101
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Non-canonical Wnt signaling regulates neural stem cell quiescence during homeostasis and after demyelination. Nat Commun 2018; 9:36. [PMID: 29296000 PMCID: PMC5750230 DOI: 10.1038/s41467-017-02440-0] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 11/29/2017] [Indexed: 12/11/2022] Open
Abstract
Adult neural stem cells (NSCs) reside in a specialized microenvironment, the subventricular zone (SVZ), which provides them with unique signaling cues to control their basic properties and prevent their exhaustion. While the signaling mechanisms that regulate NSC lineage progression are well characterized, the molecular mechanisms that trigger the activation of quiescent NSCs during homeostasis and tissue repair are still unclear. Here, we uncovered that the NSC quiescent state is maintained by Rho-GTPase Cdc42, a downstream target of non-canonical Wnt signaling. Mechanistically, activation of Cdc42 induces expression of molecules involved in stem cell identity and anchorage to the niche. Strikingly, during a demyelination injury, downregulation of non-canonical Wnt-dependent Cdc42 activity is necessary to promote activation and lineage progression of quiescent NSCs, thereby initiating the process of tissue repair. Following demyelination injury, neural stem cells (NSCs) in the subventricular zone switch to an activated state. Here, the authors show that a transient shift from non-canonical to canonical Wnt signaling is necessary for activation of quiescent NSCs to achieve tissue homeostasis and brain repair.
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102
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Wnt Signaling in Hematological Malignancies. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 153:321-341. [PMID: 29389522 DOI: 10.1016/bs.pmbts.2017.11.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Leukemia and lymphoma are a wide encompassing term for a diverse set of blood malignancies that affect people of all ages and result in approximately 23,000 deaths in the United States per year (Siegel RL, Miller KD, Jemal A. Cancer statistics, 2016. CA Cancer J Clin. 2016;66(1):7-30.). Hematopoietic stem cells (HSCs) are tissue-specific stem cells at the apex of the hierarchy that gives rise to all of the terminally differentiated blood cells, through progressively restricted progenitor populations, a process that is known to be Wnt-responsive. In particular, the progenitor populations are subject to uncontrolled expansion during oncogenic processes, namely the common myeloid progenitor and common lymphoid progenitor, as well as the myeloblast and lymphoblast. Unregulated growth of these cell-types leads to mainly three types of blood cancers (i.e., leukemia, lymphoma, and myeloma), which frequently exhibit deregulation of the Wnt signaling pathway. Generally, leukemia is caused by the expansion of myeloid progenitors, leading to an overproduction of white blood cells; as such, patients are unable to make sufficient numbers of red blood cells and platelets. Likewise, an overproduction of lymphocytes leads to clogging of the lymph system and impairment of the immune system in lymphomas. Finally, cancer of the plasma cells in the blood is called myeloma, which also leads to immune system failure. Within each of these three types of blood cancers, there are multiple subtypes, usually characterized by their timeline of onset and their cell type of origin. Of these, 85% of leukemias are encompassed by the four most common diseases, that is, acute myeloid leukemia (AML), chronic myeloid leukemia (CML), acute lymphoblastic leukemia (ALL), and chronic lymphocytic leukemia (CLL); AML accounts for the majority of leukemia-related deaths (Siegel RL, Miller KD, Jemal A. Cancer statistics, 2016. CA Cancer J Clin. 2016;66(1):7-30.). Through understanding how HSCs are normally developed and maintained, we can understand how the normal functions of these pathways are disrupted during blood cancer progression; the Wnt pathway is important in regulation of both normal and malignant hematopoiesis. In this chapter, we will discuss the role of Wnt signaling in normal and aberrant hematopoiesis. Our understanding the relationship between Wnt and HSCs will provide novel insights into therapeutic targets.
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103
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Rossmann MP, Orkin SH, Chute JP. Hematopoietic Stem Cell Biology. Hematology 2018. [DOI: 10.1016/b978-0-323-35762-3.00009-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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104
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Zhu N, Huang K, Liu Y, Zhang H, Lin E, Zeng Y, Li H, Xu Y, Cai B, Yuan Y, Li Y, Lin C. miR-195-5p Regulates Hair Follicle Inductivity of Dermal Papilla Cells by Suppressing Wnt/ β-Catenin Activation. BIOMED RESEARCH INTERNATIONAL 2018; 2018:4924356. [PMID: 29850524 PMCID: PMC5937601 DOI: 10.1155/2018/4924356] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/11/2018] [Accepted: 03/05/2018] [Indexed: 02/05/2023]
Abstract
Dermal papilla (DP) cells play a vital role in hair follicle (HF) development and postnatal hair cycling. However, the abilities are lost on further culture. Recent studies have demonstrated significant influences of posttranscriptional regulation by microRNA (miRNA) on HF development. The current study aims to investigate how miRNAs regulate Wnt/β-catenin to control HF inductivity of DP cells by performing microarray analysis in early- and late-passage DP cells and transfecting with miRNAs inhibitor or mimic. Results showed early-passage DP cells strongly expressed miRNAs related to inhibition of noncanonical Wnt pathways. In late-passage DP cells, miRNAs capable of inhibiting the canonical Wnt/β-catenin pathway were upregulated, in addition to the miRNAs targeting the noncanonical Wnt pathway. Moreover, we verified that β-catenin expression was downregulated by miR-195-5p overexpression in dose manner. Meanwhile LRP6 expression was downregulated in both protein and mRNA as well as the genes involved in the hair inductivity of DP cells. These results suggest that the appearance of miRNAs that suppress the Wnt/β-catenin pathway may be responsible for the loss of ability of DP cells in culture and miR-195-5p is the potential key factor involved in regulating HF inductivity of DP cells.
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Affiliation(s)
- Ningxia Zhu
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, Guangxi 541004, China
- Department of Cardiology, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Keng Huang
- Department of Emergency, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Yang Liu
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Huan Zhang
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - En Lin
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Yang Zeng
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Haihong Li
- Department of Burn and Plastic Surgery, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515000, China
| | - Yanming Xu
- Department of Cell Biology, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Bozhi Cai
- Tissue Engineering Laboratory, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Yanping Yuan
- Tissue Engineering Laboratory, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Yu Li
- Tissue Engineering Laboratory, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Changmin Lin
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong 515041, China
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105
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Suppression of SRCAP chromatin remodelling complex and restriction of lymphoid lineage commitment by Pcid2. Nat Commun 2017; 8:1518. [PMID: 29138493 PMCID: PMC5686073 DOI: 10.1038/s41467-017-01788-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 10/16/2017] [Indexed: 12/31/2022] Open
Abstract
Lymphoid lineage commitment is an important process in haematopoiesis, which forms the immune system to protect the host from pathogen invasion. However, how multipotent progenitors (MPP) switch into common lymphoid progenitors (CLP) or common myeloid progenitors (CMP) during this process remains elusive. Here we show that PCI domain-containing protein 2 (Pcid2) is highly expressed in MPPs. Pcid2 deletion in the haematopoietic system causes skewed lymphoid lineage specification. In MPPs, Pcid2 interacts with the Zinc finger HIT-type containing 1 (ZNHIT1) to block Snf2-related CREBBP activator protein (SRCAP) activity and prevents the deposition of histone variant H2A.Z and transcription factor PU.1 to key lymphoid fate regulator genes. Furthermore, Znhit1 deletion also abrogates H2A/H2A.Z exchange in MPPs. Thus Pcid2 controls lymphoid lineage commitment through the regulation of SRCAP remodelling activity.
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106
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Racioppi L, Lento W, Huang W, Arvai S, Doan PL, Harris JR, Marcon F, Nakaya HI, Liu Y, Chao N. Calcium/calmodulin-dependent kinase kinase 2 regulates hematopoietic stem and progenitor cell regeneration. Cell Death Dis 2017; 8:e3076. [PMID: 28981105 PMCID: PMC5680595 DOI: 10.1038/cddis.2017.474] [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: 07/02/2017] [Revised: 08/04/2017] [Accepted: 08/09/2017] [Indexed: 12/25/2022]
Abstract
Hematopoietic stem and progenitor cells (HSPCs) are predominantly quiescent in adults, but proliferate in response to bone marrow (BM) injury. Here, we show that deletion of Ca2+/calmodulin (CaM)-dependent protein kinase kinase 2 (CaMKK2) promotes HSPC regeneration and hematopoietic recovery following radiation injury. Using Camkk2-enhanced green fluorescent protein (EGFP) reporter mice, we found that Camkk2 expression is developmentally regulated in HSPC. Deletion of Camkk2 in HSPC results in a significant downregulation of genes affiliated with the quiescent signature. Accordingly, HSPC from Camkk2 null mice have a high proliferative capability when stimulated in vitro in the presence of BM-derived endothelial cells. In addition, Camkk2 null mice are more resistant to radiation injury and show accelerated hematopoietic recovery, enhanced HSPC regeneration and ultimately a prolonged survival following sublethal or lethal total body irradiation. Mechanistically, we propose that CaMKK2 regulates the HSPC response to hematopoietic damage by coupling radiation signaling to activation of the anti-proliferative AMP-activated protein kinase. Finally, we demonstrated that systemic administration of the small molecule CaMKK2 inhibitor, STO-609, to irradiated mice enhanced HSPC recovery and improved survival. These findings identify CaMKK2 as an important regulator of HSPC regeneration and demonstrate CaMKK2 inhibition is a novel approach to promoting hematopoietic recovery after BM injury.
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Affiliation(s)
- Luigi Racioppi
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA.,Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - William Lento
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Wei Huang
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Stephanie Arvai
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Phuong L Doan
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Jeffrey R Harris
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Fernando Marcon
- Department of Pathophysiology and Toxicology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Helder I Nakaya
- Department of Pathophysiology and Toxicology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Yaping Liu
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Nelson Chao
- Division of Hematological Malignancies and Cellular Therapy, Department of Medicine, Duke University Medical Center, Durham, NC, USA
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107
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Arulmozhivarman G, Kräter M, Wobus M, Friedrichs J, Bejestani EP, Müller K, Lambert K, Alexopoulou D, Dahl A, Stöter M, Bickle M, Shayegi N, Hampe J, Stölzel F, Brand M, von Bonin M, Bornhäuser M. Zebrafish In-Vivo Screening for Compounds Amplifying Hematopoietic Stem and Progenitor Cells: - Preclinical Validation in Human CD34+ Stem and Progenitor Cells. Sci Rep 2017; 7:12084. [PMID: 28935977 PMCID: PMC5608703 DOI: 10.1038/s41598-017-12360-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 09/08/2017] [Indexed: 01/13/2023] Open
Abstract
The identification of small molecules that either increase the number and/or enhance the activity of human hematopoietic stem and progenitor cells (hHSPCs) during ex vivo expansion remains challenging. We used an unbiased in vivo chemical screen in a transgenic (c-myb:EGFP) zebrafish embryo model and identified histone deacetylase inhibitors (HDACIs), particularly valproic acid (VPA), as significant enhancers of the number of phenotypic HSPCs, both in vivo and during ex vivo expansion. The long-term functionality of these expanded hHSPCs was verified in a xenotransplantation model with NSG mice. Interestingly, VPA increased CD34+ cell adhesion to primary mesenchymal stromal cells and reduced their in vitro chemokine-mediated migration capacity. In line with this, VPA-treated human CD34+ cells showed reduced homing and early engraftment in a xenograft transplant model, but retained their long-term engraftment potential in vivo, and maintained their differentiation ability both in vitro and in vivo. In summary, our data demonstrate that certain HDACIs lead to a net expansion of hHSPCs with retained long-term engraftment potential and could be further explored as candidate compounds to amplify ex-vivo engineered peripheral blood stem cells.
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Affiliation(s)
| | - Martin Kräter
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany
| | - Manja Wobus
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany
| | - Jens Friedrichs
- Institute of Biofunctional Polymer Materials, Leibniz Institute for Polymer Research, Max Bergmann Center of Biomaterials, Dresden, Germany
| | - Elham Pishali Bejestani
- German Cancer Research Center (DKFZ), Heidelberg, Germany.,German Consortium for Translational Cancer Research (DKTK), partner site, Dresden, Germany
| | - Katrin Müller
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany
| | - Katrin Lambert
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany
| | - Dimitra Alexopoulou
- Deep Sequencing Group SFB655, Biotechnology Center, Technical University of Dresden, Dresden, Germany
| | - Andreas Dahl
- Deep Sequencing Group SFB655, Biotechnology Center, Technical University of Dresden, Dresden, Germany
| | - Martin Stöter
- Max-Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Marc Bickle
- Max-Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Nona Shayegi
- Department of Hematology, University Hospital Essen, University of Duisburg, Essen, Germany
| | - Jochen Hampe
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany
| | - Friedrich Stölzel
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany
| | - Michael Brand
- DFG-Center for Regenerative Therapies Dresden (CRTD) - Cluster of Excellence, Technical University of Dresden, Dresden, Germany.
| | - Malte von Bonin
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,German Consortium for Translational Cancer Research (DKTK), partner site, Dresden, Germany
| | - Martin Bornhäuser
- Department of Hematology/Oncology, Medical Clinic and Policlinic I, University Hospital, Dresden, Germany. .,DFG-Center for Regenerative Therapies Dresden (CRTD) - Cluster of Excellence, Technical University of Dresden, Dresden, Germany.
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108
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Kumar S, Geiger H. HSC Niche Biology and HSC Expansion Ex Vivo. Trends Mol Med 2017; 23:799-819. [PMID: 28801069 DOI: 10.1016/j.molmed.2017.07.003] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 02/08/2023]
Abstract
Hematopoietic stem cell (HSC) transplantation can restore a new functional hematopoietic system in recipients in cases where the system of the recipient is not functional or for example is leukemic. However, the number of available donor HSCs is often too low for successful transplantation. Expansion of HSCs and thus HSC self-renewal ex vivo would greatly improve transplantation therapy in the clinic. In vivo, HSCs expand significantly in the niche, but establishing protocols that result in HSC expansion ex vivo remains challenging. In this review we discuss current knowledge of niche biology, the intrinsic regulators of HSC self-renewal in vivo, and introduce novel niche-informed strategies of HSC expansion ex vivo.
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Affiliation(s)
- Sachin Kumar
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH 45229, USA.
| | - Hartmut Geiger
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation, Cincinnati, OH 45229, USA; Institute of Molecular Medicine, Ulm University, Ulm, Germany; Aging Research Center, Ulm University, Ulm, Germany.
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109
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Abidin BM, Hammami A, Stäger S, Heinonen KM. Infection-adapted emergency hematopoiesis promotes visceral leishmaniasis. PLoS Pathog 2017; 13:e1006422. [PMID: 28787450 PMCID: PMC5560750 DOI: 10.1371/journal.ppat.1006422] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 08/17/2017] [Accepted: 05/22/2017] [Indexed: 12/12/2022] Open
Abstract
Cells of the immune system are derived from hematopoietic stem cells (HSCs) residing in the bone marrow. HSCs become activated in response to stress, such as acute infections, which adapt the bone marrow output to the needs of the immune response. However, the impact of infection-adapted HSC activation and differentiation on the persistence of chronic infections is poorly understood. We have examined here the bone marrow outcome of chronic visceral leishmaniasis and show that the parasite Leishmania donovani induces HSC expansion and skews their differentiation towards non-classical myeloid progenitors with a regulatory phenotype. Our results further suggest that emergency hematopoiesis contributes to the pathogenesis of visceral leishmaniasis, as decreased HSC expansion results in a lower parasite burden. Conversely, monocytes derived in the presence of soluble factors from the infected bone marrow environment are more permissive to infection by Leishmania. Our results demonstrate that L. donovani is able to subvert host bone marrow emergency responses to facilitate parasite persistence, and put forward hematopoiesis as a novel therapeutic target in chronic infections. Hematopoietic stem cells (HSCs) are responsible for the generation of all blood cells and thus play an important but often underappreciated role in the host response to infections. HSCs are normally dormant, but they can become activated in response to stress, such as infections. This stress response is meant to generate more blood cells and help the body to eliminate the invading pathogen. We have studied here the activation of HSCs in a mouse model of chronic infection with the parasite Leishmania donovani. We found that the parasite efficiently activates HSCs and steers them to produce large numbers of specific blood cells that are among the preferred targets of the parasite and become even more susceptible to infection when produced within the diseased environment. Using a mouse strain in which HSC activation cannot be sustained, we found that diminished HSC activity correlated with decreased parasite numbers. We therefore propose that HSC activation by the parasite promotes the infection and could be used as a new target for treatment.
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Affiliation(s)
- Belma Melda Abidin
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
| | - Akil Hammami
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
| | - Simona Stäger
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
- Centre for Host-Parasite interactions, Laval, Québec, Canada
| | - Krista M. Heinonen
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
- Centre for Host-Parasite interactions, Laval, Québec, Canada
- * E-mail:
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110
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Morikawa T, Takubo K. Use of Imaging Techniques to Illuminate Dynamics of Hematopoietic Stem Cells and Their Niches. Front Cell Dev Biol 2017; 5:62. [PMID: 28660186 PMCID: PMC5468376 DOI: 10.3389/fcell.2017.00062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 05/24/2017] [Indexed: 01/01/2023] Open
Abstract
Continuous generation of blood cells over an organism's lifetime is supported by hematopoietic stem/progenitor cells (HSPCs) capable of producing all hematopoietic cell subtypes. Adult mammalian HSPCs are localized to bone marrow and regulated by their neighboring microenvironment, or "niche." Because interactions of HSPCs with their niches are highly dynamic and complex, the recent development of imaging technologies provides a powerful new tool to understand stem cell/niche biology. In this review, we discuss recent advances in our understanding of dynamic HSPC/niche interactions during development, homeostasis, disease states or aging with a focus on studies advanced by imaging analysis. We also summarize methods to visualize HSPCs and niche cells in vivo, including use of HSPC reporter mice and chemical probes. Findings emerging from these investigations could suggest novel therapies for diseases and aging.
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Affiliation(s)
| | - Keiyo Takubo
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and MedicineTokyo, Japan
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111
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Abstract
Stem cell niches are specialized microenvironments that promote the maintenance of stem cells and regulate their function. Recent advances have improved our understanding of the niches that maintain adult haematopoietic stem cells (HSCs). These advances include new markers for HSCs and niche cells, systematic analyses of the expression patterns of niche factors, genetic tools for functionally identifying niche cells in vivo, and improved imaging techniques. Together, they have shown that HSC niches are perivascular in the bone marrow and spleen. Endothelial cells and mesenchymal stromal cells secrete factors that promote HSC maintenance in these niches, but other cell types also directly or indirectly regulate HSC niches.
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112
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Lee Y, Decker M, Lee H, Ding L. Extrinsic regulation of hematopoietic stem cells in development, homeostasis and diseases. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2017; 6. [PMID: 28561893 DOI: 10.1002/wdev.279] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 03/18/2017] [Accepted: 04/14/2017] [Indexed: 02/04/2023]
Abstract
Lifelong generation of blood and immune cells depends on hematopoietic stem cells (HSCs). Their function is precisely regulated by complex molecular networks that integrate and respond to ever changing physiological demands of the body. Over the past several years, significant advances have been made in understanding the extrinsic regulation of HSCs during development and in homeostasis. Propelled by technical advances in the field, the cellular and molecular components of the microenvironment that support HSCs in vivo are emerging. In addition, the interaction of HSCs with their niches is appreciated as a critical contributor to the pathogenesis of a number of hematologic disorders. Here, we review these advances in detail and highlight the extrinsic regulation of HSCs in the context of development, homeostasis, and diseases. WIREs Dev Biol 2017, 6:e279. doi: 10.1002/wdev.279 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Yeojin Lee
- Department of Rehabilitation and Regenerative Medicine, Department of Microbiology and Immunology, Columbia Stem Cell Initiative, Columbia University Medical Center, New York, NY, USA
| | - Matthew Decker
- Department of Rehabilitation and Regenerative Medicine, Department of Microbiology and Immunology, Columbia Stem Cell Initiative, Columbia University Medical Center, New York, NY, USA
| | - Heather Lee
- Department of Rehabilitation and Regenerative Medicine, Department of Microbiology and Immunology, Columbia Stem Cell Initiative, Columbia University Medical Center, New York, NY, USA
| | - Lei Ding
- Department of Rehabilitation and Regenerative Medicine, Department of Microbiology and Immunology, Columbia Stem Cell Initiative, Columbia University Medical Center, New York, NY, USA
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113
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Masamoto Y, Arai S, Sato T, Kubota N, Takamoto I, Kadowaki T, Kurokawa M. Adiponectin Enhances Quiescence Exit of Murine Hematopoietic Stem Cells and Hematopoietic Recovery Through mTORC1 Potentiation. Stem Cells 2017; 35:1835-1848. [PMID: 28480607 DOI: 10.1002/stem.2640] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 04/11/2017] [Accepted: 04/25/2017] [Indexed: 01/19/2023]
Abstract
Myelotoxic injury, such as chemotherapeutic agents and ionizing radiation, unlocks the vigorous power of hematopoietic stem cells (HSCs) to replenish the hematopoietic system, making quiescent HSCs enter the cell cycle. Considering that both HSC-intrinsic and -extrinsic mechanisms enforce quiescence of HSCs, the drastic change in bone marrow (BM) environment after injury, represented by massive expansion of BM adipocytes, might trigger HSC activation. BM adipocytes, the major cellular component in the ablated marrow, however, reportedly suppress proliferation of hematopoietic cells, which may indicate the BM adipocytogenesis is an irrational response of injured organism. Given that adipose tissue is an endocrine organ with pleiotropic functions, we hypothesized that adipocyte-derived factors, especially adiponectin, an anti-inflammatory adipokine involved in regulation of granulopoiesis, are implicated in HSC activation. Myeloablative intervention increased BM adiponectin by multiple mechanisms, including adipocyte expansion and increased diffusion from the blood. Adiponectin-null (Adipoq -/- ) mice showed delayed hematopoietic recovery after BM injury, with Adipoq-/- HSCs more quiescent and defective in mammalian target of rapamycin complex 1 (mTORC1) activation. Recombinant adiponectin promoted not only HSC activation in vivo but cytokine-induced activation in vitro, and shortened the time for exit from quiescence in an mTORC1-dependent manner. These data illustrate a scarcely-reported example of a cell-extrinsic factor, adiponectin, enhancing quiescence exit of HSCs, and subsequent hematopoietic recovery. Our findings also highlight adipocytes as a source of adiponectin to ensure the proliferative burst of hematopoietic cells in ablated marrow. Stem Cells 2017;35:1835-1848.
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Affiliation(s)
- Yosuke Masamoto
- Department of Hematology & Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Department of Transfusion Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Shunya Arai
- Department of Hematology & Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tomohiko Sato
- Department of Hematology & Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Department of Transfusion Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | - Naoto Kubota
- Department of Diabetes & Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Iseki Takamoto
- Department of Diabetes & Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takashi Kadowaki
- Department of Diabetes & Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mineo Kurokawa
- Department of Hematology & Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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114
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Zhao Y, Wu K, Nguyen C, Smbatyan G, Melendez E, Higuchi Y, Chen Y, Kahn M. Small molecule p300/catenin antagonist enhances hematopoietic recovery after radiation. PLoS One 2017; 12:e0177245. [PMID: 28486541 PMCID: PMC5423697 DOI: 10.1371/journal.pone.0177245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 04/24/2017] [Indexed: 12/26/2022] Open
Abstract
There is currently no FDA approved therapeutic agent for ARS mitigation post radiation exposure. Here we report that the small molecule YH250, which specifically antagonizes p300/catenin interaction, stimulates hematopoiesis in lethally or sublethally irradiated mice. A single administration of YH250 24 hours post irradiation can significantly stimulate HSC proliferation, improve survival and accelerate peripheral blood count recovery. Our studies suggest that promotion of the expansion of the remaining HSC population via stimulation of symmetric non-differentiative proliferation is at least part of the mechanism of action.
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Affiliation(s)
- Yi Zhao
- Department of Medicine, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
- Center for Molecular Pathways and Drug Discovery, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
| | - Kaijin Wu
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Research Center, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
| | - Cu Nguyen
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Research Center, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
| | - Goar Smbatyan
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Research Center, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
| | - Elisabeth Melendez
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Research Center, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
| | - Yusuke Higuchi
- Center for Molecular Pathways and Drug Discovery, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Research Center, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
- Department of Organic Fine Chemicals, The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan
| | - Yibu Chen
- Bioinformatics Service Program, Norris Medical Library, University of Southern California, Los Angeles, California, United States of America
| | - Michael Kahn
- Center for Molecular Pathways and Drug Discovery, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Research Center, Keck School of Medicine of University of Southern California, Los Angeles, California, United States of America
- Department of Molecular Pharmacology and Toxicology, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
- * E-mail:
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115
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Hira VVV, Van Noorden CJF, Carraway HE, Maciejewski JP, Molenaar RJ. Novel therapeutic strategies to target leukemic cells that hijack compartmentalized continuous hematopoietic stem cell niches. Biochim Biophys Acta Rev Cancer 2017; 1868:183-198. [PMID: 28363872 DOI: 10.1016/j.bbcan.2017.03.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/26/2017] [Accepted: 03/27/2017] [Indexed: 02/06/2023]
Abstract
Acute myeloid leukemia and acute lymphoblastic leukemia cells hijack hematopoietic stem cell (HSC) niches in the bone marrow and become leukemic stem cells (LSCs) at the expense of normal HSCs. LSCs are quiescent and resistant to chemotherapy and can cause relapse of the disease. HSCs in niches are needed to generate blood cell precursors that are committed to unilineage differentiation and eventually production of mature blood cells, including red blood cells, megakaryocytes, myeloid cells and lymphocytes. Thus far, three types of HSC niches are recognized: endosteal, reticular and perivascular niches. However, we argue here that there is only one type of HSC niche, which consists of a periarteriolar compartment and a perisinusoidal compartment. In the periarteriolar compartment, hypoxia and low levels of reactive oxygen species preserve the HSC pool. In the perisinusoidal compartment, hypoxia in combination with higher levels of reactive oxygen species enables proliferation of progenitor cells and their mobilization into the circulation. Because HSC niches offer protection to LSCs against chemotherapy, we review novel therapeutic strategies to inhibit homing of LSCs in niches for the prevention of dedifferentiation of leukemic cells into LSCs and to stimulate migration of leukemic cells out of niches. These strategies enhance differentiation and proliferation and thus sensitize leukemic cells to chemotherapy. Finally, we list clinical trials of therapies that tackle LSCs in HSC niches to circumvent their protection against chemotherapy.
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Affiliation(s)
- Vashendriya V V Hira
- Department of Medical Biology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands; Division of Neurobiology, Barrow Brain Tumor Research Center, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ 85013, USA.
| | - Cornelis J F Van Noorden
- Department of Medical Biology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
| | - Hetty E Carraway
- Department of Translational Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA; Leukemia Program, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
| | - Jaroslaw P Maciejewski
- Department of Translational Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
| | - Remco J Molenaar
- Department of Medical Biology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands; Department of Translational Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
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116
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Fernández-Iglesias A, Gracia-Sancho J. How to Face Chronic Liver Disease: The Sinusoidal Perspective. Front Med (Lausanne) 2017; 4:7. [PMID: 28239607 PMCID: PMC5300981 DOI: 10.3389/fmed.2017.00007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 01/19/2017] [Indexed: 12/20/2022] Open
Abstract
Liver microcirculation plays an essential role in the progression and aggravation of chronic liver disease. Hepatic sinusoid environment, mainly composed by hepatocytes, liver sinusoidal endothelial cells, Kupffer cells, and hepatic stellate cells, intimately cooperate to maintain global liver function and specific phenotype of each cell type. However, continuous liver injury significantly deregulates liver cells protective phenotype, leading to parenchymal and non-parenchymal dysfunction. Recent data have enlightened the molecular processes that mediate hepatic microcirculatory injury, and consequently, opened the possibility to develop new therapeutic strategies to ameliorate liver circulation and viability. The present review summarizes the main cellular components of the hepatic sinusoid, to afterward focus on non-parenchymal cells phenotype deregulation due to chronic injury, in the specific clinical context of liver cirrhosis and derived portal hypertension. Finally, we herein detail new therapies developed at the bench-side with high potential to be translated to the bedside.
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Affiliation(s)
- Anabel Fernández-Iglesias
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Laboratory, IDIBAPS Biomedical Research Institute – CIBEREHD, Barcelona, Spain
| | - Jordi Gracia-Sancho
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Laboratory, IDIBAPS Biomedical Research Institute – CIBEREHD, Barcelona, Spain
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117
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Numerous niches for hematopoietic stem cells remain empty during homeostasis. Blood 2017; 129:2124-2131. [PMID: 28130213 DOI: 10.1182/blood-2016-09-740563] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 01/18/2017] [Indexed: 12/27/2022] Open
Abstract
Hematopoietic stem cells (HSCs) reside in and are maintained by special microenvironments, termed niches. It is assumed that the HSC niche space remains occupied by endogenous cells and that myelosuppressive conditioning is required to achieve high levels of HSC engraftment. We herein demonstrate that upon the transplantation of very large numbers of purified HSCs into normal mice not exposed to myeloablation, donor HSCs engrafted in niches distant from filled HSC niches without replacing host HSCs and subsequently proliferated and generated hematopoietic progenitors, leading to marked increases in the overall HSC numbers in bone marrow. Additionally, stem cell factor that is produced by CXC chemokine ligand 12-abundant reticular cells is involved in HSC engraftment. In contrast, host granulocyte/macrophage progenitors (GMPs) were replaced by the progeny of transplanted donor HSCs, and overall GMP numbers remained unchanged. Thus, inconsistent with the classical concept, numerous empty HSC niches are available for engraftment and proliferation in bone marrow.
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118
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Enhanced targeting of CML stem and progenitor cells by inhibition of porcupine acyltransferase in combination with TKI. Blood 2016; 129:1008-1020. [PMID: 28011678 DOI: 10.1182/blood-2016-05-714089] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 12/16/2016] [Indexed: 12/22/2022] Open
Abstract
Tyrosine kinase inhibitor (TKI) treatment of chronic myeloid leukemia (CML) has limited efficacy against leukemia stem cells (LSC) responsible for disease propagation, and most CML patients require continued TKI treatment to maintain remission. LSC maintenance is related, at least in part, to signals from the bone marrow microenvironment (BMM). Our previous studies have shown that Wnt signaling from the BMM contributes to preservation of CML LSC following TKI treatment. Secretion of Wnt ligands requires their modification by the O-acyl transferase Porcupine (PORCN). Here we investigated the activity of a potent and selective PORCN inhibitor, WNT974, against CML stem and progenitor cells. WNT974 efficiently antagonized Wnt signaling in human CML CD34+ cells, and in combination with the TKI nilotinib (NIL) significantly enhanced inhibition of proliferation and colony-forming potential of CML stem and progenitor cells and reduced their growth in immunodeficient mice in vivo, in comparison with NIL alone. Treatment of transgenic CML mice in vivo with NIL in combination with WNT974 significantly reduced leukemic stem and progenitor cell numbers, reduced regeneration of leukemic long-term hematopoietic stem cells in secondary transplant recipients, and enhanced survival of mice after discontinuation of treatment, in comparison with NIL alone. CML progenitors demonstrated enhanced sensitivity to Wnt stimulation, associated with increased expression of the FZD4 receptor. FZD4 knockdown inhibited CML progenitor growth. These results support further investigation of PORCN targeting to inhibit Wnt secretion and signaling and enhance targeting of CML stem cells while sparing their normal counterparts.
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119
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The non-canonical Wnt receptor Ryk regulates hematopoietic stem cell repopulation in part by controlling proliferation and apoptosis. Cell Death Dis 2016; 7:e2479. [PMID: 27882948 PMCID: PMC5260899 DOI: 10.1038/cddis.2016.380] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/17/2016] [Accepted: 10/18/2016] [Indexed: 12/27/2022]
Abstract
The development of blood and immune cells requires strict control by various signaling pathways in order to regulate self-renewal, differentiation and apoptosis in stem and progenitor cells. Recent evidence indicates critical roles for the canonical and non-canonical Wnt pathways in hematopoiesis. The non-canonical Wnt pathway is important for establishment of cell polarity and cell migration and regulates apoptosis in the thymus. We here investigate the role of the non-canonical Wnt receptor Ryk in hematopoiesis and lymphoid development. We show that there are dynamic changes in Ryk expression during development and in different hematopoietic tissues. Functionally, Ryk regulates NK cell development in a temporal fashion. Moreover, Ryk-deficient mice show diminished, but not absent self-renewal of hematopoietic stem cells (HSC), via effects on mildly increased proliferation and apoptosis. Thus, Ryk deficiency in HSCs from fetal liver reduces their quiescence, leading to proliferation-induced apoptosis and decreased self-renewal.
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120
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Gu H, Chen C, Hao X, Wang C, Zhang X, Li Z, Shao H, Zeng H, Yu Z, Xie L, Xia F, Zhang F, Liu X, Zhang Y, Jiang H, Zhu J, Wan J, Wang C, Weng W, Xie J, Tao M, Zhang CC, Liu J, Chen GQ, Zheng J. Sorting protein VPS33B regulates exosomal autocrine signaling to mediate hematopoiesis and leukemogenesis. J Clin Invest 2016; 126:4537-4553. [PMID: 27797340 DOI: 10.1172/jci87105] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 09/22/2016] [Indexed: 12/23/2022] Open
Abstract
Certain secretory proteins are known to be critical for maintaining the stemness of stem cells through autocrine signaling. However, the processes underlying the biogenesis, maturation, and secretion of these proteins remain largely unknown. Here we demonstrate that many secretory proteins produced by hematopoietic stem cells (HSCs) undergo exosomal maturation and release that is controlled by vacuolar protein sorting protein 33b (VPS33B). Deletion of VPS33B in either mouse or human HSCs resulted in impaired exosome maturation and secretion as well as loss of stemness. Additionally, VPS33B deficiency led to a dramatic delay in leukemogenesis. Exosomes purified from either conditioned medium or human plasma could partially rescue the defects of HSCs and leukemia-initiating cells (LICs). VPS33B co-existed in exosomes with GDI2, VPS16B, FLOT1, and other known exosome markers. Mechanistically, VPS33B interacted with the GDI2/RAB11A/RAB27A pathway to regulate the trafficking of secretory proteins as exosomes. These findings reveal an essential role for VPS33B in exosome pathways in HSCs and LICs. Moreover, they shed light on the understanding of vesicle trafficking in other stem cells and on the development of improved strategies for cancer treatment.
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121
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Gonzalez-Fernandez C, Arevalo-Martin A, Paniagua-Torija B, Ferrer I, Rodriguez FJ, Garcia-Ovejero D. Wnts Are Expressed in the Ependymal Region of the Adult Spinal Cord. Mol Neurobiol 2016; 54:6342-6355. [PMID: 27722925 DOI: 10.1007/s12035-016-0132-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/14/2016] [Indexed: 12/21/2022]
Abstract
The Wnt family of proteins plays key roles during central nervous system development and in several physiological processes during adulthood. Recently, experimental evidence has linked Wnt-related genes to regulation and maintenance of stem cells in the adult neurogenic niches. In the spinal cord, the ependymal cells surrounding the central canal form one of those niches, but little is known about their Wnt expression patterns. Using microdissection followed by TaqMan® low-density arrays, we show here that the ependymal regions of young, mature rats and adult humans express several Wnt-related genes, including ligands, conventional and non-conventional receptors, co-receptors, and soluble inhibitors. We found 13 genes shared between rats and humans, 4 exclusively expressed in rats and 9 expressed only in humans. Also, we observed a reduction with age on spontaneous proliferation of ependymal cells in rats paralleled by a decrease in the expression of Fzd1, Fzd8, and Fzd9. Our results suggest a role for Wnts in the regulation of the adult spinal cord neurogenic niche and provide new data on the specific differences in this region between humans and rodents.
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Affiliation(s)
- Carlos Gonzalez-Fernandez
- Laboratory of Molecular Neurology, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Angel Arevalo-Martin
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Beatriz Paniagua-Torija
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Isidro Ferrer
- Institut de Neuropatologia, Serveid'AnatomiaPatològica, IDIBELL-Hospital Universitari de Bellvitge, Universitat de Barcelona, L'Hospitalet de Llobregat, Spain
| | - Francisco J Rodriguez
- Laboratory of Molecular Neurology, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain.
| | - Daniel Garcia-Ovejero
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Finca La Peraleda s/n, 45071, Toledo, Spain.
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122
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Chattopadhyay S, Chatterjee R, Law S. Noncanonical Wnt5a-Ca(2+) -NFAT signaling axis in pesticide induced bone marrow aplasia mouse model: A study to explore the novel mechanism of pesticide toxicity. ENVIRONMENTAL TOXICOLOGY 2016; 31:1163-1175. [PMID: 25846497 DOI: 10.1002/tox.22123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 01/13/2015] [Accepted: 01/24/2015] [Indexed: 06/04/2023]
Abstract
According to case-control studies, long-term pesticide exposure can cause bone marrow aplasia like hematopoietic degenerative disease leading to impaired hematopoiesis and increased risk of aplastic anemia in human subjects. However, the exact mechanism of pesticide mediated hematotoxicity still remains elusive. In this study, we investigated the role of noncanonical Wnt signaling pathway, a crucial regulator of adult hematopoiesis, in pesticide induced bone marrow aplasia mouse model. Aplasia mouse model was developed following inhalation and dermal exposure of 5% aqueous mixture of common agriculturally used pesticides for 6 h/day for 5 days a week up to 90 days. After that, blood hemogram, marrow smear, cellularity, scanning electron microscopy, extramedullary hematopoiesis and flowcytometric expression analysis of noncanonical Wnt signaling components, such as Wnt 5a, fzd5, NFAT, IFN-γ, intracellular Ca(2+) level were evaluated in the bone marrow hematopoietic stem/progenitor compartment of the control and pesticide induced aplasia groups of animals. Results showed that pesticide exposed mice were anemic with peripheral blood pancytopenia, hypocellular degenerative marrow, and extramedullary hematopoiesis in the spleen. Upon pesticide exposure, Wnt 5a expression was severely downregulated with a decline in intracellular Ca(2+) level. Moreover, downstream of Wnt5a, we observed sharp downregulation of NFATc2 transcription factor expression, the major target of pesticide toxicity and its target molecule IFN-γ. Taken together, our result suggests that deregulation of Wnt5a-Ca(2+) -NFAT signaling axis in the hematopoietic stem/progenitor compartment plays a crucial role behind the pathogenesis of pesticide mediated bone marrow aplasia by limiting primitive hematopoietic stem cells' ability to maintain hematopoietic homeostasis and reconstitution mechanism in vivo during xenobiotic stress leading to ineffective hematopoiesis and evolution of bone marrow aplasia. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1163-1175, 2016.
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Affiliation(s)
- Sukalpa Chattopadhyay
- Stem Cell Research and Application Unit, Department of Biochemistry and Medical Biotechnology, Calcutta School of Tropical Medicine, 108, C.R. Avenue, Kolkata, 700073, West Bengal, India
| | - Ritam Chatterjee
- Stem Cell Research and Application Unit, Department of Biochemistry and Medical Biotechnology, Calcutta School of Tropical Medicine, 108, C.R. Avenue, Kolkata, 700073, West Bengal, India
| | - Sujata Law
- Stem Cell Research and Application Unit, Department of Biochemistry and Medical Biotechnology, Calcutta School of Tropical Medicine, 108, C.R. Avenue, Kolkata, 700073, West Bengal, India
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123
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Lopes CS, Daifalla N, Das B, Dias da Silva V, Campos-Neto A. CD271+ Mesenchymal Stem Cells as a Possible Infectious Niche for Leishmania infantum. PLoS One 2016; 11:e0162927. [PMID: 27622907 PMCID: PMC5021359 DOI: 10.1371/journal.pone.0162927] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 08/28/2016] [Indexed: 12/18/2022] Open
Abstract
Visceral leishmaniasis (VL) is a serious and fatal disease. Therapeutic drugs are toxic and non-sterilizing. The etiological agents Leishmania infantum and Leishmania donovani cause active and asymptomatic diseases. Effective drugs to treat VL exist but unfortunately, post-treatment relapses are common. Little is known why drugs are non-sterilizing or how these intracellular pathogens can escape treatment. Here, using a murine model of VL we found that CD271+/Sca1+ bone marrow mesenchymal stem cells (BM-MSCs) are readily infected in vitro and in vivo by L. infantum. Because BM-MSCs express potent drug efflux pumps, e.g., ABCG2 it is possible that this unique intracellular infectious niche could allow L. infantum to escape anti-parasite drugs.
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Affiliation(s)
- Carolina S. Lopes
- The Forsyth Institute, Cambridge Massachusetts, United States of America
- Department of Biochemistry, Pharmacology, Physiology and Molecular Biology, Institute for Biological and Natural Sciences, Triângulo Mineiro Federal University, Uberaba, MG, Brazil
| | - Nada Daifalla
- The Forsyth Institute, Cambridge Massachusetts, United States of America
| | - Bikul Das
- The Forsyth Institute, Cambridge Massachusetts, United States of America
| | - Valdo Dias da Silva
- Department of Biochemistry, Pharmacology, Physiology and Molecular Biology, Institute for Biological and Natural Sciences, Triângulo Mineiro Federal University, Uberaba, MG, Brazil
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124
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A portable platform for stepwise hematopoiesis from human pluripotent stem cells within PET-reinforced collagen sponges. Int J Hematol 2016; 104:647-660. [PMID: 27599982 DOI: 10.1007/s12185-016-2088-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 08/22/2016] [Accepted: 08/25/2016] [Indexed: 01/28/2023]
Abstract
Various systems for differentiating hematopoietic cells from human pluripotent stem cells (PSCs) have been developed, although none have been fully optimized. In this report, we describe the development of a novel three-dimensional system for differentiating hematopoietic cells from PSCs using collagen sponges (CSs) reinforced with poly(ethylene terephthalate) fibers as a scaffold. PSCs seeded onto CSs were differentiated in a stepwise manner with appropriate cytokines under serum-free and feeder-free conditions. This process yielded several lineages of floating hematopoietic cells repeatedly for more than 1 month. On immunohistochemical staining, we detected CD34+ cells and CD45+ cells in the surface and cavities of the CS. Taking advantage of the portability of this system, we were able to culture multiple CSs together floating in medium, making it possible to harvest large numbers of hematopoietic cells repeatedly. Given these findings, we suggest that this novel three-dimensional culture system may be useful in the large-scale culture of PSC-derived hematopoietic cells.
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125
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Ramasamy SK, Kusumbe AP, Itkin T, Gur-Cohen S, Lapidot T, Adams RH. Regulation of Hematopoiesis and Osteogenesis by Blood Vessel-Derived Signals. Annu Rev Cell Dev Biol 2016; 32:649-675. [PMID: 27576121 DOI: 10.1146/annurev-cellbio-111315-124936] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In addition to their conventional role as a versatile transport system, blood vessels provide signals controlling organ development, regeneration, and stem cell behavior. In the skeletal system, certain capillaries support perivascular osteoprogenitor cells and thereby control bone formation. Blood vessels are also a critical component of niche microenvironments for hematopoietic stem cells. Here we discuss key pathways and factors controlling endothelial cell behavior in bone, the role of vessels in osteogenesis, and the nature of vascular stem cell niches in bone marrow.
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Affiliation(s)
- Saravana K Ramasamy
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, D-48169 Münster, Germany; .,Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Anjali P Kusumbe
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, D-48169 Münster, Germany; .,Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Tomer Itkin
- Department of Immunology, The Weizmann Institute of Science, Rehovot, 76100, Israel;
| | - Shiri Gur-Cohen
- Department of Immunology, The Weizmann Institute of Science, Rehovot, 76100, Israel;
| | - Tsvee Lapidot
- Department of Immunology, The Weizmann Institute of Science, Rehovot, 76100, Israel;
| | - Ralf H Adams
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, D-48169 Münster, Germany; .,Faculty of Medicine, University of Münster, D-48149 Münster, Germany
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126
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Staal FJT. Wnt signalling meets epigenetics. Stem Cell Investig 2016; 3:38. [PMID: 27668245 DOI: 10.21037/sci.2016.08.01] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 08/03/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Frank J T Staal
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
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127
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Silberstein L, Goncalves KA, Kharchenko PV, Turcotte R, Kfoury Y, Mercier F, Baryawno N, Severe N, Bachand J, Spencer JA, Papazian A, Lee D, Chitteti BR, Srour EF, Hoggatt J, Tate T, Lo Celso C, Ono N, Nutt S, Heino J, Sipilä K, Shioda T, Osawa M, Lin CP, Hu GF, Scadden DT. Proximity-Based Differential Single-Cell Analysis of the Niche to Identify Stem/Progenitor Cell Regulators. Cell Stem Cell 2016; 19:530-543. [PMID: 27524439 DOI: 10.1016/j.stem.2016.07.004] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 04/08/2016] [Accepted: 07/07/2016] [Indexed: 01/17/2023]
Abstract
Physiological stem cell function is regulated by secreted factors produced by niche cells. In this study, we describe an unbiased approach based on the differential single-cell gene expression analysis of mesenchymal osteolineage cells close to, and further removed from, hematopoietic stem/progenitor cells (HSPCs) to identify candidate niche factors. Mesenchymal cells displayed distinct molecular profiles based on their relative location. We functionally examined, among the genes that were preferentially expressed in proximal cells, three secreted or cell-surface molecules not previously connected to HSPC biology-the secreted RNase angiogenin, the cytokine IL18, and the adhesion molecule Embigin-and discovered that all of these factors are HSPC quiescence regulators. Therefore, our proximity-based differential single-cell approach reveals molecular heterogeneity within niche cells and can be used to identify novel extrinsic stem/progenitor cell regulators. Similar approaches could also be applied to other stem cell/niche pairs to advance the understanding of microenvironmental regulation of stem cell function.
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Affiliation(s)
- Lev Silberstein
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Kevin A Goncalves
- Graduate Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA 02111, USA; Molecular Oncology Research Institute, Tufts Medical Center, Boston, MA 02111, USA
| | - Peter V Kharchenko
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department for Biomedical Informatics, Harvard Medical School, Boston, MA 02115, USA
| | - Raphael Turcotte
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02445, USA
| | - Youmna Kfoury
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Francois Mercier
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Ninib Baryawno
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Nicolas Severe
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Jacqueline Bachand
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Joel A Spencer
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Ani Papazian
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Dongjun Lee
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | | | | | - Jonathan Hoggatt
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Tiffany Tate
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | | | - Noriaki Ono
- School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Stephen Nutt
- Walter and Eliza Hall Research Institute, Parkville, VIC 3052, Australia
| | | | | | - Toshihiro Shioda
- Cancer Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | | | - Charles P Lin
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02445, USA
| | - Guo-Fu Hu
- Graduate Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA 02111, USA; Molecular Oncology Research Institute, Tufts Medical Center, Boston, MA 02111, USA.
| | - David T Scadden
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02445, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA.
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128
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Adhesion GPCRs in immunology. Biochem Pharmacol 2016; 114:88-102. [DOI: 10.1016/j.bcp.2016.04.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 04/25/2016] [Indexed: 12/16/2022]
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129
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Zewdu R, Risolino M, Barbulescu A, Ramalingam P, Butler JM, Selleri L. Spleen hypoplasia leads to abnormal stress hematopoiesis in mice with loss of Pbx homeoproteins in splenic mesenchyme. J Anat 2016; 229:153-69. [PMID: 27075259 PMCID: PMC5341595 DOI: 10.1111/joa.12479] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2016] [Indexed: 01/01/2023] Open
Abstract
The spleen plays critical roles in immunity and also provides a permissive microenvironment for hematopoiesis. Previous studies have reported that the TALE-class homeodomain transcription factor Pbx1 is essential in hematopoietic stem and progenitor cells (HSPCs) for stem cell maintenance and progenitor expansion. However, the role of Pbx1 in the hematopoietic niche has not been investigated. Here we explored the effects that genetic perturbation of the splenic mesenchymal niche has on hematopoiesis upon loss of members of the Pbx family of homeoproteins. Splenic mesenchyme-specific inactivation of Pbx1 (SKO) on a Pbx2- or Pbx3-deficient genetic background (DKO) resulted in abnormal development of the spleen, which is dysmorphic and severely hypoplastic. This phenotype, in turn, affected the number of HSPCs in the fetal and adult spleen at steady state, as well as markedly impairing the kinetics of hematopoietic regeneration in adult mice after sub-lethal and lethal myelosuppressive irradiation. Spleens of mice with compound Pyx deficiency 8 days following sublethal irradiation displayed significant downregulation of multiple cytokine-encoding genes, including KitL/SCF, Cxcl12/SDF-1, IL-3, IL-4, GM-CSF/Csf2 IL-10, and Igf-1, compared with controls. KitL/SCF and Cxcl12/SDF-1 were recently shown to play key roles in the splenic niche in response to various haematopoietic stresses such as myeloablation, blood loss, or pregnancy. Our results demonstrate that, in addition to their intrinsic roles in HSPCs, non-cell autonomous functions of Pbx factors within the splenic niche contribute to the regulation of hematopoiesis, at least in part via the control of KitL/SCF and Cxcl12/SDF-1. Furthermore, our study establishes that abnormal spleen development and hypoplasia have deleterious effects on the efficiency of hematopoietic recovery after bone marrow injury.
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Affiliation(s)
- Rediet Zewdu
- Department of Cell and Developmental BiologyWeill Cornell MedicineNew YorkNYUSA
- Present address: Huntsman Cancer Institute University of UtahSalt Lake CityUTUSA
| | - Maurizio Risolino
- Department of Cell and Developmental BiologyWeill Cornell MedicineNew YorkNYUSA
- Program in Craniofacial BiologyDepartment of Orofacial Sciences & Department of AnatomyUniversity of California San FranciscoSan FranciscoCAUSA
| | | | | | - Jason M. Butler
- Department of Genetic MedicineWeill Cornell MedicineNew YorkNYUSA
| | - Licia Selleri
- Department of Cell and Developmental BiologyWeill Cornell MedicineNew YorkNYUSA
- Program in Craniofacial BiologyDepartment of Orofacial Sciences & Department of AnatomyUniversity of California San FranciscoSan FranciscoCAUSA
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130
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Ratanasirintrawoot S, Israsena N. Stem Cells in the Intestine: Possible Roles in Pathogenesis of Irritable Bowel Syndrome. J Neurogastroenterol Motil 2016; 22:367-82. [PMID: 27184041 PMCID: PMC4930294 DOI: 10.5056/jnm16023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/08/2016] [Indexed: 12/13/2022] Open
Abstract
Irritable bowel syndrome is one of the most common functional gastrointestinal (GI) disorders that significantly impair quality of life in patients. Current available treatments are still not effective and the pathophysiology of this condition remains unclearly defined. Recently, research on intestinal stem cells has greatly advanced our understanding of various GI disorders. Alterations in conserved stem cell regulatory pathways such as Notch, Wnt, and bone morphogenic protein/TGF-β have been well documented in diseases such as inflammatory bowel diseases and cancer. Interaction between intestinal stem cells and various signals from their environment is important for the control of stem cell self-renewal, regulation of number and function of specific intestinal cell types, and maintenance of the mucosal barrier. Besides their roles in stem cell regulation, these signals are also known to have potent effects on immune cells, enteric nervous system and secretory cells in the gut, and may be responsible for various aspects of pathogenesis of functional GI disorders, including visceral hypersensitivity, altered gut motility and low grade gut inflammation. In this article, we briefly summarize the components of these signaling pathways, how they can be modified by extrinsic factors and novel treatments, and provide evidenced support of their roles in the inflammation processes. Furthermore, we propose how changes in these signals may contribute to the symptom development and pathogenesis of irritable bowel syndrome.
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Affiliation(s)
- Sutheera Ratanasirintrawoot
- Stem Cell and Cell Therapy Research Unit, Chulalongkorn University, Bangkok, Thailand.,Department of Research Affairs, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Nipan Israsena
- Stem Cell and Cell Therapy Research Unit, Chulalongkorn University, Bangkok, Thailand.,Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
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131
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Ouspenskaia T, Matos I, Mertz AF, Fiore VF, Fuchs E. WNT-SHH Antagonism Specifies and Expands Stem Cells prior to Niche Formation. Cell 2016; 164:156-169. [PMID: 26771489 DOI: 10.1016/j.cell.2015.11.058] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 10/15/2015] [Accepted: 11/18/2015] [Indexed: 12/15/2022]
Abstract
Adult stem cell (SC) maintenance and differentiation are known to depend on signals received from the niche. Here, however, we demonstrate a mechanism for SC specification and regulation that is niche independent. Using immunofluorescence, live imaging, genetics, cell-cycle analyses, in utero lentiviral transduction, and lineage-tracing, we show that in developing hair buds, SCs are born from asymmetric divisions that differentially display WNT and SHH signaling. Displaced WNT(lo) suprabasal daughters become SCs that respond to paracrine SHH and symmetrically expand. By contrast, basal daughters remain WNT(hi). They express but do not respond to SHH and hence maintain slow-cycling, asymmetric divisions. Over time, they become short-lived progenitors, generating differentiating daughters rather than SCs. Thus, in contrast to an established niche that harbors a fixed SC pool whose expelled progeny differentiate, asymmetric divisions first specify and displace early SCs into an environment conducive to expansion and later restrict their numbers by switching asymmetric fates.
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Affiliation(s)
- Tamara Ouspenskaia
- Robin Neustein Laboratory of Mammalian Development and Cell Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10065, USA
| | - Irina Matos
- Robin Neustein Laboratory of Mammalian Development and Cell Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10065, USA
| | - Aaron F Mertz
- Robin Neustein Laboratory of Mammalian Development and Cell Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10065, USA
| | - Vincent F Fiore
- Robin Neustein Laboratory of Mammalian Development and Cell Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10065, USA
| | - Elaine Fuchs
- Robin Neustein Laboratory of Mammalian Development and Cell Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10065, USA.
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132
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Distinct bone marrow blood vessels differentially regulate haematopoiesis. Nature 2016; 532:323-8. [PMID: 27074509 PMCID: PMC6450701 DOI: 10.1038/nature17624] [Citation(s) in RCA: 481] [Impact Index Per Article: 60.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 02/25/2016] [Indexed: 12/15/2022]
Abstract
Bone marrow (BM) endothelial cells (BMECs) form a network of blood vessels (BVs) which regulate both leukocyte trafficking and hematopoietic stem and progenitor cell (HSPC) maintenance. However, it is not clear how BMECs balance these dual roles and if these events occur at the same vascular site. We found that BM stem cell maintenance and leukocyte trafficking are regulated by distinct BV types with different permeability properties. Less permeable arterial BVs maintain HSCs in a low reactive oxygen species (ROS) state, whereas the more permeable sinusoids promote HSPC activation and are the exclusive site for immature and mature leukocyte trafficking to and from the BM. A functional consequence of high BVs permeability is that exposure to blood plasma increases BM HSPC ROS levels, augmenting their migration capacity while compromising their long term repopulation and survival potential. These findings may have relevance for clinical hematopoietic stem cell transplantation and mobilization protocols.
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133
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Westphalen CB, Takemoto Y, Tanaka T, Macchini M, Jiang Z, Renz BW, Chen X, Ormanns S, Nagar K, Tailor Y, May R, Cho Y, Asfaha S, Worthley DL, Hayakawa Y, Urbanska AM, Quante M, Reichert M, Broyde J, Subramaniam PS, Remotti H, Su GH, Rustgi AK, Friedman RA, Honig B, Califano A, Houchen CW, Olive KP, Wang TC. Dclk1 Defines Quiescent Pancreatic Progenitors that Promote Injury-Induced Regeneration and Tumorigenesis. Cell Stem Cell 2016; 18:441-55. [PMID: 27058937 PMCID: PMC4826481 DOI: 10.1016/j.stem.2016.03.016] [Citation(s) in RCA: 161] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 12/08/2015] [Accepted: 03/24/2016] [Indexed: 12/19/2022]
Abstract
The existence of adult pancreatic progenitor cells has been debated. While some favor the concept of facultative progenitors involved in homeostasis and repair, neither a location nor markers for such cells have been defined. Using genetic lineage tracing, we show that Doublecortin-like kinase-1 (Dclk1) labels a rare population of long-lived, quiescent pancreatic cells. In vitro, Dclk1+ cells proliferate readily and sustain pancreatic organoid growth. In vivo, Dclk1+ cells are necessary for pancreatic regeneration following injury and chronic inflammation. Accordingly, their loss has detrimental effects after cerulein-induced pancreatitis. Expression of mutant Kras in Dclk1+ cells does not affect their quiescence or longevity. However, experimental pancreatitis converts Kras mutant Dclk1+ cells into potent cancer-initiating cells. As a potential effector of Kras, Dclk1 contributes functionally to the pathogenesis of pancreatic cancer. Taken together, these observations indicate that Dclk1 marks quiescent pancreatic progenitors that are candidates for the origin of pancreatic cancer.
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Affiliation(s)
- C Benedikt Westphalen
- Department of Internal Medicine III, Hospital of the University of Munich D-81377, Munich, Germany; Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Yoshihiro Takemoto
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Takayuki Tanaka
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Marina Macchini
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA; Department of Experimental, Diagnostic and Specialty Medicine, Bologna University, 40128 Bologna, Italy
| | - Zhengyu Jiang
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Bernhard W Renz
- Department of General, Visceral, Transplantation, Vascular and Thoracic Surgery, Hospital of the University of Munich D-81377, Munich, Germany; Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Xiaowei Chen
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Steffen Ormanns
- Department of Pathology, Hospital of the University of Munich D-81377, Munich, Germany
| | - Karan Nagar
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Yagnesh Tailor
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Randal May
- Department of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, OK 73104, USA
| | - Youngjin Cho
- Department of Pharmacology, Columbia University Medical Center, New York, NY 10032, USA
| | - Samuel Asfaha
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Daniel L Worthley
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Yoku Hayakawa
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Aleksandra M Urbanska
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA
| | - Michael Quante
- Department of Internal Medicine II, Klinikum rechts der Isar II, Technische Universität München, D-81675 Munich, Germany
| | - Maximilian Reichert
- Department of Internal Medicine II, Klinikum rechts der Isar II, Technische Universität München, D-81675 Munich, Germany; Division of Gastroenterology, Department of Medicine, Abramson Cancer Center, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Joshua Broyde
- Department of Systems Biology, Columbia University Medical Center, New York, NY 10032, USA
| | - Prem S Subramaniam
- Department of Systems Biology, Columbia University Medical Center, New York, NY 10032, USA
| | - Helen Remotti
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA
| | - Gloria H Su
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA; Department of Otolaryngology / Head & Neck Surgery, Columbia University Medical Center, New York, NY 10032, USA
| | - Anil K Rustgi
- Division of Gastroenterology, Department of Medicine, Abramson Cancer Center, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Richard A Friedman
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Medical Center, New York, NY 10032, USA
| | - Barry Honig
- Department of Pharmacology, Columbia University Medical Center, New York, NY 10032, USA
| | - Andrea Califano
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA; Department of Otolaryngology / Head & Neck Surgery, Columbia University Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Medical Center, New York, NY 10032, USA; Department of Biochemistry and Molecular Biophysics, Columbia University Medical Center, New York, NY 10032, USA; Institute for Cancer Genetics, Columbia University, New York, NY 10032, USA; Center for Computational Biology and Bioinformatics (C2B2), Columbia University, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Courtney W Houchen
- Department of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, OK 73104, USA
| | - Kenneth P Olive
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA; Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA
| | - Timothy C Wang
- Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032, USA.
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134
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Sugimura R. Bioengineering Hematopoietic Stem Cell Niche toward Regenerative Medicine. Adv Drug Deliv Rev 2016; 99:212-220. [PMID: 26527127 DOI: 10.1016/j.addr.2015.10.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/20/2015] [Accepted: 10/15/2015] [Indexed: 12/20/2022]
Abstract
The scope of this chapter is to introduce the current consensus of hematopoietic stem cell (HSC) niche biology to bioengineering field so that can apply to regenerative medicine. A decade of research has been addressing "what is HSC niche", then next step is "how it advances medicine". The demand to improve HSC transplantation has advanced the methodology to expand HSC in vitro. Still precise modeling of bone marrow (BM) is demanded by bioengineering HSC niche in vitro. Better understanding of HSC niche is essential toward this progress. Now it would be the time to apply the knowledge of HSC niche field to the venue of bioengineering, so that a promising new approach to regenerative medicine might appear. This chapter describes the current consensus of niche that endothelial cell and perivascular mesenchymal stromal cell maintain HSC, expansion of cord blood HSC by small molecules, bioengineering efforts to model HSC niche by microfluidics chip, organoids, and breakthroughs to induce HSC from heterologous types of cells.
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135
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Tumor microenvironment for cancer stem cells. Adv Drug Deliv Rev 2016; 99:197-205. [PMID: 26362921 DOI: 10.1016/j.addr.2015.08.005] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/01/2015] [Accepted: 08/26/2015] [Indexed: 02/08/2023]
Abstract
Tumor tissues consist of heterogeneous cancer cells including cancer stem cells (CSCs) that can terminally differentiate into cancer cells. Tissue-specific stem cells in normal organs maintain their stemness in a specific microenvironment, the stem cell niche; several studies have suggested that there are specific microenvironments that maintain CSCs in an immature phenotype. Cell types in a CSC niche vary from fibroblasts, to endothelial cells, immune cells, and so on; these non-cancer cells have been suggested to change their original features in the normal tissue/organ and to acquire a phenotype that protects CSCs from anticancer therapies. Therefore, to kill CSCs, we need to understand the cellular and molecular mechanisms involved in the maintenance of the immature phenotype of CSCs and in drug resistance.
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136
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Sato M, Tamura M. Noncanonical Wnt signaling in stromal cells regulates B-lymphogenesis through interleukin-7 expression. Biochem Biophys Rep 2016; 6:179-184. [PMID: 28955876 PMCID: PMC5600363 DOI: 10.1016/j.bbrep.2016.03.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Revised: 03/28/2016] [Accepted: 03/31/2016] [Indexed: 12/16/2022] Open
Abstract
The regulation of early B cell development and the interaction of hematopoietic precursors with stromal cells in the bone marrow (BM) are controlled by various secreted signaling molecules. Several recent studies showed Wnt signaling involved in B-lymphogenesis through stromal cells. However, the molecules modulated by Wnt signaling in stromal cells regulating B-lymphogenesis have not been identified yet. Interleukin (IL)-7 and CXC chemokine ligand (CXCL) 12 are known to be express in stromal cells, and both molecules are essential for B-lymphogenesis. In the present study, we examined the role of Wnt signaling in regulating IL-7 and CXCL12 expression and in affecting B-lymphogenesis. In mouse stromal ST2 cells, expression of IL-7 and CXCL12 mRNA was augmented by noncanonical Wnt5a. When mouse BM-derived cells were cultured on Wnt5a-overexpressing ST2 cells, an increased number of B220+/IgM- B-lymphoid precursor cells was observed. These results show that Wnt5a regulates IL-7 gene expression in stromal cells and suggest the possibility that noncanonical Wnt regulates B-lymphogenesis via IL-7 expression in stromal cells. Noncanonical Wnt signaling enhances IL-7 gene expression in ST2 cells. ST2 cells well maintain B cells in the coculture system. Noncanonical Wnt5a overexpressed ST2 cells increase the number of B cell progenitors.
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Affiliation(s)
- Mari Sato
- Department of Biochemistry and Molecular Biology, Graduate School of Dental Medicine, Hokkaido University, N13, W7, Sapporo 060-8586, Japan
| | - Masato Tamura
- Department of Biochemistry and Molecular Biology, Graduate School of Dental Medicine, Hokkaido University, N13, W7, Sapporo 060-8586, Japan
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137
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Estus TL, Choudhary S, Pilbeam CC. Prostaglandin-mediated inhibition of PTH-stimulated β-catenin signaling in osteoblasts by bone marrow macrophages. Bone 2016; 85:123-30. [PMID: 26851123 PMCID: PMC4835216 DOI: 10.1016/j.bone.2016.01.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/29/2016] [Accepted: 01/31/2016] [Indexed: 11/29/2022]
Abstract
Bone marrow macrophages (BMMs), in the presence of cyclooxygenase-2 (Cox2) produced PGE2, secrete an inhibitory factor in response to Rankl that blocks PTH-stimulated osteoblastic differentiation. This study was to determine if the inhibitory factor also blocks PTH-stimulated Wnt signaling. Primary calvarial osteoblasts (POBs) were co-cultured with conditioned medium (CM) from Rankl-treated wild type (WT) BMMs, which make the inhibitory factor, and Cox2 knockout (KO) BMMs, which do not. PTH induced cAMP production was blocked by WT CM but not by KO CM. In the presence of KO CM, PTH induced phosphorylation at β-catenin serine sites, ser552 and ser675, previously shown to be phosphorylated by protein kinase A (PKA). Phosphorylation was blocked by WT CM and by H89, a PKA inhibitor. PTH did not increase total β-catenin. PTH-stimulated transcription factor/lymphoid enhancer-binding factor response element activity in POBs was blocked by WT CM and by serum amyloid A (SAA), the human recombinant analog of murine Saa3, which has recently been shown to be the inhibitory factor. In POBs cultured with Cox2 KO CM, PTH increased expression of multiple genes associated with the anabolic actions of PTH and decreased expression of Wnt antagonists. This differential regulation of gene expression was not seen in POBs cultured with WT CM. These data highlight the ability of PTH to phosphorylate β-catenin directly via PKA and demonstrate the ability of a Cox2-dependent inhibitory factor, secreted by Rankl-stimulated BMMs, to abrogate PTH stimulated β-catenin signaling. Our results suggest that PTH can stimulate a novel negative feedback of its anabolic actions by stimulating Rankl and Cox2 expression.
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Affiliation(s)
- Thomas L Estus
- Department of Biomedical Engineering, University of Connecticut, Storrs, 263 Farmington Ave, Farmington, CT 06030, CT, United States; New England Musculoskeletal Institute, UConn Health, 263 Farmington Ave, Farmington, CT 06030, CT, United States.
| | - Shilpa Choudhary
- New England Musculoskeletal Institute, UConn Health, 263 Farmington Ave, Farmington, CT 06030, CT, United States; Department of Medicine, UConn Health, 263 Farmington Ave, Farmington, CT 06030, CT, United States.
| | - Carol C Pilbeam
- Department of Biomedical Engineering, University of Connecticut, Storrs, 263 Farmington Ave, Farmington, CT 06030, CT, United States; New England Musculoskeletal Institute, UConn Health, 263 Farmington Ave, Farmington, CT 06030, CT, United States; Department of Medicine, UConn Health, 263 Farmington Ave, Farmington, CT 06030, CT, United States.
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138
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Wang MT, Holderfield M, Galeas J, Delrosario R, To MD, Balmain A, McCormick F. K-Ras Promotes Tumorigenicity through Suppression of Non-canonical Wnt Signaling. Cell 2016; 163:1237-1251. [PMID: 26590425 DOI: 10.1016/j.cell.2015.10.041] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/01/2015] [Accepted: 10/13/2015] [Indexed: 12/30/2022]
Abstract
K-Ras and H-Ras share identical effectors and have similar properties; however, the high degree of tumor-type specificity associated with K-Ras and H-Ras mutations suggests that they have unique roles in oncogenesis. Here, we report that oncogenic K-Ras, but not H-Ras, suppresses non-canonical Wnt/Ca(2+) signaling, an effect that contributes strongly to its tumorigenic properties. K-Ras does this by binding to calmodulin and so reducing CaMKii activity and expression of Fzd8. Restoring Fzd8 in K-Ras mutant pancreatic cells suppresses malignancy, whereas depletion of Fzd8 in H-Ras(V12)-transformed cells enhances their tumor initiating capacity. Interrupting K-Ras-calmodulin binding using genetic means or by treatment with an orally active protein kinase C (PKC)-activator, prostratin, represses tumorigenesis in K-Ras mutant pancreatic cancer cells. These findings provide an alternative way to selectively target this "undruggable" protein.
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Affiliation(s)
- Man-Tzu Wang
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA
| | - Matthew Holderfield
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA
| | - Jacqueline Galeas
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA
| | - Reyno Delrosario
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA
| | - Minh D To
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA
| | - Allan Balmain
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA
| | - Frank McCormick
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3(rd) Street, San Francisco, CA 94158, USA.
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139
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Staal FJT, Chhatta A, Mikkers H. Caught in a Wnt storm: Complexities of Wnt signaling in hematopoiesis. Exp Hematol 2016; 44:451-7. [PMID: 27016274 DOI: 10.1016/j.exphem.2016.03.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 03/11/2016] [Accepted: 03/15/2016] [Indexed: 01/10/2023]
Abstract
The Wnt signaling pathway is an evolutionary conserved pathway that is involved in the development of almost every organ system in the body and provides self-renewal signals for most, if not all, adult stem cell systems. In recent years, this pathway has been studied by various research groups working on hematopoietic stem cells, resulting in contradicting conclusions. Here, we discuss and interpret the results of these studies and propose that Wnt dosage, the source of hematopoietic stem cells, and interactions with other pathways explain these disparate results.
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Affiliation(s)
- Frank J T Staal
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands; Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands.
| | - Amiet Chhatta
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands; Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Harald Mikkers
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands; Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
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Kumawat K, Gosens R. WNT-5A: signaling and functions in health and disease. Cell Mol Life Sci 2016; 73:567-87. [PMID: 26514730 PMCID: PMC4713724 DOI: 10.1007/s00018-015-2076-y] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 10/13/2015] [Accepted: 10/15/2015] [Indexed: 12/14/2022]
Abstract
WNT-5A plays critical roles in a myriad of processes from embryonic morphogenesis to the maintenance of post-natal homeostasis. WNT-5A knock-out mice fail to survive and present extensive structural malformations. WNT-5A predominantly activates β-catenin-independent WNT signaling cascade but can also activate β-catenin signaling to relay its diverse cellular effects such as cell polarity, migration, proliferation, cell survival, and immunomodulation. Moreover, aberrant WNT-5A signaling is associated with several human pathologies such as cancer, fibrosis, and inflammation. Thus, owing to its diverse functions, WNT-5A is a crucial signaling molecule currently under intense investigation with efforts to not only delineate its signaling mechanisms and functions in physiological and pathological conditions, but also to develop strategies for its therapeutic targeting.
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Affiliation(s)
- Kuldeep Kumawat
- Department of Molecular Pharmacology, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
- Groningen Research Institute for Asthma and COPD, University of Groningen, Groningen, The Netherlands.
| | - Reinoud Gosens
- Department of Molecular Pharmacology, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
- Groningen Research Institute for Asthma and COPD, University of Groningen, Groningen, The Netherlands
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141
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Abstract
Mesenchymal stromal cells (MSCs) are heterogeneous and primitive cells discovered first in the bone marrow (BM). They have putative roles in maintaining tissue homeostasis and are increasingly recognized as components of stem cell niches, which are best defined in the blood. The absence of in vivo MSC markers has limited our ability to track their behavior in vivo and draw comparisons with in vitro observations. Here we review the historical background of BM-MSCs, advances made in their prospective isolation, their developmental origin and contribution to maintaining subsets of hematopoietic cells, and how mesenchymal cells contribute to other stem cell niches.
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Affiliation(s)
- Youmna Kfoury
- Center for Regenerative Medicine and MGH Cancer Center, Massachusetts General Hospital, Department of Stem Cell and Regenerative Biology and Harvard Stem Cell Institute, Harvard University, Boston, MA 02114, USA
| | - David T Scadden
- Center for Regenerative Medicine and MGH Cancer Center, Massachusetts General Hospital, Department of Stem Cell and Regenerative Biology and Harvard Stem Cell Institute, Harvard University, Boston, MA 02114, USA.
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142
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Famili F, Naber BAE, Vloemans S, de Haas EFE, Tiemessen MM, Staal FJT. Discrete roles of canonical and non-canonical Wnt signaling in hematopoiesis and lymphopoiesis. Cell Death Dis 2015; 6:e1981. [PMID: 26583322 PMCID: PMC4670932 DOI: 10.1038/cddis.2015.326] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/30/2015] [Accepted: 10/09/2015] [Indexed: 12/17/2022]
Abstract
The mechanisms that regulate proliferation, fate decisions and differentiation of hematopoietic stem cells (HSC) and thymic stem cells are highly complex. Several signaling pathways including Wnt signaling have important roles during these processes. Both canonical and non-canonical Wnt signaling are important in normal and malignant hematopoiesis and lymphoid development, yet their precise roles are controversial. In a side-by-side comparison, we investigated the roles of the canonical and non-canonical Wnt pathway in hematopoiesis and thymopoiesis. As complete loss-of-function models for non-canonical Wnt signaling are not yet available and highly complex for canonical Wnt signaling, we decided to use a gain-of-function approach. To this end, Wnt3a and Wn5a, two well-known prototypical canonical and non-canonical Wnt ligands were produced in hematopoiesis supporting stromal assays. High levels of Wnt3a signaling blocked T-cell development at early stages, whereas intermediate levels accelerated T-cell development. In contrast, Wnt5a signaling prompted apoptosis in developing thymocytes, without affecting differentiation at a particular stage. To explore the role of Wnt3a and Wnt5a in vivo, we transduced HSCs isolated from fetal liver, transduced with Wnt3a and Wnt5a vectors, and performed reconstitution assays in irradiated C57Bl/6 mice. Wnt3a overexpression led to increased lymphopoiesis, whereas Wnt5a augments myelopoiesis in the bone marrow (BM) and spleen. Thus, the canonical and non-canonical Wnt signaling have discrete roles in hematopoiesis and thymopoiesis, and understanding their right dose of action is crucial for prospective translational applications.
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Affiliation(s)
- F Famili
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, The Netherlands
| | - B A E Naber
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, The Netherlands
| | - S Vloemans
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, The Netherlands
| | - E F E de Haas
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, The Netherlands
| | - M M Tiemessen
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, The Netherlands
| | - F J T Staal
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, The Netherlands
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143
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Regulation of hematopoietic stem cells in the niche. SCIENCE CHINA-LIFE SCIENCES 2015; 58:1209-15. [DOI: 10.1007/s11427-015-4960-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Accepted: 09/17/2015] [Indexed: 12/31/2022]
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Abstract
BACKGROUND Primary colonic epithelial defects leading to inflammatory responses are considered central to the development of ulcerative colitis (UC). However, a systematic analysis of various colonic subcompartments in the pathogenesis of UC before inflammation remains elusive. Here, we explored changes in colonic subcompartments and their associated niche signals in patient mucosal biopsies and in an animal model of colitis. METHODS Analysis of mucosal biopsies obtained from uninvolved and involved regions of patients with UC and Crohn's disease was performed and compared with normal subjects. Temporal analysis of colonic subcompartments was performed in mice administered with 5% dextran sodium sulphate. Phenotypic enumeration of the crypt subcompartment was complemented with flow cytometric analysis. Members of Notch and Wnt signaling pathways were analyzed by molecular, biochemical, and colocalization studies. RESULTS Phenotypic enumeration of colonocytes' subcompartments from patients revealed significant alterations of the lower crypt, enriched in stem cell and progenitors, independent of inflammation. These changes, unique to UC, were confirmed by immunohistochemistry and molecular analysis. In parallel, a defect in proliferation and Muc2 synthesis was observed. Animal data before inflammation recapitulated human studies. Mechanistic studies revealed that changes in signaling through Wnt primarily affected colonic stem cells, whereas Notch affected progenitor function. CONCLUSIONS Our results thus provide new insights into the development of inflammation and relapse in UC and suggest that the stem cell niche in the colon may influence pathogenesis of the disease.
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145
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Hypoxia regulates the hematopoietic stem cell niche. Pflugers Arch 2015; 468:13-22. [PMID: 26490456 DOI: 10.1007/s00424-015-1743-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 09/30/2015] [Accepted: 10/02/2015] [Indexed: 12/17/2022]
Abstract
Bone marrow, the site of hematopoiesis throughout adulthood, is a physiologically hypoxic organ. Thus, various biological oxygen sensors and their signaling cascades play a pivotal role in hematopoietic systems in the bone marrow under both physiologic and pathologic conditions. Hypoxia-inducible factors (HIFs) are hypoxic stress sensor proteins that are stabilized under homeostatic or stress-induced hypoxia. In the hypoxic bone marrow, HIFs play crucial roles in hematopoietic stem cells (HSCs) and in the cells of the HSC niche. The signals downstream of the HIFs maintain HSC quiescence, survival, and metabolic homeostasis through both cell-autonomous and non-cell-autonomous mechanisms. Leukemic stem cells (LSCs) hijack these delicate hypoxia-sensing mechanisms to sustain their self-renewal potential, promoting disease progression and drug resistance even under normoxic conditions. This review focuses on HIF-mediated oxygen-sensing mechanisms of adult HSCs and LSCs and their niche cells in the hypoxic bone marrow.
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146
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Asada N, Sato M, Katayama Y. Communication of bone cells with hematopoiesis, immunity and energy metabolism. BONEKEY REPORTS 2015; 4:748. [PMID: 26512322 DOI: 10.1038/bonekey.2015.117] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 08/28/2015] [Indexed: 12/20/2022]
Abstract
The bone contains the bone marrow. The functional communication between bone cells and hematopoiesis has been extensively studied in the past decade or so. Osteolineage cells and their modulators, such as the sympathetic nervous system, macrophages and osteoclasts, form a complex unit to maintain the homeostasis of hematopoiesis, called the 'microenvironment'. Recently, bone-embedded osteocytes, the sensors of gravity and mechanical stress, have joined the microenvironment, and they are demonstrated to contribute to whole body homeostasis through the control of immunity and energy metabolism. The inter-organ communication orchestrated by the bone is summarized in this article.
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Affiliation(s)
- Noboru Asada
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine , Kobe, Japan
| | - Mari Sato
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine , Kobe, Japan
| | - Yoshio Katayama
- Division of Hematology, Department of Medicine, Kobe University Graduate School of Medicine , Kobe, Japan ; Department of Hematology, Kobe University Hospital , Kobe, Japan ; PRESTO, Japan Science and Technology Agency , Kawaguchi, Japan
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Adi N, Perriotte-Olson C, Desouza C, Ramalingam R, Saraswathi V. Hematopoietic cyclooxygenase-2 deficiency increases adipose tissue inflammation and adiposity in obesity. Obesity (Silver Spring) 2015; 23:2037-45. [PMID: 26316178 PMCID: PMC6368065 DOI: 10.1002/oby.21184] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 05/18/2015] [Accepted: 05/20/2015] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Adipose tissue (AT) macrophages mediate AT inflammation in obesity, and cyclooxygenase-2 (COX-2) is a major inflammatory gene. It was hypothesized that deletion of hematopoietic COX-2 will inhibit AT inflammation in obesity. METHODS Lethally irradiated wild-type (WT) mice were injected with bone marrow (BM) cells collected from WT or COX-2 knock-out (COX-2-/-) donor mice and fed a high-fat diet for 16 weeks. RESULTS The mice that received BM cells from COX-2-/- mice (BM-COX-2-/-) gained increased body weight, fat mass, and visceral AT (VAT) mass. These mice exhibited reduced inflammatory markers in the VAT stromal vascular cells (SVC). However, the inflammatory markers were increased in adipocyte fraction and/or whole VAT. The activation of ERK1/2 MAPK, a pro-inflammatory signaling pathway, was increased in BM-COX-2-/- mice. The molecular markers of adipogenesis were increased in the VAT or adipocyte fraction. Wnt signaling markers which inhibit adipogenesis, including Wnt3A and DVL3, were reduced, and Wnt5a/b which promotes inflammation was increased in the VAT and/or adipocytes. Finally, an increase in hepatic triglyceride levels in BM-COX-2-/- mice was noted. CONCLUSIONS The data suggest that COX-2 deletion in hematopoietic cells reduces SVC inflammation but increases VAT inflammation and promotes adiposity likely via altered Wnt signaling.
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Affiliation(s)
- Nikhil Adi
- Department of Internal Medicine/Division of Diabetes, Endocrinology, and Metabolism, University of Nebraska Medical Center
- VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Curtis Perriotte-Olson
- Department of Internal Medicine/Division of Diabetes, Endocrinology, and Metabolism, University of Nebraska Medical Center
- VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Cyrus Desouza
- Department of Internal Medicine/Division of Diabetes, Endocrinology, and Metabolism, University of Nebraska Medical Center
- VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Ramesh Ramalingam
- Department of Internal Medicine/Division of Diabetes, Endocrinology, and Metabolism, University of Nebraska Medical Center
- VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Viswanathan Saraswathi
- Department of Internal Medicine/Division of Diabetes, Endocrinology, and Metabolism, University of Nebraska Medical Center
- VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, Tennessee
- Address correspondence to: Viswanathan Saraswathi, Research Services, VA Nebraska Western Iowa Health Care System, Omaha, NE. Ph: 402-995-3033; Fax: 402-449-0604;
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149
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Huang K, Du J, Ma N, Liu J, Wu P, Dong X, Meng M, Wang W, Chen X, Shi X, Chen Q, Yang Z, Chen S, Zhang J, Li Y, Li W, Zheng Y, Cai J, Li P, Sun X, Wang J, Pei D, Pan G. GATA2(-/-) human ESCs undergo attenuated endothelial to hematopoietic transition and thereafter granulocyte commitment. CELL REGENERATION 2015; 4:4. [PMID: 26246892 PMCID: PMC4526303 DOI: 10.1186/s13619-015-0018-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 07/08/2015] [Indexed: 01/17/2023]
Abstract
Background Hematopoiesis is a progressive process collectively controlled by an elaborate network of transcription factors (TFs). Among these TFs, GATA2 has been implicated to be critical for regulating multiple steps of hematopoiesis in mouse models. However, whether similar function of GATA2 is conserved in human hematopoiesis, especially during early embryonic development stage, is largely unknown. Results To examine the role of GATA2 in human background, we generated homozygous GATA2 knockout human embryonic stem cells (GATA2−/− hESCs) and analyzed their blood differentiation potential. Our results demonstrated that GATA2−/− hESCs displayed attenuated generation of CD34+CD43+ hematopoietic progenitor cells (HPCs), due to the impairment of endothelial to hematopoietic transition (EHT). Interestingly, GATA2−/− hESCs retained the potential to generate erythroblasts and macrophages, but never granulocytes. We further identified that SPI1 downregulation was partially responsible for the defects of GATA2−/− hESCs in generation of CD34+CD43+ HPCs and granulocytes. Furthermore, we found that GATA2−/− hESCs restored the granulocyte potential in the presence of Notch signaling. Conclusion Our findings revealed the essential roles of GATA2 in EHT and granulocyte development through regulating SPI1, and uncovered a role of Notch signaling in granulocyte generation during hematopoiesis modeled by human ESCs. Electronic supplementary material The online version of this article (doi:10.1186/s13619-015-0018-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ke Huang
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Juan Du
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Ning Ma
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Jiajun Liu
- Department of Hematology, Sun Yat-sen University, Guangzhou, 510630 China
| | - Pengfei Wu
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Xiaoya Dong
- Department of Hematology, Sun Yat-sen University, Guangzhou, 510630 China
| | - Minghui Meng
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Wenqian Wang
- Department of Hematology, Sun Yat-sen University, Guangzhou, 510630 China
| | - Xin Chen
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Xi Shi
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Qianyu Chen
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Zhongzhou Yang
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Shubin Chen
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Jian Zhang
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Yuhang Li
- South China University of Technology, Guangzhou, 510641 China
| | - Wei Li
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Yi Zheng
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Jinglei Cai
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Peng Li
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Xiaofang Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China ; Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, Guangzhou, China
| | - Jinyong Wang
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Duanqing Pei
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
| | - Guangjin Pan
- CAS Key Laboratory of Regenerative Biology, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China ; Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530 China
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González-Nieto D, Chang KH, Fasciani I, Nayak R, Fernandez-García L, Barrio LC, Cancelas JA. Connexins: Intercellular Signal Transmitters in Lymphohematopoietic Tissues. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 318:27-62. [PMID: 26315883 DOI: 10.1016/bs.ircmb.2015.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Life-long hematopoietic demands are met by a pool of hematopoietic stem cells (HSC) with self-renewal and multipotential differentiation ability. Humoral and paracrine signals from the bone marrow (BM) hematopoietic microenvironment control HSC activity. Cell-to-cell communication through connexin (Cx) containing gap junctions (GJs) allows pluricellular coordination and synchronization through transfer of small molecules with messenger activity. Hematopoietic and surrounding nonhematopoietic cells communicate each other through GJs, which regulate fetal and postnatal HSC content and function in hematopoietic tissues. Traffic of HSC between peripheral blood and BM is also dependent on Cx proteins. Cx mutations are associated with human disease and hematopoietic dysfunction and Cx signaling may represent a target for therapeutic intervention. In this review, we illustrate and highlight the importance of Cxs in the regulation of hematopoietic homeostasis under normal and pathological conditions.
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Affiliation(s)
- Daniel González-Nieto
- Unit of Cellular and Animal Models, Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Kyung-Hee Chang
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA; Hoxworth Blood Center, University of Cincinnati, Cincinnati, OH, USA
| | - Ilaria Fasciani
- Unit of Experimental Neurology, Hospital Ramon y Cajal, Madrid, Spain
| | - Ramesh Nayak
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Laura Fernandez-García
- Unit of Cellular and Animal Models, Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain
| | - Luis C Barrio
- Unit of Experimental Neurology, Hospital Ramon y Cajal, Madrid, Spain
| | - José A Cancelas
- Division of Experimental Hematology and Cancer Biology, Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA; Hoxworth Blood Center, University of Cincinnati, Cincinnati, OH, USA
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