IMP321 (Eftilagimod Alpha) as Adjunctive to a Standard Chemotherapy Paclitaxel Metastatic Breast Carcinoma

This is a multicentre, placebo-controlled, double-blind, 1:1 randomised Phase IIb study in female hormone receptor-positive metastatic breast cancer patients. The study comprises of two stages. Stage 1 is the open-label, safety run-in stage consisting of cohort 1 and 2 to confirm the (RPTD) of IMP321 in combination with paclitaxel. Stage 2 is placebo-controlled, double-blind randomisation stage, paclitaxel + IMP321 at the RPTD will be compared to paclitaxel + placebo.