1
|
Nasreen M, Ellis D, Hosmer J, Essilfie AT, Fantino E, Sly P, McEwan AG, Kappler U. The DmsABC S-oxide reductase is an essential component of a novel, hypochlorite-inducible system of extracellular stress defense in Haemophilus influenzae. Front Microbiol 2024; 15:1359513. [PMID: 38638903 PMCID: PMC11024254 DOI: 10.3389/fmicb.2024.1359513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 03/11/2024] [Indexed: 04/20/2024] Open
Abstract
Defenses against oxidative damage to cell components are essential for survival of bacterial pathogens during infection, and here we have uncovered that the DmsABC S-/N-oxide reductase is essential for virulence and in-host survival of the human-adapted pathogen, Haemophilus influenzae. In several different infection models, H. influenzae ΔdmsA strains showed reduced immunogenicity as well as lower levels of survival in contact with host cells. Expression of DmsABC was induced in the presence of hypochlorite and paraquat, closely linking this enzyme to defense against host-produced antimicrobials. In addition to methionine sulfoxide, DmsABC converted nicotinamide- and pyrimidine-N-oxide, precursors of NAD and pyrimidine for which H. influenzae is an auxotroph, at physiologically relevant concentrations, suggesting that these compounds could be natural substrates for DmsABC. Our data show that DmsABC forms part of a novel, periplasmic system for defense against host-induced S- and N-oxide stress that also comprises the functionally related MtsZ S-oxide reductase and the MsrAB peptide methionine sulfoxide reductase. All three enzymes are induced following exposure of the bacteria to hypochlorite. MsrAB is required for physical resistance to HOCl and protein repair. In contrast, DmsABC was required for intracellular colonization of host cells and, together with MtsZ, contributed to resistance to N-Chlorotaurine. Our work expands and redefines the physiological role of DmsABC and highlights the importance of different types of S-oxide reductases for bacterial virulence.
Collapse
Affiliation(s)
- Marufa Nasreen
- School of Chemistry and Molecular Biosciences, Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, QLD, Australia
| | - Daniel Ellis
- School of Chemistry and Molecular Biosciences, Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, QLD, Australia
| | - Jennifer Hosmer
- School of Chemistry and Molecular Biosciences, Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, QLD, Australia
| | | | | | - Peter Sly
- Child Health Research Centre, South Brisbane, QLD, Australia
| | - Alastair G. McEwan
- School of Chemistry and Molecular Biosciences, Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, QLD, Australia
| | - Ulrike Kappler
- School of Chemistry and Molecular Biosciences, Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, QLD, Australia
| |
Collapse
|
2
|
Yuan M, Ma M, Jiang H, Fan M, Sun Y, Zhou B, Feng X, Yang J, Su M, He X. Characterization of Serotypes and Molecular Drug Resistance Patterns of Haemophilus influenzae in Kunming Children. Pol J Microbiol 2023:pjm-2023-006. [PMID: 37144671 DOI: 10.33073/pjm-2023-006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 01/31/2023] [Indexed: 05/06/2023] Open
Abstract
The present study aimed to determine the capsular serotype distribution and antimicrobial drug resistance patterns of Haemophilus influenzae from children in the Kunming region of China. This information could guide policymakers in clinical treatment. In the present study, H. influenzae isolates were tested for their serotypes, antimicrobial susceptibility pattern, and presence of β-lactamases. One-hundred forty-eight H. influenzae strains isolated from children 0-2 years old were investigated for capsular types by glass slide agglutination and molecular methods, and biotyped by the biochemical reactions. The drug resistance-encoding genes TEM-1, ROB-1, and the ftsI gene mutations PBP3-3, and PBP3-BLN were detected with real-time quantitative polymerase chain reaction (qPCR). The prevalence of β-lactamase-producing strains (60.3%) was significantly higher (p < 0.05) than non-enzyme-producing strains. β-Lactamase-producing strains were multidrug resistant to various antibiotics such as ampicillin, tetracycline, sulfamethoxazole/trimethoprim, chloramphenicol, cefuroxime, and cefaclor. Among β-lactamase-producing strains, the detection rates of the TEM-1, PBP3-BLN, PBP3-s, and ROB-1 were 54.1%, 18.9%, 11.8%, and 6.9%, respectively. The biotyping results show that most H. influenzae strains were of type II and III. Non-typeable H. influenzae (NTHi) accounted for 89.3% of the strains. NTHi strains were the most prevalent in this region; most belonged to biological types II and III. β-Lactamase-positive ampi-cillin-resistant (BLPAR) strains were prevalent among H. influenzae isolates in this region.
Collapse
Affiliation(s)
- Mei Yuan
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Mingbiao Ma
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Hongchao Jiang
- 2Science and Education Section, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Mao Fan
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Ying Sun
- 3Epilepsy Center of Children, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Bailing Zhou
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Xingxing Feng
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Junyi Yang
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Min Su
- 1Department of Laboratory, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| | - Xiaoli He
- 4Institute of Pediatrics, Children's Hospital affiliated with Kunming Medical University, Kunming, China
| |
Collapse
|
3
|
Dynamic distribution of nasal microbial community in yaks (Bos grunniens) at different ages. Trop Anim Health Prod 2021; 53:555. [PMID: 34853935 DOI: 10.1007/s11250-021-02996-6] [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: 06/16/2021] [Accepted: 11/11/2021] [Indexed: 12/09/2022]
Abstract
The significance of microbial community structure has been extensively recognized due to its key roles in metabolism, immunity, and health maintenance. Importantly, increasing evidence indicated that the dynamic distribution of microbial community structure can be used for evaluating the health condition of host. Yaks (Bos grunniens), mainly inhabiting in high-altitude hypoxic environment, are characterized by excellent adaptability and strong resistance. Currently, it has been determined that yaks possessed the complicated gastrointestinal microbial ecosystem, whereas not much is known about the nasal microbial community structure of yaks. Therefore, this study was performed to compare and analyze the differences in nasal microbiota of yaks with different ages by high-throughput sequencing. In this study, a total of 487,168 and 486,498 high-quality sequences were achieved from YYG (1-month-old yaks) and AYG (1-year-old yaks), respectively. Additionally, 5,340 operational taxonomic units (OTUs) were identified and 657 OTUs were in common among all samples. Proteobacteria and Firmicutes were the two most predominant phyla in all samples. Moreover, Actinobacteria and Bacteroidetes were the tertiary dominant phyla in YYG and AYG, respectively. At the level of genus, Moraxella, Faucicola, and Mannheimia were the most preponderant bacterial genera in the young and adult yaks. As compared to the AYG, the proportions of Actinobacillus, Parabacteroides, and Haemophilus in the YYG were significantly increased, whereas the Rhizobacter was decreased. In conclusion, this study firstly compared and investigated the distribution of nasal microbiota in yaks with different ages. Results demonstrated that age was an important factor affecting the nasal microbiota. Moreover, the current study will provide a theoretical basis for the further study on the microbial community structure of yaks.
Collapse
|
4
|
Moons SJ, Rossing E, Heming JJA, Janssen MAC, van Scherpenzeel M, Lefeber DJ, de Jonge MI, Langereis JD, Boltje TJ. Structure-Activity Relationship of Fluorinated Sialic Acid Inhibitors for Bacterial Sialylation. Bioconjug Chem 2021; 32:1047-1051. [PMID: 34043338 PMCID: PMC8382218 DOI: 10.1021/acs.bioconjchem.1c00194] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/23/2021] [Indexed: 11/29/2022]
Abstract
Bacterial pathogens such as Nontypeable Haemophilus influenzae (NTHi) can evade the immune system by taking up and presenting host-derived sialic acids. Herein, we report a detailed structure-activity relationship of sialic acid-based inhibitors that prevent the transfer of host sialic acids to NTHi. We report the synthesis and biological evaluation of C-5, C-8, and C-9 derivatives of the parent compound 3-fluorosialic acid (SiaNFAc). Small modifications are tolerated at the C-5 and C-9 positions, while the C-8 position does not allow for modification. These structure-activity relationships define the chemical space available to develop selective bacterial sialylation inhibitors.
Collapse
Affiliation(s)
- Sam J. Moons
- Cluster
of Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen 6525 AJ, The Netherlands
| | - Emiel Rossing
- Cluster
of Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen 6525 AJ, The Netherlands
| | - Jurriaan J. A. Heming
- Cluster
of Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen 6525 AJ, The Netherlands
| | - Mathilde A. C.
H. Janssen
- Cluster
of Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen 6525 AJ, The Netherlands
| | - Monique van Scherpenzeel
- Translational
Metabolic Laboratory, Department of Neurology, Donders Center for
Brain Cognition and Behavior, Radboud University
Medical Center, Nijmegen 6525 GA, The Netherlands
| | - Dirk J. Lefeber
- Translational
Metabolic Laboratory, Department of Neurology, Donders Center for
Brain Cognition and Behavior, Radboud University
Medical Center, Nijmegen 6525 GA, The Netherlands
| | - Marien I. de Jonge
- Laboratory
of Medical Immunology, Radboud Center for Infectious Diseases, Radboud
Institute for Molecular Sciences, Radboud
University Medical Center, Nijmegen 6525 GA, The Netherlands
| | - Jeroen D. Langereis
- Laboratory
of Medical Immunology, Radboud Center for Infectious Diseases, Radboud
Institute for Molecular Sciences, Radboud
University Medical Center, Nijmegen 6525 GA, The Netherlands
| | - Thomas J. Boltje
- Cluster
of Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen 6525 AJ, The Netherlands
| |
Collapse
|
5
|
Peng Y, Yin S, Wang M. Extracellular vesicles of bacteria as potential targets for immune interventions. Hum Vaccin Immunother 2021; 17:897-903. [PMID: 32873124 DOI: 10.1080/21645515.2020.1799667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Bacterial infection is one of the most common and serious diseases. Extracellular vesicles (EVs) expressed by bacterial cells during infection and their biological functions have been a growing field in recent years. The study of the immune interaction mechanism between EVs and bacteria has become more significant. EVs are released into the extracellular microenvironment during bacterial infection. EVs carry various lipids, proteins, nucleic acids, and other substances of host bacteria and participate in various physiological and pathological processes. EV-based vaccines against bacterial infection are also being evaluated. This review focuses on the biological characteristics of EVs, the interaction between EVs and the host immune system, and the potential of EVs as new vaccines. A deeper understanding of the interaction between EVs and the immune system informs on the biological function and heterogeneity of EVs. This knowledge also can facilitate the development and application of EVs and their potential as vaccines.
Collapse
Affiliation(s)
- Yizhi Peng
- Department of Laboratory Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Sheng Yin
- Department of Laboratory Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Min Wang
- Department of Laboratory Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| |
Collapse
|