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Sato JL, Fonseca DLDH, Galhardo RS. rumAB genes from SXT/R391 ICEs confer UV-induced mutability to Proteus mirabilis hosts and improve conjugation after UV irradiation. DNA Repair (Amst) 2022; 112:103297. [DOI: 10.1016/j.dnarep.2022.103297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 01/08/2023]
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Hu R, Wang X, Muhamamd I, Wang Y, Dong W, Zhang H, Wang Y, Liu S, Gao Y, Kong L, Ma H. Biological Characteristics and Genetic Analysis of a Highly Pathogenic Proteus Mirabilis Strain Isolated From Dogs in China. Front Vet Sci 2020; 7:589. [PMID: 33134334 PMCID: PMC7575763 DOI: 10.3389/fvets.2020.00589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 07/22/2020] [Indexed: 11/22/2022] Open
Abstract
To evaluate the antimicrobial resistance and virulence gene characteristics of highly pathogenic Proteus mirabilis. In this study, we isolated P. mirabilis CC15031 from diarrhea dogs in China, tested the median lethal dose (LD50), and measured the minimum inhibitory concentration (MIC) of 10 different antibiotics commonly used in veterinary clinic. Meanwhile, we presented the complete genome sequence annotations to analyze the virulence and resistance formation mechanism. The results showed that the CC15031 presented relatively potent pathogenicity in mice (LD50 = 0.57 × 106 CFU) and exhibited a high degree of resistance to all the tested antimicrobial agents. The CC15031 genome of 4,031,742 bp with 3,745 predicted genes had an average gene length of 917 bp and 38.99% guanine-cytosine content. A new variant of an integrative and conjugative element with a type IV secretion system (217,446 bp) conferring multidrug resistance was identified and characterized by structural analysis in CC15031. These data provide a foundation for understanding the genomic features and antimicrobial resistance mechanisms of this pathogen.
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Affiliation(s)
- Renge Hu
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Xue Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Inam Muhamamd
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yiming Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Wenlong Dong
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Haipeng Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yu Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Shuming Liu
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yunhang Gao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.,The Key Laboratory of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Lingcong Kong
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.,The Key Laboratory of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Hongxia Ma
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.,The Key Laboratory of Animal Production, Product Quality and Security, Ministry of Education, Jilin Agricultural University, Changchun, China
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Ribeiro ÁCDS, Martins WMBDS, Silva AAD, Gales AC, Rando DGG, Minarini LADR. Exposure to sub-inhibitory ciprofloxacin and nitrofurantoin concentrations increases recA gene expression in uropathogenic Escherichia coli: The role of RecA protein as a drug target. Eur J Pharm Sci 2020; 146:105268. [PMID: 32081832 DOI: 10.1016/j.ejps.2020.105268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/03/2020] [Accepted: 02/15/2020] [Indexed: 01/01/2023]
Abstract
Sub-inhibitory concentrations (sub-MIC) of antimicrobial agents can lead to genetic changes in bacteria, modulating the expression of genes related to bacterial stress and leading to drug resistance. Herein we describe the impact of sub-MIC of ciprofloxacin and nitrofurantoin on three uropathogenic Escherichia coli strains. Disk-diffusion assays with different antimicrobial agents were tested to detect phenotype alterations, and quantitative real-time PCR (qRT-PCR) was performed to analyze the expression of ompF and recA genes. Significant reduction on the susceptibility to ciprofloxacin and nitrofurantoin was detected on disk diffusion test. The qRT-PCR results revealed a 1.2-4.7 increase in recA expression in all E. coli studied, while the ompF expression varied. Because RecA was pointed as an important component to the development of drug resistance, molecular docking studies were performed with three experimentally known inhibitors of this enzyme. These studies aimed to understand the inhibitory binding mode of such compounds. The results confirmed the ADP/ATP binding site as a potential site of inhibitor recognition and a binding mode based on π-stacking interactions with Tyr103 and hydrogen bonds with Tyr264. These findings can be useful for guiding the search and design of new antimicrobial agents, mainly concerning the treatment of infections with resistant bacterial strains.
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Affiliation(s)
- Ághata Cardoso da Silva Ribeiro
- Universidade Federal de São Paulo - UNIFESP, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Laboratório Multidisciplinar em Saúde e Meio Ambiente, Departamento de Ciências Farmacêuticas, Rua São Nicolau, 210 Diadema, SP, Brazil
| | - Willames Marcos Brasileiro da Silva Martins
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781 São Paulom, SP, Brazil
| | - Adilson Aderito da Silva
- Universidade Presbiteriana Mackenzie, Centro de Ciências Sociais e Aplicadas, Rua da Consolação, 930, São Paulo, SP, Brazil
| | - Ana Cristina Gales
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781 São Paulom, SP, Brazil
| | - Daniela Gonçales Galasse Rando
- Universidade Federal de São Paulo - UNIFESP, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Grupo de Pesquisas Químico-Farmacêuticas da UNIFESP, Departamento de Ciências Farmacêuticas, Rua São Nicolau, 210, Diadema, SP, Brazil
| | - Luciene Andrade da Rocha Minarini
- Universidade Federal de São Paulo - UNIFESP, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Laboratório Multidisciplinar em Saúde e Meio Ambiente, Departamento de Ciências Farmacêuticas, Rua São Nicolau, 210 Diadema, SP, Brazil.
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