Drug Development
Analysts said the outcome is disappointing because there are no approved treatments for dyskinetic cerebral palsy, but the setback had little impact on Neurocrine’s valuation.
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In the midst of regulatory and political upheaval, biopharma’s R&D engine kept running, churning out highs and lows in equal parts. Here are some of this year’s most glorious clinical trial victories.
Every year in biopharma brings its share of grueling defeats, and 2025 was no different, especially for companies targeting neurological diseases. Some failures split up partners, and one particularly egregious case even led to the demise of an entire company.
The R&D pipeline for depression therapies faced a demoralizing 2025 as five high-profile candidates, including KOR antagonists by Johnson & Johnson and Neumora Therapeutics, flunked late-stage clinical trials, underscoring the persistent challenges of CNS drug development.
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Despite the “unfortunate” failure, William Blair analysts do not believe that the utreloxastat readout will heavily affect PTC, instead postulating that the upcoming FDA decision on its phenylketonuria candidate sepiapterin will be a stronger driver of the biotech’s stock.
BridgeBio’s Attruby wins approval for transthyretin amyloid cardiomyopathy while the FDA accepts Alnylam’s application for Amvuttra in the indication; Cassava’s controversial Alzheimer’s drug flunks Phase III; Amgen’s MariTide fails to impress investors, Donald Trump’s controversial nominations continue.
With Amgen’s MariTide results at the lower end of investors’ expectation of 20% to 25% weight loss, the much-anticipated readout sent the company’s shares tumbling.
Alector is kicking off a resource realignment effort that will include a workforce reduction. The biotech expects its current cash position to last it through 2026.
Truqap’s positive clinical data comes after it failed a late-stage study in metastatic triple-negative breast cancer. It helps AstraZeneca position itself as a top player in the prostate cancer space, alongside its Big Pharma colleagues.
While taldefgrobep alfa failed to show improved motor function in spinal muscular atrophy, treated patients saw a marked reduction in body fat. Biohaven plans to launch a Phase II trial in obesity by the end of the year.
Cassava Sciences has revealed the late-stage clinical failure of controversial Alzheimer’s drug simulfilam. The company had pledged to share the results whether “good, bad or ambiguous.”
The FDA has accepted Alnylam’s supplemental New Drug Application for Amvuttra on the heels of BridgeBio’s Attruby nod, potentially giving Pfizer’s tafamidis franchise another competitor.
Sage Therapeutics discontinued development of its lead candidate dalzanemdor after a third clinical failure, leading analysts to question the biotech’s future profitability.
ADC Therapeutics, Sutro Biopharma and Zai Lab are among those developing antibody-drug conjugates to address payload and toxicity challenges of current ADCs—and rapidly grow the multibillion-dollar market.