Characterizing T cells in SCID patients presenting with reactive or residual T lymphocytes.
Clin Dev Immunol
; 2012: 261470, 2012.
Article
em En
| MEDLINE
| ID: mdl-23243423
ABSTRACT
INTRODUCTION:
Patients with severe combined immunodeficiency (SCID) may present with residual circulating T cells. While all cells are functionally deficient, resulting in high susceptibility to infections, only some of these cells are causing autoimmune symptoms.METHODS:
Here we compared T-cell functions including the number of circulating CD3(+) T cells, in vitro responses to mitogens, T-cell receptor (TCR) repertoire, TCR excision circles (TREC) levels, and regulatory T cells (Tregs) enumeration in several immunodeficinecy subtypes, clinically presenting with nonreactive residual cells (MHC-II deficiency) or reactive cells. The latter includes patients with autoreactive clonal expanded T cell and patients with alloreactive transplacentally maternal T cells.RESULTS:
MHC-II deficient patients had slightly reduced T-cell function, normal TRECs, TCR repertoires, and normal Tregs enumeration. In contrast, patients with reactive T cells exhibited poor T-cell differentiation and activity. While the autoreactive cells displayed significantly reduced Tregs numbers, the alloreactive transplacentally acquired maternal lymphocytes had high functional Tregs.CONCLUSION:
SCID patients presenting with circulating T cells show different patterns of T-cell activity and regulatory T cells enumeration that dictates the immunodeficient and autoimmune manifestations. We suggest that a high-tolerance capacity of the alloreactive transplacentally acquired maternal lymphocytes represents a toleration advantage, yet still associated with severe immunodeficiency.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Imunodeficiência Combinada Severa
/
Linfócitos T Reguladores
Limite:
Humans
/
Infant
Idioma:
En
Revista:
Clin Dev Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Israel