Lilly’s Solanezumab Fails, But The Surprise Would Have Been Success
The Phase III failure of the Alzheimer’s treatment was largely expected, but is nonetheless a disappointment for the disease and for the anti-amyloid field, casting a shadow over other therapies in development, including Lilly’s own pipeline.
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Solanezumab did not reduce the risk of progression in preclinical Alzheimer’s disease in the Phase III A4 study but it provided evidence that removing amyloid plaques – the mechanism of action for Lilly’s two remaining Phase III AD therapies, donanemab and remternetug – may be the key to efficacy.
TRAILBLAZER-ALZ met the primary, but not most secondary endpoints. Lilly said efficacy of its amyloid-clearing agent depends on tau levels at baseline and reductions in some parts of the brain.
Lilly took a different path to positive results in Alzheimer’s with a smaller, biomarker-driven study to test the hypothesis that rapid, robust clearance of amyloid could slow disease progression, CEO David Ricks explains at J.P. Morgan.