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Armitage CW, Bryan ER, Trim L, Palframan E, Wager L, Beagley KW, Carey AJ. Haematopoietic innate interleukin 17A production drives immunopathology in female mouse genital Chlamydia muridarum infection. Scand J Immunol 2024; 99:e13359. [PMID: 38605527 DOI: 10.1111/sji.13359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 01/02/2024] [Accepted: 01/09/2024] [Indexed: 04/13/2024]
Abstract
Chlamydia trachomatis infection is the leading cause of bacterial urogenital infection and has been demonstrated to drive inflammation and scarring of the reproductive tract. Recent studies have identified key triggers of proinflammatory adaptive immune responses driven by innate leukocytes and epithelia driving immunopathology. Utilizing chimeric mouse models, we investigated the definitive source and role of IL17 and IL17 signalling receptors during early Chlamydia muridarum infection of the female urogenital tract. Bone marrow transplants from wild-type (WT) and IL17A-/- mice to recipients demonstrated equivocal infection kinetics in the reproductive tract, but interestingly, adoptive transfer of IL17A-/- immune cells to WT recipients resulted in no infertility, suggesting a haematopoietic (as opposed to tissue) source of IL17 driving immunopathology. To further delineate the role of IL17 in immunopathology, we infected WT and IL17 receptor A (IL17RA)-/- female mice and observed a significant reduction in immunopathology in IL17RA-/- mice. WT bone marrow transplants to IL17RA-/- recipient mice prevented hydrosalpinx, suggesting signalling through IL17RA drives immunopathology. Furthermore, early chemical inhibition of IL17 signalling significantly reduced hydrosalpinx, suggesting IL17 acts as an innate driver of disease. Early during the infection, IL17 was produced by γδ T cells in the cervico-vagina, but more importantly, by neutrophils at the site of infertility in the oviducts. Taken together, these data suggest innate production of IL17 by haematopoietic leukocytes drives immunopathology in the epithelia during early C. muridarum infection of the female reproductive tract.
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Affiliation(s)
- Charles W Armitage
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
- Peter Goher Department of Immunobiology, Kings College London, London, UK
| | - Emily R Bryan
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Logan Trim
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Ella Palframan
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Lucas Wager
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Kenneth W Beagley
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Alison J Carey
- School of Biomedical Science and Centre for Immunology and Infection Control, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
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Feng Y, Chen Z, Tu SQ, Wei JM, Hou YL, Kuang ZL, Kang XN, Ai H. Role of Interleukin-17A in the Pathomechanisms of Periodontitis and Related Systemic Chronic Inflammatory Diseases. Front Immunol 2022; 13:862415. [PMID: 35371044 PMCID: PMC8968732 DOI: 10.3389/fimmu.2022.862415] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 02/28/2022] [Indexed: 01/02/2023] Open
Abstract
Periodontitis is a chronic inflammatory and destructive disease caused by periodontal microbial infection and mediated by host immune response. As the main cause of loosening and loss of teeth in adults, it is considered to be one of the most common and serious oral diseases in the world. The co-existence of periodontitis and systemic chronic inflammatory diseases such as rheumatoid arthritis, psoriasis, inflammatory bowel disease, diabetes and so on is very common. It has been found that interleukin-17A (IL-17A) secreted by various innate and adaptive immune cells can activate a series of inflammatory cascade reactions, which mediates the occurrence and development of periodontitis and related systemic chronic inflammatory diseases. In this work, we review the role of IL-17A in the pathomechanisms of periodontitis and related systemic chronic inflammatory diseases, and briefly discuss the therapeutic potential of cytokine targeted agents that modulate the IL-17A signaling. A deep understanding of the possible molecular mechanisms in the relationship between periodontitis and systemic diseases will help dentists and physicians update their clinical diagnosis and treatment ideas.
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Gao T, Lin J, Wei H, Bao B, Zhu H, Zheng X. Platelets mediate trained immunity against bone and joint infections in a mouse model. Bone Joint Res 2022; 11:73-81. [PMID: 35118873 PMCID: PMC8882326 DOI: 10.1302/2046-3758.112.bjr-2021-0279.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
AIMS Trained immunity confers non-specific protection against various types of infectious diseases, including bone and joint infection. Platelets are active participants in the immune response to pathogens and foreign substances, but their role in trained immunity remains elusive. METHODS We first trained the innate immune system of C57BL/6 mice via intravenous injection of two toll-like receptor agonists (zymosan and lipopolysaccharide). Two, four, and eight weeks later, we isolated platelets from immunity-trained and control mice, and then assessed whether immunity training altered platelet releasate. To better understand the role of immunity-trained platelets in bone and joint infection development, we transfused platelets from immunity-trained mice into naïve mice, and then challenged the recipient mice with Staphylococcus aureus or Escherichia coli. RESULTS After immunity training, the levels of pro-inflammatory cytokines (tumour necrosis factor alpha (TNF-α), interleukin (IL)-17A) and chemokines (CCL5, CXCL4, CXCL5, CXCL7, CXCL12) increased significantly in platelet releasate, while the levels of anti-inflammatory cytokines (IL-4, IL-13) decreased. Other platelet-secreted factors (e.g. platelet-derived growth factor (PDGF)-AA, PDGF-AB, PDGF-BB, cathepsin D, serotonin, and histamine) were statistically indistinguishable between the two groups. Transfusion of platelets from trained mice into naïve mice reduced infection risk and bacterial burden after local or systemic challenge with either S. aureus or E. coli. CONCLUSION Immunity training altered platelet releasate by increasing the levels of inflammatory cytokines/chemokines and decreasing the levels of anti-inflammatory cytokines. Transfusion of platelets from immunity-trained mice conferred protection against bone and joint infection, suggesting that alteration of platelet releasate might be an important mechanism underlying trained immunity and may have clinical implications. Cite this article: Bone Joint Res 2022;11(2):73-81.
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Affiliation(s)
- Tao Gao
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Junqing Lin
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Haifeng Wei
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Bingbo Bao
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Hongyi Zhu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xianyou Zheng
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Xiang W, Yu N, Lei A, Li X, Tan S, Huang L, Zhou Z. Insights Into Host Cell Cytokines in Chlamydia Infection. Front Immunol 2021; 12:639834. [PMID: 34093528 PMCID: PMC8176227 DOI: 10.3389/fimmu.2021.639834] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 05/05/2021] [Indexed: 01/08/2023] Open
Abstract
Chlamydial infection causes a number of clinically relevant diseases and induces significant morbidity in humans. Immune and inflammatory responses contribute to both the clearance of Chlamydia infection and pathology in host tissues. Chlamydia infection stimulates host cells to produce a large number of cytokines that trigger and regulate host immune responses against Chlamydia. However, inappropriate responses can occur with excessive production of cytokines, resulting in overreactive inflammatory responses and alterations in host or Chlamydia metabolism. As a result, Chlamydia persists and causes wound healing delays, leading to more severe tissue damage and triggering long-lasting fibrotic sequelae. Here, we summarize the roles of cytokines in Chlamydia infection and pathogenesis, thus advancing our understanding chlamydial infection biology and the pathogenic mechanisms involved.
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Affiliation(s)
- Wenjing Xiang
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Nanyan Yu
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Aihua Lei
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Xiaofang Li
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Shui Tan
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Lijun Huang
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China.,Nanyue Biopharmaceutical Co. Ltd., Hunan Province Innovative Training Base for Postgraduates, University of South China and Nanyue Biopharmaceutical Co. Ltd., Hengyang, China
| | - Zhou Zhou
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
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Zha X, Yang S, Niu W, Tan L, Xu Y, Zeng J, Tang Y, Sun L, Pang G, Qiao S, Zhang H, Liu T, Zhao H, Zheng N, Zhang Y, Bai H. IL-27/IL-27R Mediates Protective Immunity against Chlamydial Infection by Suppressing Excessive Th17 Responses and Reducing Neutrophil Inflammation. THE JOURNAL OF IMMUNOLOGY 2021; 206:2160-2169. [PMID: 33863788 DOI: 10.4049/jimmunol.2000957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 02/22/2021] [Indexed: 01/30/2023]
Abstract
IL-27, a heterodimeric cytokine of the IL-12 family, has diverse influences on the development of multiple inflammatory diseases. In this study, we identified the protective role of IL-27/IL-27R in host defense against Chlamydia muridarum respiratory infection and further investigated the immunological mechanism. Our results showed that IL-27 was involved in C. muridarum infection and that IL-27R knockout mice (WSX-1-/- mice) suffered more severe disease, with greater body weight loss, higher chlamydial loads, and more severe inflammatory reactions in the lungs than C57BL/6 wild-type mice. There were excessive IL-17-producing CD4+ T cells and many more neutrophils, neutrophil-related proteins, cytokines, and chemokines in the lungs of WSX-1-/- mice than in wild-type mice following C. muridarum infection. In addition, IL-17/IL-17A-blocking Ab treatment improved disease after C. muridarum infection in WSX-1-/- mice. Overall, we conclude that IL-27/IL-27R mediates protective immunity during chlamydial respiratory infection in mice by suppressing excessive Th17 responses and reducing neutrophil inflammation.
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Affiliation(s)
- Xiaoyu Zha
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Shuaini Yang
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Wenhao Niu
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Lu Tan
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Yueyue Xu
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Jiajia Zeng
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Yingying Tang
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Lida Sun
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Gaoju Pang
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Sai Qiao
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Hong Zhang
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Tengli Liu
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Huili Zhao
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Ningbo Zheng
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Yongci Zhang
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
| | - Hong Bai
- Department of Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, Tianjin, People's Republic of China
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6
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Cai W, Chen X, Men X, Ruan H, Hu M, Liu S, Lu T, Liao J, Zhang B, Lu D, Huang Y, Fan P, Rao J, Lei C, Wang J, Ma X, Zhu Q, Li L, Zhu X, Hou Y, Li S, Dong Q, Tian Q, Ai L, Luo W, Zuo M, Shen L, Xie C, Song H, Xu G, Zheng K, Zhang Z, Lu Y, Qiu W, Chen T, Xiang AP, Lu Z. Gut microbiota from patients with arteriosclerotic CSVD induces higher IL-17A production in neutrophils via activating RORγt. SCIENCE ADVANCES 2021; 7:eabe4827. [PMID: 33523954 DOI: 10.1126/sciadv.abe4827] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
The intestinal microbiota shape the host immune system and influence the outcomes of various neurological disorders. Arteriosclerotic cerebral small vessel disease (aCSVD) is highly prevalent among the elderly with its pathological mechanisms yet is incompletely understood. The current study investigated the ecology of gut microbiota in patients with aCSVD, particularly its impact on the host immune system. We reported that the altered composition of gut microbiota was associated with undesirable disease outcomes and exacerbated inflammaging status. When exposed to the fecal bacterial extracts from a patient with aCSVD, human and mouse neutrophils were activated, and capacity of interleukin-17A (IL-17A) production was increased. Mechanistically, RORγt signaling in neutrophils was activated by aCSVD-associated gut bacterial extracts to up-regulate IL-17A production. Our findings revealed a previously unrecognized implication of the gut-immune-brain axis in aCSVD pathophysiology, with therapeutic implications.
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Affiliation(s)
- Wei Cai
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
- Center of Clinical Immunology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou 510080, China
| | - Xiaodong Chen
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Xuejiao Men
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Hengfang Ruan
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Mengyan Hu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Sanxin Liu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Tingting Lu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Jinchi Liao
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Bingjun Zhang
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Danli Lu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Yinong Huang
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Ping Fan
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Junping Rao
- Department of Neurology, Yuedong Hospital, the Third Affiliated Hospital of Sun Yat-sen University, Meizhou, Guangdong 514011, China
| | - Chunyan Lei
- South China Institute of Biomedicine, Guangzhou, Guangdong 510535, China
| | - Jihui Wang
- Department of Psychiatry, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China
| | - Xiaomeng Ma
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Qiang Zhu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Lili Li
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Xiuyun Zhu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Yujiao Hou
- Department of Neurology, Yuedong Hospital, the Third Affiliated Hospital of Sun Yat-sen University, Meizhou, Guangdong 514011, China
| | - Shu Li
- Department of Neurology, Yuedong Hospital, the Third Affiliated Hospital of Sun Yat-sen University, Meizhou, Guangdong 514011, China
| | - Qing Dong
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Qing Tian
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Lulu Ai
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Wenjing Luo
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Mengyun Zuo
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Liping Shen
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Congyan Xie
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Hongzhong Song
- Department of Neurology, Yuedong Hospital, the Third Affiliated Hospital of Sun Yat-sen University, Meizhou, Guangdong 514011, China
| | - Ganlin Xu
- South China Institute of Biomedicine, Guangzhou, Guangdong 510535, China
| | - Kangdi Zheng
- South China Institute of Biomedicine, Guangzhou, Guangdong 510535, China
| | - Zhao Zhang
- South China Institute of Biomedicine, Guangzhou, Guangdong 510535, China
| | - Yongjun Lu
- Run Ze Laboratory for Gastrointestinal Microbiome Study, School of Life Sciences and Biomedical Center of Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wei Qiu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Tao Chen
- South China Institute of Biomedicine, Guangzhou, Guangdong 510535, China
- Center of Human Microecology Engineering and Technology of Guangdong Province, Guangzhou, Guangdong 510535, China
| | - Andy Peng Xiang
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou 510080, China
| | - Zhengqi Lu
- Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
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Dysbiosis of the gut microbiota maybe exacerbate orf pathology by promoting inflammatory immune responses. Vet Microbiol 2020; 251:108884. [PMID: 33086176 DOI: 10.1016/j.vetmic.2020.108884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 10/06/2020] [Indexed: 12/22/2022]
Abstract
Orf is a contagious disease caused by the epitheliotropic orf virus (ORFV) that mainly affects goats and sheep. Orf occurs worldwide and can cause great losses to livestock production. Mounting evidence has shown that gut microbiota plays a pivotal role in shaping the immune responses of the host and thus affecting the infection process of a wide range of pathogens. However, it is unclear whether gut microbiota plays a role during orf development. In this study, we exploited asymptomatic ORFV-carrier goats to explore the potential effects of gut microbiota on orf pathogenesis. The results showed that antibiotics-induced gut microbiota disruption significantly aggravated orf, as indicated by the greater disease severity and higher percentage of animals manifesting clinical orf symptoms. Further analysis suggested IL-17-induced excessive neutrophil accumulation in the diseased lips was potentially responsible for the tissue pathology. In addition, skin γδT cells may be an important source of IL-17. In conclusion, our study showed that the gut microbiota of ORFV-carrier goats plays a central role in controlling inflammatory pathology during ORFV infection, partly through suppressing IL-17-mediated local proinflammatory immune responses. This finding can provide help for elucidating the pathogenesis of orf and also suggests an efficient strategy to minimize the inflammatory pathology by maintaining a healthy gut microbiota during orf development.
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Sodhi CP, Nguyen J, Yamaguchi Y, Werts AD, Lu P, Ladd MR, Fulton WB, Kovler ML, Wang S, Prindle T, Zhang Y, Lazartigues ED, Holtzman MJ, Alcorn JF, Hackam DJ, Jia H. A Dynamic Variation of Pulmonary ACE2 Is Required to Modulate Neutrophilic Inflammation in Response to Pseudomonas aeruginosa Lung Infection in Mice. THE JOURNAL OF IMMUNOLOGY 2019; 203:3000-3012. [PMID: 31645418 DOI: 10.4049/jimmunol.1900579] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/26/2019] [Indexed: 12/15/2022]
Abstract
Angiotensin-converting enzyme 2 (ACE2) is a potent negative regulator capable of restraining overactivation of the renin-angiotensin system, which contributes to exuberant inflammation after bacterial infection. However, the mechanism through which ACE2 modulates this inflammatory response is not well understood. Accumulating evidence indicates that infectious insults perturb ACE2 activity, allowing for uncontrolled inflammation. In the current study, we demonstrate that pulmonary ACE2 levels are dynamically varied during bacterial lung infection, and the fluctuation is critical in determining the severity of bacterial pneumonia. Specifically, we found that a pre-existing and persistent deficiency of active ACE2 led to excessive neutrophil accumulation in mouse lungs subjected to bacterial infection, resulting in a hyperinflammatory response and lung damage. In contrast, pre-existing and persistent increased ACE2 activity reduces neutrophil infiltration and compromises host defense, leading to overwhelming bacterial infection. Further, we found that the interruption of pulmonary ACE2 restitution in the model of bacterial lung infection delays the recovery process from neutrophilic lung inflammation. We observed the beneficial effects of recombinant ACE2 when administered to bacterially infected mouse lungs following an initial inflammatory response. In seeking to elucidate the mechanisms involved, we discovered that ACE2 inhibits neutrophil infiltration and lung inflammation by limiting IL-17 signaling by reducing the activity of the STAT3 pathway. The results suggest that the alteration of active ACE2 is not only a consequence of bacterial lung infection but also a critical component of host defense through modulation of the innate immune response to bacterial lung infection by regulating neutrophil influx.
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Affiliation(s)
- Chhinder P Sodhi
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Jenny Nguyen
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104
| | - Yukihiro Yamaguchi
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Adam D Werts
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Peng Lu
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Mitchell R Ladd
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - William B Fulton
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Mark L Kovler
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Sanxia Wang
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Thomas Prindle
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Yong Zhang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Eric D Lazartigues
- Department of Pharmacology and Experimental Therapeutics, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA 70112.,Southeast Louisiana Veterans Health Care System, New Orleans, LA 70119; and
| | - Michael J Holtzman
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - John F Alcorn
- Division of Pulmonary Medicine, Department of Pediatrics, University of Pittsburgh Medical Center Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA 15224
| | - David J Hackam
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Hongpeng Jia
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205;
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