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Zhou J, Wu H, Wang H, Wu Z, Shi L, Tian S, Hou LA. Metagenomics reveals the resistance patterns of electrochemically treated erythromycin fermentation residue. J Environ Sci (China) 2025; 148:567-578. [PMID: 39095189 DOI: 10.1016/j.jes.2024.01.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/24/2024] [Accepted: 01/24/2024] [Indexed: 08/04/2024]
Abstract
Erythromycin fermentation residue (EFR) represents a typical hazardous waste produced by the microbial pharmaceutical industry. Although electrolysis is promising for EFR disposal, its microbial threats remain unclear. Herein, metagenomics was coupled with the random forest technique to decipher the antibiotic resistance patterns of electrochemically treated EFR. Results showed that 95.75% of erythromycin could be removed in 2 hr. Electrolysis temporarily influenced EFR microbiota, where the relative abundances of Proteobacteria and Actinobacteria increased, while those of Fusobacteria, Firmicutes, and Bacteroidetes decreased. A total of 505 antibiotic resistance gene (ARG) subtypes encoding resistance to 21 antibiotic types and 150 mobile genetic elements (MGEs), mainly including plasmid (72) and transposase (52) were assembled in EFR. Significant linear regression models were identified among microbial richness, ARG subtypes, and MGE numbers (r2=0.50-0.81, p< 0.001). Physicochemical factors of EFR (Total nitrogen, total organic carbon, protein, and humus) regulated ARG and MGE assembly (%IncMSE value = 5.14-14.85). The core ARG, MGE, and microbe sets (93.08%-99.85%) successfully explained 89.71%-92.92% of total ARG and MGE abundances. Specifically, gene aph(3')-I, transposase tnpA, and Mycolicibacterium were the primary drivers of the resistance dissemination system. This study also proposes efficient resistance mitigation measures, and provides recommendations for future management of antibiotic fermentation residue.
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Affiliation(s)
- Jieya Zhou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Hao Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Haiyan Wang
- Inner Mongolia Autonomous Region Solid Waste and Soil Ecological Environment Technology Center, Hohhot 010020, China
| | - Zongru Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Lihu Shi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Shulei Tian
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Li-An Hou
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; High Tech. Inst. Beijing, Beijing 100085, China.
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He J, Yang Z, Wang M, Jia R, Chen S, Liu M, Zhao X, Yang Q, Wu Y, Zhang S, Huang J, Ou X, Sun D, Tian B, He Y, Wu Z, Cheng A, Zhu D. Integrative and conjugative elements of Pasteurella multocida: Prevalence and signatures in population evolution. Virulence 2024; 15:2359467. [PMID: 38808732 PMCID: PMC11141479 DOI: 10.1080/21505594.2024.2359467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024] Open
Abstract
Pasteurella multocida (P. multocida) is a bacterial pathogen responsible for a range of infections in humans and various animal hosts, causing significant economic losses in farming. Integrative and conjugative elements (ICEs) are important horizontal gene transfer elements, potentially enabling host bacteria to enhance adaptability by acquiring multiple functional genes. However, the understanding of ICEs in P. multocida and their impact on the transmission of this pathogen remains limited. In this study, 42 poultry-sourced P. multocida genomes obtained by high-throughput sequencing together with 393 publicly available P. multocida genomes were used to analyse the horizontal transfer of ICEs. Eighty-two ICEs were identified in P. multocida, including SXT/R391 and Tn916 subtypes, as well as three subtypes of ICEHin1056 family, with the latter being widely prevalent in P. multocida and carrying multiple resistance genes. The correlations between insertion sequences and resistant genes in ICEs were also identified, and some ICEs introduced the carbapenem gene blaOXA-2 and the bleomycin gene bleO to P. multocida. Phylogenetic and collinearity analyses of these bioinformatics found that ICEs in P. multocida were transmitted vertically and horizontally and have evolved with host specialization. These findings provide insight into the transmission and evolution mode of ICEs in P. multocida and highlight the importance of understanding these elements for controlling the spread of antibiotic resistance.
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Affiliation(s)
- Jiao He
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Zhishuang Yang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Mingshu Wang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Renyong Jia
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Shun Chen
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Mafeng Liu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Xinxin Zhao
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Qiao Yang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Ying Wu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Shaqiu Zhang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Juan Huang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Xumin Ou
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Di Sun
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Bin Tian
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Yu He
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Zhen Wu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Anchun Cheng
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
| | - Dekang Zhu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
- Sicence and Technology Department of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
- International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Chengdu, Sichuan, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the People’s Republic of China, Chengdu, Sichuan, China
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Chen Z, Liu Y, Jiang L, Zhang C, Qian X, Gu J, Song Z. Bacterial outer membrane vesicles increase polymyxin resistance in Pseudomonas aeruginosa while inhibiting its quorum sensing. JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135588. [PMID: 39181004 DOI: 10.1016/j.jhazmat.2024.135588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Revised: 08/06/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024]
Abstract
The persistent emergence of multidrug-resistant bacterial pathogens is leading to a decline in the therapeutic efficacy of antibiotics, with Pseudomonas aeruginosa (P. aeruginosa) emerging as a notable threat. We investigated the antibiotic resistance and quorum sensing (QS) system of P. aeruginosa, with a particular focused on outer membrane vesicles (OMVs) and polymyxin B as the last line of antibiotic defense. Our findings indicate that OMVs increase the resistance of P. aeruginosa to polymyxin B. The overall gene transcription levels within P. aeruginosa also reveal that OMVs can reduce the efficacy of polymyxin B. However, both OMVs and sublethal concentrations of polymyxin B suppressed the transcription levels of genes associated with the QS system. Furthermore, OMVs and polymyxin B acted in concert on the QS system of P. aeruginosa to produce a more potent inhibitory effect. This suppression was evidenced by a decrease in the secretion of virulence factors, impaired bacterial motility, and a notable decline in the ability to form biofilms. These results reveal that OMVs enhance the resistance of P. aeruginosa to polymyxin B, yet they collaborate with polymyxin B to inhibit the QS system. Our research contribute to a deeper understanding of the resistance mechanisms of P. aeruginosa in the environment, and provide new insights into the reduction of bacterial infections caused by P. aeruginosa through the QS system.
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Affiliation(s)
- Zhihui Chen
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yucheng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lan Jiang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chao Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China
| | - Xun Qian
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jie Gu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Shaanxi Engineering Research Center of Utilization of Agricultural Waste Resources, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zilin Song
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Aggarwal M, Patra A, Awasthi I, George A, Gagneja S, Gupta V, Capalash N, Sharma P. Drug repurposing against antibiotic resistant bacterial pathogens. Eur J Med Chem 2024; 279:116833. [PMID: 39243454 DOI: 10.1016/j.ejmech.2024.116833] [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: 05/06/2024] [Revised: 08/22/2024] [Accepted: 09/01/2024] [Indexed: 09/09/2024]
Abstract
The growing prevalence of MDR and XDR bacterial pathogens is posing a critical threat to global health. Traditional antibiotic development paths have encountered significant challenges and are drying up thus necessitating innovative approaches. Drug repurposing, which involves identifying new therapeutic applications for existing drugs, offers a promising alternative to combat resistant pathogens. By leveraging pre-existing safety and efficacy data, drug repurposing accelerates the development of new antimicrobial therapy regimes. This review explores the potential of repurposing existing FDA approved drugs against the ESKAPE and other clinically relevant bacterial pathogens and delves into the identification of suitable drug candidates, their mechanisms of action, and the potential for combination therapies. It also describes clinical trials and patent protection of repurposed drugs, offering perspectives on this evolving realm of therapeutic interventions against drug resistance.
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Affiliation(s)
- Manya Aggarwal
- Departmen of Microbiology, Panjab University, Chandigarh, India
| | - Anushree Patra
- Departmen of Microbiology, Panjab University, Chandigarh, India
| | - Ishita Awasthi
- Departmen of Microbiology, Panjab University, Chandigarh, India
| | - Annu George
- Departmen of Microbiology, Panjab University, Chandigarh, India
| | - Simran Gagneja
- Departmen of Microbiology, Panjab University, Chandigarh, India
| | - Varsha Gupta
- Department of Microbiology, Government Multi-speciality hospital, Sector 16, Chandigarh, India
| | - Neena Capalash
- Department of Biotechnology, Panjab University, Chandigarh, India
| | - Prince Sharma
- Departmen of Microbiology, Panjab University, Chandigarh, India.
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Kim N, Ko SY, Park SY, Kim SY, Lee DE, Kwon KT, Kim YK, Lee JC. Clonal Distribution and Its Association With the Carbapenem Resistance Mechanisms of Carbapenem-Non-Susceptible Pseudomonas aeruginosa Isolates From Korean Hospitals. Ann Lab Med 2024; 44:410-417. [PMID: 38433574 PMCID: PMC11169769 DOI: 10.3343/alm.2023.0369] [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: 09/15/2023] [Revised: 11/09/2023] [Accepted: 02/12/2024] [Indexed: 03/05/2024] Open
Abstract
Background Carbapenem resistance in Pseudomonas aeruginosa is a serious global health problem. We investigated the clonal distribution and its association with the carbapenem resistance mechanisms of carbapenem-non-susceptible P. aeruginosa isolates from three Korean hospitals. Methods A total of 155 carbapenem-non-susceptible P. aeruginosa isolates collected between 2011 and 2019 were analyzed for sequence types (STs), antimicrobial susceptibility, and carbapenem resistance mechanisms, including carbapenemase production, the presence of resistance genes, OprD mutations, and the hyperproduction of AmpC β-lactamase. Results Sixty STs were identified in carbapenem-non-susceptible P. aeruginosa isolates. Two high-risk clones, ST235 (N=41) and ST111 (N=20), were predominant; however, sporadic STs were more prevalent than high-risk clones. The resistance rate to amikacin was the lowest (49.7%), whereas that to piperacillin was the highest (92.3%). Of the 155 carbapenem-non-susceptible isolates, 43 (27.7%) produced carbapenemases. Three metallo-β-lactamase (MBL) genes, blaIMP-6 (N=38), blaVIM-2 (N=3), and blaNDM-1 (N=2), were detected. blaIMP-6 was detected in clonal complex 235 isolates. Two ST773 isolates carried blaNDM-1 and rmtB. Frameshift mutations in oprD were identified in all isolates tested, regardless of the presence of MBL genes. Hyperproduction of AmpC was detected in MBL gene-negative isolates. Conclusions Frameshift mutations in oprD combined with MBL production or hyperproduction of AmpC are responsible for carbapenem resistance in P. aeruginosa. Further attention is required to curb the emergence and spread of new carbapenem-resistant P. aeruginosa clones.
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Affiliation(s)
- Nayeong Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Seo Yeon Ko
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Seong Yong Park
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Seong Yeob Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Da Eun Lee
- Kyungpook National University Hospital National Culture Collection for Pathogens (KNUH-NCCP), Kyungpook National University Hospital, Daegu, Korea
| | - Ki Tae Kwon
- Kyungpook National University Hospital National Culture Collection for Pathogens (KNUH-NCCP), Kyungpook National University Hospital, Daegu, Korea
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Yu Kyung Kim
- Kyungpook National University Hospital National Culture Collection for Pathogens (KNUH-NCCP), Kyungpook National University Hospital, Daegu, Korea
- Department of Laboratory Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Je Chul Lee
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu, Korea
- Kyungpook National University Hospital National Culture Collection for Pathogens (KNUH-NCCP), Kyungpook National University Hospital, Daegu, Korea
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6
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Wu Q, Li W, Kwok LY, Lv H, Sun J, Sun Z. Regional variation and adaptive evolution in Bifidobacterium pseudocatenulatum: Insights into genomic and functional diversity in human gut. Food Res Int 2024; 192:114840. [PMID: 39147525 DOI: 10.1016/j.foodres.2024.114840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 07/16/2024] [Accepted: 07/26/2024] [Indexed: 08/17/2024]
Abstract
Bifidobacterium pseudocatenulatum is a prevalent gut microbe in humans of all ages and plays a crucial role in host health. However, its adaptive evolutionary characteristics remain poorly understood. This study analyzed the genome of 247 B. pseudocatenulatum isolates from Chinese, Vietnamese, Japanese and other region populations using population genomics and functional genomics. Our findings revealed high genetic heterogeneity and regional clustering within B. pseudocatenulatum isolates. Significant differences were observed in genome characteristics, phylogeny, and functional genes. Specifically, Chinese and Vietnamese isolates exhibited a higher abundance of genes involved in the metabolism of plant-derived carbohydrates (GH13, GH43, and GH5 enzyme families), aligning with the predominantly vegetable-, wheat- and fruit-based diets of these populations. Additionally, we found widespread transmission of antibiotic resistance genes (tetO and tetW) through mobile genetic elements, such as genomic islands (GIs), resulting in substantial intra-regional differences. Our findings highlight distinct adaptive evolution in B. pseudocatenulatum driven by gene specialization, possibly in response to regional variations in diet and lifestyle. This study sheds light on bifidobacteria colonization mechanisms in the host gut. IMPORTANCE: Gut microbiota, as a key link in the gut-brain axis, helps to maintain the health of the organism, among which, Bifidobacterium pseudocatenulatum (B. pseudocatenulatum) is an important constituent member of the gut microbiota, which plays an important role in maintaining the balance of gut microbiota. The probiotic properties of B. pseudocatenulatum have been widely elaborated, and in order to excavate its evolutionary features at the genomic level, here we focused on the genetic background and evolutionary mechanism of the B. pseudocatenulatum genomes isolated from the intestinal tracts of different populations. Ultimately, based on the phylogenetic tree, we found that B. pseudocatenulatum has high genetic diversity and regional clustering phenomenon, in which plant-derived carbohydrate metabolism genes (GH13, GH43, GH5) showed significant regional differences, and this genetic differentiation drove the adaptive evolution, which likely shaped by diet and lifestyle.
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Affiliation(s)
- Qiong Wu
- Key Laboratory of Dairy Biotechnology and Engineering (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot, PR China; Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Weicheng Li
- Key Laboratory of Dairy Biotechnology and Engineering (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot, PR China; Collaborative Innovative Center for Lactic Acid Bacteria and Fermented Dairy Products, Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Lai-Yu Kwok
- Key Laboratory of Dairy Biotechnology and Engineering (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot, PR China; Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Huimin Lv
- Key Laboratory of Dairy Biotechnology and Engineering (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot, PR China; Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Jiaqi Sun
- Key Laboratory of Dairy Biotechnology and Engineering (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot, PR China; Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot, PR China
| | - Zhihong Sun
- Key Laboratory of Dairy Biotechnology and Engineering (IMAU), Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China; Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot, PR China; Collaborative Innovative Center for Lactic Acid Bacteria and Fermented Dairy Products, Ministry of Education, Inner Mongolia Agricultural University, Hohhot, PR China.
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7
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Wang Y, Li X, Li A, Chen C, Fang J, Luo N, Tian S, Chen L, Wu X, Song X, Tan J, Zhang Y, Zhu Q, Li Y, Xiong Y, Pei H, Xia Q. The genetic diversity and evolution analysis of the Hainan melioidosis outbreak strains. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2024; 123:105654. [PMID: 39111344 DOI: 10.1016/j.meegid.2024.105654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 08/02/2024] [Accepted: 08/02/2024] [Indexed: 08/10/2024]
Abstract
Melioidosis is a zoonotic disease, with its outbreaks being rare and indicative of an unusual concurrence of extreme climate and natural environmental factors. An outbreak of melioidosis cases emerged in Hainan following Typhoon "Dianmu" from October to December 2021, presenting an opportunity to identify the environmental sources of infection for these cases due to its nature as a well-defined point-source cluster. To investigate the relationship between the occurrence of these melioidosis cases and the environment, we extracted the entire genome of 25 clinical strains and conducted MLST typing, followed by whole genome sequencing and analysis of molecular genetic information for four ST46 genotypes from these strains. Phylogenetic and evolutionary relationships between Hainan sequence types (STs) and those found in other endemic regions were analyzed using IslandPath-DIMO, PHASTER, e-BURST, PHYLOViZ, and the maximum likelihood method. Notably, a total of 25 clinical strains were identified, encompassing 12 STs (ST46, ST1105, ST1991, ST30, ST1992, ST50, ST164, ST55, ST70, ST1993, ST1545, and ST58), with ST1991, ST1992, and ST1993 being newly discovered subtypes. PHYLOViZ clustering analysis divided the strains into two groups (A and B), both closely related to the Asian region. Phylogenetic tree analysis further revealed that most of the strains in this study were closely related to those found in Australia and Thailand. Analysis of patient information and visits to their residences suggested that contaminated water sources might be the primary source of infection during this outbreak. Our findings underscore that extreme weather events, such as typhoons, significantly increase the infection rate of B. pseudomallei, along with its genetic diversity, necessitating additional prevention strategies to control these B. pseudomallei infections.
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Affiliation(s)
- Yanshuang Wang
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China; The Second Affiliated Hospital, Hainan Medical University, Haikou, Hainan, China
| | - Xuemiao Li
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Anyang Li
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Chen Chen
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China; Medical Laboratory Department, Traditional Chinese Medicine Hospital of Yaan, Sichuan, China
| | - Junde Fang
- The First Clinical College, Hainan Medical University, Haikou, China
| | - Nini Luo
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Shen Tian
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Lin Chen
- The Second Affiliated Hospital, Hainan Medical University, Haikou, Hainan, China
| | - Xingyong Wu
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Xinyi Song
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Jun Tan
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Yue Zhang
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Qiao Zhu
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Yanmei Li
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China
| | - Yu Xiong
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China.
| | - Hua Pei
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China; The Second Affiliated Hospital, Hainan Medical University, Haikou, Hainan, China.
| | - Qianfeng Xia
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine, Hainan Medical University, Haikou, Hainan 571199, China.
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Opazo-Capurro A, Aguilar-Vera OA, González-Muñoz P, Amsteins-Romero L, Quiroga M, Encina A, Herrera-Chávez N, Quezada-Aguiluz M, Aguayo-Reyes A, Morales-León F, Illesca V, Vera R, Salgado F, Suazo P, Fuenzalida LM, Bello-Toledo H, Castillo-Ramírez S, González-Rocha G. Genomic and Phylogenomic Characterization of Carbapenem-resistant Pseudomonas aeruginosa 'High-risk' Clone O4/ExoS+/ST654 Circulating in Chilean Hospitals. J Glob Antimicrob Resist 2024; 38:205-211. [PMID: 38849115 DOI: 10.1016/j.jgar.2024.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 04/22/2024] [Accepted: 05/23/2024] [Indexed: 06/09/2024] Open
Abstract
INTRODUCTION Carbapenem-resistant Pseudomonas aeruginosa (CRPA) is a serious threat to public health. Globally, carbapenemases-producing CRPA isolates mainly belong to 'high-risk' clones; however, the molecular epidemiology of CRPA isolates circulating in Chile are scarce, where this pathogen is the main aetiological agent of ventilator-associated pneumonia. OBJECTIVES To characterize the phylogenomics and molecular features of ST654 CRPA isolates collected in Chile between 2016 and 2022. METHODS Eighty-nine CRPA isolates collected in different Chilean hospitals from clinical specimens between 2005 and 2022 were analysed. Antibiotic susceptibility tests and carbapenemases production were carried out on the CRPA ST654 isolates. Also, they were subjected to whole-genome sequencing, from which in silico analyses were performed. RESULTS Thirty-four strains (38.2%) belonged to the ST654 high-risk clone, being the most predominant lineage of the collection. Most of these isolates belonged to a subclade including KPC producers that also clustered with strains from Argentina and the United States, whereas few VIM and NDM co-producers clustered in two different smaller subclades. The isolates exhibited a broad resistome encompassing genes mediating resistance to several other clinically relevant drugs. Additionally, all the 34 ST654 isolates were ExoS+ as a virulence factor and associated to the O4-serotype. CONCLUSIONS Our report represents the most comprehensive phylogenomic study of a CRPA high-risk clone ST654 to date. Our analyses suggest that this lineage is undergoing a divergent evolutionary path in Chile, because most of the isolates were KPC producers and were O4 serotype, differing from previous descriptions, which underline the relevance of performing molecular surveillance on this pathogen.
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Affiliation(s)
- Andrés Opazo-Capurro
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile
| | - Omar Alejandro Aguilar-Vera
- Programa de Genómica Evolutiva, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, México
| | - Paulina González-Muñoz
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile; Departamento de Ciencias Biológicas y Químicas, Facultad de Medicina y Ciencia, Universidad San Sebastián, Concepción, Chile
| | - Luis Amsteins-Romero
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile
| | - Monserrat Quiroga
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Antonia Encina
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Néstor Herrera-Chávez
- Laboratorio de Microbiología, Hospital Regional Guillermo Grant Benavente, Concepción, Chile
| | - Mario Quezada-Aguiluz
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile; Grupo de Estudio de Enfermedades Infecciosas de la Universidad de Concepción (GrEEn-UdeC), Departamento de Medicina Interna, Facultad de Medicina, Universidad de Concepción, Concepción, Chile
| | - Alejandro Aguayo-Reyes
- Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile; Grupo de Estudio de Enfermedades Infecciosas de la Universidad de Concepción (GrEEn-UdeC), Departamento de Medicina Interna, Facultad de Medicina, Universidad de Concepción, Concepción, Chile
| | - Felipe Morales-León
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile; Departamento de Farmacia, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile
| | - Vijna Illesca
- Hospital Hernán Henríquez Aravena, Laboratorio Clínico, Temuco, Chile
| | - Rodrigo Vera
- Hospital de Urgencia Asistencia Pública, Santiago de Chile, Chile
| | | | | | | | - Helia Bello-Toledo
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile
| | - Santiago Castillo-Ramírez
- Programa de Genómica Evolutiva, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, México
| | - Gerardo González-Rocha
- Laboratorio de Investigación en Agentes Antibacterianos (LIAA), Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile; Grupo de Estudio en Resistencia Antimicrobiana (GRAM), Universidad de Concepción, Concepción, Chile.
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9
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Rickard H, Cloutman-Green E, Ciric L. A microbiological survey approach to understanding the virulence factors of Pseudomonas species in healthcare sinks. J Hosp Infect 2024; 151:84-91. [PMID: 38992838 DOI: 10.1016/j.jhin.2024.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 06/04/2024] [Accepted: 06/06/2024] [Indexed: 07/13/2024]
Abstract
BACKGROUND Hospital water is involved in both the prevention and spread of healthcare-associated infections (HCAIs). Handwashing is key to reducing the transmission of pathogens, yet numerous outbreaks have been found to be caused by organisms within sinks, taps and showers. Pseudomonas aeruginosa and increasingly non-aeruginosa Pseudomonas cause waterborne HCAI, however, little is known about the virulence potential of Pseudomonas species found within hospital environments. METHODS Swabs were taken from 62 sinks within two newly opened wards at Great Ormond Street Hospital, samples were taken before and after the wards opened to understand the impact of patient occupancy on sink micro-organisms. Culturable bacteria were identified by MALDI-TOF and virulence factors assessed through phenotypic methods. RESULTS A total of 106 bacterial isolates were recovered including 24 Pseudomonas isolates. Of these 25% were identified as P. oleovorans, 21% P. aeruginosa, 17% P. composti, 13% P. alicalipha, 8% P. monteilii, 4% P. putida, 4% P. stutzeri and 8% could only be identified to genus level by MALDI-TOF. Differences were seen in both the number of Pseudomonas isolates and virulence production between the two wards, overall 25% of the Pseudomonas isolates produced pigment, 58% were capable of haemolysis, 87.5% were able to swim, 83.3% were capable of twitching motility, 33.3% produced alkaline protease and 8.3% produced gelatinase. CONCLUSIONS Results suggest that patients may be back-contaminating sinks with colonizing organisms which has ongoing implications for infection prevention and control. Additionally, this work highlights the ability of non-aeruginosa Pseudomonas to produce virulence factors traditionally associated with P. aeruginosa.
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Affiliation(s)
- H Rickard
- Healthy Infrastructure Research Group, Department of Civil, Environmental and Geomatic Engineering, University College London, London, UK.
| | - E Cloutman-Green
- Healthy Infrastructure Research Group, Department of Civil, Environmental and Geomatic Engineering, University College London, London, UK; Camelia Botnar Laboratories, Department of Microbiology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - L Ciric
- Healthy Infrastructure Research Group, Department of Civil, Environmental and Geomatic Engineering, University College London, London, UK
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Sher EK, Džidić-Krivić A, Sesar A, Farhat EK, Čeliković A, Beća-Zećo M, Pinjic E, Sher F. Current state and novel outlook on prevention and treatment of rising antibiotic resistance in urinary tract infections. Pharmacol Ther 2024; 261:108688. [PMID: 38972453 DOI: 10.1016/j.pharmthera.2024.108688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/16/2024] [Accepted: 07/04/2024] [Indexed: 07/09/2024]
Abstract
Antibiotic-resistant bacteria are currently an important public health concern posing a serious threat due to their resistance to the current arsenal of antibiotics. Uropathogens Escherichia coli (UPEC), Proteus mirabilis, Klebsiella pneumoniae and Enterococcus faecalis, antibiotic-resistant gram-negative bacteria, cause serious cases of prolonged UTIs, increasing healthcare costs and potentially even leading to the death of an affected patient. This review discusses current knowledge about the increasing resistance to currently recommended antibiotics for UTI therapy, as well as novel therapeutic options. Traditional antibiotics are still a part of the therapy guidelines for UTIs, although they are often not effective and have serious side effects. Hence, novel drugs are being developed, such as combinations of β-lactam antibiotics with cephalosporins and carbapenems. Siderophoric cephalosporins, such as cefiderocol, have shown potential in the treatment of individuals with significant gram-negative bacterial infections, as well as aminoglycosides, fluoroquinolones and tetracyclines that are also undergoing clinical trials. The use of cranberry and probiotics is another potential curative and preventive method that has shown antimicrobial and anti-inflammatory effects. However, further studies are needed to assess the efficacy and safety of probiotics containing cranberry extract for UTI prevention and treatment. An emerging novel approach for UTI treatment is the use of immuno-prophylactic vaccines, as well as different nanotechnology solutions such as nanoparticles (NP). NP have the potential to be used as delivery systems for drugs to specific targets. Furthermore, nanotechnology could enable the development of nano antibiotics with improved features by the application of different NPs in their structure, such as gold and copper NPs. However, further high-quality research is required for the synthesis and testing of these novel molecules, such as safety evaluation and pharmacovigilance.
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Affiliation(s)
- Emina K Sher
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom.
| | - Amina Džidić-Krivić
- Department of Neurology, Cantonal Hospital Zenica, Zenica 72000, Bosnia and Herzegovina; International Society of Engineering Science and Technology, Nottingham, United Kingdom
| | - Ana Sesar
- International Society of Engineering Science and Technology, Nottingham, United Kingdom; Faculty of Health Studies, Victoria International University, Mostar 88000, Bosnia and Herzegovina
| | - Esma K Farhat
- International Society of Engineering Science and Technology, Nottingham, United Kingdom; Faculty of Food Technology, Josip Juraj Strossmayer University of Osijek, Croatia
| | - Amila Čeliković
- International Society of Engineering Science and Technology, Nottingham, United Kingdom; Faculty of Medicine, University of Zenica, Zenica 71000, Bosnia and Herzegovina
| | - Merima Beća-Zećo
- International Society of Engineering Science and Technology, Nottingham, United Kingdom; Faculty of Health Studies, Victoria International University, Mostar 88000, Bosnia and Herzegovina
| | - Emma Pinjic
- Department of Radiology, Beth Israel Deaconess Medical Center (BIDMC), Boston, MA, United States
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom.
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Khachab Y, El Shamieh S, Sokhn ES. Gram-negative bacterial colonization in the gut: Isolation, characterization, and identification of resistance mechanisms. J Infect Public Health 2024; 17:102535. [PMID: 39216133 DOI: 10.1016/j.jiph.2024.102535] [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: 06/04/2024] [Revised: 08/07/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND The gut microbiome is made up of a diverse range of bacteria, especially gram-negative bacteria, and is crucial for human health and illness. There is a great deal of interest in the dynamic interactions between gram-negative bacteria and their host environment, especially considering antibiotic resistance. This work aims to isolate gram-negative bacteria that exist in the gut, identify their species, and use resistance-associated gene analysis to define their resistance mechanisms. METHODS Samples were collected from all patients who had a stool culture at a tertiary care center in Lebanon. Each type of bacteria that was identified from the stool samples was subjected to critical evaluations, and all discovered strains underwent antimicrobial susceptibility testing. Polymerase chain reaction was used to profile the genes for Carbapenem-resistant Enterobacteriaceae (CRE), Extended-spectrum beta-lactamase (ESBL), and that of Pseudomonas aeruginosa strains. RESULTS Escherichia coli, Klebsiella species, and Pseudomonas aeruginosa turned out to be the predominant microbiota members. Escherichia coli strains had a high frequency of extended-spectrum beta-lactamase genes, with the most discovered gene being bla CTX-M. Additionally, a considerable percentage of isolates had carbapenemase-resistant Enterobacteriaceae genes, suggesting the rise of multidrug-resistant strains. Multidrug resistance genes, such as bla mexR, bla mexB, and bla mexA, were found in strains of Pseudomonas aeruginosa, highlighting the possible difficulties in treating infections brought on by these bacteria. CONCLUSION The findings highlight the critical importance of effective surveillance and response measures to maintain the effectiveness of antibiotics considering the introduction of multidrug resistance genes in Pseudomonas aeruginosa and ESBL and CRE genes in Escherichia coli.
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Affiliation(s)
- Yara Khachab
- Molecular Testing Laboratory, Department of Medical Laboratory Technology, Faculty of Health Sciences, Beirut Arab University, P.O. Box 11-5020, Beirut, Lebanon
| | - Said El Shamieh
- Molecular Testing Laboratory, Department of Medical Laboratory Technology, Faculty of Health Sciences, Beirut Arab University, P.O. Box 11-5020, Beirut, Lebanon
| | - Elie Salem Sokhn
- Molecular Testing Laboratory, Department of Medical Laboratory Technology, Faculty of Health Sciences, Beirut Arab University, P.O. Box 11-5020, Beirut, Lebanon.
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Mooney R, Richardson K, Rodgers K, Giammarini E, Williams R, Kelly S, Amaeze N, Inkster T, Henriquez FL, Mackay W. Acanthamoeba as a protective reservoir for Pseudomonas aeruginosa in a clinical environment. J Hosp Infect 2024:S0195-6701(24)00291-3. [PMID: 39218354 DOI: 10.1016/j.jhin.2024.08.010] [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: 05/09/2024] [Revised: 08/12/2024] [Accepted: 08/14/2024] [Indexed: 09/04/2024]
Abstract
Pseudomonas aeruginosa is a growing concern in healthcare associated infections and poses significant risk to those with serious underlying health conditions. The antimicrobial resistance traits of the pathogen and ability to form biofilms make effective mitigation and disinfection strategies difficult. Added to this challenge is the role that free-living amoebae such as Acanthamoeba play in the detection, disinfection, and transmission of P. aeruginosa. P. aeruginosa can survive intracellularly within amoebae, which has the potential to limit detectability and permit transmission into high-risk areas. Herein, we have screened for the presence of Acanthamoeba species and P. aeruginosa within a functioning general hospital in Scotland using a culture and molecular approach, noting their presence at several sites over a 4-month period, particularly within floor drains connecting patient rooms. In addition, microbiome analysis revealed amoebae harbour a unique microbial community comprised primarily of Pseudomonas species that were not readily detected using microbiome sequencing techniques on environmental swabs. Having demonstrated that both organisms were consistently present in hospital settings, we investigated the relationship between Acanthamoeba and P. aeruginosa in the laboratory, showing that i) Acanthamoeba growth rate is increased in the presence of Pseudomonas biofilms and viable Pseudomonas persist within the amoebae and ii) hydrogen peroxide-based disinfectants are significantly less effective against an isolate of P. aeruginosa in the presence of Acanthamoeba than when the bacteria are incubated alone. These findings suggest that amoebae, and other protists, can influence the detection and persistence of P. aeruginosa in high-risk areas and should be considered when implementing mitigation strategies.
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Affiliation(s)
- Ronnie Mooney
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Kenny Richardson
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Kiri Rodgers
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Elisa Giammarini
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Roderick Williams
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Steven Kelly
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Ngozi Amaeze
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - Teresa Inkster
- Antimicrobial Resistance & Healthcare Associated Infection (ARHAI) Scotland, Delta House, 48 West Nile Street, Glasgow, United Kingdom
| | - Fiona L Henriquez
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom
| | - William Mackay
- School of Health and Life Sciences, University of the West of Scotland, Lanarkshire Campus, South Lanarkshire, United Kingdom.
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Kar A, Saha P, De R, Bhattacharya S, Mukherjee SK, Hossain ST. Unveiling the role of PA0730.1 sRNA in Pseudomonas aeruginosa virulence and biofilm formation: Exploring rpoS and mucA regulation. Int J Biol Macromol 2024; 279:135130. [PMID: 39214208 DOI: 10.1016/j.ijbiomac.2024.135130] [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: 07/04/2024] [Revised: 08/24/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Small RNA (sRNA) in bacteria serve as the key messengers in regulating genes associated with quorum sensing controlled bacterial virulence. This study was aimed to unveil the regulatory role of sRNA PA0730.1 on the expression of various traits of Pseudomonas aeruginosa linked to pathogenicity, with special emphasis on the growth, colony morphology, cell motility, biofilm formation, and the expression of diverse virulence factors. PA0730.1 sRNA was found to be upregulated both during planktonic stationary growth phase and at biofilm state of P. aeruginosa PAO1. PA0730.1 deleted strain showed significant growth retardation with increased doubling time. Overexpression of PA0730.1 led to enhanced motility and biofilm formation, while the ∆PA0730.1 strain displayed significant inhibition in motility and biofilm formation. Furthermore, PA0730.1 was found to regulate the synthesis of selected virulence factors of P. aeruginosa. These observations in PA0730.1+ and ∆PA0730.1 were found to be correlated with the PA0730.1-mediated repression of transcription regulators, mucA and rpoS, both at transcriptional and translational levels. The results suggest that PA0730.1 sRNA might be a promising target for developing new drug to counter P. aeruginosa pathogenesis, and could also help in RNA oligonucleotide based therapeutic research for formulating a novel therapeutant.
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Affiliation(s)
- Amiya Kar
- Department of Microbiology, University of Kalyani, Kalyani 741235, India
| | - Piyali Saha
- Department of Microbiology, University of Kalyani, Kalyani 741235, India
| | - Rakesh De
- Department of Microbiology, University of Kalyani, Kalyani 741235, India
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Zhang Y, Wang C, Jia R, Long H, Zhou J, Sun G, Wang Y, Zhang Z, Rong X, Jiang Y. Transfer from ciliate to zebrafish: Unveiling mechanisms and combined effects of microplastics and heavy metals. JOURNAL OF HAZARDOUS MATERIALS 2024; 479:135645. [PMID: 39191009 DOI: 10.1016/j.jhazmat.2024.135645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 08/13/2024] [Accepted: 08/23/2024] [Indexed: 08/29/2024]
Abstract
The impacts and toxicological mechanisms of microplastics (MPs) or heavy metals on aquatic ecosystems have been the subject of extensive research and initial understanding. However, the combined toxicity of co-pollutants on organisms and cumulative toxic effects along the food chain are still underexplored. In this study, the ciliate protozoan Paramecium caudatum and zebrafish Danio rerio were used to represent the microbial loop and the higher trophic level, respectively, to illustrate the progressive exposure of MPs and cadmium (Cd2+). The findings indicate that MPs (ca. 1 ×105 items/L) containing with Cd2+ (below 0.1 µg/L) could permeate the bodies of zebrafish through trophic levels after primary ingestion by ciliates. This could cause adverse effects on zebrafish, including alterations in bioindicators (total sugar, triglycerides, lactate, and glycogen) associated with metabolism, delayed hepatic development, disruption of intestinal microbiota, DNA damage, inflammatory responses, and abnormal cellular apoptosis. In addition, the potential risks associated with the transfer of composite pollutants through the microbial loop into traditional food chain were examined, offering novel insights on the evaluation of the ecological risks associated with MPs. As observed, understanding the bioaccumulation and toxic effects of combined pollutants in zebrafish holds crucial implications for food safety and human health.
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Affiliation(s)
- Yan Zhang
- College of Marine Life Sciences, Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
| | - Caixia Wang
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Ruiqi Jia
- College of Marine Life Sciences, Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
| | - Hongan Long
- MoE Key Laboratory of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China
| | - Jianfeng Zhou
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Gaojingwen Sun
- College of Marine Life Sciences, Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
| | - YunLong Wang
- College of Marine Life Sciences, Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
| | - Zhaoji Zhang
- College of Marine Life Sciences, Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
| | - Xiaozhi Rong
- Key Laboratory of Marine Drugs (Ocean University of China), Chinese Ministry of Education, and School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
| | - Yong Jiang
- College of Marine Life Sciences, Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China; MoE Key Laboratory of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
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15
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Luo VC, Peczuh MW. Location, Location, Location: Establishing Design Principles for New Antibacterials from Ferric Siderophore Transport Systems. Molecules 2024; 29:3889. [PMID: 39202968 PMCID: PMC11357680 DOI: 10.3390/molecules29163889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Revised: 08/09/2024] [Accepted: 08/12/2024] [Indexed: 09/03/2024] Open
Abstract
This review strives to assemble a set of molecular design principles that enables the delivery of antibiotic warheads to Gram-negative bacterial targets (ESKAPE pathogens) using iron-chelating siderophores, known as the Trojan Horse strategy for antibiotic development. Principles are derived along two main lines. First, archetypical siderophores and their conjugates are used as case studies for native iron transport. They enable the consideration of the correspondence of iron transport and antibacterial target location. The second line of study charts the rationale behind the clinical antibiotic cefiderocol. It illustrates the potential versatility for the design of new Trojan Horse-based antibiotics. Themes such as matching the warhead to a location where the siderophore delivers its cargo (i.e., periplasm vs. cytoplasm), whether or not a cleavable linker is required, and the relevance of cheaters to the effectiveness and selectivity of new conjugates will be explored. The effort to articulate rules has identified gaps in the current understanding of iron transport pathways and suggests directions for new investigations.
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Affiliation(s)
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, U3060, Storrs, CT 06269, USA;
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16
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Sun C, Xu Y, Xu G, Ji X, Jiang P, He Y. Active fractions from Jingfang Baidu Powder alleviate Klebsiella-induced Pneumonia by inhibiting TLR4/Myd88-ERK signaling pathway. JOURNAL OF ETHNOPHARMACOLOGY 2024; 330:118067. [PMID: 38636574 DOI: 10.1016/j.jep.2024.118067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/04/2024] [Accepted: 03/15/2024] [Indexed: 04/20/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Jingfang Baidu Powder (JFBDP) is a classic traditional Chinese medicine prescription. Although Jingfang Baidu powder obtained a general consensus on clinical efficacy in treating pneumonia, there were many Chinese herbal drugs in formula, complex components, and large oral dosage, which brings certain obstacles to clinical application. AIM OF THE STUDY Therefore, screening of the active fraction that exerts anti-pneumonia helps improve the pharmaceutical preparation, improve the treatment compliance of patients, and further contribute to the clinical application, and the screening of the new active ingredients with anti-pneumonia. The histopathological observation, real-time quantitative PCR, western blotting, and immunofluorescence were applied to evaluate the anti-pneumonia efficacy of active fractions from JFBDP. RESULTS Three fractions from JFBDP inhibit the gene expression of IL-1β, IL-10, CCL3, CCL5, and CCL22 in lung tissue infected by Klebsiella at various degrees, and presented a good dose-response relationship. JF50 showed stronger anti-inflammatory effects among three fractions including JF30, JF50, and JF75. Besides, JF50 significantly reduced the protein expression of TLR4 and Myd88 in lung tissue infected with Klebsiella, and it also significantly inhibited p-ERK and p-NF-κB p65. JF50 significantly inhibits the protein expression of Caspase 3, Caspase 8, and Caspase 9 in lung tissue infected with Klebsiella at the dose of 25 mg/kg and 50 mg/kg. CONCLUSION JF50 improves lung pathological damage in Klebsiella pneumonia mice by inhibiting the TLR4/Myd88/NF-κB-ERK signaling pathway, and inhibiting apoptosis of lung tissue cells. These findings provide a reference for further exploring the active substance basis of Jingfang Baidu Powder in treating bacterial pneumonia.
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Affiliation(s)
- Chuanbo Sun
- College of Biotechnology and Pharmaceutical Engineering of West Anhui University, Lu'an, 237012, China.
| | - Yuting Xu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Guangpei Xu
- College of Biotechnology and Pharmaceutical Engineering of West Anhui University, Lu'an, 237012, China.
| | - Xu Ji
- Anhui Province Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Science and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230001, China.
| | - Ping Jiang
- College of Biotechnology and Pharmaceutical Engineering of West Anhui University, Lu'an, 237012, China.
| | - Yanfei He
- College of Biotechnology and Pharmaceutical Engineering of West Anhui University, Lu'an, 237012, China.
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17
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Sendra E, Fernández-Muñoz A, Zamorano L, Oliver A, Horcajada JP, Juan C, Gómez-Zorrilla S. Impact of multidrug resistance on the virulence and fitness of Pseudomonas aeruginosa: a microbiological and clinical perspective. Infection 2024; 52:1235-1268. [PMID: 38954392 PMCID: PMC11289218 DOI: 10.1007/s15010-024-02313-x] [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: 03/22/2024] [Accepted: 05/30/2024] [Indexed: 07/04/2024]
Abstract
Pseudomonas aeruginosa is one of the most common nosocomial pathogens and part of the top emergent species associated with antimicrobial resistance that has become one of the greatest threat to public health in the twenty-first century. This bacterium is provided with a wide set of virulence factors that contribute to pathogenesis in acute and chronic infections. This review aims to summarize the impact of multidrug resistance on the virulence and fitness of P. aeruginosa. Although it is generally assumed that acquisition of resistant determinants is associated with a fitness cost, several studies support that resistance mutations may not be associated with a decrease in virulence and/or that certain compensatory mutations may allow multidrug resistance strains to recover their initial fitness. We discuss the interplay between resistance profiles and virulence from a microbiological perspective but also the clinical consequences in outcomes and the economic impact.
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Affiliation(s)
- Elena Sendra
- Infectious Diseases Service, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group (IPAR), Hospital del Mar Research Institute, Universitat Autònoma de Barcelona (UAB), CEXS-Universitat Pompeu Fabra, Passeig Marítim 25-27, 08003, Barcelona, Spain
| | - Almudena Fernández-Muñoz
- Research Unit, University Hospital Son Espases-Health Research Institute of the Balearic Islands (IdISBa), Microbiology Department, University Hospital Son Espases, Crtra. Valldemossa 79, 07010, Palma, Spain
| | - Laura Zamorano
- Research Unit, University Hospital Son Espases-Health Research Institute of the Balearic Islands (IdISBa), Microbiology Department, University Hospital Son Espases, Crtra. Valldemossa 79, 07010, Palma, Spain
| | - Antonio Oliver
- Research Unit, University Hospital Son Espases-Health Research Institute of the Balearic Islands (IdISBa), Microbiology Department, University Hospital Son Espases, Crtra. Valldemossa 79, 07010, Palma, Spain
- Center for Biomedical Research in Infectious Diseases Network (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Juan Pablo Horcajada
- Infectious Diseases Service, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group (IPAR), Hospital del Mar Research Institute, Universitat Autònoma de Barcelona (UAB), CEXS-Universitat Pompeu Fabra, Passeig Marítim 25-27, 08003, Barcelona, Spain
- Center for Biomedical Research in Infectious Diseases Network (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Carlos Juan
- Research Unit, University Hospital Son Espases-Health Research Institute of the Balearic Islands (IdISBa), Microbiology Department, University Hospital Son Espases, Crtra. Valldemossa 79, 07010, Palma, Spain.
- Center for Biomedical Research in Infectious Diseases Network (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain.
| | - Silvia Gómez-Zorrilla
- Infectious Diseases Service, Hospital del Mar, Infectious Pathology and Antimicrobials Research Group (IPAR), Hospital del Mar Research Institute, Universitat Autònoma de Barcelona (UAB), CEXS-Universitat Pompeu Fabra, Passeig Marítim 25-27, 08003, Barcelona, Spain.
- Center for Biomedical Research in Infectious Diseases Network (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain.
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18
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Bhagwat AC, Saroj SD. Polyamine as a microenvironment factor in resistance to antibiotics. Crit Rev Microbiol 2024; 50:504-513. [PMID: 37339480 DOI: 10.1080/1040841x.2023.2223277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/30/2023] [Accepted: 06/05/2023] [Indexed: 06/22/2023]
Abstract
One of the main issues in modern medicine is the decrease in the efficacy of antibiotic therapy against resistant microorganisms. The advent of antimicrobial resistance has added significantly to the impact of infectious diseases, in number of infections, as well as added healthcare costs. The development of antibiotic tolerance and resistance is influenced by a variety of environmental variables, and it is important to identify these environmental factors as part of any strategy for combating antibiotic resistance. The review aims to emphasize that biogenic polyamines are one of such environmental cues that impacts the antibiotic resistance in bacteria. The biogenic polyamines can help bacteria acquire resistance to antibiotics either by regulating the level of number of porin channels in the outer membrane, by modifying the outer membrane liposaccharides or by protecting macromolecule from antibiotic stress. Thus, understanding the way polyamines function in bacteria can thus be beneficial while designing the drugs to combat diseases.
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Affiliation(s)
- Amrita C Bhagwat
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Pune, Maharashtra, India
| | - Sunil D Saroj
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Pune, Maharashtra, India
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19
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Cervoni M, Sposato D, Ferri G, Bähre H, Leoni L, Rampioni G, Visca P, Recchiuti A, Imperi F. The diadenosine tetraphosphate hydrolase ApaH contributes to Pseudomonas aeruginosa pathogenicity. PLoS Pathog 2024; 20:e1012486. [PMID: 39159286 PMCID: PMC11361744 DOI: 10.1371/journal.ppat.1012486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 08/29/2024] [Accepted: 08/07/2024] [Indexed: 08/21/2024] Open
Abstract
The opportunistic bacterial pathogen Pseudomonas aeruginosa causes a wide range of infections that are difficult to treat, largely because of the spread of antibiotic-resistant isolates. Antivirulence therapy, í.e. the use of drugs that inhibit the expression or activity of virulence factors, is currently considered an attractive strategy to reduce P. aeruginosa pathogenicity and complement antibiotic treatments. Because of the multifactorial nature of P. aeruginosa virulence and the broad arsenal of virulence factors this bacterium can produce, the regulatory networks that control the expression of multiple virulence traits have been extensively explored as potential targets for antivirulence drug development. The intracellular signaling molecule diadenosine tetraphosphate (Ap4A) has been reported to control stress resistance and virulence-related traits in some bacteria, but its role has not been investigated in P. aeruginosa so far. To fill this gap, we generated a mutant of the reference strain P. aeruginosa PAO1 that lacks the Ap4A-hydrolysing enzyme ApaH and, consequently, accumulates high intracellular levels of Ap4A. Phenotypic and transcriptomic analyses revealed that the lack of ApaH causes a drastic reduction in the expression of several virulence factors, including extracellular proteases, elastases, siderophores, and quorum sensing signal molecules. Accordingly, infection assays in plant and animal models demonstrated that ApaH-deficient cells are significantly impaired in infectivity and persistence in different hosts, including mice. Finally, deletion of apaH in P. aeruginosa clinical isolates demonstrated that the positive effect of ApaH on the production of virulence-related traits and on infectivity is conserved in P. aeruginosa. This study provides the first evidence that the Ap4A-hydrolysing enzyme ApaH is important for P. aeruginosa virulence, highlighting this protein as a novel potential target for antivirulence therapies against P. aeruginosa.
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Affiliation(s)
| | | | - Giulia Ferri
- Department of Medical, Oral and Biotechnology Sciences, University of Chieti-Pescara, Chieti, Italy
| | - Heike Bähre
- Research Core Unit Metabolomics, Hannover Medical School, Hannover, Germany
| | - Livia Leoni
- Department of Science, University Roma Tre, Rome, Italy
| | - Giordano Rampioni
- Department of Science, University Roma Tre, Rome, Italy
- IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Paolo Visca
- Department of Science, University Roma Tre, Rome, Italy
- IRCCS Fondazione Santa Lucia, Rome, Italy
- NBFC, National Biodiversity Future Center, Palermo, Italy
| | - Antonio Recchiuti
- Department of Medical, Oral and Biotechnology Sciences, University of Chieti-Pescara, Chieti, Italy
| | - Francesco Imperi
- Department of Science, University Roma Tre, Rome, Italy
- IRCCS Fondazione Santa Lucia, Rome, Italy
- NBFC, National Biodiversity Future Center, Palermo, Italy
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20
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Vaishnav B, Wadivkar A, Pailla R, Mondkar S. Clinical and Microbiological Profile of Gram-Negative Infections in Critically Ill Diabetic Patients. Cureus 2024; 16:e65955. [PMID: 39221400 PMCID: PMC11365711 DOI: 10.7759/cureus.65955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2024] [Indexed: 09/04/2024] Open
Abstract
Background and aim Type 2 diabetes mellitus (T2DM) is associated with several infections due to hyperglycemia and impaired immunity. This study aims to analyze the clinical and microbiological profile of critically ill T2DM patients with sepsis due to gram-negative bacteria (GNB). Materials and methods A prospective cross-sectional observational study was conducted at Dr. D. Y. Patil Medical College, Hospital & Research Centre, Pune, India, between December 2023 and May 2024, after ethics committee approval. A total of 100 patients (50 T2DM cases and 50 nondiabetic controls), diagnosed with sepsis due to GNB and admitted to the medical ICU, were included in the study. The clinical profile and laboratory investigations of these patients were studied. Cultures were obtained from peripheral/central venous samples, tracheal secretions, and urine samples. Cultures from other specimens, such as ascitic fluid, cerebrospinal fluid, and pus from skin and soft tissue infections, were also obtained. The statistical tests that were applied were two-tailed with a 95% CI, and a p-value of less than 0.05 was considered statistically significant. Results The mean age of critically ill T2DM cases was 60.52 ± 12.88 years. Of the 50 T2DM cases, 28 were males and 22 were females. The most common infection in critically ill T2DM patients was bloodstream infection (n = 21), followed by bronchopneumonia (n = 16) and urinary tract infections (n = 10). Escherichia coli (n = 15) and Klebsiella pneumoniae (n = 15) were the most common gram-negative pathogens isolated. The most common GNB isolated from the blood cultures of critically ill T2DM patients was Acinetobacter spp. (n = 6). The death rate was significantly higher in T2DM patients with GNB sepsis as compared to nondiabetic controls. Conclusion GNBs like E. coli, K. pneumoniae, and Acinetobacter spp. are commonly found in critically ill T2DM patients with sepsis. Bloodstream infection was the most common site of infection in critically ill T2DM cases. Acinetobacter spp. was the most common isolate found in the blood cultures of critically ill T2DM patients. It is important to identify the site of sepsis, isolate the organism, and treat it with appropriate antibiotics promptly in critically ill T2DM patients to improve the outcomes of these patients.
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Affiliation(s)
- Bhumika Vaishnav
- General Medicine, Dr. D. Y. Patil Medical College, Hospital & Research Centre, Pune, IND
| | - Aniruddh Wadivkar
- General Medicine, Dr. D. Y. Patil Medical College, Hospital & Research Centre, Pune, IND
| | - Ruchitha Pailla
- General Medicine, Dr. D. Y. Patil Medical College, Hospital & Research Centre, Pune, IND
| | - Saish Mondkar
- General Medicine, Dr. D. Y. Patil Medical College, Hospital & Research Centre, Pune, IND
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21
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Yasin A, Mandato A, Hofmann L, Igbaria-Jaber Y, Shenberger Y, Gevorkyan-Airapetov L, Saxena S, Ruthstein S. The Dynamic Plasticity of P. aeruginosa CueR Copper Transcription Factor upon Cofactor and DNA Binding. Chembiochem 2024; 25:e202400279. [PMID: 38776258 DOI: 10.1002/cbic.202400279] [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: 03/26/2024] [Revised: 05/17/2024] [Accepted: 05/22/2024] [Indexed: 05/24/2024]
Abstract
Bacteria use specialized proteins, like transcription factors, to rapidly control metal ion balance. CueR is a Gram-negative bacterial copper regulator. The structure of E. coli CueR complexed with Cu(I) and DNA was published, since then many studies have shed light on its function. However, P. aeruginosa CueR, which shows high sequence similarity to E. coli CueR, has been less studied. Here, we applied room-temperature electron paramagnetic resonance (EPR) measurements to explore changes in dynamics of P. aeruginosa CueR in dependency of copper concentrations and interaction with two different DNA promoter regions. We showed that P. aeruginosa CueR is less dynamic than the E. coli CueR protein and exhibits much higher sensitivity to DNA binding as compared to its E. coli CueR homolog. Moreover, a difference in dynamical behavior was observed when P. aeruginosa CueR binds to the copZ2 DNA promoter sequence compared to the mexPQ-opmE promoter sequence. Such dynamical differences may affect the expression levels of CopZ2 and MexPQ-OpmE proteins in P. aeruginosa. Overall, such comparative measurements of protein-DNA complexes derived from different bacterial systems reveal insights about how structural and dynamical differences between two highly homologous proteins lead to quite different DNA sequence-recognition and mechanistic properties.
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Affiliation(s)
- Ameer Yasin
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel, 5290002
| | - Alysia Mandato
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260
| | - Lukas Hofmann
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel, 5290002
| | - Yasmin Igbaria-Jaber
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel, 5290002
| | - Yulia Shenberger
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel, 5290002
| | - Lada Gevorkyan-Airapetov
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel, 5290002
| | - Sunil Saxena
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260
| | - Sharon Ruthstein
- Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel, 5290002
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22
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Chen P, Qin J, Su HK, Du L, Zeng Q. Harmine acts as a quorum sensing inhibitor decreasing the virulence and antibiotic resistance of Pseudomonas aeruginosa. BMC Infect Dis 2024; 24:760. [PMID: 39085766 PMCID: PMC11293143 DOI: 10.1186/s12879-024-09639-9] [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: 04/22/2024] [Accepted: 07/22/2024] [Indexed: 08/02/2024] Open
Abstract
BACKGROUND As antimicrobial resistance (AMR) has become a global health crisis, new strategies against AMR infection are urgently needed. Quorum sensing (QS), responsible for bacterial communication and pathogenicity, is among the targets for anti-virulence drugs that thrive as one of the promising treatments against AMR infection. METHODS We identified a natural compound, Harmine, through virtual screening based on three QS receptors of Pseudomonas aeruginosa (P. aeruginosa) and explored the effect of Harmine on QS-controlled and pathogenicity-related phenotypes including pyocyanin production, exocellular protease excretion, biofilm formation, and twitching motility of P. aeruginosa PA14. The protective effect of Harmine on Caenorhabditis elegans (C. elegans) and mice infection models was determined and the synergistic effect of Harmine combined with common antibiotics was explored. The underlaying mechanism of Harmine's QS inhibitory effect was illustrated by molecular docking analysis, transcriptomic analysis, and target verification assay. RESULTS In vitro results suggested that Harmine possessed QS inhibitory effects on pyocyanin production, exocellular protease excretion, biofilm formation, and twitching motility of P. aeruginosa PA14, and in vivo results displayed Harmine's protective effect on C. elegans and mice infection models. Intriguingly, Harmine increased susceptibility of both PA14 and clinical isolates of P. aeruginosa to polymyxin B and kanamycin when used in combination. Moreover, Harmine down-regulated a series of QS controlled genes associated with pathogenicity and the underlying mechanism may have involved competitively antagonizing autoinducers' receptors LasR, RhlR, and PqsR. CONCLUSIONS This study shed light on the anti-virulence potential of Harmine against QS targets, suggesting the possible use of Harmine and its derivates as anti-virulence compounds.
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Affiliation(s)
- Pei Chen
- Department of Respiratory and Critical Care Medicine, Affiliated Hospital/Clinical College of Chengdu University, No. 82, North Section 2, 2nd Ring Road, Chengdu, 610081, China
| | - Jiangyue Qin
- General Practice Ward/International Medical Center Ward, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, 610081, China
| | - Helene K Su
- Seven Lakes High School, Katy, TX, 77494, USA
| | - Lianming Du
- Institute for Advanced Study, Chengdu University, No. 2025, Chengluo Avenue, Chengdu, 610106, China.
| | - Qianglin Zeng
- Department of Respiratory and Critical Care Medicine, Affiliated Hospital/Clinical College of Chengdu University, No. 82, North Section 2, 2nd Ring Road, Chengdu, 610081, China.
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23
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Boushra MR, Gad GFM, Hassuna NA, Waly NGF, Ibrahem RA. Phenotypic and genotypic assessment of fluoroquinolones and aminoglycosides resistances in Pseudomonas aeruginosa collected from Minia hospitals, Egypt during COVID-19 pandemic. BMC Infect Dis 2024; 24:763. [PMID: 39085804 PMCID: PMC11292888 DOI: 10.1186/s12879-024-09605-5] [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: 03/02/2024] [Accepted: 07/11/2024] [Indexed: 08/02/2024] Open
Abstract
BACKGROUND One of the most prevalent bacteria that cause nosocomial infections is Pseudomonas aeruginosa. Fluoroquinolones (FQ) and aminoglycosides are vital antipseudomonal drugs, but resistance is increasingly prevalent. The study sought to investigate the diverse mechanisms underlying FQ and aminoglycoside resistance in various P. aeruginosa strains particularly during the COVID-19 crisis. METHODS From various clinical and environmental samples, 110 P. aeruginosa isolates were identified and their susceptibility to several antibiotic classes was evaluated. Molecular techniques were used to track target gene mutations, the presence of genes encoding for quinolone resistance, modifying enzymes for aminoglycosides and resistance methyltransferase (RMT). Efflux pump role was assessed phenotypically and genotypically. Random amplified polymorphic DNA (RAPD) analysis was used to measure clonal diversity. RESULTS QnrS was the most frequently encountered quinolone resistance gene (37.5%) followed by qnrA (31.2%) and qnrD (25%). Among aminoglycoside resistant isolates, 94.1% harbored modifying enzymes genes, while RMT genes were found in 55.9% of isolates. The aac(6')-Ib and rmtB were the most prevalent genes (79.4% and 32.3%, respectively). Most FQ resistant isolates overexpressed mexA (87.5%). RAPD fingerprinting showed 63.2% polymorphism. CONCLUSIONS Aminoglycosides and FQ resistance observed in this study was attributed to several mechanisms with the potential for cross-contamination existence so, strict infection control practices are crucial.
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Affiliation(s)
- Maria Refaat Boushra
- Department of Microbiology and Immunology, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Gamal Fadl Mahmoud Gad
- Department of Microbiology and Immunology, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Noha Anwar Hassuna
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Minia University, Minia, Egypt
| | - Nancy Gamil Fawzy Waly
- Department of Microbiology and Immunology, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Reham Ali Ibrahem
- Department of Microbiology and Immunology, Faculty of Pharmacy, Minia University, Minia, Egypt.
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24
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Cocorullo M, Stelitano G, Chiarelli LR. Phage Therapy: An Alternative Approach to Combating Multidrug-Resistant Bacterial Infections in Cystic Fibrosis. Int J Mol Sci 2024; 25:8321. [PMID: 39125890 PMCID: PMC11313351 DOI: 10.3390/ijms25158321] [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: 06/19/2024] [Revised: 07/25/2024] [Accepted: 07/27/2024] [Indexed: 08/12/2024] Open
Abstract
Patients with cystic fibrosis (CF) are prone to developing life-threatening lung infections with a variety of pathogens that are difficult to eradicate, such as Burkholderia cepacia complex (Bcc), Hemophilus influenzae, Mycobacterium abscessus (Mab), Pseudomonas aeruginosa, and Staphylococcus aureus. These infections still remain an important issue, despite the therapy for CF having considerably improved in recent years. Moreover, prolonged exposure to antibiotics in combination favors the development and spread of multi-resistant bacteria; thus, the development of alternative strategies is crucial to counter antimicrobial resistance. In this context, phage therapy, i.e., the use of phages, viruses that specifically infect bacteria, has become a promising strategy. In this review, we aim to address the current status of phage therapy in the management of multidrug-resistant infections, from compassionate use cases to ongoing clinical trials, as well as the challenges this approach presents in the particular context of CF patients.
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Affiliation(s)
| | | | - Laurent Robert Chiarelli
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, Via A. Ferrata 9, 27100 Pavia, Italy; (M.C.); (G.S.)
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Zheng L, Wang Z, Guo J, Guan J, Lu G, Jing J, Sun S, Sun Y, Ji X, Jiang B, Wang Y, Zhao C, Zhu L, Guo X. Comparative genomics of Tn6411 transposons carrying the blaIMP-1 gene in Pseudomonas aeruginosa. PLoS One 2024; 19:e0306442. [PMID: 38980842 PMCID: PMC11232968 DOI: 10.1371/journal.pone.0306442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 06/15/2024] [Indexed: 07/11/2024] Open
Abstract
We aimed to determine the molecular characteristics of carbapenem-resistant Pseudomonas aeruginosa strains 18081308 and 18083286, which were isolated from the urine and the sputum of two Chinese patients, respectively. Additionally, we conducted a comparative analysis between Tn6411 carrying blaIMP-1 in strain 18083286 and transposons from the same family available in GenBank. Bacterial genome sequencing was carried out on strains 18081308 and 18083286 to obtain their whole genome sequence. Average nucleotide identity (ANI) was used for their precise species identification. Serotyping and multilocus sequence typing were performed. Furthermore, the acquired drug resistance genes of these strains were identified. The carbapenem-resistant P. aeruginosa strains isolated in the present study were of sequence type ST865 and serotype O6. They all carried the same resistance genes (aacC2, tmrB, and blaIMP-1). Tn6411, a Tn7-like transposon carrying blaIMP-1, was found in strain 18083286 by single molecule real time (SMRT) sequencing. We also identified the presence of this transposon sequence in other chromosomes of P. aeruginosa and plasmids carried by Acinetobacter spp. in GenBank, indicating the necessity for heightening attention to the potential transferability of this transposon.
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Affiliation(s)
- Lin Zheng
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Zixian Wang
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Jingyi Guo
- The Second Clinical Medical College of Jilin University, Changchun, Jilin, China
| | - Jiayao Guan
- College of Veterinary Medicine, Jilin Agriculture University, Changchun, Jilin, China
| | - Gejin Lu
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Jie Jing
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Shiwen Sun
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Yang Sun
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Xue Ji
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Bowen Jiang
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Yongjie Wang
- Department of Spinal Surgery, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Chuanfang Zhao
- Institute of Special Animal and Plant Science of Chinese Academy of Agricultural Sciences, Changchun, Jilin, China
| | - Lingwei Zhu
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Xuejun Guo
- Changchun Veterinary Research Institute, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Chinese Academy of Agricultural Sciences, Changchun, China
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Adeyelu OO, Essien EN, Adebote V, Ajayi A, Essiet UU, Adeleye AI, Smith SI. Antimicrobial resistance genetic determinants and susceptibility profile of Pseudomonas aeruginosa isolated from clinical samples in a tertiary hospital in Ogun State, Nigeria. Trans R Soc Trop Med Hyg 2024; 118:474-476. [PMID: 38506281 DOI: 10.1093/trstmh/trae012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 01/31/2024] [Accepted: 02/29/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND Genetic determinants are known to promote antibiotic resistance through horizontal gene transfer. METHODS We molecularly characterized integrons, plasmid replicon types and metallo-β-lactamase-encoding genes of 38 Pseudomonas aeruginosa strains isolated from clinical samples. RESULTS The P. aeruginosa isolates displayed high resistance (97.4%) to β-lactams. Seventeen (44.74%) of them possessed plasmids. Of the 17 isolates that possessed plasmids, 11 (64.7%) of them harboured IncFIA plasmid replicon type, while 6 (35.3%), 5 (29.4%) and 5 (29.4%) were of the IncFIB, IncF and IncW types, respectively. The intI1 gene was detected in 19 (50%) of the isolates. The blaNDM-A, blaNDM-B and blaVIM genes were detected in 14 (35.9%), 4 (10.3%) and 5 (12.8%) of the isolates, respectively. CONCLUSIONS High resistance to β-lactams was observed among P. aeruginosa strains of clinical origin in this study. They possessed transmissible genetic elements indicating the potential for continuous dissemination, thus continuous surveillance is advocated.
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Affiliation(s)
| | | | - Valentine Adebote
- Department of Biological Sciences, College of Science and Technology, Covenant University, Sango Ota, Ogun State, Nigeria
| | - Abraham Ajayi
- Molecular Biology and Biotechnology Department, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | - Utibeima Udo Essiet
- Molecular Biology and Biotechnology Department, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | | | - Stella Ifeanyi Smith
- Molecular Biology and Biotechnology Department, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
- Department of Biological Sciences, Mountain Top University, Ogun State, Nigeria
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27
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Duan M, Qiu C, Huang X, Sun L, He X, Wang Z, Yue H, Wang K, Qi Y, Peng S, Shi X, Xi Z, Tong M, Ding X, Hou Y, Zhao Y. Novel biaryloxazolidinone derivatives with broad-spectrum antibacterial activity, favorable drug-like profiles and in vivo efficacy against linezolid-resistant Staphylococcusaureus. Eur J Med Chem 2024; 273:116493. [PMID: 38761790 DOI: 10.1016/j.ejmech.2024.116493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/02/2024] [Accepted: 05/08/2024] [Indexed: 05/20/2024]
Abstract
The emergence of multidrug-resistant bacteria along with a declining pipeline of clinically useful antibiotics has led to the urgent need for the development of more effective antibacterial agents to treat drug-resistant bacteria. We previously discovered compound OB-158 with potent antibacterial activity but exhibited poor oral bioavailability. Herein, a systematic structural optimization of OB-158 to improve pharmacokinetic profiles yielded 26 novel biaryloxazolidinone analogues, and their activities against Gram-positive S. aureus, multidrug resistant S. aureus and Enterococcus faecalis were evaluated. Remarkably, compound 8b was identified with potent antibacterial activity against S. aureus (MIC = 0.06 μg/mL), MSSA (MIC = 0.125 μg/mL), MRSA (MIC = 0.06 μg/mL), LRSA (MIC = 0.125 μg/mL) and LREFa (MIC = 0.5 μg/mL). Compound 8b was demonstrated as a promising candidate through druglikeness evaluation including metabolism in microsomes and plasma, Caco-2 cell permeability, plasma protein binding, cytotoxicity, and inhibition of CYP450 and human monoamine oxidase. Notably, compound 8b displayed excellent PK profile with appropriate T1/2 of 1.49 h, high peak plasma concentration (Cmax = 2320 ng/mL), high plasma exposure (AUC0-t = 8310 h ng/mL), and superior oral bioavailability (F = 68.1 %) in Sprague-Dawley rats. Ultimately, in vivo efficacy of compound 8b in a mouse model of LRSA systemic infection was also demonstrated. Taken together, compound 8b represents a promising drug candidate for the treatment of linezolid-resistant Gram-positive bacterial strains infection.
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Affiliation(s)
- Meibo Duan
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Chuang Qiu
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Xinyu Huang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Lei Sun
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Xinzi He
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Zechen Wang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Hao Yue
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Kun Wang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Yinliang Qi
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China
| | - Shan Peng
- 3D BioOptima, 1338 Wuzhong Avenue, Suzhou, 215104, China
| | - Xuan Shi
- 3D BioOptima, 1338 Wuzhong Avenue, Suzhou, 215104, China
| | - Zhiguo Xi
- 3D BioOptima, 1338 Wuzhong Avenue, Suzhou, 215104, China
| | - Minghui Tong
- 3D BioOptima, 1338 Wuzhong Avenue, Suzhou, 215104, China
| | - Xiudong Ding
- Department of Clinical Laboratory, The 309th Hospital of Chinese People's Liberation Army, Beijing 100091, China
| | - Yunlei Hou
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China.
| | - Yanfang Zhao
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang 110016, China.
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Huang M, Cai F, Liu C, Zheng H, Lin X, Li Y, Wang L, Ruan J. Effectiveness of novel β-lactams for Pseudomonas aeruginosa infection: A systematic review and meta-analysis. Am J Infect Control 2024; 52:774-784. [PMID: 38428591 DOI: 10.1016/j.ajic.2024.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/23/2024] [Accepted: 02/23/2024] [Indexed: 03/03/2024]
Abstract
BACKGROUND Novel β-lactams have in vitro activity against Pseudomonas aeruginosa (PA), but their clinical performances and the selection criteria for practical use are still not clear. We aimed to evaluate the efficacy of novel β-lactams for PA infection in various sites and to compare the efficacy of each agent. METHODS We searched PubMed, Embase, Cochrane Library, and Web of Science for randomized controlled trials that used novel β-lactams to treat PA infection. The primary outcomes were clinical cure and favorable microbiological response. Subgroup analyses were performed based on drug type, drug resistance of pathogens, and site of infection. Network meta-analysis was carried out within a Bayesian framework. RESULTS In all studies combined (16 randomized controlled trials), novel β-lactams indicated comparable performance to other treatment regimens in both outcome measures (relative risk = 1.04; 95% confidence interval 0.94-1.15; P = .43) (relative risk = 0.97; 95% confidence interval 0.81-1.17; P = .76). Subgroup analyses showed that the efficacy of ceftolozane-tazobactam (TOL-TAZ), ceftazidime-avibactam (CAZ-AVI), imipenem-cilastatin-relebactam, and cefiderocol had no apparent differences compared to control groups among different infection sites, drug types and drug resistance of PA. In network meta-analysis, the results showed no statistically significant differences between TOL-TAZ, CAZ-AVI, and cefiderocol. CONCLUSIONS TOL-TAZ, CAZ-AVI, imipenem-cilastatin-relebactam, and cefiderocol are not inferior to other agents in the treatment of PA infection. Their efficacy is also comparable between TOL-TAZ, CAZ-AVI, and cefiderocol.
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Affiliation(s)
- Meijia Huang
- The School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Fangqing Cai
- The School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Caiyu Liu
- The School of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Huimin Zheng
- The School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Xiaolan Lin
- The School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Yixuan Li
- The School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Ling Wang
- Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou, China; Molecular Biology Laboratory of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou, China.
| | - Junshan Ruan
- Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou, China; Molecular Biology Laboratory of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou, China.
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29
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Yang X, Zhang H, Zhao Q, Li Q, Li T, Gao J. Total Synthesis of the Repeating Units of Highly Functionalized O-Antigens of Pseudomonas aeruginosa ATCC 27577, O10, and O19. JACS AU 2024; 4:2351-2362. [PMID: 38938791 PMCID: PMC11200240 DOI: 10.1021/jacsau.4c00321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/24/2024] [Accepted: 05/29/2024] [Indexed: 06/29/2024]
Abstract
The first total synthesis of the repeating units of the O-antigens of Pseudomonas aeruginosa ATCC 27577, O10, and O19 was achieved via a linear glycosylation strategy. This also represents the first synthesis of an oligosaccharide containing an α-linked N-acetyl-l-galactosaminuronic acid (l-GalpNAcA) unit. All of the glycosyl linkages, including three challenging 1,2-cis-glycosidic bonds of amino sugars, were effectively constructed with high to exclusive stereoselectivity, while orthogonal protection tactics were employed to facilitate regioselective glycosylations and the introduction of a variety of functionalities. An acetyl group migration phenomenon was found during the synthesis of the O-acylated repeating unit of the P. aeruginosa ATCC 27577 antigen. All synthetic targets carried an amino functional group in the linker at the reducing end, thus facilitating further regioselective elaboration and biological studies. The synthetic strategy established here should be useful for the preparation of other similar oligosaccharides.
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Affiliation(s)
- Xiaoyu Yang
- National
Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate
Chemistry and Glycobiology, Shandong University, Qingdao ,Shandong 266237, China
- NMPA
Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based
Medicine, Shandong University, Qingdao ,Shandong 266237, China
| | - Han Zhang
- Department
of Pharmacy, Shandong University of Traditional
Chinese Medicine, Jinan ,Shandong 250355, China
| | - Qingpeng Zhao
- National
Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate
Chemistry and Glycobiology, Shandong University, Qingdao ,Shandong 266237, China
- NMPA
Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based
Medicine, Shandong University, Qingdao ,Shandong 266237, China
| | - Qingjiang Li
- Department
of Chemistry, University of Massachusetts
Boston, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States
| | - Tiehai Li
- State
Key Laboratory of Chemical Biology, Shanghai Institute of Materia
Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Jian Gao
- National
Glycoengineering Research Center, Shandong Key Laboratory of Carbohydrate
Chemistry and Glycobiology, Shandong University, Qingdao ,Shandong 266237, China
- NMPA
Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based
Medicine, Shandong University, Qingdao ,Shandong 266237, China
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Wang WM, Lu TH, Chen CY, Liao CM. Assessing microplastics-antibiotics coexistence induced ciprofloxacin-resistant Pseudomonas aeruginosa at a water region scale. WATER RESEARCH 2024; 257:121721. [PMID: 38728782 DOI: 10.1016/j.watres.2024.121721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/12/2024]
Abstract
Microplastics (MPs) waste is widespread globally in water systems. The opportunistic human pathogen Pseudomonas aeruginosa can cause serious acute and chronic infections that are notoriously difficult to treat. Ciprofloxacin (CIP) is broadly applied as an anti-P. aeruginosa drug. A growing evidence reveals that antibiotic-resistance genes-carrying Pseudomonas aeruginosa were detected on MPs forming plastisphere due to their adsorbability along with high occurrence of CIP in water environments. The MPs-niched CIP-resistant P. aeruginosa has been likely to emerge as an unignorable public health issue. Here, we offered a novel approach to assess the development of CIP-resistant P. aeruginosa under MPs-antibiotic coexistence at a water region scale. By combing the adsorption isotherm models used to estimate CIP condensation around MPs and a pharmacokinetic/pharmacodynamic-based microbial population dynamic model, we predicted the P. aeruginosa development on CIP-adsorbed MPs in waters. Our assessment revealed a high antibiotic resistance in the P. aeruginosa populations (∼50 %) with a wider range of waterborne total cell counts (∼10-2-104 cfu mL-1) among water regions in that the resistance proportion was primarily determined by CIP pollution level and relative abundance of various polymer type of MPs. We implicate that water region-specific MPs were highly likely to provide media for P. aeruginosa propagation. Our results highlight the importance of antibiotic-resistant pathogen colonization-emerging environmental medium interactions when addressing global threat from MPs pollution, in the context of MPs-antibiotics co-contamination assessment and for the continued provision of water system management.
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Affiliation(s)
- Wei-Min Wang
- Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan 106319, China
| | - Tien-Hsuan Lu
- Department of Science Education and Application, National Taichung University of Education, Taichung 403514, China
| | - Chi-Yun Chen
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL 32610, United States; Center for Environmental and Human Toxicology, University of Florida, FL 32608, United States
| | - Chung-Min Liao
- Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan 106319, China.
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Wen H, Zhang Y, Mi Z, Zhang H, Sun C, Liu X, Fan X. Rational design of PspAlgL to improve its thermostability and anti-biofilm activity against Pseudomonas aeruginosa. Int J Biol Macromol 2024; 269:132084. [PMID: 38719003 DOI: 10.1016/j.ijbiomac.2024.132084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 04/11/2024] [Accepted: 05/02/2024] [Indexed: 05/12/2024]
Abstract
Pseudomonas aeruginosa biofilm enhances tolerance to antimicrobials and immune system defenses. Alginate is an important component of biofilm and a virulence factor of P. aeruginosa. The degradation of alginate by alginate lyases has come to serve as an adjunctive therapeutic strategy against P. aeruginosa biofilm, but poor stability of the enzyme limited this application. Thus, PspAlgL, an alginate lyase, can degrade acetylated alginate but has poor thermostability. The 3D structure of PspAlgL was predicted, and the thermostability of PspAlgL was rationally designed by GRAPE strategy, resulting in two variants with better stability. These variants, PspAlgLS270F/E311P and PspAlgLG291S/E311P, effectively degraded the alginate in biofilm. In addition, compared with PspAlgL, these variants were more efficient in inhibiting biofilm formation and degrading the established biofilm of P. aeruginosa PAO1, and they were also able to destroy the biofilm attached to catheters and to increase the sensitivity of P. aeruginosa to the antibiotic amikacin. This study provides one potential anti-biofilm agent for P. aeruginosa infection.
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Affiliation(s)
- Huamei Wen
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei 230032, Anhui, China
| | - Yanyu Zhang
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei 230032, Anhui, China
| | - Zhongwen Mi
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei 230032, Anhui, China
| | - Haichuan Zhang
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Chenyang Sun
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei 230032, Anhui, China
| | - Xiaolong Liu
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei 230032, Anhui, China.
| | - Xinjiong Fan
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei 230032, Anhui, China.
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Simão FA, Almeida MM, Rosa HS, Marques EA, Leão RS. Genetic determinants of antimicrobial resistance in polymyxin B resistant Pseudomonas aeruginosa isolated from airways of patients with cystic fibrosis. Braz J Microbiol 2024; 55:1415-1425. [PMID: 38619733 PMCID: PMC11153443 DOI: 10.1007/s42770-024-01311-3] [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: 12/18/2023] [Accepted: 03/21/2024] [Indexed: 04/16/2024] Open
Abstract
Pseudomonas aeruginosa is the main pathogen associated with pulmonary exacerbation in patients with cystic fibrosis (CF). CF is a multisystemic genetic disease caused by mutations in the cystic fibrosis transmembrane conductance regulator gene, which mainly affects pulmonary function. P. aeruginosa isolated from individuals with CF in Brazil is not commonly associated with multidrug resistance (MDR), especially when compared to global occurrence, where the presence of epidemic clones, capable of expressing resistance to several drugs, is often reported. Due to the recent observations of MDR isolates of P. aeruginosa in our centers, combined with these characteristics, whole-genome sequencing was employed for analyses related to antimicrobial resistance, plasmid identification, search for phages, and characterization of CF clones. All isolates in this study were polymyxin B resistant, exhibiting diverse mutations and reduced susceptibility to carbapenems. Alterations in mexZ can result in the overexpression of the MexXY efflux pump. Mutations in oprD, pmrB, parS, gyrA and parC may confer reduced susceptibility to antimicrobials by affecting permeability, as observed in phenotypic tests. The phage findings led to the assumption of horizontal genetic transfer, implicating dissemination between P. aeruginosa isolates. New sequence types were described, and none of the isolates showed an association with epidemic CF clones. Analysis of the genetic context of P. aeruginosa resistance to polymyxin B allowed us to understand the different mechanisms of resistance to antimicrobials, in addition to subsidizing the understanding of possible relationships with epidemic strains that circulate among individuals with CF observed in other countries.
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Affiliation(s)
- Felipe A Simão
- Laboratório de Microbiologia da Fibrose Cística, Departamento de Microbiologia, Imunologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mila M Almeida
- Laboratório de Microbiologia da Fibrose Cística, Departamento de Microbiologia, Imunologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Heloísa S Rosa
- Laboratório de Microbiologia da Fibrose Cística, Departamento de Microbiologia, Imunologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Elizabeth A Marques
- Laboratório de Microbiologia da Fibrose Cística, Departamento de Microbiologia, Imunologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robson S Leão
- Laboratório de Microbiologia da Fibrose Cística, Departamento de Microbiologia, Imunologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
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Funke FJ, Schlee S, Sterner R. Validation of aminodeoxychorismate synthase and anthranilate synthase as novel targets for bispecific antibiotics inhibiting conserved protein-protein interactions. Appl Environ Microbiol 2024; 90:e0057224. [PMID: 38700332 PMCID: PMC11107160 DOI: 10.1128/aem.00572-24] [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: 03/28/2024] [Accepted: 04/08/2024] [Indexed: 05/05/2024] Open
Abstract
Multi-resistant bacteria are a rapidly emerging threat to modern medicine. It is thus essential to identify and validate novel antibacterial targets that promise high robustness against resistance-mediating mutations. This can be achieved by simultaneously targeting several conserved function-determining protein-protein interactions in enzyme complexes from prokaryotic primary metabolism. Here, we selected two evolutionary related glutamine amidotransferase complexes, aminodeoxychorismate synthase and anthranilate synthase, that are required for the biosynthesis of folate and tryptophan in most prokaryotic organisms. Both enzymes rely on the interplay of a glutaminase and a synthase subunit that is conferred by a highly conserved subunit interface. Consequently, inhibiting subunit association in both enzymes by one competing bispecific inhibitor has the potential to suppress bacterial proliferation. We comprehensively verified two conserved interface hot-spot residues as potential inhibitor-binding sites in vitro by demonstrating their crucial role in subunit association and enzymatic activity. For in vivo target validation, we generated genomically modified Escherichia coli strains in which subunit association was disrupted by modifying these central interface residues. The growth of such strains was drastically retarded on liquid and solid minimal medium due to a lack of folate and tryptophan. Remarkably, the bacteriostatic effect was observed even in the presence of heat-inactivated human plasma, demonstrating that accessible host metabolite concentrations do not compensate for the lack of folate and tryptophan within the tested bacterial cells. We conclude that a potential inhibitor targeting both enzyme complexes will be effective against a broad spectrum of pathogens and offer increased resilience against antibiotic resistance. IMPORTANCE Antibiotics are indispensable for the treatment of bacterial infections in human and veterinary medicine and are thus a major pillar of modern medicine. However, the exposure of bacteria to antibiotics generates an unintentional selective pressure on bacterial assemblies that over time promotes the development or acquisition of resistance mechanisms, allowing pathogens to escape the treatment. In that manner, humanity is in an ever-lasting race with pathogens to come up with new treatment options before resistances emerge. In general, antibiotics with novel modes of action require more complex pathogen adaptations as compared to chemical derivates of existing entities, thus delaying the emergence of resistance. In this contribution, we use modified Escherichia coli strains to validate two novel targets required for folate and tryptophan biosynthesis that can potentially be targeted by one and the same bispecific protein-protein interaction inhibitor and promise increased robustness against bacterial resistances.
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Affiliation(s)
- Franziska Jasmin Funke
- Institute of Biophysics and Physical Biochemistry, Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
| | - Sandra Schlee
- Institute of Biophysics and Physical Biochemistry, Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
| | - Reinhard Sterner
- Institute of Biophysics and Physical Biochemistry, Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
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Casemiro PAF, Andrade AL, Cardozo MV, Rodrigues RA, Silva JA, Marinho M, Nassar AFC, Castro V, Braz GHR, Gujanwski CA, Padua IRM, Moraes PC. Prevalence and antibiotic resistance in bacterial isolates of dogs with ulcerative keratitis in São Paulo State, Brazil. Vet Ophthalmol 2024. [PMID: 38768284 DOI: 10.1111/vop.13224] [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: 09/28/2023] [Revised: 04/08/2024] [Accepted: 04/17/2024] [Indexed: 05/22/2024]
Abstract
OBJECTIVE Identify microorganisms present in canine eyes affected by ulcerative keratitis and assess its resistance profile to available antimicrobial drugs. METHODS Samples were collected from 88 canine eyes that exhibited ulcerative keratitis. They were identified using MALDI-TOF and subjected to antimicrobial susceptibility testing by disk diffusion. RESULTS Among the assessed subjects, brachycephalic dogs accounted for 74.48% (50/83) of the evaluated canines. Among the 88 evaluated eyes, 90.9% (80/88) showed positive cultures, with 11.33% (10/88) of the samples isolating more than one species of bacteria. Of all bacterial isolates identified (90), Gram-positive bacteria accounted for 63.33% (57/90), while Gram-negative bacteria constituted 36.66% (33/90), with predominance of Staphylococcus spp. at 35.55% (32/90) being, Staphylococcus pseudintermedius at 68.75% (22/32), and Pseudomonas aeruginosa at 15.55% (14/90), respectively. Staphylococcus spp. exhibited resistance to penicillin (89.29%), sulfadiazine and trimethoprim (60.71%), and tetracycline (67.86%), while doxycycline (88.89%), cefotaxime (85.71%), chloramphenicol (82.14%), gentamicin, and moxifloxacin (78.57%) showed the highest sensitivity rates. Pseudomonas aeruginosa displayed sensitivity (100%) to gentamicin and imipenem, and resistance (8.33%) to norfloxacin, ciprofloxacin, and cefepime. Similarly, the Enterobacteriaceae family showed higher sensitivity to amikacin and gentamicin (88.89%), imipenem (88.24%), and levofloxacin (87.5%), with pronounced resistance to amoxicillin-clavulanate (50%) and cefazolin (47.06%). This highlights multiresistance in 23.33% (21/90) of the isolates. CONCLUSIONS The most isolated species in canine ulcerative keratitis are S. pseudintermedius and P. aeruginosa. However, other species were also isolated, demonstrating diversity in ocular microbiota infection. There is a high-rate multidrug resistance associated with canine ulcerative keratitis. Nevertheless, these strains exhibited sensitivity to antimicrobials commonly used in veterinary ophthalmology.
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Affiliation(s)
- Pamella A F Casemiro
- Department of Veterinary Clinical and Surgical Sciences, FCAV, UNESP, Jaboticabal, Brazil
| | - Alexandre L Andrade
- Department of Veterinary Clinical Surgery and Animal Reproduction Animal, FMVA-UNESP, Araçatuba, Brazil
| | - Marita V Cardozo
- Department of Biomedical Sciences and Health, UEMG, Passos, Brazil
| | - Romário A Rodrigues
- Department of Pathology, Reproduction, and One Health, FCAV, UNESP, Jaboticabal, Brazil
| | - Jaqueline A Silva
- Department of Veterinary Clinical and Surgical Sciences, FCAV, UNESP, Jaboticabal, Brazil
| | - Márcia Marinho
- Department of Animal Production and Health, FMVA, UNESP, Araçatuba, Brazil
| | - Alessandra F C Nassar
- Center for Research and Development in Animal Health - General Bacteriology Laboratory, Biological Institute, São Paulo, Brazil
| | - Vanessa Castro
- Center for Research and Development in Animal Health - General Bacteriology Laboratory, Biological Institute, São Paulo, Brazil
| | | | - Cinthya A Gujanwski
- Department of Veterinary Clinical and Surgical Sciences, FCAV, UNESP, Jaboticabal, Brazil
| | - Ivan R M Padua
- Department of Veterinary Clinical and Surgical Sciences, FCAV, UNESP, Jaboticabal, Brazil
| | - Paola C Moraes
- Department of Veterinary Clinical and Surgical Sciences, FCAV, UNESP, Jaboticabal, Brazil
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Romero-González LE, Montelongo-Martínez LF, González-Valdez A, Quiroz-Morales SE, Cocotl-Yañez M, Franco-Cendejas R, Soberón-Chávez G, Pardo-López L, Bustamante VH. Pseudomonas aeruginosa Isolates from Water Samples of the Gulf of Mexico Show Similar Virulence Properties but Different Antibiotic Susceptibility Profiles than Clinical Isolates. Int J Microbiol 2024; 2024:6959403. [PMID: 38784405 PMCID: PMC11115996 DOI: 10.1155/2024/6959403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/14/2024] [Accepted: 04/27/2024] [Indexed: 05/25/2024] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen found in a wide variety of environments, including soil, water, and habitats associated with animals, humans, and plants. From a One Health perspective, which recognizes the interconnectedness of human, animal, and environmental health, it is important to study the virulence characteristics and antibiotic susceptibility of environmental bacteria. In this study, we compared the virulence properties and the antibiotic resistance profiles of seven isolates collected from the Gulf of Mexico with those of seven clinical strains of P. aeruginosa. Our results indicate that the marine and clinical isolates tested exhibit similar virulence properties; they expressed different virulence factors and were able to kill Galleria mellonella larvae, an animal model commonly used to analyze the pathogenicity of many bacteria, including P. aeruginosa. In contrast, the clinical strains showed higher antibiotic resistance than the marine isolates. Consistently, the clinical strains exhibited a higher prevalence of class 1 integron, an indicator of anthropogenic impact, compared with the marine isolates. Thus, our results indicate that the P. aeruginosa marine strains analyzed in this study, isolated from the Gulf of Mexico, have similar virulence properties, but lower antibiotic resistance, than those from hospitals.
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Affiliation(s)
- Luis E. Romero-González
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
| | - Luis F. Montelongo-Martínez
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, Coyoacán, Mexico
| | - Abigail González-Valdez
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, Coyoacán, Mexico
| | - Sara E. Quiroz-Morales
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, Coyoacán, Mexico
| | - Miguel Cocotl-Yañez
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, Coyoacán, Mexico
| | - Rafael Franco-Cendejas
- Instituto Nacional de Rehabilitación “Luis Guillermo Ibarra Ibarra,” Ciudad de México, Mexico
| | - Gloria Soberón-Chávez
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, Coyoacán, Mexico
| | - Liliana Pardo-López
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
| | - Víctor H. Bustamante
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
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Reem A, Almansoob S, Senan AM, Kumar Raj A, Shah R, Kumar Shrewastwa M, Kumal JPP. Pseudomonas aeruginosa and related antibiotic resistance genes as indicators for wastewater treatment. Heliyon 2024; 10:e29798. [PMID: 38694026 PMCID: PMC11058306 DOI: 10.1016/j.heliyon.2024.e29798] [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: 09/20/2023] [Revised: 04/13/2024] [Accepted: 04/15/2024] [Indexed: 05/03/2024] Open
Abstract
This review aims to examine the existence of Pseudomonas aeruginosa (P. aeruginosa) and their antibiotic resistance genes (ARGs) in aquatic settings and the alternative treatment ways. P. aeruginosa in a various aquatic environment have been identified as contaminants with impacts on human health and the environment. P. aeruginosa resistance to multiple antibiotics, such as sulfamethoxazole, ciprofloxacin, quinolone, trimethoprim, tetracycline, vancomycin, as well as specific antibiotic resistance genes including sul1, qnrs, blaVIM, blaTEM, blaCTX, blaAIM-1, tetA, ampC, blaVIM. The development of resistance can occur naturally, through mutations, or via horizontal gene transfer facilitated by sterilizing agents. In addition, an overview of the current knowledge on inactivation of Pseudomonas aeruginosa and ARG and the mechanisms of action of various disinfection processes in water and wastewater (UV chlorine processes, catalytic oxidation, Fenton reaction, and ozonation) is given. An overview of the effects of nanotechnology and the resulting wetlands is also given.
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Affiliation(s)
- Alariqi Reem
- Medical Laboratory Department, Faculty of Medical Sciences, Amran University, Yemen
| | - Siham Almansoob
- International department, Changsha medical university, Changsha, Hunan, 410000, China
| | - Ahmed M. Senan
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Suleyman Demirel University, Isparta, 32260, Turkey
| | - Aditya Kumar Raj
- Department of Physiology, National Medical College, Birgunj, Nepal
| | - Rajesh Shah
- Department of Microbiology, Nepalgunj Medical College, Chisapani, Banke, Nepal
| | - Mukesh Kumar Shrewastwa
- Department of Biochemistry, Nepalgunj Medical College, Kohalpur, Banke, Nepal
- Department of Biochemistry (IMS & SUM hospital), SOA, deemed to be University, Bhubaneswar, India
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Lyons N, Wu W, Jin Y, Lamont IL, Pletzer D. Using host-mimicking conditions and a murine cutaneous abscess model to identify synergistic antibiotic combinations effective against Pseudomonas aeruginosa. Front Cell Infect Microbiol 2024; 14:1352339. [PMID: 38808066 PMCID: PMC11130353 DOI: 10.3389/fcimb.2024.1352339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 04/25/2024] [Indexed: 05/30/2024] Open
Abstract
Antibiotic drug combination therapy is critical for the successful treatment of infections caused by multidrug resistant pathogens. We investigated the efficacy of β-lactam and β-lactam/β-lactamase inhibitor combinations with other antibiotics, against the hypervirulent, ceftazidime/avibactam resistant Pseudomonas aeruginosa Liverpool epidemic strain (LES) B58. Although minimum inhibitory concentrations in vitro differed by up to eighty-fold between standard and host-mimicking media, combinatorial effects only marginally changed between conditions for some combinations. Effective combinations in vitro were further tested in a chronic, high-density murine infection model. Colistin and azithromycin demonstrated combinatorial effects with ceftazidime and ceftazidime/avibactam both in vitro and in vivo. Conversely, while tobramycin and tigecycline exhibited strong synergy in vitro, this effect was not observed in vivo. Our approach of using host-mimicking conditions and a sophisticated animal model to evaluate drug synergy against bacterial pathogens represents a promising approach. This methodology may offer insights into the prediction of combination therapy outcomes and the identification of potential treatment failures.
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Affiliation(s)
- Nikita Lyons
- Department of Microbiology and Immunology, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Weihui Wu
- Department of Microbiology, College of Life Sciences, Nankai University, Tianjin, China
| | - Yongxin Jin
- Department of Microbiology, College of Life Sciences, Nankai University, Tianjin, China
| | - Iain L. Lamont
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Daniel Pletzer
- Department of Microbiology and Immunology, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
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Wen X, Xu J, Worrich A, Li X, Yuan X, Ma B, Zou Y, Wang Y, Liao X, Wu Y. Priority establishment of soil bacteria in rhizosphere limited the spread of tetracycline resistance genes from pig manure to soil-plant systems based on synthetic communities approach. ENVIRONMENT INTERNATIONAL 2024; 187:108732. [PMID: 38728817 DOI: 10.1016/j.envint.2024.108732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/02/2024] [Accepted: 05/07/2024] [Indexed: 05/12/2024]
Abstract
The spread of antibiotic resistance genes (ARGs) in agroecosystems through the application of animal manure is a global threat to human and environmental health. However, the adaptability and colonization ability of animal manure-derived bacteria determine the spread pathways of ARG in agroecosystems, which have rarely been studied. Here, we performed an invasion experiment by creating a synthetic communities (SynCom) with ten isolates from pig manure and followed its assembly during gnotobiotic cultivation of a soil-Arabidopsis thaliana (A. thaliana) system. We found that Firmicutes in the SynCom were efficiently filtered out in the rhizosphere, thereby limiting the entry of tetracycline resistance genes (TRGs) into the plant. However, Proteobacteria and Actinobacteria in the SynCom were able to establish in all compartments of the soil-plant system thereby spreading TRGs from manure to soil and plant. The presence of native soil bacteria prevented the establishment of manure-borne bacteria and effectively reduced the spread of TRGs. Achromobacter mucicolens and Pantoea septica were the main vectors for the entry of tetA into plants. Furthermore, doxycycline stress promoted the horizontal gene transfer (HGT) of the conjugative resistance plasmid RP4 within the SynCom in A. thaliana by upregulating the expression of HGT-related mRNAs. Therefore, this study provides evidence for the dissemination pathways of ARGs in agricultural systems through the invasion of manure-derived bacteria and HGT by conjugative resistance plasmids and demonstrates that the priority establishment of soil bacteria in the rhizosphere limited the spread of TRGs from pig manure to soil-plant systems.
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Affiliation(s)
- Xin Wen
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, China; Department of Environmental Microbiology, Helmholtz Centre for Environmental Research-UFZ, Leipzig 04318, Germany
| | - Jiaojiao Xu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Anja Worrich
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research-UFZ, Leipzig 04318, Germany.
| | - Xianghui Li
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Xingyun Yuan
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Baohua Ma
- Foshan Customs Comprehensive Technology Center, Foshan 528200, China
| | - Yongde Zou
- Foshan Customs Comprehensive Technology Center, Foshan 528200, China
| | - Yan Wang
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, and Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Xindi Liao
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, and Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Yinbao Wu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Resources and Environment, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong 525000, China; National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, and Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
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Tsilipounidaki K, Gkountinoudis CG, Florou Z, Fthenakis GC, Petinaki E. In Silico Molecular Analysis of Carbapenemase-Negative Carbapenem-Resistant Pseudomonas aeruginosa Strains in Greece. Microorganisms 2024; 12:805. [PMID: 38674749 PMCID: PMC11051870 DOI: 10.3390/microorganisms12040805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/02/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024] Open
Abstract
To date, three carbapenem resistance mechanisms have been identified: carbapenemase released from the pathogen, changes in the expression of the outer membrane OprD porin, and overexpression of the efflux pump MexAB-OprM. Twelve carbapenemase-negative carbapenem-resistant Pseudomonas aeruginosa strains, isolated from patients hospitalized at the University Hospital of Larissa, Central Greece, during 2023, which belonged to various sequence types (STs), were selected and were studied focusing on the characterization of their β-lactamases, on changes to OprD and its regulator MexT proteins, and on alterations to the MexAB-OprM regulator proteins encoded by the mexR, nalC, and nalD genes. Whole genome sequencing analysis revealed the presence of β-lactamase encoding genes, with blaPAO present in all isolates. Additionally, seven different genes of the oxacillinase family (blaOXA-35, blaOXA-50, blaOXA-395, blaOXA-396, blaOXA-486, blaOXA-488, blaOXA-494) were identified, with each strain harboring one to three of these. Regarding the OprD, five strains had truncated structures, at Loop 2, Loop 3, Loop 4, and Loop 9, while the remaining strains carried previously reported amino acid changes. Further, an additional strain had a truncated MexR; whereas, two other strains had totally modified NalC sequences. The active form of MexT, responsible for the downregulation of OprD production, as the intact sequence of the NalD protein, was found in all the strains studied. It is concluded that the truncated OprD, MexR, and NalC proteins, detected in eight strains, probably led to inactive proteins, contributing to carbapenem resistance. However, four strains carried known modifications in OprD, MexR, and NalC, as previously reported in both susceptible and resistant strains, a finding that indicates the complexity of carbapenem resistance in P. aeruginosa.
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Affiliation(s)
- Katerina Tsilipounidaki
- Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece; (K.T.); (C.-G.G.); (Z.F.)
| | | | - Zoi Florou
- Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece; (K.T.); (C.-G.G.); (Z.F.)
| | | | - Efthymia Petinaki
- Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece; (K.T.); (C.-G.G.); (Z.F.)
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García-Villada L, Degtyareva NP, Brooks AM, Goldberg JB, Doetsch PW. A role for the stringent response in ciprofloxacin resistance in Pseudomonas aeruginosa. Sci Rep 2024; 14:8598. [PMID: 38615146 PMCID: PMC11016087 DOI: 10.1038/s41598-024-59188-z] [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: 02/01/2024] [Accepted: 04/08/2024] [Indexed: 04/15/2024] Open
Abstract
Pseudomonas aeruginosa is a major cause of nosocomial infections and the leading cause of chronic lung infections in cystic fibrosis and chronic obstructive pulmonary disease patients. Antibiotic treatment remains challenging because P. aeruginosa is resistant to high concentrations of antibiotics and has a remarkable ability to acquire mutations conferring resistance to multiple groups of antimicrobial agents. Here we report that when P. aeruginosa is plated on ciprofloxacin (cipro) plates, the majority of cipro-resistant (ciproR) colonies observed at and after 48 h of incubation carry mutations in genes related to the Stringent Response (SR). Mutations in one of the major SR components, spoT, were present in approximately 40% of the ciproR isolates. Compared to the wild-type strain, most of these isolates had decreased growth rate, longer lag phase and altered intracellular ppGpp content. Also, 75% of all sequenced mutations were insertions and deletions, with short deletions being the most frequently occurring mutation type. We present evidence that most of the observed mutations are induced on the selective plates in a subpopulation of cells that are not instantly killed by cipro. Our results suggests that the SR may be an important contributor to antibiotic resistance acquisition in P. aeruginosa.
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Affiliation(s)
| | | | - Ashley M Brooks
- Integrative Bioinformatics, Biostatistics and Computational Biology Branch, NIEHS, Durham, NC, USA
| | - Joanna B Goldberg
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA
| | - Paul W Doetsch
- Genomic Integrity and Structural Biology Laboratory, NIEHS, Durham, NC, USA.
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Al-Rabia MW, Asfour HZ, Alhakamy NA, Abdulaal WH, Ibrahim TS, Abbas HA, Salem IM, Hegazy WAH, Nazeih SI. Thymoquinone is a natural antibiofilm and pathogenicity attenuating agent in Pseudomonas aeruginosa. Front Cell Infect Microbiol 2024; 14:1382289. [PMID: 38638827 PMCID: PMC11024287 DOI: 10.3389/fcimb.2024.1382289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 03/08/2024] [Indexed: 04/20/2024] Open
Abstract
Pseudomonas aeruginosa belongs to the critical pathogens that represent a global public health problem due to their high rate of resistance as listed by WHO. P. aeruginosa can result in many nosocomial infections especially in individuals with compromised immune systems. Attenuating virulence factors by interference with quorum sensing (QS) systems is a promising approach to treat P. aeruginosa-resistant infections. Thymoquinone is a natural compound isolated from Nigella sativa (black seed) essential oil. In this study, the minimum inhibitory concentration of thymoquinone was detected followed by investigating the antibiofilm and antivirulence activities of the subinhibitory concentration of thymoquinone against P. aeruginosa PAO1. The effect of thymoquinone on the expression of QS genes was assessed by quantitative real-time PCR, and the protective effect of thymoquinone against the pathogenesis of PAO1 in mice was detected by the mouse survival test. Thymoquinone significantly inhibited biofilm, pyocyanin, protease activity, and swarming motility. At the molecular level, thymoquinone markedly downregulated QS genes lasI, lasR, rhlI, and rhlR. Moreover, thymoquinone could protect mice from the pathologic effects of P. aeruginosa increasing mouse survival from 20% to 100%. In conclusion, thymoquinone is a promising natural agent that can be used as an adjunct therapeutic agent with antibiotics to attenuate the pathogenicity of P. aeruginosa.
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Affiliation(s)
- Mohammed W. Al-Rabia
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hani Z. Asfour
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nabil A. Alhakamy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah, Saudi Arabia
- Mohamed Saeed Tamer Chair for Pharmaceutical Industries, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Wesam H. Abdulaal
- Department of Biochemistry, Faculty of Science, Cancer and Mutagenesis Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Tarek S. Ibrahim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hisham A. Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Ibrahim M. Salem
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sphinx University, Assiut, Egypt
| | - Wael A. H. Hegazy
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
- Pharmacy Program, Department of Pharmaceutical Sciences, Oman College of Health Sciences, Muscat, Oman
| | - Shaimaa I. Nazeih
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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Neff SL, Doing G, Reiter T, Hampton TH, Greene CS, Hogan DA. Pseudomonas aeruginosa transcriptome analysis of metal restriction in ex vivo cystic fibrosis sputum. Microbiol Spectr 2024; 12:e0315723. [PMID: 38385740 PMCID: PMC10986534 DOI: 10.1128/spectrum.03157-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 01/22/2024] [Indexed: 02/23/2024] Open
Abstract
Chronic Pseudomonas aeruginosa lung infections are a feature of cystic fibrosis (CF) that many patients experience even with the advent of highly effective modulator therapies. Identifying factors that impact P. aeruginosa in the CF lung could yield novel strategies to eradicate infection or otherwise improve outcomes. To complement published P. aeruginosa studies using laboratory models or RNA isolated from sputum, we analyzed transcripts of strain PAO1 after incubation in sputum from different CF donors prior to RNA extraction. We compared PAO1 gene expression in this "spike-in" sputum model to that for P. aeruginosa grown in synthetic cystic fibrosis sputum medium to determine key genes, which are among the most differentially expressed or most highly expressed. Using the key genes, gene sets with correlated expression were determined using the gene expression analysis tool eADAGE. Gene sets were used to analyze the activity of specific pathways in P. aeruginosa grown in sputum from different individuals. Gene sets that we found to be more active in sputum showed similar activation in published data that included P. aeruginosa RNA isolated from sputum relative to corresponding in vitro reference cultures. In the ex vivo samples, P. aeruginosa had increased levels of genes related to zinc and iron acquisition which were suppressed by metal amendment of sputum. We also found a significant correlation between expression of the H1-type VI secretion system and CFTR corrector use by the sputum donor. An ex vivo sputum model or synthetic sputum medium formulation that imposes metal restriction may enhance future CF-related studies.IMPORTANCEIdentifying the gene expression programs used by Pseudomonas aeruginosa to colonize the lungs of people with cystic fibrosis (CF) will illuminate new therapeutic strategies. To capture these transcriptional programs, we cultured the common P. aeruginosa laboratory strain PAO1 in expectorated sputum from CF patient donors. Through bioinformatic analysis, we defined sets of genes that are more transcriptionally active in real CF sputum compared to a synthetic cystic fibrosis sputum medium. Many of the most differentially active gene sets contained genes related to metal acquisition, suggesting that these gene sets play an active role in scavenging for metals in the CF lung environment which may be inadequately represented in some models. Future studies of P. aeruginosa transcript abundance in CF may benefit from the use of an expectorated sputum model or media supplemented with factors that induce metal restriction.
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Affiliation(s)
- Samuel L. Neff
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Georgia Doing
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Taylor Reiter
- Department of Biomedical Informatics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Thomas H. Hampton
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Casey S. Greene
- Department of Biomedical Informatics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Deborah A. Hogan
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
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Ghosh D, Mangar P, Choudhury A, Kumar A, Saha A, Basu P, Saha D. Characterization of a hemolytic and antibiotic-resistant Pseudomonas aeruginosa strain S3 pathogenic to fish isolated from Mahananda River in India. PLoS One 2024; 19:e0300134. [PMID: 38547304 PMCID: PMC10977779 DOI: 10.1371/journal.pone.0300134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/21/2024] [Indexed: 04/02/2024] Open
Abstract
Virulent strain Pseudomonas aeruginosa isolated from Mahananda River exhibited the highest hemolytic activity and virulence factors and was pathogenic to fish as clinical signs of hemorrhagic spots, loss of scales, and fin erosions were found. S3 was cytotoxic to the human liver cell line (WRL-68) in the trypan blue dye exclusion assay. Genotype characterization using whole genome analysis showed that S3 was similar to P. aeruginosa PAO1. The draft genome sequence had an estimated length of 62,69,783 bp, a GC content of 66.3%, and contained 5916 coding sequences. Eight genes across the genome were predicted to be related to hemolysin action. Antibiotic resistance genes such as class C and class D beta-lactamases, fosA, APH, and catB were detected, along with the strong presence of multiple efflux system genes. This study shows that river water is contaminated by pathogenic P. aeruginosa harboring an array of virulence and antibiotic resistance genes which warrants periodic monitoring to prevent disease outbreaks.
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Affiliation(s)
- Dipanwita Ghosh
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Preeti Mangar
- Department of Botany, University of North Bengal, Siliguri, West Bengal, India
| | - Abhinandan Choudhury
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Anoop Kumar
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Aniruddha Saha
- Department of Botany, University of North Bengal, Siliguri, West Bengal, India
| | - Protip Basu
- Department of Botany, Siliguri College, West Bengal, India
| | - Dipanwita Saha
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
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Longo M, Lelchat F, Le Baut V, Rioual S, Faÿ F, Lescop B, Hellio C. Tracking of Bacteriophage Predation on Pseudomonas aeruginosa Using a New Radiofrequency Biofilm Sensor. SENSORS (BASEL, SWITZERLAND) 2024; 24:2042. [PMID: 38610253 PMCID: PMC11013890 DOI: 10.3390/s24072042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/15/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024]
Abstract
Confronting the challenge of biofilm resistance and widespread antimicrobial resistance (AMR), this study emphasizes the need for innovative monitoring methods and explores the potential of bacteriophages against bacterial biofilms. Traditional methods, like optical density (OD) measurements and confocal microscopy, crucial in studying biofilm-virus interactions, often lack real-time monitoring and early detection capabilities, especially for biofilm formation and low bacterial concentrations. Addressing these gaps, we developed a new real-time, label-free radiofrequency sensor for monitoring bacteria and biofilm growth. The sensor, an open-ended coaxial probe, offers enhanced monitoring of bacterial development stages. Tested on a biological model of bacteria and bacteriophages, our results indicate the limitations of traditional OD measurements, influenced by factors like sedimented cell fragments and biofilm formation on well walls. While confocal microscopy provides detailed 3D biofilm architecture, its real-time monitoring application is limited. Our novel approach using radio frequency measurements (300 MHz) overcomes these shortcomings. It facilitates a finer analysis of the dynamic interaction between bacterial populations and phages, detecting real-time subtle changes. This method reveals distinct phases and breakpoints in biofilm formation and virion interaction not captured by conventional techniques. This study underscores the sensor's potential in detecting irregular viral activity and assessing the efficacy of anti-biofilm treatments, contributing significantly to the understanding of biofilm dynamics. This research is vital in developing effective monitoring tools, guiding therapeutic strategies, and combating AMR.
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Affiliation(s)
- Matthieu Longo
- Univ Brest, Lab-STICC, CNRS, UMR 6285, F-29200 Brest, France; (M.L.); (S.R.)
- Univ Brest, BIODIMAR/LEMAR, CNRS, UMR 6539, F-29200 Brest, France;
| | - Florian Lelchat
- Leo Viridis, 245 Rue René Descartes, F-29280 Plouzané, France; (F.L.); (V.L.B.)
| | - Violette Le Baut
- Leo Viridis, 245 Rue René Descartes, F-29280 Plouzané, France; (F.L.); (V.L.B.)
| | - Stéphane Rioual
- Univ Brest, Lab-STICC, CNRS, UMR 6285, F-29200 Brest, France; (M.L.); (S.R.)
| | - Fabienne Faÿ
- Laboratoire de Biotechnologie et Chimie Marines, Centre de Recherche Saint Maudé, Université Européenne de Bretagne, Université de Bretagne-Sud, F-56321 Lorient, France;
| | - Benoit Lescop
- Univ Brest, Lab-STICC, CNRS, UMR 6285, F-29200 Brest, France; (M.L.); (S.R.)
| | - Claire Hellio
- Univ Brest, BIODIMAR/LEMAR, CNRS, UMR 6539, F-29200 Brest, France;
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Manohar P, Loh B, Turner D, Tamizhselvi R, Mathankumar M, Elangovan N, Nachimuthu R, Leptihn S. In vitro and in vivo evaluation of the biofilm-degrading Pseudomonas phage Motto, as a candidate for phage therapy. Front Microbiol 2024; 15:1344962. [PMID: 38559352 PMCID: PMC10978715 DOI: 10.3389/fmicb.2024.1344962] [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: 11/27/2023] [Accepted: 02/22/2024] [Indexed: 04/04/2024] Open
Abstract
Infections caused by Pseudomonas aeruginosa are becoming increasingly difficult to treat due to the emergence of strains that have acquired multidrug resistance. Therefore, phage therapy has gained attention as an alternative to the treatment of pseudomonal infections. Phages are not only bactericidal but occasionally show activity against biofilm as well. In this study, we describe the Pseudomonas phage Motto, a T1-like phage that can clear P. aeruginosa infections in an animal model and also exhibits biofilm-degrading properties. The phage has a substantial anti-biofilm activity against strong biofilm-producing isolates (n = 10), with at least a twofold reduction within 24 h. To demonstrate the safety of using phage Motto, cytotoxicity studies were conducted with human cell lines (HEK 293 and RAW 264.7 macrophages). Using a previously established in vivo model, we demonstrated the efficacy of Motto in Caenorhabditis elegans, with a 90% survival rate when treated with the phage at a multiplicity of infection of 10.
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Affiliation(s)
- Prasanth Manohar
- School of Bioscience and Technology, Vellore Institute of Technology (VIT), Vellore, India
| | - Belinda Loh
- Department of Vaccines and Infection Models, Fraunhofer Institute for Cell Therapy and Immunology (IZI), Leipzig, Germany
| | - Dann Turner
- School of Applied Sciences, College of Health, Science and Society, University of the West of England, Bristol, United Kingdom
| | - Ramasamy Tamizhselvi
- School of Bioscience and Technology, Vellore Institute of Technology (VIT), Vellore, India
| | - Marimuthu Mathankumar
- School of Bioscience and Technology, Vellore Institute of Technology (VIT), Vellore, India
| | - Namasivayam Elangovan
- Department of Biotechnology, School of Bioscience, Periyar University, Salem, Tamil Nadu, India
| | - Ramesh Nachimuthu
- School of Bioscience and Technology, Vellore Institute of Technology (VIT), Vellore, India
| | - Sebastian Leptihn
- Department of Biochemistry, Health and Medical University, Erfurt, Germany
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
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Zhang X, Wang Y, Li S, Xie F, Yi H. Simulated drug disposition in critically ill patients to evaluate effective PK/PD targets for combating Pseudomonas aeruginosa resistance to meropenem. Antimicrob Agents Chemother 2024; 68:e0154123. [PMID: 38319075 PMCID: PMC10916391 DOI: 10.1128/aac.01541-23] [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: 11/22/2023] [Accepted: 01/13/2024] [Indexed: 02/07/2024] Open
Abstract
Bacterial infections, including those caused by Pseudomonas aeruginosa, often lead to sepsis, necessitating effective antibiotic treatment like carbapenems. The key pharmacokinetic/pharmacodynamic (PK/PD) index correlated to carbapenem efficacy is the fraction time of unbound plasma concentration above the minimum inhibitory concentration (MIC) of the pathogen (%fT > MIC). While multiple targets exist, determining the most effective one for critically ill patients remains a matter of debate. This study evaluated meropenem's bactericidal potency and its ability to combat drug resistance in Pseudomonas aeruginosa under three representative PK/PD targets: 40% fT > MIC, 100% fT > MIC, and 100% fT > 4× MIC. The hollow fiber infection model (HFIM) was constructed, validated, and subsequently inoculated with a substantial Pseudomonas aeruginosa load (1 × 108 CFU/mL). Different meropenem regimens were administered to achieve the specified PK/PD targets. At specified intervals, samples were collected from the HFIM system and subjected to centrifugation. The resulting supernatant was utilized to determine drug concentrations, while the precipitates were used to track changes in both total and drug-resistant bacterial populations over time by the spread plate method. The HFIM accurately reproduced meropenem's pharmacokinetics in critically ill patients. All three PK/PD target groups exhibited a rapid bactericidal response within 6 h of the initial treatment. However, the 40% fT > MIC and 100% fT > MIC groups subsequently showed bacterial resurgence and resistance, whereas the 100% fT > 4× MIC group displayed sustained bactericidal activity with no evidence of drug resistance. The HFIM system revealed that maintaining 100% fT > 4× MIC offers a desirable microbiological response for critically ill patients, demonstrating strong bactericidal capacity and effective prevention of drug resistance.
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Affiliation(s)
- Xiaonan Zhang
- Division of Biopharmaceutics and Pharmacokinetics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, China
| | - Yan Wang
- Yueyang Inspection and Testing Center, Yueyang, China
| | - Sanwang Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Feifan Xie
- Division of Biopharmaceutics and Pharmacokinetics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, China
| | - Hanxi Yi
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, China
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Zhang J, Li T, Tao S, Shen M. Microplastic pollution interaction with disinfectant resistance genes: research progress, environmental impacts, and potential threats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:16241-16255. [PMID: 38340302 DOI: 10.1007/s11356-024-32225-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Abstract
The consumption of disposable plastic products and disinfectants has surged during the global COVID-19 pandemic, as they play a vital role in effectively preventing and controlling the spread of the virus. However, microplastic pollution and the excessive or improper use of disinfectants contribute to the increased environmental tolerance of microorganisms. Microplastics play a crucial role as vectors for microorganisms and plankton, facilitating energy transfer and horizontal gene exchange. The increase in the use of disinfectants has become a driving force for the growth of disinfectant resistant bacteria (DRB). A large number of microorganisms can have intense gene exchange, such as plasmid loss and capture, phage transduction, and cell fusion. The reproduction and diffusion rate of DRB in the environment is significantly higher than that of ordinary microorganisms, which will greatly increase the environmental tolerance of DRB. Unfortunately, there is still a huge knowledge gap in the interaction between microplastics and disinfectant resistance genes (DRGs). Accordingly, it is critical to comprehensively summarize the formation and transmission routes of DRGs on microplastics to address the problem. This paper systematically analyzed the process and mechanisms of DRGs formed by microbes. The interaction between microplastics and DRGs and the contribution of microplastic on the diffusion and spread of DRGs were expounded. The potential threats to the ecological environment and human health were also discussed. Additionally, some challenges and future priorities were also proposed with a view to providing useful basis for further research.
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Affiliation(s)
- Jiahao Zhang
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui, 243002, People's Republic of China
| | - Tianhao Li
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui, 243002, People's Republic of China
| | - Shiyu Tao
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui, 243002, People's Republic of China
| | - Maocai Shen
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui, 243002, People's Republic of China.
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Hernández-García M, Cabello M, Ponce-Alonso M, Herrador-Gómez PM, Gioia F, Cobo J, Cantón R, Ruiz-Garbajosa P. First detection in Spain of NDM-1-producing Pseudomonas aeruginosa in two patients transferred from Ukraine to a university hospital. J Glob Antimicrob Resist 2024; 36:105-111. [PMID: 38159724 DOI: 10.1016/j.jgar.2023.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024] Open
Abstract
OBJECTIVES Carbapenemase-mediated carbapenem resistance in Pseudomonas aeruginosa is a relevant health problem. We detected for the first time in Spain two clinical NDM-producing P. aeruginosa (NDM-Pa) isolates in two Ukrainian patients admitted to our hospital between April and August 2022. METHODS Antimicrobial susceptibility was studied by microdilution and MIC gradient strips (EUCAST-2022 criteria). Carbapenemase genes were detected by the Xpert Carba-R and immunochromatography assays. WGS (Illumina and Oxford-Nanopore) was also performed. RESULTS In May 2022, we detected an NDM-Pa in a sternotomy wound in a patient. In June-2022, a second NDM-Pa along with an OXA-48-Klebsiella pneumoniae (OXA-48-Kp) isolate was detected in a mandibular abscess from an unrelated patient. Moreover, an NDM+OXA-48-K. pneumoniae (NDM+OXA-48-Kp) was also found in a rectal sample of this patient. Both patients had undergone surgery in Ukraine before their transfer to our hospital. NDM-Pa isolates were resistant to all tested antimicrobials with the exception of aztreonam (MIC = 8 mg/L), colistin (MIC =2 mg/L) and cefiderocol (MIC range = 0.75-2 mg/L). WGS confirmed that both P. aeruginosa isolates were NDM-1 producers, belonged to ST773 and shared an identical resistome. blaNDM-1 was located on a ∼117-Kb chromosomally integrated integrative conjugative element (ICE). OXA-48-Kp and NDM+OXA-48-Kp belonged to ST147 and contained blaOXA-48 on an identical ∼300-Kb IncHIB-plasmid. blaNDM-1 was located on a 51-Kb IncFIB-plasmid only found in NDM+OXA-48-Kp. CONCLUSIONS This is the first description of NDM-Pa in Spain. We highlight the threat of further cross-border dissemination of NDM-1 through P. aeruginosa along with K. pneumoniae high-risk clones also carrying OXA-48, which draws a complex epidemiological scenario.
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Affiliation(s)
- Marta Hernández-García
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain; CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Margarita Cabello
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Manuel Ponce-Alonso
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain; CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Pedro M Herrador-Gómez
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain; CIBER de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Francesca Gioia
- Servicio de Enfermedades Infecciosas, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Javier Cobo
- CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain; Servicio de Enfermedades Infecciosas, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Rafael Cantón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain; CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain.
| | - Patricia Ruiz-Garbajosa
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain; CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
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49
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Liu L, Zhu L, Hu C, Zhu S, Ye S. Rare Cases of Pseudomonas aeruginosa Meningitis in Children: 10-Year Experience in a Single Center. J Child Neurol 2024; 39:113-121. [PMID: 38488459 DOI: 10.1177/08830738241239703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
OBJECTIVE The primary objective was to elucidate the epidemiologic characteristics, risk determinants, and clinical outcomes associated with Pseudomonas aeruginosa-induced meningitis. METHODS All cases of meningitis caused by Pseudomonas aeruginosa that were treated at the hospital between 2012 and 2022 were retrospectively analyzed and detailed. RESULTS During a 10-year period, only 10 patients satisfied the inclusion criteria. Three patients had previously undergone neurosurgical procedures and 4 patients had leukemia. CONCLUSIONS Although Pseudomonas aeruginosa meningitis possesses a low incidence rate, the rate of mortality is high. Patients with leukemia or those who have undergone neurosurgery are the most susceptible to diagnosis. Cases of severe neutropenia present only mild or no cerebrospinal fluid pleocytosis. In patients with sensitive Pseudomonas aeruginosa meningitis, the timely use of anti-Pseudomonas carbapenems for intravenous treatment is highly effective. For drug-resistant Pseudomonas aeruginosa meningitis, intrathecal polymyxins administration can be an effective treatment option.
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Affiliation(s)
- Lijun Liu
- Department of Pediatric Intensive Care Unit, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Lvchang Zhu
- Department of Pediatric Intensive Care Unit, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Chanchan Hu
- Department of Pediatric Intensive Care Unit, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Shuzhen Zhu
- Department of Emergency, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Sheng Ye
- Department of Pediatric Intensive Care Unit, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
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Delgado-Valverde M, Portillo-Calderón I, Alcalde-Rico M, Conejo MC, Hidalgo C, Del Toro Esperón C, Pascual Á. Activity of imipenem/relebactam and comparators against KPC-producing Klebsiella pneumoniae and imipenem-resistant Pseudomonas aeruginosa. Eur J Clin Microbiol Infect Dis 2024; 43:445-457. [PMID: 38157139 PMCID: PMC10917868 DOI: 10.1007/s10096-023-04735-1] [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: 05/23/2023] [Accepted: 12/05/2023] [Indexed: 01/03/2024]
Abstract
PURPOSE Relebactam is a novel β-lactamase inhibitor, which, when combined with imipenem/cilastatin, is active against both class A and class C β-lactamases. To evaluate in vitro antimicrobial activity of imipenem/relebactam against a collection of recent clinical isolates of carbapenem-non-susceptible P. aeruginosa and K. pneumoniae ST258 and ST512 KPC producers belonging to different lineages from hospitals in Southern Spain. METHODS Six hundred and seventy-eight isolates were tested: 265 K. pneumoniae (230 ST512/KPC-3 and 35 ST258/KPC-3) and 413 carbapenem-non-susceptible P. aeruginosa. Imipenem, piperacillin/tazobactam, ceftazidime, cefepime, aztreonam, ceftolozane/tazobactam, meropenem, amikacin, ciprofloxacin, colistin, and ceftazidime/avibactam were used as comparators against P. aeruginosa. Against K. pneumoniae ceftazidime, cefepime, aztreonam, and ceftolozane/tazobactam were not tested, and tigecycline was studied instead. MICs were determined in duplicate by broth microdilution according to EUCAST guidelines. RESULTS Imipenem/relebactam displayed potent in vitro activity against both sequence types of KPC-3-producing K. pneumoniae. MIC50 and MIC90 values were 0.25 mg/L and 1 mg/L, respectively, with percent of susceptible isolates >97%. Only three K. pneumoniae ST512/KPC-3 isolates and one ST258/KPC-3 were resistant to imipenem/relebactam. Relebactam sensitized 98.5% of K. pneumoniae isolates resistant to imipenem. The activity of imipenem/relebactam against P. aeruginosa was moderate (susceptibility rate: 62.7%). Analysis of the acquired and mutational resistome of isolates with high levels of resistance to imipenem/relebactam has not shown a clear association between them. CONCLUSION Imipenem/relebactam showed excellent activity against K. pneumoniae KPC-3. The activity of imipenem/relebactam against imipenem-resistant P. aeruginosa was moderate.
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Affiliation(s)
- Mercedes Delgado-Valverde
- UGC Enfermedades Infecciosas y Microbiología Clínica, Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen Macarena/CSIC/Universidad de Sevilla, Sevilla, Spain.
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas (CIBERINFEC), Sevilla, Spain.
| | - Inés Portillo-Calderón
- UGC Enfermedades Infecciosas y Microbiología Clínica, Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen Macarena/CSIC/Universidad de Sevilla, Sevilla, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas (CIBERINFEC), Sevilla, Spain
| | - Manuel Alcalde-Rico
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas (CIBERINFEC), Sevilla, Spain
- Instituto de Biomedicina de Sevilla, Hospital Universitario Virgen Macarena, CSIC, Universidad de Sevilla, Sevilla, Spain
| | - M Carmen Conejo
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
| | - Carmen Hidalgo
- UGC Enfermedades Infecciosas y Microbiología Clínica, Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen Macarena/CSIC/Universidad de Sevilla, Sevilla, Spain
| | | | - Álvaro Pascual
- UGC Enfermedades Infecciosas y Microbiología Clínica, Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen Macarena/CSIC/Universidad de Sevilla, Sevilla, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas (CIBERINFEC), Sevilla, Spain
- Departamento de Microbiología, Universidad de Sevilla, Sevilla, Spain
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