Progression in Primary Myelofibrosis. Biomolecules 2021. [PMID: 33477816 DOI: 10.3390/biom11010122.pmid:33477816;pmcid:pmc7832894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
Primary myelofibrosis (PMF) is a myeloproliferative neoplasm characterized by hematopoietic stem-cell-derived clonal proliferation, leading to bone marrow (BM) fibrosis. Hematopoiesis alterations are closely associated with modifications of the BM microenvironment, characterized by defective interactions between vascular and endosteal niches. As such, neoangiogenesis, megakaryocytes hyperplasia and extensive bone marrow fibrosis, followed by osteosclerosis and bone damage, are the most relevant consequences of PMF. Moreover, bone tissue deposition, together with progressive fibrosis, represents crucial mechanisms of disabilities in patients. Although the underlying mechanisms of bone damage observed in PMF are still unclear, the involvement of cytokines, growth factors and bone marrow microenvironment resident cells have been linked to disease progression. Herein, we focused on the role of megakaryocytes and their alterations, associated with cytokines and chemokines release, in modulating functions of most of the bone marrow cell populations and in creating a complex network where impaired signaling strongly contributes to progression and disabilities.
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Affiliation(s)
- Mariarita Spampinato
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Cesarina Giallongo
- Department of Medical and Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | - Alessandra Romano
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, 95123 Catania, Italy
| | - Lucia Longhitano
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Enrico La Spina
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, 95123 Catania, Italy
| | - Roberto Avola
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Grazia Scandura
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, 95123 Catania, Italy
| | - Ilaria Dulcamare
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. "Policlinico-Vittorio Emanuele", University of Catania, 95123 Catania, Italy
| | - Vincenzo Bramanti
- Division of Clinical Pathology, "Giovanni Paolo II" Hospital-A.S.P. Ragusa, 97100 Ragusa, Italy
| | - Michelino Di Rosa
- Section of Human Anatomy and Histology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Nunzio Vicario
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Rosalba Parenti
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Giovanni Li Volti
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Daniele Tibullo
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Giuseppe A Palumbo
- Department of Medical and Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
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Spampinato M, Giallongo C, Romano A, Longhitano L, La Spina E, Avola R, Scandura G, Dulcamare I, Bramanti V, Di Rosa M, Vicario N, Parenti R, Li Volti G, Tibullo D, Palumbo GA. Focus on Osteosclerotic Progression in Primary Myelofibrosis. Biomolecules 2021; 11:biom11010122. [PMID: 33477816 PMCID: PMC7832894 DOI: 10.3390/biom11010122] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 01/09/2021] [Accepted: 01/16/2021] [Indexed: 12/22/2022] Open
Abstract
Primary myelofibrosis (PMF) is a myeloproliferative neoplasm characterized by hematopoietic stem-cell-derived clonal proliferation, leading to bone marrow (BM) fibrosis. Hematopoiesis alterations are closely associated with modifications of the BM microenvironment, characterized by defective interactions between vascular and endosteal niches. As such, neoangiogenesis, megakaryocytes hyperplasia and extensive bone marrow fibrosis, followed by osteosclerosis and bone damage, are the most relevant consequences of PMF. Moreover, bone tissue deposition, together with progressive fibrosis, represents crucial mechanisms of disabilities in patients. Although the underlying mechanisms of bone damage observed in PMF are still unclear, the involvement of cytokines, growth factors and bone marrow microenvironment resident cells have been linked to disease progression. Herein, we focused on the role of megakaryocytes and their alterations, associated with cytokines and chemokines release, in modulating functions of most of the bone marrow cell populations and in creating a complex network where impaired signaling strongly contributes to progression and disabilities.
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Affiliation(s)
- Mariarita Spampinato
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.S.); (L.L.); (R.A.); (D.T.)
| | - Cesarina Giallongo
- Department of Medical and Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, University of Catania, 95123 Catania, Italy;
| | - Alessandra Romano
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. “Policlinico-Vittorio Emanuele”, University of Catania, 95123 Catania, Italy; (A.R.); (E.L.S.); (G.S.); (I.D.)
| | - Lucia Longhitano
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.S.); (L.L.); (R.A.); (D.T.)
| | - Enrico La Spina
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. “Policlinico-Vittorio Emanuele”, University of Catania, 95123 Catania, Italy; (A.R.); (E.L.S.); (G.S.); (I.D.)
| | - Roberto Avola
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.S.); (L.L.); (R.A.); (D.T.)
| | - Grazia Scandura
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. “Policlinico-Vittorio Emanuele”, University of Catania, 95123 Catania, Italy; (A.R.); (E.L.S.); (G.S.); (I.D.)
| | - Ilaria Dulcamare
- Department of General Surgery and Medical-Surgical Specialties, Division of Hematology, A.O.U. “Policlinico-Vittorio Emanuele”, University of Catania, 95123 Catania, Italy; (A.R.); (E.L.S.); (G.S.); (I.D.)
| | - Vincenzo Bramanti
- Division of Clinical Pathology, “Giovanni Paolo II” Hospital–A.S.P. Ragusa, 97100 Ragusa, Italy;
| | - Michelino Di Rosa
- Section of Human Anatomy and Histology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy;
| | - Nunzio Vicario
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (N.V.); (R.P.)
| | - Rosalba Parenti
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (N.V.); (R.P.)
| | - Giovanni Li Volti
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.S.); (L.L.); (R.A.); (D.T.)
- Correspondence: (G.L.V.); (G.A.P.)
| | - Daniele Tibullo
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.S.); (L.L.); (R.A.); (D.T.)
| | - Giuseppe A. Palumbo
- Department of Medical and Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, University of Catania, 95123 Catania, Italy;
- Correspondence: (G.L.V.); (G.A.P.)
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22
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Bian W, Chen W, Jiang X, Qu H, Jiang J, Yang J, Liang X, Zhao B, Sun Y, Zhang C. Downregulation of Long Non-coding RNA Nuclear Paraspeckle Assembly Transcript 1 Inhibits MEG-01 Differentiation and Platelet-Like Particles Activity. Front Genet 2020; 11:571467. [PMID: 33193674 PMCID: PMC7596361 DOI: 10.3389/fgene.2020.571467] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 09/22/2020] [Indexed: 01/22/2023] Open
Abstract
Platelets are derived from megakaryocytes and play an important role in blood coagulation. By using high throughput sequencing, we have found that the long non-coding RNA (lncRNA) nuclear paraspeckle assembly transcript 1 (NEAT1) is abundant in platelets (GEO ID: 200097348). However, little is known about its role in regulating megakaryocyte differentiation and platelet activity. This study aims to clarify the effect of NEAT1 on MEG-01 differentiation and platelet-like particle (PLP) activity. NEAT1 in MEG-01 cells was knocked down by siRNA transfection. The adhesion of MEG-01 and PLP to collagen-coated coverslips was observed under a fluorescence microscope. Flow cytometry was used to investigate cell apoptosis, cell cycle, the levels of D41/CD42b on MEG-01 cells and CD62P on PLPs. Quantitative real-time polymerase chain reaction was used to detect NEAT1 and IL-8 expression levels. Western blot was used to measure the protein levels of Bcl-2, Bax, cleaved caspase-3, and IL-8. RNA-binding protein immunoprecipitation was used to detect the interaction of NEAT1 and splicing factor proline/glutamine-rich (SFPQ). Results showed that NEAT1 knockdown decreased the adhesion ability of thrombin-stimulated MEG-01 and PLP. The expression of CD62P on PLPs and CD41/CD42b on MEG-01 cells was inhibited by NEAT1 knockdown. In addition, NEAT1 knockdown inhibited cell apoptosis with increased Bcl2/Bax ratio and decreased cleaved caspase-3, and reduced the percentage of cells in the G0/G1 phase. Meanwhile, NEAT1 knockdown inhibited the expression of IL-8. A strong interaction of NEAT1 and SFPQ, a transcriptional repressor of IL-8, was identified. NEAT1 knockdown reduced the interaction between SFPQ and NEAT1.The results suggest that lncRNA NEAT1 knockdown decreases MEG-01 differentiation, PLP activity, and IL-8 level. The results also indicate that the regulation of NEAT1 on IL-8 may be realized via a direct interaction between NEAT1 and SFPQ.
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Affiliation(s)
- Weihua Bian
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Wangping Chen
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xiaoli Jiang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Huiqing Qu
- Department of Blood Transfusion, Affiliated Hospital of Binzhou Medical University, Binzhou, China
| | - Jing Jiang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Jinfu Yang
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xinyue Liang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Bingrui Zhao
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Yeying Sun
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Chunxiang Zhang
- School of Pharmacy, Binzhou Medical University, Yantai, China
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23
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Guzzi AF, Oliveira FSL, Amaro MMS, Tavares-Filho PF, Gabriel JE. In silico prediction of the functional and structural consequences of the non-synonymous single nucleotide polymorphism A122V in bovine CXC chemokine receptor type 1. BRAZ J BIOL 2020; 80:39-46. [DOI: 10.1590/1519-6984.188655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 07/17/2018] [Indexed: 02/04/2023] Open
Abstract
Abstract The current study aimed to assess whether the A122V causal polymorphism promotes alterations in the functional and structural proprieties of the CXC chemokine receptor type 1 protein (CXCR1) of cattle Bos taurus by in silico analyses. Two amino acid sequences of bovine CXCR1 was selected from database UniProtKB/Swiss-Prot: a) non-polymorphic sequence (A7KWG0) with alanine (A) at position 122, and b) polymorphic sequence harboring the A122V polymorphism, substituting alanine by valine (V) at same position. CXCR1 sequences were submitted as input to different Bioinformatics’ tools to examine the effects of this polymorphism on functional and structural stabilities, to predict eventual alterations in the 3-D structural modeling, and to estimate the quality and accuracy of the predictive models. The A122V polymorphism exerted tolerable and non-deleterious effects on the polymorphic CXCR1, and the predictive structural model for polymorphic CXCR1 revealed an alpha helix spatial structure typical of a receptor transmembrane polypeptide. Although higher variations in the distances between pairs of amino acid residues at target-positions are detected in the polymorphic CXCR1 protein, more than 97% of the amino acid residues in both models were located in favored and allowed conformational regions in Ramachandran plots. Evidences has supported that the A122V polymorphism in the CXCR1 protein is associated with increased clinical mastitis incidence in dairy cows. Thus, the findings described herein prove that the replacement of the alanine by valine amino acids provokes local conformational changes in the A122V-harboring CXCR1 protein, which could directly affect its post-translational folding mechanisms and biological functionality.
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Affiliation(s)
- A. F. Guzzi
- Universidade Federal do Vale do São Francisco, Brasil
| | | | | | | | - J. E. Gabriel
- Universidade Federal do Vale do São Francisco, Brasil
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Wang Y, Zuo X. Cytokines frequently implicated in myeloproliferative neoplasms. Cytokine X 2019; 1:100005. [PMID: 33604548 PMCID: PMC7885877 DOI: 10.1016/j.cytox.2019.100005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 03/18/2019] [Accepted: 03/19/2019] [Indexed: 12/13/2022] Open
Abstract
MPN is a chronic inflammation-driven tumor model. Many cytokines are involved in pathogenesis and progression of MPN. IL-1β, TNF-α, IL-6, IL-8, VEGF, PDGF, TGF-β and IFNs are critical in MPN. Cytokine directed therapy could be an alternative treatment for MPN in future.
Classical myeloproliferative neoplasms (MPN) include polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF). MPN has been defined as a chronic inflammation-driven tumor model. It is clear that there is a close link between chronic inflammation and MPN pathogenesis. Several studies have demonstrated cytokine profiles in MPN patients. Other studies have used cell lines or animal models aiming to clarify the underlying mechanism of cytokines in the pathogenesis of MPN. However, important questions remain: (1) among all these cytokines, which are more predictive? and (2) which are more critical? In this review, we summarize cytokines that have been investigated in MPN and highlight several cytokines that may be more significant in MPN. We suggest that cytokines are more critical in PMF than PV or ET. These cytokines include IL-1β, TNF-α, IL-6, IL-8, VEGF, PDGF, IFNs and TGF-β, all of which should be more closely investigated in MPN. Based on our extensive literature search, several key factors have emerged in our understanding of MPN: first, TNF-α could correlate with MPN progression including PMF, PV and ET. IL-1β plays a role in PMF progression, while it showed no relation with PV or ET. Second, IL-8 could be a prognostic factor for PMF, and IL-6 could be important for MPN progression. Third, VEGF and PDGF play an indirect role in MPN development and their inhibitors could be effective. Fourth, different subtypes of IFNs could have different effects in MPN. Finally, TGF-β is closely linked to MF, although the data are inconsistent. Agents that have targeted these cytokines described above are already in clinical trials, and some of them have even been used to treat MPN patients. Taken together, it will be critical to continue to investigate the precise role of these cytokines in the pathogenesis and progression of MPN.
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Affiliation(s)
- Yingying Wang
- Department of Hematology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuchang, Wuhan, Hubei 430071, PR China
| | - Xuelan Zuo
- Department of Hematology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuchang, Wuhan, Hubei 430071, PR China
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Megakaryocyte Contribution to Bone Marrow Fibrosis: many Arrows in the Quiver. Mediterr J Hematol Infect Dis 2018; 10:e2018068. [PMID: 30416700 PMCID: PMC6223581 DOI: 10.4084/mjhid.2018.068] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/23/2018] [Indexed: 01/14/2023] Open
Abstract
In Primary Myelofibrosis (PMF), megakaryocyte dysplasia/hyperplasia determines the release of inflammatory cytokines that, in turn, stimulate stromal cells and induce bone marrow fibrosis. The pathogenic mechanism and the cells responsible for progression to bone marrow fibrosis in PMF are not completely understood. This review article aims to provide an overview of the crucial role of megakaryocytes in myelofibrosis by discussing the role and the altered secretion of megakaryocyte-derived soluble factors, enzymes and extracellular matrices that are known to induce bone marrow fibrosis.
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Understanding Splenomegaly in Myelofibrosis: Association with Molecular Pathogenesis. Int J Mol Sci 2018; 19:ijms19030898. [PMID: 29562644 PMCID: PMC5877759 DOI: 10.3390/ijms19030898] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 12/31/2022] Open
Abstract
Myelofibrosis (MF) is a clinical manifestation of chronic BCR-ABL1-negative chronic myeloproliferative neoplasms. Splenomegaly is one of the major clinical manifestations of MF and is directly linked to splenic extramedullary hematopoiesis (EMH). EMH is associated with abnormal trafficking patterns of clonal hematopoietic cells due to the dysregulated bone marrow (BM) microenvironment leading to progressive splenomegaly. Several recent data have emphasized the role of several cytokines for splenic EMH. Alteration of CXCL12/CXCR4 pathway could also lead to splenic EMH by migrated clonal hematopoietic cells from BM to the spleen. Moreover, low Gata1 expression was found to be significantly associated with the EMH. Several gene mutations were found to be associated with significant splenomegaly in MF. In recent data, JAK2V617F homozygous mutation was associated with a larger spleen size. In other data, CALR mutations in MF were signigicantly associated with longer larger splenomegaly-free survivals than others. In addition, MF patients with ≥1 mutations in AZXL1, EZH1 or IDH1/2 had significantly low spleen reduction response in ruxolitinib treatment. Developments of JAK inhibitors, such as ruxolitinib, pacritinib, momelotinib, and febratinib enabled the effective management in MF patients. Especially, significant spleen reduction responses of the drugs were demonstrated in several randomized clinical studies, although those could not eradicate allele burdens of MF.
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Karshovska E, Weber C, Hundelshausen PV. Platelet chemokines in health and disease. Thromb Haemost 2017; 110:894-902. [DOI: 10.1160/th13-04-0341] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 05/17/2013] [Indexed: 12/12/2022]
Abstract
SummaryIn recent years, it has become clear that platelets and platelet-derived chemokines, beyond their role in thrombosis and haemostasis, are important mediators affecting a broad spectrum of (patho)physiological conditions. These biologically active proteins are released from α-granules upon platelet activation, most probably even during physiological conditions. In this review, we give a concise overview and an update on the current understanding of platelet-derived chemokines in a context of health and disease.Note: The review process for this manuscript was fully handled by G. Y. H. Lip, Editor in Chief.
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Cytokine Regulation of Microenvironmental Cells in Myeloproliferative Neoplasms. Mediators Inflamm 2015; 2015:869242. [PMID: 26543328 PMCID: PMC4620237 DOI: 10.1155/2015/869242] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 08/13/2015] [Indexed: 12/13/2022] Open
Abstract
The term myeloproliferative neoplasms (MPN) refers to a heterogeneous group of diseases including not only polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF), but also chronic myeloid leukemia (CML), and systemic mastocytosis (SM). Despite the clinical and biological differences between these diseases, common pathophysiological mechanisms have been identified in MPN. First, aberrant tyrosine kinase signaling due to somatic mutations in certain driver genes is common to these MPN. Second, alterations of the bone marrow microenvironment are found in all MPN types and have been implicated in the pathogenesis of the diseases. Finally, elevated levels of proinflammatory and microenvironment-regulating cytokines are commonly found in all MPN-variants. In this paper, we review the effects of MPN-related oncogenes on cytokine expression and release and describe common as well as distinct pathogenetic mechanisms underlying microenvironmental changes in various MPN. Furthermore, targeting of the microenvironment in MPN is discussed. Such novel therapies may enhance the efficacy and may overcome resistance to established tyrosine kinase inhibitor treatment in these patients. Nevertheless, additional basic studies on the complex interplay of neoplastic and stromal cells are required in order to optimize targeting strategies and to translate these concepts into clinical application.
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Hasselbalch HC. Smoking as a contributing factor for development of polycythemia vera and related neoplasms. Leuk Res 2015; 39:S0145-2126(15)30373-8. [PMID: 26463040 DOI: 10.1016/j.leukres.2015.09.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 08/29/2015] [Accepted: 09/04/2015] [Indexed: 12/17/2022]
Abstract
Smoking may be associated with accelerated erythropoiesis, leukocytosis and thrombocytosis, which are also hallmarks in patients with polycythemia vera, essential thrombocythemia and early stages of myelofibrosis (MPNs). The JAK-STAT and NF-κB signaling pathways are activated in both smokers and in patients with MPNs. Additionally, both share elevated levels of several proinflammatory cytokines, in vivo activation of leukocytes and platelets, endothelial dysfunction and increased systemic oxidative stress. Based upon experimental, epidemiological and clinical data it is herein argued and discussed, if smoking may be involved in MPN pathogenesis, considering most recent studies and reviews which are supportive of the concept that chronic inflammation with NF-κB activation and oxidative stress may have a major role - both as triggers but also as the driving force for clonal expansion in MPNs.
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Affiliation(s)
- Hans Carl Hasselbalch
- Department of Hematology, Roskilde Hospital, University of Copenhagen, Koegevej 7-13, 4000 Roskilde, Denmark.
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30
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De Soyza A, Pavord I, Elborn JS, Smith D, Wray H, Puu M, Larsson B, Stockley R. A randomised, placebo-controlled study of the CXCR2 antagonist AZD5069 in bronchiectasis. Eur Respir J 2015; 46:1021-32. [PMID: 26341987 DOI: 10.1183/13993003.00148-2015] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 05/28/2015] [Indexed: 11/05/2022]
Abstract
This randomised double-blind placebo-controlled parallel-group multicentre phase IIa study evaluated the effect of the CXCR2 antagonist AZD5069 on sputum neutrophil counts in adults with bronchiectasis.Patients were randomised 1:1 to receive AZD5069 80 mg or placebo orally twice daily for 28 days. Assessments included blood cell counts, inflammatory markers in blood, morning spontaneous sputum, lung function, safety and tolerability and patients completed daily BronkoTest diary cards. The primary outcome measure was the change in absolute sputum neutrophil count.Of 52 randomised patients, 45 completed treatment, 20 (76.9%) out of 26 receiving AZD5069 and 25 (96.2%) out of 26 receiving placebo. AZD5069 reduced the absolute neutrophil cell count in morning sputum by 69% versus placebo (p=0.004); percentage sputum neutrophil count was reduced by 36% (p=0.008). The number of infections/exacerbations was similar with AZD5069 and placebo (nine versus eight), but these led to more study discontinuations with AZD5069 (four versus zero). Sputum interleukin (IL)-6 and growth-regulated oncogene (GRO)-α and serum GRO-α, IL-1ß and IL-8 levels increased with AZD5069 versus placebo (all p<0.001), while serum high-sensitivity C-reactive protein levels did not change. AZD5069 was well tolerated.AZD5069 markedly reduced absolute sputum neutrophil counts in bronchiectasis patients, although this was not associated with improvements in clinical outcomes in this exploratory study.
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Affiliation(s)
- Anthony De Soyza
- Institute of Cellular Medicine, Newcastle University and Freeman Hospital, Sir William Leech Research Centre, Respiratory Department, Newcastle upon Tyne, UK
| | - Ian Pavord
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - J Stuart Elborn
- Centre for Infection and Immunity, Queens University, Belfast, UK
| | - David Smith
- Respiratory Research Unit, Southmead Hospital, Bristol, UK
| | - Heather Wray
- Innovative Medicines, Respiratory, Inflammation and Autoimmunity (iMED RIA), AstraZeneca R&D, Mölndal, Sweden
| | - Margareta Puu
- Innovative Medicines, Respiratory, Inflammation and Autoimmunity (iMED RIA), AstraZeneca R&D, Mölndal, Sweden
| | - Bengt Larsson
- Innovative Medicines, Respiratory, Inflammation and Autoimmunity (iMED RIA), AstraZeneca R&D, Mölndal, Sweden
| | - Robert Stockley
- Respiratory Department, Queen Elizabeth Hospital, Birmingham, UK
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Cox R, Phillips O, Fukumoto J, Fukumoto I, Tamarapu Parthasarathy P, Mandry M, Cho Y, Lockey R, Kolliputi N. Resolvins Decrease Oxidative Stress Mediated Macrophage and Epithelial Cell Interaction through Decreased Cytokine Secretion. PLoS One 2015; 10:e0136755. [PMID: 26317859 PMCID: PMC4552682 DOI: 10.1371/journal.pone.0136755] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 08/07/2015] [Indexed: 01/08/2023] Open
Abstract
Background Inflammation is a key hallmark of ALI and is mediated through ungoverned cytokine signaling. One such cytokine, interleukin-1beta (IL-1β) has been demonstrated to be the most bioactive cytokine in ALI patients. Macrophages are the key players responsible for IL-1β secretion into the alveolar space. Following the binding of IL-1β to its receptor, “activated” alveolar epithelial cells show enhanced barrier dysfunction, adhesion molecule expression, cytokine secretion, and leukocyte attachment. More importantly, it is an important communication molecule between the macrophage and alveolar epithelium. While the molecular determinants of this inflammatory event have been well documented, endogenous resolution processes that decrease IL-1β secretion and resolve alveolar epithelial cell activation and tissue inflammation have not been well characterized. Lipid mediator Aspirin-Triggered Resolvin D1 (AT-RvD1) has demonstrated potent pro-resolutionary effects in vivo models of lung injury; however, the contribution of the alveoli to the protective benefits of this molecule has not been well documented. In this study, we demonstrate that AT-RvD1 treatment lead to a significant decrease in oxidant induced macrophage IL-1β secretion and production, IL-1β-mediated cytokine secretion, adhesion molecule expression, leukocyte adhesion and inflammatory signaling. Methods THP-1 macrophages were treated with hydrogen peroxide and extracellular ATP in the presence or absence of AT-RvD1 (1000–0.1 nM). A549 alveolar-like epithelial cells were treated with IL-1β (10 ng/mL) in the presence or absence of AT-RvD1 (0.1 μM). Following treatment, cell lysate and cell culture supernatants were collected for Western blot, qPCR and ELISA analysis of pro-inflammatory molecules. Functional consequences of IL-1β induced alveolar epithelial cell and macrophage activation were also measured following treatment with IL-1β ± AT-RvD1. Results Results demonstrate that macrophages exposed to H2O2 and ATP in the presence of resolvins show decreased IL-1β production and activity. A549 cells treated with IL-1β in the presence of AT-RvD1 show a reduced level of proinflammatory cytokines IL-6 and IL-8. Further, IL-1β-mediated adhesion molecule expression was also reduced with AT-RvD1 treatment, which was correlated with decreased leukocyte adhesion. AT-RvD1 treatment demonstrated reduced MAP-Kinase signaling. Taken together, our results demonstrate AT-RvD1 treatment reduced IL-1β-mediated alveolar epithelial cell activation. This is a key step in unraveling the protective effects of resolvins, especially AT-RvD1, during injury.
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Affiliation(s)
- Ruan Cox
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Oluwakemi Phillips
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Jutaro Fukumoto
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Itsuko Fukumoto
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Prasanna Tamarapu Parthasarathy
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Maria Mandry
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Young Cho
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Richard Lockey
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Narasaiah Kolliputi
- Department of Internal Medicine, Division of Allergy and Immunology, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- * E-mail:
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Role of chemokine receptors CXCR4 and CXCR7 for platelet function. Biochem Soc Trans 2015; 43:720-6. [PMID: 26551719 DOI: 10.1042/bst20150113] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Indexed: 02/07/2023]
Abstract
Platelet-derived SDF-1α (stromal cell derived factor-α) mediates inflammation, immune defence and repair mechanisms at site of tissue injury. This review summarizes the relative expression of CXC chemokine receptor 4 (CXCR4) and CXCR7 in platelets, their dynamic trafficking in presence of ligands like chemokine C-X-C-motif ligand 11 (CXCL11), CXCL12 and MIF (macrophage migration inhibitory factor); how these receptors differentially mediate the functional and survival response to the chemokines CXCL11, CXCL12 and MIF. We further elaborate and emphasize the prognostic significance of platelet surface expression of CXCR4-CXCR7 in the context of coronary artery disease (CAD). SDF-1α/CXCL12, CXCL11, MIF effects mediated through CXCR4 and CXCR7 may play a regulatory role at the site of vascular and tissue inflammation, immune defence and repair where activated platelets reach as forerunners and function as critical players.
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CXCR2 expression and postoperative complications affect long-term survival in patients with esophageal cancer. World J Surg Oncol 2015; 13:232. [PMID: 26231560 PMCID: PMC4522106 DOI: 10.1186/s12957-015-0658-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 07/20/2015] [Indexed: 12/25/2022] Open
Abstract
Background Esophagectomy is one of the most invasive surgical treatments for digestive tract cancer, and the blood levels of inflammatory cytokines such as interleukin-1, interleukin-6, and interleukin-8 are increased for several hours after surgery or in patients experiencing postoperative complications. CXCR2, an interleukin-8 receptor, is reportedly expressed in several carcinomas, and interleukin-8 signaling promotes cancer cell proliferation. The impact of postoperative complications following esophagectomy on long-term survival is controversial. In this study, we demonstrate the significance of CXCR2 expression and validate the effects of CXCR2 expression and postoperative complications on long-term prognosis of esophageal squamous cell carcinoma using resected specimens. Methods Eighty-two specimens were sectioned from archived, paraffin-embedded tumor tissues obtained from patients with esophageal squamous cell carcinoma who underwent esophagectomy and extended lymphadenectomy for complete resection of cancer in our institute between 1997 and 2002. Immunohistochemistry was performed using a polyclonal antibody to CXCR2, and the correlation of stainability with clinicopathological factors and long-term survival was examined. Results CXCR2 was expressed in 33 of 82 (40.2 %) specimens. In the CXCR2-positive group, the recurrence-free survival and overall survival rates of patients who developed postoperative complications were both significantly lower than those for patients who did not develop any complications. In contrast, in the CXCR2-negative group, there was no significant difference in long-term prognosis between patients with and without complications. CXCR2 positivity combined with postoperative complications was an independent risk factor for subsequent tumor recurrence, showing the highest hazard ratio. Conclusions Our results suggest that the patients with CXCR2-positive esophageal cancer who develop postoperative complications have a poor prognosis and should be carefully followed. Trial registration This study was approved by Keio University School of Medicine Ethics Committee with a trial registration number of 2011-241.
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Analysis of a Panel of 48 Cytokines in BAL Fluids Specifically Identifies IL-8 Levels as the Only Cytokine that Distinguishes Controlled Asthma from Uncontrolled Asthma, and Correlates Inversely with FEV1. PLoS One 2015; 10:e0126035. [PMID: 26011707 PMCID: PMC4444276 DOI: 10.1371/journal.pone.0126035] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 03/27/2015] [Indexed: 01/09/2023] Open
Abstract
We sought to identify cells and cytokines in bronchoalveolar lavage (BAL) fluids that distinguish asthma from healthy control subjects and those that distinguish controlled asthma from uncontrolled asthma. Following informed consent, 36 human subjects were recruited for this study. These included 11 healthy control subjects, 15 subjects with controlled asthma with FEV1≥80% predicted and 10 subjects with uncontrolled asthma with FEV1 <80% predicted. BAL fluid was obtained from all subjects. The numbers of different cell types and the levels of 48 cytokines were measured in these fluids. Compared to healthy control subjects, patients with asthma had significantly more percentages of eosinophils and neutrophils, IL-1RA, IL-1α, IL-1β, IL-2Rα, IL-5, IL-6, IL-7, IL-8, G-CSF, GROα (CXCL1), MIP-1β (CCL4), MIG (CXCL9), RANTES (CCL5) and TRAIL in their BAL fluids. The only inflammatory markers that distinguished controlled asthma from uncontrolled asthma were neutrophil percentage and IL-8 levels, and both were inversely correlated with FEV1. We examined whether grouping asthma subjects on the basis of BAL eosinophil % or neutrophil % could identify specific cytokine profiles. The only differences between neutrophil-normal asthma (neutrophil≤2.4%) and neutrophil-high asthma (neutrophils%>2.4%) were a higher BAL fluid IL-8 levels, and a lower FEV1 in the latter group. By contrast, compared to eosinophil-normal asthma (eosinophils≤0.3%), eosinophil-high asthma (eosinophils>0.3%) had higher levels of IL-5, IL-13, IL-16, and PDGF-bb, but same neutrophil percentage, IL-8, and FEV1. Our results identify neutrophils and IL-8 are the only inflammatory components in BAL fluids that distinguish controlled asthma from uncontrolled asthma, and both correlate inversely with FEV1.
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IL8-CXCR2 pathway inhibition as a therapeutic strategy against MDS and AML stem cells. Blood 2015; 125:3144-52. [PMID: 25810490 DOI: 10.1182/blood-2015-01-621631] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 03/15/2015] [Indexed: 12/16/2022] Open
Abstract
Acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) are associated with disease-initiating stem cells that are not eliminated by conventional therapies. Novel therapeutic targets against preleukemic stem cells need to be identified for potentially curative strategies. We conducted parallel transcriptional analysis of highly fractionated stem and progenitor populations in MDS, AML, and control samples and found interleukin 8 (IL8) to be consistently overexpressed in patient samples. The receptor for IL8, CXCR2, was also significantly increased in MDS CD34(+) cells from a large clinical cohort and was predictive of increased transfusion dependence. High CXCR2 expression was also an adverse prognostic factor in The Cancer Genome Atlas AML cohort, further pointing to the critical role of the IL8-CXCR2 axis in AML/MDS. Functionally, CXCR2 inhibition by knockdown and pharmacologic approaches led to a significant reduction in proliferation in several leukemic cell lines and primary MDS/AML samples via induction of G0/G1 cell cycle arrest. Importantly, inhibition of CXCR2 selectively inhibited immature hematopoietic stem cells from MDS/AML samples without an effect on healthy controls. CXCR2 knockdown also impaired leukemic growth in vivo. Together, these studies demonstrate that the IL8 receptor CXCR2 is an adverse prognostic factor in MDS/AML and is a potential therapeutic target against immature leukemic stem cell-enriched cell fractions in MDS and AML.
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LeVine DN, Birkenheuer AJ, Brooks MB, Nordone SK, Bellinger DA, Jones SL, Fischer TH, Oglesbee SE, Frey K, Brinson NS, Peters AP, Marr HS, Motsinger-Reif A, Gudbrandsdottir S, Bussel JB, Key NS. A novel canine model of immune thrombocytopenia: has immune thrombocytopenia (ITP) gone to the dogs? Br J Haematol 2014; 167:110-20. [PMID: 25039744 DOI: 10.1111/bjh.13005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 05/11/2014] [Indexed: 01/25/2023]
Abstract
Canine immune thrombocytopenia (ITP) is analogous to human ITP, with similar platelet counts and heterogeneity in bleeding phenotype among affected individuals. With a goal of ultimately investigating this bleeding heterogeneity, a canine model of antibody-mediated ITP was developed. Infusion of healthy dogs with 2F9, a murine IgG2a monoclonal antibody to the canine platelet glycoprotein GPIIb (a common target of autoantibodies in ITP) resulted in profound, dose-dependent thrombocytopenia. Model dogs developed variable bleeding phenotypes, e.g. petechiae and haematuria, despite similar degrees of thrombocytopenia. 2F9 infusion was not associated with systemic inflammation, consumptive coagulopathy, or impairment of platelet function. Unexpectedly however, evaluation of cytokine profiles led to the identification of platelets as a potential source of serum interleukin-8 (IL8) in dogs. This finding was confirmed in humans with ITP, suggesting that platelet IL8 may be a previously unrecognized modulator of platelet-neutrophil crosstalk. The utility of this model will allow future study of bleeding phenotypic heterogeneity including the role of neutrophils and endothelial cells in ITP.
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Affiliation(s)
- Dana N LeVine
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA; Department of Pathology and Laboratory Animal Medicine, University of North Carolina, Chapel Hill, NC, USA
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Berenjian S, Hu K, Abedi-Valugerdi M, Hassan M, Bashir Hassan S, Morein B. The nanoparticulate Quillaja saponin KGI exerts anti-proliferative effects by down-regulation of cell cycle molecules in U937 and HL-60 human leukemia cells. Leuk Lymphoma 2013; 55:1618-24. [PMID: 24138332 DOI: 10.3109/10428194.2013.853301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cancer cells are characterized by uncontrolled replication involving loss of control of cyclin dependent kinases (CDKs) and cyclins, and by abolished differentiation. In this study we introduce KGI, which is a nanoparticle with a Quillaja saponin as an active molecule. By the use of RNA array analysis and confirmation at the protein level, we show that KGI affects myeloid leukemia cells (in particular, the U937 monoblast cancer cell) by the following mechanisms: (A) ceasing cell replication via proteasome degradation, (B) down-regulation of key molecules at check points between G1/S and G2/M phases, (C) reduction of thymidine kinase activity, followed by (D) exit to differentiation and production of interleukin-8 (IL-8), eventually leading to apoptosis. Leukemia cell lines (U937 and HL-60 cells) were exposed to KGI for 8 h, after which the drug was removed. The cancer cells did not revert to replication over the following 10 days. Thus our findings suggest that the nanoparticle KGI inhibits proliferation and promotes differentiation in leukemic cells by interfering with the cell cycle process.
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Barcellini W, Iurlo A, Radice T, Imperiali FG, Zaninoni A, Fattizzo B, Guidotti F, Bianchi P, Fermo E, Consonni D, Cortelezzi A. Increased prevalence of autoimmune phenomena in myelofibrosis: relationship with clinical and morphological characteristics, and with immunoregulatory cytokine patterns. Leuk Res 2013; 37:1509-15. [PMID: 24080022 DOI: 10.1016/j.leukres.2013.09.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 08/29/2013] [Accepted: 09/01/2013] [Indexed: 10/26/2022]
Abstract
Autoimmune phenomena and cytokines were investigated in 100 patients with myelofibrosis (MF) and related to marrow fibrosis and clinical risk. Anti-erythrocyte antibodies by mitogen-stimulated direct antiglobulin test (MS-DAT) were positive in 45%, anti-platelets in 15% and organ/non organ-specific in 57% of cases, without clinically overt disease, and mostly in low-risk/intermediate-risk-1 and MF-0/MF-1. TGF-β and IL-8 were increased in MS-DAT positive cases, and IFN-γ in patients with serological autoantibodies. TGF-β and IL-17 were elevated in early clinical and morphological stages, while IL-8 increased in advanced stages. These data suggest that autoimmune phenomena and cytokine disregulation are particularly relevant in early MF.
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Affiliation(s)
- Wilma Barcellini
- U.O. Ematologia e Centro Trapianti di Midollo, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy.
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Ogura M, Takeuchi H, Kawakubo H, Nishi T, Fukuda K, Nakamura R, Takahashi T, Wada N, Saikawa Y, Omori T, Miyasho T, Yamada S, Kitagawa Y. Clinical significance of CXCL-8/CXCR-2 network in esophageal squamous cell carcinoma. Surgery 2013; 154:512-20. [DOI: 10.1016/j.surg.2013.06.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 06/21/2013] [Indexed: 10/26/2022]
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Raynaud CM, Butler JM, Halabi NM, Ahmad FS, Ahmed B, Rafii S, Rafii A. Endothelial cells provide a niche for placental hematopoietic stem/progenitor cell expansion through broad transcriptomic modification. Stem Cell Res 2013; 11:1074-90. [PMID: 23978474 DOI: 10.1016/j.scr.2013.07.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 07/17/2013] [Accepted: 07/31/2013] [Indexed: 11/26/2022] Open
Abstract
Umbilical cord blood (UCB) is an attractive source of hematopoietic stem cells (HSCs). However, the number of HSCs in UCB is limited, and attempts to amplify them in vitro remain inefficient. Several publications have documented amplification of hematopoietic stem/progenitor cells (HSPCs) on endothelial or mesenchymal cells, but the lack of homogeneity in culture conditions and HSC definition impairs direct comparison of these results. We investigated the ability of different feeder layers, mesenchymal progenitors (MPs) and endothelial cells (ECs), to amplify hematopoietic stem/progenitor cells. Placental derived HSPCs (defined as Lin(-)CD45(-/dim)CD34(+)CD38(-)CD90(+)) were maintained on confluent feeder layers and the number of cells and their marker expression were monitored over 21 days. Although both types of feeder layers supported hematopoietic expansion, only endothelial cells triggered amplification of Lin(-)CD45(-/dim)CD34(+)CD38(-)CD90(+) cells, which peaked at 14 days. The amplified cells differentiated into all cell lineages, as attested by in vitro colony-forming assays, and were capable of engraftment and multi-lineage differentiation in sub-lethally irradiated mice. Mesenchymal progenitors promoted amplification of CD38(+) cells, previously defined as precursors with more limited differentiation potential. A competitive assay demonstrated that hematopoietic stem/progenitor cells had a preference for interacting with endothelial cells in vitro. Cytokine and transcriptomic analysis of both feeder cell types identified differences in gene expression that correlated with propensity of ECs and MPs to support hematopoietic cell amplification and differentiation respectively. Finally, we used RNA sequencing of endothelial cells and HSPCs to uncover relevant networks illustrating the complex interaction between endothelial cells and HSPCs leading to stem/progenitor cell expansion.
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Affiliation(s)
- Christophe M Raynaud
- Qatar Cardiovascular Research Center, Qatar Foundation, Qatar Science and Technology Park, Doha, Qatar
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Wehrle J, Seeger TS, Schwemmers S, Pfeifer D, Bulashevska A, Pahl HL. Transcription factor nuclear factor erythroid-2 mediates expression of the cytokine interleukin 8, a known predictor of inferior outcome in patients with myeloproliferative neoplasms. Haematologica 2013; 98:1073-80. [PMID: 23445878 DOI: 10.3324/haematol.2012.071183] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The transcription factor nuclear factor erythroid-2 is over-expressed in patients with myeloproliferative neoplasms irrespective of the presence of the JAK2(V617F) mutation. Our transgenic mouse model over-expressing nuclear factor erythroid-2, which recapitulates many features of myeloproliferative neoplasms including transformation to acute myeloid leukemia, clearly implicates this transcription factor in the pathophysiology of myeloproliferative neoplasms. Because the targets mediating nuclear factor erythroid-2 effects are not well characterized, we conducted microarray analysis of CD34(+) cells lentivirally transduced to over-express nuclear factor erythroid-2 or to silence this transcription factor via shRNA, in order to identify novel target genes. Here, we report that the cytokine interleukin 8 is a novel target gene. Nuclear factor erythroid-2 directly binds the interleukin 8 promoter in vivo, and these binding sites are required for promoter activity. Serum levels of interleukin 8 are known to be elevated in both polycythemia vera and primary myelofibrosis patients. Recently, increased interleukin 8 levels have been shown to be predictive of inferior survival in primary myelofibrosis patients in multivariate analysis. Therefore, one of the mechanisms by which nuclear factor erythroid-2 contributes to myeloproliferative neoplasm pathology may be increased interleukin 8 expression.
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Affiliation(s)
- Julius Wehrle
- Department of Hematology/Oncology, Center for Clinical Research, University Hospital Freiburg, Freiburg, Germany
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Santos FPS, Verstovsek S. Therapy with JAK2 inhibitors for myeloproliferative neoplasms. Hematol Oncol Clin North Am 2012; 26:1083-99. [PMID: 23009939 DOI: 10.1016/j.hoc.2012.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The development of JAK2 inhibitors followed the discovery of activating mutation of JAK2 (JAK2V617F) in patients with classic Philadelphia-negative myeloproliferative neoplasms (Ph-negative MPN). It is now known that mutations activating the JAK-STAT pathway are ubiquitous in Ph-negative MPN, and that the deregulated JAK-STAT pathway plays a central role in the pathogenesis of these disorders. JAK2 inhibitors thus are effective in patients both with and without the JAK2V617F mutation. This article reviews the rationale for using JAK2 inhibitors in Ph-negative MPN, and the results of more recent clinical trials with these drugs.
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Affiliation(s)
- Fabio P S Santos
- Hematology and Oncology Center, Hospital Israelita Albert Einstein, Avenida Albert Einstein, 627/701, Building A, Sao Paulo, SP 05651-901, Brazil
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Le Bousse-Kerdilès MC. Primary myelofibrosis and the "bad seeds in bad soil" concept. FIBROGENESIS & TISSUE REPAIR 2012; 5:S20. [PMID: 23259918 PMCID: PMC3368798 DOI: 10.1186/1755-1536-5-s1-s20] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Primary Myelofibrosis (PMF) is a chronic myeloproliferative neoplasm characterized by a clonal myeloproliferation and a myelofibrosis. The concomitant presence of neoangiogenesis and osteosclerosis suggests a deregulation of medullar stem cell niches in which hematopoietic stem cells are engaged in a constant crosstalk with their stromal environment. Despite the recently discovered mutations including the JAK2Val617F mutation, the primitive molecular event responsible for the clonal hematopoietic proliferation is still unknown. We propose that the "specificity" of the pathological process that caracterizes PMF results from alterations in the cross talk between hematopoietic and stromal cells. These alterations contribute in creating a abnormal microenvironment that participates in the maintenance of the neoplasic clone leading to a misbalance disfavouring normal hematopoiesis; in return or simultaneously, stromal cells constituting the niches are modulated by hematopoietic cells resulting in stroma dysfunctions. Therefore, PMF is a remarkable "model" in which deregulation of the stem cell niche is of utmost importance for the disease development. A better understanding of the crosstalk between stem cells and their niches should imply new therapeutic strategies targeting not only intrinsic defects in stem cells but also regulatory niche-derived signals and, consequently, hematopoietic cell proliferation.
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Affiliation(s)
- Marie-Caroline Le Bousse-Kerdilès
- The French INSERM and the European EUMNET networks on Myelofibrosis, The French Intergroup of Myeloproliferative disorders (FIM), INSERM U972, Paris XI University, Laboratory of Hematology, Paul Brousse Hospital, 14, av. Paul-Vaillant Couturier ; 948007, Villejuif Cedex, France
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Jaimes Y, Gras C, Goudeva L, Buchholz S, Eiz-Vesper B, Seltsam A, Immenschuh S, Blasczyk R, Figueiredo C. Semaphorin 7A inhibits platelet production from CD34+ progenitor cells. J Thromb Haemost 2012; 10:1100-8. [PMID: 22448926 DOI: 10.1111/j.1538-7836.2012.04708.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND The multifunctional protein semaphorin 7A (Sema7A) may have regulatory effects on blood cell differentiation via its receptors β1-integrin and plexin C1. As thrombocytopenia can be treated with transfusion of ex vivo CD34(+) cell-derived megakaryocytes, we investigated the effect of Sema7A on differentiation of CD34(+) progenitor cells into megakaryocytes and platelets. METHODS Megakaryocytes and platelets were differentiated with a specific cytokine cocktail (CC) from CD34(+) progenitor cells in the presence or absence of Sema7A. Expression of cell markers CD41, CD42a and CD61 or detection of the activation of the signal mediator focal adhesion kinase (FAK) was performed by flow cytometry, cytokine secretion by Luminex technology, and megakaryocyte cell density and morphology by microscopic studies. Sema7A levels in vivo were assessed by real-time PCR and ELISA in hematological patients undergoing chemotherapy. RESULTS CD34(+) progenitor cells expressed the receptors for Sema7A. Expression of CD41, CD42a and CD61 was markedly reduced in the presence of Sema7A, after CC-dependent platelet production from CD34(+) progenitor cells. As revealed by microscopic analysis, megakaryocyte cell density was significantly lower in the presence of Sema7A as compared with controls. Blocking of CD29 abrogated the Sema7A-mediated inhibition. Sema7A activated FAK in CD34(+) progenitor cells and significantly increased secretion of the proinflammatory cytokines IL-6, IL-8 and GM-CSF. Finally, Sema7A levels were up-regulated in 50% of patients after chemotherapy. CONCLUSIONS Sema7A markedly reduces the production rates of megakaryocytes and platelets from CD34(+) progenitor cells. Hence, up-regulation of Sema7A may be a major risk factor for a reduced platelet repopulation after hematopoietic stem cell transplantation.
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Affiliation(s)
- Y Jaimes
- Institute for Transfusion Medicine, Hanover Medical School, Hanover, Germany
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Tabata R, Tabata C, Nagai T, Yasumizu R. Follicular lymphoma with prominent fibrosis complicated by peripheral eosinophilia. Ann Hematol 2011; 91:965-7. [DOI: 10.1007/s00277-011-1342-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Accepted: 09/01/2011] [Indexed: 10/17/2022]
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Effects of CXCR1 and CXCR2 inhibition on expansion and differentiation of umbilical cord blood CD133+ cells into megakaryocyte progenitor cells. Cytokine 2011; 55:181-7. [DOI: 10.1016/j.cyto.2011.04.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 03/07/2011] [Accepted: 04/20/2011] [Indexed: 11/19/2022]
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Zimmermann HW, Seidler S, Gassler N, Nattermann J, Luedde T, Trautwein C, Tacke F. Interleukin-8 is activated in patients with chronic liver diseases and associated with hepatic macrophage accumulation in human liver fibrosis. PLoS One 2011; 6:e21381. [PMID: 21731723 PMCID: PMC3120868 DOI: 10.1371/journal.pone.0021381] [Citation(s) in RCA: 192] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 05/29/2011] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Interleukin-8 (IL-8, CXCL8) is a potent chemoattractant for neutrophils and contributes to acute liver inflammation. Much less is known about IL-8 in chronic liver diseases (CLD), but elevated levels were reported from alcoholic and hepatitis C-related CLD. We investigated the regulation of IL-8, its receptors CXCR1 and CXCR2 and possible IL-8 responding cells in CLD patients. METHODOLOGY Serum IL-8 levels were measured in CLD patients (n = 200) and healthy controls (n = 141). Intrahepatic IL-8, CXCR1 and CXCR2 gene expression was quantified from liver samples (n = 41), alongside immunohistochemical neutrophil (MPO) and macrophage (CD68) stainings. CXCR1 and CXCR2 expression was analyzed on purified monocytes from patients (n = 111) and controls (n = 31). In vitro analyses explored IL-8 secretion by different leukocyte subsets. PRINCIPAL FINDINGS IL-8 serum levels were significantly increased in CLD patients, especially in end-stage cirrhosis. Interestingly, patients with cholestatic diseases exhibited highest IL-8 serum concentrations. IL-8 correlated with liver function, inflammatory cytokines and non-invasive fibrosis markers. Intrahepatically, IL-8 and CXCR1 expression were strongly up-regulated. However, intrahepatic IL-8 could only be associated to neutrophil infiltration in patients with primary biliary cirrhosis (PBC). In non-cholestatic cirrhosis, increased IL-8 and CXCR1 levels were associated with hepatic macrophage accumulation. In line, CXCR1, but not CXCR2 or CXCR3, expression was increased on circulating monocytes from cirrhotic patients. Moreover, monocyte-derived macrophages from CLD patients, especially the non-classical CD16⁺ subtype, displayed enhanced IL-8 secretion in vitro. CONCLUSIONS IL-8 is strongly activated in CLD, thus likely contributing to hepatic inflammation. Our study suggests a novel role of IL-8 for recruitment and activation of hepatic macrophages via CXCR1 in human liver cirrhosis.
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Affiliation(s)
| | | | | | | | - Tom Luedde
- Department of Medicine III, University Hospital, Aachen, Germany
| | | | - Frank Tacke
- Department of Medicine III, University Hospital, Aachen, Germany
- * E-mail:
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Santos FPS, Verstovsek S. JAK2 inhibitors: are they the solution? CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2011; 11 Suppl 1:S28-36. [PMID: 22035745 DOI: 10.1016/j.clml.2011.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 02/07/2011] [Indexed: 01/17/2023]
Abstract
The discovery of the JAK2V617F mutation in patients with Philadelphia-negative myeloproliferative neoplasms (Ph-negative MPN) started the era of targeted therapy for these diseases. Until now, patients had few treatment options available, which usually were restricted to hydroxyurea, interferon preparations, and chemotherapy in more aggressive cases. JAK2 inhibitors have been developed over the past 5 years, and the results of the first clinical trials with JAK2 inhibitors for patients with myelofibrosis were recently published. Current research results suggest that JAK2 inhibitors have a potential to decrease disease burden and its activity, as manifested by a decrease in splenomegaly and improvement in systemic disease-related symptoms, but they do not seem to be able to eradicate the malignant clone. However, JAK2 inhibitors help patients regardless of their mutation status, because patients without JAK2V617F mutation benefit to the same extent as patients with JAK2V617F mutation. A greater understanding of the pathophysiology of MPNs is needed before we can cure myelofibrosis with drug therapy. Currently, several new JAK2 inhibitors are in clinical trials for patients with myelofibrosis, and clinical trials for patients with polycythemia vera and essential thrombocythemia have also started. We review recent data on JAK2 inhibitors for the management of patients with Ph-negative MPNs.
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Affiliation(s)
- Fabio P S Santos
- Hematology Program, Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
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D'Atri LP, Pozner RG, Nahmod KA, Landoni VI, Isturiz M, Negrotto S, Schattner M. Paracrine regulation of megakaryo/thrombopoiesis by macrophages. Exp Hematol 2011; 39:763-72. [PMID: 21549176 DOI: 10.1016/j.exphem.2011.03.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 03/11/2011] [Accepted: 03/30/2011] [Indexed: 01/04/2023]
Abstract
OBJECTIVE Megakaryo/thrombopoiesis is a complex process regulated by multiple signals provided by the bone marrow microenvironment. Because macrophages are relevant components of the bone marrow stroma and their activation induces an upregulation of molecules that can regulate hematopoiesis, we analyzed the impact of these cells on the control of megakaryocyte development and platelet biogenesis. MATERIALS AND METHODS The different stages of megakaryo/thrombopoiesis were analyzed by flow cytometry using an in vitro model of human cord blood CD34(+) cells stimulated with thrombopoietin in either a transwell system or conditioned media from monocyte-derived macrophages isolated from peripheral blood. Cytokines secreted from macrophages were characterized by protein array and enzyme-linked immunosorbent assay. RESULTS Resting macrophages released soluble factors that promoted megakaryocyte growth, cell ploidy, a size increase, proplatelet production, and platelet release. Lipopolysaccharide stimulation triggered the secretion of cytokines that exerted opposite effects together with a dramatic switch of CD34(+) commitment to the megakaryocytic lineage toward the myeloid lineage. Neutralization of interleukin-8 released by stimulated macrophages partially reversed the inhibition of megakaryocyte growth. Activation of nuclear factor κB had a major role in the synthesis of molecules involved in the megakaryocyte inhibition mediated by lipopolysaccharide-stimulated macrophages. CONCLUSIONS Our study extends our understanding about the role of the bone marrow microenvironment in the regulation of megakaryo/thrombopoiesis by showing that soluble factors derived from macrophages positively or negatively control megakaryocyte growth, differentiation, maturation, and their ability to produce platelets.
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Affiliation(s)
- Lina Paola D'Atri
- Thrombosis I Laboratory, Hematological Research Institute Mariano R Castex, National Academy of Medicine, CONICET, Buenos Aires, Argentina
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