Douglas Macpherson's questions to Alector (ALEC) leadership • Q2 2025
Question
Douglas Macpherson of Mizuho Securities asked what measures were taken in the INFRONT3 trial to minimize a potential placebo effect on subjective clinical endpoints. He also inquired about the risk of ARIA-E (amyloid-related imaging abnormalities) side effects.
Answer
CMO Giacomo Salvadore explained that the trial's powering accounts for placebo effects, which tend to dissipate over the 96-week study duration in neurodegenerative diseases. He confirmed there have been no reports of ARIA in the study, noting the biological mechanism for ARIA (amyloid removal) is not relevant to FTD-GRN.