One Difference Between Amylyx’s ALS Drug And Aduhelm: A Biomarker Endpoint
US FDA’s Billy Dunn says that if the drug had shown a positive effect on plasma neurofilament heavy chain, it ‘would have provided important contextual and supportive information of an ostensibly beneficial effect on the clinical measure.’
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In switching their votes from the first panel review in March, advisory committee members cited supportive additional analyses of a survival benefit, framing of the issues in the context of unmet need and regulatory flexibility, and the company’s statement that it would withdraw AMX0035 if the Phase III PHOENIX trial does not succeed.
Amylyx’s ALS Drug Lacks ‘Confirmatory Evidence’ Needed To Support Approval On Single Study, FDA Says
New analyses on individual responders, survival and biomarker data are not independent evidence of AMX0035’s clinical effect in ALS, agency says in advisory committee briefing document. However, FDA’s framing of the issues, with an emphasis on regulatory flexibility and unmet medical need, could sway a favorable recommendation in its second panel review.
Company is coming into its second panel meeting with new data analyses from the CENTAUR trial, advisory committee experience under its belt, and a recent Health Canada approval. In an interview with the Pink Sheet, co-CEOs Cohen and Klee highlight clinical outcomes data with AMX0035 and say they are not too worried about the lack of effect on neurofilament biomarker.