IL-1beta and IL-2 convert human Treg into T(H)17 cells.
Clin Immunol
; 131(2): 298-307, 2009 May.
Article
de En
| MEDLINE
| ID: mdl-19211307
ABSTRACT
Natural CD4(+)CD25(+) regulatory T cells (Treg) and interleukin 17 (IL-17)-producing T helper cells (T(H)17) carry out opposite functions, the former maintaining self-tolerance and the latter being involved in inflammation and autoimmunity. We report here that stimulation of human Natural Treg under T(H)17 polarizing conditions in the presence of IL-2 converts them into T(H)17 cells. Conversion of Tregs into T(H)17 cells occurs both from natural naïve Tregs (NnTregs) and, to a higher extent, from memory Tregs (MTregs). Among antigen presenting cells, fresh monocytes activated by microbial stimuli were the most efficient inducers of T(H)17 cells from Tregs. Conversion of Treg into T(H)17 cells was induced by IL-1beta and involved down-regulation of the Treg lineage transcription factor FOXP3 and suppressive functions. Our results indicate that, under inflammatory conditions, in the presence of IL-2, Treg can be converted into pro-inflammatory T(H)17 cells and establish a functional link between inflammation and autoimmunity.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Adjuvants immunologiques
/
Interleukine-2
/
Lymphocytes T régulateurs
/
Interleukine-17
/
Interleukine-1 bêta
Limites:
Humans
Langue:
En
Journal:
Clin Immunol
Sujet du journal:
ALERGIA E IMUNOLOGIA
Année:
2009
Type de document:
Article
Pays d'affiliation:
France