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Koch MS, Zdioruk M, Nowicki MO, Griffith AM, Aguilar E, Aguilar LK, Guzik BW, Barone F, Tak PP, Tabatabai G, Lederer JA, Chiocca EA, Lawler S. Systemic high-dose dexamethasone treatment may modulate the efficacy of intratumoral viral oncolytic immunotherapy in glioblastoma models. J Immunother Cancer 2022; 10:jitc-2021-003368. [PMID: 35017150 PMCID: PMC8753448 DOI: 10.1136/jitc-2021-003368] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/23/2021] [Indexed: 11/21/2022] Open
Abstract
Background Intratumoral viral oncolytic immunotherapy is a promising new approach for the treatment of a variety of solid cancers. CAN-2409 is a replication-deficient adenovirus that delivers herpes simplex virus thymidine kinase to cancer cells, resulting in local conversion of ganciclovir or valacyclovir into a toxic metabolite. This leads to highly immunogenic cell death, followed by a local immune response against a variety of cancer neoantigens and, next, a systemic immune response against the injected tumor and uninjected distant metastases. CAN-2409 treatment has shown promising results in clinical studies in glioblastoma (GBM). Patients with GBM are usually given the corticosteroid dexamethasone to manage edema. Previous work has suggested that concurrent dexamethasone therapy may have a negative effect in patients treated with immune checkpoint inhibitors in patients with GBM. However, the effects of dexamethasone on the efficacy of CAN-2409 treatment have not been explored. Methods In vitro experiments included cell viability and neurosphere T-cell killing assays. Effects of dexamethasone on CAN-2409 in vivo were examined using a syngeneic murine GBM model; survival was assessed according to Kaplan-Meier; analyses of tumor-infiltrating lymphocytes were performed with mass cytometry (CyTOF - cytometry by time-of-flight). Data were analyzed using a general linear model, with one-way analysis of variance followed by Dunnett’s multiple comparison test, Kruskal-Wallis test, Dunn’s multiple comparison test or statistical significance analysis of microarrays. Results In a mouse model of GBM, we found that high doses of dexamethasone combined with CAN-2409 led to significantly reduced median survival (29.0 days) compared with CAN-2409 treatment alone (39.5 days). CyTOF analyses of tumor-infiltrating immune cells demonstrated potent immune stimulation induced by CAN-2409 treatment. These effects were diminished when high-dose dexamethasone was used. Functional immune cell characterization suggested increased immune cell exhaustion and tumor promoting profiles after dexamethasone treatment. Conclusion Our data suggest that concurrent high-dose dexamethasone treatment may impair the efficacy of oncolytic viral immunotherapy of GBM, supporting the notion that dexamethasone use should be balanced between symptom control and impact on the therapeutic outcome.
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Affiliation(s)
- Marilin S Koch
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Mykola Zdioruk
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Michal O Nowicki
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Alec M Griffith
- Harvard Medical School, Boston, Massachusetts, USA.,Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | | | | | | | | | - Paul P Tak
- Candel Therapeutics, Needham, Massachusetts, USA
| | - Ghazaleh Tabatabai
- Department of Neurology and Interdisciplinary Neuro-Oncology, University Hospital Tuebingen, Tuebingen, Germany
| | - James A Lederer
- Harvard Medical School, Boston, Massachusetts, USA.,Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - E Antonio Chiocca
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Sean Lawler
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA .,Harvard Medical School, Boston, Massachusetts, USA
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Upadhyayula PS, Higgins DM, Argenziano MG, Spinazzi EF, Wu CC, Canoll P, Bruce JN. The Sledgehammer in Precision Medicine: Dexamethasone and Immunotherapeutic Treatment of Glioma. Cancer Invest 2021; 40:554-566. [PMID: 34151678 DOI: 10.1080/07357907.2021.1944178] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Understanding dexamethasone's effect on the immune microenvironment in glioma patients is of key importance. We performed a comprehensive literature review using the NCBI PubMed database for all articles meeting the following search criteria. ((dexamethasone[All Fields]) AND (glioma or glioblastoma)[Title/Abstract]) AND (immune or T cell or B cell or monocyte or neutrophil or macrophage). Forty-three manuscripts were deemed relevant to the topic at hand. Multiple clinical studies have linked dexamethasone use to decreased overall survival while preclinical studies in murine glioma models have demonstrated decreased tumor-infiltrating lymphocytes after dexamethasone administration.
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Affiliation(s)
- Pavan S Upadhyayula
- Department of Neurological Surgery, Columbia Irving University Medical Center, Manhattan, NY, USA
| | - Dominique M Higgins
- Department of Neurological Surgery, Columbia Irving University Medical Center, Manhattan, NY, USA
| | - Michael G Argenziano
- Department of Neurological Surgery, Columbia Irving University Medical Center, Manhattan, NY, USA
| | - Eleonora F Spinazzi
- Department of Neurological Surgery, Columbia Irving University Medical Center, Manhattan, NY, USA
| | - Cheng-Chia Wu
- Department of Radiation Oncology, Columbia Irving University Medical Center, Manhattan, NY, USA
| | - Peter Canoll
- Department of Neurological Surgery, Columbia Irving University Medical Center, Manhattan, NY, USA.,Department of Pathology and Cell Biology, Columbia University Irving Medical Center, Manhattan, NY, USA
| | - Jeffrey N Bruce
- Department of Neurological Surgery, Columbia Irving University Medical Center, Manhattan, NY, USA
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3
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Candela-Noguera V, Vivo-Llorca G, Díaz de Greñu B, Alfonso M, Aznar E, Orzáez M, Marcos MD, Sancenón F, Martínez-Máñez R. Gene-Directed Enzyme Prodrug Therapy by Dendrimer-Like Mesoporous Silica Nanoparticles against Tumor Cells. NANOMATERIALS 2021; 11:nano11051298. [PMID: 34069171 PMCID: PMC8156333 DOI: 10.3390/nano11051298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/06/2021] [Accepted: 05/10/2021] [Indexed: 12/15/2022]
Abstract
We report herein a gene-directed enzyme prodrug therapy (GDEPT) system using gated mesoporous silica nanoparticles (MSNs) in an attempt to combine the reduction of side effects characteristic of GDEPT with improved pharmacokinetics promoted by gated MSNs. The system consists of the transfection of cancer cells with a plasmid controlled by the cytomegalovirus promoter, which promotes β-galactosidase (β-gal) expression from the bacterial gene lacZ (CMV-lacZ). Moreover, dendrimer-like mesoporous silica nanoparticles (DMSNs) are loaded with the prodrug doxorubicin modified with a galactose unit through a self-immolative group (DOXO-Gal) and modified with a disulfide-containing polyethyleneglycol gatekeeper. Once in tumor cells, the reducing environment induces disulfide bond rupture in the gatekeeper with the subsequent DOXO-Gal delivery, which is enzymatically converted by β-gal into the cytotoxic doxorubicin drug, causing cell death. The combined treatment of the pair enzyme/DMSNs-prodrug are more effective in killing cells than the free prodrug DOXO-Gal alone in cells transfected with β-gal.
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Affiliation(s)
- Vicente Candela-Noguera
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
| | - Gema Vivo-Llorca
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
| | - Borja Díaz de Greñu
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - María Alfonso
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Elena Aznar
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 46022 Valencia, Spain
- Unidad Mixta de Investigación en Nanomedicina y Sensores, Instituto de Investigación Sanitaria La Fe (IISLAFE), Universitat Politècnica de València, Avda Fernando Abril Martorell, 46026 Valencia, Spain
| | - Mar Orzáez
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
- Centro de Investigación Príncipe Felipe, Laboratorio de Péptidos y Proteínas, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain
| | - María Dolores Marcos
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 46022 Valencia, Spain
- Unidad Mixta de Investigación en Nanomedicina y Sensores, Instituto de Investigación Sanitaria La Fe (IISLAFE), Universitat Politècnica de València, Avda Fernando Abril Martorell, 46026 Valencia, Spain
| | - Félix Sancenón
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 46022 Valencia, Spain
- Unidad Mixta de Investigación en Nanomedicina y Sensores, Instituto de Investigación Sanitaria La Fe (IISLAFE), Universitat Politècnica de València, Avda Fernando Abril Martorell, 46026 Valencia, Spain
| | - Ramón Martínez-Máñez
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, 46022 Valencia, Spain; (V.C.-N.); (G.V.-L.); (B.D.d.G.); (M.A.); (E.A.); (M.D.M.); (F.S.)
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
- Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina, Universitat Politècnica de València y Centro de Investigación Príncipe Felipe, C/ Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 46022 Valencia, Spain
- Unidad Mixta de Investigación en Nanomedicina y Sensores, Instituto de Investigación Sanitaria La Fe (IISLAFE), Universitat Politècnica de València, Avda Fernando Abril Martorell, 46026 Valencia, Spain
- Correspondence:
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Warawdekar UM, Jain V, Patel H, Nanda A, Kamble V. Modifying gap junction communication in cancer therapy. Curr Res Transl Med 2020; 69:103268. [PMID: 33069641 DOI: 10.1016/j.retram.2020.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/07/2020] [Accepted: 09/22/2020] [Indexed: 12/24/2022]
Abstract
AIM Drug delivery is crucial for therapeutic efficacy and gap junction communication channels (GJIC) facilitate movement within the tumour. Pro-drug activation, a modality of cancer therapy leads to Ganciclovir triphosphate (GCV-TP) incorporation into newly synthesized DNA resulting in cell death. The objective was to enhance, with Histone deacetylase inhibitors (HDACi) and All Trans Retinoic Acid (ATRA), GJIC, crucial for drug delivery, and with combination, abrogate the observed detrimental effect of Dexamethasone (DXM). METHODS Cell lines (NT8E, and HeLa) were pre-treated with Valproic Acid (VPA) (1 mM), 4 Phenyl Butyrate (4PB) (2 mM), ATRA (10 μM) and Dexamethasone (1 μM). Protein quantitated with the Bicinchoninic (BCA) assay for cell lysates, membrane and soluble fractions was assessed with Western blotting for Connexins (43, 26 and 32) and E-Cadherin. A qRT-PCR was done for CX 43-GJA1, CX 26-GJB2, CX 32-GJB1 and E-Cadherin, and normalized with Glyceraldehyde Phosphate dehydrogenase (GAPDH). Further, localization of Connexins (CX) and E-Cadherin, GJIC competence, pre-clinical in-vitro studies and the mechanism of cell death were evaluated. RESULTS There was no toxicity or change in growth patterns observed with the drugs. In both the cell lines CX 43 localized to the membrane whereas CX 32 and CX 26 were present but not membrane bound. E-Cadherin was present on the membrane in NT8E and completely absent in HeLa cells. Effects of HDACi, DXM and ATRA were seen on the expression of Connexins and E-Cadherin in both the cell lines. NT8E and HeLa cell lines showed enhanced GJIC with 4PB [30 %], VPA [36 %] and ATRA [54 %] with a 60 % increase in cytotoxicity and an abrogation of Dexamethasone inhibition on combination with VPA or ATRA. CONCLUSION An enhancement of GJIC function by HDACi and ATRA increased cytotoxicity and could be effective in the presence of Dexamethasone, when combined with ATRA or VPA.
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Affiliation(s)
- Ujjwala M Warawdekar
- CRI Lab 1, Advanced Centre for Treatment, Research & Education in Cancer, Tata Memorial Centre, Navi Mumbai, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400085, India.
| | - Vaishali Jain
- CRI Lab 1, Advanced Centre for Treatment, Research & Education in Cancer, Tata Memorial Centre, Navi Mumbai, India
| | - Himani Patel
- CRI Lab 1, Advanced Centre for Treatment, Research & Education in Cancer, Tata Memorial Centre, Navi Mumbai, India
| | - Adyasha Nanda
- CRI Lab 1, Advanced Centre for Treatment, Research & Education in Cancer, Tata Memorial Centre, Navi Mumbai, India
| | - Vishal Kamble
- CRI Lab 1, Advanced Centre for Treatment, Research & Education in Cancer, Tata Memorial Centre, Navi Mumbai, India
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Synergistic inhibitory effect of resveratrol and TK/GCV therapy on melanoma cells. J Cancer Res Clin Oncol 2020; 146:1489-1499. [PMID: 32246216 DOI: 10.1007/s00432-020-03203-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/26/2020] [Indexed: 12/17/2022]
Abstract
PURPOSE To investigate the synergistic effect of resveratrol on the bystander effect of TK/GCV suicide gene system in melanoma cells. METHODS The effect of resveratrol on the growth of B16 cells and the synergistic effect of resveratrol with or without GCV were detected by MTT assay and high content screening assay. The effect of resveratrol on GJIC function was detected by flow cytometry combined with fluorescence tracer and fluorescence microscope, and the expression of gap junction protein was detected by western blotting. Synergistic killing effect of resveratrol plus TK/GCV was tested in vivo using transplanted melanoma model. RESULTS In vitro, resveratrol can enhanced GJ function and upregulated Cx32 and Cx43 protein expression in B16 cells. Resveratrol synergized with GCV to kill mixed B16 melanoma cells (20% TK+ cells and 80% TK- cells) and to improve apoptosis rate of TK- cells (the bystander effect of TK system), and the synergistic action was reversed by the GJ inhibitor AGA. In vivo, when B16 cells were mixed with 30% TK+ B16 cells, significantly reduced tumor weight and volume were observed after combinational treatment with resveratrol plus GCV as compared with GCV or resveratrol treatment alone. CONCLUSIONS Resveratrol could synergistically enhance the killing effect of TK/GCV suicide gene system in melanoma B16 cells and transplanted melanoma. It might be a promising adjuvant of TK/GCV therapy.
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Dubinski D, Hattingen E, Senft C, Seifert V, Peters KG, Reiss Y, Devraj K, Plate KH. Controversial roles for dexamethasone in glioblastoma - Opportunities for novel vascular targeting therapies. J Cereb Blood Flow Metab 2019; 39:1460-1468. [PMID: 31238763 PMCID: PMC6681527 DOI: 10.1177/0271678x19859847] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Glioblastoma is a highly aggressive and treatment resistant primary brain tumor. Features of glioblastoma include peritumoral cerebral edema, the major contributor to neurological impairment. Although the current clinical approach to edema management is administration of the synthetic corticoid dexamethasone, increasing evidence indicates numerous adverse effects of dexamethasone on glioblastoma burden at the molecular, cellular and clinical level. The contradictions of dexamethasone for glioblastoma and brain metastasis therapy are discussed in this article. Finally, alternative strategies for cerebrovascular edema therapy with vascular stabilizing, anti-permeability agents that are either approved or in clinical trials for diabetic retinopathy and macula edema, are addressed.
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Affiliation(s)
- Daniel Dubinski
- 1 Institute of Neurology (Edinger Institute), University Hospital, Goethe University, Frankfurt am Main, Germany.,2 Department of Neurosurgery, University Hospital, Goethe University, Frankfurt am Main, Germany
| | - Elke Hattingen
- 3 Department of Neuroradiology, University Hospital, Goethe University, Frankfurt am Main, Germany.,4 Frankfurt Cancer Institute, Frankfurt, Germany
| | - Christian Senft
- 2 Department of Neurosurgery, University Hospital, Goethe University, Frankfurt am Main, Germany
| | - Volker Seifert
- 2 Department of Neurosurgery, University Hospital, Goethe University, Frankfurt am Main, Germany
| | | | - Yvonne Reiss
- 1 Institute of Neurology (Edinger Institute), University Hospital, Goethe University, Frankfurt am Main, Germany.,4 Frankfurt Cancer Institute, Frankfurt, Germany.,6 LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Frankfurt am Main, Germany.,7 German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Kavi Devraj
- 1 Institute of Neurology (Edinger Institute), University Hospital, Goethe University, Frankfurt am Main, Germany.,6 LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Frankfurt am Main, Germany
| | - Karl H Plate
- 1 Institute of Neurology (Edinger Institute), University Hospital, Goethe University, Frankfurt am Main, Germany.,4 Frankfurt Cancer Institute, Frankfurt, Germany.,6 LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Frankfurt am Main, Germany.,7 German Cancer Research Center (DKFZ), Heidelberg, Germany
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Chekhonin IV, Chistiakov DA, Grinenko NF, Gurina OI. Glioma Cell and Astrocyte Co-cultures As a Model to Study Tumor-Tissue Interactions: A Review of Methods. Cell Mol Neurobiol 2018; 38:1179-1195. [PMID: 29744691 DOI: 10.1007/s10571-018-0588-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 04/23/2018] [Indexed: 02/08/2023]
Abstract
Astrocytes are a dominant cell type that envelopes the glioma bed. Typically, that is followed by formation of contacts between astrocytes and glioma cells and accompanied by change in astrocyte phenotype, a phenomenon known as a 'reactive astrogliosis.' Generally considered glioma-promoting, astrocytes have many controversial peculiarities in communication with tumor cells, which need thorough examination in vitro. This review is devoted to in vitro co-culture studies of glioma cells and astrocytes. Firstly, we list several fundamental works which allow understanding the modalities of co-culturing. Cell-to-cell interactions between astrocytes and glioma cells, the roles of astrocytes in tumor metabolism, and glioma-related angiogenesis are reviewed. In the review, we also discuss communications between glioma stem cells and astrocytes. Co-cultures of glioma cells and astrocytes are used for studying anti-glioma treatment approaches. We also enumerate surgical, chemotherapeutic, and radiotherapeutic methods assessed in co-culture experiments. In conclusion, we underline collisions in the field and point out the role of the co-cultures for neurobiological studies.
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Affiliation(s)
- Ivan V Chekhonin
- Department of Fundamental and Applied Neurobiology, V. Serbsky National Medical Research Centre for Psychiatry and Narcology, Kropotkinskiy pereulok 23, Moscow, 119034, Russian Federation.
| | - Dimitry A Chistiakov
- Department of Fundamental and Applied Neurobiology, V. Serbsky National Medical Research Centre for Psychiatry and Narcology, Kropotkinskiy pereulok 23, Moscow, 119034, Russian Federation
| | - Nadezhda F Grinenko
- Department of Fundamental and Applied Neurobiology, V. Serbsky National Medical Research Centre for Psychiatry and Narcology, Kropotkinskiy pereulok 23, Moscow, 119034, Russian Federation
| | - Olga I Gurina
- Department of Fundamental and Applied Neurobiology, V. Serbsky National Medical Research Centre for Psychiatry and Narcology, Kropotkinskiy pereulok 23, Moscow, 119034, Russian Federation
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Suzhi Z, Liang T, Yuexia P, Lucy L, Xiaoting H, Yuan Z, Qin W. Gap Junctions Enhance the Antiproliferative Effect of MicroRNA-124-3p in Glioblastoma Cells. J Cell Physiol 2015; 230:2476-88. [DOI: 10.1002/jcp.24982] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 03/03/2015] [Indexed: 12/31/2022]
Affiliation(s)
- Zhang Suzhi
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-Sen University; Guangzhou P.R. China
| | - Tao Liang
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-Sen University; Guangzhou P.R. China
| | - Peng Yuexia
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-Sen University; Guangzhou P.R. China
| | - Liu Lucy
- Department of Cell and Systems Biology; University of Toronto; Ontario Canada
| | - Hong Xiaoting
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-Sen University; Guangzhou P.R. China
| | - Zhang Yuan
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-Sen University; Guangzhou P.R. China
| | - Wang Qin
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-Sen University; Guangzhou P.R. China
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Chen W, Wang D, Du X, He Y, Chen S, Shao Q, Ma C, Huang B, Chen A, Zhao P, Qu X, Li X. Glioma cells escaped from cytotoxicity of temozolomide and vincristine by communicating with human astrocytes. Med Oncol 2015; 32:43. [PMID: 25631631 DOI: 10.1007/s12032-015-0487-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 01/23/2015] [Indexed: 12/14/2022]
Abstract
Resistance to chemotherapeutic drugs remains a great obstacle to successful treatment of gliomas. Understanding the mechanism of glioma chemoresistance is conducive to develop effective strategies to overcome resistance. Astrocytes are the major stromal cells in the brain and have been demonstrated to play a key role in the malignant phenotype of gliomas. However, little is known regarding its role in glioma chemoresistance. In our study, we established a co-culture system of human astrocytes and glioma in vitro to simulate tumor microenvironment. Our results showed that astrocytes significantly reduced glioma cell apoptosis induced by the chemotherapeutic drugs temozolomide and vincristine. This protective effect was dependent on direct contact between astrocytes and glioma cells through Cx43-GJC. Moreover, in human glioma specimens, we found astrocytes infiltrating around the tumor, with a reactive appearance, suggesting that these astrocytes would play the same chemoprotective effect on gliomas in vivo. Our results expand the understanding of the interaction between astrocytes and glioma cells and provide a possible explanation for unsatisfactory clinical outcomes of chemotherapeutic drugs. Cx43-GJC between astrocytes and glioma cells may be a potential target for overcoming chemoresistance in gliomas clinically.
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Affiliation(s)
- Weiliang Chen
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, Jinan, 250012, China
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Seidelin JB, Larsen S, Linnemann D, Vainer B, Coskun M, Troelsen JT, Nielsen OH. Cellular inhibitor of apoptosis protein 2 controls human colonic epithelial restitution, migration, and Rac1 activation. Am J Physiol Gastrointest Liver Physiol 2015; 308:G92-9. [PMID: 25394657 DOI: 10.1152/ajpgi.00089.2014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Identification of pathways involved in wound healing is important for understanding the pathogenesis of various intestinal diseases. Cellular inhibitor of apoptosis protein 2 (cIAP2) regulates proliferation and migration in nonepithelial cells and is expressed in human colonocytes. The aim of the study was to investigate the role of cIAP2 for wound healing in the normal human colon. Wound tissue was generated by taking rectosigmoidal biopsies across an experimental ulcer in healthy subjects after 5, 24, and 48 h. In experimental ulcers, the expression of cIAP2 in regenerating intestinal epithelial cells (IECs) was increased at the wound edge after 24 h (P < 0.05), returned to normal after reepithelialization, and correlated with the inflammatory reaction in the experimental wounds (P < 0.001). cIAP2 was induced in vitro in regenerating Caco2 IECs after wound infliction (P < 0.01). Knockdown of cIAP2 caused a substantial impairment of the IEC regeneration through inhibition of migration (P < 0.005). cIAP2 overexpression lead to formation of migrating IECs and upregulation of expression of RhoA and Rac1 as well as GTP-activation of Rac1. Transforming growth factor-β1 enhanced the expression of cIAP2 but was not upregulated in wounds in vivo and in vitro. NF-κB and MAPK pathways did not affect cIAP2 expression. cIAP2 is in conclusion a regulator of human intestinal wound healing through enhanced migration along with activation of Rac1, and the findings suggest that cIAP2 could be a future therapeutic target to improve intestinal wound healing.
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Affiliation(s)
- Jakob Benedict Seidelin
- Department of Gastroenterology, Medical Section, Herlev Hospital, University of Copenhagen, Copenhagen, Denmark;
| | - Sylvester Larsen
- Department of Science, Systems and Models (NSM), Roskilde University, Roskilde, Denmark
| | - Dorte Linnemann
- Department of Pathology, Herlev Hospital, Herlev, Denmark; and
| | - Ben Vainer
- Department of Pathology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Mehmet Coskun
- Department of Gastroenterology, Medical Section, Herlev Hospital, University of Copenhagen, Copenhagen, Denmark
| | | | - Ole Haagen Nielsen
- Department of Gastroenterology, Medical Section, Herlev Hospital, University of Copenhagen, Copenhagen, Denmark
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Moinfar Z, Dambach H, Faustmann PM. Influence of drugs on gap junctions in glioma cell lines and primary astrocytes in vitro. Front Physiol 2014; 5:186. [PMID: 24904426 PMCID: PMC4032976 DOI: 10.3389/fphys.2014.00186] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 04/25/2014] [Indexed: 12/17/2022] Open
Abstract
Gap junctions (GJs) are hemichannels on cell membrane. Once they are intercellulary connected to the neighboring cells, they build a functional syncytium which allows rapid transfer of ions and molecules between cells. This characteristic makes GJs a potential modulator in proliferation, migration, and development of the cells. So far, several types of GJs are recognized on different brain cells as well as in glioma. Astrocytes, as one of the major cells that maintain neuronal homeostasis, express different types of GJs that let them communicate with neurons, oligodendrocytes, and endothelial cells of the blood brain barrier; however, the main GJ in astrocytes is connexin 43. There are different cerebral diseases in which astrocyte GJs might play a role. Several drugs have been reported to modulate gap junctional communication in the brain which can consequently have beneficial or detrimental effects on the course of treatment in certain diseases. However, the exact cellular mechanism behind those pharmaceutical efficacies on GJs is not well-understood. Accordingly, how specific drugs would affect GJs and what some consequent specific brain diseases would be are the interests of the authors of this chapter. We would focus on pharmaceutical effects on GJs on astrocytes in specific diseases where GJs could possibly play a role including: (1) migraine and a novel therapy for migraine with aura, (2) neuroautoimmune diseases and immunomodulatory drugs in the treatment of demyelinating diseases of the central nervous system such as multiple sclerosis, (3) glioma and antineoplastic and anti-inflammatory agents that are used in treating brain tumors, and (4) epilepsy and anticonvulsants that are widely used for seizures therapy. All of the above-mentioned therapeutic categories can possibly affect GJs expression of astrocytes and the role is discussed in the upcoming chapter.
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Affiliation(s)
- Zahra Moinfar
- International Graduate School of Neuroscience, Ruhr University Bochum Bochum, Germany ; Department of Neuroanatomy and Molecular Brain Research, Ruhr University Bochum Bochum, Germany
| | - Hannes Dambach
- Department of Neuroanatomy and Molecular Brain Research, Ruhr University Bochum Bochum, Germany
| | - Pedro M Faustmann
- International Graduate School of Neuroscience, Ruhr University Bochum Bochum, Germany ; Department of Neuroanatomy and Molecular Brain Research, Ruhr University Bochum Bochum, Germany
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Fan Z, Sehm T, Rauh M, Buchfelder M, Eyupoglu IY, Savaskan NE. Dexamethasone alleviates tumor-associated brain damage and angiogenesis. PLoS One 2014; 9:e93264. [PMID: 24714627 PMCID: PMC3979667 DOI: 10.1371/journal.pone.0093264] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 03/03/2014] [Indexed: 01/05/2023] Open
Abstract
Children and adults with the most aggressive form of brain cancer, malignant gliomas or glioblastoma, often develop cerebral edema as a life-threatening complication. This complication is routinely treated with dexamethasone (DEXA), a steroidal anti-inflammatory drug with pleiotropic action profile. Here we show that dexamethasone reduces murine and rodent glioma tumor growth in a concentration-dependent manner. Low concentrations of DEXA are already capable of inhibiting glioma cell proliferation and at higher levels induce cell death. Further, the expression of the glutamate antiporter xCT (system Xc−; SLC7a11) and VEGFA is up-regulated after DEXA treatment indicating early cellular stress responses. However, in human gliomas DEXA exerts differential cytotoxic effects, with some human glioma cells (U251, T98G) resistant to DEXA, a finding corroborated by clinical data of dexamethasone non-responders. Moreover, DEXA-resistant gliomas did not show any xCT alterations, indicating that these gene expressions are associated with DEXA-induced cellular stress. Hence, siRNA-mediated xCT knockdown in glioma cells increased the susceptibility to DEXA. Interestingly, cell viability of primary human astrocytes and primary rodent neurons is not affected by DEXA. We further tested the pharmacological effects of DEXA on brain tissue and showed that DEXA reduces tumor-induced disturbances of the microenvironment such as neuronal cell death and tumor-induced angiogenesis. In conclusion, we demonstrate that DEXA inhibits glioma cell growth in a concentration and species-dependent manner. Further, DEXA executes neuroprotective effects in brains and reduces tumor-induced angiogenesis. Thus, our investigations reveal that DEXA acts pleiotropically and impacts tumor growth, tumor vasculature and tumor-associated brain damage.
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Affiliation(s)
- Zheng Fan
- Department of Neurosurgery, University Hospital of Erlangen, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Bavaria, Germany
| | - Tina Sehm
- Department of Neurosurgery, University Hospital of Erlangen, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Bavaria, Germany
| | - Manfred Rauh
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Bavaria, Germany
| | - Michael Buchfelder
- Department of Neurosurgery, University Hospital of Erlangen, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Bavaria, Germany
| | - Ilker Y. Eyupoglu
- Department of Neurosurgery, University Hospital of Erlangen, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Bavaria, Germany
| | - Nicolai E. Savaskan
- Department of Neurosurgery, University Hospital of Erlangen, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Bavaria, Germany
- * E-mail:
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Carreno CA, Alcorn JL, Vidaeff AC, Bishop KD, Blackwell SC, Sibai BM. Corticosteroids effect on caspase 3 expression in an in-vitro model of hypoxic brain cells. J Matern Fetal Neonatal Med 2013; 26:1758-61. [PMID: 23687982 DOI: 10.3109/14767058.2013.798287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Effects of corticosteroids (CS) in the brain of growth-restricted fetus remain largely unstudied. We investigated if dexamethasone (DXM) exposure contributes to neuronal injury in an in-vitro model of neuronal cells under hypoxic conditions (surrogate for fetal growth restriction). STUDY DESIGN U87 glioblastoma cells exposed to hypoxic or normoxic conditions for 10 h were incubated in the absence or presence of DXM for 48 h. Apoptosis as possible indicator of neurotoxicity was determined using a caspase-3-specific activity assay and western blotting. Caspase-3 was calculated as percentage of mean caspase-3 cleavage. Each experiment was performed in triplicate (n = 48). Caspase 3 activity in cell culture media was also measured by ELISA. RESULTS Pro-caspase-3 (32 kDa) was expressed in culture, but activated 17 Kd caspase 3 was not expressed in cell lysate. There was no difference in ratio of caspase 3 activation when U87 cells were exposed to 10 v of hypoxia as compared to normoxia (0.46 ± 0.44 versus 0.37 ± 0.37). The pro-apoptotic effects of DXM were not increased by pre-exposure to hypoxia: (0.37 ± 0.37 versus 0.47 ± 0.40). CONCLUSION The addition of DXM to hypoxic U87 cells had no additive or synergistic effects on the activation of caspase 3. Therefore, we speculate that the administration of CS in the setting of fetal growth restriction would not lead to increased apoptosis with potential neuronal injury.
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Affiliation(s)
- Carlos A Carreno
- Division of Maternal Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences and
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Qiang L, Yanping L, Zonghai H, Fei C, Zhou L, Jinlong Y. Study of the Mechanism of Bystander Effect of KDR-CDglyTK System Mediated by Adenovirus for the Treatment of Gastric Cancer. Cell Biochem Biophys 2013; 67:1021-7. [DOI: 10.1007/s12013-013-9599-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Li Q, Huang ZH, Chen F, Yu JL. Mechanism of bystander effect in therapy of stomach cancer with the KDR-CDglyTK suicide gene system. Shijie Huaren Xiaohua Zazhi 2012; 20:749-753. [DOI: 10.11569/wcjd.v20.i9.749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the relation between intercellular gap connection and bystander effect in therapy of stomach cancer with the KDR-CDglyTK suicide system.
METHODS: SCG7901 and HeLa cells were infected with adenovirus-based KDR-CDglyTK system (AdKDR-CDglyTK), and the expression of CDglyTK fusion gene in infected cells was confirmed by RT-PCR. Gap junction intercellular communication was determined by fluorescence recovery after photobleaching (FRAC) in SCG7901 and HeLa cells in the presence or absence of versulin. Infected and non-infected cells were mixed with a proportion of 5% and 95% or 10% and 90%, cultured in the presence or absence of versulin, and then used to detect cell survival by MTT assay.
RESULTS: The expression of GFP was observed in both infected SCG7901 cells and HeLa cells. Fluorescence intensity was gradually recovered at different time points after bleaching in SCG7901 cells cultured with versulin. Compared to SCG7901 cells cultured without versulin, the fluorescence recovery of bleached cells cultured with versulin was more obvious at the same time points. In contrast, fluorescence intensity showed no significant changes in HeLa cells cultured with versulin. The mean fluorescence recovery rate had a significant difference between SCG7901 and HeLa cells cultured with versulin. When infected and non-infected cells were mixed at different proportions, cell survival showed a significant difference between groups of SCG7901 cells (F = 144.42, 407.83; both P = 0.000), but had no significance difference between groups of HeLa cells (F = 0.386, 0.895; P = 0.765, 0.472).
CONCLUSION: There is a relation between intercellular communication and gap connection in SCG7901 cells but not in HeLa cells. Versulin can enhance the bystander effect in therapy with the suicide gene system in vitro. The mechanism of bystander effect in therapy with the suicide gene system may involve gap connection.
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Neschadim A, Wang JCM, Lavie A, Medin JA. Bystander killing of malignant cells via the delivery of engineered thymidine-active deoxycytidine kinase for suicide gene therapy of cancer. Cancer Gene Ther 2012; 19:320-7. [PMID: 22388453 DOI: 10.1038/cgt.2012.4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Activity and specificity of chemotherapeutic agents against solid tumors can be augmented via the targeted or localized delivery of 'suicide' genes. Selective activation of specific prodrugs in cells expressing the 'suicide' gene drives their elimination by apoptosis, while also enabling the killing of adjacent bystander cells. Strong bystander effects can compensate for poor 'suicide' gene delivery, and depend on the prodrugs used and mechanisms for the acquisition of activated drug by the bystander population, such as the presence of gap junctional intercellular communications. Although a number of 'suicide' gene therapies for cancer have been developed and characterized, such as herpes simplex virus-derived thymidine kinase (HSV-tk)-based activation of ganciclovir, their limited success highlights the need for the development of more robust approaches. Limiting activation kinetics and evolution of chemoresistance are major obstacles. Here we describe 'suicide' gene therapy of cancer based on the lentivirus-mediated delivery of a thymidine-active human deoxycytidine kinase variant. This enzyme possesses substrate plasticity that enables it to activate a multitude of prodrugs, some with distinct mechanisms of action. We evaluated the magnitude and mechanisms of bystander effects induced by different prodrugs, and show that when used in combination, they can synergistically enhance the bystander effect while avoiding off-target toxicity.
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Affiliation(s)
- A Neschadim
- Department of Medical Biophysics, University Health Network, University of Toronto, Toronto, Ontario, Canada
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17
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Hinkerohe D, Wolfkühler D, Haghikia A, Meier C, Faustmann PM, Schlegel U. Dexamethasone differentially regulates functional membrane properties in glioma cell lines and primary astrocytes in vitro. J Neurooncol 2010; 103:479-89. [PMID: 21107646 DOI: 10.1007/s11060-010-0456-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Accepted: 11/08/2010] [Indexed: 11/26/2022]
Abstract
Similar to astrocytes, glioma cells form a well-coupled syncytium via gap junctions. This can be influenced, for example, by activated microglia, the main inflammatory cell population within the central nervous system (CNS). Under pathological conditions such as neoplastic cell growth, microglia number and activation state are enhanced. The aim of the present study is to analyze the influence of dexamethasone (DEX) on cellular and molecular properties in glial coculture models consisting of astroglia and microglia and human and rat glioma cell lines. Primary rat glial cocultures of astrocytes containing 5% (M5, representing "physiological" conditions) or 30% (M30, representing "pathological" conditions) microglia as well as rat and human glioma cell lines (F98, C6, U87) were incubated with DEX for 24 h. DEX-treated M30 cocultures showed significant increased gap junctional intercellular communication (GJIC). DEX treatment of glioma cells resulted in depolarization of the membrane resting potential (MRP) and a significant reduction of GJIC. Furthermore, DEX reduced the amount of activated microglia in M30 cocultures. DEX had no significant effects on the tested variables in the M5 coculture. DEX differentially regulates functional membrane properties of glioma cells and astrocytes in primary glial cocultures, which might resemble steroid effects in glioma cells and adjacent glial components in vivo.
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Affiliation(s)
- Daniel Hinkerohe
- Department of Neurology, Knappschafts Hospital Bochum Langendreer, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany.
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Synthesis and cytotoxicity evaluation of novel 1,4-disubstituted 1,2,3-triazoles via CuI catalysed 1,3-dipolar cycloaddition. Eur J Med Chem 2010; 45:5044-50. [DOI: 10.1016/j.ejmech.2010.08.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 08/02/2010] [Accepted: 08/06/2010] [Indexed: 11/20/2022]
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Crespin S, Bechberger J, Mesnil M, Naus CC, Sin WC. The carboxy-terminal tail of connexin43 gap junction protein is sufficient to mediate cytoskeleton changes in human glioma cells. J Cell Biochem 2010; 110:589-97. [PMID: 20512920 DOI: 10.1002/jcb.22554] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Connexin43 (Cx43) is a ubiquitously expressed member of the gap junction protein family that mediates gap junction intercellular communication (GJIC) by allowing exchange of cytosolic materials. Previous studies have used Cx43 truncated at the cytoplasmic tail (C-tail) to demonstrate that the C-tail is essential to regulate cell growth and motility. Therefore, the aim of our study was to delineate the respective role of the truncated Cx43 and the C-tail in mediating Cx43-dependent signaling. A truncated Cx43 expressing the channel part of the protein (TrCx43, amino acid 1-242) and a construct encompassing only the C-tail from amino acid 243 (243Cx43) were transduced into LN18 human glioma cells. Our results showed that the ability of Cx43 to suppress growth was independent of GJIC as assessed by dye transfer, but was dependent on the presence of a rigid extracellular matrix. We further demonstrated that the C-tail alone is sufficient to promote motility. Surprisingly, Cx43 is also able to increase migration in the absence of the C-tail, suggesting the presence of at least two distinct signaling mechanisms utilized by Cx43 to affect motility. Finally, we used time-lapse imaging to examine the behavior of migrating cells and it was apparent that the C-tail was associated with a lamellipodia-based migration not observed in either mock or TrCx43 expressing LN18 cells. Our study shows for the first time that a free C-tail is sufficient to induce Cx43-dependent changes in cell morphology and that Cx43 signaling is linked to the regulation of the actin cytoskeleton.
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Affiliation(s)
- Sophie Crespin
- Institut de Physiologie et Biologie Cellulaires, Université de Poitiers, CNRS-UMR 6187, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France
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Paíno T, Gangoso E, Medina JM, Tabernero A. Inhibition of ATP-sensitive potassium channels increases HSV-tk/GCV bystander effect in U373 human glioma cells by enhancing gap junctional intercellular communication. Neuropharmacology 2010; 59:480-91. [PMID: 20603136 DOI: 10.1016/j.neuropharm.2010.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 06/15/2010] [Accepted: 06/25/2010] [Indexed: 01/16/2023]
Abstract
It is well known that the efficiency of Herpes simplex virus thymidine kinase gene/ganciclovir (HSV-tk/GCV) therapy is improved by the bystander effect, which mainly relies on gap junctional intercellular communication (GJIC). Malignant gliomas communicate poorly through gap junctions, consequently, agents with the ability to increase GJIC are good candidates to improve the efficiency of this therapy. Since we previously showed that the inhibition of ATP-sensitive potassium (KATP) channels promoted by tolbutamide increased GJIC in rat C6 glioma cells, we have investigated whether tolbutamide could increase the bystander effect in HSV-tk/GCV therapy against human glioma cells. We found that tolbutamide increased GJIC in U373 human glioma cells, an effect that was due to the up-regulation of connexin43, a protein that forms gap junctions channels. More interestingly, our results show that tolbutamide increased the efficiency of HSV-tk/GCV in co-cultures containing U373 cells and U373 cells transfected with HSV-tk. This effect was impaired in the presence of carbenoxolone, an inhibitor of GJIC. Furthermore, tolbutamide did not enhance the bystander effect in connexin43-silenced co-cultures. Together our results reveal that the inhibition of KATP channels promoted by tolbutamide enhances the bystander effect in HSV-tk/GCV therapy by increasing connexin43-mediated gap junctional intercellular communication in U373 human glioma cells.
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Affiliation(s)
- Teresa Paíno
- Departamento de Bioquímica y Biología Molecular, Instituto de Neurociencias de Castilla y León, INCYL, Universidad de Salamanca, Spain
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Misharin AY, Mehtiev AR, Zhabinskii VN, Khripach VA, Timofeev VP, Tkachev YV. Toxicity of (22R,23R)-22,23-dihydroxystigmastane derivatives to cultured cancer cells. Steroids 2010; 75:287-94. [PMID: 20096295 DOI: 10.1016/j.steroids.2010.01.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Revised: 01/07/2010] [Accepted: 01/11/2010] [Indexed: 11/30/2022]
Abstract
Toxicity of eight 22,23-dihydroxystigmastane derivatives (four pairs of (22R,23R)- and (22S,23S)-isomers differing in steroid backbone structure) to human breast carcinoma MCF-7 cells was compared. For every pair of structurally related compounds, (22R,23R) isomer was found to be significantly more toxic than (22S,23S) isomer. Computational analysis showed that side chain of (22R,23R)-22,23-dihydroxystigmastane derivatives is rigid, whereas that of (22S,23S)-isomers is rather flexible. Structure of steroid backbone significantly affects cytotoxicity of (22R,23R)-22,23-dihydroxystigmastane derivatives to human breast carcinoma MCF-7 cells, human ovary carcinoma CaOv cells, and human prostate carcinoma LnCaP cells. (22R,23R)-3beta,22,23-trihydroxystigmast-5-ene and (22R,23R)-3beta,22,23-trihydroxystigmast-5-en-7-one, both comprising equatorial 3beta-hydroxyl group, exhibited the highest cytotoxicity, while the most polar 28-homobrassinolide and 28-homocastasterone, both comprising 2alpha,3alpha-dihydroxy groups, exhibited the lowest toxicity. Binding of (22R,23R)-22,23-dihydroxystigmastane derivatives to plasmatic membrane was suggested to be important for cytotoxicity.
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Liu WQ, Yang J, Dong J. Effects of HSV-TK+GFP/GCV suicide gene therapy system on mouse pancreatic cancer cells. Shijie Huaren Xiaohua Zazhi 2009; 17:1498-1503. [DOI: 10.11569/wcjd.v17.i15.1498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study in vitro therapeutic effect on mouse pancreatic cancer, as well as the bystander effect with HSV-TK suicide gene in combination with prodrug GCV.
METHODS: HSV-TK and GFP were inserted into pcDNA3.1 (+) to construct pcDNA3.1+/HSV-TK+GFP, and pcDNA3.1+/HSV-TK+GFP was transferred into mouse pancreatic cancer cell MPC by Lipofectin. We then added GCV to these gene-modified cells and studied the sensitivity of the cells to GCV as well as the bystander effect.
RESULTS: The gene modified pancreatic cancer cells MPC/HSV-TK+GFP were successfully developed. In vitro experiments showed that when the MPC/HSV-TK+GFP cells accounted for 10% of hybrid cells, the low concentration (20 mg/L) of GCV was about 50% of tumor cell killing. In vivo results showed that the low concentration of GCV killed the cells. And tumor growth of the mouse model was inhibited.
CONCLUSION: Our data demonstrate MPC/HSV-TK+GFP cells are sensitive to the treatment of GCV compared with unmodified tumor cells, and remarkable bystander effect is seen.
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Lifang Y, Min T, Midan A, Ya C. HSV-tk/GCV gene therapy mediated by EBV-LMP1 for EBV-associated cancer. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2008; 27:42. [PMID: 18811956 PMCID: PMC2562992 DOI: 10.1186/1756-9966-27-42] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Accepted: 09/23/2008] [Indexed: 11/23/2022]
Abstract
Background To investigate the feasibility of gene therapy in treating Epstein-Barr virus (EBV)-associated cancer by employing the suicide gene, herpes simplex virus thymidine kinase/ganciclovir (HSV-tk/GCV), which uses the signaling pathway through the HIV-long terminal repeat (LTR) gene which is expressed from a nuclear factor-κB (NF-κB)-binding motif-containing promoter that is regulated by EBV-latent membrane protein 1 (LMP1) via NF-κB. Methods First, we constructed the plasmid pVLTR-tk, which was regulated by EBV-LMP1 via NF-κB, and then investigated the cytotoxic effect of the pVLTR-tk/GCV on cancer cells, using MTT assays, clonogenic assays, flow cytometry, and animal experiments. Results The activation of TK was increased after transfection of the pVLTR-tk into the EBV-LMP1 positive cells. After GCV treatment, the clonogenicity and survival of the cells substantially declined, and a bystander effect was also observed. The LMP1 positive cells exhibited remarkable apoptosis following pVLTR-tk/GCV treatment, and the pVLTR-tk/GCV restrained tumor growth in vivo for EBV-LMP1 positive cancers. Conclusion The pVLTR-tk/GCV suicide gene system may be used as a new gene targeting strategy for EBV-associated cancer.
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Affiliation(s)
- Yang Lifang
- Molecular Biology Research Center, Cancer Research Institute, XiangYa School of Medicine, Central South University, ChangSha, Hunan, 410078, PR China.
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Bortezomib-induced enzyme-targeted radiation therapy in herpesvirus-associated tumors. Nat Med 2008; 14:1118-22. [PMID: 18776891 DOI: 10.1038/nm.1864] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Accepted: 03/10/2008] [Indexed: 12/13/2022]
Abstract
We investigated the possibility of using a pharmacologic agent to modulate viral gene expression to target radiotherapy to tumor tissue. In a mouse xenograft model, we had previously shown targeting of [(125)I]2'-fluoro-2'-deoxy-beta-D-5-iodouracil-arabinofuranoside ([(125)I]FIAU) to tumors engineered to express the Epstein-Barr virus thymidine kinase (EBV-TK). Here we extend those results to targeting of a therapeutic radiopharmaceutical [(131)I]FIAU to slow or stop tumor growth or to achieve tumor regression. These outcomes were achieved in xenografts with tumors that constitutively expressed the EBV-TK. With naturally infected EBV tumor cell lines (Burkitt's lymphoma and gastric carcinoma), activation of viral gene expression by pretreatment with bortezomib was required. Marked changes in tumor growth could also be achieved in naturally infected Kaposi's sarcoma herpesvirus tumors after pretreatment with bortezomib. Bortezomib-induced enzyme-targeted radiation therapy illustrates the possibility of pharmacologically modulating tumor gene expression to result in targeted radiotherapy.
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Villeneuve J, Galarneau H, Beaudet MJ, Tremblay P, Chernomoretz A, Vallières L. Reduced glioma growth following dexamethasone or anti-angiopoietin 2 treatment. Brain Pathol 2008; 18:401-14. [PMID: 18371178 DOI: 10.1111/j.1750-3639.2008.00139.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
All patients with glioblastoma, the most aggressive and common form of brain cancer, develop cerebral edema. This complication is routinely treated with dexamethasone, a steroidal anti-inflammatory drug whose effects on brain tumors are not fully understood. Here we show that dexamethasone can reduce glioma growth in mice, even though it depletes infiltrating T cells with potential antitumor activity. More precisely, T cells with helper or cytotoxic function were sensitive to dexamethasone, but not those that were negative for the CD4 and CD8 molecules, including gammadelta and natural killer (NK) T cells. The antineoplastic effect of dexamethasone was indirect, as it did not meaningfully affect the growth and gene expression profile of glioma cells in vitro. In contrast, hundreds of dexamethasone-modulated genes, notably angiopoietin 2 (Angpt2), were identified in cultured cerebral endothelial cells by microarray analysis. The ability of dexamethasone to attenuate Angpt2 expression was confirmed in vitro and in vivo. Selective neutralization of Angpt2 using a peptide-Fc fusion protein reduced glioma growth and vascular enlargement to a greater extent than dexamethasone, without affecting T cell infiltration. In conclusion, this study suggests a mechanism by which dexamethasone can slow glioma growth, providing a new therapeutic target for malignant brain tumors.
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Affiliation(s)
- Jérôme Villeneuve
- Department of Oncology and Molecular Endocrinology, Laval University Hospital Research Center, Québec City, Québec, Canada
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Piette C, Munaut C, Foidart JM, Deprez M. Treating gliomas with glucocorticoids: from bedside to bench. Acta Neuropathol 2006; 112:651-64. [PMID: 16855833 DOI: 10.1007/s00401-006-0100-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 06/09/2006] [Accepted: 06/09/2006] [Indexed: 02/07/2023]
Abstract
Glucocorticoids are used in the treatment of gliomas to decrease tumour-associated oedema and to reduce the risk of acute encephalopathy associated with radiotherapy. However, the mechanisms by which glucocorticoids work are still largely unknown. In this paper, we survey the experimental and clinical evidence for the effects of glucocorticoids on tumour cell proliferation, apoptosis and sensitivity to chemotherapy, angiogenesis and vascular permeability. We then review current guidelines on the choice of molecule, dose and duration of glucocorticoid treatment for gliomas.
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Affiliation(s)
- Caroline Piette
- Laboratoire de Biologie des Tumeurs et du Développement, Université de Liège, Liège, Belgium
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Ngezahayo A, Altmann B, Steffens M, Kolb HA. Gap Junction Coupling and Apoptosis in GFSHR-17 Granulosa Cells. J Membr Biol 2005; 204:137-44. [PMID: 16245036 DOI: 10.1007/s00232-005-0756-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 06/10/2005] [Indexed: 11/30/2022]
Abstract
Recently, we found that intracellular washout of cGMP induces gap junction uncoupling and proposed a link between gap junction uncoupling and stimulation of apoptotic reactions in GFSHR-17 granulosa cells. In the present report we show that an inhibitor of guanylyl cyclase, ODQ, reduces gap junction coupling and promotes apoptotic reactions such as chromatin condensation and DNA strand breaks. To analyze whether gap junction uncoupling and induction of apoptotic reactions are related, the cells were treated with heptanol and 18 beta-GA, two known gap junction uncouplers. Gap junction coupling of GFSHR-17 cells could be restored if the incubation time with the gap junction uncouplers was less than 10 min. A prolonged incubation time irreversibly suppressed gap junction coupling and caused chromatin condensation as well as DNA degradation. The promotion of apoptotic reactions by heptanol or 18 beta-GA was not observed in cells with low gap junction coupling like HeLa cells, indicating that the observed genotoxic reactions are not caused by unspecific effects of gap junction uncouplers. Additionally, it was observed that heptanol or 18 beta-GA did not induce a sustained rise of [Ca(2+)](i). The effects of gap junction uncouplers could not be suppressed by the presence of 8-Br-cGMP. It is discussed that irreversible gap junction uncoupling can be mediated by cGMP-dependent as well as cGMP-independent pathways and in turn could lead to stimulation of apoptotic reactions in granulosa cells.
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Affiliation(s)
- A Ngezahayo
- Institute of Biophysics, University Hannover, Herrenhäuserstr. 2, D-30419 Hannover, Germany.
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