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Stanislovas J, Kermorgant S. c-Met-integrin cooperation: Mechanisms, tumorigenic effects, and therapeutic relevance. Front Cell Dev Biol 2022; 10:994528. [PMID: 36330337 PMCID: PMC9624249 DOI: 10.3389/fcell.2022.994528] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
c-Met is a receptor tyrosine kinase which upon activation by its ligand, the hepatocyte growth factor, mediates many important signalling pathways that regulate cellular functions such as survival, proliferation, and migration. Its oncogenic and tumorigenic signalling mechanisms, greatly contributing to cancer development and progression, are well documented. Integrins, heterogeneous adhesion receptors which facilitate cell-extracellular matrix interactions, are important in biomechanically sensitive cell adhesion and motility but also modulate diverse cell behaviour. Here we review the studies which reported cooperation between c-Met and several integrins, particularly β1 and β4, in various cell models including many tumour cell types. From the various experimental models and results analysed, we propose that c-Met-integrin cooperation occurs via inside-out or outside-in signalling. Thus, either c-Met activation triggers integrin activation and cell adhesion or integrin adhesion to its extracellular ligand triggers c-Met activation. These two modes of cooperation require the adhesive function of integrins and mostly lead to cell migration and invasion. In a third, less conventional, mode of cooperation, the integrin plays the role of a signalling adaptor for c-Met, independently from its adhesive property, leading to anchorage independent survival. Recent studies have revealed the influence of endocytic trafficking in c-Met-integrin cooperation including the adaptor function of integrin occurring on endomembranes, triggering an inside-in signalling, believed to promote survival of metastatic cells. We present the evidence of the cooperation in vivo and in human tissues and highlight its therapeutic relevance. A better understanding of the mechanisms regulating c-Met-integrin cooperation in cancer progression could lead to the design of new therapies targeting this cooperation, providing more effective therapeutic approaches than c-Met or integrin inhibitors as monotherapies used in the clinic.
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Affiliation(s)
- Justas Stanislovas
- Spatial Signalling Group, John Vane Science Centre, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Stéphanie Kermorgant
- Spatial Signalling Group, John Vane Science Centre, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
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2
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Barcus CE, Hwang PY, Morikis V, Brenot A, Pence P, Clarke M, Longmore GD. Tyrosine kinase-independent actions of DDR2 in tumor cells and cancer-associated fibroblasts influence tumor invasion, migration and metastasis. J Cell Sci 2021; 134:272035. [PMID: 34477203 PMCID: PMC8542384 DOI: 10.1242/jcs.258431] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 08/23/2021] [Indexed: 01/27/2023] Open
Abstract
Both tumor cell-intrinsic signals and tumor cell-extrinsic signals from cells within the tumor microenvironment influence tumor cell dissemination and metastasis. The fibrillar collagen receptor tyrosine kinase (RTK) discoidin domain receptor 2 (DDR2) is essential for breast cancer metastasis in mouse models, and high expression of DDR2 in tumor and tumor stromal cells is strongly associated with poorer clinical outcomes. DDR2 tyrosine kinase activity has been hypothesized to be required for the metastatic activity of DDR2; however, inhibition of DDR2 tyrosine kinase activity, along with that of other RTKs, has failed to provide clinically relevant responses in metastatic patients. Here, we show that tyrosine kinase activity-independent action of DDR2 in tumor cells can support Matrigel invasion and in vivo metastasis. Paracrine actions of DDR2 in tumor cells and cancer-associated fibroblasts (CAFs) also support tumor invasion, migration and lung colonization in vivo. These data suggest that tyrosine kinase-independent functions of DDR2 could explain failures of tyrosine kinase inhibitor treatment in metastatic breast cancer patients and highlight the need for alternative therapeutic strategies that inhibit both tyrosine kinase-dependent and -independent actions of RTKs in the treatment of breast cancer. This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Craig E. Barcus
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA
| | - Priscilla Y. Hwang
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA,College of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Vasilios Morikis
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA
| | - Audrey Brenot
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA
| | - Patrick Pence
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA
| | - Maria Clarke
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA
| | - Gregory D. Longmore
- ICCE Institute, Washington University, St Louis, MO 63110, USA,Department of Medicine (Oncology), Washington University, St Louis, MO 63110, USA,Author for correspondence ()
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3
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Kozlova NI, Morozevich GE, Gevorkian NM, Berman AE. Implication of integrins α3β1 and α5β1 in invasion and anoikis of SK-Mel-147 human melanoma cells: non-canonical functions of protein kinase Akt. Aging (Albany NY) 2020; 12:24345-24356. [PMID: 33260159 PMCID: PMC7762463 DOI: 10.18632/aging.202243] [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: 07/23/2020] [Accepted: 10/03/2020] [Indexed: 05/11/2023]
Abstract
Downregulation of integrins α3β1 and α5β1 strongly decreased cell colony formation and in vitro invasion and markedly enhanced anoikis in SK-Mel-147 human melanoma cells. These modifications were accompanied by a marked increase in the levels of active Akt protein kinase, which indicated it played a non-canonical function in the melanoma cells. Pharmacological inhibition of Akt1, an Akt isozyme, in cells depleted of α3β1 or α5β1 restored their invasive activity, while inhibition of the Akt 2 isoform did not cause a visible effect. Similar to our previous results with the α2β1 integrin, this finding suggested that in signaling pathways initiated by α3β1 and α5β1, the Akt1 isoform performs a non-canonical function in regulating invasive phenotype of melanoma cells. In contrast, when the effects of Akt inhibitors on anoikis of the melanoma cells were compared, the Akt2 isoform demonstrated a non-canonical activity in which Akt2 suppression led to a significant attenuation of apoptosis in cells with downregulated α3β1 or α5β1. Our results were the first evidence that, in the same tumor cells, different integrins can control various manifestations of tumor progression through distinct signaling pathways that are both common to various integrins and specific to a particular receptor.
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Affiliation(s)
| | | | - Nina M. Gevorkian
- VN Orekhovich Institute of Biomedical Chemistry, Moscow 119121, Russia
| | - Albert E. Berman
- VN Orekhovich Institute of Biomedical Chemistry, Moscow 119121, Russia
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4
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Pierce CJ, Simmons JL, Broit N, Karunarathne D, Ng MF, Boyle GM. BRN2 expression increases anoikis resistance in melanoma. Oncogenesis 2020; 9:64. [PMID: 32632141 PMCID: PMC7338542 DOI: 10.1038/s41389-020-00247-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/11/2020] [Accepted: 06/16/2020] [Indexed: 11/08/2022] Open
Abstract
Melanoma tumors are highly heterogeneous, comprising of many cell populations that vary in their potential for growth and invasion. Differential transcription factor expression contributes to these phenotypic traits. BRN2, a member of the POU domain family of transcription factors is thought to play important roles in melanoma invasion and metastasis. However, the function of BRN2 during the metastatic process of melanoma remains largely unknown. We therefore investigated the effect of BRN2 expression in melanoma cells with no or low constitutive expression using a doxycycline-inducible system. Induction of BRN2 expression led to reduced proliferation and partial resistance to an inhibitor of mutated BRAF. Whole-genome profiling analysis revealed novel targets and signaling pathway changes related to prevention of cell death induced by detachment from the extracellular matrix, known as anoikis resistance. Further investigation confirmed increased survival of BRN2-expressing cell lines in non-adherent conditions. Functionally, expression of BRN2 promoted induction of c-MET levels as well as increased phosphorylation of STAT3. Treatment with crizotinib, a c-MET inhibitor, decreased cellular viability of BRN2-expressing cells under non-adherent conditions to death by anoikis. Alternative inhibitors of c-MET showed similar results. These results highlight the importance of a largely overlooked transcription factor in the progression and metastasis of melanoma, and may suggest a strategy to target BRN2-expressing cells resistant to therapy and cell death by anoikis.
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Affiliation(s)
- Carly J Pierce
- Cancer Drug Mechanisms Group, Cell and Molecular Biology Department, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Jacinta L Simmons
- Cancer Drug Mechanisms Group, Cell and Molecular Biology Department, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Natasa Broit
- Cancer Drug Mechanisms Group, Cell and Molecular Biology Department, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Deshapriya Karunarathne
- Molecular Immunology Group, Immunology Department, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Mei Fong Ng
- Cancer Drug Mechanisms Group, Cell and Molecular Biology Department, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
| | - Glen M Boyle
- Cancer Drug Mechanisms Group, Cell and Molecular Biology Department, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia.
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia.
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5
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Toth RK, Tran JD, Muldong MT, Nollet EA, Schulz VV, Jensen CC, Hazlehurst LA, Corey E, Durden D, Jamieson C, Miranti CK, Warfel NA. Hypoxia-induced PIM kinase and laminin-activated integrin α6 mediate resistance to PI3K inhibitors in bone-metastatic CRPC. AMERICAN JOURNAL OF CLINICAL AND EXPERIMENTAL UROLOGY 2019; 7:297-312. [PMID: 31511835 PMCID: PMC6734039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 07/02/2019] [Indexed: 06/10/2023]
Abstract
Bone-metastatic castration-resistant prostate cancer (CRPC) is lethal due to inherent resistance to androgen deprivation therapy, chemotherapy, and targeted therapies. Despite the fact that a majority of CRPC patients (approximately 70%) harbor a constitutively active PI3K survival pathway, targeting the PI3K/mTOR pathway has failed to increase overall survival in clinical trials. Here, we identified two separate and independent survival pathways induced by the bone tumor microenvironment that are hyperactivated in CRPC and confer resistance to PI3K inhibitors. The first pathway involves integrin α6β1-mediated adhesion to laminin and the second involves hypoxia-induced expression of PIM kinases. In vitro and in vivo models demonstrate that these pathways transduce parallel but independent signals that promote survival by reducing oxidative stress and preventing cell death. We further demonstrate that both pathways drive resistance to PI3K inhibitors in PTEN-negative tumors. These results provide preclinical evidence that combined inhibition of integrin α6β1 and PIM kinase in CRPC is required to overcome tumor microenvironment-mediated resistance to PI3K inhibitors in PTEN-negative tumors within the hypoxic and laminin-rich bone microenvironment.
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Affiliation(s)
- Rachel K Toth
- Department of Cellular and Molecular Medicine, Prostate Cancer Group, University of Arizona Cancer CenterTucson, AZ, USA
| | - Jack D Tran
- Department of Cellular and Molecular Medicine, Prostate Cancer Group, University of Arizona Cancer CenterTucson, AZ, USA
| | - Michelle T Muldong
- Department of Urology, Moores Cancer Center, University of California San DiegoLa Jolla, CA, USA
| | - Eric A Nollet
- Van Andel Research Institute, Cancer Biology ProgramGrand Rapids, MI, USA
| | - Veronique V Schulz
- Van Andel Research Institute, Cancer Biology ProgramGrand Rapids, MI, USA
| | - Corbin C Jensen
- Department of Cellular and Molecular Medicine, Prostate Cancer Group, University of Arizona Cancer CenterTucson, AZ, USA
| | - Lori A Hazlehurst
- Department of Pharmaceutical Sciences, West Virginia University Cancer InstituteMorgantown, WV, USA
| | - Eva Corey
- Department of Urology, University of WashingtonSeattle, WA, USA
| | - Donald Durden
- Department of Pediatrics, Moores Cancer Center, University of California San DiegoCA, USA
| | - Christina Jamieson
- Department of Urology, Moores Cancer Center, University of California San DiegoLa Jolla, CA, USA
| | - Cindy K Miranti
- Department of Cellular and Molecular Medicine, Prostate Cancer Group, University of Arizona Cancer CenterTucson, AZ, USA
- Van Andel Research Institute, Cancer Biology ProgramGrand Rapids, MI, USA
| | - Noel A Warfel
- Department of Cellular and Molecular Medicine, Prostate Cancer Group, University of Arizona Cancer CenterTucson, AZ, USA
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Shen T, Cheng X, Xia C, Li Q, Gao Y, Pan D, Zhang X, Zhang C, Li Y. Erlotinib inhibits colon cancer metastasis through inactivation of TrkB-dependent ERK signaling pathway. J Cell Biochem 2019; 120:11248-11255. [PMID: 30719765 DOI: 10.1002/jcb.28400] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 12/24/2018] [Accepted: 01/10/2019] [Indexed: 01/24/2023]
Abstract
The distal metastasis is the main cause of death in patients with colon cancer. Tyrosine receptor kinase B (TrkB) and ERK signals may be the potential targets for the treatment of colon cancer metastasis. This study aims to investigate whether erlotinib inhibits distant metastasis of colon cancer by regulating TrkB and ERK signaling pathway. Human colon adenocarcinoma cell lines (SW480 and Caco-2) pretreated with exogenous C-X-C motif chemokine ligand 8 (CXCL8) were used to assess the suppressive effect of erlotinib on tumor metastasis, including anoikis, epithelial-mesenchymal transformation (EMT), migration, and invasion. Through TrkB overexpression, Akt suppression, and ERK suppression, the roles of TrkB, Akt, and ERK in erlotinib-induced metastasis inhibition of colon cancer cells were explored. The results showed that erlotinib alleviated CXCL8-induced metastasis of the colon cancer cells. Overexpression of TrkB in colon cancer cells eliminated the effect of erlotinib on anoikis, inhibition of EMT, migration, and invasion, and downregulation of p-ERK and p-Akt. Furthermore, the inhibition of ERK activation instead of Akt activation was found to participate in erlotinib-mediated metastasis resistance, including anoikis, inhibition of EMT, migration, and invasion. In conclusion, erlotinib inhibits colon cancer cell anoikis resistance, EMT, migration, and invasion by inactivating TrkB-dependent ERK signaling pathway.
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Affiliation(s)
- Tao Shen
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Xianshuo Cheng
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Cuifeng Xia
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Qiang Li
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Yi Gao
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Dingguo Pan
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Xuan Zhang
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Ce Zhang
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Yunfeng Li
- Department of Colorectal Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
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7
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Su Z, Han Y, Sun Q, Wang X, Xu T, Xie W, Huang X. Anti-MET VHH Pool Overcomes MET-Targeted Cancer Therapeutic Resistance. Mol Cancer Ther 2018; 18:100-111. [PMID: 30361332 DOI: 10.1158/1535-7163.mct-18-0351] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 08/30/2018] [Accepted: 10/22/2018] [Indexed: 11/16/2022]
Abstract
Receptor tyrosine kinase MET and its ligand hepatocyte growth factor (HGF) play crucial roles in many human malignancies. Numerous drugs have been developed against kinase center of MET or HGF-mediated activation; however, the outcomes in patients are not so promising. Increasing evidence show that MET has kinase-independent effects on tumorigenesis and dissemination, which explains the low efficacy in kinase inhibition-based strategy. VHH is the recombinant variable region of Camelid heavy-chain antibody. As a nanoscale antigen-binding unit, VHH has become an appealing drug candidate in cancer therapy. In our study, we choose a novel strategy to construct an anti-MET VHH pool against the whole ecto-domain of MET. Comparing to monoclonal antibody or single VHH, the anti-MET VHH pool strongly promotes MET degradation through Clathrin-dependent endo-lysosomal pathway. Thus, the anti-MET VHH pool not only blocks kinase activity of MET, but also reduces protein level of MET. As a consequence, anti-MET VHH pool dramatically suppresses cancer cell proliferation, viability, and colony formation in vitro, and inhibits tumorigenesis and growth in mice. Taken together, VHH pool-based strategy greatly improves MET-targeted therapeutic effects on cancer.
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Affiliation(s)
- Zhipeng Su
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Yunchun Han
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Qichen Sun
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Xiaoxiao Wang
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Ting Xu
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Wei Xie
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China.
| | - Xing Huang
- The Therapeutic Antibody Research Center of SEU-Alphamab, Institute of Life Sciences, Southeast University, Nanjing, China. .,Key Laboratory of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Tumor of Zhejiang Province, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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8
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Li W, Wang Y, Tan S, Rao Q, Zhu T, Huang G, Li Z, Liu G. Overexpression of Epidermal Growth Factor Receptor (EGFR) and HER-2 in Bladder Carcinoma and Its Association with Patients' Clinical Features. Med Sci Monit 2018; 24:7178-7185. [PMID: 30296252 PMCID: PMC6190725 DOI: 10.12659/msm.911640] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The aim of this study was to determine the expression of EGFR/HER-2 and investigate their association with patients' clinical features in bladder transitional cell carcinoma (BTCC). MATERIAL AND METHODS Immunohistochemistry was utilized in our study to explore the expression of EGFR/HER-2 of 56 human bladder cancer samples and 10 normal bladder samples. RESULTS EGFR and HER-2 expressions were both significantly higher in bladder transitional cell carcinoma (BTCC) than that in non-cancer bladder samples; the EGFR positivity rate was 55.4% among BTCC samples and 37.5% for HER-2a. A statistically significant correlation was also present between the increasing EGFR or HER-2 expression levels and the clinical stages, pathologic grades, and tumor recurrence. The expression level of EGFR increased along with higher clinical stages and pathologic grades of BTCC, and the obviously increased expression of HER-2 was statistically associated with clinical stages and tumor recurrence. In addition, the expression level of HER-2 increased along with the higher clinical stage of BTCC. EGFR expression and HER-2 levels were positively associated in BTCC samples. CONCLUSIONS Our findings demonstrate that high EGFR and HER-2 expressions are dramatically increased in the BTCC tissues and are closely related to the clinical stages, pathologic grades, and tumor recurrence. Therefore, the evaluation of EGFR and HER-2 expression in BTCC may contribute to identifying patients who are at increased risk of disease progression and recurrence.
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Affiliation(s)
- Wei Li
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
| | - Youquan Wang
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
| | - Shubo Tan
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
| | - Qishuo Rao
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
| | - Tian Zhu
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
| | - Guo Huang
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
| | - Zhuo Li
- Department of Urology, Hunan Provincial People's Hospital, Changsha, Hunan, China (mainland)
| | - Guowen Liu
- Department of Surgery, The Second Hospital, University of South China, Hengyang, Hunan, China (mainland)
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HDAC Inhibition Counteracts Metastatic Re-Activation of Prostate Cancer Cells Induced by Chronic mTOR Suppression. Cells 2018; 7:cells7090129. [PMID: 30200497 PMCID: PMC6162415 DOI: 10.3390/cells7090129] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/28/2018] [Accepted: 08/30/2018] [Indexed: 12/11/2022] Open
Abstract
This study was designed to investigate whether epigenetic modulation by histone deacetylase (HDAC) inhibition might circumvent resistance towards the mechanistic target of rapamycin (mTOR) inhibitor temsirolimus in a prostate cancer cell model. Parental (par) and temsirolimus-resistant (res) PC3 prostate cancer cells were exposed to the HDAC inhibitor valproic acid (VPA), and tumor cell adhesion, chemotaxis, migration, and invasion were evaluated. Temsirolimus resistance was characterized by reduced binding of PC3res cells to endothelium, immobilized collagen, and fibronectin, but increased adhesion to laminin, as compared to the parental cells. Chemotaxis, migration, and invasion of PC3res cells were enhanced following temsirolimus re-treatment. Integrin α and β receptors were significantly altered in PC3res compared to PC3par cells. VPA significantly counteracted temsirolimus resistance by down-regulating tumor cell–matrix interaction, chemotaxis, and migration. Evaluation of integrin expression in the presence of VPA revealed a significant down-regulation of integrin α5 in PC3res cells. Blocking studies demonstrated a close association between α5 expression on PC3res and chemotaxis. In this in vitro model, temsirolimus resistance drove prostate cancer cells to become highly motile, while HDAC inhibition reversed the metastatic activity. The VPA-induced inhibition of metastatic activity was accompanied by a lowered integrin α5 surface level on the tumor cells.
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10
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Discordant inheritance of chromosomal and extrachromosomal DNA elements contributes to dynamic disease evolution in glioblastoma. Nat Genet 2018; 50:708-717. [PMID: 29686388 PMCID: PMC5934307 DOI: 10.1038/s41588-018-0105-0] [Citation(s) in RCA: 169] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 02/28/2018] [Indexed: 01/09/2023]
Abstract
To understand how genomic heterogeneity of glioblastoma contributes to the poor response to therapy characteristic of this disease, we performed DNA and RNA sequencing on GBM tumor samples and the neurospheres and orthotopic xenograft models derived from them. We used the resulting data set to show that somatic driver alterations including single nucleotide variants, focal DNA alterations, and oncogene amplification on extrachromosomal DNA (ecDNA) elements were in majority propagated from tumor to model systems. In several instances, ecDNAs and chromosomal alterations demonstrated divergent inheritance patterns and clonal selection dynamics during cell culture and xenografting. We infer that ecDNA inherited unevenly between offspring cells, a characteristic that affects the oncogenic potential of cells with more or fewer ecDNAs. Longitudinal patient tumor profiling found that oncogenic ecDNAs are frequently retained throughout the course of disease. Our analysis shows that extrachromosomal elements allow rapid increase of genomic heterogeneity during glioblastoma evolution, independent of chromosomal DNA alterations.
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11
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Koshizuka K, Kikkawa N, Hanazawa T, Yamada Y, Okato A, Arai T, Katada K, Okamoto Y, Seki N. Inhibition of integrin β1-mediated oncogenic signalling by the antitumor microRNA-29 family in head and neck squamous cell carcinoma. Oncotarget 2017; 9:3663-3676. [PMID: 29423074 PMCID: PMC5790491 DOI: 10.18632/oncotarget.23194] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 12/01/2017] [Indexed: 12/28/2022] Open
Abstract
Due to their aggressive behavior, local recurrence and distant metastasis, survival rate of advanced stage of the patients with head and neck squamous cell carcinoma (HNSCC) is very poor. Currently available epidermal growth factor receptor (EGFR)-targeted therapies are not considered curative for HNSCC. Therefore, novel approaches for identification of therapeutic targets in HNSCC are needed. All members of the miRNA-29 family (miR-29a, miR-29b, and miR-29c) were downregulated in HNSCC tissues by analysis of RNA-sequencing based microRNA (miRNA) expression signature. Ectopic expression of mature miRNAs demonstrated that the miR-29 family inhibited cancer cell migration and invasion by HNSCC cell lines. Comprehensive gene expression studies and in silico database analyses were revealed that integrin β1 (ITGB1) was regulated by the miR-29 family in HNSCC cells. Overexpression of ITGB1 was confirmed in HNSCC specimens, and high expression of ITGB1 significantly predicted poor survival in patients with HNSCC (p = 0.00463). Knockdown of ITGB1 significantly inhibited cancer cell migration and invasion through regulating downstream of ITGB1-mediated oncogenic signalling. In conclusion, regulation of the antitumor miR-29 family affected integrin-mediated oncogenic signalling to modulate HNSCC pathogenesis; these molecules may be novel therapeutic targets for HNSCC.
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Affiliation(s)
- Keiichi Koshizuka
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan.,Department of Otorhinolaryngology/Head and Neck Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Naoko Kikkawa
- Department of Otorhinolaryngology/Head and Neck Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Toyoyuki Hanazawa
- Department of Otorhinolaryngology/Head and Neck Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yasutaka Yamada
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan
| | - Atsushi Okato
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan
| | - Takayuki Arai
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan
| | - Koji Katada
- Department of Otorhinolaryngology/Head and Neck Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yoshitaka Okamoto
- Department of Otorhinolaryngology/Head and Neck Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Naohiko Seki
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan
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