1
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Jin X, Zhang C, Lin S, Gao T, Qian H, Qu L, Yao J, Du X, Feng G. Pec 1 of Pseudomonas aeruginosa Inhibits Bacterial Clearance of Host by Blocking Autophagy in Macrophages. ACS Infect Dis 2024; 10:2741-2754. [PMID: 39047963 DOI: 10.1021/acsinfecdis.4c00096] [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] [Indexed: 07/27/2024]
Abstract
Pseudomonas aeruginosa (P. aeruginosa), a common opportunistic pathogen, is highly prone to chronic infection and is almost impossible to eradicate, especially attributed to virulence factors and adaptive mutations. In the present study, pseudomonas effector candidate 1 (Pec 1), a novel virulence factor of P. aeruginosa, was investigated, which inhibited bacterial clearance by the host and aggravated lung injury. Further, it demonstrated that Pec 1 inhibited miR-155 via suppressing integrin β3 expression, thereby activating PI3K-AKT-mTOR and inhibiting autophagy in macrophages. Additionally, the identification of Pec 1 in sputum was related to the bacterial load and assisted in rapid diagnosis of P. aeruginosa infection. This finding underlined the importance of Pec 1 in the pathogenesis of P. aeruginosa infection and indicated that Pec 1 could be a vital independent virulence factor during chronic infection with P. aeruginosa, providing new insights in rapid diagnosis, therapeutic targets, and vaccine antigens of P. aeruginosa infection.
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Affiliation(s)
- Xiao Jin
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
| | - Changwen Zhang
- Department of Pulmonary and Critical Care Medicine, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
| | - Shaoqing Lin
- Department of Pulmonary and Critical Care Medicine, The 900th Hospital of the Joint Logistic Support Force, Fujian Medical University, Fuzhou, Fujian 350000, China
| | - Tianming Gao
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
| | - Huimin Qian
- Department of Acute Infectious Disease Prevention and Control, NHC Key Laboratories of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, Jiangsu 210000, China
| | - Lili Qu
- Laboratory Medicine Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
| | - Jing Yao
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
| | - Xingran Du
- Department of Pulmonary and Critical Care Medicine, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
| | - Ganzhu Feng
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210000, China
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2
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Huang FC, Huang SC. Unveiling the Novel Benefits of Co-Administering Butyrate and Active Vitamin D3 in Mice Subjected to Chemotherapy-Induced Gut-Derived Pseudomonas aeruginosa Sepsis. Biomedicines 2024; 12:1026. [PMID: 38790988 PMCID: PMC11118095 DOI: 10.3390/biomedicines12051026] [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: 03/30/2024] [Revised: 04/22/2024] [Accepted: 04/30/2024] [Indexed: 05/26/2024] Open
Abstract
Cancer patients face increased susceptibility to invasive infections, primarily due to ulcerative lesions on mucosal surfaces and immune suppression resulting from chemotherapy. Pseudomonas aeruginosa (P. aeruginosa) bacteremia is notorious for its rapid progression into fatal sepsis, posing a significant threat to cancer patients, particularly those experiencing chemotherapy-induced neutropenia. This bacterial infection contributes significantly to morbidity and mortality rates among such individuals. Our latest report showed the mutually beneficial effects of postbiotic butyrate on 1,25-dihydroxyvitamin D3 (1,25D3)-controlled innate immunity during Salmonella colitis. Hence, we investigated the impact of butyrate and 1,25D3 on chemotherapy-induced gut-derived P. aeruginosa sepsis in mice. The chemotherapy-induced gut-derived P. aeruginosa sepsis model was established through oral administration of 1 × 107 CFU of the P. aeruginosa wild-type strain PAO1 in C57BL/6 mice undergoing chemotherapy. Throughout the infection process, mice were orally administered butyrate and/or 1,25D3. Our observations revealed that the combined action of butyrate and 1,25D3 led to a reduction in the severity of colitis and the invasion of P. aeruginosa into the liver and spleen of the mice. This reduction was attributed to an enhancement in the expression of defensive cytokines and antimicrobial peptides within the cecum, coupled with decreased levels of zonulin and claudin-2 proteins in the mucosal lining. These effects were notably more pronounced when compared to treatments administered individually. This study unveils a promising alternative therapy that involves combining postbiotics and 1,25D3 for treating chemotherapy-induced gut-derived P. aeruginosa sepsis.
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Affiliation(s)
- Fu-Chen Huang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan
| | - Shun-Chen Huang
- Department of Anatomic Pathology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan;
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3
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Marzhoseyni Z, Mousavi MJ, Saffari M, Ghotloo S. Immune escape strategies of Pseudomonas aeruginosa to establish chronic infection. Cytokine 2023; 163:156135. [PMID: 36724716 DOI: 10.1016/j.cyto.2023.156135] [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: 08/08/2022] [Revised: 01/08/2023] [Accepted: 01/12/2023] [Indexed: 02/02/2023]
Abstract
The infection caused by P. aeruginosa still is dangerous throughout the world. This is partly due to its immune escape mechanisms considerably increasing the bacterial survival in the host. By escape from recognition by TLRs, interference with complement system activation, phagocytosis inhibition, production of ROS, inhibition of NET production, interference with the generation of cytokines, inflammasome inhibition, reduced antigen presentation, interference with cellular and humoral immunity, and induction of apoptotic cell death and MDSc, P. aeruginosa breaks down the barriers of the immune system and causes lethal infections in the host. Recognition of other immune escape mechanisms of P. aeruginosa may provide a basis for the future treatment of the infection. This manuscript may provide new insights and information for the development of new strategies to combat P. aeruginosa infection. In the present manuscript, the escape mechanisms of P. aeruginosa against immune response would be reviewed.
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Affiliation(s)
- Zeynab Marzhoseyni
- Department of Microbiology and Immunology, Faculty of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammad Javad Mousavi
- Department of Hematology, Faculty of Allied Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Mahmood Saffari
- Department of Microbiology and Immunology, Faculty of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Somayeh Ghotloo
- Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Kashan University of Medical Sciences, Kashan, Iran.
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4
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Yue L, Cao H, Qi J, Yuan J, Wang X, Wang Y, Shan B, Ke H, Li H, Luan N, Liu C. Pretreatment with 3-methyladenine ameliorated Pseudomonas aeruginosa-induced acute pneumonia by inhibiting cell death of neutrophils in a mouse infection model. Int J Med Microbiol 2023; 313:151574. [PMID: 36736016 DOI: 10.1016/j.ijmm.2023.151574] [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: 02/07/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 01/21/2023] Open
Abstract
Pseudomonas aeruginosa is one of the leading causes of nosocomial infections worldwide. Clinical isolates that are resistant to multiple antimicrobials make it intractable. The interactions between P. aeruginosa and host cell death have multiple effects on bacterial clearance and inflammation; however, the potential intervention effects remain to be defined. Herein, we demonstrated that intravenous administration of 3-methyladenine before, but not after, P. aeruginosa infection enhanced autophagy-independent survival, which was accompanied by a decrease in the bacterial load, alleviation of pathology and reduction in inflammatory cytokines, in an acute pneumonia mouse model. Interestingly, these beneficial effects were not dependent on neutrophil recruitment or phagocytosis, but on the enhanced killing capacity induced by inhibiting the cell death of 3-MA pretreated neutrophils. These findings demonstrate a novel protective role of 3-MA pretreatment in P. aeruginosa-induced acute pneumonia.
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Affiliation(s)
- Lei Yue
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China
| | - Han Cao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China
| | - Jialong Qi
- The First People's Hospital of Yunnan Province & Affiliated Hospital of Kunming University of Science and Technology, Kunming 650034, China
| | - Jin Yuan
- Department of Pathogen Biology and Immunology, Faculty of Basic Medical Science, Kunming Medical University, Kunming 650500, China
| | - Xin Wang
- Department of Pathogen Biology and Immunology, Faculty of Basic Medical Science, Kunming Medical University, Kunming 650500, China
| | - Yunfei Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China
| | - Bin Shan
- Department of Clinical Lab, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Huaxin Ke
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China
| | - Hua Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China
| | - Ning Luan
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China.
| | - Cunbao Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China.
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5
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Dong H, Yang W, Li W, Zhu S, Zhu L, Gao P, Hao Y. New insights into autophagy in inflammatory subtypes of asthma. Front Immunol 2023; 14:1156086. [PMID: 37090692 PMCID: PMC10117973 DOI: 10.3389/fimmu.2023.1156086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 03/27/2023] [Indexed: 04/25/2023] Open
Abstract
Asthma is a heterogeneous airway disease characterized by airway inflammation and hyperresponsiveness. Autophagy is a self-degrading process that helps maintain cellular homeostasis. Dysregulation of autophagy is involved in the pathogenesis of many diseases. In the context of asthma, autophagy has been shown to be associated with inflammation, airway remodeling, and responsiveness to drug therapy. In-depth characterization of the role of autophagy in asthma can enhance the understanding of the pathogenesis, and provide a theoretical basis for the development of new biomarkers and targeted therapy for asthma. In this article, we focus on the relationship of autophagy and asthma, and discuss its implications for asthma pathogenesis and treatment.
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Affiliation(s)
- Hongna Dong
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Wei Yang
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Wei Li
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Simin Zhu
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Ling Zhu
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Peng Gao
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, China
- *Correspondence: Peng Gao, ; Yuqiu Hao,
| | - Yuqiu Hao
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, China
- *Correspondence: Peng Gao, ; Yuqiu Hao,
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6
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Wang Y, Cao C, Zhu Y, Fan H, Liu Q, Liu Y, Chen K, Wu Y, Liang S, Li M, Li L, Liu X, Zhang Y, Wu C, Lu G, Wu M. TREM2/β-catenin attenuates NLRP3 inflammasome-mediated macrophage pyroptosis to promote bacterial clearance of pyogenic bacteria. Cell Death Dis 2022; 13:771. [PMID: 36068223 PMCID: PMC9448748 DOI: 10.1038/s41419-022-05193-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/07/2022] [Accepted: 08/15/2022] [Indexed: 01/21/2023]
Abstract
Triggering receptors expressed on myeloid cells 2 (TREM2) is considered a protective factor to protect host from bacterial infection, while how it elicits this role is unclear. In the present study, we demonstrate that deficiency of triggering receptors expressed on myeloid cells 2 (TREM2) significantly enhanced macrophage pyroptosis induced by four common pyogenic bacteria including Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus pneumoniae, and Escherichia coli. TREM2 deficiency also decreased bacterial killing ratio of macrophage, while Caspase-1 or GSDMD inhibition promoted macrophage-mediated clearance to these bacteria. Further study demonstrated that the effect of TREM2 on macrophage pyroptosis and bacterial eradication mainly dependents on the activated status of NLRP3 inflammasome. Moreover, as the key downstream of TREM2, β-catenin phosphorylated at Ser675 by TREM2 signal and accumulated in nucleus and cytoplasm. β-catenin mediated the effect of TREM2 on NLRP3 inflammasome and macrophage pyroptosis by reducing NLRP3 expression, and inhibiting inflammasome complex assembly by interacting with ASC. Collectively, TREM2/β-catenin inhibits NLRP3 inflammasome to regulate macrophage pyroptosis, and enhances macrophage-mediated pyogenic bacterial clearance.
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Affiliation(s)
- Yi Wang
- grid.411866.c0000 0000 8848 7685Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120 China
| | - Can Cao
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Yanting Zhu
- grid.411866.c0000 0000 8848 7685Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120 China
| | - Huifeng Fan
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Qiaojuan Liu
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Yiting Liu
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Kang Chen
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Yongjian Wu
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Siping Liang
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Meiyu Li
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Lexi Li
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xi Liu
- grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China
| | - Yuanqing Zhang
- grid.12981.330000 0001 2360 039XSchool of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006 China
| | - Chenglin Wu
- grid.12981.330000 0001 2360 039XOrgan Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Gen Lu
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Minhao Wu
- grid.12981.330000 0001 2360 039XProgram of Infection and Immunity, Affiliated Guangzhou Women and Children’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China ,grid.12981.330000 0001 2360 039XKey Laboratory of Tropical Diseases Control, Ministry of Education, Sun Yat-sen University, Guangzhou, 510080 China ,grid.12981.330000 0001 2360 039XGuangdong Engineering & Technology Research Center for Disease-Model Animals, Sun Yat-sen University, Guangzhou, 510006 China
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7
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Huang Y, Jia M, Yang X, Han H, Hou G, Bi L, Yang Y, Zhang R, Zhao X, Peng C, Ouyang X. Annexin A2: The Diversity of Pathological Effects in Tumorigenesis and Immune Response. Int J Cancer 2022; 151:497-509. [PMID: 35474212 DOI: 10.1002/ijc.34048] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 04/12/2022] [Accepted: 04/14/2022] [Indexed: 11/11/2022]
Abstract
Annexin A2 (ANXA2) is widely used as a marker in a variety of tumors. By regulating multiple signal pathways, ANXA2 promotes the epithelial-mesenchymal transition, which can cause tumorigenesis and accelerate thymus degeneration. The elevated ANXA2 heterotetramer facilitates the production of plasmin, which participates in pathophysiologic processes such as tumor cell invasion and metastasis, bleeding diseases, angiogenesis, inducing the expression of inflammatory factors. In addition, the ANXA2 on the cell membrane mediates immune response via its interaction with surface proteins of pathogens, C1q, toll-like receptor 2, anti-dsDNA antibodies and immunoglobulins. Nuclear ANXA2 plays a role as part of a primer recognition protein complex that enhances DNA synthesis and cells proliferation by acting on the G1-S phase of the cell. ANXA2 reduction leads to the inhibition of invasion and metastasis in multiple tumor cells, bleeding complications in acute promyelocytic leukemia, retinal angiogenesis, autoimmunity response and tumor drug resistance. In this review, we provide an update on the pathological effects of ANXA2 in both tumorigenesis and the immune response. We highlight ANXA2 as a critical protein in numerous malignancies and the immune host response.
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Affiliation(s)
- Yanjie Huang
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China.,Department of Pediatrics, The First Affiliated Hospital of Henan University of Chinese Medicine, Henan, China
| | - Mengzhen Jia
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Xiaoqing Yang
- Department of Pediatrics, The First Affiliated Hospital of Henan University of Chinese Medicine, Henan, China
| | - Hongyan Han
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Gailing Hou
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Liangliang Bi
- Department of Pediatrics, The First Affiliated Hospital of Henan University of Chinese Medicine, Henan, China
| | - Yueli Yang
- Department of Pediatrics, The First Affiliated Hospital of Henan University of Chinese Medicine, Henan, China
| | - Ruoqi Zhang
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Xueru Zhao
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Chaoqun Peng
- Department of Pediatrics, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Xinshou Ouyang
- Department of Internal Medicine, Digestive Disease Section, Yale University, New Haven, Ct, USA
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8
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Flores-Vega VR, Vargas-Roldán SY, Lezana-Fernández JL, Lascurain R, Santos-Preciado JI, Rosales-Reyes R. Bacterial Subversion of Autophagy in Cystic Fibrosis. Front Cell Infect Microbiol 2021; 11:760922. [PMID: 34692569 PMCID: PMC8531276 DOI: 10.3389/fcimb.2021.760922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 09/20/2021] [Indexed: 11/13/2022] Open
Abstract
Cystic fibrosis (CF) is a genetic disease affecting more than 70,000 people worldwide. It is caused by a mutation in the cftr gene, a chloride ion transporter localized in the plasma membrane of lung epithelial cells and other organs. The loss of CFTR function alters chloride, bicarbonate, and water transport through the plasma membrane, promoting the production of a thick and sticky mucus in which bacteria including Pseudomonas aeruginosa and Burkholderia cenocepacia can produce chronic infections that eventually decrease the lung function and increase the risk of mortality. Autophagy is a well-conserved lysosomal degradation pathway that mediates pathogen clearance and plays an important role in the control of bacterial infections. In this mini-review, we describe the principal strategies used by P. aeruginosa and B. cenocepacia to survive and avoid microbicidal mechanisms within the autophagic pathway leading to the establishment of chronic inflammatory immune responses that gradually compromise the lung function and the life of CF patients.
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Affiliation(s)
- Verónica Roxana Flores-Vega
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Escuela de Ciencias de la Salud, Universidad del Valle de México, Campus Coyoacán, Mexico City, Mexico
| | - Silvia Yalid Vargas-Roldán
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Mexico City, Mexico
| | - José Luis Lezana-Fernández
- Laboratorio de Fisiología Respiratoria y la Clínica de Fibrosis Quística, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.,Dirección Médica, Asociación Mexicana de Fibrosis Quística, Mexico City, Mexico
| | - Ricardo Lascurain
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - José Ignacio Santos-Preciado
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Roberto Rosales-Reyes
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
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9
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Li X, Wang M, Ming S, Liang Z, Zhan X, Cao C, Liang S, Liu Q, Shang Y, Lao J, Zhang S, Kuang L, Geng L, Wu Z, Wu M, Gong S, Wu Y. TARM-1 Is Critical for Macrophage Activation and Th1 Response in Mycobacterium tuberculosis Infection. THE JOURNAL OF IMMUNOLOGY 2021; 207:234-243. [PMID: 34183366 DOI: 10.4049/jimmunol.2001037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 04/29/2021] [Indexed: 12/15/2022]
Abstract
T cell-interacting activating receptor on myeloid cells 1 (TARM-1) is a novel leukocyte receptor expressed in neutrophils and macrophages. It plays an important role in proinflammatory response in acute bacterial infection, but its immunomodulatory effects on chronic Mycobacterium tuberculosis infections remain unclear. TARM-1 expression was significantly upregulated on CD14high monocytes from patients with active pulmonary tuberculosis (TB) as compared that on cells from patients with latent TB or from healthy control subjects. Small interfering RNA knockdown of TARM-1 reduced expression levels of proinflammatory cytokines IL-12, IL-18, IL-1β, and IL-8 in M. tuberculosis-infected macrophages, as well as that of HLA-DR and costimulatory molecules CD83, CD86, and CD40. Moreover, TARM-1 enhanced phagocytosis and intracellular killing of M. tuberculosis through upregulating reactive oxygen species. In an in vitro monocyte and T cell coculture system, blockade of TARM-1 activity by TARM-1 blocking peptide suppressed CD4+ T cell activation and proliferation. Finally, administration of TARM-1 blocking peptide in a mouse model of M. tuberculosis infection increased bacterial load and lung pathology, which was associated with decreased macrophage activation and IFN-γ production by T cell. Taken together, these results, to our knowledge, demonstrate a novel immune protective role of TARM-1 in M. tuberculosis infection and provide a potential therapeutic target for TB disease.
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Affiliation(s)
- Xingyu Li
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Manni Wang
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Siqi Ming
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Zibin Liang
- Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Department of Thoracic Oncology, The Cancer Center of the Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Xiaoxia Zhan
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Can Cao
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Institute of Pediatrics, Guangzhou Medical University, Guangzhou, Guangdong Province, China; and
| | - Sipin Liang
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Qiaojuan Liu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Yuqi Shang
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Juanfeng Lao
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Shunxian Zhang
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Institute of Pediatrics, Guangzhou Medical University, Guangzhou, Guangdong Province, China; and
| | - Liangjian Kuang
- Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China
| | - Lanlan Geng
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Institute of Pediatrics, Guangzhou Medical University, Guangzhou, Guangdong Province, China; and
| | - Zhilong Wu
- The Fourth People's Hospital of Foshan, Foshan, Guangdong Province, China
| | - Minhao Wu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Institute of Pediatrics, Guangzhou Medical University, Guangzhou, Guangdong Province, China; and
| | - Sitang Gong
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Institute of Pediatrics, Guangzhou Medical University, Guangzhou, Guangdong Province, China; and
| | - Yongjian Wu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center (Guangzhou), The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China; .,Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Institute of Pediatrics, Guangzhou Medical University, Guangzhou, Guangdong Province, China; and
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10
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Han L, Ma Q, Yu J, Gong Z, Ma C, Xu Y, Deng G, Wu X. Autophagy plays a protective role during Pseudomonas aeruginosa-induced apoptosis via ROS-MAPK pathway. Innate Immun 2020; 26:580-591. [PMID: 32878509 PMCID: PMC7556189 DOI: 10.1177/1753425920952156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 07/18/2020] [Accepted: 08/03/2020] [Indexed: 12/13/2022] Open
Abstract
Pseudomonas aeruginosa infection can induce alveolar macrophage apoptosis and autophagy, which play a vital role in eliminating pathogens. These two processes are usually not independent. Recently, autophagy has been found to interact with apoptosis during pathogen infections. Nevertheless, the role of autophagy in P. aeruginosa-infected cell apoptosis is unclear. In this study, we explored the impact of P. aeruginosa infection on autophagy and apoptosis in RAW264.7 cells. The autophagy activator rapamycin was used to stimulate autophagy and explore the role of autophagy on apoptosis in P. aeruginosa-infected RAW264.7 cells. The results indicated that P. aeruginosa infection induced autophagy and apoptosis in RAW264.7 cells, and that rapamycin could suppress P. aeruginosa-induced apoptosis by regulating the expression of apoptosis-related proteins. In addition, rapamycin scavenged the cellular reactive oxygen species (ROS) and diminished p-JNK, p-ERK1/2 and p-p38 expression of MAPK pathways in RAW264.7 cells infected with P. aeruginosa. In conclusion, the promotion of autophagy decreased P. aeruginosa-induced ROS accumulation and further attenuated the apoptosis of RAW264.7 cells through MAPK pathway. These results provide novel insights into host-pathogen interactions and highlight a potential role of autophagy in eliminating P. aeruginosa.
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Affiliation(s)
- Lu Han
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Qinmei Ma
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Jialin Yu
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Zhaoqian Gong
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Chenjie Ma
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Yanan Xu
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Guangcun Deng
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
| | - Xiaoling Wu
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in western China, NingXia University, NingXia, Yinchuan, China
- School of Life Science, NingXia University, NingXia, Yinchuan, China
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11
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Leuer L, Krill A, Wilkens H, Wagenpfeil G, Bischoff M, Meier C, Bals R, Tschernig T. The Phagocytosis of Blood Leukocytes from Cystic Fibrosis Patients is not Impaired in General. Lung 2019; 198:235-239. [PMID: 31707460 DOI: 10.1007/s00408-019-00290-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 10/29/2019] [Indexed: 11/30/2022]
Abstract
Impaired phagocytosis of Pseudomonas aeruginosa was found in isolated monocytes of peripheral blood of cystic fibrosis patients, but not in their neutrophils, as reported some years ago. In the present study, we analysed the phagocytic capacity of peripheral blood neutrophils and monocytes of cystic fibrosis patients and of healthy controls. Phagocytosis was determined using a commercial phagocytosis "in whole blood" assay on the basis of fluorescence-labelled opsonized Escherichia coli bacteria and flow cytometry. Venous blood of cystic fibrosis patients and of healthy controls was collected and the phagocytosis assay was performed. No differences in the percentage of phagocytic cells or in the overall phagocytic capacity were found between samples of cystic fibrosis patients and healthy controls either in monocytes or in neutrophils. Thus, our results did not support the hypothesis of a generally reduced phagocytic ability in the peripheral blood immune cells of cystic fibrosis patients.
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Affiliation(s)
- Laura Leuer
- Institute for Anatomy and Cell Biology, Saarland University, Campus Homburg, Kirrberger Strasse, Building 61, 66424, Homburg/Saar, Germany
| | - Angelika Krill
- Clinic for Pulmonology, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Heinrike Wilkens
- Clinic for Pulmonology, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Gudrun Wagenpfeil
- Institute for Medical Biometry, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Carola Meier
- Institute for Anatomy and Cell Biology, Saarland University, Campus Homburg, Kirrberger Strasse, Building 61, 66424, Homburg/Saar, Germany
| | - Robert Bals
- Clinic for Pulmonology, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Thomas Tschernig
- Institute for Anatomy and Cell Biology, Saarland University, Campus Homburg, Kirrberger Strasse, Building 61, 66424, Homburg/Saar, Germany.
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12
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Ljungberg JK, Kling JC, Tran TT, Blumenthal A. Functions of the WNT Signaling Network in Shaping Host Responses to Infection. Front Immunol 2019; 10:2521. [PMID: 31781093 PMCID: PMC6857519 DOI: 10.3389/fimmu.2019.02521] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 10/10/2019] [Indexed: 12/15/2022] Open
Abstract
It is well-established that aberrant WNT expression and signaling is associated with developmental defects, malignant transformation and carcinogenesis. More recently, WNT ligands have emerged as integral components of host responses to infection but their functions in the context of immune responses are incompletely understood. Roles in the modulation of inflammatory cytokine production, host cell intrinsic innate defense mechanisms, as well as the bridging of innate and adaptive immunity have been described. To what degree WNT responses are defined by the nature of the invading pathogen or are specific for subsets of host cells is currently not well-understood. Here we provide an overview of WNT responses during infection with phylogenetically diverse pathogens and highlight functions of WNT ligands in the host defense against infection. Detailed understanding of how the WNT network orchestrates immune cell functions will not only improve our understanding of the fundamental principles underlying complex immune response, but also help identify therapeutic opportunities or potential risks associated with the pharmacological targeting of the WNT network, as currently pursued for novel therapeutics in cancer and bone disorders.
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Affiliation(s)
- Johanna K Ljungberg
- The University of Queensland Diamantina Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Jessica C Kling
- The University of Queensland Diamantina Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Thao Thanh Tran
- The University of Queensland Diamantina Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Antje Blumenthal
- The University of Queensland Diamantina Institute, The University of Queensland, Brisbane, QLD, Australia
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13
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Hoggarth A, Weaver A, Pu Q, Huang T, Schettler J, Chen F, Yuan X, Wu M. Mechanistic research holds promise for bacterial vaccines and phage therapies for Pseudomonas aeruginosa. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:909-924. [PMID: 30936684 PMCID: PMC6431001 DOI: 10.2147/dddt.s189847] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Vaccines for Pseudomonas aeruginosa have been of longstanding interest to immunologists, bacteriologists, and clinicians, due to the widespread prevalence of hospital-acquired infection. As P. aeruginosa becomes increasingly antibiotic resistant, there is a dire need for novel treatments and preventive vaccines. Despite intense efforts, there currently remains no vaccine on the market to combat this dangerous pathogen. This article summarizes current and past vaccines under development that target various constituents of P. aeruginosa. Targeting lipopolysaccharides and O-antigens have shown some promise in preventing infection. Recombinant flagella and pili that target TLR5 have been utilized to combat P. aeruginosa by blocking its motility and adhesion. The type 3 secretion system components, such as needle-like structure PcrV or exotoxin PopB, are also potential vaccine targets. Outer membrane proteins including OprF and OprI are newer representatives of vaccine candidates. Live attenuated vaccines are a focal point in this review, and are also considered for novel vaccines. In addition, phage therapy is revived as an effective option for treating refractory infections after failure with antibiotic treatment. Many of the aforementioned vaccines act on a single target, thus lacking a broad range of protection. Recent studies have shown that mixtures of vaccines and combination approaches may significantly augment immunogenicity, thereby increasing their preventive and therapeutic potential.
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Affiliation(s)
- Austin Hoggarth
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA,
| | - Andrew Weaver
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA,
| | - Qinqin Pu
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA,
| | - Ting Huang
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA, .,Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, China
| | - Jacob Schettler
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA,
| | - Feng Chen
- Pulmonary and Allergy Institute, Affiliated Hospital of Southwestern Medical University, Luzhou, China
| | - Xiefang Yuan
- Pulmonary and Allergy Institute, Affiliated Hospital of Southwestern Medical University, Luzhou, China
| | - Min Wu
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA,
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14
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Enterococcus faecalis lipoteichoic acid regulates macrophages autophagy via PI3K/Akt/mTOR pathway. Biochem Biophys Res Commun 2018; 498:1028-1036. [PMID: 29551680 DOI: 10.1016/j.bbrc.2018.03.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 03/13/2018] [Indexed: 02/06/2023]
Abstract
Enterococcus faecalis (E. faecalis) infection is considered an important etiological factor for the development of persistent apical periodontitis (PAP), but the exact mechanisms of autophagy between E. faecalis and immune cells remain unknown. In this study, we elucidated how E. faecalis lipoteichoic acid (LTA) is associated with macrophages autophagy. We found that E. faecalis LTA apparently activated macrophage autophagy with significant increase of autophagosomes and autophagy relative protein. Meanwhile, we noticed significantly decreasing expression of p-Akt and p-mTOR. However, these effect were absent in macrophages knockdown of Beclin1. In summary, these findings suggested E. faecalis LTA may increased macrophages autophagy via inhibiting PI3K/Akt/mTOR pathway and this process was Beclin1 dependent.
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15
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Wu Y, Li D, Wang Y, Liu X, Zhang Y, Qu W, Chen K, Francisco NM, Feng L, Huang X, Wu M. Beta-Defensin 2 and 3 Promote Bacterial Clearance of Pseudomonas aeruginosa by Inhibiting Macrophage Autophagy through Downregulation of Early Growth Response Gene-1 and c-FOS. Front Immunol 2018; 9:211. [PMID: 29487594 PMCID: PMC5816924 DOI: 10.3389/fimmu.2018.00211] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 01/24/2018] [Indexed: 01/08/2023] Open
Abstract
Beta-defensins 2 and 3 (BD2 and BD3) are inducible peptides present at the sites of infection, and they are well characterized for their antimicrobial activities and immune-regulatory functions. However, no study has thoroughly investigated their immunomodulatory effects on macrophage-mediated immune responses against Pseudomonas aeruginosa (PA). Here, we use THP-1 and RAW264.7 cell lines and demonstrate that BD2 and BD3 suppressed macrophage autophagy but enhanced the engulfment of PA and Zymosan bioparticles as well as the formation of phagolysosomes, using immunofluorescence staining and confocal microscopy. Plate count assay showed that macrophage-mediated phagocytosis and intracellular killing of PA were promoted by BD2 and BD3. Furthermore, microarray and real-time PCR showed that the expression of two genes, early growth response gene-1 (EGR1) and c-FOS, was attenuated by BD2 and BD3. Western blot revealed that BD2 and BD3 inhibited the expression and nuclear translocation of EGR1 and c-FOS. Knockdown of EGR1 and c-FOS by siRNA transfection suppressed macrophage autophagy before and after PA infection; while overexpression of these two transcription factors enhanced autophagy but reversed the role of BD2 and BD3 on macrophage-mediated PA eradication. Together, these results demonstrate a novel immune defense activity of BD2 and BD3, which promotes clearance of PA by inhibiting macrophage autophagy through downregulation of EGR1 and c-FOS.
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Affiliation(s)
- Yongjian Wu
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Dandan Li
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Yi Wang
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Xi Liu
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yuanqing Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wenting Qu
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Kang Chen
- Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-sen University, Zhongshan, China
| | - Ngiambudulu M Francisco
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Lianqiang Feng
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Xi Huang
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Minhao Wu
- Program of Pathobiology and Immunology, Fifth Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Diseases Control, Sun Yat-sen University, Ministry of Education, Guangzhou, China
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16
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Fu Q, Chen K, Zhu Q, Wang W, Huang F, Miao L, Wu X. β-catenin promotes intracellular bacterial killing via suppression of Pseudomonas aeruginosa-triggered macrophage autophagy. J Int Med Res 2017; 45:556-569. [PMID: 28415949 PMCID: PMC5536651 DOI: 10.1177/0300060517692147] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Objective To investigate β-catenin-mediated bacterial elimination during Pseudomonas aeruginosa infection of macrophage-like RAW264.7 cells. Methods Cell viability and catenin beta 1 (CTNNB1) expression in RAW264.7 cells following P. aeruginosa infection versus uninfected cells, were detected by cell counting kit-8 assay and β-catenin Western blots. RAW264.7 cells with CTNNB1 overexpression were established with β-catenin lentivirus using flow cytometry and clonogenic limiting dilution assays. Bacterial killing was measured by plate counts; phagocytosis and nitric oxide (NO) were measured by flow cytometry; and reactive oxygen species (ROS) were measured using Griess reaction. Autophagy was determined by microtubule-associated protein 1 light chain 3 alpha-phosphatidylethanolamine conjugate (LC3-II) protein levels and formation of LC3 puncta, using Western blot and immunofluorescence staining. Results Following P. aeruginosa infection, RAW264.7 cell β-catenin levels were reduced in a time- and multiplicity of infection-dependent manner. CTNNB1 overexpression was associated with increased P. aeruginosa elimination, but had no effect on RAW264.7 cell phagocytosis, ROS and NO. CTNNB1 overexpression reduced LC3-II levels and formation of LC3 puncta, suggesting autophagy inhibition. Rapamycin/starvation-induced autophagy resulted in reduced bacterial killing following P. aeruginosa infection. Conclusion β-catenin may promote bacterial killing via suppression of P. aeruginosa-induced macrophage autophagy.
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Affiliation(s)
- Qiang Fu
- 1 Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China
| | - Kang Chen
- 1 Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China
| | - Qian Zhu
- 2 Institute of Quality Standard and Testing Technology for Agro-product, Shandong Academy of Agricultural Science, Jinan, China
| | - Weijia Wang
- 1 Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China
| | - Fuda Huang
- 1 Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China
| | - Lishao Miao
- 1 Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China
| | - Xinger Wu
- 1 Division of Clinical Laboratory, Zhongshan Hospital of Sun Yat-Sen University, Zhongshan, China
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