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Li J, Jin J, Li S, Zhong Y, Jin Y, Zhang X, Xia B, Zhu Y, Guo R, Sun X, Guo J, Hu F, Xiao W, Huang F, Ye H, Li R, Zhou Y, Xiang X, Yao H, Yan Q, Su L, Wu L, Luo T, Liu Y, Guo X, Qin J, Qi H, He J, Wang J, Li Z. Tonsillar Microbiome-Derived Lantibiotics Induce Structural Changes of IL-6 and IL-21 Receptors and Modulate Host Immunity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202706. [PMID: 36031409 PMCID: PMC9596850 DOI: 10.1002/advs.202202706] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Emerging evidence emphasizes the functional impacts of host microbiome on the etiopathogenesis of autoimmune diseases, including rheumatoid arthritis (RA). However, there are limited mechanistic insights into the contribution of microbial biomolecules especially microbial peptides toward modulating immune homeostasis. Here, by mining the metagenomics data of tonsillar microbiome, a deficiency of the encoding genes of lantibiotic peptides salivaricins in RA patients is identified, which shows strong correlation with circulating immune cells. Evidence is provided that the salivaricins exert immunomodulatory effects in inhibiting T follicular helper (Tfh) cell differentiation and interleukin-21 (IL-21) production. Mechanically, salivaricins directly bind to and induce conformational changes of IL-6 and IL-21 receptors, thereby inhibiting the bindings of IL-6 and IL-21 to their receptors and suppressing the downstream signaling pathway. Finally, salivaricin administration exerts both prophylactic and therapeutic effects against experimental arthritis in a murine model of RA. Together, these results provide a mechanism link of microbial peptides-mediated immunomodulation.
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Fang Y, Zhang Q, Yuan X, Lv C, Zhang J, Zhu Y, Wei Z, Xia Y, Dai Y. Tetrandrine, an immunosuppressive alkaloid isolated from
Steohania tetrandra
S. Moore, induces the generation of Treg cells through enhancing fatty acid oxidation. Immunology 2022; 166:492-506. [DOI: 10.1111/imm.13500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 04/23/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Yulai Fang
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Qin Zhang
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Xusheng Yuan
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Changjun Lv
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Jing Zhang
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Yanrong Zhu
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Zhifeng Wei
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Yufeng Xia
- Department of Pharmacognosy, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Yue Dai
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
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Abstract
Autoimmune diseases, such as rheumatoid arthritis, systematic lupus erythematosus and Sjögren's syndrome, are a group of diseases characterized by the activation of immune cells and excessive production of autoantibodies. Although the pathogenesis of these diseases is still not completely understood, studies have shown that multiple factors including genetics, environment and immune responses play important roles in the development and progression of the diseases. In China, there are great achievements in the mechanisms of autoimmune diseases during the last decades. These studies provide new insight to understand the diseases and also shed light on the development of novel therapy.
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Affiliation(s)
- Ru Li
- Department of Rheumatology & Immunology, Peking University People's Hospital, Beijing, China; Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China.
| | - Xing Sun
- Department of Rheumatology & Immunology, Peking University People's Hospital, Beijing, China; Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Xu Liu
- Department of Rheumatology & Immunology, Peking University People's Hospital, Beijing, China; Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Yue Yang
- Department of Rheumatology & Immunology, Peking University People's Hospital, Beijing, China; Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
| | - Zhanguo Li
- Department of Rheumatology & Immunology, Peking University People's Hospital, Beijing, China; Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis (BZ0135), Beijing, China
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Loughran ST, Power PA, Maguire PT, McQuaid SL, Buchanan PJ, Jonsdottir I, Newman RW, Harvey R, Johnson PA. Influenza infection directly alters innate IL-23 and IL-12p70 and subsequent IL-17A and IFN-γ responses to pneumococcus in vitro in human monocytes. PLoS One 2018; 13:e0203521. [PMID: 30192848 PMCID: PMC6128554 DOI: 10.1371/journal.pone.0203521] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 08/22/2018] [Indexed: 12/21/2022] Open
Abstract
IMPORTANCE Influenza virus is highly contagious and poses substantial public health problems due to its strong association with morbidity and mortality. Approximately 250,000-500,000 deaths are caused by seasonal influenza virus annually, and this figure increases during periods of pandemic infections. Most of these deaths are due to secondary bacterial pneumonia. Influenza-bacterial superinfection can result in hospitalisation and/or death of both patients with pre-existing lung disease or previously healthy individuals. The importance of our research is in determining that influenza and its component haemagglutinin has a direct effect on the classic pneumococcus induced pathways to IL-17A in our human ex vivo model. Our understanding of the mechanism which leaves people exposed to influenza infection during superinfection remain unresolved. This paper demonstrates that early infection of monocytes inhibits an arm of immunity crucial to bacterial clearance. Understanding this mechanism may provide alternative interventions in the case of superinfection with antimicrobial resistant strains of bacteria.
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Affiliation(s)
- Sinead T. Loughran
- Viral Immunology Laboratory, School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
| | - Patrick A. Power
- Viral Immunology Laboratory, School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
| | - Paula T. Maguire
- Viral Immunology Laboratory, School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
| | - Samantha L. McQuaid
- Viral Immunology Laboratory, School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
| | - Paul J. Buchanan
- Translational Cancer Physiology Laboratory, School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
| | - Ingileif Jonsdottir
- Department of Immunology, Landspitali, The National University Hospital of Iceland, Reykjavik, Iceland
| | - Robert W. Newman
- National Institute for Biological Standards and Controls, Potters Bar, Herts, United Kingdom
| | - Ruth Harvey
- National Institute for Biological Standards and Controls, Potters Bar, Herts, United Kingdom
| | - Patricia A. Johnson
- Viral Immunology Laboratory, School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
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Sauer EL, Trifilieff E, Greer JM. Predicting the effects of potentially therapeutic modified peptides on polyclonal T cell populations in a mouse model of multiple sclerosis. J Neuroimmunol 2017; 307:18-26. [PMID: 28495132 DOI: 10.1016/j.jneuroim.2017.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 02/23/2017] [Accepted: 03/15/2017] [Indexed: 10/19/2022]
Abstract
Altered peptide ligands (APLs) have routinely been studied in clonal populations of Th cells that express a single T cell receptor (TCR), but results generated in this manner poorly predict the effects of APLs on polyclonal Th cells in vivo, contributing to the failure of phase II clinical trials of APLs in autoimmune diseases such as multiple sclerosis (MS). We have used a panel of APLs derived from an encephalitogenic epitope of myelin proteolipid protein to investigate the relationship between antigen cross-reactivity in a polyclonal environment, encephalitogenicity, and the capacity of an APL to provide protection against experimental autoimmune encephalomyelitis (EAE) in SJL mice. In general, polyclonal Th cell lines specific for encephalitogenic APLs cross-reacted with other encephalitogenic APLs, but not with non-encephalitogenic APLs, and vice versa. This, alongside analysis of TCR Vβ usage, suggested that encephalitogenic and non-encephalitogenic subgroups of APLs expand largely non-cross-reactive Th cell populations. As an exception to the rule, one non-encephalitogenic APL, L188, induced proliferation in polyclonal CD4+ T cells specific for the native encephalitogen, with minimal induction of cytokine production. Co-immunization of L188 alongside the native encephalitogen slightly enhanced disease development. In contrast, another APL, A188, which induced IL-10 production without proliferation in CD4+ T cells specific for the native encephalitogen, was able to protect against development of EAE in a dose-dependent fashion when co-immunized alongside the native encephalitogen. These results suggest that testing against polyclonal Th cell lines in vitro may be an effective strategy for distinguishing between potentially therapeutic and non-therapeutic APLs.
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Affiliation(s)
- Evan L Sauer
- The University of Queensland, UQ Centre for Clinical Research, Brisbane, Australia
| | - Elisabeth Trifilieff
- Laboratoire d'Imagerie et de Neurosciences Cognitives (LINC), Université de Strasbourg/CNRS, France
| | - Judith M Greer
- The University of Queensland, UQ Centre for Clinical Research, Brisbane, Australia.
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Liu R, Moise L, Tassone R, Gutierrez AH, Terry FE, Sangare K, Ardito MT, Martin WD, De Groot AS. H7N9 T-cell epitopes that mimic human sequences are less immunogenic and may induce Treg-mediated tolerance. Hum Vaccin Immunother 2015; 11:2241-52. [PMID: 26090577 PMCID: PMC4635734 DOI: 10.1080/21645515.2015.1052197] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Avian-origin H7N9 influenza is a novel influenza A virus (IAV) that emerged in humans in China in 2013. Using immunoinformatics tools, we identified several H7N9 T cell epitopes with T cell receptor (TCR)-facing residues identical to those of multiple epitopes from human proteins. We hypothesized that host tolerance to these peptides may impair T helper response and contribute to the low titer, weak hemagglutination inhibiting (HI) antibody responses and diminished seroconversion rates that have been observed in human H7N9 infections and vaccine trials. We found that the magnitude of human T effector responses to individual H7N9 peptides was inversely correlated with the peptide's resemblance to self. Furthermore, a promiscuous T cell epitope from the hemagglutinin (HA) protein suppressed responses to other H7N9 peptides when co-administered in vitro. Along with other highly ‘human-like’ peptides from H7N9, this peptide was also shown to expand FoxP3+ regulatory T cells (Tregs). Thus, H7N9 may be camouflaged from effective human immune response by T cell epitope sequences that avert or regulate effector T cell responses through host tolerance.
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Affiliation(s)
- Rui Liu
- a Institute for Immunology and Informatics; University of Rhode Island ; Providence , RI USA
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Abstract
In the past two decades, Chinese rheumatology has developed rapidly in terms of both clinical practice and basic research. Many rheumatology departments and divisions have been established, creating positions for more residents to join rheumatology practices. Numerous studies of rheumatic diseases have been published in recent years by Chinese rheumatologists and immunologists, supported by government funding that has dramatically increased over the past few years. These studies are focused mainly on epidemiology, mechanisms, early diagnosis and interventions of rheumatic diseases. Increasing numbers of national and international scientific activities in China, including research collaborations, education programmes and conferences have greatly helped the development of rheumatology. In this APLAR series article, the major, high-impact studies and latest developments in Chinese rheumatology are reviewed.
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Abstract
In recent years, there have been many new developments in the field of regulatory T cells (Treg), challenging the consensus on their behaviour, classification and role(s) in disease. The role Treg might play in autoimmune disease appears to be more complex than previously thought. Here, we discuss the current knowledge of regulatory T cells through animal and human research and illustrate the recent developments in childhood autoimmune arthritis (juvenile idiopathic arthritis (JIA)). Furthermore, this review summarises our understanding of the fields and assesses current and future implications for Treg in the treatment of JIA.
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