First patient dosed in Ph 3 trial HLX22-GC-301 of HLX22 in combination with trastuzumab and chemo in 1L HER2+ve advanced G/GEJ cancer patients
“HLX22-GC-301 is a double-blind, randomized, controlled multicenter phase 3 study aims to compare the efficacy and safety of HLX22 in combination with trastuzumab and chemotherapy versus trastuzumab and chemotherapy with or without pembrolizumab as first-line treatment in patients with human epidermal growth factor receptor 2 (HER2)-positive, locally advanced or metastatic gastric/gastroesophageal junction cancer. Eligible participants will be randomized at 1:1 to the experimental arm (treated with HLX22 (15 mg/kg, intravenous injection) plus trastuzumab and chemotherapy) or the control group (placebo plus trastuzumab and chemotherapy with or without pembrolizumab). The primary endpoints of this study are progression-free survival (PFS) accessed by independent radiology review committee (IRRC) per RECIST 1.1 and overall survival (OS), the secondary endpoints include investigator-assessed PFS, IRRC or investigator-accessed objective response rate (ORR), PFS2, duration of response (DOR), quality of life, safety, immunogenicity, and pharmacokinetic characteristics.”
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