Hematopoietic stem cell transplantation for progressive combined immunodeficiency and lymphoproliferation in patients with activated phosphatidylinositol-3-OH kinase δ syndrome type 1
- PMID: 29778502
- DOI: 10.1016/j.jaci.2018.04.032
Hematopoietic stem cell transplantation for progressive combined immunodeficiency and lymphoproliferation in patients with activated phosphatidylinositol-3-OH kinase δ syndrome type 1
Abstract
Background: Activated phosphatidylinositol-3-OH kinase δ syndrome type 1 (APDS1) is a recently described primary immunodeficiency syndrome characterized by recurrent respiratory tract infections, lymphoid hyperplasia, and Herpesviridae infections caused by germline gain-of-function mutations of PIK3CD. Hematopoietic stem cell transplantation (HSCT) can be considered to ameliorate progressive immunodeficiency and associated malignancy, but appropriate indications, methods, and outcomes of HSCT for APDS1 remain undefined.
Objective: Our objective was to analyze the clinical manifestations, laboratory findings, prognosis, and treatment of APDS1 and explore appropriate indications and methods of HSCT.
Methods: We reviewed retrospectively the medical records of cohorts undergoing HSCT at collaborating facilities.
Results: Thirty-year overall survival was 86.1%, but event-free survival was 39.6%. Life-threatening events, such as severe infections or lymphoproliferation, were frequent in childhood and adolescence and were common indications for HSCT. Nine patients underwent HSCT with fludarabine-based reduced-intensity conditioning. Seven patients survived after frequent adverse complications and engraftment failure. Most symptoms improved after HSCT.
Conclusion: Patients with APDS1 showed variable clinical manifestations. Life-threatening progressive combined immunodeficiency and massive lymphoproliferation were common indications for HSCT. Fludarabine-based reduced-intensity conditioning-HSCT ameliorated clinical symptoms, but transplantation-related complications were frequent, including graft failure.
Keywords: Activated phosphatidylinositol-3-OH kinase δ syndrome type 1; IgG(2); PIK3CD; T-cell receptor excision circle; combined immunodeficiency; hematopoietic stem cell transplantation; kappa-deleting recombination excision circle.
Copyright © 2018 American Academy of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.
Comment in
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Hematopoietic stem cell transplantation for activated phosphoinositide 3-kinase δ syndrome: Who, when, and how?J Allergy Clin Immunol. 2019 Jan;143(1):91-93. doi: 10.1016/j.jaci.2018.08.039. Epub 2018 Sep 12. J Allergy Clin Immunol. 2019. PMID: 30218677 Free PMC article. No abstract available.
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