Abstract:
:Despite the importance of Th17 cells in autoimmune diseases, it remains unclear how they control other inflammatory cells in autoimmune tissue damage. Using a model of spontaneous autoimmune arthritis, we showed that arthritogenic Th17 cells stimulated fibroblast-like synoviocytes via interleukin-17 (IL-17) to secrete the cytokine GM-CSF and also expanded synovial-resident innate lymphoid cells (ILCs) in inflamed joints. Activated synovial ILCs, which expressed CD25, IL-33Ra, and TLR9, produced abundant GM-CSF upon stimulation by IL-2, IL-33, or CpG DNA. Loss of GM-CSF production by either ILCs or radio-resistant stromal cells prevented Th17 cell-mediated arthritis. GM-CSF production by Th17 cells augmented chronic inflammation but was dispensable for the initiation of arthritis. We showed that GM-CSF-producing ILCs were present in inflamed joints of rheumatoid arthritis patients. Thus, a cellular cascade of autoimmune Th17 cells, ILCs, and stromal cells, via IL-17 and GM-CSF, mediates chronic joint inflammation and can be a target for therapeutic intervention.
journal_name
Immunityjournal_title
Immunityauthors
Hirota K,Hashimoto M,Ito Y,Matsuura M,Ito H,Tanaka M,Watanabe H,Kondoh G,Tanaka A,Yasuda K,Kopf M,Potocnik AJ,Stockinger B,Sakaguchi N,Sakaguchi Sdoi
10.1016/j.immuni.2018.04.009subject
Has Abstractpub_date
2018-06-19 00:00:00pages
1220-1232.e5issue
6eissn
1074-7613issn
1097-4180pii
S1074-7613(18)30146-8journal_volume
48pub_type
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