Samantha Schaeffer's questions to Alector Inc (ALEC) leadership • Q2 2025
Question
Samantha Schaeffer of Cantor Fitzgerald asked if the company expects to see signs of disease progression or a treatment effect in the 16 asymptomatic patients enrolled in INFRONT3 within the 96-week trial period. She also inquired about the patient rollover rate into the open-label extension study.
Answer
CMO Giacomo Salvadore noted that the asymptomatic cohort is part of a sensitivity analysis and could not comment on expected outcomes as the trial is blinded. CEO Arnon Rosenthal added these patients were selected based on high neurofilament levels, which suggests a risk of conversion. Regarding the open-label extension, Giacomo Salvadore said the company is satisfied with the rollover rate but has not disclosed specific numbers.