The lymphotoxin LTalpha(1)beta(2) controls postnatal and adult spleen marginal sinus vascular structure and function.
Immunity
; 30(3): 408-20, 2009 Mar 20.
Article
em En
| MEDLINE
| ID: mdl-19303389
ABSTRACT
The lymphotoxin LTalpha(1)beta(2) supports the development and maintenance of several aspects of spleen structure, but its significance for marginal sinus (MS) vascular organization is unclear. We showed here that, in early postnatal lymphotoxin-deficient mice, the developing Flk-1+ white pulp vessels failed to organize or upregulate MAdCAM-1, leading to altered spatial rearrangement of both the white pulp endothelial cells and the smooth muscle actin-expressing cells. In vitro, MAdCAM-1 directed the reorganization of LTbeta receptor+ endothelial cells grown on Matrigel. LTalpha(1)beta(2) also regulated the maintenance of both MAdCAM-1 expression and mature MS structure in adult mice, contributing importantly to normal trafficking of CD11b+ cells in response to bacterial antigens. Together, our studies demonstrate that LTalpha(1)beta(2) and LTbeta receptor signals control proper development and maintenance of the mature MS structure and implicate MAdCAM-1 in the structuring of the MS endothelial cells that is important for the movement of immune cells within the spleen.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Baço
/
Heterotrímero de Linfotoxina alfa1 e beta2
Limite:
Animals
Idioma:
En
Revista:
Immunity
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Estados Unidos