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Respira Therapeutics Enters into Agreement with Gossamer Bio (Gossamer) Granting Gossamer Option to Acquire Respira from Samsara BioCapital
Prnewswireยท2025-09-25 11:41

Core Viewpoint - Respira Therapeutics has entered into an agreement with Gossamer Bio, granting Gossamer an option to acquire Respira, aimed at accelerating the development of RT234, a first-in-class inhalation therapy for pulmonary hypertension (PH) [1][3]. Company Overview - Respira Therapeutics is a clinical-stage biopharmaceutical company focused on developing RT234 (vardenafil inhalation powder) as a self-administered, as-needed therapy for rapid relief of exertional symptoms in pulmonary hypertension patients [5]. - RT234 utilizes proprietary dry-powder formulation and inhaler technologies to maximize drug delivery to the deep lung [5]. Product Development - RT234 is designed to provide rapid, on-demand relief for symptoms such as breathlessness, which are prevalent among PH patients and often disrupt daily life [5]. - The therapy is positioned to be used alongside existing chronic treatments, representing a novel approach in the management of PH [5]. Clinical Data - In two completed open-label Phase 2 studies involving 56 PAH patients, RT234 showed rapid and clinically meaningful improvements in hemodynamic and functional measures, including reduced pulmonary vascular resistance and increased exercise capacity [6]. - The therapy has demonstrated a favorable safety and tolerability profile to date [6]. Transaction Details - Under the option agreement, Gossamer is issuing 2.5 million shares of common stock upon signing, with an additional 1.5 million shares to be issued upon exercising the acquisition option [3]. - The agreement includes success-based milestone payments and royalties on potential net sales of RT234 [3]. Strategic Collaboration - The collaboration aims to leverage Gossamer's established late-stage product development platform to advance RT234 into late-stage clinical development [3][7]. - Both companies share a commitment to improving the lives of patients living with pulmonary hypertension [2][7].