Drug Responsiveness in Patient-Derived Rectal Organoids Correlates with Clinical Response in CF Subjects: A Real-Life Analysis

Pharmacological modulators of CFTR have significantly changed the cystic fibrosis (CF) phenotype of subjects affected by this multi-organ disease. Here, we evaluated the CFTR function analysis (short-circuit chamber in colonoids) in response to Elexacaftor/Tezacaftor/Ivacaftor (ETI) with the clinical benefits of in vivo treatment with ETI in ten CF subjects. We found that the functional response of ETI-corrected PDROS significantly correlated with the absolute change in the sweat chloride test. Thus, our work reinforces the use of organoid-derived human intestinal monolayers to guide clinicians in selecting CFTR-targeted therapies.