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Biogen and Denali Therapeutics Provide Update on Phase 2b LUMA Study of BIIB122 (DNL151) in Early-Stage Parkinson’s Disease

$BIIBPress releaseMay 21, 2026, 6:00 PM ETRead the release

Biogen and Denali Therapeutics announced that the Phase 2b LUMA study of BIIB122 in early-stage Parkinson’s disease failed to meet its primary or secondary endpoints. The drug did not slow disease progression versus placebo, leading the companies to discontinue development of BIIB122 in idiopathic Parkinson’s disease.

Key figures

Drug Name
BIIB122 (DNL151)
Phase Of Trial
Phase 2b
Study name
LUMA
Patient count
648
Kinase inhibition
>90%
Biomarker reduction
~30%

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