PureTech Founded Entity Seaport Therapeutics Reports Positive Multiple-Ascending Dose Data from Phase 1 Proof-of-Concept Trial of GlyphAgo™ in Healthy Volunteers

PureTech Health plc (LSE: PRTC) ("PureTech" or the "Company"), a hub-and-spoke biotherapeutics company dedicated to giving life to science and transforming innovation into value, notes that its Founded Entity, Seaport Therapeutics, announced positive data from the multiple-ascending dose (MAD) portion of its Phase 1 proof-of-concept clinical trial evaluating repeat dosing of GlyphAgo™ (SPT-320), a novel, Glyphed oral prodrug of agomelatine, in healthy volunteers. Repeat dosing of GlyphAgo demonstrated a safety, tolerability, and pharmacokinetic (PK) profile consistent with previously reported single-ascending dose (SAD) and crossover data, supporting its planned advancement of GlyphAgo into two parallel Phase 2 trials in patients with generalized anxiety disorder (GAD).

Seaport expects to initiate a Phase 2a proof-of pharmacology trial in the second half of 2026. This randomized, double-blind trial of two dose levels of GlyphAgo is designed to demonstrate proof-of-pharmacology by characterizing the potential benefits of GlyphAgo on sleep, including objective measures of sleep architecture, in patients with GAD and sleep disturbance. Topline data from this trial are expected in early 2028.