1
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Lange F, Gade R, Einsle A, Porath K, Reichart G, Maletzki C, Schneider B, Henker C, Dubinski D, Linnebacher M, Köhling R, Freiman TM, Kirschstein T. A glutamatergic biomarker panel enables differentiating Grade 4 gliomas/astrocytomas from brain metastases. Front Oncol 2024; 14:1335401. [PMID: 38835368 PMCID: PMC11148222 DOI: 10.3389/fonc.2024.1335401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 04/16/2024] [Indexed: 06/06/2024] Open
Abstract
Background The differentiation of high-grade glioma and brain tumors of an extracranial origin is eminent for the decision on subsequent treatment regimens. While in high-grade glioma, a surgical resection of the tumor mass is a fundamental part of current standard regimens, in brain metastasis, the burden of the primary tumor must be considered. However, without a cancer history, the differentiation remains challenging in the imaging. Hence, biopsies are common that may help to identify the tumor origin. An additional tool to support the differentiation may be of great help. For this purpose, we aimed to identify a biomarker panel based on the expression analysis of a small sample of tissue to support the pathological analysis of surgery resection specimens. Given that an aberrant glutamate signaling was identified to drive glioblastoma progression, we focused on glutamate receptors and key players of glutamate homeostasis. Methods Based on surgically resected samples from 55 brain tumors, the expression of ionotropic and metabotropic glutamate receptors and key players of glutamate homeostasis were analyzed by RT-PCR. Subsequently, a receiver operating characteristic (ROC) analysis was performed to identify genes whose expression levels may be associated with either glioblastoma or brain metastasis. Results Out of a total of 29 glutamatergic genes analyzed, nine genes presented a significantly different expression level between high-grade gliomas and brain metastases. Of those, seven were identified as potential biomarker candidates including genes encoding for AMPA receptors GRIA1, GRIA2, kainate receptors GRIK1 and GRIK4, metabotropic receptor GRM3, transaminase BCAT1 and the glutamine synthetase (encoded by GLUL). Overall, the biomarker panel achieved an accuracy of 88% (95% CI: 87.1, 90.8) in predicting the tumor entity. Gene expression data, however, could not discriminate between patients with seizures from those without. Conclusion We have identified a panel of seven genes whose expression may serve as a biomarker panel to discriminate glioblastomas and brain metastases at the molecular level. After further validation, our biomarker signatures could be of great use in the decision making on subsequent treatment regimens after diagnosis.
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Affiliation(s)
- Falko Lange
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock, University of Rostock, Rostock, Germany
| | - Richard Gade
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
| | - Anne Einsle
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
| | - Katrin Porath
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
| | - Gesine Reichart
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
| | - Claudia Maletzki
- Hematology, Oncology, Palliative Medicine, University Medical Center Rostock, Rostock, Germany
| | - Björn Schneider
- Institute of Pathology, University Medical Center Rostock, Rostock, Germany
| | - Christian Henker
- Department of Neurosurgery, University Medical Center Rostock, Rostock, Germany
| | - Daniel Dubinski
- Department of Neurosurgery, University Medical Center Rostock, Rostock, Germany
| | - Michael Linnebacher
- Molecular Oncology and Immunotherapy, Clinic of General Surgery, University Medical Center Rostock, Rostock, Germany
| | - Rüdiger Köhling
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock, University of Rostock, Rostock, Germany
| | - Thomas M Freiman
- Department of Neurosurgery, University Medical Center Rostock, Rostock, Germany
| | - Timo Kirschstein
- Oscar-Langendorff-Institute of Physiology, University Medical Center Rostock, Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock, University of Rostock, Rostock, Germany
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2
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Caridi M, Alborghetti M, Pellicelli V, Orlando R, Pontieri FE, Battaglia G, Arcella A. Metabotropic Glutamate Receptors Type 3 and 5 Feature the "NeuroTransmitter-type" of Glioblastoma: A Bioinformatic Approach. Curr Neuropharmacol 2024; 22:1923-1939. [PMID: 38509672 DOI: 10.2174/1570159x22666240320112926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/11/2023] [Accepted: 09/01/2023] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND Glioblastoma (GBM) represents an aggressive and common tumor of the central nervous system. The prognosis of GBM is poor, and despite a refined genetic and molecular characterization, pharmacological treatment is largely suboptimal. OBJECTIVE Contribute to defining a therapeutic line in GBM targeting the mGlu3 receptor in line with the principles of precision medicine. METHODS Here, we performed a computational analysis focused on the expression of type 3 and 5 metabotropic glutamate receptor subtypes (mGlu3 and mGlu5, respectively) in high- and low-grade gliomas. RESULTS The analysis allowed the identification of a particular high-grade glioma type, characterized by a high expression level of both receptor subtypes and by other markers of excitatory and inhibitory neurotransmission. This so-called neurotransmitter-GBM (NT-GBM) also shows a distinct immunological, metabolic, and vascularization gene signature. CONCLUSION Our findings might lay the groundwork for a targeted therapy to be specifically applied to this putative novel type of GBM.
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Affiliation(s)
- Matteo Caridi
- Division of Hematology and Clinical Immunology, Department of Medicine, University of Perugia, Perugia, Italy
| | - Marika Alborghetti
- Department of Neuroscience, Mental Health and Sensory Organs, Sapienza University of Rome, Rome, Italy
| | | | - Rosamaria Orlando
- Department of Physiology and Pharmacology, University Sapienza of Roma, Rome, Italy
- IRCCS Neuromed, Pozzilli, Italy
| | - Francesco Ernesto Pontieri
- Department of Neuroscience, Mental Health and Sensory Organs, Sapienza University of Rome, Rome, Italy
- IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Giuseppe Battaglia
- Department of Physiology and Pharmacology, University Sapienza of Roma, Rome, Italy
- IRCCS Neuromed, Pozzilli, Italy
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3
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Alqahtani A, Wang M, Lou M, Alachkar H. Genomics and transcriptomic alterations of the glutamate receptors in acute myeloid leukemia. Clin Transl Sci 2023; 16:1828-1841. [PMID: 37670476 PMCID: PMC10582680 DOI: 10.1111/cts.13588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 06/14/2023] [Accepted: 06/17/2023] [Indexed: 09/07/2023] Open
Abstract
Glutamine and glutamate have been widely explored as potential therapeutic targets in acute myeloid leukemia (AML). In addition to its bioenergetic role in leukemia cell proliferation, L-glutamate is a neurotransmitter that acts on glutamate receptors. However, the role of glutamate receptors in AML is largely understudied. Here, we comprehensively analyze the genomic and transcriptomic alterations of glutamate receptor genes in AML using publicly available data. We investigated the frequency of mutations in the glutamate receptor genes and whether an association exist between the presence of these mutations and clinical and molecular characteristics or patient's clinical outcome. We also assessed the dysregulation of glutamate receptor gene expression in AML with and without mutations and whether gene dysregulation is associated with clinical outcomes. We found that 29 (14.5%) of 200 patients with AML had a mutation in at least one glutamate receptor gene. The DNMT3A mutations were significantly more frequent in patients with mutations in at least one glutamate receptor gene compared with patients without mutations (13 of 29 [44.8%] vs. 41 of 171 [23.9%], p value: 0.02). Notably, patients with mutations in at least one glutamate receptor gene survived shorter than patients without mutations; however, the results did not reach statistical significance (overall survival: 15.5 vs. 19.0 months; p value: 0.10). Mutations in the glutamate receptor genes were not associated with changes in gene expression and the transcriptomic levels of glutamate receptor genes were not associated with clinical outcome.
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Affiliation(s)
- Amani Alqahtani
- USC Alfred E. Mann School of Pharmacy and Pharmaceutical SciencesUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
- Department of Clinical Pharmacy, School of PharmacyNajran UniversityNajranSaudi Arabia
| | - Mengxi Wang
- USC Alfred E. Mann School of Pharmacy and Pharmaceutical SciencesUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Mimi Lou
- USC Alfred E. Mann School of Pharmacy and Pharmaceutical SciencesUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Houda Alachkar
- USC Alfred E. Mann School of Pharmacy and Pharmaceutical SciencesUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
- USC Norris Comprehensive Cancer CenterUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
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4
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Staffieri S, Russo V, Oliva MA, Alborghetti M, Russo M, Arcella A. Aloe-Emodin Overcomes Anti-Cancer Drug Resistance to Temozolomide and Prevents Colony Formation and Migration in Primary Human Glioblastoma Cell Lines NULU and ZAR. Molecules 2023; 28:6024. [PMID: 37630276 PMCID: PMC10458156 DOI: 10.3390/molecules28166024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/21/2023] [Accepted: 07/23/2023] [Indexed: 08/27/2023] Open
Abstract
Glioblastoma, the most dangerous and aggressive type of CNS tumor, appears resistant to many chemotherapy drugs. In the patient-derived glioma cell lines NULU and ZAR, which exhibit drug-resistant phenotypes, we investigated the effect of combined AE (Aloe-emodin) and TMZ (temozolomide) and found a significant additive inhibitory effect on cell growth and a promising cytotoxic effect on both cell lines compared to treatment with single agents. We also examined the effect of combined AE and TMZ treatment on the drug-resistance protein MGMT. The results suggest that using AE combined with traditional drugs restores drug resistance in both primary resistant cell lines (NULU and ZAR). Furthermore, migration assays and scratch tests showed that the combined use of AE and TMZ can slow down the colony formation and migration of glioblastoma cells. These convincing results suggest that AE could be a natural adjuvant agent to potentiate the effects of traditional drugs (TMZ) and overcome drug resistance in glioblastoma cells.
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Affiliation(s)
- Sabrina Staffieri
- IRCCS Istituto Neurologico Mediterraneo NEUROMED, Via Atinense 18, 86077 Pozzilli, Italy; (S.S.); (V.R.); (M.A.O.)
| | - Veronica Russo
- IRCCS Istituto Neurologico Mediterraneo NEUROMED, Via Atinense 18, 86077 Pozzilli, Italy; (S.S.); (V.R.); (M.A.O.)
| | - Maria Antonietta Oliva
- IRCCS Istituto Neurologico Mediterraneo NEUROMED, Via Atinense 18, 86077 Pozzilli, Italy; (S.S.); (V.R.); (M.A.O.)
| | - Marika Alborghetti
- Department of Neurosciences, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, 00185 Rome, Italy;
| | - Miriam Russo
- Dipartimento di Bioscienze e Territorio, Università Degli Studi del Molise, Contrada Fonte Lappone, 86090 Pesche, Italy;
| | - Antonietta Arcella
- IRCCS Istituto Neurologico Mediterraneo NEUROMED, Via Atinense 18, 86077 Pozzilli, Italy; (S.S.); (V.R.); (M.A.O.)
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5
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D'Alessandris QG, Menna G, Izzo A, D'Ercole M, Della Pepa GM, Lauretti L, Pallini R, Olivi A, Montano N. Neuromodulation for Brain Tumors: Myth or Reality? A Narrative Review. Int J Mol Sci 2023; 24:11738. [PMID: 37511496 PMCID: PMC10380317 DOI: 10.3390/ijms241411738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
In recent years, research on brain cancers has turned towards the study of the interplay between the tumor and its host, the normal brain. Starting from the establishment of a parallelism between neurogenesis and gliomagenesis, the influence of neuronal activity on the development of brain tumors, particularly gliomas, has been partially unveiled. Notably, direct electrochemical synapses between neurons and glioma cells have been identified, paving the way for new approaches for the cure of brain cancers. Since this novel field of study has been defined "cancer neuroscience", anticancer therapeutic approaches exploiting these discoveries can be referred to as "cancer neuromodulation". In the present review, we provide an up-to-date description of the novel findings and of the therapeutic neuromodulation perspectives in cancer neuroscience. We focus both on more traditional oncologic approaches, aimed at modulating the major pathways involved in cancer neuroscience through drugs or genetic engineering techniques, and on electric stimulation proposals; the latter is at the cutting-edge of neuro-oncology.
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Affiliation(s)
- Quintino Giorgio D'Alessandris
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Grazia Menna
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
| | - Alessandro Izzo
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Manuela D'Ercole
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Giuseppe Maria Della Pepa
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Liverana Lauretti
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Roberto Pallini
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Alessandro Olivi
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
| | - Nicola Montano
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy
- Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy
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6
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Torres ID, Loureiro JA, Coelho MAN, Carmo Pereira M, Ramalho MJ. Drug delivery in glioblastoma therapy: a review on nanoparticles targeting MGMT-mediated resistance. Expert Opin Drug Deliv 2022; 19:1397-1415. [DOI: 10.1080/17425247.2022.2124967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Inês David Torres
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Joana Angélica Loureiro
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Manuel A N Coelho
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Maria Carmo Pereira
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Maria João Ramalho
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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7
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Chuang JMJ, Hueng DY. Letter to the Editor. Treatment of MGMT-positive glioblastoma. J Neurosurg 2021; 135:1904-1905. [PMID: 34359043 DOI: 10.3171/2021.3.jns21571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jimmy Ming-Jung Chuang
- 1Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Dueng-Yuan Hueng
- 2Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
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8
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Cytotoxicity Effect of Quinoin, Type 1 Ribosome-Inactivating Protein from Quinoa Seeds, on Glioblastoma Cells. Toxins (Basel) 2021; 13:toxins13100684. [PMID: 34678977 PMCID: PMC8537469 DOI: 10.3390/toxins13100684] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/22/2021] [Accepted: 09/22/2021] [Indexed: 12/26/2022] Open
Abstract
Ribosome-inactivating proteins (RIPs) are found in several edible plants and are well characterized. Many studies highlight their use in cancer therapy, alone or as immunoconjugates, linked to monoclonal antibodies directed against target cancer cells. In this context, we investigate the cytotoxicity of quinoin, a novel type 1 RIP from quinoa seeds, on human continuous and primary glioblastoma cell lines. The cytotoxic effect of quinoin was assayed on human continuous glioblastoma U87Mg cells. Moreover, considering that common conventional glioblastoma multiforme (GBM) cell lines are genetically different from the tumors from which they derive, the cytotoxicity of quinoin was subsequently tested towards primary cells NULU and ZAR (two cell lines established from patients’ gliomas), also in combination with the chemotherapeutic agent temozolomide (TMZ), currently used in glioblastoma treatment. The present study demonstrated that quinoin (2.5 and 5.0 nM) strongly reduced glioblastoma cells’ growth. The mechanisms responsible for the inhibitory action of quinoin are different in the tested primary cell lines, reproducing the heterogeneous response of glioblastoma cells. Interestingly, primary cells treated with quinoin in combination with TMZ were more sensitive to the treatment. Overall, our data highlight that quinoin could represent a novel tool for glioblastoma therapy and a possible adjuvant for the treatment of the disease in combination with TMZ, alone or as possible immunoconjugates/nanoconstructs.
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9
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Eddy K, Chen S. Glutamatergic Signaling a Therapeutic Vulnerability in Melanoma. Cancers (Basel) 2021; 13:3874. [PMID: 34359771 PMCID: PMC8345431 DOI: 10.3390/cancers13153874] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/15/2021] [Accepted: 07/29/2021] [Indexed: 01/03/2023] Open
Abstract
Like other cancers, melanomas are associated with the hyperactivation of two major cell signaling cascades, the MAPK and PI3K/AKT pathways. Both pathways are activated by numerous genes implicated in the development and progression of melanomas such as mutated BRAF, RAS, and NF1. Our lab was the first to identify yet another driver of melanoma, Metabotropic Glutamate Receptor 1 (protein: mGluR1, mouse gene: Grm1, human gene: GRM1), upstream of the MAPK and PI3K/AKT pathways. Binding of glutamate, the natural ligand of mGluR1, activates MAPK and PI3K/AKT pathways and sets in motion the deregulated cellular responses in cell growth, cell survival, and cell metastasis. In this review, we will assess the proposed modes of action that mediate the oncogenic properties of mGluR1 in melanoma and possible application of anti-glutamatergic signaling modulator(s) as therapeutic strategy for the treatment of melanomas.
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Affiliation(s)
- Kevinn Eddy
- Graduate Program in Cellular and Molecular Pharmacology, School of Graduate Studies, Rutgers University, Piscataway, NJ 08854, USA;
- Susan Lehman Cullman Laboratory for Cancer Research, Rutgers University, Piscataway, NJ 08854, USA
| | - Suzie Chen
- Graduate Program in Cellular and Molecular Pharmacology, School of Graduate Studies, Rutgers University, Piscataway, NJ 08854, USA;
- Susan Lehman Cullman Laboratory for Cancer Research, Rutgers University, Piscataway, NJ 08854, USA
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ 08901, USA
- Environmental & Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, USA
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10
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Maier JP, Ravi VM, Kueckelhaus J, Behringer SP, Garrelfs N, Will P, Sun N, von Ehr J, Goeldner JM, Pfeifer D, Follo M, Hannibal L, Walch AK, Hofmann UG, Beck J, Heiland DH, Schnell O, Joseph K. Inhibition of metabotropic glutamate receptor III facilitates sensitization to alkylating chemotherapeutics in glioblastoma. Cell Death Dis 2021; 12:723. [PMID: 34290229 PMCID: PMC8295384 DOI: 10.1038/s41419-021-03937-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/11/2021] [Accepted: 06/14/2021] [Indexed: 01/20/2023]
Abstract
Glioblastoma (GBM), the most malignant tumor of the central nervous system, is marked by its dynamic response to microenvironmental niches. In particular, this cellular plasticity contributes to the development of an immediate resistance during tumor treatment. Novel insights into the developmental trajectory exhibited by GBM show a strong capability to respond to its microenvironment by clonal selection of specific phenotypes. Using the same mechanisms, malignant GBM do develop intrinsic mechanisms to resist chemotherapeutic treatments. This resistance was reported to be sustained by the paracrine and autocrine glutamate signaling via ionotropic and metabotropic receptors. However, the extent to which glutamatergic signaling modulates the chemoresistance and transcriptional profile of the GBM remains unexplored. In this study we aimed to map the manifold effects of glutamate signaling in GBM as the basis to further discover the regulatory role and interactions of specific receptors, within the GBM microenvironment. Our work provides insights into glutamate release dynamics, representing its importance for GBM growth, viability, and migration. Based on newly published multi-omic datasets, we explored the and characterized the functions of different ionotropic and metabotropic glutamate receptors, of which the metabotropic receptor 3 (GRM3) is highlighted through its modulatory role in maintaining the ability of GBM cells to evade standard alkylating chemotherapeutics. We addressed the clinical relevance of GRM3 receptor expression in GBM and provide a proof of concept where we manipulate intrinsic mechanisms of chemoresistance, driving GBM towards chemo-sensitization through GRM3 receptor inhibition. Finally, we validated our findings in our novel human organotypic section-based tumor model, where GBM growth and proliferation was significantly reduced when GRM3 inhibition was combined with temozolomide application. Our findings present a new picture of how glutamate signaling via mGluR3 interacts with the phenotypical GBM transcriptional programs in light of recently published GBM cell-state discoveries.
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Affiliation(s)
- Julian P Maier
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Vidhya M Ravi
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany.,Neuroelectronic Systems, Medical Center-University of Freiburg, Freiburg, Germany
| | - Jan Kueckelhaus
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Simon P Behringer
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Niklas Garrelfs
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Paulina Will
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Na Sun
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Jasmin von Ehr
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Jonathan M Goeldner
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Dietmar Pfeifer
- Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Hematology, Oncology and Stem Cell Transplantation, Medical Center-University of Freiburg, Freiburg, Germany
| | - Marie Follo
- Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Medicine I, Medical Center-University of Freiburg, Freiburg, Germany
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Axel Karl Walch
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Ulrich G Hofmann
- Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Neuroelectronic Systems, Medical Center-University of Freiburg, Freiburg, Germany
| | - Jürgen Beck
- Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dieter Henrik Heiland
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Oliver Schnell
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany.,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany
| | - Kevin Joseph
- Microenvironment and Immunology Research Laboratory, Medical Center-University of Freiburg, Freiburg, Germany. .,Department of Neurosurgery, Medical Center-University of Freiburg, Freiburg, Germany. .,Faculty of Medicine, University of Freiburg, Freiburg, Germany. .,Translational NeuroOncology Research Group, Medical Center-University of Freiburg, Freiburg, Germany. .,Neuroelectronic Systems, Medical Center-University of Freiburg, Freiburg, Germany.
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11
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D’Alessandro G, Lauro C, Quaglio D, Ghirga F, Botta B, Trettel F, Limatola C. Neuro-Signals from Gut Microbiota: Perspectives for Brain Glioma. Cancers (Basel) 2021; 13:2810. [PMID: 34199968 PMCID: PMC8200200 DOI: 10.3390/cancers13112810] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/25/2021] [Accepted: 06/01/2021] [Indexed: 12/15/2022] Open
Abstract
Glioblastoma (GBM) is the most aggressive form of glioma tumor in adult brain. Among the numerous factors responsible for GBM cell proliferation and invasion, neurotransmitters such as dopamine, serotonin and glutamate can play key roles. Studies performed in mice housed in germ-free (GF) conditions demonstrated the relevance of the gut-brain axis in a number of physiological and pathological conditions. The gut-brain communication is made possible by vagal/nervous and blood/lymphatic routes and pave the way for reciprocal modulation of functions. The gut microbiota produces and consumes a wide range of molecules, including neurotransmitters (dopamine, norepinephrine, serotonin, gamma-aminobutyric acid [GABA], and glutamate) that reach their cellular targets through the bloodstream. Growing evidence in animals suggests that modulation of these neurotransmitters by the microbiota impacts host neurophysiology and behavior, and affects neural cell progenitors and glial cells, along with having effects on tumor cell growth. In this review we propose a new perspective connecting neurotransmitter modulation by gut microbiota to glioma progression.
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Affiliation(s)
- Giuseppina D’Alessandro
- Department of Physiology and Pharmacology, Sapienza University, 00185 Rome, Italy; (G.D.); (C.L.); (F.T.)
- IRCCS Neuromed, 86077 Pozzilli, IS, Italy
| | - Clotilde Lauro
- Department of Physiology and Pharmacology, Sapienza University, 00185 Rome, Italy; (G.D.); (C.L.); (F.T.)
| | - Deborah Quaglio
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018−2022”, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy; (D.Q.); (F.G.); (B.B.)
| | - Francesca Ghirga
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018−2022”, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy; (D.Q.); (F.G.); (B.B.)
| | - Bruno Botta
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018−2022”, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy; (D.Q.); (F.G.); (B.B.)
| | - Flavia Trettel
- Department of Physiology and Pharmacology, Sapienza University, 00185 Rome, Italy; (G.D.); (C.L.); (F.T.)
| | - Cristina Limatola
- IRCCS Neuromed, 86077 Pozzilli, IS, Italy
- Department of Physiology and Pharmacology, Sapienza University, Laboratory Affiliated to Istituto Pasteur Italia, 00185 Rome, Italy
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12
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Lange F, Hörnschemeyer J, Kirschstein T. Glutamatergic Mechanisms in Glioblastoma and Tumor-Associated Epilepsy. Cells 2021; 10:cells10051226. [PMID: 34067762 PMCID: PMC8156732 DOI: 10.3390/cells10051226] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 12/21/2022] Open
Abstract
The progression of glioblastomas is associated with a variety of neurological impairments, such as tumor-related epileptic seizures. Seizures are not only a common comorbidity of glioblastoma but often an initial clinical symptom of this cancer entity. Both, glioblastoma and tumor-associated epilepsy are closely linked to one another through several pathophysiological mechanisms, with the neurotransmitter glutamate playing a key role. Glutamate interacts with its ionotropic and metabotropic receptors to promote both tumor progression and excitotoxicity. In this review, based on its physiological functions, our current understanding of glutamate receptors and glutamatergic signaling will be discussed in detail. Furthermore, preclinical models to study glutamatergic interactions between glioma cells and the tumor-surrounding microenvironment will be presented. Finally, current studies addressing glutamate receptors in glioma and tumor-related epilepsy will be highlighted and future approaches to interfere with the glutamatergic network are discussed.
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Affiliation(s)
- Falko Lange
- Oscar-Langendorff-Institute of Physiology, Rostock University Medical Center, 18057 Rostock, Germany;
- Center for Transdisciplinary Neurosciences Rostock, University of Rostock, 18147 Rostock, Germany
- Correspondence: (F.L.); (T.K.)
| | - Julia Hörnschemeyer
- Oscar-Langendorff-Institute of Physiology, Rostock University Medical Center, 18057 Rostock, Germany;
| | - Timo Kirschstein
- Oscar-Langendorff-Institute of Physiology, Rostock University Medical Center, 18057 Rostock, Germany;
- Center for Transdisciplinary Neurosciences Rostock, University of Rostock, 18147 Rostock, Germany
- Correspondence: (F.L.); (T.K.)
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13
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Qunies AM, Emmitte KA. Negative allosteric modulators of group II metabotropic glutamate receptors: A patent review (2015 - present). Expert Opin Ther Pat 2021; 31:687-708. [PMID: 33719801 DOI: 10.1080/13543776.2021.1903431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Group II metabotropic glutamate (mGlu) receptors have emerged as an attractive potential target for the development of novel CNS therapeutics in areas such as Alzheimer's disease (AD), anxiety, cognitive disorders, depression, and others. Several small molecules that act as negative allosteric modulators (NAMs) on these receptors have demonstrated efficacy and/or target engagement in animal models, and one molecule (decoglurant) has been advanced into clinical trials. AREAS COVERED This review summarizes patent applications published between January 2015 and November 2020. It is divided into three sections: (1) small molecule nonselective mGlu2/3 NAMs, (2) small molecule selective mGlu2 NAMs, and (3) small molecule selective mGlu3 NAMs. EXPERT OPINION Much progress has been made in the discovery of novel small molecule mGlu2 NAMs. Still, chemical diversity remains somewhat limited and room for expansion remains. Progress with mGlu3 NAMs has been more limited; however, some promising molecules have been disclosed. The process of elucidating the precise role of each receptor in the diseases associated with group II receptors has begun. Continued studies in animals with selective NAMs for both receptors will be critical in the coming years to inform researchers on the right compound profile and patient population for clinical development.
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Affiliation(s)
- Alshaima'a M Qunies
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA.,Graduate School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Kyle A Emmitte
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX, USA
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14
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Wirsching HG, Silginer M, Ventura E, Macnair W, Burghardt I, Claassen M, Gatti S, Wichmann J, Riemer C, Schneider H, Weller M. Negative allosteric modulators of metabotropic glutamate receptor 3 target the stem-like phenotype of glioblastoma. Mol Ther Oncolytics 2021; 20:166-174. [PMID: 33575479 PMCID: PMC7851500 DOI: 10.1016/j.omto.2020.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/21/2020] [Indexed: 11/14/2022] Open
Abstract
Glioblastoma is an invariably deadly disease. A subpopulation of glioma stem-like cells (GSCs) drives tumor progression and treatment resistance. Two recent studies demonstrated that neurons form oncogenic glutamatergic electrochemical synapses with post-synaptic GSCs. This led us to explore whether glutamate signaling through G protein-coupled metabotropic receptors would also contribute to the malignancy of glioblastoma. We found that glutamate metabotropic receptor (Grm)3 is the predominantly expressed Grm in glioblastoma. Associations of GRM3 gene expression levels with survival are confined to the proneural gene expression subtype, which is associated with enrichment of GSCs. Using multiplexed single-cell qRT-PCR, GSC marker-based cell sorting, database interrogations, and functional assays in GSCs derived from patients' tumors, we establish Grm3 as a novel marker and potential therapeutic target in GSCs. We confirm that Grm3 inhibits adenylyl cyclase and regulates extracellular signal-regulated kinase. Targeting Grm3 disrupts self-renewal and promotes differentiation of GSCs. Thus, we hypothesize that Grm3 signaling may complement oncogenic functions of glutamatergic ionotropic receptor activity in neuroglial synapses, supporting a link between neuronal activity and the GSC phenotype. The novel class of highly specific Grm3 inhibitors that we characterize herein have been clinically tested as cognitive enhancers in humans with a favorable safety profile.
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Affiliation(s)
- Hans-Georg Wirsching
- Department of Neurology, University Hospital Zurich and University of Zurich, 8091 Zurich, Switzerland
| | - Manuela Silginer
- Department of Neurology, University Hospital Zurich and University of Zurich, 8091 Zurich, Switzerland
| | - Elisa Ventura
- Department of Neurology, University Hospital Zurich and University of Zurich, 8091 Zurich, Switzerland
| | - Will Macnair
- Institute of Molecular Systems Biology, ETH Zurich, 8093 Zurich, Switzerland
| | - Isabel Burghardt
- Department of Neurology, University Hospital Zurich and University of Zurich, 8091 Zurich, Switzerland
| | - Manfred Claassen
- Institute of Molecular Systems Biology, ETH Zurich, 8093 Zurich, Switzerland
| | - Silvia Gatti
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., 4070 Basel, Switzerland
| | - Jürgen Wichmann
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., 4070 Basel, Switzerland
| | - Claus Riemer
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., 4070 Basel, Switzerland
| | - Hannah Schneider
- Department of Neurology, University Hospital Zurich and University of Zurich, 8091 Zurich, Switzerland
| | - Michael Weller
- Department of Neurology, University Hospital Zurich and University of Zurich, 8091 Zurich, Switzerland
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15
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Sareddy GR, Pratap UP, Venkata PP, Zhou M, Alejo S, Viswanadhapalli S, Tekmal RR, Brenner AJ, Vadlamudi RK. Activation of estrogen receptor beta signaling reduces stemness of glioma stem cells. Stem Cells 2021; 39:536-550. [PMID: 33470499 DOI: 10.1002/stem.3337] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 11/26/2020] [Accepted: 12/01/2020] [Indexed: 11/08/2022]
Abstract
Glioblastoma (GBM) is the most common and deadliest tumor of the central nervous system. GBM has poor prognosis and glioma stem cells (GSCs) are implicated in tumor initiation and therapy resistance. Estrogen receptor β (ERβ) is expressed in GBM and exhibit tumor suppressive function. However, the role of ERβ in GSCs and the therapeutic potential of ERβ agonists on GSCs remain largely unknown. Here, we examined whether ERβ modulates GSCs stemness and tested the utility of two ERβ selective agonists (LY500307 and Liquiritigenin) to reduce the stemness of GSCs. The efficacy of ERβ agonists was examined on GSCs isolated from established and patient derived GBMs. Our results suggested that knockout of ERβ increased the proportion of CD133+ and SSEA+ positive GSCs and overexpression of ERβ reduced the proportion of GSCs in GBM cells. Overexpression of ERβ or treatment with ERβ agonists significantly inhibited the GSCs cell viability, neurosphere formation, self-renewal ability, induced the apoptosis and reduced expression of stemness markers in GSCs. RNA sequencing analysis revealed that ERβ agonist modulate pathways related to stemness, differentiation and apoptosis. Mechanistic studies showed that ERβ overexpression or agonist treatment reduced glutamate receptor signaling pathway and induced apoptotic pathways. In orthotopic models, ERβ overexpression or ERβ agonists treatment significantly reduced the GSCs mediated tumor growth and improved the mice overall survival. Immunohistochemical studies demonstrated that ERβ overexpression decreased SOX2 and GRM3 expression and increased expression of GFAP in tumors. These results suggest that ERβ activation could be a promising therapeutic strategy to eradicate GSCs.
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Affiliation(s)
- Gangadhara R Sareddy
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA.,Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Uday P Pratap
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Prabhakar Pitta Venkata
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Mei Zhou
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA.,Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha Shi, Hunan, People's Republic of China
| | - Salvador Alejo
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Suryavathi Viswanadhapalli
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA.,Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Rajeshwar R Tekmal
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA.,Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Andrew J Brenner
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas, USA.,Hematology & Oncology, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas, USA.,Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas, USA
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16
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Zinni M, Mairesse J, Pansiot J, Fazio F, Iacovelli L, Antenucci N, Orlando R, Nicoletti F, Vaiman D, Baud O. mGlu3 receptor regulates microglial cell reactivity in neonatal rats. J Neuroinflammation 2021; 18:13. [PMID: 33407565 PMCID: PMC7789385 DOI: 10.1186/s12974-020-02049-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 12/09/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Perinatal inflammation is a key factor of brain vulnerability in neonates born preterm or with intra-uterine growth restriction (IUGR), two leading conditions associated with brain injury and responsible for neurocognitive and behavioral disorders. Systemic inflammation is recognized to activate microglia, known to be the critical modulators of brain vulnerability. Although some evidence supports a role for metabotropic glutamate receptor 3 (mGlu3 receptor) in modulation of neuroinflammation, its functions are still unknown in the developing microglia. METHODS We used a double-hit rat model of perinatal brain injury induced by a gestational low-protein diet combined with interleukin-1β injections (LPD/IL-1β), mimicking both IUGR and prematurity-related inflammation. The effect of LPD/IL-1β on mGlu3 receptor expression and the effect of mGlu3 receptor modulation on microglial reactivity were investigated using a combination of pharmacological, histological, and molecular and genetic approaches. RESULTS Exposure to LPD/IL-1β significantly downregulated Grm3 gene expression in the developing microglia. Both transcriptomic analyses and pharmacological modulation of mGlu3 receptor demonstrated its central role in the control of inflammation in resting and activated microglia. Microglia reactivity to inflammatory challenge induced by LPD/IL-1β exposure was reduced by an mGlu3 receptor agonist. Conversely, both specific pharmacological blockade, siRNA knock-down, and genetic knock-out of mGlu3 receptors mimicked the pro-inflammatory phenotype observed in microglial cells exposed to LPD/IL-1β. CONCLUSIONS Overall, these data show that Grm3 plays a central role in the regulation of microglial reactivity in the immature brain. Selective pharmacological activation of mGlu3 receptors may prevent inflammatory-induced perinatal brain injury.
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Affiliation(s)
- Manuela Zinni
- Inserm UMR1141 NeuroDiderot, Univ. Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Jérôme Mairesse
- Inserm UMR1141 NeuroDiderot, Univ. Paris Diderot, Sorbonne Paris Cité, Paris, France.,Laboratory of Child Growth and Development, University of Geneva, Geneva, Switzerland
| | - Julien Pansiot
- Inserm UMR1141 NeuroDiderot, Univ. Paris Diderot, Sorbonne Paris Cité, Paris, France
| | | | - Luisa Iacovelli
- Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy
| | - Nico Antenucci
- Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy
| | - Rosamaria Orlando
- Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy
| | - Ferdinando Nicoletti
- IRCCS Neuromed, Pozzilli, Italy.,Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy
| | - Daniel Vaiman
- Institut Cochin, Inserm U1016, UMR8104 CNRS, Paris, France
| | - Olivier Baud
- Inserm UMR1141 NeuroDiderot, Univ. Paris Diderot, Sorbonne Paris Cité, Paris, France. .,Laboratory of Child Growth and Development, University of Geneva, Geneva, Switzerland. .,Division of Neonatology and Pediatric Intensive Care, Children's University Hospital of Geneva, Geneva, Switzerland.
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17
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Oliva MA, Staffieri S, Castaldo S, Giangaspero F, Esposito V, Arcella A. Characterization of primary glioma cell lines derived from the patients according to 2016 CNS tumour WHO classification and comparison with their parental tumours. J Neurooncol 2021; 151:123-133. [PMID: 33398536 DOI: 10.1007/s11060-020-03673-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 12/04/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Gliomas represent about 80% of primary brain tumours and about 30% of malignant ones, which today don't have a resolution therapy because of their variability. A valid model for the study of new personalized therapies can be represented by primary cultures from patient's tumour biopsies. METHODS In this study we consider 12 novel cell lines established from patients' gliomas and immunohistochemically and molecularly characterized according to the newly updated 2016 CNS Tumour WHO classification. RESULTS Eight of these lines were glioblastoma cells, two grade III glioma cells (anaplastic astrocytoma and oligo astrocytoma) and two low grade glioma cells (grade II astrocytoma and oligodendroglioma). All cell lines were analysed by immunohistochemistry for specific glioma markers, respectively VIMENTIN, GFAP, IDH1R132, and ATRX. The methylation status of the MGMT gene promoter was also determined in all lines. The comparison of the immunohistochemical characteristics and of the MGMT methylation status of the lines with the tissues of origin shows that the cells in culture maintain the same characteristics. CONCLUSIONS Human cancer cell lines represent a support in the knowledge of tumour biology and in drug discovery through its facile experimental manipulation. TRIAL REGISTRATION NCT04180046.
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Affiliation(s)
- Maria Antonietta Oliva
- , Via Atinense 18, IRCCS Istituto Neurologico Mediterraneo NEUROMED, 86077, Pozzilli, IS, Italy
| | - Sabrina Staffieri
- , Via Atinense 18, IRCCS Istituto Neurologico Mediterraneo NEUROMED, 86077, Pozzilli, IS, Italy
| | - Salvatore Castaldo
- , Via Atinense 18, IRCCS Istituto Neurologico Mediterraneo NEUROMED, 86077, Pozzilli, IS, Italy
| | - Felice Giangaspero
- , Via Atinense 18, IRCCS Istituto Neurologico Mediterraneo NEUROMED, 86077, Pozzilli, IS, Italy.,, University of Rome La Sapienza, Rome, Italy
| | - Vincenzo Esposito
- , Via Atinense 18, IRCCS Istituto Neurologico Mediterraneo NEUROMED, 86077, Pozzilli, IS, Italy.,, University of Rome La Sapienza, Rome, Italy
| | - Antonietta Arcella
- , Via Atinense 18, IRCCS Istituto Neurologico Mediterraneo NEUROMED, 86077, Pozzilli, IS, Italy.
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18
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Bridging the Metabolic Parallels Between Neurological Diseases and Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1311:229-248. [PMID: 34014547 DOI: 10.1007/978-3-030-65768-0_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite the many recent breakthroughs in cancer research, oncology has traditionally been seen as a distinct field from other diseases. Recently, more attention has been paid to repurposing established therapeutic strategies and targets of other diseases towards cancer treatment, with some of these attempts generating promising outcomes [1, 2]. Recent studies using advanced metabolomics technologies [3] have shown evidence of close metabolic similarities between cancer and neurological diseases. These studies have unveiled several metabolic characteristics shared by these two categories of diseases, including metabolism of glutamine, gamma-aminobutyric acid (GABA), and N-acetyl-aspartyl-glutamate (NAAG) [4-6]. The striking metabolic overlap between cancer and neurological diseases sheds light on novel therapeutic strategies for cancer treatment. For example, 2-(phosphonomethyl) pentanedioic acid (2-PMPA), one of the glutamate carboxypeptidase II (GCP II) inhibitors that prevent the conversion of NAAG to glutamate, has been shown to suppress cancer growth [6, 7]. These promising results have led to an increased interest in integrating this metabolic overlap between cancer and neurological diseases into the study of cancer metabolism. The advantages of studying this metabolic overlap include not only drug repurposing but also translating existing knowledge from neurological diseases to the field of cancer research. This chapter discusses the specific overlapping metabolic features between cancer and neurological diseases, focusing on glutamine, GABA, and NAAG metabolisms. Understanding the interconnections between cancer and neurological diseases will guide researchers and clinicians to find more effective cancer treatments.
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19
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Rotondo R, Oliva MA, Staffieri S, Castaldo S, Giangaspero F, Arcella A. Implication of Lactucopicrin in Autophagy, Cell Cycle Arrest and Oxidative Stress to Inhibit U87Mg Glioblastoma Cell Growth. Molecules 2020; 25:molecules25245843. [PMID: 33322048 PMCID: PMC7764785 DOI: 10.3390/molecules25245843] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/04/2020] [Accepted: 12/08/2020] [Indexed: 12/30/2022] Open
Abstract
In this study, we propose lactucopicrin (LCTP), a natural sesquiterpene lactone from Lactucavirosa, as a molecule able to control the growth of glioblastoma continuous cell line U87Mg. The IC50 of U87Mg against LCTP revealed a strong cytotoxic effect. Daily administration of LCTP showed a dose and time-dependent reduction of GBM cell growth and viability, also confirmed by inhibition of clonogenic potential and mobility of U87Mg cells. LCTP activated autophagy in U87Mg cells and decreased the phosphorylation of proliferative signals pAKT and pERK. LCTP also induced the cell cycle arrest in G2/M phase, confirmed by decrease of CDK2 protein and increase of p53 and p21. LCTP stimulated apoptosis as evidenced by reduction of procaspase 6 and the increase of the cleaved/full-length PARP ratio. The pre-treatment of U87Mg cells with ROS scavenger N-acetylcysteine (NAC), which reversed its cytotoxic effect, showed the involvement of LCTP in oxidative stress. Finally, LCTP strongly enhanced the sensitivity of U87Mg cells to canonical therapy Temozolomide (TMZ) and synergized with this drug. Altogether, the growth inhibition of U87Mg GBM cells induced by LCTP is the result of several synergic mechanisms, which makes LCTP a promising adjuvant therapy for this complex pathology.
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Affiliation(s)
- Rossella Rotondo
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, 80131 Naples, Italy;
| | - Maria Antonietta Oliva
- I.R.C.C.S Neuromed, Via Atinense, 18, 86077 Pozzilli IS, Italy; (M.A.O.); (S.S.); (S.C.); (F.G.)
| | - Sabrina Staffieri
- I.R.C.C.S Neuromed, Via Atinense, 18, 86077 Pozzilli IS, Italy; (M.A.O.); (S.S.); (S.C.); (F.G.)
| | - Salvatore Castaldo
- I.R.C.C.S Neuromed, Via Atinense, 18, 86077 Pozzilli IS, Italy; (M.A.O.); (S.S.); (S.C.); (F.G.)
| | - Felice Giangaspero
- I.R.C.C.S Neuromed, Via Atinense, 18, 86077 Pozzilli IS, Italy; (M.A.O.); (S.S.); (S.C.); (F.G.)
- Department of Radiologic, Oncologic and Anatomo Pathological Sciences, University of Rome La Sapienza, 00185 Rome, Italy
| | - Antonietta Arcella
- I.R.C.C.S Neuromed, Via Atinense, 18, 86077 Pozzilli IS, Italy; (M.A.O.); (S.S.); (S.C.); (F.G.)
- Correspondence: ; Tel.: +39-0865-915220
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20
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Mollazadeh H, Mohtashami E, Mousavi SH, Soukhtanloo M, Vahedi MM, Hosseini A, Afshari AR, Sahebkar A. Deciphering the Role of Glutamate Signaling in Glioblastoma Multiforme: Current Therapeutic Modalities and Future Directions. Curr Pharm Des 2020; 26:4777-4788. [DOI: 10.2174/1381612826666200603132456] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 05/06/2020] [Indexed: 12/19/2022]
Abstract
As the most popular intrinsic neoplasm throughout the brain, glioblastoma multiforme (GBM) is resistant
to existing therapies. Due to its invasive nature, GBM shows a poor prognosis despite aggressive surgery
and chemoradiation. Therefore, identifying and understanding the critical molecules of GBM can help develop
new therapeutic strategies. Glutamatergic signaling dysfunction has been well documented in neurodegenerative
diseases as well as in GBM. Inhibition of glutamate receptor activation or extracellular glutamate release by specific
antagonists inhibits cell development, invasion, and migration and contributes to apoptosis and autophagy in
GBM cells. This review outlines the current knowledge of glutamate signaling involvement and current therapeutic
modalities for the treatment of GBM.
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Affiliation(s)
- Hamid Mollazadeh
- Department of Physiology and Pharmacology, Faculty of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Elmira Mohtashami
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed H. Mousavi
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Soukhtanloo
- Department of Medical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad M. Vahedi
- Department of Pharmacology, Faculty of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Azar Hosseini
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir R. Afshari
- Department of Physiology and Pharmacology, Faculty of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
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21
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Nguyen T, Kirsch BJ, Asaka R, Nabi K, Quinones A, Tan J, Antonio MJ, Camelo F, Li T, Nguyen S, Hoang G, Nguyen K, Udupa S, Sazeides C, Shen YA, Elgogary A, Reyes J, Zhao L, Kleensang A, Chaichana KL, Hartung T, Betenbaugh MJ, Marie SK, Jung JG, Wang TL, Gabrielson E, Le A. Uncovering the Role of N-Acetyl-Aspartyl-Glutamate as a Glutamate Reservoir in Cancer. Cell Rep 2020; 27:491-501.e6. [PMID: 30970252 PMCID: PMC6472703 DOI: 10.1016/j.celrep.2019.03.036] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 02/14/2019] [Accepted: 03/08/2019] [Indexed: 11/13/2022] Open
Abstract
N-acetyl-aspartyl-glutamate (NAAG) is a peptide-based neurotransmitter that has been extensively studied in many neurological diseases. In this study, we show a specific role of NAAG in cancer. We found that NAAG is more abundant in higher grade cancers and is a source of glutamate in cancers expressing glutamate carboxypeptidase II (GCPII), the enzyme that hydrolyzes NAAG to glutamate and N-acetyl-aspartate (NAA). Knocking down GCPII expression through genetic alteration or pharmacological inhibition of GCPII results in a reduction of both glutamate concentrations and cancer growth. Moreover, targeting GCPII in combination with glutaminase inhibition accentuates these effects. These findings suggest that NAAG serves as an important reservoir to provide glutamate to cancer cells through GCPII when glutamate production from other sources is limited. Thus, GCPII is a viable target for cancer therapy, either alone or in combination with glutaminase inhibition. Nguyen et al. show that NAAG is more abundant in higher grade cancers and a source of glutamate in cancers expressing GCPII, the enzyme that hydrolyzes NAAG to glutamate and NAA. The results suggest that GCPII is a viable target for cancer therapy, either alone or in combination with glutaminase inhibition.
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Affiliation(s)
- Tu Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Brian James Kirsch
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD 21218, USA
| | - Ryoichi Asaka
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Karim Nabi
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Addison Quinones
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Jessica Tan
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | | | - Felipe Camelo
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Ting Li
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Stephanie Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Giang Hoang
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Kiet Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Sunag Udupa
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Christos Sazeides
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Yao-An Shen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Amira Elgogary
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Juvenal Reyes
- Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Liang Zhao
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Andre Kleensang
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Kaisorn Lee Chaichana
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Thomas Hartung
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA; University of Konstanz, 78464 Konstanz, Germany
| | - Michael J Betenbaugh
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD 21218, USA
| | - Suely K Marie
- Department of Neurology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Jin G Jung
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Tian-Li Wang
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Edward Gabrielson
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Anne Le
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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22
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Yi H, Talmon G, Wang J. Glutamate in cancers: from metabolism to signaling. J Biomed Res 2019; 34:260-270. [PMID: 32594024 PMCID: PMC7386414 DOI: 10.7555/jbr.34.20190037] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 08/20/2019] [Indexed: 01/31/2023] Open
Abstract
Glutamine and glutamate are major bioenergy substrates for normal and cancer cell growth. Cancer cells need more biofuel than normal tissues for energy supply, anti-oxidation activity and biomass production. Genes related to metabolic chains in many cancers are somehow mutated, which makes cancer cells more glutamate dependent. Meanwhile, glutamate is an excitatory neurotransmitter for conducting signals through binding with different types of receptors in central neuron system. Interestingly, increasing evidences have shown involvement of glutamate signaling, guided through their receptors, in human malignancy. Dysregulation of glutamate transporters, such as excitatory amino acid transporter and cystine/glutamate antiporter system, also generates excessive extracellular glutamate, which in turn, activates glutamate receptors on cancer cells and results in malignant growth. These features make glutamate an attractive target for anti-cancer drug development with some glutamate targeted but blood brain barrier impermeable anti-psychosis drugs under consideration. We discussed the relevant progressions and drawbacks in this field herein.
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Affiliation(s)
- Haowei Yi
- Department of Genetics, Cell Biology and Anatomy
| | | | - Jing Wang
- Department of Genetics, Cell Biology and Anatomy
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
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23
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Corsi L, Mescola A, Alessandrini A. Glutamate Receptors and Glioblastoma Multiforme: An Old "Route" for New Perspectives. Int J Mol Sci 2019; 20:ijms20071796. [PMID: 30978987 PMCID: PMC6479730 DOI: 10.3390/ijms20071796] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/05/2019] [Accepted: 04/09/2019] [Indexed: 12/27/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most aggressive malignant tumor of the central nervous system, with poor survival in both treated and untreated patients. Recent studies began to explain the molecular pathway, comprising the dynamic structural and mechanical changes involved in GBM. In this context, some studies showed that the human glioblastoma cells release high levels of glutamate, which regulates the proliferation and survival of neuronal progenitor cells. Considering that cancer cells possess properties in common with neural progenitor cells, it is likely that the functions of glutamate receptors may affect the growth of cancer cells and, therefore, open the road to new and more targeted therapies.
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Affiliation(s)
- Lorenzo Corsi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via G. Campi 287, 41125 Modena, Italy.
| | - Andrea Mescola
- CNR-Nanoscience Institute-S3, Via Campi 213/A, 41125 Modena, Italy.
| | - Andrea Alessandrini
- CNR-Nanoscience Institute-S3, Via Campi 213/A, 41125 Modena, Italy.
- Department of Physics, Informatics e Mathematics, Via G. Campi 213/a, 41125 Modena, Italy.
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24
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Arcella A, Oliva MA, Staffieri S, Sanchez M, Madonna M, Riozzi B, Esposito V, Giangaspero F, Frati L. Effects of aloe emodin on U87MG glioblastoma cell growth: In vitro and in vivo study. ENVIRONMENTAL TOXICOLOGY 2018; 33:1160-1167. [PMID: 30218594 DOI: 10.1002/tox.22622] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 06/14/2018] [Accepted: 06/17/2018] [Indexed: 05/23/2023]
Abstract
Glioblastoma, the most aggressive and malignant form of glioma, appears to be resistant to various chemotherapeutic agents. Hence other approaches have been investigated to target more pathways involved in glioblastoma development and progression. Here we investigate the anticancer effect of Aloe-Emodin (AE), an anthraquinone compound presents in the leaves of Aloe arborescens, on human glioblastoma cell line U87MG. U87MG were treated with various concentrations of AE (20 and 40 μM) for different times (24, 48, and 72 hr). Cell growth was monitored by daily cell count after treatments. Growth analysis showed that AE significantly decrease proliferation of U87MG in a time and dose dependent manner. FACS analysis demonstrates a block of cell cycle in S and G2/M phase. AE probably induced also apoptosis by releasing of apoptosis-inducing factor: PARP and Lamin activation leading to nuclear shrinkage. In addition, exposure of U87MG to AE reduced pAKT phosphorylation. AE inhibition of U87MG growth is a result of more mechanism together. Here we report that AE has a specific growth inhibition on U87MG also in in vivo. The growth of U87MG, subcutaneously injected in nude mice with severe combined immunodeficiency, is inhibited without any appreciable toxic effects on the animals after AE treatment. AE might represent a conceptually new lead antitumor adjuvant drug.
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Affiliation(s)
| | | | | | | | | | | | - Vincenzo Esposito
- IRCCS NEUROMED, Pozzilli, Italy
- University of Rome "Sapienza", Rome, Italy
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25
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Jantas D, Grygier B, Gołda S, Chwastek J, Zatorska J, Tertil M. An endogenous and ectopic expression of metabotropic glutamate receptor 8 (mGluR8) inhibits proliferation and increases chemosensitivity of human neuroblastoma and glioma cells. Cancer Lett 2018; 432:1-16. [DOI: 10.1016/j.canlet.2018.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/06/2018] [Accepted: 06/03/2018] [Indexed: 12/11/2022]
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26
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Wu F, Zhao Z, Chai R, Liu Y, Wang K, Wang Z, Li G, Huang R, Jiang H, Zhang K. Expression profile analysis of antisense long non-coding RNA identifies WDFY3-AS2 as a prognostic biomarker in diffuse glioma. Cancer Cell Int 2018; 18:107. [PMID: 30069164 PMCID: PMC6064140 DOI: 10.1186/s12935-018-0603-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 07/25/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Increasing evidence has shown that long non-coding RNAs (lncRNAs) are important prognostic biomarkers and epigenetic regulators with critical roles in cancer initiation and progression. However, the expression and clinical prognostic value of antisense lncRNAs in diffuse glioma patients remain unknown. METHODS Here, we profiled differentially expressed antisense lncRNAs in glioma using RNA sequencing data from Chinese Glioma Genome Atlas database. Cox regression was performed to evaluate the prognostic value. Gene oncology (GO) and gene set enrichment analysis (GSEA) were used for functional analysis of antisense LncRNAs. RESULTS Expression profiling identified 169 aberrantly expressed antisense lncRNAs between lower grade glioma (LGG) (grade II and III) and glioblastoma multiforme (GBM), 113 antisense lncRNAs between LGG IDH-wt and IDH-mut samples, and 70 antisense lncRNAs between GBM IDH-wt and IDH-mut samples, respectively. Among them, three antisense lncRNAs (WDFY3-AS2, MCM3AP-AS1 and LBX2-AS1) were significantly associated with prognosis and malignant progression of patients. WDFY3-AS2, the top one of downregulated antisense lncRNAs in GBM with fold change of 0.441 (P < 0.001), showed specific decreased expression in classical, mesenchymal, LGG IDH-wt, GBM IDH-wt or MGMT promoter unmethylated stratified patients. Chi square test found that WDFY3-AS2 was significantly associated with the clinical and molecular features of glioma. Univariate and multivariate Cox regression analysis indicated that WDFY3-AS2 was independently correlated with overall survival (OS) of patients. Kaplan-Meier analysis found that patients with high WDFY3-AS2 expression had longer OS than the low expression ones in the stratified cohorts. Additionally, GO and GSEA showed that gene sets correlated with WDFY3-AS2 expression were involved in regulation of synaptic transmission, glutamate receptor and TNF signaling pathway. CONCLUSION Our findings provided convincing evidence that WDFY3-AS2 is a novel valuable prognostic biomarker for diffuse glioma.
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Affiliation(s)
- Fan Wu
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
- No. 6, Tiantan Xili, Dongcheng District, Beijing, 100050 China
| | - Zheng Zhao
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Ruichao Chai
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Yuqing Liu
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Kuanyu Wang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Zhiliang Wang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Guanzhang Li
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Ruoyu Huang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Haoyu Jiang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Kenan Zhang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
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27
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Dalley CB, Wroblewska B, Wolfe BB, Wroblewski JT. The Role of Metabotropic Glutamate Receptor 1 Dependent Signaling in Glioma Viability. J Pharmacol Exp Ther 2018; 367:59-70. [PMID: 30054311 DOI: 10.1124/jpet.118.250159] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 07/18/2018] [Indexed: 12/31/2022] Open
Abstract
Glioma refers to malignant central nervous system tumors that have histologic characteristics in common with glial cells. The most prevalent type, glioblastoma multiforme, is associated with a poor prognosis and few treatment options. On the basis of reports of aberrant expression of mGluR1 mRNA in glioma, evidence that melanoma growth is directly influenced by glutamate metabotropic receptor 1 (mGluR1), and characterization of β-arrestin-dependent prosurvival signaling by this receptor, this study investigated the hypothesis that glioma cell lines aberrantly express mGluR1 and depend on mGluR1-mediated signaling to maintain viability and proliferation. Three glioma cell lines (Hs683, A172, and U87) were tested to confirm mGluR1 mRNA expression and the dependence of glioma cell viability on glutamate. Pharmacologic and genetic evidence is presented that suggests mGluR1 signaling specifically supports glioma proliferation and viability. For example, selective noncompetitive antagonists of mGluR1, CPCCOEt and JNJ16259685, decreased the viability of these cells in a dose-dependent manner, and glutamate metabotropic receptor 1 gene silencing significantly reduced glioma cell proliferation. Also, results of an anchorage-independent growth assay suggested that noncompetitive antagonism of mGluR1 may decrease the tumorigenic potential of Hs683 glioma cells. Finally, data are provided that support the hypothesis that a β-arrestin-dependent signaling cascade may be involved in glutamate-stimulated viability in glioma cells and that ligand bias may exist at mGluR1 expressed in these cells. Taken together, the results strongly suggest that mGluR1 may act as a proto-oncogene in glioma and be a viable drug target in glioma treatment.
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Affiliation(s)
- Carrie Bowman Dalley
- The Wroblewski Laboratory, Department of Pharmacology and Physiology (C.B.D., B.W., B.B.W., J.T.W.) and School of Nursing and Health Studies (C.B.D.), Georgetown University Medical Center, Washington, District of Columbia
| | - Barbara Wroblewska
- The Wroblewski Laboratory, Department of Pharmacology and Physiology (C.B.D., B.W., B.B.W., J.T.W.) and School of Nursing and Health Studies (C.B.D.), Georgetown University Medical Center, Washington, District of Columbia
| | - Barry B Wolfe
- The Wroblewski Laboratory, Department of Pharmacology and Physiology (C.B.D., B.W., B.B.W., J.T.W.) and School of Nursing and Health Studies (C.B.D.), Georgetown University Medical Center, Washington, District of Columbia
| | - Jarda T Wroblewski
- The Wroblewski Laboratory, Department of Pharmacology and Physiology (C.B.D., B.W., B.B.W., J.T.W.) and School of Nursing and Health Studies (C.B.D.), Georgetown University Medical Center, Washington, District of Columbia
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28
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Jantas D, Grygier B, Zatorska J, Lasoń W. Allosteric and Orthosteric Activators of mGluR8 Differentially Affect the Chemotherapeutic-Induced Human Neuroblastoma SH-SY5Y Cell Damage: The Impact of Cell Differentiation State. Basic Clin Pharmacol Toxicol 2018; 123:443-451. [PMID: 29753314 DOI: 10.1111/bcpt.13041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 04/29/2018] [Indexed: 12/25/2022]
Abstract
The participation of group III metabotropic glutamate receptors (mGluRs) in cancer growth and progression is still an understudied issue. Based on our recent data on high expression of mGluR8 in human neuroblastoma SH-SY5Y cells, in this study, we evaluated the effect of an mGluR8-specific positive allosteric modulator (PAM: AZ12216052) and orthosteric agonist [(S)-3,4-DCPG ((S)-3,4-dicarboxyphenylglycine)] on chemotherapeutic (doxorubicin, irinotecan or cisplatin)-evoked cell damage in undifferentiated (UN-) and retinoic acid-differentiated (RA-) SH-SY5Y cells. The data showed that AZ12216052 as well as a group III mGluR antagonist (UBP1112) but not (S)-3,4-DCPG partially inhibited the cell damage evoked by doxorubicin, irinotecan or cisplatin in UN-SH-SY5Y cells. In RA-SH-SY5Y, we observed only a modest protective effect of mGluR8 PAM. In contrast, both types of mGluR8 activators significantly enhanced toxic effects of doxorubicin and irinotecan in RA-SH-SY5Y cells. These data suggest that in undifferentiated neuroblastoma malignant cells, some mGluR8 modulators can decrease cytotoxic effects of chemotherapeutics which exclude them from the group of putative anticancer agents. On the other hand, in SH-SY5Y cells differentiated to a more mature neuron-like phenotype, that is non-malignant cells, the mGluR8 activators can aggravate the chemotherapeutic neurotoxicity which is a well-known undesired effect of these drugs. Our pharmacological data add new observations to the unexplored field of research on the role of mGluR8 in cancer, pointing to complexity of response which could be mediated by particular types of mGluR8 ligands at least in neuroblastoma cells.
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Affiliation(s)
- Danuta Jantas
- Department of Experimental Neuroendocrinology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Beata Grygier
- Department of Experimental Neuroendocrinology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Justyna Zatorska
- Department of Experimental Neuroendocrinology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Władysław Lasoń
- Department of Experimental Neuroendocrinology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
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29
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Hombach-Klonisch S, Mehrpour M, Shojaei S, Harlos C, Pitz M, Hamai A, Siemianowicz K, Likus W, Wiechec E, Toyota BD, Hoshyar R, Seyfoori A, Sepehri Z, Ande SR, Khadem F, Akbari M, Gorman AM, Samali A, Klonisch T, Ghavami S. Glioblastoma and chemoresistance to alkylating agents: Involvement of apoptosis, autophagy, and unfolded protein response. Pharmacol Ther 2018; 184:13-41. [DOI: 10.1016/j.pharmthera.2017.10.017] [Citation(s) in RCA: 192] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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30
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Iacovelli L, Orlando R, Rossi A, Spinsanti P, Melchiorri D, Nicoletti F. Targeting metabotropic glutamate receptors in the treatment of primary brain tumors. Curr Opin Pharmacol 2018. [PMID: 29525720 DOI: 10.1016/j.coph.2018.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In spite of the recent advancement in the molecular characterization of malignant gliomas and medulloblastomas, the treatment of primary brain tumors remains suboptimal. The use of small molecule inhibitors of intracellular signaling pathways, inhibitors of angiogenesis, and immunotherapic agents is limited by systemic adverse effects, limited brain penetration, and, in some cases, lack of efficacy. Thus, adjuvant chemo-therapy and radiotherapy still remain the gold standard in the treatment of grade-IV astrocytoma (glioblastoma multiforme) and medulloblastoma. We review evidence that supports the development of mGlu3 receptor antagonists as add-on drugs in the treatment of malignant gliomas. These drugs appear to display pleiotropic effect on tumor cells, affecting proliferation, differentiation, and response to chemotherapy. mGlu1 and mGlu4 receptors could also be targeted by potential anticancer agents in the treatment of malignant gliomas and medulloblastoma, but extensive research is required for target validation.
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Affiliation(s)
- Luisa Iacovelli
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Italy.
| | - Rosamaria Orlando
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Italy
| | - Alessandro Rossi
- Faculty of Medicine and Psychology, Sapienza University of Rome, Italy
| | - Paola Spinsanti
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Italy
| | - Daniela Melchiorri
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Italy
| | - Ferdinando Nicoletti
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome, Italy; IRCCS Neuromed, Pozzilli, Italy
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31
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Dornier E, Rabas N, Mitchell L, Novo D, Dhayade S, Marco S, Mackay G, Sumpton D, Pallares M, Nixon C, Blyth K, Macpherson IR, Rainero E, Norman JC. Glutaminolysis drives membrane trafficking to promote invasiveness of breast cancer cells. Nat Commun 2017; 8:2255. [PMID: 29269878 PMCID: PMC5740148 DOI: 10.1038/s41467-017-02101-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 11/06/2017] [Indexed: 01/31/2023] Open
Abstract
The role of glutaminolysis in providing metabolites to support tumour growth is well-established, but the involvement of glutamine metabolism in invasive processes is yet to be elucidated. Here we show that normal mammary epithelial cells consume glutamine, but do not secrete glutamate. Indeed, low levels of extracellular glutamate are necessary to maintain epithelial homoeostasis, and provision of glutamate drives disruption of epithelial morphology and promotes key characteristics of the invasive phenotype such as lumen-filling and basement membrane disruption. By contrast, primary cultures of invasive breast cancer cells convert glutamine to glutamate which is released from the cell through the system Xc- antiporter to activate a metabotropic glutamate receptor. This contributes to the intrinsic aggressiveness of these cells by upregulating Rab27-dependent recycling of the transmembrane matrix metalloprotease, MT1-MMP to promote invasive behaviour leading to basement membrane disruption. These data indicate that acquisition of the ability to release glutamate is a key watershed in disease aggressiveness.
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Affiliation(s)
- Emmanuel Dornier
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Nicolas Rabas
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Louise Mitchell
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - David Novo
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Sandeep Dhayade
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Sergi Marco
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Gillian Mackay
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - David Sumpton
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Maria Pallares
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Colin Nixon
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Karen Blyth
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
| | - Iain R Macpherson
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1QH, UK
| | - Elena Rainero
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK.
- Biomedical Science Department, The University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
| | - Jim C Norman
- CRUK Beatson Institute for Cancer Research, Garscube Estate, Glasgow, G61 1BD, UK.
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
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p73 promotes glioblastoma cell invasion by directly activating POSTN (periostin) expression. Oncotarget 2017; 7:11785-802. [PMID: 26930720 PMCID: PMC4914248 DOI: 10.18632/oncotarget.7600] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 01/18/2016] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma Multiforme is one of the most highly metastatic cancers and constitutes 70% of all gliomas. Despite aggressive treatments these tumours have an exceptionally bad prognosis, mainly due to therapy resistance and tumour recurrence. Here we show that the transcription factor p73 confers an invasive phenotype by directly activating expression of POSTN (periostin, HGNC:16953) in glioblastoma cells. Knock down of endogenous p73 reduces invasiveness and chemo-resistance, and promotes differentiation in vitro. Using chromatin immunoprecipitation and reporter assays we demonstrate that POSTN, an integrin binding protein that has recently been shown to play a major role in metastasis, is a transcriptional target of TAp73. We further show that POSTN overexpression is sufficient to rescue the invasive phenotype of glioblastoma cells after p73 knock down. Additionally, bioinformatics analysis revealed that an intact p73/POSTN axis, where POSTN and p73 expression is correlated, predicts bad prognosis in several cancer types. Taken together, our results support a novel role of TAp73 in controlling glioblastoma cell invasion by regulating the expression of the matricellular protein POSTN.
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Atzori MG, Tentori L, Ruffini F, Ceci C, Lisi L, Bonanno E, Scimeca M, Eskilsson E, Daubon T, Miletic H, Ricci Vitiani L, Pallini R, Navarra P, Bjerkvig R, D'Atri S, Lacal PM, Graziani G. The anti-vascular endothelial growth factor receptor-1 monoclonal antibody D16F7 inhibits invasiveness of human glioblastoma and glioblastoma stem cells. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2017; 36:106. [PMID: 28797294 PMCID: PMC5553938 DOI: 10.1186/s13046-017-0577-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 08/02/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Glioblastoma (GBM) is a highly migratory, invasive, and angiogenic brain tumor. Like vascular endothelial growth factor-A (VEGF-A), placental growth factor (PlGF) promotes GBM angiogenesis. VEGF-A is a ligand for both VEGF receptor-1 (VEGFR-1) and VEGFR-2, while PlGF interacts exclusively with VEGFR-1. We recently generated the novel anti-VEGFR-1 monoclonal antibody (mAb) D16F7 that diminishes VEGFR-1 homodimerization/activation without affecting VEGF-A and PlGF binding. METHODS In the present study, we evaluated the expression of VEGFR-1 in human GBM tissue samples (n = 42) by immunohistochemistry, in cell lines (n = 6) and GBM stem cells (GSCs) (n = 18) by qRT-PCR and/or western blot analysis. In VEGFR-1 positive GBM or GSCs we also analyzed the ability of D16F7 to inhibit GBM invasiveness in response to VEGF-A and PlGF. RESULTS Most of GBM specimens stained positively for VEGFR-1 and all but one GBM cell lines expressed VEGFR-1. On the other hand, in GSCs the expression of the receptor was heterogeneous. D16F7 reduced migration and invasion of VEGFR-1 positive GBM cell lines and patient-derived GSCs in response to VEGF-A and PlGF. Interestingly, this effect was also observed in VEGFR-1 positive GSCs transfected to over-express wild-type EGFR (EGFRwt+) or mutant EGFR (ligand binding domain-deficient EGFRvIII+). Furthermore, D16F7 suppressed intracellular signal transduction in VEGFR-1 over-expressing GBM cells by reducing receptor auto-phosphorylation at tyrosine 1213 and downstream Erk1/2 activation induced by receptor ligands. CONCLUSION The results from this study suggest that VEGFR-1 is a relevant target for GBM therapy and that D16F7-derived humanized mAbs warrant further investigation.
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Affiliation(s)
- Maria Grazia Atzori
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133, Rome, Italy
| | - Lucio Tentori
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133, Rome, Italy
| | - Federica Ruffini
- Laboratory of Molecular Oncology, "Istituto Dermopatico dell'Immacolata"-IRCCS, Via dei Monti di Creta, 104, 00167, Rome, Italy
| | - Claudia Ceci
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133, Rome, Italy
| | - Lucia Lisi
- Istituto di Farmacologia, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Roma, Italia
| | - Elena Bonanno
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy
| | - Manuel Scimeca
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy
| | - Eskil Eskilsson
- Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Thomas Daubon
- INSERM U1029, University of Bordeaux, Pessac, France.,Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Hrvoje Miletic
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Lucia Ricci Vitiani
- Department of Hematology, Oncology and Molecular Medicine, "Istituto Superiore di Sanità" (ISS), Rome, Italy
| | - Roberto Pallini
- Department of Neurosurgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Pierluigi Navarra
- Istituto di Farmacologia, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Roma, Italia.,UOC di Farmacologia, Fondazione Policlinico Universitario Agostino Gemelli, Largo Francesco Vito 1, 00168, Roma, Italia
| | - Rolf Bjerkvig
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Stefania D'Atri
- Laboratory of Molecular Oncology, "Istituto Dermopatico dell'Immacolata"-IRCCS, Via dei Monti di Creta, 104, 00167, Rome, Italy
| | - Pedro Miguel Lacal
- Laboratory of Molecular Oncology, "Istituto Dermopatico dell'Immacolata"-IRCCS, Via dei Monti di Creta, 104, 00167, Rome, Italy.
| | - Grazia Graziani
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133, Rome, Italy.
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Yu M, Xue Y, Zheng J, Liu X, Yu H, Liu L, Li Z, Liu Y. Linc00152 promotes malignant progression of glioma stem cells by regulating miR-103a-3p/FEZF1/CDC25A pathway. Mol Cancer 2017; 16:110. [PMID: 28651608 PMCID: PMC5485714 DOI: 10.1186/s12943-017-0677-9] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 06/07/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Glioma is one of the most frequent intracranial malignant tumors. LncRNAs have been identified as new modulators in the origination and progression of glioma. METHODS Quantitative real-time PCR were conducted to evaluate the expression of linc00152 and miRNA-103a-3p in glioma tissues and cells. Western blot were used to determine the expression of FEZF1 and CDC25A in glioma tissues and cells. Stable knockdown of linc00152 or over-expression of miR-103a-3p in glioma stem cells (GSCs) were established to explore the function of linc00152 and miR-103a-3p in GSCs. Further, luciferase reports were used to investigate the correlation between linc00152 and miR-103a-3p. Cell Counting Kit-8, transwell assays, and flow cytometry were used to investigate the function of linc00152 and miR-103a-3p in GSC malignant biological behaviors. ChIP assays were employed to ascertain the correlations between FEZF1 and CDC25A. RESULTS Linc00152 was up-regulated in glioma tissues as well as in GSCs. Knockdown of linc00152 inhibited cell proliferation, migration and invasion, while promoted GSC apoptosis. Linc00152 regulated the malignant behavior of GSCs by binding to miR-103a-3p, which functions as a tumor suppressor. In addition, knockdown of linc00152 down-regulated forebrain embryonic zinc finger protein 1 (FEZF1), a direct target of miR-103a-3p which played an oncogenic role in GSCs. FEZF1 elevated promoter activities and up-regulated expression of the oncogenic gene cell division cycle 25A (CDC25A). CDC25A over-expression activated the PI3K/AKT pathways, which regulated the malignant behavior of GSCs. CONCLUSIONS Linc00152/miR-103a-3p/FEZF1/CDC25A axis plays a novel role in regulating the malignant behavior of GSCs, which may be a new potential therapeutic strategy for glioma therapy.
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Affiliation(s)
- Mingjun Yu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
- Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, 110004, People's Republic of China
- Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, 110004, People's Republic of China
| | - Yixue Xue
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, 110122, People's Republic of China
- Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, 110122, People's Republic of China
- Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, 110122, People's Republic of China
| | - Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
- Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, 110004, People's Republic of China
- Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, 110004, People's Republic of China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
- Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, 110004, People's Republic of China
- Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, 110004, People's Republic of China
| | - Hai Yu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
- Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, 110004, People's Republic of China
- Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, 110004, People's Republic of China
| | - Libo Liu
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, 110122, People's Republic of China
- Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, 110122, People's Republic of China
- Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, 110122, People's Republic of China
| | - Zhen Li
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
- Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, 110004, People's Republic of China
- Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, 110004, People's Republic of China
| | - Yunhui Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China.
- Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, 110004, People's Republic of China.
- Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, 110004, People's Republic of China.
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Pereira MSL, Klamt F, Thomé CC, Worm PV, de Oliveira DL. Metabotropic glutamate receptors as a new therapeutic target for malignant gliomas. Oncotarget 2017; 8:22279-22298. [PMID: 28212543 PMCID: PMC5400663 DOI: 10.18632/oncotarget.15299] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 01/03/2017] [Indexed: 12/21/2022] Open
Abstract
Metabotropic glutamate receptors (mGluR) are predominantly involved in maintenance of cellular homeostasis of central nervous system. However, evidences have suggested other roles of mGluR in human tumors. Aberrant mGluR signaling has been shown to participate in transformation and maintenance of various cancer types, including malignant brain tumors. This review intends to summarize recent findings regarding the involvement of mGluR-mediated intracellular signaling pathways in progression, aggressiveness, and recurrence of malignant gliomas, mainly glioblastomas (GBM), highlighting the potential therapeutic applications of mGluR ligands. In addition to the growing number of studies reporting mGluR gene or protein expression in glioma samples (resections, lineages, and primary cultures), pharmacological blockade in vitro of mGluR1 and mGluR3 by selective ligands has been shown to be anti-proliferative and anti-migratory, decreasing activation of MAPK and PI3K pathways. In addition, mGluR3 antagonists promoted astroglial differentiation of GBM cells and also enabled cytotoxic action of temozolomide (TMZ). mGluR3-dependent TMZ toxicity was supported by increasing levels of MGMT transcripts through an intracellular signaling pathway that sequentially involves PI3K and NF-κB. Further, continuous pharmacological blockade of mGluR1 and mGluR3 have been shown to reduced growth of GBM tumor in two independent in vivo xenograft models. In parallel, low levels of mGluR3 mRNA in GBM resections may be a predictor for long survival rate of patients. Since several Phase I, II and III clinical trials are being performed using group I and II mGluR modulators, there is a strong scientifically-based rationale for testing mGluR antagonists as an adjuvant therapy for malignant brain tumors.
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Affiliation(s)
- Mery Stefani Leivas Pereira
- Department of Biochemistry, Laboratory of Cellular Neurochemistry, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre RS, Brazil
| | - Fábio Klamt
- Department of Biochemistry, Laboratory of Cellular Biochemistry, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre RS, Brazil
| | - Chairini Cássia Thomé
- Department of Biochemistry, Laboratory of Cellular Neurochemistry, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre RS, Brazil
| | - Paulo Valdeci Worm
- Department of Neurosurgery, Cristo Redentor Hospital - GHC - Porto Alegre RS, Brazil.,Department of Neurosurgery, São José Hospital, Complexo Hospitalar Santa Casa, Porto Alegre RS, Brazil
| | - Diogo Losch de Oliveira
- Department of Biochemistry, Laboratory of Cellular Neurochemistry, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre RS, Brazil
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36
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Eyüpoglu IY, Savaskan NE. Epigenetics in Brain Tumors: HDACs Take Center Stage. Curr Neuropharmacol 2016; 14:48-54. [PMID: 26521944 PMCID: PMC4787285 DOI: 10.2174/1570159x13666151030162457] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/22/2015] [Accepted: 10/12/2015] [Indexed: 12/14/2022] Open
Abstract
Primary tumors of the brain account for 2 % of all cancers with malignant gliomas taking the lion’s share at 70 %. Malignant gliomas (high grade gliomas WHO° III and °IV) belong to one of the most threatening tumor entities known for their disappointingly short median survival time of just 14 months despite maximum therapy according to current gold standards. Malignant gliomas manifest various factors, through which they adapt and manipulate the tumor microenvironment to their advantage. Epigenetic mechanisms operate on the tumor microenvironment by de- and methylation processes and imbalances between the histone deacetylases (HDAC) and histone acetylases (HAT). Many compounds have been discovered modulating epigenetically controlled signals. Recent studies indicate that xCT (system xc-, SLC7a11) and CD44 (H-CAM, ECM-III, HUTCH-1) functions as a bridge between these epigenetic regulatory mechanisms and malignant glioma progression. The question that ensues is the extent to which therapeutic intervention on these signaling pathways would exert influence on the treatment of malignant gliomas as well as the extent to which manipulation of HDAC activity can sensitize tumor cells for chemotherapeutics through ‘epigenetic priming’. In light of considering the current stagnation in the development of therapeutic options, the need for new strategies in the treatment of gliomas has never been so pressing. In this context the possibility of pharmacological intervention on tumor-associated genes by epigenetic priming opens a novel path in the treatment of primary brain tumors.
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Affiliation(s)
- Ilker Y Eyüpoglu
- Department of Neurosurgery, Universitätsklinikum Erlangen, University of Erlangen- Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany.
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37
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Schimanski A, Ebbert L, Sabel MC, Finocchiaro G, Lamszus K, Ewelt C, Etminan N, Fischer JC, Sorg RV. Human glioblastoma stem-like cells accumulate protoporphyrin IX when subjected to exogenous 5-aminolaevulinic acid, rendering them sensitive to photodynamic treatment. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 163:203-10. [DOI: 10.1016/j.jphotobiol.2016.08.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 08/25/2016] [Indexed: 01/01/2023]
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38
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Temozolomide low-dose chemotherapy in newly diagnosed low-grade gliomas: activity, safety, and long-term follow-up. TUMORI JOURNAL 2016; 103:255-260. [PMID: 27716874 DOI: 10.5301/tj.5000565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2016] [Indexed: 01/31/2023]
Abstract
PURPOSE To explore the efficacy and toxicity of an extended schedule of temozolomide (50 mg/mq 1 week on/1 week off) in a population of newly diagnosed low-grade gliomas (LGG). METHODS Primary endpoints were progression-free survival (PFS) at 12 and 24 months and response rate evaluated with Response Assessment in Neuro-Oncology Criteria. Secondary endpoints were clinical benefit (reduction of seizures frequency), reduction of steroid, and modifications of Karnofsky Performance Status. RESULTS From 2006 to 2009, we enrolled 14 consecutive patients with newly diagnosed LGG: 8 grade II astrocytomas, 2 oligodendroglioma, and 4 oligo-astrocytoma. Temozolomide was administered for 18 cycles (mean) per patient (range 3-24 cycles). In 57.5% (n = 8), we observed stable disease, 28.5% (n = 4) presented a minor response, and 14% (n = 2) showed progression. Five patients presented early progression during the first year of treatment and the study was stopped. A relevant clinical benefit was observed in 85% of patients (seizure control). After 6 years of follow-up, only 4 patients died. Prolonged PFS was associated with 1p-19q codeletion over 1p-19q intact (35 vs 4 months; p<0.04) and IDH1 mutation over IDH1 wild-type (36 vs 6 months; p<0.009). CONCLUSIONS The study was interrupted for the high rate of progression observed in the first 14 patients enrolled. However, our results show that an extended low dose of temozolomide presents interesting activity with objective response and clinical benefit, but does not seem to prevent progression in patients presenting unfavorable molecular prognostic factors.
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39
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Gong W, Zheng J, Liu X, Ma J, Liu Y, Xue Y. Knockdown of NEAT1 restrained the malignant progression of glioma stem cells by activating microRNA let-7e. Oncotarget 2016; 7:62208-62223. [PMID: 27556696 PMCID: PMC5308721 DOI: 10.18632/oncotarget.11403] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/09/2016] [Indexed: 01/01/2023] Open
Abstract
Nuclear paraspeckle assembly transcript 1 (NEAT1), a long non-coding RNA, promotes oncogenesis in various tumors, including human gliomas. Herein, we studied the expression and function of NEAT1 in glioma stem cells (GSCs). Quantitative real-time PCR demonstrated that NEAT1 was upregulated in GSCs. NEAT1 knockdown inhibited GSC cell proliferation, migration and invasion and promoted GSC apoptosis. A potential binding region between NEAT1 and microRNA let-7e was confirmed by dual-luciferase assays. Upregulation of NEAT1 reduced the expression of let-7e, and there was reciprocal repression between NEAT1 and let-7e in an Argonaute 2-dependent manner. Let-7e expression was lower expression in glioblastoma tissues and GSCs than in normal brain tissues and cells. Restoration of let-7e suppressed tumor function by inhibiting proliferation, migration and invasion while promoting apoptosis in GSCs. NEAT1 knockdown and let-7e overexpression both reduced NRAS protein expression. NRAS was identified as a direct target of let-7e and promoted oncogenesis in GSCs. As NEAT1 promoted oncogenesis by downregulating let-7e expression, both of these genes could be considered for application in glioma therapy.
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Affiliation(s)
- Wei Gong
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China
- Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110122, People's Republic of China
| | - Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China
- Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China
- Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China
| | - Jun Ma
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China
- Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110122, People's Republic of China
| | - Yunhui Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang 110004, People's Republic of China
- Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang 110004, People's Republic of China
| | - Yixue Xue
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110122, People's Republic of China
- Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110122, People's Republic of China
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40
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Ulasov IV, Shah N, Kaverina NV, Lee H, Lin B, Lieber A, Kadagidze ZG, Yoon JG, Schroeder B, Hothi P, Ghosh D, Baryshnikov AY, Cobbs CS. Tamoxifen improves cytopathic effect of oncolytic adenovirus in primary glioblastoma cells mediated through autophagy. Oncotarget 2016; 6:3977-87. [PMID: 25738357 PMCID: PMC4414167 DOI: 10.18632/oncotarget.2897] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 12/11/2014] [Indexed: 11/25/2022] Open
Abstract
Oncolytic gene therapy using viral vectors may provide an attractive therapeutic option for malignant gliomas. These viral vectors are designed in a way to selectively target tumor cells and spare healthy cells. To determine the translational impact, it is imperative to assess the factors that interfere with the anti-glioma effects of the oncolytic adenoviral vectors. In the current study, we evaluated the efficacy of survivin-driven oncolytic adenoviruses pseudotyping with adenoviral fiber knob belonging to the adenoviral serotype 3, 11 and 35 in their ability to kill glioblastoma (GBM) cells selectively without affecting normal cells. Our results indicate that all recombinant vectors used in the study can effectively target GBM in vitro with high specificity, especially the 3 knob-modified vector. Using intracranial U87 and U251 GBM xenograft models we have also demonstrated that treatment with Conditionally Replicative Adenovirus (CRAd-S-5/3) vectors can effectively regress tumor. However, in several patient-derived GBM cell lines, cells exhibited resistance to the CRAd infection as evident from the diminishing effects of autophagy. To improve therapeutic response, tumor cells were pretreated with tamoxifen. Our preliminary data suggest that tamoxifen sensitizes glioblastoma cells towards oncolytic treatment with CRAd-S-5/3, which may prove useful for GBM in future experimental therapy.
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Affiliation(s)
- Ilya V Ulasov
- Swedish Neuroscience Institute, Seattle, WA, 98122, USA.,Institute of Experimental Diagnostic and Biotherapy, NN. Blokhin Cancer Research Center, RAMN, Moscow, Russia, 115478
| | - Nameeta Shah
- Swedish Neuroscience Institute, Seattle, WA, 98122, USA
| | - Natalya V Kaverina
- NN. Blokhin Cancer Research Center, RAMN, Moscow, Russia, 115478.,Current address: Division of Nephrology, University of Washington, Seattle, 98109, USA
| | - Hwahyang Lee
- Swedish Neuroscience Institute, Seattle, WA, 98122, USA
| | - Biaoyang Lin
- Swedish Neuroscience Institute, Seattle, WA, 98122, USA
| | - Andre Lieber
- University of Washington, Seattle, WA, 98122, USA
| | | | - Jae-Guen Yoon
- Swedish Neuroscience Institute, Seattle, WA, 98122, USA
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Yu LJ, Wall BA, Wangari-Talbot J, Chen S. Metabotropic glutamate receptors in cancer. Neuropharmacology 2016; 115:193-202. [PMID: 26896755 DOI: 10.1016/j.neuropharm.2016.02.011] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 02/07/2016] [Accepted: 02/09/2016] [Indexed: 01/31/2023]
Abstract
Metabotropic glutamate receptors (mGluRs) are widely known for their roles in synaptic signaling. However, accumulating evidence suggests roles of mGluRs in human malignancies in addition to synaptic transmission. Somatic cell homeostasis presents intriguing possibilities of mGluRs and glutamate signaling as novel targets for human cancers. More recently, aberrant glutamate signaling has been shown to participate in the transformation and maintenance of various cancer types, including glioma, melanoma skin cancer, breast cancer, and prostate cancer, indicating that genes encoding mGluRs, GRMs, can function as oncogenes. Here, we provide a review on the interactions of mGluRs and their ligand, glutamate, in processes that promote the growth of tumors of neuronal and non-neuronal origins. Further, we discuss the evolution of riluzole, a glutamate release inhibitor approved for amyotrophic lateral sclerosis (ALS), but now fashioned as an mGluR1 inhibitor for melanoma therapy and as a radio-sensitizer for tumors that have metastasized to the brain. With the success of riluzole, it is not far-fetched to believe that other drugs that may act directly or indirectly on other mGluRs can be beneficial for multiple applications. This article is part of the Special Issue entitled 'Metabotropic Glutamate Receptors, 5 years on'.
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Affiliation(s)
- Lumeng J Yu
- Susan Lehman Cullman Laboratory for Cancer Research, Ernest Mario School of Pharmacy, Rutgers University, NJ, USA
| | - Brian A Wall
- Susan Lehman Cullman Laboratory for Cancer Research, Ernest Mario School of Pharmacy, Rutgers University, NJ, USA; Global Product Safety, Colgate-Palmolive Company, Piscataway, NJ, USA
| | - Janet Wangari-Talbot
- Susan Lehman Cullman Laboratory for Cancer Research, Ernest Mario School of Pharmacy, Rutgers University, NJ, USA
| | - Suzie Chen
- Susan Lehman Cullman Laboratory for Cancer Research, Ernest Mario School of Pharmacy, Rutgers University, NJ, USA; The Cancer Institute of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08903, USA.
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42
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Koekkoek JAF, Dirven L, Heimans JJ, Postma TJ, Vos MJ, Reijneveld JC, Taphoorn MJB. Seizure reduction is a prognostic marker in low-grade glioma patients treated with temozolomide. J Neurooncol 2015; 126:347-54. [PMID: 26547911 PMCID: PMC4718947 DOI: 10.1007/s11060-015-1975-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 10/24/2015] [Indexed: 01/02/2023]
Abstract
We aimed to analyze the value of seizure reduction and radiological response as prognostic markers of survival in patients with low-grade glioma (LGG) treated with temozolomide (TMZ) chemotherapy. We retrospectively reviewed adult patients with a progressive LGG and uncontrolled epilepsy in two hospitals (VUmc Amsterdam; MCH The Hague), who received chemotherapy with TMZ between 2002 and 2014. End points were a ≥50 % seizure reduction and MRI response 6, 12 and 18 months (mo) after the start of TMZ, and their relation with progression-free survival (PFS) and overall survival (OS). We identified 53 patients who met the inclusion criteria. Seizure reduction was an independent prognostic factor for both PFS (HR 0.38; 95 % CI 0.19–0.73; p = 0.004) and OS (HR 0.39; 95 % CI 0.18–0.85; p = 0.018) after 6mo, adjusting for age and histopathological diagnosis, as well as after 12 and 18mo. Patients with an objective radiological response showed a better OS (median 87.5mo; 95 % CI 62.0–112.9) than patients without a response (median 34.4mo; 95 % CI 26.1–42.6; p = 0.046) after 12mo. However, after 6 and 18mo OS was similar in patients with and without a response on MRI. Seizure reduction is an early and consistent prognostic marker for survival after treatment with TMZ, that seems to precede the radiological response. Therefore, seizure reduction may serve as a surrogate marker for tumor response.
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Affiliation(s)
- Johan A F Koekkoek
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands.
- Department of Neurology, Medical Center Haaglanden, The Hague, The Netherlands.
- Department of Neurology, Leiden University Medical Center, PO Box 9600, 2300 RC, Leiden, The Netherlands.
| | - Linda Dirven
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
- Department of Neurology, Leiden University Medical Center, PO Box 9600, 2300 RC, Leiden, The Netherlands
| | - Jan J Heimans
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Tjeerd J Postma
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Maaike J Vos
- Department of Neurology, Medical Center Haaglanden, The Hague, The Netherlands
| | - Jaap C Reijneveld
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Martin J B Taphoorn
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
- Department of Neurology, Medical Center Haaglanden, The Hague, The Netherlands
- Department of Neurology, Leiden University Medical Center, PO Box 9600, 2300 RC, Leiden, The Netherlands
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Engers JL, Rodriguez AL, Konkol LC, Morrison RD, Thompson AD, Byers FW, Blobaum AL, Chang S, Venable DF, Loch MT, Niswender CM, Daniels JS, Jones CK, Conn PJ, Lindsley CW, Emmitte KA. Discovery of a Selective and CNS Penetrant Negative Allosteric Modulator of Metabotropic Glutamate Receptor Subtype 3 with Antidepressant and Anxiolytic Activity in Rodents. J Med Chem 2015; 58:7485-500. [PMID: 26335039 DOI: 10.1021/acs.jmedchem.5b01005] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Previous preclinical work has demonstrated the therapeutic potential of antagonists of the group II metabotropic glutamate receptors (mGlus). Still, compounds that are selective for the individual group II mGlus (mGlu2 and mGlu3) have been scarce. There remains a need for such compounds with the balance of properties suitable for convenient use in a wide array of rodent behavioral studies. We describe here the discovery of a selective mGlu3 NAM 106 (VU0650786) suitable for in vivo work. Compound 106 is a member of a series of 5-aryl-6,7-dihydropyrazolo[1,5-a]pyrazine-4(5H)-one compounds originally identified as a mGlu5 positive allosteric modulator (PAM) chemotype. Its suitability for use in rodent behavioral models has been established by extensive in vivo PK studies, and the behavioral experiments presented here with compound 106 represent the first examples in which an mGlu3 NAM has demonstrated efficacy in models where prior efficacy had previously been noted with nonselective group II antagonists.
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Affiliation(s)
- Julie L Engers
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Alice L Rodriguez
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Leah C Konkol
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Ryan D Morrison
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Analisa D Thompson
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Frank W Byers
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Anna L Blobaum
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Sichen Chang
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Daryl F Venable
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Matthew T Loch
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Colleen M Niswender
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - J Scott Daniels
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Carrie K Jones
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - P Jeffrey Conn
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Craig W Lindsley
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States.,Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37232, United States
| | - Kyle A Emmitte
- Vanderbilt Center for Neuroscience Drug Discovery, Department of Pharmacology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States.,Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37232, United States
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Koekkoek JAF, Dirven L, Heimans JJ, Postma TJ, Vos MJ, Reijneveld JC, Taphoorn MJB. Seizure reduction in a low-grade glioma: more than a beneficial side effect of temozolomide. J Neurol Neurosurg Psychiatry 2015; 86:366-73. [PMID: 25055819 DOI: 10.1136/jnnp-2014-308136] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Seizures are a common symptom in patients with low-grade glioma (LGG), negatively influencing quality of life, if uncontrolled. Besides antiepileptic drugs, antitumour treatment might contribute to a reduction in seizure frequency. The aim of this study was to determine the effect of temozolomide (TMZ) chemotherapy on seizure frequency, to identify factors associated with post-treatment seizure reduction and to analyse the prognostic value of seizure reduction for survival. METHODS We retrospectively reviewed adult patients with supratentorial LGG and epilepsy who received chemotherapy with TMZ as initial treatment or for progressive disease in two hospitals (VUmc Amsterdam; MCH The Hague) between 2002 and 2012. RESULTS We identified 104 patients with LGG with epilepsy who had received TMZ. Uncontrolled epilepsy in the 3 months preceding chemotherapy was present in 66 of 104 (63.5%) patients. A ≥ 50% reduction in seizure frequency after 6 months occurred in 29 of 66 (43.9%) patients. Focal symptoms at presentation (OR 6.55; 95% CI 1.45 to 32.77; p = 0.015) appeared to be positively associated with seizure reduction. Seizure reduction was an independent prognostic factor for progression-free survival (HR 0.32; 95% CI 0.15 to 0.66; p = 0.002) and overall survival (HR 0.33; 95% CI 0.14 to 0.79; p = 0.013), along with a histological diagnosis of oligodendroglioma (HR 0.38; 95% CI 0.17 to 0.86; p = 0.021). Objective responses on MRI were similar for patients with and without seizure reduction. CONCLUSIONS TMZ may contribute to an important reduction in seizure frequency in patients with LGG. Seizure reduction following TMZ treatment has prognostic significance and may serve as an important clinical outcome measure in patients with LGG.
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Affiliation(s)
- Johan A F Koekkoek
- Department of Neurology, VU University Medical Centre, Amsterdam, The Netherlands Department of Neurology, Medical Centre Haaglanden, The Hague, The Netherlands
| | - Linda Dirven
- Department of Neurology, VU University Medical Centre, Amsterdam, The Netherlands
| | - Jan J Heimans
- Department of Neurology, VU University Medical Centre, Amsterdam, The Netherlands
| | - Tjeerd J Postma
- Department of Neurology, VU University Medical Centre, Amsterdam, The Netherlands
| | - Maaike J Vos
- Department of Neurology, Medical Centre Haaglanden, The Hague, The Netherlands
| | - Jaap C Reijneveld
- Department of Neurology, VU University Medical Centre, Amsterdam, The Netherlands
| | - Martin J B Taphoorn
- Department of Neurology, VU University Medical Centre, Amsterdam, The Netherlands Department of Neurology, Medical Centre Haaglanden, The Hague, The Netherlands
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45
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Koekkoek JAF, Kerkhof M, Dirven L, Heimans JJ, Reijneveld JC, Taphoorn MJB. Seizure outcome after radiotherapy and chemotherapy in low-grade glioma patients: a systematic review. Neuro Oncol 2015; 17:924-34. [PMID: 25813469 DOI: 10.1093/neuonc/nov032] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Accepted: 02/11/2015] [Indexed: 11/14/2022] Open
Abstract
There is growing evidence that antitumor treatment contributes to better seizure control in low-grade glioma patients. We performed a systematic review of the current literature on seizure outcome after radiotherapy and chemotherapy and evaluated the association between seizure outcome and radiological response. Twenty-four studies were available, of which 10 described seizure outcome after radiotherapy and 14 after chemotherapy. All studies demonstrated improvements in seizure outcome after antitumor treatment. Eight studies reporting on imaging response in relation to seizure outcome showed a seizure reduction in a substantial part of patients with stable disease on MRI. Seizure reduction may therefore be the only noticeable effect of antitumor treatment. Our findings demonstrate the clinical relevance of monitoring seizure outcome after radiotherapy and chemotherapy, as well as the potential role of seizure reduction as a complementary marker of tumor response in low-grade glioma patients.
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Affiliation(s)
- Johan A F Koekkoek
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands (J.A.F.K., L.D., J.J.H., J.C.R., M.J.B.T.); Department of Neurology, Medical Center Haaglanden, The Hague, Netherlands (J.A.F.K., M.K., M.J.B.T.)
| | - Melissa Kerkhof
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands (J.A.F.K., L.D., J.J.H., J.C.R., M.J.B.T.); Department of Neurology, Medical Center Haaglanden, The Hague, Netherlands (J.A.F.K., M.K., M.J.B.T.)
| | - Linda Dirven
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands (J.A.F.K., L.D., J.J.H., J.C.R., M.J.B.T.); Department of Neurology, Medical Center Haaglanden, The Hague, Netherlands (J.A.F.K., M.K., M.J.B.T.)
| | - Jan J Heimans
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands (J.A.F.K., L.D., J.J.H., J.C.R., M.J.B.T.); Department of Neurology, Medical Center Haaglanden, The Hague, Netherlands (J.A.F.K., M.K., M.J.B.T.)
| | - Jaap C Reijneveld
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands (J.A.F.K., L.D., J.J.H., J.C.R., M.J.B.T.); Department of Neurology, Medical Center Haaglanden, The Hague, Netherlands (J.A.F.K., M.K., M.J.B.T.)
| | - Martin J B Taphoorn
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands (J.A.F.K., L.D., J.J.H., J.C.R., M.J.B.T.); Department of Neurology, Medical Center Haaglanden, The Hague, Netherlands (J.A.F.K., M.K., M.J.B.T.)
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46
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Wolf IML, Fan Z, Rauh M, Seufert S, Hore N, Buchfelder M, Savaskan NE, Eyüpoglu IY. Histone deacetylases inhibition by SAHA/Vorinostat normalizes the glioma microenvironment via xCT equilibration. Sci Rep 2014; 4:6226. [PMID: 25228443 PMCID: PMC4165982 DOI: 10.1038/srep06226] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 08/04/2014] [Indexed: 12/13/2022] Open
Abstract
Malignant gliomas are characterized by neurodegenerative actions leading to the destruction of surrounding brain parenchyma. The disturbance in glutamate homeostasis caused by increased expression of the glutamate transporter xCT plays a key role in glioma progression. We demonstrate that the HDAC-inhibitor SAHA specifically inhibits the xCT-transporter expression. Thereby, tumor cell stress is engendered, marked by increase in ROS. Moreover, SAHA dependent xCT-reduction correlates with the inhibition of ATF4-expression, a factor known to foster xCT expression. Since xCT/system Xc- is pivotal for the brain tumor microenvironment, normalization of this system is a key in the management of malignant gliomas. To date, the problem lay in the inability to specifically target xCT due to the ubiquitous expression of the xCT-transporter—i.e. in non-cancerously transformed cells too—as well as its essential role in physiological CNS processes. Here, we show xCT-transporter equilibration through SAHA is specific for malignant brain tumors whereas SAHA does not affect the physiological xCT levels in healthy brain parenchyma. Our data indicate that SAHA operates on gliomas specifically via normalizing xCT expression which in consequence leads to reduced extracellular glutamate levels. This in turn causes a marked reduction in neuronal cell death and normalized tumor microenvironment.
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Affiliation(s)
- Ines M L Wolf
- 1] Department of Neurosurgery, Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg (FAU) [2]
| | - Zheng Fan
- 1] Department of Neurosurgery, Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg (FAU) [2]
| | - Manfred Rauh
- Department of Pediatrics and Adolescent Medicine, University of Erlangen-Nuremberg
| | | | - Nirjhar Hore
- Department of Neurosurgery, Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg (FAU)
| | - Michael Buchfelder
- Department of Neurosurgery, Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg (FAU)
| | - Nic E Savaskan
- 1] Department of Neurosurgery, Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg (FAU) [2]
| | - Ilker Y Eyüpoglu
- 1] Department of Neurosurgery, Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg (FAU) [2]
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47
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Stem cells and gliomas: past, present, and future. J Neurooncol 2014; 119:547-55. [DOI: 10.1007/s11060-014-1498-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 06/02/2014] [Indexed: 01/14/2023]
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48
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Yang W, Wei J, Guo T, Shen Y, Liu F. Knockdown of miR-210 decreases hypoxic glioma stem cells stemness and radioresistance. Exp Cell Res 2014; 326:22-35. [PMID: 24930954 DOI: 10.1016/j.yexcr.2014.05.022] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/16/2014] [Accepted: 05/26/2014] [Indexed: 02/06/2023]
Abstract
Glioma contains abundant hypoxic regions which provide niches to promote the maintenance and expansion of glioma stem cells (GSCs), which are resistant to conventional therapies and responsible for recurrence. Given the fact that miR-210 plays a vital role in cellular adaption to hypoxia and in stem cell survival and stemness maintenance, strategies correcting the aberrantly expressed miR-210 might open up a new therapeutic avenue to hypoxia GSCs. In the present study, to explore the possibility of miR-210 as an effective therapeutic target to hypoxic GSCs, we employed a lentiviral-mediated anti-sense miR-210 gene transfer technique to knockdown miR-210 expression and analyze phenotypic changes in hypoxic U87s and SHG44s cells. We found that hypoxia led to an increased HIF-2α mRNA expression and miR-210 expression in GSCs. Knockdown of miR-210 decreased neurosphere formation capacity, stem cell marker expression and cell viability, and induced differentiation and G0/G1 arrest in hypoxic GSCs by partially rescued Myc antagonist (MNT) protein expression. Knockdown of MNT could reverse the gene expression changes and the growth inhibition resulting from knockdown of miR-210 in hypoxic GSCs. Moreover, knockdown of miR-210 led to increased apoptotic rate and Caspase-3/7 activity and decreased invasive capacity, reactive oxygen species (ROS) and lactate production and radioresistance in hypoxic GSCs. These findings suggest that miR-210 might be a potential therapeutic target to eliminate GSCs located in hypoxic niches.
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Affiliation(s)
- Wei Yang
- Department of Radiobiology, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, No.199 Renai Road, Suzhou 215123, China.
| | - Jing Wei
- Department of Radiobiology, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, No.199 Renai Road, Suzhou 215123, China
| | - Tiantian Guo
- Department of Radiobiology, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, No.199 Renai Road, Suzhou 215123, China
| | - Yueming Shen
- Department of Radiobiology, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, No.199 Renai Road, Suzhou 215123, China
| | - Fenju Liu
- Department of Radiobiology, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, No.199 Renai Road, Suzhou 215123, China
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BMPs as therapeutic targets and biomarkers in astrocytic glioma. BIOMED RESEARCH INTERNATIONAL 2014; 2014:549742. [PMID: 24877113 PMCID: PMC4022209 DOI: 10.1155/2014/549742] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 03/15/2014] [Indexed: 01/04/2023]
Abstract
Astrocytic glioma is the most common brain tumor. The glioma initiating cell (GIC) fraction of the tumor is considered as highly chemoresistant, suggesting that GICs are responsible for glioma relapse. A potential treatment for glioma is to induce differentiation of GICs to a more benign and/or druggable cell type. Given BMPs are among the most potent inducers of GIC differentiation, they have been considered as noncytotoxic therapeutic compounds that may be of use to prevent growth and recurrence of glioma. We herein summarize advances made in the understanding of the role of BMP signaling in astrocytic glioma, with a particular emphasis on the effects exerted on GICs. We discuss the prognostic value of BMP signaling components and the implications of BMPs in the differentiation of GICs and in their sensitization to alkylating drugs and oncolytic therapy/chemotherapy. This mechanistic insight may provide new opportunities for therapeutic intervention of brain cancer.
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50
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Nord KH, Lilljebjörn H, Vezzi F, Nilsson J, Magnusson L, Tayebwa J, de Jong D, Bovée JVMG, Hogendoorn PCW, Szuhai K. GRM1 is upregulated through gene fusion and promoter swapping in chondromyxoid fibroma. Nat Genet 2014; 46:474-7. [DOI: 10.1038/ng.2927] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 02/27/2014] [Indexed: 12/14/2022]
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