1
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Wright JW, Church KJ, Harding JW. Hepatocyte Growth Factor and Macrophage-stimulating Protein "Hinge" Analogs to Treat Pancreatic Cancer. Curr Cancer Drug Targets 2020; 19:782-795. [PMID: 30914029 DOI: 10.2174/1568009619666190326130008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 03/18/2019] [Accepted: 03/20/2019] [Indexed: 12/20/2022]
Abstract
Pancreatic cancer (PC) ranks twelfth in frequency of diagnosis but is the fourth leading cause of cancer related deaths with a 5 year survival rate of less than 7 percent. This poor prognosis occurs because the early stages of PC are often asymptomatic. Over-expression of several growth factors, most notably vascular endothelial growth factor (VEGF), has been implicated in PC resulting in dysfunctional signal transduction pathways and the facilitation of tumor growth, invasion and metastasis. Hepatocyte growth factor (HGF) acts via the Met receptor and has also received research attention with ongoing efforts to develop treatments to block the Met receptor and its signal transduction pathways. Macrophage-stimulating protein (MSP), and its receptor Ron, is also recognized as important in the etiology of PC but is less well studied. Although the angiotensin II (AngII)/AT1 receptor system is best known for mediating blood pressure and body water/electrolyte balance, it also facilitates tumor vascularization and growth by stimulating the expression of VEGF. A metabolite of AngII, angiotensin IV (AngIV) has sequence homology with the "hinge regions" of HGF and MSP, key structures in the growth factor dimerization processes necessary for Met and Ron receptor activation. We have developed AngIV-based analogs designed to block dimerization of HGF and MSP and thus receptor activation. Norleual has shown promise as tested utilizing PC cell cultures. Results indicate that cell migration, invasion, and pro-survival functions were suppressed by this analog and tumor growth was significantly inhibited in an orthotopic PC mouse model.
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Affiliation(s)
- John W Wright
- Department of Psychology, Washington State University, Pullman, WA, United States.,Department of Integrative Physiology and Neuroscience, and Program in Biotechnology, Washington State University, Pullman, WA, United States
| | - Kevin J Church
- Department of Integrative Physiology and Neuroscience, and Program in Biotechnology, Washington State University, Pullman, WA, United States
| | - Joseph W Harding
- Department of Psychology, Washington State University, Pullman, WA, United States.,Department of Integrative Physiology and Neuroscience, and Program in Biotechnology, Washington State University, Pullman, WA, United States
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2
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Jia Y, Cao N, Zhai J, Zeng Q, Zheng P, Su R, Liao T, Liu J, Pei H, Fan Z, Zhou J, Xi J, He L, Chen L, Nan X, Yue W, Pei X. HGF Mediates Clinical-Grade Human Umbilical Cord-Derived Mesenchymal Stem Cells Improved Functional Recovery in a Senescence-Accelerated Mouse Model of Alzheimer's Disease. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903809. [PMID: 32995116 PMCID: PMC7507104 DOI: 10.1002/advs.201903809] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 06/04/2020] [Indexed: 05/27/2023]
Abstract
Stem cells have emerged as a potential therapy for a range of neural insults, but their application in Alzheimer's disease (AD) is still limited and the mechanisms underlying the cognitive benefits of stem cells remain to be elucidated. Here, the effects of clinical-grade human umbilical cord-derived mesenchymal stem cells (hUC-MSCs) on the recovery of cognitive ability in SAMP8 mice, a senescence-accelerated mouse model of AD is explored. A functional assay identifies that the core functional factor hepatocyte growth factor (HGF) secreted from hUC-MSCs plays critical roles in hUC-MSC-modulated recovery of damaged neural cells by down-regulating hyperphosphorylated tau, reversing spine loss, and promoting synaptic plasticity in an AD cell model. Mechanistically, structural and functional recovery, as well as cognitive enhancements elicited by exposure to hUC-MSCs, are at least partially mediated by HGF in the AD hippocampus through the activation of the cMet-AKT-GSK3β signaling pathway. Taken together, these data strongly implicate HGF in mediating hUC-MSC-induced improvements in functional recovery in AD models.
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Affiliation(s)
- Yali Jia
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- Experimental Hematology and Biochemistry LabBeijing Institute of Radiation MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Ning Cao
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- 920th Hospital of Joint Logistics Support ForceKunming650032China
| | - Jinglei Zhai
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
| | - Quan Zeng
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Pei Zheng
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
| | - Ruyu Su
- South China Institute of BiomedicineGuangzhou510005China
| | - Tuling Liao
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
| | - Jiajing Liu
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
| | - Haiyun Pei
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- Experimental Hematology and Biochemistry LabBeijing Institute of Radiation MedicineBeijing100850China
| | - Zeng Fan
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Junnian Zhou
- Experimental Hematology and Biochemistry LabBeijing Institute of Radiation MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Jiafei Xi
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Lijuan He
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Lin Chen
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Xue Nan
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Wen Yue
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
| | - Xuetao Pei
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineBeijing100850China
- South China Institute of BiomedicineGuangzhou510005China
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3
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Sergi CM. Lower Respiratory Tract. PATHOLOGY OF CHILDHOOD AND ADOLESCENCE 2020:139-253. [DOI: 10.1007/978-3-662-59169-7_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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4
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Volpe G, Bernstock JD, Peruzzotti-Jametti L, Pluchino S. Modulation of host immune responses following non-hematopoietic stem cell transplantation: Translational implications in progressive multiple sclerosis. J Neuroimmunol 2016; 331:11-27. [PMID: 28034466 DOI: 10.1016/j.jneuroim.2016.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/05/2016] [Accepted: 12/12/2016] [Indexed: 12/12/2022]
Abstract
There exists an urgent need for effective treatments for those patients suffering from chronic/progressive multiple sclerosis (MS). Accordingly, it has become readily apparent that different classes of stem cell-based therapies must be explored at both the basic science and clinical levels. Herein, we provide an overview of the basic mechanisms underlying the pre-clinical benefits of exogenously delivered non-hematopoietic stem cells (nHSCs) in animal models of MS. Further, we highlight a number of early clinical trials in which nHSCs have been used to treat MS. Finally, we identify a series of challenges that must be met and ultimately overcome if such promising therapeutics are to be advanced from the bench to the bedside.
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Affiliation(s)
- Giulio Volpe
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, Wellcome Trust-MRC Stem Cell Institute, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK; University of Cambridge, Clifford Allbutt Building - Cambridge Biosciences Campus, Hills Road, CB2 0AH Cambridge, UK.
| | - Joshua D Bernstock
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, Wellcome Trust-MRC Stem Cell Institute, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK; Stroke Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health (NINDS/NIH), Bethesda, MD, USA.
| | - Luca Peruzzotti-Jametti
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, Wellcome Trust-MRC Stem Cell Institute, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK; University of Cambridge, Clifford Allbutt Building - Cambridge Biosciences Campus, Hills Road, CB2 0AH Cambridge, UK.
| | - Stefano Pluchino
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, Wellcome Trust-MRC Stem Cell Institute, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK.
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5
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de Lima KA, de Oliveira GLV, Yaochite JNU, Pinheiro DG, de Azevedo JTC, Silva WA, Covas DT, Couri CEB, Simões BP, Voltarelli JC, Oliveira MC, Malmegrim KCR. Transcriptional profiling reveals intrinsic mRNA alterations in multipotent mesenchymal stromal cells isolated from bone marrow of newly-diagnosed type 1 diabetes patients. Stem Cell Res Ther 2016; 7:92. [PMID: 27406064 PMCID: PMC4942931 DOI: 10.1186/s13287-016-0351-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 04/12/2016] [Accepted: 06/22/2016] [Indexed: 02/07/2023] Open
Abstract
Background Bone marrow multipotent mesenchymal stromal cells (MSCs) are a diverse subset of precursors that contribute to the homeostasis of the hematopoietic niche. MSCs can be isolated and expanded in vitro and have unique immunomodulatory and regenerative properties that make them attractive for the treatment of autoimmune diseases, including type 1 diabetes (T1D). Whether autologous or allogeneic MSCs are more suitable for therapeutic purposes has not yet been established. While autologous MSCs may present abnormal function, allogeneic cells may be recognized and rejected by the host immune system. Thus, studies that investigate biological characteristics of MSCs isolated from T1D patients are essential to guide future clinical applications. Methods Bone marrow-derived MSCs from recently diagnosed type 1 diabetes patients (T1D-MSCs) were compared with those from healthy individuals (C-MSCs) for morphological and immunophenotypic characteristics and for differentiation potential. Bioinformatics approaches allowed us to match absolute and differential gene expression of several adhesion molecules, immune mediators, growth factors, and their receptors involved with hematopoietic support and immunomodulatory properties of MSCs. Finally, the differentially expressed genes were collated for functional pathway enrichment analysis. Results T1D-MSCs and C-MSCs were similar for morphology, immunophenotype, and differentiation potential. Our absolute gene expression results supported previous literature reports, while also detecting new potential molecules related to bone marrow-derived MSC functions. T1D-MSCs showed intrinsic abnormalities in mRNA expression, including the immunomodulatory molecules VCAM-1, CXCL12, HGF, and CCL2. Pathway analyses revealed activation of sympathetic nervous system and JAK STAT signaling in T1D-MSCs. Conclusions Collectively, our results indicate that MSCs isolated from T1D patients present intrinsic transcriptional alterations that may affect their therapeutic potential. However, the implications of these abnormalities in T1D development as well as in the therapeutic efficacy of autologous MSCs require further investigation. Electronic supplementary material The online version of this article (doi:10.1186/s13287-016-0351-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kalil A de Lima
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil. .,Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil. .,, Tenente Catao Roxo, 2501, Monte Alegre, 14051-140, Ribeirao Preto, Sao Paulo, Brazil.
| | - Gislane L V de Oliveira
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Juliana N U Yaochite
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical and Toxicological Analysis, Federal University of Ceará, Fortaleza, Ceara, Brazil
| | - Daniel G Pinheiro
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Júlia T C de Azevedo
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Wilson Araujo Silva
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Dimas T Covas
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Carlos E B Couri
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Belinda P Simões
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Julio C Voltarelli
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Maria C Oliveira
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Kelen C R Malmegrim
- Center for Cell-Based Research, Regional Blood Center of Ribeirao Preto, Ribeirao Preto Medical, University of Sao Paulo, Ribeirao Preto, Brazil.,Department of Clinical, Toxicological and Bromatological Analysis, Faculty of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
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6
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Wang J, Goetsch L, Tucker L, Zhang Q, Gonzalez A, Vaidya KS, Oleksijew A, Boghaert E, Song M, Sokolova I, Pestova E, Anderson M, Pappano WN, Ansell P, Bhathena A, Naumovski L, Corvaia N, Reilly EB. Anti-c-Met monoclonal antibody ABT-700 breaks oncogene addiction in tumors with MET amplification. BMC Cancer 2016; 16:105. [PMID: 26879245 PMCID: PMC4755020 DOI: 10.1186/s12885-016-2138-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/08/2016] [Indexed: 01/21/2023] Open
Abstract
Background c-Met is the receptor tyrosine kinase for hepatocyte growth factor (HGF) encoded by the MET proto-oncogene. Aberrant activation of c-Met resulting from MET amplification and c-Met overexpression is associated with poor clinical outcome in multiple malignancies underscoring the importance of c-Met signaling in cancer progression. Several c-Met inhibitors have advanced to the clinic; however, the development of inhibitory c-Met-directed therapeutic antibodies has been hampered by inherent agonistic activity. Method We generated and tested a bivalent anti-c-Met monoclonal antibody ABT-700 in vitro for binding potency and antagonistic activity and in vivo for antitumor efficacy in human tumor xenografts. Human cancer cell lines and gastric cancer tissue microarrays were examined for MET amplification by fluorescence in situ hybridization (FISH). Results ABT-700 exhibits a distinctive ability to block both HGF-independent constitutive c-Met signaling and HGF-dependent activation of c-Met. Cancer cells addicted to the constitutively activated c-Met signaling driven by MET amplification undergo apoptosis upon exposure to ABT-700. ABT-700 induces tumor regression and tumor growth delay in preclinical tumor models of gastric and lung cancers harboring amplified MET. ABT-700 in combination with chemotherapeutics also shows additive antitumor effect. Amplification of MET in human cancer tissues can be identified by FISH. Conclusions The preclinical attributes of ABT-700 in blocking c-Met signaling, inducing apoptosis and suppressing tumor growth in cancers with amplified MET provide rationale for examining its potential clinical utility for the treatment of cancers harboring MET amplification. Electronic supplementary material The online version of this article (doi:10.1186/s12885-016-2138-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jieyi Wang
- AbbVie, North Chicago, IL, USA. .,AbbVie Biotherapeutics, 1500 Seaport Blvd., Redwood City, CA, 94063, USA.
| | - Liliane Goetsch
- IRPF, Centre d'Immunologie Pierre Fabre 5, Av Napoléon III, F-74164, Saint-Julien-en-Genevois, France.
| | | | | | - Alexandra Gonzalez
- IRPF, Centre d'Immunologie Pierre Fabre 5, Av Napoléon III, F-74164, Saint-Julien-en-Genevois, France.
| | | | | | | | | | | | | | | | | | | | | | - Louie Naumovski
- AbbVie Biotherapeutics, 1500 Seaport Blvd., Redwood City, CA, 94063, USA.
| | - Nathalie Corvaia
- IRPF, Centre d'Immunologie Pierre Fabre 5, Av Napoléon III, F-74164, Saint-Julien-en-Genevois, France.
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7
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Wright JW, Kawas LH, Harding JW. The development of small molecule angiotensin IV analogs to treat Alzheimer's and Parkinson's diseases. Prog Neurobiol 2014; 125:26-46. [PMID: 25455861 DOI: 10.1016/j.pneurobio.2014.11.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 11/17/2014] [Accepted: 11/19/2014] [Indexed: 02/07/2023]
Abstract
Alzheimer's (AD) and Parkinson's (PD) diseases are neurodegenerative diseases presently without effective drug treatments. AD is characterized by general cognitive impairment, difficulties with memory consolidation and retrieval, and with advanced stages episodes of agitation and anger. AD is increasing in frequency as life expectancy increases. Present FDA approved medications do little to slow disease progression and none address the underlying progressive loss of synaptic connections and neurons. New drug design approaches are needed beyond cholinesterase inhibitors and N-methyl-d-aspartate receptor antagonists. Patients with PD experience the symptomatic triad of bradykinesis, tremor-at-rest, and rigidity with the possibility of additional non-motor symptoms including sleep disturbances, depression, dementia, and autonomic nervous system failure. This review summarizes available information regarding the role of the brain renin-angiotensin system (RAS) in learning and memory and motor functions, with particular emphasis on research results suggesting a link between angiotensin IV (AngIV) interacting with the AT4 receptor subtype. Currently there is controversy over the identity of this AT4 receptor protein. Albiston and colleagues have offered convincing evidence that it is the insulin-regulated aminopeptidase (IRAP). Recently members of our laboratory have presented evidence that the brain AngIV/AT4 receptor system coincides with the brain hepatocyte growth factor/c-Met receptor system. In an effort to resolve this issue we have synthesized a number of small molecule AngIV-based compounds that are metabolically stable, penetrate the blood-brain barrier, and facilitate compromised memory and motor systems. These research efforts are described along with details concerning a recently synthesized molecule, Dihexa that shows promise in overcoming memory and motor dysfunctions by augmenting synaptic connectivity via the formation of new functional synapses.
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Affiliation(s)
- John W Wright
- Departments of Psychology, Integrative Physiology and Neuroscience and Program in Biotechnology, Washington State University, Pullman, WA 99164-4820, USA; M3 Biotechnology, Inc., 4000 Mason Rd Suite 300, Box 352141, Seattle, WA 98195-2141, USA.
| | - Leen H Kawas
- Departments of Psychology, Integrative Physiology and Neuroscience and Program in Biotechnology, Washington State University, Pullman, WA 99164-4820, USA; M3 Biotechnology, Inc., 4000 Mason Rd Suite 300, Box 352141, Seattle, WA 98195-2141, USA
| | - Joseph W Harding
- Departments of Psychology, Integrative Physiology and Neuroscience and Program in Biotechnology, Washington State University, Pullman, WA 99164-4820, USA; M3 Biotechnology, Inc., 4000 Mason Rd Suite 300, Box 352141, Seattle, WA 98195-2141, USA
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8
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Hepatocyte growth factor mediates mesenchymal stem cell–induced recovery in multiple sclerosis models. Nat Neurosci 2012; 15:862-70. [PMID: 22610068 PMCID: PMC3427471 DOI: 10.1038/nn.3109] [Citation(s) in RCA: 319] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 04/17/2012] [Indexed: 12/13/2022]
Abstract
Mesenchymal stem cells have emerged as a potential therapy for a range of neural insults. In animal models of multiple sclerosis, an autoimmune disease that targets oligodendrocytes and myelin, treatment with human MSCs results in functional improvement that reflects both modulation of the immune response and myelin repair. Here we demonstrate that conditioned medium (CM) from human MSCs reduces functional deficits in mouse MOG35–55-induced EAE and promotes the development of oligodendrocytes and neurons. Functional assays identify a critical role for Hepatocyte Growth Factor (HGF) and its primary receptor cMet in MSCs stimulated recovery in EAE, neural cell development and remyelination. Active MSC-CM contains HGF and exogenously supplied HGF promotes recovery in EAE while cMet and anti-HGF antibodies block the functional recovery mediated by HGF and MSC-CM. Systemic treatment with HGF dramatically accelerated remyelination in lysolecithin-induced rat dorsal spinal cord lesions and in slice cultures. Together these data strongly implicate HGF in mediating MSC-stimulated functional recovery in animal models of multiple sclerosis.
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9
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Qin L, Bromberg-White JL, Qian CN. Opportunities and challenges in tumor angiogenesis research: back and forth between bench and bed. Adv Cancer Res 2012; 113:191-239. [PMID: 22429856 DOI: 10.1016/b978-0-12-394280-7.00006-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Angiogenesis is essential for tumor growth and metastasis. Many signaling pathways are involved in regulating tumor angiogenesis, with the vascular endothelial growth factor pathway being of particular interest. The recognition of the heterogeneity in tumor vasculature has led to better predictions of prognosis through differential analyses of the vasculature. However, the clinical benefits from antiangiogenic therapy are limited, because many antiangiogenic agents cannot provide long-term survival benefits, suggesting the development of drug resistance. Activation of the hypoxia and c-Met pathways, as well as other proangiogenic factors, has been shown to be responsible for such resistance. Vessel co-option could be another important mechanism. For future development, research to improve the efficacy of antiangiogenic therapy includes (a) using tumor-derived endothelial cells for drug screening; (b) developing the drugs focusing on specific tumor types; (c) developing a better preclinical model for drug study; (d) developing more accurate biomarkers for patient selection; (e) targeting the c-Met pathway or other pathways; and (f) optimizing the dose and schedule of antiangiogenic therapy. In summary, the future of antiangiogenic therapy for cancer patients depends on our efforts to develop the right drugs, select the right patients, and optimize the treatment conditions.
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Affiliation(s)
- Li Qin
- State Key Laboratory on Oncology in South China, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, PR China
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10
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Kawas LH, McCoy AT, Yamamoto BJ, Wright JW, Harding JW. Development of Angiotensin IV Analogs as Hepatocyte Growth Factor/Met Modifiers. J Pharmacol Exp Ther 2011; 340:539-48. [DOI: 10.1124/jpet.111.188136] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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11
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Eathiraj S, Palma R, Volckova E, Hirschi M, France DS, Ashwell MA, Chan TCK. Discovery of a novel mode of protein kinase inhibition characterized by the mechanism of inhibition of human mesenchymal-epithelial transition factor (c-Met) protein autophosphorylation by ARQ 197. J Biol Chem 2011; 286:20666-76. [PMID: 21454604 PMCID: PMC3121448 DOI: 10.1074/jbc.m110.213801] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 03/15/2011] [Indexed: 11/06/2022] Open
Abstract
A number of human malignancies exhibit sustained stimulation, mutation, or gene amplification of the receptor tyrosine kinase human mesenchymal-epithelial transition factor (c-Met). ARQ 197 is a clinically advanced, selective, orally bioavailable, and well tolerated c-Met inhibitor, currently in Phase 3 clinical testing in non-small cell lung cancer patients. Herein, we describe the molecular and structural basis by which ARQ 197 selectively targets c-Met. Through our analysis we reveal a previously undisclosed, novel inhibitory mechanism that utilizes distinct regulatory elements of the c-Met kinase. The structure of ARQ 197 in complex with the c-Met kinase domain shows that the inhibitor binds a conformation that is distinct from published kinase structures. ARQ 197 inhibits c-Met autophosphorylation and is highly selective for the inactive or unphosphorylated form of c-Met. Through our analysis of the interplay between the regulatory and catalytic residues of c-Met, and by comparison between the autoinhibited canonical conformation of c-Met bound by ARQ 197 to previously described kinase domains of type III receptor tyrosine kinases, we believe this to be the basis of a powerful new in silico approach for the design of similar inhibitors for other protein kinases of therapeutic interest.
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Affiliation(s)
| | - Rocio Palma
- From ArQule, Inc., Woburn, Massachusetts 01801
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12
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Timofeevski SL, McTigue MA, Ryan K, Cui J, Zou HY, Zhu JX, Chau F, Alton G, Karlicek S, Christensen JG, Murray BW. Enzymatic characterization of c-Met receptor tyrosine kinase oncogenic mutants and kinetic studies with aminopyridine and triazolopyrazine inhibitors. Biochemistry 2009; 48:5339-49. [PMID: 19459657 DOI: 10.1021/bi900438w] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The c-Met receptor tyrosine kinase (RTK) is a key regulator in cancer, in part, through oncogenic mutations. Eight clinically relevant mutants were characterized by biochemical, biophysical, and cellular methods. The c-Met catalytic domain was highly active in the unphosphorylated state (k(cat) = 1.0 s(-1)) and achieved 160-fold enhanced catalytic efficiency (k(cat)/K(m)) upon activation to 425000 s(-1) M(-1). c-Met mutants had 2-10-fold higher basal enzymatic activity (k(cat)) but achieved maximal activities similar to those of wild-type c-Met, except for Y1235D, which underwent a reduction in maximal activity. Small enhancements of basal activity were shown to have profound effects on the acquisition of full enzymatic activity achieved through accelerating rates of autophosphorylation. Biophysical analysis of c-Met mutants revealed minimal melting temperature differences indicating that the mutations did not alter protein stability. A model of RTK activation is proposed to describe how a RTK response may be matched to a biological context through enzymatic properties. Two c-Met clinical candidates from aminopyridine and triazolopyrazine chemical series (PF-02341066 and PF-04217903) were studied. Biochemically, each series produced molecules that are highly selective against a large panel of kinases, with PF-04217903 (>1000-fold selective relative to 208 kinases) being more selective than PF-02341066. Although these prototype inhibitors have similar potencies against wild-type c-Met (K(i) = 6-7 nM), significant differences in potency were observed for clinically relevant mutations evaluated in both biochemical and cellular contexts. In particular, PF-02341066 was 180-fold more active against the Y1230C mutant c-Met than PF-04217903. These highly optimized inhibitors indicate that for kinases susceptible to active site mutations, inhibitor design may need to balance overall kinase selectivity with the ability to inhibit multiple mutant forms of the kinase (penetrance).
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Affiliation(s)
- Sergei L Timofeevski
- Pfizer Global Research and Development, La Jolla, Pfizer Inc., 10777 Science Center Drive, San Diego, California 92121, USA
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You WK, McDonald DM. The hepatocyte growth factor/c-Met signaling pathway as a therapeutic target to inhibit angiogenesis. BMB Rep 2009; 41:833-9. [PMID: 19123972 DOI: 10.5483/bmbrep.2008.41.12.833] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Angiogenesis in tumors is driven by multiple growth factors that activate receptor tyrosine kinases. An important driving force of angiogenesis in solid tumors is signaling through vascular endothelial growth factor (VEGF) and its receptors (VEGFRs). Angiogenesis inhibitors that target this signaling pathway are now in widespread use for the treatment of cancer. However, when used alone, inhibitors of VEGF/VEGFR signaling do not destroy all blood vessels in tumors and do not slow the growth of most human cancers. VEGF/VEGFR signaling inhibitors are, therefore, used in combination with chemotherapeutic agents or radiation therapy. Additional targets for inhibiting angiogenesis would be useful for more efficacious treatment of cancer. One promising target is the signaling pathway of hepatocyte growth factor (HGF) and its receptor (HGFR, also known as c-Met), which plays important roles in angiogenesis and tumor growth. Inhibitors of this signaling pathway have been shown to inhibit angiogenesis in multiple in vitro and in vivo models. The HGF/c-Met signaling pathway is now recognized as a promising target in cancer by inhibiting angiogenesis, tumor growth, invasion, and metastasis.
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Affiliation(s)
- Weon-Kyoo You
- Department of Anatomy, University of California, San Francisco, California, USA.
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Abstract
Numerous important drugs target cytokines and growth factors or their receptors. Our understanding of the molecular mechanisms governing receptor activation and signaling has lagged in key areas, however, limiting drug discovery efforts to relatively few basic strategies. Recently, substantial progress has been made on several aspects of this problem. These include improved methods for establishing the mechanism of receptor activation, a clearer understanding of the biochemical basis for differential signaling by ligands that act through a common receptor, new methods for measuring the affinities of steps in receptor activation on live cells, and progress toward a systems level understanding of receptor signaling. These advances are providing a new understanding of the function of these receptors that presents opportunities for the development of improved drugs.
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