Sustained effectiveness of elexacaftor-tezacaftor-ivacaftor in lung transplant candidates with cystic fibrosis

Background: Elexacaftor-tezacaftor-ivacaftor induces rapid clinical improvement in patients with cystic fibrosis (CF) and advanced pulmonary disease, often leading to suspend the indication for lung transplantation. Yet no long-term data is available in lung transplant candidates. Methods: Lung transplant candidates (defined as being waitlisted for lung transplantation or considered for listing within 3 months) who have initiated elexacaftor-tezacaftor-ivacaftor were identified in the French cohort of patients with CF and advanced pulmonary disease. Patients were prospectively followed to evaluate treatment safety and effectiveness from initiation to July 20th, 2021. Results: Among the 331 patients with advanced CF pulmonary disease who initiated elexacaftor-tezacaftor-ivacaftor, 65 were lung transplant candidates (17 listed for transplantation, 48 considered for listing within 3 months). Median [IQR] follow-up time was 363 [329; 377] days. At the end of the follow-up period, two patients were transplanted five and 11 days following treatment initiation, two were listed for transplantation, and 61 no longer met transplantation criteria. Improvement in percent predicted forced expiratory volume in 1 s (ppFEV(1)) at one month was +13.4% (95% confidence interval, 10.3%-16.5%; P < 0.0001) and remained stable thereafter. Treatment burden decreased substantially, with an 86% decrease in the need for intravenous antibiotics, 59% for oxygen therapy and 62% for non-invasive ventilation. Conclusion: In lung transplant candidates eligible for elexacaftor-tezacaftor-ivacaftor, the rapid improvement following initiation of treatment persisted over one year with a reduction in treatment burden and lung transplantation could be safely deferred in most patients. (c) 2022 European Cystic Fibrosis Society. Published by Elsevier B.V. All rights reserved.