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© Research
Publication : The Journal of experimental medicine

Dual T cell- and B cell-intrinsic deficiency in humans with biallelic RLTPR mutations

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of experimental medicine - 19 Sep 2016

Wang Y, Ma CS, Ling Y, Bousfiha A, Camcioglu Y, Jacquot S, Payne K, Crestani E, Roncagalli R, Belkadi A, Kerner G, Lorenzo L, Deswarte C, Chrabieh M, Patin E, Vincent QB, Müller-Fleckenstein I, Fleckenstein B, Ailal F, Quintana-Murci L, Fraitag S, Alyanakian MA, Leruez-Ville M, Picard C, Puel A, Bustamante J, Boisson-Dupuis S, Malissen M, Malissen B, Abel L, Hovnanian A, Notarangelo LD, Jouanguy E, Tangye SG, Béziat V, Casanova JL

Link to Pubmed [PMID] – 27647349

J. Exp. Med. 2016 10;213(11):2413-2435

Combined immunodeficiency (CID) refers to inborn errors of human T cells that also affect B cells because of the T cell deficit or an additional B cell-intrinsic deficit. In this study, we report six patients from three unrelated families with biallelic loss-of-function mutations in RLTPR, the mouse orthologue of which is essential for CD28 signaling. The patients have cutaneous and pulmonary allergy, as well as a variety of bacterial and fungal infectious diseases, including invasive tuberculosis and mucocutaneous candidiasis. Proportions of circulating regulatory T cells and memory CD4 T cells are reduced. Their CD4 T cells do not respond to CD28 stimulation. Their CD4 T cells exhibit a “Th2” cell bias ex vivo and when cultured in vitro, contrasting with the paucity of “Th1,” “Th17,” and T follicular helper cells. The patients also display few memory B cells and poor antibody responses. This B cell phenotype does not result solely from the T cell deficiency, as the patients’ B cells fail to activate NF-κB upon B cell receptor (BCR) stimulation. Human RLTPR deficiency is a CID affecting at least the CD28-responsive pathway in T cells and the BCR-responsive pathway in B cells.

https://www.ncbi.nlm.nih.gov/pubmed/27647349