Neural tumors such as glioblastoma (GBM) remain amongst tlie most difficult to treat. We have been interested in using oncolytic viruses, based on herpes simplex virus type 1 (HSV-1), as a selective nervous system tumor-killing virus. Considerable effort in the vector development resulted in the engineering of oncolytic HSV vectors (oHSV) such rQNestin34.5 that are non-toxic for normal cells, yet capable of selective replication in GBM tumor cells. In order to effectively use oHSV in animal tumor models it is necessary to propagate and purify oHSV to high titers. Efforts in process development have resulted in scalable systems capable of manufacturing rQNestin34.5 and other oHSVs. My laboratory has spent considerable time developing refined and novel methodologies to improve virus production, purification and quality assessment to provide high quality vector stocks with dramatically reduced levels of protein and DNA contaminants (>99% removal) that can contribute to toxicity, immunity and biodistribution as well as confound in vivo efficacy studies. Our efforts in process development have resulted in scalable systems capable of manufacturing these vectors for pre-clinical efficacy and safety testing resulting in a 10 to 30-fold increase in overall virus yield and a corresponding 60-fold increase in concentration of the virus. The Core is in the unique position of being one of a few sites for oHSV virus vector production, purification and quality assessment testing. This extensive expertise along with our prior collaborative interaction with the projects (33 oHSV vector stocks produced and distributed since October 2007) supports the overall success ofthe current proposal. The primary goal of the oHSV Production Core is to provide large quantities of GLP-grade concentrated and purified oHSV vectors: (i) rQNestin34.5 for Aims 1 &3 of Project 2, Aim 1-3 of Project 3, and Aims 1-3 of Project 4;(ii) transductional retargeted/miR-regulated oHSV vectors engineered in Aims 1-3 of Project 1, or (iii) ChaseABC armed versions of rQNestin34.5 for Aims 1-3 of Project 3 or the ChaseABC-armed retargeted vector engineered in for Aim 2-3 of Project 3. The oHSV Production Core m work with the projects to provide optimal vector quantity and purity while providing the support necessary to,successfully exploit the available technology. We will continue to refine our production, purification and assessment systems. Should any of the engineered oHSV vectors tested in the projects prove efficacious, the Core would provide support to cGMP facilities for transfer of the production/purification technology of large-scale oHSV manufacture for possible Phase-1 human clinical trials.
The ACS predicts there will be >12,000 deaths/yr from brain cancer. Oncolytic Herpes Simplex Virus (oHSV) therapy has shown some promise. The goal ofthe POl is to improve on this process. Doing so requires hightiter purified stocks, consistently grown and purified by one lab otherwise considerable variation in purity, stability, sterility and identity occurs. Core B will provide the projects with highly purified oHSV stocks based on the detailed protocols we have developed for oHSV production, purification and quality assessment.
|Saini, Uksha; Naidu, Shan; ElNaggar, Adam C et al. (2017) Elevated STAT3 expression in ovarian cancer ascites promotes invasion and metastasis: a potential therapeutic target. Oncogene 36:168-181|
|Jaime-Ramirez, Alena Cristina; Dmitrieva, Nina; Yoo, Ji Young et al. (2017) Humanized chondroitinase ABC sensitizes glioblastoma cells to temozolomide. J Gene Med 19:|
|Chen, L; Mao, H; Zhang, J et al. (2017) Targeting FLT3 by chimeric antigen receptor T cells for the treatment of acute myeloid leukemia. Leukemia 31:1830-1834|
|Choudhury, Sourav R; Hudry, Eloise; Maguire, Casey A et al. (2017) Viral vectors for therapy of neurologic diseases. Neuropharmacology 120:63-80|
|Freud, Aharon G; Mundy-Bosse, Bethany L; Yu, Jianhua et al. (2017) The Broad Spectrum of Human Natural Killer Cell Diversity. Immunity 47:820-833|
|Lee, Tae Jin; Yoo, Ji Young; Shu, Dan et al. (2017) RNA Nanoparticle-Based Targeted Therapy for Glioblastoma through Inhibition of Oncogenic miR-21. Mol Ther 25:1544-1555|
|Jaime-Ramirez, Alena C; Yu, Jun-Ge; Caserta, Enrico et al. (2017) Reolysin and Histone Deacetylase Inhibition in the Treatment of Head and Neck Squamous Cell Carcinoma. Mol Ther Oncolytics 5:87-96|
|Huang, Tianzhi; Kim, Chung Kwon; Alvarez, Angel A et al. (2017) MST4 Phosphorylation of ATG4B Regulates Autophagic Activity, Tumorigenicity, and Radioresistance in Glioblastoma. Cancer Cell 32:840-855.e8|
|Bolyard, Chelsea; Meisen, W Hans; Banasavadi-Siddegowda, Yeshavanth et al. (2017) BAI1 Orchestrates Macrophage Inflammatory Response to HSV Infection-Implications for Oncolytic Viral Therapy. Clin Cancer Res 23:1809-1819|
|Dai, Hong-Sheng; Griffin, Nathaniel; Bolyard, Chelsea et al. (2017) The Fc Domain of Immunoglobulin Is Sufficient to Bridge NK Cells with Virally Infected Cells. Immunity 47:159-170.e10|
Showing the most recent 10 out of 107 publications