Merck KGaA and Pfizer Initiate Two Phase III Studies of Investigational Immunotherapy Avelumab

Merck KGaA, Darmstadt and Pfizer announced the initiation of two Phase III studies of avelumab*, an investigational, fully human anti-PD-L1 IgG1 monoclonal antibody, in treating advanced or metastatic gastric/gastro-esophageal junction (GEJ) cancers, which are aggressive cancers with poor survival rates. These pivotal trials are investigating avelumab in the first-line and third-line settings, with overall survival (OS) as the primary endpoint in both trials.

JAVELIN Gastric 100, a study comparing the switch from first-line chemotherapy to maintenance therapy with avelumab versus continuation of chemotherapy, is a multicenter, international, randomized, open-label Phase III trial designed to evaluate the potential superiority (based on OS) of maintenance therapy with avelumab in patients with unresectable, locally advanced or metastatic gastric/GEJ cancers whose disease has not progressed with first-line platinum-based chemotherapy. This is currently the only Phase III trial in gastric cancer that is designed to evaluate superiority of an immunotherapy compared with conventional platinum-based chemotherapy as a first-line maintenance treatment. The study will enroll 629 patients across more than 220 sites in Asia Pacific, Europe, North America and South America.

The clinical development program for avelumab now includes more than 1,500 patients who have been treated across more than 15 tumor types, including breast cancer, gastric/GEJ cancers, head and neck cancer, Merkel cell carcinoma, melanoma, mesothelioma, non-small cell lung cancer, ovarian cancer, renal cell carcinoma and urothelial (e.g. bladder) cancer. Clinical trials for both of the gastric/GEJ Phase III trials in North America will be conducted on behalf of Merck KGaA, Darmstadt, Germany, by EMD Serono, the company’s US and Canadian biopharma business.

Merck KGaA and Pfizer to Present Updates for Avelumab at the European Cancer Congress 2015

Merck KGaA, Darmstadt, Germany and Pfizer announced that six abstracts on studies evaluating the potential role of programmed death-ligand 1 (PD-L1) inhibition and the safety and efficacy of the investigational cancer immunotherapy avelumab* will be presented at this year’s ECC in Vienna, Austria, September 25–29, 2015.

New data will be presented in urothelial (e.g. bladder), mesothelioma and gastric/gastroesophageal cancers. Additional NSCLC and ovarian cancer data from Phase Ib trials build on those previously presented at the 2015 Annual Meeting of the American Society of Clinical Oncology (ASCO). As the promise of immuno-oncology continues to grow, these new data help to further the understanding of the potential role of avelumab for patients suffering from cancers with high unmet need.

Despite continued progress in bringing new treatments to patients, there remains a significant unmet need across many types of cancer. For example, the incidence of gastric cancer remains a major public issue in Western and Asian countries, and there is a continued need to better understand the disease biology to provide patients with the most appropriate and effective treatment. For some cancer types, such as mesothelioma, the incidence rates are rising worldwide, with limited treatment options currently available for patients.

Currently, more than 1,000 cancer patients have been treated with avelumab in the Phase I/Ib clinical program (JAVELIN Solid Tumor), and more than 15 tumor types are under investigation.