ProMIS Neurosciences Inc.First human evidence of target engagement for PMN310, a key clinical milestone.

ProMIS Neurosciences reported the first human evidence that its lead Alzheimer's drug candidate, PMN310, can reduce toxic amyloid-beta oligomers in cerebrospinal fluid. In a Phase 1a trial, healthy volunteers showed a dose-dependent reduction in amyloid-beta oligomers detectable at both 3 and 29 days after dosing. The company presented the findings at the AAIC 2026 conference, noting that PMN310 selectively targets oligomers without binding to plaques, potentially reducing side effects like ARIA. ProMIS plans to use this assay in its ongoing PRECISE-AD Phase 1b trial in Alzheimer's patients, with six-month blinded interim data expected in the coming weeks and top-line unblinded results in early Q1 2027. The stock closed Monday at $12.80, down 10.18%, but rose 12.50% to $14.40 in pre-market trading.
ProMIS Neurosciences Inc.First human evidence of target engagement for PMN310, a key clinical milestone.