NCIt definition : An orally bioavailable small molecule Src kinase inhibitor with potential antineoplastic
activity. Unlike other Src kinase inhibitors which bind to the ATP-binding site, tirbanibulin
specifically binds to the peptide substrate binding site of Src kinase; inhibition
of kinase activity may result in the inhibition of primary tumor growth and the suppression
of metastasis. Src tyrosine kinases are upregulated in many tumor cells and play important
roles in tumor cell proliferation and metastasis.;
Alternative definition : NCI-GLOSS: A substance being studied in the treatment of cancer. KX2-391 blocks an
enzyme needed for growth of cells and may kill cancer cells. It is a type of Src kinase
inhibitor.;