NCIt definition : A fully human monoclonal antibody directed against the human epidermal growth factor
receptor ErbB3 (Her3) with potential antineoplastic activity. Seribantumab binds to
and inhibits ErbB3 activation, which may result in inhibition of ErbB3-dependent PI3K/Akt
signaling and so inhibition of cellular proliferation and differentiation. ErbB3,
a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine
kinases, is frequently overexpressed in solid tumors, including breast, lung, and
colorectal tumors of epithelial origin; it has no active kinase domain itself but
is activated through heterodimerization with other members of the EGFR receptor family
that do.;