regulation
Another post-Makary reversal
The FDA will convene an advisory committee meeting to discuss Sydnexis' investigational treatment for pediatric myopia, the biotech said yesterday. It's another instance of the agency reversing a decision made under former Commissioner Marty Makary.
Last year, during Makary's tenure, the FDA had asked Sydnexis to prepare for an advisory committee meeting, but later said a meeting was no longer necessary and proceeded to reject the drug, saying the company's efficacy data were not “clinically meaningful.”
The latest reversal is one of several that have occurred under acting Commissioner Kyle Diamantas, who took over from Makary in May. Under Diamantas, the agency has changed course on decisions related to UniQure's treatment for Huntington's disease and Regenxbio's gene therapy for Hunter syndrome.
regulation
FDA psychedelic guidance expands on unblinding, durability data
The FDA yesterday released final guidance on psychedelic drug development, providing more recommendations on trial design than in earlier draft guidance posted in 2023.
Since psychedelics can lead to intense perceptual changes, experts and regulators worry that participants and researchers will be effectively unblinded and be aware of the treatment they received, increasing the risk of bias in their responses.
In the final guidance, the FDA said drugmakers can minimize biases by using questionnaires to ask both participants and researchers whether they think an active treatment was used, as well as separate questionnaires to ask participants about their expectations for drug effects before and after treatment.
The final guidance also said that trials should not include an overrepresentation of people who have had prior psychedelic experience, since they're more likely to recognize the effects of the drugs, raising the risk of unblinding.
While the draft guidance said drugmakers should follow participants in open-label extensions for a year after randomized trials, the new guidance, said the most informative trial designs would incorporate blinded one-year follow-ups, adding that if data suggest regular redosing is warranted, then the drugmaker should study the recommended dosing intervals.
The agency will also hold a public hearing in September about the therapeutic use of psychedelic drugs.
neuroscience
Alzheimer's Association invests in GLP-1 research
From STAT's “AAIC in 30 minutes” newsletter: The Alzheimer’s Association said yesterday it will put up $100 million for a global study that will test whether combining lifestyle interventions and metabolic drugs — like GLP-1 obesity medicines — can reduce the risk of cognitive decline and dementia.
The association framed the study as a new approach as prevention efforts get greater attention and funding. It’s an effort to merge takeaways from lifestyle studies into risk reduction with research into the connection between cardiometabolic health and dementia.
“By testing a combined approach that targets both lifestyle and biology, we have the opportunity to better understand how to meaningfully reduce the risk of cognitive decline before symptoms begin,” Maria Carrillo, the association’s chief science officer, said in a statement.
The study will be called PROTECT-Cog, a riff on “prevention of risk for cognitive decline through combined therapy.” It will enroll older adults at elevated risk for cognitive decline and follow them for three years.
In its announcement, the association cited “emerging evidence” suggesting GLP-1 drugs have the potential to reduce dementia risk quite substantially compared to other diabetes treatments, noting that experts think the health benefits of the treatments come from not just regulating appetite, but also from reducing inflammation.
One note of caution: Novo Nordisk ran two placebo-controlled trials of its drug semaglutide (the key ingredient in Wegovy and Ozempic) to test whether it could slow the progression of Alzheimer’s versus placebo, and both studies failed.
“There is clearly a need to better understand the timing and use of these therapies in prevention,” the association said.