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Geoffrey Y. Ku, MD, discusses the rationale to evaluate zanidatamab in combination with chemotherapy in HER2-expressing gastroesophageal adenocarcinoma.
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Geoffrey Y. Ku, MD, medical oncologist, head, Esophagogastric Section, Gastrointestinal Oncology Service, Memorial Sloan Kettering Cancer Center, discusses the rationale to evaluate zanidatamab in combination with chemotherapy in HER2-expressing gastroesophageal adenocarcinoma (GEA).
In the phase 1 ZW25-101 trial (NCT02892123), zanidatamab, a bispecific, IgG1-like antibody, demonstrated durable responses and good tolerability when used as monotherapy in patients with heavily pretreated advanced or metastatic HER2-expressing GEA, Ku explains. The confirmed overall response rate was 33% among 35 patients in this population, and the median duration of response was 6 months.
These results served as the basis for the ongoing phase 2 ZWI-ZW25-201 trial (NCT03929666), which is evaluating zanidatamab in combination with physician’s choice of standard frontline chemotherapy in patients with unresectable, locally advanced, or metastatic HER2-expressing GEA, Ku concludes.
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