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Dietz A, Senf K, Karius J, Stumm R, Neuhaus EM. Glia Cells Control Olfactory Neurogenesis by Fine-Tuning CXCL12. Cells 2023; 12:2164. [PMID: 37681896 PMCID: PMC10486585 DOI: 10.3390/cells12172164] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/09/2023] Open
Abstract
Olfaction depends on lifelong production of sensory neurons from CXCR4 expressing neurogenic stem cells. Signaling by CXCR4 depends on the concentration of CXCL12, CXCR4's principal ligand. Here, we use several genetic models to investigate how regulation of CXCL12 in the olfactory stem cell niche adjusts neurogenesis. We identify subepithelial tissue and sustentacular cells, the olfactory glia, as main CXCL12 sources. Lamina propria-derived CXCL12 accumulates on quiescent gliogenic stem cells via heparan sulfate. Additionally, CXCL12 is secreted within the olfactory epithelium by sustentacular cells. Both sustentacular-cell-derived and lamina propria-derived CXCL12 are required for CXCR4 activation. ACKR3, a high-affinity CXCL12 scavenger, is expressed by mature glial cells and titrates CXCL12. The accurate adjustment of CXCL12 by ACKR3 is critical for CXCR4-dependent proliferation of neuronal stem cells and for proper lineage progression. Overall, these findings establish precise regulation of CXCL12 by glia cells as a prerequisite for CXCR4-dependent neurogenesis and identify ACKR3 as a scavenger influencing tissue homeostasis beyond embryonic development.
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Affiliation(s)
| | | | | | | | - Eva Maria Neuhaus
- Pharmacology and Toxicology, Jena University Hospital, Friedrich Schiller University Jena, Drackendorfer Str. 1, 07747 Jena, Germany; (A.D.); (K.S.); (J.K.); (R.S.)
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2
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Liu G, Chen T, Zhang X, Ma X, Shi H. Small molecule inhibitors targeting the cancers. MedComm (Beijing) 2022; 3:e181. [PMID: 36254250 PMCID: PMC9560750 DOI: 10.1002/mco2.181] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 08/23/2022] [Accepted: 08/30/2022] [Indexed: 11/23/2022] Open
Abstract
Compared with traditional therapies, targeted therapy has merits in selectivity, efficacy, and tolerability. Small molecule inhibitors are one of the primary targeted therapies for cancer. Due to their advantages in a wide range of targets, convenient medication, and the ability to penetrate into the central nervous system, many efforts have been devoted to developing more small molecule inhibitors. To date, 88 small molecule inhibitors have been approved by the United States Food and Drug Administration to treat cancers. Despite remarkable progress, small molecule inhibitors in cancer treatment still face many obstacles, such as low response rate, short duration of response, toxicity, biomarkers, and resistance. To better promote the development of small molecule inhibitors targeting cancers, we comprehensively reviewed small molecule inhibitors involved in all the approved agents and pivotal drug candidates in clinical trials arranged by the signaling pathways and the classification of small molecule inhibitors. We discussed lessons learned from the development of these agents, the proper strategies to overcome resistance arising from different mechanisms, and combination therapies concerned with small molecule inhibitors. Through our review, we hoped to provide insights and perspectives for the research and development of small molecule inhibitors in cancer treatment.
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Affiliation(s)
- Gui‐Hong Liu
- Department of BiotherapyState Key Laboratory of BiotherapyCancer Center, West China HospitalSichuan UniversityChengduChina
| | - Tao Chen
- Department of CardiologyThe First Affiliated Hospital of China Medical UniversityShenyangLiaoningChina
| | - Xin Zhang
- Department of BiotherapyState Key Laboratory of BiotherapyCancer Center, West China HospitalSichuan UniversityChengduChina
| | - Xue‐Lei Ma
- Department of BiotherapyState Key Laboratory of BiotherapyCancer Center, West China HospitalSichuan UniversityChengduChina
| | - Hua‐Shan Shi
- Department of BiotherapyState Key Laboratory of BiotherapyCancer Center, West China HospitalSichuan UniversityChengduChina
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3
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Madrazo E, González-Novo R, Ortiz-Placín C, García de Lacoba M, González-Murillo Á, Ramírez M, Redondo-Muñoz J. Fast H3K9 methylation promoted by CXCL12 contributes to nuclear changes and invasiveness of T-acute lymphoblastic leukemia cells. Oncogene 2022; 41:1324-1336. [PMID: 34999734 DOI: 10.1038/s41388-021-02168-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 12/09/2021] [Accepted: 12/22/2021] [Indexed: 02/06/2023]
Abstract
T-acute lymphoblastic leukemia (T-ALL) is an aggressive hematological malignancy that comprises the accumulation of malignant T-cells. Despite current therapies, failure to conventional treatments and relapse are frequent in children with T-ALL. It is known that the chemokine CXCL12 modulates leukemia survival and dissemination; however, our understanding of molecular mechanisms used by T-ALL cells to infiltrate and respond to leukemia cells-microenvironment interactions is still vague. In the present study, we showed that CXCL12 promoted H3K9 methylation in cell lines and primary T-ALL cells within minutes. We thus identified that CXCL12-mediated H3K9 methylation affected the global chromatin configuration and the nuclear mechanics of T-ALL cells. Importantly, we characterized changes in the genomic profile of T-ALL cells associated with rapid CXCL12 stimulation. We showed that blocking CXCR4 and protein kinase C (PKC) impaired the H3K9 methylation induced by CXCL12 in T-ALL cells. Finally, blocking H3K9 methyltransferases reduced the efficiency of T-ALL cells to deform their nuclei, migrate across confined spaces, and home to spleen and bone marrow in vivo models. Together, our data show novel functions for CXL12 as a master regulator of nuclear deformability and epigenetic changes in T-ALL cells, and its potential as a promising pharmacological target against T-ALL dissemination.
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Affiliation(s)
- Elena Madrazo
- Department of Molecular Medicine, Centro de Investigaciones Biológicas Margarita Salas (CIB Margarita Salas-CSIC), Madrid, Spain
| | - Raquel González-Novo
- Department of Molecular Medicine, Centro de Investigaciones Biológicas Margarita Salas (CIB Margarita Salas-CSIC), Madrid, Spain
| | - Cándido Ortiz-Placín
- Department of Molecular Medicine, Centro de Investigaciones Biológicas Margarita Salas (CIB Margarita Salas-CSIC), Madrid, Spain
| | - Mario García de Lacoba
- Bioinformatics and Biostatistics Unit, Centro de Investigaciones Biológicas Margarita Salas (CIB Margarita Salas-CSIC), Madrid, Spain
| | - África González-Murillo
- Department of Paediatric Haematology & Oncology, Hospital Universitario Niño Jesús, Madrid, Spain
- Health Research Institute La Princesa, Madrid, Spain
| | - Manuel Ramírez
- Department of Paediatric Haematology & Oncology, Hospital Universitario Niño Jesús, Madrid, Spain
- Health Research Institute La Princesa, Madrid, Spain
| | - Javier Redondo-Muñoz
- Department of Molecular Medicine, Centro de Investigaciones Biológicas Margarita Salas (CIB Margarita Salas-CSIC), Madrid, Spain.
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4
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Microglial Cytokines Induce Invasiveness and Proliferation of Human Glioblastoma through Pyk2 and FAK Activation. Cancers (Basel) 2021; 13:cancers13246160. [PMID: 34944779 PMCID: PMC8699228 DOI: 10.3390/cancers13246160] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/29/2021] [Accepted: 12/03/2021] [Indexed: 12/25/2022] Open
Abstract
Simple Summary Microglia infiltrate most gliomas and have been demonstrated to promote tumor growth, invasion, and treatment resistance. To develop improved treatment methods, that take into consideration the supporting role of microglia in tumor progression, the functional and mechanistic pathways of glioma–microglia interactions need to be identified and experimentally dissected. Our recent studies and literature reports revealed the overexpression of Pyk2 and FAK in glioblastomas. Pyk2 and FAK signaling pathways have been shown to regulate migration and proliferation in glioma cells, including microglia-promoted glioma cell migration. However, the specific factors released by microglia that modulate Pyk2 and FAK to promote glioma invasiveness and proliferation are poorly understood. The aim of this study was to identify key microglia-derived signaling molecules that induce the activation of Pyk2- and FAK-dependent glioma cell proliferation and invasiveness. Abstract Glioblastoma is the most aggressive brain tumor in adults. Multiple lines of evidence suggest that microglia create a microenvironment favoring glioma invasion and proliferation. Our previous studies and literature reports indicated the involvement of focal adhesion kinase (FAK) and proline-rich tyrosine kinase 2 (Pyk2) in glioma cell proliferation and invasion, stimulated by tumor-infiltrating microglia. However, the specific microglia-released factors that modulate Pyk2 and FAK signaling in glioma cells are unknown. In this study, 20 human glioblastoma specimens were evaluated with the use of RT-PCR and western blotting. A Pierson correlation test demonstrated a correlation (0.6–1.0) between the gene expression levels for platelet-derived growth factor β(PDGFβ), stromal-derived factor 1α (SDF-1α), IL-6, IL-8, and epidermal growth factor (EGF) in tumor-purified microglia and levels of p-Pyk2 (Y579/Y580) and p-FAK(Y925) in glioma cells. siRNA knockdown against Pyk2 or FAK in three primary glioblastoma cell lines, developed from the investigated specimens, in combination with the cytokine receptor inhibitors gefitinib (1 μM), DMPQ (200 nM), and burixafor (1 μM) identified EGF, PDGFβ, and SDF-1α as key extracellular factors in the Pyk2- and FAK-dependent activation of invadopodia formation and the migration of glioma cells. EGF and IL-6 were identified as regulators of the Pyk2- and FAK-dependent activation of cell viability and mitosis.
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R4 RGS proteins suppress engraftment of human hematopoietic stem/progenitor cells by modulating SDF-1/CXCR4 signaling. Blood Adv 2021; 5:4380-4392. [PMID: 34500454 PMCID: PMC8579266 DOI: 10.1182/bloodadvances.2020003307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 06/10/2021] [Indexed: 12/14/2022] Open
Abstract
Specific R4 RGS members are expressed in human HSPCs and regulated by the SDF-1/CXCR4 axis. RGS1/13/16 suppress HSPC engraftment, SDF-1 signaling, and key effectors of stem cell trafficking/maintenance.
Homing and engraftment of hematopoietic stem/progenitor cells (HSPCs) into the bone marrow (BM) microenvironment are tightly regulated by the chemokine stromal cell–derived factor-1 (SDF-1) and its G-protein–coupled receptor C-X-C motif chemokine receptor 4 (CXCR4), which on engagement with G-protein subunits, trigger downstream migratory signals. Regulators of G-protein signaling (RGS) are GTPase-accelerating protein of the Gα subunit and R4 subfamily members have been implicated in SDF-1–directed trafficking of mature hematopoietic cells, yet their expression and influence on HSPCs remain mostly unknown. Here, we demonstrated that human CD34+ cells expressed multiple R4 RGS genes, of which RGS1, RGS2, RGS13, and RGS16 were significantly upregulated by SDF-1 in a CXCR4-dependent fashion. Forced overexpression of RGS1, RGS13, or RGS16 in CD34+ cells not only inhibited SDF-1–directed migration, calcium mobilization, and phosphorylation of AKT, ERK, and STAT3 in vitro, but also markedly reduced BM engraftment in transplanted NOD/SCID mice. Genome-wide microarray analysis of RGS-overexpressing CD34+ cells detected downregulation of multiple effectors with established roles in stem cell trafficking/maintenance. Convincingly, gain-of-function of selected effectors or ex vivo priming with their ligands significantly enhanced HSPC engraftment. We also constructed an evidence-based network illustrating the overlapping mechanisms of RGS1, RGS13, and RGS16 downstream of SDF-1/CXCR4 and Gαi. This model shows that these RGS members mediate compromised kinase signaling and negative regulation of stem cell functions, complement activation, proteolysis, and cell migration. Collectively, this study uncovers an essential inhibitory role of specific R4 RGS proteins in stem cell engraftment, which could potentially be exploited to develop improved clinical HSPC transplantation protocols.
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Cai B, Lin D, Li Y, Wang L, Xie J, Dai T, Liu F, Tang M, Tian L, Yuan Y, Kong L, Shen SGF. N2-Polarized Neutrophils Guide Bone Mesenchymal Stem Cell Recruitment and Initiate Bone Regeneration: A Missing Piece of the Bone Regeneration Puzzle. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2100584. [PMID: 34382372 PMCID: PMC8498914 DOI: 10.1002/advs.202100584] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/25/2021] [Indexed: 05/14/2023]
Abstract
The role of neutrophils in bone regeneration remains elusive. In this study, it is shown that intramuscular implantation of interleukin-8 (IL-8) (commonly recognized as a chemotactic cytokine for neutrophils) at different levels lead to outcomes resembling those of fracture hematoma at various stages. Ectopic endochondral ossification is induced by certain levels of IL-8, during which neutrophils are recruited to the implanted site and are N2-polarized, which then secrete stromal cell-derived factor-1α (SDF-1α) for bone mesenchymal stem cell (BMSC) chemotaxis via the SDF-1/CXCR4 (C-X-C motif chemokine receptor 4) axis and its downstream phosphatidylinositol 3'-kinase (PI3K)/Akt pathway and β-catenin-mediated migration. Neutrophils are pivotal for recruiting and orchestrating innate and adaptive immunocytes, as well as BMSCs at the initial stage of bone healing and regeneration. The results in this study delineate the mechanism of neutrophil-initiated bone regeneration and interaction between neutrophils and BMSCs, and innate and adaptive immunities. This work lays the foundation for research in the fields of bone regenerative therapy and biomaterial development, and might inspire further research into novel therapeutic options.
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Affiliation(s)
- Bolei Cai
- Department of Oral & Cranio‐Maxillofacial SurgeryShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghai200011China
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral DiseasesDepartment of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China
| | - Dan Lin
- Department of Oral & Cranio‐Maxillofacial SurgeryShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghai200011China
| | - Yan Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral DiseasesDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China
| | - Le Wang
- Department of Oral & Cranio‐Maxillofacial SurgeryShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghai200011China
| | - Jirong Xie
- Department of Oral & Cranio‐Maxillofacial SurgeryShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghai200011China
- Department of ProsthodonticsSchool of Stomatologythe Jiamusi UniversityJiamusi154003China
| | - Taiqiang Dai
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral DiseasesDepartment of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China
| | - Fuwei Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral DiseasesDepartment of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China
| | - Mingyue Tang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral DiseasesDepartment of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China
| | - Lei Tian
- Department of Oral & Cranio‐Maxillofacial SurgeryShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghai200011China
| | - Yuan Yuan
- Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and Engineeringand Engineering Research Center for Biomedical Materials of Ministry of EducationEast China University of Science and TechnologyShanghai200237P. R. China
| | - Liang Kong
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral DiseasesDepartment of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi'an710032China
| | - Steve G. F. Shen
- Department of Oral & Cranio‐Maxillofacial SurgeryShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghai200011China
- Shanghai University of Medicine and Health SciencesShanghai201318P. R. China
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Shi Y, Riese DJ, Shen J. The Role of the CXCL12/CXCR4/CXCR7 Chemokine Axis in Cancer. Front Pharmacol 2020; 11:574667. [PMID: 33363463 PMCID: PMC7753359 DOI: 10.3389/fphar.2020.574667] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 10/29/2020] [Indexed: 12/27/2022] Open
Abstract
Chemokines are a family of small, secreted cytokines which regulate a variety of cell functions. The C-X-C motif chemokine ligand 12 (CXCL12) binds to C-X-C chemokine receptor type 4 (CXCR4) and C-X-C chemokine receptor type 7 (CXCR7). The interaction of CXCL12 and its receptors subsequently induces downstream signaling pathways with broad effects on chemotaxis, cell proliferation, migration, and gene expression. Accumulating evidence suggests that the CXCL12/CXCR4/CXCR7 axis plays a pivotal role in tumor development, survival, angiogenesis, metastasis, and tumor microenvironment. In addition, this chemokine axis promotes chemoresistance in cancer therapy via complex crosstalk with other pathways. Multiple small molecules targeting CXCR4/CXCR7 have been developed and used for preclinical and clinical cancer treatment. In this review, we describe the roles of the CXCL12/CXCR4/CXCR7 axis in cancer progression and summarize strategies to develop novel targeted cancer therapies.
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Affiliation(s)
| | | | - Jianzhong Shen
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL, United States
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8
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Kumar A, Palit P, Thomas S, Gupta G, Ghosh P, Goswami RP, Kumar Maity T, Dutta Choudhury M. Osteoarthritis: Prognosis and emerging therapeutic approach for disease management. Drug Dev Res 2020; 82:49-58. [PMID: 32931079 DOI: 10.1002/ddr.21741] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 12/21/2022]
Abstract
Osteoarthritis (OA), a disorder of joints, is prevalent in older age. The contemporary cure for OA is aimed to confer symptomatic relief, consisting of temporary pain and swelling relief. In this paper, we discuss various modalities responsible for the onset of OA and associated with its severity. Inhibition of chondrocytes receptors such as DDR2, SDF-1, Asporin, and CXCR4 by specific pharmacological inhibitors attenuates OA, a critical step for finding potential disease modifying drugs. We critically analyzed recent OA studies with an emphasis on intermediate target molecules for OA intervention. We also explored some novel and safe treatments for OA by considering disease prognosis crosstalk with cellular signaling pathways.
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Affiliation(s)
- Amresh Kumar
- Department of Life Sciences and Bioinformatics, Assam University, Silchar, India
| | - Partha Palit
- Department of Pharmaceutical Sciences, Assam University, Silchar, India
| | - Sabu Thomas
- Department of Chemical Sciences, Mahatma Gandhi University, Kottayam, India
| | - Gaurav Gupta
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada.,Area of Biotechnology and Bioinformatics, NIIT University, Neemrana, Rajasthan, India
| | - Parasar Ghosh
- Department of Rheumatology, Institute of Post Graduate Medical Education &Research, Kolkata, India
| | | | - Tapan Kumar Maity
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
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Mousavi A. CXCL12/CXCR4 signal transduction in diseases and its molecular approaches in targeted-therapy. Immunol Lett 2019; 217:91-115. [PMID: 31747563 DOI: 10.1016/j.imlet.2019.11.007] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 11/01/2019] [Accepted: 11/15/2019] [Indexed: 02/08/2023]
Abstract
Chemokines are small molecules called "chemotactic cytokines" and regulate many processes like leukocyte trafficking, homing of immune cells, maturation, cytoskeletal rearrangement, physiology, migration during development, and host immune responses. These proteins bind to their corresponding 7-membrane G-protein-coupled receptors. Chemokines and their receptors are anti-inflammatory factors in autoimmune conditions, so consider as potential targets for neutralization in such diseases. They also express by cancer cells and function as angiogenic factors, and/or survival/growth factors that enhance tumor angiogenesis and development. Among chemokines, the CXCL12/CXCR4 axis has significantly been studied in numerous cancers and autoimmune diseases. CXCL12 is a homeostatic chemokine, which is acts as an anti-inflammatory chemokine during autoimmune inflammatory responses. In cancer cells, CXCL12 acts as an angiogenic, proliferative agent and regulates tumor cell apoptosis as well. CXCR4 has a role in leukocyte chemotaxis in inflammatory situations in numerous autoimmune diseases, as well as the high levels of CXCR4, observed in different types of human cancers. These findings suggest CXCL12/CXCR4 as a potential therapeutic target for therapy of autoimmune diseases and open a new approach to targeted-therapy of cancers by neutralizing CXCL12 and CXCR4. In this paper, we reviewed the current understanding of the role of the CXCL12/CXCR4 axis in disease pathology and cancer biology, and discuss its therapeutic implications in cancer and diseases.
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10
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Yao X, Ning LJ, He SK, Cui J, Hu RN, Zhang Y, Zhang YJ, Luo JC, Ding W, Qin TW. Stem Cell Extracellular Matrix-Modified Decellularized Tendon Slices Facilitate the Migration of Bone Marrow Mesenchymal Stem Cells. ACS Biomater Sci Eng 2019; 5:4485-4495. [DOI: 10.1021/acsbiomaterials.9b00064] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Loss of LLGL1 Expression Correlates with Diffuse Gastric Cancer and Distant Peritoneal Metastases. Can J Gastroenterol Hepatol 2019; 2019:2920493. [PMID: 31058107 PMCID: PMC6463686 DOI: 10.1155/2019/2920493] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 02/21/2019] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Loss of LLGL1 has been associated with loss of cellular adhesion and dissemination of cells from colorectal cancer and malignant melanoma. Regulation and relevance of LLGL1 were analyzed in gastric cancer patients with lymphatic and distant dissemination. Furthermore, LLGL1 expression was analyzed in relation to the cellular adhesion protein E-cadherin. METHODS LLGL1 and E-cadherin transcription levels were evaluated in 56 gastric cancer patients and five gastric cancer cell lines. IHC staining for LLGL1 was performed on 39 gastric cancer specimens. LLGL1 was stably transfected into LLGL1 negative gastric cancer cell line SNU16 (del(17) (p11.2)) for functional in vitro assays and a xenograft bioassay. RESULTS Gastric cancer specimens and cell lines displayed LLGL1 and E-cadherin expression levels with variable intensity. In gastric mucosa, LLGL1 exhibited weak cytoplasmic and strong cortical staining. Loss of LLGL1 expression occurred in 65% of gastric cancers and significantly correlated with loss of E-cadherin expression (P=0.00009). Loss of LLGL1 expression was associated with the diffuse type of gastric cancer (P=0.029) with peritoneal carcinomatosis (M1; P=0.006) and with female gender (P=0.017). Stable reexpression of LLGL1 in SNU16 cells significantly increased both plastic surface adhesion and extracellular matrix proteins laminin and fibronectin, but had no impact on in vitro proliferation, apoptosis, or invasion or on in vivo proliferation or differentiation in our xenograft bioassay. CONCLUSION LLGL1 is coexpressed with E-cadherin. Loss of expression of either protein is associated with diffuse gastric cancer and peritoneal metastases. LLGL1 does not impact on proliferation or epithelial-mesenchymal transition (EMT) rather increasing cellular adhesion.
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12
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Adapala NS, Root S, Lorenzo J, Aguila H, Sanjay A. PI3K activation increases SDF-1 production and number of osteoclast precursors, and enhances SDF-1-mediated osteoclast precursor migration. Bone Rep 2019; 10:100203. [PMID: 30989092 PMCID: PMC6449702 DOI: 10.1016/j.bonr.2019.100203] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/26/2019] [Accepted: 03/19/2019] [Indexed: 01/07/2023] Open
Abstract
Our previous studies showed that in a mouse model in which PI3K-AKT activation was increased (YF mice), osteoclast numbers and levels of SDF-1, a chemokine, were augmented. The purpose of this study was to delineate the role of PI3K activation in regulating SDF-1 production and examine whether SDF-1 can stimulate differentiation and/or migration of osteoclast precursors. Using flow cytometric analysis, we demonstrated that compared to wild type mice, bone marrow of YF mice had increased numbers of CXCL12 abundant reticular (CAR) cells, that are a major cell type responsible for producing SDF-1. At the molecular level, transcription factor specificity protein 1 (Sp1) induced an increased transcription of SDF-1 that was dependent on PI3K/AKT activation. YF mice also contained an increased number of osteoclast precursors, in which expression of CXCR4, a major receptor for SDF-1, was increased. SDF-1 did not induce differentiation of osteoclast precursors into mature osteoclasts; compared to cells derived from WT mice, cells obtained from YF mice were more responsive to SDF-1. In conclusion, we demonstrate that PI3K activation resulted in increased SDF-1, increased the number of osteoclast precursors, and enhanced osteoclast precursor migration in response to SDF-1. PI3K activation regulates the number of CAR cells in mouse bone marrow. PI3K activation regulates SDF-1/CXCL12 production by CAR cells in bone marrow. PI3K/AKT activation mediates transcription of SDF-1 by regulating transcription factor Sp1. SDF-1 enhances migration of osteoclast precursors via CXCR4.
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Affiliation(s)
- Naga Suresh Adapala
- Department of Orthopaedic Surgery, Farmington, CT, USA.,U Conn Health, Farmington, CT, USA
| | - Sierra Root
- Department of Immunology, Farmington, CT, USA.,U Conn Health, Farmington, CT, USA
| | - Joseph Lorenzo
- Department of Endocrinology and Metabolism, Farmington, CT, USA.,U Conn Health, Farmington, CT, USA
| | - Hector Aguila
- Department of Immunology, Farmington, CT, USA.,U Conn Health, Farmington, CT, USA
| | - Archana Sanjay
- Department of Orthopaedic Surgery, Farmington, CT, USA.,U Conn Health, Farmington, CT, USA
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13
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Immune checkpoint blockade and its combination therapy with small-molecule inhibitors for cancer treatment. Biochim Biophys Acta Rev Cancer 2018; 1871:199-224. [PMID: 30605718 DOI: 10.1016/j.bbcan.2018.12.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 12/13/2018] [Accepted: 12/14/2018] [Indexed: 02/05/2023]
Abstract
Initially understood for its physiological maintenance of self-tolerance, the immune checkpoint molecule has recently been recognized as a promising anti-cancer target. There has been considerable interest in the biology and the action mechanism of the immune checkpoint therapy, and their incorporation with other therapeutic regimens. Recently the small-molecule inhibitor (SMI) has been identified as an attractive combination partner for immune checkpoint inhibitors (ICIs) and is becoming a novel direction for the field of combination drug design. In this review, we provide a systematic discussion of the biology and function of major immune checkpoint molecules, and their interactions with corresponding targeting agents. With both preclinical studies and clinical trials, we especially highlight the ICI + SMI combination, with its recent advances as well as its application challenges.
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14
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Cornelison RC, Brennan CE, Kingsmore KM, Munson JM. Convective forces increase CXCR4-dependent glioblastoma cell invasion in GL261 murine model. Sci Rep 2018; 8:17057. [PMID: 30451884 PMCID: PMC6242861 DOI: 10.1038/s41598-018-35141-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 10/26/2018] [Indexed: 12/28/2022] Open
Abstract
Glioblastoma is the most common and malignant form of brain cancer. Its invasive nature limits treatment efficacy and promotes inevitable recurrence. Previous in vitro studies showed that interstitial fluid flow, a factor characteristically increased in cancer, increases glioma cell invasion through CXCR4-CXCL12 signaling. It is currently unknown if these effects translate in vivo. We used the therapeutic technique of convection enhanced delivery (CED) to test if convective flow alters glioma invasion in a syngeneic GL261 mouse model of glioblastoma. The GL261 cell line was flow responsive in vitro, dependent upon CXCR4 and CXCL12. Additionally, transplanting GL261 intracranially increased the populations of CXCR4+ and double positive cells versus 3D culture. We showed that inducing convective flow within implanted tumors indeed increased invasion over untreated controls, and administering the CXCR4 antagonist AMD3100 (5 mg/kg) effectively eliminated this response. These data confirm that glioma invasion is stimulated by convective flow in vivo and depends on CXCR4 signaling. We also showed that expression of CXCR4 and CXCL12 is increased in patients having received standard therapy, when CED might be elected. Hence, targeting flow-stimulated invasion may prove beneficial as a second line of therapy, particularly in patients chosen to receive treatment by convection enhanced delivery.
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Affiliation(s)
- R Chase Cornelison
- Department of Biomedical Engineering and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, 22908, USA
| | - Caroline E Brennan
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, 22908, USA
| | - Kathryn M Kingsmore
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, 22908, USA
| | - Jennifer M Munson
- Department of Biomedical Engineering and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA.
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, 22908, USA.
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15
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A natural "GA" insertion mutation in the sequence encoding the 3'UTR of CXCL12/SDF-1α: Identification, characterization, and functional impact on mRNA splicing. Gene 2018; 681:36-44. [PMID: 30266500 DOI: 10.1016/j.gene.2018.09.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 09/19/2018] [Accepted: 09/24/2018] [Indexed: 11/20/2022]
Abstract
The CXCL12 gene produces a series of transcript variants through alternative splicing at the 3' end of its pre-mRNA. This study explores the biological activities of these alternative transcripts and the mechanisms involved in the regulation of CXCL12 transcription and RNA splicing. We identified a "GA" insertion mutation in the region of CXCL12α DNA encoding the conserved 3'UTR. This variant transcript was named CXCL12-3'GA+. The mutation occurred at a frequency of 13.2% in healthy Chinese individuals. However, its frequency in healthy Caucasians was 22.6%, significantly higher than what was observed in the Chinese. Genomic analysis indicated that the GA+ mutation likely encodes a G-quadruplex structure in close proximity to a cluster of important AU-rich elements (AREs) that are well-established regulators of mRNA stability at the 3'UTR. Experiments using molecular constructs encoding the 3'UTR of CXCL12 revealed that the GA+ allele can significantly increase gene expression compared to the WT allele. Further studies uncovered that the WT allele was associated with the production of a 225-bp minor transcript isoform (MTI) through alternative splicing resulting in the deletion of exon 2. ARMS-PCR using samples collected from cultured PBMCs of WT/GA+ genotype carriers indicated that the GA+ allele was preferentially transcribed compared to the WT allele. In summary, the study demonstrates that a GA insertion in the region encoding the 3'UTR of CXCL12α may affect gene expression through alternative mRNA splicing. This finding provides a basis for understanding how multiple elements in the sequence encoding the 3'UTR of the CXCL12 gene regulates its transcription and may lead to insights about diseases involving abnormal CXCL12α expression.
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16
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Amarante MK, Vitiello GAF, Rosa MH, Mancilla IA, Watanabe MAE. Potential use of CXCL12/CXCR4 and sonic hedgehog pathways as therapeutic targets in medulloblastoma. Acta Oncol 2018; 57:1134-1142. [PMID: 29771176 DOI: 10.1080/0284186x.2018.1473635] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Medulloblastoma (MB) is the most common malignant brain tumor occurring in children, and although high long-term survival rates have been reached with current therapeutic protocols, several neurological injuries are still observed among survivors. It has been shown that the development of MB is highly dependent on the microenvironment surrounding it and that the CXCL12 chemokine and its receptor, CXCR4 and the Sonic Hedgehog (SHH) pathway are crucial for cerebellar development, coordinating proliferation and migration of embryonic cells and malfunctions in these axes can lead to MB development. Indeed, the concomitant overactivation of these axes was suggested to define a new MB molecular subgroup. New molecules are being studied, aiming to inhibit either CXCR4 or the SHH pathways and have been tested in preclinical settings for the treatment of cancers. The use of these molecules could improve MB treatment and save patients from aggressive surgery, chemotherapy and radiotherapy regimens, which are responsible for severe neurological consequences. This review aims to summarize current data about the experimental inhibition of CXCR4 and SHH pathways in MB and its potential implications in treatment of this cancer.
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Affiliation(s)
| | | | - Marcos Henrique Rosa
- Department of Pathological Sciences, Londrina State University, Londrina, Brazil
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17
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Li L, Lim RZL, Lee LSU, Chew NSY. HIV glycoprotein gp120 enhances mesenchymal stem cell migration by upregulating CXCR4 expression. Biochim Biophys Acta Gen Subj 2018; 1862:1790-1800. [PMID: 29729309 DOI: 10.1016/j.bbagen.2018.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/27/2018] [Accepted: 05/01/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND HIV infection and/or the direct pathogenic effects of circulating HIV proteins impairs the physiological function of mesenchymal stem cells (MSCs), and contribute to the pathogenesis of age-related clinical comorbidities in people living with HIV. The SDF-1/CXCR4 pathway is vital for modulating MSC proliferation, migration and differentiation. HIV glycoprotein gp120 inhibits SDF-1 induced chemotaxis by downregulating the expression and function of CXCR4 in monocytes, B and T cells. The influence of gp120 on CXCR4 expression and migration in MSCs is unknown. METHODS We investigated CXCR4 expression and SDF-1/CXCR4-mediated MSC migration in response to gp120, and its effect on downstream signaling pathways: focal adhesion kinase (FAK)/Paxillin and extracellular signal-regulated kinase (ERK). RESULTS Gp120 upregulated MSC CXCR4 expression. This potentiated the effects of SDF-1 in inducing chemotaxis; FAK/Paxillin and ERK pathways were over-activated, thereby facilitating actin stress fiber reorganization. CXCR4 blockage or depletion abrogated the observed effects. CONCLUSION Gp120 from both T- and M- tropic HIV strains upregulated CXCR4 expression in MSCs, resulting in enhanced MSC chemotaxis in response to SDF-1. GENERAL SIGNIFICANCE HIV infection and its proteins are known to disrupt physiological differentiation of MSC; increased gp120-driven migration amplifies the total MSC population destined for ineffective and inappropriate differentiation, thus contributing to the pathogenesis of HIV-related comorbidities. Additionally, given that MSCs are permissive to HIV infection, initial cellular priming by gp120 results in increased expression of CXCR4 and could lead to co-receptor switching and cell tropism changes in chronic HIV infection and may have implications against CCR5-knockout based HIV cure strategies.
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Affiliation(s)
- Lei Li
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Ryan Z L Lim
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Lawrence S U Lee
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Division of Infectious Diseases, University Medicine Cluster, National University Hospital, Singapore
| | - Nicholas S Y Chew
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Division of Infectious Diseases, University Medicine Cluster, National University Hospital, Singapore.
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18
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Mukherjee D, Lu H, Yu L, He C, Lahiri SK, Li T, Zhao J. Krüppel-like factor 8 activates the transcription of C-X-C cytokine receptor type 4 to promote breast cancer cell invasion, transendothelial migration and metastasis. Oncotarget 2018; 7:23552-68. [PMID: 26993780 PMCID: PMC5029647 DOI: 10.18632/oncotarget.8083] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 02/25/2016] [Indexed: 02/04/2023] Open
Abstract
Krüppel-like factor 8 (KLF8) has been strongly implicated in breast cancer metastasis. However, the underlying mechanisms remain largely unknown. Here we report a novel signaling from KLF8 to C-X-C cytokine receptor type 4 (CXCR4) in breast cancer. Overexpression of KLF8 in MCF-10A cells induced CXCR4 expression at both mRNA and protein levels, as determined by quantitative real-time PCR and immunoblotting. This induction was well correlated with increased Boyden chamber migration, matrigel invasion and transendothelial migration (TEM) of the cells towards the ligand CXCL12. On the other hand, knockdown of KLF8 in MDA-MB-231 cells reduced CXCR4 expression associated with decreased cell migration, invasion and TEM towards CXCL12. Histological and database mining analyses of independent cohorts of patient tissue microarrays revealed a correlation of aberrant co-elevation of KLF8 and CXCR4 with metastatic potential. Promoter analysis indicated that KLF8 directly binds and activates the human CXCR4 gene promoter. Interestingly, a CXCR4-dependent activation of focal adhesion kinase (FAK), a known upregulator of KLF8, was highly induced by CXCL12 treatment in KLF8-overexpressing, but not KLF8 deficient cells. This activation of FAK in turn induced a further increase in KLF8 expression. Xenograft studies showed that overexpression of CXCR4, but not a dominant-negative mutant of it, in the MDA-MB-231 cells prevented the invasive growth of primary tumor and lung metastasis from inhibition by knockdown of KLF8. These results collectively suggest a critical role for a previously unidentified feed-forward signaling wheel made of KLF8, CXCR4 and FAK in promoting breast cancer metastasis and shed new light on potentially more effective anti-cancer strategies.
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Affiliation(s)
- Debarati Mukherjee
- Burnett School of Biomedical Sciences University of Central Florida College of Medicine, Orlando, FL, USA
| | - Heng Lu
- Burnett School of Biomedical Sciences University of Central Florida College of Medicine, Orlando, FL, USA
| | - Lin Yu
- Burnett School of Biomedical Sciences University of Central Florida College of Medicine, Orlando, FL, USA
| | - Chunjiang He
- School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Satadru K Lahiri
- Burnett School of Biomedical Sciences University of Central Florida College of Medicine, Orlando, FL, USA
| | - Tianshu Li
- Burnett School of Biomedical Sciences University of Central Florida College of Medicine, Orlando, FL, USA.,Current address: Cleveland Clinic, Cleveland, OH, USA
| | - Jihe Zhao
- Burnett School of Biomedical Sciences University of Central Florida College of Medicine, Orlando, FL, USA
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19
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Hjort MA, Abdollahi P, Vandsemb EN, Fenstad MH, Lund B, Slørdahl TS, Børset M, Rø TB. Phosphatase of regenerating liver-3 is expressed in acute lymphoblastic leukemia and mediates leukemic cell adhesion, migration and drug resistance. Oncotarget 2017; 9:3549-3561. [PMID: 29423065 PMCID: PMC5790482 DOI: 10.18632/oncotarget.23186] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 12/01/2017] [Indexed: 11/25/2022] Open
Abstract
Phosphatase of regenerating liver-3 (PRL-3/PTP4A3) is upregulated in multiple cancers, including BCR-ABL1- and ETV6-RUNX-positive acute lymphoblastic leukemia (ALL). With this study, we aim to characterize the biological role of PRL-3 in B cell ALL (B-ALL). Here, we demonstrate that PRL-3 expression at mRNA and protein level was higher in B-ALL cells than in normal cells, as measured by qRT-PCR or flow cytometry. Further, we demonstrate that inhibition of PRL-3 using shRNA or a small molecular inhibitor reduced cell migration towards an SDF-1α gradient in the preB-ALL cell lines Reh and MHH-CALL-4. Knockdown of PRL-3 also reduced cell adhesion towards fibronectin in Reh cells. Mechanistically, PRL-3 mediated SDF-1α stimulated calcium release, and activated focal adhesion kinase (FAK) and Src, important effectors of migration and adhesion. Finally, PRL-3 expression made Reh cells more resistance to cytarabine treatment. In conclusion, the expression level of PRL-3 was higher in B-ALL cells than in normal cells. PRL-3 promoted adhesion, migration and resistance to cytarabine. PRL-3 may represent a novel target in the treatment of B-ALL.
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Affiliation(s)
- Magnus A Hjort
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Children's Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Pegah Abdollahi
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Immunology and Transfusion Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Esten N Vandsemb
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Immunology and Transfusion Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Mona H Fenstad
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Immunology and Transfusion Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Bendik Lund
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Children's Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Tobias S Slørdahl
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Hematology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Magne Børset
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Immunology and Transfusion Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Torstein B Rø
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,Children's Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
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20
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Regulation of focal adhesion turnover in SDF-1α-stimulated migration of mesenchymal stem cells in neural differentiation. Sci Rep 2017; 7:10013. [PMID: 28855566 PMCID: PMC5577153 DOI: 10.1038/s41598-017-09736-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 07/28/2017] [Indexed: 12/13/2022] Open
Abstract
Directed migration of the transplanted mesenchymal stem cells (MSCs) to the lesion sites plays a pivotal role in the efficacy of cell-based therapy. Our previous study demonstrates that MSCs under varying neural differentiation states possess different migratory capacities in response to chemoattractants. However, the underlying mechanism has not been fully addressed. Herein, we show that the assembly and turnover of focal adhesions, the phosphorylation of FAK and paxillin, and the reorganisation of F-actin in MSCs are closely related to their differentiation states in response to SDF-1α. Upon SDF-1α stimulation, FAs turnover more rapidly with the most obvious reduction in the existing time of FAs in MSCs of 24-h preinduction that exhibit the most effective migration towards SDF-1α. Further, we confirm that PI3K/Akt and MAPK pathways participate in the regulation of SDF-1α-induced cell migration and FA assembly, and moreover, that the regulatory effects vary greatly depending on the differentiation states. Collectively, these results demonstrate that FA assembly and turnover, which is accompanied with F-actin reorganisation in response to SDF-1α, correlates closely with the differentiation states of MSCs, which might contribute to the different chemotactic responses of these cells, and thus help develop new strategy to improve the efficacy of MSCs-based therapy.
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21
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Comparative Evaluation of Chemotactic Factor Effect on Migration and Differentiation of Stem Cells of the Apical Papilla. J Endod 2017; 43:1288-1293. [PMID: 28578888 DOI: 10.1016/j.joen.2017.03.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/17/2017] [Accepted: 03/06/2017] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Cell homing strategies could potentially be used in regenerative endodontic procedures (REPs) to promote the progressive coronal migration of stem cells, including stem cells of the apical papilla (SCAPs), along with formation of a new vascular network without the need for intentional apical trauma and intracanal bleeding. Although many chemotactic factors have been investigated for different mesenchymal stem cells, their effect on SCAP migration and differentiation is not fully understood. This study aimed to comparatively evaluate the effect of stromal cell-derived factor 1 (SDF-1), transforming growth factor beta 1 (TGF-β1), platelet-derived growth factor, granulocyte colony-stimulating factor (G-CSF), or fibroblast growth factor 2 (FGF-2) on the migration and differentiation of SCAPs. METHODS A characterized SCAP cell line was fluorescently labeled with Vybrant DiO dye (Life Technologies, Grand Island, NY) and used in transwell migration assays. Cells were subjected to 1, 10, or 100 ng/mL of each factor or a combination of factors followed by detection in a fluorescent plate reader. Lastly, SCAP differentiation into a mineralizing phenotype was evaluated in the presence or absence of the tested factors by quantitative alizarin red staining and alkaline phosphatase activity. Data were analyzed with 1-way analysis of variance with the Tukey post hoc test. RESULTS Maximum migration was observed with G-CSF or FGF-2, which was significantly greater than the effects observed by the other tested factors. A combination of G-CSF with TGF-β1 significantly augmented both migration and differentiation into a mineralizing phenotype. CONCLUSIONS G-CSF appears to be well suited to be further investigated as a key chemotactic factor in cell homing-based regenerative endodontic procedures.
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22
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Phosphatidylinositol 3-Kinase and Protein Kinase C Signaling Pathways Are Involved in Stromal Cell-derived Factor-1α-mediated Transmigration of Stem Cells from Apical Papilla. J Endod 2016; 42:1076-81. [PMID: 27246650 DOI: 10.1016/j.joen.2016.04.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/13/2016] [Accepted: 04/19/2016] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Previously, we have shown that stem cells from apical papilla (SCAPs) can be chemoattracted by stromal cell-derived factor-1α (SDF-1α). The purpose of this study was to investigate the intracellular signaling pathways involved in SDF-1α-mediated migration of SCAPs. METHODS Chemotaxis assays were performed to assess the effect of phosphatidylinositol 3-kinase (PI3K) and protein kinase C (PKC) signaling pathways in the SDF-1α-mediated migration of SCAPs using inhibitors of PI3K (LY294002) or PKC (GF109203X). The Cell Counting Kit-8 assay (Dojindo Laboratories, Kumamoto, Japan) was used to evaluate the effect of the inhibitors on the proliferation of SCAPs. The expression of focal adhesion-related proteins was examined by immunofluorescence staining and Western blot analysis. Phosphorylation of PI3K subunit p85 and PKC after SDF-1α induction was evaluated by Western blot. RESULTS The inhibition of PI3K or PKC signaling pathways significantly reduced SDF-1α-mediated migration of SCAPs. The inhibitors had no effect on the proliferation of SCAPs. Immunofluorescence analysis revealed that SDF-1α stimulated focal adhesion formation and stress fiber assembly in SCAPs, in addition to up-regulation of the expression of focal adhesion molecules, including p-focal adhesion kinase, p-paxillin, and vinculin. Pretreatment with PI3K or PKC inhibitors before SDF-1α induction significantly inhibited focal adhesion molecule expression. Moreover, increased phosphorylation of p85 and PKC were observed after SDF-1α stimulation, whereas these phosphorylations were down-regulated by the inhibition of PI3K or PKC signaling pathways. CONCLUSIONS PI3K and PKC signaling pathways appear to be required for SDF-1α-mediated transmigration of SCAPs. These findings provide insights into the signaling mechanisms that underlie SDF-1α-mediated migration of SCAPs.
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23
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DUBON MARIAJOSE, PARK KISOOK. The mechanisms of substance P-mediated migration of bone marrow-derived mesenchymal stem cell-like ST2 cells. Int J Mol Med 2016; 37:1105-11. [DOI: 10.3892/ijmm.2016.2496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 02/17/2016] [Indexed: 11/06/2022] Open
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Abstract
This review discusses the potential of CXCR4 chemokine receptor in the design of anticancer and antimetastatic drug delivery systems. The role of CXCR4 in cancer progression and metastasis is discussed in the context of the development of several types of drug delivery strategies. Overview of drug delivery systems targeted to cancers that overexpress CXCR4 is provided, together with the main types of CXCR4-binding ligands used in targeting applications. Drug delivery applications that take advantage of CXCR4 inhibition to achieve enhanced anticancer and antimetastatic activity of combination treatments are also discussed.
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Affiliation(s)
- Yan Wang
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - Ying Xie
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - David Oupický
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA ; Department of Pharmaceutical Sciences, China Pharmaceutical University, Nanjing, China
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25
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Wei H, Zhao X, Yuan R, Dai X, Li Y, Liu L. Effects of PB-EPCs on Homing Ability of Rabbit BMSCs via Endogenous SDF-1 and MCP-1. PLoS One 2015; 10:e0145044. [PMID: 26660527 PMCID: PMC4682485 DOI: 10.1371/journal.pone.0145044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 11/29/2015] [Indexed: 01/07/2023] Open
Abstract
Traumas, infections, tumors, and some congenital malformations can lead to bone defects or even bone loss. The goal of the present study was to investigate whether inclusion of endothelial progenitor cells derived from peripheral blood (PB–EPCs) in cell-seeded partially deproteinized bone (PDPB) implants would stimulate recruitment of systemically injected bone marrow stromal cells (BMSCs) to the implant. Methods: BMSCs were injected intravenously with lentiviral expression vector expressing enhanced green fluorescent protein (eGFP) for tracing. Recruitment of eGFP-positive BMSCs was tested for the following implant configurations: 1) seeded with both BMSC and PB-EPC, 2) BMSC alone, 3) PB-EPC alone, and 4) unseeded PDPB. Protein and mRNA levels of endogenous stromal-derived factor-1 (SDF-1) and its receptor CXCR4, as well as monocyte chemotactic protein-1 (MCP-1) and its receptor CCR2, were evaluated on the 8th week. Immunohistochemical staining was performed to determine eGFP-positive areas at the defective sites. Masson’s trichrome staining was conducted to observe the distribution of collagen deposition and evaluate the extent of osteogenesis. Results: The mRNA and protein levels of SDF-1 and CXCR4 in the co-culture group were higher than those in other groups (p < 0.05) 8 weeks after the surgery. MCP-1 mRNA level in the co-culture group was also higher than that in the other groups (p < 0.05). Immunohistochemical assays revealed that the area covered by eGFP-positive cells was larger in the co-culture group than in the other groups (p < 0.05) after 4 weeks. Masson’s trichrome staining revealed better osteogenic potential of the co-culture group compared to the other groups (p < 0.05). Conclusion: These experiments demonstrate an association between PB-EPC and BMSC recruitment mediated by the SDF-1/CXCR4 axis that can enhance repair of bone defects.
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Affiliation(s)
- Hanxiao Wei
- Department of Plastic Surgery, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, PR of China
| | - Xian Zhao
- Department of Plastic Surgery, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, PR of China
| | - Ruihong Yuan
- Department of Plastic Surgery, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, PR of China
| | - Xiaoming Dai
- Department of Plastic Surgery, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, PR of China
| | - Yisong Li
- Department of Plastic Surgery, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, PR of China
| | - Liu Liu
- Department of Plastic Surgery, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, PR of China
- * E-mail:
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26
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Abstract
Chemokines mediate numerous physiological and pathological processes related primarily to cell homing and migration. The chemokine CXCL12, also known as stromal cell-derived factor-1, binds the G-protein-coupled receptor CXCR4, which, through multiple divergent pathways, leads to chemotaxis, enhanced intracellular calcium, cell adhesion, survival, proliferation, and gene transcription. CXCR4, initially discovered for its involvement in HIV entry and leukocytes trafficking, is overexpressed in more than 23 human cancers. Cancer cell CXCR4 overexpression contributes to tumor growth, invasion, angiogenesis, metastasis, relapse, and therapeutic resistance. CXCR4 antagonism has been shown to disrupt tumor-stromal interactions, sensitize cancer cells to cytotoxic drugs, and reduce tumor growth and metastatic burden. As such, CXCR4 is a target not only for therapeutic intervention but also for noninvasive monitoring of disease progression and therapeutic guidance. This review provides a comprehensive overview of the biological involvement of CXCR4 in human cancers, the current status of CXCR4-based therapeutic approaches, as well as recent advances in noninvasive imaging of CXCR4 expression.
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Affiliation(s)
- Samit Chatterjee
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, Maryland, USA
| | - Babak Behnam Azad
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, Maryland, USA
| | - Sridhar Nimmagadda
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, Maryland, USA.
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27
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de Lourdes Perim A, Amarante MK, Guembarovski RL, de Oliveira CEC, Watanabe MAE. CXCL12/CXCR4 axis in the pathogenesis of acute lymphoblastic leukemia (ALL): a possible therapeutic target. Cell Mol Life Sci 2015; 72:1715-23. [PMID: 25572297 PMCID: PMC11113340 DOI: 10.1007/s00018-014-1830-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 12/09/2014] [Accepted: 12/30/2014] [Indexed: 01/23/2023]
Abstract
Acute lymphoblastic leukemia (ALL) is the commonest childhood malignancy, accounting for approximately 80 % of leukemia in the pediatric group, and its etiology is unknown. This neoplasia is characterized by male predominance, high-risk features and poor outcome, mainly in recurrence patients and adults. In recent years, advances in the success of childhood ALL treatment were verified, and the rate of cure is over 80 % of individuals. However, there is a considerable scope for improving therapeutic outcome in this neoplasia. Improvements in ALL therapy might readily be achieved by developing additional biomarkers that can predict and refine prognosis in patients with ALL. In normal hematopoietic cells, cytokines provide the stimulus for proliferation, survival, self-renewal, differentiation and functional activation. Abnormalities of cytokines are characteristic in all forms of leukemia, including ALL. The stromal cell-derived factor-1 (SDF-1 or CXCL12) is a member of the CXC chemokine family that binds to CXC chemokine receptor 4 (CXCR4). The CXCL12/CXCR4 axis appears to play a role in dissemination of solid tumors and hematopoietic diseases. Understanding the mechanisms by which ALL cells are disseminated will provide additional information to expand therapeutic approach. Therefore, this review summarizes information relating to ALL cell biology, focusing specifically in a cytokine receptor important axis, CXCL12/CXCR4, that may have implications for novel treatment strategies to improve life expectancy of patients with this neoplasia.
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Affiliation(s)
- Aparecida de Lourdes Perim
- Laboratory of Hematology, Department of Pathology, Clinical and Toxicological Analysis, Health Sciences Center, State University of Londrina, Av. Robert Koch, 60, Vila Operária, Londrina, PR 86038-440 Brazil
| | - Marla Karine Amarante
- Laboratory of Hematology, Department of Pathology, Clinical and Toxicological Analysis, Health Sciences Center, State University of Londrina, Av. Robert Koch, 60, Vila Operária, Londrina, PR 86038-440 Brazil
| | - Roberta Losi Guembarovski
- Laboratory of Study and Application of DNA Polymorphisms, Department of Pathological Sciences, Biological Sciences Center, State University of Londrina, Campus Universitário-Rod. Celso Garcia Cid (PR 445) Km 380, Londrina, PR 86051-970 Brazil
| | - Carlos Eduardo Coral de Oliveira
- Laboratory of Study and Application of DNA Polymorphisms, Department of Pathological Sciences, Biological Sciences Center, State University of Londrina, Campus Universitário-Rod. Celso Garcia Cid (PR 445) Km 380, Londrina, PR 86051-970 Brazil
| | - Maria Angelica Ehara Watanabe
- Laboratory of Study and Application of DNA Polymorphisms, Department of Pathological Sciences, Biological Sciences Center, State University of Londrina, Campus Universitário-Rod. Celso Garcia Cid (PR 445) Km 380, Londrina, PR 86051-970 Brazil
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Pyeon D, Park IW. Interaction between Nef and INI1/SMARCB1 augments replicability of HIV-1 in resting human peripheral blood mononuclear cells. Arch Virol 2015; 160:727-37. [PMID: 25559666 DOI: 10.1007/s00705-014-2315-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 12/14/2014] [Indexed: 02/03/2023]
Abstract
A central feature of HIV-1 infection is the inability of entering virus to integrate into chromosomes of resting T lymphocytes unless they are mitogenically activated. In contrast, SIVpbj1.9 replicates in initially resting T lymphocytes by activating infected cells. Previous reports have shown that a difference in Nef-mediated T cell activation between HIV-1 and SIVpbj1.9 plays a critical role in the differing abilities of these viruses to replicate in resting lymphocytes. However, the molecular details of these differences are still unclear. Here, we show that infection with a chimeric virus, HSIVnef, which harbors the 5' 308 nucleotides of SIVpbj1.9 nef in place of the 5' 221 nucleotides of HIV-1 nef in the HIV-1 proviral backbone, resulted in integration of the provirus into host chromosomes without mitogenic activation and thereby replication in resting human PBMCs (hPBMCs). These results indicate that Nef is an essential viral determinant for the integration of provirus into host chromosomes in resting T cells. Using the yeast two-hybrid system, we identified integrase interactor-1 (INI1/SMARCB1) as a cellular factor that is involved in the integration process via interaction with Nef. Although INI1 interacted with both SIVpbj1.9 and HIV-1 Nefs, SIVpbj1.9 Nef, but not HIV-1 Nef, enhanced proviral integration into host DNA. Furthermore, mutational analysis revealed that the basic-amino-acid-rich amino-terminal domain in SIVpbj1.9 Nef is crucial for interaction with INI1 and virus replication in resting hPBMCs. Taken together, these data indicate that Nef is a critical viral protein for incorporating nascent proviral DNA into host chromosomes in resting PBMCs and that this occurs through interaction with INI1. This elucidates the basis for replication of the integrated provirus when the host cell is in a resting state.
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Affiliation(s)
- Dohun Pyeon
- Departments of Immunology and Microbiology, and Medicine, University of Colorado School of Medicine, 12800 E. 19th Ave. MS 8333, Aurora, CO, 80045, USA,
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[CXCR4: a new therapeutic target of the leukaemic cell? Role of the SDF-1/CXCR4 axis in acute myeloid leukaemia]. Bull Cancer 2014; 101:593-604. [PMID: 24977448 DOI: 10.1684/bdc.2014.1925] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
CXCR4, receptor of the chemokine SDF-1 (stromal cell-derived factor 1) plays a major role in the normal hematopoiesis but also in the biology of the leukaemic cell. This receptor is expressed on the surface of blasts and is a key molecule in "the anchoring" of the leukaemic stem cell (LSC) within the bone marrow niche. The interactions of the LSC with the bone marrow microenvironment promote survival signals and drug resistance. Recent flow cytometry analyses reported that CXCR4 expression levels have a major prognostic impact in acute myeloid leukaemia (AML). CXCR4 expression is associated with poor prognosis and can be useful to stratify patients, according to their phenotype, in order to establish risk-adapted strategies. Newly diagnosed AML are now routinely stratified according to molecular markers which guide prognosis and treatment. Many leukaemia are composed of multiples subclones with differential susceptibility to treatment and specific targeted therapies are missing. Despite therapeutic improvements for the treatment of AML, long term survival remains poor. Targeting CXCR4 is a novel promising approach of therapy. CXCR4 antagonists are used in combination with chemotherapy in preclinical and clinical studies. This review summarises our current knowledge regarding the key role of CXCR4 in AML and discusses how targeting this pathway could provide an interesting approach to eradicate the LSC.
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Neural Differentiation of Mesenchymal Stem Cells Influences Their Chemotactic Responses to Stromal Cell-Derived Factor-1α. Cell Mol Neurobiol 2014; 34:1047-58. [DOI: 10.1007/s10571-014-0082-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 07/01/2014] [Indexed: 01/05/2023]
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Abstract
Blood is renewed throughout the entire life. The stem cells of the blood, called hematopoietic stem cells (HSCs), are responsible for maintaining a supply of all types of fresh blood cells. In contrast to other stem cells, the clinical application of these cells is well established and HSC transplantation is an established life-saving therapy for patients suffering from haematological disorders. Despite their efficient functionality throughout life in vivo, controlling HSC behaviour in vitro (including their proliferation and differentiation) is still a major task that has not been resolved with standard cell culture systems. Targeted HSC multiplication in vitro could be beneficial for many patients, because HSC supply is limited. The biology of these cells and their natural microenvironment - their niche - remain a matter of ongoing research. In recent years, evidence has come to light that HSCs are susceptible to physical stimuli. This makes the regulation of HSCs by engineering physical parameters a promising approach for the targeted manipulation of these cells for clinical applications. Nevertheless, the biophysical regulation of these cells is still poorly understood. This review sheds light on the role of biophysical parameters in HSC biology and outlines which knowledge on biophysical regulation identified in other cell types could be applied to HSCs.
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Affiliation(s)
- C Lee-Thedieck
- Karlsruhe Institute of Technology (KIT), Institute of Functional Interfaces, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
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Thomaidis T, Maderer A, Al-Batran SE, Kany J, Pauligk C, Steinmetz K, Schad A, Hofheinz R, Schmalenberg H, Homann N, Galle PR, Moehler M. VEGFR-3 and CXCR4 as predictive markers for treatment with fluorouracil, leucovorin plus either oxaliplatin or cisplatin in patients with advanced esophagogastric cancer: a comparative study of the Arbeitsgemeinschaft Internistische Onkologie (AIO). BMC Cancer 2014; 14:476. [PMID: 24981311 PMCID: PMC4094395 DOI: 10.1186/1471-2407-14-476] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 06/18/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Combination of fluoropyrimidines and a platinum derivative are currently standards for systemic chemotherapy in advanced adenocarcinoma of the stomach and gastroesophageal junction (GEJ). Nevertheless, individual likelihood for response to these therapeutic regimes remains uncertain. Even more, no predictive markers are available to determine which patients may benefit more from oxaliplatin versus cisplatin or vice versa. The new invasion and stem cell markers VEGFR-3 and CXCR4 have been linked prognostically with more aggressive esophagogastric cancer types. Thus, we aimed to assess correlations of VEGFR-3 and CXCR4 expression levels with clinical outcome in a randomized phase III study of patients with oxaliplatin/leucovorin/5-FU (FLO) versus cisplatin/leucovorin/5-FU (FLP). METHODS The patients data examined in this study (n = 72) were from the collective of the FLO vs. FLP phase III AIO trial. Tumour tissues were stained via immunohistochemistry for VEGFR-3 and CXCR4 expression and results were evaluated by two independent, blinded investigators.Outcome parameter: Survival analysis was calculated for patients receiving FLO vs. FLP in relation to VEGFR-3 and CXCR4 expression. RESULTS 54% and 36% of the examined tumour tissues showed strong positive expression of VEGFR-3 and CXCR4 respectively. No superiority of each regime was detected in terms of overall survival (OS) in the whole population. Patients with strong expression of CXCR4 on their tumour tissues profited more in terms of OS under the treatment of FLP (mOS: 28 vs 15 months, p = 0.05 respectively). Patients with negative VEGFR-3 and CXCR4 expression had a trend to live longer when FLO regime was applied (mOS: 22 vs. 9 months, p = 0.099 and 20 vs. 10 months, p = 0.073 respectively). In an exploratory analysis of patients older than 60 years at diagnosis, we observed a significant benefit in overall survival for VEGFR-3 and CXCR4-positive patients when treated with FLP (p = 0.002, p = 0.021 respectively). CONCLUSIONS CXCR4 positive patients profited in terms of OS from FLP, whereas FLO proved to be more effective in CXCR4 and VEGFR-3 negative patients. Our results suggest, despite the limited size of the study, a predictive value of these biomarkers concerning chemotherapy with FLP or FLO in advanced esophagogastric cancer.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Markus Moehler
- I, Medical Department, Johannes-Gutenberg University of Mainz, Langenbeckstr,1, 55131 Mainz, Germany.
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Burkhardt AM, Maravillas-Montero JL, Carnevale CD, Vilches-Cisneros N, Flores JP, Hevezi PA, Zlotnik A. CXCL17 is a major chemotactic factor for lung macrophages. THE JOURNAL OF IMMUNOLOGY 2014; 193:1468-74. [PMID: 24973458 DOI: 10.4049/jimmunol.1400551] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Chemokines are a superfamily of chemotactic cytokines that direct the movement of cells throughout the body under homeostatic and inflammatory conditions. The mucosal chemokine CXCL17 was the last ligand of this superfamily to be characterized. Several recent studies have provided greater insight into the basic biology of this chemokine and have implicated CXCL17 in several human diseases. We sought to better characterize CXCL17's activity in vivo. To this end, we analyzed its chemoattractant properties in vivo and characterized a Cxcl17 (-/-) mouse. This mouse has a significantly reduced number of macrophages in its lungs compared with wild-type mice. In addition, we observed a concurrent increase in a new population of macrophage-like cells that are F4/80(+)CDllc(mid). These results indicate that CXCL17 is a novel macrophage chemoattractant that operates in mucosal tissues. Given the importance of macrophages in inflammation, these observations strongly suggest that CXCL17 is a major regulator of mucosal inflammatory responses.
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Affiliation(s)
- Amanda M Burkhardt
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, Irvine, CA 92697; Institute for Immunology, University of California, Irvine, Irvine, CA 92697; and
| | - José L Maravillas-Montero
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, Irvine, CA 92697; Institute for Immunology, University of California, Irvine, Irvine, CA 92697; and
| | - Christina D Carnevale
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, Irvine, CA 92697; Institute for Immunology, University of California, Irvine, Irvine, CA 92697; and
| | - Natalia Vilches-Cisneros
- Department of Pathologic Anatomy and Cytopathology, University of Nuevo Leon, Monterrey, Nuevo Leon 64460, Mexico
| | - Juan P Flores
- Department of Pathologic Anatomy and Cytopathology, University of Nuevo Leon, Monterrey, Nuevo Leon 64460, Mexico
| | - Peter A Hevezi
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, Irvine, CA 92697; Institute for Immunology, University of California, Irvine, Irvine, CA 92697; and
| | - Albert Zlotnik
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, Irvine, CA 92697; Institute for Immunology, University of California, Irvine, Irvine, CA 92697; and
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Villalvilla A, Gomez R, Roman-Blas JA, Largo R, Herrero-Beaumont G. SDF-1 signaling: a promising target in rheumatic diseases. Expert Opin Ther Targets 2014; 18:1077-87. [DOI: 10.1517/14728222.2014.930440] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Park MS, Kim YH, Jung Y, Kim SH, Park JC, Yoon DS, Kim SH, Lee JW. In Situ Recruitment of Human Bone Marrow-Derived Mesenchymal Stem Cells Using Chemokines for Articular Cartilage Regeneration. Cell Transplant 2014; 24:1067-83. [PMID: 24759682 DOI: 10.3727/096368914x681018] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Bone marrow-derived mesenchymal stem cells (BMSCs) are a good cell source for regeneration of cartilage as they can migrate directly to the site of cartilage injury and differentiate into articular chondrocytes. Articular cartilage defects do not heal completely due to the lack of chondrocytes or BMSCs at the site of injury. In this study, the chemotaxis of BMSCs toward chemokines, which may give rise to a complete regeneration of the articular cartilage, was investigated. CCR2, CCR4, CCR6, CXCR1, and CXCR2 were expressed in normal BMSCs and were increased significantly upon treatment with proinflammatory cytokines. BMSC migration was increased by MIP-3α and IL-8 more than by MCP-1 or SDF-1α. IL-8 and MIP-3α significantly enhanced the chemotaxis of BMSCs compared with MCP-1, SDF-1α, or PBS. Human BMSC recruitment to transplanted scaffolds containing either IL-8 or MIP-3α significantly increased in vivo compared to scaffolds containing PBS. Furthermore, IL-8- and MIP-3α-containing scaffolds enhanced tissue regeneration of an osteochondral defect site in beagle knee articular cartilage. Therefore, this study suggests that IL-8 and MIP-3α are the candidates that induce the regeneration of damaged articular cartilage.
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Affiliation(s)
- Min Sung Park
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, South Korea
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Lipfert J, Ödemis V, Wagner DC, Boltze J, Engele J. CXCR4 and CXCR7 form a functional receptor unit for SDF-1/CXCL12 in primary rodent microglia. Neuropathol Appl Neurobiol 2014; 39:667-80. [PMID: 23289420 DOI: 10.1111/nan.12015] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 11/30/2012] [Indexed: 12/25/2022]
Abstract
AIMS Microglial cells have been originally identified as a target for the CXC chemokine, SDF-1, by their expression of CXCR4. More recently, it has been recognized that SDF-1 additionally binds to CXCR7, which depending on the cell type acts as either a nonclassical, a classical or a scavenger chemokine receptor. Here, we asked whether primary microglial cells additionally express CXCR7 and if so how this chemokine receptor functions in this cell type. METHODS CXCR4 and CXCR7 expression was analysed in cultured rat microglia and in the brain of animals with permanent occlusion of the middle cerebral artery (MCAO) by either Western blotting, RT-PCR, flow cytometry and/or immunocytochemistry. The function of CXCR4 and CXCR7 was assessed in the presence of selective antagonists. RESULTS Cultured primary rat microglia expressed CXCR4 and CXCR7 to similar levels. Treatment with SDF-1 resulted in the activation of Erk1/2 and Akt signalling. Erk1/2 and Akt signalling were required for subsequent SDF-1-dependent promotion of microglial proliferation. In contrast, Erk1/2 signalling was sufficient for SDF-1-induced migration of microglial cells. Both SDF-1-dependent signalling and the resulting effects on microglial proliferation and migration were abrogated following pharmacological inactivation of either CXCR4 or CXCR7. Moreover, treatment of cultured microglia with lipopolysaccharide resulted in the co-ordinated up-regulation of CXCR4 and CXCR7 expression. Likewise, reactive microglia accumulating in the area adjacent to the lesion core in MCAO rats expressed both CXCR4 and CXCR7. CONCLUSIONS CXCR4 and CXCR7 form a functional receptor unit in microglial cells, which is up-regulated during activation of microglia both in vitro and in vivo.
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Affiliation(s)
- J Lipfert
- Institute of Anatomy, Medical Faculty, University of Leipzig, Leipzig, Germany
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Janczar S, Graham JS, Paige AJW, Gabra H. Targeting locoregional peritoneal dissemination in ovarian cancer. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/17474108.4.2.133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Abstract
Chemokines are low-molecular-weight, secreted proteins that act as leukocyte-specific chemoattractants. The chemokine family has more than 40 members. Based on the position of two conserved cysteines in the N-terminal domain, chemokines can be divided into the CXC, C, CC, and CX3C subfamilies. The interaction of chemokines with their receptors mediates signaling pathways that play critical roles in cell migration, differentiation, and proliferation. The receptors for chemokines are G protein-coupled receptors (GPCRs), and thus far, seven CXC receptors have been cloned and are designated CXCR1-7. Constitutively active GPCRs are present in several human immune-mediated diseases and in tumors, and they have provided valuable information in understanding the molecular mechanism of GPCR activation. Several constitutively active CXC chemokine receptors include the V6.40A and V6.40N mutants of CXCR1; the D3.49V variant of CXCR2; the N3.35A, N3.35S, and T2.56P mutants of CXCR3; the N3.35 mutation of CXCR4; and the naturally occurring KSHV-GPCR. Here, we review the regulation of CXC chemokine receptor signaling, with a particular focus on the constitutive activation of these receptors and the implications in physiological conditions and in pathogenesis. Understanding the mechanisms behind the constitutive activation of CXC chemokine receptors may aid in pharmaceutical design and the screening of inverse agonists and allosteric modulators for the treatment of autoimmune diseases and cancers.
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Affiliation(s)
- Xinbing Han
- Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
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Mao S, Huang S. The signaling pathway of stromal cell-derived factor-1 and its role in kidney diseases. J Recept Signal Transduct Res 2013; 34:85-91. [PMID: 24303939 DOI: 10.3109/10799893.2013.865746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The chemokine stromal cell-derived factor-1 (SDF-1) regulates the trafficking of progenitor cell (PGC) during embryonic development, cell chemotaxis, and postnatal homing into injury sites. SDF-1 also regulates cell growth, survival, adhesion and angiogenesis. However, in different tissues/cells, the role of SDF-1 is different, such as that it is increased in most of the tumors and associated with cancer metastasis, whereas it is essential for the development of vasculature. For kidney diseases, its role remains controversial. Signaling pathways might be very important in the pathogenesis of kidney diseases. We performed this review to provide a relatively complete signaling pathway flowchart for SDF-1 to the investigators who were interested in the role of SDF-1 in the pathogenesis of kidney diseases. Here, we reviewed the signal transduction pathway of SDF-1 and its role in the pathogenesis of kidney diseases.
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Affiliation(s)
- Song Mao
- Department of Nephrology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University , Nanjing , China
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Klamer SE, Kuijk CGM, Hordijk PL, van der Schoot CE, von Lindern M, van Hennik PB, Voermans C. BIGH3 modulates adhesion and migration of hematopoietic stem and progenitor cells. Cell Adh Migr 2013; 7:434-49. [PMID: 24152593 DOI: 10.4161/cam.26596] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Cell adhesion and migration are important determinants of homing and development of hematopoietic stem and progenitor cells (HSPCs) in bone marrow (BM) niches. The extracellular matrix protein transforming growth factor-β (TGF-β) inducible gene H3 (BIGH3) is involved in adhesion and migration, although the effect of BIGH3 is highly cell type-dependent. BIGH3 is abundantly expressed by mesenchymal stromal cells, while its expression in HSPCs is relatively low unless induced by certain BM stressors. Here, we set out to determine how BIGH3 modulates HSPC adhesion and migration. We show that primary HSPCs adhere to BIGH3-coated substrates, which is, in part, integrin-dependent. Overexpression of BIGH3 in HSPCs and HL60 cells reduced the adhesion to the substrate fibronectin in adhesion assays, which was even more profound in electrical cell-substrate impedance sensing (ECIS) assays. Accordingly, the CXCL12 induced migration over fibronectin-coated surface was reduced in BIGH3-expressing HSPCs. The integrin expression profile of HSPCs was not altered upon BIGH3 expression. Although expression of BIGH3 did not alter actin polymerization in response to CXCL12, it inhibited the PMA-induced activation of the small GTPase RAC1 as well as the phosphorylation and activation of extracellular-regulated kinases (ERKs). Reduced activation of ERK and RAC1 may be responsible for the inhibition of cell adhesion and migration by BIGH3 in HSPCs. Induced BIGH3 expression upon BM stress may contribute to the regulation of BM homeostasis.
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Affiliation(s)
- Sofieke E Klamer
- Department of Hematopoiesis; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands
| | - Carlijn G M Kuijk
- Department of Hematopoiesis; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands
| | - Peter L Hordijk
- Department of Molecular Cell Biology; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands
| | - C Ellen van der Schoot
- Department of Experimental Immunohematology; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands; Department of Hematology; Academic Medical Centre; Amsterdam, the Netherlands
| | - Marieke von Lindern
- Department of Hematopoiesis; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands
| | - Paula B van Hennik
- Department of Hematopoiesis; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands
| | - Carlijn Voermans
- Department of Hematopoiesis; Sanquin Research and Landsteiner Laboratory; Academic Medical Centre; University of Amsterdam; Amsterdam, the Netherlands
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Lapid K, Itkin T, D'Uva G, Ovadya Y, Ludin A, Caglio G, Kalinkovich A, Golan K, Porat Z, Zollo M, Lapidot T. GSK3β regulates physiological migration of stem/progenitor cells via cytoskeletal rearrangement. J Clin Invest 2013; 123:1705-17. [PMID: 23478410 DOI: 10.1172/jci64149] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 01/14/2013] [Indexed: 02/06/2023] Open
Abstract
Regulation of hematopoietic stem and progenitor cell (HSPC) steady-state egress from the bone marrow (BM) to the circulation is poorly understood. While glycogen synthase kinase-3β (GSK3β) is known to participate in HSPC proliferation, we revealed an unexpected role in the preferential regulation of CXCL12-induced migration and steady-state egress of murine HSPCs, including long-term repopulating HSCs, over mature leukocytes. HSPC egress, regulated by circadian rhythms of CXCL12 and CXCR4 levels, correlated with dynamic expression of GSK3β in the BM. Nevertheless, GSK3β signaling was CXCL12/CXCR4 independent, suggesting that synchronization of both pathways is required for HSPC motility. Chemotaxis of HSPCs expressing higher levels of GSK3β compared with mature cells was selectively enhanced by stem cell factor-induced activation of GSK3β. Moreover, HSPC motility was regulated by norepinephrine and insulin-like growth factor-1 (IGF-1), which increased or reduced, respectively, GSK3β expression in BM HSPCs and their subsequent egress. Mechanistically, GSK3β signaling promoted preferential HSPC migration by regulating actin rearrangement and microtubuli turnover, including CXCL12-induced actin polarization and polymerization. Our study identifies a previously unknown role for GSK3β in physiological HSPC motility, dictating an active, rather than a passive, nature for homeostatic egress from the BM reservoir to the blood circulation.
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Affiliation(s)
- Kfir Lapid
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
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Réaux-Le Goazigo A, Van Steenwinckel J, Rostène W, Mélik Parsadaniantz S. Current status of chemokines in the adult CNS. Prog Neurobiol 2013; 104:67-92. [PMID: 23454481 DOI: 10.1016/j.pneurobio.2013.02.001] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 02/01/2013] [Accepted: 02/03/2013] [Indexed: 12/13/2022]
Abstract
Chemokines - chemotactic cytokines - are small secreted proteins that attract and activate immune and non-immune cells in vitro and in vivo. It has been suggested that chemokines and their receptors play a role in the central nervous system (CNS), in addition to their well established role in the immune system. We focus here on three chemokines-CXCL12 (C-X-C motif ligand 12), CCL2 (C-C motif ligand 2), and CX3CL1 (C-X-3C motif ligand 1) - and their principal receptors - CXCR4 (C-X-C motif receptor 4), CCR2 (C-C motif receptor 2) and CX3CR1 (C-X-3C motif receptor 1), respectively. We first introduce the classification of chemokines and their G-protein coupled receptors and the main signaling pathways triggered by receptor activation. We then discuss the cellular distribution of CXCL12/CXCR4, CCL2/CCR2 and CX3CL1/CX3CR1 in adult brain and the neurotransmission and neuromodulation effects controlled by these chemokines in the adult CNS. Changes in the expression of CXCL12, CCL2 and CX3CL1 and their respective receptors are also increasingly being implicated in the pathogenesis of CNS disorders, such as Alzheimer's disease, Parkinson's disease, HIV-associated encephalopathy, stroke and multiple sclerosis, and are therefore plausible targets for future pharmacological intervention. The final section thus discusses the role of these chemokines in these pathophysiological states. In conclusion, the role of these chemokines in cellular communication may make it possible: (i) to identify new pathways of neuron-neuron, glia-glia or neuron-glia communications relevant to both normal brain function and neuroinflammatory and neurodegenerative diseases; (ii) to develop new therapeutic approaches for currently untreatable brain diseases.
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Zheng B, Wang C, He L, Xu X, Qu J, Hu J, Zhang H. Neural differentiation of mesenchymal stem cells influences chemotactic responses to HGF. J Cell Physiol 2012; 228:149-62. [PMID: 22570218 DOI: 10.1002/jcp.24114] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recently, mesenchymal stem cells (MSCs) have been extensively used for cell-based therapies in neuronal degenerative disease. Although much effort has been devoted to the delineation of factors involved in the migration of MSCs, the relationship between the chemotactic responses and the differentiation status of these cells remains elusive. Here, we report that MSCs in varying neural differentiation states display different chemotactic responses to hepatocyte growth factor (HGF): first, the number of chemotaxing MSCs and the optimal concentrations of HGF that induced the peak migration varied greatly; second, time-lapse video analysis showed that MSCs in certain differentiation state migrated more efficiently toward HGF; third, the phosphorylation levels of Akt, ERK1/2, SAPK/JNK, and p38MAPK were closely related to the differentiation levels of MSCs subjected to HGF; and finally, although inhibition of ERK1/2 signaling significantly attenuated HGF-stimulated transfilter migration of both undifferentiated and differentiating MSCs, abolishment of PI3K/Akt, p38MAPK, or SAPK/JNK signaling only decreased the number of migrated cells in certain differentiation state(s). Blocking of PI3K/Akt or MAPK signaling impaired the migration efficiency and/or speed, the extent of which depends on the cell differentiation states. Meanwhile, F-actin rearrangement, which is essential for MSCs chemotaxis, was induced by HGF, and the time points of cytoskeletal reorganization were different among these cells. Collectively, these results demonstrate that neural differentiation of MSCs influences their chemotactic responses to HGF: MSCs in varying differentiation states possess different migratory capacities, thereby shedding light on optimization of the therapeutic potential of MSCs to be employed for neural regeneration after injury.
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Affiliation(s)
- Bing Zheng
- Department of Cell Biology, Jiangsu Key Laboratory of Stem Cell Research, Medical College of Soochow University, Suzhou Industrial Park, Suzhou, China
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Park IW, He JJ. HIV-1 Nef-mediated T-cell activation and chemotaxis are decoupled using a HIV-1/SIVpbj1.9. chimeric nef variant. Arch Virol 2012; 158:845-52. [PMID: 23224761 DOI: 10.1007/s00705-012-1560-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 10/17/2012] [Indexed: 01/04/2023]
Abstract
HIV-1 Nef is known to activate CD4+ T cells but inhibit their migration toward SDF-1α. However, it is not clear how this protein orchestrates these two seemingly concomitant events. In this study, by comparing these two activities of HIV-1 Nef with those of its primate counterpart, SIVpbj1.9, we found that HIV-1 Nef activated T cells only in the presence of CD3/ CD28 stimulation, while SIVpbj1.9 Nef did even without CD3/CD28. We also observed that HIV-1 Nef inhibited T-cell chemotaxis toward SDF-1α, while SIVpbj1.9 Nef did not. A hybrid between HIV-1 and SIVpbj1.9 Nef completely abrogated the chemotaxis blockade by HIV-1 Nef while failing to activate T cells without CD3/CD28 co-stimulation. Mutations in the myristoylation and SH3-binding site, but not the basic-rich domain, in Nef were unresponsive to CD3/CD28 stimulation but reversed the inhibition of migration. These findings indicate that the signals for T-cell activation by Nef do not necessarily parallel those for T-cell migration.
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Affiliation(s)
- In-Woo Park
- Department of Cell Biology and Anatomy, Graduate School of Biomedical Sciences, University of North Texas Health Science Center, CBH-316, 3500 Camp Bowie Blvd, Fort Worth, TX 76107, USA.
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Liang SX, Phillips WD. Migration of resident cardiac stem cells in myocardial infarction. Anat Rec (Hoboken) 2012; 296:184-91. [PMID: 23225361 DOI: 10.1002/ar.22633] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Accepted: 10/20/2012] [Indexed: 01/08/2023]
Abstract
Ischemic heart disease is a major cause of morbidity and mortality worldwide. Stem cell-based therapy, which aims to restore cardiac structure and function by regeneration of functional myocardium, has recently been proposed as a novel alternative treatment modality. Resident cardiac stem cells (CSCs) in adult hearts are a key cell type under investigation. CSCs have been shown to be able to repair damaged myocardium and improve myocardial function in both human and animal studies. This approach relies not only on the proliferation of the CSCs, but also upon their migration to the site of injury within the heart. Here, we briefly review reported CSC populations and discuss signaling factors and pathways required for the migration of CSCs.
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Affiliation(s)
- Simon X Liang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Liaoning Medical University, Jinzhou City, Liaoning 121001, People's Republic of China.
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Abstract
OBJECTIVES We have previously shown that stromal cell-derived factor-1α (SDF-1α) is downregulated within diabetic cutaneous wounds, and that direct application of recombinant SDF-1α increases wound closure rates, neovascularization, and endothelial progenitor cell (EPC) recruitment. However, increased wound levels of exogenous SDF-1α results in elevated systemic levels of this proangiogenic chemokine that raises concerns for tumorigenesis and inflammation. We now seek to test the efficacy of a novel, safer cell-based therapy (CBT) employing ex vivo primed bone marrow-derived stem cells (BMDSC) with SDF-1α. We also elucidate the mechanism of action of this new approach for accelerating diabetic wound healing. METHODS Unfractionated BMDSC from diabetic Lepr mice were incubated for 20 hours with SDF-1α (100 ng/mL) or bovine serum albumin (control). Pretreated BMDSC (1 × 10) were injected subcutaneously into full-thickness skin wounds in Lepr mice (n = 8 per group). Wound closure rates, capillary density, and the recruitment of EPC were assessed with serial photography, DiI perfusion, confocal microscopy, and immunohistochemistry. The expression of molecular targets, which may mediate prohealing/proangiogenic effects of SDF-1α-primed BMDSC was evaluated by polymerase chain reaction array and immunoblotting assay. The biological function of a potential mediator was tested in a mouse wound-healing model. Serum SDF-1α levels were measured with enzyme-linked immunosorbent assay (ELISA). RESULTS SDF-1α-primed BMDSC significantly promote wound healing (P < 0.0001), neovascularization (P = 0.0028), and EPC recruitment (P = 0.0059). Gene/protein expression studies demonstrate upregulation of Ephrin Receptor B4 and plasminogen as downstream targets potentially mediating the prohealing and proangiogenic responses. Ex vivo BMDSC activation and the subsequent inoculation of cells into wounds does not increase systemic SDF-1α levels. CONCLUSIONS We report a novel CBT that is highly effective in promoting healing and neovascularization in a murine model of type 2 diabetes. Furthermore, we identify new molecular targets that may be important for advancing the field of wound healing.
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Rankin SM. Chemokines and adult bone marrow stem cells. Immunol Lett 2012; 145:47-54. [PMID: 22698183 DOI: 10.1016/j.imlet.2012.04.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 04/13/2012] [Indexed: 12/15/2022]
Abstract
The adult bone contains a number of distinct populations of stem cells, including haematopoietic stem cells, mesenchymal stem cells, endothelial progenitor cells and fibrocytes. While haematopoietic stem cells are required to provide a lifelong supply of blood cells it is thought that the other populations of stem cells play a role in tissue regeneration and potentially disease. The chemokine CXCL12 is produced constitutively in the bone marrow and, acting via CXCR4, is critical in maintaining HSPCs in a quiescent state and retaining all subsets of stem and progenitor cells in the bone marrow environment. The cytokine G-CSF, used clinically to mobilize haematopoietic stem cells for bone marrow transplants, activates the sympathetic nervous system and bone marrow macrophages to reduce the expression of CXCL12 by bone marrow stromal cells, thereby promoting the exit of haematopoietic stem cells from the bone marrow. Understanding the molecular mechanisms underlying G-CSF stimulated mobilization has led to development of CXCR4 antagonists as fast acting mobilizing agents for haematopoietic stem cells. Evidence now suggests that CXCR4 antagonists can similarly mobilize distinct subsets of progenitor cells, namely the endothelial progenitor cells and mesenchymal stem cells, but this requires conditioning of the bone marrow with VEGF rather than G-CSF.
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Affiliation(s)
- Sara M Rankin
- Leukocyte Biology Section, NHLI Division, Faculty of Medicine, Imperial College London, UK.
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Wang L, Huang J, Jiang M, Lin H, Qi L, Diao H. Activated PTHLH coupling feedback phosphoinositide to G-protein receptor signal-induced cell adhesion network in human hepatocellular carcinoma by systems-theoretic analysis. ScientificWorldJournal 2012; 2012:428979. [PMID: 22997493 PMCID: PMC3444843 DOI: 10.1100/2012/428979] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 07/29/2012] [Indexed: 12/27/2022] Open
Abstract
Studies were done on analysis of biological processes in the same high expression (fold change ≥2) activated PTHLH feedback-mediated cell adhesion gene ontology (GO) network of human hepatocellular carcinoma (HCC) compared with the corresponding low expression activated GO network of no-tumor hepatitis/cirrhotic tissues (HBV or HCV infection). Activated PTHLH feedback-mediated cell adhesion network consisted of anaphase-promoting complex-dependent proteasomal ubiquitin-dependent protein catabolism, cell adhesion, cell differentiation, cell-cell signaling, G-protein-coupled receptor protein signaling pathway, intracellular transport, metabolism, phosphoinositide-mediated signaling, positive regulation of transcription, regulation of cyclin-dependent protein kinase activity, regulation of transcription, signal transduction, transcription, and transport in HCC. We proposed activated PTHLH coupling feedback phosphoinositide to G-protein receptor signal-induced cell adhesion network. Our hypothesis was verified by the different activated PTHLH feedback-mediated cell adhesion GO network of HCC compared with the corresponding inhibited GO network of no-tumor hepatitis/cirrhotic tissues, or the same compared with the corresponding inhibited GO network of HCC. Activated PTHLH coupling feedback phosphoinositide to G-protein receptor signal-induced cell adhesion network included BUB1B, GNG10, PTHR2, GNAZ, RFC4, UBE2C, NRXN3, BAP1, PVRL2, TROAP, and VCAN in HCC from GEO dataset using gene regulatory network inference method and our programming.
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Affiliation(s)
- Lin Wang
- Biomedical Center, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
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Li J, Liu S, Li W, Hu S, Xiong J, Shu X, Hu Q, Zheng Q, Song Z. Vascular smooth muscle cell apoptosis promotes transplant arteriosclerosis through inducing the production of SDF-1α. Am J Transplant 2012; 12:2029-43. [PMID: 22845908 DOI: 10.1111/j.1600-6143.2012.04082.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Transplant arteriosclerosis is a leading cause of late allograft loss. Medial smooth muscle cell (SMC) apoptosis is considered to be an important event in transplant arteriosclerosis. However, the precise contribution of medial SMC apoptosis to transplant arteriosclerosis and the underlying mechanisms remain unclear. We transferred wild-type p53 to induce apoptosis of cultured SMCs. We found that apoptosis induces the production of SDF-1α from apoptotic and neighboring viable cells, resulting in increased SDF-1α in the culture media. Conditioned media from Ltv-p53-transferred SMCs activated PI3K/Akt/mTOR and MAPK/Erk signaling in a SDF-1α-dependent manner and thereby promoted mesenchymal stem cell (MSC) migration and proliferation. In a rat aorta transplantation model, lentivirus-mediated BclxL transfer selectively inhibits medial SMC apoptosis in aortic allografts, resulting in a remarkable decrease of SDF-1α both in allograft media and in blood plasma, associated with diminished recruitment of CD90(+)CD105(+) double-positive cells and impaired neointimal formation. Systemic administration of rapamycin or PD98059 also attenuated MSC recruitment and neointimal formation in the aortic allografts. These results suggest that medial SMC apoptosis is critical for the development of transplant arteriosclerosis through inducing SDF-1α production and that MSC recruitment represents a major component of vascular remodeling, constituting a relevant target and mechanism for therapeutic interventions.
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Affiliation(s)
- J Li
- Division of Liver Transplantation, Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Görgens A, Beckmann J, Ludwig AK, Möllmann M, Dürig J, Horn PA, Rajendran L, Giebel B. Lipid raft redistribution and morphological cell polarization are separable processes providing a basis for hematopoietic stem and progenitor cell migration. Int J Biochem Cell Biol 2012; 44:1121-32. [DOI: 10.1016/j.biocel.2012.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 03/26/2012] [Accepted: 03/27/2012] [Indexed: 10/28/2022]
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