Quince Therapeutics is a late-stage biotechnology company dedicated to unlocking the power of a patient’s own biology for the treatment of rare diseases.

Our Phase 3 lead asset, EryDex, is the first product in development that leverages our proprietary Autologous Intracellular Drug Encapsulation, or AIDE, technology platform, which is a novel drug/device combination that uses an automated process designed to encapsulate a drug into the patient’s own red blood cells. Red blood cells have several characteristics that make them a potentially effective vehicle for drug delivery, including potentially better tolerability, enhanced tissue distribution, reduced immunogenicity, and prolongation of circulating half-life. Quince’s AIDE technology is designed to harness these benefits to allow for the chronic administration of drugs that have limitations due to toxicity, poor biodistribution, suboptimal pharmacokinetics, or immune response.

EryDex is composed of dexamethasone sodium phosphate (DSP) encapsulated in autologous red blood cells targeted to treat a rare pediatric neurodegenerative disease called Ataxia-Telangiectasia, or A-T. DSP is a corticosteroid well known for its anti-inflammatory properties, as well as its dose-limiting toxicity due to adrenal suppression. EryDex is designed to provide the efficacy of corticosteroids and to reduce or eliminate the significant adverse effects that accompany chronic corticosteroid treatment.

We are currently enrolling the pivotal Phase 3 NEAT study, which is an international, multi-center, randomized, double-blind, placebo-controlled clinical trial evaluating the neurological effects of EryDex in patients with A-T. The Phase 3 NEAT trial is being conducted under a Special Protocol Assessment (SPA) agreement with the U.S. Food and Drug Administration (FDA), and we expect to report topline results in the fourth quarter of 2025 with a potential New Drug Application (NDA) submission to the FDA and a Marketing Authorization Application (MAA) submission to the European Medicines Agency (EMA) in 2026, assuming positive study results. Additionally, Quince was granted Fast Track designation by the FDA for the company’s EryDex System for the treatment of patients with A-T based on the potential for EryDex to address a high unmet medical need in A-T.