Roche Reports Positive Data on Alzheimer’s Drug

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Roche is reporting new data on its Alzheimer’s therapy trontinemab and its plans to begin two Phase 3 clinical trials by the end of the year. Trontinemab, delivered via Roche’s proprietary Brainshuttle technology, continues to show promising results in an ongoing Phase 1b/2a study, according to the company. After 28 weeks of treatment, 91% of participants in the 3.6 mg/kg cohort demonstrated a significant reduction in amyloid plaques, becoming PET scan-negative for amyloid pathology — a hallmark of Alzheimer’s disease, it says. Deep plaque clearance was seen in 72% of patients. The rate of ARIA-E, a potential side effect linked to anti-amyloid therapies, remained below 5%, with all cases mild and mostly symptom-free, it adds.

Roche plans to launch two global Phase 3 trials, TRONTIER 1 and 2, by the end of 2025 to evaluate trontinemab in people with early symptomatic Alzheimer’s. Both studies will use changes in cognition and function, assessed via the Clinical Dementia Rating – Sum of Boxes (CDR-SB), as the primary endpoint after 18 months of treatment. The company also announced plans for a third Phase 3 trial targeting individuals in the preclinical stage of Alzheimer’s who are at high risk of cognitive decline.

Additionally, Roche announced encouraging real-world data on its Elecsys pTau217 and pTau181 assays, which are designed to detect Alzheimer’s disease using a blood sample. These blood-based biomarkers were shown to be comparable to PET scans and cerebrospinal fluid tests in detecting amyloid pathology, the company says.

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