Inherited human ITK deficiency impairs IFN-γ immunity and underlies tuberculosis.
J Exp Med
; 220(1)2023 01 02.
Article
en En
| MEDLINE
| ID: mdl-36326697
Inborn errors of IFN-γ immunity can underlie tuberculosis (TB). We report three patients from two kindreds without EBV viremia or disease but with severe TB and inherited complete ITK deficiency, a condition associated with severe EBV disease that renders immunological studies challenging. They have CD4+ αß T lymphocytopenia with a concomitant expansion of CD4-CD8- double-negative (DN) αß and Vδ2- γδ T lymphocytes, both displaying a unique CD38+CD45RA+T-bet+EOMES- phenotype. Itk-deficient mice recapitulated an expansion of the γδ T and DN αß T lymphocyte populations in the thymus and spleen, respectively. Moreover, the patients' T lymphocytes secrete small amounts of IFN-γ in response to TCR crosslinking, mitogens, or forced synapse formation with autologous B lymphocytes. Finally, the patients' total lymphocytes secrete small amounts of IFN-γ, and CD4+, CD8+, DN αß T, Vδ2+ γδ T, and MAIT cells display impaired IFN-γ production in response to BCG. Inherited ITK deficiency undermines the development and function of various IFN-γ-producing T cell subsets, thereby underlying TB.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
3_ND
Problema de salud:
3_neglected_diseases
/
3_tuberculosis
Asunto principal:
Tuberculosis
/
Receptores de Antígenos de Linfocitos T gamma-delta
Límite:
Animals
/
Humans
Idioma:
En
Revista:
J Exp Med
Año:
2023
Tipo del documento:
Article