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Ramapriyan R, Sun J, Curry A, Richardson LG, Ramesh T, Gaffey MA, Gedeon PC, Gerstner ER, Curry WT, Choi BD. The Role of Antibody-Based Therapies in Neuro-Oncology. Antibodies (Basel) 2023; 12:74. [PMID: 37987252 PMCID: PMC10660525 DOI: 10.3390/antib12040074] [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: 08/30/2023] [Revised: 10/16/2023] [Accepted: 11/07/2023] [Indexed: 11/22/2023] Open
Abstract
This review explores the evolving landscape of antibody-based therapies in neuro-oncology, in particular, immune checkpoint inhibitors and immunomodulatory antibodies. We discuss their mechanisms of action, blood-brain barrier (BBB) penetration, and experience in neuro-oncological conditions. Evidence from recent trials indicates that while these therapies can modulate the tumor immune microenvironment, their clinical benefits remain uncertain, largely due to challenges with BBB penetration and tumor-derived immunosuppression. This review also examines emerging targets such as TIGIT and LAG3, the potential of antibodies in modulating the myeloid compartment, and tumor-specific targets for monoclonal antibody therapy. We further delve into advanced strategies such as antibody-drug conjugates and bispecific T cell engagers. Lastly, we explore innovative techniques being investigated to enhance antibody delivery, including CAR T cell therapy. Despite current limitations, these therapies hold significant therapeutic potential for neuro-oncology. Future research should focus on optimizing antibody delivery to the CNS, identifying novel biological targets, and discovering combination therapies to address the hostile tumor microenvironment.
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Affiliation(s)
- Rishab Ramapriyan
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
- Harvard Medical School, Boston, MA 02115, USA (E.R.G.)
| | - Jing Sun
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
| | - Annabel Curry
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
| | - Leland G. Richardson
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
| | - Tarun Ramesh
- Harvard Medical School, Boston, MA 02115, USA (E.R.G.)
| | - Matthew A. Gaffey
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
| | - Patrick C. Gedeon
- Harvard Medical School, Boston, MA 02115, USA (E.R.G.)
- Department of Surgery, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Elizabeth R. Gerstner
- Harvard Medical School, Boston, MA 02115, USA (E.R.G.)
- Department of Neurology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - William T. Curry
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
- Harvard Medical School, Boston, MA 02115, USA (E.R.G.)
| | - Bryan D. Choi
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, USA (A.C.); (L.G.R.); (W.T.C.)
- Harvard Medical School, Boston, MA 02115, USA (E.R.G.)
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Investigational Microbiological Therapy for Glioma. Cancers (Basel) 2022; 14:cancers14235977. [PMID: 36497459 PMCID: PMC9736089 DOI: 10.3390/cancers14235977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/27/2022] [Accepted: 11/29/2022] [Indexed: 12/07/2022] Open
Abstract
Glioma is the most common primary malignancy of the central nervous system (CNS), and 50% of patients present with glioblastoma (GBM), which is the most aggressive type. Currently, the most popular therapies are progressive chemotherapy and treatment with temozolomide (TMZ), but the median survival of glioma patients is still low as a result of the emergence of drug resistance, so we urgently need to find new therapies. A growing number of studies have shown that the diversity, bioactivity, and manipulability of microorganisms make microbial therapy a promising approach for cancer treatment. However, the many studies on the research progress of microorganisms and their derivatives in the development and treatment of glioma are scattered, and nobody has yet provided a comprehensive summary of them. Therefore, in this paper, we review the research progress of microorganisms and their derivatives in the development and treatment of glioma and conclude that it is possible to treat glioma by exogenous microbial therapies and targeting the gut-brain axis. In this article, we discuss the prospects and pressing issues relating to these therapies with the aim of providing new ideas for the treatment of glioma.
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Production and Evaluation of an Avian IgY Immunotoxin against CD133+ for Treatment of Carcinogenic Stem Cells in Malignant Glioma: IgY Immunotoxin for the Treatment of Glioblastoma. JOURNAL OF ONCOLOGY 2019; 2019:2563092. [PMID: 31275378 PMCID: PMC6582814 DOI: 10.1155/2019/2563092] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/25/2019] [Accepted: 05/09/2019] [Indexed: 02/07/2023]
Abstract
Background Glioblastoma is the most common malignant tumor of Central Nervous System. Despite the research in therapeutics, the prognosis is dismal. Malignant glioma stem cells (MGSCs) are a major cause of treatment failure and increasing tumor recurrence. In general, cancer stem cells (CSCs) express prominin-1 (CD133), considered as a potential therapeutic target. In this study, we produced an avian immunotoxin directed against the subpopulation of CD133+ CSCs within a malignant glioma. We used the avian IgY because it has various advantages as increased affinity to mammal antigens and inexpensive obtention of large amounts of specific antibodies (approximately 1 mg/per egg). The design, production, purification and use of IgY anti CD133 immunotoxin constitute an original goal of this research. Methods The immunodominant peptide of CD133 was designed to immunize hens; also, the extracellular domain of CD133 was cloned to probe the IgY antibodies. In parallel, a recombinant abrin A chain was produced in E. coli in order to join it to the Fc domain of the anti-CD133 IgY to conform the immunotoxin. This anti-CD133 IgY anti-tumor immunotoxin was tested in vitro and in vivo. Results. The cytotoxicity of the immunotoxin in vitro showed that IgY-abrin immunotoxin reduced 55% cell viability. After subcutaneous MGSCs implantation, the animals treated intraperitoneally or intratumorally with the IgY-abrin immunotoxin showed more than 50% decrease of tumor volume. Conclusion Results showed that the IgY-abrin immunotoxin had cytotoxic activity against CD133+ MGSCs and provides a novel approach for the immunotherapy of glioblastoma.
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Sharma P, Debinski W. Receptor-Targeted Glial Brain Tumor Therapies. Int J Mol Sci 2018; 19:E3326. [PMID: 30366424 PMCID: PMC6274942 DOI: 10.3390/ijms19113326] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/16/2018] [Accepted: 10/19/2018] [Indexed: 12/24/2022] Open
Abstract
Among primary brain tumors, malignant gliomas are notably difficult to manage. The higher-grade tumors represent an unmet need in medicine. There have been extensive efforts to implement receptor-targeted therapeutic approaches directed against gliomas. These approaches include immunotherapies, such as vaccines, adoptive immunotherapy, and passive immunotherapy. Targeted cytotoxic radio energy and pro-drug activation have been designed specifically for brain tumors. The field of targeting through receptors progressed significantly with the discovery of an interleukin 13 receptor alpha 2 (IL-13RA2) as a tumor-associated receptor over-expressed in most patients with glioblastoma (GBM) but not in normal brain. IL-13RA2 has been exploited in novel experimental therapies with very encouraging clinical responses. Other receptors are specifically over-expressed in many patients with GBM, such as EphA2 and EphA3 receptors, among others. These findings are important in view of the heterogeneity of GBM tumors and multiple tumor compartments responsible for tumor progression and resistance to therapies. The combined targeting of multiple receptors in different tumor compartments should be a preferred way to design novel receptor-targeted therapeutic approaches in gliomas.
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Affiliation(s)
- Puja Sharma
- Brain Tumor Center of Excellence, Department of Cancer Biology, Wake Forest University School of Medicine, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, 1 Medical Center Boulevard, Winston-Salem, NC 27157, USA.
| | - Waldemar Debinski
- Brain Tumor Center of Excellence, Department of Cancer Biology, Wake Forest University School of Medicine, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, 1 Medical Center Boulevard, Winston-Salem, NC 27157, USA.
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Autelitano F, Loyaux D, Roudières S, Déon C, Guette F, Fabre P, Ping Q, Wang S, Auvergne R, Badarinarayana V, Smith M, Guillemot JC, Goldman SA, Natesan S, Ferrara P, August P. Identification of novel tumor-associated cell surface sialoglycoproteins in human glioblastoma tumors using quantitative proteomics. PLoS One 2014; 9:e110316. [PMID: 25360666 PMCID: PMC4216004 DOI: 10.1371/journal.pone.0110316] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/11/2014] [Indexed: 11/21/2022] Open
Abstract
Glioblastoma multiform (GBM) remains clinical indication with significant “unmet medical need”. Innovative new therapy to eliminate residual tumor cells and prevent tumor recurrences is critically needed for this deadly disease. A major challenge of GBM research has been the identification of novel molecular therapeutic targets and accurate diagnostic/prognostic biomarkers. Many of the current clinical therapeutic targets of immunotoxins and ligand-directed toxins for high-grade glioma (HGG) cells are surface sialylated glycoproteins. Therefore, methods that systematically and quantitatively analyze cell surface sialoglycoproteins in human clinical tumor samples would be useful for the identification of potential diagnostic markers and therapeutic targets for malignant gliomas. In this study, we used the bioorthogonal chemical reporter strategy (BOCR) in combination with label-free quantitative mass spectrometry (LFQ-MS) to characterize and accurately quantify the individual cell surface sialoproteome in human GBM tissues, in fetal, adult human astrocytes, and in human neural progenitor cells (NPCs). We identified and quantified a total of 843 proteins, including 801 glycoproteins. Among the 843 proteins, 606 (72%) are known cell surface or secreted glycoproteins, including 156 CD-antigens, all major classes of cell surface receptor proteins, transporters, and adhesion proteins. Our findings identified several known as well as new cell surface antigens whose expression is predominantly restricted to human GBM tumors as confirmed by microarray transcription profiling, quantitative RT-PCR and immunohistochemical staining. This report presents the comprehensive identification of new biomarkers and therapeutic targets for the treatment of malignant gliomas using quantitative sialoglycoproteomics with clinically relevant, patient derived primary glioma cells.
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Affiliation(s)
- François Autelitano
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
- * E-mail:
| | - Denis Loyaux
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
| | - Sébastien Roudières
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
| | - Catherine Déon
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
| | - Frédérique Guette
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
| | - Philippe Fabre
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
| | - Qinggong Ping
- ALS Therapy Development Institute, Cambridge, Massachusetts, United States of America
| | - Su Wang
- Department of Neurology, University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Romane Auvergne
- Department of Neurology, University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | | | - Michael Smith
- Sanofi Tucson Research Center, Oro Valley, Arizona, United States of America
| | | | - Steven A. Goldman
- Department of Neurology, University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | | | - Pascual Ferrara
- Sanofi-Aventis Recherche & Développement, Centre de Toulouse, Toulouse, France
| | - Paul August
- Sanofi Tucson Research Center, Oro Valley, Arizona, United States of America
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6
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Toomer KH, Chen Z. Autoimmunity as a double agent in tumor killing and cancer promotion. Front Immunol 2014; 5:116. [PMID: 24672527 PMCID: PMC3957029 DOI: 10.3389/fimmu.2014.00116] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 03/05/2014] [Indexed: 12/19/2022] Open
Abstract
Cancer immunotherapy through manipulation of the immune system holds great potential for the treatment of human cancers. However, recent trials targeting the negative immune regulators cytotoxic T-lymphocyte antigen 4, programed death 1 (PD-1), and PD-1 receptor ligand (PD-L1) demonstrated that clinically significant antitumor responses were often associated with the induction of autoimmune toxicity. This finding suggests that the same immune mechanisms that elicit autoimmunity may also contribute to the destruction of tumors. Given the fact that the immunological identity of tumors might be largely an immunoprivileged self, autoimmunity may not represent a wholly undesirable outcome in the context of cancer immunotherapy. Rather, targeted killing of cancer cells and autoimmune damage to healthy tissues may be intricately linked through molecular mechanisms, in particular inflammatory cytokine signaling. On the other hand, since chronic inflammation is a well-recognized condition that promotes tumor development, it appears that autoimmunity can be a "double agent" in mediating either pro-tumor or antitumor effects. This review surveys the tumor-promoting and tumoricidal activities of several prominent cytokines: IFN-γ, TNF-α, TGF-β, IL-17, IL-23, IL-4, and IL-13, produced by three major subsets of T helper cells that interact with innate immune cells. Many of these cytokines exert divergent and seemingly contradictory effects on cancer development in different human and animal models, suggesting a high degree of context dependence in their functions. We hypothesize that these inflammatory cytokines could mediate a feedback loop of autoimmunity, antitumor immunity, and tumorigenesis. Understanding the diverse and paradoxical roles of cytokines from autoimmune responses in the setting of cancer will advance the long-term goal of improving cancer immunotherapy, while minimizing the hazards of immune-mediated tissue damage and the possibility of de novo tumorigenesis, through proper monitoring and preventive measures.
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Affiliation(s)
- Kevin H Toomer
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine , Miami, FL , USA
| | - Zhibin Chen
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine , Miami, FL , USA ; Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine , Miami, FL , USA
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7
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Mut M, Schiff D. Unmet needs in the treatment of glioblastoma. Expert Rev Anticancer Ther 2014; 9:545-51. [DOI: 10.1586/era.09.24] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kwiatkowska A, Nandhu MS, Behera P, Chiocca EA, Viapiano MS. Strategies in gene therapy for glioblastoma. Cancers (Basel) 2013; 5:1271-305. [PMID: 24202446 PMCID: PMC3875940 DOI: 10.3390/cancers5041271] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 10/15/2013] [Indexed: 01/01/2023] Open
Abstract
Glioblastoma (GBM) is the most aggressive form of brain cancer, with a dismal prognosis and extremely low percentage of survivors. Novel therapies are in dire need to improve the clinical management of these tumors and extend patient survival. Genetic therapies for GBM have been postulated and attempted for the past twenty years, with variable degrees of success in pre-clinical models and clinical trials. Here we review the most common approaches to treat GBM by gene therapy, including strategies to deliver tumor-suppressor genes, suicide genes, immunomodulatory cytokines to improve immune response, and conditionally-replicating oncolytic viruses. The review focuses on the strategies used for gene delivery, including the most common and widely used vehicles (i.e., replicating and non-replicating viruses) as well as novel therapeutic approaches such as stem cell-mediated therapy and nanotechnologies used for gene delivery. We present an overview of these strategies, their targets, different advantages, and challenges for success. Finally, we discuss the potential of gene therapy-based strategies to effectively attack such a complex genetic target as GBM, alone or in combination with conventional therapy.
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Affiliation(s)
- Aneta Kwiatkowska
- Department of Neurosurgery, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
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Ohka F, Natsume A, Wakabayashi T. Current trends in targeted therapies for glioblastoma multiforme. Neurol Res Int 2012; 2012:878425. [PMID: 22530127 PMCID: PMC3317017 DOI: 10.1155/2012/878425] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 10/21/2011] [Accepted: 12/07/2011] [Indexed: 12/21/2022] Open
Abstract
Glioblastoma multiforme (GBM) is one of the most frequently occurring tumors in the central nervous system and the most malignant tumor among gliomas. Despite aggressive treatment including surgery, adjuvant TMZ-based chemotherapy, and radiotherapy, GBM still has a dismal prognosis: the median survival is 14.6 months from diagnosis. To date, many studies report several determinants of resistance to this aggressive therapy: (1) O(6)-methylguanine-DNA methyltransferase (MGMT), (2) the complexity of several altered signaling pathways in GBM, (3) the existence of glioma stem-like cells (GSCs), and (4) the blood-brain barrier. Many studies aim to overcome these determinants of resistance to conventional therapy by using various approaches to improve the dismal prognosis of GBM such as modifying TMZ administration and combining TMZ with other agents, developing novel molecular-targeting agents, and novel strategies targeting GSCs. In this paper, we review up-to-date clinical trials of GBM treatments in order to overcome these 4 hurdles and to aim at more therapeutical effect than conventional therapies that are ongoing or are about to launch in clinical settings and discuss future perspectives.
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Affiliation(s)
- Fumiharu Ohka
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Atsushi Natsume
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Toshihiko Wakabayashi
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Abstract
Cytokines are a heterogeneous group of soluble small polypeptides or glycoproteins, which exert pleiotropic and redundant effects that promote growth, differentiation and activation of normal cells. Cytokines can have either pro- or anti-inflammatory activity and immunosuppressive activity, depending on the microenvironments. The tumor microenvironment consists of a variable combination of tumor cells, endothelial cells and infiltrating leukocytes, such as macrophages, T-lymphocytes, natural killer (NK) cells, B cells and antigen-presenting cells (APCs). Cytokine production acts as a means of communication in the tumor microenvironment. In this article, we review the cross-talk between cytokines in the tumor environment and the cytokine therapies that have been used till date for glioma treatment.
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12
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Monoclonal antibody therapy for malignant glioma. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 746:121-41. [PMID: 22639164 DOI: 10.1007/978-1-4614-3146-6_10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Monoclonal antibody (mAb) therapy is a rapidly evolving treatment immunotherapy modality for malignant gliomas. Many studies have provided evidence that the blood brain barrier-both at baseline and in the context of malignancy-is permissive for mAbs, thus providing a rationale for their use in treating intracranial malignancy. Furthermore, techniques such as convection enhanced delivery (CED) are being implemented to maximize exposure of tumor cells to mAb therapy. The mechanisms and designs of mAbs are widely varying, including unarmed immunoglobulins as well as immunoglobulins conjugated to radioisotopes, biological toxins, boronated dendrimers and immunoliposomes. The very structure of the immunoglobulin molecule has also been manipulated to generate a diverse armamentarium including single-chain Fv, bispecific T-cell engagers and chimeric antigen receptors. The targeted neutralization capacity of mAbs has been employed to modulate the immunologic milieu in hopes of optimizing other immunotherapy platforms. Many clinical trials have evaluated these mAb strategies to treat malignant gliomas, and the implementation of mAb therapy seems imminent and optimistic.
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13
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Understanding the role of cytokines in Glioblastoma Multiforme pathogenesis. Cancer Lett 2011; 316:139-50. [PMID: 22075379 DOI: 10.1016/j.canlet.2011.11.001] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 10/31/2011] [Accepted: 11/01/2011] [Indexed: 12/16/2022]
Abstract
Cytokines play a significant role in cancer diagnosis, prognosis and therapy. The immune system's failure to recognize the malignant tumor cells and mount an effective response may be the result of tumor-associated cytokine deregulation. Glioblastoma Multiforme (GBM) has a characteristic cytokine expression pattern, and abnormalities in cytokine expression have been implicated in gliomagenesis. Within the heterogeneous GBM microenvironment, the tumor cells, normal brain cells, immune cells, and stem cells interact with each other through the complex cytokine network. This review summarizes the current understanding of the functions of key cytokines on GBM, and highlights potential therapeutic applications targeting these cytokines.
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Iwami K, Natsume A, Wakabayashi T. Cytokine networks in glioma. Neurosurg Rev 2011; 34:253-63; discussion 263-4. [DOI: 10.1007/s10143-011-0320-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 12/18/2010] [Accepted: 01/28/2011] [Indexed: 12/25/2022]
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15
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Ho IAW, Hui KM, Lam PYP. Isolation of peptide ligands that interact specifically with human glioma cells. Peptides 2010; 31:644-50. [PMID: 20026365 DOI: 10.1016/j.peptides.2009.12.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2009] [Revised: 12/14/2009] [Accepted: 12/14/2009] [Indexed: 10/20/2022]
Abstract
Poor prognosis of high grade gliomas coupled with the difficulty of widespread delivery of therapeutic agents prompted the search into new molecular targets. Our aim is to isolate glioma-specific peptide sequences that can be used for targeted delivery of therapeutic drugs and imaging tracer to accurately demarcate tumor volume as a response to therapy. Herein, we describe the isolation and characterization of a glioma-specific peptide sequence, GL1, that interact exclusively with human glioma cells lines and primary glioma cells derived from human biopsy in vitro. Further analysis showed that the receptors for GL1 were located on the external side of the plasma membrane, where the GL1 peptides could bind stably up to a period of 180 min. More importantly, GL1 phages home specifically to human glioma xenograft when administered through tail vein, a phenomenon that was not observed when non-specific phages were used as control. Taken together, our results confirmed that GL1 could represent a novel peptide that target to tumor of glial origins, and could potentially be used as a targeting moiety for the conjugation of therapeutic drugs or diagnostic imaging radiolabels.
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Affiliation(s)
- Ivy A W Ho
- Laboratory of Cancer Gene Therapy, Singapore
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16
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Debinski W, Tatter SB. Convection-enhanced delivery for the treatment of brain tumors. Expert Rev Neurother 2009; 9:1519-27. [PMID: 19831841 DOI: 10.1586/ern.09.99] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The brain is highly accessible for nutrients and oxygen, however delivery of drugs to malignant brain tumors is a very challenging task. Convection-enhanced delivery (CED) has been designed to overcome some of the difficulties so that pharmacological agents that would not normally cross the BBB can be used for treatment. Drugs are delivered through one to several catheters placed stereotactically directly within the tumor mass or around the tumor or the resection cavity. Several classes of drugs are amenable to this technology including standard chemotherapeutics or novel experimental targeted drugs. The first Phase III trial for CED-delivered, molecularly targeted cytotoxin in the treatment of recurrent glioblastoma multiforme has been accomplished and demonstrated objective clinical efficacy. The lessons learned from more than a decade of attempts at exploiting CED for brain cancer treatment weigh critically for its future clinical applications. The main issues center around the type of catheters used, number of catheters and their exact placement; pharmacological formulation of drugs, prescreening patients undergoing treatment and monitoring the distribution of drugs in tumors and the tumor-infiltrated brain. It is expected that optimizing CED will make this technology a permanent addition to clinical management of brain malignancies.
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Affiliation(s)
- Waldemar Debinski
- Brain Tumor Center of Excellence, Comprehensive Cancer Center of Wake Forest University, Department of Neurosurgery, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
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17
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Wang R, Gan C, Gao W, He W, Wang X, Peng Y, Zhuo J, Tan J, Peng X, Wu J, Luo G. A novel recombinant immunotoxin with the smallest ribosome-inactivating protein Luffin P1: T-cell cytotoxicity and prolongation of allograft survival. J Cell Mol Med 2009; 14:578-86. [PMID: 19583807 PMCID: PMC3823457 DOI: 10.1111/j.1582-4934.2009.00840.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
In the creation of stable tolerance to MHC-incompatible allografts, reducing the large mass of donor-reactive cells via apoptosis is often required. Apoptosis induction by immunotoxins targeting surface molecules specifically presented on donor-reactive cytopathic T effector (Teff) cells is a promising strategy. Traditionally, the toxin moieties are bacterial exotoxins or plant-derived ribosome-inactivating proteins (RIPs) with large molecular size and strong immunogenicity, hence causing the problems of tissue penetration, host immune reaction and quick clearance. We have identified a novel class of small molecule RIPs (<10 kD) from the seeds of the plant Luffa cylindrica. The smallest member of this family, Luffin P1, has a molecular weight of 5226.8 Da, yet possessing a highly potent inhibitory activity on cell-free protein synthesis with IC50 of 0.88 nM. We now report a recombinant hIL-2-Luffin P1 immunotoxin, which strongly inhibited T-cell proliferation in mixed lymphocyte reaction and ConA response with IC50 of 1.8–10 nM. In vivo, hIL-2-Luffin P1 significantly prolonged the survival of major MHC-mismatched skin and kidney allografts in animal models. Thus, we demonstrate for the first time the efficacy of the smallest immunotoxin that could be further combined with other pharmacological and immunological reagents for synergistic control of pathogenic lymphocytes in immune-mediated diseases.
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Affiliation(s)
- Rupeng Wang
- Chongqing Key Lab for Diseases Proteomics, Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, China
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Djedid R, Kiss R, Lefranc F. Targeted therapy of glioblastomas: a 5-year view. ACTA ACUST UNITED AC 2009. [DOI: 10.2217/thy.09.12] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Abstract
The development of effective immunotherapy strategies for glioma requires adequate understanding of the unique immunological microenvironment in the central nervous system (CNS) and CNS tumors. Although the CNS is often considered to be an immunologically privileged site and poses unique challenges for the delivery of effector cells and molecules, recent advances in technology and discoveries in CNS immunology suggest novel mechanisms that may significantly improve the efficacy of immunotherapy against gliomas. In this review, we first summarize recent advances in the CNS and CNS tumor immunology. We address factors that may promote immune escape of gliomas. We also review advances in passive and active immunotherapy strategies for glioma, with an emphasis on lessons learned from recent early-phase clinical trials. We also discuss novel immunotherapy strategies that have been recently tested in non-CNS tumors and show great potential for application to gliomas. Finally, we discuss how each of these promising strategies can be combined to achieve clinical benefit for patients with gliomas.
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Affiliation(s)
- Hideho Okada
- Brain Tumor Program, University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213, USA.
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