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Roh H, Kannimuthu D. Genomic and Transcriptomic Diversification of Flagellin Genes Provides Insight into Environmental Adaptation and Phylogeographic Characteristics in Aeromonas hydrophila. MICROBIAL ECOLOGY 2024; 87:65. [PMID: 38695873 PMCID: PMC11065939 DOI: 10.1007/s00248-024-02373-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 04/01/2024] [Indexed: 05/05/2024]
Abstract
Aeromonas hydrophila is an opportunistic motile pathogen with a broad host range, infecting both terrestrial and aquatic animals. Environmental and geographical conditions exert selective pressure on both geno- and phenotypes of pathogens. Flagellin, directly exposed to external environments and containing important immunogenic epitopes, may display significant variability in response to external conditions. In this study, we conducted a comparative analysis of ~ 150 A. hydrophila genomes, leading to the identification of six subunits of the flagellin gene (fla-1 to fla-4, flaA, and flaB). Individual strains harbored different composition of flagellin subunits and copies. The composition of subunits showed distinct patterns depending on environmental sources. Strains from aquatic environments were mainly comprised of fla-1 to fla-4 subunits, while terrestrial strains predominated in groups harboring flaA and flaB subunits. Each flagellin showed varying levels of expression, with flaA and flaB demonstrating significantly higher expression compared to others. One of the chemotaxis pathways that control flagellin movement through a two-component system was significantly upregulated in flaA(+ 1)/flaB(+ 1) group, whereas flaA and flaB showed different transcriptomic expressions. The genes positively correlated with flaA expression were relevant to biofilm formation and bacterial chemotaxis, but flaB showed a negative correlation with the genes in ABC transporters and quorum sensing pathway. However, the expression patterns of fla-2 to fla-4 were identical. This suggests various types of flagellin subunits may have different biological functions. The composition and expression levels of flagellin subunits could provide valuable insights into the adaptation of A. hydrophila and the differences among strains in response to various external environments.
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Affiliation(s)
- HyeongJin Roh
- Pathogen Transmission and Disease Research Group, Institute of Marine Research, PO Box 1870 Nordnes 5870, Bergen, Norway.
| | - Dhamotharan Kannimuthu
- Pathogen Transmission and Disease Research Group, Institute of Marine Research, PO Box 1870 Nordnes 5870, Bergen, Norway
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Wang J, Feng J, Jia W, Yuan T, He X, Wu Q, Peng F, Gao W, Yang Z, Tao Y, Li Q. Genomic and phenotypic analysis of a novel clinical isolate of Corynebacterium pyruviciproducens. BMC Microbiol 2023; 23:385. [PMID: 38053056 DOI: 10.1186/s12866-023-03075-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/18/2023] [Indexed: 12/07/2023] Open
Abstract
BACKGROUND Corynebacterium pyruviciproducens is a recently described species of Corynebacterium. There are few reports on the microbiological characteristics of the new species, and there is a lack of reports on the genomic analysis of the species. RESULTS This study involved a clinical isolate from the pus of a hospital patient with sebaceous gland abscesses. The clinically isolated strain was identified as C. pyruviciproducens strain WYJY-01. In this study, referring to Koch's postulates, we observed the pathological changes of animal models infected by intraperitoneal injection and subcutaneous injection of pure culture of the strain WYJY-01. Furthermore, the strain WYJY-01 was isolated and cultured again from animal models' subcutaneous abscess drainage fluid. Subsequently, the genomics of the strain WYJY-01 was analyzed. By comparing various gene databases, this study predicted the core secondary metabolite gene cluster of the strain WYJY-01, virulence factor genes carried by prophage, pathogenicity islands, and resistance islands. In addition, the genomes of C. pyruviciproducens strain WYJY-01, ATCC BAA-1742 T, and UMB0763 were analyzed by comparative genomics, and the differential genes of strain WYJY-01 were compared, and their functions were analyzed. CONCLUSION The findings showed that the strain WYJY-01 had pathogenicity, supplementing the phenotype characteristics of C. pyruviciproducens. Meanwhile, this research revealed the possible molecular mechanism of the pathogenicity of the strain WYJY-01 at the gene level through whole genome sequence analysis, providing a molecular basis for further research.
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Affiliation(s)
- Jiaqi Wang
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, PR China
- Engineering Research Institute of Precision Medicine Innovation and Transformation of Infections Diseases, Weifang Medical University, Weifang, Shandong, 261053, PR China
| | - Jiajia Feng
- Clinical Laboratory, Weifang Maternal and Child Health Care Hospital, Weifang, Shandong, 261011, PR China
| | - Wei Jia
- Clinical Laboratory, Weifang People's Hospital, Weifang, Shandong, 261000, PR China
| | - Tingxun Yuan
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, PR China
- Engineering Research Institute of Precision Medicine Innovation and Transformation of Infections Diseases, Weifang Medical University, Weifang, Shandong, 261053, PR China
| | - Xinyu He
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, PR China
- Engineering Research Institute of Precision Medicine Innovation and Transformation of Infections Diseases, Weifang Medical University, Weifang, Shandong, 261053, PR China
| | - Qianqian Wu
- Clinical Laboratory, the Affiliated Hospital of Weifang Medical University, Weifang, 261031, PR China
| | - Fujun Peng
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - Wei Gao
- Key Lab for Immunology in Universities of Shandong Province, Weifang Medical University, Weifang, Shandong, 261053, PR China
| | - Zhongfa Yang
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - Yuanyong Tao
- Clinical Laboratory, the Affiliated Hospital of Weifang Medical University, Weifang, 261031, PR China.
| | - Qian Li
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, PR China.
- Engineering Research Institute of Precision Medicine Innovation and Transformation of Infections Diseases, Weifang Medical University, Weifang, Shandong, 261053, PR China.
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Gil-Marqués ML, Pachón J, Smani Y. iTRAQ-Based Quantitative Proteomic Analysis of Acinetobacter baumannii under Hypoxia and Normoxia Reveals the Role of OmpW as a Virulence Factor. Microbiol Spectr 2022; 10:e0232821. [PMID: 35234505 PMCID: PMC8941935 DOI: 10.1128/spectrum.02328-21] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/02/2022] [Indexed: 11/20/2022] Open
Abstract
Acinetobacter baumannii needs to adapt to hypoxia during infection. Understanding its proteome regulation during infection would allow us to determine new targets to develop novel treatments. iTRAQ proteomic analysis of A549 cell infection by the ATCC 17978 strain was performed. A total of 175 proteins were differentially expressed under hypoxia versus normoxia. We selected the hypoxia-downregulated protein OmpW to analyze its role as a virulence factor. The loss of OmpW decreased the adherence and invasion of A. baumannii in these host cells, without affecting its bacterial growth. Moreover, A549 cell viability with ΔOmpW infection was higher than that with the wild-type strain. ΔOmpW presented less biofilm formation. Finally, the minimum lethal dose required by the ΔOmpW mutant was higher than that of the wild-type strain in a murine peritoneal sepsis model, with lower bacterial loads in tissues and fluids. Therefore, OmpW seems to be a virulence factor necessary for A. baumannii pathogenesis. IMPORTANCE Acinetobacter baumannii causes infections that are very difficult to treat due to the high rate of resistance to most and sometimes all of the antimicrobials used in the clinical setting. There is an important need to develop new strategies to combat A. baumannii infections. One alternative could be blocking specific bacterial virulence factors that this pathogen needs to infect cells. Pathogens modulate their protein expression as a function of the environment, and several studies have reported that hypoxia occurs in a wide range of infections. Therefore, it would be interesting to determine the proteome of A. baumannii under hypoxia in order to find new virulence factors, such as the outer membrane protein OmpW, as potential targets for the design of novel therapies.
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Affiliation(s)
- María Luisa Gil-Marqués
- Unit of Infectious Diseases, Microbiology and Preventive Medicine, Virgen del Rocío University Hospital, Seville, Spain
- Institute of Biomedicine of Seville, IBiS, University Hospital Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain
| | - Jerónimo Pachón
- Institute of Biomedicine of Seville, IBiS, University Hospital Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain
- Department of Medicine, University of Seville, Sevilla, Spain
| | - Younes Smani
- Unit of Infectious Diseases, Microbiology and Preventive Medicine, Virgen del Rocío University Hospital, Seville, Spain
- Institute of Biomedicine of Seville, IBiS, University Hospital Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
- Department of Molecular Biology and Biochemical Engineering, Andalusian Center of Developmental Biology, CSIC, University of Pablo de Olavide, Seville, Spain
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Lange MD, Abernathy J, Shoemaker CA, Zhang D, Kirby A, Peatman E, Beck BH. Proteome analysis of virulent Aeromonas hydrophila reveals the upregulation of iron acquisition systems in the presence of a xenosiderophore. FEMS Microbiol Lett 2020; 367:5921178. [PMID: 33045069 DOI: 10.1093/femsle/fnaa169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 10/09/2020] [Indexed: 12/22/2022] Open
Abstract
The Gram-negative bacterium, Aeromonas hydrophila, has been responsible for extensive losses in the catfish industry for over a decade. Due to this impact, there are ongoing efforts to understand the basic mechanisms that contribute to virulent A. hydrophila (vAh) outbreaks. Recent challenge models demonstrated that vAh cultured in the presence of the iron chelating agent deferoxamine mesylate (DFO) were more virulent to channel catfish (Ictalurus punctatus). Interestingly, differential gene expression of select iron acquisition genes was unremarkable between DFO and non-DFO cultures, posing the question: why the increased virulence? The current work sought to evaluate growth characteristics and protein expression of vAh after the addition of DFO. A comparative proteome analysis revealed differentially expressed proteins among tryptic soy broth (TSB) and TSB + DFO treatments. Upregulated proteins identified among the TSB + DFO treatment were enriched for gene ontology groups including iron ion transport, siderophore transport and siderophore uptake transport, all iron acquisition pathways. Protein-protein interactions were also evaluated among the differentially expressed proteins and predicted that many of the upregulated iron acquisition proteins likely form functional physiological networks. The proteome analysis of the vAh reveals valuable information about the basic biological processes likely leading to increased virulence during iron restriction in this organism.
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Affiliation(s)
- Miles D Lange
- United States Department of Agriculture, Agricultural Research Service, Aquatic Animal Health Research Unit, 990 Wire Road, Auburn, AL, 36832 USA
| | - Jason Abernathy
- United States Department of Agriculture, Agricultural Research Service, Harry K. Dupree Stuttgart National Aquaculture Research Center, P.O. Box 1050, 2955 Hwy. 130 East, Stuttgart, AR, 72160 USA
| | - Craig A Shoemaker
- United States Department of Agriculture, Agricultural Research Service, Aquatic Animal Health Research Unit, 990 Wire Road, Auburn, AL, 36832 USA
| | - Dunhua Zhang
- United States Department of Agriculture, Agricultural Research Service, Aquatic Animal Health Research Unit, 990 Wire Road, Auburn, AL, 36832 USA
| | - Augustus Kirby
- School of Fisheries, Aquaculture, and Aquatic Sciences, Aquatic Genetics and Genomics, Auburn University, 203 Swingle Hall, Auburn, AL, 36849 USA
| | - Eric Peatman
- School of Fisheries, Aquaculture, and Aquatic Sciences, Aquatic Genetics and Genomics, Auburn University, 203 Swingle Hall, Auburn, AL, 36849 USA
| | - Benjamin H Beck
- United States Department of Agriculture, Agricultural Research Service, Aquatic Animal Health Research Unit, 990 Wire Road, Auburn, AL, 36832 USA
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Li W, Zhao Y, Yu J, Lin L, Ramanathan S, Wang G, Lin X, Pang H. TonB-Dependent Receptors Affect the Spontaneous Oxytetracycline Resistance Evolution in Aeromonas hydrophila. J Proteome Res 2020; 20:154-163. [PMID: 32911932 DOI: 10.1021/acs.jproteome.9b00708] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
It is well known that most microbial populations develop their intrinsic antibiotics resistance at low concentrations in antibiotics environments, but the factors influencing spontaneous resistance are still largely unknown. In this study, Aeromonas hydrophila strains with different resistance levels to oxytetracycline (OXY) were induced by sublethal antibiotic selection pressure, and differential expression of proteins was compared among them using iTRAQ-based quantitative proteomics. Our following bioinformatic analysis showed that energy metabolism-related proteins were downregulated, while several iron-related proteins were upregulated in high OXY-resistant strains. To further investigate the role of spontaneous OXY resistance evolution, four TonB-dependent receptor-coded genes were deleted, and their OXY susceptibility capabilities and antibiotic evolutionary assays were performed, respectively. Our results showed that the deletion of these genes did not affect the susceptibility to OXY, but showed different evolution rates in the spontaneous OXY evolution compared with wild-type strain, especially for AHA_0971 and AHA_4251. Therefore, this study indicates the important role of TonB-dependent receptor proteins during the bacterial antibiotics resistance evolution and may provide a new prophylactic strategy against the development of antibiotic resistance.
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Affiliation(s)
- Wanxin Li
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 510000, PR China.,Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Yiyang Zhao
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Jing Yu
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Ling Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Srinivasan Ramanathan
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Guibin Wang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China.,State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing 102206, PR China
| | - Xiangmin Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China.,Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Huanying Pang
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 510000, PR China.,Fisheries College, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang 524025, PR China
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Jiang C, Cheng Y, Cao H, Zhang B, Li J, Zhu L, Li Z, Zeng W, Li C, He Q. Effect of cAMP Receptor Protein Gene on Growth Characteristics and Stress Resistance of Haemophilus parasuis Serovar 5. Front Cell Infect Microbiol 2020; 10:19. [PMID: 32158699 PMCID: PMC7052058 DOI: 10.3389/fcimb.2020.00019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/14/2020] [Indexed: 01/19/2023] Open
Abstract
Haemophilus parasuis (HPS), a member of the family Pasteurellaceae, is a common bacteria in the upper respiratory tract of pigs but under certain circumstances can cause serious systemic disease (Glasser's disease) characterized by severe infection of the upper respiratory tract, fibrinous polyserositis, polyarthritis, and meningitis. cAMP receptor protein (CRP) is among the most important global regulators, playing a vital role in adapting to environmental changes during the process of bacterial infection. In order to investigate the function of the crp gene in the growth characteristics of H. parasuis serovar 5 (HPS5) and its ability to overcome adverse environmental stresses, a crp mutant strain (Δcrp) was constructed and verified. In this study, we found that the crp gene was involved in growth rate, biofilm formation, stress tolerance, serum resistance, and iron utilization. Compared with the wild type, both the growth rate of the crp mutant and its resistance to osmotic pressure decreased significantly. Similar phenomena were also found in biofilm formation and iron utilization. However, the resistance to heat shock and serum complement of the crp mutant were enhanced. This study aimed to reveal the function in growth characteristics and stress resistance of the crp gene in HPS5. Whether it relates to virulence requires additional in-depth research.
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Affiliation(s)
- Changsheng Jiang
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Yufang Cheng
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Hua Cao
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Bingzhou Zhang
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Jing Li
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Ling Zhu
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Zhonghua Li
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Wei Zeng
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Chang Li
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Qigai He
- State Key Laboratory of Agricultural Microbiology, College of Animal Sciences and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
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