CX3CR1+ Macrophages and CD8+ T Cells Control Intestinal IgA Production.
J Immunol
; 201(4): 1287-1294, 2018 08 15.
Article
de En
| MEDLINE
| ID: mdl-29987162
ABSTRACT
Secretory IgA is a key host defense mechanism that controls the intestinal microbiota. We investigated the role of CD11c+CX3CR1+CD64+ macrophages in IgA production in the intestine. Intestinal CX3CR1+ macrophages directly induced IgA secretion by B cells. Ag delivery to lamina propria (LP) CX3CR1+ macrophages specifically induced intestinal IgA production. The induction of IgA by CX3CR1+ macrophages required BAFF, a proliferation-inducing ligand, and TNF-α, but was surprisingly independent of TLR-mediated microbial recognition and retinoic acid signaling. IgA secretion by CX3CR1+ macrophages was enhanced by LP CD8+ T cells through the secretion of IL-9 and IL-13. CX3CR1+ macrophages and CD8+ T cells induced IgA production by B cells independently of mesenteric lymph nodes and Peyer patches. Our data reveal a previously unrecognized cellular circuitry in which LP CX3CR1+ macrophages, B cells, and CD8+ T cells coordinate the protective Ig secretion in the small intestine upon peripheral Ag delivery.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Immunoglobuline A sécrétoire
/
Lymphocytes T CD8/
/
Muqueuse intestinale
/
Macrophages
Limites:
Animals
Langue:
En
Journal:
J Immunol
Année:
2018
Type de document:
Article