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Cao X, Gu L, Gao Z, Fan W, Zhang Q, Sheng J, Zhang Y, Sun Y. Pathogenicity and Genomic Characteristics Analysis of Pasteurella multocida Serotype A Isolated from Argali Hybrid Sheep. Microorganisms 2024; 12:1072. [PMID: 38930454 PMCID: PMC11205410 DOI: 10.3390/microorganisms12061072] [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: 04/24/2024] [Revised: 05/22/2024] [Accepted: 05/22/2024] [Indexed: 06/28/2024] Open
Abstract
Respiratory diseases arising from co-infections involving Pasteurella multocida (P. multocida) and Mycoplasma ovipneumoniae (Mo) pose a substantial threat to the sheep industry. This study focuses on the isolation and identification of the P. multocida strain extracted from the lung tissue of an argali hybrid sheep infected with Mo. Kunming mice were used as a model to assess the pathogenicity of P. multocida. Subsequently, whole genome sequencing (WGS) of P. multocida was conducted using the Illumina NovaSeq PE150 platform. The whole genome sequencing analysis involved the construction of an evolutionary tree to depict conserved genes and the generation of a genome circle diagram. P. multocida, identified as serotype A, was named P. multocida SHZ01. Our findings reveal that P. multocida SHZ01 infection induces pathological manifestations, including hemorrhage and edema, in mice. The phylogenetic tree of conserved genes analyzing P. multocida from different countries and different host sources indicates close relatedness between the P. multocida SHZ01 strain and the P. multocida 40540 strain (A:12), originating from turkeys in Denmark. The genome of P. multocida SHZ01 comprises 2,378,508 base pairs (bp) with a GC content of 40.89%. Notably, this strain, designated P. multocida, exhibits two distinct gene islands and harbors a total of 80 effector proteins associated with the Type III Secretion System (T3SS). The P. multocida SHZ01 strain harbors 82 virulence genes and 54 resistance genes. In the P. multocida SHZ01 strain, the proteins, genes, and related GO and KEGG pathways have been annotated. Exploring the relationship between these annotations and the pathogenicity of the P. multocida SHZ01 strain would be valuable. This study holds great significance in further understanding the pathogenesis and genetic characteristics of the sheep-derived P. multocida SHZ01 strain. Additionally, it contributes to our understanding of respiratory diseases in the context of co-infection.
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Affiliation(s)
| | | | | | | | | | | | - Yanbing Zhang
- College of Animal Science and Technology, Shihezi University, Shihezi 832003, China; (X.C.); (L.G.); (Z.G.); (W.F.); (Q.Z.); (J.S.)
| | - Yanming Sun
- College of Animal Science and Technology, Shihezi University, Shihezi 832003, China; (X.C.); (L.G.); (Z.G.); (W.F.); (Q.Z.); (J.S.)
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Choi M, Shridhar S, Fox H, Luo K, Amin MN, Tennant SM, Simon R, Cross AS. The O-glycan is essential for the induction of protective antibodies against lethal infection by flagella A-bearing Pseudomonas aeruginosa. Infect Immun 2024; 92:e0042723. [PMID: 38391207 DOI: 10.1128/iai.00427-23] [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: 10/24/2023] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
To address the problem of increased antimicrobial resistance, we developed a glycoconjugate vaccine comprised of O-polysaccharides (OPS) of the four most prevalent serotypes of Klebsiella pneumoniae (KP) linked to recombinant flagellin types A and B (rFlaA and rFlaB) of Pseudomonas aeruginosa (PA). Flagellin is the major subunit of the flagellar filament. Flagella A and B, essential virulence factors for PA, are glycosylated with different glycans. We previously reported that while both rFlaA and rFlaB were highly immunogenic, only the rFlaB antisera reduced PA motility and protected mice from lethal PA infection in a mouse model of thermal injury. Since recombinant flagellin is not glycosylated, we examined the possibility that the glycan on native FlaA (nFlaA) might be critical to functional immune responses. We compared the ability of nFlaA to that of native, deglycosylated FlaA (dnFlaA) to induce functionally active antisera. O glycan was removed from nFlaA with trifluoromethanesulfonic acid. Despite the similar high-titered anti-FlaA antibody levels elicited by nFlaA, rFlaA, and dnFlaA, only the nFlaA antisera inhibited PA motility and protected mice following lethal intraperitoneal bacterial challenge. Both the protective efficacy and carrier protein function of nFlaA were retained when conjugated to KP O1 OPS. We conclude that unlike the case with FlaB O glycan, the FlaA glycan is an important epitope for the induction of functionally active anti-FlaA antibodies.
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Affiliation(s)
- Myeongjin Choi
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Korea Institute of Toxicology, Daejeon, Republic of Korea
| | - Surekha Shridhar
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Heather Fox
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Kun Luo
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Mohammed N Amin
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Sharon M Tennant
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Raphael Simon
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Alan S Cross
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Lim JS, Jeon EJ, Go HS, Kim HJ, Kim KY, Nguyen TQT, Lee DY, Kim KS, Pietrocola F, Hong SH, Lee SE, Kim KS, Park TS, Choi DH, Jeong YJ, Park JH, Kim HS, Min JJ, Kim YS, Park JT, Cho JH, Lee GW, Lee JH, Choy HE, Park SC, Lee CH, Rhee JH, Serrano M, Cho KA. Mucosal TLR5 activation controls healthspan and longevity. Nat Commun 2024; 15:46. [PMID: 38167804 PMCID: PMC10761998 DOI: 10.1038/s41467-023-44263-2] [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: 02/26/2020] [Accepted: 12/06/2023] [Indexed: 01/05/2024] Open
Abstract
Addressing age-related immunological defects through therapeutic interventions is essential for healthy aging, as the immune system plays a crucial role in controlling infections, malignancies, and in supporting tissue homeostasis and repair. In our study, we show that stimulating toll-like receptor 5 (TLR5) via mucosal delivery of a flagellin-containing fusion protein effectively extends the lifespan and enhances the healthspan of mice of both sexes. This enhancement in healthspan is evidenced by diminished hair loss and ocular lens opacity, increased bone mineral density, improved stem cell activity, delayed thymic involution, heightened cognitive capacity, and the prevention of pulmonary lung fibrosis. Additionally, this fusion protein boosts intestinal mucosal integrity by augmenting the surface expression of TLR5 in a certain subset of dendritic cells and increasing interleukin-22 (IL-22) secretion. In this work, we present observations that underscore the benefits of TLR5-dependent stimulation in the mucosal compartment, suggesting a viable strategy for enhancing longevity and healthspan.
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Affiliation(s)
- Jae Sung Lim
- Department of Biochemistry, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Eun Jae Jeon
- MediSpan, Inc, Bundang-gu, Gyeonggi-do, 13486, Republic of Korea
| | - Hye Sun Go
- MediSpan, Inc, Bundang-gu, Gyeonggi-do, 13486, Republic of Korea
| | - Hyung-Jin Kim
- MediSpan, Inc, Bundang-gu, Gyeonggi-do, 13486, Republic of Korea
| | - Kye Young Kim
- MediSpan, Inc, Bundang-gu, Gyeonggi-do, 13486, Republic of Korea
| | - Thi Quynh Trang Nguyen
- Department of Biochemistry, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
- Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Da Young Lee
- Department of Biochemistry, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
- Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Kyu Suk Kim
- Department of Biochemistry, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Federico Pietrocola
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST), Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| | - Seol Hee Hong
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Shee Eun Lee
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Kyoung-Shim Kim
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Tae-Shin Park
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Dong-Hee Choi
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Yu-Jin Jeong
- Department of Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jong-Hwan Park
- Department of Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyeon Sik Kim
- Medical Photonic Research Center, Korea Photonics Technology Institute, Gwangju, 61007, Republic of Korea
| | - Jung-Joon Min
- Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Yong Sook Kim
- Biomedical Research Institute, Chonnam National University Hospital, Gwangju, 61469, Republic of Korea
| | - Joon Tae Park
- Department of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon, 22012, Republic of Korea
| | - Jae-Ho Cho
- Combinatorial Tumor Immunotherapy Medical Research Center, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Gil-Woo Lee
- Combinatorial Tumor Immunotherapy Medical Research Center, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Ji Hyeon Lee
- Department of Biological Sciences and Bioengineering, Inha University, Incheon, 22212, Republic of Korea
| | - Hyon E Choy
- Department of Microbiology, Chonnam National University Medical School, 264 Seoyang-ro, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Sang Chul Park
- Future Life and Society Research Center, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea
| | - Chul-Ho Lee
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea.
| | - Joon Haeng Rhee
- Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea.
- Combinatorial Tumor Immunotherapy Medical Research Center, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea.
- Department of Microbiology, Chonnam National University Medical School, 264 Seoyang-ro, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea.
| | - Manuel Serrano
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST), Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain.
- Altos Labs, Cambridge Institute of Science, Cambridge, UK.
| | - Kyung A Cho
- Department of Biochemistry, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea.
- MediSpan, Inc, Bundang-gu, Gyeonggi-do, 13486, Republic of Korea.
- Center for Creative Biomedical Scientists, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea.
- Future Life and Society Research Center, Chonnam National University Medical School, Hwasun-gun, Jeonnam-do, 58128, Republic of Korea.
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Sankar S, Ganesh PS, Subramaniam S, Shankar EM, Yuwanati M, Govindasamy R, Thiruvengadam M. Host cell responses against the pseudomonal biofilm: A continued tale of host-pathogen interactions. Microb Pathog 2023; 174:105940. [PMID: 36513294 DOI: 10.1016/j.micpath.2022.105940] [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: 11/21/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022]
Abstract
In biofilm formation, pathogens within the bacterial community coordinate a cell-cell communication system called quorum sensing (QS). This is achieved through various signalling pathways that regulate bacterial virulence and host immune response. Here, we reviewed the host responses, key clinical implications, and novel therapeutic approaches against the biofilms of P. aeruginosa. Given the high degree of intrinsic antibiotic resistance and biofilm formation by the pathogen, the ensuing treatment complications could result in high morbidity and mortality rates worldwide. Notwithstanding the availability of intervention strategies, there remains a paucity of effective therapeutic options to control biofilmogenesis. This review discusses the basic understanding of QS-associated virulence factors and several key therapeutic interventions to foil the biofilm menace of P. aeruginosa.
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Affiliation(s)
- Sathish Sankar
- Department of Microbiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Science, Chennai, 600 077, Tamil Nadu, India.
| | - Pitchaipillai Sankar Ganesh
- Department of Microbiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Science, Chennai, 600 077, Tamil Nadu, India.
| | - Suganya Subramaniam
- Department of Biotechnology, MMES Women's Arts and Science College, Melvisharam, 632 509, Tamil Nadu, India
| | - Esaki M Shankar
- Infection and Inflammation, Department of Biotechnology, Central University of Tamil Nadu, Thiruvarur, 610 005, Tamil Nadu, India
| | - Monal Yuwanati
- Department of Oral Pathology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Science, Chennai, 600 077, Tamil Nadu, India
| | - Rajakumar Govindasamy
- Department of Orthodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, Tamil Nadu, India
| | - Muthu Thiruvengadam
- Department of Applied Bioscience, College of Life and Environmental Sciences, Konkuk University, Seoul, 05029, South Korea.
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Hou H, Tian G, Fu J, Qin C, Chen G, Zou X, Hu J, Yin J. Highly stereoselective construction of 1,2- cis-D-quinovosamine glycosides for the synthesis of Pseudomonas aeruginosa O-antigen disaccharide. J Carbohydr Chem 2022. [DOI: 10.1080/07328303.2022.2055049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Hongli Hou
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Guangzong Tian
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Junjie Fu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chunjun Qin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Guodong Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiaopeng Zou
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Jing Hu
- Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Jian Yin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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6
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Surface Glucan Structures in Aeromonas spp. Mar Drugs 2021; 19:md19110649. [PMID: 34822520 PMCID: PMC8625153 DOI: 10.3390/md19110649] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 01/24/2023] Open
Abstract
Aeromonas spp. are generally found in aquatic environments, although they have also been isolated from both fresh and processed food. These Gram-negative, rod-shaped bacteria are mostly infective to poikilothermic animals, although they are also considered opportunistic pathogens of both aquatic and terrestrial homeotherms, and some species have been associated with gastrointestinal and extraintestinal septicemic infections in humans. Among the different pathogenic factors associated with virulence, several cell-surface glucans have been shown to contribute to colonization and survival of Aeromonas pathogenic strains, in different hosts. Lipopolysaccharide (LPS), capsule and α-glucan structures, for instance, have been shown to play important roles in bacterial–host interactions related to pathogenesis, such as adherence, biofilm formation, or immune evasion. In addition, glycosylation of both polar and lateral flagella has been shown to be mandatory for flagella production and motility in different Aeromonas strains, and has also been associated with increased bacterial adhesion, biofilm formation, and induction of the host proinflammatory response. The main aspects of these structures are covered in this review.
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Yuki K, Mitsui Y, Shibamura-Fujiogi M, Hou L, Odegard KC, Soriano SG, Priebe GP, Koutsogiannaki S. Anesthetics isoflurane and sevoflurane attenuate flagellin-mediated inflammation in the lung. Biochem Biophys Res Commun 2021; 557:254-260. [PMID: 33894411 DOI: 10.1016/j.bbrc.2021.04.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 02/07/2023]
Abstract
Isoflurane and sevoflurane are volatile anesthetics (VA) widely used in clinical practice to provide general anesthesia. We and others have previously shown that VAs have immunomodulatory effects and may have a significant impact on the progression of disease states. Flagellin is a component of Gram negative bacteria and plays a significant role in the pathophysiology of bacterial pneumonia through its binding to Toll-like Receptor 5 (TLR5). Our results showed that VAs, not an intravenous anesthetic, significantly attenuated the activation of TLR5 and the release of the neutrophil chemoattractant IL-8 from lung epithelial cells. Furthermore, flagellin-induced lung injury was significantly attenuated by VAs by inhibiting neutrophil migration to the bronchoalveolar space. The lungs of cystic fibrosis (CF) patients are highly colonized by Pseudomonas aeruginosa, which causes inflammation. The retrospective study of oxygenation in patients with CF who had received VA versus intravenous anesthesia suggested that VAs might have the protective effect for gas exchange. To understand the interaction between VAs and TLR5, a docking simulation was performed, which indicated that isoflurane and sevoflurane docked into the binding interphase between TLR5 and flagellin.
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Affiliation(s)
- Koichi Yuki
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA; Department of Immunology, Harvard Medical School, Boston, MA, USA.
| | - Yusuke Mitsui
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA
| | - Miho Shibamura-Fujiogi
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA; Department of Immunology, Harvard Medical School, Boston, MA, USA
| | - Lifei Hou
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA; Department of Immunology, Harvard Medical School, Boston, MA, USA
| | - Kirsten C Odegard
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA
| | - Sulpicio G Soriano
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA
| | - Gregory P Priebe
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA
| | - Sophia Koutsogiannaki
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Anaesthesia, Harvard Medical School, Boston, MA, USA; Department of Immunology, Harvard Medical School, Boston, MA, USA.
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Ardissone S, Kint N, Viollier PH. Specificity in glycosylation of multiple flagellins by the modular and cell cycle regulated glycosyltransferase FlmG. eLife 2020; 9:e60488. [PMID: 33108275 PMCID: PMC7591256 DOI: 10.7554/elife.60488] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022] Open
Abstract
How specificity is programmed into post-translational modification of proteins by glycosylation is poorly understood, especially for O-linked glycosylation systems. Here we reconstitute and dissect the substrate specificity underpinning the cytoplasmic O-glycosylation pathway that modifies all six flagellins, five structural and one regulatory paralog, in Caulobacter crescentus, a monopolarly flagellated alpha-proteobacterium. We characterize the biosynthetic pathway for the sialic acid-like sugar pseudaminic acid and show its requirement for flagellation, flagellin modification and efficient export. The cognate NeuB enzyme that condenses phosphoenolpyruvate with a hexose into pseudaminic acid is functionally interchangeable with other pseudaminic acid synthases. The previously unknown and cell cycle-regulated FlmG protein, a defining member of a new class of cytoplasmic O-glycosyltransferases, is required and sufficient for flagellin modification. The substrate specificity of FlmG is conferred by its N-terminal flagellin-binding domain. FlmG accumulates before the FlaF secretion chaperone, potentially timing flagellin modification, export, and assembly during the cell division cycle.
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Affiliation(s)
- Silvia Ardissone
- Department of Microbiology & Molecular Medicine, Faculty of Medicine / CMU, University of GenevaGenèveSwitzerland
| | - Nicolas Kint
- Department of Microbiology & Molecular Medicine, Faculty of Medicine / CMU, University of GenevaGenèveSwitzerland
| | - Patrick H Viollier
- Department of Microbiology & Molecular Medicine, Faculty of Medicine / CMU, University of GenevaGenèveSwitzerland
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Evidence of early increased sialylation of airway mucins and defective mucociliary clearance in CFTR-deficient piglets. J Cyst Fibros 2020; 20:173-182. [PMID: 32978064 DOI: 10.1016/j.jcf.2020.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 06/29/2020] [Accepted: 09/09/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND Bacterial colonization in cystic fibrosis (CF) lungs has been directly associated to the loss of CFTR function, and/or secondarily linked to repetitive cycles of chronic inflammation/infection. We hypothesized that altered molecular properties of mucins could contribute to this process. METHODS Newborn CFTR+/+ and CFTR-/- were sacrificed before and 6 h after inoculation with luminescent Pseudomonas aeruginosa into the tracheal carina. Tracheal mucosa and the bronchoalveolar lavage (BAL) fluid were collected to determine the level of mucin O-glycosylation, bacteria binding to mucins and the airways transcriptome. Disturbances in mucociliary transport were determined by ex-vivo imaging of luminescent Pseudomonas aeruginosa. RESULTS We provide evidence of an increased sialylation of CF airway mucins and impaired mucociliary transport that occur before the onset of inflammation. Hypersialylation of mucins was reproduced on tracheal explants from non CF animals treated with GlyH101, an inhibitor of CFTR channel activity, indicating a causal relationship between the absence of CFTR expression and the sialylation of mucins. This increased sialylation was correlated to an increased adherence of P. aeruginosa to mucins. In vivo infection of newborn CF piglets by live luminescent P. aeruginosa demonstrated an impairment of mucociliary transport of this bacterium, with no evidence of pre-existing inflammation. CONCLUSIONS Our results document for the first time in a well-defined CF animal model modifications that affect the O-glycan chains of mucins. These alterations precede infection and inflammation of airway tissues, and provide a favorable context for microbial development in CF lung that hallmarks this disease.
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Yiu JHC, Chan KS, Cheung J, Li J, Liu Y, Wang Y, Fung WWL, Cai J, Cheung SWM, Dorweiler B, Wan EYF, Tso P, Xu A, Woo CW. Gut Microbiota-Associated Activation of TLR5 Induces Apolipoprotein A1 Production in the Liver. Circ Res 2020; 127:1236-1252. [PMID: 32820707 PMCID: PMC7580858 DOI: 10.1161/circresaha.120.317362] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Supplemental Digital Content is available in the text. Rationale: Dysbiosis of gut microbiota plays an important role in cardiovascular diseases but the molecular mechanisms are complex. An association between gut microbiome and the variance in HDL-C (high-density lipoprotein-cholesterol) level was suggested in a human study. Besides, dietary fat was shown to increase both HDL-C and LDL-C (low-density lipoprotein-cholesterol) levels. We speculate that certain types of gut bacteria responding to dietary fat may help to regulate HDL-C level and potentially affect atherosclerotic development. Objective: We aimed to investigate whether and how high-fat diet (HFD)-associated gut microbiota regulated HDL-C level. Methods and Results: We found that HFD increased gut flagellated bacteria population in mice. The increase in HDL-C level was adopted by mice receiving fecal microbiome transplantation from HFD-fed mouse donors. HFD led to increased hepatic but not circulating flagellin, and deletion of TLR5 (Toll-like receptor 5), a receptor sensing flagellin, suppressed HFD-stimulated HDL-C and ApoA1 (apolipoprotein A1) levels. Overexpression of TLR5 in the liver of TLR5-knockout mice was able to partially restore the production of ApoA1 and HDL-C levels. Mechanistically, TLR5 activation by flagellin in primary hepatocytes stimulated ApoA1 production through the transcriptional activation responding to the binding of NF-κB (nuclear factor-κB) on Apoa1 promoter region. Furthermore, oral supplementation of flagellin was able to stimulate hepatic ApoA1 production and HDL-C level and decrease atherosclerotic lesion size in apolipoprotein E-deficient (Apoe−/−) mice without triggering hepatic and systemic inflammation. The stimulation of ApoA1 production was also seen in human ApoA1-transgenic mice treated with oral flagellin. Conclusions: Our finding suggests that commensal flagellated bacteria in gut can facilitate ApoA1 and HDL-C productions in liver through activation of TLR5 in hepatocytes. Hepatic TLR5 may be a potential drug target to increase ApoA1.
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Affiliation(s)
- Jensen H C Yiu
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Kam-Suen Chan
- Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Jamie Cheung
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Jin Li
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Medicine (J.L., Y.L., A.X.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Endocrinology, Second Affiliated Hospital, Shanxi Medical University, China (J.L.)
| | - Yan Liu
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Medicine (J.L., Y.L., A.X.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Yao Wang
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - William W L Fung
- Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Jieling Cai
- Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Samson W M Cheung
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Bernhard Dorweiler
- Department of Vascular and Endovascular Surgery, University Hospital Cologne, Germany (B.D.)
| | - Eric Y F Wan
- Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Family Medicine and Primary Care (E.Y.F.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Patrick Tso
- Metabolic Phenotyping Center, Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, OH (P.T.)
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Medicine (J.L., Y.L., A.X.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
| | - Connie W Woo
- State Key Laboratory of Pharmaceutical Biotechnology (J.H.C.Y., J. Cheung, J.L., Y.L., Y.W., J.Cai, S.W.M.C., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China.,Department of Pharmacology and Pharmacy (J.H.C.Y., K.-S.C., J. Cheung, Y.W., W.W.L.F., J. Cai, S.W.M.C., E.Y.F.W., A.X., C.W.W.), Li Ka Shing Faculty of Medicine, the University of Hong Kong, China
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11
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Nahid MA, Campbell CE, Fong KSK, Barnhill JC, Washington MA. An evaluation of the impact of clinical bacterial isolates on epithelial cell monolayer integrity by the electric Cell-Substrate Impedance Sensing (ECIS) method. J Microbiol Methods 2020; 169:105833. [PMID: 31904440 DOI: 10.1016/j.mimet.2020.105833] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 12/30/2019] [Accepted: 01/01/2020] [Indexed: 01/26/2023]
Abstract
Virulence is the relative capacity of a pathogenic microorganism to cause damage in susceptible host cells such as those found in airway passages and the gut. In this study, the effect of clinical bacterial isolates on the monolayer integrity of cultured human alveolar basal epithelial cells (A549) was evaluated using the Electric Cell-Substrate Impedance Sensing (ECIS) system. ECIS is a morphological biosensor which records electrical properties of cell-covered microelectrodes in an AC circuit including impedance (ohm), resistance (ohm), and capacitance (μFarad). In the current study, fluctuations in the electrical properties of cell-covered microelectrodes reflect dynamic changes in cell morphology resulting from disrupted cell monolayers following exposure to bacteria. Using the ECIS system, real-time changes of cell morphology and disruption of monolayer integrity of cell-cultures in vitro were revealed for A549 cells infected with either Pseudomonas aeruginosa, ESBL Escherichia coli, Staphylococcus aureus (MRSA), or Enterococcus (VRE). We determined empirically that the optimal signal response was obtained for resistance (ohm) measurements at 4000 hertz. Following infection of A549 cells, the data revealed that Pseudomonas aeruginosa resulted in little change in microelectrode resistance (ohm @4 kHz) as compared to pathogen-free controls within the first 12 h. In contrast, E. coli, MRSA, and VRE caused significant changes in electrode resistance (ohm @4 kHz) values in the infected cells compared to controls over the first 5 h. Resistance (ohm @4 kHz) changes were also observed in cell monolayers infected with different bacterial concentrations for all isolates over 24 h. The highest concentration of bacteria caused the measured resistance (ohm @4 kHz) to drop faster than its' immediate lower concentration, suggesting a dose-dependent effect. Compared to live bacteria, cells exposed to heat-killed bacteria did not show significant changes in resistance (ohm @4 kHz) over 48 h post-exposure. Functionally, cytokine responses were different between cells treated with live and heat-killed bacteria. Of note, live bacteria induced IFNγ, IL-13, and IL-1β production in A549 cells, whereas heat-killed bacteria induced IL-8 production suggesting a differential interaction with cells that could reveal the underlying causes of resistance (ohm @4 kHz) changes. Our findings indicate that ECIS provides a means to quantify, automate, and measure bacterial virulence, which may have broader implications governing the course of treatment compared to traditional methods alone.
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Affiliation(s)
- Md A Nahid
- United States Army Institute of Surgical Research, San Antonio, TX, United States.
| | - Carmen E Campbell
- Department of Clinical Investigation, Tripler Army Medical Center, Honolulu, HI, United States
| | - Keith S K Fong
- Department of Clinical Investigation, Tripler Army Medical Center, Honolulu, HI, United States
| | - Jason C Barnhill
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, United States
| | - Michael A Washington
- Department of Chemistry and Life Science, United States Military Academy, West Point, NY, United States
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12
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Bhat AH, Maity S, Giri K, Ambatipudi K. Protein glycosylation: Sweet or bitter for bacterial pathogens? Crit Rev Microbiol 2019; 45:82-102. [PMID: 30632429 DOI: 10.1080/1040841x.2018.1547681] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Protein glycosylation systems in many bacteria are often associated with crucial biological processes like pathogenicity, immune evasion and host-pathogen interactions, implying the significance of protein-glycan linkage. Similarly, host protein glycosylation has been implicated in antimicrobial activity as well as in promoting growth of beneficial strains. In fact, few pathogens notably modulate host glycosylation machineries to facilitate their survival. To date, diverse chemical and biological strategies have been developed for conjugate vaccine production for disease control. Bioconjugate vaccines, largely being produced by glycoengineering using PglB (the N-oligosaccharyltransferase from Campylobacter jejuni) in suitable bacterial hosts, have been highly promising with respect to their effectiveness in providing protective immunity and ease of production. Recently, a novel method of glycoconjugate vaccine production involving an O-oligosaccharyltransferase, PglL from Neisseria meningitidis, has been optimized. Nevertheless, many questions on defining antigenic determinants, glycosylation markers, species-specific differences in glycosylation machineries, etc. still remain unanswered, necessitating further exploration of the glycosylation systems of important pathogens. Hence, in this review, we will discuss the impact of bacterial protein glycosylation on its pathogenesis and the interaction of pathogens with host protein glycosylation, followed by a discussion on strategies used for bioconjugate vaccine development.
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Affiliation(s)
- Aadil Hussain Bhat
- a Department of Biotechnology , Indian Institute of Technology Roorkee , Roorkee , Uttarakhand 247667 , India
| | - Sudipa Maity
- a Department of Biotechnology , Indian Institute of Technology Roorkee , Roorkee , Uttarakhand 247667 , India
| | - Kuldeep Giri
- a Department of Biotechnology , Indian Institute of Technology Roorkee , Roorkee , Uttarakhand 247667 , India
| | - Kiran Ambatipudi
- a Department of Biotechnology , Indian Institute of Technology Roorkee , Roorkee , Uttarakhand 247667 , India
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13
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Abstract
The varied landscape of the adaptive immune response is determined by the peptides presented by immune cells, derived from viral or microbial pathogens or cancerous cells. The study of immune biomarkers or antigens is not new, and classical methods such as agglutination, enzyme-linked immunosorbent assay, or Western blotting have been used for many years to study the immune response to vaccination or disease. However, in many of these traditional techniques, protein or peptide identification has often been the bottleneck. Recent progress in genomics and mass spectrometry have led to many of the rapid advances in proteomics approaches. Immunoproteomics describes a rapidly growing collection of approaches that have the common goal of identifying and measuring antigenic peptides or proteins. This includes gel-based, array-based, mass spectrometry-based, DNA-based, or in silico approaches. Immunoproteomics is yielding an understanding of disease and disease progression, vaccine candidates, and biomarkers. This review gives an overview of immunoproteomics and closely related technologies that are used to define the full set of protein antigens targeted by the immune system during disease.
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Affiliation(s)
- Kelly M Fulton
- Human Health Therapeutics Research Centre, National Research Council of Canada, Ottawa, ON, Canada
| | - Isabel Baltat
- Human Health Therapeutics Research Centre, National Research Council of Canada, Ottawa, ON, Canada
| | - Susan M Twine
- Human Health Therapeutics Research Centre, National Research Council of Canada, Ottawa, ON, Canada.
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14
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15
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Bloch S, Zwicker S, Bostanci N, Sjöling Å, Boström EA, Belibasakis GN, Schäffer C. Immune response profiling of primary monocytes and oral keratinocytes to different Tannerella forsythia strains and their cell surface mutants. Mol Oral Microbiol 2018; 33:155-167. [PMID: 29235255 DOI: 10.1111/omi.12208] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2017] [Indexed: 12/18/2022]
Abstract
The oral pathogen Tannerella forsythia possesses a unique surface (S-) layer with a complex O-glycan containing a bacterial sialic acid mimic in the form of either pseudaminic acid or legionaminic acid at its terminal position. We hypothesize that different T. forsythia strains employ these stereoisomeric sugar acids for interacting with the immune system and resident host tissues in the periodontium. Here, we show how T. forsythia strains ATCC 43037 and UB4 displaying pseudaminic acid and legionaminic acid, respectively, and selected cell surface mutants of these strains modulate the immune response in monocytes and human oral keratinocytes (HOK) using a multiplex immunoassay. When challenged with T. forsythia, monocytes secrete proinflammatory cytokines, chemokines and vascular endothelial growth factor (VEGF) with the release of interleukin-1β (IL-1β) and IL-7 being differentially regulated by the two T. forsythia wild-type strains. Truncation of the bacteria's O-glycan leads to significant reduction of IL-1β and regulates macrophage inflammatory protein-1. HOK infected with T. forsythia produce IL-1Ra, chemokines and VEGF. Although the two wild-type strains elicit preferential immune responses for IL-8, both truncation of the O-glycan and deletion of the S-layer result in significantly increased release of IL-8, granulocyte-macrophage colony-stimulating factor and monocyte chemoattractant protein-1. Through immunofluorescence and confocal laser scanning microscopy of infected HOK we additionally show that T. forsythia is highly invasive and tends to localize to the perinuclear region. This indicates, that the T. forsythia S-layer and attached sugars, particularly pseudaminic acid in ATCC 43037, contribute to dampening the response of epithelial tissues to initial infection and hence play a pivotal role in orchestrating the bacterium's virulence.
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Affiliation(s)
- S Bloch
- Department of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria
| | - S Zwicker
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - N Bostanci
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Å Sjöling
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - E A Boström
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - G N Belibasakis
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - C Schäffer
- Department of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria
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16
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Roux D, Schaefers M, Clark BS, Weatherholt M, Renaud D, Scott D, LiPuma JJ, Priebe G, Gerard C, Yoder-Himes DR. A putative lateral flagella of the cystic fibrosis pathogen Burkholderia dolosa regulates swimming motility and host cytokine production. PLoS One 2018; 13:e0189810. [PMID: 29346379 PMCID: PMC5773237 DOI: 10.1371/journal.pone.0189810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 12/01/2017] [Indexed: 01/25/2023] Open
Abstract
Burkholderia dolosa caused an outbreak in the cystic fibrosis clinic at Boston Children's Hospital and was associated with high mortality in these patients. This species is part of a larger complex of opportunistic pathogens known as the Burkholderia cepacia complex (Bcc). Compared to other species in the Bcc, B. dolosa is highly transmissible; thus understanding its virulence mechanisms is important for preventing future outbreaks. The genome of one of the outbreak strains, AU0158, revealed a homolog of the lafA gene encoding a putative lateral flagellin, which, in other non-Bcc species, is used for movement on solid surfaces, attachment to host cells, or movement inside host cells. Here, we analyzed the conservation of the lafA gene and protein sequences, which are distinct from those of the polar flagella, and found lafA homologs to be present in numerous β-proteobacteria but notably absent from most other Bcc species. A lafA deletion mutant in B. dolosa showed a greater swimming motility than wild-type due to an increase in the number of polar flagella, but did not appear to contribute to biofilm formation, host cell invasion, or murine lung colonization or persistence over time. However, the lafA gene was important for cytokine production in human peripheral blood mononuclear cells, suggesting it may have a role in recognition by the human immune response.
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Affiliation(s)
- Damien Roux
- INSERM, IAME, UMR 1137, Paris, France
- Univ Paris Diderot, Sorbonne Paris Cité, Paris, France
- AP-HP, Louis Mourier Hospital, Intensive Care Unit, Colombes, France
| | - Matthew Schaefers
- Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Department of Anesthesia, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Bradley S. Clark
- Department of Biology, University of Louisville, Louisville, Kentucky, United States of America
| | - Molly Weatherholt
- Department of Biology, University of Louisville, Louisville, Kentucky, United States of America
| | - Diane Renaud
- Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, United States of America
| | - David Scott
- Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, United States of America
| | - John J. LiPuma
- Division of Pediatrics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Gregory Priebe
- Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Department of Anesthesia, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Craig Gerard
- Division of Respiratory Diseases, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | - Deborah R. Yoder-Himes
- Department of Biology, University of Louisville, Louisville, Kentucky, United States of America
- * E-mail:
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17
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Radomska KA, Wösten MMSM, Ordoñez SR, Wagenaar JA, van Putten JPM. Importance of Campylobacter jejuni FliS and FliW in Flagella Biogenesis and Flagellin Secretion. Front Microbiol 2017; 8:1060. [PMID: 28659885 PMCID: PMC5466977 DOI: 10.3389/fmicb.2017.01060] [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] [Received: 02/24/2017] [Accepted: 05/29/2017] [Indexed: 12/11/2022] Open
Abstract
Flagella-driven motility enables bacteria to reach their favorable niche within the host. The human foodborne pathogen Campylobacter jejuni produces two heavily glycosylated structural flagellins (FlaA and FlaB) that form the flagellar filament. It also encodes the non-structural FlaC flagellin which is secreted through the flagellum and has been implicated in host cell invasion. The mechanisms that regulate C. jejuni flagellin biogenesis and guide the proteins to the export apparatus are different from those in most other enteropathogens and are not fully understood. This work demonstrates the importance of the putative flagellar protein FliS in C. jejuni flagella assembly. A constructed fliS knockout strain was non-motile, displayed reduced levels of FlaA/B and FlaC flagellin, and carried severely truncated flagella. Pull-down and Far Western blot assays showed direct interaction of FliS with all three C. jejuni flagellins (FlaA, FlaB, and FlaC). This is in contrast to, the sensor and regulator of intracellular flagellin levels, FliW, which bound to FlaA and FlaB but not to FlaC. The FliS protein but not FliW preferred binding to glycosylated C. jejuni flagellins rather than to their non-glycosylated recombinant counterparts. Mapping of the binding region of FliS and FliW using a set of flagellin fragments showed that the C-terminal subdomain of the flagellin was required for FliS binding, whereas the N-terminal subdomain was essential for FliW binding. The separate binding subdomains required for FliS and FliW, the different substrate specificity, and the differential preference for binding of glycosylated flagellins ensure optimal processing and assembly of the C. jejuni flagellins.
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Affiliation(s)
- Katarzyna A Radomska
- Department of Infectious Diseases and Immunology, Utrecht UniversityUtrecht, Netherlands
| | - Marc M S M Wösten
- Department of Infectious Diseases and Immunology, Utrecht UniversityUtrecht, Netherlands
| | - Soledad R Ordoñez
- Department of Infectious Diseases and Immunology, Utrecht UniversityUtrecht, Netherlands
| | - Jaap A Wagenaar
- Department of Infectious Diseases and Immunology, Utrecht UniversityUtrecht, Netherlands.,Wageningen Bioveterinary ResearchLelystad, Netherlands.,WHO Collaborating Centre for Campylobacter/OIE Reference Laboratory for CampylobacteriosisUtrecht, Netherlands
| | - Jos P M van Putten
- Department of Infectious Diseases and Immunology, Utrecht UniversityUtrecht, Netherlands.,WHO Collaborating Centre for Campylobacter/OIE Reference Laboratory for CampylobacteriosisUtrecht, Netherlands
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18
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Immune Recognition of the Epidemic Cystic Fibrosis Pathogen Burkholderia dolosa. Infect Immun 2017; 85:IAI.00765-16. [PMID: 28348057 DOI: 10.1128/iai.00765-16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 03/20/2017] [Indexed: 12/31/2022] Open
Abstract
Burkholderia dolosa caused an outbreak in the cystic fibrosis (CF) clinic at Boston Children's Hospital from 1998 to 2005 and led to the infection of over 40 patients, many of whom died due to complications from infection by this organism. To assess whether B. dolosa significantly contributes to disease or is recognized by the host immune response, mice were infected with a sequenced outbreak B. dolosa strain, AU0158, and responses were compared to those to the well-studied CF pathogen Pseudomonas aeruginosa In parallel, mice were also infected with a polar flagellin mutant of B. dolosa to examine the role of flagella in B. dolosa lung colonization. The results showed a higher persistence in the host by B. dolosa strains, and yet, neutrophil recruitment and cytokine production were lower than those with P. aeruginosa The ability of host immune cells to recognize B. dolosa was then assessed, B. dolosa induced a robust cytokine response in cultured cells, and this effect was dependent on the flagella only when bacteria were dead. Together, these results suggest that B. dolosa can be recognized by host cells in vitro but may avoid or suppress the host immune response in vivo through unknown mechanisms. B. dolosa was then compared to other Burkholderia species and found to induce similar levels of cytokine production despite being internalized by macrophages more than Burkholderia cenocepacia strains. These data suggest that B. dolosa AU0158 may act differently with host cells and is recognized differently by immune systems than are other Burkholderia strains or species.
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19
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Ryu JC, Kim MJ, Kwon Y, Oh JH, Yoon SS, Shin SJ, Yoon JH, Ryu JH. Neutrophil pyroptosis mediates pathology of P. aeruginosa lung infection in the absence of the NADPH oxidase NOX2. Mucosal Immunol 2017; 10:757-774. [PMID: 27554297 DOI: 10.1038/mi.2016.73] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 07/21/2016] [Indexed: 02/04/2023]
Abstract
Nod-like receptor family, CARD domain-containing 4 (NLRC4) inflammasome activation is required for efficient clearance of intracellular pathogens through caspsase-1-dependent pyroptosis in macrophages. Although neutrophils have a critical role in protection from Pseudomonas aeruginosa infection, the mechanisms regulating inflammasome-mediated pyroptosis in neutrophils and its physiological role are largely unknown. We sought to determine the specific mechanisms regulating neutrophil pyroptosis in P. aeruginosa strain PAO1 (PAO1) lung infection and to identify the pathological role of this process. Nox2-/- models with reduced neutrophil antibacterial activity exhibited increased neutrophil pyroptosis, which was mediated by flagellin, a pathogenic PAO1 component. We also demonstrate that PAO1-induced pyroptosis depended on NLRC4 and Toll-like receptor 5 (TLR5) in neutrophils generated from Nlrc4-/- or Tlr5-/- mice. Our study reveals previously unknown mechanisms and physiological role of neutrophil pyroptosis during P. aeruginosa lung infection. Furthermore, our findings regarding neutrophil pyroptosis in the context of neutrophil dysfunction may explain the causes of acute and/or chronic infectious diseases discovered in immune-compromised patients.
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Affiliation(s)
- J-C Ryu
- Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M-J Kim
- Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Y Kwon
- Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Oh
- Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - S S Yoon
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - S J Shin
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Yoon
- Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.,The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Ryu
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Korea
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20
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Yu X, Åvall-Jääskeläinen S, Koort J, Lindholm A, Rintahaka J, von Ossowski I, Palva A, Hynönen U. A Comparative Characterization of Different Host-sourced Lactobacillus ruminis Strains and Their Adhesive, Inhibitory, and Immunomodulating Functions. Front Microbiol 2017; 8:657. [PMID: 28450859 PMCID: PMC5390032 DOI: 10.3389/fmicb.2017.00657] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 03/30/2017] [Indexed: 12/19/2022] Open
Abstract
Lactobacillus ruminis, an autochthonous member of the gastrointestinal microbiota of humans and many animals, is a less characterized but interesting species for many reasons, including its intestinal prevalence and possible positive roles in host–microbe crosstalk. In this study, we isolated a novel L. ruminis strain (GRL 1172) from porcine feces and analyzed its functional characteristics and niche adaptation factors in parallel with those of three other L. ruminis strains (a human isolate, ATCC 25644, and two bovine isolates, ATCC 27780 and ATCC 27781). All the strains adhered to fibronectin, type I collagen, and human colorectal adenocarcinoma cells (HT-29), but poorly to type IV collagen, porcine intestinal epithelial cells (IPEC-1), and human colon adenocarcinoma cells (Caco-2). In competition assays, all the strains were able to inhibit the adhesion of Yersinia enterocolitica and enterotoxigenic Escherichia coli (ETEC, F4+) to fibronectin, type I; collagen, IPEC-1, and Caco-2 cells, and the inhibition rates tended to be higher than in exclusion assays. The culture supernatants of the tested strains inhibited the growth of six selected pathogens to varying extents. The inhibition was solely based on the low pH resulting from acid production during growth. All four L. ruminis strains supported the barrier function maintenance of Caco-2 cells, as shown by the modest increase in trans-epithelial electrical resistance and the prevention of dextran diffusion during co-incubation. However, the strains could not prevent the barrier damage caused by ETEC in the Caco-2 cell model. All the tested strains and their culture supernatants were able to provoke Toll-like receptor (TLR) 2-mediated NF-κB activation and IL-8 production in vitro to varying degrees. The induction of TLR5 signaling revealed that flagella were expressed by all the tested strains, but to different extents. Flagella and pili were observed by electron microscopy on the newly isolated strain GRL 1172.
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Affiliation(s)
- Xia Yu
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Silja Åvall-Jääskeläinen
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Joanna Koort
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Agneta Lindholm
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Johanna Rintahaka
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Ingemar von Ossowski
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Airi Palva
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
| | - Ulla Hynönen
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of HelsinkiHelsinki, Finland
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21
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Floyd M, Winn M, Cullen C, Sil P, Chassaing B, Yoo DG, Gewirtz AT, Goldberg JB, McCarter LL, Rada B. Swimming Motility Mediates the Formation of Neutrophil Extracellular Traps Induced by Flagellated Pseudomonas aeruginosa. PLoS Pathog 2016; 12:e1005987. [PMID: 27855208 PMCID: PMC5113990 DOI: 10.1371/journal.ppat.1005987] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 10/10/2016] [Indexed: 12/11/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen causing severe infections often characterized by robust neutrophilic infiltration. Neutrophils provide the first line of defense against P. aeruginosa. Aside from their defense conferred by phagocytic activity, neutrophils also release neutrophil extracellular traps (NETs) to immobilize bacteria. Although NET formation is an important antimicrobial process, the details of its mechanism are largely unknown. The identity of the main components of P. aeruginosa responsible for triggering NET formation is unclear. In this study, our focus was to identify the main bacterial factors mediating NET formation and to gain insight into the underlying mechanism. We found that P. aeruginosa in its exponential growth phase promoted strong NET formation in human neutrophils while its NET-inducing ability dramatically decreased at later stages of bacterial growth. We identified the flagellum as the primary component of P. aeruginosa responsible for inducing NET extrusion as flagellum-deficient bacteria remained seriously impaired in triggering NET formation. Purified P. aeruginosa flagellin, the monomeric component of the flagellum, does not stimulate NET formation in human neutrophils. P. aeruginosa-induced NET formation is independent of the flagellum-sensing receptors TLR5 and NLRC4 in both human and mouse neutrophils. Interestingly, we found that flagellar motility, not flagellum binding to neutrophils per se, mediates NET release induced by flagellated bacteria. Immotile, flagellar motor-deficient bacterial strains producing paralyzed flagella did not induce NET formation. Forced contact between immotile P. aeruginosa and neutrophils restored their NET-inducing ability. Both the motAB and motCD genetic loci encoding flagellar motor genes contribute to maximal NET release; however the motCD genes play a more important role. Phagocytosis of P. aeruginosa and superoxide production by neutrophils were also largely dependent upon a functional flagellum. Taken together, the flagellum is herein presented for the first time as the main organelle of planktonic bacteria responsible for mediating NET release. Furthermore, flagellar motility, rather than binding of the flagellum to flagellum-sensing receptors on host cells, is required for P. aeruginosa to induce NET release.
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Affiliation(s)
- Madison Floyd
- College of Veterinary Medicine, Department of Infectious Diseases, The University of Georgia, Athens, Georgia, United States of America
| | - Matthew Winn
- College of Veterinary Medicine, Department of Infectious Diseases, The University of Georgia, Athens, Georgia, United States of America
| | - Christian Cullen
- College of Veterinary Medicine, Department of Infectious Diseases, The University of Georgia, Athens, Georgia, United States of America
| | - Payel Sil
- College of Veterinary Medicine, Department of Infectious Diseases, The University of Georgia, Athens, Georgia, United States of America
| | - Benoit Chassaing
- Center for Inflammation, Immunity, & Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, Georgia, United States of America
| | - Dae-goon Yoo
- College of Veterinary Medicine, Department of Infectious Diseases, The University of Georgia, Athens, Georgia, United States of America
| | - Andrew T. Gewirtz
- Center for Inflammation, Immunity, & Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, Georgia, United States of America
| | - Joanna B. Goldberg
- Division of Pulmonology, Allergy/Immunology, Cystic Fibrosis and Sleep, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Linda L. McCarter
- Carver College of Medicine, Department of Microbiology, The University of Iowa, Iowa City, Iowa, United States of America
| | - Balázs Rada
- College of Veterinary Medicine, Department of Infectious Diseases, The University of Georgia, Athens, Georgia, United States of America
- * E-mail:
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22
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Cheng Z. APseudomonas aeruginosa-secreted protease modulates host intrinsic immune responses, but how? Bioessays 2016; 38:1084-1092. [DOI: 10.1002/bies.201600101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhenyu Cheng
- Department of Microbiology and Immunology; Dalhousie University; Halifax Nova Scotia Canada
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23
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Abstract
There is an ongoing race between bacterial evolution and medical advances. Pathogens have the advantages of short generation times and horizontal gene transfer that enable rapid adaptation to new host environments and therapeutics that currently outpaces clinical research. Antibiotic resistance, the growing impact of nosocomial infections, cancer-causing bacteria, the risk of zoonosis, and the possibility of biowarfare all emphasize the increasingly urgent need for medical research focussed on bacterial pathogens. Bacterial glycoproteins are promising targets for alternative therapeutic intervention since they are often surface exposed, involved in host-pathogen interactions, required for virulence, and contain distinctive glycan structures. The potential exists to exploit these unique structures to improve clinical prevention, diagnosis, and treatment strategies. Translation of the potential in this field to actual clinical impact is an exciting prospect for fighting infectious diseases.
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Affiliation(s)
- Kelly M Fulton
- a Human Health Therapeutics Portfolio , National Research Council Canada , Ottawa , Canada
| | - Jeffrey C Smith
- b Department of Chemistry and Institute of Biochemistry , Carleton University , Ottawa , Canada
| | - Susan M Twine
- a Human Health Therapeutics Portfolio , National Research Council Canada , Ottawa , Canada
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24
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Kajikawa A, Midorikawa E, Masuda K, Kondo K, Irisawa T, Igimi S, Okada S. Characterization of flagellins isolated from a highly motile strain of Lactobacillus agilis. BMC Microbiol 2016; 16:49. [PMID: 27001290 PMCID: PMC4802830 DOI: 10.1186/s12866-016-0667-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 03/07/2016] [Indexed: 01/08/2023] Open
Abstract
Background Most lactic acid bacteria are non-motile but some of them are flagellated and exhibit motility. So far, motile lactobacilli have rarely been studied, and characteristics of their flagellins are poorly understood. In this study, a highly motile strain of Lactobacillus agilis was recruited for transcriptional analysis and characterization of its flagellins. Results Unlike another motile lactic acid bacteria of intestinal isolate, Lactobacillus ruminis, flagellar filaments of the L. agilis strain probably consist of two homologous but distinct flagellins. Glycosylation of the flagellar filaments and their resistance to heat, acid and SDS were also observed. The immunological activity of the flagellins was evaluated through the stimulation of Caco-2 cells. The results show that TLR5-stimulating activity of the protein is attenuated, likely due to an incomplete TLR5-recognition site. Conclusions The flagella filaments of L. agilis BKN88 consist of two homologous glycosylated flagellins, which likely have an incomplete TLR5-recognition site. The characteristics of the flagellin are presumably a consequence of adaptation as a commensal microbe in the gastrointestinal tract.
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Affiliation(s)
- Akinobu Kajikawa
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo, 156-8502, Japan.
| | - Emiko Midorikawa
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo, 156-8502, Japan
| | - Kazuya Masuda
- Division of Biomedical Food Research, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya, Tokyo, 158-8501, Japan
| | - Kazuho Kondo
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo, 156-8502, Japan
| | - Tomohiro Irisawa
- Department of Animal Science, Tokyo University of Agriculture, 1737 Funako, Atsugi, Kanagawa, 243-0034, Japan
| | - Shizunobu Igimi
- Division of Biomedical Food Research, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya, Tokyo, 158-8501, Japan
| | - Sanae Okada
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo, 156-8502, Japan
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25
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Induction of humoral immune response against Pseudomonas aeruginosa flagellin(1-161) using gold nanoparticles as an adjuvant. Vaccine 2016; 34:1472-9. [DOI: 10.1016/j.vaccine.2016.01.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 01/11/2016] [Accepted: 01/17/2016] [Indexed: 01/25/2023]
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26
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Robinson CM, Kobe BN, Schmitt DM, Phair B, Gilson T, Jung JY, Roberts L, Liao J, Camerlengo C, Chang B, Davis M, Figurski L, Sindeldecker D, Horzempa J. Genetic engineering of Francisella tularensis LVS for use as a novel live vaccine platform against Pseudomonas aeruginosa infections. Bioengineered 2016; 6:82-8. [PMID: 25617059 PMCID: PMC4601302 DOI: 10.1080/21655979.2015.1011033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Francisella tularensis LVS (Live Vaccine Strain) is an attenuated bacterium that has been used as a live vaccine. Patients immunized with this organism show a very long-term memory response (over 30 years post vaccination) evidenced by the presence of indicators of robust cell-mediated immunity. Because F. tularensis LVS is such a potent vaccine, we hypothesized that this organism would be an effective vaccine platform. First, we sought to determine if we could genetically modify this strain to produce protective antigens of a heterologous pathogen. Currently, there is not a licensed vaccine against the important opportunistic bacterial pathogen, Pseudomonas aeruginosa. Because many P. aeruginosa strains are also drug resistant, the need for effective vaccines is magnified. Here, F. tularensis LVS was genetically modified to express surface proteins PilAPa, OprFPa, and FliCPa of P. aeruginosa. Immunization of mice with LVS expressing the recombinant FliCPa led to a significant production of antibodies specific for P. aeruginosa. However, mice that had been immunized with LVS expressing PilAPa or OprFPa did not produce high levels of antibodies specific for P. aerugionsa. Therefore, the recombinant LVS strain engineered to produce FliCPa may be able to provide immune protection against a P. aeruginosa challenge. However for future use of this vaccine platform, selection of the appropriate recombinant antigen is critical as not all recombinant antigens expressed in this strain were immunogenic.
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Affiliation(s)
- Cory M Robinson
- a Biomedical Sciences Department ; West Virginia School of Osteopathic Medicine ; Lewisburg , WV USA
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27
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González-Stegmaier R, Guzmán F, Albericio F, Villarroel-Espíndola F, Romero A, Mulero V, Mercado L. A synthetic peptide derived from the D1 domain of flagellin induced the expression of proinflammatory cytokines in fish macrophages. FISH & SHELLFISH IMMUNOLOGY 2015; 47:239-244. [PMID: 26363237 DOI: 10.1016/j.fsi.2015.09.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 09/06/2015] [Accepted: 09/07/2015] [Indexed: 06/05/2023]
Abstract
Flagellin is the main protein component of flagellum in Gram negative and positive bacteria, and it is also the ligand that activates the Toll-like receptor 5 (TLR5) in fish and mammals. In higher vertebrates, flagellin induces the activation of the membrane-bound TLR5 (TLR5M), which promotes the expression of proinflammatory cytokines and chemokines, and other immunological functions. We have previously reported that recombinant flagellin from Vibrio anguillarum and its ND1 domain are able to upregulate the expression of genes encoding major the proinflammatory mediators in gilthead seabream and rainbow trout macrophages. Considering the key role of D1 domain of flagellin for binding to TLR5M and its immunostimulatory activity, we designed and chemically synthesized a peptide derived of this region. The effects of the synthetic peptide were evaluated in vitro using head kidney macrophages from gilthead seabream (Sparus aurata L., Perciformes, Sparidae) and rainbow trout (Oncorhynchus mykiss W., Salmoniformes, Salmonidae). In both species the expression of genes encoding the proinflammatory cytokines interleukin-1β (IL-1β) and tumour necrosis factor-α (TNF-α), and the chemokine IL-8, was induced upon stimulation of macrophages with the D1 domain synthetic peptide. IL-1β and IL-8 were the most upregulated genes and to a lesser extent TNF-α. Interestingly, however, the induction activity of the synthetic peptide was higher in gilthead seabream than in rainbow trout macrophages. The results were confirmed at the protein levels for IL-8. Collectively, these results suggest that synthetic peptide derived from flagelling could be a promising approach for the immunostimulation and vaccination of farmed fish.
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Affiliation(s)
- Roxana González-Stegmaier
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Laboratorio de Biotecnología y Patología Acuática, Instituto de Patología Animal, Universidad Austral de Chile, Valdivia, Chile; Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Chile.
| | - Fanny Guzmán
- Núcleo de Biotecnología Curauma (NBC), Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Fernando Albericio
- Institute for Research in Biomedicine, and CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, Barcelona, Spain; Department of Organic Chemistry, University of Barcelona, Barcelona, Spain; School of Chemistry, Yachay Tech, Yachay City of Knowledge, 100199, Urcuqui, Ecuador
| | - Franz Villarroel-Espíndola
- Instituto de Bioquímica y Microbiología, Universidad Austral de Chile, Valdivia, Chile; Escuela de Tecnología Médica, Universidad Santo Tomas, Valdivia, Chile
| | - Alex Romero
- Laboratorio de Biotecnología y Patología Acuática, Instituto de Patología Animal, Universidad Austral de Chile, Valdivia, Chile; Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Chile
| | - Victoriano Mulero
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, IMIB-Arrixaca, 30100, Murcia, Spain
| | - Luis Mercado
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
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28
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The sweet tooth of bacteria: common themes in bacterial glycoconjugates. Microbiol Mol Biol Rev 2015; 78:372-417. [PMID: 25184559 DOI: 10.1128/mmbr.00007-14] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Humans have been increasingly recognized as being superorganisms, living in close contact with a microbiota on all their mucosal surfaces. However, most studies on the human microbiota have focused on gaining comprehensive insights into the composition of the microbiota under different health conditions (e.g., enterotypes), while there is also a need for detailed knowledge of the different molecules that mediate interactions with the host. Glycoconjugates are an interesting class of molecules for detailed studies, as they form a strain-specific barcode on the surface of bacteria, mediating specific interactions with the host. Strikingly, most glycoconjugates are synthesized by similar biosynthesis mechanisms. Bacteria can produce their major glycoconjugates by using a sequential or an en bloc mechanism, with both mechanistic options coexisting in many species for different macromolecules. In this review, these common themes are conceptualized and illustrated for all major classes of known bacterial glycoconjugates, with a special focus on the rather recently emergent field of glycosylated proteins. We describe the biosynthesis and importance of glycoconjugates in both pathogenic and beneficial bacteria and in both Gram-positive and -negative organisms. The focus lies on microorganisms important for human physiology. In addition, the potential for a better knowledge of bacterial glycoconjugates in the emerging field of glycoengineering and other perspectives is discussed.
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29
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Type IV pilus glycosylation mediates resistance of Pseudomonas aeruginosa to opsonic activities of the pulmonary surfactant protein A. Infect Immun 2015; 83:1339-46. [PMID: 25605768 DOI: 10.1128/iai.02874-14] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pseudomonas aeruginosa is a major bacterial pathogen commonly associated with chronic lung infections in cystic fibrosis (CF). Previously, we have demonstrated that the type IV pilus (Tfp) of P. aeruginosa mediates resistance to antibacterial effects of pulmonary surfactant protein A (SP-A). Interestingly, P. aeruginosa strains with group I pilins are O-glycosylated through the TfpO glycosyltransferase with a single subunit of O-antigen (O-ag). Importantly, TfpO-mediated O-glycosylation is important for virulence in mouse lungs, exemplified by more frequent lung infection in CF with TfpO-expressing P. aeruginosa strains. However, the mechanism underlying the importance of Tfp glycosylation in P. aeruginosa pathogenesis is not fully understood. Here, we demonstrated one mechanism of increased fitness mediated by O-glycosylation of group 1 pilins on Tfp in the P. aeruginosa clinical isolate 1244. Using an acute pneumonia model in SP-A+/+ versus SP-A-/- mice, the O-glycosylation-deficient ΔtfpO mutant was found to be attenuated in lung infection. Both 1244 and ΔtfpO strains showed equal levels of susceptibility to SP-A-mediated membrane permeability. In contrast, the ΔtfpO mutant was more susceptible to opsonization by SP-A and by other pulmonary and circulating opsonins, SP-D and mannose binding lectin 2, respectively. Importantly, the increased susceptibility to phagocytosis was abrogated in the absence of opsonins. These results indicate that O-glycosylation of Tfp with O-ag specifically confers resistance to opsonization during host-mediated phagocytosis.
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30
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González-Stegmaier R, Romero A, Estepa A, Montero J, Mulero V, Mercado L. Effects of recombinant flagellin B and its ND1 domain from Vibrio anguillarum on macrophages from gilthead seabream (Sparus aurata L.) and rainbow trout (Oncorhynchus mykiss, W.). FISH & SHELLFISH IMMUNOLOGY 2015; 42:144-152. [PMID: 25449380 DOI: 10.1016/j.fsi.2014.10.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 10/21/2014] [Accepted: 10/28/2014] [Indexed: 06/04/2023]
Abstract
Flagellin is the principal component of flagellum in Gram negative and positive bacteria, and it is also the ligand that activates the Toll-like receptor 5 (TLR5) in mammals and fish. In higher vertebrates, flagellin induces the activation of the membrane-bound TLR5 (TLR5M), which promotes the expression of proinflammatory cytokines and chemokines and the co-stimulatory molecules present in antigen-presenting cells needed for the activation of T cells. In the present study, we report the production of two recombinant proteins of Vibrio anguillarum: i) a full length flagellin B (FlaB) (rFla) and ii) the amino-terminus of the D1 domain (rND1) of the same protein, the region mainly responsible for binding to TLR5 and for the immunostimulatory activity of flagellin. The effects of these recombinant proteins were assessed in vitro using head kidney macrophages of gilthead seabream (Sparus aurata L., Perciformes, Sparidae) and rainbow trout (Oncorhynchus mykiss W., Salmoniformes, Salmonidae). In both species, 3 h of stimulation with rFla and rND1 induced expression of the proinflammatory cytokines interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α), and of the chemokine IL-8. In gilthead seabream macrophages stimulated with rFla and rND1, a 900- and 6-fold increase were observed for IL-1β transcription, while a 900- and 3-fold increase were recorded for IL-8 transcription, respectively, as compared to non-stimulated macrophages. In rainbow trout, rFla increased expression of IL-8 40-fold in macrophages, whereas rND1 increased expression of the chemokine 3-fold, as compared to non-stimulated cells. The results obtained for rFla and rND1 demonstrate their modulatory capabilities in vitro, suggesting that rFla and rND1 could be evaluated as immunostimulatory candidates for use in farmed fish. However, further in vivo studies are needed to confirm and expand on the present results.
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Affiliation(s)
- Roxana González-Stegmaier
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Laboratorio de Biotecnología y Patología Acuática, Instituto de Patología Animal, Universidad Austral de Chile, Valdivia, Chile; Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Chile.
| | - Alex Romero
- Laboratorio de Biotecnología y Patología Acuática, Instituto de Patología Animal, Universidad Austral de Chile, Valdivia, Chile; Centro FONDAP, Interdisciplinary Center for Aquaculture Research (INCAR), Chile
| | - Amparo Estepa
- Institute of Molecular and Cell Biology, Universidad Miguel Hernandez de Elche, Spain
| | - Jana Montero
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain
| | - Victoriano Mulero
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain
| | - Luis Mercado
- Grupo de Marcadores Inmunológicos, Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
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31
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Montero J, Gómez-Casado E, García-Alcázar A, Meseguer J, Mulero V. Flagellin from Marinobacter algicola and Vibrio vulnificus activates the innate immune response of gilthead seabream. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 47:160-167. [PMID: 25020195 DOI: 10.1016/j.dci.2014.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/04/2014] [Accepted: 07/06/2014] [Indexed: 06/03/2023]
Abstract
Adjuvants have emerged as the best tools to enhance the efficacy of vaccination. However, the traditional adjuvants used in aquaculture may cause adverse alterations in fish making necessary the development of new adjuvants able to stimulate the immune system and offer strong protection against infectious pathogens with minimal undesirable effects. In this respect, flagellin seems an attractive candidate due to its ability to strongly stimulate the immune response of fish. In the present study, we have evaluated the ability of recombinant flagellin from Marinobacter algicola (MA) and Vibrio vulnificus (Vvul), a non-pathogenic and a pathogenic bacteria, respectively, to stimulate the innate immune system of gilthead seabream (Sparus aurata L.) and compare the effect with that of the classical flagellin from Salmonella enterica serovar Typhimurium (Salmonella Typhimurium, STF). Intraperitoneal injection of MA and Vvul resulted in a strong inflammatory response characterized by increased reactive oxygen species production and the infiltration of acidophilic granulocytes at the injection site. Interestingly, however, only flagellin from MA consistently induced the expression of the gene encoding pro-inflammatory interleukin-1β. These effects were further confirmed in vitro, where a dose-dependent activation of macrophages and acidophilic granulocytes by MA and Vvul flagellins was observed. In contrast, STF flagellin was found to be less potent in both in vivo and in vitro experiments. Our results suggest the potential use of MA and Vvul flagellins as immunostimulants and adjuvants for fish vaccination.
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Affiliation(s)
- Jana Montero
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia and IMIB-Arrixaca, Murcia, Spain
| | - Eduardo Gómez-Casado
- Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Alicia García-Alcázar
- Oceanographic Centre of Murcia, Spanish Oceanographic Institute (IEO), Puerto de Mazarrón, Murcia, Spain
| | - José Meseguer
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia and IMIB-Arrixaca, Murcia, Spain
| | - Victoriano Mulero
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia and IMIB-Arrixaca, Murcia, Spain.
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32
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Flagellin concentrations in expectorations from cystic fibrosis patients. BMC Pulm Med 2014; 14:100. [PMID: 24909229 PMCID: PMC4060841 DOI: 10.1186/1471-2466-14-100] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 05/13/2014] [Indexed: 12/13/2022] Open
Abstract
Background The aim was to measure flagellin concentrations in the expectorations of CF patients and to examine whether there are correlations with the level of respiratory insufficiency and inflammation. Methods Sputum samples from 31 adult patients chronically colonized with P. aeruginosa were collected and analysed for their content of flagellin and IL-8. Clinical data were extracted from patient files. Results Regardless of whether patients are colonized with mucoid strains or not, they carry clones of P. aeruginosa that express flagellin. While flagellin was present in airways of all of our CF patients, it is difficult to ascertain its contribution to inflammation (IL-8) and lung function deterioration. Conclusions This is the first demonstration that flagellin is present in the sputum of patients. Thus, attempts to down regulate inflammation by the use of TLR5 (flagellin receptor) antagonists remain a possibility. However, this result needs to be extended to a larger number of patients to validate it for future research on this subject.
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Hanuszkiewicz A, Pittock P, Humphries F, Moll H, Rosales AR, Molinaro A, Moynagh PN, Lajoie GA, Valvano MA. Identification of the flagellin glycosylation system in Burkholderia cenocepacia and the contribution of glycosylated flagellin to evasion of human innate immune responses. J Biol Chem 2014; 289:19231-44. [PMID: 24841205 DOI: 10.1074/jbc.m114.562603] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Burkholderia cenocepacia is an opportunistic pathogen threatening patients with cystic fibrosis. Flagella are required for biofilm formation, as well as adhesion to and invasion of epithelial cells. Recognition of flagellin via the Toll-like receptor 5 (TLR5) contributes to exacerbate B. cenocepacia-induced lung epithelial inflammatory responses. In this study, we report that B. cenocepacia flagellin is glycosylated on at least 10 different sites with a single sugar, 4,6-dideoxy-4-(3-hydroxybutanoylamino)-D-glucose. We have identified key genes that are required for flagellin glycosylation, including a predicted glycosyltransferase gene that is linked to the flagellin biosynthesis cluster and a putative acetyltransferase gene located within the O-antigen lipopolysaccharide cluster. Another O-antigen cluster gene, rmlB, which is required for flagellin glycan and O-antigen biosynthesis, was essential for bacterial viability, uncovering a novel target against Burkholderia infections. Using glycosylated and nonglycosylated purified flagellin and a cell reporter system to assess TLR5-mediated responses, we also show that the presence of glycan in flagellin significantly impairs the inflammatory response of epithelial cells. We therefore suggest that flagellin glycosylation reduces recognition of flagellin by host TLR5, providing an evasive strategy to infecting bacteria.
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Affiliation(s)
- Anna Hanuszkiewicz
- From the Centre for Infection and Immunity, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast BT9 7AE, Ireland, United Kingdom
| | - Paula Pittock
- the Don Rix Protein Identification Facility, Department of Biochemistry, University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Fiachra Humphries
- the Institute of Immunology, Department of Biology, National University of Ireland at Maynooth, Maynooth, County Kildare, Ireland
| | - Hermann Moll
- the Bioanalytical Chemistry, Research Centre Borstel, 23845 Borstel, Germany
| | - Amanda Roa Rosales
- the Department of Microbiology and Immunology, University of Western Ontario, London, Ontario N6A 5C1, Canada, and
| | - Antonio Molinaro
- the Dipartimento di Scienze Chimiche, Università di Napoli, Federico II, 80134 Naples, Italy
| | - Paul N Moynagh
- From the Centre for Infection and Immunity, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast BT9 7AE, Ireland, United Kingdom, the Institute of Immunology, Department of Biology, National University of Ireland at Maynooth, Maynooth, County Kildare, Ireland
| | - Gilles A Lajoie
- the Don Rix Protein Identification Facility, Department of Biochemistry, University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Miguel A Valvano
- From the Centre for Infection and Immunity, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast BT9 7AE, Ireland, United Kingdom, the Department of Microbiology and Immunology, University of Western Ontario, London, Ontario N6A 5C1, Canada, and
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Rubino R, Bezzerri V, Favia M, Facchini M, Tebon M, Singh AK, Riederer B, Seidler U, Iannucci A, Bragonzi A, Cabrini G, Reshkin SJ, Tamanini A. Pseudomonas aeruginosa reduces the expression of CFTR via post-translational modification of NHERF1. Pflugers Arch 2014; 466:2269-78. [DOI: 10.1007/s00424-014-1474-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 02/05/2014] [Indexed: 10/25/2022]
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35
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Toll-like receptor 9 deficiency protects mice against Pseudomonas aeruginosa lung infection. PLoS One 2014; 9:e90466. [PMID: 24595157 PMCID: PMC3942450 DOI: 10.1371/journal.pone.0090466] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 02/03/2014] [Indexed: 01/15/2023] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen involved in nosocomial infections. While a number of studies have demonstrated the roles of TLR2, TLR4 and TLR5 in host defense againt P. aeruginosa infection, the implication of TLR9 in this process has been overlooked. Here, we show that P. aeruginosa DNA stimulates the inflammatory response through TLR9 pathway in both a cell line and primary alveolar macrophages (AMs). This activation requires asparagine endopeptidase- and endosomal acidification. Interestingly, TLR9-/- mice resisted to lethal lung infection by P. aeruginosa, compared to WT C57BL/6 mice. The resistance of TLR9-/- mice to P. aeruginosa infection was associated with: (i) a higher ability of TLR9-/- AMs to kill P. aeruginosa; (ii) a rapid increase in the pro-inflammatory cytokines such as TNFα, IL-1β and IL-6 production; and (iii) an increase in nitric oxide (NO) production and inductible NO synthase expression in AMs. In addition, inhibition of both IL-1β and NO production resulted in a significant decrease of P. aeruginosa clearance by AMs. Altogether these results indicate that TLR9 plays a detrimental role in pulmonary host defense toward P. aeruginosa by reducing the AMs clearance activity and production of IL-1β and NO necessary for bacteria killing.
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Parker JL, Lowry RC, Couto NAS, Wright PC, Stafford GP, Shaw JG. Maf-dependent bacterial flagellin glycosylation occurs before chaperone binding and flagellar T3SS export. Mol Microbiol 2014; 92:258-72. [PMID: 24527847 PMCID: PMC4065374 DOI: 10.1111/mmi.12549] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2014] [Indexed: 02/06/2023]
Abstract
Bacterial swimming is mediated by rotation of a filament that is assembled via polymerization of flagellin monomers after secretion via a dedicated flagellar Type III secretion system. Several bacteria decorate their flagellin with sialic acid related sugars that is essential for motility. Aeromonas caviae is a model organism for this process as it contains a genetically simple glycosylation system and decorates its flagellin with pseudaminic acid (Pse). The link between flagellin glycosylation and export has yet to be fully determined. We examined the role of glycosylation in the export and assembly process in a strain lacking Maf1, a protein involved in the transfer of Pse onto flagellin at the later stages of the glycosylation pathway. Immunoblotting, established that glycosylation is not required for flagellin export but is essential for filament assembly since non-glycosylated flagellin is still secreted. Maf1 interacts directly with its flagellin substrate in vivo, even in the absence of pseudaminic acid. Flagellin glycosylation in a flagellin chaperone mutant (flaJ) indicated that glycosylation occurs in the cytoplasm before chaperone binding and protein secretion. Preferential chaperone binding to glycosylated flagellin revealed its crucial role, indicating that this system has evolved to favour secretion of the polymerization competent glycosylated form.
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Affiliation(s)
- Jennifer L Parker
- Department of Infection and Immunity, University of Sheffield, Sheffield, S10 2RX, UK
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37
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Gram-negative flagella glycosylation. Int J Mol Sci 2014; 15:2840-57. [PMID: 24557579 PMCID: PMC3958885 DOI: 10.3390/ijms15022840] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 01/20/2014] [Accepted: 01/27/2014] [Indexed: 01/11/2023] Open
Abstract
Protein glycosylation had been considered as an eccentricity of a few bacteria. However, through advances in analytical methods and genome sequencing, it is now established that bacteria possess both N-linked and O-linked glycosylation pathways. Both glycosylation pathways can modify multiple proteins, flagellins from Archaea and Eubacteria being one of these. Flagella O-glycosylation has been demonstrated in many polar flagellins from Gram-negative bacteria and in only the Gram-positive genera Clostridium and Listeria. Furthermore, O-glycosylation has also been demonstrated in a limited number of lateral flagellins. In this work, we revised the current advances in flagellar glycosylation from Gram-negative bacteria, focusing on the structural diversity of glycans, the O-linked pathway and the biological function of flagella glycosylation.
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38
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Okuda J, Hanabusa A, Gotoh N. ExoS of Pseudomonas aeruginosa binds to a human KIF7 to induce cytotoxicity in cultured human bronchial epithelial cells. J Infect Chemother 2014; 20:121-7. [DOI: 10.1016/j.jiac.2013.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 09/09/2013] [Accepted: 09/13/2013] [Indexed: 12/13/2022]
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Abstract
Aeromonas species are inhabitants of aquatic environments and are able to cause disease in humans and fish among other animals. In aquaculture, they are responsible for the economically important diseases of furunculosis and motile Aeromonas septicaemia (MAS). Whereas gastroenteritis and wound infections are the major human diseases associated with the genus. As they inhabit and survive in diverse environments, aeromonads possess a wide range of colonisation factors. The motile species are able to swim in liquid environments through the action of a single polar flagellum, the flagellin subunits of which are glycosylated; although essential for function the biological role of glycan addition is yet to be determined. Approximately 60% of aeromonads possess a second lateral flagella system that is expressed in viscous environments for swarming over surfaces; both flagellar systems have been shown to be important in the initial colonisation of surfaces. Subsequently, other non-flagellar colonisation factors are employed; these can be both filamentous and non-filamentous. The aeromonads possess a number of fimbrial systems with the bundle-forming MSHA type IV pilus system, having a major role in human cell adherence. Furthermore, a series of outer-membrane proteins have also been implicated in the aeromonad adhesion process. A number of strains are also capable of cell invasion and that maybe linked with the more invasive diseases of bacteraemia or wound infections. These strains employ cell surface factors that allow the colonisation of these niches that protect them from the host's immune system such as S-layers, capsules or particular lipopolysaccharides.
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Affiliation(s)
- Rebecca Lowry
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom
| | - Sabela Balboa
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom; Departamento de Microbiología y Parasitología, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Jennifer L Parker
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom
| | - Jonathan G Shaw
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom.
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40
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N-glycosidase treatment with 18O labeling and de novo sequencing argues for flagellin FliC glycopolymorphism in Pseudomonas aeruginosa. Anal Bioanal Chem 2013; 405:9835-42. [PMID: 24220757 DOI: 10.1007/s00216-013-7424-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 09/27/2013] [Accepted: 10/07/2013] [Indexed: 10/26/2022]
Abstract
In prokaryote organisms, N-glycosylation of proteins is often correlated to cell-cell recognition and extracellular events. Those glycoproteins are potential targets for infection control. To date, many surface-glycosylated proteins from bacterial pathogens have been described. However, N-linked Pseudomonas surface-associated glycoproteins remain underexplored. We report a combined enrichment and labeling strategy to identify major glycoproteins on the outside of microorganisms. More precisely, bacteria were exposed to a mix of biotinylated lectins able to bind with glycoproteins. The latter were then recovered by avidin beads, digested with trypsin, and submitted to mass spectrometry. The targeted mixture of glycoproteins was additionally deglycosylated in the presence of H2(18)O to incorporate (18)O during PNGase F treatment and were also analyzed using mass spectrometry. This approach allowed us to identify a few tens of potential N-glycoproteins, among which flagellin FliC was the most abundant. To detect the possible sites of FliC modifications, a de novo sequencing step was also performed to discriminate between spontaneous deamidation and N-glycan loss. This approach led to the proposal of three potential N-glycosylated sites on the primary sequence of FliC: N26, N69, and N439, with two of these three asparagines belonging to an N-X-(S/T) consensus sequence. These observations suggest that flagellin FliC is a heterogeneous protein mixture containing both O- and N-glycoforms.
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41
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Pseudomonas aeruginosa Recombinant Flagellin Induced Poly-Isotypic Humoral Immune Responses in the Balb/C Mice. Jundishapur J Microbiol 2013. [DOI: 10.5812/jjm.6760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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42
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Andonova M, Urumova V. Immune surveillance mechanisms of the skin against the stealth infection strategy of Pseudomonas aeruginosa—Review. Comp Immunol Microbiol Infect Dis 2013; 36:433-48. [DOI: 10.1016/j.cimid.2013.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 01/21/2013] [Accepted: 03/30/2013] [Indexed: 01/01/2023]
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43
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Iwashkiw JA, Vozza NF, Kinsella RL, Feldman MF. Pour some sugar on it: the expanding world of bacterial proteinO-linked glycosylation. Mol Microbiol 2013; 89:14-28. [DOI: 10.1111/mmi.12265] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2013] [Indexed: 11/26/2022]
Affiliation(s)
- Jeremy A. Iwashkiw
- Alberta Glycomics Centre; Department of Biological Sciences; University of Alberta; CW405 Biological Sciences Building; Edmonton; Alberta; Canada; T6G 2E9
| | - Nicolas F. Vozza
- Alberta Glycomics Centre; Department of Biological Sciences; University of Alberta; CW405 Biological Sciences Building; Edmonton; Alberta; Canada; T6G 2E9
| | - Rachel L. Kinsella
- Alberta Glycomics Centre; Department of Biological Sciences; University of Alberta; CW405 Biological Sciences Building; Edmonton; Alberta; Canada; T6G 2E9
| | - Mario F. Feldman
- Alberta Glycomics Centre; Department of Biological Sciences; University of Alberta; CW405 Biological Sciences Building; Edmonton; Alberta; Canada; T6G 2E9
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44
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Shirato K, Gao C, Ota F, Angata T, Shogomori H, Ohtsubo K, Yoshida K, Lepenies B, Taniguchi N. Flagellin/Toll-like receptor 5 response was specifically attenuated by keratan sulfate disaccharide via decreased EGFR phosphorylation in normal human bronchial epithelial cells. Biochem Biophys Res Commun 2013; 435:460-5. [PMID: 23680662 DOI: 10.1016/j.bbrc.2013.05.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 05/05/2013] [Indexed: 10/26/2022]
Abstract
Bacterial or viral infection of the airway plays a critical role in the pathogenesis and exacerbation of chronic obstructive pulmonary disease (COPD) which is expected to be the 3rd leading cause of death by 2020. The induction of inflammatory responses in immune cells as well as airway epithelial cells is observed in the disease process. There is thus a pressing need for the development of new therapeutics. Keratan sulfate (KS) is the major glycosaminoglycans (GAGs) of airway secretions, and is synthesized by epithelial cells on the airway surface. Here we report that a KS disaccharide, [SO3(-)-6]Galβ1-4[SO3(-)-6]GlcNAc, designated as L4, suppressed the production of Interleukin-8 (IL-8) stimulated by flagellin, a Toll-like receptor (TLR) 5 agonist, in normal human bronchial epithelial (NHBE) cells. Such suppressions were not observed by other L4 analogues, N-acetyllactosamine or chondroitin-6-sulfate disaccharide. Moreover, treatment of NHBE cells with L4 inhibited the flagellin-stimulated phosphorylation of epidermal growth factor receptor (EGFR), the down stream signaling pathway of TLRs in NHBE cells. These results suggest that L4 specifically blocks the interaction of flagellin with TLR5 and subsequently suppresses IL-8 production in NHBE cells. Taken together, L4 represents a potential molecule for prevention and treatment of airway inflammatory responses to bacteria infections, which play a critical role in exacerbation of COPD.
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Affiliation(s)
- Ken Shirato
- Systems Glycobiology Research Group, RIKEN-Max Planck Joint Research Center, RIKEN Global Research Cluster, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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45
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Settem RP, Honma K, Nakajima T, Phansopa C, Roy S, Stafford GP, Sharma A. A bacterial glycan core linked to surface (S)-layer proteins modulates host immunity through Th17 suppression. Mucosal Immunol 2013; 6:415-26. [PMID: 22968422 PMCID: PMC4049606 DOI: 10.1038/mi.2012.85] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Tannerella forsythia is a pathogen implicated in periodontitis, an inflammatory disease of the tooth-supporting tissues often leading to tooth loss. This key periodontal pathogen is decorated with a unique glycan core O-glycosidically linked to the bacterium's proteinaceous surface (S)-layer lattice and other glycoproteins. Herein, we show that the terminal motif of this glycan core acts to modulate dendritic cell effector functions to suppress T-helper (Th)17 responses. In contrast to the wild-type bacterial strain, infection with a mutant strain lacking the complete S-layer glycan core induced robust Th17 and reduced periodontal bone loss in mice. Our findings demonstrate that surface glycosylation of this pathogen may act to ensure its persistence in the host likely through suppression of Th17 responses. In addition, our data suggest that the bacterium then induces the Toll-like receptor 2-Th2 inflammatory axis that has previously been shown to cause bone destruction. Our study provides a biological basis for pathogenesis and opens opportunities in exploiting bacterial glycans as therapeutic targets against periodontitis and a range of other infectious diseases.
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Affiliation(s)
- Rajendra P. Settem
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
| | - Kiyonobu Honma
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
| | - Takuma Nakajima
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
| | - Chatchawal Phansopa
- Oral and Maxillofacial Pathology, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield S10 2TA, UK
| | - Sumita Roy
- Oral and Maxillofacial Pathology, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield S10 2TA, UK
| | - Graham P. Stafford
- Oral and Maxillofacial Pathology, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield S10 2TA, UK
| | - Ashu Sharma
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
,Correspondence: Tel: (716) 829-2759; Fax: (716) 829-3942
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46
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Leonori D, Seeberger PH. De novo synthesis of D- and L-fucosamine containing disaccharides. Beilstein J Org Chem 2013; 9:332-41. [PMID: 23503315 PMCID: PMC3596053 DOI: 10.3762/bjoc.9.38] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Accepted: 01/16/2013] [Indexed: 12/27/2022] Open
Abstract
The availability of rare monosaccharides that cannot be isolated from natural sources is currently limiting the access to the synthesis and the biological evaluation of complex bacterial cell-surface glycans. Here, we report the synthesis of D- and L-fucosamine building blocks by a de novo approach from L- and D-Garner aldehydes. These differentially protected monosaccharide building blocks were utilized to prepare disaccharides present on the surface of Pseudomonas aeruginosa bacteria.
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Affiliation(s)
- Daniele Leonori
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
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Abstract
The varied landscape of the adaptive immune response is determined by the peptides presented by immune cells, derived from viral or microbial pathogens or cancerous cells. The study of immune biomarkers or antigens is not new and classical methods such as agglutination, enzyme-linked immunosorbent assay, or Western blotting have been used for many years to study the immune response to vaccination or disease. However, in many of these traditional techniques, protein or peptide identification has often been the bottleneck. Recent advances in genomics and proteomics, has led to many of the rapid advances in proteomics approaches. Immunoproteomics describes a rapidly growing collection of approaches that have the common goal of identifying and measuring antigenic peptides or proteins. This includes gel based, array based, mass spectrometry, DNA based, or in silico approaches. Immunoproteomics is yielding an understanding of disease and disease progression, vaccine candidates, and biomarkers. This review gives an overview of immunoproteomics and closely related technologies that are used to define the full set of antigens targeted by the immune system during disease.
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Affiliation(s)
- Kelly M Fulton
- Human Health Therapeutics, National Research Council Canada, Ottawa, ON, Canada
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Li N, Quidgley MC, Kobeissy FH, Joseph J, Neu J. Microbial cell components induced tolerance to flagellin-stimulated inflammation through Toll-like receptor pathways in intestinal epithelial cells. Cytokine 2012; 60:806-11. [PMID: 22944462 PMCID: PMC3572906 DOI: 10.1016/j.cyto.2012.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 06/29/2012] [Accepted: 08/06/2012] [Indexed: 01/01/2023]
Abstract
In the intestine, bacterial components activate innate responses that protect the host. We hypothesize that bacterial components reduce Interleukin-8 (IL-8) production in intestinal epithelial cells stimulated by flagellin via the Toll-like receptor (TLR) signaling pathway. Caco-2 cells were pretreated with various doses of lipopolysaccharide (LPS), lipoteichoic acid (LTA), or low-dose flagellin (LDFL) for 24h. Cells were then treated with flagellin (FL) 500 ng/ml (HDFL) for another 48 h. IL-8 production was measured in the cell culture medium by ELISA. Eighty-four genes in the TLR pathway were evaluated by RT Profiler PCR Array. Pathway Studio 8.0 software was used for altered pathway analysis. HDFL induced IL-8 production by 19-fold (p<0.01). Pretreatment with LDFL at 20, 10 or 1 ng/ml reduced HDFL-induced IL-8 production by 61%, 52% and 40%, respectively (p<0.05). LPS at 50 μg/ml decreased HDFL-induced IL-8 production by 38% (p<0.05). HDFL up-regulated CXCL10, IL1B, IL-8, IRAK2, NF-κB1 and I-κB (all p<0.05). Pathway Studio analysis showed that HDFL induced cell processes including inflammation, cell death and apoptosis. Pretreatment with LDFL at 10 ng/ml down-regulated FADD, FOS, MAP4K4, MyD88, TLR2, TLR3 and TNFERSF1A compared to HDFL (all p<0.05). These down-regulated genes are integral for numerous cell functions including inflammatory response, cell death, apoptosis and infection. These results demonstrate that LPS and LDFL provoke tolerance to HDFL-induced IL-8 production. This tolerance effect was accompanied by a complex interaction of multiple genes related to inflammatory as well as other responses in the TLR pathway rather than a single gene alteration.
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Affiliation(s)
- Nan Li
- Department of Pediatrics, University of Florida, 1600 SW Archer Road, Gainesville FL, USA 32610
| | - Maria C. Quidgley
- Department of Pediatrics, University of Florida, 1600 SW Archer Road, Gainesville FL, USA 32610
| | - Firas H. Kobeissy
- Department of Psychiatry, University of Florida, 1600 SW Archer Road, Gainesville FL, USA 32610
| | - Jessica Joseph
- Department of Pediatrics, University of Florida, 1600 SW Archer Road, Gainesville FL, USA 32610
| | - Josef Neu
- Department of Pediatrics, University of Florida, 1600 SW Archer Road, Gainesville FL, USA 32610
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49
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Inaba S, Hashimoto M, Jyot J, Aizawa SI. Exchangeability of the flagellin (FliC) and the cap protein (FliD) among different species in flagellar assembly. Biopolymers 2012; 99:63-72. [DOI: 10.1002/bip.22141] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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50
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Leonori D, Seeberger PH. De Novo Synthesis of the Bacterial 2-Amino-2,6-Dideoxy Sugar Building Blocks d-Fucosamine, d-Bacillosamine, and d-Xylo-6-deoxy-4-ketohexosamine. Org Lett 2012; 14:4954-7. [DOI: 10.1021/ol3023227] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniele Leonori
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany, and Institute for Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Peter H. Seeberger
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany, and Institute for Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
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