NCIt definition : An orally bioavailable synthetic small molecule-inhibitor of SRC-family protein-tyrosine
kinases. Dasatinib binds to and inhibits the growth-promoting activities of these
kinases. Apparently because of its less stringent binding affinity for the BCR-ABL
kinase, dasatinib has been shown to overcome the resistance to imatinib of chronic
myeloid leukemia (CML) cells harboring BCR-ABL kinase domain point mutations. SRC-family
protein-tyrosine kinases interact with variety of cell-surface receptors and participate
in intracellular signal transduction pathways; tumorigenic forms can occur through
altered regulation or expression of the endogenous protein and by way of virally-encoded
kinase genes.;