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Sim HJ, So HS, Poudel SB, Bhattarai G, Cho ES, Lee JC, Kook SH. Osteoblastic Wls Ablation Protects Mice from Total Body Irradiation-Induced Impairments in Hematopoiesis and Bone Marrow Microenvironment. Aging Dis 2022; 14:919-936. [PMID: 37191410 DOI: 10.14336/ad.2022.1026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 10/26/2022] [Indexed: 11/18/2022] Open
Abstract
Ionizing irradiation (IR) causes bone marrow (BM) injury, with senescence and impaired self-renewal of hematopoietic stem cells (HSCs), and inhibiting Wnt signaling could enhance hematopoietic regeneration and survival against IR stress. However, the underlying mechanisms by which a Wnt signaling blockade modulates IR-mediated damage of BM HSCs and mesenchymal stem cells (MSCs) are not yet completely understood. We investigated the effects of osteoblastic Wntless (Wls) depletion on total body irradiation (TBI, 5 Gy)-induced impairments in hematopoietic development, MSC function, and the BM microenvironment using conditional Wls knockout mutant mice (Col-Cre;Wlsfl/fl) and their littermate controls (Wlsfl/fl). Osteoblastic Wls ablation itself did not dysregulate BM frequency or hematopoietic development at a young age. Exposure to TBI at 4 weeks of age induced severe oxidative stress and senescence in the BM HSCs of Wlsfl/fl mice but not in those of the Col-Cre;Wlsfl/fl mice. TBI-exposed Wlsfl/fl mice exhibited greater impairments in hematopoietic development, colony formation, and long-term repopulation than TBI-exposed Col-Cre;Wlsfl/fl mice. Transplantation with BM HSCs or whole BM cells derived from the mutant, but not Wlsfl/fl mice, protected against HSC senescence and hematopoietic skewing toward myeloid cells and enhanced survival in recipients of lethal TBI (10 Gy). Unlike the Wlsfl/fl mice, the Col-Cre;Wlsfl/fl mice also showed radioprotection against TBI-mediated MSC senescence, bone mass loss, and delayed body growth. Our results indicate that osteoblastic Wls ablation renders BM-conserved stem cells resistant to TBI-mediated oxidative injuries. Overall, our findings show that inhibiting osteoblastic Wnt signaling promotes hematopoietic radioprotection and regeneration.
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Sun M, Chen Z, Wu X, Yu Y, Wang L, Lu A, Zhang G, Li F. The Roles of Sclerostin in Immune System and the Applications of Aptamers in Immune-Related Research. Front Immunol 2021; 12:602330. [PMID: 33717084 PMCID: PMC7946814 DOI: 10.3389/fimmu.2021.602330] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 01/14/2021] [Indexed: 12/19/2022] Open
Abstract
Wnt signaling is one of the fundamental pathways that play a major role in almost every aspect of biological systems. In addition to the well-known influence of Wnt signaling on bone formation, its essential role in the immune system also attracted increasing attention. Sclerostin, a confirmed Wnt antagonist, is also proven to modulate the development and differentiation of normal immune cells, particularly B cells. Aptamers, single-stranded (ss) oligonucleotides, are capable of specifically binding to a variety of target molecules by virtue of their unique three-dimensional structures. With in-depth study of those functional nucleic acids, they have been gradually applied to diagnostic and therapeutic area in immune diseases due to their various advantages over antibodies. In this review, we focus on several issues including the roles of Wnt signaling and Wnt antagonist sclerostin in the immune system. For the sake of understanding, current examples of aptamers applications for the immune diseases are also discussed. At the end of this review, we propose our ideas for the future research directions.
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Affiliation(s)
- Meiheng Sun
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Zihao Chen
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiaoqiu Wu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Yuanyuan Yu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Luyao Wang
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Aiping Lu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China.,Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, China.,Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China
| | - Ge Zhang
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China
| | - Fangfei Li
- Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinfomedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Precision Medicine and Innovative Drug Discovery, HKBU Institute for Research and Continuing Education, Shenzhen, China
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3
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Soliman DS, Al-Kuwari E, Siveen KS, Al-Abdulla R, Chandra P, Yassin M, Nashwan A, Hilmi FA, Taha RY, Nawaz Z, El-Omri H, Mateo JM, Al-Sabbagh A. Downregulation of Lymphoid enhancer-binding factor 1 (LEF-1) expression (by immunohistochemistry and/ flow cytometry) in chronic Lymphocytic Leukemia with atypical immunophenotypic and cytologic features. Int J Lab Hematol 2020; 43:515-525. [PMID: 33314668 DOI: 10.1111/ijlh.13420] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/17/2020] [Accepted: 11/10/2020] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Lymphoid enhancer-binding factor 1 (LEF-1) overexpression has been recently remarkably reported in chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) and has shown utility in distinguishing CLL/SLL from other B-cell lymphomas. CLL has a well-defined immunophenotype, yet, some cases of CLL demonstrate atypical morphology/ phenotype reflected by low Matutes score (atypical CLL). Till date, LEF1 expression has not been systematically studied in cases of CLL with atypical features. METHODS In this study, LEF-1 expression was assessed by two different techniques, (immunohistochemistry and flow cytometry), to investigate the expression profile of LEF-1 in cases of CLL/SLL, in comparison with other low-grade B-lymphomas and CLL with atypical features, including atypical immunophenotype and CLL with increased prolymphocytes or morphologically atypical cells. RESULTS We found that LEF-1 expression is downregulated in CLL with atypical immunophenotype/features compared to classic CLL; Chi-Square P < .0001. The ratio for LEF-1 expression in malignant B-cells/NK (by flow cytometry) in CLL/SLL with classic immunophenotype was higher than atypical CLL and is significantly higher in other small B-cell lymphomas (P < .01). Absence of LEF-1 expression in CLL/SLL is correlated (P < .05) with downregulation of CD5, CD23, CD200, expression of FMC7, brighter expression of CD79b, brighter expression of surface light chain, increased prolymphocytes and lower Matutes score. CONCLUSION As downregulation of LEF-1 expression is well correlated with atypical CLL, we suggest adding LEF-1 to Matutes score as a beneficial marker to differentiate classic from atypical CLL LEF-1 could also serve as a potential prognostic indicator for CLL clinical course.
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Affiliation(s)
- Dina S Soliman
- Department of Laboratory Medicine and Pathology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar.,Weill Cornell Medicine - Qatar, Doha, Qatar.,Department of Clinical Pathology, National Cancer Institute, Cairo, Egypt
| | - Einas Al-Kuwari
- Department of Laboratory Medicine and Pathology, Hamad Medical Corporation, Doha, Qatar
| | - Kodappully S Siveen
- Flow Cytometry Core Facility, interim Translational Research Institute, Hamad Medical Corporation, Doha, Qatar
| | - Rajaa Al-Abdulla
- Department of Laboratory Medicine and Pathology, Hamad Medical Corporation, Doha, Qatar
| | - Prem Chandra
- Medical Research Center, Academic Health Systems, Hamad Medical Corporation, Doha, Qatar
| | - Mohamed Yassin
- Department of Hematology and Medical Oncology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar
| | - Abdulqader Nashwan
- Nursing Department, Hazm Mebaireek General Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Feryal A Hilmi
- Department of Laboratory Medicine and Pathology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar
| | - Ruba Y Taha
- Department of Hematology and Medical Oncology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar
| | - Zafar Nawaz
- Department of Laboratory Medicine and Pathology, Hamad Medical Corporation, Doha, Qatar
| | - Halima El-Omri
- Department of Hematology and Medical Oncology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar
| | - Jericha M Mateo
- Flow Cytometry Core Facility, interim Translational Research Institute, Hamad Medical Corporation, Doha, Qatar
| | - Ahmad Al-Sabbagh
- Department of Laboratory Medicine and Pathology, National Center for Cancer Care and Research, Hamad Medical Corporation, Doha, Qatar
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4
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Damen MPF, van Rheenen J, Scheele CLGJ. Targeting dormant tumor cells to prevent cancer recurrence. FEBS J 2020; 288:6286-6303. [PMID: 33190412 DOI: 10.1111/febs.15626] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 11/03/2020] [Accepted: 11/11/2020] [Indexed: 12/14/2022]
Abstract
Over the years, developments in oncology led to significantly improved clinical outcome for cancer patients. However, cancer recurrence after initial treatment response still poses a major challenge, as it often involves more aggressive, metastatic disease. The presence of dormant cancer cells is associated with recurrence, metastasis, and poor clinical outcome, suggesting that these cells may play a crucial role in the process of disease relapse. Cancer cell dormancy typically presents as growth arrest while retaining proliferative capacity and can be induced or reversed by a wide array of cell-intrinsic and cell-extrinsic factors. Conventional therapies preferentially target fast-dividing cells, leaving dormant cancer cells largely insensitive to these treatments. In this review, we discuss the role of dormant cancer cells in cancer recurrence and highlight how novel therapy strategies based on cell-cycle modulation, modifications of existing drugs, or enhanced drug-delivery vehicles may be used to specifically target this subpopulation of tumor cells, and thereby have the potential to prevent disease recurrence.
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Affiliation(s)
- Maartje P F Damen
- Division of Molecular Pathology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jacco van Rheenen
- Division of Molecular Pathology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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5
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Wnt Signaling in the Regulation of Immune Cell and Cancer Therapeutics. Cells 2019; 8:cells8111380. [PMID: 31684152 PMCID: PMC6912555 DOI: 10.3390/cells8111380] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/21/2019] [Accepted: 11/01/2019] [Indexed: 12/17/2022] Open
Abstract
Wnt signaling is one of the important pathways to play a major role in various biological processes, such as embryonic stem-cell development, tissue regeneration, cell differentiation, and immune cell regulation. Recent studies suggest that Wnt signaling performs an essential function in immune cell modulation and counteracts various disorders. Nonetheless, the emerging role and mechanism of action of this signaling cascade in immune cell regulation, as well as its involvement in various cancers, remain debatable. The Wnt signaling in immune cells is very diverse, e.g., the tolerogenic role of dendritic cells, the development of natural killer cells, thymopoiesis of T cells, B-cell-driven initiation of T-cells, and macrophage actions in tissue repair, regeneration, and fibrosis. The purpose of this review is to highlight the current therapeutic targets in (and the prospects of) Wnt signaling, as well as the potential suitability of available modulators for the development of cancer immunotherapies. Although there are several Wnt inhibitors relevant to cancer, it would be worthwhile to extend this approach to immune cells.
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6
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Role of Wnt3a in the pathogenesis of cancer, current status and prospective. Mol Biol Rep 2019; 46:5609-5616. [PMID: 31236761 DOI: 10.1007/s11033-019-04895-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 05/24/2019] [Indexed: 12/18/2022]
Abstract
The Wnt signaling pathway plays a critical role in initiation, progression, invasion and metastasis of cancer. Wnt3a as a canonical Wnt ligand is strongly implicated in the etiology and pathology of a number of diseases including cancer. Depending on cancer type, Wnt3a enhances or suppresses metastasis, cell proliferation and apoptosis of cancer cells. This review summarizes the role of Wnt3a in the pathogenesis of different cancers including colorectal, prostate, hepatocellular, lung and leukemia, for promoting greater understanding and clinical management of these diseases.
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7
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Green AC, Rudolph-Stringer V, Chantry AD, Wu JY, Purton LE. Mesenchymal lineage cells and their importance in B lymphocyte niches. Bone 2019; 119:42-56. [PMID: 29183783 DOI: 10.1016/j.bone.2017.11.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 11/21/2017] [Accepted: 11/23/2017] [Indexed: 02/06/2023]
Abstract
Early B lymphopoiesis occurs in the bone marrow and is reliant on interactions with numerous cell types in the bone marrow microenvironment, particularly those of the mesenchymal lineage. Each cellular niche that supports the distinct stages of B lymphopoiesis is unique. Different cell types and signaling molecules are important for the progressive stages of B lymphocyte differentiation. Cells expressing CXCL12 and IL-7 have long been recognized as having essential roles in facilitating progression through stages of B lymphopoiesis. Recently, a number of other factors that extrinsically mediate B lymphopoiesis (positively or negatively) have been identified. In addition, the use of transgenic mouse models to delete specific genes in mesenchymal lineage cells has further contributed to our understanding of how B lymphopoiesis is regulated in the bone marrow. This review will cover the current understanding of B lymphocyte niches in the bone marrow and key extrinsic molecules and signaling pathways involved in these niches, with a focus on how mesenchymal lineage cells regulate B lymphopoiesis.
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Affiliation(s)
- Alanna C Green
- St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia; The University of Melbourne, Department of Medicine at St Vincent's Hospital, Fitzroy, Victoria, Australia; Sheffield Myeloma Research Team, Department of Oncology and Metabolism, The University of Sheffield, Sheffield, UK; The Mellanby Centre for Bone Research, Sheffield, UK.
| | - Victoria Rudolph-Stringer
- St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia; The University of Melbourne, Department of Medicine at St Vincent's Hospital, Fitzroy, Victoria, Australia
| | - Andrew D Chantry
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, The University of Sheffield, Sheffield, UK; The Mellanby Centre for Bone Research, Sheffield, UK
| | - Joy Y Wu
- Division of Endocrinology, Stanford University School of Medicine, Stanford, CA, USA.
| | - Louise E Purton
- St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia; The University of Melbourne, Department of Medicine at St Vincent's Hospital, Fitzroy, Victoria, Australia.
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8
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Ren D, Dai Y, Yang Q, Zhang X, Guo W, Ye L, Huang S, Chen X, Lai Y, Du H, Lin C, Peng X, Song L. Wnt5a induces and maintains prostate cancer cells dormancy in bone. J Exp Med 2018; 216:428-449. [PMID: 30593464 PMCID: PMC6363426 DOI: 10.1084/jem.20180661] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 10/31/2018] [Accepted: 11/28/2018] [Indexed: 12/16/2022] Open
Abstract
Wnt5a from osteoblastic niche induces and maintains the dormancy of prostate cancer cells in bone and inhibits bone metastasis in a preventive manner, uncovering a potential therapeutic utility of Wnt5a in the treatment of bone metastatic prostate cancer. In a substantial fraction of prostate cancer (PCa) patients, bone metastasis appears after years or even decades of latency. Canonical Wnt/β-catenin signaling has been proposed to be implicated in dormancy of cancer cells. However, how these tumor cells are kept dormant and recur under control of Wnt/β-catenin signaling derived from bone microenvironment remains unknown. Here, we report that Wnt5a from osteoblastic niche induces dormancy of PCa cells in a reversible manner in vitro and in vivo via inducing Siah E3 Ubiquitin Protein Ligase 2 (SIAH2) expression, which represses Wnt/β-catenin signaling. Furthermore, this effect of Wnt5a-induced dormancy of PCa cells depends on receptor tyrosine kinase-like orphan receptor 2 (ROR2), and a negative correlation of ROR2 expression with bone metastasis–free survival is observed in PCa patients. Therefore, these results demonstrate that Wnt5a/ROR2/SIAH2 signaling axis plays a crucial role in inducing and maintaining PCa cells dormancy in bone, suggesting a potential therapeutic utility of Wnt5a via inducing dormancy of PCa cells in bone.
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Affiliation(s)
- Dong Ren
- Department of Orthopedic Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Department of Experimental Research, State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Yuhu Dai
- Department of Orthopedic Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Qing Yang
- Department of Orthopedic Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Xin Zhang
- Department of Experimental Research, State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China.,Clinical Experimental Center, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-sen University, Jiangmen, China
| | - Wei Guo
- Department of Orthopedic Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Liping Ye
- Department of Experimental Research, State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Shuai Huang
- Department of Orthopedic Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Xu Chen
- Department of Urology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yingrong Lai
- Department of Pathology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Hong Du
- Department of Pathology, the First People's Hospital of Guangzhou City, Guangzhou, China
| | - Chuyong Lin
- Department of Experimental Research, State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xinsheng Peng
- Department of Orthopedic Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China .,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Libing Song
- Department of Experimental Research, State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China .,Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China
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9
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Monson MS, Van Goor AG, Ashwell CM, Persia ME, Rothschild MF, Schmidt CJ, Lamont SJ. Immunomodulatory effects of heat stress and lipopolysaccharide on the bursal transcriptome in two distinct chicken lines. BMC Genomics 2018; 19:643. [PMID: 30165812 PMCID: PMC6117931 DOI: 10.1186/s12864-018-5033-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 08/22/2018] [Indexed: 02/07/2023] Open
Abstract
Background Exposure to heat stress suppresses poultry immune responses, which can increase susceptibility to infectious diseases and, thereby, intensify the negative effects of heat on poultry welfare and performance. Identifying genes and pathways that are affected by high temperatures, especially heat-induced changes in immune responses, could provide targets to improve disease resistance in chickens. This study utilized RNA-sequencing (RNA-seq) to investigate transcriptome responses in the bursa of Fabricius, a primary immune tissue, after exposure to acute heat stress and/or subcutaneous immune stimulation with lipopolysaccharide (LPS) in a 2 × 2 factorial design: Thermoneutral + Saline, Heat + Saline, Thermoneutral + LPS and Heat + LPS. All treatments were investigated in two chicken lines: a relatively heat- and disease-resistant Fayoumi line and a more susceptible broiler line. Results Differential expression analysis determined that Heat + Saline had limited impact on gene expression (N = 1 or 63 genes) in broiler or Fayoumi bursa. However, Thermoneutral + LPS and Heat + LPS generated many expression changes in Fayoumi bursa (N = 368 and 804 genes). Thermoneutral + LPS was predicted to increase immune-related cell signaling and cell migration, while Heat + LPS would activate mortality-related functions and decrease expression in WNT signaling pathways. Further inter-treatment comparisons in the Fayoumi line revealed that heat stress prevented many of the expression changes caused by LPS. Although fewer significant expression changes were observed in the broiler bursa after exposure to Thermoneutral + LPS (N = 59 genes) or to Heat + LPS (N = 146 genes), both treatments were predicted to increase cell migration. Direct comparison between lines (broiler to Fayoumi) confirmed that each line had distinct responses to treatment. Conclusions Transcriptome analysis identified genes and pathways involved in bursal responses to heat stress and LPS and elucidated that these effects were greatest in the combined treatment. The interaction between heat and LPS was line dependent, with suppressive expression changes primarily in the Fayoumi line. Potential target genes, especially those involved in cell migration and immune signaling, can inform future research on heat stress in poultry and could prove useful for improving disease resistance. Electronic supplementary material The online version of this article (10.1186/s12864-018-5033-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Melissa S Monson
- Department of Animal Science, Iowa State University, Ames, IA, USA
| | | | | | - Michael E Persia
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Max F Rothschild
- Department of Animal Science, Iowa State University, Ames, IA, USA
| | - Carl J Schmidt
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, USA
| | - Susan J Lamont
- Department of Animal Science, Iowa State University, Ames, IA, USA.
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10
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Fan L, Shen H, Huang H, Yang R, Yao L. Impairment of Wnt/β-catenin signaling in blood cells of patients with severe cavitary pulmonary tuberculosis. PLoS One 2017; 12:e0172549. [PMID: 28333932 PMCID: PMC5363794 DOI: 10.1371/journal.pone.0172549] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 02/05/2017] [Indexed: 11/19/2022] Open
Abstract
Tuberculosis (TB) remains as a leading infectious disease worldwide. Our previous study showed interferon (IFN)-γ and CD3 T cell impairment in patients with severe cavitary pulmonary TB (PTB). However, the cause of the change in immune responses during the progression of TB is still poorly understood. In this study, eight newly diagnosed patients with severe cavitary and mild lesion non-cavity PTB were recruited, and three healthy volunteers were recruited as the control. RNA extracted from blood was tested by whole genome oligo microarrays. A PCR array was used to further test the same samples. Two additional groups of patients were recruited according to the same criteria with healthy control(HC) recruited as well and subjected to peripheral blood mononuclear cell isolation (PBMC)and analysis of TCF-7, β-catenin, cyclin D2, IFN-γ, and tumor necrosis factor (TNF)-α expression in CD14- cells (lymphocytes) and CD14+ cells by quantitative PCR. The changes of expression of β-catenin, CD69+ and IFN-γ by CD3+, CD14- and CD14+ cells in vitro with stimulation of LiCl were tested by flow cytometry. Whole genome oligo microarrays showed a significant decrease in expression of the Wnt signaling pathway in severe PTB patients. Further analysis of the Wnt pathway by PCR array indicated that TCF-7, β-catenin, and cyclin D2 expression was significantly reduced in severe PTB patients compared with mild PTB patients. In the additionally recruited patients, TCF-7, β-catenin, and cyclin D2 were expressed in both CD14+ and CD14- cells, while β-catenin was decreased significantly in CD14- cells compared with CD14+ cells in severe PTB patients, and IFN-γ and TNF-α expression in CD14- cells was also reduced significantly in severe PTB patients. β-catenin can directly trigger T cell activation and IFN-γsecretion in PBMCs stimulated for 24 hours. These findings indicate that Wnt pathway and its key genes, such as β-catenin, were impaired in blood cells of patients with severe PTB. Therefore, Wnt/β-catenin pathway is closely associated with T cell proliferation and TB lesion deterioration.
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Affiliation(s)
- Lin Fan
- Clinic and Research Center of Tuberculosis, Shanghai Key Lab of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
- * E-mail: (LF); (HS)
| | - Hongbo Shen
- Unit of Anti-tuberculosis Immunity, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
- * E-mail: (LF); (HS)
| | - Huichang Huang
- Unit of Anti-tuberculosis Immunity, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Rui Yang
- Unit of Anti-tuberculosis Immunity, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Lan Yao
- Clinic and Research Center of Tuberculosis, Shanghai Key Lab of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
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11
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Lyu X, Li J, Yun X, Huang R, Deng X, Wang Y, Chen Y, Xiao G. miR-181a-5p, an inducer of Wnt-signaling, facilitates cell proliferation in acute lymphoblastic leukemia. Oncol Rep 2017; 37:1469-1476. [DOI: 10.3892/or.2017.5425] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 08/22/2016] [Indexed: 11/06/2022] Open
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Abstract
During the past decade preclinical studies have defined many of the mechanisms used by tumours to hijack the skeleton and promote bone metastasis. This has led to the development and widespread clinical use of bone-targeted drugs to prevent skeletal-related events. This understanding has also identified a critical dependency between colonizing tumour cells and the cells of bone. This is particularly important when tumour cells first arrive in bone, adapt to their new microenvironment and enter a long-lived dormant state. In this Review, we discuss the role of different bone cell types in supporting disseminated tumour cell dormancy and reactivation, and highlight the new opportunities this provides for targeting the bone microenvironment to control dormancy and bone metastasis.
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Affiliation(s)
- Peter I Croucher
- Division of Bone Biology, Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia
- St Vincent's Clinical School, University of New South Wales Medicine, Sydney, New South Wales 2052, Australia
- School of Biotechnology and Biomolecular Sciences, University of New South Wales Australia, Sydney, New South Wales 2052, Australia
| | - Michelle M McDonald
- Division of Bone Biology, Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia
- St Vincent's Clinical School, University of New South Wales Medicine, Sydney, New South Wales 2052, Australia
| | - T John Martin
- St Vincent's Institute of Medical Research, 9 Princes Street, Fitzroy, Melbourne, Victoria 3065, Australia
- Department of Medicine, University of Melbourne, St Vincent's Hospital, Melbourne, Victoria 3065, Australia
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13
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Lawson MA, McDonald MM, Kovacic N, Hua Khoo W, Terry RL, Down J, Kaplan W, Paton-Hough J, Fellows C, Pettitt JA, Neil Dear T, Van Valckenborgh E, Baldock PA, Rogers MJ, Eaton CL, Vanderkerken K, Pettit AR, Quinn JMW, Zannettino ACW, Phan TG, Croucher PI. Osteoclasts control reactivation of dormant myeloma cells by remodelling the endosteal niche. Nat Commun 2015; 6:8983. [PMID: 26632274 PMCID: PMC4686867 DOI: 10.1038/ncomms9983] [Citation(s) in RCA: 258] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 10/23/2015] [Indexed: 12/25/2022] Open
Abstract
Multiple myeloma is largely incurable, despite development of therapies that target myeloma cell-intrinsic pathways. Disease relapse is thought to originate from dormant myeloma cells, localized in specialized niches, which resist therapy and repopulate the tumour. However, little is known about the niche, and how it exerts cell-extrinsic control over myeloma cell dormancy and reactivation. In this study, we track individual myeloma cells by intravital imaging as they colonize the endosteal niche, enter a dormant state and subsequently become activated to form colonies. We demonstrate that dormancy is a reversible state that is switched ‘on' by engagement with bone-lining cells or osteoblasts, and switched ‘off' by osteoclasts remodelling the endosteal niche. Dormant myeloma cells are resistant to chemotherapy that targets dividing cells. The demonstration that the endosteal niche is pivotal in controlling myeloma cell dormancy highlights the potential for targeting cell-extrinsic mechanisms to overcome cell-intrinsic drug resistance and prevent disease relapse. Therapy resistant dormant myeloma cells contribute to disease relapse. Here, the authors use intravital microscopy to track the location of these cells and demonstrate that they hone to the endosteal niche within the bone.
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Affiliation(s)
- Michelle A Lawson
- Department of Oncology, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK
| | - Michelle M McDonald
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Natasa Kovacic
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia
| | - Weng Hua Khoo
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,School of Biotechnology and Biomolecular Sciences, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Rachael L Terry
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Jenny Down
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia
| | - Warren Kaplan
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Julia Paton-Hough
- Department of Oncology, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK
| | - Clair Fellows
- Department of Oncology, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK
| | - Jessica A Pettitt
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia
| | - T Neil Dear
- South Australian Health and Medical Research Institute, Adelaide, South Australia 5000, Australia
| | - Els Van Valckenborgh
- Department of Hematology and Immunology, Vrije Universiteit Brussel, Brussels 1090, Belgium
| | - Paul A Baldock
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Michael J Rogers
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Colby L Eaton
- Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK.,Department of Human Metabolism and Clinical Biochemistry, University of Sheffield Medical School, University of Sheffield, Beech Hill Road, Sheffield, South Yorkshire S10 2RX, UK
| | - Karin Vanderkerken
- Department of Hematology and Immunology, Vrije Universiteit Brussel, Brussels 1090, Belgium
| | - Allison R Pettit
- Mater Research Institute, The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, Queensland 4102, Australia
| | - Julian M W Quinn
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia
| | - Andrew C W Zannettino
- South Australian Health and Medical Research Institute, Adelaide, South Australia 5000, Australia.,School of Medical Sciences, University of Adelaide, Frome Road, Adelaide, South Australia 5000, Australia
| | - Tri Giang Phan
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Peter I Croucher
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, New South Wales 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales 2010, Australia
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14
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Alvarez-Zavala M, Riveros-Magaña AR, García-Castro B, Barrera-Chairez E, Rubio-Jurado B, Garcés-Ruíz OM, Ramos-Solano M, Aguilar-Lemarroy A, Jave-Suarez LF. WNT receptors profile expression in mature blood cells and immature leukemic cells: RYK emerges as a hallmark receptor of acute leukemia. Eur J Haematol 2015; 97:155-65. [DOI: 10.1111/ejh.12698] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2015] [Indexed: 02/03/2023]
Affiliation(s)
- Monserrat Alvarez-Zavala
- División de Inmunología; Centro de Investigación Biomédica de Occidente (CIBO); Instituto Mexicano del Seguro Social (IMSS); Guadalajara Jalisco Mexico
- Programa de Doctorado en Ciencias Biomédicas; Centro Universitario de Ciencias de la Salud (CUCS); Universidad de Guadalajara; Guadalajara Jalisco Mexico
| | - Alma R. Riveros-Magaña
- División de Inmunología; Centro de Investigación Biomédica de Occidente (CIBO); Instituto Mexicano del Seguro Social (IMSS); Guadalajara Jalisco Mexico
- Programa de Doctorado en Investigación Clínica; CUCS; Universidad de Guadalajara; Guadalajara Jalisco Mexico
| | - Beatriz García-Castro
- División de Inmunología; Centro de Investigación Biomédica de Occidente (CIBO); Instituto Mexicano del Seguro Social (IMSS); Guadalajara Jalisco Mexico
- Tecnologico de Monterrey; Campus Sinaloa; Guadalajara Jalisco Mexico
| | | | - Benjamin Rubio-Jurado
- Servicio de Hematología UMAE; Hospital de Especialidades; Centro Médico Nacional de Occidente (CMNO)-IMSS; Guadalajara Jalisco Mexico
| | - Oscar M. Garcés-Ruíz
- Servicio de Hematología UMAE; Hospital de Especialidades; Centro Médico Nacional de Occidente (CMNO)-IMSS; Guadalajara Jalisco Mexico
| | - Moisés Ramos-Solano
- División de Inmunología; Centro de Investigación Biomédica de Occidente (CIBO); Instituto Mexicano del Seguro Social (IMSS); Guadalajara Jalisco Mexico
| | - Adriana Aguilar-Lemarroy
- División de Inmunología; Centro de Investigación Biomédica de Occidente (CIBO); Instituto Mexicano del Seguro Social (IMSS); Guadalajara Jalisco Mexico
| | - Luis F. Jave-Suarez
- División de Inmunología; Centro de Investigación Biomédica de Occidente (CIBO); Instituto Mexicano del Seguro Social (IMSS); Guadalajara Jalisco Mexico
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15
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He S, Lu Y, Liu X, Huang X, Keller ET, Qian CN, Zhang J. Wnt3a: functions and implications in cancer. CHINESE JOURNAL OF CANCER 2015; 34:554-62. [PMID: 26369691 PMCID: PMC4593336 DOI: 10.1186/s40880-015-0052-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 08/18/2015] [Indexed: 12/30/2022]
Abstract
Wnt3a, one of Wnt family members, plays key roles in regulating pleiotropic cellular functions, including self-renewal, proliferation, differentiation, and motility. Accumulating evidence has suggested that Wnt3a promotes or suppresses tumor progression via the canonical Wnt signaling pathway depending on cancer type. In addition, the roles of Wnt3a signaling can be inhibited by multiple proteins or chemicals. Herein, we summarize the latest findings on Wnt3a as an important therapeutic target in cancer.
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Affiliation(s)
- Sha He
- Key Laboratory of Longevity and Ageing-related Diseases, Ministry of Education, Nanning, Guangxi, 530021, P.R. China. .,Center for Translational Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Yi Lu
- Key Laboratory of Longevity and Ageing-related Diseases, Ministry of Education, Nanning, Guangxi, 530021, P.R. China. .,Center for Translational Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Xia Liu
- Key Laboratory of Longevity and Ageing-related Diseases, Ministry of Education, Nanning, Guangxi, 530021, P.R. China. .,Center for Translational Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Xin Huang
- Key Laboratory of Longevity and Ageing-related Diseases, Ministry of Education, Nanning, Guangxi, 530021, P.R. China. .,Center for Translational Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China.
| | - Evan T Keller
- Department of Urology and Pathology, School of Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Chao-Nan Qian
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, Guangdong, 51006, P.R. China.
| | - Jian Zhang
- Key Laboratory of Longevity and Ageing-related Diseases, Ministry of Education, Nanning, Guangxi, 530021, P.R. China. .,Center for Translational Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, P.R. China. .,Department of Urology and Pathology, School of Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
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16
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Cao J, Zhang L, Wan Y, Li H, Zhou R, Ding H, Liu Y, Yao Z, Guo X. Ablation of Wntless in endosteal niches impairs lymphopoiesis rather than HSCs maintenance. Eur J Immunol 2015; 45:2650-60. [PMID: 26173091 DOI: 10.1002/eji.201445405] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 04/29/2015] [Accepted: 07/07/2015] [Indexed: 01/06/2023]
Abstract
Osteoblasts and perivascular stromal cells constitute essential niches for HSC self-renewal and maintenance in the bone marrow. Wnt signaling is important to maintain HSC integrity. However, the paracrine role of Wnt proteins in osteoblasts-supported HSC maintenance and differentiation remains unclear. Here, we investigated hematopoiesis in mice with Wntless (Wls) deficiency in osteoblasts or Nestin-positive mesenchymal progenitor cells, which presumptively block Wnt secretion in osteoblasts. We detected defective B-cell lymphopoiesis and abnormal T-cell infiltration in the bone marrow of Wls mutant mice. Notably, no impact on HSC frequency and repopulation in the bone marrow was observed with the loss of osteoblastic Wls. Our findings revealed a supportive role of Wnts in osteoblasts-regulated B-cell lymphopoiesis. They also suggest a preferential niche role of osteoblastic Wnts for lymphoid cells rather than HSCs, providing new clues for the molecular nature of distinct niches occupied by different hematopoietic cells.
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Affiliation(s)
- Jingjing Cao
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Lingling Zhang
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Yong Wan
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Hanjun Li
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Rujiang Zhou
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Heyuan Ding
- The Fifth People's Hospital of Shanghai, Fudan University, China
| | | | - Zhengju Yao
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Xizhi Guo
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
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17
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Li S, Li T, Chen Y, Nie Y, Li C, Liu L, Li Q, Qiu L. Granulocyte Colony-Stimulating Factor Induces Osteoblast Inhibition by B Lymphocytes and Osteoclast Activation by T Lymphocytes during Hematopoietic Stem/Progenitor Cell Mobilization. Biol Blood Marrow Transplant 2015; 21:1384-91. [PMID: 25985917 DOI: 10.1016/j.bbmt.2015.05.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 05/04/2015] [Indexed: 12/18/2022]
Abstract
In the bone marrow (BM), hematopoietic stem and progenitor cells (HSPCs) reside in specialized niches near osteoblast cells at the endosteum. HSPCs that egress to peripheral blood are widely used for transplant, and mobilization is most commonly performed with recombinant human granulocyte colony-stimulating factor (G-CSF). However, the cellular targets of G-CSF that initiate the mobilization cascade and bone remodeling are not completely understood. Here, we examined whether T and B lymphocytes modulate the bone niche and influence HSPC mobilization. We used T and B defective mice to show that G-CSF-induced mobilization of HSPCs correlated with B lymphocytes but poorly with T lymphocytes. In addition, we found that defective B lymphocytes prevent G-CSF-mediated osteoblast disruption, and further study showed BM osteoblasts were reduced coincident with mobilization, induced by elevated expression of dickkopf1 of BM B lymphocytes. BM T cells were also involved in G-CSF-induced osteoclast activation by regulating the Receptor Activator of Nuclear Factor-κ B Ligand/Osteoprotegerin (RANKL/OPG) axis. These data provide evidence that BM B and T lymphocytes play a role in G-CSF-induced HSPC mobilization by regulating bone remodeling.
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Affiliation(s)
- Sidan Li
- Beijing Key Laboratory of Pediatric Hematology Oncology; National Key Discipline of Pediatrics, Ministry of Education; Key Laboratory of Major Diseases in Children, Ministry of Education; Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing, China; State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
| | - Tianshou Li
- Department of Hematology, The First Affiliated Hospital of Guangxi Medical University, Guangxi, China
| | - Yongbing Chen
- Department of Hepatobiliary Surgery, General Hospital of Beijing Military Area Command, Beijing, China
| | - Yinchao Nie
- Department of Hematology, The First Affiliated Hospital of Guangxi Medical University, Guangxi, China
| | - Changhong Li
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
| | - Lanting Liu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
| | - Qiaochuan Li
- Department of Hematology, The First Affiliated Hospital of Guangxi Medical University, Guangxi, China.
| | - Lugui Qiu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
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18
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Guo X, Zhang R, Liu J, Li M, Song C, Dovat S, Li J, Ge Z. Characterization of LEF1 High Expression and Novel Mutations in Adult Acute Lymphoblastic Leukemia. PLoS One 2015; 10:e0125429. [PMID: 25942645 PMCID: PMC4420493 DOI: 10.1371/journal.pone.0125429] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 03/23/2015] [Indexed: 01/12/2023] Open
Abstract
Aberrant activation of the Wnt pathway plays a pathogenetic role in tumors and has been associated with adverse outcome in acute lymphoblastic leukemia (ALL). Lymphoid enhancer binding factor 1 (LEF1), a key mediator of Wnt signaling, has been linked to leukemic transformation, and LEF1 mutations have been identified in T-ALL. Here we found LEF1 is highly expressed in 25.0% adult ALL patients and LEF1 high expression was associated with high-risk leukemia factors (high WBC, Philadelphia chromosome positive, complex karyotype), shorter event-free survival (EFS), and high relapse rates in patients with B-ALL. LEF1 high expression is also associated with high mutation rate of Notch1 and JAK1 in T-ALL. We identified 2 novel LEF1 mutations (K86E and P106L) in 4 of 131 patients with ALL, and those patients with high-risk ALL (high WBC, complex karyotype). These results suggest a role for LEF1 mutations in leukemogenesis. We further explored the effect of the mutations on cell proliferation and found both mutations significantly promoted the proliferation of ALL cells. We also observed the effect of LEF1 and its mutations on the transcription of its targets, c-MYC and Cyclin D1. We found LEF1 increased the promoter activity of its targets c-MYC and Cyclin D1, and LEF1 K86E and P106L mutants further significantly enhanced this effect. We also observed that the c-MYC and Cyclin D1 mRNA levels were significantly increased in patients with LEF1 high expression compared with those with low expression. Taken together, our findings indicate high LEF1 expression and mutation are associated with high-risk leukemia and our results also revealed that LEF1 high expression and/or gain-of-function mutations are involved in leukemogenesis of ALL.
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Affiliation(s)
- Xing Guo
- The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Department of Hematology, Nanjing, 210029, China
| | - Run Zhang
- The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Department of Hematology, Nanjing, 210029, China
| | - Juan Liu
- The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Department of Hematology, Nanjing, 210029, China
| | - Min Li
- The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Department of Hematology, Nanjing, 210029, China
| | - Chunhua Song
- Pennsylvania State University Medical College, Department of Pediatrics, Hershey, 17033, PA, United States of America
| | - Sinisa Dovat
- Pennsylvania State University Medical College, Department of Pediatrics, Hershey, 17033, PA, United States of America
| | - Jianyong Li
- The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Department of Hematology, Nanjing, 210029, China
| | - Zheng Ge
- The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Department of Hematology, Nanjing, 210029, China
- Pennsylvania State University Medical College, Department of Pediatrics, Hershey, 17033, PA, United States of America
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19
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Abstract
Colorectal cancer is a serious health problem, a challenge for research, and a model for studying the molecular mechanisms involved in its development. According to its incidence, this pathology manifests itself in three forms: family, hereditary, and most commonly sporadic, apparently not associated with any hereditary or familial factor. For the types having inheritance patterns and a family predisposition, the tumours develop through defined stages ranging from adenomatous lesions to the manifestation of a malignant tumour. It has been established that environmental and hereditary factors contribute to the development of colorectal cancer, as indicated by the accumulation of mutations in oncogenes, genes which suppress and repair DNA, signaling the existence of various pathways through which the appearance of tumours may occur. In the case of the suppressive and mutating tracks, these are characterised by genetic disorders related to the phenotypical changes of the morphological progression sequence in the adenoma/carcinoma. Moreover, alternate pathways through mutation in BRAF and KRAS genes are associated with the progression of polyps to cancer. This review surveys the research done at the cellular and molecular level aimed at finding specific alternative therapeutic targets for fighting colorectal cancer.
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Affiliation(s)
- Francisco Arvelo
- Centre for Biosciences, Institute for Advanced Studies Foundation-IDEA, Caracas 1015-A, Apartado 17606, Venezuela ; Laboratory for Tissue Culture and Tumour Biology, Institute of Experimental Biology, Central University of Venezuela, Apartado 47114, Caracas, Venezuela
| | - Felipe Sojo
- Centre for Biosciences, Institute for Advanced Studies Foundation-IDEA, Caracas 1015-A, Apartado 17606, Venezuela ; Laboratory for Tissue Culture and Tumour Biology, Institute of Experimental Biology, Central University of Venezuela, Apartado 47114, Caracas, Venezuela
| | - Carlos Cotte
- Laboratory for Tissue Culture and Tumour Biology, Institute of Experimental Biology, Central University of Venezuela, Apartado 47114, Caracas, Venezuela
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20
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Novo MCT, Osugui L, dos Reis VO, Longo-Maugéri IM, Mariano M, Popi AF. Blockage of Wnt/β-catenin signaling by quercetin reduces survival and proliferation of B-1 cells in vitro. Immunobiology 2015; 220:60-7. [DOI: 10.1016/j.imbio.2014.09.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 08/26/2014] [Accepted: 09/01/2014] [Indexed: 12/20/2022]
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21
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Roozen PPC, Brugman MH, Staal FJT. Differential requirements for Wnt and Notch signaling in hematopoietic versus thymic niches. Ann N Y Acad Sci 2012; 1266:78-93. [PMID: 22901260 DOI: 10.1111/j.1749-6632.2012.06626.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
All blood cells are derived from multipotent stem cells, the so-called hematopoietic stem cells (HSCs), that in adults reside in the bone marrow. Most types of blood cells also develop there, with the notable exception of T lymphocytes that develop in the thymus. For both HSCs and developing T cells, interactions with the surrounding microenvironment are critical in regulating maintenance, differentiation, apoptosis, and proliferation. Such specialized regulatory microenvironments are referred to as niches and provide both soluble factors as well as cell-cell interactions between niche component cells and blood cells. Two pathways that are critical for early T cell development in the thymic niche are Wnt and Notch signaling. These signals also play important but controversial roles in the HSC niche. Here, we review the differences and similarities between the thymic and hematopoietic niches, with particular focus on Wnt and Notch signals, as well as the latest insights into regulation of these developmentally important pathways.
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Affiliation(s)
- Paul P C Roozen
- Department of Immunohematology and Blood Transfusion (IHB), Leiden University Medical Center, Leiden, the Netherlands
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22
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Seke Etet PF, Vecchio L, Nwabo Kamdje AH. Interactions between bone marrow stromal microenvironment and B-chronic lymphocytic leukemia cells: Any role for Notch, Wnt and Hh signaling pathways? Cell Signal 2012; 24:1433-43. [DOI: 10.1016/j.cellsig.2012.03.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 03/05/2012] [Indexed: 01/02/2023]
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23
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Transcriptional silencing of the Wnt-antagonist DKK1 by promoter methylation is associated with enhanced Wnt signaling in advanced multiple myeloma. PLoS One 2012; 7:e30359. [PMID: 22363428 PMCID: PMC3281831 DOI: 10.1371/journal.pone.0030359] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Accepted: 12/14/2011] [Indexed: 01/23/2023] Open
Abstract
The Wnt/β-catenin pathway plays a crucial role in the pathogenesis of various human cancers. In multiple myeloma (MM), aberrant auto-and/or paracrine activation of canonical Wnt signaling promotes proliferation and dissemination, while overexpression of the Wnt inhibitor Dickkopf1 (DKK1) by MM cells contributes to osteolytic bone disease by inhibiting osteoblast differentiation. Since DKK1 itself is a target of TCF/β-catenin mediated transcription, these findings suggest that DKK1 is part of a negative feedback loop in MM and may act as a tumor suppressor. In line with this hypothesis, we show here that DKK1 expression is low or undetectable in a subset of patients with advanced MM as well as in MM cell lines. This absence of DKK1 is correlated with enhanced Wnt pathway activation, evidenced by nuclear accumulation of β-catenin, which in turn can be antagonized by restoring DKK1 expression. Analysis of the DKK1 promoter revealed CpG island methylation in several MM cell lines as well as in MM cells from patients with advanced MM. Moreover, demethylation of the DKK1 promoter restores DKK1 expression, which results in inhibition of β-catenin/TCF-mediated gene transcription in MM lines. Taken together, our data identify aberrant methylation of the DKK1 promoter as a cause of DKK1 silencing in advanced stage MM, which may play an important role in the progression of MM by unleashing Wnt signaling.
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24
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Wnt signaling strength regulates normal hematopoiesis and its deregulation is involved in leukemia development. Leukemia 2011; 26:414-21. [PMID: 22173215 DOI: 10.1038/leu.2011.387] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A strict balance between self-renewal and differentiation of hematopoietic stem cells (HSCs) is required in order to maintain homeostasis, as well as to efficiently respond to injury and infections. Numbers and fate decisions made by progenitors derived from HSC must also be carefully regulated to sustain large-scale production of blood cells. The complex Wnt family of molecules generally is thought to be important to these processes, delivering critical signals to HSC and progenitors as they reside in specialized niches. Wnt proteins have also been extensively studied in connection with malignancies and are causatively involved in the development of several types of leukemias. However, studies with experimental animal models have produced contradictory findings regarding the importance of Wnt signals for normal hematopoiesis and lymphopoiesis. Here, we will argue that dose dependency of signaling via particular Wnt pathways accounts for much, if not all of this controversy. We conclude that there seems little doubt that Wnt proteins are required to sustain normal hematopoiesis, but are likely to be presented in carefully controlled gradients in a tissue-specific manner.
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25
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Sohlbach K, Moll R, Goßmann J, Nowak O, Barth P, Neubauer A, Huynh MQ. β-Catenin signaling: no relevance in Hodgkin lymphoma? Leuk Lymphoma 2011; 53:996-8. [PMID: 22023520 DOI: 10.3109/10428194.2011.634046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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26
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Abstract
Considerable information has accumulated about components of BM that regulate the survival, self-renewal, and differentiation of hematopoietic cells. In the present study, we investigated Wnt signaling and assessed its influence on human and murine hematopoiesis. Hematopoietic stem/progenitor cells (HSPCs) were placed on Wnt3a-transduced OP9 stromal cells. The proliferation and production of B cells, natural killer cells, and plasmacytoid dendritic cells were blocked. In addition, some HSPC characteristics were maintained or re-acquired along with different lineage generation potentials. These responses did not result from direct effects of Wnt3a on HSPCs, but also required alterations in the OP9 cells. Microarray, PCR, and flow cytometric experiments revealed that OP9 cells acquired osteoblastic characteristics while down-regulating some features associated with mesenchymal stem cells, including the expression of angiopoietin 1, the c-Kit ligand, and VCAM-1. In contrast, the production of decorin, tenascins, and fibromodulin markedly increased. We found that at least 1 of these extracellular matrix components, decorin, is a regulator of hematopoiesis: upon addition of this proteoglycan to OP9 cocultures, decorin caused changes similar to those caused by Wnt3a. Furthermore, hematopoietic stem cell numbers in the BM and spleen were elevated in decorin-knockout mice. These findings define one mechanism through which canonical Wnt signaling could shape niches supportive of hematopoiesis.
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Nuclear overexpression of lymphoid-enhancer-binding factor 1 identifies chronic lymphocytic leukemia/small lymphocytic lymphoma in small B-cell lymphomas. Mod Pathol 2011; 24:1433-43. [PMID: 21685909 DOI: 10.1038/modpathol.2011.103] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Lymphoid-enhancer-binding factor 1 (LEF1), coupling with β-catenin, functions as a key nuclear mediator of WNT/β-catenin signaling, which regulates cell proliferation and survival. LEF1 has an important role in lymphopoiesis, and is normally expressed in T and pro-B cells but not mature B cells. However, gene expression profiling demonstrates overexpression of LEF1 in chronic lymphocytic leukemia, and knockdown of LEF1 decreases the survival of the leukemic cells. So far, the data on LEF1 expression in B-cell lymphomas are limited. This study represents the first attempt to assess LEF1 by immunohistochemistry in a large series (290 cases) of B-cell lymphomas. Strong nuclear staining of LEF1 was observed in virtually all neoplastic cells in 92 of 92 (100%) chronic lymphocytic leukemia/small lymphocytic lymphomas including two CD5- cases, with strongest staining in cells with Richter's transformation. LEF1 also highlighted the morphologically inconspicuous small lymphocytic lymphoma component in three composite lymphomas. All 53 mantle cell lymphomas, 31 low-grade follicular lymphomas and 31 marginal zone lymphomas, including 3 CD5+ cases, were negative. In 12 grade 3 follicular lymphomas, LEF1 was positive in a small subset (5-15%) of cells. Diffuse large B-cell lymphoma, however, demonstrated significant variability in LEF1 expression with overall positivity in 27 of 71 (38%) cases. Our results demonstrate that nuclear overexpression of LEF1 is highly associated with chronic lymphocytic leukemia/small lymphocytic lymphoma, and may serve as a convenient marker for differential diagnosis of small B-cell lymphomas. The expression of β-catenin, the coactivator of LEF1 in WNT signaling, was examined in 50 chronic lymphocytic leukemia/small lymphocytic lymphomas, of which 44 (88%) showed negative nuclear staining. The findings of universal nuclear overexpression of LEF1 but lack of nuclear β-catenin in the majority of chronic lymphocytic leukemia/small lymphocytic lymphoma suggest that the pro-survival function of LEF1 in this disease may be independent of WNT/β-catenin signaling.
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Barna G, Mihalik R, Timár B, Tömböl J, Csende Z, Sebestyén A, Bödör C, Csernus B, Reiniger L, Peták I, Matolcsy A. ROR1 expression is not a unique marker of CLL. Hematol Oncol 2011; 29:17-21. [DOI: 10.1002/hon.948] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Callihan P, Mumaw J, Machacek DW, Stice SL, Hooks SB. Regulation of stem cell pluripotency and differentiation by G protein coupled receptors. Pharmacol Ther 2010; 129:290-306. [PMID: 21073897 DOI: 10.1016/j.pharmthera.2010.10.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 10/08/2010] [Indexed: 01/25/2023]
Abstract
Stem cell-based therapeutics have the potential to effectively treat many terminal and debilitating human diseases, but the mechanisms by which their growth and differentiation are regulated are incompletely defined. Recent data from multiple systems suggest major roles for G protein coupled receptor (GPCR) pathways in regulating stem cell function in vivo and in vitro. The goal of this review is to illustrate common ground between the growing field of stem cell therapeutics and the long-established field of G protein coupled receptor signaling. Herein, we briefly introduce basic stem cell biology and discuss how several conserved pathways regulate pluripotency and differentiation in mouse and human stem cells. We further discuss general mechanisms by which GPCR signaling may impact these pluripotency and differentiation pathways, and summarize specific examples of receptors from each of the major GPCR subfamilies that have been shown to regulate stem cell function. Finally, we discuss possible therapeutic implications of GPCR regulation of stem cell function.
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Affiliation(s)
- Phillip Callihan
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA, United States
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Rosales-Reynoso MA, Ochoa-Hernández AB, Aguilar-Lemarroy A, Jave-Suárez LF, Troyo-Sanromán R, Barros-Núñez P. Gene expression profiling identifies WNT7A as a possible candidate gene for decreased cancer risk in fragile X syndrome patients. Arch Med Res 2010; 41:110-118.e2. [PMID: 20470940 DOI: 10.1016/j.arcmed.2010.03.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2009] [Accepted: 01/25/2010] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND AIMS Although sporadic cases of cancer in patients with fragile X syndrome (FXS) have been reported, extensive studies carried out in Denmark and Finland concluded that cancer incidence in these patients is lower than in the general population. On the other hand, the FMR1 protein, which is involved in the translation process, is absent in FXS patients. Hence, it is reasonable to assume that these patients exhibit an abnormal expression of some proteins involved in regulating tumor suppressor genes and/or oncogenes, thus explaining its decreased cancer frequency. We undertook this study to analyze the expression of oncogenes and tumor suppressor genes in fragile X syndrome patients. METHODS Molecular analysis of the FMR1 gene was achieved in 10 male patients and controls. Total RNA from peripheral blood was used to evaluate expression of oncogenes and tumor suppressor genes included in a 10,000 gene microarray library. Quantitative real-time PCR was utilized to confirm genes with differential expression. RESULTS Among 27 genes showing increased expression in FXS patients, only eight genes exhibited upregulation in at least 50% of them. Among these, ARMCX2 and PPP2R5C genes are tumor suppressor related. Likewise, 23/65 genes showed decreased expression in >50% of patients. Among them, WNT7A gene is a ligand of the beta-catenin pathway, which is widely related to oncogenic processes. Decreased expression of WNT7A was confirmed by quantitative RT-PCR. Expression of c-Myc, c-Jun, cyclin-D and PPARdelta genes, as target of the beta-catenin pathway, was moderately reduced in FXS patients. CONCLUSIONS Results suggest that this diminished expression of the WNT7A gene may be related to a supposed protection of FXS patients to develop cancer.
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Affiliation(s)
- Mónica Alejandra Rosales-Reynoso
- División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, México.
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Small molecule inhibitors of Wnt/beta-catenin/lef-1 signaling induces apoptosis in chronic lymphocytic leukemia cells in vitro and in vivo. Neoplasia 2010; 12:326-35. [PMID: 20360943 DOI: 10.1593/neo.91972] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Revised: 01/28/2010] [Accepted: 02/02/2010] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Lymphoid enhancer factor-1 (lef-1) is overexpressed in B-cell chronic lymphocytic leukemia (CLL) when compared with normal B cells and transcribes several genes implicated in the pathogenesis of CLL. We therefore hypothesize that antagonism of lef-1 might lead to killing of CLL cells. We used two small molecule inhibitors of Wnt/beta-catenin/lef-1 signaling (CGP049090 and PKF115-584) to test our hypothesis. DESIGN AND METHODS Enriched CLL cells and healthy B cells were used in this study. Small interfering RNA (siRNA)-mediated knockdown of lef-1 in primary CLL cells was done using nucleofection, and 50% lethal concentration (LC(50)) of two small molecules was assessed using ATP-based cell viability assay. Apoptotic response was investigated in time course experiments with different apoptotic markers. Specificity of the small molecules was demonstrated by coimmunoprecipitation experiments for the lef-1/beta-catenin interaction. In vivo studies were done in JVM-3 subcutaneous xenograft model. RESULTS Inhibition of lef-1 by siRNA leads to increased apoptosis of CLL cells and inhibited proliferation of JVM-3 cell lines. The two small molecule inhibitors (CGP049090 and PKF115-584) efficiently kill CLL cells (LC(50)<1 microM), whereas normal B cells were not significantly affected. Coimmunoprecipitation showed a selective disruption of beta-catenin/lef-1 interaction. In vivo studies exhibited tumor inhibition of 69% with CGP049090 and 57% with PKF115-584 when compared with vehicle-treated controls, and the intervention was well tolerated. CONCLUSIONS We have demonstrated that targeting lef-1 is a new and selective therapeutic approach in CLL. CGP049090 or PKF115-584 may be attractive compounds for CLL and other malignancies that deserve further (pre)clinical evaluation.
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Bennett LB, Taylor KH, Arthur GL, Rahmatpanah FB, Hooshmand SI, Caldwell CW. Epigenetic regulation of WNT signaling in chronic lymphocytic leukemia. Epigenomics 2010; 2:53-70. [PMID: 20473358 PMCID: PMC2869094 DOI: 10.2217/epi.09.43] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Certain WNT and WNT network target genes are expressed at higher or lower levels in chronic lymphocytic leukemia compared with normal B-cells. This includes upregulation of nuclear complex genes, as well as genes for cytoplasmic proteins and WNT ligands and their cognate receptors. In addition, epigenetic silencing of several negative regulators of the WNT pathway have been identified. The balance between epigenetic downregulation of negative effector genes and increased expression of positive effector genes demonstrate that the epigenetic downregulation of WNT antagonists is one mechanism, perhaps the main mechanism, that is permissive to active WNT signaling in chronic lymphocytic leukemia. Moreover, constitutive activation of the WNT network and target genes is likely to impact on additional interacting signaling pathways. Based on published studies, we propose a model of WNT signaling that involves mainly permissive expression, and sometimes overexpression, of positive effectors and downregulation of negative regulators in the network. In this model, DNA methylation, histone modifications and altered expression of microRNA molecules interact to allow continuous WNT signaling.
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Affiliation(s)
| | | | | | | | | | - Charles W Caldwell
- Author for correspondence: Department of Pathology & Anatomical Sciences, Ellis Fischel Cancer Center, University of Missouri, 115 Business Loop I-70 West, Columbia, MO 65203, USA, Tel.: +1 573 882 1234, Fax: +1 573 884 5206,
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Memarian A, Hojjat-Farsangi M, Asgarian-Omran H, Younesi V, Jeddi-Tehrani M, Sharifian RA, Khoshnoodi J, Razavi SM, Rabbani H, Shokri F. Variation in WNT genes expression in different subtypes of chronic lymphocytic leukemia. Leuk Lymphoma 2009; 50:2061-70. [DOI: 10.3109/10428190903331082] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ali Memarian
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hojjat-Farsangi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Department of Immunology, School of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Hossein Asgarian-Omran
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Vahid Younesi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Immune and Gene Therapy Lab, Cancer Center Karolinska, Karolinska Hospital, Stockholm, Sweden
- Monoclonal Antibody Research Center, Avicenna Research Institute, Tehran, Iran
| | - Ramazan Ali Sharifian
- Clinic of Hematology and Oncology, Vali-Asr Hospital, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Jalal Khoshnoodi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Mohsen Razavi
- Clinic of Hematology and Oncology, Firozgar Hospital, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Hodjatallah Rabbani
- Immune and Gene Therapy Lab, Cancer Center Karolinska, Karolinska Hospital, Stockholm, Sweden
- Monoclonal Antibody Research Center, Avicenna Research Institute, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
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Nteliopoulos G, Marley SB, Gordon MY. Influence of PI-3K/Akt pathway on Wnt signalling in regulating myeloid progenitor cell proliferation. Evidence for a role of autocrine/paracrine Wnt regulation. Br J Haematol 2009; 146:637-51. [DOI: 10.1111/j.1365-2141.2009.07823.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Gavriatopoulou M, Dimopoulos MA, Christoulas D, Migkou M, Iakovaki M, Gkotzamanidou M, Terpos E. Dickkopf-1: a suitable target for the management of myeloma bone disease. Expert Opin Ther Targets 2009; 13:839-48. [PMID: 19530987 DOI: 10.1517/14728220903025770] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bone disease remains a major problem in the management of patients with multiple myeloma (MM) and is characterized by the presence of lytic lesions due to increased osteoclastic activity and reduced osteoblast function. Wingless-type and integrase 1 (Wnt)/beta-catenin signaling is a central pathway for bone development and homeostasis. Dickkopf-1 (Dkk-1) is a soluble inhibitor of Wnt, which disrupts osteoblast differentiation and action. Dkk-1 is produced by myeloma cells and overexpressed in myeloma microenvironment of patients with extensive bone disease. In addition to its direct inhibitory effect of Dkk-1 on osteoblasts, Dkk-1 disrupts the Wnt3a-regulated osteoprotegerin and receptor activator of NF-kappaB ligand (RANKL) expression in osteoblasts and thus it indirectly enhances osteoclast function in MM. Dkk-1 serum and bone marrow plasma levels are increased in MM patients and correlated with advanced International Staging System stage and presence of osteolytic lesions. Preclinical studies in mouse myeloma models showed that targeting Dkk-1 with neutralizing anti-Dkk-1 antibodies resulted in increased numbers of osteoblasts, reduced numbers of multinucleated osteoclasts and increased bone volume. The bone anabolic effect of anti-Dkk-1 may also be associated with reduced myeloma burden. These data show that Dkk-1 has a pivotal role in bone health and disease and is a novel target for the management of myeloma patients with lytic bone disease.
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Affiliation(s)
- Maria Gavriatopoulou
- University of Athens School of Medicine, "Alexandra" University Hospital, Department of Clinical Therapeutics, 5 Marathonomahon street, Drossia 145-72, Athens, Greece.
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Malhotra S, Kincade PW. Wnt-related molecules and signaling pathway equilibrium in hematopoiesis. Cell Stem Cell 2009; 4:27-36. [PMID: 19128790 DOI: 10.1016/j.stem.2008.12.004] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
There is near consensus that Wnt family molecules establish important gradients within niches where hematopoietic stem cells (HSC) reside. We review recent papers suggesting that a delicate balance is required between competing Wnt ligands and corresponding signaling pathways to maintain HSC integrity. Some steps in the transitions from HSC to lymphoid progenitor seem to be partially reversible and under the influence of Wnts. In addition, it has been recently suggested that HSC can oscillate between dormant versus active or lineage-biased states. We speculate that Wnts control a reflux process that may sustain stem cell self-renewal and differentiation potential.
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Affiliation(s)
- Sachin Malhotra
- Immunobiology and Cancer Program, Oklahoma Medical Research Foundation, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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Yokota T, Oritani K, Garrett KP, Kouro T, Nishida M, Takahashi I, Ichii M, Satoh Y, Kincade PW, Kanakura Y. Soluble frizzled-related protein 1 is estrogen inducible in bone marrow stromal cells and suppresses the earliest events in lymphopoiesis. THE JOURNAL OF IMMUNOLOGY 2009; 181:6061-72. [PMID: 18941195 DOI: 10.4049/jimmunol.181.9.6061] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
It has long been known that lymphopoiesis is transiently suppressed during pregnancy, which can be experimentally simulated by estrogen treatment. We now confirm with Rag1/GFP reporter mice that early lymphoid progenitors in the lineage marker(-) c-kit(high) ScaI(+), hematopoietic stem cell-enriched fraction of bone marrow are particularly depressed in these circumstances. Hematopoietic and environmental cells are both potential hormone targets and, because of this complexity, very little is known regarding mechanisms. We have now identified soluble Frizzled-related protein (sFRP)1 as an estrogen-inducible gene in stromal cells, whose expression corresponded to inability to support lymphopoiesis. Bone-lining stromal cells express sFRP1, and the transcripts were elevated by pregnancy or estrogen injection. Estrogen receptor-alpha was essential for both lymphoid suppression and induction of the sFRP family. SFRP1 has been mainly described as an antagonist for complex Wnt signals. However, we found that sFRP1, like Wnt3a, stabilized beta-catenin and blocked early lymphoid progression. Myeloerythroid progenitors were less affected by sFRP1 in culture, which was similar to estrogen with respect to lineage specificity. Hematopoietic stem cells expressed various Frizzled receptors, which markedly declined as they differentiated to lymphoid lineage. Thus, hormonal control of early lymphopoiesis in adults might partly relate to sFRP1 levels.
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Affiliation(s)
- Takafumi Yokota
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
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38
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Nygren MK, Døsen-Dahl G, Stubberud H, Wälchli S, Munthe E, Rian E. beta-catenin is involved in N-cadherin-dependent adhesion, but not in canonical Wnt signaling in E2A-PBX1-positive B acute lymphoblastic leukemia cells. Exp Hematol 2008; 37:225-33. [PMID: 19101069 DOI: 10.1016/j.exphem.2008.10.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 09/29/2008] [Accepted: 10/13/2008] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The t(1;19)(q23;13) translocation, resulting in the production of the E2A-PBX1 chimeric protein, is a common nonrandom translocation in pediatric B-lineage acute lymphoblastic leukemia (B-ALL). The E2A-PBX1 chimeric protein activates expression of several genes, including Wnt16. In the present study, we explored the role of Wnt16 and beta-catenin in t(1;19) B-ALL cells. MATERIALS AND METHODS Canonical Wnt signaling was measured by TOPflash activity. Localization of beta-catenin in the cell membrane and its involvement in leukemia-stroma interaction were studied by confocal microscopy. Adhesion to N-cadherin was analyzed by adding (3)H-thymidin-labeled cells to N-cadherin-coated wells. RESULTS In contrast to previous reports, we detected no effects on cell viability or proliferation upon modulation of the Wnt16 levels. Moreover, despite high levels of Wnt16 and beta-catenin, the cells had very low levels of canonical Wnt signaling. Instead, beta-catenin was located in the cell membrane along with N-cadherin. E2A-PBX1-positive leukemia cells adhered strongly to bone marrow stroma cells, and we showed that adherence junctions stained strongly for both proteins. Moreover, knockdown of beta-catenin reduced the adhesion of E2A-PBX1-positive leukemia cells to N-cadherin, suggesting that beta-catenin and N-cadherin play a central role in homotypic cell-to-cell adhesion and in leukemia-stroma adhesion. Interestingly, knockdown of Wnt16 by small interfering RNA reduced the level of N-cadherin. CONCLUSION Wnt16 does not activate canonical Wnt signaling in E2A-PBX1-positive cells. Instead, beta-catenin is involved in N-cadherin-dependent adherence junctions, suggesting for the first time that leukemia-stroma interactions may be mediated via an N-cadherin-dependent mechanism.
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Affiliation(s)
- Marit Kveine Nygren
- Department of Immunology, Institute for Cancer Research, Norwegian Radium Hospital, Rikshospitalet University Hospital, Montebello, Oslo, Norway
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Døsen-Dahl G, Munthe E, Nygren MK, Stubberud H, Hystad ME, Rian E. Bone marrow stroma cells regulate TIEG1 expression in acute lymphoblastic leukemia cells: Role of TGFβ/BMP-6 and TIEG1 in chemotherapy escape. Int J Cancer 2008; 123:2759-66. [DOI: 10.1002/ijc.23833] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Malhotra S, Baba Y, Garrett KP, Staal FJT, Gerstein R, Kincade PW. Contrasting responses of lymphoid progenitors to canonical and noncanonical Wnt signals. THE JOURNAL OF IMMUNOLOGY 2008; 181:3955-64. [PMID: 18768850 DOI: 10.4049/jimmunol.181.6.3955] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The Wnt family of secreted glycoproteins has been implicated in many aspects of development, but its contribution to blood cell formation is controversial. We overexpressed Wnt3a, Wnt5a, and Dickkopf 1 in stromal cells from osteopetrotic mice and used them in coculture experiments with highly enriched stem and progenitor cells. The objective was to learn whether and how particular stages of B lymphopoiesis are responsive to these Wnt family ligands. We found that canonical Wnt signaling, through Wnt3a, inhibited B and plasmacytoid dendritic cell, but not conventional dendritic cell development. Wnt5a, which can oppose canonical signaling or act through a different pathway, increased B lymphopoiesis. Responsiveness to both Wnt ligands diminished with time in culture and stage of development. That is, only hematopoietic stem cells and very primitive progenitors were affected. Although Wnt3a promoted retention of hematopoietic stem cell markers, cell yields and dye dilution experiments indicated it was not a growth stimulus. Other results suggest that lineage instability results from canonical Wnt signaling. Lymphoid progenitors rapidly down-regulated RAG-1, and some acquired stem cell-staining characteristics as well as myeloid and erythroid potential when exposed to Wnt3a-producing stromal cells. We conclude that at least two Wnt ligands can differentially regulate early events in B lymphopoiesis, affecting entry and progression in distinct differentiation lineages.
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Affiliation(s)
- Sachin Malhotra
- Immunobiology and Cancer Program, Oklahoma Medical Research Foundation, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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Canonical Wnt pathway signaling suppresses VCAM-1 expression by marrow stromal and hematopoietic cells. Exp Hematol 2008; 37:19-30. [PMID: 18951693 DOI: 10.1016/j.exphem.2008.08.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Revised: 08/04/2008] [Accepted: 08/27/2008] [Indexed: 01/04/2023]
Abstract
OBJECTIVE The Wnt family may contribute to hematopoietic stem cell (HSC) maintenance in bone marrow, but many questions remain concerning mechanisms. Vascular cell adhesion molecule-1 (VCAM-1) is expressed in cellular compartments of the bone marrow and might contribute to the HSC niche, but mechanisms concerning its constitutive expression are largely unknown. We now explore the influence of Wnt signaling on cellular adhesion molecule expression by bone marrow stromal and hematopoietic cells. MATERIALS AND METHODS Recombinant Wnt ligands, retroviral Wnt transductions and cocultures with Wnt-secreting cells were used to analyze the effect of Wnt on adhesion molecule expression by stromal and hematopoietic cells. In vivo experiments were also done to assess the ability of Wnt3a-induced, VCAM-1 deficient hematopoietic cells to engraft bone marrow. RESULTS We now report that the beta-catenin-dependent canonical Wnt signaling pathway negatively regulates VCAM-1 expression on two types of bone marrow cells. Wnt pathway inhibitors, Axin (intracellular) or Dickkopf-1 (extracellular) blocked the regulation of VCAM-1 by diffusible Wnt3a. Interestingly, lipopolysaccharide restored a substantial degree of VCAM-1 expression, suggesting functional cross-talk between Wnt and TLR4 signaling pathways. Decreasing VCAM-1 on HSC-enriched Lin(-) Sca-1(+) c-Kit(Hi) Thy1.1(Lo) cells by exposure to Wnt3a did not prevent their successful transplantation. CONCLUSIONS Our results suggest that cells comprising and residing in the HSC niche can respond to Wnt ligands and extinguish VCAM-1. This response may be important for export of hematopoietic cells. Given the known contribution of VCAM-1 to inflammation, this may represent a new avenue for therapeutic intervention.
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Staal FJT, Sen JM. The canonical Wnt signaling pathway plays an important role in lymphopoiesis and hematopoiesis. Eur J Immunol 2008; 38:1788-94. [PMID: 18581335 DOI: 10.1002/eji.200738118] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The evolutionarily conserved canonical Wnt-beta-catenin-T cell factor (TCF)/lymphocyte enhancer binding factor (LEF) signaling pathway regulates key checkpoints in the development of various tissues. Therefore, it is not surprising that a large body of gain-of-function and loss-of-function studies implicate Wnt-beta-catenin signaling in lymphopoiesis and hematopoiesis. In contrast, recent papers have reported that Mx-Cre-mediated conditional deletion of beta-catenin and/or its homolog gamma-catenin (plakoglobin) did not impair hematopoiesis or lymphopoiesis. However, these studies also report that TCF reporter activity remains active in beta-catenin- and gamma-catenin-deficient hematopoietic stem cells and all cells derived from these precursors, indicating that the canonical Wnt signaling pathway was not abrogated. Therefore, these studies in fact show that the canonical Wnt signaling pathway is important in hematopoiesis and lymphopoiesis, even though the molecular basis for the induction of the reporter activity is currently unknown. In this perspective, we provide a broad background to the field with a discussion of the available data and create a framework within which the available and future studies may be evaluated.
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Affiliation(s)
- Frank J T Staal
- Department of Immunology, Erasmus University Medical Center, Rotterdam, The Netherlands.
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Abstract
WNT proteins are secreted morphogens that are required for basic developmental processes, such as cell-fate specification, progenitor-cell proliferation and the control of asymmetric cell division, in many different species and organs. In blood and immune cells, WNT signalling controls the proliferation of progenitor cells and might also affect the cell-fate decisions of stem cells. Recent studies indicate that WNT proteins also regulate effector T-cell development, regulatory T-cell activation and dendritic-cell maturation. WNT signalling seems to function as a universal mechanism in leukocytes to establish a pool of undifferentiated cells for further selection, effector-cell maturation and terminal differentiation. WNT signalling is therefore subject to strict molecular control, and dysregulated WNT signalling is implicated in the development of haematological malignancies.
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Zhou L, Hou J, Fu W, Wang D, Yuan Z, Jiang H. Arsenic trioxide and 2-methoxyestradiol reduce beta-catenin accumulation after proteasome inhibition and enhance the sensitivity of myeloma cells to Bortezomib. Leuk Res 2008; 32:1674-83. [PMID: 18485479 DOI: 10.1016/j.leukres.2008.03.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2007] [Revised: 03/27/2008] [Accepted: 03/29/2008] [Indexed: 01/20/2023]
Abstract
Beta-catenin, the key protein in canonical Wingless/int (Wnt) pathway, degrades via ubiquitin-proteasome pathway. Recently, it proved important roles in the proliferation of myeloma cells. But little is known about whether cytoplasmic beta-catenin content is associated with myeloma cell's sensitivity to Bortezomib. We examined the constitutive expression of beta-catenin in five myeloma cell lines and primary cells from patients. Meanwhile, the effect of Bortezomib combined with arsenic trioxide (As(2)O(3))/2-methoxyestradiol (2ME2) on beta-catenin accumulation, myeloma cells' survival, apoptosis and their sensitivity to Bortezomib were also investigated. Our study proved that beta-catenin protein levels are negatively associated with myeloma cells' sensitivity to Bortezomib. As(2)O(3)/2ME2 can reduce cytoplasmic beta-catenin accumulation after proteasome inhibition and enhance myeloma cells' sensitivity to Bortezomib. This will preliminarily help to optimize the new therapeutic regimens for MM treatment in the future.
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Affiliation(s)
- Lili Zhou
- Department of Hematology, the Second Affiliated Hospital to the Second Military Medical University, 415 Fengyang Road, Shanghai 200003, China
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Wnt-expressing rat embryonic fibroblasts suppress Apo2L/TRAIL-induced apoptosis of human leukemia cells. Apoptosis 2008; 13:573-87. [PMID: 18347988 DOI: 10.1007/s10495-008-0191-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 02/18/2008] [Indexed: 12/27/2022]
Abstract
Wnt signaling enhances cell proliferation and the maintenance of hematopoietic cells. In contrast, cytotoxic ligand Apo2L/TRAIL induces the apoptosis of various transformed cells. We observed that co-culture of human pre-B leukemia cells KM3 and REH with Wnt1- or Wnt3a-producing rat embryonic fibroblasts efficiently suppressed Apo2L/TRAIL-induced apoptosis of the lymphoid cells. This suppression occurs at the early stages of the Apo2L/TRAIL apoptotic cascade and, interestingly, the activation of the Wnt pathway alone in human leukemia cells is not sufficient for their full anti-apoptotic protection. We hypothesize that a stimulus emanating specifically from Wnt1- or Wnt3a-expressing rat fibroblasts is responsible for the observed resistance to Apo2L/TRAIL. This anti-apoptotic signaling was significantly hampered by the inhibition of the MEK1/ERK1/2 or NFkappaB pathways in KM3 and REH cells. Our results imply that paracrine Wnt-related signals could be important for the survival of pre-B cell-derived malignancies.
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Qiu W, Andersen TE, Bollerslev J, Mandrup S, Abdallah BM, Kassem M. Patients with high bone mass phenotype exhibit enhanced osteoblast differentiation and inhibition of adipogenesis of human mesenchymal stem cells. J Bone Miner Res 2007; 22:1720-31. [PMID: 17680723 DOI: 10.1359/jbmr.070721] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
UNLABELLED Genetic mutations in the LRP5 gene affect Wnt signaling and lead to changes in bone mass in humans. Our in vivo and in vitro results show that activated mutation T253I of LRP5 enhances osteogenesis and inhibits adipogenesis. Inactivating mutation T244M of LRP5 exerts opposite effects. INTRODUCTION Mutations in the Wnt co-receptor, LRP5, leading to decreased or increased canonical Wnt signaling, result in osteoporosis or a high bone mass (HBM) phenotype, respectively. However, the mechanisms whereby mutated LRP5 causes changes in bone mass are not known. MATERIALS AND METHODS We studied bone marrow composition in iliac crest bone biopsies from patients with the HBM phenotype and controls. We also used retrovirus-mediated gene transduction to establish three different human mesenchymal stem cell (hMSC) strains stably expressing wildtype LRP5 (hMSC-LRP5(WT)), LRP5(T244) (hMSC-LRP5(T244), inactivation mutation leading to osteoporosis), or LRP5(T253) (hMSC-LRP5(T253), activation mutation leading to high bone mass). We characterized Wnt signaling activation using a dual luciferase assay, cell proliferation, lineage biomarkers using real-time PCR, and in vivo bone formation. RESULTS In bone biopsies, we found increased trabecular bone volume and decreased bone marrow fat volume in patients with the HBM phenotype (n = 9) compared with controls (n = 5). The hMSC-LRP5(WT) and hMSC-LRP5(T253) but not hMSC-LRP5(T244) transduced high level of Wnt signaling. Wnt3a inhibited cell proliferation in hMSC-LRP5(WT) and hMSC-LRP5(T253), and this effect was associated with downregulation of DKK1. Both hMSC-LRP5(WT) and hMSC-LRP5(T253) showed enhanced osteoblast differentiation and inhibited adipogenesis in vitro, and the opposite effect was observed in hMSC-LRP5(T244). Similarly, hMSC-LRP5(WT) and hMSC-LRP5(T253) but not hMSC-LRP5(T244) formed ectopic mineralized bone when implanted subcutaneously with hydroxyapatite/tricalcium phosphate in SCID/NOD mice. CONCLUSIONS LRP5 mutations and the level of Wnt signaling determine differentiation fate of hMSCs into osteoblasts or adipocytes. Activation of Wnt signaling can thus provide a novel approach to increase bone mass by preventing the age-related reciprocal decrease in osteogenesis and increase in adipogenesis.
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Affiliation(s)
- Weimin Qiu
- Laboratory for Molecular Endocrinology (KMEB), Department of Endocrinology and Metabolism, University Hospital of Odense, Odense C, Denmark
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Khan NI, Bradstock KF, Bendall LJ. Activation of Wnt/beta-catenin pathway mediates growth and survival in B-cell progenitor acute lymphoblastic leukaemia. Br J Haematol 2007; 138:338-48. [PMID: 17614820 DOI: 10.1111/j.1365-2141.2007.06667.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study investigated the response of acute lymphoblastic leukaemia (ALL) cells to Wnt proteins. Accumulation of beta-catenin was measured by Western blotting and immunofluorescence microscopy. Reverse transcription polymerase chain reaction (RT-PCR) analysis of B-cell progenitor acute lymphoblastic leukaemia (ALL) cells revealed expression of Wnt genes, including WNT2B in 33%, WNT5A in 42%, WNT10B in 58% and WNT16B in 25% of cases. The Wnt receptors, (Frizzled) FZD7 and FZD8 were also expressed in most cases while FZD3, FZD4 and FZD9 were occasionally detected. Stimulation of ALL cells with Wnt-3a activated canonical Wnt signalling with increased expression and nuclear translocation of beta-catenin. This resulted in a 1.7- to 5.3-fold increase in cell proliferation, which was associated with enhanced cell cycle entry. A significant increase in the survival of ALL cells under conditions of serum deprivation was also observed. Microarray analysis and quantitative RT-PCR revealed that activation of the Wnt/beta-catenin pathway led to altered expression of genes involved in cell cycle regulation and apoptosis in normal and leukaemic B-cell progenitors. Our results demonstrate that Wnt-3a provides proliferative and survival cues in ALL cells. This data suggests that targeting the Wnt signalling pathway may be a useful therapeutic strategy in ALL.
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Affiliation(s)
- Naveed I Khan
- Westmead Institute for Cancer Research, Westmead Millennium Institute, University of Sydney, Sydney, SW, Australia
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Skokowa J, Welte K. LEF-1 is a decisive transcription factor in neutrophil granulopoiesis. Ann N Y Acad Sci 2007; 1106:143-51. [PMID: 17360796 DOI: 10.1196/annals.1392.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We found that lymphoid enhancer-binding factor 1 (LEF-1) is a decisive transcription factor in granulopoiesis controlling proliferation, proper lineage commitment, and granulocytic differentiation via regulation of its target genes C/EBP-alpha, cyclin D1, c-myc, and survivin. Myeloid progenitor cells of patients with severe congenital neutropenia (CN) showed a severe downregulation of LEF-1 and its target genes expression. Expression of neutrophil elastase (NE) is also severely reduced in CN myeloid progenitors. Intriguingly, ELA2 gene promoter is positively regulated by direct binding of LEF-1 or LEF-1 target gene C/EBP-alpha. In summary we demonstrated that LEF-1 is not only crucial in lymphopoiesis, but also in myelopoiesis, documenting new functions of LEF-1.
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Affiliation(s)
- Julia Skokowa
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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Nygren MK, Døsen G, Hystad ME, Stubberud H, Funderud S, Rian E. Wnt3A activates canonical Wnt signalling in acute lymphoblastic leukaemia (ALL) cells and inhibits the proliferation of B-ALL cell lines. Br J Haematol 2006; 136:400-13. [PMID: 17156404 DOI: 10.1111/j.1365-2141.2006.06442.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acute lymphoblastic leukaemia (ALL) is the most common malignancy in children. Recently, there has been a growing interest in Wnt signalling in several aspects of cellular development, including cancer formation. Little is known about Wnt signalling in B-ALL. We investigated whether activation of canonical Wnt signalling could occur in B-ALL cells and thereby play a potential role in cellular growth and/or survival. This study found that Wnt3A induced beta-catenin accumulation in both primary B-ALL cells and B-ALL leukaemia cell lines. Further, Wnt3A was shown to induce nuclear translocation of beta-catenin and TCF/Lef-1 dependent transcriptions in the B-ALL cell line Nalm-6. Examination of the mRNA expression pattern of WNT ligands, FZD receptors and WNT antagonists in Nalm-6 cells identified a set of ligands and receptors available for signalling, as well as antagonists potentially available for modulating the response. Functional analyses showed that Wnt3A inhibited the proliferation of several, but not all, B-ALL cell lines studied. Finally, microarray analysis was used to identify several Wnt3A target genes involved in a diverse range of cellular activities, which are potential mediators of the Wnt3A-restrained proliferation.
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Affiliation(s)
- Marit Kveine Nygren
- Department of Immunology, Institute for Cancer Research, The University Clinic Rikshospitalet-Radiumhospitalet HF, Montebello, Oslo, Norway
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