The ultimate goal of this proposal is to evaluate the changes induced in the tumor microenvironment upon treatment with oncolytic viruses (OV) and assess how these changes impact OV therapy. These results will lead to a better understanding of OV therapy induced changes in tumor biology and will lead to the development of a dually armed cancer killing OV. OV treatment of tumors relies on cancer-specific replication of the virus leading to tumor destruction with minimal toxicity to adjacent non-neoplastic tissue. Results from six clinical trials using replication competent OVs to treat patients with malignant gliomas have shown the new modality to be relatively safe, but high expectations of efficacy remain unmet (1, 2). The tumor's microenvironment is increasingly recognized as an important determinant for its progression and its response to therapeutics. We are investigating changes in the tumor microenvironment following oncolytic viral (OV) therapy, with the ultimate goal to devise better treatment strategies to combat brain tumors. My laboratory has been investigating changes in the tumor secreted angiotome (secreted angiogenic proteins) after OV therapy. In our preliminary studies, we have uncovered a significant increase in a secreted protein implicated in increased tumor proliferation, angiogenesis and resistance to chemotherapy. Its expression is correlated as a negative prognostic marker for gliomas, prostate, and breast cancer. Apart from its effect on tumor progression, our preliminary results indicate that it may also contribute to the development of resistance of glioma cells to OV infection in subsequent rounds of replication. In this grant proposal we will validate our findings of its induction in glioma with multiple different oncolytic viruses. We will further evaluate the effect of this protein on OV infection, and will finally construct and test an OV that can overcome the induction of this protein. PROJECT NARRATIVE: The American Cancer Society predicts that there will be 12, 740 deaths due to cancers of the brain/nervous system. Despite decades of research prognosis for patients suffering from malignant gliomas remains poor. Oncolytic viral therapy is an experimental treatment which is currently being evaluated in clinical trials for efficacy against brain tumors. The proposed research outlined in this grant is highly significant because it will elucidate the changes in tumor biology upon oncolytic viral therapy. The results will advance our understanding of changes in tumor biology upon treatment with oncolytic viruses. This will help translate oncolytic viral therapy into an efficacious treatment for tumors.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS064607-04
Application #
8130936
Study Section
Special Emphasis Panel (ZRG1-ONC-K (05))
Program Officer
Fountain, Jane W
Project Start
2008-08-01
Project End
2013-07-31
Budget Start
2011-08-01
Budget End
2012-07-31
Support Year
4
Fiscal Year
2011
Total Cost
$312,375
Indirect Cost
Name
Ohio State University
Department
Neurosurgery
Type
Schools of Medicine
DUNS #
832127323
City
Columbus
State
OH
Country
United States
Zip Code
43210
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Russell, Luke; Swanner, Jessica; Jaime-Ramirez, Alena Cristina et al. (2018) PTEN expression by an oncolytic herpesvirus directs T-cell mediated tumor clearance. Nat Commun 9:5006
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Jaime-Ramirez, Alena Cristina; Dmitrieva, Nina; Yoo, Ji Young et al. (2017) Humanized chondroitinase ABC sensitizes glioblastoma cells to temozolomide. J Gene Med 19:
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
Quispe Calla, N E; Vicetti Miguel, R D; Boyaka, P N et al. (2016) Medroxyprogesterone acetate and levonorgestrel increase genital mucosal permeability and enhance susceptibility to genital herpes simplex virus type 2 infection. Mucosal Immunol 9:1571-1583
Barth, Rolf F; Wu, Gong; Meisen, W Hans et al. (2016) Design, synthesis, and evaluation of cisplatin-containing EGFR targeting bioconjugates as potential therapeutic agents for brain tumors. Onco Targets Ther 9:2769-81

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