Asparaginase
Hydrolyzes serum asparagine, depriving tumor cells of the asparagine necessary for protein synthesis, leading to cell death.
Hydroxyurea
inhibits ribonucleotide reductase and leads to depletion of deoynuceloside triphosphate pools. DNA synthesis is thereby inhibited. Kills cells in S phase and is given orally.
Interferon-alpha
approved for hairy cell leukemia, CML, malignant melanoma, and Kaposi’s sarcoma (endothelial tumor caused by HHV-8 virus.