ZYME stock dumped, but now is moving higher in early trading on January 13, 2020, after the company announced an agreement with Pfizer.
Zymeworks Inc. (NYSE: ZYME), a clinical-stage biopharmaceutical company developing multifunctional therapeutics, today announced the initiation of a Phase 2 trial evaluating ZW25 combination therapy and an agreement with Pfizer which advances the study. Zymeworks’ HER2-targeted bispecific antibody ZW25 is being evaluated in combination with Pfizer’s Ibrance® (palbociclib), an oral CDK4/6 inhibitor, and the hormone therapy fulvestrant in patients with previously-treated locally advanced and/or metastatic HER2-positive, HR-positive breast cancer. Zymeworks will sponsor the study, and Pfizer will provide palbociclib.
“The initiation of this Phase 2 trial and collaboration with Pfizer mark significant milestones in our progress towards establishing ZW25 as the foundational HER2 therapy in multiple regimens across breast and other cancers,” said Diana Hausman, M.D., Chief Medical Officer at Zymeworks. “Together, ZW25 and palbociclib have the potential to improve anti-tumor activity and minimize side effects for people living with advanced HER2‑positive, HR-positive breast cancer.”
This Phase 2 clinical trial is a multicenter, open-label, two-part study (clinicaltrials.gov: NCT04224272). Part one of the study will evaluate the safety and tolerability of ZW25 in combination with palbociclib and fulvestrant and identify the recommended doses (RD) of ZW25 and palbociclib. Part two of the study will evaluate anti-tumor activity at the RD level. The trial will enroll up to 76 patients at sites in the United States and Canada, and expansion to Spain is planned.
ZW25 is being evaluated within a broad clinical development program in multiple HER2‑expressing cancers, including biliary tract, gastroesophageal adenocarcinoma (GEA), breast, colorectal, and gynecologic cancers. In an ongoing Phase 1 clinical trial, Zymeworks is evaluating ZW25 as a single agent and in combination with chemotherapy as potential treatments for patients with HER2-expressing cancers (clinicaltrials.gov: NCT02892123). For patients with HER2-positive GEA, ZW25 is being studied in a Phase 2 trial as a first-line treatment in combination with standard of care chemotherapy (clinicaltrials.gov: NCT03929666). Zymeworks plans to initiate a registration-enabling Phase 2 trial in previously-treated or recurrent HER2-positive biliary tract cancer in 2020.
Breast cancer occurs when cells of the breast grow uncontrollably. According to the World Health Organization, each year, over 2 million new cases of breast cancer are diagnosed and over 600,000 deaths occur globally. Rates are increasing in nearly every region of the world. For locally advanced or metastatic breast cancer, the American Cancer Society estimates over 271,000 new US cases in men and women this year. About 15 to 20 percent of all breast cancers are positive for human epidermal growth factor receptor 2, or HER2. These cancers make too much HER2 protein, which may cause them to grow more quickly and spread to other parts of the body. Despite the advances with available HER2-targeted therapies, there is still an unmet medical need for people with all HER2-expressing cancers, particularly recurrent or metastatic disease that has progressed after standard of care therapy.
On January 10, 2020, Wolfe Research initiated coverage of Zymeworks with an Outperform rating and $61 price target. Did Wolfe Research know about the Pfizer agreement in advance?–or was that just one heck of a lucky call!
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