On November 18, 2019 Zymeworks Inc. (NYSE: ZYME), a clinical-stage biopharmaceutical company developing multifunctional therapeutics, reported the selection of an abstract highlighting updated single agent data from the Phase 1 clinical trial evaluating the HER2-targeted bispecific antibody, ZW25, in patients with HER2-expressing solid tumors for a mini oral presentation at the ESMO (Free ESMO Whitepaper) Asia 2019 Congress, taking place November 22 – 24 in Singapore (Press release, Zymeworks, NOV 18, 2019, View Source [SID1234551427]).
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The presentation, entitled "Safety, Anti-Tumor Activity, and Biomarker Results of the HER2-Targeted Bispecific Antibody ZW25 in HER2-Expressing Solid Tumors," is scheduled for Friday November 22 at 3:30 pm SGT (local Singapore Time) during the mini oral session Developmental and Precision Medicine in room 311. The presentation number is 61O.
About the Phase 1 Clinical Trial
Zymeworks’ Phase 1 study has three parts. From part one of the study (the dose-escalation phase), the recommended single-agent dose was determined to be 20 mg/kg once every two weeks or 10 mg/kg weekly. In the second part of the study (the cohort expansion phase), additional patients are being enrolled to further assess ZW25’s single-agent tolerability and anti-tumor activity against a variety of cancer types in different settings. The third part of the study (the combination phase) is underway and evaluating ZW25 in combination with selected chemotherapy agents in gastroesophageal and breast cancer patients with HER2 high or lower HER2 expression levels. More information about ZW25 clinical trials can be found at clinicaltrials.gov.
About ZW25
ZW25 is being evaluated in Phase 1 and Phase 2 clinical trials across North America and South Korea. It is a bispecific antibody, based on Zymeworks’ Azymetric platform, that can simultaneously bind two non-overlapping epitopes of HER2, known as biparatopic binding. This unique design results in multiple mechanisms of action including dual HER2 signal blockade, increased binding and removal of HER2 protein from the cell surface, and potent effector function leading to encouraging anti-tumor activity in patients. Zymeworks is developing ZW25 as a HER2-targeted treatment option for patients with any solid tumor that expresses HER2. The FDA has granted Fast Track designation to ZW25 for first-line gastroesophageal adenocarcinoma in combination with standard of care chemotherapy and Orphan Drug designation to ZW25 for the treatment of both gastric and ovarian cancers.