Definition / meaning of m-azidopyrimethamine

An antifolate derived from diaminopyrimidine with cytotoxic properties. With a mechanism of action similar to that of methotrexate (MTX), m-azidopyrimethamine blocks tetrahydrofolate synthesis, resulting in depletion of nucleotide precursors and inhibition of DNA, RNA and protein synthesis. This agent is more lipophilic but less potent than MTX.

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The Web site of the National Cancer Institute (http://www.cancer.gov/)

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