NeoPHOEBE: Neoadjuvant Trastuzumab + BKM120 in Combination With Weekly Paclitaxel in HER2-positive Primary Breast Cancer

Neo-adjuvant BKM120 (oral pan-class I PI3K inhibitor, continuous daily dosing). BKM120 was administered orally 100 mg/day.

Trastuzumab is a humanized monoclonal antibody directed against the extracellular juxtamembrane domain of the HER2 receptor. Administered 4mg/kg i.v. load followed by 2mg/kg i.v. weekly.

Paclitaxel is a cytotoxic agent with proven antitumor activity in a variety of solid tumors. The antitumor activity of paclitaxel is based on tubulin-binding and stabilization of non-functional microtubule bundles, thereby blocking normal mitotic spindle development and subsequent cell division. Administered weekly 80mg/m2 i.v.

Neoadjuvant BKM120 placebo Administered orally 100 mg/day.