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Ryvchin R, Dubinsky V, Rabinowitz K, Wasserberg N, Dotan I, Gophna U. Alteration in Urease-producing Bacteria in the Gut Microbiomes of Patients with Inflammatory Bowel Diseases. J Crohns Colitis 2021; 15:2066-2077. [PMID: 34111242 DOI: 10.1093/ecco-jcc/jjab101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS Bacterial urease is a major virulence factor of human pathogens, and murine models have shown that it can contribute to the pathogenesis of inflammatory bowel diseases [IBD]. METHODS The distribution of urease-producing bacteria in IBD was assessed using public faecal metagenomic data from various cohorts, including non-IBD controls [n = 55], patients with Crohn's disease [n = 291] or ulcerative colitis [n = 214], and patients with a pouch [n = 53]. The ureA gene and the taxonomic markers gyrA, rpoB, and recA were used to estimate the percentage of urease producers in each sample. RESULTS Levels of urease producers in patients with IBD and non-IBD controls were comparable. In non-IBD controls and most IBD patients, urease producers were primarily acetate-producing genera such as Blautia and Ruminococcus. A shift in the type of the dominant urease producers towards Proteobacteria and Bacilli was observed in a subset of all IBD subtypes, which correlated with faecal calprotectin levels in one cohort. Some patients with IBD had no detectable urease producers. In patients with a pouch, the probiotic-associated species Streptococcus thermophilus was more common as a main urease producer than in other IBD phenotypes, and it generally did not co-occur with other Bacilli or with Proteobacteria. CONCLUSIONS Unlike all non-IBD controls, patients with IBD often showed a shift towards Bacilli or Proteobacteria or a complete loss of urease production. Probiotics containing the species S. thermophilus may have a protective effect against colonisation by undesirable urease-producing bacteria in a subset of patients with a pouch.
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Affiliation(s)
- Ron Ryvchin
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Vadim Dubinsky
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Keren Rabinowitz
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nir Wasserberg
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Division of Surgery, Rabin Medical Center, Petah-Tikva, Israel
| | - Iris Dotan
- Division of Gastroenterology, Rabin Medical Center, Petah-Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Uri Gophna
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
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Wang Q, Wang H, Jiang Y, Lv M, Wang X, Chen L. Biotransformation mechanism of Vibrio diabolicus to sulfamethoxazole at transcriptional level. JOURNAL OF HAZARDOUS MATERIALS 2021; 411:125023. [PMID: 33429311 DOI: 10.1016/j.jhazmat.2020.125023] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
Sulfamethoxazole (SMX) has attracted much attention due to its high probability of detection in the environment. Marine bacteria Vibrio diabolicus strain L2-2 has been proven to be able to transform SMX. In this study, the potential resistance and biotransformation mechanism of strain L2-2 to SMX, and key genes responses to SMX at environmental concentrations were researched. KEGG pathways were enriched by down-regulated genes including degradation of L-Leucine, L-Isoleucine, and fatty acid metabolism. Resistance mechanism could be concluded as the enhancement of membrane transport, antioxidation, response regulator, repair proteins, and ribosome protection. Biotransformation genes might involve in arylamine N-acetyltransferases (nat), cytochrome c553 (cyc-553) and acyl-CoA synthetase (acs). At the environmental concentration of SMX (0.1-10 μg/L), nat was not be activated, which meant the acetylation of SMX might not occur in the environment; however, cyc-553 was up-regulated under SMX stress of 1 μg/L, which indicated the hydroxylation of SMX could occur in the environment. Besides, the membrane transport and antioxidation of strain L2-2 could be activated under SMX stress of 10 μg/L. The results provided a better understanding of resistance and biotransformation of bacteria to SMX and would support related researches about the impacts of environmental antibiotics.
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Affiliation(s)
- Qiaoning Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongdan Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Yaru Jiang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Min Lv
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Xiaoyan Wang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China.
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Islam MN, Rauf A, Fahad FI, Emran TB, Mitra S, Olatunde A, Shariati MA, Rebezov M, Rengasamy KRR, Mubarak MS. Superoxide dismutase: an updated review on its health benefits and industrial applications. Crit Rev Food Sci Nutr 2021; 62:7282-7300. [PMID: 33905274 DOI: 10.1080/10408398.2021.1913400] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Many short-lived and highly reactive oxygen species, such as superoxide anion (O2-) and hydrogen peroxide (H2O2), are toxic or can create oxidative stress in cells, a response involved in the pathogenesis of numerous diseases depending on their concentration, location, and cellular conditions. Superoxide dismutase (SOD) activities as an endogenous and exogenous cell defense mechanism include the potential use in treating various diseases, improving the potential use in treating various diseases, and improving food-stuffs preparation dietary supplements human nutrition. Published work indicates that SOD regulates oxidative stress, lipid metabolism, inflammation, and oxidation in cells. It can prevent lipid peroxidation, the oxidation of low-density lipoprotein in macrophages, lipid droplets' formation, and the adhesion of inflammatory cells into endothelial monolayers. It also expresses antioxidant effects in numerous cancer-related processes. Additionally, different forms of SOD may also augment food processing and pharmaceutical applications, exhibit anticancer, antioxidant, and anti-inflammatory effects, and prevent arterial problems by protecting the proliferation of vascular smooth muscle cells. Many investigations in this review have reported the therapeutic ability and physiological importance of SOD. Because of their antioxidative effects, SODs are of great potential in the medicinal, cosmetic, food, farming and chemical industries. This review discusses the findings of human and animal studies that support the advantages of SOD enzyme regulations to reduce the formation of oxidative stress in various ways.
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Affiliation(s)
- Mohammad Nazmul Islam
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, Bangladesh
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Swabi, Pakistan
| | - Fowzul Islam Fahad
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, Bangladesh
| | - Talha Bin Emran
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong, Bangladesh
| | - Saikat Mitra
- Faculty of Pharmacy, Department of Pharmacy, University of Dhaka, Dhaka, Bangladesh
| | - Ahmed Olatunde
- Department of Biochemistry, Abubakar Tafawa Balewa University, Bauchi, Nigeria
| | - Mohammad Ali Shariati
- K.G. Razumovsky Moscow State University of Technologies and Management (the First Cossack University), Moscow, Russian Federation
| | - Maksim Rebezov
- V.M. Gorbatov Federal Research Center for Food Systems of Russian Academy of Sciences, Moscow, Russian Federation.,Prokhorov General Physics Institute of the Russian Academy of Science, Moscow, Russian Federation
| | - Kannan R R Rengasamy
- Green Biotechnologies Research Centre of Excellence, University of Limpopo, Polokwane, South Africa
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Martínez SR, Aiassa V, Sola C, Becerra MC. Oxidative stress response in reference and clinical Staphylococcus aureus strains under Linezolid exposure. J Glob Antimicrob Resist 2020; 22:257-262. [PMID: 32169679 DOI: 10.1016/j.jgar.2020.02.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 02/12/2020] [Accepted: 02/21/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA) strains are some of the most widespread pathogens with multi-resistant to antimicrobial agents (AA). AA provoke several changes inside bacteria, which cannot be solely explained by the main mechanisms of action reported. OBJECTIVE The role of oxidative stress in bacteria exposed to bacteriostatic AA has not been widely studied; hence, the aim of our work was to investigate the effect of linezolid (LZD) on S. aureus strains. METHODS Oxidative stress markers, such as superoxide dismutase (SOD) enzyme activity, the global antioxidant response, advanced oxidation protein products (AOPP) and basal levels of glutathione in 28 clinical and 2 reference strains were measured. RESULTS AND CONCLUSIONS We identified 10 of 30 strains showing a slight increase in reactive species under LZD treatment with respect to the untreated control (between 22% and 56%). Higher generation was detected in clinical strains compared with the reference strains; however, the impact on the antioxidant response was not significant, and the oxidized protein levels were almost undetectable. The strains exposed to this oxazolidinone did not suffer acute oxidative stress. This is the first work reporting the behaviour of clinical and reference strains of S. aureus exposed to LZD, showing negligible oxidative stress.
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Affiliation(s)
- Sol Romina Martínez
- InstitutoMultidisciplinario de Biología Vegetal (IMBIV), CONICET and Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina.
| | - Virginia Aiassa
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica (UNITEFA), CONICET and Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina.
| | - Claudia Sola
- Departamento Bioquímica Clínica, Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI) CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina.
| | - María Cecilia Becerra
- InstitutoMultidisciplinario de Biología Vegetal (IMBIV), CONICET and Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina.
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Dietary Supplementation of Probiotic Bacillus subtilis Affects Antioxidant Defenses and Immune Response in Grass Carp Under Aeromonas hydrophila Challenge. Probiotics Antimicrob Proteins 2020; 11:545-558. [PMID: 29654472 DOI: 10.1007/s12602-018-9409-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This study investigated whether Bacillus subtilis can provide protection for grass carp against oxidative stress damage induced by Aeromonas hydrophila. A total of 240 healthy grass carp (Ctenopharyngodon idellus) (average weight of 71.42 ± 4.36g) were randomly divided into four groups with three replicates: control group, A. hydrophila group, B. subtilis + A. hydrophila group, and A. hydrophila + B. subtilis group. After challenge with A. hydrophila, the lipid oxidative damage, antioxidant defenses, and the gene expression of inflammatory cytokines of the grass carp were investigated. Our results showed that A. hydrophila caused lipid oxidative damage, led to significant decreases in antioxidant defenses, and induced inflammatory responses of grass carp. However, the grass carp group fed the probiotic B. subtilis diet for 42 days before the challenge and the group fed the probiotic B. subtilis diet immediately after the challenge both showed (i) a reduced level of oxidative stress with a decrease in the level of MDA; (ii) an increase in antioxidant defenses, including an increase in total antioxidant capacity (T-AOC), increased activities of SOD and CAT, increased levels of GSH, and upregulated gene expression of antioxidant enzymes (SOD, CAT, and Gpx); and (iii) an improved immune response with the level of antiinflammatory cytokines IL-10 messenger RNA (mRNA) upregulated and the levels of pro-inflammatory cytokines TNF-α, IL-1β, and IL-8 mRNA downregulated. Based on this study, B. subtilis can provide effective protection of fish against oxidative stress damage induced by A. hydrophila infection.
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Lack of the Major Multifunctional Catalase KatA in Pseudomonas aeruginosa Accelerates Evolution of Antibiotic Resistance in Ciprofloxacin-Treated Biofilms. Antimicrob Agents Chemother 2019; 63:AAC.00766-19. [PMID: 31307984 DOI: 10.1128/aac.00766-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/30/2019] [Indexed: 01/20/2023] Open
Abstract
During chronic biofilm infections, Pseudomonas aeruginosa bacteria are exposed to increased oxidative stress as a result of the inflammatory response. As reactive oxygen species (ROS) are mutagenic, the evolution of resistance to ciprofloxacin (CIP) in biofilms under oxidative stress conditions was investigated. We experimentally evolved six replicate populations of P. aeruginosa lacking the major catalase KatA in colony biofilms and stationary-phase cultures for seven passages in the presence of subinhibitory levels (0.1 mg/liter) of CIP or without CIP (eight replicate lineages for controls) under aerobic conditions. In CIP-evolved biofilms, a larger CIP-resistant subpopulation was isolated in the ΔkatA strain than in the wild-type (WT) PAO1 population, suggesting oxidative stress as a promoter of the development of antibiotic resistance. A higher number of mutations identified by population sequencing were observed in evolved ΔkatA biofilm populations (CIP and control) than in WT PAO1 populations evolved under the same conditions. Genes involved in iron assimilation were found to be exclusively mutated in CIP-evolved ΔkatA biofilm populations, probably as a defense mechanism against ROS formation resulting from Fenton reactions. Furthermore, a hypermutable lineage due to mutL inactivation developed in one CIP-evolved ΔkatA biofilm lineage. In CIP-evolved biofilms of both the ΔkatA strain and WT PAO1, mutations in nfxB, the negative regulator of the MexCD-OprJ efflux pump, were observed while in CIP-evolved planktonic cultures of both the ΔkatA strain and WT PAO1, mutations in mexR and nalD, regulators of the MexAB-OprM efflux pump, were repeatedly found. In conclusion, these results emphasize the role of oxidative stress as an environmental factor that might increase the development of antibiotic resistance in in vivo biofilms.
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Zhang XG, Guan DL, Niu CG, Cao Z, Liang C, Tang N, Zhang L, Wen XJ, Zeng GM. Constructing magnetic and high-efficiency AgI/CuFe 2O 4 photocatalysts for inactivation of Escherichia coli and Staphylococcus aureus under visible light: Inactivation performance and mechanism analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 668:730-742. [PMID: 30865904 DOI: 10.1016/j.scitotenv.2019.03.068] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 03/05/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Magnetic materials usually exhibit advanced performance in many areas for their easy separating and recycle ability. In this study, silver iodide/copper ferrite (AgI/CuFe2O4) catalysts with excellent magnetic property were successfully synthesized and characterized by a series of techniques. Two typical bacteria Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were applied to estimate the photocatalytic inactivation performance of obtained AgI/CuFe2O4 catalysts. Results revealed that the AgI/CuFe2O4 (12.5% AgI) composite could absolutely inactivate 3 × 109 CFU/mL E. coli and 2.7 × 108 CFU/mL S. aureus cells severally in 50 min and 40 min under visible light irradiation, which showed a much higher photo-disinfection activity than monomers. Transmission electron microscopy was used to study the biocidal action of this nanocatalyst, the results confirmed that the treated E. coli cells were damaged, the nanocatalyst permeated into cells and resulting in death of cells. Besides, it was found that the destruction of bacterial membrane together with substantial leaked potassium ion (K+) which caused by the photo-generated reactive species superoxide radical (O2-) and holes (h+) could be the direct disinfection principles. For a deep insight into practical applications, the influences of different catalyst concentrations and reaction pH were also taken into discussion in details. The overall results indicated the novel photocatalyst with strong redox capacity and outstanding reusability can be widely employed in bacteria elimination.
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Affiliation(s)
- Xue-Gang Zhang
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
| | - Dan-Lin Guan
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
| | - Cheng-Gang Niu
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China.
| | - Zhong Cao
- School of Chemistry and Biological Engineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Chao Liang
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
| | - Ning Tang
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
| | - Lei Zhang
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
| | - Xiao-Ju Wen
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China
| | - Guang-Ming Zeng
- College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China.
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Chen Y, Wu F, Pang H, Tang J, Cai S, Jian J. Superoxide dismutase B (sodB), an important virulence factor of Vibrio alginolyticus, contributes to antioxidative stress and its potential application for live attenuated vaccine. FISH & SHELLFISH IMMUNOLOGY 2019; 89:354-360. [PMID: 30959182 DOI: 10.1016/j.fsi.2019.03.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/18/2019] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
Vibrio alginolyticus is an opportunistic and halophilic Gram-negative pathogen in limiting the development of aquatic industry and affecting human health. SODs are oxidative enzymes that play a critical role in oxidative defense. In this study, an in-frame deleted mutant strain (ΔsodB) was constructed by allelic exchange mutagenesis to investigate physiological role of sodB in pathogenicity of V. alginolyticus. The results exhibited that ΔsodB showed no differences in growth compared with wild-type strain HY9901 (WT), but led to increasing in biofilm formation, ECPase activity and sensitivity to hydrogen peroxide, decreasing in swarming motility, adherence to CIK cells, SOD activity and virulence. In addition, ΔsodB induced a high antibody titer and provided a valid protection with a relative percent survival value of 86.5% without inducing clinical symptoms after challenging with WT. These results suggest that sodB is important for normal physiological function, oxidation resistance and virulence in V. alginolyticus, and ΔsodB may be considered as an effective live attenuated vaccine against V. alginolyticus.
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Affiliation(s)
- Yanyan Chen
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China
| | - Fenglei Wu
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China
| | - Huanying Pang
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China
| | - Jufen Tang
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China
| | - Shuanghu Cai
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China.
| | - Jichang Jian
- Fisheries College of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China.
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Ciofu O, Tolker-Nielsen T. Tolerance and Resistance of Pseudomonas aeruginosa Biofilms to Antimicrobial Agents-How P. aeruginosa Can Escape Antibiotics. Front Microbiol 2019; 10:913. [PMID: 31130925 PMCID: PMC6509751 DOI: 10.3389/fmicb.2019.00913] [Citation(s) in RCA: 371] [Impact Index Per Article: 74.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/10/2019] [Indexed: 11/24/2022] Open
Abstract
Pseudomonas aeruginosa is one of the six bacterial pathogens, Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp., which are commonly associated with antimicrobial resistance, and denoted by their acronym ESKAPE. P. aeruginosa is also recognized as an important cause of chronic infections due to its ability to form biofilms, where the bacteria are present in aggregates encased in a self-produced extracellular matrix and are difficult or impossible to eradicate with antibiotic treatment. P. aeruginosa causes chronic infections in the lungs of patients with cystic fibrosis and chronic obstructive lung disease, as well as chronic urinary tract infections in patients with permanent bladder catheter, and ventilator-associated pneumonia in intubated patients, and is also an important pathogen in chronic wounds. Antibiotic treatment cannot eradicate these biofilm infections due to their intrinsic antibiotic tolerance and the development of mutational antibiotic resistance. The tolerance of biofilms to antibiotics is multifactorial involving physical, physiological, and genetic determinants, whereas the antibiotic resistance of bacteria in biofilms is caused by mutations and driven by the repeated exposure of the bacteria to high levels of antibiotics. In this review, both the antimicrobial tolerance and the development of resistance to antibiotics in P. aeruginosa biofilms are discussed. Possible therapeutic approaches based on the understanding of the mechanisms involved in the tolerance and resistances of biofilms to antibiotics are also addressed.
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Affiliation(s)
- Oana Ciofu
- Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, Costerton Biofilm Center, University of Copenhagen, Copenhagen, Denmark
| | - Tim Tolker-Nielsen
- Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, Costerton Biofilm Center, University of Copenhagen, Copenhagen, Denmark
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Zhang M, Yan Q, Mao L, Wang S, Huang L, Xu X, Qin Y. KatG plays an important role in Aeromonas hydrophila survival in fish macrophages and escape for further infection. Gene 2018; 672:156-164. [DOI: 10.1016/j.gene.2018.06.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 05/22/2018] [Accepted: 06/11/2018] [Indexed: 10/14/2022]
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S. K, Raghavan V. Isolation and characterization of marine biofilm forming bacteria from a ship’s hull. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s11515-018-1496-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kosman DJ. The teleos of metallo-reduction and metallo-oxidation in eukaryotic iron and copper trafficking. Metallomics 2018; 10:370-377. [PMID: 29484341 DOI: 10.1039/c8mt00015h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Eukaryotic cells, whether free-living or organismal, rely on metallo-reductases to process environmental ferric iron and cupric copper prior to uptake. In addition, some free-living eukaryotes (e.g. fungi and algae) couple ferri-reduction to ferro-oxidation, a process catalyzed by a small cohort of multi-copper oxidases; in these organisms, the ferric iron product is a ligand for cell iron uptake via a ferric iron permease. In addition to their support of iron uptake in lower eukaryotes, ferroxidases support ferrous iron efflux in Chordata; in this process the release of the ferrous iron from the efflux transporter is catalyzed by its ferroxidation. Last, ferroxidases also catalyze the oxidation of cuprous copper and, as metallo-oxidases, mirror the dual activity of the metallo-reductases. This Perspective examines the teleos of the yin-yang of this redox cycling of iron and copper in their metabolism.
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Affiliation(s)
- Daniel J Kosman
- Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, The University at Buffalo, Farber Hall Room 140, 3435 Main St., Buffalo, NY 14214-3000, USA.
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Mechanism of antagonistic effects of Andrographis paniculata methanolic extract against Staphylococcus aureus. ASIAN PAC J TROP MED 2017; 10:685-695. [DOI: 10.1016/j.apjtm.2017.07.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 05/17/2017] [Accepted: 06/23/2017] [Indexed: 11/19/2022] Open
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14
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Bertrand L, Monferrán MV, Mouneyrac C, Bonansea RI, Asis R, Amé MV. Sensitive biomarker responses of the shrimp Palaemonetes argentinus exposed to chlorpyrifos at environmental concentrations: Roles of alpha-tocopherol and metallothioneins. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 179:72-81. [PMID: 27588703 DOI: 10.1016/j.aquatox.2016.08.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/15/2016] [Accepted: 08/23/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to evaluate the toxic effects of chlorpyrifos (CPF) at environmental concentrations on the shrimp Palaemonetes argentinus, a South American native species. Organisms were exposed to environmentally relevant concentrations of CPF (from 3.5 to 94.5ngCPFL(-1)) at laboratory conditions for 96h. A wide battery of biochemical responses including bioaccumulation, damage and defense biomarkers were measured in cephalothorax and abdomen of shrimp. The concentration of CPF was below the detection limit of the method in both body sectors (8ngCPFg(-1)ww), probably indicating fast biotransformation of the parental compound. Our results showed that CPF exposure inhibits acetylcholinesterase activity from 3.5ngCPFL(-1), a concentration below the suggested Argentinean guidelines for the protection of aquatic biota. Moreover, oxidative stress was evidenced by increased H2O2 content and increased levels of TBARs and carbonyl groups in proteins. The induction of antioxidant enzymes like catalase, glutathione S-transferase and glutathione peroxidase seems not be sufficient to prevent oxidative damages. In addition, the mobilization of α-tocopherol from abdomen to cephalothorax was observed and reported for the first time in non-reproductive condition. Likewise, a strong diminution of metallothioneins occurred in cephalothorax from the lowest CPF concentration while induction occurred from the same treatment in abdomen as an oxidative stress response. Finally, significant correlation between Integrated Biomarker Response values and exposure concentrations suggest the usefulness of P. argentinus as bioindicator of CPF exposure at concentrations as low as environmental ones.
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Affiliation(s)
- Lidwina Bertrand
- Centro de Investigaciones en Bioquímica Clínica e Inmunología-CIBICI, Facultad de Ciencias Químicas, CONICET, UNC, Haya de la Torre esq., Medina Allende, 5000 Córdoba, Argentina
| | - Magadalena Victoria Monferrán
- Instituto de Ciencia y Tecnología de Alimentos Córdoba-ICYTAC, Facultad de Ciencias Químicas, CONICET, UNC, Av. Juan Filloy s/n, Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Catherine Mouneyrac
- Université Catholique de l'Ouest, MMS EA2160, LUNAM Université, 3 Place André Leroy, BP10808, 49008 Angers Cedex 01, France
| | - Rocio Inés Bonansea
- Centro de Investigaciones en Bioquímica Clínica e Inmunología-CIBICI, Facultad de Ciencias Químicas, CONICET, UNC, Haya de la Torre esq., Medina Allende, 5000 Córdoba, Argentina
| | - Ramón Asis
- Centro de Investigaciones en Bioquímica Clínica e Inmunología-CIBICI, Facultad de Ciencias Químicas, CONICET, UNC, Haya de la Torre esq., Medina Allende, 5000 Córdoba, Argentina
| | - María Valeria Amé
- Centro de Investigaciones en Bioquímica Clínica e Inmunología-CIBICI, Facultad de Ciencias Químicas, CONICET, UNC, Haya de la Torre esq., Medina Allende, 5000 Córdoba, Argentina.
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15
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Van Acker H, Gielis J, Acke M, Cools F, Cos P, Coenye T. The Role of Reactive Oxygen Species in Antibiotic-Induced Cell Death in Burkholderia cepacia Complex Bacteria. PLoS One 2016; 11:e0159837. [PMID: 27438061 PMCID: PMC4954720 DOI: 10.1371/journal.pone.0159837] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 07/08/2016] [Indexed: 11/19/2022] Open
Abstract
It was recently proposed that bactericidal antibiotics, besides through specific drug-target interactions, kill bacteria by a common mechanism involving the production of reactive oxygen species (ROS). However, this mechanism involving the production of hydroxyl radicals has become the subject of a lot of debate. Since the contribution of ROS to antibiotic mediated killing most likely depends on the conditions, differences in experimental procedures are expected to be at the basis of the conflicting results. In the present study different methods (ROS specific stainings, gene-expression analyses, electron paramagnetic resonance, genetic and phenotypic experiments, detection of protein carbonylation and DNA oxidation) to measure the production of ROS upon antibiotic treatment in Burkholderia cepacia complex (Bcc) bacteria were compared. Different classes of antibiotics (tobramycin, ciprofloxacin, meropenem) were included, and both planktonic and biofilm cultures were studied. Our results indicate that some of the methods investigated were not sensitive enough to measure antibiotic induced production of ROS, including the spectrophotometric detection of protein carbonylation. Secondly, other methods were found to be useful only in specific conditions. For example, an increase in the expression of OxyR was measured in Burkholderia cenocepacia K56-2 after treatment with ciprofloxacin or meropenem (both in biofilms and planktonic cultures) but not after treatment with tobramycin. In addition results vary with the experimental conditions and the species tested. Nevertheless our data strongly suggest that ROS contribute to antibiotic mediated killing in Bcc species and that enhancing ROS production or interfering with the protection against ROS may form a novel strategy to improve antibiotic treatment.
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Affiliation(s)
- Heleen Van Acker
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium
| | - Jan Gielis
- Department of Thoracic Surgery, Antwerp Surgical Training and Anatomy Research Centre (ASTARC), Antwerp University, Antwerp, Belgium
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Antwerp, Belgium
| | - Marloes Acke
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium
| | - Freya Cools
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Antwerp, Belgium
| | - Paul Cos
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Antwerp, Belgium
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium
- * E-mail:
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16
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Alvarez-Lorenzo C, Garcia-Gonzalez CA, Bucio E, Concheiro A. Stimuli-responsive polymers for antimicrobial therapy: drug targeting, contact-killing surfaces and competitive release. Expert Opin Drug Deliv 2016; 13:1109-19. [PMID: 27074830 DOI: 10.1080/17425247.2016.1178719] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Polymers can be designed to modify their features as a function of the level and nature of the surrounding microorganisms. Such responsive polymers can endow drug delivery systems and drug-medical device combination products with improved performance against intracellular infections and biofilms. AREAS COVERED Knowledge on microorganism growth environment outside and inside cells and formation of biofilm communities on biological and synthetic surfaces, together with advances in materials science and drug delivery are prompting strategies with improved efficacy and safety compared to traditional systemic administration of antimicrobial agents. This review deals with antimicrobial strategies that rely on: (i) polymers that disintegrate or undergo phase-transitions in response to changes in enzymes, pH and pO2 associated to microorganism growth; (ii) stimuli-responsive polymers that expose contact-killing groups when microorganisms try to adhere; and (iii) bioinspired polymers that recognize microorganisms for triggered (competitive/affinity-driven) drug release. EXPERT OPINION Prophylaxis and treatment of infections may benefit from polymers that are responsive to the unique changes that microbial growth causes in the surrounding environment or that even recognize the microorganism itself or its quorum sensing signals. These polymers may offer novel tools for the design of macrophage-, bacteria- and/or biofilm-targeted nanocarriers as well as of medical devices with switchable antibiofouling properties.
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Affiliation(s)
- Carmen Alvarez-Lorenzo
- a Departamento de Farmacia y Tecnología Farmacéutica , Universidade de Santiago de Compostela , Santiago de Compostela , Spain
| | - Carlos A Garcia-Gonzalez
- a Departamento de Farmacia y Tecnología Farmacéutica , Universidade de Santiago de Compostela , Santiago de Compostela , Spain
| | - Emilio Bucio
- b Departamento de Química de Radiaciones y Radioquímica , Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria , México DF , Mexico
| | - Angel Concheiro
- a Departamento de Farmacia y Tecnología Farmacéutica , Universidade de Santiago de Compostela , Santiago de Compostela , Spain
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Martínez SR, Miana GE, Albesa I, Mazzieri MR, Becerra MC. Evaluation of Antibacterial Activity and Reactive Species Generation of N-Benzenesulfonyl Derivatives of Heterocycles. Chem Pharm Bull (Tokyo) 2016; 64:135-41. [PMID: 26833442 DOI: 10.1248/cpb.c15-00682] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two N-benzenesulfonyl (BS) derivatives of 1,2,3,4-tetrahydroquinoline (THQ) were designed, prepared, and screened for antibacterial activity. This approach was based on combining the two privileged structures, BS and THQ, which are known to be active. The objective of this study was to evaluate the antibacterial activity of BS-THQ and its analogue 4-NH2BS-THQ, and to investigate the roles of reactive oxygen species and reactive nitrogen species in their lethality. Both showed bactericidal activity against Staphylococcus aureus ATCC 29213 and methicillin-resistant S. aureus (MRSA) ATCC 43300, with transmission electron microscopy revealing a disturbed membrane architecture. Furthermore, an increase of reactive oxygen species (ROS) in strains treated with BS-THQ with respect to the control was detected when fluorescent microscopy and spectrophotometric techniques were used. The analogue 4-NH2BS-THQ demonstrated a broader spectrum of activity than BS-THQ, with a minimum inhibitory concentration of 100 µg/mL against reference strains of S. aureus, Escherichia coli and Pseudomonas aeruginosa. The assayed compounds represent promising structures for the development of new synthetic classes of antimicrobials.
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Affiliation(s)
- Sol Romina Martínez
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba
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18
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García CA, Alcaraz ES, Franco MA, Passerini de Rossi BN. Iron is a signal for Stenotrophomonas maltophilia biofilm formation, oxidative stress response, OMPs expression, and virulence. Front Microbiol 2015; 6:926. [PMID: 26388863 PMCID: PMC4559654 DOI: 10.3389/fmicb.2015.00926] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 08/21/2015] [Indexed: 12/26/2022] Open
Abstract
Stenotrophomonas maltophilia is an emerging nosocomial pathogen. In many bacteria iron availability regulates, through the Fur system, not only iron homeostasis but also virulence. The aim of this work was to assess the role of iron on S. maltophilia biofilm formation, EPS production, oxidative stress response, OMPs regulation, quorum sensing (QS), and virulence. Studies were done on K279a and its isogenic fur mutant F60 cultured in the presence or absence of dipyridyl. This is the first report of spontaneous fur mutants obtained in S. maltophilia. F60 produced higher amounts of biofilms than K279a and CLSM analysis demonstrated improved adherence and biofilm organization. Under iron restricted conditions, K279a produced biofilms with more biomass and enhanced thickness. In addition, F60 produced higher amounts of EPS than K279a but with a similar composition, as revealed by ATR-FTIR spectroscopy. With respect to the oxidative stress response, MnSOD was the only SOD isoenzyme detected in K279a. F60 presented higher SOD activity than the wt strain in planktonic and biofilm cultures, and iron deprivation increased K279a SOD activity. Under iron starvation, SDS-PAGE profile from K279a presented two iron-repressed proteins. Mass spectrometry analysis revealed homology with FepA and another putative TonB-dependent siderophore receptor of K279a. In silico analysis allowed the detection of potential Fur boxes in the respective coding genes. K279a encodes the QS diffusible signal factor (DSF). Under iron restriction K279a produced higher amounts of DSF than under iron rich condition. Finally, F60 was more virulent than K279a in the Galleria mellonella killing assay. These results put in evidence that iron levels regulate, likely through the Fur system, S. maltophilia biofilm formation, oxidative stress response, OMPs expression, DSF production and virulence.
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Affiliation(s)
- Carlos A García
- Cátedra de Microbiología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires Buenos Aires, Argentina
| | - Eliana S Alcaraz
- Cátedra de Microbiología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires Buenos Aires, Argentina
| | - Mirta A Franco
- Cátedra de Microbiología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires Buenos Aires, Argentina
| | - Beatriz N Passerini de Rossi
- Cátedra de Microbiología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires Buenos Aires, Argentina
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19
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Colletta A, Wu J, Wo Y, Kappler M, Chen H, Xi C, Meyerhoff ME. S-Nitroso- N-acetylpenicillamine (SNAP) Impregnated Silicone Foley Catheters: A Potential Biomaterial/Device To Prevent Catheter-Associated Urinary Tract Infections. ACS Biomater Sci Eng 2015; 1:416-424. [PMID: 26462294 PMCID: PMC4593359 DOI: 10.1021/acsbiomaterials.5b00032] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/27/2015] [Indexed: 01/26/2023]
Abstract
![]()
Urinary Foley catheters are utilized
for management of hospitalized
patients and are associated with high rates of urinary tract infections
(UTIs). Nitric oxide (NO) potently inhibits microbial biofilm formation,
which is the primary cause of catheter associated UTIs (CAUTIs). Herein,
commercial silicone Foley catheters are impregnated via a solvent
swelling method with S-nitroso-N-acetyl-D-penicillamine (SNAP), a synthetic NO donor that exhibits
long-term NO release and stability when incorporated into low water-uptake
polymers. The proposed catheters generate NO surface-fluxes >0.7
×
10–10 mol min–1 cm–2 for over one month under physiological conditions, with minimal
SNAP leaching. These biomedical devices are demonstrated to significantly
decrease formation of biofilm on the surface of the catheter tubings
over 3, 7, and 14 day periods by microbial species (Staphylococcus
epidermidis and Proteus mirabilis) commonly
causing CAUTIs. Toxicity assessment demonstrates that the SNAP-impregnated
catheters are fully biocompatible, as extracts of the catheter tubings
score 0 on a 3-point grading scale using an accepted mouse fibroblast
cell-line toxicity model. Consequently, SNAP-impregnated silicone
Foley catheters can likely provide an efficient strategy to greatly
reduce the occurrence of nosocomial CAUTIs.
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Affiliation(s)
- Alessandro Colletta
- Department of Chemistry and Department of Environmental Health Sciences, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Jianfeng Wu
- Department of Chemistry and Department of Environmental Health Sciences, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Yaqi Wo
- Department of Chemistry and Department of Environmental Health Sciences, University of Michigan , Ann Arbor, Michigan 48109, United States
| | | | - Hao Chen
- Biocrede Inc. , Plymouth, Michigan 48170, United States
| | - Chuanwu Xi
- Department of Chemistry and Department of Environmental Health Sciences, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Mark E Meyerhoff
- Department of Chemistry and Department of Environmental Health Sciences, University of Michigan , Ann Arbor, Michigan 48109, United States
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20
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Van Acker H, Van Dijck P, Coenye T. Molecular mechanisms of antimicrobial tolerance and resistance in bacterial and fungal biofilms. Trends Microbiol 2014; 22:326-33. [PMID: 24598086 DOI: 10.1016/j.tim.2014.02.001] [Citation(s) in RCA: 326] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 01/28/2014] [Accepted: 02/03/2014] [Indexed: 12/22/2022]
Abstract
The formation of microbial biofilms is an important reason for failure of antimicrobial therapy. However, the molecular mechanisms underlying the survival of biofilm cells are still not completely understood. In this review we discuss three mechanisms that play an important role in biofilm survival: (i) biofilm-specific protection against oxidative stress; (ii) biofilm-specific expression of efflux pumps; and (iii) protection provided by matrix polysaccharides. We demonstrate that these mechanisms are found both in bacterial and fungal biofilms and are often surprisingly similar between distantly related organisms. In addition, we give an overview of the data that suggests that these mechanisms may not be independent.
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Affiliation(s)
- Heleen Van Acker
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium
| | - Patrick Van Dijck
- Department of Molecular Microbiology, Vlaams Instituut voor Biotechnologie (VIB), Leuven, Belgium; Laboratory of Molecular Cell Biology, KU Leuven, Leuven, Belgium
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium.
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21
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Shikh-Bardsiri H, Shakibaie MR. Antibiotic resistance pattern among biofilm producing and non producing Proteus strains isolated from hospitalized patients; matter of hospital hygiene and antimicrobial stewardship. Pak J Biol Sci 2013; 16:1496-502. [PMID: 24511691 DOI: 10.3923/pjbs.2013.1496.1502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A retrospective study on antimicrobial susceptibility and biofilm production were carried out for eighty eight strains of Proteus strains isolated from UTI and other hospital samples during April 2011-April 2012. The antibiotic susceptibility was carried out by Kirby-Bauer disk diffusion and MIC by E-test. Biofilm production was measured by microtiter method and confirmed by Scanning electron microscopy. Plasmids from biofilm producing isolates were detected by alkaline lysis technique. From 88 patients infected by proteus species, 58% were female and 42% were mail. The most frequent age range was 20-29 (77.39%) and the least were 60-69 years old (3.4%) (p = 0.05). Eighty one isolates were identified as P. mirabilis while, 7 identified as P. vulgaris. 67.04% [n = 59] of the isolates showed MIC range (16-32 +/- 0.05 microg mL(-1)) to ceftriaxone, 46.59% [n = 41] exhibited least MIC range to chloramphenicol (8-64 +/- 0.08 microg mL(-1)). 31% [n = 28] of the isolates also exhibited MIC range 1-4 microg mL(-1) to ciprofloxacin. 17% [n = 15] of the isolates exhibited strong biofilm while, 6% [n = 6] did not show any biofilm (p < or = 0.05). Plasmid isolation from biofilm producing isolates revealed that stains number 19, 24 and 87' that produced strong biofilm carried similar high M. Wt. plasmid. From above results it can be concluded that the majority of Proteus isolated from UTI patients were belong to P. mirabilis. Ciprofloxacin was the most effective antibiotic for treatment of the infected patients. Limited number of the isolates could produce strong biofilm that were bearing plasmids. Majority of the biofilm producing isolates were also resistance at least to 4 antibiotics routinely prescribed in our hospital.
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Affiliation(s)
- Houshang Shikh-Bardsiri
- Department of Microbiology and Immunology, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Reza Shakibaie
- Department of Microbiology and Immunology, Kerman University of Medical Sciences, Kerman, Iran
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22
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Relevance of biofilms in the pathogenesis of Shiga-toxin-producing Escherichia coli infection. ScientificWorldJournal 2013; 2013:607258. [PMID: 24324376 PMCID: PMC3845835 DOI: 10.1155/2013/607258] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 09/25/2013] [Indexed: 11/17/2022] Open
Abstract
The present study was designed to determine the relationships among biofilm formation, cellular stress and release of Shiga toxin (Stx) by three different clinical Shiga toxin-producing Escherichia coli (STEC) strains. The biofilm formation was determined using crystal violet stain in tryptic soy broth or thioglycollate medium with the addition of sugars (glucose or mannose) or hydrogen peroxide. The reactive oxygen species (ROSs) were detected by the reduction of nitro blue tetrazolium and reactive nitrogen intermediates (RNI) determined by the Griess assay. In addition, the activities of two antioxidant enzymes, superoxide dismutase (SOD) and catalase (CAT), were studied. For the cytotoxicity studies, Vero cells were cultured with Stx released of STEC biofilms. The addition of sugars in both culture mediums resulted in an increase in biofilm biomass, with a decrease in ROS and RNI production, low levels of SOD and CAT activity, and minimal cytotoxic effects. However, under stressful conditions, an important increase in the antioxidant enzyme activity and high level of Stx production were observed. The disturbance in the prooxidant-antioxidant balance and its effect on the production and release of Stx evaluated under different conditions of biofilm formation may contribute to a better understanding of the relevance of biofilms in the pathogenesis of STEC infection.
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Macromolecular Oxidation in Planktonic Population and Biofilms of Proteus mirabilis Exposed to Ciprofloxacin. Cell Biochem Biophys 2013; 68:49-54. [DOI: 10.1007/s12013-013-9693-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Impact of ciprofloxacin and chloramphenicol on the lipid bilayer of Staphylococcus aureus: changes in membrane potential. BIOMED RESEARCH INTERNATIONAL 2013; 2013:276524. [PMID: 23762834 PMCID: PMC3676981 DOI: 10.1155/2013/276524] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/16/2013] [Accepted: 05/07/2013] [Indexed: 11/18/2022]
Abstract
The present study was undertaken to explore the interaction of ciprofloxacin and chloramphenicol with bacterial membranes in a sensitive and in a resistant strains of Staphylococcus aureus by using 1-anilino-8-naphthalene sulfonate (ANS). The binding of this probe to the cell membrane depends on the surface potential, which modulates the binding constant to the membrane. We observed that these antibiotics interacted with the bilayer, thus affecting the electrostatic surface potential. Alterations caused by antibiotics on the surface of the bacteria were accompanied by a reduction in the number of binding sites and an increase in the ANS dissociation constant in the sensitive strain, whereas in the ciprofloxacin-resistant strain no significant changes were detected. The changes seen in the electrostatic surface potential generated in the membrane of S. aureus by the antibiotics provide new aspects concerning their action on the bacterial cell.
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25
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Baronetti JL, Villegas NA, Aiassa V, Paraje MG, Albesa I. Hemolysin from Escherichia coli induces oxidative stress in blood. Toxicon 2013; 70:15-20. [PMID: 23567037 DOI: 10.1016/j.toxicon.2013.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 03/11/2013] [Accepted: 03/18/2013] [Indexed: 02/05/2023]
Abstract
Hemolysin (HlyA) produced by some stains of Escherichia coli is considered to be an important virulence factor of those bacteria. On the other hand, reactive oxygen species (ROS) have been reported to be involved in the pathogenesis of different diseases via oxidative stress generation. The purpose of this study was to analyze the capacity of HlyA to induce oxidative stress in whole blood cultures (WBCs). To this end, ROS production, the damage induced in lipids and proteins, and the antioxidant defense system was evaluated in blood cultures exposed to low concentrations of HlyA. We found that HlyA increased the level of free radicals detected by chemiluminescence assay. Moreover, lipid peroxidation and protein damage was significantly increased in cultures treated with HlyA in comparation with those found in control cultures. On the other hand, a decrease in total antioxidant capacity of plasma and in the activity of superoxide dismutase (SOD) was observed in plasma from blood treated with HlyA. Collectively, our data demonstrate that low concentrations of E. coli hemolysin induced oxidative stress in WBCs with the induction of different oxidative damage biomarkers.
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Affiliation(s)
- José Luis Baronetti
- Department of Pharmacy, IMBIV-CONICET, Faculty of Chemical Sciences, National University of Córdoba, Haya de la Torre y Medina Allende, University Campus, 5000 Córdoba, Argentina
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26
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Suo Y, Huang Y, Liu Y, Shi C, Shi X. The expression of superoxide dismutase (SOD) and a putative ABC transporter permease is inversely correlated during biofilm formation in Listeria monocytogenes 4b G. PLoS One 2012; 7:e48467. [PMID: 23119031 PMCID: PMC3485238 DOI: 10.1371/journal.pone.0048467] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 09/25/2012] [Indexed: 11/19/2022] Open
Abstract
Little is known about the molecular basis of biofilm formation in Listeria monocytogenes. The superoxide dismutase (SOD) of the deletion mutant of lm.G_1771 gene, which encodes for a putative ABC transporter permease, is highly expressed in biofilm. In this study, the sod gene deletion mutant Δsod, and double deletion mutant of the sod and lm. G_1771 genes Δ1771Δsod were used to investigate the role of SOD and its relationship to the expression of the putative ABC transporter permease in biofilm formation. Our results showed that the ability to form a biofilm was significantly reduced in the Δsod mutant and the Δ1771Δsod double mutant. Both Δsod and Δ1771Δsod mutants exhibited slow growth phenotypes and produced more reactive oxygen species (ROS). The growth was inhibited in the mutants by methyl viologen (MV, internal oxygen radical generator) treatment. In addition, the expression of one oxidation resistance gene (kat), two stress regulators encoding genes (perR and sigB), and one DNA repair gene (recA) were analyzed in both the wild-type L. monocytogenes 4b G and the deletion mutants by RT-qPCR. The expression levels of the four genes were increased in the deletion mutants when biofilms were formed. Taken together, our data indicated that SOD played an important role in biofilm formation through coping with the oxidant burden in deficient antioxidant defenses.
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Affiliation(s)
- Yujuan Suo
- MOST-USDA Joint Research Center for Food Safety and Bor Luh Food Safety Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Yanyan Huang
- MOST-USDA Joint Research Center for Food Safety and Bor Luh Food Safety Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Yanhong Liu
- Molecular Characterization of Foodborne Pathogens Research Unit, Eastern Regional Research Center, Agricultural Research Service, U. S. Department of Agriculture, Wyndmoor, Pennsylvania, United States of America
| | - Chunlei Shi
- MOST-USDA Joint Research Center for Food Safety and Bor Luh Food Safety Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Xianming Shi
- MOST-USDA Joint Research Center for Food Safety and Bor Luh Food Safety Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
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Nosocomial and community acquired uropathogenic isolates of Proteus mirabilis and antimicrobial susceptibility profiles at a university hospital in Sub–Saharan Africa. ASIAN PACIFIC JOURNAL OF TROPICAL DISEASE 2012. [DOI: 10.1016/s2222-1808(12)60003-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Wasfi R, El-Rahman OAA, Mansour LE, Hanora AS, Hashem AM, Ashour MS. Antimicrobial activities against biofilm formed by Proteus mirabilis isolates from wound and urinary tract infections. Indian J Med Microbiol 2012; 30:76-80. [DOI: 10.4103/0255-0857.93044] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Aiassa V, Barnes AI, Smania AM, Albesa I. Sublethal ciprofloxacin treatment leads to resistance via antioxidant systems in Proteus mirabilis. FEMS Microbiol Lett 2011; 327:25-32. [DOI: 10.1111/j.1574-6968.2011.02453.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Revised: 10/26/2011] [Accepted: 10/31/2011] [Indexed: 12/26/2022] Open
Affiliation(s)
- Virginia Aiassa
- Departamento de Farmacia; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Córdoba; Argentina
| | - Ana I. Barnes
- Departamento de Farmacia; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Córdoba; Argentina
| | - Andrea M. Smania
- Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC); CONICET; Departamento de Química Biológica; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Córdoba; Argentina
| | - Inés Albesa
- Departamento de Farmacia; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Córdoba; Argentina
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Páez PL, Becerra MC, Albesa I. Comparison of Macromolecular Oxidation by Reactive Oxygen Species in Three Bacterial Genera Exposed to Different Antibiotics. Cell Biochem Biophys 2011; 61:467-72. [DOI: 10.1007/s12013-011-9227-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Arce Miranda JE, Sotomayor CE, Albesa I, Paraje MG. Oxidative and nitrosative stress in Staphylococcus aureus biofilm. FEMS Microbiol Lett 2010; 315:23-9. [DOI: 10.1111/j.1574-6968.2010.02164.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Inbakandan D, Murthy PS, Venkatesan R, Khan SA. 16S rDNA sequence analysis of culturable marine biofilm forming bacteria from a ship's hull. BIOFOULING 2010; 26:893-899. [PMID: 21038149 DOI: 10.1080/08927014.2010.530347] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Marine bacteria from the hull of a ship in the form of biofilms or microfouling were isolated, cultured, and identified by phylogenetic analysis using 16S rDNA sequences. With an average length of 946 bp, all the 16 sequences were classified using the Ribosomal database project (RDP) and were submitted to the National Center for Biotechnology Information. Phylogenetic analysis using 16S rDNA sequences indicated that the 16 strains belonged to the Firmicutes (IK-MB6 Exiguobacterium aurantiacum, IK-MB7 Exiguobacterium arabatum, IK-MB8 Exiguobacterium arabatum, IK-MB9 Jeotgalibacillus alimentarius, IK-MB10 Bacillus megaterium, IK-MB11 Bacillus pumilus, IK-MB12 Bacillus pumilus, IK-MB13 Bacillus pumilus, IK-MB14 Bacillus megaterium), High GC, Gram-positive bacteria (IK-MB2 Micrococcus luteus, IK-MB5 Micrococcus luteus, IK-MB16 Arthrobacter mysorens), G-Proteobacteria (IK-MB3 Halomonas aquamarina, IK-MB15 Halotalea alkalilenta), CFB group bacteria (IK-MB1 Myroides odoratimimus), and Enterobacteria (IK-MB4 Proteus mirabilis). Among the 16 strains, representatives of the Firmicutes were dominant (56.25%) compared to the high GC, Gram-positive bacteria (18.75%), G-Proteobacteria (12.5%), CFB group bacteria (6.25%), and Enterobacteria (6.25%). Analysis revealed that majority of marine species found in marine biofilm are of anthropogenic origin.
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Affiliation(s)
- D Inbakandan
- Centre for Ocean Research, Sathyabama University, Chennai, India.
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Stress induced cross-protection against environmental challenges on prokaryotic and eukaryotic microbes. World J Microbiol Biotechnol 2010; 27:1281-96. [PMID: 25187127 DOI: 10.1007/s11274-010-0584-3] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Accepted: 09/20/2010] [Indexed: 02/07/2023]
Abstract
Prokaryotic and eukaryotic microbes thrive successfully in stressful environments such as high osmolarity, acidic or alkali, solar heat and u.v. radiation, nutrient starvation, oxidative stress, and several others. To live under these continuous stress conditions, these microbes must have mechanisms to protect their proteins, membranes, and nucleic acids, as well as other mechanisms that repair nucleic acids. The stress responses in bacteria are controlled by master regulators, which include alternative sigma factors, such as RpoS and RpoH. The sigma factor RpoS integrates multiple signals, such as the general stress response regulators and the sigma factor RpoH regulates the heat shock proteins. These response pathways extensively overlap and are induced to various extents by the same environmental stresses. In eukaryotes, two major pathways regulate the stress responses: stress proteins, termed heat shock proteins (HSP), which appear to be required only for growth during moderate stress, and stress response elements (STRE), which are induced by different stress conditions and these elements result in the acquisition of a tolerant state towards any stress condition. In this review, the mechanisms of stress resistance between prokaryotic and eukaryotic microbes will be described and compared.
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Bafana A, Dutt S, Kumar S, Ahuja PS. Superoxide dismutase: an industrial perspective. Crit Rev Biotechnol 2010; 31:65-76. [DOI: 10.3109/07388551.2010.490937] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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