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Dyne Therapeutics falls on revised timelines for genetic disorder therapy

ReutersJun 17, 2025 1:52 PM

Shares of therapy developer Dyne Therapeutics DYN.O fall 19.03% to $11.20

Co revises timelines for data updates and submission for its genetic disorder therapy DYNE-101 after meeting with FDA

DYNE-101 is being studied for the treatment of myotonic dystrophy type 1, a genetic disorder causing progressive muscle weakness and wasting

Co revises main goal in the registration expansion cohort to change from baseline in middle finger myotonia, a symptom which causes delayed muscle relaxation, as measured by video hand opening test at 6 months, compared to placebo

Data from the trial is now expected in mid-2026, compared to first half of 2026 expected previously

Also pushes submission seeking accelerated approval to late 2026 from H1 2026

Stock down ~47% YTD

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