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CRAdRGDflt-IL24 virotherapy in combination with chemotherapy of experimental glioma

Abstract

Malignant forms of glioma, the most common primary brain tumors, remain poorly responsive to multimodality therapeutic interventions, including chemotherapy. Suppressed apoptosis and extraordinary invasiveness are important distinctive features that contribute to the malignant phenotype of glioma. We have developed the vascular endothelial growth factor receptor 1 (VEGFR-1/flt-1) conditional replicating adenoviral vector (CRAdRGDflt-IL24) encoding the interleukin-24 (IL-24) gene. We investigated whether a combination of CRAdRGDflt-IL24-mediated oncolytic virotherapy and chemotherapy using temozolomide (TMZ) produces increased cytotoxicity against human glioma cells in comparison with these agents alone. Combination of CRAdRGDflt-IL24 and TMZ significantly enhanced cytotoxicity in vitro, inhibited D54MG tumor growth and prolonged survival of mice harboring intracranial human glioma xenografts in comparison with CRAdRGDflt-IL24 or TMZ alone. These data indicate that combined treatment with CRAdRGDflt-IL24-mediated oncolytic virotherapy and TMZ chemotherapy provides a promising approach for glioma therapy.

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Acknowledgements

We thank Sally B Lagan for assistance in preparing the paper. Supported in part by NCI SPORE in Brain Cancer Grant P50 CA97247.

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Correspondence to S A Kaliberov.

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Kaliberova, L., Krendelchtchikova, V., Harmon, D. et al. CRAdRGDflt-IL24 virotherapy in combination with chemotherapy of experimental glioma. Cancer Gene Ther 16, 794–805 (2009). https://doi.org/10.1038/cgt.2009.23

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