The goal of this proposal is to develop improved oncolytic herpesviral vectors (oHSV) for the treatment of glioblastomas (GBM), a deadly cancer of the nervous system for which adequate therapy remains elusive Oncolytic viruses derive their anti-cancer activity from their ability to lyse cancer cells and spread within the tumor while sparing normal cells. Their selectivity for cancer cells is generally based on natural or engineered defects in the viral genome that inactivate key replication functions in normal cells but are complemented by the abnormal environment within cancer cells. HSV is an attractive vector for oncolytic therapy for tumors of the nervous system because of its natural neurotropism, high lytic activity, well-defined life cycle controlled by two essential genes, and capacity to deliver multiple exogenous anti-cancer protein products to enhance their efficacy. Clinical trials of current oncolytic HSV (oHSV) have demonstrated safety but limited efficacy, due in part to barriers examined by each of the projects of this program grant. Our study seeks to take advantage of new vector engineering technologies to achieve greater replication efficiency and oHSV spread within the tumor without compromising safety. We hypothesize that restricting oHSV infection to tumor cells by engineering steps referred to as retargeting, combined with measures to block virus replication in normal cells based on signature differences in microRNA expression profiles between normal and cancer cells, will provide a new generation of oHSVs that will prove both highly effective and safe.
In Aim 1, we will redirect oHSV infectivity to glioblastoma cells by viral envelope engineering and in collaboration with Project 2-3, test, the effect of HDAC inhibition and virus-mediated ectopic chondroitinase expression on oHSV distribution and spread.
In Aim 2, we will install genetic elements in the oHSV that will allow replication exclusively in glioblastoma cells as a function of the unique microRNA signatures of these cells.
In Aim 3, animal experiments will be performed to test the safety and efficacy of selected oHSVs that combine key features from the first two aims. With potential further improvements based on feedback from all other projects of this program, we expect that we will engineer a promising new generation of oHSV for evaluation in clinical trials.

Public Health Relevance

Clinical trials with conditionally-replicating herpesviruses (oHSV) for the treatment of glioblastoma multiforme have shown safety without consistent evidence of efficacy. This project, in close collaboration with Projects 2 and 3, seeks to address deficiencies in oHSV lytic activity and spread while ensuring safety by a combination of novel engineering steps that will eliminate the need for attenuating mutations in the viral genome, facilitate oHSV dissemination, and provide a possible solution for inefficient oHSV entry into glioblastoma cells.

Agency
National Institute of Health (NIH)
Type
Research Program Projects (P01)
Project #
5P01CA163205-02
Application #
8694514
Study Section
Special Emphasis Panel (ZCA1)
Project Start
Project End
Budget Start
Budget End
Support Year
2
Fiscal Year
2014
Total Cost
Indirect Cost
Name
Ohio State University
Department
Type
DUNS #
City
Columbus
State
OH
Country
United States
Zip Code
Ouchi, Rie; Okabe, Sachiko; Migita, Toshiro et al. (2016) Senescence from glioma stem cell differentiation promotes tumor growth. Biochem Biophys Res Commun 470:275-81
Huang, Tianzhi; Alvarez, Angel A; Pangeni, Rajendra P et al. (2016) A regulatory circuit of miR-125b/miR-20b and Wnt signalling controls glioblastoma phenotypes through FZD6-modulated pathways. Nat Commun 7:12885
Chen, Xilin; Han, Jianfeng; Chu, Jianhong et al. (2016) A combinational therapy of EGFR-CAR NK cells and oncolytic herpes simplex virus 1 for breast cancer brain metastases. Oncotarget 7:27764-77
Cheng, Peng; Wang, Jia; Waghmare, Indrayani et al. (2016) FOXD1-ALDH1A3 Signaling Is a Determinant for the Self-Renewal and Tumorigenicity of Mesenchymal Glioma Stem Cells. Cancer Res 76:7219-7230
Ricklefs, Franz; Mineo, Marco; Rooj, Arun K et al. (2016) Extracellular Vesicles from High-Grade Glioma Exchange Diverse Pro-oncogenic Signals That Maintain Intratumoral Heterogeneity. Cancer Res 76:2876-81
Goins, William F; Hall, Bonnie; Cohen, Justus B et al. (2016) Retargeting of herpes simplex virus (HSV) vectors. Curr Opin Virol 21:93-101
Yoo, Ji Young; Jaime-Ramirez, Alena Cristina; Bolyard, Chelsea et al. (2016) Bortezomib Treatment Sensitizes Oncolytic HSV-1-Treated Tumors to NK Cell Immunotherapy. Clin Cancer Res 22:5265-5276
Freud, Aharon G; Keller, Karen A; Scoville, Steven D et al. (2016) NKp80 Defines a Critical Step during Human Natural Killer Cell Development. Cell Rep 16:379-91
Xiao, Run; Bergin, Stephen M; Huang, Wei et al. (2016) Environmental and Genetic Activation of Hypothalamic BDNF Modulates T-cell Immunity to Exert an Anticancer Phenotype. Cancer Immunol Res 4:488-97
Kim, Sung-Hak; Ezhilarasan, Ravesanker; Phillips, Emma et al. (2016) Serine/Threonine Kinase MLK4 Determines Mesenchymal Identity in Glioma Stem Cells in an NF-κB-dependent Manner. Cancer Cell 29:201-13

Showing the most recent 10 out of 80 publications