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Valdez C, Costa C, Simões M, de Carvalho CCCR, Baptista T, Campos MJ. Detection of mcr-1 Gene in Undefined Vibrio Species Isolated from Clams. Microorganisms 2022; 10:microorganisms10020394. [PMID: 35208850 PMCID: PMC8876837 DOI: 10.3390/microorganisms10020394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/24/2022] [Accepted: 02/03/2022] [Indexed: 01/27/2023] Open
Abstract
The increase of antimicrobial resistant strains is leading to an emerging threat to public health. Pathogenic Vibrio are responsible for human and animal illness. The Enterobacteriaceae family includes microorganisms that affect humans, causing several infections. One of the main causes of human infection is related to the ingestion of undercooked seafood. Due to their filter-feeding habit, marine invertebrates, such as clams, are known to be a natural reservoir of specific microbial communities. In the present study, Vibrionaceae and coliforms microorganisms were isolated from clams. A microbial susceptibility test was performed using the disk diffusion method. From 43 presumptive Vibrio spp. and 17 coliforms, three Vibrio spp. with MICs to colistin >512 mg L−1 were found. From the 23 antimicrobial resistance genes investigated, only the three isolates that showed phenotypic resistance to colistin contained the mcr-1 gene. Genotypic analysis for virulence genes in EB07V indicated chiA gene presence. The results from the plasmid cure and transformation showed that the resistance is chromosomally mediated. Biochemical analysis and MLSA, on the basis of four protein-coding gene sequences (recA, rpoB, groEL and dnaJ), grouped the isolates into the genus Vibrio but distinguished them as different from any known Vibrio spp.
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Affiliation(s)
- Christian Valdez
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-630 Peniche, Portugal; (C.V.); (C.C.); (M.S.); (T.B.)
| | - Cátia Costa
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-630 Peniche, Portugal; (C.V.); (C.C.); (M.S.); (T.B.)
| | - Marco Simões
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-630 Peniche, Portugal; (C.V.); (C.C.); (M.S.); (T.B.)
| | - Carla C. C. R. de Carvalho
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
| | - Teresa Baptista
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-630 Peniche, Portugal; (C.V.); (C.C.); (M.S.); (T.B.)
| | - Maria J. Campos
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-630 Peniche, Portugal; (C.V.); (C.C.); (M.S.); (T.B.)
- Correspondence:
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Khedher MB, Baron SA, Riziki T, Ruimy R, Raoult D, Diene SM, Rolain JM. Massive analysis of 64,628 bacterial genomes to decipher water reservoir and origin of mobile colistin resistance genes: is there another role for these enzymes? Sci Rep 2020; 10:5970. [PMID: 32249837 PMCID: PMC7136264 DOI: 10.1038/s41598-020-63167-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/12/2020] [Indexed: 11/09/2022] Open
Abstract
Since 2015, new worrying colistin resistance mechanism, mediated by mcr-1 gene has been reported worldwide along with eight newly described variants but their source(s) and reservoir(s) remain largely unexplored. Here, we conducted a massive bioinformatic analysis of bacterial genomes to investigate the reservoir and origin of mcr variants. We identified 13'658 MCR-1 homologous sequences in 494 bacterial genera. Moreover, analysis of 64'628 bacterial genomes (60 bacterial genera and 1'047 species) allows identifying a total of 6'651 significant positive hits (coverage >90% and similarity >50%) with the nine MCR variants from 39 bacterial genera and more than 1'050 species. A high number of MCR-1 was identified in Escherichia coli (n = 862). Interestingly, while almost all variants were identified in bacteria from different sources (i.e. human, animal, and environment), the last variant, MCR-9, was exclusively detected in bacteria from human. Although these variants could be identified in bacteria from human and animal sources, we found plenty MCR variants in unsuspected bacteria from environmental origin, especially from water sources. The ubiquitous presence of mcr variants in bacteria from water likely suggests another role in the biosphere of these enzymes as an unknown defense system against natural antimicrobial peptides and/or bacteriophage predation.
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Affiliation(s)
- Mariem Ben Khedher
- Aix Marseille Univ., IRD, APHM, MEPHI, IHU-Mediterranee Infection, Marseille, France
| | - Sophie Alexandra Baron
- Aix Marseille Univ., IRD, APHM, MEPHI, IHU-Mediterranee Infection, Marseille, France
- IHU-Mediterranee Infection, Marseille, France
| | - Toilhata Riziki
- Aix Marseille Univ., IRD, APHM, MEPHI, IHU-Mediterranee Infection, Marseille, France
| | - Raymond Ruimy
- Centre Hospitalier Universitaire de Nice, Laboratoire de bactériologie, Nice, France
| | - Didier Raoult
- Aix Marseille Univ., IRD, APHM, MEPHI, IHU-Mediterranee Infection, Marseille, France
- IHU-Mediterranee Infection, Marseille, France
| | - Seydina M Diene
- Aix Marseille Univ., IRD, APHM, MEPHI, IHU-Mediterranee Infection, Marseille, France.
- IHU-Mediterranee Infection, Marseille, France.
| | - Jean-Marc Rolain
- Aix Marseille Univ., IRD, APHM, MEPHI, IHU-Mediterranee Infection, Marseille, France.
- IHU-Mediterranee Infection, Marseille, France.
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Targeting amine- and phenol-containing metabolites in urine by dansylation isotope labeling and liquid chromatography mass spectrometry for evaluation of bladder cancer biomarkers. J Food Drug Anal 2019; 27:460-474. [PMID: 30987717 PMCID: PMC9296201 DOI: 10.1016/j.jfda.2018.11.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/29/2018] [Accepted: 11/23/2018] [Indexed: 02/08/2023] Open
Abstract
Metabolomics is considered an effective approach for understanding metabolic responses in complex biological systems. Accordingly, it has attracted increasing attention for biomarker discovery, especially in cancer. In this study, we used a non-invasive method to evaluate four urine metabolite biomarker candidates—o-phosphoethanolamine, 3-amio-2-piperidone, uridine and 5-hydroxyindoleactic acid—for their potential as bladder cancer diagnostic biomarkers. To analyze these targeted amine- and phenol-containing metabolites, we used differential 12C2-/13C2-dansylation labeling coupled with liquid chromatography/tandem mass spectrometry, which has previously been demonstrated to exhibit high sensitivity and reproducibility. Specifically, we used ultra-performance liquid chromatography (UPLC) coupled with high-resolution Fourier transform ion-cyclotron resonance MS system (LC-FT/MS) and an ion trap MS with MRM function (LC-HCT/MS) for targeted quantification. The urinary metabolites of interest were well separated and quantified using this approach. To apply this approach to clinical urine specimens, we spiked samples with 13C2-dansylatedsynthetic compounds, which served as standards for targeted quantification of 12C2-dansylated urinary endogenous metabolites using LC-FT/MS as well as LC-HCT/MS with MRM mode. These analyses revealed significant differences in two of the four metabolites of interest—o-phosphoethanolamine and uridine—between bladder cancer and non-cancer groups. O-phosphoethanolamine was the most promising single biomarker, with an area-under-the-curve (AUC) value of 0.709 for bladder cancer diagnosis. Diagnostic performance was improved by combining uridine and o-phosphoe-thanolamine in a marker panel, yielding an AUC value of 0.726. This study confirmed discovery-phase features of the urine metabolome of bladder cancer patients and verified their importance for further study.
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