Abstract:Background: Margetuximab (M) has demonstrated anti-tumor activity in patients with advanced HER2+ gastric cancer and PFS superiority to trastuzumab (T) in pre-treated metastatic HER2+ breast cancer patients (1). Similar to T, M inhibits HER2 signaling; additionally, M enhances engagement with the activating Fcγ receptor (FcR)IIIA, while diminishing interaction with the inhibitory FcRIIB. Given the role of FcRs in coupling innate and adaptive immune responses, clinical studies of M in combination with PD-1 or P… Show more
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