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MacroGenics looks to future with breast cancer drug margetuximab

June 03, 2019 / Richard Staines
SHARESHARESHARE

A small biotech, MacroGenics, took the market by surprise earlier this year with some surprising data from its margetuximab essentially a tweaked version of Roche’s Herceptin (trastuzumab) where a few amino acid mutations are enough to produce a stronger cellular response to cancer.CEO Scott Koenig has been doing the rounds at the American Society of Clinical Oncology (ASCO) conference in Chicago following release of detailed data from the SOPHIA trial of margetuximab in breast cancer patients who have previously been treated with Herceptin and other similar medicines.In SOPHIA, the median progression-free survival (PFS) of patients treated with margetuximab and chemotherapy was 5.8 months compared to 4.9 months in patients treated with trastuzumab and chemotherapy.Among the approximately 85% of patients carrying the CD16A 158F allele, a pre-specified exploratory subpopulation in the study, PFS was prolonged by 1.8 months in the margetuximab arm compared to the trastuzumab arm (6...