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Jung YS, Radhakrishnan K, Kim HJ, Kim YH, Lee CH, Choi HS. Macrophage stimulating protein is a novel transcriptional target of estrogen related receptor gamma in alcohol-intoxicated mice. Cell Signal 2024; 116:111059. [PMID: 38237793 DOI: 10.1016/j.cellsig.2024.111059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/27/2023] [Accepted: 01/15/2024] [Indexed: 01/22/2024]
Abstract
Macrophage stimulating protein (MSP) is a multifunctional serum protein produced in the liver, belonging to the plasminogen-related kringle protein family. It exerts diverse biological functions by activating a transmembrane receptor protein-tyrosine kinase known as RON in humans and SKT in mice. MSP plays a pivotal role in innate immunity and is involved in various activities such as cell survival, migration, and phagocytosis. Elucidating the regulatory mechanisms governing MSP gene expression is of great importance. In this study, we comprehensively elucidate the molecular mechanism underlying hepatic MSP gene expression in response to alcoholism. Exposure to ethanol specifically upregulated the expression of ERRγ and MSP in the liver, while not in other organs. Liver-specific knockout of the cannabinoid receptor type 1 (CB1R), an upstream regulator of ERRγ, inhibited the alcohol-induced upregulation of MSP expression. Overexpression of ERRγ alone was sufficient to enhance MSP expression in hepatic cell lines and in mice. Conversely, knockdown of ERRγ in cell lines or liver-specific knockout of ERRγ in mice reversed ethanol-induced MSP gene expression. Promoter studies revealed the direct binding of ERRγ to the MSP gene promoter at the ERR response element (ERRE), resulting in the positive regulation of MSP gene expression in response to alcohol. This finding was further supported by ERRE-mutated MSP-luciferase reporter assays. Notably, treatment with GSK5182, an ERRγ-specific inverse agonist, significantly suppressed alcohol-induced hepatic MSP expression. Collectively, we exposed a novel mechanistic understanding of how alcohol-induced ERRγ controls the transcriptional regulation of MSP gene expression in the liver.
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Affiliation(s)
- Yoon Seok Jung
- Host-Directed Antiviral Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Kamalakannan Radhakrishnan
- Host-Directed Antiviral Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hyo-Jin Kim
- Host-Directed Antiviral Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yong-Hoon Kim
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Chul-Ho Lee
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Hueng-Sik Choi
- Host-Directed Antiviral Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea.
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Hunt BG, Fox LH, Davis JC, Jones A, Lu Z, Waltz SE. An Introduction and Overview of RON Receptor Tyrosine Kinase Signaling. Genes (Basel) 2023; 14:517. [PMID: 36833444 PMCID: PMC9956929 DOI: 10.3390/genes14020517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/07/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
RON is a receptor tyrosine kinase (RTK) of the MET receptor family that is canonically involved in mediating growth and inflammatory signaling. RON is expressed at low levels in a variety of tissues, but its overexpression and activation have been associated with malignancies in multiple tissue types and worse patient outcomes. RON and its ligand HGFL demonstrate cross-talk with other growth receptors and, consequentially, positions RON at the intersection of numerous tumorigenic signaling programs. For this reason, RON is an attractive therapeutic target in cancer research. A better understanding of homeostatic and oncogenic RON activity serves to enhance clinical insights in treating RON-expressing cancers.
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Affiliation(s)
- Brian G. Hunt
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Levi H. Fox
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - James C. Davis
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Angelle Jones
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Zhixin Lu
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Susan E. Waltz
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
- Research Service, Cincinnati Veterans Affairs Hospital Medical Center, Cincinnati, OH 45220, USA
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Podschwadt P, Malyshkina A, Windmann S, Werner T, Hansen W, Bayer W. A detailed analysis of F-MuLV- and SFFV-infected cells in Friend virus-infected mice reveals the contribution of both F-MuLV- and SFFV-infected cells to the interleukin-10 host response. Retrovirology 2022; 19:29. [PMID: 36527061 PMCID: PMC9758943 DOI: 10.1186/s12977-022-00613-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Friend virus (FV) is a complex of the Friend murine leukemia virus (F-MuLV) and the replication-defective, pathogenic spleen focus forming virus (SFFV). In the past, we used a fluorescently labeled F-MuLV to analyze FV target cells. To build on these findings, we have now created a double-labeled FV that contains a Katushka-labeled F-MuLV and an mTagBFP-labeled SFFV, which we have used to study the infection by the two individual viruses in the FV infection of highly susceptible BALB/c mice. RESULTS Our data show that the target cells of SFFV largely mirror those of F-MuLV, with the highest virus loads in erythroblasts, B cells and myeloid cells. The early phase of infection was dominated by cells infected by either SFFV or F-MuLV, whereas double-infected cells became dominant later in the course of infection with increasing viral loads. In the late phase of infection, the frequency of double-infected cells was similarly high as the frequencies of SFFV or F-MuLV single-infected cells, and single- and double-infected cells outnumbered the uninfected cells in the most highly infected cell populations such as erythroblasts. FV and retroviruses in general have been shown to induce interleukin 10 (IL-10) as a means of suppressing immune responses. Interestingly, we found in infected IL-10-eGFP reporter mice that SFFV-infected cells contributed to the IL-10-producing cell pool much more significantly than F-MuLV-infected cells, suggesting that the truncated SFFV envelope protein gp55 might play a role in IL-10 induction. Even though BALB/c mice mount notoriously weak immune responses against FV, infection of mice with an ablation of IL-10 expression in T cells showed transiently lower viral loads and stronger T cell activation, suggesting that IL-10 induction by FV and by SFFV in particular may contribute to a suppressed immune response in BALB/c mice. CONCLUSION Our data provide detailed information about both F-MuLV- and SFFV-infected cells during the course of FV infection in highly susceptible mice and imply that the pathogenic SFFV contributes to immune suppression.
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Affiliation(s)
- Philip Podschwadt
- grid.5718.b0000 0001 2187 5445Institute for Virology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Anna Malyshkina
- grid.5718.b0000 0001 2187 5445Institute for Virology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Sonja Windmann
- grid.5718.b0000 0001 2187 5445Institute for Virology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Tanja Werner
- grid.5718.b0000 0001 2187 5445Institute for Virology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Wiebke Hansen
- grid.5718.b0000 0001 2187 5445Institute for Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Wibke Bayer
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, Essen, Germany.
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4
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Brown NE, Jones A, Hunt BG, Waltz SE. Prostate tumor RON receptor signaling mediates macrophage recruitment to drive androgen deprivation therapy resistance through Gas6-mediated Axl and RON signaling. Prostate 2022; 82:1422-1437. [PMID: 35860905 PMCID: PMC9492645 DOI: 10.1002/pros.24416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/25/2022] [Accepted: 07/05/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Androgen deprivation therapy (ADT), or chemical castration, is the first-line therapy for prostate cancer; however, resistance leaves few treatment options. Prostatic tumor-associated macrophages (TAMs) have been shown to promote prostate cancer growth and are abundant in castration-resistant prostate cancer (CRPC), suggesting a role in promoting CRPC. We recently showed a tumor cell-intrinsic mechanism by which RON promotes CRPC. Given previous reports that RON alters prostate cancer cell chemokine production and RON-overexpressing tumors alter macrophage function, we hypothesized that a macrophage-dependent mechanism regulated by tumor cell intrinsic RON also promotes CRPC. METHODS Using RON-modulated genetically engineered mouse models (GEMMs) and GEMM-derived cell lines and co-cultures with bone marrow-derived macrophages, we show functional and molecular characteristics of signaling pathways in supporting CRPC. Further, we used an unbiased phosphokinase array to identify pathway interactions regulated by RON. Finally, using human prostate cancer cell lines and prostate cancer patient data sets, we show the relevance of our findings to human prostate cancer. RESULTS Studies herein show that macrophages recruited into the prostate tumor microenvironment (TME) serve as a source for Gas6 secretion which serves to further enhance RON and Axl receptor activation in prostate tumor cells thereby driving CRPC. Further, we show targeting RON and macrophages in a murine model promotes CRPC sensitization to ADT. CONCLUSIONS We discovered a novel role for the RON receptor in prostate cancer cells in promoting CRPC through the recruitment of macrophages into the prostate TME. Macrophage-targeting agents in combination with RON/Axl inhibition are likely to provide clinical benefits for patients with CRPC.
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Affiliation(s)
- Nicholas E. Brown
- Department of Cancer BiologyUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | - Angelle Jones
- Department of Cancer BiologyUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | - Brian G. Hunt
- Department of Cancer BiologyUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | - Susan E. Waltz
- Department of Cancer BiologyUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
- Research ServiceCincinnati Veterans Affairs Medical CenterCincinnatiOhioUSA
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Ruiz-Torres SJ, Bourn JR, Benight NM, Hunt BG, Lester C, Waltz SE. Macrophage-mediated RON signaling supports breast cancer growth and progression through modulation of IL-35. Oncogene 2022; 41:321-333. [PMID: 34743208 PMCID: PMC8758553 DOI: 10.1038/s41388-021-02091-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 10/18/2021] [Accepted: 10/21/2021] [Indexed: 01/20/2023]
Abstract
Tumor associated macrophages (TAMs) play a major role in regulating mammary tumor growth and in directing the responses of tumor infiltrating leukocytes in the microenvironment. However, macrophage-specific mechanisms regulating the interactions of macrophages with tumor cells and other leukocytes that support tumor progression have not been extensively studied. In this study, we show that the activation of the RON receptor tyrosine kinase signaling pathway specifically in macrophages supports breast cancer growth and metastasis. Using clinically relevant murine models of breast cancer, we demonstrate that loss of macrophage RON expression results in decreases in mammary tumor cell proliferation, survival, cancer stem cell self-renewal, and metastasis. Macrophage RON signaling modulates these phenotypes via direct effects on the tumor proper and indirectly by regulating leukocyte recruitment including macrophages, T-cells, and B-cells in the mammary tumor microenvironment. We further show that macrophage RON expression regulates the macrophage secretome including IL-35 and other immunosuppressive factors. Overall, our studies implicate activation of RON signaling in macrophages as a key player in supporting a thriving mammary pro-tumor microenvironment through novel mechanisms including the augmentation of tumor cell properties through IL-35.
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Affiliation(s)
- Sasha J. Ruiz-Torres
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Jennifer R. Bourn
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Nancy M. Benight
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Brian G. Hunt
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Carissa Lester
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Susan E. Waltz
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA,Research Service, Cincinnati Veterans Affairs Medical Center, Cincinnati, OH 45267, USA,Address correspondence to: Susan E. Waltz, PhD, Department of Cancer Biology, Vontz Center for Molecular Studies, University of Cincinnati College of Medicine, 3125 Eden Ave, Cincinnati, OH 45267-0521, Tel: 513.558.8675,
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6
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Göblös A, Varga E, Farkas K, Árvai K, Kemény L. Genetic Investigation of Inverse Psoriasis. Life (Basel) 2021; 11:life11070654. [PMID: 34357026 PMCID: PMC8306123 DOI: 10.3390/life11070654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/27/2021] [Accepted: 07/01/2021] [Indexed: 12/03/2022] Open
Abstract
Inverse psoriasis is considered to be a rare variant of plaque-type psoriasis and is associated with significantly impaired quality of life. Clinical manifestations and treatment options are somewhat different for each subtype. Identifying genetic variants that contribute to the susceptibility of different types of psoriasis might improve understanding of the etiology of the disease. Since we have no current knowledge about the genetic background of inverse psoriasis, whole exome sequencing was used to comprehensively assess genetic variations in five patients with exclusively inverse lesions. We detected six potentially pathogenic rare (MAF < 0.01) sequence variants that occurred in all investigated patients. The corresponding mutated genes were FN1, FBLN1, MYH7B, MST1R, RHOD, and SCN10A. Several mutations identified in this study are known to cause disease, but roles in psoriasis or other papulosquamous diseases have not previously been reported. Interestingly, potentially causative variants of established psoriasis-susceptibility genes were not identified. These outcomes are in agreement with our hypothesis that the inverse subtype is a different entity from plaque-type psoriasis.
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Affiliation(s)
- Anikó Göblös
- MTA-SZTE Dermatological Research Group, Eötvös Loránd Research Network, 6720 Szeged, Hungary;
- Correspondence: ; Tel.: +36-205-541-692
| | - Emese Varga
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary;
| | - Katalin Farkas
- Department of Medical Genetics, University of Szeged, 6720 Szeged, Hungary;
| | | | - Lajos Kemény
- MTA-SZTE Dermatological Research Group, Eötvös Loránd Research Network, 6720 Szeged, Hungary;
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary;
- HCEMM-USZ Skin Research Group, University of Szeged, 6720 Szeged, Hungary
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7
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Huang L, Fang X, Zhang X, Wu W, Yao H, Fang Q. RON Expression Mediates Lipopolysaccharide-Mediated Dendritic Cell Maturation via March-I. Front Cell Infect Microbiol 2021; 10:606340. [PMID: 33537243 PMCID: PMC7848161 DOI: 10.3389/fcimb.2020.606340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Abstract
The macrophage stimulating protein (MSP)-Recepteur d'origine nantais (RON) signaling pathway regulates macrophage function. Here, we verified RON receptor expression in bone marrow-derived dendritic cells (BMDCs) by real time-PCR, Western blot, and flow cytometry. Flow cytometry was used to detect the changes in MHC II and CD86 expression following the inhibition of RON in BMDCs and splenic dendritic cells (DCs). Immunoprecipitation and Western blot were used to detect the level of MHC II and CD86 ubiquitination. An enzyme-linked immunosorbent assay was used to detect cytokine release, and a mixed lymphocyte reaction was performed to evaluate DC maturity. The results show that the inhibition of RON leads to an increase in March-1 transcription, which intensifies the ubiquitination of MHC II and CD86 and ultimately leads to a decreased level of these two molecules. The mixed lymphocyte reaction provided evidence that RON inhibition decreased the ability of DCs to promote the proliferation of T cells. The MSP-RON signaling pathway may play an important role in lipopolysaccharide (LPS)-stimulated DC maturation through March-I and may protect DC differentiation following LPS stimulation.
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Affiliation(s)
- Lingtong Huang
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Xueling Fang
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Xuan Zhang
- State Key Laboratory for Diagnosis & Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China.,Department of Infectious Disease, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Weifang Wu
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Hangping Yao
- State Key Laboratory for Diagnosis & Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China
| | - Qiang Fang
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, China
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8
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Huang L, Fang X, Shi D, Yao S, Wu W, Fang Q, Yao H. MSP-RON Pathway: Potential Regulator of Inflammation and Innate Immunity. Front Immunol 2020; 11:569082. [PMID: 33117355 PMCID: PMC7577085 DOI: 10.3389/fimmu.2020.569082] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/27/2020] [Indexed: 12/17/2022] Open
Abstract
Macrophage-stimulating protein (MSP), a soluble protein mainly synthesized by the liver, is the only known ligand for recepteur d'origine nantais (RON), which is a member of the MET proto-oncogene family. Recent studies show that the MSP-RON signaling pathway not only was important in tumor behavior but also participates in the occurrence or development of many immune system diseases. Activation of RON in macrophages results in the inhibition of nitric oxide synthesis as well as lipopolysaccharide (LPS)-induced inflammatory response. MSP-RON is also associated with chronic inflammatory responses, especially chronic liver inflammation, and might serve as a novel regulator of inflammation, which may affect the metabolism in the body. Another study provided evidence of the relationship between MSP-RON and autoimmune diseases, suggesting a potential role for MSP-RON in the development of drugs for autoimmune diseases. Moreover, MSP-RON plays an important role in maintaining the stability of the tissue microenvironment and contributes to immune escape in the tumor immune microenvironment. Here, we summarize the role of MSP-RON in immunity, based on recent findings, and lay the foundation for further research.
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Affiliation(s)
- Lingtong Huang
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xueling Fang
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Danrong Shi
- State Key Laboratory for Diagnosis & Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shuhao Yao
- Department of Stormotologry, Wenzhou Medical University Renji College, Wenzhou, China
| | - Weifang Wu
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiang Fang
- Department of Critical Care Units, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hangping Yao
- State Key Laboratory for Diagnosis & Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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9
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A Novel S100A8/A9 Induced Fingerprint of Mesenchymal Stem Cells associated with Enhanced Wound Healing. Sci Rep 2018; 8:6205. [PMID: 29670130 PMCID: PMC5906602 DOI: 10.1038/s41598-018-24425-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 04/03/2018] [Indexed: 12/28/2022] Open
Abstract
We here investigated whether the unique capacity of mesenchymal stem cells (MSCs) to re-establish tissue homeostasis depends on their potential to sense danger associated molecular pattern (DAMP) and to mount an adaptive response in the interest of tissue repair. Unexpectedly, after injection of MSCs which had been pretreated with the calcium-binding DAMP protein S100A8/A9 into murine full-thickness wounds, we observed a significant acceleration of healing even exceeding that of non-treated MSCs. This correlates with a fundamental reprogramming of the transcriptome in S100A8/A9 treated MSCs as deduced from RNA-seq analysis and its validation. A network of genes involved in proteolysis, macrophage phagocytosis, and inflammation control profoundly contribute to the clean-up of the wound site. In parallel, miR582-5p and genes boosting energy and encoding specific extracellular matrix proteins are reminiscent of scar-reduced tissue repair. This unprecedented finding holds substantial promise to refine current MSC-based therapies for difficult-to-treat wounds and fibrotic conditions.
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10
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Faham N, Welm AL. RON Signaling Is a Key Mediator of Tumor Progression in Many Human Cancers. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 2017; 81:177-188. [PMID: 28057847 DOI: 10.1101/sqb.2016.81.031377] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
With an increasing body of literature covering RON receptor tyrosine kinase function in different types of human cancers, it is becoming clear that RON has prominent roles in both cancer cells and in the tumor-associated microenvironment. RON not only activates several oncogenic signaling pathways in cancer cells, leading to more aggressive behavior, but also promotes an immunosuppressive, alternatively activated phenotype in macrophages and limits the antitumor immune response. These two unique functions of this oncogene, the strong correlation between RON expression and poor outcomes in cancer, and the high tolerability of a new RON inhibitor make it an exciting therapeutic target, the blocking of which offers an advantage toward improving the survival of cancer patients. Here, we discuss recent findings on the role of RON signaling in cancer progression and its potential in cancer therapy.
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Affiliation(s)
- Najme Faham
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah 84112
| | - Alana L Welm
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah 84112
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11
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Han Z, Harris PKW, Karmakar P, Kim T, Owusu BY, Wildman SA, Klampfer L, Janetka JW. α-Ketobenzothiazole Serine Protease Inhibitors of Aberrant HGF/c-MET and MSP/RON Kinase Pathway Signaling in Cancer. ChemMedChem 2016; 11:585-99. [PMID: 26889658 DOI: 10.1002/cmdc.201500600] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Indexed: 12/20/2022]
Abstract
Upregulation of the HGF and MSP growth-factor processing serine endopeptidases HGFA, matriptase and hepsin is correlated with increased metastasis in multiple tumor types driven by c-MET or RON kinase signaling. We rationally designed P1' α-ketobenzothiazole mechanism-based inhibitors of these proteases. Structure-activity studies are presented, which resulted in the identification of potent inhibitors with differential selectivity. The tetrapeptide inhibitors span the P1-P1' substrate cleavage site via a P1' amide linker off the benzothiazole, occupying the S3' pocket. Optimized inhibitors display sub-nanomolar enzyme inhibition against one, two, or all three of HGFA, matriptase, and hepsin. Several compounds also have good selectivity against the related trypsin-like proteases, thrombin and Factor Xa. Finally, we show that inhibitors block the fibroblast (HGF)-mediated migration of invasive DU145 prostate cancer cells. In addition to prostate cancer, breast, colon, lung, pancreas, gliomas, and multiple myeloma tumors all depend on HGF and MSP for tumor survival and progression. Therefore, these unique inhibitors have potential as new therapeutics for a diverse set of tumor types.
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Affiliation(s)
- Zhenfu Han
- Department of Biochemistry and Molecular Biophysics, Alvin J. Siteman Cancer Center, Washington University School of Medicine, 660 S. Euclid Ave., Saint Louis, MO, 63110, USA
| | - Peter K W Harris
- Department of Biochemistry and Molecular Biophysics, Alvin J. Siteman Cancer Center, Washington University School of Medicine, 660 S. Euclid Ave., Saint Louis, MO, 63110, USA
| | - Partha Karmakar
- Department of Biochemistry and Molecular Biophysics, Alvin J. Siteman Cancer Center, Washington University School of Medicine, 660 S. Euclid Ave., Saint Louis, MO, 63110, USA
| | - Tommy Kim
- Department of Biochemistry and Molecular Biophysics, Alvin J. Siteman Cancer Center, Washington University School of Medicine, 660 S. Euclid Ave., Saint Louis, MO, 63110, USA
| | - Ben Y Owusu
- Department of Oncology, Southern Research Institute, 2000 9th Ave., Birmingham, AL, 35205, USA
| | - Scott A Wildman
- Department of Biochemistry and Molecular Biophysics, Alvin J. Siteman Cancer Center, Washington University School of Medicine, 660 S. Euclid Ave., Saint Louis, MO, 63110, USA.,Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin, Madison, WI, 53792, USA
| | - Lidija Klampfer
- Department of Oncology, Southern Research Institute, 2000 9th Ave., Birmingham, AL, 35205, USA
| | - James W Janetka
- Department of Biochemistry and Molecular Biophysics, Alvin J. Siteman Cancer Center, Washington University School of Medicine, 660 S. Euclid Ave., Saint Louis, MO, 63110, USA.
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12
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Bittner GD, Sengelaub DR, Trevino RC, Peduzzi JD, Mikesh M, Ghergherehchi CL, Schallert T, Thayer WP. The curious ability of polyethylene glycol fusion technologies to restore lost behaviors after nerve severance. J Neurosci Res 2015; 94:207-30. [PMID: 26525605 DOI: 10.1002/jnr.23685] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 09/17/2015] [Accepted: 10/12/2015] [Indexed: 01/09/2023]
Abstract
Traumatic injuries to PNS and CNS axons are not uncommon. Restoration of lost behaviors following severance of mammalian peripheral nerve axons (PNAs) relies on regeneration by slow outgrowths and is typically poor or nonexistent when after ablation or injuries close to the soma. Behavioral recovery after severing spinal tract axons (STAs) is poor because STAs do not naturally regenerate. Current techniques to enhance PNA and/or STA regeneration have had limited success and do not prevent the onset of Wallerian degeneration of severed distal segments. This Review describes the use of a recently developed polyethylene glycol (PEG) fusion technology combining concepts from biochemical engineering, cell biology, and clinical microsurgery. Within minutes after microsuturing carefully trimmed cut ends and applying a well-specified sequence of solutions, PEG-fused axons exhibit morphological continuity (assessed by intra-axonal dye diffusion) and electrophysiological continuity (assessed by conduction of action potentials) across the lesion site. Wallerian degeneration of PEG-fused PNAs is greatly reduced as measured by counts of sensory and/or motor axons and maintenance of axonal diameters and neuromuscular synapses. After PEG-fusion repair, cut-severed, crush-severed, or ablated PNAs or crush-severed STAs rapidly (within days to weeks), more completely, and permanently restore PNA- or STA-mediated behaviors compared with nontreated or conventionally treated animals. PEG-fusion success is enhanced or decreased by applying antioxidants or oxidants, trimming cut ends or stretching axons, and exposure to Ca(2+) -free or Ca(2+) -containing solutions, respectively. PEG-fusion technology employs surgical techniques and chemicals already used by clinicians and has the potential to produce a paradigm shift in the treatment of traumatic injuries to PNAs and STAs.
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Affiliation(s)
- G D Bittner
- Department of Neuroscience, University of Texas at Austin, Austin, Texas
| | - D R Sengelaub
- Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana
| | - R C Trevino
- Department of Orthopedic Surgery, Wellspan Health, York, Pennsylvania
| | - J D Peduzzi
- Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, Michigan
| | - M Mikesh
- Department of Neuroscience, University of Texas at Austin, Austin, Texas
| | - C L Ghergherehchi
- Department of Neuroscience, University of Texas at Austin, Austin, Texas
| | - T Schallert
- Department of Psychology, University of Texas at Austin, Austin, Texas
| | - W P Thayer
- Department of Plastic Surgery, Vanderbilt School of Medicine, Nashville, Tennessee
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13
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Glasbey JC, Sanders AJ, Bosanquet DC, Ruge F, Harding KG, Jiang WG. Expression of Hepatocyte Growth Factor-Like Protein in Human Wound Tissue and Its Biological Functionality in Human Keratinocytes. Biomedicines 2015; 3:110-123. [PMID: 28536402 PMCID: PMC5344237 DOI: 10.3390/biomedicines3010110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 09/29/2014] [Accepted: 01/27/2015] [Indexed: 01/04/2023] Open
Abstract
human keratinocyte model, may indicate a role for HGFl in active wound healing.
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Affiliation(s)
- James C Glasbey
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University-Peking University Cancer Institute, Cardiff University-Capital Medical University Joint Centre Biomedical Research, Cardiff University School of Medicine, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK.
- Department of Wound Healing and Welsh Wound Innovation Centre, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| | - Andrew J Sanders
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University-Peking University Cancer Institute, Cardiff University-Capital Medical University Joint Centre Biomedical Research, Cardiff University School of Medicine, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK.
| | - David C Bosanquet
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University-Peking University Cancer Institute, Cardiff University-Capital Medical University Joint Centre Biomedical Research, Cardiff University School of Medicine, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK.
- Department of Wound Healing and Welsh Wound Innovation Centre, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| | - Fiona Ruge
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University-Peking University Cancer Institute, Cardiff University-Capital Medical University Joint Centre Biomedical Research, Cardiff University School of Medicine, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK.
- Department of Wound Healing and Welsh Wound Innovation Centre, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| | - Keith G Harding
- Department of Wound Healing and Welsh Wound Innovation Centre, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| | - Wen G Jiang
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University-Peking University Cancer Institute, Cardiff University-Capital Medical University Joint Centre Biomedical Research, Cardiff University School of Medicine, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK.
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14
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Zhao J, Hu L, Gong N, Tang Q, Du L, Chen L. The effects of macrophage-stimulating protein on the migration, proliferation, and collagen synthesis of skin fibroblasts in vitro and in vivo. Tissue Eng Part A 2015; 21:982-91. [PMID: 25315688 DOI: 10.1089/ten.tea.2013.0726] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Macrophage-stimulating protein (MSP), an important cytokine with multiple functions, is highly expressed in adipose-derived stem cells-conditioned medium (ASC-CM). ASCs can effectively promote wound healing through paracrine mechanism, suggesting that MSP may play a critical role in wound healing. Through binding to its receptor, RON (Receptuerd'OrigineNantaise, also called macrophage stimulation 1 receptor; MST1R), it can activate epithelial cells and work as an inflammatory mediator. In this study, we found RON was also expressed on dermal fibroblasts and investigated the effects of MSP on proliferation, migration, and collagen synthesis of fibroblasts. With the treatment of different concentrations of MSP (0, 1, 10, 20, 50, and 100 ng/mL) on fibroblasts, proliferation, migration, and collagen synthesis were analyzed by Cell Counting Kit-8 (CCK-8), transwell and real-time polymerase chain reaction. Under the treatment of MSP, the migration, Collagen I, III synthesis, and matrix metalloproteinase-1 (MMP-1) mRNA expression of fibroblasts were upregulated significantly, although there was no effect on fibroblasts proliferation, and the optimal concentration of MSP for migration and collagen synthesis was 10 ng/mL. In the in vivo study, 10 ng/mL MSP was applied to full-thickness skin wound with bacterial cellulose membranes, and this treatment could accelerate the wound healing rate and increased the collagen synthesis of wound sites. This study suggested that MSP appears to promote the migration of fibroblasts, enhances collagen synthesis and remodeling, and effectively improves wound healing.
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Affiliation(s)
- Jiajia Zhao
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
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15
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Li J, Chanda D, Shiri-Sverdlov R, Neumann D. MSP: an emerging player in metabolic syndrome. Cytokine Growth Factor Rev 2014; 26:75-82. [PMID: 25466635 DOI: 10.1016/j.cytogfr.2014.10.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 10/22/2014] [Indexed: 12/15/2022]
Abstract
MSP (Macrophage Stimulating Protein; also known as Hepatocyte Growth Factor-like protein (HGFL) and MST1) is a secreted protein and the ligand for transmembrane receptor tyrosine kinase Recepteur d'Origine Nantais (RON; also known as MST1R). Since its discovery, MSP has been demonstrated to play a key role in regulating inflammation in the peripheral tissues of multiple disease models. Recent evidences also point toward a beneficial role of MSP in the regulation of hepatic lipid and glucose metabolism, thereby implicating MSP as a crucial regulator in maintaining metabolic homeostasis while simultaneously suppressing inflammatory processes. In this review, we discuss the recent advances that demonstrate the significance of MSP in metabolic syndrome and build a strong case supporting its therapeutic potential.
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Affiliation(s)
- Jieyi Li
- Department of Molecular Genetics, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Dipanjan Chanda
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, 6200 MD Maastricht, The Netherlands.
| | - Ronit Shiri-Sverdlov
- Department of Molecular Genetics, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Dietbert Neumann
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, 6200 MD Maastricht, The Netherlands
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16
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Gurusamy D, Ruiz-Torres SJ, Johnson AL, Smith DA, Waltz SE. Hepatocyte growth factor-like protein is a positive regulator of early mammary gland ductal morphogenesis. Mech Dev 2014; 133:11-22. [PMID: 25049204 DOI: 10.1016/j.mod.2014.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 05/15/2014] [Accepted: 07/08/2014] [Indexed: 12/15/2022]
Abstract
The Ron receptor tyrosine kinase regulates multiple cellular processes and is important during mammary gland development and tumor progression. Hepatocyte growth factor-like protein [HGFL] is the only known ligand for the Ron receptor and recent studies have identified major roles for HGFL during breast cancer metastasis. Understanding the functional importance HGFL during mammary gland development will provide significant insights onto its contribution during tumor development and metastasis. In this study, we assessed the role of HGFL during postnatal mammary gland development using mice that were either proficient [HGFL +/+] or deficient [HGFL-/-] for HGFL. Postnatal ductal morphology and stromal cell associations were analyzed at multiple time points through puberty until adulthood. HGFL deficiency resulted in several mammary gland developmental defects including smaller terminal end buds [TEBs], significantly fewer TEBs, and delayed ductal outgrowth during early puberty. Additionally, HGFL deficient animals exhibited significantly altered TEB epithelial cell turnover with decreased proliferation and increased apoptosis coupled with decreased TEB diameter. Macrophage recruitment to the TEBs was also significantly decreased in the HGFL-/- mice compared to controls. Moreover, the levels of STAT3 mRNA as well as the phosphorylation status of this protein were lower in the HGFL-/- mammary glands compared to controls. Taken together, our data provide the first evidence for HGFL as a positive regulator of mammary gland ductal morphogenesis by controlling overall epithelial cell turnover, macrophage recruitment, and STAT3 activation in the developing mammary gland. With a function in early mammary gland development, HGFL represents a potential target for the development of novel breast cancer therapies.
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Affiliation(s)
- Devikala Gurusamy
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Sasha J Ruiz-Torres
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Abby L Johnson
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Dana A Smith
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA
| | - Susan E Waltz
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0521, USA; Research Service, Cincinnati Veterans Hospital Medical Center, Cincinnati, OH 45267-0521, USA.
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17
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Kulkarni RM, Stuart WD, Gurusamy D, Waltz SE. Ron receptor signaling is protective against DSS-induced colitis in mice. Am J Physiol Gastrointest Liver Physiol 2014; 306:G1065-74. [PMID: 24742989 PMCID: PMC4059975 DOI: 10.1152/ajpgi.00421.2013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Inflammatory bowel diseases (IBD) are chronic inflammatory disorders of the intestine that result in painful and debilitating complications. Currently no cure exists for IBD, and treatments are primarily aimed at reducing inflammation to alleviate symptoms. Genome-wide linkage studies have identified the Ron receptor tyrosine kinase (TK) and its ligand, hepatocyte growth factor-like protein (HGFL), as genes highly associated with IBD. However, only scant information exists on the role of Ron or HGFL in IBD. Based on the linkage of Ron to IBD, we directly examined the biological role of Ron in colitis. Wild-type mice and mice lacking the TK signaling domain of Ron (TK-/- mice) were utilized in a well-characterized model of chronic colitis induced by cyclic exposure to dextran sulfate sodium. In this model, TK-/- mice were more susceptible to injury as judged by increased mortality compared with control mice and developed more severe colitis. Loss of Ron led to significantly reduced body weights and more aggressive clinical and histopathologies. Ron loss also resulted in a dramatic reduction in colonic epithelial cell proliferation and increased proinflammatory cytokine production, which was associated with alterations in important signaling pathways known to regulate IBD. Examination of human gene expression data further supports the contention that loss of Ron signaling is associated with IBD. In total, our studies point to important functional roles for Ron in IBD by regulating healing of the colonic epithelium and by controlling cytokine secretion.
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Affiliation(s)
| | - William D. Stuart
- 1Department of Cancer Biology, University of Cincinnati, Cincinnati, Ohio; and
| | - Devikala Gurusamy
- 1Department of Cancer Biology, University of Cincinnati, Cincinnati, Ohio; and
| | - Susan E. Waltz
- 1Department of Cancer Biology, University of Cincinnati, Cincinnati, Ohio; and ,2Department of Research, Cincinnati Veterans Affairs Medical Center, Cincinnati, Ohio
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18
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Kauder SE, Santell L, Mai E, Wright LY, Luis E, N'Diaye EN, Lutman J, Ratti N, Sa SM, Maun HR, Stefanich E, Gonzalez LC, Graham RR, Diehl L, Faubion WA, Keir ME, Young J, Chaudhuri A, Lazarus RA, Egen JG. Functional consequences of the macrophage stimulating protein 689C inflammatory bowel disease risk allele. PLoS One 2013; 8:e83958. [PMID: 24409221 PMCID: PMC3884107 DOI: 10.1371/journal.pone.0083958] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 11/09/2013] [Indexed: 12/19/2022] Open
Abstract
Background Macrophage stimulating protein (MSP) is a serum growth factor that binds to and activates the receptor tyrosine kinase, Recepteur d'Origine Nantais (RON). A non-synonymous coding variant in MSP (689C) has been associated with genetic susceptibility to both Crohn's disease and ulcerative colitis, two major types of inflammatory bowel disease (IBD) characterized by chronic inflammation of the digestive tract. We investigated the consequences of this polymorphism for MSP-RON pathway activity and IBD pathogenesis. Methods RON expression patterns were examined on mouse and human cells and tissues under normal and disease conditions to identify cell types regulated by MSP-RON. Recombinant MSP variants were tested for their ability to bind and stimulate RON and undergo proteolytic activation. MSP concentrations were quantified in the serum of individuals carrying the MSP 689R and 689C alleles. Results In intestinal tissue, RON was primarily expressed by epithelial cells under normal and disease conditions. The 689C polymorphism had no impact on the ability of MSP to bind to or signal through RON. In a cohort of normal individuals and IBD patients, carriers of the 689C polymorphism had lower concentrations of MSP in their serum. Conclusions By reducing the quantities of circulating MSP, the 689C polymorphism, or a variant in linkage disequilibrium with this polymorphism, may impact RON ligand availability and thus receptor activity. Given the known functions of RON in regulating wound healing and our analysis of RON expression patterns in human intestinal tissue, these data suggest that decreased RON activity may impact the efficiency of epithelial repair and thus underlie the increased IBD susceptibility associated with the MSP 689C allele.
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Affiliation(s)
- Steven E. Kauder
- Discovery Immunology, Genentech Inc., South San Francisco, California, United States of America
| | - Lydia Santell
- Early Discovery Biochemistry, Genentech Inc., South San Francisco, California, United States of America
| | - Elaine Mai
- Biochemical and Cellular Pharmacology, Genentech Inc., South San Francisco, California, United States of America
| | - Lilyan Y. Wright
- Immunology, Tissue Growth and Repair- Diagnostics Discovery, Genentech Inc., South San Francisco, California, United States of America
| | - Elizabeth Luis
- Protein Chemistry, Genentech Inc., South San Francisco, California, United States of America
| | - Elsa N. N'Diaye
- Discovery Immunology, Genentech Inc., South San Francisco, California, United States of America
| | - Jeff Lutman
- Pharmacokinetics and Pharmacodynamics, Genentech Inc., South San Francisco, California, United States of America
| | - Navneet Ratti
- Pathology, Genentech Inc., South San Francisco, California, United States of America
| | - Susan M. Sa
- Pathology, Genentech Inc., South San Francisco, California, United States of America
| | - Henry R. Maun
- Early Discovery Biochemistry, Genentech Inc., South San Francisco, California, United States of America
| | - Eric Stefanich
- Pharmacokinetics and Pharmacodynamics, Genentech Inc., South San Francisco, California, United States of America
| | - Lino C. Gonzalez
- Protein Chemistry, Genentech Inc., South San Francisco, California, United States of America
| | - Robert R. Graham
- Immunology, Tissue Growth and Repair -Human Genetics, Genentech Inc., South San Francisco, California, United States of America
| | - Lauri Diehl
- Pathology, Genentech Inc., South San Francisco, California, United States of America
| | - William A. Faubion
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Mary E. Keir
- Immunology, Tissue Growth and Repair- Diagnostics Discovery, Genentech Inc., South San Francisco, California, United States of America
| | - Judy Young
- Biochemical and Cellular Pharmacology, Genentech Inc., South San Francisco, California, United States of America
| | - Amitabha Chaudhuri
- Molecular Oncology, Genentech Inc., South San Francisco, California, United States of America
| | - Robert A. Lazarus
- Early Discovery Biochemistry, Genentech Inc., South San Francisco, California, United States of America
| | - Jackson G. Egen
- Discovery Immunology, Genentech Inc., South San Francisco, California, United States of America
- * E-mail:
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19
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Cary DC, Clements JE, Henderson AJ. RON receptor tyrosine kinase, a negative regulator of inflammation, is decreased during simian immunodeficiency virus-associated central nervous system disease. THE JOURNAL OF IMMUNOLOGY 2013; 191:4280-7. [PMID: 24043899 DOI: 10.4049/jimmunol.1300797] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Expressed on tissue-resident macrophages, the receptor tyrosine kinase, recepteur d'orgine nantais (RON), functions to maintain inflammation homeostasis by activating genes that promote wound repair and resolve inflammation while repressing genes that perpetuate tissue damage and cell death. Chronic HIV-1 infection is associated with dysregulated inflammation, and we hypothesize that diminished RON expression contributes to the development of end organ diseases such as HIV-1-associated CNS disease. To explore RON function in vivo, we used CNS tissue from a well-characterized SIV macaque model and examined the temporal regulation of RON in the brain during the course of infection. Following prolonged SIV infection, RON expression was inversely correlated with the development of CNS disease; RON was maintained in animals that did not develop CNS lesions and was reduced in SIV-infected macaques that demonstrated moderate to severe inflammatory lesions. Arginase-1 expression was reduced in the brain during late infection, whereas expression of the inflammatory genes, IL-12p40 and TNF-α, was elevated. To validate a role for RON in regulating HIV-1 in primary cells, we used human tissue-resident macrophages isolated from tonsil as a tractable cell model. RON signaling in tissue-resident macrophages, both ligand dependent and independent, limited HIV-1 replication. Furthermore, prolonged HIV-1 infection in vitro resulted in downregulation of RON. We propose a model in which, following chronic HIV-1 infection in the brain, RON expression is decreased, genes that quell inflammation are repressed, and inflammatory mediators are induced to promote tissue inflammation.
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Affiliation(s)
- Daniele C Cary
- Department of Microbiology, Boston University School of Medicine, Boston, MA 02118
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20
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Eyob H, Ekiz HA, Derose YS, Waltz SE, Williams MA, Welm AL. Inhibition of ron kinase blocks conversion of micrometastases to overt metastases by boosting antitumor immunity. Cancer Discov 2013; 3:751-60. [PMID: 23612011 DOI: 10.1158/2159-8290.cd-12-0480] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Many "nonmetastatic" cancers have spawned undetectable metastases before diagnosis. Eventual outgrowth of these microscopic lesions causes metastatic relapse and death, yet the events that dictate when and how micrometastases convert to overt metastases are largely unknown. We report that macrophage-stimulating protein and its receptor, Ron, are key mediators in conversion of micrometastases to bona fide metastatic lesions through immune suppression. Genetic deletion of Ron tyrosine kinase activity specifically in the host profoundly blocked metastasis. Our data show that loss of Ron function promotes an effective antitumor CD8(+) T-cell response, which specifically inhibits outgrowth of seeded metastatic colonies. Treatment of mice with a Ron-selective kinase inhibitor prevented outgrowth of lung metastasis, even when administered after micrometastatic colonies had already been established. Our findings indicate that Ron inhibitors may hold potential to specifically prevent outgrowth of micrometastases in patients with cancer in the adjuvant setting.
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Affiliation(s)
- Henok Eyob
- Department of Oncological Sciences, Huntsman Cancer Institute, Salt Lake City, UT 84112, USA
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21
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Gurusamy D, Gray JK, Pathrose P, Kulkarni RM, Finkleman FD, Waltz SE. Myeloid-specific expression of Ron receptor kinase promotes prostate tumor growth. Cancer Res 2013; 73:1752-63. [PMID: 23328584 DOI: 10.1158/0008-5472.can-12-2474] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ron receptor kinase (MST1R) is important in promoting epithelial tumorigenesis, but the potential contributions of its specific expression in stromal cells have not been examined. Herein, we show that the Ron receptor is expressed in mouse and human stromal cells of the prostate tumor microenvironment. To test the significance of stromal Ron expression, prostate cancer cells were orthotopically implanted into the prostates of either wild-type or Ron tyrosine kinase deficient (TK(-/-); Mst1r(-/-)) hosts. In TK(-/-) hosts, prostate cancer cell growth was significantly reduced as compared with tumor growth in TK(+/+) hosts. Prostate tumors in TK(-/-) hosts exhibited an increase in tumor cell apoptosis, macrophage infiltration and altered cytokine expression. Reciprocal bone marrow transplantation studies and myeloid cell-specific ablation of Ron showed that loss of Ron in myeloid cells is sufficient to inhibit prostate cancer cell growth. Interestingly, depletion of CD8(+) T cells, but not CD4(+) T cells, was able to restore prostate tumor growth in hosts devoid of myeloid-specific Ron expression. These studies show a critical role for the Ron receptor in the tumor microenvironment, whereby Ron loss in tumor-associated macrophages inhibits prostate cancer cell growth, at least in part, by derepressing the activity of CD8(+) T cells.
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Affiliation(s)
- Devikala Gurusamy
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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22
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Macrophage stimulating protein promotes liver metastases of small cell lung cancer cells by affecting the organ microenvironment. Clin Exp Metastasis 2012; 30:333-44. [PMID: 23011677 DOI: 10.1007/s10585-012-9540-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 09/19/2012] [Indexed: 12/12/2022]
Abstract
The organ microenvironment significantly affects the processes of cancer metastasis. Elucidating the molecular mechanisms of interaction between tumor cells and the organ microenvironment is crucial for the development of effective therapeutic strategies to eradicate cancer metastases. Macrophage stimulating protein (MSP), an activator of macrophages, regulates a pleiotropic array of effects, including proliferation, cellular motility, invasiveness, angiogenesis, and resistance to anoikis. However, the role of MSP in cancer metastasis is still largely unknown. In this study, the action of MSP on the production of metastases was determined in a multiple-organ metastasis model. The murine MSP gene was transfected into two human SCLC cell lines, SBC-5 and H1048, to establish transfectants secreting biologically active MSP. MSP gene transduction did not affect cell proliferation and motility in vitro. Intravenously inoculated MSP transfectants produced significantly larger numbers of liver metastases than parental cells or vector control clones, while there were no significant differences in bone or lung metastases among them. Immunohistochemical analyses of liver metastases revealed that tumor-associated microvessel density and tumor-infiltrating macrophages were significantly increased in lesions produced by MSP transfectants. MSP could stimulate the migration of murine macrophages and endothelial cells in vitro. Consequently, MSP may be one of the major determinants that affects the properties of tumor stroma and that produces a permissive microenvironment to promote cancer metastasis.
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23
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Häuser F, Deyle C, Berard D, Neukirch C, Glowacki C, Bickmann JK, Wenzel JJ, Lackner KJ, Rossmann H. Macrophage-stimulating protein polymorphism rs3197999 is associated with a gain of function: implications for inflammatory bowel disease. Genes Immun 2012; 13:321-7. [PMID: 22237417 DOI: 10.1038/gene.2011.88] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Crohn's disease and ulcerative colitis, the two main types of inflammatory bowel disease (IBD), were reported to be associated with a variety of genetic polymorphisms. A subset of these polymorphisms was identified in both diseases and only three of them were found in primary sclerosing cholangitis (PSC). rs3197999 (Arg689Cys) located in the MST1 gene is one of the most convincingly replicated IBD/PSC-associated polymorphisms but its functional consequences have not been investigated, yet. We expressed both MST1 gene variants (Arg(689) (MSP(wt)) and Cys(689) (MSP(mut)) in a eukaryotic cell system and compared their stimulatory effects on macrophage-like THP-1 cells. Except for the rate of apoptosis that remained unchanged, MSP(mut) significantly increased the stimulatory effect of MSP (macrophage-stimulating protein) on chemotaxis and proliferation by THP-1 cells, indicating a gain of function associated with the Arg689Cys exchange. A broad set of evidence reported previously suggests that pro-inflammatory changes in macrophage function have a major role in the initiation of the inflammatory process in IBD and PSC. Therefore, the gain of function observed with rs3197999 in MST1 might provide a cellular mechanism for the consistent association of this polymorphism with an increased risk for IBD and PSC.
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Affiliation(s)
- F Häuser
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Centre Mainz, Mainz, Germany
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24
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Latiano A, Palmieri O, Corritore G, Valvano MR, Bossa F, Cucchiara S, Castro M, Riegler G, De Venuto D, D'Incà R, Andriulli A, Annese V. Variants at the 3p21 locus influence susceptibility and phenotype both in adults and early-onset patients with inflammatory bowel disease. Inflamm Bowel Dis 2010; 16:1108-17. [PMID: 20024904 DOI: 10.1002/ibd.21176] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND To date, a number of high-profile studies have yielded over 50 inflammatory bowel disease (IBD) disease genes/loci. The polymorphisms rs9858542 (BSN) and rs3197999 (MST1), on 3p21 locus, have been found associated with susceptibility to IBD. We aimed to replicate these associations in adult and early-onset cohorts of IBD Italian patients, by analyzing also potential gene-gene interactions with variants in NOD2/CARD15, IL23R, ATG16L1, and IRGM genes, and investigating genotype-phenotype correlation. METHODS In all, 1808 patients with IBD, 855 with Crohn's disease (CD) and 953 with ulcerative colitis (UC), including 539 patients with their initial diagnosis <19 years of age, and 651 controls were analyzed for SNPs rs9858542 and rs3197999. RESULTS BSN and MST1 were significantly associated with either CD (P(rs9858542) 2.5 x 10(-7); P(rs3197999) 3.9 x 10(-7)), and UC (P(rs9858542) = 3.1 x 10(-4); P(rs3197999) = 8 x 10(-4)). Prevalence of these variants was significantly increased in both adult and early-onset IBD patients. After stepwise logistic regression, the 2 variants were associated in adult UC with distal colitis (P(rs9858542) = 0.013, odds ratio [OR] = 2.04, 95% confidence interval [CI] = 1.16-3.59; P(rs3197999) = 0.018, OR 1.9, 95% CI 1.2-3.3), while the rs3197999 variant was inversely associated with occurrence of extraintestinal manifestations in adult CD(P = 0.017, OR 0.6, 95% CI 0.4-0.9). CONCLUSIONS We confirmed the association of BSN and MST1 with IBD susceptibility, either in the adult or the early-onset cohorts. These variants appeared to influence either the distal location of the disease in the UC cohort and extraintestinal manifestations in CD patients.
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Affiliation(s)
- Anna Latiano
- Division of Gastroenterology & Endoscopy, Casa Sollievo della Sofferenza Hospital, IRCCS, San Giovanni Rotondo, Italy
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Laskin DL, Chen L, Hankey PA, Laskin JD. Role of STK in mouse liver macrophage and endothelial cell responsiveness during acute endotoxemia. J Leukoc Biol 2010; 88:373-82. [PMID: 20453108 DOI: 10.1189/jlb.0210113] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Acute endotoxemia is associated with excessive production of proinflammatory mediators by hepatic macrophages and endothelial cells, which have been implicated in liver injury and sepsis. In these studies, we analyzed the role of MSP and its receptor STK in regulating the activity of these cells. Acute endotoxemia, induced by administration of LPS (3 mg/kg) to mice, resulted in increased expression of STK mRNA and protein in liver macrophages and endothelial cells, an effect that was dependent on TLR-4. This was correlated with decreased MSP and increased pro-MSP in serum. In Kupffer cells, but not endothelial cells, MSP suppressed LPS-induced NOS-2 expression, with no effect on COX-2. LPS treatment of mice caused a rapid (within 3 h) increase in the proinflammatory proteins NOS-2, IL-1beta, and TNF-alpha, as well as TREM-1 and TREM-3 and the anti-inflammatory cytokine IL-10 in liver macrophages and endothelial cells. Whereas LPS-induced expression of proinflammatory proteins was unchanged in STK-/- mice, IL-10 expression was reduced significantly. Enzymes mediating eicosanoid biosynthesis including COX-2 and mPGES-1 also increased in macrophages and endothelial cells after LPS administration. In STK-/- mice treated with LPS, mPGES-1 expression increased, although COX-2 expression was reduced. LPS-induced up-regulation of SOD was also reduced in STK-/- mice in liver macrophages and endothelial cells. These data suggest that MSP/STK signaling plays a role in up-regulating macrophage and endothelial cell anti-inflammatory activity during hepatic inflammatory responses. This may be important in protecting the liver from tissue injury.
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Affiliation(s)
- Debra L Laskin
- Department of Pharmacology and Toxicology, Rutgers University, Ernest Mario School of Pharmacy, 160 Frelinghuysen Rd., Piscataway, NJ 08854, USA.
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26
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Thomas RM, Toney K, Fenoglio-Preiser C, Revelo-Penafiel MP, Hingorani SR, Tuveson DA, Waltz SE, Lowy AM. The RON receptor tyrosine kinase mediates oncogenic phenotypes in pancreatic cancer cells and is increasingly expressed during pancreatic cancer progression. Cancer Res 2007; 67:6075-82. [PMID: 17616662 DOI: 10.1158/0008-5472.can-06-4128] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pancreatic cancer is an aggressive disease characterized by rapid growth and early metastasis. The recepteur d'origine nantais (RON) receptor tyrosine kinase is overexpressed and/or constitutively active in several epithelial cancers, but its role in pancreatic cancer is unknown. In this study, we have characterized RON expression in both murine and human pancreatic cancer. Immunoblotting indicates that RON is expressed in pancreatic intraepithelial neoplasia (PanIN), primary, and metastatic cell lines both in the human and mouse. Immunostaining revealed that 93% of high-grade PanIN, 79% of primary, and 83% of metastatic lesions from human pancreatic tissue samples expressed RON, with minimal expression in normal ducts and low-grade PanIN (6% and 18%, respectively). Moreover, we show a dose-dependent effect of hepatocyte growth factor-like protein (HGFL), the RON-specific ligand, on pancreatic cancer cell migration and invasion, which was reversed by RON inhibition. Although stimulation with HGFL had no effect on proliferation, concurrent RON receptor blockade and gemcitabine treatment increased apoptosis of RON-expressing pancreatic cancer cells versus gemcitabine treatment alone. Finally, HGFL stimulation of pancreatic cancer cells resulted in increased expression of phospho-mitogen-activated protein kinase and phospho-Akt. Taken together, these findings suggest that RON receptor signaling may contribute to pancreatic carcinogenesis, and that further investigation is warranted to assess the potential of RON-directed therapies in this deadly disease.
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Affiliation(s)
- Ryan M Thomas
- Division of Surgical Oncology, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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27
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Litjens SHM, de Pereda JM, Sonnenberg A. Current insights into the formation and breakdown of hemidesmosomes. Trends Cell Biol 2006; 16:376-83. [PMID: 16757171 DOI: 10.1016/j.tcb.2006.05.004] [Citation(s) in RCA: 233] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2006] [Revised: 05/03/2006] [Accepted: 05/24/2006] [Indexed: 11/20/2022]
Abstract
Hemidesmosomes are multiprotein adhesion complexes that promote epithelial stromal attachment in stratified and complex epithelia. Modulation of their function is of crucial importance in a variety of biological processes, such as differentiation and migration of keratinocytes during wound healing and carcinoma invasion, in which cells become detached from the substrate and acquire a motile phenotype. Although much is known about the signaling potential of the alpha6beta4 integrin in carcinoma cells, the events that coordinate the disassembly of hemidesmosomes during differentiation and wound healing remain unclear. The binding of alpha6beta4 to plectin has a central role in hemidesmosome assembly and it is becoming clear that disrupting this interaction is a crucial event in hemidesmosome disassembly. In addition, further insight into the functional interplay between alpha3beta1 and alpha6beta4 has contributed to our understanding of hemidesmosome disassembly and cell migration.
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Affiliation(s)
- Sandy H M Litjens
- Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands
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28
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Tsutsui S, Noorbakhsh F, Sullivan A, Henderson AJ, Warren K, Toney-Earley K, Waltz SE, Power C. RON-regulated innate immunity is protective in an animal model of multiple sclerosis. Ann Neurol 2005; 57:883-95. [PMID: 15929040 DOI: 10.1002/ana.20502] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The tyrosine kinase receptor RON and its ligand, macrophage stimulating protein (MSP), exert inhibitory effects on systemic innate immunity, but their CNS expression and impact on human neuroinflammatory diseases are unknown were RON and MSP present in human brain perivascular macrophages and microglia, but RON mRNA and protein abundance in the CNS were diminished in both MS patients and the MS animal model, experimental autoimmune encephalomyelitis (EAE). Treatment of differentiated human monocytoid cells with MSP resulted in significant reduction of interleukin (IL)-1beta, tumor necrosis factor (TNF)-alpha and MMP-9 mRNA levels, whereas minimal effects were observed in human astrocytes. After induction of EAE, RON knockout and heterozygote animals exhibited significantly increased CNS proinflammatory gene (TNF-alpha, MMP-12) expression compared with wild-type littermate controls, although IL-4 levels were suppressed in both RON-deficient groups. Neurological disease in RON-deficient animals showed a more rapid onset with overall worsened severity, together with exacerbated demyelination, axonal injury, and neuroinflammation after EAE induction. The proto-oncogene, c-Cbl, which modulates ubiquitylation of RON, was increased in glia in both MS brains and EAE spinal cords. Thus, the MSP-RON pathway represents a novel regulatory mechanism within the CNS by which innate immunity and its pathogenic effects could be targeted for future therapeutic interventions.
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MESH Headings
- Animals
- Axons/pathology
- Central Nervous System/immunology
- Demyelinating Diseases/immunology
- Demyelinating Diseases/pathology
- Disease Models, Animal
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Encephalomyelitis, Autoimmune, Experimental/physiopathology
- Female
- Hepatocyte Growth Factor/genetics
- Humans
- Mice
- Mice, Inbred Strains
- Mice, Knockout
- Microglia/pathology
- Multiple Sclerosis/immunology
- Multiple Sclerosis/pathology
- Multiple Sclerosis/physiopathology
- Oncogene Protein v-cbl
- Proto-Oncogene Mas
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- Proto-Oncogene Proteins c-cbl
- Receptor Protein-Tyrosine Kinases/genetics
- Receptor Protein-Tyrosine Kinases/immunology
- Receptor Protein-Tyrosine Kinases/metabolism
- Retroviridae Proteins, Oncogenic/genetics
- Severity of Illness Index
- U937 Cells
- Ubiquitin-Protein Ligases/metabolism
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Affiliation(s)
- Shigeki Tsutsui
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
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29
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Chan EL, Peace BE, Collins MH, Toney-Earley K, Waltz SE. Ron tyrosine kinase receptor regulates papilloma growth and malignant conversion in a murine model of skin carcinogenesis. Oncogene 2005; 24:479-88. [PMID: 15531916 DOI: 10.1038/sj.onc.1208231] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Recent studies demonstrate that the receptor tyrosine kinase (TK) Ron is tumorigenic when overexpressed and plays a role in regulating skin homeostasis. We hypothesized that Ron signaling promotes skin carcinogenesis. To test this hypothesis, mice deficient in the TK domain of Ron (TK(-/-) mice) were crossed with v-Ha-ras (Tg.AC) transgenic mice; the resulting TK(-/-) Tg.AC(+/-) mice, and their controls, were utilized in a model of chemically induced Ras-mediated skin carcinogenesis. The mice were treated with 2.5 microg of 12-O-tetradecanoylphorbol-13-acetate applied weekly to the shaved back of 36 control (TK(+/+) Tg.AC(+/-)) and 35 experimental (TK(-/-) Tg.AC(+/-)) mice. In an analysis of the resulting papillomas, a reduction in cellular proliferation and papilloma volume was found in the TK(-/-) Tg.AC(+/-) mice compared to controls. Further, Ron protein expression was upregulated during papilloma formation. Ablation of Ron signaling resulted in partial defects in MAPK and Akt signaling that may account for the decreased papilloma growth in the TK(-/-) Tg.AC(+/-) mice. The papilloma-bearing mice were monitored for the occurrence of malignant skin tumors and other malignant tumor types for a period of 48 weeks. Loss of Ron receptor signaling significantly reduced the percent of papillomas that underwent malignant conversion as well as the number of mice developing other malignant tumor types. In conclusion, these studies demonstrate that Ron signaling augments papilloma growth and malignant conversion in vivo.
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Affiliation(s)
- Edward L Chan
- Department of Pediatrics, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, OH 45267-0558, USA
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30
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Lee ES, Kalantari P, Tsutsui Section S, Klatt A, Holden J, Correll PH, Power Section C, Henderson AJ. RON Receptor Tyrosine Kinase, a Negative Regulator of Inflammation, Inhibits HIV-1 Transcription in Monocytes/Macrophages and Is Decreased in Brain Tissue from Patients with AIDS. THE JOURNAL OF IMMUNOLOGY 2004; 173:6864-72. [PMID: 15557181 DOI: 10.4049/jimmunol.173.11.6864] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Activation of macrophages and microglia cells after HIV-1 infection and their production of inflammatory mediators contribute to HIV-associated CNS diseases. The mechanisms that initiate and maintain inflammation after HIV-1 infection in the brain have not been well studied. Furthermore, it is not understood why in HIV-associated CNS disease, macrophages and microglia are biased toward inflammation rather than production of mediators that control inflammation. We have focused on the receptor tyrosine kinase RON, a critical negative regulator of macrophage function and inflammation, to determine whether this receptor regulates HIV-1 expression. Overexpressing RON in monocytes/macrophages demonstrates that RON inhibits HIV-1 proviral transcription in part by decreasing the binding activity of NF-kappaB to the HIV-1 long terminal repeat. Because macrophages and microglia cells are a critical reservoir for HIV-1 in the CNS, we examined brain tissues for RON expression and detected RON in astrocytes, cortical neurons, and monocytoid cells. RON was detected in all control patients who were HIV seronegative (n = 7), whereas six of nine brain samples obtained from AIDS patients exhibited reduced RON protein. These data suggest that RON initiates signaling pathways that negatively regulate HIV-1 transcription in monocytes/macrophages and that HIV-1 suppresses RON function by decreasing protein levels in the brain to assure efficient replication. Furthermore, HIV-1 infection would compromise the ability of RON to protect against inflammation and consequent CNS damage.
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Affiliation(s)
- Eileen S Lee
- Graduate Program in Biochemistry, Department of Veterinary Science, Pennsylvania State University, University Park, PA 16802, USA
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31
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McElwee KJ, Huth A, Kissling S, Hoffmann R. Macrophage-Stimulating Protein Promotes Hair Growth Ex Vivo and Induces Anagen from Telogen Stage Hair Follicles In Vivo. J Invest Dermatol 2004; 123:34-40. [PMID: 15191539 DOI: 10.1111/j.0022-202x.2004.22712.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Hepatocyte growth factor (HGF) is a promoter of hair follicle growth. We examined another HGF family member, macrophage-stimulating protein (MSP), for its hair follicle-modulating properties. Western blotting revealed presence of mature MSP in cultured human dermal papilla (DP) cells and bulbar dermal sheath (DS) cells, but not non-bulbar DS cells. Immunohistology demonstrated expression of MSP receptor RON in the outer and inner root sheaths, hair matrix cells, DP, and bulbar DS whereas non-follicular epithelium and some cells of the sweat glands exhibited low-level receptor expression. Human hair follicles exposed in vitro for 8 d to 0.1, 1, 10, and 100 ng per mL MSP all yielded a mean net increase in hair follicle length in excess of the mean baseline growth observed in controls. MSP was incubated with agarose beads and injected subcutaneously into mice all 70 d old when a uniform telogen state in dorsal skin was apparent. All eight mice receiving 1 microg MSP, and four of eight receiving 100 ng MSP showed induction of anagen hair growth at the site of bead implantation by 16 d whereas eight mice implanted with saline incubated beads had no hair growth. The data identify MSP as a modulator of hair growth.
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Affiliation(s)
- Kevin J McElwee
- Department of Dermatology, Philipp University, Marburg, Germany.
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32
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Morrison AC, Wilson CB, Ray M, Correll PH. Macrophage-stimulating protein, the ligand for the stem cell-derived tyrosine kinase/RON receptor tyrosine kinase, inhibits IL-12 production by primary peritoneal macrophages stimulated with IFN-gamma and lipopolysaccharide. THE JOURNAL OF IMMUNOLOGY 2004; 172:1825-32. [PMID: 14734766 DOI: 10.4049/jimmunol.172.3.1825] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
IL-12, produced by APCs during the initial stages of an immune response, plays a pivotal role in the induction of IFN-gamma by NK and gammadeltaT cells and in driving the differentiation of Th1 cells, thus providing a critical link between innate and acquired immunity. Due to the unique position occupied by IL-12 in the regulation of immunity, many mechanisms have evolved to modulate IL-12 production. We have shown previously that macrophage-stimulating protein (MSP), the ligand for the stem cell-derived tyrosine kinase/recepteur d'origine nantais (RON) receptor, inhibits NO production by macrophages in response to IFN-gamma and enhances the expression of arginase. Mice lacking RON exhibit increased inflammation in a delayed-type hypersensitivity reaction and increased susceptibility to endotoxic shock. In this study we demonstrate that pretreatment of macrophages with MSP before IFN-gamma and LPS results in the complete inhibition of IL-12 production due to suppression of p40 expression. This response is mediated by the RON receptor, and splenocytes from RON(-/-) animals produce increased levels of IFN-gamma. MSP pretreatment of macrophages resulted in decreased tyrosine phosphorylation of Stat-1 and decreased expression of IFN consensus sequence binding protein in response to inflammatory cytokines. In addition to IL-12, the expression of IL-15 and IL-18, cytokines that are also dependent on IFN consensus sequence binding protein activation, is inhibited by pretreatment with MSP before IFN-gamma and LPS. We also show that the ability of MSP to inhibit IL-12 production is independent of IL-10. Taken together, these results suggest that MSP may actively suppress cell-mediated immune responses through its ability to down-regulate IL-12 production and thus inhibit classical activation of macrophages.
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Affiliation(s)
- Amy C Morrison
- Department of Veterinary Science, Graduate Program in Biochemistry, Microbiology, and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA
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Correll PH, Morrison AC, Lutz MA. Receptor tyrosine kinases and the regulation of macrophage activation. J Leukoc Biol 2004; 75:731-7. [PMID: 14726496 DOI: 10.1189/jlb.0703347] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- P H Correll
- Department of Veterinary Science, The Pennsylvania State University, University Park, PA 16802-3500, USA.
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34
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Santoro MM, Gaudino G, Marchisio PC. The MSP receptor regulates alpha6beta4 and alpha3beta1 integrins via 14-3-3 proteins in keratinocyte migration. Dev Cell 2003; 5:257-71. [PMID: 12919677 DOI: 10.1016/s1534-5807(03)00201-6] [Citation(s) in RCA: 176] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Growth factors, integrins, and the extracellular matrix (ECM) are known to play key roles in epidermal wound healing, although the interplay between these proteins is not fully understood. We show that growth factor macrophage stimulating protein (MSP)- and its receptor Ron-mediated PI3K activation in keratinocytes induces phosphorylation of both Ron and alpha6beta4 integrin at specific 14-3-3 binding sites. Consequently, a Ron/alpha6beta4 complex formed via 14-3-3 binding displaces alpha6beta4 from its location at hemidesmosomes (structures supporting cell adhesion) and relocalizes it to lamellipodia. Concomitant activation of alpha3beta1 and keratinocyte spreading/migration on laminin-5 occurs. Further, MSP-dependent beta4 tyrosine phosphorylation evokes p38 and NF-kappaB signaling required for keratinocyte wound closure. Based on these results, we propose a mechanism based on MSP-Ron-dependent phosphorylation and 14-3-3 association, whereby the function of alpha6beta4 switches from a mechanical adhesive device into a signaling component, and might be critically involved in human epidermal wound healing.
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Affiliation(s)
- Massimo M Santoro
- Department of Medical Sciences, University of Piemonte Orientale "A. Avogadro", 28100, Novara, Italy.
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35
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Abstract
Cutaneous wound healing is a complex process involving blood clotting, inflammation, new tissue formation, and finally tissue remodeling. It is well described at the histological level, but the genes that regulate skin repair have only partially been identified. Many experimental and clinical studies have demonstrated varied, but in most cases beneficial, effects of exogenous growth factors on the healing process. However, the roles played by endogenous growth factors have remained largely unclear. Initial approaches at addressing this question focused on the expression analysis of various growth factors, cytokines, and their receptors in different wound models, with first functional data being obtained by applying neutralizing antibodies to wounds. During the past few years, the availability of genetically modified mice has allowed elucidation of the function of various genes in the healing process, and these studies have shed light onto the role of growth factors, cytokines, and their downstream effectors in wound repair. This review summarizes the results of expression studies that have been performed in rodents, pigs, and humans to localize growth factors and their receptors in skin wounds. Most importantly, we also report on genetic studies addressing the functions of endogenous growth factors in the wound repair process.
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Affiliation(s)
- Sabine Werner
- Institute of Cell Biology, ETH Zurich, Hönggerberg, HPM D42, CH-8093 Zurich, Switzerland.
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36
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Rampino T, Gregorini M, Soccio G, Maggio M, Rosso R, Malvezzi P, Collesi C, Dal Canton A. The Ron proto-oncogene product is a phenotypic marker of renal oncocytoma. Am J Surg Pathol 2003; 27:779-85. [PMID: 12766581 DOI: 10.1097/00000478-200306000-00008] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The proto-oncogene product Ron is the receptor for macrophage stimulating protein, a scatter factor that stimulates cell proliferation, prevents apoptosis, and induces an invasive cell phenotype. We investigated the expression of Ron, Ki-67 (proliferation index), p53, and bcl-2 (proapoptotic and antiapoptotic proteins, respectively) in 50 renal tumors (19 clear cell carcinomas, 18 oncocytomas, 7 papillary cell carcinomas, 5 chromophobe cell carcinomas, and 1 carcinoma with sarcomatoid areas). In addition, we studied Ron in normal kidney and in the renal carcinoma cell line Caki-1. Immunostaining and Western blot showed Ron in normal kidney and in all oncocytomas but never in renal cell carcinomas or in Caki-1. In addition, Western blot showed that Ron was expressed in phosphorylated, i.e., active, form. Bcl-2 was strongly expressed in oncocytomas, whereas Ki-67 and p53 were much less expressed in oncocytomas than in carcinomas. These results indicate in Ron a marker that differentiates oncocytoma from the other renal epithelial tumors. We therefore think that Ron may prove to be a new tool for a sound and precise diagnosis of oncocytoma, a benign tumor that cannot always be distinguished from carcinomas at histologic examination. The overexpression of bcl-2, but not p53 in oncocytoma, suggests that the MSP/Ron system sustains the growth of oncocytoma by opposing apoptosis.
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Affiliation(s)
- Teresa Rampino
- Unit of Nephrology, Dialysis and Transplantation, IRCCS Policlinico San Matteo University, Milano, Italy.
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Lutz MA, Correll PH. Activation of CR3-mediated phagocytosis by MSP requires the RON receptor, tyrosine kinase activity, phosphatidylinositol 3-kinase, and protein kinase C zeta. J Leukoc Biol 2003; 73:802-14. [PMID: 12773513 DOI: 10.1189/jlb.0602319] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Macrophage-stimulating protein (MSP) promotes the phagocytosis of C3bi-coated erythrocytes by resident peritoneal macrophages, although the mechanism by which this occurs is largely unknown. We show that MSP-induced complement-mediated phagocytosis requires the RON receptor tyrosine kinase and the alphaMbeta2 integrin, as evidenced by the inability of RON-/- and alphaM-/- peritoneal macrophages to augment phagocytosis of complement-coated sheep erythrocytes in response to MSP. MSP stimulation of macrophages results in tyrosine phosphorylation and AKT activation, and inhibitor studies demonstrate a phagocytic requirement for tyrosine kinase and phosphatidylinositol 3-kinase (PI-3K) activity as well as activity of the atypical protein kinase C (PKC) isoform zeta, which localizes to MSP-induced phagosomes containing complement-coated beads. Additionally, MSP augments the ability of peritoneal macrophages to bind to intercellular adhesion molecule-1 (ICAM-1) via the alphaMbeta2 integrin. MSP-induced ICAM-1 adhesion is also dependent on tyrosine kinase activity, PI-3K, and PKC zeta, indicating that these signaling requirements are upstream of complement receptor 3 activation.
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Affiliation(s)
- Michael A Lutz
- Department of Veterinary Science, Pennsylvania State University, Pathobiology Graduate Program, University Park 16802, USA
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Wetzel CC, Degen SJF, Waltz SE. Cis-acting elements in the hepatocyte growth factor-like protein gene regulate kidney and liver-specific expression in mice. DNA Cell Biol 2003; 22:293-301. [PMID: 12941157 DOI: 10.1089/104454903322216644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Previous studies from our laboratory demonstrated that the hepatocyte-specific transcriptional activity of the hepatocyte growth factor-like protein/macrophage stimulating protein (HGFL) promoter is modulated in HepG2 cells by the first 135 base pairs (bp) upstream of the HGFL transcriptional start site. Gel mobility shift and transactivation assays demonstrated that hepatocyte nuclear factor-4 (HNF-4) binds to this region and is responsible, in part, for the liver-specific expression of this gene in HepG2 cells. In an attempt to understand the in vivo mechanism regulating the expression of HGFL, a series of transgenic mice were generated that contained four different regions upstream of the HGFL promoter attached to the coding sequences for chloramphenicol acetyltransferase (CAT). Interestingly, upstream promoter sequences, containing as little as 104 bp upstream of the translational start site, were able to drive reporter expression and protein production specifically in kidney and liver tissue. Strikingly, when the first exon and intron of the HGFL gene was inserted downstream of the 135 bp promoter element, only liver-specific expression was observed. These studies indicate that short sequences upstream of HGFL can drive efficient expression in kidney and liver tissue, and that sequences in the first intron of the HGFL gene contain regulatory elements that direct kidney-specific transcriptional repression in vivo and aid in the proper recapitulation of HGFL expression in mice.
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Affiliation(s)
- Cynthia C Wetzel
- College of Medicine, University of Cincinnati Medical Center, Cincinnati, OH 45267-0555, USA
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Wang MH, Zhou YQ, Chen YQ. Macrophage-stimulating protein and RON receptor tyrosine kinase: potential regulators of macrophage inflammatory activities. Scand J Immunol 2002; 56:545-53. [PMID: 12472665 DOI: 10.1046/j.1365-3083.2002.01177.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Macrophage-stimulating protein (MSP) is a serum protein belonging to the plasminogen-related growth factor family. The specific receptor for MSP is the RON (recepteur d'origine nantais) receptor tyrosine kinase - a member of the MET proto-oncogene family. Activation of RON by MSP exerts dual functions on macrophages. The stimulatory activities include the induction of macrophage spreading, migration and phagocytosis. However, MSP also inhibits lipopolysaccharide (LPS)-induced production of inflammatory mediators, including inducible nitric oxide and prostaglandins. These suppressive effects are mediated by RON-transduced signals that block LPS-induced enzymatic cascades that activate nuclear factor kappa-B (NFkappaB) pathways. Recent in vivo studies demonstrated that inactivation of the RON gene results in increased inflammatory responses and susceptibility to LPS-induced septic death in mice, suggesting that RON expression is required for attenuating the extent of inflammatory responses in vivo. Thus, MSP and RON are potential regulators that control macrophage activities during bacterial infection in vivo.
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Affiliation(s)
- M-H Wang
- Department of Medicine and Immunology, University of Colorado Health Sciences Center and Denver Health Medical Center, Denver, CO, USA.
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40
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Zhou YQ, Chen YQ, Fisher JH, Wang MH. Activation of the RON receptor tyrosine kinase by macrophage-stimulating protein inhibits inducible cyclooxygenase-2 expression in murine macrophages. J Biol Chem 2002; 277:38104-10. [PMID: 12177064 DOI: 10.1074/jbc.m206167200] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The RON receptor tyrosine kinase is activated by macrophage-stimulating protein, which regulates macrophage migration, phagocytosis, and nitric oxide production. We report here the inhibitory effect of RON on lipopolysaccharide (LPS)-induced cyclooxygenase (Cox)-2 expression in mouse macrophages. In RON-expressing macrophages treated with macrophage stimulating protein, LPS-induced prostaglandin E(2) (PGE(2)) production was significantly reduced. The inhibition was accompanied by reduction of Cox-2 protein and mRNA expression. Transcriptional studies indicated that RON activation inhibits LPS-induced luciferase activity driven by the Cox-2 gene promoter. To determine whether RON activation affects LPS-induced NF-kappa B pathway, which is important for Cox-2 expression. Western blot analyses were performed showing that RON activation inhibits LPS-induced I kappa B alpha degradation. The decreased I kappa B alpha degradation was due to reduced I kappa B alpha phosphorylation at Ser-32 as determined by I kappa B alpha (Ser-32) phosphor-antibody. Moreover, we found that LPS-induced IKK beta activity, an enzyme responsible for phosphorylation of I kappa B alpha, was inhibited upon RON activation. Interestingly, these inhibitory effects were not regulated by RON-mediated phosphatidylinositol-3 kinase. These results suggest that RON activation inhibits LPS-induced macrophage Cox-2 expression. The inhibitory effect is mediated by impairing LPS-activated cascade enzymes that activate NF-kappa B. The inhibition of Cox-2 expression might represent a novel mechanism for the inhibitory functions of RON in vivo against LPS-induced inflammation and septic shock.
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Affiliation(s)
- Yong-Qing Zhou
- Division of Neurosurgery, The First Affiliated Teaching Hospital, Zhejiang University School of Medicine, Hangzhou 310003, People's Republic of China
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41
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Rampino T, Collesi C, Gregorini M, Maggio M, Soccio G, Guallini P, Canton AD. Macrophage-stimulating protein is produced by tubular cells and activates mesangial cells. J Am Soc Nephrol 2002; 13:649-657. [PMID: 11856768 DOI: 10.1681/asn.v133649] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Until now, hepatocytes have been the only known cell source of macrophage-stimulating protein (MSP), and tissue macrophages have been the cells on which the biologic effects of MSP have been proved. To extend the understanding of the biologic meaning of MSP, it was investigated whether MSP operates in the kidney. MSP protein was evaluated by Western blot in supernatant of cultured human tubular cells (HK2) and human mesangial cells (HMC). MSP mRNA was investigated in HK2 by reverse transcription-polymerase chain reaction (RT-PCR). The expression of the MSP receptor, RON, was evaluated in HMC and HK2 by Western blot. RON mRNA was investigated in HMC by RT-PCR. The expression of MSP and RON in normal human renal tissue was studied by immunohistochemistry. HMC were stimulated with recombinant MSP (rMSP) and HK2 supernatant to study cell growth, migration, and the capacity to invade an artificial collagen matrix and synthesize interleukin-6 (IL-6). HK2 produced MSP and expressed RON in a form that was phosphorylated by rMSP. HMC expressed RON but did not produce MSP. MSP in HK2 supernatant and rMSP induced in HMC phosphorylation of RON, growth, migration, invasion, and IL-6 synthesis. In normal human kidney, tubules expressed MSP and RON. These results indicate a novel field of operation for MSP and suggest a pathogenic role of the MSP/RON system in renal disease. In fact, MSP released by tubular cells may recruit monocytes/macrophages in inflammatory tubulointerstitial disorders. In addition, MSP either circulating or as paracrine product may sustain glomerular mesangioproliferative disease.
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Affiliation(s)
- Teresa Rampino
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
| | - Chiara Collesi
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
| | - Marilena Gregorini
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
| | - Milena Maggio
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
| | - Grazia Soccio
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
| | - Paola Guallini
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
| | - Antonio Dal Canton
- *Unit of Nephrology, Dialysis and Transplant, I. R. C. C. S. Policlinico San Matteo and University, Pavia, Italy; and Institute for Cancer Research and Treatment, Torino, Italy
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42
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Chen Y, Zhou Y, Wang M. Activation of the RON receptor tyrosine kinase protects murine macrophages from apoptotic death induced by bacterial lipopolysaccharide. J Leukoc Biol 2002. [DOI: 10.1189/jlb.71.2.359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Yi‐Qing Chen
- Department of Medicine, University of Colorado School of Medicine, Denver Health Medical Center, Denver; and
| | - Yong‐Qing Zhou
- Division of Neurosurgery, The First Affiliated Teaching Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
| | - Ming‐Hai Wang
- Department of Medicine, University of Colorado School of Medicine, Denver Health Medical Center, Denver; and
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43
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Morrison AC, Correll PH. Activation of the stem cell-derived tyrosine kinase/RON receptor tyrosine kinase by macrophage-stimulating protein results in the induction of arginase activity in murine peritoneal macrophages. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:853-60. [PMID: 11777982 DOI: 10.4049/jimmunol.168.2.853] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Regulation of macrophage activities in response to inflammatory stimuli must be finely tuned to promote an effective immune response while, at the same time, preventing damage to the host. Our lab and others have previously shown that macrophage-stimulating protein (MSP), through activation of its receptor RON, negatively regulates NO production in response to IFN-gamma and LPS by inhibiting the expression of inducible NO synthase (iNOS). Furthermore, activated macrophages from mice harboring targeted mutations in RON produce increased levels of NO both in vitro and in vivo, rendering them more susceptible to LPS-induced endotoxic shock. In this study, we demonstrate that stimulation of murine peritoneal macrophages with MSP results in the RON-dependent up-regulation of arginase, an enzyme associated with alternative activation that competes with iNOS for the substrate L-arginine, the products of which are involved in cell proliferation and matrix synthesis. Expression of other genes associated with alternative activation, including scavenger receptor A and IL-1R antagonist, is also up-regulated in MSP-stimulated murine macrophages. Stimulation of cells with IFN-gamma and LPS blocks the ability of MSP to induce arginase activity. However, pretreatment of cells with MSP results in the up-regulation of arginase and inhibits their ability to produce NO in response to IFN-gamma and LPS, even in the presence of excess substrate, suggesting that the inhibition of NO by MSP occurs primarily through its ability to regulate iNOS expression.
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MESH Headings
- Animals
- Arginase/biosynthesis
- Cells, Cultured
- Enzyme Activation/immunology
- Enzyme Induction/immunology
- Growth Substances/physiology
- Hematopoietic Stem Cells/enzymology
- Hepatocyte Growth Factor
- Interferon-gamma/pharmacology
- Interleukin 1 Receptor Antagonist Protein
- Interleukin-10/biosynthesis
- Lipopolysaccharides/pharmacology
- Macrophage Activation/immunology
- Macrophages, Peritoneal/enzymology
- Macrophages, Peritoneal/immunology
- Macrophages, Peritoneal/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Nitric Oxide/antagonists & inhibitors
- Nitric Oxide/biosynthesis
- Proto-Oncogene Proteins
- Receptor Protein-Tyrosine Kinases/metabolism
- Receptor Protein-Tyrosine Kinases/physiology
- Receptors, Cell Surface/metabolism
- Receptors, Cell Surface/physiology
- Receptors, Immunologic/biosynthesis
- Receptors, Interleukin-1/antagonists & inhibitors
- Receptors, Scavenger
- Sialoglycoproteins/biosynthesis
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Affiliation(s)
- Amy C Morrison
- Department of Veterinary Science and Graduate Program in Biochemistry, Microbiology, and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA
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Brunelleschi S, Penengo L, Lavagno L, Santoro C, Colangelo D, Viano I, Gaudino G. Macrophage stimulating protein (MSP) evokes superoxide anion production by human macrophages of different origin. Br J Pharmacol 2001; 134:1285-95. [PMID: 11704649 PMCID: PMC1573047 DOI: 10.1038/sj.bjp.0704356] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1. Macrophage Stimulating Protein (MSP), a serum factor related to Hepatocyte Growth Factor, was originally discovered to stimulate chemotaxis of murine resident peritoneal macrophages. MSP is the ligand for Ron, a member of the Met subfamily of tyrosine kinase receptors. The effects of MSP on human macrophages and the role played in human pathophysiology have long been elusive. 2. We show here that human recombinant MSP (hrMSP) evokes a dose-dependent superoxide anion production in human alveolar and peritoneal macrophages as well as in monocyte-derived macrophages, but not in circulating human monocytes. Consistently, the mature Ron protein is expressed by the MSP responsive cells but not by the unresponsive monocytes. The respiratory burst evoked by hrMSP is quantitatively higher than the one induced by N-formylmethionyl-leucyl-phenylalanine and similar to phorbol myristate acetate-evoked one. 3. To investigate the mechanisms involved in NADPH oxidase activation, leading to superoxide anion production, different signal transduction inhibitors were used. By using the non selective tyrosine kinase inhibitor genistein, the selective c-Src inhibitor PP1, the tyrosine phosphatase inhibitor sodium orthovanadate, the phosphatidylinositol 3-kinase inhibitor wortmannin, the p38 inhibitor SB203580, the MEK inhibitor PD098059, we demonstrate that hrMSP-evoked superoxide production is mediated by tyrosine kinase activity, requires the activation of Src but not of PI 3-kinase. We also show that MAP kinase and p38 signalling pathways are involved. 4. These results clearly indicate that hrMSP induces the respiratory burst in human macrophages but not in monocytes, suggesting for the MSP/Ron complex a role of activator as well as of possible marker for human mature macrophages.
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Affiliation(s)
- S Brunelleschi
- Department of Medical Sciences, University of Piemonte Orientale A. Avogadro, Via Solaroli, 17 - 28100 NOVARA, Italy.
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45
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Stella MC, Vercelli A, Repici M, Follenzi A, Comoglio PM. Macrophage stimulating protein is a novel neurotrophic factor. Mol Biol Cell 2001; 12:1341-52. [PMID: 11359926 PMCID: PMC34588 DOI: 10.1091/mbc.12.5.1341] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Macrophage stimulating protein (MSP), also known as hepatocyte growth factor-like, is a soluble cytokine that belongs to the family of the plasminogen-related growth factors (PRGFs). PRGFs are alpha/beta heterodimers that bind to transmembrane tyrosine kinase receptors. MSP was originally isolated as a chemotactic factor for peritoneal macrophages. Through binding to its receptor, encoded by the RON gene, it stimulates dissociation of epithelia and works as an inflammatory mediator by repressing the production of nitric oxide (NO). Here, we identify a novel role for MSP in the central nervous system. As a paradigm to analyze this function we chose the hypoglossal system of adult mice. We demonstrate in vivo that either administration of exogenous MSP or transplantation of MSP-producing cells at the proximal stump of the resected nerve is sufficient to prevent motoneuron atrophy upon axotomy. We also show that the MSP gene is expressed in the tongue, the target of the hypoglossal nerve, and that MSP induces biosynthesis of Ron receptor in the motoneuron somata. Finally, we show that MSP suppresses NO production in the injured hypoglossal nuclei. Together, these data suggest that MSP is a novel neurotrophic factor for cranial motoneurons and, by regulating the production of NO, may have a role in brain plasticity and regeneration.
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Affiliation(s)
- M C Stella
- Institute for Cancer Research and Treatment, IRCC, University of Torino Medical School, 10060 Candiolo, Torino, Italy.
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Skeel A, Leonard EJ. alpha 1-Antichymotrypsin is the human plasma inhibitor of macrophage ectoenzymes that cleave pro-macrophage stimulating protein. J Biol Chem 2001; 276:21932-7. [PMID: 11274154 DOI: 10.1074/jbc.m100652200] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Macrophage stimulating protein (MSP) is secreted as 78-kDa single chain pro-MSP, which is converted to biologically active, disulfide-linked alphabeta chain MSP by cleavage at Arg(483)-Val(484). Murine resident peritoneal macrophages have two cell surface proteolytic activities that cleave pro-MSP. One is a pro-MSP convertase, which cleaves pro-MSP to active MSP; the other degrades pro-MSP. The degrading protease is inhibited by soybean trypsin inhibitor or by low concentrations of blood plasma, which allows the convertase to cleave pro-MSP to MSP. Using pro-MSP cleavage as the assay, we purified the inhibitor from human plasma. The bulk of the plasma protein was removed by salting out and by isoelectric precipitation of albumin. Highly purified inhibitor was then obtained in three steps: dye-ligand binding and elution, ion exchange chromatography, and high performance liquid chromatography gel filtration. After SDS-polyacrylamide gel electrophoresis and transfer to a polyvinylidene membrane, N-terminal sequencing of the product identified it as alpha(1)-antichymotrypsin. The mean concentration of alpha(1)-antichymotrypsin in human plasma is 7 micrometer. At this concentration, alpha(1)-antichymotrypsin inhibits both macrophage enzymes. A concentration of 0.4 micrometer, which is in the expected concentration range in extracellular fluid, preferentially inhibits the degrading enzyme, which allows for cleavage to active MSP by the pro-MSP convertase.
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Affiliation(s)
- A Skeel
- Immunopathology Section, Laboratory of Immunobiology, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland 21702, USA
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47
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Affiliation(s)
- E J Leonard
- Laboratory of Immunobiology, NCI-Frederick Cancer Research and Development Center, Maryland 21702, USA
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48
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Danilkovitch A, Miller M, Leonard EJ. Interaction of macrophage-stimulating protein with its receptor. Residues critical for beta chain binding and evidence for independent alpha chain binding. J Biol Chem 1999; 274:29937-43. [PMID: 10514476 DOI: 10.1074/jbc.274.42.29937] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Macrophage-stimulating protein (MSP) and hepatocyte growth factor/scatter factor (HGF/SF) are plasminogen-related growth and motility factors that interact with cell-surface protein tyrosine kinase receptors. Each one is a heterodimeric protein comprising a disulfide-linked alpha chain and a serine protease-like beta chain. Despite structural similarities between MSP and HGF, the primary receptor binding site is located on the alpha chain of HGF/SF but on the beta chain of MSP. To obtain insight into the structural basis for MSP beta chain binding, beta chain structure was modeled from coordinates of an existing model of the HGF beta chain. The model revealed that the region corresponding to the S1 specificity pocket in trypsin is filled by the Asn(682)/Glu(648) interacting pair, leaving a shallow cavity for possible beta chain interaction with the receptor. Mutants in this region were created, and their binding characteristics were determined. A double mutation of Asn(682)/Glu(648) caused diminished binding of the beta chain to the MSP receptor, and a single mutation of neighboring Arg(683) completely abolished binding. Thus, this region of the molecule is critical for binding. We also found that at equimolar concentrations of free alpha and beta chains, alpha chain binding to receptor was detectable, at levels considerably lower than beta chain binding. The EC(50) values determined by quantitative enzyme-linked immunosorbent assay are 0.25 and 16.9 nM for beta and alpha chain, respectively. The data suggest that MSP has two independent binding sites with high and low affinities located in beta and alpha chain, respectively, and that the two sites together mediate receptor dimerization and subsequent activation.
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Affiliation(s)
- A Danilkovitch
- Laboratory of Immunobiology, NCI-Frederick Cancer Research and Development Center, ABL-Basic Research Program, Frederick, Maryland 21702, USA.
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49
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Danilkovitch A, Skeel A, Leonard EJ. Macrophage stimulating protein-induced epithelial cell adhesion is mediated by a PI3-K-dependent, but FAK-independent mechanism. Exp Cell Res 1999; 248:575-82. [PMID: 10222149 DOI: 10.1006/excr.1999.4429] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Macrophage stimulating protein (MSP) is a growth and motility factor that mediates its activity via the RON/STK receptor tyrosine kinase. MSP promotes integrin-dependent epithelial cell migration, which suggests that MSP may regulate integrin receptor functions. Integrins are cell surface receptors for extracellular matrix. Epithelial cell adhesion and motility are mediated by integrins. We studied the enhancement by MSP of cell adhesion and the molecular mechanisms mediating this effect. MSP decreased the time required for adhesion of 293 and RE7 epithelial cells to substrates coated with collagen or fibronectin. Prevention of adhesion by an RGD-containing peptide showed that the cell-substrate interaction was mediated by integrins. Wortmannin, an inhibitor of phosphatidylinositol 3-kinase (PI3-K), blocked MSP-dependent adhesion, which shows that PI3-K is in the MSP-induced adhesion pathway. MSP also affected focal adhesion kinase (FAK) which is important for some types of cell adhesion and motility. Although MSP caused PI3-K-independent tyrosine phosphorylation and activation of FAK, experiments with dominant-negative FAK constructs showed that FAK does not mediate the effects of MSP on cell adhesion or motility. Thus PI3-K, but not FAK, mediates MSP-induced integrin-dependent adhesion of epithelial cells. Also, we found ligand-independent association between RON and beta1 integrin, which is additional evidence for a relationship between these two receptor systems.
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Affiliation(s)
- A Danilkovitch
- Laboratory of Immunobiology, National Cancer Institute, Frederick, Maryland, 21702, USA.
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50
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Yoshikawa W, Hara H, Takehara T, Shimonishi M, Sakai H, Shimizu N, Shimizu S, Wang MH, Hagiya M, Skeel A, Leonard EJ. Characterization of free alpha- and beta-chains of recombinant macrophage-stimulating protein. Arch Biochem Biophys 1999; 363:356-60. [PMID: 10068459 DOI: 10.1006/abbi.1998.1090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Human serum macrophage-stimulating protein (MSP) induces motile activity of murine resident peritoneal macrophages and is a growth and motility factor for epithelial cells. It belongs to the plasminogen-related family of kringle proteins, and is secreted as a single-chain, 78-kDa, biologically inactive pro-MSP. Proteolytic cleavage of pro-MSP at a single site yields active MSP, a disulfide-linked alphabeta-chain heterodimer. However cleavage of recombinant pro-MSP yielded not only the disulfide-linked heterodimer, but also free alpha- and beta-chains, indicating that some of the recombinant molecules lacked an alphabeta-chain disulfide. We purified the free chains for characterization. The beta-chain of MSP has three extra cysteines, Cys527, Cys562, and Cys672, which are not found in the plasminogen beta-chain. Disulfide bond analysis showed a Cys527-Cys562, but also a Cys588-Cys672. Coopting Cys588 by Cys672 prevented the expected formation of a disulfide between alpha-chain Cys468 and beta-chain Cys588. Concomitant studies determined structures of oligosaccharides at the three Asn-linked glycosylation sites of MSP. The oligosaccharides at the three Asn loci are heterogeneous; 11 different sugars were identified, all being sialylated fucosyl biantennary structures. We also located the pro-MSP signal peptide cleavage site at Gly18-Gln19 and the scissile bond for formation of mature MSP at Arg483-Val484.
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Affiliation(s)
- W Yoshikawa
- Toyobo Co., Ltd., 2-1-1 Katata, Ohtsu, 520-02, Japan
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