Abstract
N,N'-bis(2-hydroxyethyl)-N-nitrosourea (BCNU) is a commonly used agent for treatment of malignant gliomas. The mechanisms of cell death and the role of Bcl-2 and Bax in a BCNU-treated rat glioma cell line were investigated. Our results indicate that apoptosis occurs only at a high concentration of BCNU with elevated levels of Bax and a reversed ratio of Bax/Bcl-2. Overexpression of Bax delivered by a herpes simplex viral vector in combination with BCNU chemotherapy enhanced the efficacy of BCNU in a rat glioma model. These findings suggest that conventional treatment with BCNU may be combined with gene therapy that delivers a bax gene into the glioma cells to achieve a high level of Bax, facilitating BCNU-induced cytotoxicity.
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