SOUTH SAN FRANCISCO - Denali Therapeutics Inc. (NASDAQ: DNLI), a biopharmaceutical company developing a broad portfolio of product candidates engineered to cross the blood-brain barrier (BBB) for neurodegenerative diseases, today announced additional positive interim results from the ongoing Phase 1/2 study evaluating ETV:IDS (DNL310) as a potential brain-penetrant enzyme replacement therapy for treating both central nervous system (CNS) and peripheral manifestations of Hunter syndrome (MPS II).

The data will be presented later today during a late-breaker session at WORLDSymposium. Denali management will host an analyst webinar today beginning at 8:00 a.m. Eastern Time to discuss both interim clinical and new preclinical data that will be presented at the conference.

An interim analysis included data on a total of five patients enrolled in Cohort A in the Phase 1/2 study, who all received three months of weekly intravenous doses of DNL310 after switching from idursulfase enzyme replacement therapy on Day 1 of the study. Key results included:

Normal levels of heparan sulfate, a glycosaminoglycan (GAG), in cerebrospinal fluid (CSF) that were seen after four weeks of dosing in four of five patients were sustained after three months of dosing (mean 85% reduction across Cohort A; p

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