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Pan X, Guo X, Shi J. Design of a novel multiepitope vaccine with CTLA-4 extracellular domain against Mycoplasma pneumoniae: A vaccine-immunoinformatics approach. Vaccine 2024; 42:3883-3898. [PMID: 38777697 DOI: 10.1016/j.vaccine.2024.04.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 04/16/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024]
Abstract
BACKGROUND Community-acquired pneumonia often stems from the macrolide-resistant strain of Mycoplasma pneumoniae, yet no effective vaccine exists against it. METHODS This study proposes a vaccine-immunoinformatics strategy for Mycoplasma pneumoniae and other pathogenic microbes. Specifically, dominant B and T cell epitopes of the Mycoplasma pneumoniae P30 adhesion protein were identified through immunoinformatics method. The vaccine sequence was then constructed by coupling with CTLA-4 extracellular region, a novel molecular adjuvant for antigen-presenting cells. Subsequently, the vaccine's physicochemical properties, antigenicity, and allergenicity were verified. Molecular dynamics modeling was employed to confirm interaction with TLR-2, TLR-4, B7-1, and B7-2. Finally, the vaccine underwent in silico cloning for expression. RESULTS The vaccine exhibited both antigenicity and non-allergenicity. Molecular dynamics simulation, post-docking with TLR-2, TLR-4, B7-1, and B7-2, demonstrated stable interaction between the vaccine and these molecules. In silico cloning confirmed effective expression of the vaccine gene in insect baculovirus vectors. CONCLUSION This vaccine-immunoinformatics approach holds promise for the development of vaccines against Mycoplasma pneumoniae and other pathogenic non-viral and non-bacterial microbes.
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Affiliation(s)
- Xiaohong Pan
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China
| | - Xiaomei Guo
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China; Kunming Medical University, Kunming, Yunnan, China
| | - Jiandong Shi
- Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan, China; National Kunming High-level Biosafety Primate Research Center, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Yunnan China.
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Georgakopoulou VE, Lempesis IG, Sklapani P, Trakas N, Spandidos DA. Exploring the pathogenetic mechanisms of Mycoplasmapneumoniae (Review). Exp Ther Med 2024; 28:271. [PMID: 38765654 PMCID: PMC11097136 DOI: 10.3892/etm.2024.12559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 04/17/2024] [Indexed: 05/22/2024] Open
Abstract
Mycoplasmas, the smallest self-replicating prokaryotes without a cell wall, are the most prevalent and extensively studied species in humans. They significantly contribute to chronic respiratory tract illnesses and pneumonia, with children and adolescents being particularly vulnerable. Mycoplasma pneumoniae (M. pneumoniae) infections typically tend to be self-limiting and mild but can progress to severe or even life-threatening conditions in certain individuals. Extrapulmonary effects often occur without pneumonia, and both intrapulmonary and extrapulmonary complications operate through separate pathological mechanisms. The indirect immune-mediated damage of the immune system, vascular blockages brought on by vasculitis or thrombosis and direct harm from invasion or locally induced inflammatory cytokines are potential causes of extrapulmonary manifestations due to M. pneumoniae. Proteins associated with adhesion serve as the primary factor crucial for the pathogenicity of M. pneumoniae, relying on a specialized polarized terminal attachment organelle. The type and density of these host receptors significantly impact the adhesion and movement of M. pneumoniae, subsequently influencing the pathogenic mechanism and infection outcomes. Adjacent proteins are crucial for the proper assembly of the attachment organelle, with variations in the genetic domains of P1, P40 and P90 surfaces contributing to the variability of clinical symptoms and offering new avenues for developing vaccines against M. pneumoniae infections. M. pneumoniae causes oxidative stress within respiratory tract epithelial cells by adhering to host cells and releasing hydrogen peroxide and superoxide radicals. This oxidative stress enhances the vulnerability of host cells to harm induced by oxygen molecules. The lack of superoxide dismutase and catalase of bacteria allows it to hinder the catalase activity of the host cell, leading to the reduced breakdown of peroxides. Lung macrophages play a significant role in managing M. pneumoniae infection, identifying it via Toll-like receptor 2 and initiating the myeloid differentiation primary response gene 88-nuclear factor κΒ signaling cascade. However, the precise mechanisms enabling M. pneumoniae to evade intracellular host defenses remain unknown, necessitating further exploration of the pathways involved in intracellular survival. The present comprehensive review delves into the pathogenesis of M. pneumoniae infection within the pulmonary system and into extrapulmonary areas, outlining its impact.
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Affiliation(s)
- Vasiliki Epameinondas Georgakopoulou
- Department of Pathophysiology, Laiko General Hospital, National and Kapodisttrian University of Athens, 11527 Athens, Greece
- Department of Infectious Diseases-COVID-19 Unit, Laiko General Hospital, 11527 Athens, Greece
| | - Ioannis G. Lempesis
- Department of Pathophysiology, Laiko General Hospital, National and Kapodisttrian University of Athens, 11527 Athens, Greece
| | - Pagona Sklapani
- Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece
| | - Nikolaos Trakas
- Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece
| | - Demetrios A. Spandidos
- Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
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Yang J, Song Y, Xia K, Pomin VH, Wang C, Qiao M, Linhardt RJ, Dordick JS, Zhang F. Marine-Derived Sulfated Glycans Inhibit the Interaction of Heparin with Adhesion Proteins of Mycoplasma pneumoniae. Mar Drugs 2024; 22:232. [PMID: 38786623 PMCID: PMC11123223 DOI: 10.3390/md22050232] [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: 04/14/2024] [Revised: 05/06/2024] [Accepted: 05/17/2024] [Indexed: 05/25/2024] Open
Abstract
Mycoplasma pneumoniae, a notable pathogen behind respiratory infections, employs specialized proteins to adhere to the respiratory epithelium, an essential process for initiating infection. The role of glycosaminoglycans, especially heparan sulfate, is critical in facilitating pathogen-host interactions, presenting a strategic target for therapeutic intervention. In this study, we assembled a glycan library comprising heparin, its oligosaccharide derivatives, and a variety of marine-derived sulfated glycans to screen the potential inhibitors for the pathogen-host interactions. By using Surface Plasmon Resonance spectroscopy, we evaluated the library's efficacy in inhibiting the interaction between M. pneumoniae adhesion proteins and heparin. Our findings offer a promising avenue for developing novel therapeutic strategies against M. pneumoniae infections.
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Affiliation(s)
- Jiyuan Yang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; (J.Y.); (M.Q.)
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA; (Y.S.); (K.X.); (C.W.); (R.J.L.)
| | - Yuefan Song
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA; (Y.S.); (K.X.); (C.W.); (R.J.L.)
| | - Ke Xia
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA; (Y.S.); (K.X.); (C.W.); (R.J.L.)
| | - Vitor H. Pomin
- Department of BioMolecular Sciences, Research Institute of Pharmaceutical Sciences, The University of Mississippi, Oxford, MS 38677, USA;
| | - Chunyu Wang
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA; (Y.S.); (K.X.); (C.W.); (R.J.L.)
| | - Mingqiang Qiao
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; (J.Y.); (M.Q.)
| | - Robert J. Linhardt
- Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA; (Y.S.); (K.X.); (C.W.); (R.J.L.)
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Jonathan S. Dordick
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Fuming Zhang
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
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Xue Y, Yu Z, Cheng M, Li X, Jiang L, Han W. Concomitant Central and Peripheral Nervous System Involvement Associated With Mycoplasma pneumoniae Infection in Pediatric Patients: Two Case Reports and Literature Review. Pediatr Infect Dis J 2024:00006454-990000000-00869. [PMID: 38754001 DOI: 10.1097/inf.0000000000004394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
BACKGROUND Mycoplasma pneumoniae (M. pneumoniae) is a common pathogen for community-acquired pneumonia and is also implicated in a broad array of extra-pulmonary manifestations. M. pneumoniae infection is rarely associated with concurrent central nervous system (CNS) and peripheral nervous system (PNS) involvement in children. METHODS We report 2 patients who presented with acute encephalitis and polyradiculitis due to M. pneumoniae infection and review the literature to discuss the pathogenesis and treatment of concomitant CNS and PNS involvement associated with M. pneumoniae infection. RESULTS We report two 6-year-old boys with M. pneumoniae antecedent infection who presented initially with impaired consciousness followed by limb weakness, limb pain and urinary retention, and responded well to immunotherapy. CONCLUSIONS We described 2 patients who presented symptomatic combined CNS and PNS involvement with persistent urinary retention associated with M. pneumoniae infection. We found autoimmunity plays an important role and recommend that antibiotics and immunomodulators should be administered with concurrent CNS and PNS involvement associated with M. pneumoniae.
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Affiliation(s)
- Yuan Xue
- From the Department of Neurology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders
- Ministry of Education Key Laboratory of Child Development and Disorders
- Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Chongqing, China
| | - Zhiwei Yu
- From the Department of Neurology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders
- Ministry of Education Key Laboratory of Child Development and Disorders
- Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Chongqing, China
| | - Min Cheng
- From the Department of Neurology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders
- Ministry of Education Key Laboratory of Child Development and Disorders
- Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Chongqing, China
| | - Xiujuan Li
- From the Department of Neurology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders
- Ministry of Education Key Laboratory of Child Development and Disorders
- Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Chongqing, China
| | - Li Jiang
- From the Department of Neurology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders
- Ministry of Education Key Laboratory of Child Development and Disorders
- Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Chongqing, China
| | - Wei Han
- From the Department of Neurology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders
- Ministry of Education Key Laboratory of Child Development and Disorders
- Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders, Chongqing, China
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Chih-Cheng Lai, Hsueh CC, Hsu CK, Tsai YW, Hsueh PR. Disease burden and macrolide resistance of Mycoplasma pneumoniae infection in adults in the Asia-Pacific region. Int J Antimicrob Agents 2024; 64:107205. [PMID: 38754527 DOI: 10.1016/j.ijantimicag.2024.107205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/30/2024] [Accepted: 05/09/2024] [Indexed: 05/18/2024]
Abstract
OBJECTIVES In the Asia-Pacific region, Mycoplasma pneumoniae (MP) could be a notable pathogen responsible for adult community-acquired pneumonia (CAP), with varying prevalence rates. This comprehensive review aimed to explore the epidemiology, clinical manifestations, macrolide resistance, and molecular characteristics of MP in adults across several countries in Asia. METHODS PubMed, Embase, and Google Scholar were searched for relevant articles from 2010-2023 based on the following keywords: adult and Mycoplasma pneumoniae. RESULTS The prevalence of MP in CAP patients in these countries ranged from 2.1% in Korea to 25.5% in Japan. Macrolide resistance was prominent, particularly in China, with rates ranging 26.9-100%. Clinical manifestations of MP infection included protean extrapulmonary manifestations, and complications such as rhabdomyolysis and thrombocytopenia. Molecular characteristics, especially the multiple locus variable-number tandem-repeat analysis type 4/5/7/2, remained predominant across various countries, emphasising the importance of ongoing surveillance. CONCLUSIONS This review highlights the urgent need for continued monitoring of MP infections, macrolide resistance, and molecular characteristics to inform effective prevention and treatment strategies in the Asia-Pacific region.
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Affiliation(s)
- Chih-Cheng Lai
- Division of Hospital Medicine, Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan; School of Medicine, College of Medicine, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Chun-Chung Hsueh
- Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chi-Kuei Hsu
- Department of Internal Medicine, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan; School of Medicine for International Students, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | - Ya-Wen Tsai
- Center for Integrative Medicine, Chi Mei Medical Center, Tainan, Taiwan
| | - Po-Ren Hsueh
- Division of Infectious Diseases, Department of Internal Medicine, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan; Department of Laboratory Medicine, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan.
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Wang F, Cheng Q, Duo H, Wang J, Yang J, Jing S, Li J, Zhou X, Shang Y, Chen N, Tian Z, Zhang H, Cai X. Childhood Mycoplasma pneumoniae: epidemiology and manifestation in Northeast and Inner Mongolia, China. Microbiol Spectr 2024; 12:e0009724. [PMID: 38606996 PMCID: PMC11064562 DOI: 10.1128/spectrum.00097-24] [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: 01/11/2024] [Accepted: 03/18/2024] [Indexed: 04/13/2024] Open
Abstract
Mycoplasma pneumoniae (MP) is commonly detected in children. However, the epidemiological trends of MP in Northeast (NE) China are unclear. This retrospective study aimed to investigate the prevalence of MP infections in this understudied region. The clinical manifestations and bronchoscopic findings observed in hospitalized patients with severe Mycoplasma pneumoniae pneumonia (SMPP) were collected from comprehensive data obtained from six tertiary hospitals in NE and Inner Mongolian (IM) China, from 1 January 2017 to 31 December 2023. A total of 5,593,530 children who visited the outpatient and emergency departments, and 412,480 inpatient hospitalized children were included in the study. The positivity rate of MP immunoglobulin M (IgM) in the children who visited the outpatient and emergency departments varied from 7.80% to 10.12%, whereas that of MP infection in hospitalized children ranged from 27.18% to 30.10%. Children hospitalized for MP infection were mainly concentrated in the 1- to 4-year (41.39%) and 4- to 7-year (24.25%) age groups. Before 2020, the season with the highest incidence of MP was winter. After the implementation of non-pharmaceutical interventions (NPIs), the MP epidemic season changed, and the number of children with MP infections decreased; however, the proportion of MP infections in hospitalized children did not change significantly. Starting from August 2023, the MP infection rate in outpatient, emergency, and hospitalized children increased sharply, with SMPP and its complications (e.g., plastic bronchitis and pleural effusion) increasing significantly. MP is prevalent in NE and IM, China. When the NPIs ended, MP infection showed a delayed outbreak trend, and the number of children with severe infection increased significantly. IMPORTANCE In Northeastern (NE) and Inner Mongolia (IM), the incidence of Mycoplasma pneumoniae (MP) infections, including severe Mycoplasma pneumoniae pneumonia (SMPP), is high, posing health risks and imposing substantial economic burdens on the local population. Therefore, it is imperative to prioritize the study of MP prevalence and address the research gaps in MP epidemiology in these areas of China. We obtained a comprehensive collection of pediatric outpatient, emergency, and inpatient data from six public Grade III hospitals. We believe that our study makes a significant contribution to the literature because understanding regional variations in MP infections can help healthcare professionals tailor prevention and treatment strategies, and studying bronchoscopic manifestations can provide insights into the impact of the disease on the respiratory system, potentially leading to a more effective clinical management.
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Affiliation(s)
- Fei Wang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Qi Cheng
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Hongying Duo
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Jichun Wang
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Jingjing Yang
- Diagnosis and Treatment Center for Children, The Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Shujun Jing
- Department of Respiratory Medicine, Dalian Women and Children’s Medical Center Group, Dalian, Liaoning, China
| | - Jing Li
- Department of Pediatrics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Xiandong Zhou
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yunxiao Shang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Ning Chen
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Zhiliang Tian
- Department of Pediatrics, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Han Zhang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xuxu Cai
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
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Schweon SJ. Global reemergence of Mycoplasma pneumoniae. Nursing 2024; 54:11-12. [PMID: 38640025 DOI: 10.1097/01.nurse.0001009980.22449.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Affiliation(s)
- Steven J Schweon
- Steven Schweon is an infection prevention consultant in Saylorsburg, Pa
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Huang W, Hao J, Zhang Y. Intracardiac and Cerebral Thrombosis Complicated With Mycoplasma Pneumonia. Cureus 2024; 16:e60563. [PMID: 38887349 PMCID: PMC11182671 DOI: 10.7759/cureus.60563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2024] [Indexed: 06/20/2024] Open
Abstract
A seven-year-old girl developed multiposition thrombosis after fever and respiratory symptoms. Chest computed tomography (CT) scan demonstrated bilateral infiltrates, consolidation of the right lower lobe, and pleural effusion in the right lung field. Brain magnetic resonance imaging (MRI) showed multiple abnormal signals in the brain with limited diffusion, and cerebral infarction could not be excluded. Echocardiography revealed hypoechoic mitral valve tips, which are likely to be suspected as vegetation. Mycoplasma pneumoniae infection was clarified by a four-fold increase in IgG antibodies to M. pneumoniae sera. D-dimer levels were elevated increasingly. We found and reported this rare pediatric case of an M. pneumoniae-induced severe pneumonia complicated with intracardiac and cerebral thrombosis. We investigate the clinical characteristics, diagnosis, and treatment of refractory mycoplasma pneumonia complicated with intracardiac and cerebral thrombosis in children.
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Affiliation(s)
| | - Jingxia Hao
- Pediatric Cardiovascular Disease, Children's Hospital of Hebei Province, Shijiazhuang, CHN
| | - Yingqian Zhang
- Pulmonology, Children's Hospital of Hebei Province, Shijiazhuang, CHN
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Yang Z, Zhou J, Su N, Zhang Z, Chen J, Liu P, Ling P. Insights into the defensive roles of lncRNAs during Mycoplasma pneumoniae infection. Front Microbiol 2024; 15:1330660. [PMID: 38585701 PMCID: PMC10995346 DOI: 10.3389/fmicb.2024.1330660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 02/27/2024] [Indexed: 04/09/2024] Open
Abstract
Mycoplasma pneumoniae causes respiratory tract infections, affecting both children and adults, with varying degrees of severity ranging from mild to life-threatening. In recent years, a new class of regulatory RNAs called long non-coding RNAs (lncRNAs) has been discovered to play crucial roles in regulating gene expression in the host. Research on lncRNAs has greatly expanded our understanding of cellular functions involving RNAs, and it has significantly increased the range of functions of lncRNAs. In lung cancer, transcripts associated with lncRNAs have been identified as regulators of airway and lung inflammation in a process involving protein complexes. An excessive immune response and antibacterial immunity are closely linked to the pathogenesis of M. pneumoniae. The relationship between lncRNAs and M. pneumoniae infection largely involves lncRNAs that participate in antibacterial immunity. This comprehensive review aimed to examine the dysregulation of lncRNAs during M. pneumoniae infection, highlighting the latest advancements in our understanding of the biological functions and molecular mechanisms of lncRNAs in the context of M. pneumoniae infection and indicating avenues for investigating lncRNAs-related therapeutic targets.
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Affiliation(s)
- Zhujun Yang
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
- Institute of Pathogenic Biology, Basic Medical School, Hengyang Medical School, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, China
| | - Junjun Zhou
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
- Institute of Pathogenic Biology, Basic Medical School, Hengyang Medical School, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, China
| | - Nana Su
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
- Institute of Pathogenic Biology, Basic Medical School, Hengyang Medical School, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, China
| | - Zifan Zhang
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
- Institute of Pathogenic Biology, Basic Medical School, Hengyang Medical School, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, China
| | - Jiaxin Chen
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
- Institute of Pathogenic Biology, Basic Medical School, Hengyang Medical School, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, China
| | - Peng Liu
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
- Institute of Pathogenic Biology, Basic Medical School, Hengyang Medical School, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, China
| | - Peng Ling
- Department of Critical Care Medicine, The Central Hospital of Shaoyang City and Affiliated Shaoyang Hospital, Hengyang Medical College, University of South China, Shaoyang, China
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10
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Wang S, Wan Y, Zhang W. The Clinical Value of Systemic Immune Inflammation Index (SII) in Predicting the Severity of Hospitalized Children with Mycoplasma Pneumoniae Pneumonia: A Retrospective Study. Int J Gen Med 2024; 17:935-942. [PMID: 38495920 PMCID: PMC10944171 DOI: 10.2147/ijgm.s451466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/20/2024] [Indexed: 03/19/2024] Open
Abstract
Objective The Systemic Immune Inflammation Index (SII), as a novel inflammation biomarker that comprehensively reflects the inflammatory and immune status of the body, has not been reported in studies on Mycoplasma pneumoniae pneumonia (MPP) in children. This study aims to investigate whether SII can serve as an effective indicator for evaluating the condition of MPP. Methods This study recruited a total of 304 hospitalized patients with mycoplasma pneumoniae pneumonia (MPP), including 78 patients with severe MPP (SMPP) and 226 patients with non-SMPP. Univariate analysis using chi-square test, t-test, and Mann-Whitney U-test was conducted to analyze the clinical data of the patients. Logistic regression analysis was employed to identify the main risk factors for SMPP. Receiver operating characteristic curves were plotted to evaluate the potential of using neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), systemic immune-inflammation index (SII), and systemic immune response index (SIRI) to predict the severity of MPP. Results The ROC curve results show that patients with SII values ≥ 699.00 are more likely to develop severe MPP (sensitivity=0.876, specificity=0.987, AUC=0.940), and the predictive value of SII is significantly better than that of NLR, PLR, and SIRI. The results of multivariate logistic regression analysis indicate that SII can serve as a major risk factor for distinguishing non-SMPP from SMPP. Conclusion This study suggests that SII may be an effective indicator for predicting the severity of MPP in children. SII is more sensitive and specific than NLR, PLR, and SIRI in evaluating the condition of MPP.
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Affiliation(s)
- Shuye Wang
- Bengbu Medical University, Bengbu, 233000, People’s Republic of China
- Department of Pediatrics, Changzhou No.2 People’s Hospital, the Affiliated Hospital of Nanjing Medical University, Changzhou, 213000, People’s Republic of China
| | - Yu Wan
- Department of Pediatrics, Changzhou No.2 People’s Hospital, the Affiliated Hospital of Nanjing Medical University, Changzhou, 213000, People’s Republic of China
| | - Wenbo Zhang
- Department of Pediatrics, Changzhou No.2 People’s Hospital, the Affiliated Hospital of Nanjing Medical University, Changzhou, 213000, People’s Republic of China
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11
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Shen T, Li Y, Liu T, Lian Y, Kong L. Association between Mycoplasma pneumoniae infection, high‑density lipoprotein metabolism and cardiovascular health (Review). Biomed Rep 2024; 20:39. [PMID: 38357242 PMCID: PMC10865299 DOI: 10.3892/br.2024.1729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 01/09/2024] [Indexed: 02/16/2024] Open
Abstract
The association between Mycoplasma pneumoniae (M. pneumoniae) infection, high-density lipoprotein metabolism and cardiovascular disease is an emerging research area. The present review summarizes the basic characteristics of M. pneumoniae infection and its association with high-density lipoprotein and cardiovascular health. M. pneumoniae primarily invades the respiratory tract and damages the cardiovascular system through various mechanisms including adhesion, invasion, secretion of metabolites, production of autoantibodies and stimulation of cytokine production. Additionally, the present review highlights the potential role of high-density lipoprotein for the development of prevention and intervention of M. pneumoniae infection and cardiovascular disease, and provides suggestions for future research directions and clinical practice. It is urgent to explore the specific mechanisms underlying the association between M. pneumoniae infection, high-density lipoprotein metabolism, and cardiovascular disease and analyze the roles of the immune system and inflammatory response.
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Affiliation(s)
- Tao Shen
- Department of Clinical Laboratory, Jincheng People's Hospital, Jincheng, Shanxi 048000, P.R. China
- Jincheng Hospital Affiliated to Changzhi Medical College, Jincheng, Shanxi 048000, P.R. China
| | - Yanfang Li
- Department of Clinical Laboratory, Jincheng People's Hospital, Jincheng, Shanxi 048000, P.R. China
- Jincheng Hospital Affiliated to Changzhi Medical College, Jincheng, Shanxi 048000, P.R. China
| | - Tingting Liu
- Department of Clinical Laboratory, Jincheng People's Hospital, Jincheng, Shanxi 048000, P.R. China
- Jincheng Hospital Affiliated to Changzhi Medical College, Jincheng, Shanxi 048000, P.R. China
| | - Yunzhi Lian
- Department of Clinical Laboratory, Jincheng People's Hospital, Jincheng, Shanxi 048000, P.R. China
- Jincheng Hospital Affiliated to Changzhi Medical College, Jincheng, Shanxi 048000, P.R. China
| | - Luke Kong
- Department of Clinical Laboratory, Jincheng People's Hospital, Jincheng, Shanxi 048000, P.R. China
- Jincheng Hospital Affiliated to Changzhi Medical College, Jincheng, Shanxi 048000, P.R. China
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Barbosa MS, Sampaio BA, Spergser J, Rosengarten R, Marques LM, Chopra-Dewasthaly R. Mycoplasma agalactiae Vaccines: Current Status, Hurdles, and Opportunities Due to Advances in Pathogenicity Studies. Vaccines (Basel) 2024; 12:156. [PMID: 38400139 PMCID: PMC10892753 DOI: 10.3390/vaccines12020156] [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] [Received: 12/20/2023] [Revised: 01/26/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
Contagious agalactia (CA) is a serious multietiological disease whose classic etiological agent is Mycoplasma agalactiae and which causes high morbidity and mortality rates in infected herds. CA is classified as a notifiable disease by the World Organization for Animal Health due to its significant worldwide economic impact on livestock, primarily involving goat and sheep farms. The emergence of atypical symptoms and strains of M. agalactiae in wildlife ungulates reestablishes its highly plastic genome and is also of great epidemiological significance. Antimicrobial therapy is the main form of control, although several factors, such as intrinsic antibiotic resistance and the selection of resistant strains, must be considered. Available vaccines are few and mostly inefficient. The virulence and pathogenicity mechanisms of M. agalactiae mainly rely on surface molecules that have direct contact with the host. Because of this, they are essential for the development of vaccines. This review highlights the currently available vaccines and their limitations and the development of new vaccine possibilities, especially considering the challenge of antigenic variation and dynamic genome in this microorganism.
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Affiliation(s)
- Maysa Santos Barbosa
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitoria da Conquista 45029-094, Brazil; (M.S.B.)
| | | | - Joachim Spergser
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210 Wien, Austria
| | - Renate Rosengarten
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210 Wien, Austria
| | - Lucas Miranda Marques
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitoria da Conquista 45029-094, Brazil; (M.S.B.)
- Department of Microbiology, State University of Santa Cruz (UESC), Ilheus 45662-900, Brazil
- Department of Microbiology, Institute of Biomedical Science, University of São Paulo, Sao Paulo 05508-000, Brazil
| | - Rohini Chopra-Dewasthaly
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210 Wien, Austria
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Wang N, Chen Y, Qu X, Bian X, Hu J, Xu X, Xiao L, Liu Y, Zhang J. In vitro pharmacodynamics of nemonoxacin and other antimicrobial agents against Mycoplasma pneumoniae. Microbiol Spectr 2023; 11:e0243123. [PMID: 37975686 PMCID: PMC10715200 DOI: 10.1128/spectrum.02431-23] [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: 06/09/2023] [Accepted: 10/14/2023] [Indexed: 11/19/2023] Open
Abstract
IMPORTANCE This study first reported the in vitro effector kinetics of the new non-fluorinated quinolone, nemonoxacin, against macrolide-resistant M. pneumoniae (MRMP) and macrolide susceptible M. pneumoniae (MSMP) strains along with other antimicrobial agents. The time-kill assays and pharmacodynamic analysis showed that nemonoxacin has significant mycoplasmacidal activity against MRMP and MSMP. This study paves the road to establish appropriate dosing protocols of a new antimicrobial drug for children infected with M. pneumoniae.
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Affiliation(s)
- Na Wang
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
- Department of Medical Oncology, Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Yuancheng Chen
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
- Phase I Unit, Huashan Hospital, Fudan University, Shanghai, China
| | - Xingyi Qu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
- Phase I Unit, Huashan Hospital, Fudan University, Shanghai, China
| | - Xingchen Bian
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
- Phase I Unit, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiali Hu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaogang Xu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Li Xiao
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Yang Liu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Jing Zhang
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Shanghai, China
- National Health Commission & National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
- Phase I Unit, Huashan Hospital, Fudan University, Shanghai, China
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14
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Song Z, Jia G, Luo G, Han C, Zhang B, Wang X. Global research trends of Mycoplasma pneumoniae pneumonia in children: a bibliometric analysis. Front Pediatr 2023; 11:1306234. [PMID: 38078315 PMCID: PMC10704248 DOI: 10.3389/fped.2023.1306234] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 11/13/2023] [Indexed: 04/13/2024] Open
Abstract
BACKGROUND Mycoplasma pneumoniae pneumonia (MPP), attributable to Mycoplasma pneumoniae (MP), represents a predominant form of community-acquired pneumonia in pediatric populations, thereby posing a significant threat to pediatric health. Given the burgeoning volume of research literature associated with pediatric MPP in recent years, it becomes imperative to undertake a bibliometric analysis aimed at delineating the current research landscape and emerging trends, thereby furnishing a framework for subsequent investigations. METHODS A comprehensive literature search targeting pediatric MPP was conducted in the Web of Science Core Collection. After the removal of duplicate entries through Endnote software, the remaining articles were subject to scientometric analysis via Citespace software, VOSviewer software and R language, focusing on variables such as publication volume, contributing nations, institutions and authors, references and keywords. RESULTS A total of 1,729 articles pertinent to pediatric MPP were included in the analysis. China and the United States emerged as the nations with the highest publication output. Italian scholar Susanna Esposito and Japanese scholar Kazunobu Ouchi were the most influential authors in the domain of pediatric MPP. Highly-cited articles primarily focused on the epidemiological investigation of pediatric MPP, the clinical characteristics and treatment of macrolide-resistant MPP, and biomarkers for refractory Mycoplasma pneumoniae pneumonia (RMPP). From the corpus of 1,729 articles, 636 keywords were extracted and categorized into ten clusters: Cluster #0 centered on molecular-level typing of macrolide-resistant strains; Cluster #1 focused on lower respiratory tract co-infections; Clusters #2 and #6 emphasized other respiratory ailments caused by MP; Cluster #3 involved biomarkers and treatment of RMPP; Clusters #4 and #9 pertained to extrapulmonary complications of MPP, Clusters #5 and #7 addressed etiological diagnosis of MPP, and Cluster #8 explored pathogenic mechanisms. CONCLUSIONS The past few years have witnessed extensive attention directed towards pediatric MPP. Research in pediatric MPP principally revolves around diagnostic techniques for MP, macrolide resistance, complications of MPP, treatment and diagnosis of RMPP, and elucidation of pathogenic mechanisms. The present study provides pediatric clinicians and researchers with the research status and focal points in this field, thereby guiding the orientation of future research endeavors.
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Affiliation(s)
- Zhe Song
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Guangyuan Jia
- Department of Pediatrics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Guangzhi Luo
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Chengen Han
- Department of Pediatrics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Baoqing Zhang
- Department of Pediatrics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xiao Wang
- Department of Pediatrics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
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15
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王 淑, 张 文, 万 瑜. [Construction of a predictive model for performing bronchoalveolar lavage in children with Mycoplasma pneumoniae pneumonia and pulmonary consolidation]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2023; 25:1052-1058. [PMID: 37905763 PMCID: PMC10621064 DOI: 10.7499/j.issn.1008-8830.2305113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 08/30/2023] [Indexed: 11/02/2023]
Abstract
OBJECTIVES To investigate the risk factors for performing bronchoalveolar lavage (BAL) in children with Mycoplasma pneumoniae pneumonia (MPP) and pulmonary consolidation, and to construct a predictive model for performing BAL in these children. METHODS A retrospective analysis was performed for the clinical data of 202 children with MPP who were hospitalized in the Department of Pediatrics, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, from August 2019 to September 2022. According to whether BAL was performed, they were divided into BAL group with 100 children and non-BAL group with 102 children. A multivariate logistic regression analysis was used to identify the risk factors for performing BAL in MPP children with pulmonary consolidation. Rstudio software (R4.2.3) was used to establish a predictive model for performing BAL, and the receiver operator characteristic (ROC) curve, C-index, and calibration curve were used to assess the predictive performance of the model. RESULTS The multivariate logistic regression analysis demonstrated that the fever duration, C-reactive protein levels, D-dimer levels, and presence of pleural effusion were risk factors for performing BAL in MPP children with pulmonary consolidation (P<0.05). A nomogram predictive model was established based on the results of the multivariate logistic regression analysis. In the training set, this model had an area under the ROC curve of 0.915 (95%CI: 0.827-0.938), with a sensitivity of 0.826 and a specificity of 0.875, while in the validation set, it had an area under the ROC curve of 0.983 (95%CI: 0.912-0.996), with a sensitivity of 0.879 and a specificity of 1.000. The Bootstrap-corrected C-index was 0.952 (95%CI: 0.901-0.986), and the calibration curve demonstrated good consistency between the predicted probability of the model and the actual probability of occurrence. CONCLUSIONS The predictive model established in this study can be used to assess the likelihood of performing BAL in MPP children with pulmonary consolidation, based on factors such as fever duration, C-reactive protein levels, D-dimer levels, and the presence of pleural effusion. Additionally, the model demonstrates good predictive performance.
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Ding N, Lei A, Shi Z, Xiang L, Wei B, Wu Y. Total Flavonoids from Camellia oleifera Alleviated Mycoplasma pneumoniae-Induced Lung Injury via Inhibition of the TLR2-Mediated NF-κB and MAPK Pathways. Molecules 2023; 28:7077. [PMID: 37894556 PMCID: PMC10609408 DOI: 10.3390/molecules28207077] [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: 09/14/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/29/2023] Open
Abstract
Mycoplasma pneumoniae (M. pneumoniae) is an atypical bacterial pathogen responsible for community-acquired pneumonia primarily among school-aged children and young adults. Camellia oleifera (C. oleifera) has been used as a medicinal and edible plant in China for centuries, the constituents from which possessed various bioactivities. Notably, flavonoids existing in residues of C. oleifera defatted seeds exhibited significant anti-inflammatory activities. In the present study, we investigated the impact of total flavonoids from C. oleifera (TFCO) seed extract on M. pneumoniae pneumonia. TFCO was obtained using multiple column chromatography methods and identified as kaempferol glycosides via UPLC-HRESIMS. In a M. pneumoniae pneumonia mouse model, TFCO significantly reduced the lung damage, suppressed IL-1β, IL-6, and TNF-α production, and curbed TLR2 activation triggered by M. pneumoniae. Similarly, in RAW264.7 macrophage cells stimulated by lipid-associated membrane proteins (LAMPs), TFCO suppressed the generation of proinflammatory cytokines and TLR2 expression. Moreover, TFCO diminished the phosphorylation of IκBα, JNK, ERK, p38, and p65 nuclear translocation in vitro. In conclusion, TFCO alleviated M. pneumoniae-induced lung damage via inhibition of TLR2-mediated NF-κB and MAPK pathways, suggesting its potential therapeutic application in M. pneumoniae-triggered lung inflammation.
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Affiliation(s)
- Nan Ding
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang 421001, China (A.L.)
| | - Aihua Lei
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang 421001, China (A.L.)
| | - Zhisheng Shi
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang 421001, China (A.L.)
| | - Lin Xiang
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang 421001, China (A.L.)
| | - Bo Wei
- Research Lab of Translational Medicine, Hengyang Medical College, University of South China, Hengyang 421001, China
| | - Yimou Wu
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang 421001, China (A.L.)
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17
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Marquart E, Kinaciyan T. Overlapping clinical presentation of Mycoplasma-induced rash and mucositis and drug-induced Stevens Johnson Syndrome: A case report. IDCases 2023; 33:e01888. [PMID: 37693950 PMCID: PMC10484956 DOI: 10.1016/j.idcr.2023.e01888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 08/26/2023] [Accepted: 08/27/2023] [Indexed: 09/12/2023] Open
Abstract
Introduction Mycoplasma pneumoniae is a worldwide occurring common bacterial agent for community-acquired pneumonia especially in children and young people with high contagiousness. Extrapulmonary complications such as cardiopulmonary, gastrointestinal, neurological and mucocutaneous manifestations including Mycoplasma pneumoniae-induced rash and mucositis (MIRM) may occur especially in adults. MIRM is an important differential diagnosis of Stevens Johnson Syndrome (SJS). Both clinically present similar as mucocutaneous erosive eruptions but have different etiologies. Case presentation We present an atypical case of a 36-year-old female with overlapping clinical features of MIRM and SJS. The patient presented to our allergy-outpatient clinic after recovering from mucocutaneous erosive eruptions and receiving an allergy-passport upon discharge for all drugs administered during the course of treatment including a subsequent ban of all beta-lactam antibiotics and NSAIDs for the future resulting in a desperate patient and treating physicians. A positive result of Mycoplasma pneumoniae in the sputum culture upon discharge was unnoticed. An allergological work-up with skin testing and drug provocation testing with the culprit drugs and safe alternatives was performed which resulted negative. Therefore, a new allergy passport was issued with drug alternatives that the patient may use in the future. A diagnosis of MIRM was subsequently made. Discussion The present case report depicts the diagnostic algorithm in an atypical case with overlapping clinical features of a MIRM and SJS. Conclusion Patients with atypical mucocutaneous eruptions of possible allergological etiology should receive a careful allergological work-up in an experienced tertiary referral center to reduce the number of inadequate allergy passport distribution.
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Affiliation(s)
- Elias Marquart
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Tamar Kinaciyan
- Correspondence to: Department of Dermatology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
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Iannuzo N, Dy ABC, Guerra S, Langlais PR, Ledford JG. The Impact of CC16 on Pulmonary Epithelial-Driven Host Responses during Mycoplasma pneumoniae Infection in Mouse Tracheal Epithelial Cells. Cells 2023; 12:1984. [PMID: 37566063 PMCID: PMC10416898 DOI: 10.3390/cells12151984] [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: 05/31/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/12/2023] Open
Abstract
Club Cell Secretory Protein (CC16) plays many protective roles within the lung; however, the complete biological functions, especially regarding the pulmonary epithelium during infection, remain undefined. We have previously shown that CC16-deficient (CC16-/-) mouse tracheal epithelial cells (MTECs) have enhanced Mp burden compared to CC16-sufficient (WT) MTECs; therefore, in this study, we wanted to further define how the pulmonary epithelium responds to infection in the context of CC16 deficiency. Using mass spectrometry and quantitative proteomics to analyze proteins secreted apically from MTECs grown at an air-liquid interface, we investigated the protective effects that CC16 elicits within the pulmonary epithelium during Mycoplasma pneumoniae (Mp) infection. When challenged with Mp, WT MTECs have an overall reduction in apical protein secretion, whereas CC16-/- MTECs have increased apical protein secretion compared to their unchallenged controls. Following Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) assessment, many of the proteins upregulated from CC16-/- MTECS (unchallenged and during Mp infection) were related to airway remodeling, which were not observed by WT MTECs. These findings suggest that CC16 may be important in providing protection within the pulmonary epithelium during respiratory infection with Mp, which is the major causative agent of community-acquired pneumoniae.
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Affiliation(s)
- Natalie Iannuzo
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ 85724, USA;
| | | | - Stefano Guerra
- Asthma and Airway Disease Research Center, Tucson, AZ 85724, USA
| | - Paul R. Langlais
- Department of Medicine, Division of Endocrinology, University of Arizona, Tucson, AZ 85724, USA
| | - Julie G. Ledford
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ 85724, USA;
- Asthma and Airway Disease Research Center, Tucson, AZ 85724, USA
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19
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Gan T, Yu J, He J. miRNA, lncRNA and circRNA: targeted molecules with therapeutic promises in Mycoplasma pneumoniae infection. Arch Microbiol 2023; 205:293. [PMID: 37477725 DOI: 10.1007/s00203-023-03636-3] [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: 05/22/2023] [Revised: 07/02/2023] [Accepted: 07/11/2023] [Indexed: 07/22/2023]
Abstract
Mycoplasma pneumoniae (MP) is primarily recognized as a respiratory pathogen that causes community-acquired pneumonia, which can lead to acute upper and lower airway inflammation and extrapulmonary syndrome. Refractory pneumonia caused by MP can cause severe complications and even be life-threatening, particularly in infants and the elderly. It is well-known that non-coding RNAs (ncRNAs) represented by miRNAs, lncRNAs and circRNAs have been manifested to be widely involved in the regulation of gene expression. Growing evidence indicates that these ncRNAs have distinct differentiated expression in MP infection and affect multiple biological processes, playing an indispensable role in the initiation and promotion of MP infection. However, the epigenetic mechanisms involved in the development of MP infection remain unclear. This article reviews the mechanisms by which miRNAs, lncRNAs, and circRNAs mediate MP infection, such as inflammatory responses, apoptosis and pulmonary fibrosis. Focusing on miRNAs, lncRNAs and circRNAs associated with MP infection could provide new insights into this disease's early diagnosis and therapeutic approaches.
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Affiliation(s)
- Tian Gan
- The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Jianwei Yu
- The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Jun He
- The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
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Wang Y, Liu K, Chen C, Zhang C. Acetylcysteine and budesonide for the treatment of refractory Mycoplasma pneumoniae pneumonia in children: a clinical observation. Ital J Pediatr 2023; 49:80. [PMID: 37422684 DOI: 10.1186/s13052-023-01491-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 06/30/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND To examine the clinical impact of bronchoscope alveolar lavage (BAL) combination with budesonide, ambroxol + budesonide, or acetylcysteine + budesonide in the treatment of refractory Mycoplasma pneumoniae pneumonia (RMPP). METHODS Eighty-two RMPP patients admitted to Pediatrics at The First People's Hospital of Zhengzhou were retrospectively evaluated between August 2016 and August 2019. All patients were administered BAL in addition to intravenous Azithromycin, expectoration, and nebulizer inhalation. The medications added to the BLA separated the patients into the Budesonide group, Ambroxol + budesonide group, and acetylcysteine + budesonide group. Analyzed were the variations in laboratory examination indices, improvement in lung imaging, overall effective rate, and adverse responses in the three groups. RESULTS The laboratory test indices of patients in all three groups improved significantly relative to pre-treatment levels, and the results were statistically significant. After therapy, there were no significant differences between the three groups in terms of white blood cell (WBC), C-reactive protein (CRP), or erythrocyte sedimentation rate (ESR). Serum lactate dehydrogenase (LDH) and serum ferritin (SF) varied significantly across the three groups (P < 0.05). In the acetylcysteine + budesonide group, the absorption rate of lung imaging lesions and clinical efficacy were superior to those of the other two groups. There were no significant differences between the three groups in the occurrence of adverse events (P > 0.05). CONCLUSIONS BLA-coupled acetylcysteine + budesonide was superior to the other two groups in enhancing the effectiveness of RMPP in children, which might increase lung opacity absorption and minimize lung inflammation.
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Affiliation(s)
- Yanli Wang
- Department of Pediatrics, South China Hospital, Medical School, Shenzhen University, Guangdong, China
| | - Kai Liu
- Pulmonary and Critical Care Medicine, Kunming Children`s Hospital, Kunming, China.
- Department of Pediatrics, The First People's Hospital of Yunnan Province, Kunming, China.
| | - Chuangui Chen
- Department of Pediatrics, South China Hospital, Medical School, Shenzhen University, Guangdong, China
| | - Chengyun Zhang
- Department of Pediatric, The First People's Hospital of Zhengzhou City, Zhengzhou, China
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21
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Ma C, Hao X, Gao L, Wang Y, Shi J, Luo H, Li M. Extracellular Vesicles Released from Macrophages Infected with Mycoplasma pneumoniae Stimulate Proinflammatory Response via the TLR2-NF-κB/JNK Signaling Pathway. Int J Mol Sci 2023; 24:ijms24108588. [PMID: 37239946 DOI: 10.3390/ijms24108588] [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] [Received: 03/15/2023] [Revised: 05/06/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Mycoplasma pneumoniae (M. pneumoniae, Mp) is an intracellular pathogen that causes pneumonia, tracheobronchitis, pharyngitis, and asthma in humans and can infect and survive in the host cells leading to excessive immune responses. Extracellular vesicles (EVs) from host cells carry components of pathogens to recipient cells and play a role in intercellular communication during infection. However, there is limited knowledge on whether EVs derived from M. pneumoniae-infected macrophages play as intercellular messengers and functional mechanisms. In this study, we establish a cell model of M. pneumoniae-infected macrophages that continuously secrete EVs to further asses their role as intercellular messengers and their functional mechanisms. Based on this model, we determined a method for isolating the pure EVs from M. pneumoniae-infected macrophages, which employs a sequence of operations, including differential centrifugation, filtering, and ultracentrifugation. We identified EVs and their purity using multiple methods, including electron microscopy, nanoparticle tracking analysis, Western blot, bacteria culture, and nucleic acid detection. EVs from M. pneumoniae-infected macrophages are pure, with a 30-200 nm diameter. These EVs can be taken up by uninfected macrophages and induce the production of tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, and IL-8 through the nuclear factor (NF)-κB, and mitogen-activated protein kinases (MAPK) signals pathway. Moreover, the expression of inflammatory cytokines induced by EVs relies on TLR2-NF-κB/JNK signal pathways. These findings will help us better understand a persistent inflammatory response and cell-to-cell immune modulation in the context of M. pneumoniae infection.
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Affiliation(s)
- Chunji Ma
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
| | - Xiujing Hao
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
| | - Liyang Gao
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
| | - Yongyu Wang
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
| | - Juan Shi
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
| | - Haixia Luo
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
| | - Min Li
- Life Science School, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan 750021, China
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Nuovo GJ. The rapid diagnosis of Mycoplasma pneumonia using in situ hybridization on clinical samples. Ann Diagn Pathol 2023; 63:152100. [PMID: 36608457 DOI: 10.1016/j.anndiagpath.2022.152100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 12/27/2022] [Indexed: 01/01/2023]
Abstract
The microbiological etiology of seasonal upper respiratory illnesses in the United States is dominated by viruses, including influenza A, B, respiratory syncytial virus, and SARS-CoV2. Mycoplasma pneumonia, treatable with antibiotics, can also cause upper respiratory symptoms and is typically associated with about 15 % of cases. There is no clinical or radiologic finding diagnostic of Mycoplasma pneumonia infection and PCR-based testing is not routinely used in the clinical setting. Further, the bacteria grows slowly in culture and the diagnostic IgM response will take days after the onset of infection. Thus, a rapid diagnostic test for Mycobacterium pneumonia infection is needed. This study documented two cases of Mycoplasma pneumonia infection of the upper respiratory system using in situ hybridization in a series of over 20 patients who were being tested for SARS-CoV2 infection. The respiratory secretions were placed on a glass slide, fixed in 10 % buffered formalin, and then tested using a Mycoplasma pneumonia probe. The high bacterial number associated with acute infection allowed for straightforward detection by in situ hybridization in a few hours. Antibiotic therapy led to rapid resolution of the symptoms. This highlights the ability of standard in situ hybridization as a rapid diagnostic test for Mycoplasma pneumonia in the clinical setting.
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Affiliation(s)
- Gerard J Nuovo
- Ohio State University Medical Center, Columbus, OH, USA; GnomeDx, Powell, OH, USA.
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23
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Changes of Mycoplasma pneumoniae prevalence in children before and after COVID-19 pandemic in Henan, China. J Infect 2023; 86:256-308. [PMID: 36646141 PMCID: PMC9838080 DOI: 10.1016/j.jinf.2022.12.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 12/21/2022] [Indexed: 01/15/2023]
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24
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Sprankel L, Vizarraga D, Martín J, Manger S, Meier-Credo J, Marcos M, Julve J, Rotllan N, Scheffer MP, Escolà-Gil JC, Langer JD, Piñol J, Fita I, Frangakis AS. Essential protein P116 extracts cholesterol and other indispensable lipids for Mycoplasmas. Nat Struct Mol Biol 2023; 30:321-329. [PMID: 36782049 PMCID: PMC10023570 DOI: 10.1038/s41594-023-00922-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 01/06/2023] [Indexed: 02/15/2023]
Abstract
Mycoplasma pneumoniae, responsible for approximately 30% of community-acquired human pneumonia, needs to extract lipids from the host environment for survival and proliferation. Here, we report a comprehensive structural and functional analysis of the previously uncharacterized protein P116 (MPN_213). Single-particle cryo-electron microscopy of P116 reveals a homodimer presenting a previously unseen fold, forming a huge hydrophobic cavity, which is fully accessible to solvent. Lipidomics analysis shows that P116 specifically extracts lipids such as phosphatidylcholine, sphingomyelin and cholesterol. Structures of different conformational states reveal the mechanism by which lipids are extracted. This finding immediately suggests a way to control Mycoplasma infection by interfering with lipid uptake.
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Affiliation(s)
- Lasse Sprankel
- Buchmann Institute for Molecular Life Sciences and Institute of Biophysics, Goethe University Frankfurt, Frankfurt, Germany
| | - David Vizarraga
- Instituto de Biología Molecular de Barcelona (IBMB-CSIC), Parc Científic de Barcelona, Barcelona, Spain
| | - Jesús Martín
- Instituto de Biología Molecular de Barcelona (IBMB-CSIC), Parc Científic de Barcelona, Barcelona, Spain
| | - Sina Manger
- Buchmann Institute for Molecular Life Sciences and Institute of Biophysics, Goethe University Frankfurt, Frankfurt, Germany
| | | | - Marina Marcos
- Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Josep Julve
- Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau and CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Noemi Rotllan
- Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau and CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Margot P Scheffer
- Buchmann Institute for Molecular Life Sciences and Institute of Biophysics, Goethe University Frankfurt, Frankfurt, Germany
| | - Joan Carles Escolà-Gil
- Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau and CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Julian D Langer
- Proteomics, Max Planck Institute of Biophysics, Frankfurt, Germany
- Proteomics, Max Planck Institute for Brain Research, Frankfurt, Germany
| | - Jaume Piñol
- Institut de Biotecnologia i Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Ignacio Fita
- Instituto de Biología Molecular de Barcelona (IBMB-CSIC), Parc Científic de Barcelona, Barcelona, Spain.
| | - Achilleas S Frangakis
- Buchmann Institute for Molecular Life Sciences and Institute of Biophysics, Goethe University Frankfurt, Frankfurt, Germany.
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25
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Mugunthan SP, Kannan G, Chandra HM, Paital B. Infection, Transmission, Pathogenesis and Vaccine Development against Mycoplasma gallisepticum. Vaccines (Basel) 2023; 11:vaccines11020469. [PMID: 36851345 PMCID: PMC9967393 DOI: 10.3390/vaccines11020469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/12/2023] [Accepted: 02/13/2023] [Indexed: 02/22/2023] Open
Abstract
Mycoplasma sp. comprises cell wall-less bacteria with reduced genome size and can infect mammals, reptiles, birds, and plants. Avian mycoplasmosis, particularly in chickens, is primarily caused by Mycoplasma gallisepticum (MG) and Mycoplasma synoviae. It causes infection and pathology mainly in the respiratory, reproductive, and musculoskeletal systems. MG is the most widely distributed pathogenic avian mycoplasma with a wide range of host susceptibility and virulence. MG is transmitted both by horizontal and vertical routes. MG infection induces innate, cellular, mucosal, and adaptive immune responses in the host. Macrophages aid in phagocytosis and clearance, and B and T cells play critical roles in the clearance and prevention of MG. The virulent factors of MG are adhesion proteins, lipoproteins, heat shock proteins, and antigenic variation proteins, all of which play pivotal roles in host cell entry and pathogenesis. Prevention of MG relies on farm and flock biosecurity, management strategies, early diagnosis, use of antimicrobials, and vaccination. This review summarizes the vital pathogenic mechanisms underlying MG infection and recapitulates the virulence factors of MG-host cell adhesion, antigenic variation, nutrient transport, and immune evasion. The review also highlights the limitations of current vaccines and the development of innovative future vaccines against MG.
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Affiliation(s)
| | - Ganapathy Kannan
- Institute of Infection, Veterinary & Ecology Sciences (IVES), University of Liverpool, Neston, Cheshire CH64 7TE, UK
| | - Harish Mani Chandra
- Department of Biotechnology, Thiruvalluvar University, Vellore 632115, India
- Correspondence: (H.M.C.); (B.P.)
| | - Biswaranjan Paital
- Redox Regulation Laboratory, Department of Zoology, College of Basic Science and Humanities, Odisha University of Agriculture and Technology, Bhubaneswar 751003, India
- Correspondence: (H.M.C.); (B.P.)
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26
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Zhou X, Jiang W, Zhou Q, Yang W. The role of serum inflammatory in mycoplasma pneumonia infection with respiratory asthma. J Asthma 2023:1-10. [PMID: 36511625 DOI: 10.1080/02770903.2022.2158101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE With the growing frequency of Mycoplasma pneumoniae infections linked to respiratory asthma (MP-RA), particularly in children, the quest for novel diagnostic molecular markers has become critical. We examined the link between serum immunoglobulin, inflammatory variables, vitamin A, and vitamin D levels in MP-RA patients and then found markedly diagnostic indicators. METHODS From January 2015 to March 2020, our hospital screened 55 cases of healthy control children (HC), 53 instances of mycoplasma pneumonia infection complicated with respiratory asthma (MP-RA), and 58 cases of non-respiratory asthma children for pneumonia mycoplasma infection (MP). Serum immunoglobulins, inflammatory markers, vitamin D, and vitamin A levels were analyzed, and a predictive model including the feature chosen in the least absolute shrinkage and selection operator regression model was developed. RESULTS Serum TNF- and IL-1b levels were greater in MP-RA children than in MP children, but 25(OH)D, IgG, and IgA levels were lower. Our findings verified the link between IgA, TNF-a, 25(OH)D, and vitamin A with MP-RA. In addition, TNF-a, IL-1b, 25(OH)D (Vit-D), IgG, and IgA were the predictors in the prediction nomogram, showing the combined influence of serum inflammation in MP-RA. C-index of 0.985 (95% CI: -1.25 to 1.68) shows high scaling ability and the model exhibits good discriminative capacity. With range validation, the high C-index value of 0.96 is still possible. CONCLUSION TNF-a, IL-1b, 25(OH)D (Vit-D), IgG, and IgA were considered as predictors in children with MP-RA was investigated in this research.
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Affiliation(s)
- Xiaoju Zhou
- Department of Infective disease, First Center Hospital, TianJin City, China
| | - Wei Jiang
- Department of Infective disease, First Center Hospital, TianJin City, China
| | - Qianyi Zhou
- Department of Infective disease, First Center Hospital, TianJin City, China
| | - Wenjie Yang
- Department of Infective disease, First Center Hospital, TianJin City, China
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27
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Shi J, Ma C, Hao X, Luo H, Li M. Reserve of Wnt/β-catenin Signaling Alleviates Mycoplasma pneumoniae P1-C-induced Inflammation in airway epithelial cells and lungs of mice. Mol Immunol 2023; 153:60-74. [PMID: 36444819 DOI: 10.1016/j.molimm.2022.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 10/13/2022] [Accepted: 11/02/2022] [Indexed: 11/26/2022]
Abstract
Mycoplasma pneumoniae (M. pneumoniae) is the most common pathogen of respiratory tract infections in both children and adults. M. pneumoniae P1 adhesin plays an important role in the pathogenesis of M. pneumoniae infection by mediating the attachment of pathogen to host cells. The inoculation of C-terminal residuals of P1 (P1-C) showed a protective role from M. pneumoniae infection. Accumulated evidence suggests that the Wnt/β-Catenin signaling is implicated in regulation of inflammatory responses to bacterial infections. However, mechanisms underlying the regulatory roles of Wnt signaling in host cells in response to M. pneumoniae infections are incompletely understood. In the present study, the impact and molecular mechanism of Wnt/β-catenin signaling in immune responses induced by M. pneumoniae P1-C were investigated. The results demonstrated that the P1-C could activate Wnt/β-catenin and Toll-like receptor (TLR) signaling in primary mouse airway epithelial cells cultured in an air-liquid interface (ALI) state. Interestingly, the inhibition of Wnt/β-catenin signaling by an adenovirus-mediated Wnt inhibitor Dickkopf-1 (Dkk1) gene transduction alleviated the P1-C induced inflammation fibrosis in mouse lung, accompanied by the reduced expression of epithelial mesenchymal transition (EMT) markers. Mechanistical analysis further demonstrated that the Dkk1 could suppress the expression of JAK2/STAT1-STAT3 and Caspase3, 8/Bax signaling in mouse lung tissues. In vitro study further revealed that XAV939, a small molecule of Wnt/β-catenin inhibitor, inhibited the P1-C-activated TLR4/MyD88 signaling and cytokine productions in primary mouse airway ALI epithelial cells. This study thus provides an insight into the function of Wnt/β-catenin signaling in regulation of the pathogenesis of M. pneumoniae infection, suggesting that targeting Wnt/β-catenin signaling by gene transduction of Dkk1, or pharmacological molecules of inhibitor may be a promised approach that worthy of further investigation in the treatment of M. pneumoniae pneumonia.
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Affiliation(s)
- Juan Shi
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources of Western China, College of Life Science, Ningxia University, Yinchuan, Ningxia, China; Department of Ningxia Key Laboratory of Clinical Pathogenic Microbiology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China
| | - Chunji Ma
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources of Western China, College of Life Science, Ningxia University, Yinchuan, Ningxia, China
| | - Xiujing Hao
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources of Western China, College of Life Science, Ningxia University, Yinchuan, Ningxia, China
| | - Haixia Luo
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources of Western China, College of Life Science, Ningxia University, Yinchuan, Ningxia, China
| | - Min Li
- Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources of Western China, College of Life Science, Ningxia University, Yinchuan, Ningxia, China.
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28
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Insight into the Pathogenic Mechanism of Mycoplasma pneumoniae. Curr Microbiol 2023; 80:14. [PMID: 36459213 PMCID: PMC9716528 DOI: 10.1007/s00284-022-03103-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 10/28/2022] [Indexed: 12/04/2022]
Abstract
Mycoplasma pneumoniae, an obligate parasitic pathogen without cell wall, can cause severe upper and lower respiratory tract symptoms. It is the pathogen of human bronchitis and walking pneumonia, and named community-acquired pneumonia. In addition to severe respiratory symptoms, there are clinical extrapulmonary manifestations in the skin, brain, kidney, musculoskeletal, digestive system, and even blood system after M. pneumoniae infection. Hereby, we comprehensively summarized and reviewed the intrapulmonary and extrapulmonary pathogenesis of M. pneumoniae infection. The pathogenesis of related respiratory symptoms caused by M. pneumoniae is mainly adhesion damage, direct damage including nutrient predation, invasion and toxin, cytokine induced inflammation damage and immune evasion effect. The pathogenesis of extrapulmonary manifestations includes direct damage mediated by invasion and inflammatory factors, indirect damage caused by host immune response, and vascular occlusion. The intrapulmonary and extrapulmonary pathogenic mechanisms of M. pneumoniae infection are independent and interrelated, and have certain commonalities. In fact, the pathogenic mechanisms of M. pneumoniae are complicated, and the specific content is still not completely clear, further researches are necessary for determining the detailed pathogenesis of M. pneumoniae. This review can provide certain guidance for the effective prevention and treatment of M. pneumoniae infection.
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29
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Zhang H, Li H, Wang L, Huang L, Ma Q, Wu H, Pang H, Chen Y, Ruan Z. Development of a model for early differentiation of adenovirus pneumonia from Mycoplasma pneumoniae pneumonia. Transl Pediatr 2022; 11:1766-1775. [PMID: 36506774 PMCID: PMC9732605 DOI: 10.21037/tp-22-6] [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] [Received: 01/05/2022] [Accepted: 06/06/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Adenovirus pneumonia (AVP) and Mycoplasma pneumoniae pneumonia (MPP) have similar clinical manifestations such as a high prevalence of lung consolidation, making the differential diagnosis difficult before the etiology is reported. This study aimed to compare AVP and MPP, and to build a predictive model to differentiate them early. METHODS We selected 198 cases of AVP and 876 cases of MPP. Clinical manifestations, computed tomography (CT) features, and biomarkers were compared. A logistic regression model was built to predict AVP. The area under the curve (AUC) of the receiver-operating characteristic was calculated to evaluate the discriminant ability of the prediction model. RESULTS Patients in the AVP group were mainly infants and toddlers, while the MPP group had more pre-school age children. The rate of hypoxemia and severe pneumonia was 3- and 11-times higher, respectively, in the AVP group than in the MPP group (5.6% vs. 1.8%, 27.8% vs. 2.5%, P<0.01). The proportion of patients with a Pediatric Logistic Organ Dysfunction-2 score ≥2 was 10 times higher in the AVP group than in the MPP group (17.4% vs. 1.7%, P<0.01). Bilateral pneumonia was present in 90.2% of the AVP group. Biomarkers, such as interleukin (IL)-2 receptor, IL-10 and lactic dehydrogenase (LDH), were considerably higher in the AVP group than in the MPP group (P<0.01). The predictive model included eight variables, namely: age, severe pneumonia, bilateral pneumonia, ground-glass attenuation, consolidation, atelectasis, C-reactive protein, and LDH. The AUC was 86.6%. CONCLUSIONS Compared with MPP, AVP affects younger children, presents a more severe respiratory tract involvement, results in a larger range of lung lesions, and is associated with higher inflammatory biomarkers. Our predictive model includes a combination of clinical features, imaging findings, and biomarkers. It may help pediatricians in the early differentiation of AVP from MPP.
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Affiliation(s)
- Hu Zhang
- Pediatric Infectious Department, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Pediatric Infectious Disease, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huajun Li
- Pediatric Infectious Department, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lijun Wang
- Pediatric Infectious Department, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lisu Huang
- Pediatric Infectious Department, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qibo Ma
- Emergency Department, Chuzhou Children's Hospital, The First People's Hospital of Chuzhou, Chuzhou, China
| | - Hanwen Wu
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huanchun Pang
- Department of Pediatrics, Chengmai County People's Hospital, Chengmai, China
| | - Yiping Chen
- Department of Pediatric Infectious Disease, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Zhengshang Ruan
- Pediatric Infectious Department, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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30
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Li L, Ma J, Guo P, Song X, Li M, Yu Z, Yu Z, Cheng P, Sun H, Zhang W. Molecular beacon based real-time PCR p1 gene genotyping, macrolide resistance mutation detection and clinical characteristics analysis of Mycoplasma pneumoniae infections in children. BMC Infect Dis 2022; 22:724. [PMID: 36068499 PMCID: PMC9447981 DOI: 10.1186/s12879-022-07715-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/29/2022] [Indexed: 11/10/2022] Open
Abstract
Background Mycoplasma pneumoniae can be divided into different subtypes on the basis of the sequence differences of adhesive protein P1, but the relationship between different subtypes, macrolide resistance and clinical manifestations are still unclear. In the present study, we established a molecular beacon based real-time polymerase chain reaction (real-time PCR) p1 gene genotyping method, analyzed the macrolide resistance gene mutations and the relationship of clinical characteristics with the genotypes. Methods A molecular beacon based real-time PCR p1 gene genotyping method was established, the mutation sites of macrolide resistance genes were analyzed by PCR and sequenced, and the relationship of clinical characteristics with the genotypes was analyzed. Results The detection limit was 1–100 copies/reaction. No cross-reactivity was observed in the two subtypes. In total, samples from 100 patients with positive M. pneumoniae detection results in 2019 and 2021 were genotyped using the beacon based real-time PCR method and P1-1 M. pneumoniae accounted for 69.0%. All the patients had the A2063G mutation in the macrolide resistance related 23S rRNA gene. Novel mutations were also found, which were C2622T, C2150A, C2202G and C2443A mutations. The relationship between p1 gene genotyping and the clinical characteristics were not statistically related. Conclusion A rapid and easy clinical application molecular beacon based real-time PCR genotyping method targeting the p1 gene was established. A shift from type 1 to type 2 was found and 100.0% macrolide resistance was detected. Our study provided an efficient method for genotyping M. pneumoniae, valuable epidemiological monitoring information and clinical treatment guidance to control high macrolide resistance. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07715-6.
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Affiliation(s)
- Lifeng Li
- Henan International Joint Laboratory of Children's Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China.,Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Jiayue Ma
- Henan International Joint Laboratory of Children's Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Pengbo Guo
- Henan International Joint Laboratory of Children's Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Xiaorui Song
- Henan International Joint Laboratory of Children's Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Mingchao Li
- Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Zengyuan Yu
- Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Zhidan Yu
- Henan International Joint Laboratory of Children's Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Ping Cheng
- Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Huiqing Sun
- Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China.
| | - Wancun Zhang
- Henan International Joint Laboratory of Children's Infectious Diseases, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China.
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31
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Liu Z, Dong WT, Wei WF, Huo JH, Wang WM. Exploring the mechanism of Qinbaiqingfei-concentrate pills in the treatment of Mycoplasma pneumoniae pneumonia from the perspective of intestinal microbiota and mucosal immunity. JOURNAL OF ETHNOPHARMACOLOGY 2022; 293:115308. [PMID: 35460847 DOI: 10.1016/j.jep.2022.115308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional Chinese medicine categorizes Mycoplasma pneumoniae pneumonia as "lung heat", and treatment with heat clear and detoxify. Traditional Chinese medicine believes that the lungs and intestines come from the same source, and the intestine is related to pneumonia. This is the same as the gut-lung axis theory. Qinbaiqingfei concentrate pills (QBs) were modified based on Cough San in the ancient medical book Medical Awareness. It clears lung heat, moisturizes the lungs and dredges collaterals, and has a good ability to treat Mycoplasma pneumoniae. AIM OF THE STUDY A rat model of Mycoplasma pneumoniae was established. From the aspect of intestinal flora and mucosal immunity, the potential mechanism of the QBs was researched. MATERIALS AND METHODS First, the content of Mycoplasma pneumoniae in lung tissue and the levels of the inflammatory factors IL-4, IL-10, TNF-α and INF-γ were detected. To determine the expression of NF-kB related proteins in lung tissue, which can understand the ability in treating disease. Next, metagenomic sequencing was performed to detect changes in short-chain fatty acids, proving the ability of the drug to regulate intestinal microecology. Finally, HDAC, LPS, SIgA, etc. were detected to facilitate the correlation of the overall experimental indicators. RESULTS QBs reduces the levels of IL-4, IL-10, TNF-α and INF-γ in the serum by inhibiting the expression of MyD88, IKKα, IκBα, and NF-κB p65 in lung tissue. In addition, QBs restores the ratio of gram-negative bacteria to gram-positive bacteria in the intestine, restores the secretion of acetic acid, propionic acid, butyric acid, isobutyric acid and isovaleric acid, and promotes the secretion of NF-κB p65 and SIgA by HDAC1/3. The result is that the lung tissue is repaired and the proliferation of Mycoplasma pneumoniae is inhibited. CONCLUSIONS From the "gut-lung axis", a new research perspective was discovered. QBs intervened in the intestines and lungs to treat Mycoplasma pneumoniae.
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Affiliation(s)
- Zheng Liu
- Heilongjiang Academy of Chinese Medicine Science, Institute of Chinese Materia Medica, Harbin, 15000, PR China
| | - Wen-Ting Dong
- Heilongjiang Academy of Chinese Medicine Science, Institute of Chinese Materia Medica, Harbin, 15000, PR China
| | - Wen-Feng Wei
- Heilongjiang Academy of Chinese Medicine Science, Institute of Chinese Materia Medica, Harbin, 15000, PR China
| | - Jin-Hai Huo
- Heilongjiang Academy of Chinese Medicine Science, Institute of Chinese Materia Medica, Harbin, 15000, PR China.
| | - Wei-Ming Wang
- Heilongjiang Academy of Chinese Medicine Science, Institute of Chinese Materia Medica, Harbin, 15000, PR China.
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32
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Zhang Z, Wan R, Yuan Q, Dou H, Tu P, Shi D, Fu X, Xin D. Cell damage and neutrophils promote the infection of Mycoplasma pneumoniae and inflammatory response. Microb Pathog 2022; 169:105647. [PMID: 35724831 DOI: 10.1016/j.micpath.2022.105647] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/30/2022] [Accepted: 06/14/2022] [Indexed: 10/18/2022]
Abstract
Mycoplasma pneumoniae (MP) is an important respiratory pathogen of human. The infection of MP can cause direct damage and immune damage in lung, resulting in Mycoplasma pneumoniae pneumonia (MPP). In this study, we aim to investigate the pathogenesis of MPP by detecting the proliferation of MP under conditions of cell damages and neutrophils in vitro. Firstly, we found the supplements of intracellular fluid, protein and RNA derived from intracellular fluid of A549 cells contribute to the survival of MP, thereby promoting the infection of MP. Cell damage can also significantly contribute to the survival of MP without supplements. At the same time, the additions of supplements contribute to apoptosis and the expression of IL-8 and IL-1β. Further, we found live neutrophils show bactericidal activity to MP, and the phagocytosis of MP promotes apoptosis of neutrophils. When co-incubated with MP and A549 cells, the proliferation of MP in the high neutrophils proportion groups were accelerated with functional decline of neutrophils, and the level of extracellular IL-1β showed a time and dose dependent manner to neutrophils. These results suggest that the release of intracellular nutrients by damaged cells and functional decline of neutrophils can promote the infection of MP and play roles in the activation of inflammatory response. Therefore, lung damage and infiltration of neutrophils would be important factors affecting the development of MPP.
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Affiliation(s)
- Zhikun Zhang
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China; Department of Pathogenic Biology, School of Basic Medicine Southwest Medical University, Xianglin Road 1#, Luzhou, 646000, China
| | - Ruijie Wan
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Qing Yuan
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Haiwei Dou
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Peng Tu
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Dawei Shi
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Xiaoyan Fu
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Deli Xin
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-an Road, Xicheng District, Beijing, 100050, China.
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Refractory Mycoplasma pneumoniae Pneumonia in Children: Early Recognition and Management. J Clin Med 2022; 11:jcm11102824. [PMID: 35628949 PMCID: PMC9144103 DOI: 10.3390/jcm11102824] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 11/17/2022] Open
Abstract
Refractory Mycoplasma pneumoniae pneumonia (RMPP) is a severe state of M. pneumoniae infection that has attracted increasing universal attention in recent years. The pathogenesis of RMPP remains unknown, but the excessive host immune responses as well as macrolide resistance of M. pneumoniae might play important roles in the development of RMPP. To improve the prognosis of RMPP, it is mandatory to recognize RMPP in the early stages, and the detection of macrolide-resistant MP, clinical unresponsiveness to macrolides and elevated proinflammatory cytokines might be clues. Timely and effective anti-mycoplasmal therapy and immunomodulating therapy are the main strategies for RMPP.
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Deng Z, Hu H, Tang D, Liang J, Su X, Jiang T, Hu X, Ying W, Zhen D, Xiao X, He J. Ultrasensitive, Specific, and Rapid Detection of Mycoplasma pneumoniae Using the ERA/CRISPR–Cas12a Dual System. Front Microbiol 2022; 13:811768. [PMID: 35633705 PMCID: PMC9136402 DOI: 10.3389/fmicb.2022.811768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 03/29/2022] [Indexed: 11/13/2022] Open
Abstract
Mycoplasma pneumoniae can cause severe respiratory tract infections and extrapulmonary diseases, which pose a significant threat to the health of children. Diagnostic methods for M. pneumoniae include isolation and culture, antibody detection, fluorescence quantitative PCR, and so on, but there are various shortcomings in time, cost, convenience, and sensitivity. In this study, we developed a rapid, sensitive, specific, and economical method for the detection of M. pneumoniae, termed the ERA/CRISPR–Cas12a dual system. The system used the high specificity and collateral cleavage activity of the LbCas12a protein, combined with enzymatic recombination amplification (ERA) technology with strong amplification ability, allowing the results to be observed by a portable fluorometer or visualized by the naked eye with a dipstick, which could be obtained in approximately 30 min. The ERA/CRISPR–Cas12a fluorescence and dipstick system were able to detect M. pneumoniae at titers as low as 1 and 100 copies/μL, respectively. The specificity of the two interpretation methods was 100%, and no cross-reaction with other pathogens was observed. In the evaluation of 92 clinical samples, the positive predictive agreements of the ERA/CRISPR–Cas12a fluorescence and dipstick systems with qPCR detection were 100% and 92.86%, respectively. The negative predictive agreements of both methods were 100%. In conclusion, this study established a portable, rapid, low-cost, ultrasensitive, and specific method for the early and rapid diagnosis of M. pneumoniae to meet the needs of on-site rapid detection in primary health institutions.
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Affiliation(s)
- Zhongliang Deng
- The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, China
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
- Hunan Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Haiyang Hu
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
- Hunan Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Dan Tang
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Jiaxin Liang
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Xiaoling Su
- The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Tingqing Jiang
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Xipan Hu
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Wanqin Ying
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Deshuai Zhen
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Xilin Xiao
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, Hengyang, China
| | - Jun He
- The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, China
- *Correspondence: Jun He,
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Dawood A, Algharib SA, Zhao G, Zhu T, Qi M, Delai K, Hao Z, Marawan MA, Shirani I, Guo A. Mycoplasmas as Host Pantropic and Specific Pathogens: Clinical Implications, Gene Transfer, Virulence Factors, and Future Perspectives. Front Cell Infect Microbiol 2022; 12:855731. [PMID: 35646746 PMCID: PMC9137434 DOI: 10.3389/fcimb.2022.855731] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 04/04/2022] [Indexed: 12/28/2022] Open
Abstract
Mycoplasmas as economically important and pantropic pathogens can cause similar clinical diseases in different hosts by eluding host defense and establishing their niches despite their limited metabolic capacities. Besides, enormous undiscovered virulence has a fundamental role in the pathogenesis of pathogenic mycoplasmas. On the other hand, they are host-specific pathogens with some highly pathogenic members that can colonize a vast number of habitats. Reshuffling mycoplasmas genetic information and evolving rapidly is a way to avoid their host's immune system. However, currently, only a few control measures exist against some mycoplasmosis which are far from satisfaction. This review aimed to provide an updated insight into the state of mycoplasmas as pathogens by summarizing and analyzing the comprehensive progress, current challenge, and future perspectives of mycoplasmas. It covers clinical implications of mycoplasmas in humans and domestic and wild animals, virulence-related factors, the process of gene transfer and its crucial prospects, the current application and future perspectives of nanotechnology for diagnosing and curing mycoplasmosis, Mycoplasma vaccination, and protective immunity. Several questions remain unanswered and are recommended to pay close attention to. The findings would be helpful to develop new strategies for basic and applied research on mycoplasmas and facilitate the control of mycoplasmosis for humans and various species of animals.
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Affiliation(s)
- Ali Dawood
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Egypt
- Hubei Hongshan Laboratory, Wuhan, China
| | - Samah Attia Algharib
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, HZAU, Wuhan, China
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Benha University, Toukh, Egypt
| | - Gang Zhao
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan, China
| | - Tingting Zhu
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan, China
| | - Mingpu Qi
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan, China
| | - Kong Delai
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Zhiyu Hao
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan, China
| | - Marawan A. Marawan
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- Infectious Diseases, Faculty of Veterinary Medicine, Benha University, Toukh, Egypt
| | - Ihsanullah Shirani
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- Para-Clinic Department, Faculty of Veterinary Medicine, Jalalabad, Afghanistan
| | - Aizhen Guo
- The State Key Laboratory of Agricultural Microbiology, (HZAU), Wuhan, China
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan, China
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Gaurivaud P, Tardy F. The Mycoplasma spp. ‘Releasome’: A New Concept for a Long-Known Phenomenon. Front Microbiol 2022; 13:853440. [PMID: 35495700 PMCID: PMC9051441 DOI: 10.3389/fmicb.2022.853440] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
The bacterial secretome comprises polypeptides expressed at the cell surface or released into the extracellular environment as well as the corresponding secretion machineries. Despite their reduced coding capacities, Mycoplasma spp. are able to produce and release several components into their environment, including polypeptides, exopolysaccharides and extracellular vesicles. Technical difficulties in purifying these elements from the complex broth media used to grow mycoplasmas have recently been overcome by optimizing growth conditions and switching to chemically defined culture media. However, the secretion pathways responsible for the release of these structurally varied elements are still poorly described in mycoplasmas. We propose the use of the term ‘releasome,’ instead of secretome, to refer to molecules released by mycoplasmas into their environment. The aim of this review is to more precisely delineate the elements that should be considered part of the mycoplasmal releasome and their role in the interplay of mycoplasmas with host cells and tissues.
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Jiang Z, Zhou R, Leung PHM, Deng Z, Li S. An attenuated multiple genetic mutant of Mycoplasma pneumoniae imparts good immuno-protection against M. pneumoniae pneumonia in BALB/c mice. Microb Pathog 2022; 165:105463. [PMID: 35240287 DOI: 10.1016/j.micpath.2022.105463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 11/19/2022]
Abstract
Mycoplasma pneumoniae (M. pneumoniae) is the causative agent of both upper and lower respiratory infections that can lead to pneumonia, extrapulmonary complications and devastating sequela. With the increasing rate of macrolide-resistant strains, the severe clinical consequence of refractory mycoplasma pneumonia in children health calls for the need of vaccine research for this pathogen. In this report, the immunomodulatory effectiveness of a live attenuated M. pneumoniae vaccine was evaluated. The vaccine strain was a mutant strain of M. pneumoniae, MUT129, obtained after multiple passages of M129 strain in PPLO broth. The SNP/InDel detection results showed that mutations were present in genes encoding the adhesion organelle-associated proteins and lipoproteins of M. pneumoniae MUT129. Upon intranasal challenge of BALB/c mice with 1 × 107 CFU of MUT129, there were very small amount of Mycoplasma antigens and almost no M. pneumoniae present in the lung tissues of BALB/c mice. Besides, there was almost no inflammatory cell infiltration in the lung tissue. Results of the M. pneumoniae challenge study showed that mice immunized with MUT129 presented with less inflammation, lower detectable number of M. pneumoniae in the lungs when compared with the unimmunized mice. These results indicated that the live attenuated vaccine can efficiently prevent the proliferation of M. pneumonia in the lungs, reduce but not completely prevent the pulmonary inflammatory response.
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Affiliation(s)
- Zhulin Jiang
- Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Runjie Zhou
- Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Polly H M Leung
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Zhongliang Deng
- Hengyang Medical College, University of South China, Hengyang, 421001, China.
| | - Shuihong Li
- Hengyang Medical College, University of South China, Hengyang, 421001, China.
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Fu YS, Duan XQ, Cheng KR, Yan-Yan-Fei, Liu L, Duan HD, Hu Q, Xia SL, Wang XR, Cheng ZF. Geraniol relieves mycoplasma pneumonia infection-induced lung injury in mice through the regulation of ERK/JNK and NF-κB signaling pathways. J Biochem Mol Toxicol 2022; 36:e22984. [PMID: 35038199 DOI: 10.1002/jbt.22984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/08/2021] [Accepted: 12/09/2021] [Indexed: 01/13/2023]
Abstract
BACKGROUND Pneumonia is a serious pediatric lung injury disease caused by Mycoplasma pneumoniae (M. pneumoniae) with increasing global prevalence every year. The WHO has reported that nearly 19% of children die due to pneumonia worldwide. OBJECTIVE The present research was conducted to discover the ameliorative properties of geraniol against M. pneumoniae-provoked pneumonia in mice through the modulation of inflammatory responses. METHODOLOGY The pneumonia was provoked in the male Swiss albino mice via infecting animals with 100 µl of M. pneumoniae for 2 days and supplemented concurrently with 20 mg/kg of geraniol for 3 days. 100 mg/kg of azithromycin was used as a standard drug. The nitric oxide (NO) level and MPO activity were measured using kits. The SOD activity, GSH, and MDA levels were studied using standard methods. The polymerase chain reaction (PCR) study was performed to examine the M. pneumoniae DNA load. The inflammatory cytokines status was assessed by assay kits. The ERK1/2, JNK1/2, and NF-κB expressions were studied by reverse-transcription (RT-PCR). The lung tissues were analyzed microscopically to investigate the histological alterations. RESULTS Geraniol treatment effectively reduced lung weight, NO level, and MPO activity in the pneumonia mice. The total cells and M. pneumoniae DNA load were also decreased by the geraniol. The SOD activity and GSH level were improved and MDA was decreased by the geraniol treatment. The IL-1, IL-6, IL-8, TNF-α, and TGF status were appreciably depleted by the geraniol in the pneumonia mice. Geraniol also suppressed the ERK1/2 and NF-κB expressions in the lung tissues. Histological findings also suggest the therapeutic roles of geraniol against pneumonia in mice. CONCLUSION In summary, our results proved the beneficial roles of geraniol against the M. pneumoniae-provoked pneumonia. Geraniol could be a hopeful therapeutic agent to treat pneumonia in the future.
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Affiliation(s)
- Yang-Shan Fu
- Department of Emergency Medicine, Affiliated Hospital of Yunnan University, Kunming, China
| | - Xue-Qiong Duan
- Department of Emergency Medicine, Affiliated Hospital of Yunnan University, Kunming, China
| | - Ke-Run Cheng
- Department of Clinical Medicine, Sichuan University School of Clinical Medicine, Chengdu, China
| | - Yan-Yan-Fei
- Department of Radiation Oncology, The third affiliated hospital of Kunming Medical University, Tumor Hospital of Yunnan Province, Kunming, China
| | - Lin Liu
- Department of Emergency Medicine, Affiliated Hospital of Yunnan University, Kunming, China
| | - Hong-Dan Duan
- Department of Emergency Medicine, Affiliated Hospital of Yunnan University, Kunming, China
| | - Qin Hu
- Emergency Department, Kunming Second People's Hospital, Kunming, China
| | - Shuang-Li Xia
- Research centre of Pharmacology and Application of Traditional Chinese Medicine, School of Chinese Materia Medica, Yunnan University of Traditional Chinese Medicine, Kunming, China
| | - Xin-Ru Wang
- Research on the Prevention and Treatment of Emergency in the Department of Internal Medicine of Traditional Chinese Medicine, the First Clinical School of Yunnan University of Traditional Chinese Medicine, Kunming, China
| | - Zhong-Feng Cheng
- Department of Emergency Medicine, Affiliated Hospital of Yunnan University, Kunming, China
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Fang W, Huang J, Wang J, Huang T, Lin D, Yin J. Blockade of interleukin-6 receptor attenuates apoptosis and modulates the inflammatory response in Mycoplasma pneumoniae infected A549 cells. Am J Transl Res 2022; 14:6187-6195. [PMID: 36247299 PMCID: PMC9556488 DOI: pmid/36247299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 07/23/2022] [Indexed: 12/09/2022]
Abstract
OBJECTIVE To investigate the effect of silencing the interleukin (IL)-6 gene on the induction of inflammation, oxidative stress and apoptosis in Mycoplasma pneumoniae (MP) infected A549 cells and its mechanism of action. METHODS IL-6 small interfering RNA (siRNA) was synthesized and transfected into A549 cells, which were divided into a blank control group, a negative control group, and an IL-6 siRNA group. The mRNA and protein expression of IL-6 and the protein expression of CyclinD1, Cleaved caspase-3, Bax, B-cell lymphoma 2 (Bcl-2), signal transducer and activator of transcription 3 (STAT3), phosphorylated STAT3 (p-STAT3), matrix metalloproteinase (MMP)-2 and MMP-9 were measured. Besides, cell viability and apoptosis were determined. Additionally, the levels of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GSH-PX), IL-1β, IL-8 and tumor necrosis factor (TNF)-α were measured. RESULTS The mRNA and protein levels of IL-6 in the IL-6 siRNA group were lower than those in the blank and negative control groups (P < 0.05). The IL-6 siRNA group had higher viability but lower apoptosis rate of A549 cells at 24 h, 48 h and 72 h than the blank and negative control groups (P < 0.05). The IL-6 siRNA group had lower protein expression levels of Cleaved caspase-3 and Bax, but higher protein expression levels of CyclinD1 and Bcl-2 than the blank and negative control groups (P < 0.05). The IL-6 siRNA group had lower levels of IL-6, IL-8, TNF-α and MDA, but higher levels of SOD and GSH-PX than the blank and negative control groups (P < 0.05). CONCLUSION Silencing the IL-6 gene can reduce the MP-induced inflammatory response and oxidative stress of A549 cells, enhance cell viability and inhibit apoptosis. Meanwhile, it was also found that STAT3 expression was inhibited after silencing IL-6 gene expression. Therefore, it is speculated that IL-6 may play a role by regulating STAT3, but its exact molecular biological mechanism still needs to be further explored.
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Affiliation(s)
- Wei Fang
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Shantou University Medical College Shantou, Guangdong Province, People's Republic of China
| | - Jingyu Huang
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Shantou University Medical College Shantou, Guangdong Province, People's Republic of China
| | - Jun Wang
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Shantou University Medical College Shantou, Guangdong Province, People's Republic of China
| | - Tengyi Huang
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Shantou University Medical College Shantou, Guangdong Province, People's Republic of China
| | - Dajia Lin
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Shantou University Medical College Shantou, Guangdong Province, People's Republic of China
| | - Jun Yin
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Shantou University Medical College Shantou, Guangdong Province, People's Republic of China
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Rüger N, Sid H, Meens J, Szostak MP, Baumgärtner W, Bexter F, Rautenschlein S. New Insights into the Host-Pathogen Interaction of Mycoplasma gallisepticum and Avian Metapneumovirus in Tracheal Organ Cultures of Chicken. Microorganisms 2021; 9:microorganisms9112407. [PMID: 34835532 PMCID: PMC8618481 DOI: 10.3390/microorganisms9112407] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/10/2021] [Accepted: 11/16/2021] [Indexed: 01/04/2023] Open
Abstract
Respiratory pathogens are a health threat for poultry. Co-infections lead to the exacerbation of clinical symptoms and lesions. Mycoplasma gallisepticum (M. gallispeticum) and Avian Metapneumovirus (AMPV) are two avian respiratory pathogens that co-circulate worldwide. The knowledge about the host-pathogen interaction of M. gallispeticum and AMPV in the chicken respiratory tract is limited. We aimed to investigate how co-infections affect the pathogenesis of the respiratory disease and whether the order of invading pathogens leads to changes in host-pathogen interaction. We used chicken tracheal organ cultures (TOC) to investigate pathogen invasion and replication, lesion development, and selected innate immune responses, such as interferon (IFN) α, inducible nitric oxide synthase (iNOS) and IFNλ mRNA expression levels. We performed mono-inoculations (AMPV or M. gallispeticum) or dual-inoculations in two orders with a 24-h interval between the first and second pathogen. Dual-inoculations compared to mono-inoculations resulted in more severe host reactions. Pre-infection with AMPV followed by M. gallispeticum resulted in prolonged viral replication, more significant innate immune responses, and lesions (p < 0.05). AMPV as the secondary pathogen impaired the bacterial attachment process. Consequently, the M. gallispeticum replication was delayed, the innate immune response was less pronounced, and lesions appeared later. Our results suggest a competing process in co-infections and offer new insights in disease processes.
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Affiliation(s)
- Nancy Rüger
- Clinic for Poultry, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (N.R.); (F.B.)
| | - Hicham Sid
- Reproductive Biotechnology, TUM School of Life Sciences Weihenstephan, Technical University of Munich, 85354 Munich, Germany;
| | - Jochen Meens
- Institute for Microbiology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Michael P. Szostak
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria;
| | - Wolfgang Baumgärtner
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Frederik Bexter
- Clinic for Poultry, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (N.R.); (F.B.)
| | - Silke Rautenschlein
- Clinic for Poultry, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (N.R.); (F.B.)
- Correspondence: ; Tel.: +49-511-953-8779
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41
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Zhang H, Li X, Wang J, Cheng Q, Shang Y, Wang G. Baicalin relieves Mycoplasma pneumoniae infection‑induced lung injury through regulating microRNA‑221 to inhibit the TLR4/NF‑κB signaling pathway. Mol Med Rep 2021; 24:571. [PMID: 34109422 PMCID: PMC8201456 DOI: 10.3892/mmr.2021.12210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 02/23/2021] [Indexed: 02/06/2023] Open
Abstract
Mycoplasma pneumoniae (MP) is a common pathogen that can cause respiratory infections. MP pneumonia (MPP) leads to numerous complications, including lung injury and even death. The present study aimed to investigate the protective effects of Baicalin treatment on MP infection‑induced lung injury and the molecular mechanism underlying these effects. Briefly, after mice were infected intranasally by MP and treated with Baicalin (80 mg/kg), serum levels of MP‑immunoglobulin M (IgM) were detected by ELISA. The expression levels of C‑reactive protein (CRP) in lung tissue were detected by immunohistochemistry and the bronchoalveolar lavage fluid (BALF) was examined by ELISA. Inflammatory factors and inflammatory cells in the BALF were assessed. The expression levels of microRNA (miR)‑221 in lung tissue were examined by reverse transcription‑quantitative PCR and pathological changes in lung tissue were detected by H&E staining. Cell apoptosis was evaluated by TUNEL assay and the protein expression levels of TLR4, MyD88 and NF‑κB were detected by western blotting. Baicalin treatment significantly reduced serum levels of MP‑IgM and CRP expression in lung tissue during MP infection. In addition, Baicalin decreased the levels of IL‑1β, IL‑6, IL‑18 and TNF‑α in the BALF, and the number of inflammatory cells. Baicalin also reduced the inflammatory infiltration in lung tissue induced by MP infection, improved the pathological changes detected in lung tissue, reduced apoptosis, and downregulated the protein expression levels of TLR4, MyD88 and NF‑κB. Furthermore, Baicalin treatment downregulated the expression of miR‑221 and the protective effects of Baicalin were attenuated by miR‑221 overexpression. In conclusion, Baicalin has a therapeutic effect on mice with MP infection‑induced lung injury, which may be related to inhibition of miR‑221 expression and regulation of the TLR4/NF‑κB signaling pathway.
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Affiliation(s)
- Han Zhang
- Department of Paediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Xiang Li
- Department of Paediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Juan Wang
- Department of Paediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Qi Cheng
- Department of Paediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Yunxiao Shang
- Department of Paediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Guizhen Wang
- Department of Microbiology and Parasitology, China Medical University, Shenyang, Liaoning 110001, P.R. China
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42
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Luo Y, Li C, Zhou Z, Gong Z, Zhu C, Lei A. Biological functions of IL-17-producing cells in mycoplasma respiratory infection. Immunology 2021; 164:223-230. [PMID: 33930194 DOI: 10.1111/imm.13346] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/07/2021] [Accepted: 04/18/2021] [Indexed: 12/17/2022] Open
Abstract
Mycoplasmas are the smallest and simplest bacteria that lack a cell wall but have the capability of self-replication. Among them, Mycoplasma pneumoniae is one of the most common causes of community-acquired pneumonia. The hallmark of mycoplasma respiratory diseases is the persistence of lung inflammation that involves both innate and adaptive immune responses. In recent years, a growing body of evidence demonstrates that IL-17 plays an important role in respiratory mycoplasma infection, and associates with the pathologic outcomes of infection, such as pneumonitis and asthma. Numerous studies have shown that a variety of cells, in particular Th17 cells, in the lung can secrete IL-17 during respiratory mycoplasma infection. In this article, we review the biological functions of distinct IL-17-producing cells in mycoplasma respiratory infection with a focus on the effect of IL-17 on the outcomes of infection.
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Affiliation(s)
- Ying Luo
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation enter for Molecular Target New Drug Study, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China.,Changsha Central Hospital, University of South China, Changsha, China
| | - Cheng Li
- Changsha Central Hospital, University of South China, Changsha, China
| | - Zhou Zhou
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation enter for Molecular Target New Drug Study, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Zhande Gong
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation enter for Molecular Target New Drug Study, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Cuiming Zhu
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation enter for Molecular Target New Drug Study, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Aihua Lei
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation enter for Molecular Target New Drug Study, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
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