1
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Zhu AZ, Ma Z, Wolff EV, Lin Z, Gao ZJ, Li X, Du W. HES1 is required for mouse fetal hematopoiesis. Stem Cell Res Ther 2024; 15:235. [PMID: 39075526 PMCID: PMC11287931 DOI: 10.1186/s13287-024-03836-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 07/06/2024] [Indexed: 07/31/2024] Open
Abstract
BACKGROUND Hematopoiesis in mammal is a complex and highly regulated process in which hematopoietic stem cells (HSCs) give rise to all types of differentiated blood cells. Previous studies have shown that hairy and enhancer of split (HES) repressors are essential regulators of adult HSC development downstream of Notch signaling. METHODS In this study, we investigated the role of HES1, a member of HES family, in fetal hematopoiesis using an embryonic hematopoietic specific Hes1 conditional knockout mouse model by using phenotypic flow cytometry, histopathology analysis, and functional in vitro colony forming unit (CFU) assay and in vivo bone marrow transplant (BMT) assay. RESULTS We found that loss of Hes1 in early embryonic stage leads to smaller embryos and fetal livers, decreases hematopoietic stem progenitor cell (HSPC) pool, results in defective multi-lineage differentiation. Functionally, fetal hematopoietic cells deficient for Hes1 exhibit reduced in vitro progenitor activity and compromised in vivo repopulation capacity in the transplanted recipients. Further analysis shows that fetal hematopoiesis defects in Hes1fl/flFlt3Cre embryos are resulted from decreased proliferation and elevated apoptosis, associated with de-repressed HES1 targets, p27 and PTEN in Hes1-KO fetal HSPCs. Finally, pharmacological inhibition of p27 or PTEN improves fetal HSPCs function both in vitro and in vivo. CONCLUSION Together, our findings reveal a previously unappreciated role for HES1 in regulating fetal hematopoiesis, and provide new insight into the differences between fetal and adult HSC maintenance.
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Affiliation(s)
- Anthony Z Zhu
- Division of Hematology and Oncology, University of Pittsburgh School of Medicine, 5117 Center Ave, Pittsburgh, PA, 15213, USA
- UPMC Hillman Cancer Center, Pittsburgh, PA, 15213, USA
| | - Zhilin Ma
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA
| | - Emily V Wolff
- Division of Hematology and Oncology, University of Pittsburgh School of Medicine, 5117 Center Ave, Pittsburgh, PA, 15213, USA
- UPMC Hillman Cancer Center, Pittsburgh, PA, 15213, USA
| | - Zichen Lin
- Master of Science in Medical Science, Boston University School of Medicine Graduate Master Program, Boston, MA, USA
| | - Zhenxia J Gao
- Division of Hematology and Oncology, University of Pittsburgh School of Medicine, 5117 Center Ave, Pittsburgh, PA, 15213, USA
- UPMC Hillman Cancer Center, Pittsburgh, PA, 15213, USA
| | - Xue Li
- Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, China
| | - Wei Du
- Division of Hematology and Oncology, University of Pittsburgh School of Medicine, 5117 Center Ave, Pittsburgh, PA, 15213, USA.
- UPMC Hillman Cancer Center, Pittsburgh, PA, 15213, USA.
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2
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Gray-Gaillard SL, Solis SM, Chen HM, Monteiro C, Ciabattoni G, Samanovic MI, Cornelius AR, Williams T, Geesey E, Rodriguez M, Ortigoza MB, Ivanova EN, Koralov SB, Mulligan MJ, Herati RS. SARS-CoV-2 inflammation durably imprints memory CD4 T cells. Sci Immunol 2024; 9:eadj8526. [PMID: 38905326 DOI: 10.1126/sciimmunol.adj8526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 05/30/2024] [Indexed: 06/23/2024]
Abstract
Memory CD4 T cells are critical to human immunity, yet it is unclear whether viral inflammation during memory formation has long-term consequences. Here, we compared transcriptional and epigenetic landscapes of Spike (S)-specific memory CD4 T cells in 24 individuals whose first exposure to S was via SARS-CoV-2 infection or mRNA vaccination. Nearly 2 years after memory formation, S-specific CD4 T cells established by infection remained enriched for transcripts related to cytotoxicity and for interferon-stimulated genes, likely because of a chromatin accessibility landscape altered by inflammation. Moreover, S-specific CD4 T cells primed by infection had reduced proliferative capacity in vitro relative to vaccine-primed cells. Furthermore, the transcriptional state of S-specific memory CD4 T cells was minimally altered by booster immunization and/or breakthrough infection. Thus, infection-associated inflammation durably imprints CD4 T cell memory, which affects the function of these cells and may have consequences for long-term immunity.
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Affiliation(s)
- Sophie L Gray-Gaillard
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Sabrina M Solis
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Han M Chen
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Clarice Monteiro
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Grace Ciabattoni
- Department of Microbiology, New York University School of Medicine, New York, NY, USA
| | - Marie I Samanovic
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Amber R Cornelius
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Tijaana Williams
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Emilie Geesey
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Miguel Rodriguez
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Mila Brum Ortigoza
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Ellie N Ivanova
- Department of Pathology, New York University School of Medicine, New York, NY, USA
| | - Sergei B Koralov
- Department of Pathology, New York University School of Medicine, New York, NY, USA
| | - Mark J Mulligan
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
- Department of Microbiology, New York University School of Medicine, New York, NY, USA
| | - Ramin Sedaghat Herati
- Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
- Department of Microbiology, New York University School of Medicine, New York, NY, USA
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3
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Zhao Y, Guo R, Cao X, Zhang Y, Sun R, Lu W, Zhao M. Role of chemokines in T-cell acute lymphoblastic Leukemia: From pathogenesis to therapeutic options. Int Immunopharmacol 2023; 121:110396. [PMID: 37295031 DOI: 10.1016/j.intimp.2023.110396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/11/2023]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is a highly heterogeneous and aggressive subtype of hematologic malignancy, with limited therapeutic options due to the complexity of its pathogenesis. Although high-dose chemotherapy and allogeneic hematopoietic stem cell transplantation have improved outcomes for T-ALL patients, there remains an urgent need for novel treatments in cases of refractory or relapsed disease. Recent research has demonstrated the potential of targeted therapies aimed at specific molecular pathways to improve patient outcomes. Chemokine-related signals, both upstream and downstream, modulate the composition of distinct tumor microenvironments, thereby regulating a multitude of intricate cellular processes such as proliferation, migration, invasion and homing. Furthermore, the progress in research has made significant contributions to precision medicine by targeting chemokine-related pathways. This review article summarizes the crucial roles of chemokines and their receptors in T-ALL pathogenesis. Moreover, it explores the advantages and disadvantages of current and potential therapeutic options that target chemokine axes, including small molecule antagonists, monoclonal antibodies, and chimeric antigen receptor T-cells.
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Affiliation(s)
- YiFan Zhao
- First Center Clinic College of Tianjin Medical University, Tianjin 300192, China
| | - RuiTing Guo
- First Center Clinic College of Tianjin Medical University, Tianjin 300192, China
| | - XinPing Cao
- First Center Clinic College of Tianjin Medical University, Tianjin 300192, China
| | - Yi Zhang
- First Center Clinic College of Tianjin Medical University, Tianjin 300192, China
| | - Rui Sun
- School of Medicine, Nankai University, Tianjin 300192, China
| | - WenYi Lu
- Department of Hematology, Tianjin First Central Hospital, Tianjin 300192, China
| | - MingFeng Zhao
- Department of Hematology, Tianjin First Central Hospital, Tianjin 300192, China.
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4
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Gray-Gaillard SL, Solis S, Chen HM, Monteiro C, Ciabattoni G, Samanovic MI, Cornelius AR, Williams T, Geesey E, Rodriguez M, Ortigoza MB, Ivanova EN, Koralov SB, Mulligan MJ, Herati RS. Inflammation durably imprints memory CD4+ T cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2022.11.15.516351. [PMID: 36415470 PMCID: PMC9681040 DOI: 10.1101/2022.11.15.516351] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Adaptive immune responses are induced by vaccination and infection, yet little is known about how CD4+ T cell memory differs when primed in these two contexts. Notably, viral infection is generally associated with higher levels of systemic inflammation than is vaccination. To assess whether the inflammatory milieu at the time of CD4+ T cell priming has long-term effects on memory, we compared Spike-specific memory CD4+ T cells in 22 individuals around the time of the participants' third SARS-CoV-2 mRNA vaccination, with stratification by whether the participants' first exposure to Spike was via virus or mRNA vaccine. Multimodal single-cell profiling of Spike-specific CD4+ T cells revealed 755 differentially expressed genes that distinguished infection- and vaccine-primed memory CD4+ T cells. Spike-specific CD4+ T cells from infection-primed individuals had strong enrichment for cytotoxicity and interferon signaling genes, whereas Spike-specific CD4+ T cells from vaccine-primed individuals were enriched for proliferative pathways by gene set enrichment analysis. Moreover, Spike-specific memory CD4+ T cells established by infection had distinct epigenetic landscapes driven by enrichment of IRF-family transcription factors, relative to T cells established by mRNA vaccination. This transcriptional imprint was minimally altered following subsequent mRNA vaccination or breakthrough infection, reflecting the strong bias induced by the inflammatory environment during initial memory differentiation. Together, these data suggest that the inflammatory context during CD4+ T cell priming is durably imprinted in the memory state at transcriptional and epigenetic levels, which has implications for personalization of vaccination based on prior infection history.
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Affiliation(s)
| | - Sabrina Solis
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Han M. Chen
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Clarice Monteiro
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Grace Ciabattoni
- Department of Microbiology, New York University School of Medicine; New York, NY, USA
| | - Marie I. Samanovic
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Amber R. Cornelius
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Tijaana Williams
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Emilie Geesey
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Miguel Rodriguez
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Mila Brum Ortigoza
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
| | - Ellie N. Ivanova
- Department of Pathology, New York University School of Medicine; New York, NY, USA
| | - Sergei B. Koralov
- Department of Pathology, New York University School of Medicine; New York, NY, USA
| | - Mark J. Mulligan
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
- Department of Microbiology, New York University School of Medicine; New York, NY, USA
| | - Ramin Sedaghat Herati
- Department of Medicine, New York University Grossman School of Medicine; New York, NY, USA
- Department of Microbiology, New York University School of Medicine; New York, NY, USA
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5
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Nian FS, Hou PS. Evolving Roles of Notch Signaling in Cortical Development. Front Neurosci 2022; 16:844410. [PMID: 35422684 PMCID: PMC9001970 DOI: 10.3389/fnins.2022.844410] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 02/15/2022] [Indexed: 01/09/2023] Open
Abstract
Expansion of the neocortex is thought to pave the way toward acquisition of higher cognitive functions in mammals. The highly conserved Notch signaling pathway plays a crucial role in this process by regulating the size of the cortical progenitor pool, in part by controlling the balance between self-renewal and differentiation. In this review, we introduce the components of Notch signaling pathway as well as the different mode of molecular mechanisms, including trans- and cis-regulatory processes. We focused on the recent findings with regard to the expression pattern and levels in regulating neocortical formation in mammals and its interactions with other known signaling pathways, including Slit–Robo signaling and Shh signaling. Finally, we review the functions of Notch signaling pathway in different species as well as other developmental process, mainly somitogenesis, to discuss how modifications to the Notch signaling pathway can drive the evolution of the neocortex.
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Affiliation(s)
- Fang-Shin Nian
- Institute of Anatomy and Cell Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Brain Science, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Pei-Shan Hou
- Institute of Anatomy and Cell Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
- *Correspondence: Pei-Shan Hou,
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6
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Ge Y, Wang J, Zhang H, Li J, Ye M, Jin X. Fate of hematopoietic stem cells determined by Notch1 signaling (Review). Exp Ther Med 2022; 23:170. [PMID: 35069851 PMCID: PMC8764575 DOI: 10.3892/etm.2021.11093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 11/17/2021] [Indexed: 11/05/2022] Open
Abstract
Regulation of the fate of hematopoietic stem cells (HSCs), including silencing, self-renewal or differentiation into blood line cells, is crucial to maintain the homeostasis of the human blood system and prevent leukemia. Notch1, a key receptor in the Notch signaling pathway, plays an important regulatory role in these properties of HSCs, particularly in the maintenance of the stemness of HSCs. In recent decades, the ubiquitination modification of Notch1 has been gradually revealed, and also demonstrated to affect the proliferation and differentiation of HSCs. Therefore, a detailed elucidation of Notch1 and its ubiquitination modification may help to improve understanding of the maintenance of HSC properties and the pathogenesis of leukemia. In addition, it may aid in identifying potential therapeutic targets for specific leukemias and provide potential prognostic indicators for HSC transplantation (HSCT). In the present review, the association between Notch1 and HSCs and the link between the ubiquitination modification of Notch1 and HSCs were described. In addition, the association between abnormal HSCs mediated by Notch1 or ubiquitinated Notch1and T-cell acute lymphoblastic leukemia (T-ALL) was also examined, which provides a promising direction for clinical application.
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Affiliation(s)
- Yidong Ge
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Jie Wang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Hui Zhang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Jinyun Li
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Meng Ye
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China
| | - Xiaofeng Jin
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
- Department of Biochemistry and Molecular Biology, and Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P.R. China
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7
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Dong Y, Guo H, Wang D, Tu R, Qing G, Liu H. Genome-Wide Analysis Identifies Rag1 and Rag2 as Novel Notch1 Transcriptional Targets in Thymocytes. Front Cell Dev Biol 2021; 9:703338. [PMID: 34322489 PMCID: PMC8311795 DOI: 10.3389/fcell.2021.703338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/15/2021] [Indexed: 12/04/2022] Open
Abstract
Recombination activating genes 1 (Rag1) and Rag2 are expressed in immature lymphocytes and essential for generating the vast repertoire of antigen receptors. Yet, the mechanisms governing the transcription of Rag1 and Rag2 remain to be fully determined, particularly in thymocytes. Combining cDNA microarray and ChIP-seq analysis, we identify Rag1 and Rag2 as novel Notch1 transcriptional targets in acute T-cell lymphoblastic leukemia (T-ALL) cells. We further demonstrate that Notch1 transcriptional complexes directly bind the Rag1 and Rag2 locus in not only T-ALL but also primary double negative (DN) T-cell progenitors. Specifically, dimeric Notch1 transcriptional complexes activate Rag1 and Rag2 through a novel cis-element bearing a sequence-paired site (SPS). In T-ALL and DN cells, dimerization-defective Notch1 causes compromised Rag1 and Rag2 expression; conversely, dimerization-competent Notch1 achieves optimal upregulation of both. Collectively, these results reveal Notch1 dimerization-mediated transcription as one of the mechanisms for activating Rag1 and Rag2 expression in both primary and transformed thymocytes. Our data suggest a new role of Notch1 dimerization in compelling efficient TCRβ rearrangements in DN progenitors during T-cell development.
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Affiliation(s)
- Yang Dong
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Hao Guo
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Donghai Wang
- Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Rongfu Tu
- Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Guoliang Qing
- Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Hudan Liu
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
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8
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Wu L, Li X, Lin Q, Chowdhury F, Mazumder MH, Du W. FANCD2 and HES1 suppress inflammation-induced PPARɣ to prevent haematopoietic stem cell exhaustion. Br J Haematol 2021; 192:652-663. [PMID: 33222180 PMCID: PMC7856217 DOI: 10.1111/bjh.17230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/12/2020] [Accepted: 10/16/2020] [Indexed: 12/18/2022]
Abstract
The Fanconi anaemia protein FANCD2 suppresses PPARƔ to maintain haematopoietic stem cell's (HSC) function; however, the underlying mechanism is not known. Here we show that FANCD2 acts in concert with the Notch target HES1 to suppress inflammation-induced PPARƔ in HSC maintenance. Loss of HES1 exacerbates FANCD2-KO HSC defects. However, deletion of HES1 does not cause more severe inflammation-mediated HSC defects in FANCD2-KO mice, indicating that both FANCD2 and HES1 are required for limiting detrimental effects of inflammation on HSCs. Further analysis shows that both FANCD2 and HES1 are required for transcriptional repression of inflammation-activated PPARg promoter. Inflammation orchestrates an overlapping transcriptional programme in HSPCs deficient for FANCD2 and HES1, featuring upregulation of genes in fatty acid oxidation (FAO) and oxidative phosphorylation. Loss of FANCD2 or HES1 augments both basal and inflammation-primed FAO. Targeted inhibition of PPARƔ or the mitochondrial carnitine palmitoyltransferase-1 (CPT1) reduces FAO and ameliorates HSC defects in inflammation-primed HSPCs deleted for FANCD2 or HES1 or both. Finally, depletion of PPARg or CPT1 restores quiescence in these mutant HSCs under inflammatory stress. Our results suggest that this novel FANCD2/HES1/PPARƔ axis may constitute a key component of immunometabolic regulation, connecting inflammation, cellular metabolism and HSC function.
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Affiliation(s)
- Limei Wu
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University
| | - Xue Li
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University
| | - Qiqi Lin
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University
| | - Fabliha Chowdhury
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University
| | - Md H. Mazumder
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University
| | - Wei Du
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program, West Virginia University Cancer Institute, Morgantown, WV
- Division of Hematology and Oncology, University of Pittsburgh School of Medicine
- Genome Stability Program, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
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9
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Mukherjee M, Ratnayake I, Janga M, Fogarty E, Scheidt S, Grassmeyer J, deRiso J, Chandrasekar I, Ahrenkiel P, Kopan R, Surendran K. Notch signaling regulates Akap12 expression and primary cilia length during renal tubule morphogenesis. FASEB J 2020; 34:9512-9530. [PMID: 32474964 DOI: 10.1096/fj.201902358rr] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 05/05/2020] [Accepted: 05/08/2020] [Indexed: 12/23/2022]
Abstract
Alagille syndrome patients present with loss of function mutations in either JAG1 or NOTCH2. About 40%-50% of patients have kidney abnormalities, and frequently display multicystic, dysplastic kidneys. Additionally, gain-of-function mutations in NOTCH2 are associated with cystic kidneys in Hajdu-Cheney syndrome patients. How perturbations in Notch signaling cause renal tubular cysts remains unclear. Here, we have determined that reduced Notch signaling mediated transcription by ectopic expression of dominant-negative mastermind-like (dnMaml) peptide in the nephrogenic epithelia from after the s-shaped body formation and in the developing collecting ducts results in proximal tubular and collecting duct cysts, respectively. An acute inhibition of Notch signaling for two days during kidney development is sufficient to disrupt tubule formation, and significantly increases Akap12 expression. Ectopic expression of Akap12 in renal epithelia results in abnormally long primary cilia similar to that observed in Notch-signaling-deficient epithelia. Both loss of Notch signaling and elevated Akap12 expression disrupt the ability of renal epithelial cells to form spherical structures with a single lumen when grown embedded in matrix. Interestingly, Akap12 can inhibit Notch signaling mediated transcription, which likely explains how both loss of Notch signaling and ectopic expression of Akap12 result in similar renal epithelial abnormalities. We conclude that Notch signaling regulates Akap12 expression while also ensuring normal primary cilia length and renal epithelial morphogenesis, and suggest that one aspect of diseases associated with defective Notch signaling, such as Alagille syndrome, maybe mechanistically related to ciliopathies.
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Affiliation(s)
- Malini Mukherjee
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, USA
| | - Ishara Ratnayake
- Department of Nanoscience and Nanoengineering, South Dakota School of Mines and Technology, Rapid City, SD, USA
| | - Madhusudhana Janga
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, USA
| | - Eric Fogarty
- Division of Basic Biomedical Sciences, Sanford School of Medicine, University of South Dakota, Vermillion, SD, USA
| | - Shania Scheidt
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, USA
| | | | - Jennifer deRiso
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, USA
| | - Indra Chandrasekar
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, USA.,Enabling Technologies Group, Sanford Research, Sioux Falls, SD, USA
| | - Phil Ahrenkiel
- Department of Nanoscience and Nanoengineering, South Dakota School of Mines and Technology, Rapid City, SD, USA
| | - Raphael Kopan
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kameswaran Surendran
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, USA.,Department of Pediatrics, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD, USA
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10
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Ma Z, Xu J, Wu L, Wang J, Lin Q, Chowdhury FA, Mazumder MHH, Hu G, Li X, Du W. Hes1 deficiency causes hematopoietic stem cell exhaustion. Stem Cells 2020; 38:756-768. [PMID: 32129527 PMCID: PMC7260087 DOI: 10.1002/stem.3169] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/28/2020] [Accepted: 02/19/2020] [Indexed: 12/19/2022]
Abstract
The transcriptional repressor Hairy Enhancer of Split 1 (HES1) plays an essential role in the development of many organs by promoting the maintenance of stem/progenitor cells, controlling the reversibility of cellular quiescence, and regulating both cell fate decisions. Deletion of Hes1 in mice results in severe defects in multiple organs and is lethal in late embryogenesis. Here we have investigated the role of HES1 in hematopoiesis using a hematopoietic lineage‐specific Hes1 knockout mouse model. We found that while Hes1 is dispensable for steady‐state hematopoiesis, Hes1‐deficient hematopoietic stem cells (HSCs) undergo exhaustion under replicative stress. Loss of Hes1 upregulates the expression of genes involved in PPARγ signaling and fatty acid metabolism pathways, and augments fatty acid oxidation (FAO) in Hes1f/fVav1Cre HSCs and progenitors. Functionally, PPARγ targeting or FAO inhibition ameliorates the repopulating defects of Hes1f/fVav1Cre HSCs through improving quiescence in HSCs. Lastly, transcriptome analysis reveals that disruption of Hes1 in hematopoietic lineage alters expression of genes critical to HSC function, PPARγ signaling, and fatty acid metabolism. Together, our findings identify a novel role of HES1 in regulating stress hematopoiesis and provide mechanistic insight into the function of HES1 in HSC maintenance.
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Affiliation(s)
- Zhilin Ma
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, People's Republic of China
| | - Jian Xu
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, People's Republic of China
| | - Limei Wu
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Junjie Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Qiqi Lin
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, People's Republic of China
| | - Fabliha A Chowdhury
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Md Habibul H Mazumder
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Gangqing Hu
- Department of Microbiology, Immunology and Cell Biology, School of Medicine, West Virginia University, Morgantown, West Virginia, USA.,Bioinformatics Core, West Virginia University, Morgantown, West Virginia, USA
| | - Xue Li
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, People's Republic of China
| | - Wei Du
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program, West Virginia University Cancer Institute, Morgantown, West Virginia, USA
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11
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Gianni F, Belver L, Ferrando A. The Genetics and Mechanisms of T-Cell Acute Lymphoblastic Leukemia. Cold Spring Harb Perspect Med 2020; 10:a035246. [PMID: 31570389 PMCID: PMC7050584 DOI: 10.1101/cshperspect.a035246] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy derived from early T-cell progenitors. The recognition of clinical, genetic, transcriptional, and biological heterogeneity in this disease has already translated into new prognostic biomarkers, improved leukemia animal models, and emerging targeted therapies. This work reviews our current understanding of the molecular mechanisms of T-ALL.
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Affiliation(s)
- Francesca Gianni
- Institute for Cancer Genetics, Columbia University Medical Center, New York, New York 10032, USA
| | - Laura Belver
- Institute for Cancer Genetics, Columbia University Medical Center, New York, New York 10032, USA
| | - Adolfo Ferrando
- Institute for Cancer Genetics, Columbia University Medical Center, New York, New York 10032, USA
- Department of Pathology, Columbia University Medical Center, New York, New York 10032, USA
- Department of Pediatrics, Columbia University Medical Center, New York, New York 10032, USA
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12
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Zhang J, Sun W, Kong X, Zhang Y, Yang HJ, Ren C, Jiang Y, Chen M, Chen X. Mutant p53 antagonizes p63/p73-mediated tumor suppression via Notch1. Proc Natl Acad Sci U S A 2019; 116:24259-24267. [PMID: 31712410 PMCID: PMC6883818 DOI: 10.1073/pnas.1913919116] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
p53 is the most frequently mutated gene in human cancers and mutant p53 has a gain of function (GOF) that promotes tumor progression and therapeutic resistance. One of the major GOF activities of mutant p53 is to suppress 2 other p53 family proteins, p63 and p73. However, the molecular basis is not fully understood. Here, we examined whether mutant p53 antagonizes p63/p73-mediated tumor suppression in vivo by using mutant p53-R270H knockin and TAp63/p73-deficient mouse models. We found that knockin mutant p53-R270H shortened the life span of p73+/- mice and subjected TAp63+/- or p73+/- mice to T lymphoblastic lymphomas (TLBLs). To unravel the underlying mechanism, we showed that mutant p53 formed a complex with Notch1 intracellular domain (NICD) and antagonized p63/p73-mediated repression of HES1 and ECM1. As a result, HES1 and ECM1 were overexpressed in TAp63+/- ;p53R270H/- and p73+/- ;p53R270H/- TLBLs, suggesting that normal function of HES1 and ECM1 in T cell activation is hyperactivated, leading to lymphomagenesis. Together, our data reveal a previously unappreciated mechanism by which GOF mutant p53 hijacks the p63/p73-regulated transcriptional program via the Notch1 pathway.
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Affiliation(s)
- Jin Zhang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616;
| | - Wenqiang Sun
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616
| | - Xiangmudong Kong
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616
| | - Yanhong Zhang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616
| | - Hee Jung Yang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616
| | - Cong Ren
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616
| | - Yuqian Jiang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616
| | - Mingyi Chen
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Xinbin Chen
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California, Davis, CA 95616;
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13
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Zhu Q, Li C, Wang K, Yue S, Jiang L, Ke M, Busuttil RW, Kupiec-Weglinski JW, Zhang F, Lu L, Ke B. Phosphatase and tensin homolog-β-catenin signaling modulates regulatory T cells and inflammatory responses in mouse liver ischemia/reperfusion injury. Liver Transpl 2017; 23:813-825. [PMID: 28152578 PMCID: PMC5449221 DOI: 10.1002/lt.24735] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 01/19/2017] [Indexed: 12/06/2022]
Abstract
The phosphatase and tensin homolog (PTEN) deleted on chromosome 10 plays an important role in regulating T cell activation during inflammatory response. Activation of β-catenin is crucial for maintaining immune homeostasis. This study investigates the functional roles and molecular mechanisms by which PTEN-β-catenin signaling promotes regulatory T cell (Treg) induction in a mouse model of liver ischemia/reperfusion injury (IRI). We found that mice with myeloid-specific phosphatase and tensin homolog knockout (PTENM-KO ) exhibited reduced liver damage as evidenced by decreased levels of serum alanine aminotransferase, intrahepatic macrophage trafficking, and proinflammatory mediators compared with the PTEN-proficient (floxed phosphatase and tensin homolog [PTENFL/FL ]) controls. Disruption of myeloid PTEN-activated b-catenin promoted peroxisome proliferator-activated receptor gamma (PPARγ)-mediated Jagged-1/Notch signaling and induced forkhead box P3 (FOXP3)1 Tregs while inhibiting T helper 17 cells. However, blocking of Notch signaling by inhibiting γ-secretase reversed myeloid PTEN deficiency-mediated protection in ischemia/reperfusion-triggered liver inflammation with reduced FOXP3+ and increased retinoid A receptor-related orphan receptor gamma t-mediated interleukin 17A expression in ischemic livers. Moreover, knockdown of β-catenin or PPARγ in PTEN-deficient macrophages inhibited Jagged-1/Notch activation and reduced FOXP3+ Treg induction, leading to increased proinflammatory mediators in macrophage/T cell cocultures. In conclusion, our findings demonstrate that PTEN-β-catenin signaling is a novel regulator involved in modulating Treg development and provides a potential therapeutic target in liver IRI. Liver Transplantation 23 813-825 2017 AASLD.
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Affiliation(s)
- Qiang Zhu
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA,Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Changyong Li
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA,Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Kunpeng Wang
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Shi Yue
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Longfeng Jiang
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Michael. Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Ronald. W. Busuttil
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Jerzy. W. Kupiec-Weglinski
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Feng Zhang
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,Corresponding authors: Bibo Ke, MD, PhD, The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA. Tel: (310) 794-7557; Fax: (310) 267-2367; , Ling Lu, MD, PhD or Feng Zhang, MD, PhD, Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China. Tel: +86 25 83718836; Fax: +86 25 83672106. , or
| | - Ling Lu
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,Corresponding authors: Bibo Ke, MD, PhD, The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA. Tel: (310) 794-7557; Fax: (310) 267-2367; , Ling Lu, MD, PhD or Feng Zhang, MD, PhD, Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China. Tel: +86 25 83718836; Fax: +86 25 83672106. , or
| | - Bibo Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA,Corresponding authors: Bibo Ke, MD, PhD, The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA. Tel: (310) 794-7557; Fax: (310) 267-2367; , Ling Lu, MD, PhD or Feng Zhang, MD, PhD, Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China. Tel: +86 25 83718836; Fax: +86 25 83672106. , or
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14
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Wang LQ, Liu JC, Chen CL, Cheng SF, Sun XF, Zhao Y, Yin S, Hou ZM, Pan B, Ding C, Shen W, Zhang XF. Regulation of primordial follicle recruitment by cross-talk between the Notch and phosphatase and tensin homologue (PTEN)/AKT pathways. Reprod Fertil Dev 2017; 28:700-12. [PMID: 25344626 DOI: 10.1071/rd14212] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 09/11/2014] [Indexed: 12/22/2022] Open
Abstract
The growth of oocytes and the development of follicles require certain pathways involved in cell proliferation and survival, such as the phosphatidylinositol 3-kinase (PI3K) pathway and the Notch signalling pathway. The aim of the present study was to investigate the interaction between Notch and the PI3K/AKT signalling pathways and their effects on primordial follicle recruitment. When the Notch pathway was inhibited by L-685,458 or N-[N-(3,5-difluorophenacetyl)-l-alanyl]-S-phenylglycinet-butyl ester (DAPT) in vitro, the expression of genes in the pathway and the percentage of oocytes in growing follicles decreased significantly in mouse ovaries. By 2 days postpartum, ovaries exposed to DAPT, short interference (si) RNA against Notch1 or siRNA against Hairy and enhancer of split-1 (Hes1) had significantly decreased expression of HES1, the target protein of the Notch signalling pathway. In contrast, expression of phosphatase and tensin homologue (Pten), a negative regulator of the AKT signalling pathway, was increased significantly. Co immunoprecipitation (Co-IP) revealed an interaction between HES1 and PTEN. In addition, inhibition of the Notch signalling pathway suppressed AKT phosphorylation and the proliferation of granulosa cells. In conclusion, the recruitment of primordial follicles was affected by the proliferation of granulosa cells and regulation of the interaction between the Notch and PI3K/AKT signalling pathways.
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Affiliation(s)
- Lin-Qing Wang
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Jing-Cai Liu
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Chun-Lei Chen
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Shun-Feng Cheng
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Xiao-Feng Sun
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Yong Zhao
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Shen Yin
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Zhu-Mei Hou
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Bo Pan
- Department of Animal and Poultry Science, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Cheng Ding
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Wei Shen
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
| | - Xi-Feng Zhang
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao 266109, China
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15
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The NOTCH1-MYC highway toward T-cell acute lymphoblastic leukemia. Blood 2017; 129:1124-1133. [PMID: 28115368 DOI: 10.1182/blood-2016-09-692582] [Citation(s) in RCA: 160] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/14/2016] [Indexed: 12/21/2022] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is a highly proliferative hematologic malignancy that results from the transformation of immature T-cell progenitors. Aberrant cell growth and proliferation in T-ALL lymphoblasts are sustained by activation of strong oncogenic drivers promoting cell anabolism and cell cycle progression. Oncogenic NOTCH signaling, which is activated in more than 65% of T-ALL patients by activating mutations in the NOTCH1 gene, has emerged as a major regulator of leukemia cell growth and metabolism. T-ALL NOTCH1 mutations result in ligand-independent and sustained NOTCH1-receptor signaling, which translates into activation of a broad transcriptional program dominated by upregulation of genes involved in anabolic pathways. Among these, the MYC oncogene plays a major role in NOTCH1-induced transformation. As result, the oncogenic activity of NOTCH1 in T-ALL is strictly dependent on MYC upregulation, which makes the NOTCH1-MYC regulatory circuit an attractive therapeutic target for the treatment of T-ALL.
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16
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Figueiredo M, Silva JC, Santos AS, Proa V, Alcobia I, Zilhão R, Cidadão A, Neves H. Notch and Hedgehog in the thymus/parathyroid common primordium: Crosstalk in organ formation. Dev Biol 2016; 418:268-82. [DOI: 10.1016/j.ydbio.2016.08.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 08/12/2016] [Accepted: 08/13/2016] [Indexed: 12/30/2022]
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17
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TNF-alpha and Notch signaling regulates the expression of HOXB4 and GATA3 during early T lymphopoiesis. In Vitro Cell Dev Biol Anim 2016; 52:920-934. [PMID: 27251160 DOI: 10.1007/s11626-016-0055-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/04/2016] [Indexed: 10/21/2022]
Abstract
During the early thymus colonization, Notch signaling activation on hematopoietic progenitor cells (HPCs) drives proliferation and T cell commitment. Although these processes are driven by transcription factors such as HOXB4 and GATA3, there is no evidence that Notch directly regulates their transcription. To evaluate the role of NOTCH and TNF signaling in this process, human CD34+ HPCs were cocultured with OP9-DL1 cells, in the presence or absence of TNF. The use of a Notch signaling inhibitor and a protein synthesis inhibitor allowed us to distinguish primary effects, mediated by direct signaling downstream Notch and TNF, from secondary effects, mediated by de novo synthesized proteins. A low and physiologically relevant concentration of TNF promoted T lymphopoiesis in OP9-DL1 cocultures. TNF positively modulated the expression of both transcripts in a Notch-dependent manner; however, GATA3 induction was mediated by a direct mechanism, while HOXB4 induction was indirect. Induction of both transcripts was repressed by a GSK3β inhibitor, indicating that activation of canonical Wnt signaling inhibits rather than induces their expression. Our study provides novel evidences of the mechanisms integrating Notch and TNF-alpha signaling in the transcriptional induction of GATA3 and HOXB4. This mechanism has direct implications in the control of self-renewal, proliferation, commitment, and T cell differentiation.
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18
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HES1 in immunity and cancer. Cytokine Growth Factor Rev 2016; 30:113-7. [PMID: 27066918 DOI: 10.1016/j.cytogfr.2016.03.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 03/18/2016] [Accepted: 03/18/2016] [Indexed: 01/06/2023]
Abstract
Hairy and enhancer of split homolog-1 (HES1) is a part of an extensive family of basic helix-loop-helix (bHLH) proteins and plays a crucial role in the control and regulation of cell cycle, proliferation, cell differentiation, survival and apoptosis in neuronal, endocrine, T-lymphocyte progenitors as well as various cancers. HES1 is a transcription factor which is regulated by the NOTCH, Hedgehog and Wnt signalling pathways. Aberrant expression of these pathways is a common feature of cancerous cells. There appears to be a fine and complicated crosstalk at the molecular level between the various signalling pathways and HES1, which contributes to its effects on the immune response and cancers such as leukaemia. Several mechanisms have been proposed, including an enhanced invasiveness and metastasis by inducing epithelial mesenchymal transition (EMT), in addition to its strict requirement for tumour cell survival. In this review, we summarize the current biology and molecular mechanisms as well as its use as a clinical target in cancer therapeutics.
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19
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Seo W, Taniuchi I. Transcriptional regulation of early T-cell development in the thymus. Eur J Immunol 2016; 46:531-8. [DOI: 10.1002/eji.201545821] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 11/30/2015] [Accepted: 01/08/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Wooseok Seo
- Laboratory for Transcriptional Regulation; RIKEN Center for Integrative Medical Sciences; Yokohama Kanagawa Japan
| | - Ichiro Taniuchi
- Laboratory for Transcriptional Regulation; RIKEN Center for Integrative Medical Sciences; Yokohama Kanagawa Japan
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20
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Schnell SA, Ambesi-Impiombato A, Sanchez-Martin M, Belver L, Xu L, Qin Y, Kageyama R, Ferrando AA. Therapeutic targeting of HES1 transcriptional programs in T-ALL. Blood 2015; 125:2806-14. [PMID: 25784680 PMCID: PMC4424629 DOI: 10.1182/blood-2014-10-608448] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 03/10/2015] [Indexed: 11/20/2022] Open
Abstract
Oncogenic activation of NOTCH1 signaling plays a central role in the pathogenesis of T-cell acute lymphoblastic leukemia, with mutations on this signaling pathway affecting more than 60% of patients at diagnosis. However, the transcriptional regulatory circuitries driving T-cell transformation downstream of NOTCH1 remain incompletely understood. Here we identify Hairy and Enhancer of Split 1 (HES1), a transcriptional repressor controlled by NOTCH1, as a critical mediator of NOTCH1-induced leukemogenesis strictly required for tumor cell survival. Mechanistically, we demonstrate that HES1 directly downregulates the expression of BBC3, the gene encoding the PUMA BH3-only proapoptotic factor in T-cell acute lymphoblastic leukemia. Finally, we identify perhexiline, a small-molecule inhibitor of mitochondrial carnitine palmitoyltransferase-1, as a HES1-signature antagonist drug with robust antileukemic activity against NOTCH1-induced leukemias in vitro and in vivo.
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Affiliation(s)
| | | | | | - Laura Belver
- Institute for Cancer Genetics, Columbia University, New York, NY
| | - Luyao Xu
- Institute for Cancer Genetics, Columbia University, New York, NY
| | - Yue Qin
- Institute for Cancer Genetics, Columbia University, New York, NY
| | | | - Adolfo A Ferrando
- Institute for Cancer Genetics, Columbia University, New York, NY; Department of Pathology and Department of Pediatrics, Columbia University Medical Center, New York, NY
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21
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Krishnamoorthy V, Carr T, de Pooter RF, Emanuelle AO, Akinola EO, Gounari F, Kee BL. Repression of Ccr9 transcription in mouse T lymphocyte progenitors by the Notch signaling pathway. THE JOURNAL OF IMMUNOLOGY 2015; 194:3191-200. [PMID: 25710912 DOI: 10.4049/jimmunol.1402443] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The chemokine receptor CCR9 controls the immigration of multipotent hematopoietic progenitor cells into the thymus to sustain T cell development. Postimmigration, thymocytes downregulate CCR9 and migrate toward the subcapsular zone where they recombine their TCR β-chain and γ-chain gene loci. CCR9 is subsequently upregulated and participates in the localization of thymocytes during their selection for self-tolerant receptor specificities. Although the dynamic regulation of CCR9 is essential for early T cell development, the mechanisms controlling CCR9 expression have not been determined. In this article, we show that key regulators of T cell development, Notch1 and the E protein transcription factors E2A and HEB, coordinately control the expression of Ccr9. E2A and HEB bind at two putative enhancers upstream of Ccr9 and positively regulate CCR9 expression at multiple stages of T cell development. In contrast, the canonical Notch signaling pathway prevents the recruitment of p300 to the putative Ccr9 enhancers, resulting in decreased acetylation of histone H3 and a failure to recruit RNA polymerase II to the Ccr9 promoter. Although Notch signaling modestly modulates the binding of E proteins to one of the two Ccr9 enhancers, we found that Notch signaling represses Ccr9 in T cell lymphoma lines in which Ccr9 transcription is independent of E protein function. Our data support the hypothesis that activation of Notch1 has a dominant-negative effect on Ccr9 transcription and that Notch1 and E proteins control the dynamic expression of Ccr9 during T cell development.
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Affiliation(s)
- Veena Krishnamoorthy
- Committee on Molecular Pathogenesis and Molecular Medicine, The University of Chicago, Chicago, IL 60637
| | - Tiffany Carr
- Committee on Immunology, The University of Chicago, Chicago, IL 60637
| | - Renee F de Pooter
- Committee on Immunology, The University of Chicago, Chicago, IL 60637
| | | | | | - Fotini Gounari
- Committee on Immunology, The University of Chicago, Chicago, IL 60637; Section of Rheumatology, Department of Medicine, The University of Chicago, Chicago, IL 60637; and
| | - Barbara L Kee
- Committee on Molecular Pathogenesis and Molecular Medicine, The University of Chicago, Chicago, IL 60637; Committee on Immunology, The University of Chicago, Chicago, IL 60637; Department of Pathology, The University of Chicago, Chicago, IL 60637
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22
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Yui MA, Rothenberg EV. Developmental gene networks: a triathlon on the course to T cell identity. Nat Rev Immunol 2014; 14:529-45. [PMID: 25060579 PMCID: PMC4153685 DOI: 10.1038/nri3702] [Citation(s) in RCA: 230] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cells acquire their ultimate identities by activating combinations of transcription factors that initiate and sustain expression of the appropriate cell type-specific genes. T cell development depends on the progression of progenitor cells through three major phases, each of which is associated with distinct transcription factor ensembles that control the recruitment of these cells to the thymus, their proliferation, lineage commitment and responsiveness to T cell receptor signals, all before the allocation of cells to particular effector programmes. All three phases are essential for proper T cell development, as are the mechanisms that determine the boundaries between each phase. Cells that fail to shut off one set of regulators before the next gene network phase is activated are predisposed to leukaemic transformation.
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Affiliation(s)
- Mary A Yui
- Division of Biology 156-29, California Institute of Technology, Pasadena, California 91125, USA
| | - Ellen V Rothenberg
- Division of Biology 156-29, California Institute of Technology, Pasadena, California 91125, USA
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23
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Zhang Z, Yan R, Zhang Q, Li J, Kang X, Wang H, Huan L, Zhang L, Li F, Yang S, Zhang J, Ren X, Yang X. Hes1, a Notch signaling downstream target, regulates adult hippocampal neurogenesis following traumatic brain injury. Brain Res 2014; 1583:65-78. [PMID: 25084035 DOI: 10.1016/j.brainres.2014.07.037] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/21/2014] [Accepted: 07/22/2014] [Indexed: 01/23/2023]
Abstract
Hairy and enhancer of split 1 (Hes1), a downstream target of Notch signaling, has long been recognized as crucial in inhibiting neuronal differentiation. However, the role of Hes1 following traumatic brain injury (TBI) in adult neurogenesis in the mouse dentate gyrus (DG) remains partially understood. Here, we investigate the role of Hes1 in regulating neurogenesis in the DG of the adult hippocampus after TBI by up- or downregulating Hes1 expression. First, adenovirus-mediated gene transfection was employed to upregulate Hes1 in vivo. The mice were then subjected to TBI, and the hippocampal tissue was collected for Western blot analysis at designated times, pre- and post-injury. Moreover, the brain slices were stained for BrdU and doublecortin (DCX). We show that enhancing Hes1 inhibits the proliferation and differentiation of neural precursor cells (NPCs) in the DG of the hippocampus soon after TBI. Second, downregulation of Hes1 via RNA interference (RNAi) results in a significant increase in neuronal production and promotes the differentiation of NPCs into mature neurons in the DG, as assessed by BrdU and NeuN double staining. Furthermore, a Morris water maze (MWM) test clearly confirmed that the knockdown of Hes1 improves the spatial learning and memory capacity of adult mice following injury. Taken together, these observations suggest that Hes1 represents a negative regulator of adult neurogenesis post-TBI and that the precise space-time regulation of Hes1 expression in the DG may promote the recovery of neural function following TBI.
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Affiliation(s)
- Zhen Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
| | - Rong Yan
- Department of Neurosurgery, Tianjin 5th Central Hospital, Tianjin 300052, PR China.
| | - Qi Zhang
- Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou 256603, PR China.
| | - Jia Li
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
| | - Xiaokui Kang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
| | - Haining Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
| | - Linchun Huan
- Department of Neurosurgery, Linyi People׳s Hospital, Linyi 276000, PR China.
| | - Lin Zhang
- Department of Neurosurgery, Tianjin 5th Central Hospital, Tianjin 300052, PR China.
| | - Fan Li
- Department of Neurosurgery, Heji Hospital affiliated Changzhi Medical College, 271 Taihang East Road, Changzhi 046000, PR China.
| | - Shuyuan Yang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
| | - Jianning Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
| | - Xinliang Ren
- Department of Neurosurgery, Heji Hospital affiliated Changzhi Medical College, 271 Taihang East Road, Changzhi 046000, PR China.
| | - Xinyu Yang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, PR China; Tianjin Neurological Institute, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, 154 Anshan Road, Heping District, Tianjin 300052, PR China.
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Kobayashi T, Kageyama R. Expression Dynamics and Functions of Hes Factors in Development and Diseases. Curr Top Dev Biol 2014; 110:263-83. [DOI: 10.1016/b978-0-12-405943-6.00007-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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25
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Mukherjee S, Rasky AJ, Lundy PA, Kittan NA, Kunkel SL, Maillard IP, Kowalski PE, Kousis PC, Guidos CJ, Lukacs NW. STAT5-induced lunatic fringe during Th2 development alters delta-like 4-mediated Th2 cytokine production in respiratory syncytial virus-exacerbated airway allergic disease. THE JOURNAL OF IMMUNOLOGY 2013; 192:996-1003. [PMID: 24367028 DOI: 10.4049/jimmunol.1301991] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Notch activation plays an important role in T cell development and mature T cell differentiation. In this study, we investigated the role of Notch activation in a mouse model of respiratory syncytial virus (RSV)-exacerbated allergic airway disease. During RSV exacerbation, in vivo neutralization of a specific Notch ligand, Delta-like ligand (Dll)-4, significantly decreased airway hyperreactivity, mucus production, and Th2 cytokines. Lunatic Fringe (Lfng), a glycosyltransferase that enhances Notch activation by Dll4, was increased during RSV exacerbation. Lfng loss of function in Th2-skewed cells inhibited Dll4-Notch activation and subsequent IL-4 production. Further knockdown of Lfng in T cells in CD4Cre(+)Lfng(fl/fl) mice showed reduced Th2 response and disease pathology during RSV exacerbation. Finally, we identified STAT5-binding cis-acting regulatory element activation as a critical driver of Lfng transcriptional activation. These data demonstrate that STAT5-dependent amplification of Notch-modifying Lfng augments Th2 response via Dll4 and is critical for amplifying viral exacerbation during allergic airway disease.
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Affiliation(s)
- Sumanta Mukherjee
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109
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26
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De Obaldia ME, Bell JJ, Wang X, Harly C, Yashiro-Ohtani Y, DeLong JH, Zlotoff DA, Sultana DA, Pear WS, Bhandoola A. T cell development requires constraint of the myeloid regulator C/EBP-α by the Notch target and transcriptional repressor Hes1. Nat Immunol 2013; 14:1277-84. [PMID: 24185616 DOI: 10.1038/ni.2760] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 10/07/2013] [Indexed: 12/12/2022]
Abstract
Notch signaling induces gene expression of the T cell lineage and discourages alternative fate outcomes. Hematopoietic deficiency in the Notch target Hes1 results in severe T cell lineage defects; however, the underlying mechanism is unknown. We found here that Hes1 constrained myeloid gene-expression programs in T cell progenitor cells, as deletion of the myeloid regulator C/EBP-α restored the development of T cells from Hes1-deficient progenitor cells. Repression of Cebpa by Hes1 required its DNA-binding and Groucho-recruitment domains. Hes1-deficient multipotent progenitor cells showed a developmental bias toward myeloid cells and dendritic cells after Notch signaling, whereas Hes1-deficient lymphoid progenitor cells required additional cytokine signaling for diversion into the myeloid lineage. Our findings establish the importance of constraining developmental programs of the myeloid lineage early in T cell development.
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Affiliation(s)
- Maria Elena De Obaldia
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
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27
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Boudil A, Skhiri L, Candéias S, Pasqualetto V, Legrand A, Bedora-Faure M, Gautreau-Rolland L, Rocha B, Ezine S. Single-cell analysis of thymocyte differentiation: identification of transcription factor interactions and a major stochastic component in αβ-lineage commitment. PLoS One 2013; 8:e73098. [PMID: 24098325 PMCID: PMC3787938 DOI: 10.1371/journal.pone.0073098] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 07/18/2013] [Indexed: 01/06/2023] Open
Abstract
T cell commitment and αβ/γδ lineage specification in the thymus involves interactions between many different genes. Characterization of these interactions thus requires a multiparameter analysis of individual thymocytes. We developed two efficient single-cell methods: (i) the quantitative evaluation of the co-expression levels of nine different genes, with a plating efficiency of 99–100% and a detection limit of 2 mRNA molecules/cell; and (ii) single-cell differentiation cultures, in the presence of OP9 cells transfected with the thymus Notch1 ligand DeltaL4. We show that during T cell commitment, Gata3 has a fundamental, dose-dependent role in maintaining Notch1 expression, with thymocytes becoming T-cell-committed when they co-express Notch1, Gata3 and Bc11b. Of the transcription factor expression patterns studied here, only that of Bcl11b was suggestive of a role in Pu1 down-regulation. Individual thymocytes became αβ/γδ lineage-committed at very different stages (from the TN2a stage onwards). However, 20% of TN3 cells are not αβ/γδ-lineage committed and TN4 cells comprise two main subpopulations with different degrees of maturity. The existence of a correlation between differentiation potential and expression of the pre-TCR showed that 83% of αβ-committed cells do not express the pre-TCR and revealed a major stochastic component in αβ-lineage specification.
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Affiliation(s)
- Amine Boudil
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Lamia Skhiri
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Serge Candéias
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Chimie et Biologie des Métaux, UMR 549 Centre national de la recherche scientifique, Université Joseph Fourier, Grenoble, France
| | - Valérie Pasqualetto
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Agnès Legrand
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Marie Bedora-Faure
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Laetitia Gautreau-Rolland
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Benedita Rocha
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
| | - Sophie Ezine
- Institut National de la Santé et de la Recherche Médicale, Unité 1020, and Université Paris Descartes, Unité Mixte de Recherche, Paris, France
- * E-mail:
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28
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Yang Q, Monticelli LA, Saenz SA, Chi AWS, Sonnenberg GF, Tang J, De Obaldia ME, Bailis W, Bryson JL, Toscano K, Huang J, Haczku A, Pear WS, Artis D, Bhandoola A. T cell factor 1 is required for group 2 innate lymphoid cell generation. Immunity 2013; 38:694-704. [PMID: 23601684 DOI: 10.1016/j.immuni.2012.12.003] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Accepted: 12/13/2012] [Indexed: 12/19/2022]
Abstract
Group 2 innate lymphoid cells (ILC2) are innate lymphocytes that confer protective type 2 immunity during helminth infection and are also involved in allergic airway inflammation. Here we report that ILC2 development required T cell factor 1 (TCF-1, the product of the Tcf7 gene), a transcription factor also implicated in T cell lineage specification. Tcf7(-/-) mice lack ILC2, and were unable to mount ILC2-mediated innate type 2 immune responses. Forced expression of TCF-1 in bone marrow progenitors partially bypassed the requirement for Notch signaling in the generation of ILC2 in vivo. TCF-1 acted through both GATA-3-dependent and GATA-3-independent pathways to promote the generation of ILC2. These results are reminiscent of the critical roles of TCF-1 in early T cell development. Hence, transcription factors that underlie early steps of T cell development are also implicated in the development of innate lymphoid cells.
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Affiliation(s)
- Qi Yang
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
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29
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Kameda Y, Saitoh T, Nemoto N, Katoh T, Iseki S, Fujimura T. Hes1 is required for the development of pharyngeal organs and survival of neural crest-derived mesenchymal cells in pharyngeal arches. Cell Tissue Res 2013; 353:9-25. [PMID: 23686616 DOI: 10.1007/s00441-013-1649-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 04/25/2013] [Indexed: 10/26/2022]
Abstract
Hes genes are required to maintain diverse progenitor cell populations during embryonic development. Loss of Hes1 results in a spectrum of malformations of pharyngeal endoderm-derived organs, including the ultimobranchial body (progenitor of C cells), parathyroid, thymus and thyroid glands, together with highly penetrant C-cell aplasia (81%) and parathyroid aplasia (28%). The hypoplastic parathyroid and thymus are mostly located around the pharyngeal cavity, even at embryonic day (E) 15.5 to E18.5, indicating the failure of migration of the organs. To clarify the relationship between these phenotypes and neural crest cells, we examine fate mapping of neural crest cells colonized in pharyngeal arches in Hes1 null mutants by using the Wnt1-Cre/R26R reporter system. In null mutants, the number of neural crest cells labeled by X-gal staining is markedly decreased in the pharyngeal mesenchyme at E12.5 when the primordia of the thymus, parathyroid and ultimobranchial body migrate toward their destinations. Furthermore, phospho-Histone-H3-positive proliferating cells are reduced in number in the pharyngeal mesenchyme at this stage. Our data indicate that the development of pharyngeal organs and survival of neural-crest-derived mesenchyme in pharyngeal arches are critically dependent on Hes1. We propose that the defective survival of neural-crest-derived mesenchymal cells in pharyngeal arches directly or indirectly leads to deficiencies of pharyngeal organs.
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Affiliation(s)
- Yoko Kameda
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan.
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30
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Levidou G, Siakantaris M, Papadaki T, Papadavid E, Vassilakopoulos TP, Angelopoulou MK, Marinos L, Nikolaou V, Economidi A, Antoniou C, Patsouris E, Korkolopoulou P. A comprehensive immunohistochemical approach of AKT/mTOR pathway and p-STAT3 in mycosis fungoides. J Am Acad Dermatol 2013; 69:375-84. [PMID: 23685026 DOI: 10.1016/j.jaad.2013.04.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 12/19/2012] [Accepted: 04/08/2013] [Indexed: 01/11/2023]
Abstract
BACKGROUND Although the expression pattern of phosphorylated (p)-mTOR pathway components has attracted scientific interest in several neoplasms, to our knowledge, there is no published information regarding its significance in mycosis fungoides (MF). OBJECTIVE We sought to perform a comprehensive simultaneous assessment of key members of AKT/mTOR pathway along with p-extracellular signal-regulated kinase (ERK), NOTCH1, and p-STAT3 in patients with MF. METHODS In all, 54 skin biopsy specimens (21 tumors, 30 plaques, and 3 folliculotropic MF) from 50 patients with MF were analyzed immunohistochemically for p-mTOR, its upstream p-AKT, its downstream effectors p-p70S6K and p-4E-BP1, and for p-ERK1/2, NOTCH1, and p-STAT3. RESULTS p-mTOR was coexpressed with p-p70S6K in 67.3% of lesions, but coexpression with other molecules was less common. p-p70S6K and marginally NOTCH1 displayed higher H-scores in tumors than in plaques. Significant correlations were recorded between p-ERK and p-4E-BP1, as well as between NOTCH1 and p-p70S6K or p-4E-BP1. NOTCH1, p-4E-BP1, and p-p70S6K expression were associated with advanced stage. In survival analysis simultaneous overexpression of p-AKT and p-p70S6K, along with p-4E-BP1 positivity, adversely affected cancer-specific, disease-free, and progression-free survival in advanced-stage cases. LIMITATIONS A limitation may be the small number of cases included in our investigation, precluding multivariate survival analysis. CONCLUSIONS Activation of AKT/mTOR pathway in MF appears to be correlated with NOTCH1, p-ERK, and p-STAT3 and is implicated in the acquisition of a more aggressive phenotype. The combination of p-AKT, p-p70S6K, and p-4E-BP1 emerges as a significant potential prognostic marker in patients with advanced stage.
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Affiliation(s)
- Georgia Levidou
- Department of Pathology, University of Athens, Medical School, Athens, Greece.
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31
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Feyler S, Selby PJ, Cook G. Regulating the regulators in cancer-immunosuppression in multiple myeloma (MM). Blood Rev 2013; 27:155-64. [PMID: 23623928 DOI: 10.1016/j.blre.2013.04.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An effective immune response requires a prompt but measured action against the pathological insult, to prevent over-zealous inflammatory-mediated tissue destruction. In cancer, defective or incompetent immune responses may paradoxically result in disease progression despite an immune attempt at elimination. Tumour-induced immunosuppression may not only result from soluble factors and altered antigenicity, but also from cellular-mediated tumour-induced immune evasion. Multiple myeloma (MM) is associated with both cellular and humoral immune deficiencies and increased T(Reg) cells. In vitro modelling has indicated that the tumour cells directly induce functional T(Reg) cells. In light of this recent evidence, it now seems that the most promising and synergistic approaches for cancer immunotherapy would involve specific anti-tumour immunity and simultaneous reduction of tumour-induced immune-regulation. This review sets out the basic understanding of the human immune response, its dysregulation in cancer and proposes how this knowledge may influence future treatment strategies to maximise the anti-tumour immune response.
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Affiliation(s)
- Sylvia Feyler
- Transplant Immunology Group, Academic Department of Haematology & Oncology, University of Leeds, UK
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32
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Guiu J, Shimizu R, D'Altri T, Fraser ST, Hatakeyama J, Bresnick EH, Kageyama R, Dzierzak E, Yamamoto M, Espinosa L, Bigas A. Hes repressors are essential regulators of hematopoietic stem cell development downstream of Notch signaling. ACTA ACUST UNITED AC 2012; 210:71-84. [PMID: 23267012 PMCID: PMC3549704 DOI: 10.1084/jem.20120993] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Previous studies have identified Notch as a key regulator of hematopoietic stem cell (HSC) development, but the underlying downstream mechanisms remain unknown. The Notch target Hes1 is widely expressed in the aortic endothelium and hematopoietic clusters, though Hes1-deficient mice show no overt hematopoietic abnormalities. We now demonstrate that Hes is required for the development of HSC in the mouse embryo, a function previously undetected as the result of functional compensation by de novo expression of Hes5 in the aorta/gonad/mesonephros (AGM) region of Hes1 mutants. Analysis of embryos deficient for Hes1 and Hes5 reveals an intact arterial program with overproduction of nonfunctional hematopoietic precursors and total absence of HSC activity. These alterations were associated with increased expression of the hematopoietic regulators Runx1, c-myb, and the previously identified Notch target Gata2. By analyzing the Gata2 locus, we have identified functional RBPJ-binding sites, which mutation results in loss of Gata2 reporter expression in transgenic embryos, and functional Hes-binding sites, which mutation leads to specific Gata2 up-regulation in the hematopoietic precursors. Together, our findings show that Notch activation in the AGM triggers Gata2 and Hes1 transcription, and next HES-1 protein represses Gata2, creating an incoherent feed-forward loop required to restrict Gata2 expression in the emerging HSCs.
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Affiliation(s)
- Jordi Guiu
- Program in Cancer Research, Hospital del Mar Medical Research Institute, IMIM, Barcelona Biomedical Research Park, 08003 Barcelona, Spain
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33
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Abstract
The mouse thymus supports T-cell development, but also contains non-T-cell lineages such as dendritic cells, macrophages, and granulocytes that are necessary for T-cell repertoire selection and apoptotic thymocyte clearance. Early thymic progenitors (ETPs) are not committed to the T-cell lineage, as demonstrated by both in vitro and in vivo assays. Whether ETPs realize non-T-cell lineage potentials in vivo is not well understood and indeed is controversial. In the present study, we investigated whether ETPs are the major precursors of any non-T-lineage cells in the thymus. We analyzed the development of these populations under experimental circumstances in which ETPs are nearly absent due to either abrogated thymic settling or inhibition of early thymic development by genetic ablation of IL-7 receptorα or Hes1. Results obtained using multiple in vivo approaches indicate that the majority of thymic granulocytes derive from ETPs. These data indicate that myelolymphoid progenitors settle the thymus and thus clarify the pathways by which stem cells give rise to downstream blood cell lineages.
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HES1 opposes a PTEN-dependent check on survival, differentiation, and proliferation of TCRβ-selected mouse thymocytes. Blood 2012; 120:1439-48. [PMID: 22649105 DOI: 10.1182/blood-2011-12-395319] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The developmental progression of immature thymocytes requires cooperative input from several pathways, with Notch signals playing an indispensable role at the T-cell receptor (TCR)-β selection checkpoint. Notch signals affect the activation of the PI3K/Akt pathway, which is required for pTα/TCRβ (pre-TCR)-induced survival, differentiation, and proliferation of developing αβ-lineage thymocytes. However, the molecular players responsible for the interaction between the Notch and PI3K pathways at this critical developmental stage are unknown. Here, we show that Notch induction of Hes1 is necessary to repress the PI3K/Akt pathway inhibitor, PTEN (phosphatase and tensin homolog), which in turn facilitates pre-TCR-induced differentiation. In support of this mechanism, deletion or down-regulation of Pten overcomes the Notch signaling requirement for survival and differentiation during β-selection. In addition, c-Myc is a critical target of Notch at this stage, as c-Myc expression overcomes the Notch signaling requirement for proliferation during β-selection. Collectively, our results point to HES1, via repression of PTEN, and c-Myc as critical mediators of Notch function at the β-selection checkpoint.
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35
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Tian C, Zheng G, Cao Z, Li Q, Ju Z, Wang J, Yuan W, Cheng T. Hes1 mediates the different responses of hematopoietic stem and progenitor cells to T cell leukemic environment. Cell Cycle 2012; 12:322-31. [PMID: 23255132 DOI: 10.4161/cc.23160] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Normal hematopoiesis is suppressed during the development of leukemia. In the T-ALL leukemia mouse model described in our recent study (Hu X, et al. Blood 2009), the impacts of leukemic environment on normal hematopoietic stem cells (HSCs) and hematopoietic progenitor cells (HPCs) were distinct, in that normal HSCs were preserved in part because of increased mitotic quiescence of HSCs and resulting exhaustion of HPCs proliferation. Stem cell factor (SCF) secreted by leukemic cells in Nalm6 B-ALL model was previously suggested to force normal HSCs/HPCs out of their bone marrow niches and allow leukemic cells to occupy the niches (Colmone A, et al. Science 2008). Here we found that stem cell factor (SCF) expression in PB and BM of T-ALL model was increased, but SCF mRNA and protein levels in normal hematopoietic cells were higher than those in leukemia cells, which suggested that upregulated SCF was mainly contributed by non-leukemic cells in response to the leukemia development. To further elucidate the molecular mechanisms, microarray analysis was conducted on normal HSCs in this model and verified by real-time RT-PCR. The expression of Hes1 and its downstream target p21 were elevated in normal HSCs, whereas their expression showed no significant alteration in HPCs. Interestingly, although overexpression of Hes1 by retroviral infection inhibited the in vitro colony formation of normal hematopoietic cells, in vivo results demonstrated that normal Lin(-) cells and HSPCs were better preserved when normal Lin(-) cells with Hes1 overexpression were co-transplanted with T-ALL leukemia cells. Our results suggested that the differential expression of Hes1 between HSCs and HPCs resulted in the distinct responses of these cells to the leukemic condition, and that overexpression of Hes1 could enhance normal HSPCs in the leukemic environment.
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Affiliation(s)
- Chen Tian
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
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36
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Abstract
Abstract
Notch signaling pathway regulates many different events of embryonic and adult development; among them, Notch plays an essential role in the onset of hematopoietic stem cells and influences multiple maturation steps of developing lymphoid and myeloid cells. Deregulation of Notch signaling determines several human disorders, including cancer. In the last decade it became evident that Notch signaling plays pivotal roles in the onset and development of T- and B-cell acute lymphoblastic leukemia by regulating the intracellular molecular pathways involved in leukemia cell survival and proliferation. On the other hand, bone marrow stromal cells are equally necessary for leukemia cell survival by preventing blast cell apoptosis and favoring their reciprocal interactions and cross-talk with bone marrow microenvironment. Quite surprisingly, the link between Notch signaling pathway and bone marrow stromal cells in acute lymphoblastic leukemia has been pointed out only recently. In fact, bone marrow stromal cells express Notch receptors and ligands, through which they can interact with and influence normal and leukemia T- and B-cell survival. Here, the data concerning the development of T- and B-cell acute lymphoblastic leukemia has been critically reviewed in light of the most recent findings on Notch signaling in stromal microenvironment.
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Wang Y, Liu Y, Malek SN, Zheng P, Liu Y. Targeting HIF1α eliminates cancer stem cells in hematological malignancies. Cell Stem Cell 2011; 8:399-411. [PMID: 21474104 DOI: 10.1016/j.stem.2011.02.006] [Citation(s) in RCA: 320] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 12/11/2010] [Accepted: 02/04/2011] [Indexed: 02/07/2023]
Abstract
Molecular targeting of cancer stem cells (CSCs) has therapeutic potential for efficient treatment of cancer, although relatively few specific targets have been identified so far. Hypoxia-inducible factor (HIF) was recently shown to regulate the tumorigenic capacity of glioma stem cells under hypoxic conditions. Surprisingly, we found that, under normoxia, HIF1α signaling was selectively activated in the stem cells of mouse lymphoma and human acute myeloid leukemia (AML). HIF1a shRNA and HIF inhibitors abrogated the colony-forming unit (cfu) activity of mouse lymphoma and human AML CSCs. Importantly, the HIF-inhibitor echinomycin efficiently eradicated mouse lymphoma and serially transplantable human AML in xenogeneic models by preferential elimination of CSCs. Hif1α maintains mouse lymphoma CSCs by repressing a negative feedback loop in the Notch pathway. Taken together, our results demonstrate an essential function of Hif1α-Notch interaction in maintaining CSCs and provide an effective approach to target CSCs for therapy of hematological malignancies.
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Affiliation(s)
- Yin Wang
- Division of Immunotherapy, Section of General Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
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Abstract
T cells are the key mediators in cell-mediated immunity. Their development and maturation involve a complex variety of interactions with nonlymphoid cell products and receptors. Highly specialized to defend against bacterial and viral infections, T cells also mediate immune surveillance against tumor cells and react to foreign tissues. T cell progenitors originate in the bone marrow and, through a series of defined and coordinated developmental stages, enter the thymus, differentiate, undergo selection, and eventually mature into functional T cells. The steps in this process are regulated through a complex transcriptional network, specific receptor-ligand pair interactions, and sensitization to trophic factors, which mediate the homing, proliferation, survival, and differentiation of developing T cells. This review examines the processes and pathways involved in the highly orchestrated development of T cell fate specification under physiological as well as pathological conditions.
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Affiliation(s)
- Ute Koch
- Ecole Polytechnique Fédérale de Lausanne, Swiss Institute for Experimental Cancer Research, 1015 Lausanne, Switzerland
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39
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Klinck R, Füchtbauer EM, Ahnfelt-Rønne J, Serup P, Jensen JN, Jørgensen MC. A BAC transgenic Hes1-EGFP reporter reveals novel expression domains in mouse embryos. Gene Expr Patterns 2011; 11:415-26. [PMID: 21745596 DOI: 10.1016/j.gep.2011.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 06/24/2011] [Accepted: 06/25/2011] [Indexed: 12/16/2022]
Abstract
Expression of the basic helix-loop-helix factor Hairy and Enhancer of Split-1 (Hes1) is required for normal development of a number of tissues during embryonic development. Depending on context, Hes1 may act as a Notch signalling effector which promotes the undifferentiated and proliferative state of progenitor cells, but increasing evidence also points to Notch independent regulation of Hes1 expression. Here we use high resolution confocal scanning of EGFP in a novel BAC transgenic mouse reporter line, Tg(Hes1-EGFP)(1Hri), to analyse Hes1 expression from embryonic day 7.0 (e7.0). Our data recapitulates some previous observations on Hes1 expression and suggests new, hitherto unrecognised expression domains including expression in the definitive endoderm at early somite stages before gut tube closure and thus preceding organogenesis. This mouse line will be a valuable tool for studies addressing the role of Hes1 in a number of different research areas including organ specification, development and regeneration.
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Affiliation(s)
- Rasmus Klinck
- Department of Beta Cell Regeneration, Hagedorn Research Institute, Gentofte, Denmark
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40
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Notch1 inhibition targets the leukemia-initiating cells in a Tal1/Lmo2 mouse model of T-ALL. Blood 2011; 118:1579-90. [PMID: 21670468 DOI: 10.1182/blood-2010-08-300343] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive malignancy largely caused by aberrant activation of the TAL1/SCL, LMO1/2, and NOTCH1 oncogenes. Approximately 30% of T-ALL patients relapse, and evidence is emerging that relapse may result from a failure to eliminate leukemia-initiating cells (LICs). Thymic expression of the Tal1 and Lmo2 oncogenes in mice results in rapid development of T-ALL; and similar to T-ALL patients, more than half the leukemic mice develop spontaneous mutations in Notch1. Using this mouse model, we demonstrate that mouse T-ALLs are immunophenotypically and functionally heterogeneous with approximately 1 of 10,000 leukemic cells capable of initiating disease on transplantation. Our preleukemic studies reveal expansion of Notch-active double-negative thymic progenitors, and we find the leukemic DN3 population enriched in disease potential. To examine the role of Notch1 in LIC function, we measured LIC activity in leukemic mice treated with vehicle or with a γ-secretase inhibitor. In 4 of 5 leukemias examined, Notch inhibition significantly reduced or eliminated LICs and extended survival. Remarkably, in 2 mice, γ-secretase inhibitor treatment reduced LIC frequency below the limits of detection of this assay, and all transplanted mice failed to develop disease. These data support the continued development of Notch1 therapeutics as antileukemia agents.
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41
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Abstract
Unlike conventional T cells, which are exported from the thymus as naive cells and acquire effector functions upon antigen encounter in the periphery, a subset of γδ T cells differentiates into effectors that produce IL-17 within the fetal thymus. We demonstrate here that intrathymic development of the naturally occurring IL-17-producing γδ T cells is independent of STAT3 and partly dependent on RORγt. Comparative gene-expression analysis identified Hes1, one of the basic helix-loop-helix proteins involved in Notch signaling, as a factor specifically expressed in IL-17-producing γδ T cells. Hes1 is critically involved in the development of IL-17-producing γδ T cells, as evidenced by their severe decrease in the thymi of Hes1-deficient fetal mice. Delta-like 4 (Dll4)-expressing stromal cells support the development of IL-17-producing γδ T cells in vitro. In addition, conditional Hes1 ablation in peripheral γδ T cells decreases their IL-17 production but not their IFN-γ production. These results reveal a unique differentiation pathway of IL-17-producing γδ T cells.
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42
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Hosoya T, Maillard I, Engel JD. From the cradle to the grave: activities of GATA-3 throughout T-cell development and differentiation. Immunol Rev 2011; 238:110-25. [PMID: 20969588 DOI: 10.1111/j.1600-065x.2010.00954.x] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
GATA family transcription factors play multiple vital roles in hematopoiesis in many cell lineages, and in particular, T cells require GATA-3 for execution of several developmental steps. Transcriptional activation of the Gata3 gene is observed throughout T-cell development and differentiation in a stage-specific fashion. GATA-3 has been described as a master regulator of T-helper 2 (Th2) cell differentiation in mature CD4(+) T cells. During T-cell development in the thymus, its roles in the CD4 versus CD8 lineage choice and at the β-selection checkpoint are the best characterized. In contrast, its importance prior to β-selection has been obscured both by the developmental heterogeneity of double negative (DN) 1 thymocytes and the paucity of early T-lineage progenitors (ETPs), a subpopulation of DN1 cells that contains the most immature thymic progenitors that retain potent T-lineage developmental potential. By examining multiple lines of in vivo evidence procured through the analysis of Gata3 mutant mice, we have recently demonstrated that GATA-3 is additionally required at the earliest stage of thymopoiesis for the development of the ETP population. Here, we review the characterized functions of GATA-3 at each stage of T-cell development and discuss hypothetical molecular pathways that mediate these functions.
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Affiliation(s)
- Tomonori Hosoya
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA
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43
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Abstract
Lymphopoiesis generates mature B, T, and NK lymphocytes from hematopoietic stem cells via a series of increasingly restricted developmental intermediates. The transcriptional networks that regulate these fate choices are composed of both common and lineage-specific components, which combine to create a cellular context that informs the developmental response to external signals. E proteins are an important factor during lymphopoiesis, and E2A in particular is required for normal T- and B-cell development. Although the other E proteins, HEB and E2-2, are expressed during lymphopoiesis and can compensate for some of E2A's activity, E2A proteins have non-redundant functions during early T-cell development and at multiple checkpoints throughout B lymphopoiesis. More recently, a role for E2A has been demonstrated in the generation of lymphoid-primed multipotent progenitors and shown to favor their specification toward lymphoid over myeloid lineages. This review summarizes both our current understanding of the wide-ranging functions of E proteins during the development of adaptive lymphocytes and the novel functions of E2A in orchestrating a lymphoid-biased cellular context in early multipotent progenitors.
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Affiliation(s)
- Renée F de Pooter
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
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44
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Abstract
T cells originate from hematopoietic stem cells (HSCs) in the bone marrow but complete their development in the thymus. HSCs give rise to a variety of non-renewing hematopoietic progenitors, among which a rare subset migrates to the thymus via the bloodstream. The earliest T-cell progenitors identified in the thymus are not T-lineage restricted but possess the ability to give rise to cells of many different lineages. Alternative lineage potentials are gradually lost as progenitors progress toward later developmental stages. Here, we review the early developmental events that might be involved in T-cell lineage fate determination, including the properties of possible thymus-settling progenitors, their homing into the thymus, and their T-cell lineage specification and commitment.
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Affiliation(s)
- Qi Yang
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, School of Medicine, Philadelphia, PA, USA
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45
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Cho GS, Choi SC, Park EC, Han JK. Role of Tbx2 in defining the territory of the pronephric nephron. Development 2011; 138:465-74. [PMID: 21205791 DOI: 10.1242/dev.061234] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Despite extensive study of the development of the nephron, which is the functional unit of the kidney, the molecular mechanisms underlying the determination of nephron size remain largely unknown. Using the Xenopus pronephros, we demonstrate here that Tbx2, a T-box transcriptional repressor, functions to demarcate the territory of the pronephric nephron. Tbx2 is specifically expressed around three distinct components of the pronephric nephron: the tubule, duct and glomus. Gain of function of Tbx2 inhibits nephric mesoderm formation. Conversely, Tbx2 loss of function expands the boundary of each component of the pronephric nephron, resulting in an enlarged pronephros. BMP signals induce Tbx2 in the non-nephric mesoderm, which inhibits the expression of the nephric markers Hey1 and Gremlin. Importantly, these pronephric molecules repress Tbx2 expression by antagonizing BMP signals in the nephric mesoderm. These results suggest that the negative regulatory loops between BMP/Tbx2 and Gremlin or Hey1 are responsible for defining the territory of the pronephric nephron.
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Affiliation(s)
- Gun-Sik Cho
- Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, Republic of Korea
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46
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Abstract
Hes1 is a direct Notch1 target; however, its precise function is unclear. In this issue of Immunity, Wendorff et al. (2010) report that Hes1 regulates the number of T cell progenitors and has important functions in both the induction and maintenance of T cell leukemia.
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Affiliation(s)
- Warren S Pear
- Department of Pathology and Laboratory Medicine and Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.
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47
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Wendorff AA, Koch U, Wunderlich FT, Wirth S, Dubey C, Brüning JC, MacDonald HR, Radtke F. Hes1 is a critical but context-dependent mediator of canonical Notch signaling in lymphocyte development and transformation. Immunity 2010; 33:671-84. [PMID: 21093323 DOI: 10.1016/j.immuni.2010.11.014] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 08/19/2010] [Accepted: 09/17/2010] [Indexed: 01/03/2023]
Abstract
Although canonical Notch signaling regulates multiple hematopoietic lineage decisions including T cell and marginal zone B cell fate specification, the downstream molecular mediators of Notch function are largely unknown. We showed here that conditional inactivation of Hes1, a well-characterized Notch target gene, in adult murine bone marrow (BM) cells severely impaired T cell development without affecting other Notch-dependent hematopoietic lineages such as marginal zone B cells. Competitive mixed BM chimeras, intrathymic transfer experiments, and in vitro culture of BM progenitors on Delta-like-expressing stromal cells further demonstrated that Hes1 is required for T cell lineage commitment, but dispensable for Notch-dependent thymocyte maturation through and beyond the beta selection checkpoint. Furthermore, our data strongly suggest that Hes1 is essential for the development and maintenance of Notch-induced T cell acute lymphoblastic leukemia. Collectively, our studies identify Hes1 as a critical but context-dependent mediator of canonical Notch signaling in the hematopoietic system.
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Affiliation(s)
- Agnieszka A Wendorff
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Swiss Institute for Experimental Cancer Research (ISREC), Station 19, 1015 Lausanne, Switzerland
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48
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Shapiro MJ, Shapiro VS. Transcriptional repressors, corepressors and chromatin modifying enzymes in T cell development. Cytokine 2010; 53:271-81. [PMID: 21163671 DOI: 10.1016/j.cyto.2010.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2010] [Revised: 11/12/2010] [Accepted: 11/18/2010] [Indexed: 01/13/2023]
Abstract
Gene expression is regulated by the combined action of transcriptional activators and transcriptional repressors. Transcriptional repressors function by recruiting corepressor complexes containing histone-modifying enzymes to specific sites within DNA. Chromatin modifying complexes are subsequently recruited, either directly by transcriptional repressors, or indirectly via corepressor complexes and/or histone modifications, to remodel chromatin into either a transcription-friendly 'open' form or an inhibitory 'closed' form. Transcriptional repressors, corepressors and chromatin modifying complexes play critical roles throughout T cell development. Here, we highlight those genes that function to repress transcription and that have been shown to be required for T cell development.
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49
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Liu H, Chi AW, Arnett KL, Chiang MY, Xu L, Shestova O, Wang H, Li YM, Bhandoola A, Aster JC, Blacklow SC, Pear WS. Notch dimerization is required for leukemogenesis and T-cell development. Genes Dev 2010; 24:2395-407. [PMID: 20935071 PMCID: PMC2964750 DOI: 10.1101/gad.1975210] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Accepted: 09/13/2010] [Indexed: 12/30/2022]
Abstract
Notch signaling regulates myriad cellular functions by activating transcription, yet how Notch selectively activates different transcriptional targets is poorly understood. The core Notch transcriptional activation complex can bind DNA as a monomer, but it can also dimerize on DNA-binding sites that are properly oriented and spaced. However, the significance of Notch dimerization is unknown. Here, we show that dimeric Notch transcriptional complexes are required for T-cell maturation and leukemic transformation but are dispensable for T-cell fate specification from a multipotential precursor. The varying requirements for Notch dimerization result from the differential sensitivity of specific Notch target genes. In particular, c-Myc and pre-T-cell antigen receptor α (Ptcra) are dimerization-dependent targets, whereas Hey1 and CD25 are not. These findings identify functionally important differences in the responsiveness among Notch target genes attributable to the formation of higher-order complexes. Consequently, it may be possible to develop a new class of Notch inhibitors that selectively block outcomes that depend on Notch dimerization (e.g., leukemogenesis).
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MESH Headings
- Animals
- Base Sequence
- Binding Sites
- Cell Line, Tumor
- Cell Proliferation
- Cells, Cultured
- Flow Cytometry
- Leukemia/genetics
- Leukemia/metabolism
- Leukemia/pathology
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Mice
- Mice, Inbred C57BL
- Models, Molecular
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/metabolism
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Protein Multimerization
- Protein Structure, Tertiary
- Proto-Oncogene Proteins c-myc/genetics
- Proto-Oncogene Proteins c-myc/metabolism
- Receptor, Notch1/chemistry
- Receptor, Notch1/genetics
- Receptor, Notch1/metabolism
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Homology, Nucleic Acid
- Signal Transduction/genetics
- Signal Transduction/physiology
- T-Lymphocytes/cytology
- T-Lymphocytes/metabolism
- Transcription, Genetic
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Affiliation(s)
- Hudan Liu
- Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Anthony W.S. Chi
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Kelly L. Arnett
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
| | - Mark Y. Chiang
- Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Hematology-Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Lanwei Xu
- Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Olga Shestova
- Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Hongfang Wang
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Yue-Ming Li
- Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA
| | - Avinash Bhandoola
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Jon C. Aster
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Stephen C. Blacklow
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
| | - Warren S. Pear
- Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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50
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Sultana DA, Bell JJ, Zlotoff DA, De Obaldia ME, Bhandoola A. Eliciting the T cell fate with Notch. Semin Immunol 2010; 22:254-60. [PMID: 20627765 DOI: 10.1016/j.smim.2010.04.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 04/23/2010] [Indexed: 10/19/2022]
Abstract
Multipotent progenitors arrive at the thymus via the blood. Constraining the non-T cell fates of these progenitors while promoting the T cell fate is a major task of the thymus. Notch appears to be the initial trigger for a developmental program that eventually results in T cell lineage commitment. Several downstream targets of Notch are known, but the specific roles of each are poorly understood. A greater understanding of how Notch and other thymic signals direct progenitors to a T cell fate could be useful for translational work. For example, such work could eventually allow for the generation of fully competent T cells in vitro that could supplement the waning T cell numbers and function in the elderly and boost T cell-mediated immunity in patients with immunodeficiency and after stem cell transplantation.
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Affiliation(s)
- Dil Afroz Sultana
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, School of Medicine, Philadelphia, PA 19104, USA
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