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Pol JG, Acuna SA, Yadollahi B, Tang N, Stephenson KB, Atherton MJ, Hanwell D, El-Warrak A, Goldstein A, Moloo B, Turner PV, Lopez R, LaFrance S, Evelegh C, Denisova G, Parsons R, Millar J, Stoll G, Martin CG, Pomoransky J, Breitbach CJ, Bramson JL, Bell JC, Wan Y, Stojdl DF, Lichty BD, McCart JA. Preclinical evaluation of a MAGE-A3 vaccination utilizing the oncolytic Maraba virus currently in first-in-human trials. Oncoimmunology 2018; 8:e1512329. [PMID: 30546947 PMCID: PMC6287790 DOI: 10.1080/2162402x.2018.1512329] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 08/09/2018] [Accepted: 08/10/2018] [Indexed: 12/19/2022] Open
Abstract
Multiple immunotherapeutics have been approved for cancer patients, however advanced solid tumors are frequently refractory to treatment. We evaluated the safety and immunogenicity of a vaccination approach with multimodal oncolytic potential in non-human primates (NHP) (Macaca fascicularis). Primates received a replication-deficient adenoviral prime, boosted by the oncolytic Maraba MG1 rhabdovirus. Both vectors expressed the human MAGE-A3. No severe adverse events were observed. Boosting with MG1-MAGEA3 induced an expansion of hMAGE-A3-specific CD4+ and CD8+ T-cells with the latter peaking at remarkable levels and persisting for several months. T-cells reacting against epitopes fully conserved between simian and human MAGE-A3 were identified. Humoral immunity was demonstrated by the detection of circulating MAGE-A3 antibodies. These preclinical data establish the capacity for the Ad:MG1 vaccination to engage multiple effector immune cell populations without causing significant toxicity in outbred NHPs. Clinical investigations utilizing this program for the treatment of MAGE-A3-positive solid malignancies are underway (NCT02285816, NCT02879760).
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Affiliation(s)
- Jonathan G Pol
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Sergio A Acuna
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
| | - Beta Yadollahi
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
| | - Nan Tang
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
| | | | - Matthew J Atherton
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - David Hanwell
- Animal Resources Centre, University Health Network, Toronto, ON, Canada
| | | | - Alyssa Goldstein
- Animal Resources Centre, University Health Network, Toronto, ON, Canada
| | - Badru Moloo
- Animal Resources Centre, University Health Network, Toronto, ON, Canada
| | - Patricia V Turner
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada
| | - Roberto Lopez
- Animal Resources Centre, University Health Network, Toronto, ON, Canada
| | - Sandra LaFrance
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
| | - Carole Evelegh
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Galina Denisova
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Robin Parsons
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Jamie Millar
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Gautier Stoll
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France.,Sorbonne Universités/Université Pierre et Marie Curie, Paris, France
| | | | | | | | - Jonathan L Bramson
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - John C Bell
- Turnstone Biologics, Ottawa, ON, Canada.,Ottawa Health Research Institute, Ottawa, ON, Canada
| | - Yonghong Wan
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - David F Stojdl
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada.,Turnstone Biologics, Ottawa, ON, Canada
| | - Brian D Lichty
- McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada.,Turnstone Biologics, Ottawa, ON, Canada
| | - J Andrea McCart
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada.,Department of Surgery, Mount Sinai Hospital and University of Toronto, Toronto, Canada
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Vertel BM, Velasco A, LaFrance S, Walters L, Kaczman-Daniel K. Precursors of chondroitin sulfate proteoglycan are segregated within a subcompartment of the chondrocyte endoplasmic reticulum. J Biophys Biochem Cytol 1989; 109:1827-36. [PMID: 2677030 PMCID: PMC2115806 DOI: 10.1083/jcb.109.4.1827] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Immunocytochemical methods were used at the levels of light and electron microscopy to examine the intracellular compartments of chondrocytes involved in extracellular matrix biosynthesis. The results of our studies provide morphological evidence for the compartmentalization of secretory proteins in the ER. Precursors of the large chondroitin sulfate proteoglycan (CSPG), the major proteoglycan species produced by chondrocytes, were present in the Golgi complex. In addition, CSPG precursors were localized in specialized regions of the ER. Link protein, a separate gene product which functions to stabilize extracellular aggregates of CSPG monomers with hyaluronic acid, was segregated similarly. In contrast, type II procollagen, another major secretory molecule produced by chondrocytes, was found homogeneously distributed throughout the ER. The CSPG precursor-containing ER compartment exhibits a variable tubulo-vesicular morphology but is invariably recognized as an electronlucent, smooth membrane-bounded region continuous with typical ribosome-studded elements of the rough ER. The observation that this ER structure does not stain with antibodies against resident ER proteins also suggests that the compartment is a specialized region distinct from the main part of the ER. These results support recent studies that consider the ER as a compartmentalized organelle and are discussed in light of the possible implications for proteoglycan biosynthesis and processing.
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Affiliation(s)
- B M Vertel
- Department of Cell Biology and Anatomy, University of Health Sciences, Chicago Medical School, Illinois 60064
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