Update on Phase III JAVELIN Gastric 300 Trial of Avelumab in Pretreated Advanced Gastric Cancer

On November 28, Merck KGaA and Pfizer announced that the phase III JAVELIN Gastric 300 trial did not meet its primary endpoint of superior overall survival with single-agent avelumab (Bavencio) compared with physician's choice of chemotherapy.

The trial investigated avelumab as a third-line treatment for unresectable, recurrent, or metastatic gastric or gastroesophageal junction (GEJ) adenocarcinoma patients whose disease progressed following two prior therapeutic regimens, regardless of programmed cell death ligand 1 (PD-L1) expression. The safety profile of avelumab was consistent with that observed in the overall JAVELIN clinical development program.

“Gastric cancer in the third-line setting is a particularly hard-to-treat and heterogeneous disease, and importantly, this was the first trial conducted with a checkpoint inhibitor compared to an active chemotherapy comparator rather than placebo in a global patient population,” said Luciano Rossetti, MD, Executive Vice President, Global Head of Research & Development at the Biopharma Business of Merck KGaA, Darmstadt, Germany, which operates as EMD Serono in the U.S. and Canada. “Data from this study will provide valuable information for physicians treating this late-stage disease. We remain committed to our ongoing gastric cancer program with avelumab, including the JAVELIN Gastric 100 study in the first-line switch maintenance setting.”

The JAVELIN Gastric 300 data will be further examined in an effort to better understand the results and will also be submitted for presentation at an upcoming medical congress. The outcome of JAVELIN Gastric 300 does not have any impact on current avelumab approvals.

More About JAVELIN Gastric Program

JAVELIN Gastric 300 is a phase III, multicenter, international, randomized, open-label clinical trial investigating avelumab plus best supportive care vs physician's choice of protocol-specified chemotherapy (paclitaxel or irinotecan monotherapy) plus best supportive care in patients with unresectable, recurrent, or metastatic gastric or GEJ adenocarcinoma whose disease has progressed following two prior therapeutic regimens. The trial enrolled 371 patients from 147 sites in Asia, Australia, Europe, North America, and South America. The primary endpoint was overall survival.

The avelumab gastric clinical development program also includes JAVELIN Gastric 100, a multicenter, randomized, open-label phase III study evaluating avelumab as first-line maintenance therapy following induction chemotherapy in unresectable, locally advanced, or metastatic gastric or GEJ cancer. The trial will continue as planned.

The content in this post has not been reviewed by the American Society of Clinical Oncology, Inc. (ASCO®) and does not necessarily reflect the ideas and opinions of ASCO®.


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