ProMIS Neurosciences Inc.Positive safety and biomarker data from Phase 1b trial of PMN310, with no ARIA-E and biomarker declines suggesting target engagement.

ProMIS Neurosciences announced positive blinded six-month interim safety and biomarker results from its Phase 1b PRECISE-AD trial of PMN310 in Alzheimer's disease. In the blinded analysis of 136 patients, no cases of amyloid-related imaging abnormalities-edema were observed across all genotypes, including APOE4 homozygotes, and total ARIA was 4.4 percent, all mild and asymptomatic microhemorrhages. On a blinded basis, 68.5 percent of patients showed a decline in plasma pTau217 and 62.5 percent showed a decline in CSF MTBR-tau243, consistent with potential target engagement and possibly reflecting the trial's 3-to-1 active-to-placebo randomization. The company expects unblinded 12-month topline results, including efficacy data, in the first quarter of 2027.
ProMIS Neurosciences Inc.Positive safety and biomarker data from Phase 1b trial of PMN310, with no ARIA-E and biomarker declines suggesting target engagement.