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Rajabloo Y, Latifi H, Akhlaghipour I, Taghehchian N, Moghbeli M. MicroRNA-409: Molecular functions and clinical applications in cancer. Biochem Biophys Rep 2024; 38:101728. [PMID: 38737729 PMCID: PMC11087923 DOI: 10.1016/j.bbrep.2024.101728] [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: 02/17/2024] [Revised: 03/30/2024] [Accepted: 04/30/2024] [Indexed: 05/14/2024] Open
Abstract
Late diagnosis is one of the main reasons for high mortality rates in cancer patients. Therefore, investigating the molecular mechanisms involved in tumor progression can improve the cancer diagnosis in the early stages of the tumor progression. MicroRNAs (miRNAs) have important roles in regulation of cell growth, proliferation, metabolism, and migration. Since, deregulation of miR-409 has been reported in a wide range of cancers, in the present review, we investigated the molecular mechanisms of miR-409 during tumor progression and invasion. It has been shown that miR-409 functions as a tumor suppressor in different tumor types. MiR-409 can reduce tumor cell proliferation, growth, and migration by regulation of signaling pathways, cellular metabolism, transcription factors, and cellular adhesion. This review can be an effective step in introducing miR-409 as a non-invasive marker in cancer patients.
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Affiliation(s)
- Yasamin Rajabloo
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hanieh Latifi
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Iman Akhlaghipour
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Negin Taghehchian
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Bongartz H, Mehwald N, Seiß EA, Schumertl T, Naß N, Dittrich A. Dysregulated Gab1 signalling in triple negative breast cancer. Cell Commun Signal 2024; 22:161. [PMID: 38448989 PMCID: PMC10916281 DOI: 10.1186/s12964-024-01542-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 02/24/2024] [Indexed: 03/08/2024] Open
Abstract
BACKGROUND Breast cancer is the most common cancer in women worldwide. Triple-negative breast cancer (TNBC) is especially aggressive and associated with high metastasis. The aetiology of TNBC is heterogeneous and characterised by multiple different mutations that amongst others cause constitutive and dysregulated MAPK and PI3K signalling. Additionally, in more than 50% of TNBC patients, the epidermal growth factor receptor (EGFR) is overexpressed and constitutively active. The multi-site docking protein Grb2-associated binder 1 (Gab1) is a central signalling hub that connects MAPK and PI3K signalling. METHODS Expression and activation of members of the Gab1/PI3K/MAPK signalling network were assessed in cells from different breast cancer subtypes. Influence of short- and long-term inhibition of EGFR, MAPK and PI3K on the activation of the Gab1/PI3K/MAPK signalling network as well as on cell viability, proliferation and migration was determined. Additionally, cellular localisation of Gab1 and Gab1 variants in naive cells and cells treated with the above-mentioned inhibitors was investigated. RESULTS We show that, activation of the Gab1/PI3K/MAPK signalling network is heterogeneous between different breast cancer subtypes. Gab1 phosphorylation and plasma membrane recruitment of Gab1 are dysregulated in the EGFRhigh TNBC cell line MDA-MB-468. While the Gab1/MAPK/PI3K signalling network follows canonical Gab1 signalling in naive MDA-MB-468 cells, Gab1 signalling is changed in cells that acquired resistance towards MAPK and PI3K inhibition. In resistant cells, Gab1 is not located at the plasma membrane despite strong activation of PI3K and MAPK. Furthermore, Gab1 tyrosine phosphorylation is uncoupled from plasma membrane recruitment. CONCLUSION Our study indicates that Gab1 signalling changes fundamentally during the acquisition of resistance to pharmacological inhibitors. Given the molecular heterogeneity between breast cancer subtypes, the detailed understanding of dysregulated and aberrant signalling is an absolute necessity in order to develop personalised therapies for patients with TNBC.
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Affiliation(s)
- Hannes Bongartz
- Institute of Biology, Department of Systems Biology, Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany
- Present address: Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 9000 Rockville Pike, Bethesda, MD, 20892, USA
| | - Nora Mehwald
- Institute of Biology, Department of Systems Biology, Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany
| | - Elena A Seiß
- Institute of Biology, Department of Systems Biology, Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany
| | - Tim Schumertl
- Institute of Biology, Department of Systems Biology, Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany
- Present address: Institute of Clinical Biochemistry, Hannover Medical School, Carl-Neuberg-Straße 1, Hannover, 30625, Germany
| | - Norbert Naß
- Department of Pathology, Brandenburg Medical School Theodor Fontane, University Hospital Brandenburg / Havel, Hochstraße 29, Brandenburg, 14770, Germany
| | - Anna Dittrich
- Institute of Biology, Department of Systems Biology, Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany.
- Center for Dynamic Systems: Systems Engineering (CDS), Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany.
- Magdeburg Center for Systems Biology (MACS), Otto-von-Guericke University, Universitätsplatz 2, Magdeburg, 39106, Germany.
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Carlin CR, Ngalula S. Loss of EGF receptor polarity enables homeostatic imbalance in epithelial-cell models. Mol Biol Cell 2023; 34:ar116. [PMID: 37647145 PMCID: PMC10846618 DOI: 10.1091/mbc.e23-04-0133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/26/2023] [Accepted: 08/22/2023] [Indexed: 09/01/2023] Open
Abstract
The polarized distribution of membrane proteins into apical and basolateral domains provides the basis for specialized functions of epithelial tissues. The EGF receptor (EGFR) plays important roles in embryonic development, adult-epithelial tissue homeostasis, and growth and survival of many carcinomas. Typically targeted to basolateral domains, there is also considerable evidence of EGFR sorting plasticity but very limited knowledge regarding domain-specific EGFR substrates. Here we have investigated effects of selective EGFR mistargeting because of inactive-basolateral sorting signals on epithelial-cell homeostatic responses to growth-induced stress in MDCK cell models. Aberrant EGFR localization was associated with multilayer formation, anchorage-independent growth, and upregulated expression of the intermediate filament-protein vimentin characteristically seen in cells undergoing epithelial-to-mesenchymal transition. EGFRs were selectively retained following their internalization from apical membranes, and a signaling pathway involving the signaling adaptor Gab1 protein and extracellular signal-regulated kinase ERK5 had an essential role integrating multiple responses to growth-induced stress. Our studies highlight the potential importance of cellular machinery specifying EGFR polarity in epithelial pathologies associated with homeostatic imbalance.
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Affiliation(s)
- Cathleen R. Carlin
- Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, OH 44106-4970
- Case Western Reserve University Comprehensive Cancer Center, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4970
| | - Syntyche Ngalula
- Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, OH 44106-4970
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Pérez-Baena MJ, Cordero-Pérez FJ, Pérez-Losada J, Holgado-Madruga M. The Role of GAB1 in Cancer. Cancers (Basel) 2023; 15:4179. [PMID: 37627207 PMCID: PMC10453317 DOI: 10.3390/cancers15164179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/16/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
GRB2-associated binder 1 (GAB1) is the inaugural member of the GAB/DOS family of pleckstrin homology (PH) domain-containing proteins. Upon receiving various stimuli, GAB1 transitions from the cytoplasm to the membrane where it is phosphorylated by a range of kinases. This event recruits SH2 domain-containing proteins like SHP2, PI3K's p85 subunit, CRK, and others, thereby activating distinct signaling pathways, including MAPK, PI3K/AKT, and JNK. GAB1-deficient embryos succumb in utero, presenting with developmental abnormalities in the heart, placenta, liver, skin, limb, and diaphragm myocytes. Oncogenic mutations have been identified in the context of cancer. GAB1 expression levels are disrupted in various tumors, and elevated levels in patients often portend a worse prognosis in multiple cancer types. This review focuses on GAB1's influence on cellular transformation particularly in proliferation, evasion of apoptosis, metastasis, and angiogenesis-each of these processes being a cancer hallmark. GAB1 also modulates the resistance/sensitivity to antitumor therapies, making it a promising target for future anticancer strategies.
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Affiliation(s)
- Manuel Jesús Pérez-Baena
- Instituto de Biología Molecular y Celular del Cáncer (IBMCC-CIC), Universidad de Salamanca/CSIC, 37007 Salamanca, Spain; (M.J.P.-B.); (J.P.-L.)
- Instituto de Investigación Biosanitaria de Salamanca (IBSAL), 37007 Salamanca, Spain
| | | | - Jesús Pérez-Losada
- Instituto de Biología Molecular y Celular del Cáncer (IBMCC-CIC), Universidad de Salamanca/CSIC, 37007 Salamanca, Spain; (M.J.P.-B.); (J.P.-L.)
- Instituto de Investigación Biosanitaria de Salamanca (IBSAL), 37007 Salamanca, Spain
| | - Marina Holgado-Madruga
- Instituto de Investigación Biosanitaria de Salamanca (IBSAL), 37007 Salamanca, Spain
- Departamento de Fisiología y Farmacología, Universidad de Salamanca, 37007 Salamanca, Spain
- Instituto de Neurociencias de Castilla y León (INCyL), 37007 Salamanca, Spain
- Virtual Institute for Good Health and Well Being (GLADE), European Campus of City Universities (EC2U), 86073 Poitiers, France
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Xu R, He H, Wang Y, Peng Q, Mei K, Liu Y, Yang Q. LncRNA AK001796 promotes cell proliferation via acting as a ceRNA of miR-150 in hepatocellular carcinoma. Genet Mol Biol 2023; 46:e20220277. [PMID: 37272834 DOI: 10.1590/1678-4685-gmb-2022-0277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 04/27/2023] [Indexed: 06/06/2023] Open
Abstract
Long non-coding RNA AK001796 was initially identified altered in lung cancer. Recent research showed it could participate in the prognosis of hepatocellular carcinoma (HCC). However, the general biological role of AK001796 and its underlying mechanisms in HCC remain unclear. Here we demonstrated that the expression level of AK001796 in HCC tissues and cell lines was up-regulated. Silencing AK001796 suppressed the proliferation ability of HCC cells. Through dual luciferase reporter assays and loss/gain of functions studies, we identified that AK001796 could bind to miR-150, a star microRNA, promoting HCC proliferation. Furthermore, it was reported that growth factor receptor binding protein 2-associated binder 1 (GAB1) is a target gene of miR-150. Owing to AK001796 being a decoy for miR-150 and binding the same putative sites of miR-150 as GAB1, we presented that inhibition of miR-150 in AK001796 silencing cells reversed the reduction in GAB1. Subsequently, our findings demonstrated that silencing AK001796 can impair phospho-ERK1/2 and phospho-AKT. In conclusion, our investigation revealed that AK001796 promoted proliferation by enhancing phospho-ERK1/2 and phospho-AKT through AK001796/miR-150/GAB1 axis in HCC. These results provided further evidence for the critical roles of AK001796 accumulating HCC and suggested that AK001796 might act as an HCC biomarker in clinical treatment.
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Affiliation(s)
- Rui Xu
- Jilin University, College of Basic Medical Sciences, Department of Pathogenobiology, Changchun, Jilin Province, China
| | - Haitao He
- Jilin University, College of Basic Medical Sciences, Department of Cell Biology, Changchun, Jilin Province, China
| | - Yue Wang
- Jilin University, College of Basic Medical Sciences, Department of Pathogenobiology, Changchun, Jilin Province, China
| | - Qi Peng
- Jilin University, College of Basic Medical Sciences, Department of Pathogenobiology, Changchun, Jilin Province, China
| | - Ke Mei
- Jilin University, College of Basic Medical Sciences, Department of Pathogenobiology, Changchun, Jilin Province, China
| | - Yan Liu
- Jilin University, College of Basic Medical Sciences, Department of Pathogenobiology, Changchun, Jilin Province, China
| | - Qing Yang
- Jilin University, College of Basic Medical Sciences, Department of Pathogenobiology, Changchun, Jilin Province, China
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Zhu M, Li Y, Liu L, Zhai X. Circ_0057452 sponges miR-7-5p to promote keloid progression through upregulating GAB1. Cell Cycle 2022; 21:2471-2483. [PMID: 35876480 PMCID: PMC9677988 DOI: 10.1080/15384101.2022.2102796] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Increasing evidence has shown that circular RNAs (circRNAs) play critical roles in various diseases, including keloid. The purpose of this study was to investigate the role of circ_0057452 and related action mechanisms during the development of keloid. The expression levels of circ_0057452, microRNA-7-5p (miR-7-5p) and GRB2 associated binding protein 1 (GAB1) mRNA were determined by quantitative real-time PCR (qRT-PCR). Cell proliferation was evaluated using methylthiazolyldiphenyl-tetrazolium bromide (MTT) and 5-Ethynyl-2'-deoxyuridine (Edu) assays. Flow cytometry analysis was utilized to determine cell cycle distribution and cell apoptosis. Western blot assay was used to measure apoptosis-related, collagen synthesis-related, and GAB1 protein levels. Cell migration and invasion were detected by wound healing assay and transwell assay. The interaction between miR-7-5p and circ_0057452 or GAB1 was confirmed by dual-luciferase reporter, RNA pull-down, and RNA Immunoprecipitation (RIP) assays. Circ_0057452 and GAB1 were upregulated in keloid tissues and keloid fibroblasts (KFs), while miR-7-5p was downregulated. Circ_0057452 knockdown or miR-7-5p overexpression inhibited the proliferation, migration, invasion, and collagen synthesis and induced cell cycle arrest and apoptosis of KFs. MiR-7-5p was targeted by circ_0057452, and its inhibition overturned the effects of circ_0057452 knockdown. In addition, GAB1 was a target of miR-7-5p, and GAB1 upregulation abolished the role of miR-7-5p overexpression and circ_0057452 knockdown in KFs. Circ_0057452 regulated the expression of GAB1 by adsorbing miR-7-5p in KFs. Circ_0057452 knockdown suppressed keloid development by regulating miR-7-5p/GAB1 axis, which might provide a promising therapeutic target for keloid.
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Affiliation(s)
- Mengying Zhu
- Department of Plastic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yonglin Li
- Department of Plastic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Linbo Liu
- Department of Plastic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaomei Zhai
- Department of Plastic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,CONTACT Xiaomei Zhai Department of Plastic Surgery, the First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou450000, China
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Lee CJ, Modave E, Boeckx B, Stacchiotti S, Rutkowski P, Blay JY, Debiec-Rychter M, Sciot R, Lambrechts D, Wozniak A, Schöffski P. Histopathological and Molecular Profiling of Clear Cell Sarcoma and Correlation with Response to Crizotinib: An Exploratory Study Related to EORTC 90101 "CREATE" Trial. Cancers (Basel) 2021; 13:cancers13236057. [PMID: 34885165 PMCID: PMC8657105 DOI: 10.3390/cancers13236057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/23/2021] [Accepted: 11/28/2021] [Indexed: 11/20/2022] Open
Abstract
Simple Summary Clear cell sarcoma (CCSA) is a rare subtype of soft tissue sarcoma characterized by EWSR1 rearrangement and subsequent MET upregulation. The European Organisation for Research and Treatment of Cancer 90101 phase II trial evaluated the MET inhibitor crizotinib in CCSA but resulted in only sporadic responses. The aim of this exploratory study was to identify the molecular alterations potentially relevant for the treatment outcome by using archival CCSA samples and trial-related clinical data. We characterized MET signaling and revealed an infrequent activation of MET, which may explain the lack of response to crizotinib in the disease cohort. Based on sequencing analyses, we discovered copy number alterations, mutations and dysregulated pathways with potentially predictive or prognostic values for patients’ outcomes. This work describes the molecular heterogeneity in CCSA and provides deep insight into the biology of this ultra-rare malignancy, which may potentially lead to better therapeutic approaches. Abstract Clear cell sarcoma (CCSA) is characterized by a chromosomal translocation leading to EWSR1 rearrangement, resulting in aberrant transcription of multiple genes, including MET. The EORTC 90101 phase II trial evaluated the MET inhibitor crizotinib in CCSA but resulted in only sporadic responses. We performed an in-depth histopathological and molecular analysis of archival CCSA samples to identify alterations potentially relevant for the treatment outcome. Immunohistochemical characterization of MET signaling was performed using a tissue microarray constructed from 32 CCSA cases. The DNA from 24 available tumor specimens was analyzed by low-coverage whole-genome sequencing and whole-exome sequencing for the detection of recurrent copy number alterations (CNAs) and mutations. A pathway enrichment analysis was performed to identify the pathways relevant for CCSA tumorigenesis. Kaplan–Meier estimates and Fisher’s exact test were used to correlate the molecular findings with the clinical features related to crizotinib treatment, aiming to assess a potential association with the outcomes. The histopathological analysis showed the absence of a MET ligand and MET activation, with the presence of MET itself in most of cases. However, the expression/activation of MET downstream molecules was frequently observed, suggesting the role of other receptors in CCSA signal transduction. Using sequencing, we detected a number of CNAs at the chromosomal arm and region levels. The most common alteration was a gain of 8q24.21, observed in 83% of the cases. The loss of chromosomes 9q and 12q24 was associated with shorter survival. Based on exome sequencing, 40 cancer-associated genes were found to be mutated in more than one sample, with SRGAP3 and KMT2D as the most common alterations (each in four cases). The mutated genes encoded proteins were mainly involved in receptor tyrosine kinase signaling, polymerase-II transcription, DNA damage repair, SUMOylation and chromatin organization. Disruption in chromatin organization was correlated with longer progression-free survival in patients receiving crizotinib. Conclusions: The infrequent activation of MET may explain the lack of response to crizotinib observed in the majority of cases in the clinical trial. Our work describes the molecular heterogeneity in CCSA and provides further insight into the biology of this ultra-rare malignancy, which may potentially lead to better therapeutic approaches for CCSA.
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Affiliation(s)
- Che-Jui Lee
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, 3000 Leuven, Belgium; (C.-J.L.); (A.W.)
| | - Elodie Modave
- VIB Center for Cancer Biology, VIB and Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium; (E.M.); (B.B.); (D.L.)
| | - Bram Boeckx
- VIB Center for Cancer Biology, VIB and Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium; (E.M.); (B.B.); (D.L.)
| | - Silvia Stacchiotti
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale Tumori, 120133 Milano, Italy;
| | - Piotr Rutkowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 00001 Warsaw, Poland;
| | - Jean-Yves Blay
- Department of Medical Oncology, Centre Centre Léon Bérard & Université Claude Bernard Lyon I, 69008 Lyon, France;
| | - Maria Debiec-Rychter
- Department of Human Genetics, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium;
| | - Raf Sciot
- Department of Pathology, University Hospitals Leuven, KU Leuven, 3000 Leuven, Belgium;
| | - Diether Lambrechts
- VIB Center for Cancer Biology, VIB and Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium; (E.M.); (B.B.); (D.L.)
| | - Agnieszka Wozniak
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, 3000 Leuven, Belgium; (C.-J.L.); (A.W.)
| | - Patrick Schöffski
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, 3000 Leuven, Belgium; (C.-J.L.); (A.W.)
- Department of General Medical Oncology, Leuven Cancer Institute, University Hospitals Leuven, 3000 Leuven, Belgium
- Correspondence: ; Tel.: +32-16-341019
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Mizutani N, Hikita H, Saito Y, Myojin Y, Sato K, Urabe M, Kurahashi T, Shiode Y, Sakane S, Murai K, Nozaki Y, Kodama T, Sakamori R, Yoshida Y, Tatsumi T, Takehara T. Gab1 in livers with persistent hepatocyte apoptosis has an antiapoptotic effect and reduces chronic liver injury, fibrosis, and tumorigenesis. Am J Physiol Gastrointest Liver Physiol 2021; 320:G958-G968. [PMID: 33787344 DOI: 10.1152/ajpgi.00370.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 03/12/2021] [Accepted: 03/19/2021] [Indexed: 01/31/2023]
Abstract
Grb2-associated binder 1 (Gab1) is an adaptor protein that is important for intracellular signal transduction by receptor tyrosine kinases that are receptors for various growth factors and plays an important role in rapid liver regeneration after partial hepatectomy and during acute hepatitis. On the other hand, mild liver regeneration is induced in livers of individuals with chronic hepatitis, where hepatocyte apoptosis is persistent; however, the impact of Gab1 on such livers remains unclear. We examined the role of Gab1 in chronic hepatitis. Gab1 knockdown enhanced the decrease in cell viability and apoptosis induced by ABT-737, a Bcl-2/-xL/-w inhibitor, in BNL.CL2 cells, while cell viability and caspase activity were unchanged in the absence of ABT-737. ABT-737 treatment induced Gab1 cleavage to form p35-Gab1. p35-Gab1 was also detected in the livers of mice with hepatocyte-specific Mcl-1 knockout (KO), which causes persistent hepatocyte apoptosis. Gab1 deficiency exacerbated hepatocyte apoptosis in Mcl-1 KO mice with posttranscriptional downregulation of Bcl-XL. In BNL.CL2 cells treated with ABT-737, Gab1 knockdown posttranscriptionally suppressed Bcl-xL expression, and p35-Gab1 overexpression enhanced Bcl-xL expression. Gab1 deficiency in Mcl-1 KO mice activated STAT3 signaling in hepatocytes, increased hepatocyte proliferation, and increased the incidence of liver cancer with the exacerbation of liver fibrosis. In conclusion, Gab1 is cleaved in the presence of apoptotic stimuli and forms p35-Gab1 in hepatocytes. In chronic liver injury, the role of Gab1 in suppressing apoptosis and reducing liver damage, fibrosis, and tumorigenesis is more important than its role in liver regeneration.NEW & NOTEWORTHY Grb2-associated binder 1 (Gab1) is known to contribute to liver regeneration after acute liver injury. However, in chronic liver diseases, Gab1 plays a greater role in suppressing hepatocyte apoptosis than in liver regeneration, resulting in suppression of hepatocyte proliferation, liver fibrosis, and liver carcinogenesis.
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Affiliation(s)
- Naoki Mizutani
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hayato Hikita
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshinobu Saito
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuta Myojin
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Katsuhiko Sato
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Makiko Urabe
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohide Kurahashi
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuto Shiode
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Sadatsugu Sakane
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Kazuhiro Murai
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yasutoshi Nozaki
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Takahiro Kodama
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Ryotaro Sakamori
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuichi Yoshida
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohide Tatsumi
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tetsuo Takehara
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
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Xiao M, Zou X, Li B, Zhang B. Long non-coding RNA H19 promotes the proliferation, migration and invasion while inhibits apoptosis of hypertrophic scarring fibroblasts by targeting miR-3187-3p/GAB1 axis. Burns 2020; 47:654-664. [PMID: 32888745 DOI: 10.1016/j.burns.2020.07.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 01/19/2023]
Abstract
BACKGROUND It had been reported that long non-coding RNA (lncRNA) H19 was associated with the proliferation of fibroblasts. However, the regulatory mechanism of H19 remains unclear. Thus, the study was designed to explore the underlying mechanism of H19 in the process of Hypertrophic scarring (HS). METHODS The expression levels of H19, miR-3187-3p, and growth factor receptor binding 2-associated binding protein 1 (GAB1) in HS tissues and HS fibroblasts were measured by real-time quantitative polymerase chain reaction (RT-qPCR) assay. The biological behaviors of HS fibroblasts, such as cell proliferation, apoptosis, migration, and invasion were assessed by 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl-2H-tetrazol-3-ium bromide (MTT), colony formation, flow cytometry, and transwell assays, respectively. The protein expression level was quantified by western blot assay. The interaction association between miR-3187-3p and H19 or GAB1 was predicted by Starbase database analysis and confirmed by dual-luciferase reporter assay, respectively. RESULTS H19 was significantly increased in HS tissues and HS fibroblasts. Loss-of-functional experiments revealed that knockdown of H19 inhibited the development of HS. Moreover, silencing of H19 impeded the proliferation, migration, and invasion, while enhanced apoptosis of HS fibroblasts by increasing miR-3187-3p expression. In addition, overexpression of GAB1 could abolish miR-3187-3p overexpression-induced effects on cell proliferation, apoptosis, migration, and invasion of HS fibroblasts. Mechanistically, H19 could act as a sponge of miR-3187-3p to upregulate the expression of GAB1 in HS fibroblasts. CONCLUSION Collectively, our results revealed that H19 promoted the proliferation, migration, and invasion, while impeded apoptosis of HS fibroblasts by targeting miR-3187-3p/GAB1 axis.
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Affiliation(s)
- Mengjing Xiao
- Department of Burn and Plastic Surgery, Air Force General Hospital, 30 Fucheng Road, Beijing 100142, China
| | - Xiaofang Zou
- Department of Burn and Plastic Surgery, Air Force General Hospital, 30 Fucheng Road, Beijing 100142, China
| | - Bin Li
- Department of Burn and Plastic Surgery, Air Force General Hospital, 30 Fucheng Road, Beijing 100142, China
| | - Bo Zhang
- Air Force General Hospital, 30 Fucheng Road, Beijing 100142, China.
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Lou F, Zhang Y, Song N, Ji D, Gao T. Comprehensive Transcriptome Analysis Reveals Insights into Phylogeny and Positively Selected Genes of Sillago Species. Animals (Basel) 2020; 10:ani10040633. [PMID: 32272562 PMCID: PMC7222750 DOI: 10.3390/ani10040633] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 01/09/2023] Open
Abstract
Sillago species lives in the demersal environments and face multiple stressors, such as localized oxygen depletion, sulfide accumulation, and high turbidity. In this study, we performed transcriptome analyses of seven Sillago species to provide insights into the phylogeny and positively selected genes of this species. After de novo assembly, 82,024, 58,102, 63,807, 85,990, 102,185, 69,748, and 102,903 unigenes were generated from S. japonica, S. aeolus, S. sp.1, S. sihama, S. sp.2, S. parvisquamis, and S. sinica, respectively. Furthermore, 140 shared orthologous exon markers were identified and then applied to reconstruct the phylogenetic relationships of the seven Sillago species. The reconstructed phylogenetic structure was significantly congruent with the prevailing morphological and molecular biological view of Sillago species relationships. In addition, a total of 44 genes were identified to be positively selected, and these genes were potential participants in the stress response, material (carbohydrate, amino acid and lipid) and energy metabolism, growth and differentiation, embryogenesis, visual sense, and other biological processes. We suspected that these genes possibly allowed Sillago species to increase their ecological adaptation to multiple environmental stressors.
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Affiliation(s)
- Fangrui Lou
- Fishery College, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China;
| | - Yuan Zhang
- Fishery College, Ocean University of China, Qingdao 266003, Shandong, China; (Y.Z.); (N.S.)
| | - Na Song
- Fishery College, Ocean University of China, Qingdao 266003, Shandong, China; (Y.Z.); (N.S.)
| | - Dongping Ji
- Agricultural Machinery Service Center, Fangchenggang 538000, Guangxi, China;
| | - Tianxiang Gao
- Fishery College, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China;
- Correspondence: ; Tel.: +86-580-2089-333
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Loss of the dermis zinc transporter ZIP13 promotes the mildness of fibrosarcoma by inhibiting autophagy. Sci Rep 2019; 9:15042. [PMID: 31636298 PMCID: PMC6803768 DOI: 10.1038/s41598-019-51438-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 09/30/2019] [Indexed: 12/18/2022] Open
Abstract
Fibrosarcoma is a skin tumor that is frequently observed in humans, dogs, and cats. Despite unsightly appearance, studies on fibrosarcoma have not significantly progressed, due to a relatively mild tumor severity and a lower incidence than that of other epithelial tumors. Here, we focused on the role of a recently-found dermis zinc transporter, ZIP13, in fibrosarcoma progression. We generated two transformed cell lines from wild-type and ZIP13-KO mice-derived dermal fibroblasts by stably expressing the Simian Virus (SV) 40-T antigen. The ZIP13−/− cell line exhibited an impairment in autophagy, followed by hypersensitivity to nutrient deficiency. The autophagy impairment in the ZIP13−/− cell line was due to the low expression of LC3 gene and protein, and was restored by the DNA demethylating agent, 5-aza-2’-deoxycytidine (5-aza) treatment. Moreover, the DNA methyltransferase activity was significantly increased in the ZIP13−/− cell line, indicating the disturbance of epigenetic regulations. Autophagy inhibitors effectively inhibited the growth of fibrosarcoma with relatively minor damages to normal cells in xenograft assay. Our data show that proper control over autophagy and zinc homeostasis could allow for the development of a new therapeutic strategy to treat fibrosarcoma.
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12
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Fedele C, Ran H, Diskin B, Wei W, Jen J, Geer M, Araki K, Ozerdem U, Simeone DM, Miller G, Neel BG, Tang KH. SHP2 Inhibition Prevents Adaptive Resistance to MEK Inhibitors in Multiple Cancer Models. Cancer Discov 2018; 8:1237-1249. [PMID: 30045908 PMCID: PMC6170706 DOI: 10.1158/2159-8290.cd-18-0444] [Citation(s) in RCA: 198] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 01/04/2023]
Abstract
Adaptive resistance to MEK inhibitors (MEKi) typically occurs via induction of genes for different receptor tyrosine kinases (RTK) and/or their ligands, even in tumors of the same histotype, making combination strategies challenging. SHP2 (PTPN11) is required for RAS/ERK pathway activation by most RTKs and might provide a common resistance node. We found that combining the SHP2 inhibitor SHP099 with a MEKi inhibited the proliferation of multiple cancer cell lines in vitro PTPN11 knockdown/MEKi treatment had similar effects, whereas expressing SHP099 binding-defective PTPN11 mutants conferred resistance, demonstrating that SHP099 is on-target. SHP099/trametinib was highly efficacious in xenograft and/or genetically engineered models of KRAS-mutant pancreas, lung, and ovarian cancers and in wild-type RAS-expressing triple-negative breast cancer. SHP099 inhibited activation of KRAS mutants with residual GTPase activity, impeded SOS/RAS/MEK/ERK1/2 reactivation in response to MEKi, and blocked ERK1/2-dependent transcriptional programs. We conclude that SHP099/MEKi combinations could have therapeutic utility in multiple malignancies.Significance: MEK inhibitors show limited efficacy as single agents, in part because of the rapid development of adaptive resistance. We find that SHP2/MEK inhibitor combinations prevent adaptive resistance in multiple cancer models expressing mutant and wild-type KRAS. Cancer Discov; 8(10); 1237-49. ©2018 AACR. See related commentary by Torres-Ayuso and Brognard, p. 1210 This article is highlighted in the In This Issue feature, p. 1195.
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Affiliation(s)
- Carmine Fedele
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York,Corresponding Authors:Benjamin G Neel, Address: 522 First Avenue, Smilow Building 12th Floor, Suite 1201, New York, NY 10016, , Kwan Ho Tang, Address: 522 First Avenue, Smilow Building 7th Floor, Suite 707, New York, NY 10016, , Carmine Fedele, Address: 522 First Avenue, Smilow Building 7th Floor, Suite 707, New York, NY 10016,
| | - Hao Ran
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Brian Diskin
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Wei Wei
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Jayu Jen
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Mitchell Geer
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Kiyomi Araki
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Ugur Ozerdem
- Department of Pathology, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Diane M Simeone
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - George Miller
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Benjamin G Neel
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York,Corresponding Authors:Benjamin G Neel, Address: 522 First Avenue, Smilow Building 12th Floor, Suite 1201, New York, NY 10016, , Kwan Ho Tang, Address: 522 First Avenue, Smilow Building 7th Floor, Suite 707, New York, NY 10016, , Carmine Fedele, Address: 522 First Avenue, Smilow Building 7th Floor, Suite 707, New York, NY 10016,
| | - Kwan Ho Tang
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York,Corresponding Authors:Benjamin G Neel, Address: 522 First Avenue, Smilow Building 12th Floor, Suite 1201, New York, NY 10016, , Kwan Ho Tang, Address: 522 First Avenue, Smilow Building 7th Floor, Suite 707, New York, NY 10016, , Carmine Fedele, Address: 522 First Avenue, Smilow Building 7th Floor, Suite 707, New York, NY 10016,
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Fedele C, Ran H, Diskin B, Wei W, Jen J, Geer MJ, Araki K, Ozerdem U, Simeone DM, Miller G, Neel BG, Tang KH. SHP2 Inhibition Prevents Adaptive Resistance to MEK Inhibitors in Multiple Cancer Models. Cancer Discov 2018. [PMID: 30045908 DOI: 10.1158/2159-8290.cd-18-0444] [] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adaptive resistance to MEK inhibitors (MEKi) typically occurs via induction of genes for different receptor tyrosine kinases (RTK) and/or their ligands, even in tumors of the same histotype, making combination strategies challenging. SHP2 (PTPN11) is required for RAS/ERK pathway activation by most RTKs and might provide a common resistance node. We found that combining the SHP2 inhibitor SHP099 with a MEKi inhibited the proliferation of multiple cancer cell lines in vitro PTPN11 knockdown/MEKi treatment had similar effects, whereas expressing SHP099 binding-defective PTPN11 mutants conferred resistance, demonstrating that SHP099 is on-target. SHP099/trametinib was highly efficacious in xenograft and/or genetically engineered models of KRAS-mutant pancreas, lung, and ovarian cancers and in wild-type RAS-expressing triple-negative breast cancer. SHP099 inhibited activation of KRAS mutants with residual GTPase activity, impeded SOS/RAS/MEK/ERK1/2 reactivation in response to MEKi, and blocked ERK1/2-dependent transcriptional programs. We conclude that SHP099/MEKi combinations could have therapeutic utility in multiple malignancies.Significance: MEK inhibitors show limited efficacy as single agents, in part because of the rapid development of adaptive resistance. We find that SHP2/MEK inhibitor combinations prevent adaptive resistance in multiple cancer models expressing mutant and wild-type KRAS. Cancer Discov; 8(10); 1237-49. ©2018 AACR. See related commentary by Torres-Ayuso and Brognard, p. 1210 This article is highlighted in the In This Issue feature, p. 1195.
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Affiliation(s)
- Carmine Fedele
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York.
| | - Hao Ran
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Brian Diskin
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Wei Wei
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Jayu Jen
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Mitchell J Geer
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Kiyomi Araki
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Ugur Ozerdem
- Department of Pathology, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Diane M Simeone
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York
| | - George Miller
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, NYU Langone Health, New York, New York
| | - Benjamin G Neel
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York.
| | - Kwan Ho Tang
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, New York.
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Sun W, Zhang Z, Wang J, Shang R, Zhou L, Wang X, Duan J, Ruan B, Gao Y, Dai B, Qu S, Liu W, Ding R, Wang L, Wang D, Dou K. MicroRNA-150 suppresses cell proliferation and metastasis in hepatocellular carcinoma by inhibiting the GAB1-ERK axis. Oncotarget 2017; 7:11595-608. [PMID: 26871477 PMCID: PMC4905496 DOI: 10.18632/oncotarget.7292] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 01/27/2016] [Indexed: 12/19/2022] Open
Abstract
MicroRNA-150 (miR-150) is frequently dysregulated in cancer and is involved in carcinogenesis and cancer progression. In this study, we found that miR-150 was significantly downregulated in hepatocellular carcinoma (HCC) tissues compared to adjacent noncancerous tissues. Low levels of miR-150 were significantly associated with worse clinicopathological characteristics and a poor prognosis for patients with HCC. miR-150 overexpression inhibited cell proliferation, migration and invasion in vitro and tumor growth and metastasis in vivo. Further experiments indicated that Grb2-associated binding protein 1 (GAB1) was a direct target of miR-150 in HCC cells. In addition, GAB1 expression was increased in HCC tissues and inversely correlated with miR-150 levels. Knockdown of GAB1 mimicked the tumor-suppressive effects of miR-150 overexpression on HCC cells, whereas restoration of GAB1 expression partially abolished the inhibitory effects. Moreover, miR-150 overexpression decreased GAB1 expression, subsequently downregulated phospho-ERK1/2 and suppressed epithelial-mesenchymal-transition (EMT). These effects caused by miR-150 overexpression were alleviated by exogenous GAB1 expression. Taken together, this study demonstrates that miR-150 may be useful as a prognostic marker and that the identified miR-150-GAB1-ERK axis is a potential therapeutic target for HCC.
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Affiliation(s)
- Wei Sun
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Zhuochao Zhang
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Jianlin Wang
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Runze Shang
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Liang Zhou
- Department of General Surgery, The 155th Central Hospital of PLA, Kaifeng, Henan, China
| | - Xing Wang
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Juanli Duan
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Bai Ruan
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yuan Gao
- Department of Hepatobiliary Surgery, The 224th Hospital of PLA, Jiamusi, Heilongjiang, China
| | - Bin Dai
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Shibin Qu
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Wei Liu
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Rui Ding
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Lin Wang
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Desheng Wang
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Kefeng Dou
- Department of Hepatobiliary Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
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15
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Li X, Li X, Ren Y, Yin Z, Quan X, Xue X, Zhou B. Polymorphisms of rs1347093 and rs1397529 are associated with lung cancer risk in northeast Chinese population. Oncotarget 2017; 8:94862-94871. [PMID: 29212272 PMCID: PMC5706918 DOI: 10.18632/oncotarget.22030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 09/23/2017] [Indexed: 11/25/2022] Open
Abstract
Lung cancer is one of the malignant tumors with the highest morbidity and mortality all over the world. Here we researched the association between two SNPs (rs1347093 in MIR217HG and rs1397529 in Gab1) and the risk of lung cancer in northeast Chinese population, including 825 cases and 766 controls. We carried out χ2 test, unconditional logistic regression analysis and crossover analysis to estimate the relationship between SNPs and lung cancer risk and the interaction between SNPs and smoking on susceptibility to lung cancer. The results indicated that rs1347093, rs1397529 polymorphisms were associated with lung cancer risk, especially with adenocarcinoma risk. Dominant genetic model of the rs1347093 was associated with reduced risk of lung cancer compared to CC genotype (AC+AA vs. CC: adjusted OR = 0.599, 95%CI = 0.418-0.858, P=0.005). For rs1347093, the similar result was found. Dominant genetic model of the rs1397529 was associated with reduced risk of lung cancer compared to AA genotype (AC+CC vs. AA: adjusted OR = 0.664, 95%CI = 0.491-0.897, P=0.008). There is no significant interaction between rs1347093, rs1397529 polymorphism and smoking on susceptibility to lung cancer. Our study might demonstrate that rs1347093 in MIR217HG and rs1397529 in Gab1 could be meaningful as the novel biomarker for lung cancer risk.
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Affiliation(s)
- Xiaoying Li
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
- Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Department of Education, Liaoning, China
| | - XueLian Li
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
- Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Department of Education, Liaoning, China
| | - Yangwu Ren
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
- Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Department of Education, Liaoning, China
| | - Zhihua Yin
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
- Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Department of Education, Liaoning, China
| | - Xiaowei Quan
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
- Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Department of Education, Liaoning, China
| | - Xiaoxia Xue
- The Third Center of Laboratory Technology and Experimental Medicine, China Medical University, Shenyang, China
| | - Baosen Zhou
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
- Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Department of Education, Liaoning, China
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Feng J, Xue S, Pang Q, Rang Z, Cui F. miR-141-3p inhibits fibroblast proliferation and migration by targeting GAB1 in keloids. Biochem Biophys Res Commun 2017; 490:302-308. [DOI: 10.1016/j.bbrc.2017.06.040] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 06/11/2017] [Indexed: 01/14/2023]
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17
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Wang J, Song W, Shen W, Yang X, Sun W, Qu S, Shang R, Ma B, Pu M, Tao K, Dou K, Li H. MicroRNA-200a Suppresses Cell Invasion and Migration by Directly Targeting GAB1 in Hepatocellular Carcinoma. Oncol Res 2017; 25:1-10. [PMID: 28081727 PMCID: PMC7840785 DOI: 10.3727/096504016x14685034103798] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
MicroRNA-200a (miR-200a) is frequently downregulated in most cancer types and plays an important role in carcinogenesis and cancer progression. In this study, we determined that miR-200a was downregulated in hepatocellular carcinoma (HCC) tissues and cell lines, consistent with the results of our previous study. Because a previous study suggested that downregulation of miR-200a is correlated with HCC metastasis, we aimed to elucidate the mechanism underlying the role of miR-200a in metastasis in HCC. Here we observed that overexpression of miR-200a resulted in suppression of HCC metastatic ability, including HCC cell migration, invasion, and metastasis, in vitro and in vivo. Furthermore, bioinformatics and luciferase reporter assays indicated that GAB1 is a direct target of miR-200a. Inhibition of GAB1 resulted in substantially decreased cell invasion and migration similar to that observed with overexpression of miR-200a in HCC cell lines, whereas restoration of GAB1 partially rescued the inhibitory effects of miR-200a. Taken together, these data provide novel information for comprehending the tumor-suppressive role of miR-200a in HCC pathogenesis through inhibition of GAB1 translation.
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18
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Hennig A, Markwart R, Esparza-Franco MA, Ladds G, Rubio I. Ras activation revisited: role of GEF and GAP systems. Biol Chem 2016; 396:831-48. [PMID: 25781681 DOI: 10.1515/hsz-2014-0257] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 03/09/2015] [Indexed: 12/13/2022]
Abstract
Ras is a prototypical small G-protein and a central regulator of growth, proliferation and differentiation processes in virtually every nucleated cell. As such, Ras becomes engaged and activated by multiple growth factors, mitogens, cytokines or adhesion receptors. Ras activation comes about by changes in the steady-state equilibrium between the inactive guanosine diphosphate (GDP)-bound and active guanosine triphosphate (GTP)-bound states of Ras, resulting in the mostly transient accumulation of Ras-GTP. Three decades of intense Ras research have disclosed various families of guanine nucleotide exchange factors (GEFs) and GTPase activating proteins (GAPs) as the two principal regulatory elements of the Ras-GDP/GTP loading status. However, with the possible exception of the GEF Sos, we still have only a rudimentary knowledge of the precise role played by many GEF and GAP members in the signalling network upstream of Ras. As for GAPs, we even lack the fundamental understanding of whether they function as genuine signal transducers in the context of growth factor-elicited Ras activation or rather act as passive modulators of the Ras-GDP/GTP cycle. Here we sift through the large body of Ras literature and review the relevant data for understanding the participation and precise role played by GEFs and GAPs in the process of Ras activation.
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Gab1 regulates SDF-1-induced progression via inhibition of apoptosis pathway induced by PI3K/AKT/Bcl-2/BAX pathway in human chondrosarcoma. Tumour Biol 2015; 37:1141-9. [PMID: 26276357 DOI: 10.1007/s13277-015-3815-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 07/20/2015] [Indexed: 10/23/2022] Open
Abstract
In recent decades, the stromal cell-derived factor-l (SDF-1) and Gab1 have been investigated to be involved in oncogenesis. However, it is scarcely reported that SDF-1-Gab1 pathway mediates proliferation and apoptosis in human chondrosarcoma (CS). In this study, we assessed the expression of Gab1 in 90 CS solid tumors by immunohistochemistry, immunoblotting, and qRT-PCR, and then, some in vitro assays were also applied to CS cells treated with SDF-1. We observed that the overexpression of Gab1 was positively correlated with lung metastasis and recurrence, and acts as an independent prognostic factor for CS patients. Gab1 expression was up-regulated in response to SDF-1 stimulation in CS cell line JJ012, SW1353, L3252. Overexpression of Gab1 increased Bcl-2/BAX ratio to promote cell growth via PI3K/AKT. On the other hand, silencing of Gab1 accelerated apoptosis and repressed the growth of CS cells, which further caused the inhibition of G1/S phase transition and decreased invasion capacity in CS cell lines. In vivo assay identified that the knockdown of Gab1 interfered with the tumor mass formation. In conclusion, our data identified overexpression of Gab1 in CS tissues, and Gab1 can be recommended as a novel biomarker for diagnosis and prognosis in patients with CS. Additionally, PI3K/AKT/Bcl-2/BAX axis was involved in Gab1-induced CS progression, indicating Gab1 might act as a new target for the treatment of CS patients.
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20
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Garay C, Judge G, Lucarelli S, Bautista S, Pandey R, Singh T, Antonescu CN. Epidermal growth factor-stimulated Akt phosphorylation requires clathrin or ErbB2 but not receptor endocytosis. Mol Biol Cell 2015; 26:3504-19. [PMID: 26246598 PMCID: PMC4591694 DOI: 10.1091/mbc.e14-09-1412] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 07/31/2015] [Indexed: 12/20/2022] Open
Abstract
Upon ligand binding, the epidermal growth factor receptor (EGFR) activates signaling and undergoes endocytosis. EGFR signaling leading to Akt activation is impaired by perturbation of clathrin but not by inhibition of internalization through perturbation of dynamin. Clathrin may thus directly regulate receptor signaling at the cell surface. Epidermal growth factor (EGF) binding to its receptor (EGFR) activates several signaling intermediates, including Akt, leading to control of cell survival and metabolism. Concomitantly, ligand-bound EGFR is incorporated into clathrin-coated pits—membrane structures containing clathrin and other proteins—eventually leading to receptor internalization. Whether clathrin might regulate EGFR signaling at the plasma membrane before vesicle scission is poorly understood. We compared the effect of clathrin perturbation (preventing formation of, or receptor recruitment to, clathrin structures) to that of dynamin2 (allowing formation of clathrin structures but preventing EGFR internalization) under conditions in which EGFR endocytosis is clathrin dependent. Clathrin perturbation by siRNA gene silencing, with the clathrin inhibitor pitstop2, or knocksideways silencing inhibited EGF-simulated Gab1 and Akt phosphorylation in ARPE-19 cells. In contrast, perturbation of dynamin2 with inhibitors or by siRNA gene silencing did not affect EGF-stimulated Gab1 or Akt phosphorylation. EGF stimulation enriched Gab1 and phospho-Gab1 within clathrin structures. ARPE-19 cells have low ErbB2 expression, and overexpression and knockdown experiments revealed that robust ErbB2 expression bypassed the requirement for clathrin for EGF-stimulated Akt phosphorylation. Thus clathrin scaffolds may represent unique plasma membrane signaling microdomains required for signaling by certain receptors, a function that can be separated from vesicle formation.
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Affiliation(s)
- Camilo Garay
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Gurjeet Judge
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Stefanie Lucarelli
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Stephen Bautista
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Rohan Pandey
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Tanveer Singh
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Costin N Antonescu
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
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Bai R, Weng C, Dong H, Li S, Chen G, Xu Z. MicroRNA-409-3p suppresses colorectal cancer invasion and metastasis partly by targeting GAB1 expression. Int J Cancer 2015; 137:2310-22. [PMID: 25991585 DOI: 10.1002/ijc.29607] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 05/03/2015] [Accepted: 05/11/2015] [Indexed: 12/19/2022]
Abstract
Colorectal cancer (CRC) is one of the most common cancers worldwide and its metastasis accounts for the majority of deaths. However, the molecular mechanisms underlying CRC progression are not well characterized. In this study, we identified miR-409-3p as a tumor suppressor of CRC. MiR-409-3p expression was significantly downregulated in CRC tissue compared to adjacent non-tumor tissue, and reduced miR-409-3p expression was correlated with CRC metastasis. In vitro and in vivo studies revealed that miR-409-3p negatively regulated CRC metastatic capacities, including suppressing cancer cell migration, invasion and metastasis. To explore the mechanism of action of miR-409-3p, we adopted a pathway and pathophysiological event-based target screening and validation approach, and found nine known metastasis-related genes as potential targets. The 3'-UTR binding assays between the candidates and miR-409-3p suggested that only GAB1, NR4A2 and LMO4 were directly regulated by the miRNA. However, endogenous expression analysis revealed that only GAB1 was modulated by miR-409-3p in CRC cells at both the mRNA and protein levels. Furthermore, we provided evidence to conclude that GAB1 was partially responsible for miR-409-3p-mediated metastasis. Taken together, our data demonstrate that miR-409-3p is a metastatic suppressor, and post-transcriptional inhibition of the oncoprotein GAB1 is one of the mechanisms of action of this miRNA. Our finding suggests miR-409-3p might be a novel target for CRC metastasis treatment.
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Affiliation(s)
- Rongpan Bai
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Chunhua Weng
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China
| | - Haojie Dong
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Siqi Li
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Guangdi Chen
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhengping Xu
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
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22
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Gab1 regulates proliferation and migration through the PI3K/Akt signaling pathway in intrahepatic cholangiocarcinoma. Tumour Biol 2015; 36:8367-77. [PMID: 26014518 DOI: 10.1007/s13277-015-3590-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 05/19/2015] [Indexed: 01/04/2023] Open
Abstract
Intrahepatic cholangiocarcinoma is the second most common primary malignant tumor of the liver, and it originates from the intrahepatic biliary duct epithelium. Prognosis is poor due to lack of effective comprehensive treatments. In this study, we assessed the expression of Gab1, VEGFR-2, and MMP-9 in intrahepatic cholangiocarcinoma solid tumors by immunohistochemistry and determined whether their expression was associated with clinical and pathological features. We found that expression of Gab1, VEGFR-2, and MMP-9 was highly and positively correlated with each other and with lymph node metastasis and TNM stage in intrahepatic cholangiocarcinoma tissues. Interference of Gab1 and VEGFR-2 expression via siRNA in the intrahepatic cholangiocarcinoma cell line RBE resulted in decreased PI3K/Akt pathway activity. Inhibition of Gab1 and VEGFR-2 expression also caused decreased cell proliferation, cell cycle arrested in G1 phase, increased apoptosis, and decreased invasion in RBE cells. These results suggest that Gab1, VEGFR-2, and MMP-9 contribute significantly to the highly malignant behavior of intrahepatic cholangiocarcinoma. The regulation of growth, apoptosis, and invasion by Gab1 through the VEGFR-2/Gab1/PI3K/Akt signaling pathway may represent potential targets for improving the treatment of intrahepatic cholangiocarcinoma.
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23
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Kizu T, Yoshida Y, Furuta K, Ogura S, Egawa M, Chatani N, Hamano M, Takemura T, Ezaki H, Kamada Y, Nishida K, Nakaoka Y, Kiso S, Takehara T. Loss of Gab1 adaptor protein in hepatocytes aggravates experimental liver fibrosis in mice. Am J Physiol Gastrointest Liver Physiol 2015; 308:G613-24. [PMID: 25617348 DOI: 10.1152/ajpgi.00289.2014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 01/18/2015] [Indexed: 01/31/2023]
Abstract
Grb2-associated binder 1 (Gab1) adaptor protein amplifies signals downstream of a broad range of growth factors/receptor tyrosine kinases. Although these signals are implicated in liver fibrogenesis, the role of Gab1 remains unclear. To elucidate the role of Gab1, liver fibrosis was examined in hepatocyte-specific Gab1-conditional knockout (Gab1CKO) mice upon bile duct ligation (BDL). Gab1CKO mice developed exacerbated liver fibrosis with activation of hepatic myofibroblasts after BDL compared with control mice. The antifibrotic role of hepatocyte Gab1 was further confirmed by another well-established mouse model of liver fibrosis using chronic injections of carbon tetrachloride. After BDL, Gab1CKO mice also displayed exacerbated liver injury, decreased hepatocyte proliferation, and enhanced liver inflammation. Furthermore, cDNA microarray analysis was used to investigate the potential molecular mechanisms of the Gab1-mediated signal in liver fibrosis, and the fibrosis-promoting factor chemokine (C-C motif) ligand 5 (Ccl5) was identified as upregulated in the livers of Gab1CKO mice following BDL. Interestingly, in vitro studies using primary hepatocytes isolated from control and Gab1CKO mice revealed that the loss of Gab1 resulted in increased hepatocyte CCL5 synthesis upon lipopolysaccharide stimulation. Finally, pharmacological antagonism of CCL5 reduced BDL-induced liver fibrosis in Gab1CKO mice. In conclusion, our results demonstrate that hepatocyte Gab1 is required for liver fibrosis and that hepatocyte CCL5 could be an important contributor to this process. Thus, we present a novel antifibrotic function of hepatocyte Gab1 in liver fibrogenesis.
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Affiliation(s)
- Takashi Kizu
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yuichi Yoshida
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Kunimaro Furuta
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Satoshi Ogura
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Mayumi Egawa
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Norihiro Chatani
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Mina Hamano
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Takayo Takemura
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hisao Ezaki
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yoshihiro Kamada
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Keigo Nishida
- Laboratory for Homeostatic Network, RCAI, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan; and
| | - Yoshikazu Nakaoka
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Shinichi Kiso
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tetsuo Takehara
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan;
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24
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Poland SP, Krstajić N, Monypenny J, Coelho S, Tyndall D, Walker RJ, Devauges V, Richardson J, Dutton N, Barber P, Li DDU, Suhling K, Ng T, Henderson RK, Ameer-Beg SM. A high speed multifocal multiphoton fluorescence lifetime imaging microscope for live-cell FRET imaging. BIOMEDICAL OPTICS EXPRESS 2015; 6:277-96. [PMID: 25780724 PMCID: PMC4354599 DOI: 10.1364/boe.6.000277] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 11/28/2014] [Accepted: 11/30/2014] [Indexed: 05/18/2023]
Abstract
We demonstrate diffraction limited multiphoton imaging in a massively parallel, fully addressable time-resolved multi-beam multiphoton microscope capable of producing fluorescence lifetime images with sub-50ps temporal resolution. This imaging platform offers a significant improvement in acquisition speed over single-beam laser scanning FLIM by a factor of 64 without compromising in either the temporal or spatial resolutions of the system. We demonstrate FLIM acquisition at 500 ms with live cells expressing green fluorescent protein. The applicability of the technique to imaging protein-protein interactions in live cells is exemplified by observation of time-dependent FRET between the epidermal growth factor receptor (EGFR) and the adapter protein Grb2 following stimulation with the receptor ligand. Furthermore, ligand-dependent association of HER2-HER3 receptor tyrosine kinases was observed on a similar timescale and involved the internalisation and accumulation or receptor heterodimers within endosomes. These data demonstrate the broad applicability of this novel FLIM technique to the spatio-temporal dynamics of protein-protein interaction.
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Affiliation(s)
- Simon P. Poland
- Division of Cancer Studies, Guy’s Campus, Kings College, London,
UK
- Randall Division of Cell and Molecular Biophysics, Guy’s Campus, Kings College, London,
UK
| | - Nikola Krstajić
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Edinburgh,
UK
| | - James Monypenny
- Division of Cancer Studies, Guy’s Campus, Kings College, London,
UK
- Randall Division of Cell and Molecular Biophysics, Guy’s Campus, Kings College, London,
UK
| | - Simao Coelho
- Division of Cancer Studies, Guy’s Campus, Kings College, London,
UK
- Randall Division of Cell and Molecular Biophysics, Guy’s Campus, Kings College, London,
UK
| | - David Tyndall
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Edinburgh,
UK
| | - Richard J. Walker
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Edinburgh,
UK
- Photon-Force Ltd., Edinburgh,
UK
| | - Viviane Devauges
- Division of Cancer Studies, Guy’s Campus, Kings College, London,
UK
- Randall Division of Cell and Molecular Biophysics, Guy’s Campus, Kings College, London,
UK
| | - Justin Richardson
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Edinburgh,
UK
- Photon-Force Ltd., Edinburgh,
UK
| | - Neale Dutton
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Edinburgh,
UK
| | - Paul Barber
- Gray Institute for Radiation Oncology & Biology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford OX3 7DQ
UK
| | - David Day-Uei Li
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral Street, Glasgow, G4 0RE,
UK
| | - Klaus Suhling
- Department of Physics, King's College London, Strand, London,
UK
| | - Tony Ng
- Division of Cancer Studies, Guy’s Campus, Kings College, London,
UK
- Randall Division of Cell and Molecular Biophysics, Guy’s Campus, Kings College, London,
UK
- UCL Cancer Institute, Paul O'Gorman Building, University College London, London WC1E 6DD,
UK
| | - Robert K. Henderson
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Edinburgh,
UK
| | - Simon M. Ameer-Beg
- Division of Cancer Studies, Guy’s Campus, Kings College, London,
UK
- Randall Division of Cell and Molecular Biophysics, Guy’s Campus, Kings College, London,
UK
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25
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Leung KK, Hause RJ, Barkinge JL, Ciaccio MF, Chuu CP, Jones RB. Enhanced prediction of Src homology 2 (SH2) domain binding potentials using a fluorescence polarization-derived c-Met, c-Kit, ErbB, and androgen receptor interactome. Mol Cell Proteomics 2014; 13:1705-23. [PMID: 24728074 PMCID: PMC4083110 DOI: 10.1074/mcp.m113.034876] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Many human diseases are associated with aberrant regulation of phosphoprotein signaling networks. Src homology 2 (SH2) domains represent the major class of protein domains in metazoans that interact with proteins phosphorylated on the amino acid residue tyrosine. Although current SH2 domain prediction algorithms perform well at predicting the sequences of phosphorylated peptides that are likely to result in the highest possible interaction affinity in the context of random peptide library screens, these algorithms do poorly at predicting the interaction potential of SH2 domains with physiologically derived protein sequences. We employed a high throughput interaction assay system to empirically determine the affinity between 93 human SH2 domains and phosphopeptides abstracted from several receptor tyrosine kinases and signaling proteins. The resulting interaction experiments revealed over 1000 novel peptide-protein interactions and provided a glimpse into the common and specific interaction potentials of c-Met, c-Kit, GAB1, and the human androgen receptor. We used these data to build a permutation-based logistic regression classifier that performed considerably better than existing algorithms for predicting the interaction potential of several SH2 domains.
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Affiliation(s)
| | - Ronald J Hause
- ¶Committee on Genetics, Genomics, and Systems Biology, and
| | - John L Barkinge
- From the ‡Committee on Cancer Biology, ¶Committee on Genetics, Genomics, and Systems Biology, and ‡‡Committee on Cellular and Molecular Physiology, The Ben May Department for Cancer Research and the Institute for Genomics and Systems Biology, The Gwen and Jules Knapp Center for Biomedical Discovery, University of Chicago, Chicago, Illinois 60637
| | - Mark F Ciaccio
- ‡‡Committee on Cellular and Molecular Physiology, The Ben May Department for Cancer Research and the Institute for Genomics and Systems Biology, The Gwen and Jules Knapp Center for Biomedical Discovery, University of Chicago, Chicago, Illinois 60637
| | - Chih-Pin Chuu
- From the ‡Committee on Cancer Biology, ¶Committee on Genetics, Genomics, and Systems Biology, and ‡‡Committee on Cellular and Molecular Physiology, The Ben May Department for Cancer Research and the Institute for Genomics and Systems Biology, The Gwen and Jules Knapp Center for Biomedical Discovery, University of Chicago, Chicago, Illinois 60637
| | - Richard B Jones
- From the ‡Committee on Cancer Biology, ¶Committee on Genetics, Genomics, and Systems Biology, and
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26
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Schackmann RCJ, Klarenbeek S, Vlug EJ, Stelloo S, van Amersfoort M, Tenhagen M, Braumuller TM, Vermeulen JF, van der Groep P, Peeters T, van der Wall E, van Diest PJ, Jonkers J, Derksen PWB. Loss of p120-catenin induces metastatic progression of breast cancer by inducing anoikis resistance and augmenting growth factor receptor signaling. Cancer Res 2013; 73:4937-49. [PMID: 23733751 DOI: 10.1158/0008-5472.can-13-0180] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Metastatic breast cancer remains the chief cause of cancer-related death among women in the Western world. Although loss of cell-cell adhesion is key to breast cancer progression, little is known about the underlying mechanisms that drive tumor invasion and metastasis. Here, we show that somatic loss of p120-catenin (p120) in a conditional mouse model of noninvasive mammary carcinoma results in formation of stromal-dense tumors that resemble human metaplastic breast cancer and metastasize to lungs and lymph nodes. Loss of p120 in anchorage-dependent breast cancer cell lines strongly promoted anoikis resistance through hypersensitization of growth factor receptor (GFR) signaling. Interestingly, p120 deletion also induced secretion of inflammatory cytokines, a feature that likely underlies the formation of the prometastatic microenvironment in p120-negative mammary carcinomas. Our results establish a preclinical platform to develop tailored intervention regimens that target GFR signals to treat p120-negative metastatic breast cancers.
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Affiliation(s)
- Ron C J Schackmann
- Department of Pathology, Cancer Center, and Division of Internal Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
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27
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Fan YX, Wong L, Marino MP, Ou W, Shen Y, Wu WJ, Wong KK, Reiser J, Johnson GR. Acquired substrate preference for GAB1 protein bestows transforming activity to ERBB2 kinase lung cancer mutants. J Biol Chem 2013; 288:16895-16904. [PMID: 23612964 DOI: 10.1074/jbc.m112.434217] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Activating mutations in the αC-β4 loop of the ERBB2 kinase domain, such as ERBB2(YVMA) and ERBB2(G776VC), have been identified in human lung cancers and found to drive tumor formation. Here we observe that the docking protein GAB1 is hyper-phosphorylated in carcinomas from transgenic mice and in cell lines expressing these ERBB2 cancer mutants. Using dominant negative GAB1 mutants lacking canonical tyrosine residues for SHP2 and PI3K interactions or lentiviral shRNA that targets GAB1, we demonstrate that GAB1 phosphorylation is required for ERBB2 mutant-induced cell signaling, cell transformation, and tumorigenesis. An enzyme kinetic analysis comparing ERBB2(YVMA) to wild type using physiologically relevant peptide substrates reveals that ERBB2(YVMA) kinase adopts a striking preference for GAB1 phosphorylation sites as evidenced by ∼150-fold increases in the specificity constants (kcat/Km) for several GAB1 peptides, and this change in substrate selectivity was predominantly attributed to the peptide binding affinities as reflected by the apparent Km values. Furthermore, we demonstrate that ERBB2(YVMA) phosphorylates GAB1 protein ∼70-fold faster than wild type ERBB2 in vitro. Notably, the mutation does not significantly alter the Km for ATP or sensitivity to lapatinib, suggesting that, unlike EGFR lung cancer mutants, the ATP binding cleft of the kinase is not significantly changed. Taken together, our results indicate that the acquired substrate preference for GAB1 is critical for the ERBB2 mutant-induced oncogenesis.
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Affiliation(s)
- Ying-Xin Fan
- Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Bethesda, Maryland 20892.
| | - Lily Wong
- Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Bethesda, Maryland 20892
| | - Michael P Marino
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Bethesda, Maryland 20892
| | - Wu Ou
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Bethesda, Maryland 20892
| | - Yi Shen
- Division of Monoclonal Antibodies, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland 20892
| | - Wen Jin Wu
- Division of Monoclonal Antibodies, Center for Drug Evaluation and Research, Food and Drug Administration, Bethesda, Maryland 20892
| | - Kwok-Kin Wong
- Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115
| | - Jakob Reiser
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Bethesda, Maryland 20892
| | - Gibbes R Johnson
- Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Bethesda, Maryland 20892.
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28
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G-CSF receptor activation of the Src kinase Lyn is mediated by Gab2 recruitment of the Shp2 phosphatase. Blood 2011; 118:1077-86. [PMID: 21636860 DOI: 10.1182/blood-2009-12-261636] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Src activation involves the coordinated regulation of positive and negative tyrosine phosphorylation sites. The mechanism whereby receptor tyrosine kinases, cytokine receptors, and integrins activate Src is not known. Here, we demonstrate that granulocyte colony-stimulating factor (G-CSF) activates Lyn, the predominant Src kinase in myeloid cells, through Gab2-mediated recruitment of Shp2. After G-CSF stimulation, Lyn dynamically associates with Gab2 in a spatiotemporal manner. The dephosphorylation of phospho-Lyn Tyr507 was abrogated in Shp2-deficient cells transfected with the G-CSF receptor but intact in cells expressing phosphatase-defective Shp2. Auto-phosphorylation of Lyn Tyr396 was impaired in cells treated with Gab2 siRNA. The constitutively activated Shp2E76A directed the dephosphorylation of phospho-Lyn Tyr507 in vitro. Tyr507 did not undergo dephosphorylation in G-CSF-stimulated cells expressing a mutant Gab2 unable to bind Shp2. We propose that Gab2 forms a complex with Lyn and after G-CSF stimulation, Gab2 recruits Shp2, which dephosphorylates phospho-Lyn Tyr507, leading to Lyn activation.
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29
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p140Cap dual regulation of E-cadherin/EGFR cross-talk and Ras signalling in tumour cell scatter and proliferation. Oncogene 2010; 29:3677-90. [DOI: 10.1038/onc.2010.128] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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30
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Weng T, Mao F, Wang Y, Sun Q, Li R, Yang G, Zhang X, Luo J, Feng GS, Yang X. Osteoblastic molecular scaffold Gab1 is required for maintaining bone homeostasis. J Cell Sci 2010; 123:682-9. [PMID: 20124419 DOI: 10.1242/jcs.058396] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The Grb2-associated binder 1 (Gab1), which serves as a scaffolding adaptor protein, plays a crucial role in transmitting key signals that control cell growth, differentiation and function from multiple receptors. However, its biological role in osteoblast activity and postnatal bone metabolism remains unclear. To elucidate the in vivo function of Gab1 in postnatal bone remodeling, we generated osteoblast-specific Gab1 knockout mice. Disruption of Gab1 expression in osteoblasts led to decreased trabecular bone mass with a reduced bone formation rate and a decreased bone resorption. Bones from Gab1 mutants also exhibited inferior mechanical properties. Moreover, primary osteoblasts from Gab1 mutant mice demonstrated markedly suppressed osteoblast mineralization, increased susceptibility to apoptosis and decreased expression of receptor activator of NF-kappaB ligand (RANKL). Activation of serine-threonine Akt kinase and extracellular signal-regulated kinase in response to insulin and insulin-like growth factor 1 was attenuated in Gab1 mutant osteoblasts. Our results show that Gab1-mediated signals in osteoblasts are crucial for normal postnatal bone homeostasis.
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Affiliation(s)
- Tujun Weng
- State Key Laboratory of Proteomics, Genetic Laboratory of Development and Disease, Institute of Biotechnology, Beijing 100071, PR China
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31
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Caron C, Spring K, Laramée M, Chabot C, Cloutier M, Gu H, Royal I. Non-redundant roles of the Gab1 and Gab2 scaffolding adapters in VEGF-mediated signalling, migration, and survival of endothelial cells. Cell Signal 2009; 21:943-53. [PMID: 19233262 DOI: 10.1016/j.cellsig.2009.02.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2008] [Revised: 02/02/2009] [Accepted: 02/10/2009] [Indexed: 01/07/2023]
Abstract
Gab1 was previously described as a positive modulator of Akt, Src, ERK1/2, endothelial cell migration, and capillary formation in response to vascular endothelial growth factor (VEGF). However, its involvement in endothelial cell survival, as well as the potential contribution of the other family member Gab2 to signalling and biological responses remained unknown. Here, we show that Gab2 is tyrosine phosphorylated in a Grb2-dependent manner downstream of activated VEGF receptor-2 (VEGFR2), and that it associates with signalling proteins including PI3K and SHP2, but apparently not with the receptor. Similarly to Gab1, over-expression of Gab2 induces endothelial cell migration in response to VEGF, whereas its depletion using siRNAs results in its reduction. Importantly, depletion of both Gab1 and Gab2 leads to an even greater inhibition of VEGF-induced cell migration. However, contrary to what has been reported for Gab1, the silencing of Gab2 results in increased Src, Akt and ERK1/2 activation, slightly reduced p38 phosphorylation, and up-regulation of Gab1 protein levels. Accordingly, re-expression of Gab2 in Gab2-/- fibroblasts leads to opposite results, suggesting that the modulation of both Gab2 and Gab1 expression in these conditions might contribute to the impaired signalling observed. Consistent with their opposite roles on Akt, the depletion of Gab1, but not of Gab2, results in reduced FOXO1 phosphorylation and VEGF-mediated endothelial cell survival. Mutation of VEGFR2 Y801 and Y1214, which abrogates the phosphorylation of Gab1, also correlates with inhibition of Akt. Altogether, these results underscore the non-redundant and essential roles of Gab1 and Gab2 in endothelial cells, and suggest major contributions of these proteins during in vivo angiogenesis.
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Affiliation(s)
- Christine Caron
- Centre de recherche du Centre Hospitalier de l'Université de Montréal, 1560 rue Sherbrooke est, Montréal, Québec, Canada.
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32
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Deng Y, Zhang M, Riedel H. Mitogenic roles of Gab1 and Grb10 as direct cellular partners in the regulation of MAP kinase signaling. J Cell Biochem 2008; 105:1172-82. [DOI: 10.1002/jcb.21829] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Koyama T, Nakaoka Y, Fujio Y, Hirota H, Nishida K, Sugiyama S, Okamoto K, Yamauchi-Takihara K, Yoshimura M, Mochizuki S, Hori M, Hirano T, Mochizuki N. Interaction of scaffolding adaptor protein Gab1 with tyrosine phosphatase SHP2 negatively regulates IGF-I-dependent myogenic differentiation via the ERK1/2 signaling pathway. J Biol Chem 2008; 283:24234-44. [PMID: 18577518 DOI: 10.1074/jbc.m803907200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Grb2-associated binder 1 (Gab1) coordinates various receptor tyrosine kinase signaling pathways. Although skeletal muscle differentiation is regulated by some growth factors, it remains elusive whether Gab1 coordinates myogenic signals. Here, we examined the molecular mechanism of insulin-like growth factor-I (IGF-I)-mediated myogenic differentiation, focusing on Gab1 and its downstream signaling. Gab1 underwent tyrosine phosphorylation and subsequent complex formation with protein-tyrosine phosphatase SHP2 upon IGF-I stimulation in C2C12 myoblasts. On the other hand, Gab1 constitutively associated with phosphatidylinositol 3-kinase regulatory subunit p85. To delineate the role of Gab1 in IGF-I-dependent signaling, we examined the effect of adenovirus-mediated forced expression of wild-type Gab1 (Gab1(WT)), mutated Gab1 that is unable to bind SHP2 (Gab1(DeltaSHP2)), or mutated Gab1 that is unable to bind p85 (Gab1(Deltap85)), on the differentiation of C2C12 myoblasts. IGF-I-induced myogenic differentiation was enhanced in myoblasts overexpressing Gab1(DeltaSHP2), but inhibited in those overexpressing either Gab1(WT) or Gab1(Deltap85). Conversely, IGF-I-induced extracellular signal-regulated kinase 1/2 (ERK1/2) activation was significantly repressed in myoblasts overexpressing Gab1(DeltaSHP2) but enhanced in those overexpressing either Gab1(WT) or Gab1(Deltap85). Furthermore, small interference RNA-mediated Gab1 knockdown enhanced myogenic differentiation. Overexpression of catalytic-inactive SHP2 modulated IGF-I-induced myogenic differentiation and ERK1/2 activation similarly to that of Gab1(DeltaSHP2), suggesting that Gab1-SHP2 complex inhibits IGF-I-dependent myogenesis through ERK1/2. Consistently, the blockade of ERK1/2 pathway reversed the inhibitory effect of Gab1(WT) overexpression on myogenic differentiation, and constitutive activation of the ERK1/2 pathway suppressed the enhanced myogenic differentiation by overexpression of Gab1(DeltaSHP2). Collectively, these data suggest that the Gab1-SHP2-ERK1/2 signaling pathway comprises an inhibitory axis for IGF-I-dependent myogenic differentiation.
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Affiliation(s)
- Tatsuya Koyama
- Department of Structural Analysis, National Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, Japan
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Quinchia-Rios BH, Guerrero M, Abozeid S, Bainbridge B, Darveau R, Compton T, Bertics PJ. Down-regulation of epidermal growth factor receptor-dependent signaling by Porphyromonas gingivalis lipopolysaccharide in life-expanded human gingival fibroblasts. J Periodontal Res 2008; 43:290-304. [PMID: 18221293 DOI: 10.1111/j.1600-0765.2007.01029.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND OBJECTIVE Human gingival fibroblasts exhibit proliferative responses following epidermal growth factor exposure, which are thought to enhance periodontal regeneration in the absence of bacterial products such as lipopolysacharide. However, lipopolysaccharide challenge activates human gingival fibroblasts to release several inflammatory mediators that contribute to the immune response associated with periodontitis and attenuate wound repair. We tested the hypothesis that Porphyromonas gingivalis lipopolysaccharide-activated signaling pathways down-regulate epidermal growth factor receptor-dependent events. MATERIAL AND METHODS To study lipopolysaccharide/epidermal growth factor interactions in human gingival fibroblasts, we introduced the catalytic subunit of human telomerase into human gingival fibroblasts, thereby generating a more long-lived cellular model. These cells were characterized and evaluated for lipopolysaccharide/epidermal growth factor responsiveness and regulation of epidermal growth factor-dependent pathways. RESULTS Comparison of human telomerase-transduced gingival fibroblasts with human gingival fibroblasts revealed that both cell lines exhibit a spindle-like morphology and express similar levels of epidermal growth factor receptor, CD14 and Toll-like receptors 2 and 4. Importantly, human telomerase-transduced gingival fibroblasts proliferation rates are increased 5-9 fold over human gingival fibroblasts and exhibit a longer life span in culture. In addition, human telomerase-transduced gingival fibroblasts and human gingival fibroblasts exhibit comparable profiles of mitogen-activated protein kinase kinase (extracellular signal-regulated kinase 1/2) activation upon epidermal growth factor or P. gingivalis lipopolysaccharide administration. Interestingly, treatment with P. gingivalis lipopolysaccharide leads to a down-regulation of epidermal growth factor-dependent extracellular signal-regulated kinase 1/2, p38 and cyclic-AMP response element binding protein phosphorylation in both cell types. CONCLUSION These studies demonstrate that human telomerase-transduced gingival fibroblasts exhibit an extended life span and recapitulate human gingival fibroblasts biology. Moreover, this system has allowed for the first demonstration of lipopolysaccharide down-regulation of epidermal growth factor activated pathways in human gingival fibroblasts and should facilitate the analysis of signaling events relevant to the pathogenesis and treatment of periodontitis.
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Affiliation(s)
- B H Quinchia-Rios
- University of Wisconsin-Madison, Department of Biomolecular Chemistry, Madison, WI 53706, USA
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35
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Schaeper U, Vogel R, Chmielowiec J, Huelsken J, Rosario M, Birchmeier W. Distinct requirements for Gab1 in Met and EGF receptor signaling in vivo. Proc Natl Acad Sci U S A 2007; 104:15376-81. [PMID: 17881575 PMCID: PMC2000540 DOI: 10.1073/pnas.0702555104] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Gab1 is a multiadaptor protein that has been shown to be required for multiple processes in embryonic development and oncogenic transformation. Gab1 functions by amplifying signal transduction downstream of various receptor tyrosine kinases through recruitment of multiple signaling effectors, including phosphatidylinositol 3-kinase and Shp2. Until now, the functional significance of individual interactions in vivo was not known. Here we have generated knockin mice that carry point mutations in either the P13K or Shp2 binding sites of Gab1. We show that different effector interactions with Gab1 play distinct biological roles downstream of Gab1 during the development of different organs. Recruitment of phosphatidylinositol 3-kinase by Gab1 is essential for EGF receptor-mediated embryonic eyelid closure and keratinocyte migration, and the Gab1-Shp2 interaction is crucial for Met receptor-directed placental development and muscle progenitor cell migration to the limbs. Furthermore, we investigate the dual association of Gab1 with the Met receptor. By analyzing knockin mice with mutations in the Grb2 or Met binding site of Gab1, we show that the requirements for Gab1 recruitment to Met varies in different biological contexts. Either the direct or the indirect interaction of Gab1 with Met is sufficient for Met-dependent muscle precursor cell migration, whereas both modes of interaction are required and neither is sufficient for placenta development, liver growth, and palatal shelf closure. These data demonstrate that Gab1 induces different biological responses through the recruitment of distinct effectors and that different modes of recruitment for Gab1 are required in different organs.
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Affiliation(s)
- Ute Schaeper
- Max Delbrueck Center for Molecular Medicine, Robert-Roessle-Strasse 10, 13125 Berlin, Germany
| | - Regina Vogel
- Max Delbrueck Center for Molecular Medicine, Robert-Roessle-Strasse 10, 13125 Berlin, Germany
| | - Jolanta Chmielowiec
- Max Delbrueck Center for Molecular Medicine, Robert-Roessle-Strasse 10, 13125 Berlin, Germany
| | - Joerg Huelsken
- Max Delbrueck Center for Molecular Medicine, Robert-Roessle-Strasse 10, 13125 Berlin, Germany
| | - Marta Rosario
- Max Delbrueck Center for Molecular Medicine, Robert-Roessle-Strasse 10, 13125 Berlin, Germany
| | - Walter Birchmeier
- Max Delbrueck Center for Molecular Medicine, Robert-Roessle-Strasse 10, 13125 Berlin, Germany
- To whom correspondence should be addressed. E-mail:
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36
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Nakaoka Y, Nishida K, Narimatsu M, Kamiya A, Minami T, Sawa H, Okawa K, Fujio Y, Koyama T, Maeda M, Sone M, Yamasaki S, Arai Y, Koh GY, Kodama T, Hirota H, Otsu K, Hirano T, Mochizuki N. Gab family proteins are essential for postnatal maintenance of cardiac function via neuregulin-1/ErbB signaling. J Clin Invest 2007; 117:1771-81. [PMID: 17571162 PMCID: PMC1888569 DOI: 10.1172/jci30651] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2006] [Accepted: 04/10/2007] [Indexed: 01/11/2023] Open
Abstract
Grb2-associated binder (Gab) family of scaffolding adaptor proteins coordinate signaling cascades downstream of growth factor and cytokine receptors. In the heart, among EGF family members, neuregulin-1beta (NRG-1beta, a paracrine factor produced from endothelium) induced remarkable tyrosine phosphorylation of Gab1 and Gab2 via erythroblastic leukemia viral oncogene (ErbB) receptors. We examined the role of Gab family proteins in NRG-1beta/ErbB-mediated signal in the heart by creating cardiomyocyte-specific Gab1/Gab2 double knockout mice (DKO mice). Although DKO mice were viable, they exhibited marked ventricular dilatation and reduced contractility with aging. DKO mice showed high mortality after birth because of heart failure. In addition, we noticed remarkable endocardial fibroelastosis and increase of abnormally dilated vessels in the ventricles of DKO mice. NRG-1beta induced activation of both ERK and AKT in the hearts of control mice but not in those of DKO mice. Using DNA microarray analysis, we found that stimulation with NRG-1beta upregulated expression of an endothelium-stabilizing factor, angiopoietin 1, in the hearts of control mice but not in those of DKO mice, which accounted for the pathological abnormalities in the DKO hearts. Taken together, our observations indicated that in the NRG-1beta/ErbB signaling, Gab1 and Gab2 of the myocardium are essential for both maintenance of myocardial function and stabilization of cardiac capillary and endocardial endothelium in the postnatal heart.
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Affiliation(s)
- Yoshikazu Nakaoka
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Keigo Nishida
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Masahiro Narimatsu
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Atsunori Kamiya
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takashi Minami
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hirofumi Sawa
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Katsuya Okawa
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasushi Fujio
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tatsuya Koyama
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Makiko Maeda
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Manami Sone
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Satoru Yamasaki
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuji Arai
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Gou Young Koh
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tatsuhiko Kodama
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hisao Hirota
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kinya Otsu
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Toshio Hirano
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Naoki Mochizuki
- Department of Structural Analysis, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology (RCAI), Yokohama, Japan.
Laboratory of Developmental Immunology, Osaka University Graduate School of Frontier Biosciences and Graduate School of Medicine, Osaka, Japan.
Department of Cardiovascular Dynamics, National Cardiovascular Center Research Institute, Osaka, Japan.
Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan.
Department of Molecular Pathobiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Japan.
Horizontal Medical Research Organization, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Clinical Evaluation of Medicines and Therapeutics, Osaka University Graduate School of Pharmaceutical Sciences, Osaka, Japan.
Department of Bioscience, National Cardiovascular Center Research Institute, Osaka, Japan.
Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
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37
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Abstract
The receptor for hepatocyte growth factor (HGF)/scatter factor (SF), Met, controls a program of invasive epithelial growth through the coordination of cell proliferation and survival, cell migration and epithelial morphogenesis. This process is important during embryogenesis and for organ regeneration in the adult. However, when deregulated the HGF/SF-Met signaling axis contributes to tumorigenesis and metastasis. Studies on the oncogenic activation of the Met receptor have shed light on the molecular mechanisms underlying the oncogenic activation of receptor tyrosine kinase (RTKs). More than a decade ago, work on the Met related oncogene, Tpr-Met, revealed the mechanism for activation of RTK-derived oncogenes generated following chromosomal translocation. More recently, studies on the mechanisms of downregulation of the Met RTK highlight a role for loss of downregulation in RTK oncogenic activation.
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Affiliation(s)
- P Peschard
- Department of Biochemistry, Molecular Oncology Group, McGill University Health Center, McGill University, Montréal, Québec, Canada
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38
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Goto Y, Ando T, Nishio K, Kawai S, Ishida Y, Naito M, Goto H, Hamajima N. Grb2-associated binder 1 polymorphism was associated with the risk of Helicobactor pylori infection and gastric atrophy. Int J Med Sci 2006; 4:1-6. [PMID: 17211494 PMCID: PMC1752235 DOI: 10.7150/ijms.4.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2006] [Accepted: 10/25/2006] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Various single nucleotide polymorphisms (SNPs) have explained the association between Helicobacter pylori (H. pylori) and gastric atrophy and cancer. This study investigated the associations of Grb2 associated binder 1 (Gab1) polymorphism and the combination of PTPN11 gene encoding src homology 2 domain-containing protein tyrosine phosphatase-2 (SHP2) and Gab1 gene with gastric cancer and gastric atrophy among H. pylori seropositive subjects. METHODS A single nucleotide polymorphism at intron 2 of Gab1 (JST164345) was examined for 454 Japanese health checkup examinees (126 males and 328 females) aged 35 to 85 without a history of gastric cancer and 202 gastric cancer patients (134 males and 68 females) aged 33 to 94 with pathologically confirmed diagnosis of gastric adenocarcinoma. RESULTS The decreased OR of the Gab1 A/A for H. pylori seropositivity was 0.25 (95% confidence interval (CI): 0.08-0.71). Among seropositive healthy controls, the OR of the Gab1 G/A+A/A for gastric atrophy was significant (OR=1.95, 95% CI: 1.12 -3.40). Seropositive individuals with PTPN11 G/G and Gab1 G/A+A/A demonstrated the highest risk of gastric atrophy with significance (OR=3.49, 95% CI: 1.54-7.90) relative to PTPN11 G/A+A/A and Gab1 G/G, the lowest risk combination, as a reference. However, the gene-gene interaction between PTPN11 and Gab1 was not observed (OR=1.39, 95% CI: 0.41-4.66). Compared to gastric cancer case, the Gab1 did not influence the step of atrophy/metaplasia-gastric cancer sequence. CONCLUSIONS This study represents that the Gab1 polymorphism was associated with the low risk of H. pylori infection and the high risk of gastric atrophy among seropositive healthy controls, and that seropositive individuals with PTPN11 G/G and Gab1 G/A+G/G were associated with the greatest risk of gastric atrophy. These findings require confirmation in much larger studies.
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Affiliation(s)
- Yasuyuki Goto
- Department of Preventive Medicine/Biostatistics and Medical Decision Making, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan.
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Burger A, Amemiya Y, Kitching R, Seth AK. Novel RING E3 ubiquitin ligases in breast cancer. Neoplasia 2006; 8:689-95. [PMID: 16925951 PMCID: PMC1601945 DOI: 10.1593/neo.06469] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Defects in ubiquitin E3 ligases are implicated in the pathogenesis of several human diseases, including cancer, because of their central role in the control of diverse signaling pathways. RING E3 ligases promote the ubiquitination of proteins that are essential to a variety of cellular events. Identification of which ubiquitin ligases specifically affect distinct cellular processes is essential to the development of targeted therapeutics for these diseases. Here we discuss two novel RING E3 ligases, BCA2 and RNF11, that are closely linked to human breast cancer. BCA2 E3 ligase is coregulated with estrogen receptor and plays a role in the regulation of epidermal growth factor receptor (EGF-R) trafficking. RNF11 is a small RING E3 ligase that affects transforming growth factorbeta and EGF-R signaling and is overexpressed in invasive breast cancers. These two proteins demonstrate the complexity of RING E3 ligase interactions in breast cancer and are potential targets for therapeutic interventions.
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Affiliation(s)
- Angelika Burger
- Sunnybrook Research Institute and Department of Anatomic Pathology, Sunnybrook Health Sciences Center, Toronto, Ontario, Canada
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Kostenko O, Tsacoumangos A, Crooks D, Kil SJ, Carlin C. Gab1 signaling is regulated by EGF receptor sorting in early endosomes. Oncogene 2006; 25:6604-17. [PMID: 16715136 DOI: 10.1038/sj.onc.1209675] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Although combinatorial signaling through the ErbB network is implicated in certain types of human cancer, the specifics of how particular receptors contribute to the transformed phenotype are not well understood. The goal of this study was to identify epidermal growth factor (EGF) receptor-dependent cell signaling abnormalities specifically associated with mutations in a previously described 679-LL lysosomal sorting signal, which restrict ligand-dependent receptor downregulation by promoting recycling. Importantly, the 679-LL signal is not conserved in any of the other members of the ErbB receptor family suggesting its physiological function may be tightly regulated during EGF receptor-dependent signaling. Our data indicate that cells expressing receptors with an inactive 679-AA signal are rapidly transported to Rab4+ early endosomes after they are internalized in contrast to wild-type receptors that are localized to early endocytic antigen 1 (EEA1)+ early endosomes. Divergent trafficking in early endosomes is associated with prolonged activation of p44/42 mitogen-activated protein kinases (MAPK) but not Akt. Gab1 appears to be the critical signaling molecule facilitating prolonged MAPK signaling, and activated Gab1 is recruited to early endosomes in 679-AA receptor-expressing cells. Activated Gab1 is also recruited to early endosomes in breast cancer cells characterized by high levels of EGF receptor-ErbB2 heterodimers, suggesting 679-AA expressing cells recapitulate certain aspects of EGF receptor signaling and transformation by activated ErbB2. Phosphatidylinositol 3-kinase (PI3K)-dependent membrane translocation known to be important for maintaining Gab1 activity in other settings was dispensable. We conclude that 679-LL has dual functions in EGF receptor trafficking and threshold signaling through a subset of signaling molecules including p44/42 MAPK and Gab1.
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Affiliation(s)
- O Kostenko
- The Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4970, USA
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Kiyatkin A, Aksamitiene E, Markevich NI, Borisov NM, Hoek JB, Kholodenko BN. Scaffolding protein Grb2-associated binder 1 sustains epidermal growth factor-induced mitogenic and survival signaling by multiple positive feedback loops. J Biol Chem 2006; 281:19925-38. [PMID: 16687399 PMCID: PMC2312093 DOI: 10.1074/jbc.m600482200] [Citation(s) in RCA: 137] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Grb2-associated binder 1 (GAB1) is a scaffold protein involved in numerous interactions that propagate signaling by growth factor and cytokine receptors. Here we explore in silico and validate in vivo the role of GAB1 in the control of mitogenic (Ras/MAPK) and survival (phosphatidylinositol 3-kinase (PI3K)/Akt) signaling stimulated by epidermal growth factor (EGF). We built a comprehensive mechanistic model that allows for reliable predictions of temporal patterns of cellular responses to EGF under diverse perturbations, including different EGF doses, GAB1 suppression, expression of mutant proteins, and pharmacological inhibitors. We show that the temporal dynamics of GAB1 tyrosine phosphorylation is significantly controlled by positive GAB1-PI3K feedback and negative MAPK-GAB1 feedback. Our experimental and computational results demonstrate that the essential function of GAB1 is to enhance PI3K/Akt activation and extend the duration of Ras/MAPK signaling. By amplifying positive interactions between survival and mitogenic pathways, GAB1 plays the critical role in cell proliferation and tumorigenesis.
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Affiliation(s)
- Anatoly Kiyatkin
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
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42
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Tao Y, Maegawa H, Ugi S, Ikeda K, Nagai Y, Egawa K, Nakamura T, Tsukada S, Nishio Y, Maeda S, Kashiwagi A. The transcription factor AP-2beta causes cell enlargement and insulin resistance in 3T3-L1 adipocytes. Endocrinology 2006; 147:1685-96. [PMID: 16373417 DOI: 10.1210/en.2005-1304] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have reported the association of variations in the activating protein-2beta (AP-2beta) transcription factor gene with type 2 diabetes. This gene was preferentially expressed in 3T3-L1 adipocytes in a differentiation stage-dependent manner, and preliminary experiments showed that subjects with the disease-susceptible allele showed stronger expression in adipose tissue than those without the susceptible allele. Thus, we overexpressed the AP-2beta gene in 3T3-L1 adipocytes to clarify whether AP-2beta might play a crucial role in the pathogenesis of type 2 diabetes through dysregulation of adipocyte function. In cells overexpressing AP-2beta, cells increased in size by accumulation of triglycerides accompanied by enhanced glucose uptake. On the contrary, suppression of AP-2beta expression by small interfering RNA inhibited glucose uptake. Enhancement of glucose uptake by AP-2beta overexpression was attenuated by inhibitors of phospholipase C (PLC) and atypical protein kinase Czeta/lambda (PKCzeta/lambda), but not by a phosphatidylinositol 3-kinase (PI3-K) inhibitor. Consistently, we found activation of PLC and atypical PKC, but not PI3-K, by AP-2beta expression. Furthermore, overexpression of PLCgamma enhanced glucose uptake, and this activation was inhibited by an atypical PKC inhibitor, suggesting that the enhanced glucose uptake may be mediated through PLC and atypical PKCzeta/lambda, but not PI3-K. Moreover, we observed the increased tyrosine phosphorylation of Grb2-associated binder-1 (Gab1) and its association with PLCgamma, indicating that Gab1 may be involved in AP-2beta-induced PLCgamma activation. Finally, AP-2beta overexpression was found to relate to the impaired insulin signaling. We propose that AP-2beta is a candidate gene for producing adipocyte hypertrophy and may relate to the abnormal characteristics of adipocytes observed in obesity.
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Affiliation(s)
- Yukari Tao
- Division of Endocrinology and Metabolism, Department of Medicine, Shiga University of Medical Science, Seta, Otsu, Japan
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Horie S. ADPKD: molecular characterization and quest for treatment. Clin Exp Nephrol 2006; 9:282-291. [PMID: 16362154 DOI: 10.1007/s10157-005-0367-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2004] [Accepted: 05/13/2005] [Indexed: 12/15/2022]
Abstract
Autosomal-dominant polycystic kidney disease (ADPKD) is a common hereditary disease that features multiple cystogenesis in various organs and vascular defects. The genes responsible for ADPKD, PKD1, and PKD2 have been identified, and the pathological processes of the disease are becoming clearer. This review focuses on recent findings about the molecular and cellular biology of ADPKD, and especially on PKD1. PKD1 and its product, polycystin-1, play pivotal roles in cellular differentiation because they regulate the cell cycle and because polycystin-1 is a component of adherens junctions. A possible link between polycystin-1 and PPARgamma is discussed. The extraordinarily fast research progress in this area in the last decade has now reached a stage where the development of a remedy for ADPKD might become possible in the near future.
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Affiliation(s)
- Shigeo Horie
- Department of Urology, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-ku, Tokyo, 173-8605, Japan.
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Borisov NM, Markevich NI, Hoek JB, Kholodenko BN. Trading the micro-world of combinatorial complexity for the macro-world of protein interaction domains. Biosystems 2006; 83:152-66. [PMID: 16242235 PMCID: PMC1477537 DOI: 10.1016/j.biosystems.2005.03.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2005] [Revised: 03/16/2005] [Accepted: 03/23/2005] [Indexed: 11/16/2022]
Abstract
Membrane receptors and proteins involved in signal transduction display numerous binding domains and operate as molecular scaffolds generating a variety of parallel reactions and protein complexes. The resulting combinatorial explosion of the number of feasible chemical species and, hence, different states of a network greatly impedes mechanistic modeling of signaling systems. Here we present novel general principles and identify kinetic requirements that allow us to replace a mechanistic picture of all possible micro-states and transitions by a macro-description of states of separate binding sites of network proteins. This domain-oriented approach dramatically reduces computational models of cellular signaling networks by dissecting mechanistic trajectories into the dynamics of macro- and meso-variables. We specify the conditions when the temporal dynamics of micro-states can be exactly or approximately expressed in terms of the product of the relative concentrations of separate domains. We prove that our macro-modeling approach equally applies to signaling systems with low population levels, analyzed by stochastic rather than deterministic equations. Thus, our results greatly facilitate quantitative analysis and computational modeling of multi-protein signaling networks.
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Affiliation(s)
- Nikolay M Borisov
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, 1020 Locust St., Philadelphia, PA 19107, USA
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Yutzey KE, Colbert M, Robbins J. Ras-related signaling pathways in valve development: ebb and flow. Physiology (Bethesda) 2006; 20:390-7. [PMID: 16287988 DOI: 10.1152/physiol.00035.2005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Congenital heart defects affect approximately 1 in every 100 live births, and deficits in the formation of the mitral, tricuspid, and outflow tract valves account for 20-25% of all cardiac malformations. Mutations in genes that affect Ras signaling have been identified in individuals with congenital valve disease associated with Noonan syndrome and neurofibromatosis type 1. Dissection of Ras-related signaling pathways during valvulogenesis provides seminal insight into cellular and molecular mechanisms that contribute to congenital heart disease.
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Affiliation(s)
- Katherine E Yutzey
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Research Foundation, Ohio, USA
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46
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Meng S, Chen Z, Munoz-Antonia T, Wu J. Participation of both Gab1 and Gab2 in the activation of the ERK/MAPK pathway by epidermal growth factor. Biochem J 2006; 391:143-51. [PMID: 15952937 PMCID: PMC1237148 DOI: 10.1042/bj20050229] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three members of Gab family docking proteins, Gab1, Gab2 and Gab3, have been identified in humans. Previous studies have found that the hepatocyte growth factor preferentially utilizes Gab1 for signalling, whereas Bcr-Abl selectively signals through Gab2. Gab1-SHP2 interaction has been shown to mediate ERK (extracellular-signal-regulated kinase) activation by EGF (epidermal growth factor). However, it was unclear whether EGF selectively utilizes Gab1 for signalling to ERK and whether Gab2 is dispensable in cells where Gab1 and Gab2 are co-expressed. Using T47D and MCF-7 human breast carcinoma cells that express endogenous Gab1 and Gab2, we examined the role of these docking proteins in EGF-induced ERK activation. It was found that EGF induced a similar amount of SHP2-Gab1 and SHP2-Gab2 complexes. Expression of either SHP2-binding defective Gab1 or Gab2 mutant blocked EGF-induced ERK activation. Down-regulation of either Gab1 or Gab2 by siRNAs (small interfering RNAs) effectively inhibited the EGF-stimulated ERK activation pathway and cell migration. Interestingly, the inhibitory effect of Gab1 siRNA could be rescued not only by expression of an exogenous mouse Gab1 but also by an exogenous human Gab2 and vice versa, but not by IRS1 (insulin receptor substrate 1). These results reveal that Gab2 plays a pivotal role in the EGF-induced ERK activation pathway and that it can complement the function of Gab1 in the EGF signalling pathway. Furthermore, Gab1 and Gab2 are critical signalling threshold proteins for ERK activation by EGF.
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Affiliation(s)
- Songshu Meng
- *Molecular Oncology Program, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, U.S.A
- †Department of Interdisciplinary Oncology, University of South Florida College of Medicine, Tampa, FL 33612, U.S.A
| | - Zhengming Chen
- *Molecular Oncology Program, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, U.S.A
- †Department of Interdisciplinary Oncology, University of South Florida College of Medicine, Tampa, FL 33612, U.S.A
| | - Teresita Munoz-Antonia
- *Molecular Oncology Program, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, U.S.A
- †Department of Interdisciplinary Oncology, University of South Florida College of Medicine, Tampa, FL 33612, U.S.A
| | - Jie Wu
- *Molecular Oncology Program, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, U.S.A
- †Department of Interdisciplinary Oncology, University of South Florida College of Medicine, Tampa, FL 33612, U.S.A
- ‡Department of Medical Microbiology and Immunology, University of South Florida College of Medicine, Tampa, FL 33612, U.S.A
- To whom correspondence should be addressed, at Molecular Oncology Program, SRB-3, H. Lee Moffitt Cancer Center and Research Institute (email )
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Sármay G, Angyal A, Kertész A, Maus M, Medgyesi D. The multiple function of Grb2 associated binder (Gab) adaptor/scaffolding protein in immune cell signaling. Immunol Lett 2005; 104:76-82. [PMID: 16386802 DOI: 10.1016/j.imlet.2005.11.017] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Revised: 11/17/2005] [Accepted: 11/17/2005] [Indexed: 12/16/2022]
Abstract
The Grb2 associated binder (Gab) adaptor/scaffolding protein family comprises conserved proteins: mammalian Gab1, Gab2 and Gab3, Drosophila Dos and Caenorhabditis elegans Soc1. Gab adaptors are involved in multiple signaling pathways mediated by receptor- and non-receptor protein tyrosine kinases (PTKs), and become phosphorylated upon stimulation by growth factors-, cytokines-, Ig Fc- and antigen receptors. Through its phosphorylated tyrosine containing motifs, proline-rich sequences and pleckstrin homologue (PH) domain Gab adaptors may generate an interacting platform for proteins with SH2 and SH3 domains and may transfer these molecules to the plasma membrane, thereby contributing to their activation. This review will concentrate on the function of mammalian Gab proteins in the signal transduction triggered by immune receptors.
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Affiliation(s)
- Gabriella Sármay
- Eötvös Loránd University, Department of Immunology, Pázmány Péter Sétány 1/c, Budapest 1117, Hungary.
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Sithanandam G, Smith GT, Fields JR, Fornwald LW, Anderson LM. Alternate paths from epidermal growth factor receptor to Akt in malignant versus nontransformed lung epithelial cells: ErbB3 versus Gab1. Am J Respir Cell Mol Biol 2005; 33:490-9. [PMID: 16055672 PMCID: PMC2715357 DOI: 10.1165/rcmb.2005-0049oc] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In many human lung adenocarcinoma cell lines, a pathway involving epidermal growth factor receptor (EGFR), ErbB2 and ErbB3 receptors, phosphatidyl inositol 3-kinase (PI3K), Akt, glycogen synthase kinase 3-beta (GSK3-beta), and cyclin D1 controls cell growth, survival, and invasiveness. We have investigated this pathway in paired transformed/nontransformed cell lines from murine peripheral lung epithelium, E9/E10 and A5/C10. The E9 and A5 carcinoma lines expressed ErbB3 and transforming growth factor-alpha (TGF-alpha) and responded to TGF-alpha stimulation with protein complex formation including the p85 regulatory subunit of PI3K, activation of Akt, phosphorylation of GSK3-beta, and increased cyclin D1 protein and the cell cycle. ErbB3 and TGF-alpha were not detected in the nontransformed E10 and C10 cell lines. Nevertheless, exposure of E10 or C10 cells to TGF-alpha activated PI3K and Akt and increased cyclin D1 and cell growth. The effector pathway from the EGFR to PI3K in these nontransformed cells included the adaptor Grb2, the docking protein Gab1, and the phosphatase Shp2. Gab1 was highly expressed in E10 and C10 cells but not in the malignant E9 and A5 sister lines. Complexes of EGFR/Grb2/Gab1/Shp2 after TGF-alpha stimulation were prominent only in E10 and C10 cells. Thus, alternate pathways downstream of EGFR regulate mitosis in these paired malignant versus nontransformed lung cell lines.
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Borisov NM, Markevich NI, Hoek JB, Kholodenko BN. Signaling through receptors and scaffolds: independent interactions reduce combinatorial complexity. Biophys J 2005; 89:951-66. [PMID: 15923229 PMCID: PMC1366644 DOI: 10.1529/biophysj.105.060533] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
After activation, many receptors and their adaptor proteins act as scaffolds displaying numerous docking sites and engaging multiple targets. The consequent assemblage of a variety of protein complexes results in a combinatorial increase in the number of feasible molecular species presenting different states of a receptor-scaffold signaling module. Tens of thousands of such microstates emerge even for the initial signal propagation events, greatly impeding a quantitative analysis of networks. Here, we demonstrate that the assumption of independence of molecular events occurring at distinct sites enables us to approximate a mechanistic picture of all possible microstates by a macrodescription of states of separate domains, i.e., macrostates that correspond to experimentally verifiable variables. This analysis dissects a highly branched network into interacting pathways originated by protein complexes assembled on different sites of receptors and scaffolds. We specify when the temporal dynamics of any given microstate can be expressed using the product of the relative concentrations of individual sites. The methods presented here are equally applicable to deterministic and stochastic calculations of the temporal dynamics. Our domain-oriented approach drastically reduces the number of states, processes, and kinetic parameters to be considered for quantification of complex signaling networks that propagate distinct physiological responses.
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Affiliation(s)
- Nikolay M Borisov
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
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Mattoon DR, Lamothe B, Lax I, Schlessinger J. The docking protein Gab1 is the primary mediator of EGF-stimulated activation of the PI-3K/Akt cell survival pathway. BMC Biol 2004; 2:24. [PMID: 15550174 PMCID: PMC534114 DOI: 10.1186/1741-7007-2-24] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Accepted: 11/18/2004] [Indexed: 12/02/2022] Open
Abstract
Background Gab1 is a docking protein that recruits phosphatidylinositol-3 kinase (PI-3 kinase) and other effector proteins in response to the activation of many receptor tyrosine kinases (RTKs). As the autophosphorylation sites on EGF-receptor (EGFR) do not include canonical PI-3 kinase binding sites, it is thought that EGF stimulation of PI-3 kinase and its downstream effector Akt is mediated by an indirect mechanism. Results We used fibroblasts isolated from Gab1-/- mouse embryos to explore the mechanism of EGF stimulation of the PI-3 kinase/Akt anti-apoptotic cell signaling pathway. We demonstrate that Gab1 is essential for EGF stimulation of PI-3 kinase and Akt in these cells and that these responses are mediated by complex formation between p85, the regulatory subunit of PI-3 kinase, and three canonical tyrosine phosphorylation sites on Gab1. Furthermore, complex formation between Gab1 and the protein tyrosine phosphatase Shp2 negatively regulates Gab1 mediated PI-3 kinase and Akt activation following EGF-receptor stimulation. We also demonstrate that tyrosine phosphorylation of ErbB3 may lead to recruitment and activation of PI-3 kinase and Akt in Gab1-/- MEFs. Conclusions The primary mechanism of EGF-induced stimulation of the PI-3 kinase/Akt anti-apoptotic pathway occurs via the docking protein Gab1. However, in cells expressing ErbB3, EGF and neuroregulin can stimulate PI-3 kinase and Akt activation in a Gab1-dependent or Gab1-independent manner.
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Affiliation(s)
- Dawn R Mattoon
- Department of Pharmacology, Yale University School of Medicine, PO Box 208066, New Haven, CT 06520-8066, USA
- Current address: Protometrix, Inc./Invitrogen, 688 East Main Street, Branford, CT 06405, USA
| | - Betty Lamothe
- Department of Pharmacology, Yale University School of Medicine, PO Box 208066, New Haven, CT 06520-8066, USA
- Current address: Department of Bioimmunotherapy, M.D. Anderson Cancer Center, 1515 Holcombe Blvd. Box 0143. Houston, TX 77030, USA
| | - Irit Lax
- Department of Pharmacology, Yale University School of Medicine, PO Box 208066, New Haven, CT 06520-8066, USA
| | - Joseph Schlessinger
- Department of Pharmacology, Yale University School of Medicine, PO Box 208066, New Haven, CT 06520-8066, USA
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