NCIt definition : A synthetic quinolone derivative and dual kinase inhibitor that targets both Abl and
Src kinases with potential antineoplastic activity. Unlike imatinib, bosutinib inhibits
the autophosphorylation of both Abl and Src kinases, resulting in inhibition of cell
growth and apoptosis. Because of the dual mechanism of action, this agent may have
activity in resistant CML disease, other myeloid malignancies and solid tumors. Abl
kinase is upregulated in the presence of the abnormal Bcr-abl fusion protein which
is commonly associated with chronic myeloid leukemia (CML). Overexpression of specific
Src kinases is also associated with the imatinib-resistant CML phenotype.;