AC Immune Reports Favorable Interim Safety Data for ACI-24.060 in Down Syndrome Phase 1b/2 ABATE Trial

ACIU
October 08, 2025

AC Immune SA announced positive interim safety and tolerability data from the ABATE Phase 1b/2 trial of ACI-24.060 in individuals living with Down syndrome. ACI-24.060 is an active immunotherapy designed to target toxic forms of amyloid beta.

The interim analysis, based on data from the first two cohorts receiving low-dose and mid-dose ACI-24.060 for up to one year, showed no serious adverse events related to the study drug. Crucially, no cases of amyloid-related imaging abnormalities (ARIA) were observed in this patient population.

Based on these encouraging findings, AC Immune plans to open the high-dose cohort in the ABATE trial for individuals with Down syndrome. ACI-24.060 has previously received Fast Track designation from the U.S. FDA for the treatment of Alzheimer's disease, underscoring its therapeutic potential.

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