Cabaletta Bio Presents First Rese-cel Data with No Preconditioning Demonstrating Biologic Activity and Early Clinical Responses at the 2025 ESGCT Annual Congress

Core Insights - Cabaletta Bio, Inc. presented promising initial data from the RESET-PV trial, indicating that rese-cel can achieve complete B cell depletion and significant clinical responses without preconditioning in patients with pemphigus vulgaris [1][2][3] Group 1: Clinical Trial Results - In the RESET-PV trial, three patients received rese-cel at a dose of 1 x 10^6 cells/kg without preconditioning, resulting in complete B cell depletion in two patients and a rapid reduction in autoantibodies [1][3] - All three patients showed improvement in Pemphigus Disease Area Index (PDAI) scores, with notable reductions from baseline: Patient 1 (24 to 10), Patient 2 (83 to 3), and Patient 3 (22 to 2) [9] - The safety profile of rese-cel was favorable, with no cases of immune effector cell-associated neurotoxicity syndrome (ICANS) reported, and only mild transient fever observed in one patient [3][4] Group 2: Future Plans and Strategy - The company plans to expand patient enrollment in the RESET-PV trial and explore higher doses of rese-cel based on the observed clinical activity [2][10] - Cabaletta is considering the incorporation of no preconditioning regimens in other cohorts of the RESET clinical trial program, aiming to broaden treatment options for autoimmune diseases [2][10] - The RESET-PV trial is part of a larger RESET clinical development program that includes trials for various autoimmune diseases, indicating a strategic focus on innovative treatment approaches [6][7]