Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals

Inhibitory cytokines, such as transforming growth factor-β (TGF-β) and interleukin-10 (IL-10), are humoral factors involved in the suppressive function of regulatory T cells and play critical roles in maintaining immune homeostasis. However, TGF-β and IL-10 also have pleiotropic effects and induce h...

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Main Authors: Toshihiko Komai, Mariko Inoue, Tomohisa Okamura, Kaoru Morita, Yukiko Iwasaki, Shuji Sumitomo, Hirofumi Shoda, Kazuhiko Yamamoto, Keishi Fujio
Format: Article
Language:English
Published: Frontiers Media S.A. 2018-06-01
Series:Frontiers in Immunology
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fimmu.2018.01364/full
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author Toshihiko Komai
Mariko Inoue
Tomohisa Okamura
Tomohisa Okamura
Tomohisa Okamura
Kaoru Morita
Yukiko Iwasaki
Shuji Sumitomo
Hirofumi Shoda
Kazuhiko Yamamoto
Kazuhiko Yamamoto
Kazuhiko Yamamoto
Keishi Fujio
author_facet Toshihiko Komai
Mariko Inoue
Tomohisa Okamura
Tomohisa Okamura
Tomohisa Okamura
Kaoru Morita
Yukiko Iwasaki
Shuji Sumitomo
Hirofumi Shoda
Kazuhiko Yamamoto
Kazuhiko Yamamoto
Kazuhiko Yamamoto
Keishi Fujio
author_sort Toshihiko Komai
collection DOAJ
description Inhibitory cytokines, such as transforming growth factor-β (TGF-β) and interleukin-10 (IL-10), are humoral factors involved in the suppressive function of regulatory T cells and play critical roles in maintaining immune homeostasis. However, TGF-β and IL-10 also have pleiotropic effects and induce humoral immune responses depending on conditions, and thus their therapeutic application to autoimmune diseases remains limited. Here, we show that a combination of TGF-β and IL-10, but not single cytokine, is required to suppress B cell activation induced by toll-like receptor (TLR) stimulation. In in vivo analyses, the simultaneous presence of TGF-β and IL-10 effectively suppressed TLR-mediated antigen-specific immune responses and ameliorated pathologies in imiquimod (TLR7 agonist)-induced lupus model and lupus-prone MRL/lpr mice. Intriguingly, TGF-β and IL-10 synergistically modulated transcriptional programs and suppressed cellular energetics of both glycolysis and oxidative phosphorylation via inhibition of the mammalian target of rapamycin complex 1 (mTORC1)/S6 kinase 1 (S6K1) pathway in TLR-stimulated B cells. On the other hand, enhancement of mTOR signaling and mitochondrial biosynthesis in TLR-stimulated B cells counteracted the synergistic inhibitory effects. The inhibitory cytokine synergy of TGF-β and IL-10 via suppression of energy metabolism was also observed in human TLR-stimulated B cells. There is increasing evidence supporting the importance of adequate metabolic signals in various immune cells to exert their immune function. In this study, we have shown that a previously unrecognized synergy of inhibitory cytokines regulates systemic humoral immune responses via modulating immunometabolism in B cells. Our findings indicate that inhibition of B cell metabolism mediated by two synergistic cytokines contributes to the induction of immune tolerance and could be a new therapeutic strategy for autoimmune diseases such as systemic lupus erythematosus.
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spelling doaj.art-5c6d586da84646909b16f84ed1dcb2ce2022-12-22T00:42:55ZengFrontiers Media S.A.Frontiers in Immunology1664-32242018-06-01910.3389/fimmu.2018.01364373187Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic SignalsToshihiko Komai0Mariko Inoue1Tomohisa Okamura2Tomohisa Okamura3Tomohisa Okamura4Kaoru Morita5Yukiko Iwasaki6Shuji Sumitomo7Hirofumi Shoda8Kazuhiko Yamamoto9Kazuhiko Yamamoto10Kazuhiko Yamamoto11Keishi Fujio12Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Functional Genomics and Immunological Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanMax Planck-The University of Tokyo Center for Integrative Inflammology, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanMax Planck-The University of Tokyo Center for Integrative Inflammology, The University of Tokyo, Tokyo, JapanLaboratory for Autoimmune Diseases, Center for Integrative Medical Sciences, RIKEN, Kanagawa, JapanDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, JapanInhibitory cytokines, such as transforming growth factor-β (TGF-β) and interleukin-10 (IL-10), are humoral factors involved in the suppressive function of regulatory T cells and play critical roles in maintaining immune homeostasis. However, TGF-β and IL-10 also have pleiotropic effects and induce humoral immune responses depending on conditions, and thus their therapeutic application to autoimmune diseases remains limited. Here, we show that a combination of TGF-β and IL-10, but not single cytokine, is required to suppress B cell activation induced by toll-like receptor (TLR) stimulation. In in vivo analyses, the simultaneous presence of TGF-β and IL-10 effectively suppressed TLR-mediated antigen-specific immune responses and ameliorated pathologies in imiquimod (TLR7 agonist)-induced lupus model and lupus-prone MRL/lpr mice. Intriguingly, TGF-β and IL-10 synergistically modulated transcriptional programs and suppressed cellular energetics of both glycolysis and oxidative phosphorylation via inhibition of the mammalian target of rapamycin complex 1 (mTORC1)/S6 kinase 1 (S6K1) pathway in TLR-stimulated B cells. On the other hand, enhancement of mTOR signaling and mitochondrial biosynthesis in TLR-stimulated B cells counteracted the synergistic inhibitory effects. The inhibitory cytokine synergy of TGF-β and IL-10 via suppression of energy metabolism was also observed in human TLR-stimulated B cells. There is increasing evidence supporting the importance of adequate metabolic signals in various immune cells to exert their immune function. In this study, we have shown that a previously unrecognized synergy of inhibitory cytokines regulates systemic humoral immune responses via modulating immunometabolism in B cells. Our findings indicate that inhibition of B cell metabolism mediated by two synergistic cytokines contributes to the induction of immune tolerance and could be a new therapeutic strategy for autoimmune diseases such as systemic lupus erythematosus.https://www.frontiersin.org/article/10.3389/fimmu.2018.01364/fullhumoral immunitysystemic lupus erythematosuscytokine synergytransforming growth factor-βinterleukin-10B cells
spellingShingle Toshihiko Komai
Mariko Inoue
Tomohisa Okamura
Tomohisa Okamura
Tomohisa Okamura
Kaoru Morita
Yukiko Iwasaki
Shuji Sumitomo
Hirofumi Shoda
Kazuhiko Yamamoto
Kazuhiko Yamamoto
Kazuhiko Yamamoto
Keishi Fujio
Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals
Frontiers in Immunology
humoral immunity
systemic lupus erythematosus
cytokine synergy
transforming growth factor-β
interleukin-10
B cells
title Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals
title_full Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals
title_fullStr Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals
title_full_unstemmed Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals
title_short Transforming Growth Factor-β and Interleukin-10 Synergistically Regulate Humoral Immunity via Modulating Metabolic Signals
title_sort transforming growth factor β and interleukin 10 synergistically regulate humoral immunity via modulating metabolic signals
topic humoral immunity
systemic lupus erythematosus
cytokine synergy
transforming growth factor-β
interleukin-10
B cells
url https://www.frontiersin.org/article/10.3389/fimmu.2018.01364/full
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