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Chen L, Huang Q, Luo Y, Zhou Y, Tong T, Chen Y, Bai Q, Lu C, Li Z. MiR-184 targeting FOXO1 regulates host-cell oxidative stress induced by Chlamydia psittaci via the Wnt/β-catenin signaling pathway. Infect Immun 2023; 91:e0033723. [PMID: 37815369 PMCID: PMC10652854 DOI: 10.1128/iai.00337-23] [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: 08/25/2023] [Accepted: 08/25/2023] [Indexed: 10/11/2023] Open
Abstract
Chlamydia psittaci is a human pathogen that causes atypical pneumonia after zoonotic transmission. We confirmed that C. psittaci infection induces oxidative stress in human bronchial epithelial (HBEs) cells and explored how this is regulated through miR-184 and the Wnt/β-catenin signaling pathway. miR-184 mimic, miR-184 inhibitor, FOXO1 siRNA, or negative control sequence was transfected into HBE cells cultured in serum-free medium using Lipofectamine 2000. Then, prior to the cells were infected with C. psittaci 6BC, and the cells were treated with or without 30 µM Wnt/β-catenin inhibitor ICG-001. Quantification of reactive oxygen species, malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione was carried out according to the manufacturer's protocol using a corresponding assay kit. The outcome of both protein and gene was measured by western blotting or real-time fluorescence quantitative PCR. In C. psittaci-infected HBE cells, miR-184 was upregulated, while one of its target genes, FOXO1, was downregulated. ROS and MDA levels increased, while SOD and GSH contents decreased after C. psittaci infection. When miR-184 expression was downregulated, the level of oxidative stress caused by C. psittaci infection was reduced, and the Wnt/β-catenin signaling pathway was inhibited. The opposite results were seen when miR-184 mimic was used. Transfecting with FOXO1 siRNA reversed the effect of miR-184 inhibitor. Moreover, when the Wnt/β-catenin-specific inhibitor ICG-001 was used, the level of oxidative stress induced by C. psittaci infection was significantly suppressed. miR-184 can target FOXO1 to promote oxidative stress in HBE cells following C. psittaci infection by activation of the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Lili Chen
- Department of public health laboratory sciences, School of public health, Hengyang Medical School, University of South China, Hengyang, China
| | - Qiaoling Huang
- Department of public health laboratory sciences, School of public health, Hengyang Medical School, University of South China, Hengyang, China
| | - Yuchen Luo
- Department of public health laboratory sciences, School of public health, Hengyang Medical School, University of South China, Hengyang, China
| | - You Zhou
- Department of public health laboratory sciences, School of public health, Hengyang Medical School, University of South China, Hengyang, China
| | - Ting Tong
- Department of public health laboratory sciences, School of public health, Hengyang Medical School, University of South China, Hengyang, China
| | - Yuyu Chen
- Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Qinqin Bai
- Department of public health laboratory sciences, School of public health, Hengyang Medical School, University of South China, Hengyang, China
| | - Chunxue Lu
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, China
| | - Zhongyu Li
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, China
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Lu H, Yuan J, Wu Z, Wang L, Wu S, Chen Q, Zhang Z, Chen Z, Zou X, Hu Q, Feng T, Lu J, Ji L, Qiu S, Xu S, Jiang M, Li Y, Peng B, Bai Q, Cai R, Geng Y, Shi X. Distribution of drug-resistant genes in alveolar lavage fluid from patients with psittacosis and traceability analysis of causative organisms. Front Microbiol 2023; 14:1182604. [PMID: 37425996 PMCID: PMC10327639 DOI: 10.3389/fmicb.2023.1182604] [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: 03/09/2023] [Accepted: 06/01/2023] [Indexed: 07/11/2023] Open
Abstract
Background Chlamydia psittaci is a small bacterium often found in birds, including poultry, and domesticated mammals, which causes psittacosis (or parrot fever) in humans. Different strains of C. psittaci respond variably to antibiotics, suggesting a possible risk of antibiotic resistance. In general, different genotypes of C. psittaci have relatively stable hosts and different pathogenicity. Methods Macrogenomic sequencing was performed using nucleic acids extracted from psittacosis patients' alveolar lavage fluid samples and analyzed for genetic variability and antibiotic resistance genes. Nucleic acid amplification sequences specific to the core coding region of the C. psittaci ompA gene were used, and a phylogenetic tree was constructed with C. psittaci genotypic sequences from other sources, including Chinese published sources. The C. psittaci found in each patient were genotyped by comparing ompA gene sequences. In addition, to better illustrate the relationship between genotype and host of C. psittaci, 60 bird fecal samples were collected from bird-selling stores for screening and C. psittaci typing. Results Macrogenomic sequence alignment revealed the presence of resistance genes in varying abundance in samples from all three patients, including C. psittaci resistance gene sequences from two patients that matched those previously published on NCBI. Based on ompA genotyping, two patients were infected with C. psittaci genotype A and one patient was infected with genotype B. All five C. psittaci-positive samples obtained from bird-selling stores were genotype A. Both genotypes are reported to be infectious to humans. The host origin of the samples and the previously reported main sources of each genotype suggested that all but one of the C. psittaci genotype A in this study were derived from parrots, while genotype B was probably derived from chickens. Conclusion The presence of bacterial resistance genes in psittacosis patients may affect the efficacy of clinical antibiotic therapy. Focusing on the developmental progression of bacterial resistance genes and differences in the therapeutic efficacy may facilitate effective treatment of clinical bacterial infections. Pathogenicity genotypes (e.g., genotype A and genotype B) are not limited to one animal host, suggesting that monitoring the development and changes of C. psittaci may help prevent transmission to humans.
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Affiliation(s)
- Huiqun Lu
- Department of Public Health Laboratory Sciences, School of Public Health, University of South China, Hengyang, China
| | - Jing Yuan
- Shenzhen Third People’s Hospital, Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China
| | - Zeming Wu
- Shenzhen Hospital of Guangzhou University of Chinese Medicine (Futian), Shenzhen, China
| | | | - Shuang Wu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Qiongcheng Chen
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Zhen Zhang
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Zhigao Chen
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Xuan Zou
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Qinghua Hu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Tiejian Feng
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Jianhua Lu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Liyin Ji
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Shuxiang Qiu
- Department of Public Health Laboratory Sciences, School of Public Health, University of South China, Hengyang, China
| | - Shiqin Xu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Min Jiang
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Yinghui Li
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Bo Peng
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Qinqin Bai
- Department of Public Health Laboratory Sciences, School of Public Health, University of South China, Hengyang, China
| | - Rui Cai
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Yijie Geng
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Xiaolu Shi
- Department of Public Health Laboratory Sciences, School of Public Health, University of South China, Hengyang, China
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
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Riffaud CM, Rucks EA, Ouellette SP. Persistence of obligate intracellular pathogens: alternative strategies to overcome host-specific stresses. Front Cell Infect Microbiol 2023; 13:1185571. [PMID: 37284502 PMCID: PMC10239878 DOI: 10.3389/fcimb.2023.1185571] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 05/05/2023] [Indexed: 06/08/2023] Open
Abstract
In adapting to the intracellular niche, obligate intracellular bacteria usually undergo a reduction of genome size by eliminating genes not needed for intracellular survival. These losses can include, for example, genes involved in nutrient anabolic pathways or in stress response. Living inside a host cell offers a stable environment where intracellular bacteria can limit their exposure to extracellular effectors of the immune system and modulate or outright inhibit intracellular defense mechanisms. However, highlighting an area of vulnerability, these pathogens are dependent on the host cell for nutrients and are very sensitive to conditions that limit nutrient availability. Persistence is a common response shared by evolutionarily divergent bacteria to survive adverse conditions like nutrient deprivation. Development of persistence usually compromises successful antibiotic therapy of bacterial infections and is associated with chronic infections and long-term sequelae for the patients. During persistence, obligate intracellular pathogens are viable but not growing inside their host cell. They can survive for a long period of time such that, when the inducing stress is removed, reactivation of their growth cycles resumes. Given their reduced coding capacity, intracellular bacteria have adapted different response mechanisms. This review gives an overview of the strategies used by the obligate intracellular bacteria, where known, which, unlike model organisms such as E. coli, often lack toxin-antitoxin systems and the stringent response that have been linked to a persister phenotype and amino acid starvation states, respectively.
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He Z, Wang C, Wang J, Zheng K, Ding N, Yu M, Li W, Tang Y, Li Y, Xiao J, Liang M, Wu Y. Chlamydia psittaci inhibits apoptosis of human neutrophils by activating P2X7 receptor expression. Int J Med Microbiol 2022; 312:151571. [PMID: 36511277 DOI: 10.1016/j.ijmm.2022.151571] [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: 03/15/2022] [Revised: 09/10/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
This study tested the hypothesis that Chlamydia psittaci (C. psittaci) survives and multiplies in human neutrophils by activating P2X7, a nonselective cationic channel receptor expressed constitutively on the surface of these cells. Findings illustrated that P2X7 receptor expression was enhanced in C. psittaci-infected neutrophils. C. psittaci was able to inhibite spontaneous apoptosis of neutrophils through mitochondrial-induced ATP release and IL-8 production. Importantly, inhibiting ATP activation of the P2X7 receptor with AZ10606120 promotes apoptosis, while stimulating P2X7 receptor expression with BzATP delayed spontaneous apoptosis of human neutrophils, suggesting that C. psittaci inhibits apoptosis of human neutrophils by activating P2X7 receptor. This study reveals new insights into the survival advantages of the latent persistent state of C. psittaci and the mechanism by which it evades the innate immune response.
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Affiliation(s)
- Zhangping He
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Chuan Wang
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Jianye Wang
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Kang Zheng
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Nan Ding
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Maoying Yu
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Weiwei Li
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Yuanyuan Tang
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Yumeng Li
- The First Affiliated Hospital, Hengyang Medical School, University of South China, Hunan, China
| | - Jian Xiao
- The Affiliated Nanhua Hospital, Department of laboratory medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Mingxing Liang
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Yimou Wu
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, China; Department of Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China.
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Zhang Z, Wang P, Ma C, Wang J, Li W, Quan C, Cao H, Guo H, Wang L, Yan C, Carr MJ, Meng L, Shi W. Host inflammatory response is the major factor in the progression of Chlamydia psittaci pneumonia. Front Immunol 2022; 13:929213. [PMID: 36119044 PMCID: PMC9478202 DOI: 10.3389/fimmu.2022.929213] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
PurposeChlamydia psittaci (C. psittaci) has caused sporadic, but recurring, fatal community-acquired pneumonia outbreaks worldwide, posing a serious threat to public health. Our understanding of host inflammatory responses to C. psittaci is limited, and many bronchitis cases of psittaci have rapidly progressed to pneumonia with deterioration.MethodsTo clarify the host inflammatory response in psittacosis, we analyzed clinical parameters, and compared transcriptomic data, concentrations of plasma cytokines/chemokines, and changes of immune cell populations in 17 laboratory-confirmed psittacosis cases, namely, 8 pneumonia and 9 bronchitis individuals, in order to assess transcriptomic profiles and pro-inflammatory responses.ResultsPsittacosis cases with pneumonia were found to have abnormal routine blood indices, liver damage, and unilateral pulmonary high-attenuation consolidation. Transcriptome sequencing revealed markedly elevated expression of several pro-inflammatory genes, especially interleukins and chemokines. A multiplex-biometric immunoassay showed that pneumonia cases had higher levels of serum cytokines (G-CSF, IL-2, IL-6, IL-10, IL-18, IP-10, MCP-3, and TNF-α) than bronchitis cases. Increases in activated neutrophils and decreases in the number of lymphocytes were also observed in pneumonia cases.ConclusionWe identified a number of plasma biomarkers distinct to C. psittaci pneumonia and a variety of cytokines elevated with immunopathogenic potential likely inducing an inflammatory milieu and acceleration of the disease progression of psittaci pneumonia. This enhances our understanding of inflammatory responses and changes in vascular endothelial markers in psittacosis with heterogeneous symptoms and should prove helpful for developing both preventative and therapeutic strategies.
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Affiliation(s)
- Zhenjie Zhang
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Peihan Wang
- Beijing Institute of Genomics, Chinese Academy of Sciences, China National Center for Bioinformation, Beijing, China
| | - Chuanmin Ma
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Jing Wang
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Wenxin Li
- Department of Respiratory and Critical Care Medicine, Affiliated Hospital of Jining Medical University, Jining, China
| | - Chuansong Quan
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Huae Cao
- Department of Infectious Disease, Xintai Third People’s Hospital, Xintai, China
| | - Hongfeng Guo
- Department of Infectious Disease, Xintai Third People’s Hospital, Xintai, China
| | - Liang Wang
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Chengxin Yan
- Department of Medical Imaging, The Second Affiliated Hospital of Shandong First Medical University, Taian, China
| | - Michael J. Carr
- National Virus Reference Laboratory, School of Medicine, University College Dublin, Dublin, Ireland
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Ling Meng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian, China
- *Correspondence: Weifeng Shi, ; Ling Meng,
| | - Weifeng Shi
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- *Correspondence: Weifeng Shi, ; Ling Meng,
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