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Antifolate Activity of Pyrimethamine Enhances Temozolomide-Induced Cytotoxicity in Melanoma Cells
Molecular Cancer Research, 05/15/09
Chen M et al. - The increase in cell death due to combination treatment was rescued by leucovorin. Other folate antagonists were also effective enhancers of temozolomide-induced cytotoxicity, and the effects of antifolates were also evident in gliomas.Screening approach led to the identification of Pyrimethamine, an orally available drug that efficiently crosses the blood-brain barrier, as a potent enhancer of the efficacy of temozolomide as an antineoplastic agent via inhibition of folate metabolism.
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