Core Insights - Roche Holdings AG presented new data on trontinemab at the AD/PD 2025 International Conference, highlighting its potential in Alzheimer's disease treatment and the Elecsys pTau181 plasma test's ability to rule out amyloid pathology [1][4]. Group 1: Trontinemab Study Results - The ongoing Phase 1b/2a Brainshuttle AD study of trontinemab showed dose-dependent rapid amyloid depletion from the brain [1]. - Preliminary results indicated that trontinemab reduced amyloid levels below the 24 centiloid threshold in 81% of participants (21 out of 26) in the 3.6 mg/kg dose group after 28 weeks [6]. - The study reported a favorable safety profile, with amyloid-related imaging abnormalities (ARIA-E) observed in less than 5% of participants, and only one case associated with mild symptoms [3]. Group 2: Elecsys pTau181 Plasma Test - Results from a multicenter study involving 604 participants demonstrated the Elecsys pTau181 plasma test's potential to accurately rule out amyloid pathology in individuals with cognitive impairment [4]. - Roche anticipates that the Elecsys pTau181 test will be available in Europe by late 2025, followed by the U.S. [4]. Group 3: Future Developments - Roche plans to initiate a Phase 3 program for trontinemab later this year [4]. - The company continues to reinforce its commitment to advancing research in Alzheimer's disease through ongoing studies and new testing methods [4]. Group 4: Market Reaction - Following the presentation of the new data, Roche's stock (RHHBY) closed lower by 4.37% to $37.65 [5].
Roche To Start Phase 3 Study For Alzheimer's Prospect This Year After New Data From Phase 2