1
|
Wu J, Ma L, Gong Q, Chen Y, Chen L, Shi C. NEAR-INFRARED DYE IR-780 ALLEVIATES HEMATOPOIETIC SYSTEM DAMAGE BY PROMOTING HEMATOPOIETIC STEM CELLS INTO QUIESCENCE. Shock 2024; 61:442-453. [PMID: 38411611 DOI: 10.1097/shk.0000000000002317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
ABSTRACT Potential radiation exposure is a general concern, but there still lacks radioprotective countermeasures. Here, we found a small molecular near-infrared dye IR-780, which promoted hematopoietic stem cells (HSCs) into quiescence to resist stress. When mice were treated with IR-780 before stress, increased HSC quiescence and better hematopoietic recovery were observed in mice in stress conditions. However, when given after radiation, IR-780 did not show obvious benefit. Transplantation assay and colony-forming assay were carried out to determine self-renewal ability and repopulation capacity of HSCs. Furthermore, IR-780 pretreatment reduced the generation of reactive oxygen species (ROS) and DNA damage in HSCs after radiation. In homeostasis, the percentage of Lineage - , Sca-1 + , and c-Kit + cells and long-term HSCs (LT-HSCs) were improved, and more HSCs were in G0 state after administration of IR-780. Further investigations showed that IR-780 selectively accumulated in mitochondria membrane potential high LT-HSCs (MMP-high LT-HSCs). Finally, IR-780 promoted human CD34 + HSC reconstruction ability in NOD-Prkdc scid Il2rg null mice after transplantation and improved repopulation capacity in vitro culture. Our research showed that IR-780 selectively entered MMP-high LT-HSCs and promoted them into dormancy, thus reducing hematopoietic injury and improving regeneration capacity. This novel approach might hold promise as a potential countermeasure for radiation injury.
Collapse
Affiliation(s)
- Jie Wu
- Institute of Rocket Force Medicine, State Key of Trauma and Chemical Poisoning Third Military Medical University (Army Medical University), Chongqing, China
| | - Le Ma
- Institute of Rocket Force Medicine, State Key of Trauma and Chemical Poisoning Third Military Medical University (Army Medical University), Chongqing, China
| | - Qiang Gong
- Department of Hematology, Southwest Hospital, First Affiliated Hospital of the Army Medical University, Chongqing, China
| | - Yan Chen
- Institute of Rocket Force Medicine, State Key of Trauma and Chemical Poisoning Third Military Medical University (Army Medical University), Chongqing, China
| | - Long Chen
- Institute of Rocket Force Medicine, State Key of Trauma and Chemical Poisoning Third Military Medical University (Army Medical University), Chongqing, China
| | - Chunmeng Shi
- Institute of Rocket Force Medicine, State Key of Trauma and Chemical Poisoning Third Military Medical University (Army Medical University), Chongqing, China
| |
Collapse
|
2
|
Tabatabai A, Arora A, Höfmann S, Jauch M, von Tresckow B, Hansen J, Flümann R, Jachimowicz RD, Klein S, Reinhardt HC, Knittel G. Mouse models of diffuse large B cell lymphoma. Front Immunol 2023; 14:1313371. [PMID: 38124747 PMCID: PMC10731046 DOI: 10.3389/fimmu.2023.1313371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 11/10/2023] [Indexed: 12/23/2023] Open
Abstract
Diffuse large B cell lymphoma (DLBCL) is a genetically highly heterogeneous disease. Yet, to date, the vast majority of patients receive standardized frontline chemo-immune-therapy consisting of an anthracycline backbone. Using these regimens, approximately 65% of patients can be cured, whereas the remaining 35% of patients will face relapsed or refractory disease, which, even in the era of CAR-T cells, is difficult to treat. To systematically tackle this high medical need, it is important to design, generate and deploy suitable in vivo model systems that capture disease biology, heterogeneity and drug response. Recently published, large comprehensive genomic characterization studies, which defined molecular sub-groups of DLBCL, provide an ideal framework for the generation of autochthonous mouse models, as well as an ideal benchmark for cell line-derived or patient-derived mouse models of DLBCL. Here we discuss the current state of the art in the field of mouse modelling of human DLBCL, with a particular focus on disease biology and genetically defined molecular vulnerabilities, as well as potential targeting strategies.
Collapse
Affiliation(s)
- Areya Tabatabai
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Aastha Arora
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Svenja Höfmann
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Maximilian Jauch
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Bastian von Tresckow
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Julia Hansen
- Department I of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Center for Integrated Oncology Aachen Bonn, Cologne, Germany
- Center for Molecular Medicine, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Mildred Scheel School of Oncology Aachen Bonn Cologne Düsseldorf (MSSO ABCD), Faculty of Medicine and University Hospital of Cologne, Cologne, Germany
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Ruth Flümann
- Department I of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Center for Integrated Oncology Aachen Bonn, Cologne, Germany
- Center for Molecular Medicine, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Mildred Scheel School of Oncology Aachen Bonn Cologne Düsseldorf (MSSO ABCD), Faculty of Medicine and University Hospital of Cologne, Cologne, Germany
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Ron D. Jachimowicz
- Department I of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Center for Integrated Oncology Aachen Bonn, Cologne, Germany
- Center for Molecular Medicine, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Mildred Scheel School of Oncology Aachen Bonn Cologne Düsseldorf (MSSO ABCD), Faculty of Medicine and University Hospital of Cologne, Cologne, Germany
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Sebastian Klein
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Hans Christian Reinhardt
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Gero Knittel
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, West German Cancer Center, German Cancer Consortium Partner Site Essen, Center for Molecular Biotechnology, University of Duisburg-Essen, Essen, Germany
| |
Collapse
|
3
|
Sheveleva O, Protasova E, Nenasheva T, Butorina N, Melnikova V, Gerasimova T, Sakovnich O, Kurinov A, Grigor’eva E, Medvedev S, Lyadova I. A Model of iPSC-Derived Macrophages with TNFAIP3 Overexpression Reveals the Peculiarities of TNFAIP3 Protein Expression and Function in Human Macrophages. Int J Mol Sci 2023; 24:12868. [PMID: 37629049 PMCID: PMC10454046 DOI: 10.3390/ijms241612868] [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: 07/04/2023] [Revised: 07/29/2023] [Accepted: 07/29/2023] [Indexed: 08/27/2023] Open
Abstract
Macrophages play a crucial role in the development and control of inflammation. Understanding the mechanisms balancing macrophage inflammatory activity is important to develop new strategies for treating inflammation-related diseases. TNF-α-induced protein 3 (TNFAIP3, A20) is a negative regulator of intracellular inflammatory cascades; its deficiency induces hyper-inflammatory reactions. Whether A20 overexpression can dampen macrophage inflammatory response remains unclear. Here, we generated human-induced pluripotent stem cells with tetracycline-inducible A20 expression and differentiated them into macrophages (A20-iMacs). A20-iMacs displayed morphology, phenotype, and phagocytic activity typical of macrophages, and they displayed upregulated A20 expression in response to doxycycline. A20 overexpression dampened the A20-iMac response to TNF-α, as shown by a decreased expression of IL1B and IL6 mRNA. A dynamic analysis of A20 expression following the generation of A20-iMacs and control iMacs showed that the expression declined in iMacs and that iMacs expressed a lower molecular weight form of the A20 protein (~70 kDa) compared with less differentiated cells (~90 kDa). A low-level expression of A20 and the predominance of a low-molecular-weight A20 form were also characteristic of monocyte-derived macrophages. The study for the first time developed a model for generating macrophages with an inducible expression of a target gene and identified the peculiarities of A20 expression in macrophages that likely underlie macrophage preparedness for inflammatory reactivity. It also suggested the possibility of mitigating inflammatory macrophage responses via A20 overexpression.
Collapse
Affiliation(s)
- Olga Sheveleva
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| | - Elena Protasova
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| | - Tatiana Nenasheva
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| | - Nina Butorina
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| | - Victoria Melnikova
- Laboratory of Comparative Developmental Physiology, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia;
| | - Tatiana Gerasimova
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| | - Olga Sakovnich
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| | - Alexander Kurinov
- Laboratory of Regeneration Problems, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia;
| | - Elena Grigor’eva
- Laboratory of Developmental Epigenetics, Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Lavrentyev Ave., 10, 630090 Novosibirsk, Russia; (E.G.); (S.M.)
| | - Sergey Medvedev
- Laboratory of Developmental Epigenetics, Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Lavrentyev Ave., 10, 630090 Novosibirsk, Russia; (E.G.); (S.M.)
| | - Irina Lyadova
- Laboratory of Cellular and Molecular Basis of Histogenesis, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova Str., 26, 119334 Moscow, Russia; (O.S.); (E.P.); (T.N.); (N.B.); (T.G.); (O.S.)
| |
Collapse
|
4
|
Cell-intrinsic factors governing quiescence vis-à-vis activation of adult hematopoietic stem cells. Mol Cell Biochem 2022; 478:1361-1382. [PMID: 36309884 DOI: 10.1007/s11010-022-04594-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/13/2022] [Indexed: 10/31/2022]
Abstract
Hematopoiesis is a highly complex process, regulated by both intrinsic and extrinsic factors. Often, these two regulatory arms work in tandem to maintain the steady-state condition of hematopoiesis. However, at times, certain intrinsic attributes of hematopoietic stem cells (HSCs) override the external stimuli and dominate the outcome. These could be genetic events like mutations or environmentally induced epigenetic or transcriptomic changes. Since leukemic stem cells (LSCs) share molecular pathways that also regulate normal HSCs, identifying specific, dominantly acting intrinsic factors could help in the development of novel therapeutic approaches. Here we have reviewed such dominantly acting intrinsic factors governing quiescence vis-à-vis activation of the HSCs in the face of external forces acting on them. For brevity, we have restricted our review to the articles dealing with adult HSCs of human and mouse origin that have been published in the last 10 years. Hematopoietic stem cells (HSCs) are closely associated with various stromal cells in their microenvironment and, thus, constantly receive signaling cues from them. The illustration depicts some dominantly acting intrinsic or cell-autonomous factors operative in the HSCs. These fall into various categories, such as epigenetic regulators, transcription factors, cell cycle regulators, tumor suppressor genes, signaling pathways, and metabolic regulators, which counteract the outcome of extrinsic signaling exerted by the HSC niche.
Collapse
|
5
|
Tsymbalyuk O, Gerzanich V, Simard JM, Rathinam CV. Traumatic brain injury alters dendritic cell differentiation and distribution in lymphoid and non-lymphoid organs. J Neuroinflammation 2022; 19:238. [PMID: 36183126 PMCID: PMC9526328 DOI: 10.1186/s12974-022-02609-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 09/24/2022] [Indexed: 11/10/2022] Open
Abstract
Background Pathophysiological consequences of traumatic brain injury (TBI) mediated secondary injury remain incompletely understood. In particular, the impact of TBI on the differentiation and maintenance of dendritic cells (DCs), which are regarded as the most professional antigen presenting cells of the immune system, remains completely unknown. Here, we report that DC-differentiation, maintenance and functions are altered on day 3 and day 7 after TBI. Methods Long bones, spleen, peripheral lymph nodes (pLNs), mesenteric lymph nodes (mLNs), liver, lungs, skin and blood were collected from mice with either moderate-level cortical impact (CCI) or sham on day 1, day 3 or day 7 after TBI. Bone marrow cells were isolated from the tibias and femurs of hind limb through flushing. Tissues were digested with Collagenase-D and DNase I. Skin biopsies were digested in the presence of liberase + DNase I. Single cell suspensions were made, red blood cells were lysed with Ammonium chloride (Stem Cell Technology) and subsequently filtered using a 70 μM nylon mesh. DC subsets of the tissues and DC progenitors of the BM were identified through 10-color flow cytometry-based immunophenotyping studies. Intracellular reactive oxygen species (ROS) were identified through H2DCFDA staining. Results Our studies identify that; (1) frequencies and absolute numbers of DCs in the spleen and BM are altered on day 3 and day 7 after TBI; (2) surface expression of key molecules involved in antigen presentation of DCs were affected on day 3 and day 7 after TBI; (3) distribution and functions of tissue-specific DC subsets of both circulatory and lymphatic systems were imbalanced following TBI; (4) early differentiation program of DCs, especially the commitment of hematopoietic stem cells to common DC progenitors (CDPs), were deregulated after TBI; and (5) intracellular ROS levels were reduced in DC progenitors and differentiated DCs on day 3 and day 7 after TBI. Conclusions Our data demonstrate, for the first time, that TBI affects the distribution pattern of DCs and induces an imbalance among DC subsets in both lymphoid and non-lymphoid organs. In addition, the current study demonstrates that TBI results in reduced levels of ROS in DCs on day 3 and day 7 after TBI, which may explain altered DC differentiation paradigm following TBI. A deeper understanding on the molecular mechanisms that contribute to DC defects following TBI would be essential and beneficial in treating infections in patients with acute central nervous system (CNS) injuries, such as TBI, stroke and spinal cord injury.
Collapse
Affiliation(s)
- Orest Tsymbalyuk
- Department of Neurosurgery, University of Maryland School of Medicine, MD, Baltimore, USA
| | - Volodymyr Gerzanich
- Department of Neurosurgery, University of Maryland School of Medicine, MD, Baltimore, USA
| | - J Marc Simard
- Department of Neurosurgery, University of Maryland School of Medicine, MD, Baltimore, USA.,Research Service, Veterans Affairs Maryland Health Care System, MD, Baltimore, USA.,Department of Pathology, University of Maryland School of Medicine, MD, Baltimore, USA.,Department of Physiology, University of Maryland School of Medicine, MD, Baltimore, USA
| | - Chozha Vendan Rathinam
- Institute of Human Virology, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, MD, 21201, USA. .,Center for Stem Cell and Regenerative Medicine, University of Maryland School of Medicine, MD, 21201, Baltimore, USA.
| |
Collapse
|
6
|
TNFAIP3 promotes ALDH-positive breast cancer stem cells through FGFR1/MEK/ERK pathway. MEDICAL ONCOLOGY (NORTHWOOD, LONDON, ENGLAND) 2022; 39:230. [PMID: 36175778 DOI: 10.1007/s12032-022-01844-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 09/05/2022] [Indexed: 10/14/2022]
Abstract
Breast cancer stem cells (BCSCs) are a tiny population of self-renewing cells that may contribute to cancer initiation, progression, and resistance to therapy in patients. In our prior study, we found that tumor necrosis factor alpha-induced protein 3 (TNFAIP3) is necessary for fibroblast growth factors receptor 1 (FGFR1) signaling-promoted tumor growth and progression in breast cancer (BC). This study aims to investigate the involvement of TNFAIP3 in regulating BCSCs. In this work, we showed that ALDH-positive BCSCs were increased by activating the FGFR1-MEK-ERK pathway, meanwhile utilizing FGFR1 inhibitor, MEK inhibitor, or ERK inhibitor reversed the phenomenon in BC cells. Moreover, ALDH-positive BCSCs were decreased in TNFAIP3-knockout or TNFAIP3-depressing cells. In vivo analysis displayed that TNFAIP3-silenced MDA-MB-231 xenografts developed smaller tumors and ALDH immunostaining levels were significantly lower in TNFAIP3-depressing or TNFAIP3-knockout tumor tissues. Besides, our results also revealed that TNFAIP3 influences the transcription stemness factors gene expression. Taken together, TNFAIP3 could be a potential regulator in FGFR1-MEK-ERK-promoted ALDH-positive BCSCs.
Collapse
|
7
|
Class I PI3K regulatory subunits control differentiation of dendritic cell subsets and regulate Flt3L mediated signal transduction. Sci Rep 2022; 12:12311. [PMID: 35853935 PMCID: PMC9296662 DOI: 10.1038/s41598-022-16548-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 07/12/2022] [Indexed: 11/18/2022] Open
Abstract
Dendritic cells (DCs) play pivotal roles in initiating and shaping both innate and adaptive immune responses. The spatiotemporal expression of transcription factor networks and activation of specific signal transduction pathways determine the specification, distribution and differentiation of DC subsets. Even though pioneering studies have established indispensable roles for specific catalytic subunits (p110δ and p110γ) in immune cells, functions of the regulatory subunits, particularly of Class I PI3K, within the hematopoietic system remain incompletely understood. In the study presented here, we deleted the key regulatory subunits—p85α and p85β of the Class IA PI3K in hematopoietic cells and studied its impact on DC differentiation. Our studies identify that a deficiency of p85 causes increased differentiation of conventional DC (cDC) 2 and plasmacytoid DC (pDC) subsets in the spleen. On the other hand, DC numbers in the bone marrow (BM), thymus and lymph nodes were decreased in p85 mutant mice. Analysis of DC-specific progenitors and precursors indicated increased numbers in the BM and spleen of p85 deficient mice. In-vitro differentiation studies demonstrated augmented DC-differentiation capacities of p85 deficient BM cells in the presence of GM-CSF and Flt3L. BM chimera studies established that p85 deficiency affects DC development through cell intrinsic mechanisms. Molecular studies revealed increased proliferation of DCs and common DC progenitors (CDPs) in the absence of p85 and altered signal transduction pathways in p85 mutant DC subsets in response to Flt3L. In essence, data presented here, for the first time, unequivocally establish that the P85α subunit of class IA PI3Ks has an indispensable role in the development and maintenance of DCs.
Collapse
|
8
|
Meyer SN, Koul S, Pasqualucci L. Mouse Models of Germinal Center Derived B-Cell Lymphomas. Front Immunol 2021; 12:710711. [PMID: 34456919 PMCID: PMC8387591 DOI: 10.3389/fimmu.2021.710711] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 06/28/2021] [Indexed: 12/19/2022] Open
Abstract
Over the last decades, the revolution in DNA sequencing has changed the way we understand the genetics and biology of B-cell lymphomas by uncovering a large number of recurrently mutated genes, whose aberrant function is likely to play an important role in the initiation and/or maintenance of these cancers. Dissecting how the involved genes contribute to the physiology and pathology of germinal center (GC) B cells -the origin of most B-cell lymphomas- will be key to advance our ability to diagnose and treat these patients. Genetically engineered mouse models (GEMM) that faithfully recapitulate lymphoma-associated genetic alterations offer a valuable platform to investigate the pathogenic roles of candidate oncogenes and tumor suppressors in vivo, and to pre-clinically develop new therapeutic principles in the context of an intact tumor immune microenvironment. In this review, we provide a summary of state-of-the art GEMMs obtained by accurately modelling the most common genetic alterations found in human GC B cell malignancies, with a focus on Burkitt lymphoma, follicular lymphoma, and diffuse large B-cell lymphoma, and we discuss how lessons learned from these models can help guide the design of novel therapeutic approaches for this disease.
Collapse
Affiliation(s)
- Stefanie N. Meyer
- Institute for Cancer Genetics, Columbia University, New York, NY, United States
| | - Sanjay Koul
- Department of Biological Sciences & Geology, Queensborough Community College (City University of New York), Bayside, NY, United States
| | - Laura Pasqualucci
- Institute for Cancer Genetics, Columbia University, New York, NY, United States
- Department of Pathology & Cell Biology, Columbia University, New York, NY, United States
- The Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, United States
| |
Collapse
|
9
|
Fisher DAC, Fowles JS, Zhou A, Oh ST. Inflammatory Pathophysiology as a Contributor to Myeloproliferative Neoplasms. Front Immunol 2021; 12:683401. [PMID: 34140953 PMCID: PMC8204249 DOI: 10.3389/fimmu.2021.683401] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 05/12/2021] [Indexed: 12/12/2022] Open
Abstract
Myeloid neoplasms, including acute myeloid leukemia (AML), myeloproliferative neoplasms (MPNs), and myelodysplastic syndromes (MDS), feature clonal dominance and remodeling of the bone marrow niche in a manner that promotes malignant over non-malignant hematopoiesis. This take-over of hematopoiesis by the malignant clone is hypothesized to include hyperactivation of inflammatory signaling and overproduction of inflammatory cytokines. In the Ph-negative MPNs, inflammatory cytokines are considered to be responsible for a highly deleterious pathophysiologic process: the phenotypic transformation of polycythemia vera (PV) or essential thrombocythemia (ET) to secondary myelofibrosis (MF), and the equivalent emergence of primary myelofibrosis (PMF). Bone marrow fibrosis itself is thought to be mediated heavily by the cytokine TGF-β, and possibly other cytokines produced as a result of hyperactivated JAK2 kinase in the malignant clone. MF also features extramedullary hematopoiesis and progression to bone marrow failure, both of which may be mediated in part by responses to cytokines. In MF, elevated levels of individual cytokines in plasma are adverse prognostic indicators: elevated IL-8/CXCL8, in particular, predicts risk of transformation of MF to secondary AML (sAML). Tumor necrosis factor (TNF, also known as TNFα), may underlie malignant clonal dominance, based on results from mouse models. Human PV and ET, as well as MF, harbor overproduction of multiple cytokines, above what is observed in normal aging, which can lead to cellular signaling abnormalities separate from those directly mediated by hyperactivated JAK2 or MPL kinases. Evidence that NFκB pathway signaling is frequently hyperactivated in a pan-hematopoietic pattern in MPNs, including in cells outside the malignant clone, emphasizes that MPNs are pan-hematopoietic diseases, which remodel the bone marrow milieu to favor persistence of the malignancy. Clinical evidence that JAK2 inhibition by ruxolitinib in MF neither reliably reduces malignant clonal burden nor eliminates cytokine elevations, suggests targeting cytokine mediated signaling as a therapeutic strategy, which is being pursued in new clinical trials. Greater knowledge of inflammatory pathophysiology in MPNs can therefore contribute to the development of more effective therapy.
Collapse
Affiliation(s)
- Daniel Arthur Corpuz Fisher
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| | - Jared Scott Fowles
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| | - Amy Zhou
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| | - Stephen Tracy Oh
- Divisions of Hematology & Oncology, School of Medicine, Washington University in St. Louis, Saint Louis, MO, United States
| |
Collapse
|
10
|
Zfp521 is essential for the quiescence and maintenance of adult hematopoietic stem cells under stress. iScience 2021; 24:102039. [PMID: 33532716 PMCID: PMC7822949 DOI: 10.1016/j.isci.2021.102039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/29/2020] [Accepted: 01/04/2021] [Indexed: 11/20/2022] Open
Abstract
Zinc finger protein 521 (Zfp521), a quiescent hematopoietic stem cell (HSC)-enriched transcription factor, is involved in the self-renewal and differentiation of fetal liver HSC. However, its role in adult hematopoiesis remains elusive. Here, we found that Zfp521 deletion did not inhibit adult hematopoiesis under homeostatic conditions. In contrast, Zfp521-null chimeric mice showed significantly reduced pool size of HSC and hematopoietic progenitor cells associated with increased apoptosis and loss of quiescence. Competitive serial transplantation assays revealed that Zfp521 regulates HSC self-renewal and differentiation under regenerative stress. Mechanistically, Zfp521 transcriptionally repressed Rela expression by increasing H3K9ac and decreasing H3K9me3 levels in its promoter. Knockdown of Rela inhibited the hyper-activated NF-κB pathway and reversed the loss of quiescence in Zfp521-null HSC under stress. Thus, our results reveal a previously unrecognized role for Zfp521 as critical regulator of quiescence and self-renewal of HSC in adult hematopoiesis mediated at least partly by controlling Rela expression.
Collapse
|
11
|
Nowak AJ, Relja B. The Impact of Acute or Chronic Alcohol Intake on the NF-κB Signaling Pathway in Alcohol-Related Liver Disease. Int J Mol Sci 2020; 21:E9407. [PMID: 33321885 PMCID: PMC7764163 DOI: 10.3390/ijms21249407] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023] Open
Abstract
Ethanol misuse is frequently associated with a multitude of profound medical conditions, contributing to health-, individual- and social-related damage. A particularly dangerous threat from this classification is coined as alcoholic liver disease (ALD), a liver condition caused by prolonged alcohol overconsumption, involving several pathological stages induced by alcohol metabolic byproducts and sustained cellular intoxication. Molecular, pathological mechanisms of ALD principally root in the innate immunity system and are especially associated with enhanced functionality of the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway. NF-κB is an interesting and convoluted DNA transcription regulator, promoting both anti-inflammatory and pro-inflammatory gene expression. Thus, the abundancy of studies in recent years underlines the importance of NF-κB in inflammatory responses and the mechanistic stimulation of inner molecular motifs within the factor components. Hereby, in the following review, we would like to put emphasis on the correlation between the NF-κB inflammation signaling pathway and ALD progression. We will provide the reader with the current knowledge regarding the chronic and acute alcohol consumption patterns, the molecular mechanisms of ALD development, the involvement of the NF-κB pathway and its enzymatic regulators. Therefore, we review various experimental in vitro and in vivo studies regarding the research on ALD, including the recent active compound treatments and the genetic modification approach. Furthermore, our investigation covers a few human studies.
Collapse
Affiliation(s)
- Aleksander J. Nowak
- Experimental Radiology, University Clinic for Radiology and Nuclear Medicine, Leipziger Strasse 44, 39120 Magdeburg, Germany;
- Medical Faculty, Otto-von-Guericke-University Magdeburg, Leipziger Strasse 44, 39120 Magdeburg, Germany
| | - Borna Relja
- Experimental Radiology, University Clinic for Radiology and Nuclear Medicine, Leipziger Strasse 44, 39120 Magdeburg, Germany;
- Medical Faculty, Otto-von-Guericke-University Magdeburg, Leipziger Strasse 44, 39120 Magdeburg, Germany
| |
Collapse
|
12
|
Cultrone D, Zammit NW, Self E, Postert B, Han JZR, Bailey J, Warren J, Croucher DR, Kikuchi K, Bogdanovic O, Chtanova T, Hesselson D, Grey ST. A zebrafish functional genomics model to investigate the role of human A20 variants in vivo. Sci Rep 2020; 10:19085. [PMID: 33154446 PMCID: PMC7644770 DOI: 10.1038/s41598-020-75917-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 09/25/2020] [Indexed: 01/21/2023] Open
Abstract
Germline loss-of-function variation in TNFAIP3, encoding A20, has been implicated in a wide variety of autoinflammatory and autoimmune conditions, with acquired somatic missense mutations linked to cancer progression. Furthermore, human sequence data reveals that the A20 locus contains ~ 400 non-synonymous coding variants, which are largely uncharacterised. The growing number of A20 coding variants with unknown function, but potential clinical impact, poses a challenge to traditional mouse-based approaches. Here we report the development of a novel functional genomics approach that utilizes a new A20-deficient zebrafish (Danio rerio) model to investigate the impact of TNFAIP3 genetic variants in vivo. A20-deficient zebrafish are hyper-responsive to microbial immune activation and exhibit spontaneous early lethality. Ectopic addition of human A20 rescued A20-null zebrafish from lethality, while missense mutations at two conserved A20 residues, S381A and C243Y, reversed this protective effect. Ser381 represents a phosphorylation site important for enhancing A20 activity that is abrogated by its mutation to alanine, or by a causal C243Y mutation that triggers human autoimmune disease. These data reveal an evolutionarily conserved role for TNFAIP3 in limiting inflammation in the vertebrate linage and show how this function is controlled by phosphorylation. They also demonstrate how a zebrafish functional genomics pipeline can be utilized to investigate the in vivo significance of medically relevant human TNFAIP3 gene variants.
Collapse
Affiliation(s)
- Daniele Cultrone
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia
| | - Nathan W Zammit
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia
| | - Eleanor Self
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia
| | - Benno Postert
- St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.,Diabetes Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia
| | - Jeremy Z R Han
- St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.,The Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia
| | - Jacqueline Bailey
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia
| | - Joanna Warren
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia
| | - David R Croucher
- St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.,The Kinghorn Cancer Centre, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia
| | - Kazu Kikuchi
- St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.,Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, 2010, Australia
| | - Ozren Bogdanovic
- St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.,Epigenetics Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia
| | - Tatyana Chtanova
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia
| | - Daniel Hesselson
- St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.,Diabetes Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia
| | - Shane T Grey
- Immunology Division, Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia. .,St Vincent's Clinical School, The University of New South Wales Sydney, Darlinghurst, NSW, 2010, Australia.
| |
Collapse
|
13
|
Smith MA, Culver-Cochran AE, Adelman ER, Rhyasen GW, Ma A, Figueroa ME, Starczynowski DT. TNFAIP3 Plays a Role in Aging of the Hematopoietic System. Front Immunol 2020; 11:536442. [PMID: 33224133 PMCID: PMC7670064 DOI: 10.3389/fimmu.2020.536442] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 10/09/2020] [Indexed: 12/22/2022] Open
Abstract
Hematopoietic stem and progenitor cells (HSPC) experience a functional decline in response to chronic inflammation or aging. Haploinsufficiency of A20, or TNFAIP3, an innate immune regulator, is associated with a variety of autoimmune, inflammatory, and hematologic malignancies. Based on a prior analysis of epigenomic and transcriptomic changes during normal human aging, we find that the expression of A20 is significantly reduced in aged HSPC as compared to young HSPC. Here, we show that the partial reduction of A20 expression in young HSPC results in characteristic features of aging. Specifically, heterozygous deletion of A20 in hematopoietic cells resulted in expansion of the HSPC pool, reduced HSPC fitness, and myeloid-biased hematopoiesis. These findings suggest that altered expression of A20 in HSPC contributes to an aging-like phenotype, and that there may be a common underlying mechanism for diminished HSPC function between inflammatory states and aging.
Collapse
Affiliation(s)
- Molly A Smith
- Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, United States
| | - Ashley E Culver-Cochran
- Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Emmalee R Adelman
- Department of Human Genetics, University of Miami, Miami, FL, United States
| | - Garrett W Rhyasen
- Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, United States
| | - Averil Ma
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Maria E Figueroa
- Department of Human Genetics, University of Miami, Miami, FL, United States.,Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, United States
| | - Daniel T Starczynowski
- Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, United States.,Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| |
Collapse
|
14
|
Xiong Z, Xia P, Zhu X, Geng J, Wang S, Ye B, Qin X, Qu Y, He L, Fan D, Du Y, Tian Y, Fan Z. Glutamylation of deubiquitinase BAP1 controls self-renewal of hematopoietic stem cells and hematopoiesis. J Exp Med 2020; 217:jem.20190974. [PMID: 31699823 PMCID: PMC7041701 DOI: 10.1084/jem.20190974] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 08/27/2019] [Accepted: 10/09/2019] [Indexed: 12/17/2022] Open
Abstract
Xiong et al. show that CCP3 performs deglutamylation of BAP1 to stabilize BAP1, which eliminates H2AK119Ub from Hoxa1 promoter and initiates Hoxa1 expression, leading to enhanced HSC self-renewal. All hematopoietic lineages are derived from a limited pool of hematopoietic stem cells (HSCs). Although the mechanisms underlying HSC self-renewal have been extensively studied, little is known about the role of protein glutamylation and deglutamylation in hematopoiesis. Here, we show that carboxypeptidase CCP3 is most highly expressed in BM cells among CCP members. CCP3 deficiency impairs HSC self-renewal and hematopoiesis. Deubiquitinase BAP1 is a substrate for CCP3 in HSCs. BAP1 is glutamylated at Glu651 by TTLL5 and TTLL7, and BAP1-E651A mutation abrogates BAP1 glutamylation. BAP1 glutamylation accelerates its ubiquitination to trigger its degradation. CCP3 can remove glutamylation of BAP1 to promote its stability, which enhances Hoxa1 expression, leading to HSC self-renewal. Bap1E651A mice produce higher numbers of LT-HSCs and peripheral blood cells. Moreover, TTLL5 and TTLL7 deficiencies sustain BAP1 stability to promote HSC self-renewal and hematopoiesis. Therefore, glutamylation and deglutamylation of BAP1 modulate HSC self-renewal and hematopoiesis.
Collapse
Affiliation(s)
- Zhen Xiong
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Pengyan Xia
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Xiaoxiao Zhu
- Key Laboratory of RNA Biology of Chinese Academy of Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Jingjing Geng
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Shuo Wang
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Buqing Ye
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Xiwen Qin
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yuan Qu
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Luyun He
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Dongdong Fan
- Key Laboratory of RNA Biology of Chinese Academy of Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Ying Du
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Yong Tian
- University of Chinese Academy of Sciences, Beijing, China.,Key Laboratory of RNA Biology of Chinese Academy of Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Zusen Fan
- Key Laboratory of Infection and Immunity of Chinese Academy of Sciences, Chinese Academy of Sciences Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
15
|
Muto T, Walker CS, Choi K, Hueneman K, Smith MA, Gul Z, Garcia-Manero G, Ma A, Zheng Y, Starczynowski DT. Adaptive response to inflammation contributes to sustained myelopoiesis and confers a competitive advantage in myelodysplastic syndrome HSCs. Nat Immunol 2020; 21:535-545. [PMID: 32313245 DOI: 10.1038/s41590-020-0663-z] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/17/2020] [Indexed: 02/06/2023]
Abstract
Despite evidence of chronic inflammation in myelodysplastic syndrome (MDS) and cell-intrinsic dysregulation of Toll-like receptor (TLR) signaling in MDS hematopoietic stem and progenitor cells (HSPCs), the mechanisms responsible for the competitive advantage of MDS HSPCs in an inflammatory milieu over normal HSPCs remain poorly defined. Here, we found that chronic inflammation was a determinant for the competitive advantage of MDS HSPCs and for disease progression. The cell-intrinsic response of MDS HSPCs, which involves signaling through the noncanonical NF-κB pathway, protected these cells from chronic inflammation as compared to normal HSPCs. In response to inflammation, MDS HSPCs switched from canonical to noncanonical NF-κB signaling, a process that was dependent on TLR-TRAF6-mediated activation of A20. The competitive advantage of TLR-TRAF6-primed HSPCs could be restored by deletion of A20 or inhibition of the noncanonical NF-κB pathway. These findings uncover the mechanistic basis for the clonal dominance of MDS HSPCs and indicate that interfering with noncanonical NF-κB signaling could prevent MDS progression.
Collapse
Affiliation(s)
- Tomoya Muto
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Callum S Walker
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kwangmin Choi
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kathleen Hueneman
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Molly A Smith
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Zartash Gul
- Department of Internal Medicine, University of Cincinnati, Cincinnati, OH, USA
| | | | - Averil Ma
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Yi Zheng
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Daniel T Starczynowski
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. .,Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. .,Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, USA.
| |
Collapse
|
16
|
Martens A, van Loo G. A20 at the Crossroads of Cell Death, Inflammation, and Autoimmunity. Cold Spring Harb Perspect Biol 2020; 12:cshperspect.a036418. [PMID: 31427375 DOI: 10.1101/cshperspect.a036418] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A20 is a potent anti-inflammatory protein, acting by inhibiting nuclear factor κB (NF-κB) signaling and inflammatory gene expression and/or by preventing cell death. Mutations in the A20/TNFAIP3 gene have been associated with a plethora of inflammatory and autoimmune pathologies in humans and in mice. Although the anti-inflammatory role of A20 is well accepted, fundamental mechanistic questions regarding its mode of action remain unclear. Here, we review new findings that further clarify the molecular and cellular mechanisms by which A20 controls inflammatory signaling and cell death, and discuss new evidence for its involvement in inflammatory and autoimmune disease development.
Collapse
Affiliation(s)
- Arne Martens
- VIB Center for Inflammation Research, 9052 Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Geert van Loo
- VIB Center for Inflammation Research, 9052 Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| |
Collapse
|
17
|
Nakagawa MM, Rathinam CV. Constitutive Activation of the Canonical NF-κB Pathway Leads to Bone Marrow Failure and Induction of Erythroid Signature in Hematopoietic Stem Cells. Cell Rep 2019; 25:2094-2109.e4. [PMID: 30463008 PMCID: PMC6945759 DOI: 10.1016/j.celrep.2018.10.071] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 08/29/2018] [Accepted: 10/19/2018] [Indexed: 11/24/2022] Open
Abstract
Constitutive activation of the canonical NF-κB pathway has been associated with a variety of human pathologies. However, molecular mechanisms through which canonical NF-κB affects hematopoiesis remain elusive. Here, we demonstrate that deregulated canonical NF-κB signals in hematopoietic stem cells (HSCs) cause a complete depletion of HSC pool, pancytopenia, bone marrow failure, and premature death. Constitutive activation of IKK2 in HSCs leads to impaired quiescence and loss of function. Gene set enrichment analysis (GSEA) identified an induction of “erythroid signature” in HSCs with augmented NF-κB activity. Mechanistic studies indicated a reduction of thrombopoietin (TPO)-mediated signals and its downstream target p57 in HSCs, due to reduced c-MpI expression in a cell-intrinsic manner. Molecular studies established Klf1 as a key suppressor of c-MpI in HSPCs with increased NF-κB. In essence, these studies identified a previously unknown mechanism through which exaggerated canonical NF-κB signals affect HSCs and cause pathophysiology. Nakagawa and Rathinam demonstrate that constitutive activation of IKK2 in HSCs causes a complete depletion of the HSC pool and impairs HSC functions due to a loss of “sternness” signature and an induction of erythroid signature.
Collapse
Affiliation(s)
- Masahiro Marshall Nakagawa
- Department of Genetics and Development, Columbia University Medical Center, 701 W. 168(th) Street, New York, NY 10032, USA
| | - Chozha Vendan Rathinam
- Department of Genetics and Development, Columbia University Medical Center, 701 W. 168(th) Street, New York, NY 10032, USA; Institute of Human Virology, University of Maryland, Baltimore, MD, USA; Center for Stem Cell & Regenerative Medicine, University of Maryland, Baltimore, MD, USA; Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, 725 W. Lombard Street, Baltimore, MD 21201, USA.
| |
Collapse
|
18
|
Functional analysis of deubiquitylating enzymes in tumorigenesis and development. Biochim Biophys Acta Rev Cancer 2019; 1872:188312. [DOI: 10.1016/j.bbcan.2019.188312] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/16/2019] [Accepted: 08/16/2019] [Indexed: 02/06/2023]
|
19
|
Nakagawa MM, Rathinam CV. A20 deficiency in hematopoietic stem cells causes lymphopenia and myeloproliferation due to elevated Interferon-γ signals. Sci Rep 2019; 9:12658. [PMID: 31477755 PMCID: PMC6718430 DOI: 10.1038/s41598-019-49038-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 08/19/2019] [Indexed: 11/09/2022] Open
Abstract
Inflammation and inflammatory cytokines have been shown to exert both positive and negative effects on hematopoietic stem cells (HSCs) and hematopoiesis. While the significance of inflammation driven hematopoiesis has begun to unfold, molecular players that regulate this phenomenon remain largely unknown. In the present study, we identified A20 as a critical regulator of inflammation controlled hematopoietic cell fate decisions of HSCs. A20 deficiency in HSCs leads to increased differentiation of myeloid cells and myeloproliferation. Analysis of erythroid lineage cells of A20 deficient mice indicated a striking reduction of erythrocytes in the bone marrow (BM), but elevated numbers in the spleen. Loss of A20 in HSCs causes a severe blockade of B cell differentiation in the BM and absence of peripheral B cells in the spleen, liver and blood. T cell differentiation studies revealed a reduction of both T cell progenitors and differentiated T cells in the thymus and altered T cell numbers in the spleens of A20 mutant mice. Analysis of lineage committed progenitors of the myeloid, erythroid and lymphoid lineages specified an altered composition in the A20 deficient BM. Genetic studies identified that specific loss of A20 in the myeloid lineage cells results in myeloproliferation. Bone marrow transplantation studies and mixed bone marrow chimera studies suggested an involvement of inflammatory cytokines, particularly interferon (IFN)- γ, in the onset of myeloproliferation and lymphopenia of A20 deficient mice. Finally, ablation of IFNγ signals in A20 deficient mice rescued the hematopoietic defects. In essence, these studies highlight a previously unknown role for A20 in the restriction of inflammation driven pathologic hematopoiesis. We believe that our studies based on A20 mutant mice will be helpful in understanding the pathophysiology and in the treatment of patients with A20 (TNFAIP3) mutations.
Collapse
Affiliation(s)
- Masahiro Marshall Nakagawa
- Department of Genetics and Development, Columbia University Medical Center, 701W 168th street, New York, NY, 10032, USA
| | - Chozha Vendan Rathinam
- Department of Genetics and Development, Columbia University Medical Center, 701W 168th street, New York, NY, 10032, USA. .,Institute of Human Virology, University of Maryland, School of Medicine, Baltimore, MD, 21201, USA. .,Center for Stem Cell & Regenerative Medicine, University of Maryland, School of Medicine, Baltimore, MD, 21201, USA. .,Marlene & Stewart Greenebaum Comprehensive Cancer Center, 725W Lombard Street, University of Maryland, School of Medicine, Baltimore, MD, 21201, USA.
| |
Collapse
|
20
|
Yang M, Zhou Y, Liu L, Wang S, Jiang J, Shang Q, Yu H, Xiang X, Pang X, Li T, Zhao P. Decreased A20 expression on circulating CD56 bright NK cells contributes to a worse disease status in patients with ankylosing spondylitis. Clin Exp Immunol 2019; 198:1-10. [PMID: 31206174 DOI: 10.1111/cei.13341] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2019] [Indexed: 12/31/2022] Open
Abstract
A20, a pivotal anti-inflammatory protein, preserves immune homeostasis and regulates prolonged inflammation. A previous study has shown that A20 expression levels are down-regulated in peripheral blood mononuclear cells (PBMCs) from patients with ankylosing spondylitis (AS). However, the precise role of A20 in reducing autoimmune disorders needs to be further elucidated. In this study, A20 expression was found to be preferentially reduced on circulating CD56bright natural killer (NK) cells in patients with AS, and its level was negatively correlated with that of proinflammatory cytokines. Further investigation demonstrated that A20 reduces interferon (IFN)-γ and tumour necrosis factor (TNF)-α production in CD56bright NK cells after stimulation with monokines or phorbol myristate acetate (PMA)/ionomycin(P/I). Furthermore, CD56bright NK cells isolated from AS patients promote TNF-α secretion by autologous monocytes, and increasing the A20 expression level partially attenuates this process. More importantly, decreased A20 expression on circulating CD56bright NK cells is associated with worse disease status in patients with AS. Our findings reveal that A20 participates in the pathogenesis of AS by negatively regulating CD56bright NK cells and that its reduced expression contributes to a worsened disease status in patients with AS.
Collapse
Affiliation(s)
- M Yang
- Department of Radiology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, China
| | - Y Zhou
- Department of Clinical Laboratory, Binzhou Medical University Hospital, Binzhou, China
| | - L Liu
- Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| | - S Wang
- Department of Rheumatology, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| | - J Jiang
- Department of Radiology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, China
| | - Q Shang
- Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| | - H Yu
- Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| | - X Xiang
- Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| | - X Pang
- Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| | - T Li
- Department of Clinical Laboratory, Binzhou Medical University Hospital, Binzhou, China
| | - P Zhao
- Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, Zibo, China
| |
Collapse
|
21
|
Fang J, Muto T, Kleppe M, Bolanos LC, Hueneman KM, Walker CS, Sampson L, Wellendorf AM, Chetal K, Choi K, Salomonis N, Choi Y, Zheng Y, Cancelas JA, Levine RL, Starczynowski DT. TRAF6 Mediates Basal Activation of NF-κB Necessary for Hematopoietic Stem Cell Homeostasis. Cell Rep 2019; 22:1250-1262. [PMID: 29386112 PMCID: PMC5971064 DOI: 10.1016/j.celrep.2018.01.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 12/14/2017] [Accepted: 01/04/2018] [Indexed: 11/03/2022] Open
Abstract
Basal nuclear factor κB (NF-κB) activation is required for hematopoietic stem cell (HSC) homeostasis in the absence of inflammation; however, the upstream mediators of basal NF-κB signaling are less well understood. Here, we describe TRAF6 as an essential regulator of HSC homeostasis through basal activation of NF-κB. Hematopoietic-specific deletion of Traf6 resulted in impaired HSC self-renewal and fitness. Gene expression, RNA splicing, and molecular analyses of Traf6-deficient hematopoietic stem/progenitor cells (HSPCs) revealed changes in adaptive immune signaling, innate immune signaling, and NF-κB signaling, indicating that signaling via TRAF6 in the absence of cytokine stimulation and/or infection is required for HSC function. In addition, we established that loss of IκB kinase beta (IKKβ)-mediated NF-κB activation is responsible for the major hematopoietic defects observed in Traf6-deficient HSPC as deletion of IKKβ similarly resulted in impaired HSC self-renewal and fitness. Taken together, TRAF6 is required for HSC homeostasis by maintaining a minimal threshold level of IKKβ/NF-κB signaling.
Collapse
Affiliation(s)
- Jing Fang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Tomoya Muto
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Maria Kleppe
- Human Oncology and Pathogenesis Program and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Lyndsey C Bolanos
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Kathleen M Hueneman
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Callum S Walker
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Leesa Sampson
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Ashley M Wellendorf
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Kashish Chetal
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Kwangmin Choi
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Nathan Salomonis
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Yongwon Choi
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Yi Zheng
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Jose A Cancelas
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Hoxworth Blood Center, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Ross L Levine
- Human Oncology and Pathogenesis Program and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Daniel T Starczynowski
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
| |
Collapse
|
22
|
Nakagawa MM, Davis H, Rathinam CV. A20 deficiency in multipotent progenitors perturbs quiescence of hematopoietic stem cells. Stem Cell Res 2018; 33:199-205. [PMID: 30445411 PMCID: PMC6919550 DOI: 10.1016/j.scr.2018.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 10/22/2018] [Accepted: 10/29/2018] [Indexed: 11/20/2022] Open
Abstract
Inflammatory signals have been shown to play a critical role in controlling the maintenance and functions of hematopoietic stem cells (HSCs). While the significance of inflammation in hematopoiesis has begun to unfold, molecular mechanisms and players that govern this mode of HSC regulation remain largely unknown. The E3 ubiquitin ligase A20 has been considered as a central gatekeeper of inflammation. Here, we have specifically depleted A20 in multi-potent progenitors (MPPs) and studied its impact on hematopoiesis. Our data suggest that lack of A20 in Flt3+ progenitors causes modest alterations in hematopoietic differentiation. Analysis of hematopoietic stem and progenitor cell (HSPC) pool revealed alterations in HSPC subsets including, HSCs, MPP1, MPP2, MPP3 and MPP4. Interestingly, A20 deficiency in MPPs caused loss of HSC quiescence and compromised long-term hematopoietic reconstitution. Mechanistic studies identified that A20 deficiency caused elevated levels of Interferon-γ signaling and downregulation of p57 in HSCs. In essence, these studies identified A20 as a key regulator of HSC quiescence and cell fate decisions.
Collapse
Affiliation(s)
- Masahiro Marshall Nakagawa
- Department of Genetics and Development, Columbia University Medical Center, 701 W 168th street, New York, NY 10032, United States
| | - Harry Davis
- Institute of Human Virology, 725 W Lombard Street, University of Maryland, School of Medicine, Baltimore, MD 21201, United States
| | - Chozha Vendan Rathinam
- Department of Genetics and Development, Columbia University Medical Center, 701 W 168th street, New York, NY 10032, United States; Institute of Human Virology, 725 W Lombard Street, University of Maryland, School of Medicine, Baltimore, MD 21201, United States; Center for Stem Cell & Regenerative Medicine, 725 W Lombard Street, University of Maryland, School of Medicine, Baltimore, MD 21201, United States; Marlene & Stewart Greenebaum Comprehensive Cancer Center, 725 W Lombard Street, University of Maryland, School of Medicine, Baltimore, MD 21201, United States.
| |
Collapse
|
23
|
Nakagawa MM, Chen H, Rathinam CV. Constitutive Activation of NF-κB Pathway in Hematopoietic Stem Cells Causes Loss of Quiescence and Deregulated Transcription Factor Networks. Front Cell Dev Biol 2018; 6:143. [PMID: 30425986 PMCID: PMC6218573 DOI: 10.3389/fcell.2018.00143] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 10/05/2018] [Indexed: 12/21/2022] Open
Abstract
Identifying physiological roles of specific signaling pathways that regulate hematopoietic stem cell (HSC) functions may lead to new treatment strategies and therapeutic interventions for hematologic disorders. Here, we provide genetic evidence that constitutive activation of NF-κB in HSCs results in reduced pool size, repopulation capacities, and quiescence of HSCs. Global transcriptional profiling and bioinformatics studies identified loss of ‘stemness’ and ‘quiescence’ signatures in HSCs with deregulated NF-κB activation. In particular, gene set enrichment analysis identified upregulation of cyclin dependent kinase- Ccnd1 and down regulation of cyclin dependent kinase inhibitor p57kip2. Interestingly, constitutive activation of NF-κB is sufficient to alter the regulatory circuits of transcription factors (TFs) that are critical to HSC self-renewal and functions. Molecular studies identified Junb, as one of the direct targets of NF-κB in hematopoietic cells. In essence, these studies demonstrate that aberrant activation of NF-κB signals impairs HSC quiescence and functions and alters the ‘TF networks’ in HSCs.
Collapse
Affiliation(s)
| | - Huanwen Chen
- Institute of Human Virology, Baltimore, MD, United States
| | - Chozha Vendan Rathinam
- Department of Genetics and Development, Columbia University Medical Center, New York, NY, United States.,Institute of Human Virology, Baltimore, MD, United States.,Center for Stem Cell & Regenerative Medicine, Baltimore, MD, United States.,Marlene & Stewart Greenebaum Comprehensive Cancer Center, School of Medicine, University of Maryland, Baltimore, MD, United States
| |
Collapse
|
24
|
He Y, Xu LL, Feng FE, Wang QM, Zhu XL, Wang CC, Zhang JM, Fu HX, Xu LP, Liu KY, Huang XJ, Zhang XH. Mesenchymal stem cell deficiency influences megakaryocytopoiesis through the TNFAIP3/NF-κB/SMAD pathway in patients with immune thrombocytopenia. Br J Haematol 2018; 180:395-411. [PMID: 29327472 DOI: 10.1111/bjh.15034] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/19/2017] [Indexed: 12/27/2022]
Abstract
Immune thrombocytopenia (ITP) is an autoimmune disease. Mesenchymal stem cells (MSCs) play important roles in the physiology and homeostasis of the haematopoietic system, including supporting megakaryocytic differentiation from CD34+ haematopoietic progenitor cells. Tumour necrosis factor alpha-induced protein 3 (TNFAIP3, also termed A20) plays a key role in terminating NF-κB signalling. Human genetic studies showed that the polymorphisms of the TNFAIP3 gene may contribute to ITP susceptibility. In this study, we showed a significant decrease in TNFAIP3 and increase in NF-κB/SMAD7 in ITP-MSCs. In co-cultures with CD34+ cells, NF-κB was overexpressed in MSCs from healthy controls (HC-MSCs) after transfection with NFKBIA (IκB)-specific short hairpin (sh)RNAs, resulting in MSC deficiency and a reduction in megakaryocytic differentiation and thrombopoiesis. Knockdown of TNFAIP3 expression using TNFAIP3-specific shRNAs in HC-MSCs affected megakaryocytopoiesis. However, IKBKB knockdown corrected megakaryocytopoiesis inhibition in the ITP-MSCs by decreasing NF-κB expression. Amplified TNFAIP3 expression in ITP-MSCs by TNFAIP3 cDNA can facilitate megakaryocyte differentiation. shRNA-mediated knockdown of SMAD7 expression rescued the impaired MSC function in ITP patients. Therefore, we demonstrate that a pathological reduction in TNFAIP3 levels induced NF-κB/SMAD7 pathway activation, causing a deficiency in MSCs in ITP patients. The ability of ITP-MSCs to support megakaryocytic differentiation and thrombopoiesis of CD34+ cells was impaired.
Collapse
Affiliation(s)
- Yun He
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China.,Beijing Key Laboratory of Haematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Centre of Haematology, Peking University, Beijing, China
| | - Lin-Lin Xu
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Fei-Er Feng
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Qian-Ming Wang
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Xiao-Lu Zhu
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Chen-Cong Wang
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Jia-Min Zhang
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Hai-Xia Fu
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China
| | - Lan-Ping Xu
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China.,Beijing Key Laboratory of Haematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Centre of Haematology, Peking University, Beijing, China
| | - Kai-Yan Liu
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China.,Beijing Key Laboratory of Haematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Centre of Haematology, Peking University, Beijing, China
| | - Xiao-Jun Huang
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China.,Beijing Key Laboratory of Haematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Centre of Haematology, Peking University, Beijing, China
| | - Xiao-Hui Zhang
- Peking University People's Hospital, Peking University Institute of Haematology, Beijing, China.,Beijing Key Laboratory of Haematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Centre of Haematology, Peking University, Beijing, China
| |
Collapse
|
25
|
Xiu Y, Dong Q, Li Q, Li F, Borcherding N, Zhang W, Boyce B, Xue HH, Zhao C. Stabilization of NF-κB-Inducing Kinase Suppresses MLL-AF9-Induced Acute Myeloid Leukemia. Cell Rep 2018; 22:350-358. [PMID: 29320732 PMCID: PMC5810947 DOI: 10.1016/j.celrep.2017.12.055] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 11/02/2017] [Accepted: 12/15/2017] [Indexed: 02/08/2023] Open
Abstract
Canonical NF-κB signaling is constitutively activated in acute myeloid leukemia (AML) stem cells and is required for maintenance of the self-renewal of leukemia stem cells (LSCs). However, any potential role for NF-κB non-canonical signaling in AML has been largely overlooked. Here, we report that stabilization of NF-κB-inducing kinase (NIK) suppresses AML. Mechanistically, stabilization of NIK activates NF-κB non-canonical signaling and represses NF-κB canonical signaling. In addition, stabilization of NIK-induced activation of NF-κB non-canonical signaling upregulates Dnmt3a and downregulates Mef2c, which suppresses and promotes AML development, respectively. Importantly, by querying the connectivity MAP using up- and downregulated genes that are present exclusively in NIK-stabilized LSCs, we discovered that verteporfin has anti-AML effects, suggesting that repurposing verteporfin to target myeloid leukemia is worth testing clinically. Our data provide a scientific rationale for developing small molecules to stabilize NIK specifically in myeloid leukemias as an attractive therapeutic option.
Collapse
Affiliation(s)
- Yan Xiu
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Qianze Dong
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Department of Pathology, China Medical University, 77 Puhe Rd., Shenbei Xinqu, Shenyang Shi, Liaoning Sheng 110122, China
| | - Qingchang Li
- Department of Pathology, China Medical University, 77 Puhe Rd., Shenbei Xinqu, Shenyang Shi, Liaoning Sheng 110122, China
| | - Fengyin Li
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Nick Borcherding
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Weizhou Zhang
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Brendan Boyce
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Hai-Hui Xue
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA.
| | - Chen Zhao
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA.
| |
Collapse
|
26
|
Higuchi M, Kawamura H, Matsuki H, Hara T, Takahashi M, Saito S, Saito K, Jiang S, Naito M, Kiyonari H, Fujii M. USP10 Is an Essential Deubiquitinase for Hematopoiesis and Inhibits Apoptosis of Long-Term Hematopoietic Stem Cells. Stem Cell Reports 2017; 7:1116-1129. [PMID: 27974222 PMCID: PMC5161743 DOI: 10.1016/j.stemcr.2016.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 11/04/2016] [Accepted: 11/06/2016] [Indexed: 11/07/2022] Open
Abstract
Self-renewal, replication, and differentiation of hematopoietic stem cells (HSCs) are regulated by cytokines produced by niche cells in fetal liver and bone marrow. HSCs must overcome stresses induced by cytokine deprivation during normal development. In this study, we found that ubiquitin-specific peptidase 10 (USP10) is a crucial deubiquitinase for mouse hematopoiesis. All USP10 knockout (KO) mice died within 1 year because of bone marrow failure with pancytopenia. Bone marrow failure in these USP10-KO mice was associated with remarkable reductions of long-term HSCs (LT-HSCs) in bone marrow and fetal liver. Such USP10-KO fetal liver exhibited enhanced apoptosis of hematopoietic stem/progenitor cells (HSPCs) including LT-HSCs but not of lineage-committed progenitor cells. Transplantation of USP10-competent bone marrow cells into USP10-KO mice reconstituted multilineage hematopoiesis. These results suggest that USP10 is an essential deubiquitinase in hematopoiesis and functions by inhibiting apoptosis of HSPCs including LT-HSCs. Systemic USP10-knockout mice develop bone marrow failure because of HSC depletion USP10 inhibits apoptosis of long-term HSCs in fetal liver USP10 inhibits cytokine deprivation-induced apoptosis of fetal liver HSPCs in vitro
Collapse
Affiliation(s)
- Masaya Higuchi
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan.
| | - Hiroki Kawamura
- Department of Clinical Engineering and Medical Technology, Faculty of Medical Technology, Niigata University of Health and Welfare, Niigata 950-3198, Japan
| | - Hideaki Matsuki
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan
| | - Toshifumi Hara
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan
| | - Masahiko Takahashi
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan
| | - Suguru Saito
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan
| | - Kousuke Saito
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan
| | - Shuying Jiang
- Division of Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan; Niigata College of Medical Technology, Niigata 950-2076, Japan
| | - Makoto Naito
- Division of Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Hiroshi Kiyonari
- Animal Resource Development Unit and Genetic Engineering Team, RIKEN Center for Life Science Technologies, Kobe 650-0047, Japan
| | - Masahiro Fujii
- Division of Virology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata 951-8510, Japan.
| |
Collapse
|
27
|
Kim TG, Kim S, Jung S, Kim M, Yang B, Lee MG, Kim HP. CCCTC-binding factor is essential to the maintenance and quiescence of hematopoietic stem cells in mice. Exp Mol Med 2017; 49:e371. [PMID: 28857086 PMCID: PMC5579513 DOI: 10.1038/emm.2017.124] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 02/27/2017] [Accepted: 03/20/2017] [Indexed: 12/11/2022] Open
Abstract
Hematopoiesis involves a series of lineage differentiation programs initiated in hematopoietic stem cells (HSCs) found in bone marrow (BM). To ensure lifelong hematopoiesis, various molecular mechanisms are needed to maintain the HSC pool. CCCTC-binding factor (CTCF) is a DNA-binding, zinc-finger protein that regulates the expression of its target gene by organizing higher order chromatin structures. Currently, the role of CTCF in controlling HSC homeostasis is unknown. Using a tamoxifen-inducible CTCF conditional knockout mouse system, we aimed to determine whether CTCF regulates the homeostatic maintenance of HSCs. In adult mice, acute systemic CTCF ablation led to severe BM failure and the rapid shrinkage of multiple c-Kithi progenitor populations, including Sca-1+ HSCs. Similarly, hematopoietic system-confined CTCF depletion caused an acute loss of HSCs and highly increased mortality. Mixed BM chimeras reconstituted with supporting BM demonstrated that CTCF deficiency-mediated HSC depletion has both cell-extrinsic and cell-intrinsic effects. Although c-Kithi myeloid progenitor cell populations were severely reduced after ablating Ctcf, c-Kitint common lymphoid progenitors and their progenies were less affected by the lack of CTCF. Whole-transcriptome microarray and cell cycle analyses indicated that CTCF deficiency results in the enhanced expression of the cell cycle-promoting program, and that CTCF-depleted HSCs express higher levels of reactive oxygen species (ROS). Importantly, in vivo treatment with an antioxidant partially rescued c-Kithi cell populations and their quiescence. Altogether, our results suggest that CTCF is indispensable for maintaining adult HSC pools, likely by regulating ROS-dependent HSC quiescence.
Collapse
Affiliation(s)
- Tae-Gyun Kim
- Department of Environmental Medical Biology, Institute. of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Sueun Kim
- Department of Environmental Medical Biology, Institute. of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Soyeon Jung
- Department of Environmental Medical Biology, Institute. of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Mikyoung Kim
- Department of Environmental Medical Biology, Institute. of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Bobae Yang
- Department of Environmental Medical Biology, Institute. of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Min-Geol Lee
- BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Hyoung-Pyo Kim
- Department of Environmental Medical Biology, Institute. of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| |
Collapse
|
28
|
Umemoto T, Matsuzaki Y, Shiratsuchi Y, Hashimoto M, Yoshimoto T, Nakamura-Ishizu A, Petrich B, Yamato M, Suda T. Integrin αvβ3 enhances the suppressive effect of interferon-γ on hematopoietic stem cells. EMBO J 2017; 36:2390-2403. [PMID: 28673932 DOI: 10.15252/embj.201796771] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/17/2017] [Accepted: 05/30/2017] [Indexed: 12/19/2022] Open
Abstract
Hematopoietic homeostasis depends on the maintenance of hematopoietic stem cells (HSCs), which are regulated within a specialized bone marrow (BM) niche. When HSC sense external stimuli, their adhesion status may be critical for determining HSC cell fate. The cell surface molecule, integrin αvβ3, is activated through HSC adhesion to extracellular matrix and niche cells. Integrin β3 signaling maintains HSCs within the niche. Here, we showed the synergistic negative regulation of the pro-inflammatory cytokine interferon-γ (IFNγ) and β3 integrin signaling in murine HSC function by a novel definitive phenotyping of HSCs. Integrin αvβ3 suppressed HSC function in the presence of IFNγ and impaired integrin β3 signaling mitigated IFNγ-dependent negative action on HSCs. During IFNγ stimulation, integrin β3 signaling enhanced STAT1-mediated gene expression via serine phosphorylation. These findings show that integrin β3 signaling intensifies the suppressive effect of IFNγ on HSCs, which indicates that cell adhesion via integrin αvβ3 within the BM niche acts as a context-dependent signal modulator to regulate the HSC function under both steady-state and inflammatory conditions.
Collapse
Affiliation(s)
- Terumasa Umemoto
- International Research Center for Medical Science, Kumamoto University, Kumamoto, Japan
| | - Yu Matsuzaki
- International Research Center for Medical Science, Kumamoto University, Kumamoto, Japan
| | - Yoshiko Shiratsuchi
- Institute of Advanced Medical Bioscience and Engineering, Tokyo Women's Medical University, Tokyo, Japan
| | - Michihiro Hashimoto
- International Research Center for Medical Science, Kumamoto University, Kumamoto, Japan
| | - Takayuki Yoshimoto
- Department of Immunoregulation, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Ayako Nakamura-Ishizu
- Cancer Science Institute of Singapore, National University of Singapore, Singapore City, Singapore
| | - Brian Petrich
- Department of Pediatrics and Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Masayuki Yamato
- Institute of Advanced Medical Bioscience and Engineering, Tokyo Women's Medical University, Tokyo, Japan
| | - Toshio Suda
- International Research Center for Medical Science, Kumamoto University, Kumamoto, Japan .,Cancer Science Institute of Singapore, National University of Singapore, Singapore City, Singapore
| |
Collapse
|
29
|
Xiu Y, Xue WY, Lambertz A, Leidinger M, Gibson-Corley K, Zhao C. Constitutive Activation of NIK Impairs the Self-Renewal of Hematopoietic Stem/Progenitor Cells and Induces Bone Marrow Failure. Stem Cells 2017; 35:777-786. [PMID: 27733012 PMCID: PMC5817891 DOI: 10.1002/stem.2523] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/23/2016] [Accepted: 10/04/2016] [Indexed: 12/12/2022]
Abstract
Previously we have shown that loss of non-canonical NF-κB signaling impairs self-renewal of hematopoietic stem/progenitor cells (HSPCs). This prompted us to investigate whether persistent activation of the non-canonical NF-κB signaling will have supportive effects on HSPC self-renewal. NF-κB-inducing kinase (NIK) is an important kinase that mainly activates the non-canonical pathway through directly phosphorylating IKKα. In contrast to our expectations, constitutive activation of NIK in the hematopoietic system leads to bone marrow (BM) failure and postnatal lethality due to intrinsic impairment of HSPC self-renewal and extrinsic disruption of BM microenvironment through enhancing osteoclastogenesis. The impaired HSPC function is associated with reduced cell proliferation and increased apoptosis and inflammatory cytokine responses. RNAseq analysis of control and NIK-activated HSPCs reveals that these effects are through non-canonical NF-κB signaling without significant changes in the canonical pathway. Gene set expression analysis of RNAseq data reveals globally decreased stem cell signature, increased maturation signature, and increased inflammatory responses. Many genes (Mpl, Tifab, Emcn, Flt3, Bcl2, and others) that regulate HSPC self-renewal, lineage commitment, and apoptosis are significantly downregulated-and those genes that regulate inflammatory responses and cell cycle inhibition (Cdkn2a and Cdkn2b) are significantly upregulated-by activation of NIK. Importantly, our data demonstrate that activation of NIK-non-canonical signaling has distinct phenotypes-smaller spleen size, decreased white blood cell counts, and reduced HSPC proliferation-compared to activation of canonical signaling. Collectively, these data indicate that the balanced non-canonical NF-κB signaling is essential for maintaining normal hematopoiesis and NIK-non-canonical signaling contributes to the development of BM failure. Stem Cells 2017;35:777-786.
Collapse
Affiliation(s)
- Yan Xiu
- Department of Pathology Carver College of Medicine, University of Iowa, IA 52242
| | | | - Allyn Lambertz
- Department of Pathology Carver College of Medicine, University of Iowa, IA 52242
| | - Mariah Leidinger
- Department of Pathology Carver College of Medicine, University of Iowa, IA 52242
| | | | - Chen Zhao
- Department of Pathology Carver College of Medicine, University of Iowa, IA 52242
| |
Collapse
|
30
|
Zeng P, Ma J, Yang R, Liu YC. Immune Regulation by Ubiquitin Tagging as Checkpoint Code. Curr Top Microbiol Immunol 2017; 410:215-248. [PMID: 28929193 DOI: 10.1007/82_2017_64] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The immune system is equipped with effective machinery to mobilize its activation to defend invading microorganisms, and at the same time, to refrain from attacking its own tissues to maintain immune tolerance. The balance of activation and tolerance is tightly controlled by diverse mechanisms, since breakdown of tolerance could result in disastrous consequences such as the development of autoimmune diseases. One of the mechanisms is by the means of protein ubiquitination, which involves the process of tagging a small peptide ubiquitin to protein substrates. E3 ubiquitin ligases are responsible for catalyzing the final step of ubiquitin-substrate conjugation by specifically recognizing substrates to determine their fates of degradation or functional modification. The ubiquitination process is reversible, which is carried out by deubiquitinating enzymes to release the ubiquitin molecule from the conjugated substrates. Protein ubiquitination and deubiquitination serve as checkpoint codes in many key steps of lymphocyte regulation including the development, activation, differentiation, and tolerance induction. In this chapter, we will discuss a few E3 ligases and deubiquitinating enzymes that are important in controlling immune responses, with emphasis on their roles in T cells.
Collapse
Affiliation(s)
- Peng Zeng
- Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Jieyu Ma
- Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Runqing Yang
- Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Yun-Cai Liu
- Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China. .,Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA.
| |
Collapse
|
31
|
miR-127 promotes EMT and stem-like traits in lung cancer through a feed-forward regulatory loop. Oncogene 2016; 36:1631-1643. [PMID: 27869168 DOI: 10.1038/onc.2016.332] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 08/01/2016] [Accepted: 08/03/2016] [Indexed: 12/13/2022]
Abstract
The coordination between cellular differentiation and the mesenchymal/stem transition is essential for both embryo development and neoplasia, suggesting a mechanistic link between these two major processes. In this work we show that miR-127, an embryo-expressing lung miRNA, was prominently induced in lung adenocarcinoma and correlated with poor prognosis. Elevated miR-127 level drove a pronounced shift from the epithelial to the mesenchymal phenotype in cancer cells, and this shift was associated with their acquisition of stem-like traits, increased resistance to the epidermal growth factor receptor inhibitor and tumor-propagating potential. In contrast, antagonizing miR-127 markedly reversed this malignant transition, compromised the stem-like properties and the in vivo tumorigenic capability of cancer cells. Importantly, a regulatory loop involving the inflammatory signals NF-κB, miR-127 and tumor necrosis factor alpha-induced protein 3 was uncovered as a self-reinforcing circuitry that ensured an aggressive transition in lung cancer. Thus, this work identifies a novel molecular mechanism linking stemness, malignancy and inflammation, opening a new avenue for cancer treatment.
Collapse
|
32
|
Lu K, Nakagawa MM, Thummar K, Rathinam CV. Slicer Endonuclease Argonaute 2 Is a Negative Regulator of Hematopoietic Stem Cell Quiescence. Stem Cells 2016; 34:1343-53. [PMID: 26850790 DOI: 10.1002/stem.2302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 12/11/2015] [Indexed: 12/12/2022]
Abstract
Hematopoietic stem cells (HSCs) are capable of both self-renewing throughout the lifetime of an organism and differentiating into all lineages of the blood system. A proper balance between quiescence and proliferation is critical for the self-renewal and functions of HSCs. The choice of HSCs to remain quiescent or to enter proliferation has been tightly regulated by a variety of cell intrinsic and extrinsic pathways. Identifying molecular players that control HSC quiescence and proliferation may lead to new treatment strategies and therapeutic interventions for hematologic disorders. To identify the functions of the slicer endonuclease Argonaute (Ago) 2 in the physiology of HSCs, we generated Ago2(Hem-KO) mice, that are deficient for Ago2 in HSCs and in their progeny. Analysis of Ago2(Hem-KO) mice indicated that a loss of Ago2 results in reduced HSC pool size and altered frequencies of hematopoietic progenitors. Ago2 deficient HSCs exhibit defective multilineage differentiation capacities and diminished repopulation abilities, in a cell intrinsic manner. Interestingly, Ago2 mutant HSCs remain largely quiescent and show reduced entry into cell cycle. Genome-wide transcriptome studies and gene set enrichment analysis revealed that Ago2 deficient HSCs downregulate the "HSC signature" and upregulate the "lineage signature." Moreover, our analysis on transcription factors (TFs) identified that a loss of Ago2 is sufficient to alter the "molecular signature" and "TF networks" that control the quiescent and proliferative states of HSCs. In essence, our study identified Ago2 as a key determinant of quiescence exit in HSCs. Stem Cells 2016;34:1343-1353.
Collapse
Affiliation(s)
- Kenneth Lu
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA
| | | | - Keyur Thummar
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA
| | - Chozha Vendan Rathinam
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA.,Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, USA.,Columbia Stem Cell Initiative, Columbia University Medical Center, New York, New York, USA
| |
Collapse
|
33
|
|
34
|
Deconstructing innate immune signaling in myelodysplastic syndromes. Exp Hematol 2015; 43:587-598. [PMID: 26143580 DOI: 10.1016/j.exphem.2015.05.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 05/23/2015] [Indexed: 02/06/2023]
Abstract
Overexpression of immune-related genes is widely reported in myelodysplastic syndromes (MDSs), and chronic immune stimulation increases the risk for developing MDS. Aberrant innate immune activation, such as that caused by increased toll-like receptor (TLR) signaling, in MDS can contribute to systemic effects on hematopoiesis, in addition to cell-intrinsic defects on hematopoietic stem/progenitor cell (HSPC) function. This review will deconstruct aberrant function of TLR signaling mediators within MDS HSPCs that may contribute to cell-intrinsic consequences on hematopoiesis and disease pathogenesis. We will discuss the contribution of chronic TLR signaling to the pathogenesis of MDS based on evidence from patients and mouse genetic models.
Collapse
|
35
|
Tesio M, Tang Y, Müdder K, Saini M, von Paleske L, Macintyre E, Pasparakis M, Waisman A, Trumpp A. Hematopoietic stem cell quiescence and function are controlled by the CYLD-TRAF2-p38MAPK pathway. ACTA ACUST UNITED AC 2015; 212:525-38. [PMID: 25824820 PMCID: PMC4387289 DOI: 10.1084/jem.20141438] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 02/24/2015] [Indexed: 12/19/2022]
Abstract
Tesio at al. identify a novel pathway controlled by the tumor suppressor and deubiquitinase cylindromatosis (CYLD), which is involved in the regulation of hematopoietic stem cell quiescence and repopulation potential. The status of long-term quiescence and dormancy guarantees the integrity of hematopoietic stem cells (HSCs) during adult homeostasis. However the molecular mechanisms regulating HSC dormancy remain poorly understood. Here we show that cylindromatosis (CYLD), a tumor suppressor gene and negative regulator of NF-κB signaling with deubiquitinase activity, is highly expressed in label-retaining dormant HSCs (dHSCs). Moreover, Cre-mediated conditional elimination of the catalytic domain of CYLD induced dHSCs to exit quiescence and abrogated their repopulation and self-renewal potential. This phenotype is dependent on the interactions between CYLD and its substrate TRAF2 (tumor necrosis factor–associated factor 2). HSCs expressing a mutant CYLD with an intact catalytic domain, but unable to bind TRAF2, showed the same HSC phenotype. Unexpectedly, the robust cycling of HSCs lacking functional CYLD–TRAF2 interactions was not elicited by increased NF-κB signaling, but instead by increased activation of the p38MAPK pathway. Pharmacological inhibition of p38MAPK rescued the phenotype of CYLD loss, identifying the CYLD–TRAF2–p38MAPK pathway as a novel important regulator of HSC function restricting HSC cycling and promoting dormancy.
Collapse
Affiliation(s)
- Melania Tesio
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Yilang Tang
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University of Mainz, 55131 Mainz, Germany
| | - Katja Müdder
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Massimo Saini
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Lisa von Paleske
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Elizabeth Macintyre
- Institut Necker-Enfants Malades (INEM) and Université Paris Sorbonne Cité at Descartes, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1151, Assistance Publique-Hôpitaux de Paris (AP-HP), 75015 Paris, France
| | - Manolis Pasparakis
- CECAD Research Center, Institute for Genetics, University of Cologne, 50931 Cologne, Germany
| | - Ari Waisman
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University of Mainz, 55131 Mainz, Germany
| | - Andreas Trumpp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany The German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| |
Collapse
|