IL-1 receptor antagonist-deficient mice develop autoimmune arthritis due to intrinsic activation of IL-17-producing CCR2(+)Vγ6(+)γδ T cells

Aoi Akitsu; Harumichi Ishigame; Shigeru Kakuta; Soo-Hyun Chung; Satoshi Ikeda; Kenji Shimizu; Sachiko Kubo; Yang Liu; Masayuki Umemura; Goro Matsuzaki; Yasunobu Yoshikai; Shinobu Saijo; Yoichiro Iwakura

doi:10.1038/ncomms8464

IL-1 receptor antagonist-deficient mice develop autoimmune arthritis due to intrinsic activation of IL-17-producing CCR2(+)Vγ6(+)γδ T cells

Nat Commun. 2015 Jun 25:6:7464. doi: 10.1038/ncomms8464.

Authors

Affiliations

¹ 1] Laboratory of Molecular Pathogenesis, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [2] Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0032, Japan [3] Research Fellow of the Japan Society for the Promotion of Science (JSPS), Tokyo 102-0083, Japan [4] Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Saitama 332-0012, Japan [5] Division of Experimental Animal Immunology, Center for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba 278-0022, Japan.
² Laboratory of Molecular Pathogenesis, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan.
³ 1] Laboratory of Molecular Pathogenesis, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [2] Division of Experimental Animal Immunology, Center for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba 278-0022, Japan.
⁴ Tropical Biosphere Research Center, University of the Ryukyus, Okinawa 903-0213, Japan.
⁵ Research Center for Prevention of Infectious Diseases, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan.
⁶ 1] Laboratory of Molecular Pathogenesis, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [2] Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0032, Japan [3] Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Saitama 332-0012, Japan [4] Division of Experimental Animal Immunology, Center for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba 278-0022, Japan.

Abstract

Interleukin-17 (IL-17)-producing γδ T (γδ17) cells have been implicated in inflammatory diseases, but the underlying pathogenic mechanisms remain unclear. Here, we show that both CD4(+) and γδ17 cells are required for the development of autoimmune arthritis in IL-1 receptor antagonist (IL-1Ra)-deficient mice. Specifically, activated CD4(+) T cells direct γδ T-cell infiltration by inducing CCL2 expression in joints. Furthermore, IL-17 reporter mice reveal that the Vγ6(+) subset of CCR2(+) γδ T cells preferentially produces IL-17 in inflamed joints. Importantly, because IL-1Ra normally suppresses IL-1R expression on γδ T cells, IL-1Ra-deficient mice exhibit elevated IL-1R expression on Vγ6(+) cells, which play a critical role in inducing them to produce IL-17. Our findings demonstrate a pathogenic mechanism in which adaptive and innate immunity induce an autoimmune disease in a coordinated manner.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Arthritis / immunology*
Arthritis / metabolism
Autoimmune Diseases / metabolism*
Chemokine CCL2 / genetics
Chemokine CCL2 / metabolism
Gene Expression Regulation / immunology
Interleukin 1 Receptor Antagonist Protein / genetics
Interleukin 1 Receptor Antagonist Protein / metabolism*
Interleukin-17 / genetics
Interleukin-17 / metabolism*
Joints / metabolism
Joints / pathology
Lymphocyte Activation / physiology*
Mice
Mice, Knockout
Receptors, Antigen, T-Cell, gamma-delta
Receptors, Interleukin-1 Type I / genetics
Receptors, Interleukin-1 Type I / metabolism
T-Lymphocyte Subsets / immunology
T-Lymphocyte Subsets / physiology*

Substances

Ccl2 protein, mouse
Chemokine CCL2
IL1R1 protein, mouse
Il1rn protein, mouse
Interleukin 1 Receptor Antagonist Protein
Interleukin-17
Receptors, Antigen, T-Cell, gamma-delta
Receptors, Interleukin-1 Type I