FcγRI is required for TGFß2-treated macrophage-induced tolerance.
Immunobiology
; 218(9): 1200-6, 2013 Sep.
Article
em En
| MEDLINE
| ID: mdl-23643295
ABSTRACT
Macrophages treated with TGFß2 (TGFß2-MÏ) and antigen are highly tolerogenic in vivo, and induce antigen-specific and long-lasting tolerance in both naïve and primed mice via induction of suppressor/regulatory T cells. In this study, we examined the molecular pathways, including the requirements for Smad-dependent signaling, that are involved in the induction and function of tolerogenic TGFß2-MÏ. Treatment of murine macrophages with TGFß2 induced translocation of Smad2/3 to the nucleus, and impairment of Smad3-, but not Smad2-, dependent signaling inhibited the tolerogenic function of a TGFß2-treated murine macrophage cell line. Gene expression in murine macrophages treated with TGFß2 was evaluated by microarray analysis. The FcγRI gene was one of a number of immune-related genes differentially expressed in TGFß2-MÏ, and appeared to be critical for tolerance in this system, since TGFß2-MÏ from FcγRI deficient mice were unable to induce tolerance. The role that FcγRI plays in TGFß2-MÏ-mediated tolerance is currently unclear. The results of this study provide important information about the factors that are critical for the induction of TGFß2-MÏ-mediated tolerance, and a better understanding of these mechanisms could lead to the development of more effective tolerance-inducing strategies for the treatment of autoimmune/inflammatory diseases.
Palavras-chave
ACAID; ANOVA; APC; Antigen presenting cells; CFA; DN; DTH; Delayed type hypersensitivity; FcγR; LPS; Macrophages; Mice; MÏ; MÏ59; OVA; PEC; TGFß; Tolerance; WT; analysis of variance; anterior chamber-associated immune deviation; antigen presenting cells; complete Freund's adjuvant; delayed type hypersensitivity; dominant negative; i.v.; intravenous; lipopolysaccharide; macrophage; macrophage hybridoma cell line; ovalbumin; peritoneal exudates cells; s.c.; subcutaneous; transforming growth factor ß; wild-type
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Receptores de IgG
/
Linfócitos T Reguladores
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Fator de Crescimento Transformador beta2
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Tolerância Imunológica
/
Macrófagos
Limite:
Animals
Idioma:
En
Revista:
Immunobiology
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Estados Unidos