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Cheema, Tooba A

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Cheema

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Tooba A

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Cheema, Tooba A
Author's Publications: search.filters.isAuthorOfPublication.0457fb8c-d1f2-4248-878b-c177279db0f7

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    Combination of vinblastine and oncolytic herpes simplex virus vector expressing IL-12 therapy increases antitumor and antiangiogenic effects in prostate cancer models
    (2013) Passer, Brent J.; Cheema, Tooba A; Wu, Shulin; Wu, Chen-lee; Rabkin, Samuel; Martuza, Robert
    Oncolytic herpes simplex virus-1 (oHSV)–based vectors selectively replicate in tumor cells causing direct killing, ie., oncolysis, while sparing normal cells. oHSV’sare promising anticancer agents, but their efficacy, when used as single agents, leaves room for improvement. We hypothesized that combining the direct oncolytic and antiangiogenic activities of the IL-12 secreting NV1042 oHSV with microtubule disrupting agents (MDA’s) would be an effective means to enhance antitumor efficacy. Vinblastine (VB) was identified among several MDA’s screened that displayed consistent and potent cytotoxic killing of both prostate cancer and endothelial cell lines. In matrigel tube forming assays, VB was found to be highly effective at inhibiting tube formation of HUVEC cells. The combination of VB with NV1023 (the parental virus lacking IL-12) or NV1042 showed additive or synergistic activity against prostate cancer cell lines and was not due to increased oHSV replication by VB. In athymic mice bearing CWR22 prostate tumors, VB in combination with NV1042 was superior to the combination of VB plus NV1023 in reducing tumor burden, appeared to be nontoxic and resulted in a statistically significant diminution in the number of CD31+ cells as compared to other treatment groups. In human organotypic cultures using surgical samples from radical prostatectomies, both NV1023 and NV1042 were localized specifically to the epithelial cells of prostatic glands but not to the surrounding stroma. These data highlight the therapeutic advantage of combining the dual-acting anti-tumor and anti-angiogenic activities of oHSV’s and MDA’s.
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    Immunovirotherapy for the treatment of glioblastoma
    (Landes Bioscience, 2014) Cheema, Tooba A; Fecci, Peter; Ning, Jianfang; Rabkin, Samuel
    We have recently described a new murine model of glioblastoma, generated by the implantation of syngeneic glioblastoma stem cells into immunocompetent mice, that recapitulates the salient histopathological and immunological features of the human disease. We employed this model to demonstrate the multifaceted activity of an oncolytic herpes simplex virus genetically modified to express interleukin-12, G47∆-IL12.