CLEOPATRA: a phase III evaluation of pertuzumab and trastuzumab for HER2-positive metastatic breast cancer by Baselga José, Swain Sandra M in Clinical breast cancer (2010). PubMed

Abstract

Patients with human epidermal growth factor receptor 2 (HER2)-positive breast cancer have a poor prognosis. Despite proven efficacy with the standard of care, trastuzumab, most patients with HER2-positive metastatic breast cancer (MBC) will eventually progress, requiring further intervention to prolong life. Pertuzumab, a humanized monoclonal antibody, is the first HER2 dimerization inhibitor. It binds to the dimerization site on the HER2 domain and prevents ligand-driven pairing of HER2 with other HER receptors, thus inhibiting tumor cell growth and survival. Combining trastuzumab and pertuzumab therefore provides a more comprehensive blockade of the HER signaling pathways, resulting in greater antitumor efficacy.

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