Impaired function of dendritic cells in alymphoplasia (aly/aly) mice for expansion of CD25+CD4+regulatory T cells

Autor: Mutsuhiko Minami, Chizuru Tamura, Masaki Kasahara, Chie Hotta, Fumitaka Sato, Masatoshi Nakazawa, Masahiro Yoshinari
Rok vydání: 2006
Předmět:
Zdroj: Autoimmunity. 39:445-453
ISSN: 1607-842X
0891-6934
Popis: Alymphoplasia (aly/aly) mice are from a naturally occurring strain with a mutation in nuclear factor-kappa B inducing kinase (NIK). The NIK mutation causes disruption of the architecture of the thymus and spleen and aly/aly mice show decreased numbers of CD25+CD4+T cells in the spleen. For the expansion of CD25+CD4+T cells, interactions between dendritic cells (DCs) and CD25+CD4+ regulatory T cells are necessary. We investigated the ability of DCs to induce expansion of CD25+CD4+T cells. We found that DCs are reduced in the spleen of aly/aly mice, and showed low expressions of CD80, CD86 and MHC class II molecules on the surface. DCs from aly/aly mice showed decreased ability to present ovalbumin (OVA) to T cells from OVA specific TCR transgenic mice, and a decreased ability for alloantigen presentation. Further, DCs showed a decreased ability to induce expansion of CD25+CD4+T cells in vitro. Our results suggested that the impairment of DCs in aly/aly mice is responsible, at least in part, for the decreased numbers of CD25+CD4+T cells in the periphery of aly/aly mice.
Databáze: OpenAIRE
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