• A phase II trial of HER-Vaxx plus chemotherapy demonstrated a 40% survival benefit compared to chemotherapy alone in patients with HER2-overexpressing gastric cancer.
• The HER-Vaxx vaccine induced strong HER2-specific IgG and IgG1 antibody responses, correlating with tumor reduction and inhibition of intracellular phosphorylation.
• The vaccine's mechanism of action includes antibody-dependent cellular cytotoxicity (ADCC) and counteraction of immune tolerance effects, enhancing chemotherapy's impact.
• The study suggests HER-Vaxx is safe and immunogenic, warranting further evaluation in larger trials and combination therapies for advanced gastric cancer.