1. The immunopathological landscape of human pre-TCRα deficiency: From rare to common variants.
- Author
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Materna M, Delmonte OM, Bosticardo M, Momenilandi M, Conrey PE, Charmeteau-De Muylder B, Bravetti C, Bellworthy R, Cederholm A, Staels F, Ganoza CA, Darko S, Sayed S, Le Floc'h C, Ogishi M, Rinchai D, Guenoun A, Bolze A, Khan T, Gervais A, Krüger R, Völler M, Palterer B, Sadeghi-Shabestari M, Langlois de Septenville A, Schramm CA, Shah S, Tello-Cajiao JJ, Pala F, Amini K, Campos JS, Lima NS, Eriksson D, Lévy R, Seeleuthner Y, Jyonouchi S, Ata M, Al Ali F, Stittrich A, Deswarte C, Pereira A, Mégret J, Le Voyer T, Bastard P, Berteloot L, Dussiot M, Vladikine N, Cardenas PP, Jouanguy E, Alqahtani M, Hasan A, Thanaraj TA, Rosain J, Al Qureshah F, Sabato V, Alyanakian MA, Leruez-Ville M, Rozenberg F, Haddad E, Regueiro JR, Toribio ML, Kelsen JR, Salehi M, Nasiri S, Torabizadeh M, Rokni-Zadeh H, Changi-Ashtiani M, Vatandoost N, Moravej H, Akrami SM, Mazloomrezaei M, Cobat A, Meyts I, Toyofuku E, Nishimura M, Moriya K, Mizukami T, Imai K, Abel L, Malissen B, Al-Mulla F, Alkuraya FS, Parvaneh N, von Bernuth H, Beetz C, Davi F, Douek DC, Cheynier R, Langlais D, Landegren N, Marr N, Morio T, Shahrooei M, Schrijvers R, Henrickson SE, Luche H, Notarangelo LD, Casanova JL, and Béziat V
- Subjects
- Humans, Cell Differentiation, Homozygote, Loss of Function Mutation, Lymphocyte Count, Alleles, Infections immunology, Lymphoproliferative Disorders immunology, Pedigree, Male, Female, Middle Aged, Aged, Aged, 80 and over, Autoimmunity genetics, Intraepithelial Lymphocytes immunology, Receptors, Antigen, T-Cell, alpha-beta genetics, Membrane Glycoproteins genetics
- Abstract
We describe humans with rare biallelic loss-of-function PTCRA variants impairing pre-α T cell receptor (pre-TCRα) expression. Low circulating naive αβ T cell counts at birth persisted over time, with normal memory αβ and high γδ T cell counts. Their TCRα repertoire was biased, which suggests that noncanonical thymic differentiation pathways can rescue αβ T cell development. Only a minority of these individuals were sick, with infection, lymphoproliferation, and/or autoimmunity. We also report that 1 in 4000 individuals from the Middle East and South Asia are homozygous for a common hypomorphic PTCRA variant. They had normal circulating naive αβ T cell counts but high γδ T cell counts. Although residual pre-TCRα expression drove the differentiation of more αβ T cells, autoimmune conditions were more frequent in these patients compared with the general population.
- Published
- 2024
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