Long-term follow-up of IPEX syndrome patients after different therapeutic strategies: An international multicenter retrospective study - 07/03/18
on behalf of the
Primary Immune Deficiency Treatment Consortium (PIDTC) and the Inborn Errors Working Party (IEWP) of the European Society for Blood and Marrow Transplantation (EBMT)
Abstract |
Background |
Immunodysregulation polyendocrinopathy enteropathy x-linked (IPEX) syndrome is a monogenic autoimmune disease caused by FOXP3 mutations. Because it is a rare disease, the natural history and response to treatments, including allogeneic hematopoietic stem cell transplantation (HSCT) and immunosuppression (IS), have not been thoroughly examined.
Objective |
This analysis sought to evaluate disease onset, progression, and long-term outcome of the 2 main treatments in long-term IPEX survivors.
Methods |
Clinical histories of 96 patients with a genetically proven IPEX syndrome were collected from 38 institutions worldwide and retrospectively analyzed. To investigate possible factors suitable to predict the outcome, an organ involvement (OI) scoring system was developed.
Results |
We confirm neonatal onset with enteropathy, type 1 diabetes, and eczema. In addition, we found less common manifestations in delayed onset patients or during disease evolution. There is no correlation between the site of mutation and the disease course or outcome, and the same genotype can present with variable phenotypes. HSCT patients (n = 58) had a median follow-up of 2.7 years (range, 1 week-15 years). Patients receiving chronic IS (n = 34) had a median follow-up of 4 years (range, 2 months-25 years). The overall survival after HSCT was 73.2% (95% CI, 59.4-83.0) and after IS was 65.1% (95% CI, 62.8-95.8). The pretreatment OI score was the only significant predictor of overall survival after transplant (P = .035) but not under IS.
Conclusions |
Patients receiving chronic IS were hampered by disease recurrence or complications, impacting long-term disease-free survival. When performed in patients with a low OI score, HSCT resulted in disease resolution with better quality of life, independent of age, donor source, or conditioning regimen.
Le texte complet de cet article est disponible en PDF.Graphical abstract |
Key words : IPEX, primary immune deficiency, FOXP3, Treg cells, hematopoietic stem cell transplantation, immunosuppression, rapamycin, enteropathy, neonatal diabetes, genetic autoimmunity
Abbreviations used : DFS, FKH, GvHD, HSCT, IPEX, IS, OI, RIT, T1D, Treg
Plan
This work has been supported by Telethon (Tele10-A4 to R.B.), the Jeffrey Modell Foundation Travel Award to F.B., and a generous gift to the Stanford Center for Genetic Immune Diseases. |
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Disclosure of potential conflict of interest: E. Gambineri serves as a consultant for Baxalta/Shire. M. Cavazzana receives grant support from the Institut National de la Santé et de la Recherche Médicale/Assistance Publique-Hôpitaux de Paris–European Research Council (ERC) Advanced Grant. W. Qasim receives grant support from the National Institute of Health Research, Cellectis SA, Cellmedica, Bellicum and Autolus; serves as a consultant for Autolus Ltd and Servier; receives royalties from Orchard; owns stock options for Autolus. M. H. Albert serves as a consultant for GlaxoSmithKline; receives grant support from GlaxoSmithKline; receives payment for lectures from MSD and Jazz; holds stock options for Amgen, Bristol-Myers S, and Juno; and receives travel support from Jazz and Medac. F. Haerynck receives grant support from Jeffery Modell Foundation (JMF) Diagnostic and Research Centre. C. Dhooge receives payment for lectures for nurses; travel support for Society for industrial and organizational psychology (SIOP), European Society for Blood and Marrow Transplantation, and European Musculo-Skeletal Oncology Society meetings. R. G. Bredius. E. Haddad serves as a consultant for Leadiant; and receives grant support from CSL Behring. S.-Y. Pai receives grant support from the Boston Children's Hospital. F. Goldman serves as a consultant for Jazz Pharmaceuticals; receives grant support from the Department of Defense; and payment for lectures from Jazz Pharmaceuticals. M. J. Cowan receives grant support from the National Institutes of Health–National Institute of Allergy and Infectious Diseases and California Institute of Regenerative Medicine; serves on the board for Bluebird Bio, Exogen Bio, and Homology Medicine; holds a patent for lentiviral vector; and has stock options with Homology Medicine and Exogen Bio. The rest of the authors declare that they have no relevant conflicts of interest. |
Vol 141 - N° 3
P. 1036 - mars 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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