Amgen Announces Top-Line Secondary Endpoint Results of Phase III Trebananib TRINOVA-1 Trial In Patients with Recurrent Ovarian Cancer

Amgen has announced the top-line secondary endpoint results of overall survival from the Phase III TRINOVA-1 trial in women with recurrent platinum-resistant ovarian cancer. The study, which evaluated trebananib plus paclitaxel versus placebo plus paclitaxel, did not demonstrate a statistically significant improvement in overall survival. Median overall survival was 19.3 months in the trebananib arm versus 18.3 months in the control arm. The data will be submitted to a future medical conference and for publication.

In the previously reported primary endpoint analysis, the data demonstrated a statistically significant difference in progression-free survival for trebananib. In that analysis, patients treated with trebananib showed a 34% reduction in the risk of disease progression or death (HR = 0.66, 95% CI, 0.57, 0.77, p<0.001). The median progression-free survival was 7.2 months in the trebananib arm versus 5.4 months in the control arm.

"While the overall survival results of the TRINOVA-1 study are disappointing, this study is the first of three Phase III trials designed to evaluate the safety and efficacy of trebananib in patients with ovarian cancer," said Sean E. Harper, Executive Vice President of R&D at Amgen. "We continue to explore the potential of trebananib's novel anti-tumor mechanism of action in other cancer settings."

In the trebananib arm, the most frequently reported adverse events were localised edema, nausea and alopecia. The rate of discontinuation of investigational product due to adverse events was 20% in the trebananib arm versus seven percent in the control arm. No new safety signals were detected.

Data from another trial in the recurrent platinum-resistant population (TRINOVA-2) is expected in Q4 2014. Data from a trial evaluating trebananib in combination with first-line chemotherapy treatment for patients with ovarian cancer (TRINOVA-3) is expected in 2015.