Bristol-Myers Squibb's Opdivo fails 3rd straight test in tough-to-treat brain cancer

BMS' Opdivo flopped in a separate phase 3 glioblastoma study earlier this year. (Bristol-Myers Squibb)

Bristol-Myers Squibb has once again come up empty-handed in one of the world’s deadliest and toughest-to-treat cancers.

Thursday, the New Jersey drugmaker said adding its immuno-oncology star Opdivo to standard-of-care treatment had failed to significantly cut the risk of disease worsening or death among certain newly diagnosed glioblastoma patients.

But while adding Opdivo didn't improve on progression-free survival results from a chemo-and-radiation regimen, the trial will continue to see whether BMS’ checkpoint drug can prolong lives. Oncology drugs have been known to fall short at stalling disease progression but ultimately help patients live longer, and overall survival is considered the gold-standard endpoint for cancer trials.

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RELATED: Bristol-Myers' Opdivo fails brain tumor test again, this time in new patients

The study, dubbed Checkmate-548, focused on glioblastoma multiforme (GBM) patients with MGMT methylation, a commonly used biomarker in determining treatment for the brain cancer. It's the third miss for Opdivo in a GBM trial.

Bristol, of course, isn’t the only company that’s found glioblastoma a tough nut to crack. The FDA hasn’t green-lighted an investigational med to improve survival for patients with newly diagnosed GBM since 2005, the New Jersey drugmaker noted, and the five-year survival rate for GBM patients sits at less than 5%.

In a statement, Fouad Namouni, M.D., Bristol’s head of oncology development, called GBM “an extremely aggressive and difficult disease to treat.”

One of Opdivo's previous GBM tests showed a combination of the PD-1 med and radiation failed to outdo chemo plus radiation in newly diagnosed patients. Those phase 3 data, released in May, followed an April 2017 trial showing Opdivo didn't measure up to Roche’s Avastin at helping patients with a first recurrence live longer.

RELATED: Bristol-Myers Squibb's Opdivo misses its shot at earlier use in liver cancer

BMS, meanwhile, hasn’t had a great year when it comes to expanding Opdivo’s patient pool in other cancers, either. In June, the drug failed a critical test for moving into earlier liver cancer use, and it’s posted checkered results in the closely watched previously untreated lung cancer field.

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