1
|
Zhang L, Zhang X, Bai H, Li T, Zhang Z, Zong X, Shang X, Liu Z, Fan L. Characterization and Genome Analysis of the Delftia lacustris Strain LzhVag01 Isolated from Vaginal Discharge. Curr Microbiol 2024; 81:232. [PMID: 38898312 PMCID: PMC11186869 DOI: 10.1007/s00284-024-03758-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 05/22/2024] [Indexed: 06/21/2024]
Abstract
Delftia has been separated from freshwater, sludge, and soil and has emerged as a novel opportunistic pathogen in the female vagina. However, the genomic characteristics, pathogenicity, and biotechnological properties still need to be comprehensively investigated. In this study, a Delftia strain was isolated from the vaginal discharge of a 43-year-old female with histologically confirmed cervical intraepithelial neoplasm (CIN III), followed by whole-genome sequencing. Phylogenetic analysis and average nucleotide identity (ANI) analysis demonstrated that it belongs to Delftia lacustris, named D. lacustris strain LzhVag01. LzhVag01 was sensitive to β-lactams, macrolides, and tetracyclines but exhibited resistance to lincoamines, nitroimidazoles, aminoglycosides, and fluoroquinolones. Its genome is a single, circular chromosome of 6,740,460 bp with an average GC content of 66.59%. Whole-genome analysis identified 16 antibiotic resistance-related genes, which match the antimicrobial susceptibility profile of this strain, and 11 potential virulence genes. These pathogenic factors may contribute to its colonization in the vaginal environment and its adaptation and accelerate the progression of cervical cancer. This study sequenced and characterized the whole-genome of Delftia lacustris isolated from vaginal discharge, which provides investigators and clinicians with valuable insights into this uncommon species.
Collapse
Affiliation(s)
- Li Zhang
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Xin Zhang
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Huihui Bai
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Ting Li
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Zhan Zhang
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Xiaonan Zong
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Xiang Shang
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China
| | - Zhaohui Liu
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China.
| | - Linyuan Fan
- Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026, China.
| |
Collapse
|
2
|
Gonzales M, Jacquet P, Gaucher F, Chabrière É, Plener L, Daudé D. AHL-Based Quorum Sensing Regulates the Biosynthesis of a Variety of Bioactive Molecules in Bacteria. JOURNAL OF NATURAL PRODUCTS 2024; 87:1268-1284. [PMID: 38390739 DOI: 10.1021/acs.jnatprod.3c00672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Bacteria are social microorganisms that use communication systems known as quorum sensing (QS) to regulate diverse cellular behaviors including the production of various secreted molecules. Bacterial secondary metabolites are widely studied for their bioactivities including antibiotic, antifungal, antiparasitic, and cytotoxic compounds. Besides playing a crucial role in natural bacterial niches and intermicrobial competition by targeting neighboring organisms and conferring survival advantages to the producer, these bioactive molecules may be of prime interest to develop new antimicrobials or anticancer therapies. This review focuses on bioactive compounds produced under acyl homoserine lactone-based QS regulation by Gram-negative bacteria that are pathogenic to humans and animals, including the Burkholderia, Serratia, Pseudomonas, Chromobacterium, and Pseudoalteromonas genera. The synthesis, regulation, chemical nature, biocidal effects, and potential applications of these identified toxic molecules are presented and discussed in light of their role in microbial interactions.
Collapse
Affiliation(s)
- Mélanie Gonzales
- Aix Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille 13288, France
- Gene&GreenTK, Marseille 13005, France
| | | | | | - Éric Chabrière
- Aix Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille 13288, France
| | | | | |
Collapse
|
3
|
Kayansamruaj P, Dong H, Hirono I, Kondo H, Senapin S, Rodkhum C. Genome characterization of piscine ‘Scale drop and Muscle Necrosis syndrome’-associated strain ofVibrio harveyifocusing on bacterial virulence determinants. J Appl Microbiol 2018; 124:652-666. [DOI: 10.1111/jam.13676] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 11/24/2017] [Accepted: 12/18/2017] [Indexed: 01/22/2023]
Affiliation(s)
- P. Kayansamruaj
- Department of Veterinary Microbiology; Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
- Department of Aquaculture; Faculty of Fisheries; Kasetsart University; Bangkok Thailand
| | - H.T. Dong
- Aquaculture Vaccine Platform; Department of Microbiology; Faculty of Science; King Mongkut's University of Technology Thonburi; Bangkok Thailand
| | - I. Hirono
- Laboratory of Genome Science; Tokyo University of Marine Science and Technology; Tokyo Japan
| | - H. Kondo
- Laboratory of Genome Science; Tokyo University of Marine Science and Technology; Tokyo Japan
| | - S. Senapin
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp); Faculty of Science; Mahidol University; Bangkok Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC); National Science and Technology Development Agency; Pathumthani Thailand
| | - C. Rodkhum
- Department of Veterinary Microbiology; Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
- Fish Infectious Diseases (FIDs) - Special Task Force for Activating Research (STAR); Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
| |
Collapse
|
4
|
Dimmer JA, Núñez Montoya SC, Mendoza CS, Cabrera JL. Photosensitizing anthraquinones from Heterophyllaea lycioides (Rubiaceae). PHYTOCHEMISTRY 2017; 137:94-100. [PMID: 28196653 DOI: 10.1016/j.phytochem.2017.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 06/06/2023]
Abstract
Seven anthraquinones were isolated from aerial parts of Heterophyllaea lycioides (Rusby) Sandwith (Rubiaceae), including three derivatives that have not been described before: a hetero-bianthraquinone identified as (R)-2-hydroxymethyl-2'methyl-1,1',6,6'-tetrahydroxy-5,5' bianthraquinone (lycionine), and two mono-chlorinated derivatives related to soranjidiol. One of them is a homo-bianthraquinone: (R)-7-chloro-2,2'-dimethyl-1,1',6,6'-tetrahydroxy-5,5' bianthraquinone (7-chlorobisoranjidiol), whereas the second halogenated derivative corresponds to a monomeric structure: 5-chloro-1,6-dihydroxy-2-methyl anthraquinone (5-chlorosoranjidiol). The four known compounds were already isolated from another species of this genus, H. pustulata, and they were identified as 5,5'-bisoranjidiol, soranjidiol, pustuline and heterophylline. Structural elucidation was performed by means of an extensive spectroscopic analysis, including 1D and 2D NMR data as well as by HRMS analysis. Chemical structures of 7-chlorobisoranjidiol and 5-chlorosoranjidiol were confirmed by their synthesis from 5,5'-bisoranjidiol and soranjidiol, respectively. Type I photosensitizing properties (superoxide anion radical generation, O2-) were assessed by using the nitroblue tetrazolium assay. When lycionine and chlorinated derivatives were irradiated, they enhanced the O2- production with respect to the control; 7-chlorobisoranjidiol stood out by generating an increase of 20%, whereas the other anthraquinones only produced a slight increase of 7%.
Collapse
Affiliation(s)
- Jesica A Dimmer
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET and Farmacognosia, Dpto. de Farmacia, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, Córdoba, X5000HUA, Argentina
| | - Susana C Núñez Montoya
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET and Farmacognosia, Dpto. de Farmacia, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, Córdoba, X5000HUA, Argentina
| | - Caterine S Mendoza
- Dpto. de Farmacia, Facultad de Ciencias Químico Farmacéuticas y Bioquímicas, Universidad de San Francisco Xavier de Chuquisaca, Dalence 51, Sucre, Bolivia
| | - José L Cabrera
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET and Farmacognosia, Dpto. de Farmacia, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
| |
Collapse
|
5
|
Lanzetti M, Pires KMP, Santos JC, Ribeiro ML, Borges RM, da Silva AJR, Porto LC, Benjamim CF, Valenca SS. Ready-to-drink Matte® tea (diet and regular) increased life span and pulmonary health in aged mice. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
6
|
Dagorn A, Chapalain A, Mijouin L, Hillion M, Duclairoir-Poc C, Chevalier S, Taupin L, Orange N, Feuilloley MGJ. Effect of GABA, a bacterial metabolite, on Pseudomonas fluorescens surface properties and cytotoxicity. Int J Mol Sci 2013; 14:12186-204. [PMID: 23743829 PMCID: PMC3709781 DOI: 10.3390/ijms140612186] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 05/23/2013] [Accepted: 05/27/2013] [Indexed: 01/22/2023] Open
Abstract
Different bacterial species and, particularly Pseudomonas fluorescens, can produce gamma-aminobutyric acid (GABA) and express GABA-binding proteins. In this study, we investigated the effect of GABA on the virulence and biofilm formation activity of different strains of P. fluorescens. Exposure of a psychotropic strain of P. fluorescens (MF37) to GABA (10-5 M) increased its necrotic-like activity on eukaryotic (glial) cells, but reduced its apoptotic effect. Conversely, muscimol and bicuculline, the selective agonist and antagonist of eukaryote GABAA receptors, respectively, were ineffective. P. fluorescens MF37 did not produce biosurfactants, and its caseinase, esterase, amylase, hemolytic activity or pyoverdine productions were unchanged. In contrast, the effect of GABA was associated to rearrangements of the lipopolysaccharide (LPS) structure, particularly in the lipid A region. The surface hydrophobicity of MF37 was marginally modified, and GABA reduced its biofilm formation activity on PVC, but not on glass, although the initial adhesion was increased. Five other P. fluorescens strains were studied, and only one, MFP05, a strain isolated from human skin, showed structural differences of biofilm maturation after exposure to GABA. These results reveal that GABA can regulate the LPS structure and cytotoxicity of P. fluorescens, but that this property is specific to some strains.
Collapse
Affiliation(s)
- Audrey Dagorn
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Annelise Chapalain
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Lily Mijouin
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Mélanie Hillion
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Cécile Duclairoir-Poc
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Sylvie Chevalier
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Laure Taupin
- Laboratoire de Biotechnologie et Chimie Marines, Université de Bretagne-Sud B.P. 92116, Lorient cedex 56321, France; E-Mail:
| | - Nicole Orange
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
| | - Marc G. J. Feuilloley
- Laboratory of Microbiology Signal and Microenvironment LMSM, EA 4312, Normandie University, Rouen University, GRRs SSE, IRIB, VASI, Evreux F-27000, France; E-Mails: (A.D.); (A.C.); (L.M.); (M.H.); (C.D.-P.); (S.C.); (N.O.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +332-32-29-15-42; Fax: +332-32-29-15-50
| |
Collapse
|
7
|
Comini LR, Núñez Montoya SC, Sarmiento M, Cabrera JL, Argüello GA. Characterizing some photophysical, photochemical and photobiological properties of photosensitizing anthraquinones. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.12.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Yu Z, Yang X, Wang K. Metal ions induced heat shock protein response by elevating superoxide anion level in HeLa cells transformed by HSE-SEAP reporter gene. Toxicology 2006; 223:1-8. [PMID: 16595161 DOI: 10.1016/j.tox.2006.02.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Revised: 02/24/2006] [Accepted: 02/27/2006] [Indexed: 10/24/2022]
Abstract
The aim of this work is to define the relationship between heat shock protein (HSP) and reactive oxygen species (ROS) in the cells exposed to different concentrations of metal ions, and to evaluate a new method for tracing the dynamic levels of cellular reactive oxygen species using a HSE-SEAP reporter gene. The expression of heat shock protein was measured using a secreted alkaline phosphatase (SEAP) reporter gene transformed into HeLa cell strain, the levels of superoxide anion (O(2)(-)) and hydrogen peroxide (H(2)O(2)) were determined by NBT reduction assay and DCFH staining flow cytometry (FCM), respectively. The experimental results demonstrated that the expression of heat shock protein induced by metal ions was linearly related to the cellular superoxide anion level before cytotoxic effects were observed, but not related to the cellular hydrogen peroxide level. The experimental results suggested that metal ions might induce heat shock protein by elevating cellular superoxide anion level, and thus the expression of heat shock protein indicated by the HSE-SEAP reporter gene can be an effective model for monitoring the dynamic level of superoxide anion and early metal-induced oxidative stress/cytotoxicity.
Collapse
Affiliation(s)
- Zhanjiang Yu
- Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100083, PR China
| | | | | |
Collapse
|
9
|
Montoya SCN, Comini LR, Sarmiento M, Becerra C, Albesa I, Argüello GA, Cabrera JL. Natural anthraquinones probed as Type I and Type II photosensitizers: singlet oxygen and superoxide anion production. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2005; 78:77-83. [PMID: 15629252 DOI: 10.1016/j.jphotobiol.2004.09.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2004] [Revised: 07/10/2004] [Accepted: 09/07/2004] [Indexed: 11/19/2022]
Abstract
The photosensitizing properties of six anthraquinones (AQs): soranjidiol (1), soranjidiol-1-methyl ether (2), rubiadin (3), rubiadin-1-methyl ether (4), damnacanthal (5) and damnacanthol (6), isolated from leaves and stems of Heterophyllaea pustulata Hook. f. (Rubiaceae) were studied. By means of photobiological and photophysical methods in vitro, the type of photosensitization that these metabolites are capable of producing was determined. Whereas the photosensitized generation of superoxide anion radical (O(2)(-)) (Type I) was evaluated in leukocyte suspensions, singlet molecular oxygen ((1)O(2)) production (Type II) was examined in organic solution. In addition, the quantum yield of (1)O(2) (Phi) in chloroform was measured for those AQs that generate it. It was established that 4 behaves exclusively as a Type I photosensitizer. By contrast, the others AQs act by both types of mechanisms, among which 5 showed the largest Phi of (1)O(2).
Collapse
Affiliation(s)
- Susana C Núñez Montoya
- Farmacognosia, Departamento de Farmacia, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (IMBIV-CONICET), Ciudad Universitaria, 5000 Córdoba, Argentina
| | | | | | | | | | | | | |
Collapse
|
10
|
Eraso AJ, Inés A. Bacteriocin of Enterococcus from lactoserum able to cause oxidative stress in Staphylococcus aureus. Biochem Biophys Res Commun 2004; 314:897-901. [PMID: 14741721 DOI: 10.1016/j.bbrc.2003.12.179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The effect of a bacteriocin of Enterococcus on the oxidative metabolism of sensitive bacteria was investigated through the detection of oxidative stress by chemiluminescence (CL). The bacteriocin named EntB was purified to study the action on Staphylococcus aureus isolated from cosmetic. Chromatographic separation of EntB indicated different states of oligomerization with molecular weights multiple of 12,000Da monomeric form. The monomer purified by ion exchange was studied in its capacity to affect the oxidative metabolism of S. aureus, which showed increase of anion superoxide (O(2)(-)) when incubated with EntB. This effect was compared to the action of EntB on leukocytes as an assay of toxicity. EntB did not generate significant oxidative stress in leukocytes. Pyoverdin, a leukotoxic pigment of Pseudomonas fluorescens, was taken as reference, and it was found that this pigment caused similar oxidative stress to EntB in S. aureus; however, pyoverdin generated high production of anion superoxide (O(2)(-)) in leukocytes, while EntB did not increase the level of O(2)(-).
Collapse
Affiliation(s)
- Alberto Jorge Eraso
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Fisicoquímica y Naturales, Universidad Nacional de Río Cuarto, Argentina.
| | | |
Collapse
|
11
|
Picot L, Chevalier S, Mezghani-Abdelmoula S, Merieau A, Lesouhaitier O, Leroux P, Cazin L, Orange N, Feuilloley MGJ. Cytotoxic effects of the lipopolysaccharide from Pseudomonas fluorescens on neurons and glial cells. Microb Pathog 2003; 35:95-106. [PMID: 12927517 DOI: 10.1016/s0882-4010(03)00092-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Pseudomonas fluorescens is an emerging pathogen closely related to Pseudomonas aeruginosa. In the present study, the effect of the lipopolysaccharide (LPS) from P. fluorescens MF37 was investigated using indicators of apoptosis and necrosis and was compared to the effect of the LPS from P. aeruginosa PAO1. Capillary electrophoresis analysis of the LPS from P. fluorescens MF37 revealed the existence of three forms of the endotoxin and the absence of homology with the LPS from P. aeruginosa. In neurons and glial cells the LPS from P. fluorescens induced major morphological changes including a condensation of the cytoplasmic proteins, a leakage of the cytoplasmic content, the formation of blebs on the nuclear membrane and a marked reorganization of the cytoskeleton. In glial cells, the LPS from P. fluorescens provoked the migration of phosphatidylserine at the surface of the cytoplasmic membrane, a sign of apoptosis, but this reaction was associated to an increase in the permeability to propidium iodide characteristic of necrosis. Biochemical studies revealed an important activation of an inducible nitric oxide synthase and a release of lactate dehydrogenase, a stable cytosolic enzyme. These results demonstrate that the LPS from P. fluorescens induces apoptosis and a concomitant and limited necrosis, reveal the unexpected cytotoxicity of this endotoxin and provide the first demonstration of the apoptotic effect of a non-aeruginosa Pseudomonas on nerve cells.
Collapse
Affiliation(s)
- Laurent Picot
- Laboratory of Cold Microbiology, University of Rouen, UPRES 2123, 55 rue Saint Germain, 27000 Evreux, France
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Becerra MC, Eraso AJ, Albesa I. Comparison of oxidative stress induced by ciprofloxacin and pyoverdin in bacteria and in leukocytes to evaluate toxicity. LUMINESCENCE 2003; 18:334-40. [PMID: 14694423 DOI: 10.1002/bio.742] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Oxidative stress induced by ciprofloxacin and pyoverdin, a leukotoxic pigment, was studied by comparing their effect in bacteria and leukocytes. Chemiluminescence (CL) assays with lucigenin or luminol were adapted to measure the stimuli of superoxide anion (O2 -) and other reactive species of oxygen (ROS) in bacteria. Ciprofloxacin principally induced the production of O2 - in the three species studied: Staphylococcus aureus, Enterococcus faecalis and Escherichia coli. Lucigenin CL assay showed high oxidative stress in S. aureus due to its low superoxide dismutase (SOD) activity, whereas E. coli exhibited important SOD activity, responsible for little production of O2 - in absence or presence of ciprofloxacin. Reduction of nitroblue of tetrazolium (NBT) was applied. This assay indicated that there was higher oxidative stress in S. aureus and E. faecalis than in E. coli. The comparison of oxidative stress generated in bacteria and leukocytes was used to check the selective toxicity of ciprofloxacin in comparison with pyoverdin. Ciprofloxacin did not generate significant stimuli of O2 - in neutrophils, while pyoverdin duplicated the production of O2 -. CL and NBT were useful to study the leukotoxicity of ciprofloxacin. Oxidative stress caused by the antibiotic and the leukotoxic pigment was similar in bacteria.
Collapse
Affiliation(s)
- M C Becerra
- Departamento de Farmacia, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
| | | | | |
Collapse
|
13
|
Takano M, Meneshian A, Sheikh E, Yamakawa Y, Wilkins KB, Hopkins EA, Bulkley GB. Rapid upregulation of endothelial P-selectin expression via reactive oxygen species generation. Am J Physiol Heart Circ Physiol 2002; 283:H2054-61. [PMID: 12384485 DOI: 10.1152/ajpheart.01001.2001] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Endothelial cell ICAM-1 upregulation in response to TNF-alpha is mediated in part by reactive oxygen species (ROS) generated by the endothelial membrane-associated NADPH oxidase and occurs maximally after 4 h as the synthesis of new protein is required. However, thrombin-stimulated P-selectin upregulation is bimodal, the first peak occurring within minutes. We hypothesize that this early peak, which results from the release of preformed P-selectin from within Weibel-Palade bodies, is mediated in part by ROS generated from the endothelial membrane-associated xanthine oxidase. We found that this rapid expression of P-selectin on the surface of endothelial cells was accompanied by qualitatively parallel increases in ROS generation. Both P-selectin expression and ROS generation were inhibited, dose dependently, by the exogenous administration of disparate cell-permeable antioxidants and also by the inhibition of either of the known membrane-associated ROS-generating enzymes NADPH oxidase or xanthine oxidase. This rapid, posttranslational cell signaling response, mediated by ROS generated not only by the classical NADPH oxidase but also by xanthine oxidase, may well represent an important physiological trigger of the microvascular inflammatory response.
Collapse
Affiliation(s)
- Manabu Takano
- Department of Surgery, The Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287, USA
| | | | | | | | | | | | | |
Collapse
|