IL-27 attenuates IL-23 mediated inflammatory arthritis.

Interleukin 27 has both pro-inflammatory and anti-inflammatory properties in autoimmunity. The anti-inflammatory effects of IL-27 are linked with inhibition of Th17 differentiation but the IL-27 effect on myeloid cells is less studied. Herein we demonstrate that IL-27 inhibits IL-23-induced inflammation associated not only with Th17 cells but also with myeloid cell infiltration in the joints and splenic myeloid populations of CD11b+ GR1+ and CD3-CD11b+CD11c-GR1- cells. The IL-27 anti-inflammatory response was associated with reduced levels of myeloid cells in the spleen and bone marrow. Overall, our data demonstrate that IL-27 has an immunosuppressive role that affects IL-23-dependent myelopoiesis in the bone marrow and its progression to inflammatory arthritis and plays a crucial role in controlling IL-23 driven joint inflammation by negatively regulating the expansion of myeloid cell subsets. Copyright © 2023 Elsevier Inc. All rights reserved.

Citation

Ritu Sarin, Ran Gu, Zahra Jalali, Emanual Maverakis, Maria G Tsokos, Iannis E Adamopoulos. IL-27 attenuates IL-23 mediated inflammatory arthritis. Clinical immunology (Orlando, Fla.). 2023 Jun;251:109327

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PMID: 37037268

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