Tenaya Therapeutics, Inc. (NASDAQ:TNYA), a clinical-stage biotechnology company with a mission to discover, develop and deliver potentially curative therapies that address the underlying causes of heart disease, today reported encouraging early data from the first cohort of patients in the MyPEAK-1 clinical trial of TN-201 gene therapy. TN-201 is being developed for the potential treatment of MYBPC3-associated hypertrophic cardiomyopathy (HCM), a condition caused by insufficient levels of myosin-binding protein C (MyBP-C).

Preliminary data from three patients in the first dose cohort of 3E13 vg/kg (Cohort 1) showed that TN-201 was generally well tolerated, with readily detectable vector DNA in the heart, evidence of transgene RNA expression, and increasing TN-201 mRNA and MyBP-C protein levels over time. Circulating biomarkers of cardiac muscle strain and injury remained largely stable, and other clinical markers of disease showed stability or directional improvement in the first two individuals dosed, though longer-term data are needed to characterize TN-201's activity. Tenaya will continue to follow these first three patients with additional data readouts from Cohort 1 and the higher dose Cohort 2 anticipated in 2025.