Abstract

We tested an experimental strategy to decrease the dose-limiting hematotoxicity of carboplatin without compromising its activity against brain tumors. The effect of pretreatment with WR-1065, a chemomodifier that penetrates brain poorly, on carboplatin's cytotoxicity was evaluated in human hematopoietic granulocyte-monocyte progenitor cells and in three human glioblastoma cell lines. WR-1065 reduced bone marrow toxicity without decreasing carboplatin's activity against glioblastoma cells. These results suggest that the therapeutic index of carboplatin might be increased in the treatment of malignant brain tumors.

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