Pertuzumab protects the achilles' heel of trastuzumab--emtansine.

Gwin, William R; Spector, Neil L · Clin Cancer Res · 2014

basic_science · Level V

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Abstract

Trastuzumab emtansine (T-DM1) represents a significant advancement in the treatment of HER2(+) breast cancers. Its clinical efficacy however will be limited by the development of therapeutic resistance. In this report, the HER3 ligand neuregulin is shown to mediate T-DM1 resistance, which was overcome by administration of pertuzumab, a steric inhibitor of HER2 dimerization.

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