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August 1, 2018

Denali Therapeutics Announces Positive Clinical Results From LRRK2 Inhibitor Program for Parkinson’s Disease

SOUTH SAN FRANCISCO, Calif. — Denali Therapeutics Inc. (NASDAQ: DNLI), a biopharmaceutical company developing a broad portfolio of product candidates for neurodegenerative diseases, today announced positive results from its Phase 1 clinical study with DNL201, a small molecule inhibitor of leucine-rich repeat kinase 2 (LRRK2).

In a randomized, double blind, placebo-controlled, oral dose study in healthy subjects, DNL201 achieved its safety, pharmacokinetic, and pharmacodynamic objectives. DNL201 was generally well tolerated with no serious adverse events at doses that achieved high levels of cerebrospinal fluid (CSF) exposure, robust target engagement as measured by two blood-based biomarkers of LRRK2 activity, and effects on biomarkers of lysosomal function.

Mutations in the LRRK2 gene are the most frequent genetic cause of Parkinson’s disease and a major driver of lysosomal dysfunction, which contribute to the formation of Lewy body protein aggregates and neurodegeneration. LRRK2 regulates lysosomal genesis and function, which is impaired in Parkinson’s disease and may be restored by LRRK2 inhibition, thereby potentially positively modifying disease progression in patients with a genetic LRRK2 mutation as well as in patients with sporadic Parkinson’s disease.

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