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OuYang X, Liu P, Zheng Y, Jiang H, Lv Q, Huang W, Hao H, Pian Y, Kong D, Jiang Y. TRIM32 reduced the recruitment of innate immune cells and the killing capacity of Listeria monocytogenes by inhibiting secretion of chemokines. Gut Pathog 2023; 15:32. [PMID: 37415157 DOI: 10.1186/s13099-023-00558-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/10/2023] [Indexed: 07/08/2023] Open
Abstract
Listeria monocytogenes (Lm) is a facultative, intracellular Gram-positive pathogenic bacterium that causes sepsis, a condition characterized by persistent excessive inflammation and organ dysfunction. However, the pathogenesis of Lm-induced sepsis is unknown. In this research, we discovered that TRIM32 is required for innate immune regulation during Lm infection. Trim32 deficiency remarkably reduced bacteremia and proinflammatory cytokine secretion in mice with severe Lm infection, preventing sepsis. Trim32-/- mice had a lower bacterial burden after Lm infection and survived significantly longer than wild-type (WT) mice, as well as lower serum levels of inflammatory cytokines TNF-α, IL-6, IL-18, IL-12p70, IFN-β, and IFN-γ at 1 day post infection (dpi) compared to WT mice. On the other hand, the chemokines CXCL1, CCL2, CCL7, and CCL5 were enhanced at 3 dpi in Trim32-/- mice than WT mice, reflecting increased recruitment of neutrophils and macrophages. Furthermore, Trim32-/- mice had higher levels of macrophage-associated iNOS to kill Lm. Collectively, our findings suggest that TRIM32 reduces innate immune cells recruitment and Lm killing capabilities via iNOS production.
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Affiliation(s)
- Xuan OuYang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Peng Liu
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Wenhua Huang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Huaijie Hao
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China
| | - Yaya Pian
- National Center for Clinical Laboratories, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology, Beijing, China.
| | - Decong Kong
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China.
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Beijing, China.
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Huang J, Zheng X, Kang W, Hao H, Mao Y, Zhang H, Chen Y, Tan Y, He Y, Zhao W, Yin Y. Metagenomic and metabolomic analyses reveal synergistic effects of fecal microbiota transplantation and anti-PD-1 therapy on treating colorectal cancer. Front Immunol 2022; 13:874922. [PMID: 35911731 PMCID: PMC9336524 DOI: 10.3389/fimmu.2022.874922] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 06/27/2022] [Indexed: 11/13/2022] Open
Abstract
Anti-PD-1 immunotherapy has saved numerous lives of cancer patients; however, it only exerts efficacy in 10-15% of patients with colorectal cancer. Fecal microbiota transplantation (FMT) is a potential approach to improving the efficacy of anti-PD-1 therapy, whereas the detailed mechanisms and the applicability of this combination therapy remain unclear. In this study, we evaluated the synergistic effect of FMT with anti-PD-1 in curing colorectal tumor-bearing mice using a multi-omics approach. Mice treated with the combination therapy showed superior survival rate and tumor control, compared to the mice received anti-PD-1 therapy or FMT alone. Metagenomic analysis showed that composition of gut microbiota in tumor-bearing mice treated with anti-PD-1 therapy was remarkably altered through receiving FMT. Particularly, Bacteroides genus, including FMT-increased B. thetaiotaomicron, B. fragilis, and FMT-decreased B. ovatus might contribute to the enhanced efficacy of anti-PD-1 therapy. Furthermore, metabolomic analysis upon mouse plasma revealed several potential metabolites that upregulated after FMT, including punicic acid and aspirin, might promote the response to anti-PD-1 therapy via their immunomodulatory functions. This work broadens our understanding of the mechanism by which FMT improves the efficacy of anti-PD-1 therapy, which may contribute to the development of novel microbiota-based anti-cancer therapies.
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Affiliation(s)
- Jiayuan Huang
- School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Xing Zheng
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Wanying Kang
- School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Huaijie Hao
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Yudan Mao
- School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Hua Zhang
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, Digestive Diseases Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Yuan Chen
- School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
| | - Yan Tan
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Yulong He
- School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, Digestive Diseases Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Wenjing Zhao
- School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
- *Correspondence: Yiming Yin, ; Wenjing Zhao,
| | - Yiming Yin
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
- *Correspondence: Yiming Yin, ; Wenjing Zhao,
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Huang Y, Zhu N, Zheng X, Liu Y, Lu H, Yin X, Hao H, Tan Y, Wang D, Hu H, Liang Y, Li X, Hu Z, Yin Y. Intratumor Microbiome Analysis Identifies Positive Association Between Megasphaera and Survival of Chinese Patients With Pancreatic Ductal Adenocarcinomas. Front Immunol 2022; 13:785422. [PMID: 35145519 PMCID: PMC8821101 DOI: 10.3389/fimmu.2022.785422] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 01/03/2022] [Indexed: 12/24/2022] Open
Abstract
Human tumors harbor a plethora of microbiota. It has been shown that the composition and diversity of intratumor microbiome are significantly associated with the survival of patients with pancreatic ductal adenocarcinoma (PDAC). However, the association in Chinese patients as well as the effect of different microorganisms on inhibiting tumor growth are unclear. In this study, we collected tumor samples resected from long-term and short-term PDAC survivors and performed 16S rRNA amplicon sequencing. We found that the microbiome in samples with different survival time were significantly different, and the differential bacterial composition was associated with the metabolic pathways in the tumor microenvironment. Furthermore, administration of Megasphaera, one of the differential bacteria, induced a better tumor growth inhibition effect when combined with the immune checkpoint inhibitor anti-programmed cell death-1 (anti-PD-1) treatment in mice bearing 4T1 tumor. These results indicate that specific intratumor microbiome can enhance the anti-tumor effect in the host, laying a foundation for further clarifying the underlying detailed mechanism.
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Affiliation(s)
- Yu Huang
- Department of General Surgery, No.903 Hospital of People’s Liberation Army Joint Logistic Support Forcel, Hangzhou, China
| | - Ning Zhu
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Xing Zheng
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Yanhong Liu
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Haopeng Lu
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Xiaochen Yin
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Huaijie Hao
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Yan Tan
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Dongjie Wang
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Han Hu
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Yong Liang
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
| | - Xinxing Li
- Department of General Surgery, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Zhiqian Hu
- Department of General Surgery, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Department of General Surgery, Changzheng Hospital, The Second Military Medical University, Shanghai, China
| | - Yiming Yin
- Department of Research and Development, Shenzhen Xbiome Biotech Co. Ltd., Shenzhen, China
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Gao S, Ni C, Huang W, Hao H, Jiang H, Lv Q, Zheng Y, Liu P, Kong D, Jiang Y. The interaction between flagellin and the glycosphingolipid Gb3 on host cells contributes to Bacillus cereus acute infection. Virulence 2021; 11:769-780. [PMID: 32507026 PMCID: PMC7567440 DOI: 10.1080/21505594.2020.1773077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Bacillus cereus is an opportunistic pathogen that can cause emetic or diarrheal foodborne illness. Previous studies have identified multiple pathogenic B. cereus strains and characterized a variety of virulence factors. Here, we demonstrate that the virulence and lethality of B. cereus for mammalian cells and host animals involve the interaction of B. cereus flagellin proteins and the host-cell-surface-localized glycosphingolipid Gb3 (CD77, Galα1-4Galβ1-4Glcβ1-Cer). We initially found that B. cereus infection was less lethal for Gb3-deficiencient A4galt−/- mice than for wild-type mice. Subsequent experiments established that some factor other than secreted toxins must account of the observed differential lethality: Gb3-deficiencient A4galt−/- mice were equally susceptible to secreted-virulence-factor-mediated death as WT mice, and we observed no differences in the bacterial loads of spleens or livers of mice treated with B. cereus strain vs. mice infected with a mutant variant of incapable of producing many secreted toxins. A screen for host-interacting B. cereus cell wall components identified the well-known flagellin protein, and both flagellin knockout strain assays and Gb3 inhibitor studies confirmed that flagellin does interact with Gb3 in a manner that affects B. cereus infection of host cells. Finally, we show that treatment with polyclonal antibody against flagellin can protect mice against B. cereus infection. Thus, beyond demonstrating a previously unappreciated interaction between a bacterial motor protein and a mammalian cell wall glycosphingolipid, our study will provide useful information for the development of therapies to treat infection of B. cereus.
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Affiliation(s)
- Song Gao
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Chengpei Ni
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Wenhua Huang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Huaijie Hao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences , Beijing, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Peng Liu
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Decong Kong
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
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5
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Liu YL, Zheng YM, Luo JJ, Zhang W, Gao F, Yuan Y, Hao HJ. [Distribution characteristics and correlation analysis of antibody detection value in myasthenia gravis]. Zhonghua Yi Xue Za Zhi 2019; 99:3221-3226. [PMID: 31694116 DOI: 10.3760/cma.j.issn.0376-2491.2019.41.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Objective: To determine the factors affecting distribution and magnitude of antibody detection value in myasthenia gravis (MG). Methods: A total of 406 MG patients diagnosed at Department of Neurology, Peking University First Hospital from May 2015 to November 2017 were included.All of them exhibited muscle fatigue with decreased response in repetitive nerve stimulation test. There were 200 males and 206 females whose ages ranged from 2 to 85 years old. According to clinical classification of MG recommended by Myasthenia Gravis Foundation of America (MGFA), patients assigned to class I to class V included 200,140, 46, 15 and 5 cases, respectively. There were 33 cases of thymic hyperplasia and 63 cases of thymoma confirmed by radiological or pathological findings. Quantile plots and quantile regression model were used to determine the effects of age, gender and MGFA classification, thymus disease on acetylcholine receptors (AChR)antibody, acetylcholinesterase (AChE) antibody, Titin antibody, ryanodine receptor (RyR) antibody and muscle-specific tyrosine kinase (MuSK) antibody detection values detected by enzyme-linked immunosorbent assay (ELISA). Results: MGFA classification had effects on distribution of AChR antibody level. There was a positive correlation between age and AChR antibody level(P<0.05). Negative correlation was found between age and AChE, Titin and RyR antibody level (P<0.05). No significant correlation was shown between any factors and MuSK antibody level(P≥0.05). MGFA classification had a positive correlation with AChR antibody level (P<0.05) and no correlation with other antibody levels (P>0.05). Gender and thymus disease had no correlation with any tested antibody levels (P>0.05). Conclusion: MGFA classification has significant effects on distribution of AChR antibody level. Age and MGFA classification have positive correlation with AChR antibody level.
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Affiliation(s)
- Y L Liu
- Department of Neurology, Peking University First Hospital, Beijing100034, China
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Huang W, Wang M, Hao H, Yang R, Xie J, Su J, Lin M, Cui Y, Jiang Y. Genomic epidemiological investigation of a Streptococcus suis outbreak in Guangxi, China, 2016. Infect Genet Evol 2018; 68:249-252. [PMID: 30597207 DOI: 10.1016/j.meegid.2018.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 09/16/2018] [Accepted: 12/18/2018] [Indexed: 11/18/2022]
Abstract
In June 2016, a Streptococcus suis outbreak occurred in Guangxi, China. We determined the genetic characteristics of six clinically isolated strains by serotyping, PCR, and whole-genome sequencing, performing genome epidemiology analysis on these and 961 public available S. suis genomes. We also classified the first sequence type ST665 human case. Sporadic and outbreak cases were distinguished by whole-genome sequencing and phylogenomics. This approach could help to prevent and control S. suis epidemics in Guangxi and the wider region.
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Affiliation(s)
- Wenhua Huang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Mingliu Wang
- Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning, China
| | - Huaijie Hao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Science, Beijing, China
| | - Ruifu Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Jijie Xie
- Jingxi Center for Diseases Control and Prevention, Jingxi, Guangxi, China
| | - Jinhong Su
- Hengxian Center for Diseases Control and Prevention, Hengxian, Guangxi, China
| | - Mei Lin
- Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning, China.
| | - Yujun Cui
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.
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Kong D, Chen Z, Wang J, Lv Q, Jiang H, Zheng Y, Xu M, Zhou X, Hao H, Jiang Y. Interaction of factor H-binding protein of Streptococcus suis with globotriaosylceramide promotes the development of meningitis. Virulence 2017; 8:1290-1302. [PMID: 28402705 DOI: 10.1080/21505594.2017.1317426] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Streptococcus suis is an important emerging zoonotic agent that causes acute bacterial meningitis in humans with high mortality and morbidity. Our previous work showed that factor H-binding protein (Fhb) contributed to virulence of S. suis, but the role of Fhb in the development of S. suis meningitis remained unclear. In this study, we demonstrated for the first time that Fhb contributed to the traversal of S. suis across the human blood-brain barrier by allelic-exchange mutagenesis, complementation and specific antibody blocking studies. We also showed that globotriaosylceramide (Gb3), the receptor of Fhb, was involved in this process and affected S. suis infection-induced activation of myosin light chain 2 through Rho/ROCK signaling in hCMEC/D3 cells. Using a murine model of S. suis meningitis, we further demonstrated that Gb3-deficiency prevented the mice from developing severe brain inflammation or injury. Our results demonstrate that the Fhb-Gb3 interaction plays an important role in the development of S. suis meningitis and might be a potential therapeutic target against S. suis infection.
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Affiliation(s)
- Decong Kong
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China
| | - Zhe Chen
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China.,b College of Biological Science & Technology , Shenyang Agricultural University , Shenyang , China
| | - Junping Wang
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China.,d Urumqi Ethnic Cadres' College , Urumqi , China
| | - Qingyu Lv
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China
| | - Hua Jiang
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China
| | - Yuling Zheng
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China
| | - Maokai Xu
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China
| | - Xuyu Zhou
- c CAS Key Laboratory of Pathogenic Microbiology and Immunology , Institute of Microbiology, Chinese Academy of Sciences , Beijing , China
| | - Huaijie Hao
- c CAS Key Laboratory of Pathogenic Microbiology and Immunology , Institute of Microbiology, Chinese Academy of Sciences , Beijing , China
| | - Yongqiang Jiang
- a State Key Laboratory of Pathogen and Biosecurity , Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing , China
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Zhang M, Hao HJ, Liu LP, Zhang HH, Zhou YY. [An analysis and literature review of two cases of autoimmune encephalitis with GABA B receptor antibodies]. Zhonghua Nei Ke Za Zhi 2016; 55:791-793. [PMID: 27686441 DOI: 10.3760/cma.j.issn.0578-1426.2016.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Autoimmune encephalitis with GABAB receptor antibodies has been rarely reported. Two cases of GABAB receptor antibodies encephalitis were presented here.Epilepsy was the onset symptom, followed by declined consciousness and frequent seizures. Fever was presented in the whole course of the disease. Myorhythmia of the two hands and pilomotor seizures were shown in the later course of the disease. No specificity was demonstrated in electroencephalograms and magnetic resonance imaging. Sensitive response was shown to the first-line immunotherapy.
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Affiliation(s)
- M Zhang
- Department of Neurology, Tianjin Huanhu Hospital, Tianjin 300060, China
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Meng LC, Li Y, Zhang W, Hao HJ, Gao F, Yuan Y. [Clinical and myopathological features of Jo-1 syndrome]. Zhonghua Yi Xue Za Zhi 2016; 96:2352-5. [PMID: 27524195 DOI: 10.3760/cma.j.issn.0376-2491.2016.29.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To report the clinical and myopathological features of 16 patients with Jo-1 syndrome. METHODS Sixteen patients were recruited in this study, who were diagnosed as Jo-1 syndrome in Department of Neurology of Peking University First Hospital from January, 2011 to July, 2015. The clinical data and myopathological data were analyzed. RESULTS The mean onset age was 41±14 (21-68) years old. 87.5% was female. The median duration was 9.5 months (1-192 months). The main clinical manifestations were weakness in 13 cases (81.2%), arthritis in 10 cases (62.5%), interstitial lung diseases in 8 cases (50%), dermatomyositis-like skin lesions in 5 cases (31.2%), fever in 3 cases (18.8%), Raynaud's phenomenon in 2 cases (12.5%) and mechanic's hands in 2 cases (12.5%). There were 3 cases with other connective tissue diseases and 1 case with non-Hodgkin's lymphoma. Mean serum CK was 3 054±2 058(470-5 222) U/L. All patients had anti-Jo-1antibody, combined with anti- Mi-2 antibody in 1 case, anti-Ro-52 antibody in 5 cases, and anti-nuclear antibody in 5 cases. 4/5 cases showed myopathic changes for electromyography (EMG) tests. Myopathological changes included edema, fragmentation and inflammatory infiltration in perimysium in 14 cases (87.5%), muscle atrophy in 13 cases including 7 cases(43.8%) predominantly in perifascicular field. Muscle fiber necrosis appeared in 8 cases with predominantly in perifascicular area in 4 cases (25%). Muscle fiber regeneration occurred in 11 cases with predominantly in perifascicular field in 5 cases (31.2%). CD8 positive T-lymphocytes, CD20 positive B-lymphocytes and CD68 positive macrophages infiltrated in various degrees, most of which were located in perimysium. MHC-Ⅰ were expressed on muscle fiber membranes in different degrees, including 7 cases (43.8%) predominantly in the cytoplasm of perifascicular muscle fibers. C5b-9 deposited in perifascicular muscle fiber membranes in 7 cases (43.8%) and perifascicular capillaries in 2 cases (12.5%). CONCLUSIONS The main manifestations of this group of Jo-1 syndrome are weakness, arthritis and interstitial lung diseases, and dermatomyositis-like skin lesions, fever, Raynaud's phenomenon, and mechanic's hands can also be seen. Edema, fragmentation and inflammatory infiltration in perimysium are common. Pathological changes in perifascicular fields appear in some cases.
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Affiliation(s)
- L C Meng
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
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10
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Li L, Pian Y, Chen S, Hao H, Zheng Y, Zhu L, Xu B, Liu K, Li M, Jiang H, Jiang Y. Phenol-soluble modulin α4 mediates Staphylococcus aureus-associated vascular leakage by stimulating heparin-binding protein release from neutrophils. Sci Rep 2016; 6:29373. [PMID: 27383625 PMCID: PMC4935938 DOI: 10.1038/srep29373] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/16/2016] [Indexed: 11/09/2022] Open
Abstract
Vascular leakage frequently occurs in patients with severe Staphylococcus aureus infection. However, the mechanism underlying S. aureus infection-induced vascular leakage remains unclear. Here, we identified the S. aureus virulence factor phenol-soluble modulin (PSM)α4 from the culture supernatant of strain USA300 as a stimulator of heparin-binding protein (HBP) release from polymorphonuclear neutrophils (PMNs) and demonstrated that PSMα4-induced HBP release from PMNs leads to vascular leakage. PSMα4 appeared less cytolytic than PSMα1-3 and was insensitive to lipoproteins; it significantly increased myeloperoxidase and elastase release from PMNs and cell surface CD63 expression in PMNs. PSMα4-induced HBP release required formyl peptide receptor 2 (FPR2) and phosphoinositide 3-kinase (PI3K) and depended on Ca(2+) influx and cytoskeleton rearrangement. Thus, PSMα4 may stimulate HBP release by activating FPR2 and PI3K to initiate PMN degranulation. PSMα4-induced HBP release from PMNs increased endothelial cell monolayer permeability in vitro and induced vascular leakage in mice. This novel function of PSMα4 may contribute to the pathogenesis of S. aureus and may be a potential therapeutic target.
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Affiliation(s)
- Lin Li
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Yaya Pian
- Key Laboratory of infection and immunity, Institute of Biophysics, Chinese Academy of Science, Beijing 100101, China
| | - Shaolong Chen
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Huaijie Hao
- Institution of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Li Zhu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing 100071, China
| | - Bin Xu
- National Center of Biomedical Analysis, Beijing, China
| | - Keke Liu
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Min Li
- Department of laboratory medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
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Zhang C, Hao H, Yu Y, Kong D, Chen S, Jiang H, Yuan Y, Zheng Y, Yang M, Jiang Y. Structural basis of the interaction between the meningitis pathogen Streptococcus suis adhesin Fhb and its human receptor. FEBS Lett 2016; 590:1384-92. [PMID: 27086582 DOI: 10.1002/1873-3468.12174] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/11/2016] [Accepted: 04/12/2016] [Indexed: 11/07/2022]
Abstract
The recently identified Streptococcus suis adhesin factor H-binding protein (Fhb) targets the host cellular receptor glycolipid GbO3 through its N terminus. However, it is unclear how Fhb interacts with its receptor. Here, we determined the complex structure of factor H-binding protein receptor-binding domain (Fhb RBD) with Gb2, an analog of its receptor, revealing that Gb2 binds in a pocket of the β sandwich core domain. We identified the key residues for Fhb RBD receptor binding using mutagenesis and isothermal titration calorimetry. Mutagenesis analyses indicated that Fhb binds to Gb2 mainly through hydrogen and hydrophobic interactions. Our findings provided structural insights into the Fhb-mediated host-pathogen interactions of S. suis.
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Affiliation(s)
- Chunmao Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - Huaijie Hao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - You Yu
- Key Laboratory for Protein Sciences of Ministry of Education, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Decong Kong
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - Shaolong Chen
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - Yuan Yuan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
| | - Maojun Yang
- Key Laboratory for Protein Sciences of Ministry of Education, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, China
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12
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Wang J, Kong D, Zhang S, Jiang H, Zheng Y, Zang Y, Hao H, Jiang Y. Interaction of fibrinogen and muramidase-released protein promotes the development of Streptococcus suis meningitis. Front Microbiol 2015; 6:1001. [PMID: 26441928 PMCID: PMC4585153 DOI: 10.3389/fmicb.2015.01001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 09/07/2015] [Indexed: 01/30/2023] Open
Abstract
Muramidase-released protein (MRP) is as an important virulence marker of Streptococcus suis (S. suis) serotype 2. Our previous works have shown that MRP can bind human fibrinogen (hFg); however, the function of this interaction in S. suis meningitis is not known. In this study, we found that the deletion of mrp significantly impairs the hFg-mediated adherence and traversal ability of S. suis across human cerebral microvascular endothelial cells (hCMEC/D3). Measurement of the permeability to Lucifer yellow in vitro and Evans blue extravasation in vivo show that the MRP-hFg interaction significantly increases the permeability of the blood–brain barrier (BBB). In the mouse meningitis model, wild type S. suis caused higher bacterial loads in the brain and more severe histopathological signs of meningitis than the mrp mutant at day 3 post-infection. Western blot analysis and immunofluorescence observations reveal that the MRP-hFg interaction can destroy the cell adherens junction protein p120-catenin of hCMEC/D3. These results indicate that the MRP-hFg interaction is important in the development of S. suis meningitis.
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Affiliation(s)
- Junping Wang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China ; Urumqi Ethnic Cadres' College , Urumqi, China
| | - Decong Kong
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Shengwei Zhang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Yating Zang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
| | - Huaijie Hao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences , Beijing, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China
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Bi L, Pian Y, Chen S, Ren Z, Liu P, Lv Q, Zheng Y, Zhang S, Hao H, Yuan Y, Jiang Y. Toll-like receptor 4 confers inflammatory response to Suilysin. Front Microbiol 2015; 6:644. [PMID: 26167160 PMCID: PMC4481166 DOI: 10.3389/fmicb.2015.00644] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 06/12/2015] [Indexed: 12/14/2022] Open
Abstract
Streptococcus suis serotype 2 (SS2) is an emerging human pathogen worldwide. A large outbreak occurred in the summer of 2005 in China. Serum samples from this outbreak revealed that levels of the main proinflammatory cytokines were significantly higher in patients with streptococcal toxic-shock-like syndrome (STSLS) than in patients with meningitis only. However, the mechanism underlying the cytokine storm in STSLS caused by SS2 remained unclear. In this study, we found that suilysin (SLY) is the main protein inflammatory stimulus of SS2 and that native SLY (nSLY) stimulated cytokines independently of its haemolytic ability. Interestingly, a small amount of SLY (Å Mol/L) induced strong, long-term TNF-α release from human PBMCs. We also found that nSLY stimulated TNF-α in wild-type macrophages but not in macrophages from mice that carried a spontaneous mutation in TLR4 (P712H). We demonstrated for the first time that SLY stimulates immune cells through TLR4. In addition, the Myd88 adaptor-p38-MAPK pathway was involved in this process. The present study suggested that the TLR4-dependent inflammatory responses induced by SLY in host might contribute to the STSLS caused by SS2 and that p38-MAPK could be used as a target to control the release of excess TNF-α induced by SS2.
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Affiliation(s)
- Lili Bi
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China ; Beijing Key Laboratory of Immunology Regulatory and Organ Transplantation, Basic Research Lab of Organ Transplant Institute, 309th Hospital of the People's Liberation Army Beijing, China
| | - Yaya Pian
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Shaolong Chen
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Zhiqiang Ren
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Peng Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Shengwei Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Huaijie Hao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Science Beijing, China
| | - Yuan Yuan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology Beijing, China
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Yu J, Pian Y, Ge J, Guo J, Zheng Y, Jiang H, Hao H, Yuan Y, Jiang Y, Yang M. Functional and Structural Characterization of the Antiphagocytic Properties of a Novel Transglutaminase from Streptococcus suis. J Biol Chem 2015; 290:19081-92. [PMID: 26085092 DOI: 10.1074/jbc.m115.643338] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Indexed: 12/13/2022] Open
Abstract
Streptococcus suis serotype 2 (Ss2) is an important swine and human zoonotic pathogen. In the present study, we identified a novel secreted immunogenic protein, SsTGase, containing a highly conserved eukaryotic-like transglutaminase (TGase) domain at the N terminus. We found that inactivation of SsTGase significantly reduced the virulence of Ss2 in a pig infection model and impaired its antiphagocytosis in human blood. We further solved the crystal structure of the N-terminal portion of the protein in homodimer form at 2.1 Å. Structure-based mutagenesis and biochemical studies suggested that disruption of the homodimer directly resulted in the loss of its TGase activity and antiphagocytic ability. Characterization of SsTGase as a novel virulence factor of Ss2 by acting as a TGase would be beneficial for developing new therapeutic agents against Ss2 infections.
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Affiliation(s)
- Jie Yu
- From the State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China, Key Laboratory for Protein Sciences of Ministry of Education, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China, and
| | - Yaya Pian
- From the State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China, Key Laboratory for Protein Sciences of Ministry of Education, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China, and
| | - Jingpeng Ge
- Key Laboratory for Protein Sciences of Ministry of Education, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China, and
| | - Jie Guo
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Yuling Zheng
- From the State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Hua Jiang
- From the State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Huaijie Hao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Yuan Yuan
- From the State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China,
| | - Yongqiang Jiang
- From the State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China,
| | - Maojun Yang
- Key Laboratory for Protein Sciences of Ministry of Education, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China, and
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15
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Wang J, Zhengl Y, Pian Y, Guo J, Hao H, Jiang Y. [Correlation between Type IV secretion system component VirD4 and virulence for Streptococcus suis 2]. Wei Sheng Wu Xue Bao 2015; 55:643-649. [PMID: 26259489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE In order to study the role of SS2 Type IV Secretion System VirD4 in evasion of the host innate immune killing, we constructed a knockout mutant AVirD4. Then we studied its biological activity and virulence. METHODS The two VirD4 flanking DNA sequences were amplified using genome of 05ZYH33 as template. We also amplified the Cm sequence of shuttle vector pSET1, and through overlap extension PCR we connected the three fragments together. Using suicide vector pSET4s, we constructed the recombinant gene knockout vector pSET4s::VirD4. The mutant AVirD4 was successfully constructed by allelic replacement. Virulence of mutant strain was compared with wild type strain 05ZYH33 through in vitro bactericidal assays, competitive infection and challenge experiment of CD1 mice. RESULTS Mutant strain AVirD4 was constructed successfully, its virulence attenuated compared to the wild type strain. CONCLUSION These findings indicated that Type IV Secretion System component VirD4 contributed to the virulence of S. suis with important functions in evading innate immunocyte killing.
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Lv Q, Hao H, Bi L, Zheng Y, Zhou X, Jiang Y. Suilysin remodels the cytoskeletons of human brain microvascular endothelial cells by activating RhoA and Rac1 GTPase. Protein Cell 2014; 5:261-4. [PMID: 24639279 PMCID: PMC3978165 DOI: 10.1007/s13238-014-0037-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, 100071, China
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Guo M, Li X, Zhang S, Song H, Zhang W, Shang X, Zheng Y, Jiang H, Lv Q, Jiang Y, Hao H. Real-time quantitative RT-PCR detection of circulating tumor cells from breast cancer patients. Int J Oncol 2014; 46:281-9. [PMID: 25353649 DOI: 10.3892/ijo.2014.2732] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 09/22/2014] [Indexed: 11/06/2022] Open
Abstract
Circulating tumor cells (CTCs) were recognized as novel tumor biomarker for prognostic and predictive purposes in various cancers. Various detection technologies and devices have been developed to enumerate and characterize CTCs. Most of those approaches are based on the positive enrichment strategy and immunocytological techniques. However, the sensitivity of these approaches proved to be limited in metastatic tumors and the detection of early tumor cell dissemination was problematic. In the present study, we developed a novel CTC detection method by real-time RT-PCR technique in combination of negative enrichment strategy. The developed enrichment approach could recover more than 75% of spiked breast cancer cells from peripheral blood. The detection limit of duplex real-time RT-PCR assay using KRT19 and ERBB2 as targeted genes was consistently one breast tumor cell. Moreover, CTC detection by duplex real-time RT-PCR assay had higher detection sensitivity than that by immunostaining, especially in early breast cancer. In summary, the results of the present study indicated the potential clinical utilities of CTCs identification on breast cancer by duplex real-time RT-PCR in combination with negative enrichment.
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Affiliation(s)
- Maowen Guo
- School of Pharmacy, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Xiaotian Li
- School of Pharmacy, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Shaohua Zhang
- Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Hua Song
- Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Wenhui Zhang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Xueyi Shang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Huaijie Hao
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
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Hao H, Hui W, Liu P, Lv Q, Zeng X, jiang H, Wang Y, Zheng X, Zheng Y, Li J, Zhou X, Jiang Y. Effect of licochalcone A on growth and properties of Streptococcus suis. PLoS One 2013; 8:e67728. [PMID: 23935843 PMCID: PMC3720849 DOI: 10.1371/journal.pone.0067728] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 05/21/2013] [Indexed: 01/05/2023] Open
Abstract
Streptococcus suis (S.suis) is an important emerging worldwide pig pathogen and zoonotic agent with rapid evolution of virulence and drug resistance. In this study, we wanted to investigate the effect of licochalcone A on growth and properties of Streptococcus suis. The antimicrobial activity of licochalcone A was tested by growth inhibition assay and the minimal inhibitory concentrations (MICs) also were determined. The effect of licochalcone A on S.suis biofilm formation was characterized by crystal violet staining. The effect of licochalcone A on suilysin secretion was evaluated by titration of hemolytic activity. To understand the antimicrobial effect, gene expression profile of S.suis treated by licochalcone A was analyzed by DNA microarray. Our results demonstrated that licochalcone A showed antimicrobial activity on S.suis with MICs of 4 µg/ml for S.suis serotype 2 strains and 8 µg/ml for S.suis serotype 7 strains. Biofilm formation was inhibited by 30–40% in the presence of licochalcone A (3 µg/ml) and suilysin secretion was also significantly inhibited in the presence of licochalcone A (1.5 µg/ml). The gene expression profile of S.suis in the presence of licochalcone A showed that 132 genes were differentially regulated, and we analyzed the regulated genes in the aspect of the bacterial cell cycle control. Among the deregulated genes, the genes responsible for the mass doubling was increased expression, but the genes responsible for DNA replication and cell division were inhibited the expression. So, we think the regulation of the cell cycle genes might provide a mechanistic understanding of licochalcone A mediated antimicrobial effect against S.suis.
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Affiliation(s)
- Huaijie Hao
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Wenjia Hui
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
- Department of Traditional Chinese Medicine Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Peng Liu
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Qingyu Lv
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Xiaotao Zeng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Hua jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Yanzi Wang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
- Department of Pharmacy, Jiangsu Provincial Xuzhou Pharmaceutical Vocational College, Xuzhou, China
| | - Xin Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Yuling Zheng
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Jianchun Li
- Department of Traditional Chinese Medicine Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
- * E-mail: (JL); (X. Zhou); (YJ)
| | - Xuyu Zhou
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- * E-mail: (JL); (X. Zhou); (YJ)
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
- * E-mail: (JL); (X. Zhou); (YJ)
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Ren ZQ, Zheng YL, Gan SZ, Lv QY, Hao HJ, Jiang YQ, Zong H. [Construction and activities of suilysin mutants]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2012; 28:580-582. [PMID: 22691347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM To construct the suilysin mutant without hemolytic activity and evaluate its functions. METHODS The proline in 353 site of suilysin was site-directed mutated to alanine, leucine and valine, respectively. The recombinant mutants were renaturated and purified by immobilized metal ion affinity chromatography, and the purified proteins were evaluated in the hemolytic activity and immunogenicity. RESULTS We obtained three mutants, SLY(P353A), SLY(P353L) and SLY(P353V). The SLY(P353V) mutant had non-hemolytic activity. Western blotting and animal experiments showed that SLY(P353V) mutant still had immunogenicity. CONCLUSION Suilysin mutant SLY(P353V) has no hemolytic activity but remains immunogenicity.
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Affiliation(s)
- Zhi-qiang Ren
- College of Life Science, Sichuan Normal University, Chengdu, China.
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20
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Lv QY, Chen Z, Zheng YL, Hao HJ, Jiang YQ, Lv SX. [Expression, purification and activity assay of Streptococcus suis serotype 2 cell wall protein SSU1664]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2011; 27:757-759. [PMID: 21722528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
AIM To amplify the SSU1664 gene from Streptococcus suis serotype 2 strain 05ZY, to express the gene in E.coli, and to evaluate the activities of the recombinant protein. METHODS SSU1664 gene was amplified by PCR using primers according to 05ZY genome sequences and cloned into the expression vector. The recombinant protein was purified by affinity chromatography and its immunogen activities were tested by Western blot and ELISA. RESULTS SSU1664 gene could solublely express in E.coli BL21(DE3). Western blot analysis showed that the recombinant protein could react with rat serum immunized with Streptococcus suis, but not with non-immunized rat serum. ELISA assay showed that anti-SSU1664 IgM content in Streptococcus suis-infected patient was significantly higher than that in healthy donors. CONCLUSION The recombinant SSU1664 protein has immunogen activity and might be one promising Streptococcus suis vaccine candidate and diagnosis marker of Streptococcus suis early infection.
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Affiliation(s)
- Qing-yu Lv
- College of Biological Science & Technology, Shenyang Agricultural University, Shenyang, China.
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21
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Lv QY, Hao HJ, Bi LL, Zheng YL, Jiang YQ, Lv SX. [Purification and biological activities analysis of streptococcus suis Serotype 2 suilysin]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2011; 27:374-376. [PMID: 21481309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To explore the purification methods of wild-type and recombinant suilysin and to evaluate their biological activities. METHODS Wild-type suilysin was purified by ammonium sulfate precipitation, anion-exchange chromatography and hydrophobic chromatography in turn, while recombinant suilysin was first refolded and purified by immobilized metal ion affinity chromatography, and further purified by Thiopropyl Sepharose 6B. The biological activities were evaluated by hemolysis test, cytotoxicity assay. RESULTS Both prepared wild-type and recombinant suilysin, with purify over 90%, have hemolysis activity and could injure target cells at high concentration while cholesterol could completely inhibit their activities. CONCLUSION Recombinant suilysin has similar biological activities with wild-type suilysin, and this work contributed to further study the functions of suilysin on pathogenesis of steptococcus suis.
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Affiliation(s)
- Qing-yu Lv
- College of Biological Science & Technology, Shenyang Agricultural University, Shenyang 11086, China.
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Hao HJ, Zheng YL, Yu DW, Ma R, Jiang YQ. [Expression, purification, and characterization of single-chain disulfide-bond Fv (ScdsFv) antibody fused with targeted superantigen SEA (D227A)]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2005; 21:269-72. [PMID: 15862136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
AIM To express, purify, and characterize scdsFv antibody fused with superantigen SEA(D227A). METHODS The expression plasmid of scdsFv-SEA(D227A) was constructed by standard molecular cloning procedures. The recombinant protein was induced to express in E. coli BL21plusS by IPTG and purified by Q Sepharose HP column and Hiprep 26/60 Sephacryl S-200 HR column. Formation of the intramolecular disulfide bond of the purified protein was analysed by AMS alkylation and PAGE electrophoresis. The binding activity, stability and killing activity of the purified protein were assayed by ELISA and MTS, respectively. RESULTS The recombinant protein was expressed as inclusion body, accounting for more than 30% of total bacterial protein. After purification by Q Sepharose HP and Hiprep 26/60 Sephacryl S-200 HR, the yield of the purified protein was 60 mg per liter of induced culture. AMS alkylation and PAGE electrophoresis analysis showed that intramolecular disulfide bond formed correctly in the recombinant protein. The purified protein had similar binding affinity as dsFv fused SEA and scFv fused SEA have and similar killing activity as native SEA has to human hepatoma cell line, but more stable, in vitro, as compared with dsFv fused SEA and scFv fused with SEA. CONCLUSION The scdsFv fused with SEA, as a novel form of immunotoxin, might be used in cancer treatment.
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Affiliation(s)
- Huai-jie Hao
- Department of Molecular Biology, College of Life Science, Nanjing Normal University, Nanjing 210097, China
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Chen SS, Lee SF, Hao HJ, Chuang CK. Mutations in the leucine zipper-like heptad repeat sequence of human immunodeficiency virus type 1 gp41 dominantly interfere with wild-type virus infectivity. J Virol 1998; 72:4765-74. [PMID: 9573241 PMCID: PMC110011 DOI: 10.1128/jvi.72.6.4765-4774.1998] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
It has been previously shown that a proline substitution for any of the conserved leucine or isoleucine residues located in the leucine zipper-like heptad repeat sequence of human immunodeficiency virus type 1 (HIV-1) gp41 renders viruses noninfectious and envelope (Env) protein unable to mediate membrane fusion (S. S.-L. Chen, C.-N. Lee, W.-R. Lee, K. McIntosh, and T.-M. Lee, J. Virol. 67:3615-3619, 1993; S. S.-L. Chen, J. Virol. 68:2002-2010, 1994). To understand whether these variants could act as trans-dominant inhibitory mutants, the ability of these mutants to inhibit wild-type (wt) virus infectivity was examined. Comparable amounts of cell- and virion-associated gag gene products as well as virion-associated gp41 were found in transfection with wt or mutant HIV-1 provirus. Viruses obtained from coexpression of wt provirus with mutant 566 or 580 provirus inhibited more potently the production of infectious virus than did viruses generated from cotransfection of wt provirus with other mutant proviruses. Nevertheless, all viruses produced from mixed transfection showed decreased infectivity compared with that of the wt virus when a multinuclear-activation beta-galactosidase induction assay was performed. The ability of wt Env to induce cytopathic effects was inhibited by coexpression with mutant Env. Coexpression of mutants inhibited the ability of the wt protein to mediate virus-to-cell transmission, as demonstrated by an env trans-complementation assay with a defective HIV-1 proviral vector. These observations indicated that mutant Env, per se, interferes with wt Env function. Moreover, cotransfection of wt and mutant proviruses produced amounts of cell- and virion-associated gag gene products comparable to those produced by transfection of wt provirus. Similar amounts of gp41 were also found in virions generated from wt-mutant cotransfection as well as from wt transfection alone. These results indicated that the inhibitory effect conferred by mutants on the wt virus infectivity does not involve the late steps of Gag protein assembly and budding, but they suggest that the wt and mutant Env proteins form a dysfunctional hetero-oligomer which is impaired in an early step of the virus replication cycle. Our study demonstrates that mutations in the HIV-1 gp41 leucine zipper-like heptad repeat sequence dominantly inhibit infectious virus production.
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Affiliation(s)
- S S Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, Republic of China.
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Yuan JM, Tang J, Chen QT, Xiao L, Hao HJ, Jia ZD, Huang QH, Liu XZ. Guillain-Barre syndrome and Campylobacter jejuni infection. A study on the etiological characteristics of Guillain-Barre syndrome in China. Chin Med J (Engl) 1993; 106:845-7. [PMID: 8143497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Fecal culture for Campylobacter jejuni with the method of Skirrow and serum class specific antibodies (IgG, IgM, IgA) against Campylobacter jejuni using a solid phase enzyme linked immunosorbent assay were performed in 17 cases of Guillain-Barre Syndrome, 17 other neurological disease controls, and 33 normal controls. The results revealed: 1. the incidence of Campylobacter jejuni infection, especially the recent one in Guillain-Barre Syndrome was much higher than in the other two groups; 2. the recent incidence of infection in those below 30 years old and those within the period of summer and autumn was higher than that above 30 years old and that in the other seasons. The results suggested that Campylobacter jejuni infection might be one of the important precipitating factors of Guillain-Barre syndrome and might play an important role in the epidemiological pattern of Guillain-Barre Syndrome in China.
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Affiliation(s)
- J M Yuan
- Department of Neurology, First Hospital, Beijing Medical University
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Yuan JM, Tang J, Hao HJ. [Five cases of Campylobacter jejuni enteritis accompanied with Guillain-Barré syndrome]. Zhonghua Nei Ke Za Zhi 1993; 32:375-7. [PMID: 8269767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
17 cases of Guillain-Barré syndrome (GBS) were admitted to The First Hospital of Beijing Medical University and Baoding Hospital from July, 1991 to October, 1992. Five patients had diarrhea before the onset of GBS and showed positive reaction for serum IgM antibodies to Campylobacter jejuni. They were considered to have Campylobacter jejuni enteritis as well. This incidence of Campylobacter jejuni enteritis in GBS patients was higher than in those with other neurological diseases and in normal controls. These five patients were all from countryside and had their onset in the summer and autumn. Moreover, four of them were below twenty-four years old. The epidemiological pattern was quite similar to that of Campylobacter jejuni enteritis in China. Our data showed the close association between GBS and Campylobacter jejuni enteritis and the possible mechanism was discussed.
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Affiliation(s)
- J M Yuan
- Department of Neurology, First Hospital, Beijing Medical University
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