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Pumirat P, Santajit S, Tunyong W, Kong-Ngoen T, Tandhavanant S, Lohitthai S, Rungruengkitkun A, Chantratita N, Ampawong S, Reamtong O, Indrawattana N. Impact of AbaI mutation on virulence, biofilm development, and antibiotic susceptibility in Acinetobacter baumannii. Sci Rep 2024; 14:21521. [PMID: 39277662 PMCID: PMC11401864 DOI: 10.1038/s41598-024-72740-1] [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: 05/17/2024] [Accepted: 09/10/2024] [Indexed: 09/17/2024] Open
Abstract
The quorum sensing (QS) system mediated by the abaI gene in Acinetobacter baumannii is crucial for various physiological and pathogenic processes. In this study, we constructed a stable markerless abaI knockout mutant (ΔabaI) strain using a pEXKm5-based allele replacement method to investigate the impact of abaI on A. baumannii. Proteomic analysis revealed significant alterations in protein expression between the wild type (WT) and ΔabaI mutant strains, particularly in proteins associated with membrane structure, antibiotic resistance, and virulence. Notably, the downregulation of key outer membrane proteins such as SurA, OmpA, OmpW, and BamA suggests potential vulnerabilities in outer membrane integrity, which correlate with structural abnormalities in the ΔabaI mutant strain, including irregular cell shapes and compromised membrane integrity, observed by scanning and transmission electron microscopy. Furthermore, diminished expression of regulatory proteins such as OmpR and GacA-GacS highlights the broader regulatory networks affected by abaI deletion. Functional assays revealed impaired biofilm formation and surface-associated motility in the mutant strain, indicative of altered colonization capabilities. Interestingly, the mutant showed a complex antibiotic susceptibility profile. While it demonstrated increased susceptibility to membrane-targeting antibiotics, its response to beta-lactams was more nuanced. Despite increased expression of metallo-beta-lactamase (MBL) superfamily proteins and DcaP-like protein, the mutant unexpectedly showed lower MICs for carbapenems (imipenem and meropenem) compared to the wild-type strain. This suggests that abaI deletion affects antibiotic susceptibility through multiple, potentially competing mechanisms. Further investigation is needed to fully elucidate the interplay between quorum sensing, antibiotic resistance genes, and overall antibiotic susceptibility in A. baumannii. Our findings underscore the multifaceted role of the abaI gene in modulating various cellular processes and highlight its significance in A. baumannii physiology, pathogenesis, and antibiotic resistance. Targeting the abaI QS system may offer novel therapeutic strategies for this clinically significant pathogen.
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Affiliation(s)
- Pornpan Pumirat
- Department of Microbiology and Immunology, Mahidol University, Bangkok, Thailand
| | - Sirijan Santajit
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, Thailand
| | - Witawat Tunyong
- Department of Microbiology and Immunology, Mahidol University, Bangkok, Thailand
| | - Thida Kong-Ngoen
- Department of Microbiology and Immunology, Mahidol University, Bangkok, Thailand
| | - Sarunporn Tandhavanant
- Department of Microbiology and Immunology, Mahidol University, Bangkok, Thailand
- Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Sanisa Lohitthai
- Department of Microbiology and Immunology, Mahidol University, Bangkok, Thailand
| | | | - Narisara Chantratita
- Department of Microbiology and Immunology, Mahidol University, Bangkok, Thailand
| | - Sumate Ampawong
- Department of Tropical Pathology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Onrapak Reamtong
- Department of Tropical Molecular Biology and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Nitaya Indrawattana
- Biomedical Research Incubator Unit, Department of Research, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
- Department of Research, Siriraj Center of Research Excellence in Allergy and Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Sauvat L, Verhoeven PO, Gagnaire J, Berthelot P, Paul S, Botelho-Nevers E, Gagneux-Brunon A. Vaccines and monoclonal antibodies to prevent healthcare-associated bacterial infections. Clin Microbiol Rev 2024; 37:e0016022. [PMID: 39120140 PMCID: PMC11391692 DOI: 10.1128/cmr.00160-22] [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] [Indexed: 08/10/2024] Open
Abstract
SUMMARYHealthcare-associated infections (HAIs) represent a burden for public health with a high prevalence and high death rates associated with them. Pathogens with a high potential for antimicrobial resistance, such as ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) and Clostridioides difficile, are responsible for most HAIs. Despite the implementation of infection prevention and control intervention, globally, HAIs prevalence is stable and they are mainly due to endogenous pathogens. It is undeniable that complementary to infection prevention and control measures, prophylactic approaches by active or passive immunization are needed. Specific groups at-risk (elderly people, chronic condition as immunocompromised) and also healthcare workers are key targets. Medical procedures and specific interventions are known to be at risk of HAIs, in addition to hospital environmental exposure. Vaccines or monoclonal antibodies can be seen as attractive preventive approaches for HAIs. In this review, we present an overview of the vaccines and monoclonal antibodies in clinical development for prevention of the major bacterial HAIs pathogens. Based on the current state of knowledge, we look at the challenges and future perspectives to improve prevention by these means.
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Affiliation(s)
- Léo Sauvat
- CIRI - Centre International de Recherche en Infectiologie, GIMAP team, Inserm, U1111, CNRS, UMR5308, ENS Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Faculty of Medicine, Université Jean Monnet St-Etienne, St-Etienne, France
- Infection Control Unit, University Hospital of Saint-Etienne, Saint-Etienne, France
- Department of Infectious Diseases, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Paul O Verhoeven
- CIRI - Centre International de Recherche en Infectiologie, GIMAP team, Inserm, U1111, CNRS, UMR5308, ENS Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Faculty of Medicine, Université Jean Monnet St-Etienne, St-Etienne, France
- Department of Infectious Agents and Hygiene, University-Hospital of Saint-Etienne, Saint-Etienne, France
| | - Julie Gagnaire
- Infection Control Unit, University Hospital of Saint-Etienne, Saint-Etienne, France
- Department of Infectious Diseases, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Philippe Berthelot
- CIRI - Centre International de Recherche en Infectiologie, GIMAP team, Inserm, U1111, CNRS, UMR5308, ENS Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Faculty of Medicine, Université Jean Monnet St-Etienne, St-Etienne, France
- Infection Control Unit, University Hospital of Saint-Etienne, Saint-Etienne, France
- Department of Infectious Diseases, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Stéphane Paul
- CIRI - Centre International de Recherche en Infectiologie, GIMAP team, Inserm, U1111, CNRS, UMR5308, ENS Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Faculty of Medicine, Université Jean Monnet St-Etienne, St-Etienne, France
- CIC 1408 Inserm, Axe vaccinologie, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Elisabeth Botelho-Nevers
- CIRI - Centre International de Recherche en Infectiologie, GIMAP team, Inserm, U1111, CNRS, UMR5308, ENS Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Faculty of Medicine, Université Jean Monnet St-Etienne, St-Etienne, France
- Department of Infectious Diseases, University Hospital of Saint-Etienne, Saint-Etienne, France
- CIC 1408 Inserm, Axe vaccinologie, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Amandine Gagneux-Brunon
- CIRI - Centre International de Recherche en Infectiologie, GIMAP team, Inserm, U1111, CNRS, UMR5308, ENS Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Faculty of Medicine, Université Jean Monnet St-Etienne, St-Etienne, France
- Department of Infectious Diseases, University Hospital of Saint-Etienne, Saint-Etienne, France
- CIC 1408 Inserm, Axe vaccinologie, University Hospital of Saint-Etienne, Saint-Etienne, France
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3
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Abid R, Khan M, Siddique N, Khan SW, Khan RU, Zahoor M, Ullah R, Alotaibi A. Novel chiral phthalimides: Antimicrobial evaluation and docking study against Acinetobacter baumannii's OmpA protein. Comput Biol Med 2024; 182:109099. [PMID: 39265475 DOI: 10.1016/j.compbiomed.2024.109099] [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: 04/08/2024] [Revised: 08/29/2024] [Accepted: 08/31/2024] [Indexed: 09/14/2024]
Abstract
Antibiotics have been a vital component in the fight against microbial diseases for over 75 years, saving countless lives. However, the global rise of multi-drug-resistance (MDR) bacterial infections is pushing us closer to a post-antibiotic era where common infections may once again become lethal. To combat MDR Acinetobacter baumannii, we investigated chiral phthalimides and used molecular docking to identify potential targets. Outer membrane protein A (OmpA) is crucial for A. baumannii resistant to antibiotics, making it a pathogen of great concern due to its high mortality rate and limited treatment options. In this study, we evaluated three distinct compounds against the OmpA protein: FIA (2-(1,3-dioxoindolin-2yl)-3-phenylpropanoic acid), FIC (2-(1,3-dioxoindolin-2yl)-4-(methylthio) butanoic acid), and FII (3-(1,3-dioxoindolin-2yl)-3-phenylpropanoic acid). Molecular docking results showed that these three compounds exhibited strong interactions with the OmpA protein. Molecular dynamics (MD) simulation analysis further confirmed the stability and binding efficacy of these compounds with OmpA. Their antimicrobial activities were assessed using the agar well diffusion method, revealing that FIA had an optimal zone of inhibition of 24 mm. Additionally, the minimum inhibitory concentrations (MIC) of these compounds were determined, demonstrating their bactericidal properties against A. baumannii, with MICs of 11 μg/μL for FIA, 46 μg/μL for FIC, and 375 μg/μL for FII. In vitro cytotoxicity data indicated that none of the three compounds were hemolytic when exposed to human red blood cells. This finding is particularly significant as it highlights the superior efficacy of FIA against A. baumannii compared to the other compounds. With thorough pharmacokinetic validations, these chiral phthalimides are promising alternative therapeutic options for treating infections caused by A. baumannii, offering new hope in the face of rising antibiotic resistance.
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Affiliation(s)
- Rimsha Abid
- Institute of Pathology and Diagnostic Medicine, Department of Microbiology, Khyber Medical University, Peshawar, Khyber Pakhtunkhwa, Pakistan.
| | - Momin Khan
- Institute of Pathology and Diagnostic Medicine, Department of Microbiology, Khyber Medical University, Peshawar, Khyber Pakhtunkhwa, Pakistan.
| | - Nayyer Siddique
- Institute of Pathology and Diagnostic Medicine, Department of Microbiology, Khyber Medical University, Peshawar, Khyber Pakhtunkhwa, Pakistan.
| | - Sher Wali Khan
- Department of Chemistry, Rawalpindi Women University, Rawalpindi, 46300, Pakistan.
| | - Rahat Ullah Khan
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID, Chinese Academy of Sciences, 100101, Beijing, China; College of Life Science, University of Chinese Academy of Sciences, Beijing, 101408, China.
| | - Muhammad Zahoor
- Department of Biochemistry, University of Malakand, Chakdara, 18800, Pakistan.
| | - Riaz Ullah
- Medicinal Aromatic and Poisonous Plants Research Center, Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia.
| | - Amal Alotaibi
- Department of Basic Science, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia.
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Dessenne C, Ménart B, Acket S, Dewulf G, Guerardel Y, Vidal O, Rossez Y. Lipidomic analyses reveal distinctive variations in homeoviscous adaptation among clinical strains of Acinetobacter baumannii, providing insights from an environmental adaptation perspective. Microbiol Spectr 2024:e0075724. [PMID: 39254344 DOI: 10.1128/spectrum.00757-24] [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: 03/22/2024] [Accepted: 08/07/2024] [Indexed: 09/11/2024] Open
Abstract
Acinetobacter baumannii is known for its antibiotic resistance and is increasingly found outside of healthcare settings. To survive colder temperatures, bacteria, including A. baumannii, adapt by modifying glycerophospholipids (GPL) to maintain membrane flexibility. This study examines the lipid composition of six clinical A. baumannii strains, including the virulent AB5075, at two temperatures. At 18°C, five strains consistently show an increase in palmitoleic acid (C16:1), while ABVal2 uniquely shows an increase in oleic acid (C18:1). LC-HRMS2 analysis identifies shifts in GPL and glycerolipid composition between 18°C and 37°C, highlighting variations in phosphatidylethanolamine (PE) and phosphatidylglycerol (PG) lipids. ABVal2 shows increased PE with C18:1 and C16:1 at 18°C, but no change in PG, in contrast to other strains that show increased PE and PG with C16:1. Notably, although A. baumannii typically lacks FabA, a key enzyme for unsaturated fatty acid synthesis, this enzyme was found in both ABVal2 and ABVal3. In addition, ABVal2 contains five candidate desaturases that may contribute to its lipid profile. The study also reveals variations in strain motility and biofilm formation over temperature. These findings enhance our understanding of A. baumannii's physiological adaptations, survival strategies and ecological fitness in different environments.IMPORTANCEAcinetobacter baumannii, a bacterium known for its resistance to antibiotics, is a concern in healthcare settings. This study focused on understanding how this bacterium adapts to different temperatures and how its lipid composition changes. Lipids are the building blocks of cell membranes. By studying these changes, scientists can gain insights into how the bacterium survives and behaves in various environments. This understanding improves our understanding of its global dissemination capabilities. The results of the study contribute to our broader understanding of how Acinetobacter baumannii works, which is important for developing strategies to combat its impact on patient health.
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Affiliation(s)
- Clara Dessenne
- Université Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Benoît Ménart
- Centre Hospitalier de valenciennes, Laboratoire de Biologie Hygiène-service de Microbiologie, Valenciennes, France
| | - Sébastien Acket
- Université de technologie de Compiègne, UPJV, UMR CNRS 7025, Enzyme and Cell Engineering, Centre de recherche Royallieu, Compiègne Cedex, Compiègne, France
| | - Gisèle Dewulf
- Centre Hospitalier de valenciennes, Laboratoire de Biologie Hygiène-service de Microbiologie, Valenciennes, France
| | - Yann Guerardel
- Université Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
- Institute for Glyco-core Research (iGCORE), Gifu University, Gifu, Japan
| | - Olivier Vidal
- Université Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Yannick Rossez
- Université Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
- Université de technologie de Compiègne, UPJV, UMR CNRS 7025, Enzyme and Cell Engineering, Centre de recherche Royallieu, Compiègne Cedex, Compiègne, France
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5
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Covvey JR, Guarascio AJ. Sulbactam-durlobactam for the treatment of Acinetobacter baumannii-calcoaceticus complex. Expert Rev Anti Infect Ther 2024:1-10. [PMID: 39234753 DOI: 10.1080/14787210.2024.2400703] [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: 07/15/2024] [Revised: 08/28/2024] [Accepted: 08/31/2024] [Indexed: 09/06/2024]
Abstract
INTRODUCTION Infections with Acinetobacter baumannii-calcoaceticus complex (ABC) pose difficulty for clinicians given a limited arsenal of effective antimicrobials. Sulbactam/durlobactam provides a novel treatment option for patients experiencing hospital- or ventilator-acquired pneumonia with susceptible strains. AREAS COVERED This review provides a comprehensive discussion of sulbactam/durlobactam, including basic characteristics, in vitro activity, and clinical trial data supporting its use for the treatment of ABC. Manufacturer's data, published literature to date, and conference data are utilized in this review. EXPERT OPINION Sulbactam/durlobactam offers clinicians a new and effective treatment option for resistant ABC infection. Sulbactam, when combined with durlobactam, displays enhanced potency against ABC isolates, which has translated into positive clinical outcomes observed in clinical trials and post-marketing case studies. Although overall treatment indications and clinical experience are limited to date, sulbactam/durlobactam offers a familiar and favorable safety profile in comparison with alternative agents. Factors associated with use of combination antibiotic therapy, availability of commercial drug susceptibility testing, and cost-effectiveness are all currently key considerations for sulbactam/durlobactam use.
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Affiliation(s)
- Jordan R Covvey
- Division of Pharmaceutical, Administrative and Social Sciences, Duquesne University School of Pharmacy, Pittsburgh, PA, USA
| | - Anthony J Guarascio
- Division of Pharmacy Practice, Duquesne University School of Pharmacy, Pittsburgh, PA, USA
- Department of Pharmacy, Allegheny General Hospital, Pittsburgh, PA, USA
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Tayabali AF, Dirieh Y, Groulx E, Elfarawi N, Di Fruscio S, Melanson K, Moteshareie H, Al-Gafari M, Navarro M, Bernatchez S, Demissie Z, Anoop V. Survival and virulence of Acinetobacter baumannii in microbial mixtures. BMC Microbiol 2024; 24:324. [PMID: 39243004 PMCID: PMC11378493 DOI: 10.1186/s12866-024-03471-6] [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: 05/28/2024] [Accepted: 08/20/2024] [Indexed: 09/09/2024] Open
Abstract
Acinetobacter species such as A. venetianus and A. guillouiae have been studied for various biotechnology applications, including bioremediation of recalcitrant and harmful environmental contaminants, as well as bioengineering of enzymes and diagnostic materials. Bacteria used in biotechnology are often combined with other microorganisms in mixtures to formulate efficacious commercial products. However, if the mixture contained a closely related Acinetobacter pathogen such as A. baumannii (Ab), it remains unclear whether the survival and virulence of Ab would be masked or augmented. This uncertainty poses a challenge in ensuring the safety of such biotechnology products, since Ab is one of the most significant pathogens for both hospital and community -acquired infections. This research aimed to investigate the growth and virulence of Ab within a mixture of 11 bacterial species formulated as a mock microbial mixture (MM). Growth challenges with environmental stressors (i.e., temperature, pH, sodium, iron, and antibiotics) revealed that Ab could thrive under diverse conditions except in the presence of ciprofloxacin. When cultured alone, Ab exhibited significantly more growth in the presence of almost all the environmental stressors than when it was co-incubated with the MM. During the exposure of A549 lung epithelial cells to the MM, Ab growth was stimulated compared to that in standard mammalian culture media. Cytotoxicity caused by Ab was suppressed in the presence of the MM. Lymphocytes were significantly reduced in mice exposed to Ab with or without MM via intravenous injection. The levels of the splenic cytokines IL-1α, IL-1β, MCP-1, and MIP-1α were significantly reduced 24 h after exposure to Ab + MM. This study demonstrated that the presence of the MM marginally but significantly reduced the growth and virulence of Ab, which has implications for the safety of mixtures of microorganisms for biotechnological applications. Furthermore, these findings expand our understanding of the virulence of Ab during host-pathogen interactions.
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Affiliation(s)
- Azam F Tayabali
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada.
| | - Yasmine Dirieh
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Emma Groulx
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Nusaybah Elfarawi
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Sabrina Di Fruscio
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Kristina Melanson
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Houman Moteshareie
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Mustafa Al-Gafari
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Martha Navarro
- Scientific Services Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Stéphane Bernatchez
- Biotechnology Sections 1 and 2, New Substances Assessment and Control Bureau, Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Zerihun Demissie
- Biotechnology Sections 1 and 2, New Substances Assessment and Control Bureau, Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Valar Anoop
- Biotechnology Sections 1 and 2, New Substances Assessment and Control Bureau, Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, K1A 0K9, Canada
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Lin L, Li L, Yang X, Hou L, Wu D, Wang B, Ma B, Liao X, Yan X, Gad M, Su J, Liu Y, Liu K, Hu A. Unnoticed antimicrobial resistance risk in Tibetan cities unveiled by sewage metagenomic surveillance: Compared to the eastern Chinese cities. JOURNAL OF HAZARDOUS MATERIALS 2024; 479:135730. [PMID: 39243538 DOI: 10.1016/j.jhazmat.2024.135730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 08/26/2024] [Accepted: 08/31/2024] [Indexed: 09/09/2024]
Abstract
Sewage surveillance is a cost-effective tool for assessing antimicrobial resistance (AMR) in urban populations. However, research on sewage AMR in remote areas is still limited. Here, we used shotgun metagenomic sequencing to profile antibiotic resistance genes (ARGs) and ARG-carrying pathogens (APs) across 15 cities in Tibetan Plateau (TP) and the major cities in eastern China. Notable regional disparities in sewage ARG composition were found, with a significantly higher ARG abundance in TP (2.97 copies/cell). A total of 542 and 545 APs were identified in sewage from TP and the East, respectively, while more than 40 % carried mobile genetic elements (MGEs). Moreover, 65 MGEs-carrying APs were identified as World Health Organization (WHO) priority-like bacterial and fungal pathogens. Notably, a fungal zoonotic pathogen, Enterocytozoon bieneusi, was found for the first time to carry a nitroimidazole resistance gene (nimJ). Although distinct in AP compositions, the relative abundances of APs were comparable in these two regions. Furthermore, sewage in TP was found to be comparable to the cities in eastern China in terms of ARG mobility and AMR risks. These findings provide insights into ARGs and APs distribution in Chinese sewage and stress the importance of AMR surveillance and management strategies in remote regions.
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Affiliation(s)
- Laichang Lin
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Laiyi Li
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyong Yang
- School of Environmental and Material Engineering, Yantai University, Yantai 264005, China
| | - Liyuan Hou
- Department of Civil and Environmental Engineering, Utah State University, Logan, UT 84322, United States; Utah Water Research Laboratory, 1600 Canyon Road, Logan, UT 84321, United States
| | - Dong Wu
- Key Laboratory for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, Shanghai 200241, China
| | - Binhao Wang
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Bin Ma
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xin Liao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuhang Yan
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Life Sciences, Hebei University, Baoding 071002, China
| | - Mahmoud Gad
- Water Pollution Research Department, National Research Centre, Cairo 12622, Egypt
| | - Jianqiang Su
- Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yongqin Liu
- Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou 730000, China; State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Keshao Liu
- State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Anyi Hu
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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8
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Panji Z, Nadoushan MJ, Fekrirad Z, Rasooli I. Modulation with anti-Oma87 antibodies of cytotoxicity, adherence, and internalization of Acinetobacter baumannii in human cervical carcinoma epithelial cells. APMIS 2024. [PMID: 39223818 DOI: 10.1111/apm.13465] [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: 07/01/2024] [Accepted: 08/12/2024] [Indexed: 09/04/2024]
Abstract
BamA, an Omp85 superfamily member, is universally conserved and essential for cell viability. Using anti-Oma87 antibodies, we focus on understanding the effect of Oma87 of Acinetobacter baumannii on pathogenicity. Oma87 was expressed, purified, and used to induce anti-Oma87 antibodies in BALB/c mice. Acute toxicity of the protein was evaluated in mice. HeLa cells were infected with both live and killed A. baumannii 19606 and a clinical isolate. The effects of anti-Oma87 sera on A. baumannii adherence, internalization, and proliferation in HeLa cells were studied. The roles of microfilaments and microtubules in A. baumannii invasion were demonstrated by Actin disruption. Reduced bacterial population and biofilm formation were noted. The ability of A. baumannii to provoke autophagy through Oma87 induction leads to incomplete autophagy and potentially facilitates bacterial replication. Actin-mediated uptake, attachment, and invasion demonstrated A. baumannii survival and multiplication within vacuoles in the host cell. The findings underscore the potential of Oma87 as a therapeutic intervention target in infections caused by A. baumannii. This comprehensive analysis contributes valuable information for understanding the virulence mechanisms of A. baumannii, potentially guiding future strategies to combat infections caused by this pathogen.
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Affiliation(s)
- Zahra Panji
- Department of Biology, Shahed University, Tehran, Iran
| | - Mohammadreza Jalali Nadoushan
- Department of Pathology, School of Medicine, Shahed University, Tehran, Iran
- Molecular Microbiology Research Center and Department of Biology, Shahed University, Tehran, Iran
| | | | - Iraj Rasooli
- Department of Biology, Shahed University, Tehran, Iran
- Molecular Microbiology Research Center and Department of Biology, Shahed University, Tehran, Iran
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9
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Machingauta A, Mukanganyama S. Antibacterial Activity and Proposed Mode of Action of Extracts from Selected Zimbabwean Medicinal Plants against Acinetobacter baumannii. Adv Pharmacol Pharm Sci 2024; 2024:8858665. [PMID: 39220823 PMCID: PMC11364482 DOI: 10.1155/2024/8858665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 06/27/2024] [Accepted: 08/01/2024] [Indexed: 09/04/2024] Open
Abstract
Acinetobacter baumannii was identified by the WHO as a priority pathogen in which the research and development of new antibiotics is urgently needed. Plant phytochemicals have potential as sources of new antimicrobials. The objective of the study was to determine the antibacterial activity of extracts of selected Zimbabwean medicinal plants against A. baumannii and determine their possible mode of action. Extracts were prepared from the leaves of the eight plants including the bark of Erythrina abyssinica using solvents of different polarities. Antibacterial activity was evaluated using the microbroth dilution method coupled with the in vitro iodonitrotetrazolium colorimetric assay. The effect of the extracts on membrane integrity was determined by quantifying the amount of protein and nucleic acid leaked from the cells after exposure to the extracts. The effects of the extracts on biofilms were investigated. Toxicity studies were carried out using sheep erythrocytes and murine peritoneal cells. Seven out of eight evaluated plant extracts were found to have antibacterial activity. The Combretum apiculatum acetonie (CAA) extract showed the highest inhibitory activity against A. baumannii with a minimal inhibitory concentration of 125 µg/mL. The minimum inhibitory concentration (MIC) of the CAA extract caused a protein leakage of 32 µg/mL from A. baumannii. The Combretum apiculatum acetonie (CAA), C. apiculatum methanolic (CAM), Combretum zeyheri methanolic (CZM), and Erythrina abyssinica methanolic (EAM) extracts inhibited A. baumannii biofilm formation. The EAM extract was shown to disrupt mature biofilms. The potent extracts were nontoxic to sheep erythrocytes and mouse peritoneal cells. The activities shown by the extracts indicate that the plants have potential as sources of effective antibacterial and antibiofilm formation agents against A. baumannii.
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Affiliation(s)
- Auxillia Machingauta
- Bio-Molecular Interactions Analyses GroupDepartment of Biotechnology and BiochemistryUniversity of Zimbabwe, Mt Pleasant, P.O. Box 167, Harare, Zimbabwe
| | - Stanley Mukanganyama
- Department of TherapeuticsNatural Products Research UnitAfrican Institute of Biomedical Science and TechnologyWilkins Hospital, Block C, Corner J. Tongogara and R. Tangwena, Harare, Zimbabwe
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10
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Xu Y, Zhu F, Zhou Z, Ma S, Zhang P, Tan C, Luo Y, Qin R, Chen J, Pan P. A novel mRNA multi-epitope vaccine of Acinetobacter baumannii based on multi-target protein design in immunoinformatic approach. BMC Genomics 2024; 25:791. [PMID: 39160492 PMCID: PMC11334330 DOI: 10.1186/s12864-024-10691-7] [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: 05/13/2024] [Accepted: 08/06/2024] [Indexed: 08/21/2024] Open
Abstract
Acinetobacter baumannii is a gram-negative bacillus prevalent in nature, capable of thriving under various environmental conditions. As an opportunistic pathogen, it frequently causes nosocomial infections such as urinary tract infections, bacteremia, and pneumonia, contributing to increased morbidity and mortality in clinical settings. Consequently, developing novel vaccines against Acinetobacter baumannii is of utmost importance. In our study, we identified 10 highly conserved antigenic proteins from the NCBI and UniProt databases for epitope mapping. We subsequently screened and selected 8 CTL, HTL, and LBL epitopes, integrating them into three distinct vaccines constructed with adjuvants. Following comprehensive evaluations of immunological and physicochemical parameters, we conducted molecular docking and molecular dynamics simulations to assess the efficacy and stability of these vaccines. Our findings indicate that all three multi-epitope mRNA vaccines designed against Acinetobacter baumannii are promising; however, further animal studies are required to confirm their reliability and effectiveness.
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Affiliation(s)
- Yizhong Xu
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fei Zhu
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ziyou Zhou
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shiyang Ma
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Peipei Zhang
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Caixia Tan
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuying Luo
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Rongliu Qin
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jie Chen
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China.
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China.
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China.
| | - Pinhua Pan
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China.
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China.
- Department of Infection Control Center of Xiangya Hospital, Central South University, Changsha, Hunan, China.
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11
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Thitirungreangchai T, Roytrakul S, Aunpad R. Deciphering the Intracellular Action of the Antimicrobial Peptide A11 via an In-Depth Analysis of Its Effect on the Global Proteome of Acinetobacter baumannii. ACS Infect Dis 2024; 10:2795-2813. [PMID: 39075773 PMCID: PMC11320580 DOI: 10.1021/acsinfecdis.4c00160] [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: 02/28/2024] [Revised: 07/17/2024] [Accepted: 07/17/2024] [Indexed: 07/31/2024]
Abstract
The potential antimicrobial activity and low propensity to induce the development of bacterial resistance have rendered antimicrobial peptides (AMPs) as novel and ideal candidate therapeutic agents for the treatment of infections caused by drug-resistant pathogenic bacteria. The targeting of bacterial membranes by AMPs has been typically considered their sole mode of action; however, increasing evidence supports the existence of multiple and complementary functions of AMPs that result in bacterial death. An in-depth characterization of their mechanism of action could facilitate further research and development of AMPs with higher potency. The current study employs biophysics and proteomics approaches to unveil the mechanisms underlying the antibacterial activity of A11, a potential candidate AMP, against Acinetobacter baumannii, a leading cause of hospital-acquired infections (HAIs) and consequently, a serious global threat. A11 peptide was found to induce membrane depolarization to a high extent, as revealed by flow cytometry and electron microscopy analyses. The prompt intracellular penetration of A11 peptide, observed using confocal microscopy, was found to occur concomitantly with a very low degree of membrane lysis, suggesting that its mode of action predominantly involves a nonlytic killing mechanism. Quantitative proteomics analysis employed for obtaining insights into the mechanisms underlying the antimicrobial activity of A11 peptide revealed that it disrupted energy metabolism, interfered with protein homeostasis, and inhibited fatty acid synthesis that is essential for cell membrane integrity; all these impacted the cellular functions of A. baumannii. A11 treatment also impacted signal transduction associated with the regulation of biofilm formation, hindered the stress response, and influenced DNA repair processes; these are all crucial survival mechanisms of A. baumannii. Additionally, robust antibacterial activity was exhibited by A11 peptide against multidrug-resistant (MDR) and extensively drug-resistant (XDR) clinical isolates of A. baumannii; moreover, A11 peptide exhibited synergy with levofloxacin and minocycline as well as low propensity for inducing resistance. Taken together, the findings emphasize the therapeutic potential of A11 peptide as an antibacterial agent against drug-resistant A. baumannii and underscore the need for further investigation.
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Affiliation(s)
- Thanit Thitirungreangchai
- Graduate
Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, Pathum Thani 12120, Thailand
| | - Sittiruk Roytrakul
- Functional
Proteomics Technology Laboratory, National Center for Genetic Engineering
and Biotechnology, National Science and
Technology Development Agency, Khlong Luang, Pathum Thani 12120, Thailand
| | - Ratchaneewan Aunpad
- Graduate
Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, Pathum Thani 12120, Thailand
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12
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Yoon JG, Lim S, Hyun HJ, Seong H, Noh JY, Song JY, Kim WJ, Cheong HJ. Respiratory microbiome and clinical course of carbapenem-resistant Acinetobacter baumannii pneumonia in critically Ill patients. Medicine (Baltimore) 2024; 103:e38988. [PMID: 39093794 PMCID: PMC11296444 DOI: 10.1097/md.0000000000038988] [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] [Received: 05/14/2024] [Accepted: 06/28/2024] [Indexed: 08/04/2024] Open
Abstract
Carbapenem-resistant Acinetobacter baumannii (CRAB) pneumonia has been a serious problem in the intensive care unit (ICU). However, defined characteristics of respiratory microbiome in CRAB pneumonia are lacking nowadays. This study aimed to analyze respiratory microbiome of CRAB pneumonia compared to non-CRAB pneumonia and reveal the clinical significance of respiratory microbiome data in these patients. Patients diagnosed with severe pneumonia with mechanical ventilation were enrolled in the ICU of a tertiary care hospital. Respiratory specimens were collected on days 1, 4, 7, and 14 in each participant via tracheal aspiration. Clinical data and outcomes of each enrolled patient were collected via electronic medical records. Microbiome analysis was conducted with collected respiratory specimens undergone by next-generation sequencing of microbial 16S ribosomal DNA. Six CRAB pneumonia, 4 non-CRAB pneumonia and 5 healthy controls were enrolled. In CRAB pneumonia, CRAB was detected in 3 patients by sputum culture at day 1, while it was negative at day 1 and detected later in the others by follow-up sputum culture. Beta diversity plot analysis showed differences between each group. Shannon index was decreased markedly at day 4 in CRAB pneumonia compared to the others. Among CRAB pneumonia cases, 3 respiratory specimens were culture-negative, but positive by microbiome analysis. Lower respiratory microbiome in CRAB pneumonia had distinct characteristics and early loss of diversity compared to non-CRAB pneumonia, which might be related to poor clinical course. Moreover, CRAB acquisition and colonization would be predicted by preemptive microbiome analysis, which will contribute to effective infection control in the ICU.
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Affiliation(s)
- Jin Gu Yoon
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sooyeon Lim
- Asia Pacific Influenza Institute, Korea University College of Medicine, Seoul, Republic of Korea
- Vaccine Innovation Center-KU Medicine, Seoul, Republic of Korea
| | - Hak-Jun Hyun
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Hye Seong
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Ji Yun Noh
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
- Asia Pacific Influenza Institute, Korea University College of Medicine, Seoul, Republic of Korea
- Vaccine Innovation Center-KU Medicine, Seoul, Republic of Korea
| | - Joon Young Song
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
- Asia Pacific Influenza Institute, Korea University College of Medicine, Seoul, Republic of Korea
- Vaccine Innovation Center-KU Medicine, Seoul, Republic of Korea
| | - Woo Joo Kim
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
- Asia Pacific Influenza Institute, Korea University College of Medicine, Seoul, Republic of Korea
- Vaccine Innovation Center-KU Medicine, Seoul, Republic of Korea
| | - Hee Jin Cheong
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
- Asia Pacific Influenza Institute, Korea University College of Medicine, Seoul, Republic of Korea
- Vaccine Innovation Center-KU Medicine, Seoul, Republic of Korea
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13
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Koner S, Chen JS, Hseu ZY, Chang EH, Chen KY, Asif A, Hsu BM. An inclusive study to elucidation the heavy metals-derived ecological risk nexus with antibiotic resistome functional shape of niche microbial community and their carbon substrate utilization ability in serpentine soil. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 366:121688. [PMID: 38971059 DOI: 10.1016/j.jenvman.2024.121688] [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: 03/11/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/08/2024]
Abstract
Heavy metals (HMs) contained terrestrial ecosystems are often significantly display the antibiotic resistome in the pristine area due to increasing pressure from anthropogenic activity, is complex and emerging research interest. This study investigated that impact of chromium (Cr), nickel (Ni), cobalt (Co) concentrations in serpentine soil on the induction of antibiotic resistance genes and antimicrobial resistance within the native bacterial community as well as demonstrated their metabolic fingerprint. The full-length 16S-rRNA amplicon sequencing observed an increased abundance of Firmicutes, Actinobacteriota, and Acidobacteriota in serpentine soil. The microbial community in serpentine soil displayed varying preferences for different carbon sources, with some, such as carbohydrates and carboxylic acids, being consistently favored. Notably, 27 potential antibiotic resistance opportunistic bacterial genera have been identified in different serpentine soils. Among these, Lapillicoccus, Rubrobacter, Lacibacter, Chloroplast, Nitrospira, Rokubacteriales, Acinetobacter, Pseudomonas were significantly enriched in high and medium HMs concentrated serpentine soil samples. Functional profiling results illustrated that vancomycin resistance pathways were prevalent across all groups. Additionally, beta-lactamase, aminoglycoside, tetracycline, and vancomycin resistance involving specific bio-maker genes (ampC, penP, OXA, aacA, strB, hyg, aph, tet(A/B), otr(C), tet(M/O/Q), van(A/B/D), and vanJ) were the most abundant and enriched in the HMs-contaminated serpentine soil. Overall, this study highlighted that heavy-metal enriched serpentine soil is potential to support the proliferation of bacterial antibiotic resistance in native microbiome, and might able to spread antibiotic resistance to surrounding environment.
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Affiliation(s)
- Suprokash Koner
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi County, Taiwan; Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Jung-Sheng Chen
- Department of Medical Research, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan
| | - Zeng-Yei Hseu
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Ed-Haun Chang
- Department of Nursing, MacKay Junior College of Medicine, Nursing and Management, Beitou, Taipei, Taiwan
| | - Kuang-Ying Chen
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi County, Taiwan
| | - Aslia Asif
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi County, Taiwan; Doctoral Program in Science, Technology, Environment, and Mathematics, National Chung Cheng University, Chiayi County, Taiwan
| | - Bing-Mu Hsu
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi County, Taiwan.
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14
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Chávez Rodríguez M, Mascareñas De Los Santos AH, Vaquera Aparicio DN, Aguayo Samaniego R, García Pérez R, Siller-Rodríguez D, Rosales-González SP, Castillo-Morales PL, Castillo Bejarano JI. Molecular epidemiology of carbapenemase encoding genes in A. baumannii-calcoaceticus complex infections in children: a systematic review. JAC Antimicrob Resist 2024; 6:dlae098. [PMID: 39005591 PMCID: PMC11242458 DOI: 10.1093/jacamr/dlae098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 05/29/2024] [Indexed: 07/16/2024] Open
Abstract
Background Acinetobacter baumannii-calcoaeticus complex is the leader pathogen for the World Health Organization's list due to the escalating prevalence of multidrug-resistant strains. Insights into the molecular characterization of carbapenemase genes in A. baumannii-calcoaceticus complex infections among children are scarce. To address this gap, we conducted a systematic review to describe the molecular epidemiology of the carbapenemase genes in A. baumannii-calcoaceticus complex infections in the pediatric population. Methods Adhering to the PRISMA 2020 guidelines for reporting systematic reviews, we conducted a review of in chore bibliographic databases published in English and Spanish, between January 2020 and December 2022. All studies conducted in patients ≤6 years with molecular characterization of carbapenemase-encoding genes in A. baumannii-calcoaceticus infections were included. Results In total, 1129 cases were reviewed, with an overall carbapenem-resistance rate of 60.3%. A. baumannii-calcoaceticus was isolated from blood cultures in 66.6% of cases. Regionally, the Eastern Mediterranean exhibited the highest prevalence of carbapenem resistance (88.3%). Regarding the carbapenemase genes, blaKPC displayed an overall prevalence of 1.2%, while class B blaNDM had a prevalence of 10.9%. Class D blaOXA-23-like reported a prevalence of 64%, blaOXA-48 and blaOXA-40 had a prevalence of 33% and 18.1%, respectively. Notably, the Americas region showed a prevalence of blaOXA-23-like at 91.6%. Conclusion Our work highlights the high prevalence of carbapenem-resistant A. baumannii-calcoaceticus and class D carbapenemase genes in children. Of note the distribution of different carbapenemase genes reveals considerable variations across WHO regions. To enhance epidemiological understanding, further extensive studies in children are imperative.
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Affiliation(s)
- Mariana Chávez Rodríguez
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - Abiel Homero Mascareñas De Los Santos
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - Denisse Natalie Vaquera Aparicio
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - Rebeca Aguayo Samaniego
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - Rodrigo García Pérez
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - Daniel Siller-Rodríguez
- Hospital Epidemiology and Surveillance Unit, Christus Muguerza Hospital Alta Especialidad, Hidalgo Avenue, Obispado, ZC 64060 Monterrey, México
| | - Sara Paulina Rosales-González
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - Patricia Lizeth Castillo-Morales
- Department of Endocrinology, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
| | - José Iván Castillo Bejarano
- Department of Pediatrics/Infectious Diseases Service, Hospital Universitario “Dr. José Eleuterio González”, Universidad Autónoma de Nuevo León, Francisco I. Madero Avenue, Mitras Centro, ZC 64460 Monterrey, México
- Hospital Epidemiology and Surveillance Unit, Christus Muguerza Hospital Alta Especialidad, Hidalgo Avenue, Obispado, ZC 64060 Monterrey, México
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15
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Negahdari B, Sarkoohi P, Ghasemi Nezhad F, Shahbazi B, Ahmadi K. Design of multi-epitope vaccine candidate based on OmpA, CarO and ZnuD proteins against multi-drug resistant Acinetobacter baumannii. Heliyon 2024; 10:e34690. [PMID: 39149030 PMCID: PMC11324976 DOI: 10.1016/j.heliyon.2024.e34690] [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: 09/10/2023] [Revised: 07/12/2024] [Accepted: 07/15/2024] [Indexed: 08/17/2024] Open
Abstract
Acinetobacter baumannii has been identified as a major cause of nosocomial infections. Acinetobacter infections are often difficult to treat with multidrug resistant phenotypes. One of the most effective ways to combat infectious diseases is through vaccination. In this study, an attempt was made to select the most protective and potent immunostimulatory epitopes based on the epitope-rich domains of the ZnuD, OmpA and CarO proteins of Acinetobacter baumannii to design a vaccine that can protect against this infection. After predicting the epitope of B- and T-cells, seven antigenic regions of three proteins CarO, ZnuD and OmpA, were selected. These regions were bound by a GGGS linker. The binding affinity and molecular interactions of the vaccine with the immune receptors TLR2 and TLR4 were studied using molecular docking analysis. This vaccine design was subjected to in silico immune simulations using C-ImmSim. The designed vaccine was highly antigenic, non-allergenic and stable. TLR2 and TLR4 were selected to analyze the ability of the modeled chimeric protein to interact with immune system receptors. The results showed strong interaction between the designed protein vaccine with TLR2 (-18.8 kcal mol-1) and TLR4 (-15.1 kcal mol-1). To verify the stability of the interactions and the structure of the designed protein, molecular dynamics (MD) simulations were performed for 200 ns. Various analyses using MD showed that the protein structure is stable alone and in interaction with TLR2 and TLR4. The ability of the vaccine candidate protein to stimulate the immune system to produce the necessary cytokines and antibodies against Acinetobacter baumannii was also demonstrated by the ability of the protein designed using the C-ImmSim web server to induce an immune response. Therefore, the designed protein vaccine may be a suitable candidate for in vivo as well as in vitro studies against Acinetobacter baumannii infections.
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Affiliation(s)
- Batul Negahdari
- Student Research Committee, Faculty of Pharmacy, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Parisa Sarkoohi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Forozan Ghasemi Nezhad
- Student Research Committee, Faculty of Pharmacy, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Behzad Shahbazi
- School of Pharmacy, Semnan University of Medical Sciences, Semnan, Iran
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Khadijeh Ahmadi
- Infectious and Tropical Diseases Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
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16
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Wei P, Sun W, Hao S, Deng L, Zou W, Wu H, Lu W, He Y. Dietary Supplementation of Crossbred Pigs with Glycerol, Vitamin C, and Niacinamide Alters the Composition of Gut Flora and Gut Flora-Derived Metabolites. Animals (Basel) 2024; 14:2198. [PMID: 39123724 PMCID: PMC11311027 DOI: 10.3390/ani14152198] [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: 06/28/2024] [Revised: 07/24/2024] [Accepted: 07/26/2024] [Indexed: 08/12/2024] Open
Abstract
The addition of glycerin, vitamin C, and niacinamide to pig diets increased the redness of longissimus dorsi; however, it remains unclear how these supplements affect gut microbiota and metabolites. A total of 84 piglets (20.35 ± 2.14 kg) were randomly allotted to groups A (control), B (glycerin-supplemented), C (vitamin C and niacinamide-supplemented), and D (glycerin, vitamin C and niacinamide-supplemented) during a feeding experiment. Metagenomic and metabolomic technologies were used to analyze the fecal compositions of bile acids, metabolites, and microbiota. The results showed that compared to pigs in group A, pigs in group D had lower virulence factor expressions of lipopolysaccharide (p < 0.05), fatty acid resistance system (p < 0.05), and capsule (p < 0.01); higher fecal levels of ferric ion (p < 0.05), allolithocholic acid (p < 0.01), deoxycholic acid (p < 0.05), tauroursodeoxycholic acid dihydrate (p < 0.01), glycodeoxycholic acid (p < 0.05), L-proline (p < 0.01) and calcitriol (p < 0.01); and higher (p < 0.05) abundances of iron-acquiring microbiota (Methanobrevibacter, Clostridium, Clostridiaceae, Clostridium_sp_CAG_1000, Faecalibacterium_sp_CAG_74_58_120, Eubacteriales_Family_XIII_Incertae_Sedis, Alistipes_sp_CAG_435, Alistipes_sp_CAG_514 and Methanobrevibacter_sp_YE315). Supplementation with glycerin, vitamin C, and niacinamide to pigs significantly promoted the growth of iron-acquiring microbiota in feces, reduced the expression of some virulence factor genes of fecal pathogens, and increased the fecal levels of ferric ion, L-proline, and some secondary bile acids. The administration of glycerol, vitamin C, and niacinamide to pigs may serve as an effective measure for muscle redness improvement by altering the compositions of fecal microbiota and metabolites.
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Affiliation(s)
- Panting Wei
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Wenchen Sun
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Shaobin Hao
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Linglan Deng
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Wanjie Zou
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Huadong Wu
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Wei Lu
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Yuyong He
- Jiangxi Province Key Laboratory of Animal Nutrition and Feed, Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China; (P.W.); (W.S.); (S.H.); (L.D.); (W.Z.); (W.L.)
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
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17
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Chen J, Wang Y, Zhang N, Li J, Liu X. Genotypic and phenotypic characteristics of Acinetobacter baumannii isolates from the people's hospital of Qingyang City, Gansu province. BMC Genomics 2024; 25:727. [PMID: 39060939 PMCID: PMC11282657 DOI: 10.1186/s12864-024-10601-x] [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: 08/04/2023] [Accepted: 07/08/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND Acinetobacter baumannii (A. baumannii) is a common opportunistic pathogen in hospitals that causes nosocomial infection. In order to understand the phenotypic and genotypic characteristics of A. baumannii isolates, we sequenced and analyzed 62 A. baumannii isolates from a hospital in Gansu province. RESULTS Non-repeated 62 A. baumannii isolates were collected from August 2015 to November 2021. Most isolates (56/62) were resistant to multiple drugs. All the 62 A. baumannii isolates were resistant to aztreonam and contained blaADC-25 gene which exists only on chromosome contigs. The 62 isolates in this study were not clustered in a single clade, but were dispersed among multiple clades in the common genome. Seven sequence types were identified by Multilocus sequence type (MLST) analysis and most isolates (52/62) belonged to ST2. The plasmids were grouped into 11 clusters by MOB-suite. CONCLUSIONS This study furthers the understanding of A. baumannii antimicrobial-resistant genotypes, and may aid in prevention and control nosocomial infection caused by drug-resistant A. baumannii.
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Affiliation(s)
- Jiali Chen
- Chinese PLA Center for Disease Control and Prevention, Beijing, 100071, China
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Yang Wang
- Chinese PLA Center for Disease Control and Prevention, Beijing, 100071, China
| | - Na Zhang
- Chinese PLA Center for Disease Control and Prevention, Beijing, 100071, China
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100101, China
| | - Juan Li
- Department of Clinical Laboratory Medicine, Qingyang People's Hospital, Qingyang, Gansu, 745000, China.
| | - Xiong Liu
- Chinese PLA Center for Disease Control and Prevention, Beijing, 100071, China.
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18
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Hernández-Durán M, Colín-Castro CA, Fernández-Rodríguez D, Delgado G, Morales-Espinosa R, Martínez-Zavaleta MG, Shekhar C, Ortíz-Álvarez J, García-Contreras R, Franco-Cendejas R, López-Jácome LE. Inside-out, antimicrobial resistance mediated by efflux pumps in clinical strains of Acinetobacter baumannii isolated from burn wound infections. Braz J Microbiol 2024:10.1007/s42770-024-01461-4. [PMID: 39044104 DOI: 10.1007/s42770-024-01461-4] [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: 02/27/2024] [Accepted: 07/11/2024] [Indexed: 07/25/2024] Open
Abstract
Acinetobacter baumannii belongs to the ESKAPE group. It is classified as a critical priority group by the World Health Organization and a global concern on account of its capacity to acquire and develop resistance mechanisms to multiple antibiotics. Data from the United States indicates 500 deaths annually. Resistance mechanisms of this bacterium include enzymatic pathways such as ß-lactamases, carbapenemases, and aminoglycoside-modifying enzymes, decreased permeability, and overexpression of efflux pumps. A. baumannii has been demonstrated to possess efflux pumps, which are classified as members of the MATE family, RND and MFS superfamilies, and SMR transporters. The aim of our work was to assess the distribution of efflux pumps and their regulatory gene expression in clinical strains of A. baumannii isolated from burned patients. METHODS: From the Clinical Microbiology Laboratory at the Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra collection in Mexico, 199 strains were selected. Antibiotics susceptibilities were performed by broth microdilutions to determine minimal inhibitory concentrations. Phenotypic assays with efflux pump inhibitors were conducted using carbonyl cyanide 3-chlorophenylhydrazone (CCCP) and phenylalanine-arginine ß-naphthylamide (PAßN) in conjunction with amikacin, ceftazidime, imipenem, meropenem and levofloxacin. A search was conducted for structural genes that are linked to efflux pumps, and the relative expression of the adeR, adeS, and adeL genes was analyzed. RESULTS: Among a total of 199 strains, 186 exhibited multidrug resistance (MDR). Fluoroquinolones demonstrated the highest resistance rates, while minocycline and amikacin displayed comparatively reduced resistance rates (1.5 and 28.1, respectively). The efflux activity of fluorquinolones exhibited the highest phenotypic detection (from 85 to 100%), while IMP demonstrated the lowest activity of 27% with PAßN and 43.3% with CCCP. Overexpression was observed in adeS and adeL, with adeR exhibiting overexpression. Concluding that clinical strains of A. baumannii from our institution exhibited efflux pumps as one of the resistance mechanisms.
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Affiliation(s)
- Melissa Hernández-Durán
- Laboratorio de Microbiología Clínica, División de Infectología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Claudia Adriana Colín-Castro
- Laboratorio de Microbiología Clínica, División de Infectología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Diana Fernández-Rodríguez
- Laboratorio de Microbiología Clínica, División de Infectología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
- Plan de Estudios Combinados en Medicina (PECEM) MD/PhD, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Gabriela Delgado
- Laboratorio de Genómica Bacteriana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Rosario Morales-Espinosa
- Laboratorio de Genómica Bacteriana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - María Guadalupe Martínez-Zavaleta
- Laboratorio de Microbiología Clínica, División de Infectología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Chandra Shekhar
- College of Medicine, The University of Tennessee Health Science Center, Memphis, USA
| | - Jossue Ortíz-Álvarez
- Ciencias y Tecnologías (CONAHCYT), Programa "Investigadoras E Investigadores Por México". Consejo Nacional de Humanidades, Mexico City, Mexico
| | - Rodolfo García-Contreras
- Laboratorio de Bacteriología, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Rafael Franco-Cendejas
- Biomedical Research Subdirection, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Luis Esaú López-Jácome
- Laboratorio de Microbiología Clínica, División de Infectología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico.
- Departamento de Biología. Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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Huang X, Ning N, Li D, Chen S, Zhang L, Wang H, Bao C, Yang X, Li B, Wang H. Molecular epidemiology of Acinetobacter baumannii during COVID-19 at a hospital in northern China. Ann Clin Microbiol Antimicrob 2024; 23:63. [PMID: 39026334 PMCID: PMC11264759 DOI: 10.1186/s12941-024-00716-0] [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: 09/21/2023] [Accepted: 06/10/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND The wide spread of carbapenem-resistance clones of Acinetobacter baumannii has made it a global public problem. Some studies have shown that the prevalence of Acinetobacter baumannii clones can change over time. However, few studies with respect to the change of epidemiological clones in Acinetobacter baumannii during Corona Virus Disease 2019 (COVID-19) were reported. This study aims to investigate the molecular epidemiology and resistance mechanisms of Acinetobacter baumannii during COVID-19. RESULTS A total of 95 non-replicated Acinetobacter baumannii isolates were enrolled in this study, of which 60.0% (n = 57) were identified as carbapenem-resistant Acinetobacter baumannii (CRAB). The positive rate of the blaOXA-23 gene in CRAB isolates was 100%. A total of 28 Oxford sequence types (STs) were identified, of which the most prevalent STs were ST540 (n = 13, 13.7%), ST469 (n = 13, 13.7%), ST373 (n = 8, 8.4%), ST938 (n = 7, 7.4%) and ST208 (n = 6, 6.3%). Differently, the most widespread clone of Acinetobacter baumannii in China during COVID-19 was ST208 (22.1%). Further study of multidrug-resistant ST540 showed that all of them were carrying blaOXA-23, blaOXA-66, blaADC-25 and blaTEM-1D, simultaneously, and first detected Tn2009 in ST540. The blaOXA-23 gene was located on transposons Tn2006 or Tn2009. In addition, the ST540 strain also contains a drug-resistant plasmid with msr(E), armA, sul1 and mph(E) genes. CONCLUSION The prevalent clones of Acinetobacter baumannii in our organization have changed during COVID-19, which was different from that of China. ST540 strains which carried multiple drug-resistant mobile elements was spreading, indicating that it is essential to strengthen the molecular epidemiology of Acinetobacter baumannii.
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Affiliation(s)
- Xinlin Huang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, No. 20 Dongda Street, Fengtai District, Beijing, 100071, China
- Department of Clinical Laboratory, the Fifth Medical Center, Chinese Peoples's Liberation Army (PLA) General Hospital, No. 100 Western 4th Middle Ring Road, Beijing, 100039, China
- School of Medical Laboratory, Weifang Medical University, Weifang, 261053, China
| | - Nianzhi Ning
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, No. 20 Dongda Street, Fengtai District, Beijing, 100071, China
| | - Deyu Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, No. 20 Dongda Street, Fengtai District, Beijing, 100071, China
| | - Suming Chen
- Department of Clinical Laboratory, the Fifth Medical Center, Chinese Peoples's Liberation Army (PLA) General Hospital, No. 100 Western 4th Middle Ring Road, Beijing, 100039, China
| | - Liangyan Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, No. 20 Dongda Street, Fengtai District, Beijing, 100071, China
| | - Huan Wang
- Department of Clinical Laboratory, the Fifth Medical Center, Chinese Peoples's Liberation Army (PLA) General Hospital, No. 100 Western 4th Middle Ring Road, Beijing, 100039, China
| | - Chunmei Bao
- Department of Clinical Laboratory, the Fifth Medical Center, Chinese Peoples's Liberation Army (PLA) General Hospital, No. 100 Western 4th Middle Ring Road, Beijing, 100039, China
| | - Xiaolan Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, No. 20 Dongda Street, Fengtai District, Beijing, 100071, China
| | - Boan Li
- Department of Clinical Laboratory, the Fifth Medical Center, Chinese Peoples's Liberation Army (PLA) General Hospital, No. 100 Western 4th Middle Ring Road, Beijing, 100039, China.
- School of Medical Laboratory, Weifang Medical University, Weifang, 261053, China.
| | - Hui Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, No. 20 Dongda Street, Fengtai District, Beijing, 100071, China.
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20
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Chen YW. Current scenario of indole hybrids with antibacterial potential against Acinetobacter baumannii pathogens: A mini-review. Arch Pharm (Weinheim) 2024:e2400440. [PMID: 38986447 DOI: 10.1002/ardp.202400440] [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: 05/31/2024] [Revised: 06/26/2024] [Accepted: 06/27/2024] [Indexed: 07/12/2024]
Abstract
Acinetobacter baumannii with the capability to "escape" almost all currently available antibacterials is eroding the safety of basic medical interventions and is an increasing cause of mortality globally, prompting a substantial requirement for new classes of antibacterial agents. Indoles participate in the regulation of persistent bacterial formation, biofilm formation, plasmid stability, and drug resistance. In particular, indole hybrids demonstrated promising antibacterial activity against both drug-sensitive and drug-resistant A. baumannii pathogens, representing a fertile source for the discovery of novel therapeutic agents for clinical deployment in controlling A. baumannii infections. This mini-review outlines the current innovations of indole hybrids with antibacterial activity against A. baumannii pathogens, covering articles published from 2020 to the present, to open new avenues for exploring novel anti-A. baumannii candidates.
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Affiliation(s)
- Yi-Wen Chen
- Department of Internal Medicine, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, China
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21
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Ijaz S, Ansari F, Nawaz M, Ejaz H, Anjum AA, Saeed A, Ali T, Rehman OU, Fatima E, Ijaz T. Genomic Insights into and In Vitro Evaluation of Antimicrobial Combination Therapies for Carbapenem-Resistant Acinetobacter baumannii. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:1086. [PMID: 39064515 PMCID: PMC11278937 DOI: 10.3390/medicina60071086] [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: 05/19/2024] [Revised: 06/25/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024]
Abstract
Background and Objectives: Acinetobacter baumannii (A. baumannii), particularly carbapenem-resistant A. baumannii (CRAB), represents a grave concern in healthcare settings and is associated with high mortality. This study aimed to conduct molecular, mutational, and phylogenetic analyses of specific genes in CRAB and evaluate the synergistic effects of selected antimicrobial combinations. Materials and Methods: Phenotypic characterization was performed on six CRAB strains by using the Modified Hodge Test (MHT) and IMP-EDTA Double-Disc Synergy Test (IMP-EDTA DDST). Carbapenemase- and metallo-beta-lactamase-encoding genes were amplified by using Polymerase Chain Reaction. Phylogenetic analysis using the MEGA 11 tool was used to determine the evolutionary relatedness of these genes. Mutational analysis was performed by using I-Mutant, MUPro, and PHD-SNP bioinformatics tools to predict mutations in the carbapenemase-encoding genes. Microdilution checkerboard titration assessed the synergistic effects of antimicrobial combinations (azithromycin-meropenem, rifampicin-meropenem, meropenem-colistin, and azithromycin-colistin) on these CRAB isolates. Results: The phenotypic characterization of six CRAB isolates revealed positive results for MHT and IMP-EDTA DDST. The molecular characterization revealed that carbapenemase- and MBL-encoding genes were present in all isolates with varying frequencies, including blaOXA-51 (100%) and blaIMP (0%). The sequence analysis revealed high evolutionary relatedness to sequences in the NCBI database. The mutational analysis identified 16 mutations, of which 1 mutation (P116L) in the blaOXA-58 gene predicted a change in the protein product, potentially contributing to carbapenem resistance. The checkerboard titration method did not reveal any synergism among the tested antimicrobial combinations against CRAB. Conclusion: This study's findings underscore the significant challenges posed by CRAB isolates harboring multiple resistant genes in treatment. This highlights the urgent need for novel antimicrobial agents, a crucial step towards reducing mortality rates not only in Pakistan but also globally.
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Affiliation(s)
- Saadia Ijaz
- Institute of Molecular Biology & Biotechnology (IMBB), University of Lahore, Lahore 54590, Pakistan
| | - Farheen Ansari
- Institute of Molecular Biology & Biotechnology (IMBB), University of Lahore, Lahore 54590, Pakistan
| | - Muhammad Nawaz
- Institute of Microbiology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Hasan Ejaz
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia
| | - Aftab Ahmad Anjum
- Institute of Microbiology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Aqib Saeed
- Institute of Microbiology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Tehreem Ali
- Institute of Microbiology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Obaid Ur Rehman
- Department of Medicine, Services Institute of Medical Sciences, Lahore 54000, Pakistan
| | - Eeshal Fatima
- Department of Medicine, Services Institute of Medical Sciences, Lahore 54000, Pakistan
| | - Tayyaba Ijaz
- Mayo Hospital, Health Department, Lahore 54000, Pakistan
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22
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Shein AMS, Hongsing P, Smith OK, Phattharapornjaroen P, Miyanaga K, Cui L, Ishikawa H, Amarasiri M, Monk PN, Kicic A, Chatsuwan T, Pletzer D, Higgins PG, Abe S, Wannigama DL. Current and novel therapies for management of Acinetobacter baumannii-associated pneumonia. Crit Rev Microbiol 2024:1-22. [PMID: 38949254 DOI: 10.1080/1040841x.2024.2369948] [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: 09/25/2023] [Accepted: 06/11/2024] [Indexed: 07/02/2024]
Abstract
Acinetobacter baumannii is a common pathogen associated with hospital-acquired pneumonia showing increased resistance to carbapenem and colistin antibiotics nowadays. Infections with A. baumannii cause high patient fatalities due to their capability to evade current antimicrobial therapies, emphasizing the urgency of developing viable therapeutics to treat A. baumannii-associated pneumonia. In this review, we explore current and novel therapeutic options for overcoming therapeutic failure when dealing with A. baumannii-associated pneumonia. Among them, antibiotic combination therapy administering several drugs simultaneously or alternately, is one promising approach for optimizing therapeutic success. However, it has been associated with inconsistent and inconclusive therapeutic outcomes across different studies. Therefore, it is critical to undertake additional clinical trials to ascertain the clinical effectiveness of different antibiotic combinations. We also discuss the prospective roles of novel antimicrobial therapies including antimicrobial peptides, bacteriophage-based therapy, repurposed drugs, naturally-occurring compounds, nanoparticle-based therapy, anti-virulence strategies, immunotherapy, photodynamic and sonodynamic therapy, for utilizing them as additional alternative therapy while tackling A. baumannii-associated pneumonia. Importantly, these innovative therapies further require pharmacokinetic and pharmacodynamic evaluation for safety, stability, immunogenicity, toxicity, and tolerability before they can be clinically approved as an alternative rescue therapy for A. baumannii-associated pulmonary infections.
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Affiliation(s)
- Aye Mya Sithu Shein
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Center of Excellence in, Antimicrobial Resistance and Stewardship Research, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Parichart Hongsing
- Mae Fah Luang University Hospital, Chiang Rai, Thailand
- School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, Thailand
| | - O'Rorke Kevin Smith
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Phatthranit Phattharapornjaroen
- Department of Emergency Medicine, Center of Excellence, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
- Department of Surgery, Sahlgrenska Academy, Institute of Clinical Sciences, Gothenburg University, Gothenburg, Sweden
| | - Kazuhiko Miyanaga
- Division of Bacteriology, School of Medicine, Jichi Medical University, Tochigi, Japan
| | - Longzhu Cui
- Division of Bacteriology, School of Medicine, Jichi Medical University, Tochigi, Japan
| | - Hitoshi Ishikawa
- Yamagata Prefectural University of Health Sciences, Kamiyanagi, Japan
| | - Mohan Amarasiri
- Laboratory of Environmental Hygiene, Department of Health Science, School of Allied Health Sciences, Kitasato University, Kitasato, Sagamihara-Minami, Japan
| | - Peter N Monk
- Department of Infection, Immunity & Cardiovascular Disease, University of Sheffield Medical School, UK
| | - Anthony Kicic
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Nedlands, Western Australia, Australia
- Centre for Cell Therapy and Regenerative Medicine, Medical School, The University of Western Australia, Nedlands, Western Australia, Australia
- Department of Respiratory and Sleep Medicine, Perth Children's Hospital, Nedlands, Western Australia, Australia
- School of Population Health, Curtin University, Bentley, Western Australia, Australia
| | - Tanittha Chatsuwan
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Center of Excellence in, Antimicrobial Resistance and Stewardship Research, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Daniel Pletzer
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Paul G Higgins
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
- German Centre for Infection Research, Partner site Bonn-Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Shuichi Abe
- Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
| | - Dhammika Leshan Wannigama
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Center of Excellence in, Antimicrobial Resistance and Stewardship Research, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
- School of Medicine, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands, Western Australia, Australia
- Biofilms and Antimicrobial Resistance Consortium of ODA receiving countries, The University of Sheffield, Sheffield, UK
- Pathogen Hunter's Research Team, Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
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23
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Singh S, Singh S, Trivedi M, Dwivedi M. An insight into MDR Acinetobacter baumannii infection and its pathogenesis: Potential therapeutic targets and challenges. Microb Pathog 2024; 192:106674. [PMID: 38714263 DOI: 10.1016/j.micpath.2024.106674] [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: 10/19/2023] [Revised: 04/22/2024] [Accepted: 05/01/2024] [Indexed: 05/09/2024]
Abstract
Acinetobacter baumannii is observed as a common species of Gram-negative bacteria that exist in soil and water. Despite being accepted as a typical component of human skin flora, it has become an important opportunistic pathogen, especially in healthcare settings. The pathogenicity of A. baumannii is attributed to its virulence factors, which include adhesins, pili, lipopolysaccharides, outer membrane proteins, iron uptake systems, autotransporter, secretion systems, phospholipases etc. These elements provide the bacterium the ability to cling to and penetrate host cells, get past the host immune system, and destroy tissue. Its infection is a major contributor to human pathophysiological conditions including pneumonia, bloodstream infections, urinary tract infections, and surgical site infections. It is challenging to treat infections brought on by this pathogen since this bacterium has evolved to withstand numerous drugs and further emergence of drug-resistant A. baumannii results in higher rates of morbidity and mortality. The long-term survival of this bacterium on surfaces of medical supplies and hospital furniture facilitates its frequent spread in humans from one habitat to another. There is a need for urgent investigations to find effective drug targets for A. baumannii as well as designing novel drugs to reduce the survival and spread of infection. In the current review, we represent the specific features, pathogenesis, and molecular intricacies of crucial drug targets of A. baumannii. This would also assist in proposing strategies and alternative therapies for the prevention and treatment of A. baumannii infections and their spread.
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Affiliation(s)
- Sukriti Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India
| | - Sushmita Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India
| | - Mala Trivedi
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India
| | - Manish Dwivedi
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India; Research Cell, Amity University Uttar Pradesh, Lucknow, 226028, India.
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Marino A, Augello E, Stracquadanio S, Bellanca CM, Cosentino F, Spampinato S, Cantarella G, Bernardini R, Stefani S, Cacopardo B, Nunnari G. Unveiling the Secrets of Acinetobacter baumannii: Resistance, Current Treatments, and Future Innovations. Int J Mol Sci 2024; 25:6814. [PMID: 38999924 PMCID: PMC11241693 DOI: 10.3390/ijms25136814] [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: 06/01/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
Acinetobacter baumannii represents a significant concern in nosocomial settings, particularly in critically ill patients who are forced to remain in hospital for extended periods. The challenge of managing and preventing this organism is further compounded by its increasing ability to develop resistance due to its extraordinary genomic plasticity, particularly in response to adverse environmental conditions. Its recognition as a significant public health risk has provided a significant impetus for the identification of new therapeutic approaches and infection control strategies. Indeed, currently used antimicrobial agents are gradually losing their efficacy, neutralized by newer and newer mechanisms of bacterial resistance, especially to carbapenem antibiotics. A deep understanding of the underlying molecular mechanisms is urgently needed to shed light on the properties that allow A. baumannii enormous resilience against standard therapies. Among the most promising alternatives under investigation are the combination sulbactam/durlobactam, cefepime/zidebactam, imipenem/funobactam, xeruborbactam, and the newest molecules such as novel polymyxins or zosurabalpin. Furthermore, the potential of phage therapy, as well as deep learning and artificial intelligence, offer a complementary approach that could be particularly useful in cases where traditional strategies fail. The fight against A. baumannii is not confined to the microcosm of microbiological research or hospital wards; instead, it is a broader public health dilemma that demands a coordinated, global response.
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Affiliation(s)
- Andrea Marino
- Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, 95122 Catania, Italy
| | - Egle Augello
- Department of Biomedical and Biotechnological Science, Section of Pharmacology, University of Catania, 95123 Catania, Italy
- Clinical Toxicology Unit, University Hospital of Catania, 95123 Catania, Italy
| | - Stefano Stracquadanio
- Department of Biomedical and Biotechnological Sciences, Section of Microbiology, University of Catania, Via Santa Sofia 97, 95123 Catania, Italy
| | - Carlo Maria Bellanca
- Department of Biomedical and Biotechnological Science, Section of Pharmacology, University of Catania, 95123 Catania, Italy
- Clinical Toxicology Unit, University Hospital of Catania, 95123 Catania, Italy
| | - Federica Cosentino
- Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, 95122 Catania, Italy
| | - Serena Spampinato
- Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, 95122 Catania, Italy
| | - Giuseppina Cantarella
- Department of Biomedical and Biotechnological Science, Section of Pharmacology, University of Catania, 95123 Catania, Italy
| | - Renato Bernardini
- Department of Biomedical and Biotechnological Science, Section of Pharmacology, University of Catania, 95123 Catania, Italy
- Clinical Toxicology Unit, University Hospital of Catania, 95123 Catania, Italy
| | - Stefania Stefani
- Department of Biomedical and Biotechnological Sciences, Section of Microbiology, University of Catania, Via Santa Sofia 97, 95123 Catania, Italy
| | - Bruno Cacopardo
- Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, 95122 Catania, Italy
| | - Giuseppe Nunnari
- Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, 95122 Catania, Italy
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Qiu Z, Yuan K, Cao H, Chen S, Chen F, Mo F, Guo G, Peng J. Cross-talk of MLST and transcriptome unveiling antibiotic resistance mechanism of carbapenem resistance Acinetobacter baumannii clinical strains isolated in Guiyang, China. Front Microbiol 2024; 15:1394775. [PMID: 38946905 PMCID: PMC11211267 DOI: 10.3389/fmicb.2024.1394775] [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: 03/02/2024] [Accepted: 05/23/2024] [Indexed: 07/02/2024] Open
Abstract
Introduction Acinetobacter baumannii (A. baumannii) is an important opportunistic pathogen causing nosocomial infection in the clinic. The occurrence rate of antibiotic resistance is increasing year by year, resulting in a highly serious situation of bacterial resistance. Methods To better understand the local epidemiology of multidrug-resistant A. baumannii, an investigation was conducted on the antibiotic resistance of different types of A. baumannii and its relationship with the genes of A. baumannii. Furthermore, the molecular mechanism underlying antibiotic resistance in A. baumannii was investigated through transcriptome analysis. Results These results showed that a total of 9 STs were detected. It was found that 99% of the strains isolated in the hospital belonged to the same STs, and the clone complex CC208 was widely distributed in various departments and all kinds of samples. Furthermore, these A. baumannii strains showed high resistance to ertapenem, biapenem, meropenem, and imipenem, among which the resistance to ertapenem was the strongest. The detection rate of bla OXA-51 gene in these carbapenem resistance A. baumannii (CRAB) reached 100%; Additionally, the transcriptome results showed that the resistance genes were up-regulated in resistance strains, and these genes involved in biofilm formation, efflux pumps, peptidoglycan biosynthesis, and chaperonin synthesis. Discussion These results suggest that the CC208 STs were the main clonal complex, and showed high carbapenem antibiotic resistance. All these resistant strains were distributed in various departments, but most of them were distributed in intensive care units (ICU). The bla OXA-23 was the main antibiotic resistance genotype; In summary, the epidemic trend of clinical A. baumannii in Guiyang, China was analyzed from the molecular level, and the resistance mechanism of A. baumannii to carbapenem antibiotics was analyzed with transcriptome, which provided a theoretical basis for better control of A. baumannii.
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Affiliation(s)
- Zhilang Qiu
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- The Key and Characteristic Laboratory of Modern Pathogen Biology, Basic Medical College, Guizhou Medical University, Guiyang, China
| | - Kexin Yuan
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- The Key and Characteristic Laboratory of Modern Pathogen Biology, Basic Medical College, Guizhou Medical University, Guiyang, China
| | - Huijun Cao
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Sufang Chen
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- The Key and Characteristic Laboratory of Modern Pathogen Biology, Basic Medical College, Guizhou Medical University, Guiyang, China
| | - Feifei Chen
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Fei Mo
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Guo Guo
- The Key and Characteristic Laboratory of Modern Pathogen Biology, Basic Medical College, Guizhou Medical University, Guiyang, China
- Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
| | - Jian Peng
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- The Key and Characteristic Laboratory of Modern Pathogen Biology, Basic Medical College, Guizhou Medical University, Guiyang, China
- Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
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Khan I, Bu R, Ali Z, Iqbal MS, Shi H, Ding L, Hong M. Metagenomics Analysis Reveals the Composition and Functional Differences of Fecal Microbiota in Wild, Farm, and Released Chinese Three-Keeled Pond Turtles ( Mauremys reevesii). Animals (Basel) 2024; 14:1750. [PMID: 38929370 PMCID: PMC11201187 DOI: 10.3390/ani14121750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
The intestine of living organisms harbors different microbiota associated with the biological functioning and health of the host and influences the process of ecological adaptation. Here, we studied the intestinal microbiota's composition and functional differences using 16S rRNA and metagenomic analysis in the wild, farm, and released Chinese three-keeled pond turtle (Mauremys reevesii). At the phylum level, Bacteroidota dominated, followed by Firmicutes, Fusobacteriota, and Actinobacteriota in the wild group, but Chloroflexi was more abundant in the farm and released groups. Moreover, Chryseobacterium, Acinetobacter, Comamonas, Sphingobacterium, and Rhodobacter were abundant in the released and farm cohorts, respectively. Cetobacterium, Paraclostridium, Lysobacter, and Leucobacter showed an abundance in the wild group. The Kyoto Encyclopedia of Genes and Genomes (KEGG) database revealed that the relative abundance of most pathways was significantly higher in the wild turtles (carbohydrate metabolism, lipid metabolism, metabolism of cofactors, and vitamins). The comprehensive antibiotic resistance database (CARD) showed that the antibiotic resistance gene (ARG) subtype macB was the most abundant in the farm turtle group, while tetA was higher in the wild turtles, and srpYmcr was higher in the released group. Our findings shed light on the association between the intestinal microbiota of M. reevesii and its habitats and could be useful for tracking habitats to protect and conserve this endangered species.
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Affiliation(s)
- Ijaz Khan
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
| | - Rongping Bu
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf University, Qinzhou 535000, China
| | - Zeeshan Ali
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
| | - Muhammad Shahid Iqbal
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
| | - Haitao Shi
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
| | - Li Ding
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
| | - Meiling Hong
- Key Laboratory of Tropical Island Ecology, Ministry of Education, Hainan Key Laboratory of Tropical Animal and Plant Ecology, College of Life Sciences, Hainan Normal University, Haikou 571158, China; (I.K.); (R.B.)
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Xiu Y, Dai Y, Yin S, Wei Q. Analysis of the Class 1 Integrons, Carbapenemase Genes and Biofilm Formation Genes Occurrence in Acinetobacter baumannii Clinical Isolates. Pol J Microbiol 2024; 73:189-197. [PMID: 38808771 PMCID: PMC11192457 DOI: 10.33073/pjm-2024-017] [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: 12/09/2023] [Accepted: 03/28/2024] [Indexed: 05/30/2024] Open
Abstract
Acinetobacter baumannii is a non-fermentative Gram-negative bacterium that can cause nosocomial infections in critically ill patients. Carbapenem-resistant A. baumannii (CRAB) has spread rapidly in clinical settings and has become a key concern. The main objective of this study was to identify the distribution of integrons and biofilm-formation-related virulence genes in CRAB isolates. A total of 269 A. baumannii isolates (219 isolates of CRAB and 50 isolates of carbapenem-sensitive A. baumannii (CSAB)) were collected. Carbapenemase genes (bla KPC, bla VIM, bla IMP, bla NDM, and bla OXA-23-like) and biofilm-formation-related virulence genes (abal, bfms, bap, and cusE) were screened with PCR. Class 1 integron was screened with PCR, and common promoters and gene cassette arrays were determined with restriction pattern analysis combined with primer walking sequencing. Whole-genome sequencing was conducted, and data were analyzed for a bla OXA-23-like-negative isolate. All 219 CRAB isolates were negative for bla KPC, bla VIM, bla IMP, and bla NDM, while bla OXA-23-like was detected in 218 isolates. The detection rates for abal, bfms, bap, and cusE in 219 CRAB were 93.15%, 63.93%, 88.13%, and 77.63%, respectively. Class 1 integron was detected in 75 CRAB (34.25%) and in 3 CSAB. The single gene cassette array aacA4-catB8-aadA1 with relatively strong PcH2 promoter was detected in class 1 integrons. The bla OXA-23-like-negative CRAB isolate was revealed to be a new sequence type (Oxford 3272, Pasteur 2520) carrying bla OXA-72, bla OXA-259, and bla ADC-26. In conclusion, bla OXA-23-like was the main reason for CRAB's resistance to carbapenems. A new (Oxford 3272, Pasteur 2520) CRAB sequence type carrying the bla OXA-72, bla OXA-259, and bla ADC-26 was reported.
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Affiliation(s)
- Yu Xiu
- Department of Laboratory Medicine, Anhui University of Science and Technology Affiliated Fengxian Hospital, Shanghai, China
| | - Yueru Dai
- Department of Laboratory Medicine, Anhui University of Science and Technology Affiliated Fengxian Hospital, Shanghai, China
| | - Shasha Yin
- Department of Laboratory Medicine, Anhui University of Science and Technology Affiliated Fengxian Hospital, Shanghai, China
| | - Quhao Wei
- Department of Laboratory Medicine, Anhui University of Science and Technology Affiliated Fengxian Hospital, Shanghai, China
- Department of Laboratory Medicine, Southern Medical University Affiliated Fengxian Hospital, Shanghai, China
- Department of Laboratory Medicine, Shanghai University of Medicine and Health Sciences Affiliated Sixth People’s Hospital South Campus, Shanghai, China
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28
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Wang S, Zhao K, Chen Z, Liu D, Tang S, Sun C, Chen H, Wang Y, Wu C. Halicin: A New Horizon in Antibacterial Therapy against Veterinary Pathogens. Antibiotics (Basel) 2024; 13:492. [PMID: 38927159 PMCID: PMC11200678 DOI: 10.3390/antibiotics13060492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
It is crucial to discover novel antimicrobial drugs to combat resistance. This study investigated the antibacterial properties of halicin (SU3327), an AI-identified anti-diabetic drug, against 13 kinds of common clinical pathogens of animal origin, including multidrug-resistant strains. Employing minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) assessments, halicin demonstrated a broad-spectrum antibacterial effect. Time-killing assays revealed its concentration-dependent bactericidal activity against Escherichia coli ATCC 25922 (E. coli ATCC 25922), Staphylococcus aureus ATCC 29213 (S. aureus ATCC 29213), and Actinobacillus pleuropneumoniae S6 (APP S6) after 4 h of treatment at concentrations above the MIC. Halicin exhibited longer post-antibiotic effects (PAEs) and sub-MIC effects (PA-SMEs) for E. coli 25922, S. aureus 29213, and APP S6 compared to ceftiofur and ciprofloxacin, the commonly used veterinary antimicrobial agents, indicating sustained antibacterial action. Additionally, the results of consecutive passaging experiments over 40 d at sub-inhibitory concentrations showed that bacteria exhibited difficulty in developing resistance to halicin. Toxicology studies confirmed that halicin exhibited low acute toxicity, being non-mutagenic, non-reproductive-toxic, and non-genotoxic. Blood biochemical results suggested that halicin has no significant impact on hematological parameters, liver function, and kidney function. Furthermore, halicin effectively treated respiratory A. pleuropneumoniae infections in murine models. These results underscore the potential of halicin as a new antibacterial agent with applications against clinically relevant pathogens in veterinary medicine.
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Affiliation(s)
- Shuge Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Ke Zhao
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Ziqi Chen
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Dejun Liu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Shusheng Tang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Chengtao Sun
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Hongliang Chen
- School of Life Sciences, Xiamen University, Xiamen 361005, China;
- Xiamen Vangenes Biotechnology Co., Ltd., Xiamen 361006, China
| | - Yang Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Congming Wu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
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Petrucci F, Perciballi B, Rivano Capparuccia M, Iaiani G, Lo Torto F, Ribuffo D, Gumina S, De Meo D. Compassionate use of cefiderocol in a complex case of extensively drug-resistant Acinetobacter baumannii fracture-related infection: a comprehensive approach and multidisciplinary management. Infection 2024:10.1007/s15010-024-02294-x. [PMID: 38748180 DOI: 10.1007/s15010-024-02294-x] [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: 03/16/2024] [Accepted: 05/07/2024] [Indexed: 06/06/2024]
Abstract
PURPOSE Fracture-related infections (FRI) pose a difficult management problem, as they require numerous surgical interventions and extended antibiotic treatments, especially when a multidrug-resistant organism is involved, with a paucity of available literature that provides guidance. RESULTS A 42 year-old male presents an open diaphyseal tibia and fibula fracture, complicated by soft tissue necrosis and infections caused by extensively drug-resistant Acinetobacter baumannii (XDR-Ab). Initially treated with a damage control external fixator, the patient underwent multiple surgical procedures, including radical debridement, negative pressure wound therapy, external fixator revisions and reconstructive surgery using a latissimus dorsi free flap. The emergence of colistin resistance in the Acinetobacter baumannii strain led to the compassionate use of cefiderocol, finally achieving clinical cure. CONCLUSIONS This case report is one of the firsts that highlights the potential efficacy of cefiderocol in treating challenging bone and joint infections sustained by XDR-Ab. The successful outcome also emphasizes the importance of a comprehensive, multidisciplinary approach in achieving favorable results in complex FRI.
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Affiliation(s)
- Flavia Petrucci
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185, Rome, Italy.
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy.
| | - Beatrice Perciballi
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy
- Department of Anatomical, Forensic Medicine and Musculoskeletal System Sciences, Sapienza University of Rome, 00161, Rome, Italy
| | - Marco Rivano Capparuccia
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy
- Department of Internal Medicine, Endocrine-Metabolic Sciences and Infectious Diseases, Policlinico Umberto I University Hospital, 00161, Rome, Italy
| | - Giancarlo Iaiani
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy
- Department of Internal Medicine, Endocrine-Metabolic Sciences and Infectious Diseases, Policlinico Umberto I University Hospital, 00161, Rome, Italy
| | - Federico Lo Torto
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy
- Plastic Surgery Unit, Department of General Surgery, Plastic Surgery, Orthopedics Policlinico Umberto I Hospital-Sapienza, University of Rome, Viale del Policlinico 155, 00161, Rome, Italy
| | - Diego Ribuffo
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy
- Plastic Surgery Unit, Department of General Surgery, Plastic Surgery, Orthopedics Policlinico Umberto I Hospital-Sapienza, University of Rome, Viale del Policlinico 155, 00161, Rome, Italy
| | - Stefano Gumina
- Department of Anatomical, Forensic Medicine and Musculoskeletal System Sciences, Sapienza University of Rome, 00161, Rome, Italy
| | - Daniele De Meo
- M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161, Rome, Italy
- Department of Anatomical, Forensic Medicine and Musculoskeletal System Sciences, Sapienza University of Rome, 00161, Rome, Italy
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30
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Bouhrour N, Nibbering PH, Bendali F. Medical Device-Associated Biofilm Infections and Multidrug-Resistant Pathogens. Pathogens 2024; 13:393. [PMID: 38787246 PMCID: PMC11124157 DOI: 10.3390/pathogens13050393] [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: 03/27/2024] [Revised: 04/29/2024] [Accepted: 05/04/2024] [Indexed: 05/25/2024] Open
Abstract
Medical devices such as venous catheters (VCs) and urinary catheters (UCs) are widely used in the hospital setting. However, the implantation of these devices is often accompanied by complications. About 60 to 70% of nosocomial infections (NIs) are linked to biofilms. The main complication is the ability of microorganisms to adhere to surfaces and form biofilms which protect them and help them to persist in the host. Indeed, by crossing the skin barrier, the insertion of VC inevitably allows skin flora or accidental environmental contaminants to access the underlying tissues and cause fatal complications like bloodstream infections (BSIs). In fact, 80,000 central venous catheters-BSIs (CVC-BSIs)-mainly occur in intensive care units (ICUs) with a death rate of 12 to 25%. Similarly, catheter-associated urinary tract infections (CA-UTIs) are the most commonlyhospital-acquired infections (HAIs) worldwide.These infections represent up to 40% of NIs.In this review, we present a summary of biofilm formation steps. We provide an overview of two main and important infections in clinical settings linked to medical devices, namely the catheter-asociated bloodstream infections (CA-BSIs) and catheter-associated urinary tract infections (CA-UTIs), and highlight also the most multidrug resistant bacteria implicated in these infections. Furthermore, we draw attention toseveral useful prevention strategies, and advanced antimicrobial and antifouling approaches developed to reduce bacterial colonization on catheter surfaces and the incidence of the catheter-related infections.
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Affiliation(s)
- Nesrine Bouhrour
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia 06000, Algeria;
| | - Peter H. Nibbering
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands;
| | - Farida Bendali
- Laboratoire de Microbiologie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia 06000, Algeria;
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Wei Y, Wu H, Zhang X, Liang Y, Shi D, Wang L, Li H, Yu H, Yang D, Zhou S, Chen T, Yang Z, Li J, Jin M. Comparative analysis of chlorine-resistant bacteria after chlorination and chloramination in drinking water treatment plants. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:134075. [PMID: 38508114 DOI: 10.1016/j.jhazmat.2024.134075] [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: 08/13/2023] [Revised: 02/04/2024] [Accepted: 03/17/2024] [Indexed: 03/22/2024]
Abstract
Chlorine-resistant bacteria (CRB) in drinking water treatment plants (DWTPs) jeopardize water quality and pose a potential risk to human health. However, the specific response of CRB to chlorination and chloramination remains uncharacterized. Therefore, we analyzed 16 S rRNA sequencing data from water samples before and after chlorination and chloramination taken between January and December 2020. Proteobacteria and Firmicutes dominated all finished water samples. After chloramination, Acinetobacter, Pseudomonas, Methylobacterium, Ralstonia, and Sphingomonas were the dominant CRB, whereas Ralstonia, Bacillus, Acinetobacter, Pseudomonas, and Enterococcus were prevalent after chlorination. Over 75% of the CRB e.g. Acinetobacter, Pseudomonas, Bacillus, and Enterococcus were shared between the chlorination and chloramination, involving potentially pathogens, such as Acinetobacter baumannii and Pseudomonas aeruginosa. Notably, certain genera such as Faecalibacterium, Geobacter, and Megasphaera were enriched as strong CRB after chloramination, whereas Vogesella, Flavobacterium, Thalassolituus, Pseudoalteromonas, and others were enriched after chlorination according to LEfSe analysis. The shared CRB correlated with temperature, pH, and turbidity, displaying a seasonal pattern with varying sensitivity to chlorination and chloramination in cold and warm seasons. These findings enhance our knowledge of the drinking water microbiome and microbial health risks, thus enabling better infectious disease control through enhanced disinfection strategies in DWTPs.
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Affiliation(s)
- Yijun Wei
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Haiyan Wu
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Xudong Zhang
- Water Quality Monitoring Center of Tianjin Water Group Co. Ltd, Tianjin 300240, China
| | - Yongbing Liang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Danyang Shi
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Lin Wang
- Water Quality Monitoring Center of Tianjin Water Group Co. Ltd, Tianjin 300240, China
| | - Haibei Li
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Hongling Yu
- Water Quality Monitoring Center of Tianjin Water Group Co. Ltd, Tianjin 300240, China
| | - Dong Yang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Shuqing Zhou
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Tianjiao Chen
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Zhongwei Yang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Junwen Li
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China
| | - Min Jin
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin 300050, China.
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Rodriguez Jimenez A, Breine A, Whiteway C, Dechamps E, George IF, Van der Henst C. Bactericidal effect of bacteria isolated from the marine sponges Hymeniacidon perlevis and Halichondria panicea against carbapenem-resistant Acinetobacter baumannii. Lett Appl Microbiol 2024; 77:ovae035. [PMID: 38684470 DOI: 10.1093/lambio/ovae035] [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: 01/23/2024] [Revised: 03/19/2024] [Accepted: 04/28/2024] [Indexed: 05/02/2024]
Abstract
In this study, we evaluated the antimicrobial activity of bacteria isolated from the marine sponges Hymeniacidon perlevis and Halichondria panicea against seven Acinetobacter baumannii strains, the majority of which were clinically relevant carbapenem-resistant A. baumannii strains. We observed the inhibitory activity of 18 (out of 114) sponge-isolated bacterial strains against all A. baumanii strains using medium-throughput solid agar overlay assays. These inhibitory strains belonged to the genera Lactococcus, Pseudomonas, and Vagococcus. In addition, this antimicrobial activity was validated through a liquid co-cultivation challenge using an inhibitory strain of each genus and a green fluorescent protein-tagged A. baumanii strain. Fluorescence measurements indicated that the growth of A. baumanii was inhibited by the sponge isolates. In addition, the inability of A. baumanii to grow after spreading the co-cultures on solid medium allowed us to characterize the activity of the sponge isolates as bactericidal. In conclusion, this study demonstrates that marine sponges are a reservoir of bacteria that deserves to be tapped for antibiotic discovery against A. baumanii.
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Affiliation(s)
- Ana Rodriguez Jimenez
- Ecology of Aquatic Systems, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
- Evolutionary Biology and Ecology, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Anke Breine
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
| | - Clemence Whiteway
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
| | - Etienne Dechamps
- Ecology of Aquatic Systems, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Isabelle F George
- Ecology of Aquatic Systems, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
- Marine Biology, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Charles Van der Henst
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
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Yan Y, Xu J, Huang W, Fan Y, Li Z, Tian M, Ma J, Lu X, Liang J. Metagenomic and Culturomics Analysis of Microbial Communities within Surface Sediments and the Prevalence of Antibiotic Resistance Genes in a Pristine River: The Zaqu River in the Lancang River Source Region, China. Microorganisms 2024; 12:911. [PMID: 38792738 PMCID: PMC11124135 DOI: 10.3390/microorganisms12050911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 04/26/2024] [Accepted: 04/28/2024] [Indexed: 05/26/2024] Open
Abstract
Microbial communities inhabiting sedimentary environments in river source regions serve as pivotal indicators of pristine river ecosystems. While the correlation between antibiotic resistome and pathogenicity with core gut bacteria in humans is well established, there exists a significant knowledge gap concerning the interaction of antibiotic resistance genes (ARGs) and human pathogenic bacteria (HPB) with specific microbes in river source basins, often referred to as "terrestrial gut". Understanding the microbial composition, including bacteria and resident genetic elements such as ARGs, HPB, Mobile Genetic Elements (MGEs), and Virulence Factors (VFs), within natural habitats against the backdrop of global change, is imperative. To address this gap, an enrichment-based culturomics complementary along with metagenomics was conducted in this study to characterize the microbial biobank and provide preliminary ecological insights into profiling the dissemination of ARGs in the Lancang River Source Basin. Based on our findings, in the main stream of the Lancang River Source Basin, 674 strains of bacteria, comprising 540 strains under anaerobic conditions and 124 under aerobic conditions, were successfully isolated. Among these, 98 species were identified as known species, while 4 were potential novel species. Of these 98 species, 30 were HPB relevant to human health. Additionally, bacA and bacitracin emerged as the most abundant ARGs and antibiotics in this river, respectively. Furthermore, the risk assessment of ARGs predominantly indicated the lowest risk rank (Rank Ⅳ) in terms of endangering human health. In summary, enrichment-based culturomics proved effective in isolating rare and unknown bacteria, particularly under anaerobic conditions. The emergence of ARGs showed limited correlation with MGEs, indicating minimal threats to human health within the main stream of the Lancang River Source Basin.
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Affiliation(s)
- Yi Yan
- School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; (Y.Y.); (J.X.); (W.H.); (M.T.); (J.M.)
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Jialiang Xu
- School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; (Y.Y.); (J.X.); (W.H.); (M.T.); (J.M.)
| | - Wenmin Huang
- School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; (Y.Y.); (J.X.); (W.H.); (M.T.); (J.M.)
| | - Yufeng Fan
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Y.F.); (Z.L.)
| | - Zhenpeng Li
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Y.F.); (Z.L.)
| | - Mingkai Tian
- School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; (Y.Y.); (J.X.); (W.H.); (M.T.); (J.M.)
| | - Jinsheng Ma
- School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; (Y.Y.); (J.X.); (W.H.); (M.T.); (J.M.)
| | - Xin Lu
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Y.F.); (Z.L.)
| | - Jian Liang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
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Peng X, Li Z, Pei Y, Zheng S, Liu J, Wang J, Li R, Xu X. Streptococcus salivarius K12 Alleviates Oral Mucositis in Patients Undergoing Radiotherapy for Malignant Head and Neck Tumors: A Randomized Controlled Trial. J Clin Oncol 2024; 42:1426-1435. [PMID: 38215354 PMCID: PMC11095859 DOI: 10.1200/jco.23.00837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 09/10/2023] [Accepted: 11/06/2023] [Indexed: 01/14/2024] Open
Abstract
PURPOSE Oral mucositis (OM) is a common debilitating toxicity associated with radiotherapy (RT) for malignant head and neck tumors. This prospective, randomized, double-blind, placebo-controlled trial aimed to evaluate the efficacy and safety of Streptococcus salivarius K12 (SsK12) in reducing the incidence, duration, and severity of severe OM (SOM). METHODS A total of 160 patients with malignant head and neck tumors undergoing definitive or postoperative adjuvant RT were randomly assigned (1:1) to receive SsK12 probiotic (n = 80) or placebo (n = 80) at West China Hospital, Sichuan University, Chengdu, China. Patients were instructed to suck SsK12 or placebo lozenges thrice daily from the initiation to the end of RT. OM was evaluated twice a week during RT and once a week thereafter for up to 8 weeks. The primary end point was the incidence of SOM. Adverse events were assessed according to the National Cancer Institute Common Terminology Criteria for Adverse Events, version 5.0. RESULTS Baseline patient characteristics were similar in the SsK12 and placebo groups. The incidence of SOM was significantly lower in the SsK12 group as compared with the placebo group (36.6% v 54.2%; P = .0351). The duration (median, 0.0 days v 7.0 days; mean, 8.9 days v 18.3 days; P = .0084) and time to develop SOM (median, not estimable v 42.0 days; hazard ratio, 0.55 [95% CI, 0.34 to 0.89]; log-rank test: P = .0123) were also improved in the case of the SsK12 group. Adverse events were similar between the groups, and mild or moderate gastrointestinal reactions (flatulence or dyspepsia) associated with the lozenges were observed in two patients in the SsK12 group. High-throughput sequencing results indicated that SsK12 inhibited opportunistic pathogens and enriched oral commensals during RT. CONCLUSION In this prospective, randomized clinical trial, SsK12 probiotic significantly reduced the incidence, onset, and duration of SOM with a good safety profile.
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Affiliation(s)
- Xingchen Peng
- Department of Biotherapy, Cancer Center, West China Hospital & State Key Laboratory of Biotherapy, Sichuan University, Chengdu, China
| | - Zixia Li
- Department of Cariology and Endodontics, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yiyan Pei
- Department of Biotherapy, Cancer Center, West China Hospital & State Key Laboratory of Biotherapy, Sichuan University, Chengdu, China
| | - Shuhao Zheng
- Department of Cariology and Endodontics, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jinchi Liu
- Department of Cariology and Endodontics, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jingjing Wang
- Department of Biotherapy, Cancer Center, West China Hospital & State Key Laboratory of Biotherapy, Sichuan University, Chengdu, China
| | - Ruidan Li
- Department of Biotherapy, Cancer Center, West China Hospital & State Key Laboratory of Biotherapy, Sichuan University, Chengdu, China
| | - Xin Xu
- Department of Cariology and Endodontics, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Sabry MM, El-Halawany AM, Fahmy WG, Eltanany BM, Pont L, Benavente F, Attia AS, Sherbiny FF, Ibrahim RM. Evidence on the inhibitory effect of Brassica plants against Acinetobacter baumannii lipases: phytochemical analysis, in vitro, and molecular docking studies. BMC Complement Med Ther 2024; 24:164. [PMID: 38641582 PMCID: PMC11027383 DOI: 10.1186/s12906-024-04460-y] [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: 01/02/2024] [Accepted: 03/28/2024] [Indexed: 04/21/2024] Open
Abstract
BACKGROUND Infections caused by Acinetobacter baumannii are becoming a rising public health problem due to its high degree of acquired and intrinsic resistance mechanisms. Bacterial lipases penetrate and damage host tissues, resulting in multiple infections. Because there are very few effective inhibitors of bacterial lipases, new alternatives for treating A. baumannii infections are urgently needed. In recent years, Brassica vegetables have received a lot of attention since their phytochemical compounds have been directly linked to diverse antimicrobial actions by inhibiting the growth of various Gram-positive and Gram-negative bacteria, yeast, and fungi. Despite their longstanding antibacterial history, there is currently a lack of scientific evidence to support their role in the management of infections caused by the nosocomial bacterium, A. baumannii. This study aimed to address this gap in knowledge by examining the antibacterial and lipase inhibitory effects of six commonly consumed Brassica greens, Chinese cabbage (CC), curly and Tuscan kale (CK and TK), red and green Pak choi (RP and GP), and Brussels sprouts (BR), against A. baumannii in relation to their chemical profiles. METHODS The secondary metabolites of the six extracts were identified using LC-QTOF-MS/MS analysis, and they were subsequently correlated with the lipase inhibitory activity using multivariate data analysis and molecular docking. RESULTS In total, 99 metabolites from various chemical classes were identified in the extracts. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) revealed the chemical similarities and variabilities among the specimens, with glucosinolates and phenolic compounds being the major metabolites. RP and GP showed the highest antibacterial activity against A. baumannii, followed by CK. Additionally, four species showed a significant effect on the bacterial growth curves and demonstrated relevant inhibition of A. baumannii lipolytic activity. CK showed the greatest inhibition (26%), followed by RP (21%), GP (21%), and TK (15%). Orthogonal partial least squares-discriminant analysis (OPLS-DA) pinpointed 9 metabolites positively correlated with the observed bioactivities. Further, the biomarkers displayed good binding affinities towards lipase active sites ranging from -70.61 to -30.91 kcal/mol, compared to orlistat. CONCLUSION This study emphasizes the significance of Brassica vegetables as a novel natural source of potential inhibitors of lipase from A. baumannii.
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Affiliation(s)
- Manal M Sabry
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
| | - Ali M El-Halawany
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
| | - Walaa G Fahmy
- Department of Microbiology & Immunology, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
| | - Basma M Eltanany
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
| | - Laura Pont
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA·UB), University of Barcelona, Barcelona, 08028, Spain
- Serra Húnter Program, Generalitat de Catalunya, Barcelona, 08007, Spain
| | - Fernando Benavente
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA·UB), University of Barcelona, Barcelona, 08028, Spain
| | - Ahmed S Attia
- Department of Microbiology & Immunology, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
- School of Pharmacy, Newgiza University, Giza, 12577, Egypt
| | - Farag F Sherbiny
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr city, Cairo, 11884, Egypt
| | - Rana M Ibrahim
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt.
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Papadopoulou M, Deliolanis I, Polemis M, Vatopoulos A, Psichogiou M, Giakkoupi P. Characteristics of the Genetic Spread of Carbapenem-Resistant Acinetobacter baumannii in a Tertiary Greek Hospital. Genes (Basel) 2024; 15:458. [PMID: 38674392 PMCID: PMC11050095 DOI: 10.3390/genes15040458] [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: 03/11/2024] [Revised: 03/30/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
Acinetobacter baumannii (Ab) has increasingly been identified as a cause of hospital-acquired infections and epidemics. The rise of carbapenem-resistant Acinetobacter baumannii (CRAB) poses significant challenges in treatment. Nosocomial outbreaks linked to CRAΒ A. baumannii strains have been reported worldwide, including in Greece. This study aimed to analyze the molecular epidemiology trends of multidrug-resistant A. baumannii isolates in a tertiary hospital in Athens, Greece. A total of 43 clinical isolates of extensively drug-resistant (XDRAB), pan-drug-resistant (PDRAB), and CRAB were collected from patients suffering from blood infection, hospitalized between 2016 and 2020 at the internal medicine clinics and the ICU. A.baumannii isolates underwent testing for Ambler class B and D carbapenemases and the detection of ISAba1, and were typed, initially, using pulsed-field gel electrophoresis, and, subsequently, using sequence-based typing and multiplex PCR to determine European Clone lineages. The blaOXA-23 gene accompanied by ISAba1 was prevalent in nearly all A. baumannii isolates, except for one carrying blaOXA-58. The intrinsic blaOXA-51-like gene was found in all isolates. No Ambler class B carbapenemases (VIM, NDM) were detected. Isolates were grouped into four PF-clusters and no one-cluster spread was documented, consistent with the absence of outbreak. The study indicated that XDR/PDR-CRAB isolates predominantly produce OXA-23 carbapenemase and belong to European Clone II. Further research is needed to understand the distribution of resistant bacteria and develop effective prevention and control strategies.
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Affiliation(s)
- Martha Papadopoulou
- Laboratory for the Surveillance of Infectious Diseases-LSID, Department of Public Health Policy, University of West Attica, 11521 Athens, Greece; (A.V.); (P.G.)
| | - Ioannis Deliolanis
- Department of Microbiology, Laiko General Hospital, 11527 Athens, Greece;
| | - Michalis Polemis
- Hellenic National Public Health Organization, 15123 Athens, Greece;
| | - Alkiviadis Vatopoulos
- Laboratory for the Surveillance of Infectious Diseases-LSID, Department of Public Health Policy, University of West Attica, 11521 Athens, Greece; (A.V.); (P.G.)
| | - Mina Psichogiou
- 1st Department of Internal Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Panagiota Giakkoupi
- Laboratory for the Surveillance of Infectious Diseases-LSID, Department of Public Health Policy, University of West Attica, 11521 Athens, Greece; (A.V.); (P.G.)
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Roy S, Morita D, Bhattacharya S, Dutta S, Basu S. Novel sequence type of carbapenem-resistant Acinetobacter pittii ST1451 with enhanced virulence isolated from septicaemic neonates in India. J Antimicrob Chemother 2024; 79:779-783. [PMID: 38334368 DOI: 10.1093/jac/dkae024] [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: 09/04/2023] [Accepted: 01/04/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND The clinical relevance of Acinetobacter pittii is increasing, but reports of this organism causing neonatal sepsis are rare. OBJECTIVES To understand the mechanisms of resistance and virulence of A. pittii isolated from neonatal blood belonging to a novel sequence type. MATERIALS AND METHODS Antibiotic susceptibility, MLST, WGS, phylogenomic comparison with a global collection of carbapenemase-harbouring A. pittii were done. To study the pathogenic potential of novel A. pittii, in vitro and in vivo assays were carried out. RESULTS AND DISCUSSION Two novel multidrug-resistant A. pittii from neonatal blood belonging to a novel sequence type 1451 (ST1451) were isolated. WGS revealed that the isolates were almost similar (147 SNP distant) and harbouring two carbapenem resistance genes blaNDM-1 with upstream ISAba125 and downstream bleMBL along with blaOXA-58 with upstream ISAba3. Other resistance genes included blaADC-25, blaOXA-533, aph(3″)-Ib, aph(3')-VIa, aph(6)-Id, aac(3)-IId, mph(E), msr(E), sul2 and tet(39), different efflux pump genes and amino acid substitutions within GyrA (Ser81Leu) and ParC (Ser84Leu; Glu88Ala) were detected among the isolates. The study genomes were closely related to four strains belonging to ST119. The isolates showed biofilm production, serum resistance, growth under iron limiting condition, surface-associated motility and adherence to host cell. Isolates induced cytokine production in the host cell and showed mice mortality. DISCUSSION AND CONCLUSIONS This study is the first report of the presence of blaNDM-1 in A. pittii from India along with another carbapenemase blaOXA-58. Emergence of highly virulent, multidrug-resistant A. pittii with attributes similar to A. baumannii calls for surveillance to identify the novel strains and their pathogenic and resistance potential.
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Affiliation(s)
- Subhasree Roy
- Division of Bacteriology, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Daichi Morita
- Department of Microbiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Sushmita Bhattacharya
- Division of Biochemistry, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Shanta Dutta
- Division of Bacteriology, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Sulagna Basu
- Division of Bacteriology, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, India
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Banerjee R, Robinson SM, Lahiri A, Verma P, Banerjee AK, Basak S, Basak K, Paul S. Exploring the resistome and virulome in major sequence types of Acinetobacter baumannii genomes: Correlations with genome divergence and sequence types. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2024; 119:105579. [PMID: 38417638 DOI: 10.1016/j.meegid.2024.105579] [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: 01/19/2024] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/01/2024]
Abstract
The increasing global prevalence of antimicrobial resistance in Acinetobacter baumannii has led to concerns regarding the effectiveness of infection treatment. Moreover, the critical role of virulence factor genes in A. baumannii's pathogenesis and its propensity to cause severe disease is of particular importance. Comparative genomics, including multi-locus sequence typing (MLST), enhances our understanding of A. baumannii epidemiology. While there is substantial documentation on A. baumannii, a comprehensive study of the antibiotic-resistant mechanisms and the virulence factors contributing to pathogenesis, and their correlation with Sequence Types (STs) remains incompletely elucidated. In this study, we aim to explore the relationship between antimicrobial resistance genes, virulence factor genes, and STs using genomic data from 223 publicly available A. baumannii strains. The core phylogeny analysis revealed five predominant STs in A. baumannii genomes, linked to their geographical sources of isolation. Furthermore, the resistome and virulome of A. baumannii followed an evolutionary pattern consistent with their pan-genome evolution. Among the major STs, we observed significant variations in resistant genes against "aminoglycoside" and "sulphonamide" antibiotics, highlighting the role of genotypic variations in determining resistance profiles. Furthermore, the presence of virulence factor genes, particularly exotoxin and nutritional / metabolic factor genes, played a crucial role in distinguishing the major STs, suggesting a potential link between genetic makeup and pathogenicity. Understanding these associations can provide valuable insights into A. baumannii's virulence potential and clinical outcomes, enabling the development of effective strategies to combat infections caused by this opportunistic pathogen.
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Affiliation(s)
- Rachana Banerjee
- Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, WB, India.
| | - Stephy Mol Robinson
- Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, WB, India
| | - Abhishake Lahiri
- Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, WB, India
| | - Prateek Verma
- Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, WB, India
| | - Ayushman Kumar Banerjee
- Department of Bioinformatics, Maulana Abul Kalam Azad University of Technology, West Bengal 741249, India
| | - Sohom Basak
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur 721302, India
| | - Kausik Basak
- Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, WB, India
| | - Sandip Paul
- Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, WB, India
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Jackson MNW, Wei W, Mang NS, Prokesch BC, Ortwine JK. Combination eravacycline therapy for ventilator-associated pneumonia due to carbapenem-resistant Acinetobacter baumannii in patients with COVID-19: A case series. Pharmacotherapy 2024; 44:301-307. [PMID: 38270447 DOI: 10.1002/phar.2908] [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: 09/04/2023] [Revised: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 01/26/2024]
Abstract
BACKGROUND Carbapenem-resistant Acinetobacter baumannii (CRAB) pneumonia is associated with poor clinical outcomes and increased mortality. Clinical data regarding the optimal treatment of CRAB is limited, and combination therapy is often preferred. Eravacycline has demonstrated in-vitro activity against A. baumannii and has been considered for the treatment of pulmonary infections caused by CRAB. OBJECTIVE The objective of this case series was to describe clinical outcomes associated with eravacycline when utilized as part of a combination regimen for the treatment of CRAB pneumonia at a county hospital. METHODS A retrospective chart review was conducted from April 1, 2020, to October 1, 2020, which included hospitalized patients ≥18 years of age, diagnosed with coronavirus disease 2019 (COVID-19), with a sputum culture positive for CRAB, and receipt of at least one dose of eravacycline. The primary outcome studied was clinical resolution of CRAB pneumonia. A key secondary outcome was microbiological resolution. RESULTS A total of 24 patients received combination eravacycline therapy for a median of 10.5 days. Overall, 17 (71%) patients demonstrated clinical resolution of CRAB pneumonia. Repeat sputum cultures post-treatment were collected in 17 (71%) patients, of which 12 (71%) achieved microbiological resolution. No adverse events attributable to eravacycline were identified. CONCLUSION With limited viable salvage treatment options, combination eravacycline therapy showed favorable microbiological and clinical outcomes in patients with CRAB pneumonia. In light of this, eravacycline could be considered as a potential treatment option when designing CRAB pneumonia salvage therapy regimens.
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Affiliation(s)
| | - Wenjing Wei
- Pharmacy Department, Parkland Health, Dallas, Texas, USA
| | - Norman S Mang
- Pharmacy Department, Parkland Health, Dallas, Texas, USA
| | - Bonnie C Prokesch
- Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA
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Wang Y, Ma Y, Xiong L, Wang X, Zhou Y, Chi X, Chen T, Fu H, Luo Q, Xiao Y. Comparison of in vitro synergy between polymyxin B or colistin in combination with 16 antimicrobial agents against multidrug-resistant Acinetobacter baumannii isolates. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2024; 57:300-308. [PMID: 38350840 DOI: 10.1016/j.jmii.2024.01.009] [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: 04/26/2023] [Revised: 01/04/2024] [Accepted: 01/25/2024] [Indexed: 02/15/2024]
Abstract
PURPOSES This study determined the synergy of polymyxin B (POLB) and colistin (COL) with 16 other tested antimicrobial agents in the inhibition of multidrug-resistant Acinetobacter baumannii (MDR-AB). METHODS We used chequerboard assays to determine synergy between the drugs against 50 clinical MDR-AB from a tertiary hospital in the Zhejiang province in 2019, classifying combinations as either antagonistic, independent, additive, or synergistic. The efficacy of hit combinations which showed highest synergistic rate were confirmed using time-kill assays. RESULTS Both POLB and COL displayed similar bactericidal effects when used in combination with these 16 tested drugs. Antagonism was only observed for a few strains (2%) exposed to a combination of POLB and cefoperazone/sulbactam (CSL). A higher percentage of synergistic combinations with POLB and COL were observed with rifabutin (RFB; 90%/96%), rifampicin (RIF; 60%/78%) and rifapentine (RFP; 56%/76%). Time-kill assays also confirmed the synergistic effect of POLB and rifamycin class combinations. 1/2 MIC rifamycin exposure can achieve bacterial clearance when combined with 1/2 MIC POLB or COL. CONCLUSION Nearly no antagonism was observed when combining polymyxins with other drugs by both chequerboard and time-kill assays, suggesting that polymyxins may be effective in combination therapy. The combinations of POLB/COL with RFB, RIF, and RFP displayed neat synergy, with RFB showing the greatest effect.
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Affiliation(s)
- Yuan Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yingying Ma
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Luying Xiong
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xueting Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yanzi Zhou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xiaohui Chi
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Tao Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Hao Fu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Qixia Luo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China.
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Ahuatzin-Flores OE, Torres E, Chávez-Bravo E. Acinetobacter baumannii, a Multidrug-Resistant Opportunistic Pathogen in New Habitats: A Systematic Review. Microorganisms 2024; 12:644. [PMID: 38674589 PMCID: PMC11051781 DOI: 10.3390/microorganisms12040644] [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: 02/17/2024] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 04/28/2024] Open
Abstract
In recent years, humanity has begun to face a growing challenge posed by a rise in the prevalence of antibiotic-resistant bacteria. This has resulted in an alarming surge in fatalities and the emergence of increasingly hard-to-manage diseases. Acinetobacter baumannii can be seen as one of these resilient pathogens due to its increasing prevalence in hospitals, its resistance to treatment, and its association with elevated mortality rates. Despite its clinical significance, the scientific understanding of this pathogen in non-hospital settings remains limited. Knowledge of its virulence factors is also lacking. Therefore, in this review, we seek to shed light on the latest research regarding the ecological niches, microbiological traits, and antibiotic resistance profiles of Acinetobacter baumannii. Recent studies have revealed the presence of this bacterium in a growing range of environmental niches, including rivers, treatment plants, and soils. It has also been discovered in diverse food sources such as meat and vegetables, as well as in farm animals and household pets such as dogs and cats. This broader presence of Acinetobacter baumannii, i.e., outside of hospital environments, indicates a significant risk of environmental contamination. As a result, greater levels of awareness and new preventive measures should be promoted to address this potential threat to public health.
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Affiliation(s)
- Omar E. Ahuatzin-Flores
- Posgrado en Ciencias Ambientales, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Edificio IC 6. Ciudad Universitaria, Puebla 72570, Mexico;
| | - Eduardo Torres
- Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico;
| | - Edith Chávez-Bravo
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
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Wei X, Xue B, Ruan S, Guo J, Huang Y, Geng X, Wang D, Zhou C, Zheng J, Yuan Z. Supercharged precision killers: Genetically engineered biomimetic drugs of screened metalloantibiotics against Acinetobacter baumanni. SCIENCE ADVANCES 2024; 10:eadk6331. [PMID: 38517956 PMCID: PMC10959408 DOI: 10.1126/sciadv.adk6331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 02/16/2024] [Indexed: 03/24/2024]
Abstract
To eliminate multidrug-resistant bacteria of Acinetobacter baumannii, we screened 1100 Food and Drug Administration-approved small molecule drugs and accessed the broxyquinoline (Bq) efficacy in combination with various metal ions. Antibacterial tests demonstrated that the prepared Zn(Bq)2 complex showed ultralow minimum inhibitory concentration of ~0.21 micrograms per milliliter with no resistance after 30 passages. We then constructed the nano zeolitic imidazolate framework-8 (ZIF-8) as a drug carrier of Zn(Bq)2 and also incorporated the photosensitizer chlorin e6 (Ce6) to trace and boost the antibacterial effect. To further ensure the stable and targeted delivery, we genetically engineered outer membrane vesicles (OMVs) with the ability to selectively target A. baumannii. By coating the ZnBq/Ce6@ZIF-8 core with these OMV, the resulted drug (ZnBq/Ce6@ZIF-8@OMV) exhibited exceptional killing efficacy (>99.9999999%) of A. baumannii. In addition, in vitro and in vivo tests were also respectively carried out to inspect the remarkable efficacy of this previously unknown nanodrug in eradicating A. baumannii infections, including biofilms and meningitis.
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Affiliation(s)
- Xianyuan Wei
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
| | - Bin Xue
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
- Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China
| | - Shuangchen Ruan
- Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China
| | - Jintong Guo
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
| | - Yujing Huang
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
| | - Xiaorui Geng
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
| | - Dan Wang
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China
| | - Cangtao Zhou
- Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China
| | - Jun Zheng
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
| | - Zhen Yuan
- Centre for Cognitive and brain Sciences and Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China
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Nie X, Lin M, Xu S, Zhang L, Lin X, Huang W. Strategically reducing carbapenem-resistant Acinetobacter baumannii through PDCA cycle-driven antibiotic management. Indian J Med Microbiol 2024; 48:100527. [PMID: 38185209 DOI: 10.1016/j.ijmmb.2024.100527] [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: 10/31/2023] [Revised: 12/13/2023] [Accepted: 01/02/2024] [Indexed: 01/09/2024]
Abstract
PURPOSE With the escalating global challenge of antibiotic resistance, particularly the resistance rate of Acinetobacter baumannii, the need to rationalize carbapenem antibiotic use in clinical settings has become paramount. Our study tapped into a fishbone diagram to uncover the irrationalities in applying these antibiotics and highlight potential influencing factors. METHODS Based on these analyses, we initiated targeted intervention strategies. A PDCA cycle-based scientific management approach was implemented through the combined efforts of our antimicrobial stewardship team and relevant departments. RESULTS Our study showed a significant post-intervention increase in the rational use of carbapenem antibiotics (P < 0.01) and a concurrent decrease in the detection of carbapenem-resistant Acinetobacter baumannii. CONCLUSION Our findings underscore that carbapenem usage can be effectively minimized with the continuous refinements offered by the PDCA cycle, leading to a reduction in multidrug-resistant bacteria, thus fostering rational drug use in healthcare.
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Affiliation(s)
- Xuekun Nie
- Department of Clinical Pharmacy, Ningde Municipal Hospital of Ningde Normal University, Ningde, Fujian, 352100, China; Collaborative Innovation Center of Active Ingredient Research of She Medicine (2020Z03), Innovation Center of Clinical Pharmacy Service (2023T06), Ningde Normal University, Ningde, Fujian, 352100, China.
| | - Minhua Lin
- Department of Clinical Pharmacy, Ningde Municipal Hospital of Ningde Normal University, Ningde, Fujian, 352100, China; Collaborative Innovation Center of Active Ingredient Research of She Medicine (2020Z03), Innovation Center of Clinical Pharmacy Service (2023T06), Ningde Normal University, Ningde, Fujian, 352100, China.
| | - Shuanglin Xu
- Department of Clinical Pharmacy, Ningde Municipal Hospital of Ningde Normal University, Ningde, Fujian, 352100, China; Collaborative Innovation Center of Active Ingredient Research of She Medicine (2020Z03), Innovation Center of Clinical Pharmacy Service (2023T06), Ningde Normal University, Ningde, Fujian, 352100, China.
| | - Lingling Zhang
- Department of Clinical Pharmacy, Ningde Municipal Hospital of Ningde Normal University, Ningde, Fujian, 352100, China; Collaborative Innovation Center of Active Ingredient Research of She Medicine (2020Z03), Innovation Center of Clinical Pharmacy Service (2023T06), Ningde Normal University, Ningde, Fujian, 352100, China.
| | - Xiaohui Lin
- Department of Clinical Pharmacy, Ningde Municipal Hospital of Ningde Normal University, Ningde, Fujian, 352100, China; Collaborative Innovation Center of Active Ingredient Research of She Medicine (2020Z03), Innovation Center of Clinical Pharmacy Service (2023T06), Ningde Normal University, Ningde, Fujian, 352100, China.
| | - Weiying Huang
- Department of Clinical Pharmacy, Ningde Municipal Hospital of Ningde Normal University, Ningde, Fujian, 352100, China; Collaborative Innovation Center of Active Ingredient Research of She Medicine (2020Z03), Innovation Center of Clinical Pharmacy Service (2023T06), Ningde Normal University, Ningde, Fujian, 352100, China.
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Bagińska N, Grygiel I, Orwat F, Harhala MA, Jędrusiak A, Gębarowska E, Letkiewicz S, Górski A, Jończyk-Matysiak E. Stability study in selected conditions and biofilm-reducing activity of phages active against drug-resistant Acinetobacter baumannii. Sci Rep 2024; 14:4285. [PMID: 38383718 PMCID: PMC10881977 DOI: 10.1038/s41598-024-54469-z] [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: 09/25/2023] [Accepted: 02/13/2024] [Indexed: 02/23/2024] Open
Abstract
Acinetobacter baumannii is currently a serious threat to human health, especially to people with immunodeficiency as well as patients with prolonged hospital stays and those undergoing invasive medical procedures. The ever-increasing percentage of strains characterized by multidrug resistance to widely used antibiotics and their ability to form biofilms make it difficult to fight infections with traditional antibiotic therapy. In view of the above, phage therapy seems to be extremely attractive. Therefore, phages with good storage stability are recommended for therapeutic purposes. In this work, we present the results of studies on the stability of 12 phages specific for A. baumannii under different conditions (including temperature, different pH values, commercially available disinfectants, essential oils, and surfactants) and in the urine of patients with urinary tract infections (UTIs). Based on our long-term stability studies, the most optimal storage method for the A. baumannii phage turned out to be - 70 °C. In contrast, 60 °C caused a significant decrease in phage activity after 1 h of incubation. The tested phages were the most stable at a pH from 7.0 to 9.0, with the most inactivating pH being strongly acidic. Interestingly, ethanol-based disinfectants caused a significant decrease in phage titers even after 30 s of incubation. Moreover, copper and silver nanoparticle solutions also caused a decrease in phage titers (which was statistically significant, except for the Acba_3 phage incubated in silver solution), but to a much lesser extent than disinfectants. However, bacteriophages incubated for 24 h in essential oils (cinnamon and eucalyptus) can be considered stable.
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Affiliation(s)
- Natalia Bagińska
- Bacteriophage Laboratory, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland
| | - Ilona Grygiel
- Bacteriophage Laboratory, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland
| | - Filip Orwat
- Bacteriophage Laboratory, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland
| | - Marek Adam Harhala
- Laboratory of Phage Molecular Biology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland
| | - Adam Jędrusiak
- Bacteriophage Laboratory, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland
| | - Elżbieta Gębarowska
- Division of Biogeochemistry and Environmental Microbiology, Department of Plant Protection, Wroclaw University of Environmental and Life Sciences, Grunwaldzka 53, 50-357, Wrocław, Poland
| | | | - Andrzej Górski
- Phage Therapy Unit, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland
| | - Ewa Jończyk-Matysiak
- Bacteriophage Laboratory, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wrocław, Poland.
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Wang L, Chen QW, Qin YC, Yi XL, Zeng H. Analysis of carbapenem-resistant Acinetobacter baumannii carbapenemase gene distribution and biofilm formation. INTERNATIONAL JOURNAL OF MOLECULAR EPIDEMIOLOGY AND GENETICS 2024; 15:1-11. [PMID: 38505565 PMCID: PMC10944714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/21/2024] [Indexed: 03/21/2024]
Abstract
OBJECTIVE In recent years, Acinetobacter baumannii has been appearing in hospitals with high drug resistance and strong vitality, which brings many difficulties to clinical treatment. In this study, 255 strains of A. baumannii were isolated from Youjiang Medical University for Nationalities Affiliated Hospital clinical samples and found to be highly resistant to carbapenems. The drug resistance, biofilm-forming ability, and carbapenase gene distribution of 145 carbapenem-resistant A. baumannii (CRAB) strains were analyzed statistically. METHODS The clinically isolated strains were detected using Vitek mass spectrometry and Vitek2-compact for bacterial identification and susceptibility testing, respectively. The biofilms of clinical isolates were quantitatively detected by microplate crystal violet staining, and qualitatively observed by confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). And the common carbapenemase genes were detected by polymerase chain reaction (PCR). RESULTS The 255 clinical isolates from the Youjiang District of western Guangxi Province had a high resistance rate to carbapenems antibiotics. The main specimens were from the intensive care unit (49%), and the most important specimens were sputum specimens (80%). All 145 strains of CRAB produced different degrees of biofilm, and six carbapenenase genes were detected. We found that there were significant differences in biofilm formation between resistant and sensitive strains of tobramycin, levofloxacin, ciprofloxacin, tigecycline, and doxycycline (P<0.05). The distribution of blaOXA-23 and blaOXA51 genes was significantly different from CRAB biofilm formation (P<0.05). In addition, AmpC, blaOXA-23, blaOXA-51, and TEM genes were more distributed in antibiotic-resistant strains. CONCLUSION The clinical strains have a high resistance rate to carbapenems, and the CRAB with blaOXA-51 and blaOXA-23 genes has a high resistance to antibiotics and a strong biofilm.
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Affiliation(s)
- Lin Wang
- School of Basic Medical Sciences, Youjiang Medical University for NationalitiesNo. 98 Chengxiang Road, Baise 533000, Guangxi, PR China
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for NationalitiesBaise 533000, Guangxi, PR China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Clinical Prevention and Control Technology and Leading Drug for Microorganisms with Drug Resistance in Border Ethnic AreasnBaise 533000, Guangxi, PR China
- Key Laboratory of The Prevention and Treatment of Drug-Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Education Department of Guangxi Zhuang Autonomous RegionBaise 533000, Guangxi, PR China
| | - Qi-Wei Chen
- The Affiliated Hospital of Youjiang Medical University for NationalitiesNo. 18 Zhongshan Second Road, Baise 533000, Guangxi, PR China
| | - Yan-Chun Qin
- School of Basic Medical Sciences, Youjiang Medical University for NationalitiesNo. 98 Chengxiang Road, Baise 533000, Guangxi, PR China
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for NationalitiesBaise 533000, Guangxi, PR China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Clinical Prevention and Control Technology and Leading Drug for Microorganisms with Drug Resistance in Border Ethnic AreasnBaise 533000, Guangxi, PR China
- Key Laboratory of The Prevention and Treatment of Drug-Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Education Department of Guangxi Zhuang Autonomous RegionBaise 533000, Guangxi, PR China
| | - Xue-Li Yi
- The Affiliated Hospital of Youjiang Medical University for NationalitiesNo. 18 Zhongshan Second Road, Baise 533000, Guangxi, PR China
| | - Hong Zeng
- School of Basic Medical Sciences, Youjiang Medical University for NationalitiesNo. 98 Chengxiang Road, Baise 533000, Guangxi, PR China
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for NationalitiesBaise 533000, Guangxi, PR China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Clinical Prevention and Control Technology and Leading Drug for Microorganisms with Drug Resistance in Border Ethnic AreasnBaise 533000, Guangxi, PR China
- Key Laboratory of The Prevention and Treatment of Drug-Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Education Department of Guangxi Zhuang Autonomous RegionBaise 533000, Guangxi, PR China
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de Oliveira PAA, Baboghlian J, Ramos COA, Mançano ASF, Porcari ADM, Girardello R, Ferraz LFC. Selection and validation of reference genes suitable for gene expression analysis by Reverse Transcription Quantitative real-time PCR in Acinetobacter baumannii. Sci Rep 2024; 14:3830. [PMID: 38360762 PMCID: PMC10869792 DOI: 10.1038/s41598-024-51499-5] [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: 07/18/2023] [Accepted: 01/05/2024] [Indexed: 02/17/2024] Open
Abstract
Acinetobacter baumannii is a Gram-negative bacterium considered an emerging multi-drug-resistant pathogen. Furthermore, this bacterium can survive in extreme environmental conditions, which makes it a frequent cause of nosocomial infection outbreaks. Gene expression analyses by Reverse Transcription Quantitative real-time PCR (RT-qPCR) depend on a reference gene, also called an endogenous gene, which is used to normalize the generated data and thus ensure an accurate analysis with minimal errors. Currently, gene expression analyses in A. baumannii are compromised, as there are no reports in the literature describing the identification of validated reference genes for use in RT-qPCR analyses. For this reason, we selected twelve candidate reference genes of A. baumannii and assessed their expression profile under different experimental and culture conditions. The expression stability of the candidate genes was evaluated by using statistical algorithms such as BestKeeper, geNorm, NormFinder, Delta CT, and RefFinder, in order to identify the most suitable candidate reference genes for RT-qPCR analyses. The statistical analyses indicated rpoB, rpoD, and fabD genes as the most adequate to ensure accurate normalization of RT-qPCR data in A. baumannii. The accuracy of the proposed reference genes was validated by using them to normalize the expression of the ompA gene, encoding the outer membrane protein A, in A. baumannii sensible and resistant to the antibiotic polymyxin. The present work provides suitable reference genes for precise RT-qPCR data normalization on future gene expression studies with A. baumannii.
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Affiliation(s)
| | - Juliana Baboghlian
- Laboratório de Biologia Molecular de Microrganismos, Universidade São Francisco, Bragança Paulista, SP, CEP 12916-900, Brazil
| | | | | | - Andréia de Melo Porcari
- Laboratório Multidisciplinar de Pesquisa, Universidade São Francisco, Bragança Paulista, SP, CEP 12916-900, Brazil
| | - Raquel Girardello
- Laboratório de Biologia Molecular de Microrganismos, Universidade São Francisco, Bragança Paulista, SP, CEP 12916-900, Brazil
| | - Lúcio Fábio Caldas Ferraz
- Laboratório de Biologia Molecular de Microrganismos, Universidade São Francisco, Bragança Paulista, SP, CEP 12916-900, Brazil.
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Evseev PV, Shneider MM, Kolupaeva LV, Kasimova AA, Timoshina OY, Perepelov AV, Shpirt AM, Shelenkov AA, Mikhailova YV, Suzina NE, Knirel YA, Miroshnikov KA, Popova AV. New Obolenskvirus Phages Brutus and Scipio: Biology, Evolution, and Phage-Host Interaction. Int J Mol Sci 2024; 25:2074. [PMID: 38396752 PMCID: PMC10888812 DOI: 10.3390/ijms25042074] [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: 12/29/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Two novel virulent phages of the genus Obolenskvirus infecting Acinetobacter baumannii, a significant nosocomial pathogen, have been isolated and studied. Phages Brutus and Scipio were able to infect A. baumannii strains belonging to the K116 and K82 capsular types, respectively. The biological properties and genomic organization of the phages were characterized. Comparative genomic, phylogenetic, and pangenomic analyses were performed to investigate the relationship of Brutus and Scipio to other bacterial viruses and to trace the possible origin and evolutionary history of these phages and other representatives of the genus Obolenskvirus. The investigation of enzymatic activity of the tailspike depolymerase encoded in the genome of phage Scipio, the first reported virus infecting A. baumannii of the K82 capsular type, was performed. The study of new representatives of the genus Obolenskvirus and mechanisms of action of depolymerases encoded in their genomes expands knowledge about the diversity of viruses within this taxonomic group and strategies of Obolenskvirus-host bacteria interaction.
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Affiliation(s)
- Peter V. Evseev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (M.M.S.); (O.Y.T.); (K.A.M.)
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (L.V.K.); (A.A.K.)
- Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Mikhail M. Shneider
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (M.M.S.); (O.Y.T.); (K.A.M.)
| | - Lyubov V. Kolupaeva
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (L.V.K.); (A.A.K.)
| | - Anastasia A. Kasimova
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (L.V.K.); (A.A.K.)
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.V.P.); (A.M.S.); (Y.A.K.)
| | - Olga Y. Timoshina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (M.M.S.); (O.Y.T.); (K.A.M.)
| | - Andrey V. Perepelov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.V.P.); (A.M.S.); (Y.A.K.)
| | - Anna M. Shpirt
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.V.P.); (A.M.S.); (Y.A.K.)
| | - Andrey A. Shelenkov
- Central Scientific Research Institute of Epidemiology, 111123 Moscow, Russia (Y.V.M.)
| | - Yulia V. Mikhailova
- Central Scientific Research Institute of Epidemiology, 111123 Moscow, Russia (Y.V.M.)
| | - Natalia E. Suzina
- Skryabin Institute of Biochemistry and Physiology of Microorganisms, Federal Research Center “Pushchino Center for Biological Research of the Russian Academy of Sciences”, Moscow Region, 142290 Pushchino, Russia;
| | - Yuriy A. Knirel
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.V.P.); (A.M.S.); (Y.A.K.)
| | - Konstantin A. Miroshnikov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (M.M.S.); (O.Y.T.); (K.A.M.)
| | - Anastasia V. Popova
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (L.V.K.); (A.A.K.)
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Rangel K, De-Simone SG. Treatment and Management of Acinetobacter Pneumonia: Lessons Learned from Recent World Event. Infect Drug Resist 2024; 17:507-529. [PMID: 38348231 PMCID: PMC10860873 DOI: 10.2147/idr.s431525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 01/23/2024] [Indexed: 02/15/2024] Open
Abstract
Acinetobacter pneumonia is a significant healthcare-associated infection that poses a considerable challenge to clinicians due to its multidrug-resistant nature. Recent world events, such as the COVID-19 pandemic, have highlighted the need for effective treatment and management strategies for Acinetobacter pneumonia. In this review, we discuss lessons learned from recent world events, particularly the COVID-19 pandemic, in the context of the treatment and management of Acinetobacter pneumonia. We performed an extensive literature review to uncover studies and information pertinent to the topic. The COVID-19 pandemic underscored the importance of infection control measures in healthcare settings, including proper hand hygiene, isolation protocols, and personal protective equipment use, to prevent the spread of multidrug-resistant pathogens like Acinetobacter. Additionally, the pandemic highlighted the crucial role of antimicrobial stewardship programs in optimizing antibiotic use and curbing the emergence of resistance. Advances in diagnostic techniques, such as rapid molecular testing, have also proven valuable in identifying Acinetobacter infections promptly. Furthermore, due to the limited availability of antibiotics for treating infections caused A. baumannii, alternative strategies are needed like the use of antimicrobial peptides, bacteriophages and their enzymes, nanoparticles, photodynamic and chelate therapy. Recent world events, particularly the COVID-19 pandemic, have provided valuable insights into the treatment and management of Acinetobacter pneumonia. These lessons emphasize the significance of infection control, antimicrobial stewardship, and early diagnostics in combating this challenging infection.
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Affiliation(s)
- Karyne Rangel
- Center for Technological Development in Health (CDTS)/National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, 21040-900, Brazil
- Epidemiology and Molecular Systematics Laboratory (LEMS), Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, 21040-900, Brazil
| | - Salvatore Giovanni De-Simone
- Center for Technological Development in Health (CDTS)/National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, 21040-900, Brazil
- Epidemiology and Molecular Systematics Laboratory (LEMS), Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, 21040-900, Brazil
- Program of Post-Graduation on Science and Biotechnology, Department of Molecular and Cellular Biology, Biology Institute, Federal Fluminense University, Niterói, RJ, 22040-036, Brazil
- Program of Post-Graduation on Parasitic Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, 21040-900, Brazil
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49
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Yang N, Sun M, Wang H, Hu D, Zhang A, Khan S, Chen Z, Chen D, Xie S. Progress of stimulus responsive nanosystems for targeting treatment of bacterial infectious diseases. Adv Colloid Interface Sci 2024; 324:103078. [PMID: 38215562 DOI: 10.1016/j.cis.2024.103078] [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: 08/17/2023] [Revised: 12/27/2023] [Accepted: 01/02/2024] [Indexed: 01/14/2024]
Abstract
In recent decades, due to insufficient concentration at the lesion site, low bioavailability and increasingly serious resistance, antibiotics have become less and less dominant in the treatment of bacterial infectious diseases. It promotes the development of efficient drug delivery systems, and is expected to achieve high absorption, targeted drug release and satisfactory therapy effects. A variety of endogenous stimulation-responsive nanosystems have been constructed by using special infection microenvironments (pH, enzymes, temperature, etc.). In this review, we firstly provide an extensive review of the current research progress in antibiotic treatment dilemmas and drug delivery systems. Then, the mechanism of microenvironment characteristics of bacterial infected lesions was elucidated to provide a strong theoretical basis for bacteria-targeting nanosystems design. In particular, the discussion focuses on the design principles of single-stimulus and dual-stimulus responsive nanosystems, as well as the use of endogenous stimulus-responsive nanosystems to deliver antimicrobial agents to target locations for combating bacterial infectious diseases. Finally, the challenges and prospects of endogenous stimulus-responsive nanosystems were summarized.
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Affiliation(s)
- Niuniu Yang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China; Shenzhen Institute of Nutrition and Health,Huazhong Agricultural University, Shenzhen, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Mengyuan Sun
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China
| | - Huixin Wang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China
| | - Danlei Hu
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China
| | - Aoxue Zhang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China
| | - Suliman Khan
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China
| | - Zhen Chen
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China
| | - Dongmei Chen
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.
| | - Shuyu Xie
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Wuhan, Hubei 430070, China; Shenzhen Institute of Nutrition and Health,Huazhong Agricultural University, Shenzhen, China; Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.
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50
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Li L, Gao Y, Wang L, Lu F, Ji Q, Zhang Y, Yang S, Cheng P, Sun F, Qu S. The effects of NDM-5 on Escherichia coli and the screening of interacting proteins. Front Microbiol 2024; 15:1328572. [PMID: 38348193 PMCID: PMC10861311 DOI: 10.3389/fmicb.2024.1328572] [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: 10/27/2023] [Accepted: 01/08/2024] [Indexed: 02/15/2024] Open
Abstract
Carbapenem-resistant Escherichia coli (E. coli) strains are widely distributed and spreading rapidly, creating significant challenges for clinical therapeutics. NDM-5, a novel mutant of New Delhi Metallo-β-Lactamase-1 (NDM-1), exhibits high hydrolase activity toward carbapenems. Since the genetic backgrounds of clinically isolated carbapenem-resistant E. coli are heterogeneous, it is difficult to accurately evaluate the impact of blaNDM-5 on antibiotic resistance. Herein, E. coli BL21 was transformed with a plasmid harboring blaNDM-5, and the resultant strain was named BL21 (pET-28a-blaNDM-5). Consistent with the findings of previous studies, the introduction of exogenous blaNDM-5 resulted in markedly greater resistance of E. coli to multiple β-lactam antibiotics. Compared with BL21 (pET-28a), BL21 (pET-28a-blaNDM-5) exhibited reduced motility but a significant increase in biofilm formation capacity. Furthermore, transcriptome sequencing was conducted to compare the transcriptional differences between BL21 (pET-28a) and BL21 (pET-28a-blaNDM-5). A total of 461 differentially expressed genes were identified, including those related to antibiotic resistance, such as genes associated with the active efflux system (yddA, mcbR and emrY), pili (csgC, csgF and fimD), biofilm formation (csgD, csgB and ecpR) and antioxidant processes (nuoG). Finally, the pGS21a plasmid harboring blaNDM-5 was transformed into E. coli Rosetta2, after which the expression of the NDM-5 protein was induced using isopropyl-β-D-thiogalactoside (IPTG). Using glutathione-S-transferase (GST) pull-down assays, total proteins from E. coli were scanned to screen out 82 proteins that potentially interacted with NDM-5. Our findings provide new insight into the identified proteins to identify potential antibiotic targets and design novel inhibitors of carbapenem-resistant bacteria.
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Affiliation(s)
- Lin Li
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, China
| | - Yiming Gao
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Longbo Wang
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Fang Lu
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Qianyu Ji
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Yanfang Zhang
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Shuo Yang
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
| | - Ping Cheng
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, China
| | - Feifei Sun
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, China
| | - Shaoqi Qu
- Pharmacology and Toxicology Laboratory, Animal-Derived Food Safety Innovation Team, College of Animal Science and Technology, Anhui Agricultural University, Hefei, China
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, China
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