Reference : Cytotoxic T-lymphocyte-associated protein 4-Ig effectively controls immune activation...
Scientific journals : Article
Human health sciences : Immunology & infectious disease
http://hdl.handle.net/2268/208166
Cytotoxic T-lymphocyte-associated protein 4-Ig effectively controls immune activation and inflammatory disease in a novel murine model of leaky severe combined immunodeficiency
English
Humblet-Baron, Stephanie [> >]
Schönefeldt, Susan [> >]
Garcia-Perez, Josselyn E [> >]
Baron, Frédéric mailto [Université de Liège > > GIGA-R : Hématologie >]
Pasciuto, Emanuela [> >]
Liston, Adrian [> >]
Nov-2017
Journal of Allergy and Clinical Immunology (The)
Mosby
140
5
1394-1403.e8
Yes (verified by ORBi)
International
0091-6749
1097-6825
St Louis
MO
[en] leaky-SCID ; Treg ; Artemis ; immune dysregulation ; regulatory T cell ; cytotoxic T-lymphocyte-associated protein 4 ; Leaky severe combined immunodeficiency ; CTLA4
[en] BACKGROUND: Severe combined immunodeficiency can be caused by loss-of-function mutations in genes involved in the DNA recombination machinery, such as recombination-activating gene 1 (RAG1), RAG2, or DNA cross-link repair 1C (DCLRE1C). Defective DNA recombination causes a developmental block in T and B cells, resulting in high susceptibility to infections. Hypomorphic mutations in the same genes can also give rise to a partial loss of T cells in a spectrum including leaky severe combined immunodeficiency (LS) and Omenn syndrome (OS). These patients not only experience life-threatening infections because of immunodeficiency but also experience inflammatory/autoimmune conditions caused by the presence of autoreactive T cells. OBJECTIVE: We sought to develop a preclinical model that fully recapitulates the symptoms of patients with LS/OS, including a model for testing therapeutic intervention. METHODS: We generated a novel mutant mouse (Dclre1cleaky) that develops a LS phenotype. Mice were monitored for diseases, and immune phenotype and immune function were evaluated by using flow cytometry, ELISA, and histology. RESULTS: Dclre1cleaky mice present with a complete blockade of B-cell differentiation, with a leaky block in T-cell differentiation resulting in an oligoclonal T-cell receptor repertoire and enhanced cytokine secretion. Dclre1cleaky mice also had inflammatory symptoms, including wasting, dermatitis, colitis, hypereosinophilia, and high IgE levels. Development of a preclinical murine model for LS allowed testing of potential treatment, with administration of cytotoxic T-lymphocyte-associated protein 4-Ig reducing disease symptoms and immunologic disturbance, resulting in increased survival. CONCLUSION: These data suggest that cytotoxic T-lymphocyte-associated protein 4-Ig should be evaluated as a potential treatment of inflammatory symptoms in patients with LS and those with OS.
Researchers
http://hdl.handle.net/2268/208166
also: http://hdl.handle.net/2268/215715
10.1016/j.jaci.2016.12.968
Copyright (c) 2017 American Academy of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.

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