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CD11c-mediated deletion of Flip promotes autoreactivity and inflammatory arthritis.


ABSTRACT: Dendritic cells (DCs) are critical for immune homeostasis. To target DCs, we generated a mouse line with Flip deficiency in cells that express cre under the CD11c promoter (CD11c-Flip-KO). CD11c-Flip-KO mice spontaneously develop erosive, inflammatory arthritis, resembling rheumatoid arthritis, which is dramatically reduced when these mice are crossed with Rag(-/-) mice. The CD8α(+) DC subset is significantly reduced, along with alterations in NK cells and macrophages. Autoreactive CD4(+) T cells and autoantibodies specific for joint tissue are present, and arthritis severity correlates with the number of autoreactive CD4(+) T cells and plasmablasts in the joint-draining lymph nodes. Reduced T regulatory cells (Tregs) inversely correlate with arthritis severity, and the transfer of Tregs ameliorates arthritis. This KO line identifies a model that will permit in depth interrogation of the pathogenesis of rheumatoid arthritis, including the role of CD8α(+) DCs and other cells of the immune system.

SUBMITTER: Huang QQ 

PROVIDER: S-EPMC4429912 | biostudies-literature | 2015 May

REPOSITORIES: biostudies-literature

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CD11c-mediated deletion of Flip promotes autoreactivity and inflammatory arthritis.

Huang Qi-Quan QQ   Perlman Harris H   Birkett Robert R   Doyle Renee R   Fang Deyu D   Haines G Kenneth GK   Robinson William W   Datta Syamal S   Huang Zan Z   Li Quan-Zhen QZ   Phee Hyewon H   Pope Richard M RM  

Nature communications 20150512


Dendritic cells (DCs) are critical for immune homeostasis. To target DCs, we generated a mouse line with Flip deficiency in cells that express cre under the CD11c promoter (CD11c-Flip-KO). CD11c-Flip-KO mice spontaneously develop erosive, inflammatory arthritis, resembling rheumatoid arthritis, which is dramatically reduced when these mice are crossed with Rag(-/-) mice. The CD8α(+) DC subset is significantly reduced, along with alterations in NK cells and macrophages. Autoreactive CD4(+) T cell  ...[more]

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