Increased proportions of γδ T lymphocytes in atypical SCID associate with disease manifestations.

Increased proportions of γδ T lymphocytes in atypical SCID associate with disease manifestations. Clin Immunol. 2019 Feb 15;: Authors: Tometten I, Felgentreff K, Hönig M, Hauck F, Albert MH, Niehues T, Perez R, Ghosh S, Picard C, Stary J, Formankova R, Worth A, Soler-Palacín P, García-Prat M, Allende LM, Gonzalez-Granado LI, Stepensky P, Di Cesare S, Scarselli A, Cancrini C, Speckmann C, Gilmour K, Notarangelo L, Ehl S, Rohr J Abstract Severe combined immunodeficiencies (SCID) comprise a group of genetic diseases characterized by abrogated development of T lymphocytes. In some case reports of atypical SCID patients elevated proportions of γδ T lymphocytes have been reported. However, it is unknown whether these γδ T cells modulate or reflect the patient's clinical phenotype. We investigated the frequency of elevated γδ T cell proportions and associations with clinical disease manifestations in a cohort of 76 atypical SCID patients. Increased proportions of γδ T lymphocytes were present in approximately 60% of these patients. Furthermore, we identified positive correlations between elevated proportions of γδ T cells and the occurrence of CMV infections and autoimmune cytopenias. We discuss that CMV infections might trigger an expansion of γδ T lymphocytes, which could drive the development of autoimmune cytopenias. We advocate that atypical SCID patients should be screened for elevated proportions of γδ T lymphocyte...
Source: Clinical Immunology - Category: Allergy & Immunology Authors: Tags: Clin Immunol Source Type: research