Entrada Therapeutics, Inc. announced positive preliminary data from its Phase 1 clinical trial, ENTR-601-44-101. Data will be featured in a presentation at the 29th Annual Congress of the World Muscle Society, taking place in Prague, Czechia from October 8-12, 2024. The primary objective of Entrada?s Phase 1 clinical trial was to evaluate the safety and tolerability of a single dose of ENTR-601-44.

ENTR-601-44-101 also evaluated pharmacokinetics and target engagement, as measured by exon skipping in the skeletal muscle. The study included a total of 32 healthy male volunteers across four cohorts, with each cohort consisting of six participants receiving ENTR-601-44 and two participants receiving a placebo control. The doses administered across the cohorts were 0.75 mg/kg, 1.5 mg/kg, 3 mg/kg and 6 mg/kg.

There were no serious adverse events, no drug-related adverse events and no clinically significant changes or trends noted in vital signs, ECGs, physical exams or laboratory assessments observed in the trial. The study demonstrated target engagement as measured by exon skipping on a ng/g of tissue adjusted basis supporting the importance of endosomal escape to therapeutic index optimization. Muscle concentration was detected in all six subjects in the 6 mg/kg dose cohort (mean of 53.8 ng/g, range 40 ng/g-73.5 ng/g) and mean target engagement as measured by exon skipping was 0.44% (range 0.3-0.65%).

Exon skipping was statistically significant compared to the placebo control (p<0.005) in the 6 mg/kg dose cohort. These results are based upon data collected to date and are aggregated based upon the placebo and study drug groups. Based on the positive preliminary data from the Phase 1 clinical trial, the Company is on track to submit regulatory applications in the fourth quarter of 2024 to initiate separate global Phase 2 clinical trials for ENTR-601-44 in patients with Duchenne who are exon 44 skipping amenable and for ENTR-601-45 in patients with Duchenne who are exon 45 skipping amenable.

In addition, the Company plans to submit regulatory applications in 2025 to initiate a global Phase 2 clinical trial for its third Duchenne candidate, ENTR-601-50, in patients who are exon 50 skipping amenable.