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Ramesh S, Cifci A, Javeri S, Minne RL, Longhurst CA, Nickel KP, Kimple RJ, Baschnagel AM. MET Inhibitor Capmatinib Radiosensitizes MET Exon 14-Mutated and MET-Amplified Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2024; 118:1379-1390. [PMID: 37979706 DOI: 10.1016/j.ijrobp.2023.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 10/30/2023] [Accepted: 11/05/2023] [Indexed: 11/20/2023]
Abstract
PURPOSE The objective of this study was to investigate the effects of inhibiting the MET receptor with capmatinib, a potent and clinically relevant ATP-competitive tyrosine kinase inhibitor, in combination with radiation in MET exon 14-mutated and MET-amplified non-small cell lung (NSCLC) cancer models. METHODS AND MATERIALS In vitro effects of capmatinib and radiation on cell proliferation, colony formation, MET signaling, apoptosis, and DNA damage repair were evaluated. In vivo tumor responses were assessed in cell line xenograft and patient-derived xenograft models. Immunohistochemistry was used to confirm the in vitro results. RESULTS In vitro clonogenic survival assays demonstrated radiosensitization with capmatinib in both MET exon 14-mutated and MET-amplified NSCLC cell lines. No radiation-enhancing effect was observed in MET wild-type NSCLC and a human bronchial epithelial cell line. Minimal apoptosis was detected with the combination of capmatinib and radiation. Capmatinib plus radiation compared with radiation alone resulted in inhibition of DNA double-strand break repair, as measured by prolonged expression of γH2AX. In vivo, the combination of capmatinib and radiation significantly delayed tumor growth compared with vehicle control, capmatinib alone, or radiation alone. Immunohistochemistry indicated inhibition of phospho-MET and phospho-S6 and a decrease in Ki67 with inhibition of MET. CONCLUSIONS Inhibition of MET with capmatinib enhances the effect of radiation in both MET exon 14-mutated and MET-amplified NSCLC models.
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Affiliation(s)
- Shrey Ramesh
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Ahmet Cifci
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Saahil Javeri
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Rachel L Minne
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Colin A Longhurst
- Department of Biostatistics and Medical Informatics, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Kwangok P Nickel
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Randall J Kimple
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin; University of Wisconsin Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin.
| | - Andrew M Baschnagel
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin; University of Wisconsin Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin.
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Ramesh S, Cifci A, Javeri S, Minne R, Longhurst CA, Nickel KP, Kimple RJ, Baschnagel AM. MET Inhibitor Capmatinib Radiosensitizes MET Exon 14-Mutated and MET-Amplified Non-Small Cell Lung Cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.26.564232. [PMID: 37961176 PMCID: PMC10634863 DOI: 10.1101/2023.10.26.564232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Purpose The objective of this study was to investigate the effects of inhibiting the MET receptor with capmatinib, a potent and clinically relevant ATP-competitive tyrosine kinase inhibitor, in combination with radiation in MET exon 14-mutated and MET-amplified non-small cell lung (NSCLC) cancer models. Methods and Materials In vitro effects of capmatinib and radiation on cell proliferation, colony formation, MET signaling, apoptosis, and DNA damage repair were evaluated. In vivo tumor responses were assessed in cell line xenograft and patient-derived xenograft models. Immunohistochemistry (IHC) was used to confirm in vitro results. Results In vitro clonogenic survival assays demonstrated radiosensitization with capmatinib in both MET exon 14-mutated and MET-amplified NSCLC cell lines. No radiation-enhancing effect was observed in MET wild-type NSCLC and human bronchial epithelial cell line. Minimal apoptosis was detected with the combination of capmatinib and radiation. Capmatinib plus radiation compared to radiation alone resulted in inhibition of DNA double-strand break repair as measured by prolonged expression of γH2AX. In vivo, the combination of capmatinib and radiation significantly delayed tumor growth compared to vehicle control, capmatinib alone, or radiation alone. IHC indicated inhibition of phospho-MET and phospho-S6 and a decrease in Ki67 with inhibition of MET. Conclusions Inhibition of MET with capmatinib enhanced the effect of radiation in both MET exon 14-mutated and MET-amplified NSCLC models.
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Affiliation(s)
- Shrey Ramesh
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Ahmet Cifci
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Saahil Javeri
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Rachel Minne
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Colin A. Longhurst
- Department of Biostatistics and Medical Informatics, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Kwangok P. Nickel
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Randall J. Kimple
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
- University of Wisconsin Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Andrew M. Baschnagel
- Department of Human Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
- University of Wisconsin Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
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Rilotumumab Resistance Acquired by Intracrine Hepatocyte Growth Factor Signaling. Cancers (Basel) 2023; 15:cancers15020460. [PMID: 36672409 PMCID: PMC9857108 DOI: 10.3390/cancers15020460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
Drug resistance is a long-standing impediment to effective systemic cancer therapy and acquired drug resistance is a growing problem for molecularly-targeted therapeutics that otherwise have shown unprecedented successes in disease control. The hepatocyte growth factor (HGF)/Met receptor pathway signaling is frequently involved in cancer and has been a subject of targeted drug development for nearly 30 years. To anticipate and study specific resistance mechanisms associated with targeting this pathway, we engineered resistance to the HGF-neutralizing antibody rilotumumab in glioblastoma cells harboring autocrine HGF/Met signaling, a frequent abnormality of this brain cancer in humans. We found that rilotumumab resistance was acquired through an unusual mechanism comprising dramatic HGF overproduction and misfolding, endoplasmic reticulum (ER) stress-response signaling and redirected vesicular trafficking that effectively sequestered rilotumumab and misfolded HGF from native HGF and activated Met. Amplification of MET and HGF genes, with evidence of rapidly acquired intron-less, reverse-transcribed copies in DNA, was also observed. These changes enabled persistent Met pathway activation and improved cell survival under stress conditions. Point mutations in the HGF pathway or other complementary or downstream growth regulatory cascades that are frequently associated with targeted drug resistance in other prevalent cancer types were not observed. Although resistant cells were significantly more malignant, they retained sensitivity to Met kinase inhibition and acquired sensitivity to inhibition of ER stress signaling and cholesterol biosynthesis. Defining this mechanism reveals details of a rapidly acquired yet highly-orchestrated multisystem route of resistance to a selective molecularly-targeted agent and suggests strategies for early detection and effective intervention.
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Maksoud S. The DNA Double-Strand Break Repair in Glioma: Molecular Players and Therapeutic Strategies. Mol Neurobiol 2022; 59:5326-5365. [PMID: 35696013 DOI: 10.1007/s12035-022-02915-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 06/05/2022] [Indexed: 12/12/2022]
Abstract
Gliomas are the most frequent type of tumor in the central nervous system, which exhibit properties that make their treatment difficult, such as cellular infiltration, heterogeneity, and the presence of stem-like cells responsible for tumor recurrence. The response of this type of tumor to chemoradiotherapy is poor, possibly due to a higher repair activity of the genetic material, among other causes. The DNA double-strand breaks are an important type of lesion to the genetic material, which have the potential to trigger processes of cell death or cause gene aberrations that could promote tumorigenesis. This review describes how the different cellular elements regulate the formation of DNA double-strand breaks and their repair in gliomas, discussing the therapeutic potential of the induction of this type of lesion and the suppression of its repair as a control mechanism of brain tumorigenesis.
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Affiliation(s)
- Semer Maksoud
- Experimental Therapeutics and Molecular Imaging Unit, Department of Neurology, Neuro-Oncology Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA.
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New Immunotherapeutic Approaches for Glioblastoma. J Immunol Res 2021; 2021:3412906. [PMID: 34557553 PMCID: PMC8455182 DOI: 10.1155/2021/3412906] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/24/2021] [Indexed: 12/27/2022] Open
Abstract
Glioblastoma (GBM) is the most common primary malignant brain tumor with a high mortality rate. The current treatment consists of surgical resection, radiation, and chemotherapy; however, the median survival rate is only 12–18 months despite these alternatives, highlighting the urgent need to find new strategies. The heterogeneity of GBM makes this tumor difficult to treat, and the immunotherapies result in an attractive approach to modulate the antitumoral immune responses favoring the tumor eradication. The immunotherapies for GMB including monoclonal antibodies, checkpoint inhibitors, vaccines, and oncolytic viruses, among others, have shown favorable results alone or as a multimodal treatment. In this review, we summarize and discuss promising immunotherapies for GBM currently under preclinical investigation as well as in clinical trials.
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Jabbour SK, Williams TM, Sayan M, Miller ED, Ajani JA, Chang AC, Coleman N, El-Rifai W, Haddock M, Ilson D, Jamorabo D, Kunos C, Lin S, Liu G, Prasanna PG, Rustgi AK, Wong R, Vikram B, Ahmed MM. Potential Molecular Targets in the Setting of Chemoradiation for Esophageal Malignancies. J Natl Cancer Inst 2021; 113:665-679. [PMID: 33351071 PMCID: PMC8600025 DOI: 10.1093/jnci/djaa195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/03/2020] [Accepted: 11/30/2020] [Indexed: 11/14/2022] Open
Abstract
Although the development of effective combined chemoradiation regimens for esophageal cancers has resulted in statistically significant survival benefits, the majority of patients treated with curative intent develop locoregional and/or distant relapse. Further improvements in disease control and survival will require the development of individualized therapy based on the knowledge of host and tumor genomics and potentially harnessing the host immune system. Although there are a number of gene targets that are amplified and proteins that are overexpressed in esophageal cancers, attempts to target several of these have not proven successful in unselected patients. Herein, we review our current state of knowledge regarding the molecular pathways implicated in esophageal carcinoma, and the available agents for targeting these pathways that may rationally be combined with standard chemoradiation, with the hope that this commentary will guide future efforts of novel combinations of therapy.
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Affiliation(s)
- Salma K Jabbour
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ, USA
| | - Terence M Williams
- Department of Radiation Oncology, The Ohio State University, Columbus, OH, USA
- Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA, USA
| | - Mutlay Sayan
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ, USA
| | - Eric D Miller
- Department of Radiation Oncology, The Ohio State University, Columbus, OH, USA
| | - Jaffer A Ajani
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Andrew C Chang
- Department of Surgery, University of Michigan, Ann Arbor, MI, USA
- Department of Surgery, Section of Thoracic Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Norman Coleman
- National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Wael El-Rifai
- Department of Surgery, Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL, USA
- Department of Veterans Affairs, Miami Healthcare System, Miami, FL, USA
| | - Michael Haddock
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN, USA
| | - David Ilson
- Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | | | - Charles Kunos
- Investigational Drug Branch, Cancer Therapy Evaluation Program, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Steven Lin
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Geoffrey Liu
- Division of Medical Oncology, Princess Margaret Cancer Centre, Toronto, Canada
| | - Pataje G Prasanna
- Radiation Research Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Anil K Rustgi
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA
| | - Rosemary Wong
- Radiation Research Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Bhadrasain Vikram
- Radiation Research Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Mansoor M Ahmed
- Radiation Research Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
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Gong L, Zhang Y, Liu C, Zhang M, Han S. Application of Radiosensitizers in Cancer Radiotherapy. Int J Nanomedicine 2021; 16:1083-1102. [PMID: 33603370 PMCID: PMC7886779 DOI: 10.2147/ijn.s290438] [Citation(s) in RCA: 143] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/19/2021] [Indexed: 12/11/2022] Open
Abstract
Radiotherapy (RT) is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors. Although great success has been achieved on radiotherapy, there is still an intractable challenge to enhance radiation damage to tumor tissue and reduce side effects to healthy tissue. Radiosensitizers are chemicals or pharmaceutical agents that can enhance the killing effect on tumor cells by accelerating DNA damage and producing free radicals indirectly. In most cases, radiosensitizers have less effect on normal tissues. In recent years, several strategies have been exploited to develop radiosensitizers that are highly effective and have low toxicity. In this review, we first summarized the applications of radiosensitizers including small molecules, macromolecules, and nanomaterials, especially those that have been used in clinical trials. Second, the development states of radiosensitizers and the possible mechanisms to improve radiosensitizers sensibility are reviewed. Third, the challenges and prospects for clinical translation of radiosensitizers in oncotherapy are presented.
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Affiliation(s)
- Liuyun Gong
- Department of Oncology, The First Affiliated Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi, 710061, People’s Republic of China
| | - Yujie Zhang
- School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, 710061, People’s Republic of China
- Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, 710061, People’s Republic of China
| | - Chengcheng Liu
- School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, 710061, People’s Republic of China
| | - Mingzhen Zhang
- School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, 710061, People’s Republic of China
- Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, 710061, People’s Republic of China
| | - Suxia Han
- Department of Oncology, The First Affiliated Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi, 710061, People’s Republic of China
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Giotta Lucifero A, Luzzi S, Brambilla I, Schena L, Mosconi M, Foiadelli T, Savasta S. Potential roads for reaching the summit: an overview on target therapies for high-grade gliomas. ACTA BIO-MEDICA : ATENEI PARMENSIS 2020; 91:61-78. [PMID: 32608376 PMCID: PMC7975828 DOI: 10.23750/abm.v91i7-s.9956] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 06/01/2020] [Indexed: 12/14/2022]
Abstract
Background: The tailored targeting of specific oncogenes represents a new frontier in the treatment of high-grade glioma in the pursuit of innovative and personalized approaches. The present study consists in a wide-ranging overview of the target therapies and related translational challenges in neuro-oncology. Methods: A review of the literature on PubMed/MEDLINE on recent advances concerning the target therapies for treatment of central nervous system malignancies was carried out. In the Medical Subject Headings, the terms “Target Therapy”, “Target drug” and “Tailored Therapy” were combined with the terms “High-grade gliomas”, “Malignant brain tumor” and “Glioblastoma”. Articles published in the last five years were further sorted, based on the best match and relevance. The ClinicalTrials.gov website was used as a source of the main trials, where the search terms were “Central Nervous System Tumor”, “Malignant Brain Tumor”, “Brain Cancer”, “Brain Neoplasms” and “High-grade gliomas”. Results: A total of 137 relevant articles and 79 trials were selected. Target therapies entailed inhibitors of tyrosine kinases, PI3K/AKT/mTOR pathway, farnesyl transferase enzymes, p53 and pRB proteins, isocitrate dehydrogenases, histone deacetylases, integrins and proteasome complexes. The clinical trials mostly involved combined approaches. They were phase I, II, I/II and III in 33%, 42%, 16%, and 9% of the cases, respectively. Conclusion: Tyrosine kinase and angiogenesis inhibitors, in combination with standard of care, have shown most evidence of the effectiveness in glioblastoma. Resistance remains an issue. A deeper understanding of the molecular pathways involved in gliomagenesis is the key aspect on which the translational research is focusing, in order to optimize the target therapies of newly diagnosed and recurrent brain gliomas. (www.actabiomedica.it)
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Affiliation(s)
- Alice Giotta Lucifero
- Neurosurgery Unit, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy.
| | - Sabino Luzzi
- Neurosurgery Unit, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy; Neurosurgery Unit, Department of Surgical Sciences, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
| | - Ilaria Brambilla
- Pediatric Clinic, Department of Pediatrics, Fondazione IRCCS Policlinico San Matteo, Uni-versity of Pavia, Pavia, Italy.
| | - Lucia Schena
- Pediatric Clinic, Department of Pediatrics, Fondazione IRCCS Policlinico San Matteo, Uni-versity of Pavia, Pavia, Italy.
| | - Mario Mosconi
- Orthopaedic and Traumatology Unit, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy.
| | - Thomas Foiadelli
- Pediatric Clinic, Department of Pediatrics, Fondazione IRCCS Policlinico San Matteo, Uni-versity of Pavia, Pavia, Italy.
| | - Salvatore Savasta
- Pediatric Clinic, Department of Pediatrics, Fondazione IRCCS Policlinico San Matteo, Uni-versity of Pavia, Pavia, Italy.
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Photophysical properties and in vitro photocytotoxicity of disodium salt 2.4-di(alpha-methoxyethyl)-deuteroporphyrin-IX (Dimegine). Photodiagnosis Photodyn Ther 2019; 25:35-42. [DOI: 10.1016/j.pdpdt.2018.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 10/24/2018] [Accepted: 11/05/2018] [Indexed: 02/05/2023]
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Cuneo KC, Mehta RK, Kurapati H, Thomas DG, Lawrence TS, Nyati MK. Enhancing the Radiation Response in KRAS Mutant Colorectal Cancers Using the c-Met Inhibitor Crizotinib. Transl Oncol 2018; 12:209-216. [PMID: 30412912 PMCID: PMC6226619 DOI: 10.1016/j.tranon.2018.10.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 10/08/2018] [Accepted: 10/11/2018] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION: C-Met plays important roles in treatment resistance, tumor invasion, and metastasis. In this study, we used a small molecule inhibitor of c-Met, crizotinib, in cetuximab-resistant, mutant KRAS-driven colorectal cancer cell lines and assessed radiosensitization. MATERIALS AND METHODS: A tissue microarray containing colorectal tumors was used to study the relationship between KRAS mutations and c-Met expression. For in vivo studies, we used the KRAS mutant cell lines HCT116, DLD1, and LoVo. Colony formation assays were performed to assess the effects of crizotinib and cetuximab. Immunoblot analysis was used to determine the effect of crizotinib on c-Met and downstream pathways and DNA damage response. We then selected noncytotoxic doses of crizotinib to assess clonogenic survival with radiation. To study potential mechanisms of radiosensitization, cell cycle analysis was performed using flow cytometry. RESULTS: Analysis of the tissue microarray revealed that KRAS mutant tumors had active c-Met signaling. KRAS mutant cell lines LoVo, HCT116, and DLD1 were resistant to cetuximab but sensitive to crizotinib. Pretreatment with crizotinib for 24 hours radiosensitized LoVo, DLD1, and HCT116 cell lines with enhancement ratios of 1.54, 1.23, and 1.30, respectively. Immunoblot analysis showed that crizotinib blocked radiation-induced c-Met phosphorylation and attenuated downstream signaling pathways. Cell cycle analysis revealed minimal G1 arrest with crizotinib. Additionally, crizotinib completely blocked HGF induced cell migration. CONCLUSIONS: Inhibition of c-Met with crizotinib effectively sensitizes cetuximab-resistant KRAS mutant colorectal cancer cell lines to radiation. Crizotinib has the potential to improve outcomes in locally advanced rectal cancer patients undergoing chemoradiation.
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Affiliation(s)
- Kyle C Cuneo
- University of Michigan Medical School, Department of Radiation Oncology, Ann Arbor, MI, USA.
| | - Ranjit K Mehta
- University of Michigan Medical School, Department of Radiation Oncology, Ann Arbor, MI, USA
| | - Himabindu Kurapati
- University of Michigan Medical School, Department of Radiation Oncology, Ann Arbor, MI, USA
| | - Dafydd G Thomas
- University of Michigan Medical School, Department of Pathology, Ann Arbor, MI, USA
| | - Theodore S Lawrence
- University of Michigan Medical School, Department of Radiation Oncology, Ann Arbor, MI, USA
| | - Mukesh K Nyati
- University of Michigan Medical School, Department of Radiation Oncology, Ann Arbor, MI, USA
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Zeng J, Zhang H, Tan Y, Sun C, Liang Y, Yu J, Zou H. Aggregation of lipid rafts activates c-met and c-Src in non-small cell lung cancer cells. BMC Cancer 2018; 18:611. [PMID: 29848294 PMCID: PMC5977465 DOI: 10.1186/s12885-018-4501-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 05/11/2018] [Indexed: 11/30/2022] Open
Abstract
Background Activation of c-Met, a receptor tyrosine kinase, induces radiation therapy resistance in non-small cell lung cancer (NSCLC). The activated residual of c-Met is located in lipid rafts (Duhon et al. Mol Carcinog 49:739-49, 2010). Therefore, we hypothesized that disturbing the integrity of lipid rafts would restrain the activation of the c-Met protein and reverse radiation resistance in NSCLC. In this study, a series of experiments was performed to test this hypothesis. Methods NSCLC A549 and H1993 cells were incubated with methyl-β-cyclodextrin (MβCD), a lipid raft inhibitor, at different concentrations for 1 h before the cells were X-ray irradiated. The following methods were used: clonogenic (colony-forming) survival assays, flow cytometry (for cell cycle and apoptosis analyses), immunofluorescence microscopy (to show the distribution of proteins in lipid rafts), Western blotting, and biochemical lipid raft isolation (purifying lipid rafts to show the distribution of proteins in lipid rafts). Results Our results showed that X-ray irradiation induced the aggregation of lipid rafts in A549 cells, activated c-Met and c-Src, and induced c-Met and c-Src clustering to lipid rafts. More importantly, MβCD suppressed the proliferation of A549 and H1993 cells, and the combination of MβCD and radiation resulted in additive increases in A549 and H1993 cell apoptosis. Destroying the integrity of lipid rafts inhibited the aggregation of c-Met and c-Src to lipid rafts and reduced the expression of phosphorylated c-Met and phosphorylated c-Src in lipid rafts. Conclusions X-ray irradiation induced the aggregation of lipid rafts and the clustering of c-Met and c-Src to lipid rafts through both lipid raft-dependent and lipid raft-independent mechanisms. The lipid raft-dependent activation of c-Met and its downstream pathways played an important role in the development of radiation resistance in NSCLC cells mediated by c-Met. Further studies are still required to explore the molecular mechanisms of the activation of c-Met and c-Src in lipid rafts induced by radiation. Electronic supplementary material The online version of this article (10.1186/s12885-018-4501-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Juan Zeng
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China
| | - Heying Zhang
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China
| | - Yonggang Tan
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China
| | - Cheng Sun
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China
| | - Yusi Liang
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China
| | - Jinyang Yu
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China
| | - Huawei Zou
- The First Oncology Department, Shengjing Hospital affiliated with China Medical University, Shenyang, 110004, China.
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Role and Therapeutic Targeting of the HGF/MET Pathway in Glioblastoma. Cancers (Basel) 2017; 9:cancers9070087. [PMID: 28696366 PMCID: PMC5532623 DOI: 10.3390/cancers9070087] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 06/29/2017] [Accepted: 07/06/2017] [Indexed: 01/08/2023] Open
Abstract
Glioblastoma (GBM) is a lethal brain tumor with dismal prognosis. Current therapeutic options, consisting of surgery, chemotherapy and radiation, have only served to marginally increase patient survival. Receptor tyrosine kinases (RTKs) are dysregulated in approximately 90% of GBM; attributed to this, research has focused on inhibiting RTKs as a novel and effective therapy for GBM. Overexpression of RTK mesenchymal epithelial transition (MET), and its ligand, hepatocyte growth factor (HGF), in GBM highlights a promising new therapeutic target. This review will discuss the role of MET in cell cycle regulation, cell proliferation, evasion of apoptosis, cell migration and invasion, angiogenesis and therapeutic resistance in GBM. It will also discuss the modes of deregulation of HGF/MET and their regulation by microRNAs. As the HGF/MET pathway is a vital regulator of multiple pro-survival pathways, efforts and strategies for its exploitation for GBM therapy are also described.
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Clémenson C, Chargari C, Liu W, Mondini M, Ferté C, Burbridge MF, Cattan V, Jacquet-Bescond A, Deutsch E. The MET/AXL/FGFR Inhibitor S49076 Impairs Aurora B Activity and Improves the Antitumor Efficacy of Radiotherapy. Mol Cancer Ther 2017; 16:2107-2119. [PMID: 28619752 DOI: 10.1158/1535-7163.mct-17-0112] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 04/21/2017] [Accepted: 06/05/2017] [Indexed: 11/16/2022]
Abstract
Several therapeutic agents targeting HGF/MET signaling are under clinical development as single agents or in combination, notably with anti-EGFR therapies in non-small cell lung cancer (NSCLC). However, despite increasing data supporting a link between MET, irradiation, and cancer progression, no data regarding the combination of MET-targeting agents and radiotherapy are available from the clinic. S49076 is an oral ATP-competitive inhibitor of MET, AXL, and FGFR1-3 receptors that is currently in phase I/II clinical trials in combination with gefitinib in NSCLC patients whose tumors show resistance to EGFR inhibitors. Here, we studied the impact of S49076 on MET signaling, cell proliferation, and clonogenic survival in MET-dependent (GTL16 and U87-MG) and MET-independent (H441, H460, and A549) cells. Our data show that S49076 exerts its cytotoxic activity at low doses on MET-dependent cells through MET inhibition, whereas it inhibits growth of MET-independent cells at higher but clinically relevant doses by targeting Aurora B. Furthermore, we found that S49076 improves the antitumor efficacy of radiotherapy in both MET-dependent and MET-independent cell lines in vitro and in subcutaneous and orthotopic tumor models in vivo In conclusion, our study demonstrates that S49076 has dual antitumor activity and can be used in combination with radiotherapy for the treatment of both MET-dependent and MET-independent tumors. These results support the evaluation of combined treatment of S49076 with radiation in clinical trials without patient selection based on the tumor MET dependency status. Mol Cancer Ther; 16(10); 2107-19. ©2017 AACR.
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Affiliation(s)
- Céline Clémenson
- Gustave Roussy, Université Paris-Saclay, UMR Radiothérapie Moléculaire, Villejuif, France.,INSERM, U1030, SIRIC Socrates, DHU TORINO, Villejuif, France
| | - Cyrus Chargari
- Gustave Roussy, Université Paris-Saclay, UMR Radiothérapie Moléculaire, Villejuif, France.,INSERM, U1030, SIRIC Socrates, DHU TORINO, Villejuif, France.,Gustave Roussy, Université Paris-Saclay, Département de Radiothérapie, Villejuif, France.,Institut de Recherche Biomédicale des Armées, Brétigny-Sur-Orge, France
| | - Winchygn Liu
- Gustave Roussy, Université Paris-Saclay, UMR Radiothérapie Moléculaire, Villejuif, France.,INSERM, U1030, SIRIC Socrates, DHU TORINO, Villejuif, France
| | - Michele Mondini
- Gustave Roussy, Université Paris-Saclay, UMR Radiothérapie Moléculaire, Villejuif, France.,INSERM, U1030, SIRIC Socrates, DHU TORINO, Villejuif, France
| | - Charles Ferté
- Gustave Roussy, Université Paris-Saclay, UMR Radiothérapie Moléculaire, Villejuif, France.,INSERM, U1030, SIRIC Socrates, DHU TORINO, Villejuif, France.,INSERM, U981, Villejuif, France
| | - Mike F Burbridge
- Oncology Unit, Institut de Recherches Internationales Servier, Suresnes, France
| | - Valérie Cattan
- Oncology Unit, Institut de Recherches Internationales Servier, Suresnes, France
| | | | - Eric Deutsch
- Gustave Roussy, Université Paris-Saclay, UMR Radiothérapie Moléculaire, Villejuif, France. .,INSERM, U1030, SIRIC Socrates, DHU TORINO, Villejuif, France.,Gustave Roussy, Université Paris-Saclay, Département de Radiothérapie, Villejuif, France.,Univ Paris Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
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14
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Jia Y, Dai G, Wang J, Gao X, Zhao Z, Duan Z, Gu B, Yang W, Wu J, Ju Y, Wang M, Li Z. c-MET inhibition enhances the response of the colorectal cancer cells to irradiation in vitro and in vivo. Oncol Lett 2016; 11:2879-2885. [PMID: 27073569 DOI: 10.3892/ol.2016.4303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 01/05/2016] [Indexed: 12/19/2022] Open
Abstract
The aim of the present study was to investigate the effect of hepatocyte growth factor receptor (c-MET) inhibition on the viability of colon cancer cells and xenografts exposed to irradiation using short hairpin (sh)RNA or the c-MET inhibitor PHA665752. The underlying mechanisms were also investigated. Human colorectal adenocarcinoma HT-29 cells were infected with a lentivirus expressing shRNAs against c-MET and were irradiated at 0, 2, 4, 6 and 8 Gy. The viability of the cells was assessed by alamarBlue® assays. Mice bearing human colon carcinoma SW620 xenografts were randomly selected to receive 2.5% dimethyl sulfoxide (DMSO), 25 mg/kg PHA665752 intraperitoneally once every 2 days for 3 weeks, irradiation at 10 Gy, or 25 mg/kg PHA665752 intraperitoneally once every 2 days for 3 weeks followed 24 h later by irradiation at 10 Gy. The mean tumor volume (MTV) was measured. The apoptotic rate of cells was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assays, and double stranded break marker antibody γ-H2AX and hypoxia inducible factor (HIF)-1α expression was examined by immunohistochemistry. alamarBlue assays revealed that c-MET downregulation by shRNA markedly accentuated the irradiation-induced reduction in the viability of HT-29 cells compared with HT-29 cells irradiated at the same doses (P<0.05). A combination of irradiation and PHA665752 caused an additional reduction in the MTV (382.8±42.4 mm3; P<0.01 vs. irradiation and PHA665752, 998.0±180.6 and 844.8±190.0 mm3, respectively). TUNEL assays revealed that irradiation and PHA665752 alone caused significant apoptosis of the SW620 cells in the tumor xenografts (P<0.01 vs. DMSO). The apoptotic index in the tumor xenografts of mice treated with a combination of irradiation and PHA665752 was significantly increased compared with mice treated with either agent alone (P<0.01). The combination of irradiation and PHA665752 was also associated with a marked increase in γ-H2AX levels and a significant decrease in HIF-1α expression in the xenografts (P<0.01). In conclusion, c-MET inhibition sensitizes colorectal cancer cells to irradiation by enhancing the formation of DNA double strand breaks and possibly alleviating tumor hypoxia.
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Affiliation(s)
- Yitao Jia
- Third Department of Oncology, Hebei General Hospital, Shijiazhuang, Hebei 050011, P.R. China
| | - Guangyao Dai
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China; Department of Surgery, The First Hospital of Shijiazhuang, Shijiazhuang, Hebei 050011, P.R. China
| | - Jinxi Wang
- Fourth Department of General Surgery, The First Hospital of Handan, Handan, Hebei 056002, P.R. China
| | - Xing Gao
- Second Department of Abdominal Surgery, The First Affiliated Hospital of Xingtai Medical College, Xingtai, Hebei 054001, P.R. China
| | - Zhaolong Zhao
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Zhihui Duan
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Bin Gu
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Weiguang Yang
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Jianhua Wu
- Experimental Animal Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Yingchao Ju
- Experimental Animal Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Mingxia Wang
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Zhongxin Li
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
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15
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Garajová I, Giovannetti E, Biasco G, Peters GJ. c-Met as a Target for Personalized Therapy. TRANSLATIONAL ONCOGENOMICS 2015. [PMID: 26628860 DOI: 10.4137/togog.s30534] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
MET and its ligand HGF are involved in many biological processes, both physiological and pathological, making this signaling pathway an attractive therapeutic target in oncology. Downstream signaling effects are transmitted via mitogen-activated protein kinase (MAPK), PI3K (phosphoinositide 3-kinase protein kinase B)/AKT, signal transducer and activator of transcription proteins (STAT), and nuclear factor-κB. The final output of the terminal effector components of these pathways is activation of cytoplasmic and nuclear processes leading to increases in cell proliferation, survival, mobilization and invasive capacity. In addition to its role as an oncogenic driver, increasing evidence implicates MET as a common mechanism of resistance to targeted therapies including EGFR and VEGFR inhibitors. In the present review, we summarize the current knowledge on the role of the HGF-MET signaling pathway in cancer and its therapeutic targeting (HGF activation inhibitors, HGF inhibitors, MET antagonists and selective/nonselective MET kinase inhibitors). Recent advances in understanding the role of this pathway in the resistance to current anticancer strategies used in lung, kidney and pancreatic cancer are discussed.
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Affiliation(s)
- Ingrid Garajová
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands. ; Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, Sant'Orsola-Malpighi Hospital, Bologna, Italy
| | - Elisa Giovannetti
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands. ; Cancer Pharmacology Lab, AIRC Start-Up Unit, University of Pisa, Pisa, Italy
| | - Guido Biasco
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, Sant'Orsola-Malpighi Hospital, Bologna, Italy
| | - Godefridus J Peters
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands
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16
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Garajová I, Giovannetti E, Biasco G, Peters GJ. c-Met as a Target for Personalized Therapy. TRANSLATIONAL ONCOGENOMICS 2015; 7:13-31. [PMID: 26628860 PMCID: PMC4659440 DOI: 10.4137/tog.s30534] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/20/2015] [Accepted: 09/23/2015] [Indexed: 12/30/2022]
Abstract
MET and its ligand HGF are involved in many biological processes, both physiological and pathological, making this signaling pathway an attractive therapeutic target in oncology. Downstream signaling effects are transmitted via mitogen-activated protein kinase (MAPK), PI3K (phosphoinositide 3-kinase protein kinase B)/AKT, signal transducer and activator of transcription proteins (STAT), and nuclear factor-κB. The final output of the terminal effector components of these pathways is activation of cytoplasmic and nuclear processes leading to increases in cell proliferation, survival, mobilization and invasive capacity. In addition to its role as an oncogenic driver, increasing evidence implicates MET as a common mechanism of resistance to targeted therapies including EGFR and VEGFR inhibitors. In the present review, we summarize the current knowledge on the role of the HGF-MET signaling pathway in cancer and its therapeutic targeting (HGF activation inhibitors, HGF inhibitors, MET antagonists and selective/nonselective MET kinase inhibitors). Recent advances in understanding the role of this pathway in the resistance to current anticancer strategies used in lung, kidney and pancreatic cancer are discussed.
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Affiliation(s)
- Ingrid Garajová
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, Sant’Orsola-Malpighi Hospital, Bologna, Italy
| | - Elisa Giovannetti
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands
- Cancer Pharmacology Lab, AIRC Start-Up Unit, University of Pisa, Pisa, Italy
| | - Guido Biasco
- Department of Experimental, Diagnostic and Speciality Medicine, University of Bologna, Sant’Orsola-Malpighi Hospital, Bologna, Italy
| | - Godefridus J. Peters
- Department of Medical Oncology, VU University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands
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17
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Womeldorff M, Gillespie D, Jensen RL. Hypoxia-inducible factor-1 and associated upstream and downstream proteins in the pathophysiology and management of glioblastoma. Neurosurg Focus 2015; 37:E8. [PMID: 25581937 DOI: 10.3171/2014.9.focus14496] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Glioblastoma multiforme (GBM) is a highly aggressive brain tumor with an exceptionally poor patient outcome despite aggressive therapy including surgery, radiation, and chemotherapy. This aggressive phenotype may be associated with intratumoral hypoxia, which probably plays a key role in GBM tumor growth, development, and angiogenesis. A key regulator of cellular response to hypoxia is the protein hypoxia-inducible factor–1 (HIF-1). An examination of upstream hypoxic and nonhypoxic regulation of HIF-1 as well as a review of the downstream HIF-1– regulated proteins may provide further insight into the role of this transcription factor in GBM pathophysiology. Recent insights into upstream regulators that intimately interact with HIF-1 could provide potential therapeutic targets for treatment of this tumor. The same is potentially true for HIF-1–mediated pathways of glycolysis-, angiogenesis-, and invasion-promoting proteins. Thus, an understanding of the relationship between HIF-1, its upstream protein regulators, and its downstream transcribed genes in GBM pathogenesis could provide future treatment options for the care of patients with these tumors.
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18
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Zhang Y, Doshi S, Zhu M. Pharmacokinetics and pharmacodynamics of rilotumumab: a decade of experience in preclinical and clinical cancer research. Br J Clin Pharmacol 2015; 80:957-64. [PMID: 25912961 DOI: 10.1111/bcp.12663] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/06/2015] [Accepted: 04/20/2015] [Indexed: 12/11/2022] Open
Abstract
Rilotumumab is a fully human monoclonal antibody against hepatocyte growth factor, the only known ligand of the MET receptor. Over the last decade, rilotumumab has been extensively tested in preclinical studies and in clinical studies in a variety of cancer types. In this review, we examine the pharmacokinetic and pharmacodynamic data that have been collected in the rilotumumab programme to date, and discuss retrospectively how the knowledge acquired in this programme can be applied to a number of key issues in oncology drug development, including: (i) using preclinical data to inform first-in-human study design; (ii) the role of biomarkers in the identification of a target patient population; (iii) the potential for drug interactions between therapeutic proteins and other anticancer agents; and (iv) pharmacokinetic and pharmacodynamic considerations in phase 3 study design.
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Affiliation(s)
- Y Zhang
- Department of Clinical Pharmacology, Modeling, and Simulation, Amgen Inc, One Amgen Center Drive, Thousand Oaks, CA, 91320, USA
| | - S Doshi
- Department of Clinical Pharmacology, Modeling, and Simulation, Amgen Inc, One Amgen Center Drive, Thousand Oaks, CA, 91320, USA
| | - M Zhu
- Department of Clinical Pharmacology, Modeling, and Simulation, Amgen Inc, One Amgen Center Drive, Thousand Oaks, CA, 91320, USA
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19
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Alifieris C, Trafalis DT. Glioblastoma multiforme: Pathogenesis and treatment. Pharmacol Ther 2015; 152:63-82. [PMID: 25944528 DOI: 10.1016/j.pharmthera.2015.05.005] [Citation(s) in RCA: 486] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 04/28/2015] [Indexed: 12/12/2022]
Abstract
Each year, about 5-6 cases out of 100,000 people are diagnosed with primary malignant brain tumors, of which about 80% are malignant gliomas (MGs). Glioblastoma multiforme (GBM) accounts for more than half of MG cases. They are associated with high morbidity and mortality. Despite current multimodality treatment efforts including maximal surgical resection if feasible, followed by a combination of radiotherapy and/or chemotherapy, the median survival is short: only about 15months. A deeper understanding of the pathogenesis of these tumors has presented opportunities for newer therapies to evolve and an expectation of better control of this disease. Lately, efforts have been made to investigate tumor resistance, which results from complex alternate signaling pathways, the existence of glioma stem-cells, the influence of the blood-brain barrier as well as the expression of 0(6)-methylguanine-DNA methyltransferase. In this paper, we review up-to-date information on MGs treatment including current approaches, novel drug-delivering strategies, molecular targeted agents and immunomodulative treatments, and discuss future treatment perspectives.
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Affiliation(s)
| | - Dimitrios T Trafalis
- Laboratory of Pharmacology, Medical School, University of Athens, Athens, Greece.
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20
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Interplay between receptor tyrosine kinases and hypoxia signaling in cancer. Int J Biochem Cell Biol 2015; 62:101-14. [DOI: 10.1016/j.biocel.2015.02.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 02/06/2023]
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21
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Zoratti GL, Tanabe LM, Varela FA, Murray AS, Bergum C, Colombo É, Lang JE, Molinolo AA, Leduc R, Marsault E, Boerner J, List K. Targeting matriptase in breast cancer abrogates tumour progression via impairment of stromal-epithelial growth factor signalling. Nat Commun 2015; 6:6776. [PMID: 25873032 PMCID: PMC4749267 DOI: 10.1038/ncomms7776] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 02/24/2015] [Indexed: 02/07/2023] Open
Abstract
Matriptase is an epithelia-specific membrane-anchored serine protease that has received considerable attention in recent years due to its consistent dysregulation in human epithelial tumors, including breast cancer. Mice with reduced levels of matriptase display a significant delay in oncogene-induced mammary tumor formation and blunted tumor growth. The abated tumor growth is associated with a decrease in cancer cell proliferation. Here we demonstrate by genetic deletion and silencing that the proliferation impairment in matriptase deficient breast cancer cells is caused by their inability to initiate activation of the c-Met signaling pathway in response to fibroblast-secreted pro-HGF. Similarly, inhibition of matriptase catalytic activity using a selective small-molecule inhibitor abrogates the activation of c-Met, Gab1 and AKT, in response to pro-HGF, which functionally leads to attenuated proliferation in breast carcinoma cells. We conclude that matriptase is critically involved in breast cancer progression and represents a potential therapeutic target in breast cancer.
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Affiliation(s)
- Gina L Zoratti
- 1] Department of Pharmacology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA [2] Department of Oncology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA [3] Cancer Biology Graduate Program, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 110 E. Warren Avenue, Suite 2215, Detroit, Michigan 48201, USA
| | - Lauren M Tanabe
- Department of Pharmacology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA
| | - Fausto A Varela
- Department of Pharmacology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA
| | - Andrew S Murray
- 1] Department of Pharmacology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA [2] Department of Oncology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA [3] Cancer Biology Graduate Program, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 110 E. Warren Avenue, Suite 2215, Detroit, Michigan 48201, USA
| | - Christopher Bergum
- Department of Pharmacology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA
| | - Éloïc Colombo
- Department of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001 12e Av Nord, Sherbrooke, Quebec J1H 5N4, Canada
| | - Julie E Lang
- Department of Surgery, Norris Comprehensive Cancer Center, University of Southern California, 1510 San Pablo Street, Suite 412, Los Angeles, California 90033, USA
| | - Alfredo A Molinolo
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, 30 Convent Drive, Room 211, Bethesda, Maryland 20892, USA
| | - Richard Leduc
- Department of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001 12e Av Nord, Sherbrooke, Quebec J1H 5N4, Canada
| | - Eric Marsault
- Department of Pharmacology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001 12e Av Nord, Sherbrooke, Quebec J1H 5N4, Canada
| | - Julie Boerner
- Department of Oncology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA
| | - Karin List
- 1] Department of Pharmacology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA [2] Department of Oncology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 540 E Canfield, Scott Hall Room 6332, Detroit, Michigan 48201, USA [3] Cancer Biology Graduate Program, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, 110 E. Warren Avenue, Suite 2215, Detroit, Michigan 48201, USA
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22
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Senetta R, Duregon E, Sonetto C, Spadi R, Mistrangelo M, Racca P, Chiusa L, Munoz FH, Ricardi U, Arezzo A, Cassenti A, Castellano I, Papotti M, Morino M, Risio M, Cassoni P. YKL-40/c-Met expression in rectal cancer biopsies predicts tumor regression following neoadjuvant chemoradiotherapy: a multi-institutional study. PLoS One 2015; 10:e0123759. [PMID: 25875173 PMCID: PMC4398550 DOI: 10.1371/journal.pone.0123759] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 01/21/2015] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Neoadjuvant chemo-radiotherapy (CRT) followed by surgical resection is the standard treatment for locally advanced rectal cancer, although complete tumor pathological regression is achieved in only up to 30% of cases. A clinicopathological and molecular predictive stratification of patients with advanced rectal cancer is still lacking. Here, c-Met and YKL-40 have been studied as putative predictors of CRT response in rectal cancer, due to their reported involvement in chemoradioresistance in various solid tumors. MATERIAL AND METHODS A multicentric study was designed to assess the role of c-Met and YKL-40 expression in predicting chemoradioresistance and to correlate clinical and pathological features with CRT response. Immunohistochemistry and fluorescent in situ hybridization for c-Met were performed on 81 rectal cancer biopsies from patients with locally advanced rectal adenocarcinoma. All patients underwent standard (50.4 gy in 28 fractions + concurrent capecitabine 825 mg/m2) neoadjuvant CRT or the XELOXART protocol. CRT response was documented on surgical resection specimens and recorded as tumor regression grade (TRG) according to the Mandard criteria. RESULTS A significant correlation between c-Met and YKL-40 expression was observed (R = 0.43). The expressions of c-Met and YKL-40 were both significantly associated with a lack of complete response (86% and 87% of c-Met and YKL-40 positive cases, p< 0.01 and p = 0.006, respectively). Thirty of the 32 biopsies co-expressing both markers had partial or absent tumor response (TRG 2-5), strengthening their positive predictive value (94%). The exclusive predictive role of YKL-40 and c-Met was confirmed using a multivariate analysis (p = 0.004 and p = 0.007 for YKL-40 and c-Met, respectively). TRG was the sole morphological parameter associated with poor outcome. CONCLUSION c-Met and YKL-40 expression is a reliable predictor of partial/absent response to neoadjuvant CRT in rectal cancer. Targeted therapy protocols could take advantage of prior evaluations of c-MET and YKL-40 expression levels to increase therapeutic efficacy.
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Affiliation(s)
- Rebecca Senetta
- Department of Medical Sciences, University of Turin, Turin, Italy
| | | | - Cristina Sonetto
- SSCVD Colorectal Cancer Unit, City of Health and Science Hospital of Turin, Turin, Italy
| | - Rossella Spadi
- SSCVD Colorectal Cancer Unit, City of Health and Science Hospital of Turin, Turin, Italy
| | - Massimiliano Mistrangelo
- Digestive and Colorectal Surgery, Centre of Minimal Invasive Surgery, University of Turin, Turin, Italy
| | - Patrizia Racca
- SSCVD Colorectal Cancer Unit, City of Health and Science Hospital of Turin, Turin, Italy
| | - Luigi Chiusa
- Department of Medical Sciences, University of Turin, Turin, Italy
| | | | | | - Alberto Arezzo
- Digestive and Colorectal Surgery, Centre of Minimal Invasive Surgery, University of Turin, Turin, Italy
| | - Adele Cassenti
- Department of Medical Sciences, University of Turin, Turin, Italy
| | | | - Mauro Papotti
- Department of Oncology, University of Turin, Turin, Italy
| | - Mario Morino
- Digestive and Colorectal Surgery, Centre of Minimal Invasive Surgery, University of Turin, Turin, Italy
| | - Mauro Risio
- Candiolo Cancer Institute—FPO (Fondazione del Piemonte per l'0ncologia), IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Candiolo, Turin, Italy
| | - Paola Cassoni
- Department of Medical Sciences, University of Turin, Turin, Italy
- * E-mail:
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23
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Vigna E, Comoglio PM. Targeting the oncogenic Met receptor by antibodies and gene therapy. Oncogene 2014; 34:1883-9. [PMID: 24882574 DOI: 10.1038/onc.2014.142] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 04/22/2014] [Accepted: 04/22/2014] [Indexed: 12/31/2022]
Abstract
The receptor for hepatocyte growth factor (HGF), a tyrosine kinase encoded by the Met oncogene, has a crucial role in cancer growth, invasion and metastasis. It is a validated therapeutic target for 'personalized' treatment of a number of malignancies. Therapeutic tools prompting selective, robust and highly effective Met inhibition potentially represent a major step in the battle against cancer. Antibodies targeting either Met or its ligand HGF, although challenging, demonstrate to be endowed with promising features. Here we briefly review and discuss the state of the art in the field.
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Affiliation(s)
- E Vigna
- University of Torino, Department of Oncology, and Candiolo Cancer Institute, FPO-IRCCS, Candiolo (TO), Italy
| | - P M Comoglio
- University of Torino, Department of Oncology, and Candiolo Cancer Institute, FPO-IRCCS, Candiolo (TO), Italy
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24
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Pouliliou S, Koukourakis MI. Gamma histone 2AX (γ-H2AX)as a predictive tool in radiation oncology. Biomarkers 2014; 19:167-80. [DOI: 10.3109/1354750x.2014.898099] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Stamatia Pouliliou
- Department of Radiotherapy/Oncology, Radiobiology and Radiopathology Unit, Democritus University of Thrace
AlexandroupolisGreece
| | - Michael I. Koukourakis
- Department of Radiotherapy/Oncology, Radiobiology and Radiopathology Unit, Democritus University of Thrace
AlexandroupolisGreece
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The Molecular Crosstalk between the MET Receptor Tyrosine Kinase and the DNA Damage Response-Biological and Clinical Aspects. Cancers (Basel) 2013; 6:1-27. [PMID: 24378750 PMCID: PMC3980615 DOI: 10.3390/cancers6010001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/06/2013] [Accepted: 12/06/2013] [Indexed: 02/07/2023] Open
Abstract
Radiation therapy remains an imperative treatment modality for numerous malignancies. Enduring significant technical achievements both on the levels of treatment planning and radiation delivery have led to improvements in local control of tumor growth and reduction in healthy tissue toxicity. Nevertheless, resistance mechanisms, which presumably also involve activation of DNA damage response signaling pathways that eventually may account for loco-regional relapse and consequent tumor progression, still remain a critical problem. Accumulating data suggest that signaling via growth factor receptor tyrosine kinases, which are aberrantly expressed in many tumors, may interfere with the cytotoxic impact of ionizing radiation via the direct activation of the DNA damage response, leading eventually to so-called tumor radioresistance. The aim of this review is to overview the current known data that support a molecular crosstalk between the hepatocyte growth factor receptor tyrosine kinase MET and the DNA damage response. Apart of extending well established concepts over MET biology beyond its function as a growth factor receptor, these observations directly relate to the role of its aberrant activity in resistance to DNA damaging agents, such as ionizing radiation, which are routinely used in cancer therapy and advocate tumor sensitization towards DNA damaging agents in combination with MET targeting.
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Tandle AT, Kramp T, Kil WJ, Halthore A, Gehlhaus K, Shankavaram U, Tofilon PJ, Caplen NJ, Camphausen K. Inhibition of polo-like kinase 1 in glioblastoma multiforme induces mitotic catastrophe and enhances radiosensitisation. Eur J Cancer 2013; 49:3020-8. [PMID: 23790466 PMCID: PMC3755049 DOI: 10.1016/j.ejca.2013.05.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 05/15/2013] [Indexed: 11/23/2022]
Abstract
Glioblastoma multiforme (GBM) is the most common primary brain tumour in the United States of America (USA) with a median survival of approximately 14 months. Low survival rates are attributable to the aggressiveness of GBM and a lack of understanding of the molecular mechanisms underlying GBM. The disruption of signalling pathways regulated either directly or indirectly by protein kinases is frequently observed in cancer cells and thus the development of inhibitors of specific kinases has become a major focus of drug discovery in oncology. To identify protein kinases required for the survival of GBM we performed a siRNA-based RNAi screen focused on the human kinome in GBM. Inhibition of the polo-like kinase 1 (PLK1) induced a reduction in the viability in two different GBM cell lines. To assess the potential of inhibiting PLK1 as a treatment strategy for GBM we examined the effects of a small molecule inhibitor of PLK1, GSK461364A, on the growth of GBM cells. PLK1 inhibition arrested cells in the mitotic phase of the cell cycle and induced cell kill by mitotic catastrophe. GBM engrafts treated with GSK461364A showed statistically significant inhibition of tumour growth. Further, exposure of different GBM cells to RNAi or GSK461364A prior to radiation resulted in an increase in their radiosensitivity with dose enhancement factor ranging from 1.40 to 1.53 with no effect on normal cells. As a measure of DNA double strand breaks, γH2AX levels were significantly higher in the combined modality as compared to the individual treatments. This study suggests that PLK1 is an important therapeutic target for GBM and can enhance radiosensitivity in GBM.
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Affiliation(s)
- Anita T. Tandle
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
| | - Tamalee Kramp
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
| | - Whoon J Kil
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
| | - Aditya Halthore
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
| | - Kristen Gehlhaus
- Genetics Branch, National Cancer Institute, National Institutes of Health, Bethesda; Maryland
| | - Uma Shankavaram
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
| | - Philip J. Tofilon
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
| | - Natasha J. Caplen
- Genetics Branch, National Cancer Institute, National Institutes of Health, Bethesda; Maryland
| | - Kevin Camphausen
- Radiation Oncology Branch, National Institutes of Health, Bethesda; Maryland
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27
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Rex K, Lewis XZ, Gobalakrishnan S, Glaus C, Silva MD, Radinsky R, Burgess TL, Gambhir SS, Coxon A. Evaluation of the antitumor effects of rilotumumab by PET imaging in a U-87 MG mouse xenograft model. Nucl Med Biol 2013; 40:458-63. [DOI: 10.1016/j.nucmedbio.2013.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 01/15/2013] [Indexed: 01/03/2023]
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Chu SH, Karri S, Ma YB, Feng DF, Li ZQ. In vitro and in vivo radiosensitization induced by hydroxyapatite nanoparticles. Neuro Oncol 2013; 15:880-90. [PMID: 23519742 DOI: 10.1093/neuonc/not030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Previous study showed that hydroxyapatite nanoparticles (nano-HAPs) inhibited glioma growth in vitro and in vivo; and in a drug combination, they could reduce adverse reactions. We investigated the possible enhancement of radiosensitivity induced by nano-HAPs. METHODS In vitro radiosensitization of nano-HAPs was measured using a clonogenic survival assay in human glioblastoma U251 and breast tumor brain metastatic tumor MDA-MB-231BR cells. DNA damage and repair were measured using γH2AX foci, and mitotic catastrophe was determined by immunostaining. The effect of nano-HAPs on in vivo tumor radiosensitivity was investigated in a subcutaneous and an orthotopic model. RESULTS Nano-HAPs enhanced each cell line's radiosensitivity when the exposure was 1 h before irradiation, and they had no significant effect on irradiation-induced apoptosis or on the activation of the G2 cell cycle checkpoint. The number of γH2AX foci per cell was significantly large at 24 h after the combination modality of nano-HAPs + irradiation compared with single treatments. Mitotic catastrophe was also significantly increased at an interval of 72 h in tumor cells receiving the combined modality compared with the individual treatments. In a subcutaneous model, nano-HAPs caused a larger than additive increase in tumor growth delay. In an orthotopic model, nano-HAPs significantly reduced tumor growth and extended the prolongation of survival induced by irradiation. CONCLUSIONS These results show that nano-HAPs can enhance the radiosensitivity of tumor cells in vitro and in vivo through the inhibition of DNA repair, resulting in an increase in mitotic catastrophe.
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Affiliation(s)
- Sheng-Hua Chu
- Department of Neurosurgery, Shanghai 3rd People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 201900, China.
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Bhardwaj V, Cascone T, Cortez MA, Amini A, Evans J, Komaki RU, Heymach JV, Welsh JW. Modulation of c-Met signaling and cellular sensitivity to radiation: potential implications for therapy. Cancer 2013; 119:1768-75. [PMID: 23423860 DOI: 10.1002/cncr.27965] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Revised: 12/12/2012] [Accepted: 12/18/2012] [Indexed: 12/13/2022]
Abstract
The c-Met/hepatocyte growth factor receptor and its family members are known to promote cancer cell migration and invasion. Signaling within and beyond this pathway contributes to the systemic spread of metastases through induction of the epithelial-mesenchymal transition, a process also implicated in mediating resistance to current anticancer therapies, including radiation. Induction of c-Met has also been observed after irradiation, suggesting that c-Met participates in radiation-induced disease progression through the epithelial-mesenchymal transition. Therefore, c-Met inhibition is an attractive target for potentially mitigating radiation resistance. This article summarizes key findings regarding crosstalk between radiotherapy and c-Met and discusses studies performed to date in which c-Met inhibition was used as a strategy to increase cellular radiosensitivity.
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Affiliation(s)
- Vikas Bhardwaj
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Understanding the functions of tumor stroma in resistance to ionizing radiation: Emerging targets for pharmacological modulation. Drug Resist Updat 2013; 16:10-21. [DOI: 10.1016/j.drup.2013.01.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Accepted: 01/14/2013] [Indexed: 02/08/2023]
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Chargari C, Deutsch E. MET targeting: perspectives for the radiation oncologist. Nat Rev Clin Oncol 2012; 9:nrclinonc.2012.71-c1. [DOI: 10.1038/nrclinonc.2012.71-c1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Li W, Graeber MB. The molecular profile of microglia under the influence of glioma. Neuro Oncol 2012; 14:958-78. [PMID: 22573310 DOI: 10.1093/neuonc/nos116] [Citation(s) in RCA: 248] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Microglia, which contribute substantially to the tumor mass of glioblastoma, have been shown to play an important role in glioma growth and invasion. While a large number of experimental studies on functional attributes of microglia in glioma provide evidence for their tumor-supporting roles, there also exist hints in support of their anti-tumor properties. Microglial activities during glioma progression seem multifaceted. They have been attributed to the receptors expressed on the microglia surface, to glioma-derived molecules that have an effect on microglia, and to the molecules released by microglia in response to their environment under glioma control, which can have autocrine effects. In this paper, the microglia and glioma literature is reviewed. We provide a synopsis of the molecular profile of microglia under the influence of glioma in order to help establish a rational basis for their potential therapeutic use. The ability of microglia precursors to cross the blood-brain barrier makes them an attractive target for the development of novel cell-based treatments of malignant glioma.
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Affiliation(s)
- Wei Li
- Brain Tumor Research Laboratories, The Brain and Mind Research Institute, University of Sydney, 94 Mallett St, Camperdown, Sydney, NSW 2050, Australia
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Abstract
The MET pathway is dysregulated in many human cancers and promotes tumour growth, invasion and dissemination. Abnormalities in MET signalling have been reported to correlate with poor clinical outcomes and drug resistance in patients with cancer. Thus, MET has emerged as an attractive target for cancer therapy. Several MET inhibitors have been introduced into the clinic, and are currently in all phases of clinical trials. In general, initial results from these studies indicate only a modest benefit in unselected populations. In this Review, we discuss current challenges in developing MET inhibitors--including identification of predictive biomarkers--as well as the most-efficient ways to combine these drugs with other targeted agents or with classic chemotherapy or radiotherapy.
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Donoghue JF, Bogler O, Johns TG. A simple guide screw method for intracranial xenograft studies in mice. J Vis Exp 2011:3157. [PMID: 21968439 PMCID: PMC3230180 DOI: 10.3791/3157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The grafting of human tumor cells into the brain of immunosuppressed mice is an established method for the study of brain cancers including glioblastoma (glioma) and medulloblastoma. The widely used stereotactic approach only allows for the injection of a single animal at a time, is labor intensive and requires highly specialized equipment. The guide screw method, initially developed by Lal et al.,1 was developed to eliminate cumbersome stereotactic procedures. We now describe a modified guide screw approach that is rapid and exceptionally safe; both of which are critical ethical considerations. Notably, our procedure now incorporates an infusion pump that allows up to 10 animals to be simultaneously injected with tumor cells. To demonstrate the utility of this procedure, we established human U87MG glioma cells as intracranial xenografts in mice, which were then treated with AMG102; a fully human antibody directed to HGF/scatter factor currently undergoing clinical evaluation2-5. Systemic injection of AMG102 significantly prolonged the survival of all mice with intracranial U87MG xenografts and resulted in a number of complete cures. This study demonstrates that the guide screw method is an inexpensive, highly reproducible approach for establishing intracranial xenografts. Furthermore, it provides a relevant physiological model for validating novel therapeutic strategies for the treatment of brain cancers.
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Polykandriotis E, Popescu LM, Horch RE. Regenerative medicine: then and now--an update of recent history into future possibilities. J Cell Mol Med 2011; 14:2350-8. [PMID: 20825521 PMCID: PMC3823153 DOI: 10.1111/j.1582-4934.2010.01169.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The fields of tissue engineering (TE) and regenerative medicine (RegMed) are yet to bring about the anticipated therapeutic revolution. After two decades of extremely high expectations and often disappointing returns both in the medical as well as in the financial arena, this scientific field reflects the sense of a new era and suggests the feeling of making a fresh start although many scientists are probably seeking reorientation. Much of research was industry driven, so that especially in the aftermath of the recent financial meltdown in the last 2 years we have witnessed a biotech asset yard sale. Despite any monetary shortcomings, from a technological point of view there have been great leaps that are yet to find their way to the patient. RegMed is definitely bound to play a major role in our life because it embodies one of the primordial dreams of mankind, such as: everlasting youth, flying, remote communication and setting foot on the moon. The Journal of Cellular and Molecular Medicine has been at the frontier of these developments in TE and RegMed from its beginning and reflects recent scientific advances in both fields. Therefore this review tries to look at RegMed through the keyhole of history which might just be like looking ‘back to the future’.
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Affiliation(s)
- E Polykandriotis
- Department of Plastic and Hand Surgery and Laboratory for Tissue Engineering and Regenerative Medicine, University of Erlangen, Erlangen, Germany
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