Questions remain
“This is an interesting study that suggests donanemab may remove amyloid faster in more people than aducanumab,” said Heather Snyder, PhD, Alzheimer’s Association vice president of medical and scientific relations, who commented on the findings.
Howard Fillit, MD, cofounder and chief science officer at the Alzheimer’s Drug Discovery Foundation, also commented on the findings. He noted that faster amyloid clearance “means less time for requiring sometimes burdensome and expensive infusions.”
Both Dr. Snyder and Dr. Fillit noted that longer-term results are needed, along with studies of whether amyloid clearance offers a protective benefit against Alzheimer’s dementia. More results from Trailblazer 4 will be reported after 12 months and again at 18 months.
“There are obviously still a lot of questions about these drugs and whether reducing amyloid plaque will actually preserve cognitive function or at least slow decline,” Dr. Fillit said.
It will also be important to understand the timing of treatment, including when anti-amyloid therapies should be administered and for how long.
“It will be important to understand how these results translate to patient care and treatment plans, should this drug receive FDA approval,” Dr. Snyder said. “Patients should have the opportunity to make a decision, alongside their physician, on a treatment path that is right for them.”
The study was funded by Eli Lilly. Dr. Salloway has been a consultant for Biogen, EISAI, Lilly, Genentech, Novo Nordisk, Prothena, and others. Dr. Snyder and Dr. Fillit have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.