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Silva VBD, Almeida-Bezerra JW, Pereira RLS, Alcântara BMD, Furlan CM, Coelho JJ, Coutinho HDM, Morais-Braga MFB, Oliveira AFMD. Chemical composition, antibacterial potential, and toxicity of the extracts from the stem bark of Hancornia speciosa Gomes (Apocynaceae). JOURNAL OF ETHNOPHARMACOLOGY 2024; 335:118631. [PMID: 39067831 DOI: 10.1016/j.jep.2024.118631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/15/2024] [Accepted: 07/24/2024] [Indexed: 07/30/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hancornia speciosa is a medicinal plant popularly used to treat different medical issues, including infectious diseases. Exploring the therapeutic potentialities of the extracts from medicinal plants combined with conventional antibiotic drugs is a promising horizon, especially considering the rising microbial resistance. AIM OF THE STUDY This study aimed to characterize the chemical composition of the ethereal (EEHS) and methanolic (MEHS) extracts of the stem bark of H. speciosa, and also evaluate their antibacterial and drug-modifying activity, and toxicity. MATERIALS AND METHODS The extracts were characterized by gas chromatography coupled to mass spectrometry (GC-MS). Additionally, total phenol and flavonoid contents were determined. The antibacterial and antibiotic-modifying activity was evaluated against strains of Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa using the serial microdilution method, obtaining the minimum inhibitory concentration (MIC). The toxicity assay was carried out using the Drosophila melanogaster model. RESULTS Thirty compounds were identified in the extracts of the stem bark of H. speciosa, with triterpenoids being predominant in both extracts. Additionally, fatty alcohols, carbohydrates, fatty acids, phenolic acids, and phytosterols were identified in both extracts. EEHS and MEHS extracts had considerable phenol contents (346.4 and 340.0 mg GAE/g, respectively). Flavonoids were detected in a lower proportion (7.6 and 6.9 mg QE/g, respectively). H. speciosa extracts did not display intrinsic antibacterial activity against the bacterial strains evaluated, however, they were capable of modifying the activity of gentamicin, erythromycin, and norfloxacin. EEHS increased the efficacy of norfloxacin against E. coli and S. aureus, reducing MIC values by 50%. MEHS potentiated the action of gentamicin against all bacterial strains, especially against E. coli. The extracts did not display toxicity at clinically relevant concentrations against D. melanogaster. CONCLUSION The stem bark of H. speciosa was considered a rich source of bioactive compounds. Our findings evidenced the therapeutic potential of H. speciosa extracts for the development of new pharmaceutical therapeutics against bacteria. Although the extracts did not exhibit intrinsic antibacterial activity, they enhanced the efficacy of commercial antibiotic drugs and were non-toxic at clinically relevant concentrations. Future studies are needed to elucidate the mechanisms of action of these extracts, ensuring their safety and efficacy.
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Affiliation(s)
- Viviane Bezerra da Silva
- Departamento de Botânica, Universidade Federal de Pernambuco - UFPE, Rua Professor Moraes Rego, s/n, Recife, Pernambuco, 50.670-901, Brazil.
| | - José Weverton Almeida-Bezerra
- Departamento de Ciências Biológicas, Universidade Regional do Cariri - URCA, Rua Cel. Antônio Luiz, 1161, Crato, Ceará, 63.105-000, Brazil
| | - Raimundo Luiz Silva Pereira
- Departamento de Ciências Biológicas, Universidade Regional do Cariri - URCA, Rua Cel. Antônio Luiz, 1161, Crato, Ceará, 63.105-000, Brazil
| | - Bruno Melo de Alcântara
- Departamento de Ciências Biológicas, Universidade Regional do Cariri - URCA, Rua Cel. Antônio Luiz, 1161, Crato, Ceará, 63.105-000, Brazil
| | - Cláudia Maria Furlan
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, 05508-090, Brazil
| | - Janerson José Coelho
- Universidade Estadual do Ceará - UECE, Faculdade de Educação, Ciências e Letras dos Inhamuns - CECITEC, Tauá, 63660-000, Ceará, Brazil
| | - Henrique Douglas Melo Coutinho
- Departamento de Química Biológica, Universidade Regional do Cariri - URCA, Rua Cel. Antônio Luiz, 1161, Crato, Ceará, 63.105-000, Brazil
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Luo Q, Lu P, Chen Y, Shen P, Zheng B, Ji J, Ying C, Liu Z, Xiao Y. ESKAPE in China: epidemiology and characteristics of antibiotic resistance. Emerg Microbes Infect 2024; 13:2317915. [PMID: 38356197 PMCID: PMC10896150 DOI: 10.1080/22221751.2024.2317915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/08/2024] [Indexed: 02/16/2024]
Abstract
The escalation of antibiotic resistance and the diminishing antimicrobial pipeline have emerged as significant threats to public health. The ESKAPE pathogens - Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp. - were initially identified as critical multidrug-resistant bacteria, demanding urgently effective therapies. Despite the introduction of various new antibiotics and antibiotic adjuvants, such as innovative β-lactamase inhibitors, these organisms continue to pose substantial therapeutic challenges. People's Republic of China, as a country facing a severe bacterial resistance situation, has undergone a series of changes and findings in recent years in terms of the prevalence, transmission characteristics and resistance mechanisms of antibiotic resistant bacteria. The increasing levels of population mobility have not only shaped the unique characteristics of antibiotic resistance prevalence and transmission within People's Republic of China but have also indirectly reflected global patterns of antibiotic-resistant dissemination. What's more, as a vast nation, People's Republic of China exhibits significant variations in the levels of antibiotic resistance and the prevalence characteristics of antibiotic resistant bacteria across different provinces and regions. In this review, we examine the current epidemiology and characteristics of this important group of bacterial pathogens, delving into relevant mechanisms of resistance to recently introduced antibiotics that impact their clinical utility in China.
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Affiliation(s)
- Qixia Luo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Ping Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Yunbo Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Ping Shen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Beiwen Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Jinru Ji
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Chaoqun Ying
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Zhiying Liu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital of Medical School, College of medicine, Zhejiang University, Hangzhou, People’s Republic of China
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Deshpande A, Likhar R, Khan T, Omri A. Decoding drug resistance in Mycobacterium tuberculosis complex: genetic insights and future challenges. Expert Rev Anti Infect Ther 2024:1-17. [PMID: 39219506 DOI: 10.1080/14787210.2024.2400536] [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: 03/25/2024] [Revised: 06/02/2024] [Accepted: 08/31/2024] [Indexed: 09/04/2024]
Abstract
INTRODUCTION Tuberculosis (TB), particularly its drug-resistant forms (MDR-TB and XDR-TB), continues to pose a significant global health challenge. Despite advances in treatment and diagnosis, the evolving nature of drug resistance in Mycobacterium tuberculosis (MTB) complicates TB eradication efforts. This review delves into the complexities of anti-TB drug resistance, its mechanisms, and implications on healthcare strategies globally. AREAS COVERED We explore the genetic underpinnings of resistance to both first-line and second-line anti-TB drugs, highlighting the role of mutations in key genes. The discussion extends to advanced diagnostic techniques, such as Whole-Genome Sequencing (WGS), CRISPR-based diagnostics and their impact on identifying and managing drug-resistant TB. Additionally, we discuss artificial intelligence applications, current treatment strategies, challenges in managing MDR-TB and XDR-TB, and the global disparities in TB treatment and control, translating to different therapeutic outcomes and have the potential to revolutionize our understanding and management of drug-resistant tuberculosis. EXPERT OPINION The current landscape of anti-TB drug resistance demands an integrated approach combining advanced diagnostics, novel therapeutic strategies, and global collaborative efforts. Future research should focus on understanding polygenic resistance and developing personalized medicine approaches. Policymakers must prioritize equitable access to diagnosis and treatment, enhancing TB control strategies, and support ongoing research and augmented government funding to address this critical public health issue effectively.
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Affiliation(s)
- Amey Deshpande
- Department of Pharmaceutical Chemistry, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
- Department of Pharmaceutical Chemistry, Bharati Vidyapeeth's College of Pharmacy, Navi Mumbai, India
| | - Rupali Likhar
- Department of Pharmaceutical Chemistry, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
- Department of Pharmaceutical Chemistry, LSHGCT's Gahlot Institute of Pharmacy, Navi Mumbai, India
| | - Tabassum Khan
- Department of Pharmaceutical Chemistry, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
| | - Abdelwahab Omri
- The Novel Drug & Vaccine Delivery Systems Facility, Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Ontario, Canada
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Chen C, Li X, Wang Y, Sun Y, Bao Y, Zhang J, Zhang R, Kwok RTK, Lam JWY, Mao D, Hou P, Tang BZ. Exciting Bacteria to a Hypersensitive State for Enhanced Aminoglycoside Therapy by a Rationally Constructed AIE Luminogen. Adv Healthc Mater 2024; 13:e2400362. [PMID: 38768110 DOI: 10.1002/adhm.202400362] [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: 02/20/2024] [Revised: 05/14/2024] [Indexed: 05/22/2024]
Abstract
The diminishing effectiveness of existing aminoglycoside antibiotics (AGs) compels scientists to seek new approaches to enhance the sensitivity of current AGs. Despite ongoing efforts, currently available approaches remain restricted. Herein, a novel strategy involving the rational construction of an aggregation-induced-emission luminogen (AIEgen) is introduced to significantly enhance Gram-positive bacteria's susceptibility to AGs. The application of this approach involves the simple addition of AIEgens to bacteria followed by a 5 min light irradiation. Under light exposure, AIEgens efficiently generate reactive oxygen species (ROS), elevating intrabacterial ROS levels to a nonlethal threshold. Post treatment, the bacteria swiftly enter a hypersensitive state, resulting in a 21.9-fold, 15.5-fold, or 7.2-fold increase in susceptibility to three AGs: kanamycin, gentamycin, and neomycin, respectively. Remarkably, this approach is specific to AGs, and the induced hypersensitivity displays unparalleled longevity and heritability. Further in vivo studies confirm a 7.0-fold enhanced bactericidal ability of AGs against Gram-positive bacteria through this novel approach. This research not only broadens the potential applications of AIEgens but also introduces a novel avenue to bolster the effectiveness of AGs in combating bacterial infections.
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Affiliation(s)
- Chao Chen
- Department of Endocrinology, Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
- Department of Chemistry, Department of Chemical and Biological Engineering and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Xing Li
- Department of Endocrinology, Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Yilin Wang
- Department of Endocrinology, Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Yingshu Sun
- Department of Endocrinology, Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Yixuan Bao
- Department of Endocrinology, Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Jianyu Zhang
- Department of Chemistry, Department of Chemical and Biological Engineering and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Ruoyao Zhang
- School of Medical Technology, Institute of Engineering Medicine, Beijing Key Laboratory for Separation and Analysis in Biomedicine and Pharmaceuticals, Beijing Institute of Technology, Beijing, 100081, China
| | - Ryan T K Kwok
- Department of Chemistry, Department of Chemical and Biological Engineering and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Jacky W Y Lam
- Department of Chemistry, Department of Chemical and Biological Engineering and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Duo Mao
- Precision Medicine Institute, The First Affiliated Hospital of Sun Yat-Sen University, Sun Yat-Sen University, Guangzhou, 510080, P. R. China
| | - Peng Hou
- Department of Endocrinology, Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Ben Zhong Tang
- Department of Chemistry, Department of Chemical and Biological Engineering and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon, Hong Kong, P. R. China
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong, 518172, China
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Yildirim M, Ozgeris B, Gormez A. The effect of novel β-lactam derivatives synthesized from substituted phenethylamines on resistance genes of MRSA isolates. J Antibiot (Tokyo) 2024:10.1038/s41429-024-00769-5. [PMID: 39210001 DOI: 10.1038/s41429-024-00769-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 07/31/2024] [Accepted: 08/05/2024] [Indexed: 09/04/2024]
Abstract
This study focuses on the activity of previously reported imine and β-lactam derivatives against methicillin-resistant Staphylococcus aureus (MRSA) isolates. The presence of mecA and blaZ genes in the isolates was determined, and the minimum inhibitory concentration (MIC) values were determined based on the antibacterial activity against these isolates. Active compounds were selected and their ability to act against resistant isolates in vitro was determined. Concurrently, biochemical (nitrocefin) and molecular (qRT-PCR) tests were used to investigate the ability of the compounds to induce resistance genes in MRSA isolates. The cytotoxicity of the compounds on human dermal fibroblasts (HDF) was investigated. The MIC values of compounds (10) and (12) against MSSA and MRSA isolates were 7.81 and 15.62 μg ml-1, respectively. The most active compounds were identified as (10) and (12), and it was observed that the isolates did not develop resistance to these compounds in vitro. These compounds were found to inhibit β-lactamase, reduce the expression of resistance genes, and exhibit reduced HDF cell toxicity in a dose-dependent manner. According to the findings of the study, it can be concluded that these compounds show promise as hits with an interesting mechanism of action for further chemical modifications to develop new MRSA inhibitors.
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Affiliation(s)
- Merve Yildirim
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, 25050, Turkey
| | - Bunyamin Ozgeris
- Department of Basic Sciences, Faculty of Science, Erzurum Technical University, Erzurum, 25050, Turkey
| | - Arzu Gormez
- Department of Biology, Faculty of Science, Dokuz Eylul University, Izmir, 35390, Turkey.
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Bellucci MC, Romani C, Sani M, Volonterio A. Dual Antibiotic Approach: Synthesis and Antibacterial Activity of Antibiotic-Antimicrobial Peptide Conjugates. Antibiotics (Basel) 2024; 13:783. [PMID: 39200083 PMCID: PMC11352213 DOI: 10.3390/antibiotics13080783] [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: 07/23/2024] [Revised: 08/16/2024] [Accepted: 08/18/2024] [Indexed: 09/01/2024] Open
Abstract
In recent years, bacterial resistance to conventional antibiotics has become a major concern in the medical field. The global misuse of antibiotics in clinics, personal use, and agriculture has accelerated this resistance, making infections increasingly difficult to treat and rendering new antibiotics ineffective more quickly. Finding new antibiotics is challenging due to the complexity of bacterial mechanisms, high costs and low financial incentives for the development of new molecular scaffolds, and stringent regulatory requirements. Additionally, innovation has slowed, with many new antibiotics being modifications of existing drugs rather than entirely new classes. Antimicrobial peptides (AMPs) are a valid alternative to small-molecule antibiotics offering several advantages, including broad-spectrum activity and a lower likelihood of inducing resistance due to their multifaceted mechanisms of action. However, AMPs face challenges such as stability issues in physiological conditions, potential toxicity to human cells, high production costs, and difficulties in large-scale manufacturing. A reliable strategy to overcome the drawbacks associated with the use of small-molecule antibiotics and AMPs is combination therapy, namely the simultaneous co-administration of two or more antibiotics or the synthesis of covalently linked conjugates. This review aims to provide a comprehensive overview of the literature on the development of antibiotic-AMP conjugates, with a particular emphasis on critically analyzing the design and synthetic strategies employed in their creation. In addition to the synthesis, the review will also explore the reported antibacterial activity of these conjugates and, where available, examine any data concerning their cytotoxicity.
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Affiliation(s)
- Maria Cristina Bellucci
- Department of Food, Environmental, and Nutritional Sciences, Università degli Studi di Milano, Via Celoria 2, 20131 Milano, Italy;
| | - Carola Romani
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy;
| | - Monica Sani
- Consiglio Nazionale delle Ricerche, Istituto di Scienze e Tecnologie Chimica “G. Natta” (SCITEC), Via Mario Bianco 9, 20131 Milano, Italy;
| | - Alessandro Volonterio
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy;
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Kever L, Zhang Q, Hardy A, Westhoff P, Yu Y, Frunzke J. Resistance against aminoglycoside antibiotics via drug or target modification enables community-wide antiphage defense. MICROLIFE 2024; 5:uqae015. [PMID: 39205678 PMCID: PMC11350373 DOI: 10.1093/femsml/uqae015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 07/02/2024] [Accepted: 08/14/2024] [Indexed: 09/04/2024]
Abstract
The ongoing arms race between bacteria and phages has forced bacteria to evolve a sophisticated set of antiphage defense mechanisms that constitute the bacterial immune system. In our previous study, we highlighted the antiphage properties of aminoglycoside antibiotics, which are naturally secreted by Streptomyces. Successful inhibition of phage infection was achieved by addition of pure compounds and supernatants from a natural producer strain emphasizing the potential for community-wide antiphage defense. However, given the dual functionality of these compounds, neighboring bacterial cells require resistance to the antibacterial activity of aminoglycosides to benefit from the protection they confer against phages. In this study, we tested a variety of different aminoglycoside resistance mechanisms acting via drug or target (16S rRNA) modification and demonstrated that they do not interfere with the antiphage properties of the molecules. Furthermore, we confirmed the antiphage impact of aminoglycosides in a community context by coculturing phage-susceptible, apramycin-resistant Streptomyces venezuelae with the apramycin-producing strain Streptoalloteichus tenebrarius. Given the prevalence of aminoglycoside resistance among natural bacterial isolates, this study highlights the ecological relevance of chemical defense via aminoglycosides at the community level.
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Affiliation(s)
- Larissa Kever
- Institute of Bio-und Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Qian Zhang
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Hubei Clinical Center and Key Laboratory of Intestinal and Colorectal Disease, School of Pharmaceutical Sciences, Wuhan University, 185 East Lake Road, Wuhan 430071, China
| | - Aël Hardy
- Institute of Bio-und Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Philipp Westhoff
- Institute of Plant Biochemistry, Heinrich-Heine University Düsseldorf, Düsseldorf 40225, Germany
| | - Yi Yu
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Hubei Clinical Center and Key Laboratory of Intestinal and Colorectal Disease, School of Pharmaceutical Sciences, Wuhan University, 185 East Lake Road, Wuhan 430071, China
| | - Julia Frunzke
- Institute of Bio-und Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, Jülich 52425, Germany
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Trosvik P, Noordzij HT, de Muinck EJ. Antibiotic resistance gene dynamics in the commensal infant gut microbiome over the first year of life. Sci Rep 2024; 14:18701. [PMID: 39134593 PMCID: PMC11319485 DOI: 10.1038/s41598-024-69275-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 08/02/2024] [Indexed: 08/15/2024] Open
Abstract
Colonization of the infant gut is an important developmental process characterized by high carriage of antimicrobial resistance genes (ARGs) and high abundances of pathobionts. The horizontal transfer of ARGs to pathogenic bacteria represents a major public health concern. However, there is still a paucity of longitudinal studies surveilling ARGs in healthy infant guts at high temporal resolution. Furthermore, we do not yet have a clear view of how temporal variation in ARG carriage relates to the dynamics of specific bacterial populations, as well as community virulence potential. Here, we performed deep shotgun metagenomic sequencing of monthly fecal samples from a cohort of 12 infants, covering the first year of life to interrogate the infant gut microbiome for ARG content. We further relate ARG dynamics to the dynamics of taxa, virulence potential, as well as the potential for ARG mobilization. We identify a core resistome dominated by efflux systems typically associated with Enterobacteriaceae. Overall ARG carriage declined over the first year of life and showed strong contemporaneous correlation with the population dynamics of Proteobacteria. Furthermore, the majority of ARGs could be further mapped to metagenome-assembled genomes (MAGs) classified to this phylum. We were able to assign a large number of ARGs to E. coli by correlating the temporal dynamics of individual genes with species dynamics, and we show that the temporal dynamics of ARGs and virulence factors are highly correlated, suggesting close taxonomic associations between these two gene classes. Finally, we identify ARGs linked with various categories of mobile genetic elements, demonstrating preferential linkage among mobility categories and resistance to different drug classes. While individual variation in ARG carriage is substantial during infancy there is a clear reduction over the first year of life. With few exceptions, ARG abundances closely track the dynamics of pathobionts and community virulence potential. These findings emphasize the potential for development of resistant pathogens in the developing infant gut, and the importance of effective surveillance in order to detect such events.
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Affiliation(s)
- Pål Trosvik
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Oslo, Norway.
| | - Hanna Theodora Noordzij
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Oslo, Norway
| | - Eric Jacques de Muinck
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Oslo, Norway
- Department of Pharmacy, University of Oslo, Oslo, Norway
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Temaj G, Chichiarelli S, Telkoparan-Akillilar P, Saha S, Nuhii N, Hadziselimovic R, Saso L. P53: A key player in diverse cellular processes including nuclear stress and ribosome biogenesis, highlighting potential therapeutic compounds. Biochem Pharmacol 2024; 226:116332. [PMID: 38830426 DOI: 10.1016/j.bcp.2024.116332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 05/28/2024] [Accepted: 05/30/2024] [Indexed: 06/05/2024]
Abstract
The tumor suppressor proteins are key transcription factors involved in the regulation of various cellular processes, such as apoptosis, DNA repair, cell cycle, senescence, and metabolism. The tumor suppressor protein p53 responds to different type of stress signaling, such as hypoxia, DNA damage, nutrient deprivation, oncogene activation, by activating or repressing the expression of different genes that target processes mentioned earlier. p53 has the ability to modulate the activity of many other proteins and signaling pathway through protein-protein interaction, post-translational modifications, or non-coding RNAs. In many cancers the p53 is found to be mutated or inactivated, resulting in the loss of its tumor suppressor function and acquisition of new oncogenic properties. The tumor suppressor protein p53 also plays a role in the development of other metabolic disorders such as diabetes, obesity, and fatty liver disease. In this review, we will summarize the current data and knowledge on the molecular mechanisms and the functions of p53 in different pathways and processes at the cellular level and discuss the its implications for human health and disease.
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Affiliation(s)
- Gazmend Temaj
- Faculty of Pharmacy, College UBT, 10000 Prishtina, Kosovo.
| | - Silvia Chichiarelli
- Department of Biochemical Sciences "A. Rossi-Fanelli", Sapienza University of Rome, 00185 Rome, Italy.
| | | | - Sarmistha Saha
- Department of Biotechnology, Institute of Applied Sciences & Humanities, GLA University, Mathura 00185, Uttar Pradesh, India.
| | - Nexhibe Nuhii
- Department of Pharmacy, Faculty of Medical Sciences, State University of Tetovo, 1200 Tetovo, Macedonia.
| | - Rifat Hadziselimovic
- Faculty of Science, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina.
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer", La Sapienza University, 00185 Rome, Italy.
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Hanessian S. My 50-Plus Years of Academic Research Collaborations with Industry. A Retrospective. J Org Chem 2024; 89:9147-9186. [PMID: 38865159 DOI: 10.1021/acs.joc.4c00652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A retrospective is presented highlighting the synthesis of selected "first-in-kind" natural products, their synthetic analogues, structure elucidations, and rationally designed bioactive synthetic compounds that were accomplished because of collaborations with past and present pharmaceutical and agrochemical companies. Medicinal chemistry projects involving structure-based design exploiting cocrystal structures of small molecules with biologically relevant enzymes, receptors, and bacterial ribosomes with synthetic small molecules leading to marketed products, clinical candidates, and novel drug prototypes were realized in collaboration. Personal reflections, historical insights, behind the scenes stories from various long-term projects are shared in this retrospective article.
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Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Succ. Centre-ville, Montréal, Québec, Canada H3C 3J7
- Department of Pharmaceutical Sciences, University of California, Irvine, California 91266, United States
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Halim J, Carr RA, Fliorent R, Jonnalagadda K, Kurbonnazarova M, Kaur M, Millstein I, Carabetta VJ. Combinations of Antibiotics Effective against Extensively- and Pandrug-Resistant Acinetobacter baumannii Patient Isolates. Microorganisms 2024; 12:1353. [PMID: 39065123 PMCID: PMC11279082 DOI: 10.3390/microorganisms12071353] [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: 03/19/2024] [Revised: 06/24/2024] [Accepted: 06/30/2024] [Indexed: 07/28/2024] Open
Abstract
Infections due to drug-resistant Acinetobacter baumannii strains are increasing and cause significant morbidity and mortality, especially in hospitalized and critically ill patients. A. baumannii rapidly develops resistance to numerous antibiotics, and antibiotics traditionally used against this deadly pathogen have been failing in recent years, highlighting the need to identify new treatment strategies. Treatment options that have shown promise include revisiting common antibiotics not typically used against A. baumannii, evaluating new antibiotics recently introduced to market, and identifying combinations of antibiotics that display synergistic interactions. In this study, we characterized the antibiotic susceptibility profiles of extensively (XDR) and pandrug-resistant (PDR) A. baumannii patient isolates. We examined the potency of 22 standard-of-care antibiotics and the newer antibiotics eravacycline, omadacycline, and plazomicin against these strains. Furthermore, we examined combinations of these antibiotics against our collection to identify synergistic effects. We found that this collection is highly resistant to most or all standard-of-care antibiotics, except for minocycline and rifampin. We show that eravacycline and omadacycline are effective against these strains based on minimum inhibitory concentrations. We also identified two highly effective combinations, cefepime and amikacin and cefepime and ampicillin-sulbactam, which exhibited high rates of synergy against this collection. This information is valuable in our battle against highly drug resistant and virtually untreatable A. baumannii infections.
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Affiliation(s)
- Justin Halim
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ 08103, USA; (J.H.); (R.A.C.); (I.M.)
| | - Rachel A. Carr
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ 08103, USA; (J.H.); (R.A.C.); (I.M.)
| | - Rebecca Fliorent
- Rowan-Virtua School of Osteopathic Medicine, Stratford, NJ 08084, USA; (R.F.); (K.J.); (M.K.); (M.K.)
| | - Keertana Jonnalagadda
- Rowan-Virtua School of Osteopathic Medicine, Stratford, NJ 08084, USA; (R.F.); (K.J.); (M.K.); (M.K.)
| | - Maftuna Kurbonnazarova
- Rowan-Virtua School of Osteopathic Medicine, Stratford, NJ 08084, USA; (R.F.); (K.J.); (M.K.); (M.K.)
| | - Muskanjot Kaur
- Rowan-Virtua School of Osteopathic Medicine, Stratford, NJ 08084, USA; (R.F.); (K.J.); (M.K.); (M.K.)
| | - Ian Millstein
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ 08103, USA; (J.H.); (R.A.C.); (I.M.)
| | - Valerie J. Carabetta
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ 08103, USA; (J.H.); (R.A.C.); (I.M.)
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12
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Ferrando N, Pino-Otín MR, Terrado E, Ballestero D, Langa E. Bioactivity of Eugenol: A Potential Antibiotic Adjuvant with Minimal Ecotoxicological Impact. Int J Mol Sci 2024; 25:7069. [PMID: 39000177 PMCID: PMC11241589 DOI: 10.3390/ijms25137069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 06/12/2024] [Accepted: 06/21/2024] [Indexed: 07/16/2024] Open
Abstract
Combining commercial antibiotics with adjuvants to lower their minimum inhibitory concentration (MIC) is vital in combating antimicrobial resistance. Evaluating the ecotoxicity of such compounds is crucial due to environmental and health risks. Here, eugenol was assessed as an adjuvant for 7 commercial antibiotics against 14 pathogenic bacteria in vitro, also examining its acute ecotoxicity on various soil and water organisms (microbiota, Vibrio fischeri, Daphnia magna, Eisenia foetida, and Allium cepa). Using microdilution methods, checkerboard assays, and kinetic studies, the MICs for eugenol were determined together with the nature of its combinations with antibiotics against bacteria, some unexposed to eugenol previously. The lethal dose for the non-target organisms was also determined, as well as the Average Well Color Development and the Community-Level Physiological Profiling for soil and water microbiota. Our findings indicate that eugenol significantly reduces MICs by 75 to 98%, which means that it could be a potent adjuvant. Ecotoxicological assessments showed eugenol to be less harmful to water and soil microbiota compared to studied antibiotics. While Vibrio fischeri and Daphnia magna were susceptible, Allium cepa and Eisenia foetida were minimally affected. Given that only 0.1% of eugenol is excreted by humans without metabolism, its environmental risk when used with antibiotics appears minimal.
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Affiliation(s)
- Natalia Ferrando
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autovía Mudéjar, km. 299, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.)
| | - María Rosa Pino-Otín
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autovía Mudéjar, km. 299, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.)
| | - Eva Terrado
- Facultad de Educación, Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain;
| | - Diego Ballestero
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autovía Mudéjar, km. 299, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.)
| | - Elisa Langa
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autovía Mudéjar, km. 299, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.)
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13
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Demars M, McDowell T, Renaud JB, Scott A, Fruci M, Topp E. Persistence and evidence for accelerated biodegradation of streptomycin in agricultural soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 929:172502. [PMID: 38636872 DOI: 10.1016/j.scitotenv.2024.172502] [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: 11/06/2023] [Revised: 04/12/2024] [Accepted: 04/13/2024] [Indexed: 04/20/2024]
Abstract
Some antibiotics are used for the treatment of various bacterial crop diseases, and there is a concern that this practice may represent a selection pressure that increases the reservoir of antibiotic resistance carried by bacteria in crop production systems. Since the 1950s the aminoglycoside antibiotic streptomycin has been widely used for the treatment of some bacterial crop diseases such as fire blight in apples and pears. Following application, the time that bacteria will be exposed to the antibiotic, and therefore the pressure for selection of resistance, will vary according to the environmental persistence of the antibiotic. In the present study, the dissipation of streptomycin was examined in soils supplemented with 5 mg streptomycin/kg soil and incubated for 21 days under laboratory conditions. The impact of two key rate-controlling variables, soil texture (sandy loam, loam, clay loam) and temperature (4, 20, 30 °C) on streptomycin persistence were explored. -Robust methods for streptomycin extraction and analysis by LC-MS/MS were developed. Streptomycin dissipation followed first order kinetics, with the time to dissipate 50 % of the parent compound (DT50) in soils of varying texture incubated at 20 °C ranging from about seven to 15 days. In contrast, the DT50 of streptomycin in autoclaved loam soil incubated at 20 °C was about 111 days. At 4 °C the DT50 ranged from 49 to 137 days. Under no incubation conditions were any extractable transformation products obtained. Streptomycin was dissipated significantly more rapidly in field soil that had a prior history of exposure to the antibiotic than in soil that did not. Taken together, these results indicate that streptomycin is amenable to biodegradation in agricultural soils with DT50s of several days when temperature is permissive.
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Affiliation(s)
- Megan Demars
- London Research and Development Centre, Agriculture and Agri-Food Canada, London, ON, Canada; Department of Biology, University of Western Ontario, London, ON, Canada
| | - Tim McDowell
- London Research and Development Centre, Agriculture and Agri-Food Canada, London, ON, Canada
| | - Justin B Renaud
- London Research and Development Centre, Agriculture and Agri-Food Canada, London, ON, Canada
| | - Andrew Scott
- London Research and Development Centre, Agriculture and Agri-Food Canada, London, ON, Canada
| | - Michael Fruci
- London Research and Development Centre, Agriculture and Agri-Food Canada, London, ON, Canada; Department of Microbiology and Immunology, University of Western Ontario, London, ON, Canada
| | - Edward Topp
- London Research and Development Centre, Agriculture and Agri-Food Canada, London, ON, Canada; Department of Biology, University of Western Ontario, London, ON, Canada.
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14
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Bava R, Castagna F, Lupia C, Poerio G, Liguori G, Lombardi R, Naturale MD, Mercuri C, Bulotta RM, Britti D, Palma E. Antimicrobial Resistance in Livestock: A Serious Threat to Public Health. Antibiotics (Basel) 2024; 13:551. [PMID: 38927217 PMCID: PMC11200672 DOI: 10.3390/antibiotics13060551] [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: 04/30/2024] [Revised: 06/04/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Antimicrobial resistance represents an alarming public health problem; its importance is related to the significant clinical implications (increased morbidity, mortality, disease duration, development of comorbidities, and epidemics), as well as its economic effects on the healthcare sector. In fact, therapeutic options are severely limited by the advent and spread of germs resistant to many antibiotics. The situation worldwide is worrying, especially in light of the prevalence of Gram-negative bacteria-Klebsiella pneumoniae and Acinetobacter baumannii-which are frequently isolated in hospital environments and, more specifically, in intensive care units. The problem is compounded by the ineffective treatment of infections by patients who often self-prescribe therapy. Resistant bacteria also show resistance to the latest generation antibiotics, such as carbapenems. In fact, superbacteria, grouped under the acronym extended-spectrum betalactamase (ESBL), are becoming common. Antibiotic resistance is also found in the livestock sector, with serious repercussions on animal production. In general, this phenomenon affects all members of the biosphere and can only be addressed by adopting a holistic "One Health" approach. In this literature overview, a stock is taken of what has been learned about antibiotic resistance, and suggestions are proposed to stem its advance.
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Affiliation(s)
- Roberto Bava
- Department of Health Sciences, University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy; (R.B.); (C.L.); (R.M.B.); (D.B.); (E.P.)
| | - Fabio Castagna
- Department of Health Sciences, University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy; (R.B.); (C.L.); (R.M.B.); (D.B.); (E.P.)
- Mediterranean Ethnobotanical Conservatory, Sersale (CZ), 88054 Catanzaro, Italy
| | - Carmine Lupia
- Department of Health Sciences, University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy; (R.B.); (C.L.); (R.M.B.); (D.B.); (E.P.)
- Mediterranean Ethnobotanical Conservatory, Sersale (CZ), 88054 Catanzaro, Italy
| | - Giusi Poerio
- ATS Val Padana, Via dei Toscani, 46100 Mantova, Italy;
| | | | - Renato Lombardi
- IRCCS Casa Sollievo Della Sofferenza, San Giovanni Rotondo (FG), 71013 Foggia, Italy;
| | - Maria Diana Naturale
- Ministry of Health, Directorate General for Health Programming, 00144 Rome, Italy;
| | - Caterina Mercuri
- Department of Experimental and Clinical Medicine, University “Magna Graecia”, 88100 Catanzaro, Italy;
| | - Rosa Maria Bulotta
- Department of Health Sciences, University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy; (R.B.); (C.L.); (R.M.B.); (D.B.); (E.P.)
| | - Domenico Britti
- Department of Health Sciences, University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy; (R.B.); (C.L.); (R.M.B.); (D.B.); (E.P.)
| | - Ernesto Palma
- Department of Health Sciences, University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy; (R.B.); (C.L.); (R.M.B.); (D.B.); (E.P.)
- Center for Pharmacological Research, Food Safety, High Tech and Health (IRC-FSH), University of Catanzaro Magna Græcia, 88100 Catanzaro, Italy
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15
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Fu Y, Hu F, Wang F, Xu M, Jia Z, Amelung W, Mei Z, Han X, Virta M, Jiang X, Tiedje JM. Distinct Assembly Patterns of Soil Antibiotic Resistome Revealed by Land-Use Changes over 30 Years. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10216-10226. [PMID: 38802328 DOI: 10.1021/acs.est.3c10423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Compared with the ever-growing information about the anthropogenic discharge of nutrients, metals, and antibiotics on the disturbance of antibiotic resistance genes (ARGs), less is known about how the potential natural stressors drive the evolutionary processes of antibiotic resistance. This study examined how soil resistomes evolved and differentiated over 30 years in various land use settings with spatiotemporal homogeneity and minimal human impact. We found that the contents of soil organic carbon, nitrogen, soil microbial biomass, and bioavailable heavy metals, as well as related changes in the antibiotic resistome prevalence including diversity and abundance, declined in the order of grassland > cropland > bareland. Sixty-nine remaining ARGs and 14 mobile genetic elements (MGEs) were shared among three land uses. Multiple factors (i.e., soil properties, heavy metals, bacterial community, and MGEs) contributed to the evolutionary changes of the antibiotic resistome, wherein the resistome profile was dominantly driven by MGEs from both direct and indirect pathways, supported by a partial least-squares path model analysis. Our results suggest that pathways to mitigate ARGs in soils can coincide with land degradation processes, posing a challenge to the common goal of managing our environment sustainably.
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Affiliation(s)
- Yuhao Fu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Hu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Chongqing Changan Automobile Co., Ltd., Chongqing 400023, China
| | - Fang Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhongjun Jia
- University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun130102,China
| | - Wulf Amelung
- Agrosphere institute (IBG-3), Forschungszentrum Jülich GmbH, 52428Jülich ,Germany
- Institute of Crop Science and Resource Conservation (INRES)-Soil Science and Soil Ecology, University of Bonn, 53113Bonn, Germany
| | - Zhi Mei
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Department of Microbiology, University of Helsinki, Viikinkaari 9, 00014Helsinki,Finland
| | - Xiaozeng Han
- University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China
| | - Marko Virta
- Department of Microbiology, University of Helsinki, Viikinkaari 9, 00014Helsinki,Finland
| | - Xin Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - James M Tiedje
- Center for Microbial Ecology, Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824, United States
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16
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Lekshmi M, Ortiz-Alegria A, Kumar S, Varela MF. Major facilitator superfamily efflux pumps in human pathogens: Role in multidrug resistance and beyond. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100248. [PMID: 38974671 PMCID: PMC11225705 DOI: 10.1016/j.crmicr.2024.100248] [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] [Indexed: 07/09/2024] Open
Abstract
The major facilitator superfamily (MFS) of proteins constitutes a large group of related solute transporters found across all known living taxa of organisms. The transporters of the MFS contain an extremely diverse array of substrates, including ions, molecules of intermediary metabolism, and structurally different antimicrobial agents. First discovered over 30 years ago, the MFS represents an important collection of integral membrane transporters. Bacterial microorganisms expressing multidrug efflux pumps belonging to the MFS are considered serious pathogens, accounting for alarming morbidity and mortality numbers annually. This review article considers recent advances in the structure-function relationships, the transport mechanism, and modulation of MFS multidrug efflux pumps within the context of drug resistance mechanisms of bacterial pathogens of public health concerns.
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Affiliation(s)
- Manjusha Lekshmi
- QC Laboratory, Post Harvest Technology, ICAR-Central Institute of Fisheries Education (CIFE), Mumbai 400061, India
| | - Anely Ortiz-Alegria
- Department of Biology, Eastern New Mexico University, Portales, NM 88130, United States
| | - Sanath Kumar
- QC Laboratory, Post Harvest Technology, ICAR-Central Institute of Fisheries Education (CIFE), Mumbai 400061, India
| | - Manuel F. Varela
- Department of Biology, Eastern New Mexico University, Portales, NM 88130, United States
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17
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Umeda K, Anraku M, Yamaguchi T, Nakamura H, Kawahara R. Genetic characterization of KHM-1 metallo-β-lactamase-producing Enterobacterales isolates from inpatient sources in Osaka, Japan. J Glob Antimicrob Resist 2024; 37:48-52. [PMID: 38430961 DOI: 10.1016/j.jgar.2024.02.014] [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: 08/29/2023] [Revised: 02/04/2024] [Accepted: 02/15/2024] [Indexed: 03/05/2024] Open
Abstract
OBJECTIVES KHM-1-metallo-β-lactamase-producing Enterobacterales strains, of which only a few have been found, were isolated from four inpatients in Osaka, Japan during 2016 to 2020. We compared whole genomes of the four KHM-1-producing isolates, including one Enterobacter hormaechei subsp. hoffmannii, one Escherichia coli, and two Citrobacter freundii. METHODS These isolates were characterized by whole-genome sequencing, comparative analysis of blaKHM-1-encoding plasmids with earlier reported plasmids, and antimicrobial susceptibility tests. RESULTS Multilocus sequence typing classified the E. hormaechei subsp. hoffmannii isolate to ST78, the E. coli isolate to ST354, and the two C. freundii isolates to ST95. These isolates harboured various antimicrobial resistance genes aside from blaKHM-1 on their chromosomes and plasmids. In all four isolates, blaKHM-1 was located on 137 kbp to 213 kbp plasmids of IncC replicon type. Although there were common resistance genes such as blaKHM-1-ISEc68, class I integron cassette, and fosG, the four blaKHM-1-encoding plasmids were distinguishable into two lineages based on differences of the resistance gene components and their surrounding regions. CONCLUSION Because no epidemiological contact was observed among the inpatients, the blaKHM-1-encoding IncC plasmids might have spread horizontally to multiple bacterial species through repeated recombination and insertion.
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Affiliation(s)
- Kaoru Umeda
- Division of Microbiology, Bacteriology Section, Osaka Institute of Public Health, Nakamichi, Osaka, Japan.
| | - Masaki Anraku
- Division of Microbiology, Bacteriology Section, Osaka Institute of Public Health, Nakamichi, Osaka, Japan
| | - Takahiro Yamaguchi
- Division of Microbiology, Bacteriology Section, Osaka Institute of Public Health, Nakamichi, Osaka, Japan
| | - Hiromi Nakamura
- Division of Microbiology, Bacteriology Section, Osaka Institute of Public Health, Nakamichi, Osaka, Japan
| | - Ryuji Kawahara
- Division of Microbiology, Bacteriology Section, Osaka Institute of Public Health, Nakamichi, Osaka, Japan
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18
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Akcakavak G, Kazak F, Karatas O, Alakus H, Alakus I, Kirgiz O, Celik Z, Yilmaz Deveci MZ, Ozdemir O, Tuzcu M. Eucalyptol regulates Nrf2 and NF-kB signaling and alleviates gentamicin-induced kidney injury in rats by downregulating oxidative stress, oxidative DNA damage, inflammation, and apoptosis. Toxicol Mech Methods 2024; 34:413-422. [PMID: 38115227 DOI: 10.1080/15376516.2023.2297234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/13/2023] [Indexed: 12/21/2023]
Abstract
Gentamicin, an aminoglycoside antibiotic, is nowadays widely used in the treatment of gram-negative microorganisms. The antimicrobial, anti-inflammatory, and antioxidant activities of eucalyptol, a type of saturated monoterpene, have been reported in many studies. The aim of this study was to examine the possible effects of eucalyptol on gentamicin-induced renal toxicity. A total of 32 rats were divided into 4 groups; Control (C), Eucalyptol (EUC), Gentamicin (GEN), and Gentamicin + Eucalyptol (GEN + EUC). In order to induce renal toxicity, 100 mg/kg gentamicin was administered intraperitoneally (i.p.) for 10 consecutive days in the GEN and GEN + EUC groups. EUC and GEN + EUC groups were given 100 mg/kg orally of eucalyptol for 10 consecutive days. Afterwards, rats were euthanized and samples were taken and subjected to histopathological, biochemical, immunohistochemical, and real-time PCR examinations. The blood urea nitrogen (BUN) and creatinine (CRE) levels were significantly decreased in the GEN + EUC group (0.76 and 0.69-fold, respectively) compared to the GEN group. The glutathione peroxidase (GPx) and catalase (CAT) activities were significantly increased in the GEN + EUC group (1.35 and 2.67-fold, respectively) compared to the GEN group. In GEN group, Nuclear factor kappa B (NF-kB), Interleukin 1-beta (IL-1β), Inducible nitric oxide synthase (iNOS), Tumor necrosis factor-α (TNF-α), Caspase-3, 8-Hydroxy-2'-deoxyguanosine (8-OHdG) and Nuclear factor erythroid 2-related factor (Nrf2) expression levels were found to be quite irregular. GEN + EUC group decreased the expressions of NF-kB, IL-1β, iNOS, TNF-α, Caspase-3, and 8-OHdG (0.55, 0.67, 0.54, 0.54, 0.63 and 0.67-fold, respectively), while it caused increased expression of Nrf2 (3.1 fold). In addition, eucalyptol treatment ameliorated the histopathological changes that occurred with gentamicin. The results of our study show that eucalyptol has anti-inflammatory, antioxidative, antiapoptotic, nephroprotective, and curative effects on gentamicin-induced nephrotoxicity.
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Affiliation(s)
- Gokhan Akcakavak
- Department of Pathology, Yozgat Bozok University, Yozgat, Turkey
| | - Filiz Kazak
- Department of Biochemistry, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Ozhan Karatas
- Department of Pathology, Cumhuriyet University, Sivas, Turkey
| | - Halil Alakus
- Department of Surgery Hatay Mustafa Kemal University, Hatay, Turkey
| | - Ibrahim Alakus
- Department of Surgery Hatay Mustafa Kemal University, Hatay, Turkey
| | - Omer Kirgiz
- Department of Surgery Hatay Mustafa Kemal University, Hatay, Turkey
| | - Zeynep Celik
- Department of Pathology, Selcuk University, Konya, Turkey
| | | | - Ozgur Ozdemir
- Department of Pathology, Selcuk University, Konya, Turkey
| | - Mehmet Tuzcu
- Department of Pathology, Selcuk University, Konya, Turkey
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19
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Nasrollahian S, Graham JP, Halaji M. A review of the mechanisms that confer antibiotic resistance in pathotypes of E. coli. Front Cell Infect Microbiol 2024; 14:1387497. [PMID: 38638826 PMCID: PMC11024256 DOI: 10.3389/fcimb.2024.1387497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 03/15/2024] [Indexed: 04/20/2024] Open
Abstract
The dissemination of antibiotic resistance in Escherichia coli poses a significant threat to public health worldwide. This review provides a comprehensive update on the diverse mechanisms employed by E. coli in developing resistance to antibiotics. We primarily focus on pathotypes of E. coli (e.g., uropathogenic E. coli) and investigate the genetic determinants and molecular pathways that confer resistance, shedding light on both well-characterized and recently discovered mechanisms. The most prevalent mechanism continues to be the acquisition of resistance genes through horizontal gene transfer, facilitated by mobile genetic elements such as plasmids and transposons. We discuss the role of extended-spectrum β-lactamases (ESBLs) and carbapenemases in conferring resistance to β-lactam antibiotics, which remain vital in clinical practice. The review covers the key resistant mechanisms, including: 1) Efflux pumps and porin mutations that mediate resistance to a broad spectrum of antibiotics, including fluoroquinolones and aminoglycosides; 2) adaptive strategies employed by E. coli, including biofilm formation, persister cell formation, and the activation of stress response systems, to withstand antibiotic pressure; and 3) the role of regulatory systems in coordinating resistance mechanisms, providing insights into potential targets for therapeutic interventions. Understanding the intricate network of antibiotic resistance mechanisms in E. coli is crucial for the development of effective strategies to combat this growing public health crisis. By clarifying these mechanisms, we aim to pave the way for the design of innovative therapeutic approaches and the implementation of prudent antibiotic stewardship practices to preserve the efficacy of current antibiotics and ensure a sustainable future for healthcare.
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Affiliation(s)
- Sina Nasrollahian
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Jay P. Graham
- Environmental Health Sciences Division, School of Public Health, University of California, Berkeley, CA, United States
| | - Mehrdad Halaji
- Infectious Diseases and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
- Department of Medical Microbiology and Biotechnology, School of Medicine, Babol University of Medical Sciences, Babol, Iran
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20
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Ramirez DM, Dhiman S, Mukherjee A, Wimalasekara R, Schweizer F. Application of tobramycin benzyl ether as an antibiotic adjuvant capable of sensitizing multidrug-resistant Gram-negative bacteria to rifampicin. RSC Med Chem 2024; 15:1055-1065. [PMID: 38516601 PMCID: PMC10953491 DOI: 10.1039/d3md00602f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/13/2024] [Indexed: 03/23/2024] Open
Abstract
The emergence of aminoglycoside resistance has prompted the development of amphiphilic aminoglycoside derivatives which target bacterial membranes. Tobramycin and nebramine ether derivatives initially designed for this purpose were optimized and screened for their potential application as outer membrane (OM) permeabilizing adjuvants. Structure-activity relationship (SAR) studies revealed that the tobramycin benzyl ether was the most optimal OM permeabilizer, capable of potentiating rifampicin, novobiocin, vancomycin, minocycline, and doxycycline against Gram-negative bacteria. The innovative use of this compound as an adjuvant is highlighted by its ability to sensitize multidrug-resistant (MDR) Gram-negative bacteria to rifampicin and restore the susceptibility of MDR Escherichia coli to minocycline.
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Affiliation(s)
| | - Shiv Dhiman
- Department of Chemistry, University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Ayan Mukherjee
- Department of Chemistry, University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Ruwani Wimalasekara
- Department of Microbiology, University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Frank Schweizer
- Department of Chemistry, University of Manitoba Winnipeg MB R3T 2N2 Canada
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21
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Kasdekar N, Spieker MR, Crich D. Practical Synthesis from Streptomycin and Regioselective Partial Deprotections of (-)-(1 R,2 S,3 R,4 R,5 S,6 S)-1,3-Di(deamino)-1,3-diazido-2,5,6-tri- O-benzylstreptamine. J Org Chem 2024; 89:4225-4231. [PMID: 38427951 PMCID: PMC10949228 DOI: 10.1021/acs.joc.3c02922] [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: 12/20/2023] [Revised: 02/09/2024] [Accepted: 02/19/2024] [Indexed: 03/03/2024]
Abstract
We describe the gram-scale synthesis of (-)-(1R,2S,3R,4R,5S,6S)-1,3-di(diamino)-1,3-diazido-2,5,6-tri-O-benzylstreptamine from streptomycin by (i) hydrolysis of the two streptomycin guanidine residues, (ii) reprotection of the amines as azides, (iii) protection of all alcohols as benzyl ethers, and (iv) glycosidic bond cleavage with HCl in methanol. Protocols for regioselective monodebenzylation and regioselective reduction of a single azide in the product are also described, providing four optically pure building blocks for exploitation in novel aminoglycoside synthesis.
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Affiliation(s)
- Niteshlal Kasdekar
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
| | - Michael R. Spieker
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Department
of Biochemistry and Molecular Biology, University
of Georgia, 120 East Green Street, Athens, Georgia 30602, United States
| | - David Crich
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Department
of Chemistry, University of Georgia, 302 East Campus Road, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
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22
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Samia ALKHALILS. EFFECT OF PENICILLIUM SPECIES ON THE ANTIBIOTIC RESISTANCE PROFILE OF ALCALIGENES FAECALIS. Afr J Infect Dis 2024; 18:8-18. [PMID: 38606189 PMCID: PMC11004782 DOI: 10.21010/ajidv18i2.2] [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: 08/30/2023] [Revised: 01/22/2024] [Accepted: 01/22/2024] [Indexed: 04/13/2024] Open
Abstract
Background Infectious diseases due to antibiotic resistant pathogens are a global public health problem. This study aimed at determining the potential effect of bacterial-fungal interaction on the antibiotic susceptibility profile of Alcaligenes faecalis. Materials and Methods Alcaligenes faecalis was isolated from water samples. The isolate was identified using the conventional biochemical tests and the 16S rRNA molecular sequencing technique. Additionally, Penicillium species was isolated and identified based on colony morphological characteristics and microscopic features. Standardized isolates were co-cultured in broth medium. Antibiotic susceptibility evaluation of the Alcaligenes faecalis from the co-culture and the original Alcaligenes faecalis was carried out using the Kirby bauer disk diffusion method. Results The antibiotic susceptibility profile of Alcaligenes faecalis before and after co-culture remained largely unchanged except in the case of chloramphenicol, where the isolate showed reduced susceptibility. Molecular analysis of resistance gene revealed the absence of tested gene encoding antibiotic resistance, including the streptomycin resistance (str) genes (stra and strb) and the erythromycin resistance methylase (erm) gene. Conclusion The result of this study showed that there is a minimal influence of Penicillium cultures on the susceptibility of A. faecalis. Further research involving a wide spectrum of microorganisms and their interactions should be conducted to acquire a thorough understanding of the influence of microbial interactions on antibiotic susceptibility profiles in order to pave way for novel strategies to combat antimicrobial resistance.
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Affiliation(s)
- ALKHALIL S. Samia
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Shaqra University, Alquwayiyah, Riyadh, Saudi Arabia
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23
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Ferrando N, Pino-Otín MR, Ballestero D, Lorca G, Terrado EM, Langa E. Enhancing Commercial Antibiotics with Trans-Cinnamaldehyde in Gram-Positive and Gram-Negative Bacteria: An In Vitro Approach. PLANTS (BASEL, SWITZERLAND) 2024; 13:192. [PMID: 38256746 PMCID: PMC10820649 DOI: 10.3390/plants13020192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/21/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024]
Abstract
One strategy to mitigate the emergence of bacterial resistance involves reducing antibiotic doses by combining them with natural products, such as trans-cinnamaldehyde (CIN). The objective of this research was to identify in vitro combinations (CIN + commercial antibiotic (ABX)) that decrease the minimum inhibitory concentration (MIC) of seven antibiotics against 14 different Gram-positive and Gram-negative pathogenic bacteria, most of them classified as ESKAPE. MIC values were measured for all compounds using the broth microdilution method. The effect of the combinations on these microorganisms was analyzed through the checkboard assay to determine the type of activity (synergy, antagonism, or addition). This analysis was complemented with a kinetic study of the synergistic combinations. Fifteen synergistic combinations were characterized for nine of the tested bacteria. CIN demonstrated effectiveness in reducing the MIC of chloramphenicol, streptomycin, amoxicillin, and erythromycin (94-98%) when tested on Serratia marcescens, Staphylococcus aureus, Pasteurella aerogenes, and Salmonella enterica, respectively. The kinetic study revealed that when the substances were tested alone at the MIC concentration observed in the synergistic combination, bacterial growth was not inhibited. However, when CIN and the ABX, for which synergy was observed, were tested simultaneously in combination at these same concentrations, the bacterial growth inhibition was complete. This demonstrates the highly potent in vitro synergistic activity of CIN when combined with commercial ABXs. This finding could be particularly beneficial in livestock farming, as this sector witnesses the highest quantities of antimicrobial usage, contributing significantly to antimicrobial resistance issues. Further research focused on this natural compound is thus warranted for this reason.
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Affiliation(s)
- Natalia Ferrando
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario Villanueva de Gállego, Autovía A-23 Zaragoza-Huesca, km. 510, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.); (G.L.)
| | - María Rosa Pino-Otín
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario Villanueva de Gállego, Autovía A-23 Zaragoza-Huesca, km. 510, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.); (G.L.)
| | - Diego Ballestero
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario Villanueva de Gállego, Autovía A-23 Zaragoza-Huesca, km. 510, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.); (G.L.)
| | - Guillermo Lorca
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario Villanueva de Gállego, Autovía A-23 Zaragoza-Huesca, km. 510, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.); (G.L.)
| | - Eva María Terrado
- Departamento de Didácticas Específicas, Facultad de Educación, Universisad de Zaragoza, Calle Pedro Cerbuna 12, 50009 Zaragoza, Spain;
| | - Elisa Langa
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario Villanueva de Gállego, Autovía A-23 Zaragoza-Huesca, km. 510, 50830 Villanueva de Gállego, Spain; (N.F.); (M.R.P.-O.); (D.B.); (G.L.)
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24
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Jangid H, Kumar D, Kumar G, Kumar R, Mamidi N. An Emerging Foodborne Pathogen Spotlight: A Bibliometric Analysis and Scholarly Review of Escherichia coli O157 Research. Antibiotics (Basel) 2024; 13:60. [PMID: 38247619 PMCID: PMC10812834 DOI: 10.3390/antibiotics13010060] [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: 12/06/2023] [Revised: 12/25/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024] Open
Abstract
Foodborne infections pose a substantial global threat, causing an estimated 600 million illnesses and resulting in approximately 420,000 deaths annually. Among the diverse array of pathogens implicated in these infections, Escherichia coli (E. coli), specifically the O157 strain (E. coli O157), emerges as a prominent pathogen associated with severe outbreaks. This study employs a comprehensive bibliometric analysis and scholarly review focused on E. coli O157 research. The bibliometric analysis highlights the significant role played by the United States in the E. coli O157 research domain. Further exploration underscores the noteworthy contributions of the researcher Doyle MP, whose body of work, consisting of 84 documents and an impressive H-Index of 49, reflects their substantial impact in the field. Recent research trends indicate a discernible shift towards innovative detection methods, exemplified by the adoption of CRISPR-CAS and Loop-Mediated Isothermal Amplification. Moreover, high-throughput whole-genome sequencing techniques are gaining prominence for the expeditious analysis of pathogenic E. coli strains. Scientists are increasingly exploring antimicrobial agents, including phage therapy, to address the challenges posed by antibiotic-resistant E. coli strains, thereby addressing critical concerns related to multi-drug resistance. This comprehensive analysis provides vital insights into the dynamic landscape of E. coli O157 research. It serves as a valuable resource for researchers, policymakers, and healthcare professionals dedicated to mitigating E. coli O157 outbreaks and advancing global public health strategies.
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Affiliation(s)
- Himanshu Jangid
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara 144411, Punjab, India;
| | - Deepak Kumar
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India;
| | - Gaurav Kumar
- Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara 144411, Punjab, India;
| | - Raj Kumar
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68105, USA
| | - Narsimha Mamidi
- Wisconsin Center for NanoBioSystems, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
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25
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Aleksandrowicz A, Kolenda R, Baraniewicz K, Thurston TLM, Suchański J, Grzymajlo K. Membrane properties modulation by SanA: implications for xenobiotic resistance in Salmonella Typhimurium. Front Microbiol 2024; 14:1340143. [PMID: 38249450 PMCID: PMC10797042 DOI: 10.3389/fmicb.2023.1340143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 12/11/2023] [Indexed: 01/23/2024] Open
Abstract
Introduction Multidrug resistance in bacteria is a pressing concern, particularly among clinical isolates. Gram-negative bacteria like Salmonella employ various strategies, such as altering membrane properties, to resist treatment. Their two-membrane structure affects susceptibility to antibiotics, whereas specific proteins and the peptidoglycan layer maintain envelope integrity. Disruptions can compromise stability and resistance profile toward xenobiotics. In this study, we investigated the unexplored protein SanA's role in modifying bacterial membranes, impacting antibiotic resistance, and intracellular replication within host cells. Methods We generated a sanA deletion mutant and complemented it in trans to assess its biological function. High-throughput phenotypic profiling with Biolog Phenotype microarrays was conducted using 240 xenobiotics. Membrane properties and permeability were analyzed via cytochrome c binding, hexadecane adhesion, nile red, and ethidium bromide uptake assays, respectively. For intracellular replication analysis, primary bone marrow macrophages served as a host cells model. Results Our findings demonstrated that the absence of sanA increased membrane permeability, hydrophilicity, and positive charge, resulting in enhanced resistance to certain antibiotics that target peptidoglycan synthesis. Furthermore, the sanA deletion mutant demonstrated enhanced replication rates within primary macrophages, highlighting its ability to evade the bactericidal effects of the immune system. Taking together, we provide valuable insights into a poorly known SanA protein, highlighting the complex interplay among bacterial genetics, membrane physiology, and antibiotic resistance, underscoring its significance in understanding Salmonella pathogenicity.
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Affiliation(s)
- Adrianna Aleksandrowicz
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Rafał Kolenda
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Karolina Baraniewicz
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Teresa L. M. Thurston
- Department of Infectious Disease, Centre for Bacterial Resistance Biology, Imperial College London, London, United Kingdom
| | - Jarosław Suchański
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Krzysztof Grzymajlo
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
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26
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Chukamnerd A, Saipetch N, Singkhamanan K, Ingviya N, Assanangkornchai N, Surachat K, Chusri S. Association of biofilm formation, antimicrobial resistance, clinical characteristics, and clinical outcomes among Acinetobacter baumannii isolates from patients with ventilator-associated pneumonia. THE CLINICAL RESPIRATORY JOURNAL 2024; 18:e13732. [PMID: 38286744 PMCID: PMC10784708 DOI: 10.1111/crj.13732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 09/05/2023] [Accepted: 12/27/2023] [Indexed: 01/31/2024]
Abstract
INTRODUCTION Biofilm formation is an important virulence factor of Acinetobacter baumannii. Here, we examined the biofilm formation of archived A. baumannii causing ventilator-associated pneumonia (VAP). METHODS Eighteen and twenty isolates of A. baumannii causing bacteremic pneumonia and non-bacteremic pneumonia were included, respectively. Antimicrobial susceptibility testing was performed by broth microdilution method, while biofilm formation was evaluated by microtiter dish biofilm formation assay. RESULTS All 38 isolates were still susceptible to colistin and tigecycline, whereas almost all isolates were non-susceptible (intermediate to resistant) to several antimicrobial agents, especially ceftriaxone and cefotaxime. Approximately, 44% of bacteremic isolates and 50% of non-bacteremic isolates were classified as carbapenem-resistant A. baumannii (CRAB). Biofilm formation was detected in 42% of the studied isolates. Bacteremia among the patients infected with biofilm-producing isolates was significantly higher than in those infected with non-biofilm-producing isolates. The antimicrobial susceptibilities of A. baumannii with biofilm formation were lower than those without biofilm formation, but the differences did not have statistical significance. The patients infected with non-biofilm-producing isolates had good clinical and non-clinical outcomes than those infected with biofilm-producing isolates. The survival rate of patients diagnosed with VAP due to biofilm-producing A. baumannii was lower than in those patients diagnosed with VAP due to non-biofilm-producing isolates. CONCLUSION Biofilm formation of A. baumannii causing VAP was associated with antimicrobial resistance and bacteremia as well as unfavorable clinical outcomes.
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Affiliation(s)
- Arnon Chukamnerd
- Division of Infectious Diseases, Department of Internal Medicine, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
| | - Niwat Saipetch
- Division of Infectious Diseases, Department of Internal Medicine, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
| | - Kamonnut Singkhamanan
- Department of Biomedical Sciences and Biomedical Engineering, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
| | - Natnicha Ingviya
- Department of Pathology, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
| | - Nawaporn Assanangkornchai
- Division of Infectious Diseases, Department of Internal Medicine, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
| | - Komwit Surachat
- Department of Biomedical Sciences and Biomedical Engineering, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
- Translational Medicine Research Center, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
| | - Sarunyou Chusri
- Division of Infectious Diseases, Department of Internal Medicine, Faculty of MedicinePrince of Songkla UniversityHat YaiThailand
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27
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Moon BY, Ali MS, Choi JH, Heo YE, Lee YH, Kang HS, Kim TS, Yoon SS, Moon DC, Lim SK. Antimicrobial Resistance Profiles of Enterococcus faecium and Enterococcus faecalis Isolated from Healthy Dogs and Cats in South Korea. Microorganisms 2023; 11:2991. [PMID: 38138136 PMCID: PMC10745814 DOI: 10.3390/microorganisms11122991] [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: 11/24/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
Enterococcus spp. are typically found in the gastrointestinal tracts of humans and animals. However, they have the potential to produce opportunistic infections that can be transmitted to humans or other animals, along with acquired antibiotic resistance. In this study, we aimed to investigate the antimicrobial resistance profiles of Enterococcus faecium and Enterococcus faecalis isolates obtained from companion animal dogs and cats in Korea during 2020-2022. The resistance rates in E. faecalis towards most of the tested antimicrobials were relatively higher than those in E. faecium isolated from dogs and cats. We found relatively higher resistance rates to tetracycline (65.2% vs. 75.2%) and erythromycin (39.5% vs. 49.6%) in E. faecalis isolated from cats compared to those from dogs. However, in E. faecium, the resistance rates towards tetracycline (35.6% vs. 31.5%) and erythromycin (40.3% vs. 35.2%) were comparatively higher for dog isolates than cats. No or very few E. faecium and E. faecalis isolates were found to be resistant to daptomycin, florfenicol, tigecycline, and quinupristin/dalfopristin. Multidrug resistance (MDR) was higher in E. faecalis recovered from cats (44%) and dogs (33.9%) than in E. faecium isolated from cats (24.1%) and dogs (20.5%). Moreover, MDR patterns in E. faecalis isolates from dogs (27.2%) and cats (35.2%) were shown to encompass five or more antimicrobials. However, E. faecium isolates from dogs (at 13.4%) and cats (at 14.8%) were resistant to five or more antimicrobials. Taken together, the prevalence of antimicrobial-resistant enterococci in companion animals presents a potential public health concern.
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Affiliation(s)
- Bo-Youn Moon
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Md. Sekendar Ali
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Ji-Hyun Choi
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Ye-Eun Heo
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Yeon-Hee Lee
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Hee-Seung Kang
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Tae-Sun Kim
- Public Health and Environment Institute of Gwangju, Gwangju 14502, Republic of Korea;
| | - Soon-Seek Yoon
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
| | - Dong-Chan Moon
- Division of Antimicrobial Resistance Research, Centre for Infectious Diseases Research, Korea Disease Control and Prevention Agency, Cheongju 28159, Republic of Korea
| | - Suk-Kyung Lim
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea; (B.-Y.M.); (M.S.A.); (J.-H.C.); (Y.-E.H.); (Y.-H.L.); (H.-S.K.); (S.-S.Y.)
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Visonà G, Duroux D, Miranda L, Sükei E, Li Y, Borgwardt K, Oliver C. Multimodal learning in clinical proteomics: enhancing antimicrobial resistance prediction models with chemical information. Bioinformatics 2023; 39:btad717. [PMID: 38001023 PMCID: PMC10724849 DOI: 10.1093/bioinformatics/btad717] [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: 06/14/2023] [Revised: 11/08/2023] [Accepted: 11/23/2023] [Indexed: 11/26/2023] Open
Abstract
MOTIVATION Large-scale clinical proteomics datasets of infectious pathogens, combined with antimicrobial resistance outcomes, have recently opened the door for machine learning models which aim to improve clinical treatment by predicting resistance early. However, existing prediction frameworks typically train a separate model for each antimicrobial and species in order to predict a pathogen's resistance outcome, resulting in missed opportunities for chemical knowledge transfer and generalizability. RESULTS We demonstrate the effectiveness of multimodal learning over proteomic and chemical features by exploring two clinically relevant tasks for our proposed deep learning models: drug recommendation and generalized resistance prediction. By adopting this multi-view representation of the pathogenic samples and leveraging the scale of the available datasets, our models outperformed the previous single-drug and single-species predictive models by statistically significant margins. We extensively validated the multi-drug setting, highlighting the challenges in generalizing beyond the training data distribution, and quantitatively demonstrate how suitable representations of antimicrobial drugs constitute a crucial tool in the development of clinically relevant predictive models. AVAILABILITY AND IMPLEMENTATION The code used to produce the results presented in this article is available at https://github.com/BorgwardtLab/MultimodalAMR.
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Affiliation(s)
- Giovanni Visonà
- Department of Empirical Inference, Max Planck Institute for Intelligent Systems, Max-Planck-Ring 4, Tübingen 72076, Germany
| | - Diane Duroux
- BIO3—GIGA-R Medical Genomics, University of Liège, Avenue de l’Hôpital 11, Liège 4000, Belgium
- ETH AI Center, ETH Zürich, Andreasstrasse 5, Zürich 8092, Switzerland
| | - Lucas Miranda
- Research Group Statistical Genetics, Max Planck Institute of Psychiatry, Kraepelinstraße 10, München 80804, Germany
| | - Emese Sükei
- Department of Signal Theory and Communications, Universidad Carlos III de Madrid, Leganés 28911, Spain
| | - Yiran Li
- Department of Biosystems Science and Engineering, ETH Zürich, Basel 4058, Switzerland
| | - Karsten Borgwardt
- Department of Biosystems Science and Engineering, ETH Zürich, Basel 4058, Switzerland
- Swiss Institute for Bioinformatics (SIB), Amphipôle, Quartier UNIL-Sorge, Lausanne 1015, Switzerland
- Department of Machine Learning and Systems Biology, Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Carlos Oliver
- Department of Biosystems Science and Engineering, ETH Zürich, Basel 4058, Switzerland
- Swiss Institute for Bioinformatics (SIB), Amphipôle, Quartier UNIL-Sorge, Lausanne 1015, Switzerland
- Department of Machine Learning and Systems Biology, Max Planck Institute of Biochemistry, Martinsried 82152, Germany
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Denissen J, Reyneke B, Barnard T, Khan S, Khan W. Risk assessment of Enterococcus faecium, Klebsiella pneumoniae, and Pseudomonas aeruginosa in environmental water sources: Development of surrogate models for antibiotic resistance genes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:166217. [PMID: 37604372 DOI: 10.1016/j.scitotenv.2023.166217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 08/08/2023] [Accepted: 08/08/2023] [Indexed: 08/23/2023]
Abstract
The presence of Enterococcus faecium (E. faecium), Klebsiella pneumoniae (K. pneumoniae), Pseudomonas aeruginosa (P. aeruginosa), and the aminoglycoside resistance genes, aac(6')-Ib and aac(6')-aph(2″), was investigated in environmental water sources obtained from informal settlements in the Western Cape (South Africa). Using ethidium monoazide bromide quantitative polymerase chain reaction (EMA-qPCR) analysis, E. faecium, K. pneumoniae, and P. aeruginosa were detected in 88.9 %, 100 %, and 93.3 % of the samples (n = 45), respectively, with a significantly higher mean concentration recorded for K. pneumoniae (7.83 × 104 cells/100 mL) over the sampling period. The aac(6')-Ib gene was detected in 95.6 % (43/45) of the environmental water samples [mean concentration of 7.07 × 106 gene copies (GC)/100 mL], while the aac(6')-aph(2″) gene was detected in 100 % (n = 45) of the samples [mean concentration of 6.68 × 105 GC/100 mL]. Quantitative microbial risk assessment (QMRA) subsequently indicated that the risks posed by K. pneumoniae and P. aeruginosa were linked to intentional drinking, washing/bathing, cleaning of the home, and swimming, in the samples collected from the various sampling sites. Surrogate risk assessment models were then designed and applied for Gram-positive [aac(6')-aph(2″) gene] and Gram-negative [aac(6')-Ib gene] pathogens that may exhibit aminoglycoside resistance. The results indicated that only the Gram-negative pathogens posed a risk (>10-4) in all the samples for cleaning of the home and intentional drinking, as well as for washing laundry by hand, garden hosing, garden work, washing/bathing, accidental consumption, and swimming at the stream and marsh sites. Thus, while environmental waters may pose a health risk of exposure to pathogenic bacteria, the results obtained indicate that screening for antibiotic resistant genes, associated with multiple genera/species, could serve as a surrogate model for estimating risks with the target group under investigation.
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Affiliation(s)
- Julia Denissen
- Department of Microbiology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
| | - Brandon Reyneke
- Department of Microbiology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
| | - Tobias Barnard
- Water and Health Research Centre, Faculty of Health Sciences, University of Johannesburg, PO Box 17011, Doornfontein 7305, South Africa
| | - Sehaam Khan
- Water and Health Research Centre, Faculty of Health Sciences, University of Johannesburg, PO Box 17011, Doornfontein 7305, South Africa
| | - Wesaal Khan
- Department of Microbiology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa.
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Gauba A, Rahman KM. Evaluation of Antibiotic Resistance Mechanisms in Gram-Negative Bacteria. Antibiotics (Basel) 2023; 12:1590. [PMID: 37998792 PMCID: PMC10668847 DOI: 10.3390/antibiotics12111590] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/25/2023] Open
Abstract
Multidrug-resistant Gram-negative bacterial infections are exponentially increasing, posing one of the most urgent global healthcare and economic threats. Due to the lack of new therapies, the World Health Organization classified these bacterial species as priority pathogens in 2017, known as ESKAPE pathogens. This classification emphasizes the need for urgent research and development of novel targeted therapies. The majority of these priority pathogens are Gram-negative species, which possess a structurally dynamic cell envelope enabling them to resist multiple antibiotics, thereby leading to increased mortality rates. Despite 6 years having passed since the WHO classification, the progress in generating new treatment ideas has not been sufficient, and antimicrobial resistance continues to escalate, acting as a global ticking time bomb. Numerous efforts and strategies have been employed to combat the rising levels of antibiotic resistance by targeting specific resistance mechanisms. These mechanisms include antibiotic inactivating/modifying enzymes, outer membrane porin remodelling, enhanced efflux pump action, and alteration of antibiotic target sites. Some strategies have demonstrated clinical promise, such as the utilization of beta-lactamase inhibitors as antibiotic adjuvants, as well as recent advancements in machine-based learning employing artificial intelligence to facilitate the production of novel narrow-spectrum antibiotics. However, further research into an enhanced understanding of the precise mechanisms by which antibiotic resistance occurs, specifically tailored to each bacterial species, could pave the way for exploring narrow-spectrum targeted therapies. This review aims to introduce the key features of Gram-negative bacteria and their current treatment approaches, summarizing the major antibiotic resistance mechanisms with a focus on Escherichia coli, Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Additionally, potential directions for alternative therapies will be discussed, along with their relative modes of action, providing a future perspective and insight into the discipline of antimicrobial resistance.
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Affiliation(s)
| | - Khondaker Miraz Rahman
- Institute of Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, UK;
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Subramani P, Menichincheri G, Pirolo M, Arcari G, Kudirkiene E, Polani R, Carattoli A, Damborg P, Guardabassi L. Genetic background of neomycin resistance in clinical Escherichia coli isolated from Danish pig farms. Appl Environ Microbiol 2023; 89:e0055923. [PMID: 37787538 PMCID: PMC10617424 DOI: 10.1128/aem.00559-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/28/2023] [Indexed: 10/04/2023] Open
Abstract
Neomycin is the first-choice antibiotic for the treatment of porcine enteritis caused by enterotoxigenic Escherichia coli. Resistance to this aminoglycoside is on the rise after the increased use of neomycin due to the ban on zinc oxide. We identified the neomycin resistance determinants and plasmid contents in a historical collection of 128 neomycin-resistant clinical E. coli isolates from Danish pig farms. All isolates were characterized by whole-genome sequencing and antimicrobial susceptibility testing, followed by conjugation experiments and long-read sequencing of eight selected representative strains. We detected 35 sequence types (STs) with ST100 being the most prevalent lineage (38.3%). Neomycin resistance was associated with two resistance genes, namely aph(3')-Ia and aph(3')-Ib, which were identified in 93% and 7% of the isolates, respectively. The aph(3')-Ia was found on different large conjugative plasmids belonging to IncI1α, which was present in 67.2% of the strains, on IncHI1, IncHI2, and IncN, as well as on a multicopy ColRNAI plasmid. All these plasmids except ColRNAI carried genes encoding resistance to other antimicrobials or heavy metals, highlighting the risk of co-selection. The aph(3')-Ib gene occurred on a 19 kb chimeric, mobilizable plasmid that contained elements tracing back its origin to distantly related genera. While aph(3')-Ia was flanked by either Tn903 or Tn4352 derivatives, no clear association was observed between aph(3')-Ib and mobile genetic elements. In conclusion, the spread of neomycin resistance in porcine clinical E. coli is driven by two resistance determinants located on distinct plasmid scaffolds circulating within a highly diverse population dominated by ST100. IMPORTANCE Neomycin is the first-choice antibiotic for the management of Escherichia coli enteritis in pigs. This work shows that aph(3')-Ia and to a lesser extent aph(3')-Ib are responsible for the spread of neomycin resistance that has been recently observed among pig clinical isolates and elucidates the mechanisms of dissemination of these two resistance determinants. The aph(3')-Ia gene is located on different conjugative plasmid scaffolds and is associated with two distinct transposable elements (Tn903 and Tn4352) that contributed to its spread. The diffusion of aph(3')-Ib is mediated by a small non-conjugative, mobilizable chimeric plasmid that likely derived from distantly related members of the Pseudomonadota phylum and was not associated with any detectable mobile genetic element. Although the spread of neomycin resistance is largely attributable to horizontal transfer, both resistance determinants have been acquired by a predominant lineage (ST100) associated with enterotoxigenic E. coli, which accounted for approximately one-third of the strains.
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Affiliation(s)
- Prabha Subramani
- Department of Veterinary and Animal Sciences, Section for Veterinary Clinical Microbiology, University of Copenhagen, Frederiksberg C, Denmark
- Department of Molecular Medicine Sapienza, University of Rome, Rome, Italy
| | - Gaia Menichincheri
- Department of Molecular Medicine Sapienza, University of Rome, Rome, Italy
| | - Mattia Pirolo
- Department of Veterinary and Animal Sciences, Section for Veterinary Clinical Microbiology, University of Copenhagen, Frederiksberg C, Denmark
| | - Gabriele Arcari
- Department of Molecular Medicine Sapienza, University of Rome, Rome, Italy
| | - Egle Kudirkiene
- Department of Veterinary and Animal Sciences, Section for Veterinary Clinical Microbiology, University of Copenhagen, Frederiksberg C, Denmark
| | - Riccardo Polani
- Department of Molecular Medicine Sapienza, University of Rome, Rome, Italy
| | | | - Peter Damborg
- Department of Veterinary and Animal Sciences, Section for Veterinary Clinical Microbiology, University of Copenhagen, Frederiksberg C, Denmark
| | - Luca Guardabassi
- Department of Veterinary and Animal Sciences, Section for Veterinary Clinical Microbiology, University of Copenhagen, Frederiksberg C, Denmark
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Falco A, Villaquirán-Muriel MÁ, Gallo Pérez JD, Mondragón-Quiguanas A, Aranaga C, Correa A. Identification of Vibrio metschnikovii and Vibrio injensis Isolated from Leachate Ponds: Characterization of Their Antibiotic Resistance and Virulence-Associated Genes. Antibiotics (Basel) 2023; 12:1571. [PMID: 37998773 PMCID: PMC10668802 DOI: 10.3390/antibiotics12111571] [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: 10/03/2023] [Revised: 10/22/2023] [Accepted: 10/25/2023] [Indexed: 11/25/2023] Open
Abstract
This study aimed to evaluate the antibiotic resistance of 22 environmental Vibrio metschnikovii isolates and 1 Vibrio injensis isolate from landfill leachates in southwestern Colombia. Isolates were identified by Matrix-Assisted Laser Desorption/Ionization-Time-Of-Flight (MALDI-TOF), and 16S ribosomal RNA gene sequencing. Analysis of the susceptibility to six antibacterial agents by the Kirby-Bauer method showed susceptibility of all the isolates to ciprofloxacin and imipenem. We recorded resistance to beta-lactams and aminoglycosides, but no multidrug resistance was observed. The genome of one of the isolates was sequenced to determine the pathogenic potential of V. injensis. Genes associated with virulence were identified, including for flagellar synthesis, biofilm formation, and hemolysins, among others. These results demonstrate that landfill leachates are potential reservoirs of antibiotic-resistant and pathogenic bacteria and highlight the importance of monitoring Vibrio species in different aquatic environments.
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Affiliation(s)
- Aura Falco
- Microbiology, Industry and Environment Research Group (GIMIA), Department of Basic Sciences, Santiago de Cali University, Cali 760035, Colombia (A.C.)
| | - Miguel Ángel Villaquirán-Muriel
- Microbiology, Industry and Environment Research Group (GIMIA), Department of Basic Sciences, Santiago de Cali University, Cali 760035, Colombia (A.C.)
| | - José David Gallo Pérez
- Microbiology, Industry and Environment Research Group (GIMIA), Department of Basic Sciences, Santiago de Cali University, Cali 760035, Colombia (A.C.)
| | - Alejandra Mondragón-Quiguanas
- Microbiology, Industry and Environment Research Group (GIMIA), Department of Basic Sciences, Santiago de Cali University, Cali 760035, Colombia (A.C.)
| | - Carlos Aranaga
- Chemistry and Biotechnology Research Group (QUIBIO), Department of Basic Sciences, Santiago de Cali University, Cali 760035, Colombia;
| | - Adriana Correa
- Microbiology, Industry and Environment Research Group (GIMIA), Department of Basic Sciences, Santiago de Cali University, Cali 760035, Colombia (A.C.)
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Sroor FM, Mahrous KF, El-Kader HAMA, Othman AM, Ibrahim NS. Impact of trifluoromethyl and sulfonyl groups on the biological activity of novel aryl-urea derivatives: synthesis, in-vitro, in-silico and SAR studies. Sci Rep 2023; 13:17560. [PMID: 37845243 PMCID: PMC10579241 DOI: 10.1038/s41598-023-44753-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 10/11/2023] [Indexed: 10/18/2023] Open
Abstract
We designed and prepared a novel series of urea derivatives with/without sulfonyl group in their structures to investigate the impact of the sulfonyl group on the biological activity of the evaluated compounds. Antibacterial investigations indicated that derivatives 7, 8, 9, and 11 had the most antibacterial property of all the compounds examined, their minimum inhibitory concentrations (MICs) determined against B. mycoides, E. coli, and C. albicans, with compound 8 being the most active at a MIC value of 4.88 µg/mL. Anti-cancer activity has been tested against eight human cancer cell lines; A549, HCT116, PC3, A431, HePG2, HOS, PACA2 and BJ1. Compounds 7, 8 and 9 emerged IC50 values better than Doxorubicin as a reference drug. Compounds 7 and 8 showed IC50 = 44.4 and 22.4 μM respectively against PACA2 compared to Doxorubicin (IC50 = 52.1 μM). Compound 9 showed IC50 = 17.8, 12.4, and 17.6 μM against HCT116, HePG2, and HOS, respectively. qRT-PCR revealed the down-regulation of PALB2 in compounds 7 and 15 treated PACA2 cells. Also, the down-regulation of BRCA1 and BRCA2 was shown in compound 7 treated PC3 cells. As regard A549 cells, compound 8 decreased the expression level of EGFR and KRAS genes. While compounds 7 and 9 down-regulated TP53 and FASN in HCT116 cells. Molecular docking was done against Escherichia coli enoyl reductase and human Son of sevenless homolog 1 (SOS1) and the results showed the promising inhibition of the studied proteins.
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Affiliation(s)
- Farid M Sroor
- Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, 12622, Egypt.
| | - Karima F Mahrous
- Cell Biology Department, National Research Centre, Dokki, 12622, Egypt
| | | | - Abdelmageed M Othman
- Microbial Chemistry Department, Biotechnology Research Institute, National Research Centre, Dokki, 12622, Egypt
| | - Nada S Ibrahim
- Department of Chemistry (Biochemistry Branch), Faculty of Science, Cairo University, Giza, Egypt
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K S, Vasanthrao R, Chattopadhyay I. Impact of environment on transmission of antibiotic-resistant superbugs in humans and strategies to lower dissemination of antibiotic resistance. Folia Microbiol (Praha) 2023; 68:657-675. [PMID: 37589876 DOI: 10.1007/s12223-023-01083-7] [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: 12/26/2022] [Accepted: 08/02/2023] [Indexed: 08/18/2023]
Abstract
Antibiotics are the most efficient type of therapy developed in the twentieth century. From the early 1960s to the present, the rate of discovery of new and therapeutically useful classes of antibiotics has significantly decreased. As a result of antibiotic use, novel strains emerge that limit the efficiency of therapies in patients, resulting in serious consequences such as morbidity or mortality, as well as clinical difficulties. Antibiotic resistance has created major concern and has a greater impact on global health. Horizontal and vertical gene transfers are two mechanisms involved in the spread of antibiotic resistance genes (ARGs) through environmental sources such as wastewater treatment plants, agriculture, soil, manure, and hospital-associated area discharges. Mobile genetic elements have an important part in microbe selection pressure and in spreading their genes into new microbial communities; additionally, it establishes a loop between the environment, animals, and humans. This review contains antibiotics and their resistance mechanisms, diffusion of ARGs, prevention of ARG transmission, tactics involved in microbiome identification, and therapies that aid to minimize infection, which are explored further below. The emergence of ARGs and antibiotic-resistant bacteria (ARB) is an unavoidable threat to global health. The discovery of novel antimicrobial agents derived from natural products shifts the focus from chemical modification of existing antibiotic chemical composition. In the future, metagenomic research could aid in the identification of antimicrobial resistance genes in the environment. Novel therapeutics may reduce infection and the transmission of ARGs.
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Affiliation(s)
- Suganya K
- Department of Biotechnology, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, 610101, India
| | - Ramavath Vasanthrao
- Department of Biotechnology, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, 610101, India
| | - Indranil Chattopadhyay
- Department of Biotechnology, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, 610101, India.
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Magaña AJ, Sklenicka J, Pinilla C, Giulianotti M, Chapagain P, Santos R, Ramirez MS, Tolmasky ME. Restoring susceptibility to aminoglycosides: identifying small molecule inhibitors of enzymatic inactivation. RSC Med Chem 2023; 14:1591-1602. [PMID: 37731693 PMCID: PMC10507813 DOI: 10.1039/d3md00226h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 07/21/2023] [Indexed: 09/22/2023] Open
Abstract
Growing resistance to antimicrobial medicines is a critical health problem that must be urgently addressed. Adding to the increasing number of patients that succumb to infections, there are other consequences to the rise in resistance like the compromise of several medical procedures and dental work that are heavily dependent on infection prevention. Since their introduction in the clinics, aminoglycoside antibiotics have been a critical component of the armamentarium to treat infections. Still, the increase in resistance and their side effects led to a decline in their utilization. However, numerous current factors, like the urgent need for antimicrobials and their favorable properties, led to renewed interest in these drugs. While efforts to design new classes of aminoglycosides refractory to resistance mechanisms and with fewer toxic effects are starting to yield new promising molecules, extending the useful life of those already in use is essential. For this, numerous research projects are underway to counter resistance from different angles, like inhibition of expression or activity of resistance components. This review focuses on selected examples of one aspect of this quest, the design or identification of small molecule inhibitors of resistance caused by enzymatic modification of the aminoglycoside. These compounds could be developed as aminoglycoside adjuvants to overcome resistant infections.
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Affiliation(s)
- Angel J Magaña
- Center for Applied Biotechnology Studies, Department of Biological Science, College of Natural Sciences and Mathematics, California State University Fullerton Fullerton CA 92831 USA
| | - Jan Sklenicka
- Center for Applied Biotechnology Studies, Department of Biological Science, College of Natural Sciences and Mathematics, California State University Fullerton Fullerton CA 92831 USA
| | - Clemencia Pinilla
- Center for Translational Science, Florida International University Port St. Lucie FL 34987 USA
| | - Marc Giulianotti
- Center for Translational Science, Florida International University Port St. Lucie FL 34987 USA
| | - Prem Chapagain
- Department of Physics, Florida International University Miami FL 33199 USA
- Biomolecular Sciences Institute, Florida International University Miami FL 33199 USA
| | - Radleigh Santos
- Department of Mathematics, Nova Southeastern University Fort Lauderdale FL 33314 USA
| | - Maria Soledad Ramirez
- Center for Applied Biotechnology Studies, Department of Biological Science, College of Natural Sciences and Mathematics, California State University Fullerton Fullerton CA 92831 USA
| | - Marcelo E Tolmasky
- Center for Applied Biotechnology Studies, Department of Biological Science, College of Natural Sciences and Mathematics, California State University Fullerton Fullerton CA 92831 USA
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Mentasti M, David S, Turton J, Morgan M, Turner L, Westlake J, Jenkins J, Williams C, Rey S, Watkins J, Daniel V, Mitchell S, Forbes G, Wootton M, Jones L. Clonal expansion and rapid characterization of Klebsiella pneumoniae ST1788, an otherwise uncommon strain spreading in Wales, UK. Microb Genom 2023; 9:001104. [PMID: 37668148 PMCID: PMC10569728 DOI: 10.1099/mgen.0.001104] [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: 05/20/2023] [Accepted: 08/19/2023] [Indexed: 09/06/2023] Open
Abstract
A multidrug-resistant strain of Klebsiella pneumoniae (Kp) sequence type (ST) 1788, an otherwise uncommon ST worldwide, was isolated from 65 patients at 11 hospitals and 11 general practices across South and West Wales, UK, between February 2019 and November 2021. A collection of 97 Kp ST1788 isolates (including 94 from Wales) was analysed to investigate the diversity and spread across Wales and to identify molecular marker(s) to aid development of a strain-specific real-time PCR. Whole genome sequencing (WGS) was performed with Illumina technology and the data were used to perform phylogenetic analyses. Pan-genome analysis of further Kp genome collections was used to identify an ST1788-specific gene target; a real-time PCR was then validated against a panel of 314 strains and 218 broth-enriched screening samples. Low genomic diversity was demonstrated amongst the 94 isolates from Wales. Evidence of spread within and across healthcare facilities was found. A yersiniabactin locus and the KL2 capsular locus were identified in 85/94 (90.4 %) and 94/94 (100 %) genomes respectively; bla SHV-232, bla TEM-1, bla CTX-M-15 and bla OXA-1 were simultaneously carried by 86/94 (91.5 %) isolates; 4/94 (4.3 %) isolates also carried bla OXA-48 carbapenemase. Aminoglycoside and fluoroquinolone resistance markers were found in 94/94 (100 %) and 86/94 (91.5 %) isolates respectively. The ST1788-specific real-time PCR was 100 % sensitive and specific. Our analyses demonstrated recent clonal expansion and spread of Kp ST1788 in the community and across healthcare facilities in South and West Wales with isolates carrying well-defined antimicrobial resistance and virulence markers. An ST1788-specific marker was also identified, enabling rapid and reliable preliminary characterization of isolates by real-time PCR. This study confirms the utility of WGS in investigating novel strains and in aiding proactive implementation of molecular tools to assist infection control specialists.
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Affiliation(s)
- Massimo Mentasti
- Specialist Antimicrobial Chemotherapy Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Sophia David
- Centre for Genomic Pathogen Surveillance, Big Data Institute, University of Oxford, Oxford, OX3 7LF, UK
| | - Jane Turton
- HCAI, Fungal, AMR, AMU & Sepsis Division, UK Health Security Agency, London, NW9 5HT, UK
| | - Mari Morgan
- Healthcare Associated Infection, Antimicrobial Resistance Prescribing Programme, Public Health Wales Health Protection, Cardiff, CF10 4BZ, UK
| | - Luke Turner
- Bacteriology Department, Public Health Wales Microbiology, Swansea, SA2 8QA, UK
| | - Joseph Westlake
- Specialist Antimicrobial Chemotherapy Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Jonathan Jenkins
- Pathogen Genomics Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Catie Williams
- Pathogen Genomics Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Sara Rey
- Pathogen Genomics Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Joanne Watkins
- Pathogen Genomics Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Victoria Daniel
- Bacteriology Department, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Shanine Mitchell
- Bacteriology Department, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Gavin Forbes
- Bacteriology Department, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Mandy Wootton
- Specialist Antimicrobial Chemotherapy Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
| | - Lim Jones
- Specialist Antimicrobial Chemotherapy Unit, Public Health Wales Microbiology, Cardiff, CF14 4XW, UK
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Wessel AK, Yoshii Y, Reder A, Boudjemaa R, Szczesna M, Betton JM, Bernal-Bayard J, Beloin C, Lopez D, Völker U, Ghigo JM. Escherichia coli SPFH Membrane Microdomain Proteins HflKC Contribute to Aminoglycoside and Oxidative Stress Tolerance. Microbiol Spectr 2023; 11:e0176723. [PMID: 37347165 PMCID: PMC10434171 DOI: 10.1128/spectrum.01767-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/01/2023] [Indexed: 06/23/2023] Open
Abstract
Many eukaryotic membrane-dependent functions are often spatially and temporally regulated by membrane microdomains (FMMs), also known as lipid rafts. These domains are enriched in polyisoprenoid lipids and scaffolding proteins belonging to the stomatin, prohibitin, flotillin, and HflK/C (SPFH) protein superfamily that was also identified in Gram-positive bacteria. In contrast, little is still known about FMMs in Gram-negative bacteria. In Escherichia coli K-12, 4 SPFH proteins, YqiK, QmcA, HflK, and HflC, were shown to localize in discrete polar or lateral inner membrane locations, raising the possibility that E. coli SPFH proteins could contribute to the assembly of inner membrane FMMs and the regulation of cellular processes. Here, we studied the determinant of the localization of QmcA and HflC and showed that FMM-associated cardiolipin lipid biosynthesis is required for their native localization pattern. Using Biolog phenotypic arrays, we showed that a mutant lacking all SPFH genes displayed increased sensitivity to aminoglycosides and oxidative stress that is due to the absence of HflKC. Our study therefore provides further insights into the contribution of SPFH proteins to stress tolerance in E. coli. IMPORTANCE Eukaryotic cells often segregate physiological processes in cholesterol-rich functional membrane microdomains. These domains are also called lipid rafts and contain proteins of the stomatin, prohibitin, flotillin, and HflK/C (SPFH) superfamily, which are also present in prokaryotes but have been mostly studied in Gram-positive bacteria. Here, we showed that the cell localization of the SPFH proteins QmcA and HflKC in the Gram-negative bacterium E. coli is altered in the absence of cardiolipin lipid synthesis. This suggests that cardiolipins contribute to E. coli membrane microdomain assembly. Using a broad phenotypic analysis, we also showed that HflKC contribute to E. coli tolerance to aminoglycosides and oxidative stress. Our study, therefore, provides new insights into the cellular processes associated with SPFH proteins in E. coli.
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Affiliation(s)
- Aimee K. Wessel
- Institut Pasteur, Université de Paris-Cité, CNRS UMR6047, Genetics of Biofilms Laboratory, Paris, France
| | - Yutaka Yoshii
- Institut Pasteur, Université de Paris-Cité, CNRS UMR6047, Genetics of Biofilms Laboratory, Paris, France
| | - Alexander Reder
- Department of Functional Genomics, Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | | | - Magdalena Szczesna
- Institut Pasteur, Université de Paris-Cité, CNRS UMR6047, Genetics of Biofilms Laboratory, Paris, France
- Centre for Bacteriology Resistance Biology, Imperial College London, London, United Kingdom
| | - Jean-Michel Betton
- Institut Pasteur, Université de Paris-Cité, UMR UMR6047, Stress adaptation and metabolism in enterobacteria, Paris, France
| | - Joaquin Bernal-Bayard
- Institut Pasteur, Université de Paris-Cité, CNRS UMR6047, Genetics of Biofilms Laboratory, Paris, France
- Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Seville, Spain
| | - Christophe Beloin
- Institut Pasteur, Université de Paris-Cité, CNRS UMR6047, Genetics of Biofilms Laboratory, Paris, France
| | - Daniel Lopez
- Universidad Autonoma de Madrid, Centro Nacional de Biotecnologia, Madrid, Spain
| | - Uwe Völker
- Department of Functional Genomics, Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Jean-Marc Ghigo
- Institut Pasteur, Université de Paris-Cité, CNRS UMR6047, Genetics of Biofilms Laboratory, Paris, France
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Jana S, Rajasekaran P, Haldimann K, Vasella A, Böttger EC, Hobbie SN, Crich D. Synthesis of Gentamicins C1, C2, and C2a and Antiribosomal and Antibacterial Activity of Gentamicins B1, C1, C1a, C2, C2a, C2b, and X2. ACS Infect Dis 2023; 9:1622-1633. [PMID: 37481733 PMCID: PMC10425985 DOI: 10.1021/acsinfecdis.3c00233] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Indexed: 07/25/2023]
Abstract
Complementing our earlier syntheses of the gentamicins B1, C1a, C2b, and X2, we describe the synthesis of gentamicins C1, C2, and C2a characterized by methyl substitution at the 6'-position, and so present an alternative access to previous chromatographic methods for accessing these sought-after compounds. We describe the antiribosomal activity of our full set of synthetic gentamicin congeners against bacterial ribosomes and hybrid ribosomes carrying the decoding A site of the human mitochondrial, A1555G mutant mitochondrial, and cytoplasmic ribosomes and establish structure-activity relationships with the substitution pattern around ring I to antiribosomal activity, antibacterial resistance due to the presence of aminoglycoside acetyl transferases acting on the 6'-position in ring I, and literature cochlear toxicity data.
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Affiliation(s)
- Santanu Jana
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Parasuraman Rajasekaran
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Klara Haldimann
- Institute
of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - Andrea Vasella
- Organic
Chemistry Laboratory, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland
| | - Erik C. Böttger
- Institute
of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - Sven N. Hobbie
- Institute
of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - David Crich
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Department
of Chemistry, University of Georgia, 302 East Campus Road, Athens, Georgia 30602, United States
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Lund D, Coertze RD, Parras-Moltó M, Berglund F, Flach CF, Johnning A, Larsson DGJ, Kristiansson E. Extensive screening reveals previously undiscovered aminoglycoside resistance genes in human pathogens. Commun Biol 2023; 6:812. [PMID: 37537271 PMCID: PMC10400643 DOI: 10.1038/s42003-023-05174-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023] Open
Abstract
Antibiotic resistance is a growing threat to human health, caused in part by pathogens accumulating antibiotic resistance genes (ARGs) through horizontal gene transfer. New ARGs are typically not recognized until they have become widely disseminated, which limits our ability to reduce their spread. In this study, we use large-scale computational screening of bacterial genomes to identify previously undiscovered mobile ARGs in pathogens. From ~1 million genomes, we predict 1,071,815 genes encoding 34,053 unique aminoglycoside-modifying enzymes (AMEs). These cluster into 7,612 families (<70% amino acid identity) of which 88 are previously described. Fifty new AME families are associated with mobile genetic elements and pathogenic hosts. From these, 24 of 28 experimentally tested AMEs confer resistance to aminoglycoside(s) in Escherichia coli, with 17 providing resistance above clinical breakpoints. This study greatly expands the range of clinically relevant aminoglycoside resistance determinants and demonstrates that computational methods enable early discovery of potentially emerging ARGs.
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Affiliation(s)
- David Lund
- Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
| | - Roelof Dirk Coertze
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Marcos Parras-Moltó
- Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
| | - Fanny Berglund
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Carl-Fredrik Flach
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Johnning
- Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Systems and Data Analysis, Fraunhofer-Chalmers Centre, Gothenburg, Sweden
| | - D G Joakim Larsson
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Erik Kristiansson
- Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden.
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden.
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Venkateswaran P, Vasudevan S, David H, Shaktivel A, Shanmugam K, Neelakantan P, Solomon AP. Revisiting ESKAPE Pathogens: virulence, resistance, and combating strategies focusing on quorum sensing. Front Cell Infect Microbiol 2023; 13:1159798. [PMID: 37457962 PMCID: PMC10339816 DOI: 10.3389/fcimb.2023.1159798] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 06/08/2023] [Indexed: 07/18/2023] Open
Abstract
The human-bacterial association is long-known and well-established in terms of both augmentations of human health and attenuation. However, the growing incidents of nosocomial infections caused by the ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter sp.) call for a much deeper understanding of these organisms. Adopting a holistic approach that includes the science of infection and the recent advancements in preventing and treating infections is imperative in designing novel intervention strategies against ESKAPE pathogens. In this regard, this review captures the ingenious strategies commissioned by these master players, which are teamed up against the defenses of the human team, that are equally, if not more, versatile and potent through an analogy. We have taken a basketball match as our analogy, dividing the human and bacterial species into two teams playing with the ball of health. Through this analogy, we make the concept of infectious biology more accessible.
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Affiliation(s)
- Parvathy Venkateswaran
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Sahana Vasudevan
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Helma David
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Adityan Shaktivel
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Karthik Shanmugam
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Prasanna Neelakantan
- Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Adline Princy Solomon
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
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Gambato S, Bellotto O, Mardirossian M, Di Stasi A, Gennaro R, Pacor S, Caporale A, Berti F, Scocchi M, Tossi A. Designing New Hybrid Antibiotics: Proline-Rich Antimicrobial Peptides Conjugated to the Aminoglycoside Tobramycin. Bioconjug Chem 2023. [PMID: 37379329 PMCID: PMC10360068 DOI: 10.1021/acs.bioconjchem.2c00467] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Resistance to aminoglycoside antibiotics is a serious problem, typically arising from inactivating enzymes, reduced uptake, or increased efflux in the important pathogens for which they are used as treatment. Conjugating aminoglycosides to proline-rich antimicrobial peptides (PrAMPs), which also target ribosomes and have a distinct bacterial uptake mechanism, might mutually benefit their individual activities. To this aim we have developed a strategy for noninvasively modifying tobramycin to link it to a Cys residue and through this covalently link it to a Cys-modified PrAMP by formation of a disulfide bond. Reduction of this bridge in the bacterial cytosol should release the individual antimicrobial moieties. We found that the conjugation of tobramycin to the well-characterized N-terminal PrAMP fragment Bac7(1-35) resulted in a potent antimicrobial capable of inactivating not only tobramycin-resistant bacterial strains but also those less susceptible to the PrAMP. To a certain extent, this activity also extends to the shorter and otherwise poorly active fragment Bac7(1-15). Although the mechanism that allows the conjugate to act when its individual components do not is as yet unclear, results are very promising and suggest this may be a way of resensitizing pathogens that have developed resistance to the antibiotic.
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Affiliation(s)
- Stefano Gambato
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
| | - Ottavia Bellotto
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgeri, 1, 34127 Trieste, Italy
| | - Mario Mardirossian
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
| | - Adriana Di Stasi
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
| | - Renato Gennaro
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
| | - Sabrina Pacor
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
| | - Andrea Caporale
- CNR, Institute of Crystallography, SS 14 Km 163.5 c/o Area Science Park, Basovizza, 34149 Trieste, Italy
- CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", 80134 Napoli, Italy
| | - Federico Berti
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgeri, 1, 34127 Trieste, Italy
| | - Marco Scocchi
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste, Via L. Giorgeri, 5, 34127 Trieste, Italy
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42
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Zhang C, Wang C, Zhao X, Hakizimana I. Effect of resistance difference on distribution of antibiotics in bacterial cell and conjugative gene transfer risks during electrochemical flow through reaction. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:163142. [PMID: 36996977 DOI: 10.1016/j.scitotenv.2023.163142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/24/2023] [Accepted: 03/25/2023] [Indexed: 05/13/2023]
Abstract
The occurrences and spread of antibiotic resistance (AR) mediated by horizontal gene transfer (HGT) of antibiotic resistance genes (ARGs) in aquatic environment have been aggravated because of the abuse of antibiotics. While the pressure of different antibiotics is known to induce the spread of AR in bacteria, whether distribution of different antibiotics in cell structure could affect HGT risks is not clear. Here, a significant difference between the distribution of tetracycline hydrochloride (Tet) and sulfamethoxazole (Sul) in cell structure during electrochemical flow through reaction (EFTR) process was firstly reported. Meanwhile, EFTR treatment possessed excellent disinfection performance and consequently controlled the HGT risks. The intracellular Tet (iTet) was discharged through efflux pumps to increase the content of extracellular Tet (eTet) due to the resistance of donor E. coli DH5α under the selective pressure of Tet, declining the damage of donor and plasmid RP4. The HGT frequency was 8.18-fold increase compared with that by EFTR treatment alone. While the secretion of intracellular Sul (iSul) was inhibited by blocking the formation of efflux pumps to inactivate the donor under the Sul pressure, and the total content of iSul and adsorbed Sul (aSul) to be 1.36-fold higher than that of eSul. Therefore, the reactive oxygen species (ROS) generation and cell membrane permeability were improved to release ARGs, and •OH attacked plasmid RP4 in the EFTR process, inhibiting the HGT risks. This study advances the awareness of the interaction between distribution of different antibiotics in cell structure and the HGT risks in the EFTR process.
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Affiliation(s)
- Cong Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Can Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
| | - Xin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
| | - Israel Hakizimana
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
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43
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Sheng X, Lu W, Li A, Lu J, Song C, Xu J, Dong Y, Fu C, Lin X, Zhu M, Bao Q, Li K. ANT(9)-Ic, a Novel Chromosomally Encoded Aminoglycoside Nucleotidyltransferase from Brucella intermedia. Microbiol Spectr 2023; 11:e0062023. [PMID: 37039640 PMCID: PMC10269693 DOI: 10.1128/spectrum.00620-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/27/2023] [Indexed: 04/12/2023] Open
Abstract
Aminoglycoside-modifying enzymes are among the most important mechanisms of resistance to aminoglycoside antibiotics, typically conferring high-level resistance by enzymatic drug inactivation. Previously, we isolated a multidrug-resistant Brucella intermedia strain ZJ499 from a cancer patient, and whole-genome sequencing revealed several putative novel aminoglycoside-modifying enzyme genes in this strain. Here, we report the characterization of one of them that encodes an intrinsic, chromosomal aminoglycoside nucleotidyltransferase designated ANT(9)-Ic, which shares only 33.05% to 47.44% amino acid identity with the most closely related ANT(9)-I enzymes. When expressed in Escherichia coli, ANT(9)-Ic conferred resistance only to spectinomycin and not to any other aminoglycosides tested, indicating a substrate profile typical of ANT(9)-I enzymes. Consistent with this, deletion of ant(9)-Ic in ZJ499 resulted in a specific and significant decrease in MIC of spectinomycin. Furthermore, the purified ANT(9)-Ic protein showed stringent substrate specificity for spectinomycin with a Km value of 44.83 μM and a kcat/Km of 2.8 × 104 M-1 s-1, echoing the above observations of susceptibility testing. In addition, comparative genomic analysis revealed that the genetic context of ant(9)-Ic was conserved in Brucella, with no mobile genetic elements found within its 20-kb surrounding region. Overall, our results demonstrate that ANT(9)-Ic is a novel member of the ANT(9)-I lineage, contributing to the intrinsic spectinomycin resistance of ZJ499. IMPORTANCE The emergence, evolution, and worldwide spread of antibiotic resistance present a significant global public health crisis. For aminoglycoside antibiotics, enzymatic drug modification is the most common mechanism of resistance. We identify a novel chromosomal aminoglycoside nucleotidyltransferase from B. intermedia, called ANT(9)-Ic, which shares the highest identity (47.44%) with the previously known ANT(9)-Ia and plays an important role in spectinomycin resistance of the host strain. Analysis of the genetic environment and origin of ant(9)-Ic shows that the gene and its surrounding region are widely conserved in Brucella, and no mobile elements are detected, indicating that ANT(9)-Ic may be broadly important in the natural resistance to spectinomycin of Brucella species.
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Affiliation(s)
- Xiusheng Sheng
- Medical Molecular Biology Laboratory, School of Medicine, Jinhua Polytechnic, Jinhua, China
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Wei Lu
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Aifang Li
- Fifth Affiliated Hospital, Wenzhou Medical University, Lishui, Zhejiang, China
| | - Junwan Lu
- Medical Molecular Biology Laboratory, School of Medicine, Jinhua Polytechnic, Jinhua, China
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Chunhan Song
- Medical Molecular Biology Laboratory, School of Medicine, Jinhua Polytechnic, Jinhua, China
| | - Jiefeng Xu
- Medical Molecular Biology Laboratory, School of Medicine, Jinhua Polytechnic, Jinhua, China
| | - Youming Dong
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Chunqing Fu
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xi Lin
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Mei Zhu
- Department of Clinical Laboratory, Zhejiang Hospital, Hangzhou, Zhejiang, China
| | - Qiyu Bao
- Medical Molecular Biology Laboratory, School of Medicine, Jinhua Polytechnic, Jinhua, China
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Kewei Li
- Institute of Biomedical Informatics, Key Laboratory of Medical Genetics of Zhejiang Province, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
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Yasuda N, Fujita T, Fujioka T, Tagawa M, Kohira N, Torimaru K, Shiota S, Kumagai T, Morita D, Ogawa W, Tsuchiya T, Kuroda T. Effects of the order of exposure to antimicrobials on the incidence of multidrug-resistant Pseudomonas aeruginosa. Sci Rep 2023; 13:8826. [PMID: 37258635 DOI: 10.1038/s41598-023-35256-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 05/15/2023] [Indexed: 06/02/2023] Open
Abstract
Multidrug-resistant Pseudomonas aeruginosa (MDRP) is one of the most important pathogens in clinical practice. To clarify the mechanisms contributing to its emergence, we isolated MDRPs using the P. aeruginosa PAO1, the whole genome sequence of which has already been elucidated. Mutant strains resistant to carbapenems, aminoglycosides, and new quinolones, which are used to treat P. aeruginosa infections, were isolated; however, none met the criteria for MDRPs. Then, PAO1 strains were exposed to these antimicrobial agents in various orders and the appearance rate of MDRP varied depending on the order of exposure; MDRPs more frequently appeared when gentamicin was applied before ciprofloxacin, but were rarely isolated when ciprofloxacin was applied first. Exposure to ciprofloxacin followed by gentamicin increased the expression of MexCD-OprJ, an RND-type multidrug efflux pump, due to the NfxB mutation. In contrast, exposure to gentamicin followed by ciprofloxacin resulted in more mutations in DNA gyrase. These results suggest that the type of quinolone resistance mechanism is related to the frequency of MDRP and that the risk of MDRP incidence is highly dependent on the order of exposure to gentamicin and ciprofloxacin.
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Affiliation(s)
- Nami Yasuda
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
| | - Tomoko Fujita
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
| | - Takahiro Fujioka
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
| | - Mei Tagawa
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
| | - Naoki Kohira
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
| | - Kensho Torimaru
- Department of Microbiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Sumiko Shiota
- Department of Molecular Biology, School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Naka-ku, Okayama, 703-8516, Japan
| | - Takanori Kumagai
- Department of Microbiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Daichi Morita
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
- Department of Microbiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Wakano Ogawa
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
- Department of Microbiology and Biochemistry, Daiichi University of Pharmacy, 22-1, Tamagawa-Machi, Minami-ku, Fukuoka, 815-8511, Japan
| | - Tomofusa Tsuchiya
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan
| | - Teruo Kuroda
- Department of Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1, Tsushima-Naka, Kita-ku, Okayama, 700-8530, Japan.
- Department of Microbiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8553, Japan.
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Yang J, Rainville P. Liquid Chromatography-Tandem Mass Spectrometry Analysis of Aminoglycosides in Foods Using an Ethylene-Bridged Hybrid Zwitterionic Stationary Phase and Hydrophilic-Lipophilic-Balanced Solid-Phase Extraction Cartridges. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:7593-7603. [PMID: 37139986 DOI: 10.1021/acs.jafc.3c01175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This work aimed to develop an analytical method for the screening of multiple aminoglycoside residues in foods of animal origin using an ethylene-bridged hybrid (BEH) particle-based sulfoalkylbetaine stationary phase. The effects of chromatographic conditions on the separation of 17 aminoglycosides have been systematically investigated. Sample preparation and mass spectrometry detection have also been investigated and optimized. In contrast to high buffer concentrations in the mobile phase required for silica-based sulfoalkylbetaine stationary phases, a moderate buffer concentration (20 mM) provided the optimal separation of 17 aminoglycosides with the BEH sulfoalkylbetaine stationary phase. The developed method has been evaluated in milk, beef, pork, liver, and honey samples with good performance for retention, selectivity, sensitivity, linearity, precision, and accuracy. The majority of the limit of quantitation estimated with the matrix was less than 25 μg/kg. The overall accuracy across five matrices was in the range from 96 to 111%, with standard deviations of less than 19%.
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Affiliation(s)
- Jinchuan Yang
- Waters Corporation, Milford, Massachusetts 01757, United States
| | - Paul Rainville
- Waters Corporation, Milford, Massachusetts 01757, United States
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Srinivas P, Nosrati M, Zelinskaya N, Dey D, Comstock LR, Dunham CM, Conn GL. 30S subunit recognition and G1405 modification by the aminoglycoside-resistance 16S ribosomal RNA methyltransferase RmtC. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.13.532395. [PMID: 36993224 PMCID: PMC10054953 DOI: 10.1101/2023.03.13.532395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Acquired ribosomal RNA (rRNA) methylation has emerged as a significant mechanism of aminoglycoside resistance in pathogenic bacterial infections. Modification of a single nucleotide in the ribosome decoding center by the aminoglycoside-resistance 16S rRNA (m 7 G1405) methyltransferases effectively blocks the action of all 4,6-deoxystreptamine ring-containing aminoglycosides, including the latest generation of drugs. To define the molecular basis of 30S subunit recognition and G1405 modification by these enzymes, we used a S-adenosyl-L-methionine (SAM) analog to trap the complex in a post-catalytic state to enable determination of an overall 3.0 Ã… cryo-electron microscopy structure of the m 7 G1405 methyltransferase RmtC bound to the mature Escherichia coli 30S ribosomal subunit. This structure, together with functional analyses of RmtC variants, identifies the RmtC N-terminal domain as critical for recognition and docking of the enzyme on a conserved 16S rRNA tertiary surface adjacent to G1405 in 16S rRNA helix 44 (h44). To access the G1405 N7 position for modification, a collection of residues across one surface of RmtC, including a loop that undergoes a disorder to order transition upon 30S subunit binding, induces significant distortion of h44. This distortion flips G1405 into the enzyme active site where it is positioned for modification by two almost universally conserved RmtC residues. These studies expand our understanding of ribosome recognition by rRNA modification enzymes and present a more complete structural basis for future development of strategies to inhibit m 7 G1405 modification to re-sensitize bacterial pathogens to aminoglycosides.
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Liu Y, Feng M, Johansen A, Cheng D, Xue J, Feng Y, Fan S, Li Z. Composting reduces the risks of antibiotic resistance genes in maize seeds posed by gentamicin fermentation waste. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:161785. [PMID: 36736399 DOI: 10.1016/j.scitotenv.2023.161785] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Using high-throughput quantitative PCR and next generation sequencing, the impact of land application of raw and composted gentamicin fermentation waste (GFW) on antibiotic resistance genes (ARGs) in maize seeds was studied in a three-year field trial. The raw and composted GFW changed both the bacterial community composition and the ARGs diversity in the maize seeds compared to non-amended controls and chemical fertilizer. The abundance of ARGs after raw GFW amendment was significantly higher than other treatments because of a high abundance of aadA1, qacEdeltal and aph(2')-Id-02; probably induced by gentamicin selection pressure in maize tissues. Meanwhile, the potential host of these three ARGs, pathogenic bacteria Tenacibaculum, also increased significantly in maize seeds after the application of raw GFW. But our result proved that composting could weaken the risk posed by GFW. We further reveal that the key biotic driver for shaping the ARG profiles in maize seeds is bacterial community followed by heavy metal resistance genes, and ARGs are more likely located on bacterial chromosomes. Our findings provide new insight into ARGs dispersal mechanism in maize seeds after long-term GFW application, demonstrate the potential benefits of composting the GFW to reduce risks as well as the potential efficient management method to GFW.
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Affiliation(s)
- Yuanwang Liu
- Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China; Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, China-New Zealand Joint Laboratory for Soil Molecular Ecology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Minmin Feng
- Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Anders Johansen
- Department of Environmental Science, Faculty of Technical Sciences, Aarhus University, Roskilde 4000, Denmark
| | - Dengmiao Cheng
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Jianming Xue
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; Scion, Private Bag 29237, Christchurch 8440, New Zealand
| | - Yao Feng
- Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, China-New Zealand Joint Laboratory for Soil Molecular Ecology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shuanghu Fan
- College of Life Science, Langfang Normal University, Langfang 065000, China
| | - Zhaojun Li
- Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, China-New Zealand Joint Laboratory for Soil Molecular Ecology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Mohamad-Ramshan R, Ande C, Matsushita T, Haldimann K, Vasella A, Hobbie SN, Crich D. Synthesis of 4- O-(4-Amino-4-deoxy-β-D-xylopyranosyl)paromomycin and 4- S-(β-D-Xylopyranosyl)-4-deoxy-4'-thio-paromomycin and Evaluation of their Antiribosomal and Antibacterial Activity. Tetrahedron 2023; 135:133330. [PMID: 37035443 PMCID: PMC10081503 DOI: 10.1016/j.tet.2023.133330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The design, synthesis and antiribosomal and antibacterial activity of two novel glycosides of the aminoglycoside antibiotic paromomycin are described. The first carries of 4-amino-4-deoxy-β-D-xylopyranosyl moiety at the paromomycin 4'-position and is approximately two-fold more active than the corresponding β-D-xylopyranosyl derivative. The second is a 4'-(β-D-xylopyranosylthio) derivative of 4'-deoxyparomomycin that is unexpectedly less active than the simple β-D-xylopyranosyl derivative, perhaps because of the insertion of the conformationally more mobile thioglycosidic linkage.
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Affiliation(s)
| | - Chennaiah Ande
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
| | - Takahiko Matsushita
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
| | - Klara Haldimann
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - Andrea Vasella
- Organic Chemistry Laboratory, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland
| | - Sven N Hobbie
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - David Crich
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, 302 East Campus Road, Athens, GA 30602, USA
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
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49
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Gill SP, Snelling WJ, Dooley JSG, Ternan NG, Banat IM, Arnscheidt J, Hunter WR. Biological and synthetic surfactant exposure increases antimicrobial gene occurrence in a freshwater mixed microbial biofilm environment. Microbiologyopen 2023; 12:e1351. [PMID: 37186226 PMCID: PMC10022493 DOI: 10.1002/mbo3.1351] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/08/2023] [Indexed: 03/19/2023] Open
Abstract
Aquatic habitats are particularly susceptible to chemical pollution, such as antimicrobials, from domestic, agricultural, and industrial sources. This has led to the rapid increase of antimicrobial resistance (AMR) gene prevalence. Alternate approaches to counteract pathogenic bacteria are in development including synthetic and biological surfactants such as sodium dodecyl sulfate (SDS) and rhamnolipids. In the aquatic environment, these surfactants may be present as pollutants with the potential to affect biofilm formation and AMR gene occurrence. We tested the effects of rhamnolipid and SDS on aquatic biofilms in a freshwater stream in Northern Ireland. We grew biofilms on contaminant exposure substrates deployed within the stream over 4 weeks. We then extracted DNA and carried out shotgun sequencing using a MinION portable sequencer to determine microbial community composition, with 16S rRNA analyses (64,678 classifiable reads identified), and AMR gene occurrence (81 instances of AMR genes over 9 AMR gene classes) through a metagenomic analysis. There were no significant changes in community composition within all systems; however, biofilm exposed to rhamnolipid had a greater number of unique taxa as compared to SDS treatments and controls. AMR gene prevalence was higher in surfactant-treated biofilms, although not significant, with biofilm exposed to rhamnolipids having the highest presence of AMR genes and classes compared to the control or SDS treatments. Our results suggest that the presence of rhamnolipid encourages an increase in the prevalence of AMR genes in biofilms produced in mixed-use water bodies.
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Affiliation(s)
- Stephanie P. Gill
- Department of Geography and Environmental StudiesUlster University ColeraineLondonderryNorthern Ireland
| | - William J. Snelling
- Nutrition Innovation Centre for Food and Health (NICHE)Ulster University ColeraineLondonderryNorthern Ireland
- School of Biomedical SciencesUlster University ColeraineLondonderryNorthern Ireland
| | - James S. G. Dooley
- Nutrition Innovation Centre for Food and Health (NICHE)Ulster University ColeraineLondonderryNorthern Ireland
- School of Biomedical SciencesUlster University ColeraineLondonderryNorthern Ireland
| | - Nigel G. Ternan
- Nutrition Innovation Centre for Food and Health (NICHE)Ulster University ColeraineLondonderryNorthern Ireland
- School of Biomedical SciencesUlster University ColeraineLondonderryNorthern Ireland
| | - Ibrahim M. Banat
- School of Biomedical SciencesUlster University ColeraineLondonderryNorthern Ireland
| | - Joerg Arnscheidt
- Department of Geography and Environmental StudiesUlster University ColeraineLondonderryNorthern Ireland
| | - William R. Hunter
- Fisheries and Aquatic Ecosystems BranchAgri‐Food and Biosciences InstituteBelfastNorthern Ireland
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50
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Pradier L, Bedhomme S. Ecology, more than antibiotics consumption, is the major predictor for the global distribution of aminoglycoside-modifying enzymes. eLife 2023; 12:e77015. [PMID: 36785930 PMCID: PMC9928423 DOI: 10.7554/elife.77015] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 01/24/2023] [Indexed: 02/15/2023] Open
Abstract
Antibiotic consumption and its abuses have been historically and repeatedly pointed out as the major driver of antibiotic resistance emergence and propagation. However, several examples show that resistance may persist despite substantial reductions in antibiotic use, and that other factors are at stake. Here, we study the temporal, spatial, and ecological distribution patterns of aminoglycoside resistance, by screening more than 160,000 publicly available genomes for 27 clusters of genes encoding aminoglycoside-modifying enzymes (AME genes). We find that AME genes display a very ubiquitous pattern: about 25% of sequenced bacteria carry AME genes. These bacteria were sequenced from all the continents (except Antarctica) and terrestrial biomes, and belong to a wide number of phyla. By focusing on European countries between 1997 and 2018, we show that aminoglycoside consumption has little impact on the prevalence of AME-gene-carrying bacteria, whereas most variation in prevalence is observed among biomes. We further analyze the resemblance of resistome compositions across biomes: soil, wildlife, and human samples appear to be central to understand the exchanges of AME genes between different ecological contexts. Together, these results support the idea that interventional strategies based on reducing antibiotic use should be complemented by a stronger control of exchanges, especially between ecosystems.
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Affiliation(s)
- Léa Pradier
- CEFE, CNRS, Univ Montpellier, EPHE, IRDMontpellierFrance
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