NCIt definition : An orally available inhibitor of Bruton's tyrosine kinase (BTK) with potential antineoplastic
activity. Upon administration, fenebrutinib inhibits the activity of BTK and prevents
the activation of the B-cell antigen receptor (BCR) signaling pathway. This prevents
both B-cell activation and BTK-mediated activation of downstream survival pathways,
which leads to the inhibition of the growth of malignant B-cells that overexpress
BTK. BTK, a member of the Src-related BTK/Tec family of cytoplasmic tyrosine kinases,
is overexpressed in B-cell malignancies; it plays an important role in B-lymphocyte
development, activation, signaling, proliferation and survival.;