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Lamba A, Taneja V. Gut microbiota as a sensor of autoimmune response and treatment for rheumatoid arthritis. Immunol Rev 2024. [PMID: 38867408 DOI: 10.1111/imr.13359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Rheumatoid arthritis (RA) is considered a multifactorial condition where interaction between the genetic and environmental factors lead to immune dysregulation causing autoreactivity. While among the various genetic factors, HLA-DR4 and DQ8, have been reported to be the strongest risk factors, the role of various environmental factors has been unclear. Though events initiating autoreactivity remain unknown, a mucosal origin of RA has gained attention based on the recent observations with the gut dysbiosis in patients. However, causality of gut dysbiosis has been difficult to prove in humans. Mouse models, especially mice expressing RA-susceptible and -resistant HLA class II genes have helped unravel the complex interactions between genetic factors and gut microbiome. This review describes the interactions between HLA genes and gut dysbiosis in sex-biased preclinical autoreactivity and discusses the potential use of endogenous commensals as indicators of treatment efficacy as well as therapeutic tool to suppress pro-inflammatory response in rheumatoid arthritis.
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Affiliation(s)
- Abhinav Lamba
- University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Veena Taneja
- Department of Immunology and Division of Rheumatology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
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2
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Sun H, Guo Y, Wang H, Yin A, Hu J, Yuan T, Zhou S, Xu W, Wei P, Yin S, Liu P, Guo X, Tang Y, Yan Y, Luo Z, Wang M, Liang Q, Wu P, Zhang A, Zhou Z, Chen Y, Li Y, Li J, Shan J, Zhou W. Gut commensal Parabacteroides distasonis alleviates inflammatory arthritis. Gut 2023; 72:1664-1677. [PMID: 36604114 DOI: 10.1136/gutjnl-2022-327756] [Citation(s) in RCA: 36] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 12/21/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Gut microbiota dysbiosis is closely linked to the pathogenesis of rheumatoid arthritis (RA). We aimed to identify potential probiotic gut microbes that can ameliorate the development of RA. DESIGN Microbiota profiling in patients with RA and healthy individuals was investigated via 16S rDNA bacterial gene sequencing and shotgun metagenomics. Collagen-induced arthritic mice and TNF-α transgenic mice were used to evaluate the roles of the gut commensal Parabacteroides distasonis in RA. The effects of P. distasonis-derived microbial metabolites on the differentiation of CD4+ T cells and macrophage polarisation were also investigated. RESULTS The relative abundance of P. distasonis in new-onset patients with RA and patients with RA with history of the disease was downregulated and this decrease was negatively correlated with Disease Activity Score-28 (DAS28). Oral treatment of arthritic mice with live P. distasonis (LPD) considerably ameliorated RA pathogenesis. LPD-derived lithocholic acid (LCA), deoxycholic acid (DCA), isolithocholic acid (isoLCA) and 3-oxolithocholic acid (3-oxoLCA) had similar and synergistic effects on the treatment of RA. In addition to directly inhibiting the differentiation of Th17 cells, 3-oxoLCA and isoLCA were identified as TGR5 agonists that promoted the M2 polarisation of macrophages. A specific synthetic inhibitor of bile salt hydrolase attenuated the antiarthritic effects of LPD by reducing the production of these four bile acids. The natural product ginsenoside Rg2 exhibited its anti-RA effects by promoting the growth of P. distasonis. CONCLUSIONS P. distasonis and ginsenoside Rg2 might represent probiotic and prebiotic agents in the treatment of RA.
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Affiliation(s)
- Haijian Sun
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
- Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Yunke Guo
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Haidan Wang
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Ailing Yin
- Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, China
| | - Jing Hu
- Department of Rheumatology, The Affiliated Jiangyin Hospital of Southeast University, Jiangyin, China
| | - Tianjie Yuan
- Institute of Pediatrics, Jiangsu Key Laboratory of Pediatric Respiratory Disease, Medical Metabolomics Center, Nanjing University of Chinese Medicine, Nanjing, China
| | - Shuxin Zhou
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Weichen Xu
- Institute of Pediatrics, Jiangsu Key Laboratory of Pediatric Respiratory Disease, Medical Metabolomics Center, Nanjing University of Chinese Medicine, Nanjing, China
| | - Peng Wei
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Shusheng Yin
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Panru Liu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Xi Guo
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yizhao Tang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yujiao Yan
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zichen Luo
- Institute of Pediatrics, Jiangsu Key Laboratory of Pediatric Respiratory Disease, Medical Metabolomics Center, Nanjing University of Chinese Medicine, Nanjing, China
| | - Majie Wang
- Key Laboratory of Addiction Research of Zhejiang Province, Ningbo Kangning Hospital, Ningbo, China
| | | | - Peng Wu
- LC-Bio Technology Co., Ltd, Hangzhou, China
| | - Aifeng Zhang
- Department of Pathology, Medical School of Southeast University, Nanjing, China
| | - Zhuxiu Zhou
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yueyue Chen
- Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, China
| | - Yongming Li
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jing Li
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Jinjun Shan
- Institute of Pediatrics, Jiangsu Key Laboratory of Pediatric Respiratory Disease, Medical Metabolomics Center, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wei Zhou
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
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Yiwen C, Yueyue W, Lianmei Q, Cuiming Z, Xiaoxing Y. Infection strategies of mycoplasmas: Unraveling the panoply of virulence factors. Virulence 2021; 12:788-817. [PMID: 33704021 PMCID: PMC7954426 DOI: 10.1080/21505594.2021.1889813] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Mycoplasmas, the smallest bacteria lacking a cell wall, can cause various diseases in both humans and animals. Mycoplasmas harbor a variety of virulence factors that enable them to overcome numerous barriers of entry into the host; using accessory proteins, mycoplasma adhesins can bind to the receptors or extracellular matrix of the host cell. Although the host immune system can eradicate the invading mycoplasma in most cases, a few sagacious mycoplasmas employ a series of invasion and immune escape strategies to ensure their continued survival within their hosts. For instance, capsular polysaccharides are crucial for anti-phagocytosis and immunomodulation. Invasive enzymes degrade reactive oxygen species, neutrophil extracellular traps, and immunoglobulins. Biofilm formation is important for establishing a persistent infection. During proliferation, successfully surviving mycoplasmas generate numerous metabolites, including hydrogen peroxide, ammonia and hydrogen sulfide; or secrete various exotoxins, such as community-acquired respiratory distress syndrome toxin, and hemolysins; and express various pathogenic enzymes, all of which have potent toxic effects on host cells. Furthermore, some inherent components of mycoplasmas, such as lipids, membrane lipoproteins, and even mycoplasma-generated superantigens, can exert a significant pathogenic impact on the host cells or the immune system. In this review, we describe the proposed virulence factors in the toolkit of notorious mycoplasmas to better understand the pathogenic features of these bacteria, along with their pathogenic mechanisms.
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Affiliation(s)
- Chen Yiwen
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, China
| | - Wu Yueyue
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, China
| | - Qin Lianmei
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, China
| | - Zhu Cuiming
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, China
| | - You Xiaoxing
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, China
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Sun Y, Chen Q, Lin P, Xu R, He D, Ji W, Bian Y, Shen Y, Li Q, Liu C, Dong K, Tang YW, Pei Z, Yang L, Lu H, Guo X, Xiao L. Characteristics of Gut Microbiota in Patients With Rheumatoid Arthritis in Shanghai, China. Front Cell Infect Microbiol 2019; 9:369. [PMID: 31709198 PMCID: PMC6819506 DOI: 10.3389/fcimb.2019.00369] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 10/09/2019] [Indexed: 12/29/2022] Open
Abstract
Little is known regarding differences in the gut microbiomes of rheumatoid arthritis (RA) patients and healthy cohorts in China. This study aimed to identify differences in the fecal microbiomes of 66 Chinese patients with RA and 60 healthy Chinese controls. The V3-V4 variable regions of bacterial 16S rRNA genes were sequenced with the Illumina system to define the bacterial composition. The alpha-diversity index of the microbiome of the RA patients was significantly lower than that of the control group. The bacterial genera Bacteroides (p = 0.02202) and Escherichia-Shigella (p = 0.03137) were more abundant in RA patients. In contrast, Lactobacillus (p = 0.000014), Alloprevotella (p = 0.0000008615), Enterobacter (p = 0.000005759), and Odoribacter (p = 0.0000166) were less abundant in the RA group than in the control group. Spearman correlation analysis of blood physiological measures of RA showed that bacterial genera such as Dorea and Ruminococcus were positively correlated with RF-IgA and anti-CCP antibodies. Furthermore, Alloprevotella and Parabacteroides were positively correlated with the erythrocyte sedimentation rate, and Prevotella-2 and Alloprevotella were positively correlated with C-reactive protein, both biomarkers of inflammation. These findings suggest that the gut microbiota may contribute to RA development via interactions with the host immune system.
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Affiliation(s)
- Yang Sun
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
| | - Qian Chen
- Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine, The College of Basic Medical Sciences, Shanghai, China
| | - Ping Lin
- Clinical Laboratory, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Rong Xu
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
| | - Dongyi He
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
| | - Weiqing Ji
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
| | - Yanqin Bian
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
| | - Yu Shen
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
| | - Qingtian Li
- Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine, The College of Basic Medical Sciences, Shanghai, China
| | - Chang Liu
- Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine, The College of Basic Medical Sciences, Shanghai, China
| | - Ke Dong
- Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine, The College of Basic Medical Sciences, Shanghai, China
| | - Yi-Wei Tang
- Clinical Microbiology Service, Department of Laboratory Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY, United States
| | - Zhiheng Pei
- Departments of Pathology and Medicine, New York University School of Medicine, New York, NY, United States.,The Department of Veterans Affairs New York Harbor Healthcare System, New York, NY, United States
| | - Liying Yang
- Departments of Pathology and Medicine, New York University School of Medicine, New York, NY, United States.,The Department of Veterans Affairs New York Harbor Healthcare System, New York, NY, United States
| | - Hongzhou Lu
- Department of Infectious Diseases, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Xiaokui Guo
- Department of Microbiology and Immunology, Shanghai Jiao Tong University School of Medicine, The College of Basic Medical Sciences, Shanghai, China
| | - Lianbo Xiao
- Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Shanghai, China.,Guanghua Integrative Medicine Hospital, Shanghai, China
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Bando K, Kuroishi T, Sugawara S, Endo Y. Interleukin-1 and histamine are essential for inducing nickel allergy in mice. Clin Exp Allergy 2019; 49:1362-1373. [PMID: 31325186 DOI: 10.1111/cea.13467] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 07/09/2019] [Accepted: 07/12/2019] [Indexed: 01/12/2023]
Abstract
BACKGROUND We previously reported that (a) lipopolysaccharide (LPS) is a potent adjuvant for inducing Nickel (Ni) allergy in mice at both the sensitization and elicitation steps, (b) LPS induces Interleukin-1 (IL-1) and histidine decarboxylase (HDC, the histamine-forming enzyme), and IL-1 induces HDC, (c) Ni allergy is induced in mast cell-deficient, but not IL-1-deficient (IL-1-KO) or HDC-KO mice. OBJECTIVE To examine the roles of IL-1 and HDC (or histamine) and their interrelationship during the establishment of Ni allergy. METHODS Ni (NiCl2 ) 1 mmol/L containing IL-1β and/or histamine was injected intraperitoneally (sensitization step). Ten days later, test substance(s) were intradermally injected into ear pinnas (elicitation step), and ear swelling was measured. RESULTS In wild-type mice, Ni + LPS or Ni + IL-1β injection at sensitization step followed by Ni alone at elicitation step induced Ni allergy. In IL-1-KO, injection of Ni + IL-1β (but not Ni + histamine) was required at both sensitization and elicitation steps to induce Ni allergy. In HDC-KO, Ni + IL-1β + histamine at sensitization step followed by Ni + histamine at elicitation step induced Ni allergy. In histamine H1 receptor-deficient mice, IL-1β induced HDC, but was ineffective as an adjuvant for inducing Ni allergy. In wild-type mice, injection into ear pinnas of Ni 10 mmol/L alone or Ni 1 mmol/L + LPS induced IL-1β, HDC and a prolonged swelling of ear pinnas. In non-sensitized mice, injection of IL-1β by itself into ear pinnas in IL-1-KO mice induced prolonged ear swelling. Ni augmented IL-1 production (both IL-1α and IL-1β) and HDC induction in wild-type mice sensitized to Ni. CONCLUSIONS In mice: (a) for inducing Ni allergy, IL-1 is essential at both the sensitization and elicitation steps, and HDC induction is involved in the effect of IL-1, (b) stimulation of H1 receptor is also essential for inducing Ni allergy at both sensitization and elicitation steps, and (c) the 'sensitization to Ni' state may be a state where tissues are primed for augmented production of IL-1α and/or IL-1β in response to Ni. (within 300 words, now 300).
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Affiliation(s)
- Kanan Bando
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Toshinobu Kuroishi
- Division of Oral Immunology, Department of Oral Biology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Shunji Sugawara
- Division of Oral Immunology, Department of Oral Biology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yasuo Endo
- Division of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University, Sendai, Japan
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Rottem S. "Unique choline-containing phosphoglycolipids in Mycoplasma fermentans". Chem Phys Lipids 2015; 194:94-100. [PMID: 26496149 DOI: 10.1016/j.chemphyslip.2015.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/08/2015] [Accepted: 07/26/2015] [Indexed: 10/22/2022]
Affiliation(s)
- Shlomo Rottem
- Department of Microbiology and Molecular Genetics, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel.
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7
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Unique choline-containing phosphoglycolipids in Mycoplasma fermentans. Chem Phys Lipids 2015; 191:61-7. [PMID: 26232667 DOI: 10.1016/j.chemphyslip.2015.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/08/2015] [Accepted: 07/26/2015] [Indexed: 11/21/2022]
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Abstract
The microbiota of the human metaorganism is not a mere bystander. These microbes have coevolved with us and are pivotal to normal development and homoeostasis. Dysbiosis of the GI microbiota is associated with many disease susceptibilities, including obesity, malignancy, liver disease and GI pathology such as IBD. It is clear that there is direct and indirect crosstalk between this microbial community and host immune response. However, the precise mechanism of this microbial influence in disease pathogenesis remains elusive and is now a major research focus. There is emerging literature on the role of the microbiota in the pathogenesis of autoimmune disease, with clear and increasing evidence that changes in the microbiota are associated with some of these diseases. Examples include type 1 diabetes, coeliac disease and rheumatoid arthritis, and these contribute significantly to global morbidity and mortality. Understanding the role of the microbiota in autoimmune diseases may offer novel insight into factors that initiate and drive disease progression, stratify patient risk for complications and ultimately deliver new therapeutic strategies. This review summarises the current status on the role of the microbiota in autoimmune diseases.
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Affiliation(s)
- Mairi H McLean
- Laboratory of Molecular Immunoregulation, Cancer & Inflammation Program, National Cancer Institute, Frederick, Maryland, USA
| | - Dario Dieguez
- Society for Women’s Health Research, Scientific Affairs, Washington, DC, USA
| | - Lindsey M Miller
- Society for Women’s Health Research, Scientific Affairs, Washington, DC, USA
| | - Howard A Young
- Laboratory of Molecular Immunoregulation, Cancer & Inflammation Program, National Cancer Institute, Frederick, Maryland, USA
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9
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Arthritis susceptibility and the gut microbiome. FEBS Lett 2014; 588:4244-9. [PMID: 24873878 DOI: 10.1016/j.febslet.2014.05.034] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 05/16/2014] [Accepted: 05/19/2014] [Indexed: 01/11/2023]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease with unknown etiology though both genetic and environmental factors have been suggested to be involved in its pathogenesis. While infections and other environmental factors (e.g. smoking) have been studied extensively and show some association, a direct link between all the factors has been difficult to prove. With the recent advances in technology, it has become possible to sequence the commensals that are residing in our gut. The gut microbiome may provide the missing link to this puzzle and help solve the mystery of many leaky gut syndromes. The gut commensals are involved in maintaining host immune homeostasis and function suggesting that they might be critical in altering the immune system, which leads to autoimmune diseases like RA. Mouse models support the role of the gut microbiota in predisposition to RA. If that is true, the power of gut-derived commensal can be harnessed to our benefit by generating a biomarker profile along with genetic factors to define individuals at risk and by altering the gut microbial composition using various means.
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Fu M, Chen LH, Xia G, Zhang Y. Effects of Ureaplasma urealyticum lipid-associated membrane proteins on rheumatoid arthritis synovial fibroblasts. J Int Med Res 2013; 41:1655-70. [PMID: 24097830 DOI: 10.1177/0300060513498542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objectives As an infectious agent might play a role in rheumatoid arthritis (RA) development, this study investigated effects of Ureaplasma urealyticum lipid-associated membrane proteins (UuLAMPs) on RA synovial fibroblast (RASF) proliferation, and tumour necrosis factor (TNF)-α and interleukin (IL)-1β production by THP-1 macrophages. Possible immunogenic proteins in UuLAMPs were identified. Methods RASFs were cultured from synovial tissue from donors with RA. Serum samples from donors with/without RA and with/without U. urealyticum infection were used for immunogenicity analyses. THP-1 macrophages served as a model for synovial macrophages. TNF-α and IL-1β mRNA levels were assessed using reverse transcription–polymerase chain reaction; protein levels were estimated using enzyme-linked immunosorbent assay. UuLAMPs underwent separation and Western blot analyses. Results UuLAMPs (0.025–0.4 µg/ml) stimulated RASF proliferation in a dose- and time-dependent manner, and increased TNF-α and IL-1β levels in THP-1 macrophages. Several immunogenic UuLAMPs were identified, but antibodies to a 25 kDa protein were only found in RA patients with U. urealyticum infection. Conclusions UuLAMPs might induce RASF proliferation and proinflammatory cytokine secretion in synovium from RA patients. A 25 kDa U. urealyticum protein might act as a cross-reactive antigen.
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Affiliation(s)
- Min Fu
- Department of Rheumatology, Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Li Hui Chen
- Department of Rheumatology, Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Guangtao Xia
- Department of Rheumatology, Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Yuanchao Zhang
- Department of Rheumatology, Provincial Hospital Affiliated to Shandong University, Jinan, China
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Arumugam N, Abdul Rahim AS, Abd Hamid S, Osman H. Straightforward synthesis of novel 1-(2'-α-O-D-glucopyranosyl ethyl) 2-arylbenzimidazoles. Molecules 2012; 17:9887-99. [PMID: 22902883 PMCID: PMC6268058 DOI: 10.3390/molecules17089887] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Revised: 07/27/2012] [Accepted: 08/13/2012] [Indexed: 01/15/2023] Open
Abstract
A series of novel 1-(2'-α-O-D-glucopyranosyl ethyl) 2-arylbenzimidazoles has been prepared via one-pot glycosylation of ethyl-1-(2'-hydroxyethyl)-2-arylbenzimidazole-5-carboxylate derivatives. Synthesis of the 2-arylbenzimidazole aglycones from 4-fluoro-3-nitrobenzoic acid was accomplished in four high-yielding steps. The reduction and cyclocondensation steps for the aglycone synthesis proceeded efficiently under microwave irradiation to afford the appropriate benzimidazoles in excellent yields within 2-3 min. Glycosylation of the hydroxyethyl aglycones with the perbenzylated 1-hydroxy- glucopyranose, pretreated with the Appel-Lee reagent, followed by catalytic hydrogenolysis delivered the desired 1-(2'-α-O-D-glucopyranosyl ethyl) 2-aryl-benzimidazoles in a simple and straightforward manner.
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Affiliation(s)
- Natarajan Arumugam
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
| | - Aisyah Saad Abdul Rahim
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
| | - Shafida Abd Hamid
- Kulliyyah of Science, International Islamic University Malaysia (IIUM), Jalan Istana, Bandar Indera Mahkota, 25200 Kuantan, Pahang, Malaysia
| | - Hasnah Osman
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
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Nishida Y, Shingu Y, Mengfei Y, Fukuda K, Dohi H, Matsuda S, Matsuda K. An easy α-glycosylation methodology for the synthesis and stereochemistry of mycoplasma α-glycolipid antigens. Beilstein J Org Chem 2012; 8:629-39. [PMID: 22563361 PMCID: PMC3343289 DOI: 10.3762/bjoc.8.70] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 03/28/2012] [Indexed: 11/23/2022] Open
Abstract
Mycoplasma fermentans possesses unique α-glycolipid antigens (GGPL-I and GGPL-III) at the cytoplasm membrane, which carry a phosphocholine group at the sugar primary (6-OH) position. This paper describes a practical synthetic pathway to a GGPL-I homologue (C(16:0)) and its diastereomer, in which our one-pot α-glycosylation method was effectively applied. The synthetic GGPL-I isomers were characterized with (1)H NMR spectroscopy to determine the equilibrium among the three conformers (gg, gt, tg) at the acyclic glycerol moiety. The natural GGPL-I isomer was found to prefer gt (54%) and gg (39%) conformers around the lipid tail, while adopting all of the three conformers with equal probability around the sugar position. This property was very close to what we have observed with respect to the conformation of phosphatidylcholine (DPPC), suggesting that the Mycoplasma glycolipids GGPLs may constitute the cytoplasm fluid membrane together with ubiquitous phospholipids, without inducing stereochemical stress.
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Affiliation(s)
- Yoshihiro Nishida
- Chiba University, Graduate School of Advanced Integration Science, Matsudo 271-8510, Chiba, Japan
| | - Yuko Shingu
- M. Biotech. Co. Ltd., Setagaya-ku, Fukazawa 2-1-3-1103,Tokyo 158-0081, Japan
| | - Yuan Mengfei
- Chiba University, Graduate School of Advanced Integration Science, Matsudo 271-8510, Chiba, Japan
| | - Kazuo Fukuda
- Chiba University, Graduate School of Advanced Integration Science, Matsudo 271-8510, Chiba, Japan
| | - Hirofumi Dohi
- Chiba University, Graduate School of Advanced Integration Science, Matsudo 271-8510, Chiba, Japan
| | - Sachie Matsuda
- M. Biotech. Co. Ltd., Setagaya-ku, Fukazawa 2-1-3-1103,Tokyo 158-0081, Japan
| | - Kazuhiro Matsuda
- M. Biotech. Co. Ltd., Setagaya-ku, Fukazawa 2-1-3-1103,Tokyo 158-0081, Japan
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Abstract
PURPOSE OF REVIEW This review focuses on recent research that explores the role of infectious organisms in the development of autoimmunity and rheumatoid arthritis (RA). RECENT FINDINGS Human and animal studies provide further evidence supporting a role for the periodontal pathogen, Porphyromonas gingivalis, in the development of RA. The microbiome plays a key role in the developing immune system. Alterations in the bowel microbiome lead to altered innate and adaptive immune responses potentially relevant to the development or persistence of RA. SUMMARY Microbes and the host response to microbes are important factors in the maintenance of health. Abnormalities or imbalances in these responses can lead to the development of autoimmune inflammatory conditions such as RA.
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Pásztói M, Misják P, György B, Aradi B, Szabó TG, Szántó B, Holub MC, Nagy G, Falus A, Buzás EI. Infection and autoimmunity: Lessons of animal models. Eur J Microbiol Immunol (Bp) 2011; 1:198-207. [PMID: 24516725 DOI: 10.1556/eujmi.1.2011.3.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 07/11/2011] [Indexed: 12/25/2022] Open
Abstract
While the key initiating processes that trigger human autoimmune diseases remain enigmatic, increasing evidences support the concept that microbial stimuli are among major environmental factors eliciting autoimmune diseases in genetically susceptible individuals. Here, we present an overview of evidences obtained through various experimental models of autoimmunity for the role of microbial stimuli in disease development. Disease onset and severity have been compared in numerous models under conventional, specific-pathogen-free and germ-free conditions. The results of these experiments suggest that there is no uniform scheme that could describe the role played by infectious agents in the experimental models of autoimmunity. While some models are dependent, others prove to be completely independent of microbial stimuli. In line with the threshold hypothesis of autoimmune diseases, highly relevant genetic factors or microbial stimuli induce autoimmunity on their own, without requiring further factors. Importantly, recent evidences show that colonization of germ-free animals with certain members of the commensal flora [such as segmented filamentous bacteria (SFB)] may lead to autoimmunity. These data drive attention to the importance of the complex composition of gut flora in maintaining immune homeostasis. The intriguing observation obtained in autoimmune animal models that parasites often confer protection against autoimmune disease development may suggest new therapeutic perspectives of infectious agents in autoimmunity.
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