WATERTOWN, Mass., Oct. 29, 2025 (GLOBE NEWSWIRE) — Tectonic Therapeutic, Inc. (NASDAQ: TECX) (“Tectonic”), today announced positive topline results from the Phase 1b Part B acute hemodynamic clinical trial of TX45, a long-acting, Fc-relaxin fusion protein, in patients with Group 2 PH‑HFrEF. The topline data showed that a single intravenous dose of TX45 was well tolerated in this patient population and resulted in meaningful improvements in both left heart function and pulmonary hemodynamics.

WATERTOWN, Mass., May 17, 2025 (GLOBE NEWSWIRE) — Tectonic Therapeutic, Inc. (NASDAQ: TECX) (“Tectonic”) today announced the complete results from Part A of the Phase 1b clinical trial of TX45 in patients with Group 2 Pulmonary Hypertension in Heart Failure with preserved Ejection Fraction (“PH-HFpEF”), which are being presented in a late-breaking, oral session at the European Society of Cardiology (ESC) Heart Failure 2025 Congress being held in Belgrade, Serbia. The results include the full cohort of 19 patients in Part A of the Phase 1b trial of TX45, Tectonic’s lead asset and a long-acting relaxin therapy. Interim data for 16 patients in the Phase 1b trial was previously reported in a press release on January 30, 2025.

Late-breaking oral presentation to include full Phase 1b results for TX45 in the Group 2 Pulmonary Hypertension in Heart Failure with Preserved Ejection Fraction (“PH-HFpEF”) cohort Late-breaking oral presentation to include full Phase 1b results for TX45 in the Group 2 Pulmonary Hypertension in Heart Failure with Preserved Ejection Fraction (“PH-HFpEF”) cohort

WATERTOWN, Mass., Jan. 30, 2025 (GLOBE NEWSWIRE) — Tectonic Therapeutic, Inc. (NASDAQ: TECX) (“Tectonic”), today announced positive interim data from the Phase 1b acute hemodynamic clinical trial of its lead product candidate, TX45, a long-acting, Fc-relaxin fusion protein. The interim data showed that a single intravenous dose of TX45 resulted in meaningful improvements in both left ventricular function and pulmonary hemodynamics in patients with Group 2 Pulmonary Hypertension in Heart Failure with Preserved Ejection Fraction (“PH-HFpEF”). In the trial, TX45 was well tolerated in patients with PH-HFpEF with no serious or severe adverse events.