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Chen Z, Xiong Y, Tang Y, Zhao Y, Chen J, Zheng J, Wu Y, Deng Q, Qu D, Yu Z. In vitro activities of thiazolidione derivatives combined with daptomycin against clinical Enterococcus faecium strains. BMC Microbiol 2022; 22:16. [PMID: 34996348 PMCID: PMC8740470 DOI: 10.1186/s12866-021-02423-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 12/06/2021] [Indexed: 11/19/2022] Open
Abstract
Background Previous reports have demonstrated two thiazolidione derivatives (H2-60 and H2-81) can robustly inhibit the planktonic growth and biofilm formation of S. epidermidis and S. aureus by targeting the histidine kinase YycG. Whereas the antibacterial and anti-biofilm activity of these two thiazolidione derivatives (H2-60 and H2-81) against Enterococcus faecium remains elusive. Here, the pET28a-YycG recombinant plasmid were in vitro expressed in E. coli competent cell BL21 (DE3) and induced to express YycG’ protein (conding HisKA and HATPase_c domain) by 0.5 mM IPTG and was purified by Ni – NTA agarose and then for the autophosphorylation test. Antimicrobial testing and time-killing assay were also be determined. Anti-biofilm activity of two derivatives with sub-MIC concentration towards positive biofilm producers of clinical E. faecium were detected using polystyrene microtiter plate and CLSM. Results The MICs of H2-60 and H2-81 in the clinical isolates of E. faecium were in the range from 3.125 mg/L to 25 mg/L. Moreover, either H2-60 or H2-81 showed the excellent bactericidal activity against E. faecium with monotherapy or its combination with daptomycin by time-killing assay. E. faecium planktonic cells can be decreased by H2-60 or H2-81 for more than 3 × log10 CFU/mL after 24 h treatment when combined with daptomycin. Furthermore, over 90% of E. faecium biofilm formation could markedly be inhibited by H2-60 and H2-81 at 1/4 × MIC value. In addition, the frequency of the eradicated viable cells embedded in mature biofilm were evaluated by the confocal laser microscopy, suggesting that of H2-60 combined with ampicillin or daptomycin was significantly high when compared with single treatment (78.17 and 74.48% vs. 41.59%, respectively, P < 0.01). Conclusion These two thiazolidione derivatives (H2-60 and H2-81) could directly impact the kinase phosphoration activity of YycG of E. faecium. H2-60 combined with daptomycin exhibit the excellent antibacterial and anti-biofilm activity against E. faecium by targeting YycG. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-021-02423-8.
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Affiliation(s)
- Zhong Chen
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China.,Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, Department of Medical Microbiology and Parasitology, School of Basic Medical Science and Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China
| | - Yanpeng Xiong
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Yuanyuan Tang
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Yuxi Zhao
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Junwen Chen
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Jinxin Zheng
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Yang Wu
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, Department of Medical Microbiology and Parasitology, School of Basic Medical Science and Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China
| | - Qiwen Deng
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Di Qu
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, Department of Medical Microbiology and Parasitology, School of Basic Medical Science and Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China.
| | - Zhijian Yu
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China.
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Targeting Staphylococcus aureus and its biofilms with novel antibacterial compounds produced by Lactiplantibacillus plantarum SJ33. Arch Microbiol 2021; 204:20. [DOI: 10.1007/s00203-021-02630-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/26/2022]
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Deng X, Zhang C, Chen J, Shi Y, Ma X, Wang Y, Wang Z, Yu Z, Zheng J, Chen Z. Antibacterial and anti-biofilm activities of histidine kinase YycG inhibitors against Streptococcus agalactiae. J Antibiot (Tokyo) 2021; 74:874-883. [PMID: 34489569 DOI: 10.1038/s41429-021-00475-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/09/2021] [Accepted: 08/16/2021] [Indexed: 02/08/2023]
Abstract
This study aims to investigate the antibacterial and anti-biofilm activities of YycG inhibitors H2-60 and H2-81 against Streptococcus agalactiae. A total of 118 nonduplicate S. agalactiae clinical isolates were collected, and the minimal inhibitory concentrations (MICs) of H2-60 and H2-81 were determined. H2-60 and H2-81 inhibit biofilm formation of S. agalactiae were detected by crystal violet staining, and against established biofilms of S. agalactiae were observed by confocal laser scanning microscope. Inhibitory effect of H2-60 and H2-81 on the phosphorylation activity of the HisKA domain of YycG' protein was measured. The MIC50/MIC90 was 3.13/6.25 μM for H2-60 and 6.25/12.5 μM for H2-81 against S. agalactiae, respectively. S. agalactiae planktonic cells can be decreased by H2-60 or H2-81 for more than 3 × log10 CFU ml-1 after 24 h treatment. Biofilm formation of 8 S. agalactiae strains (strong biofilm producers) was significantly reduced after treated with 1/4 × MIC of H2-60 or H2-81 for 24 h. H2-60 and H2-81 could reduce 45.79% and 29.56% of the adherent cells in the established biofilm of S. agalactiae after 72 h treatment, respectively. H2-60 combined with daptomycin reduced 83.63% of the adherent cells in the established biofilm of S. agalactiae, which was significantly better than that of H2-60 (45.79%) or daptomycin (55.07%) alone. The half maximal inhibitory concentrations (IC50) were 35.6 μM for H2-60 and 46.3 μM for H2-81 against the HisKA domain of YycG' protein. In conclusion, YycG inhibitors H2-60 and H2-81 exhibit excellent antibacterial and anti-biofilm activities against S. agalactiae.
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Affiliation(s)
- Xiangbin Deng
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Chaoqin Zhang
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Junwen Chen
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Yiyi Shi
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Xiaoyu Ma
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Yu Wang
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Zhanwen Wang
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Zhijian Yu
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China.,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China.,Quality Control Center of Hospital Infection management of Shenzhen, Guang Dong Medical University, Shenzhen, China
| | - Jinxin Zheng
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China. .,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China. .,Quality Control Center of Hospital Infection management of Shenzhen, Guang Dong Medical University, Shenzhen, China.
| | - Zhong Chen
- Department of Infectious Diseases and the Key Lab of Endogenous Infection, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China. .,Department of Infectious Diseases and the Key Lab of Endogenous Infection, Shenzhen Nanshan People's Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China. .,Quality Control Center of Hospital Infection management of Shenzhen, Guang Dong Medical University, Shenzhen, China.
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Liu Y, She P, Xu L, Chen L, Li Y, Liu S, Li Z, Hussain Z, Wu Y. Antimicrobial, Antibiofilm, and Anti-persister Activities of Penfluridol Against Staphylococcus aureus. Front Microbiol 2021; 12:727692. [PMID: 34489917 PMCID: PMC8418195 DOI: 10.3389/fmicb.2021.727692] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 07/22/2021] [Indexed: 12/23/2022] Open
Abstract
Staphylococcus aureus has increasingly attracted global attention as a major opportunistic human pathogen owing to the emergence of biofilms (BFs) and persisters that are known to increase its antibiotic resistance. However, there are still no effective antimicrobial agents in clinical settings. This study investigated the antimicrobial activity of penfluridol (PF), a long-acting antipsychotic drug, against S. aureus and its clinical isolates via drug repurposing. PF exhibited strong bactericidal activity against S. aureus, with a minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 4–8 and 16–32 μg/ml, respectively. PF could significantly inhibit biofilm formation and eradicate 24 h preformed biofilms of S. aureus in a dose-dependent manner. Furthermore, PF could effectively kill methicillin-resistant S. aureus (MRSA) persister cells and demonstrated considerable efficacy in a mouse model of subcutaneous abscess, skin wound infection, and acute peritonitis caused by MRSA. Notably, PF exerted almost no hemolysis activity on human erythrocytes, with limited cytotoxicity and low tendency to cause resistance. Additionally, PF induced bacterial membrane permeability and ATP release and further caused membrane disruption, which may be the underlying antibacterial mechanism of PF. In summary, our findings suggest that PF has the potential to serve as a novel antimicrobial agent against S. aureus biofilm- or persister-related infections.
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Affiliation(s)
- Yaqian Liu
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Pengfei She
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lanlan Xu
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lihua Chen
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yimin Li
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Shasha Liu
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zehao Li
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zubair Hussain
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yong Wu
- Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
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5
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Biosurfactant synergized with marine bacterial DNase disrupts polymicrobial biofilms. Folia Microbiol (Praha) 2021; 66:831-842. [PMID: 34169451 DOI: 10.1007/s12223-021-00876-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 05/17/2021] [Indexed: 10/21/2022]
Abstract
Globally, the occurrence of biofilm associated infection has become an alarming menace to the medical fraternity because the thick exopolysaccharide layer encasing the biofilms makes the biofilm producing pathogens inherently resistant to antibiotics. Candida albicans, the most common pathogen among Candida spp. is the causative agent for superficial and invasive candidiasis. The morphological phase switching from yeast to hyphal form is one of the virulent traits of C. albicans critical for its pathogenicity. Owing to the emergence of antifungal resistance among this opportunistic fungus, there is a dire need for improvised alternative antifungal agents. In the present study, we have evaluated a biosurfactant from a marine bacterium for its biofilm disruption ability against C. albicans. This biosurfactant had the potential to disrupt biofilms as well as to inhibit the morphological transition from yeast to hyphae. In addition, this biosurfactant showed enhance disruption of mixed species biofilms of C. albicans and Staphylococcus epidermidis when combined with DNase isolated from marine bacteria. From the results obtained, it is evident that the biosurfactant could act as a potential antibiofilm agent against drug resistant C. albicans strains.
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Neto I, Domínguez-Martín EM, Ntungwe E, Reis CP, Pesic M, Faustino C, Rijo P. Dehydroabietic Acid Microencapsulation Potential as Biofilm-Mediated Infections Treatment. Pharmaceutics 2021; 13:pharmaceutics13060825. [PMID: 34199531 PMCID: PMC8229915 DOI: 10.3390/pharmaceutics13060825] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/27/2021] [Accepted: 05/31/2021] [Indexed: 11/30/2022] Open
Abstract
The antimicrobial activity of dehydroabietic acid (DHA) for its use as an antibiofilm agent was tested in this work. DHA was assayed against a collection of Gram-positive, Gram-negative sensitive and resistant bacteria and yeasts through the minimum inhibitory concentration (MIC), MIC with Bioburden challenge, minimum bactericidal concentration (MBC), minimum biofilm inhibitory concentration (MBIC), MBIC with Bioburden challenge and growth curve studies. Toxicological studies (Artemia salina, sulforhodamine B (SRB) assay) were done to assess if the compound had antimicrobial and not cytotoxic properties. Furthermore, microencapsulation and stability studies were carried out to evaluate the chemical behavior and stability of DHA. On MIC results, Gram-positive bacteria Staphylococcus aureus ATCC 1228 and Mycobacterium smegmatis ATCC 607 presented a high efficiency (7.81 µg/mL), while on Gram-negative bacteria the highest MIC value of 125 µg/mL was obtained by all Klebsiella pneumoniae strains and Escherichia coli isolate strain HSM 303. Bioburden challenge showed that MIC, MBIC and percentage biofilm inhibition (BI) values suffered alterations, therefore, having higher concentrations. MBIC values demonstrated that DHA has a higher efficiency against S. aureus ATCC 43866 with a percentage of BI of 75.13 ± 0.82% at 0.49 µg/mL. Growth curve kinetic profiles of DHA against S. aureus ATCC 25923 were observed to be bacteriostatic. DHA-alginate beads had a average size of 2.37 ± 0.20 and 2.31 ± 0.17 × 103 µm2 with an encapsulation efficiency (EE%) around 99.49 ± 0.05%, a protection percentage (PP%) of 60.00 ± 0.05% in the gastric environment and a protection efficiency (PE%) around 88.12 ± 0.05% against UV light. In toxicological studies DHA has shown IC50 of 19.59 ± 7.40 µg/mL and a LC50 of 21.71 ± 2.18%. The obtained results indicate that DHA is a promising antimicrobial candidate against a wide range of bacteria and biofilm formation that must be further explored.
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Affiliation(s)
- Iris Neto
- CBIOS-Research Center for Biosciences & Health Technologies, Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal; (I.N.); (E.M.D.-M.); (E.N.)
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
| | - Eva María Domínguez-Martín
- CBIOS-Research Center for Biosciences & Health Technologies, Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal; (I.N.); (E.M.D.-M.); (E.N.)
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group. Ctra. A2, Department of Biomedical Sciences, Faculty of Pharmacy, Km 33.100—Campus Universitario, University of Alcalá de Henares, Alcalá de Henares, 28805 Madrid, Spain
| | - Epole Ntungwe
- CBIOS-Research Center for Biosciences & Health Technologies, Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal; (I.N.); (E.M.D.-M.); (E.N.)
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group. Ctra. A2, Department of Biomedical Sciences, Faculty of Pharmacy, Km 33.100—Campus Universitario, University of Alcalá de Henares, Alcalá de Henares, 28805 Madrid, Spain
| | - Catarina P. Reis
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
| | - Milica Pesic
- Institute for Biological Research “Sinisa Stankovic”-National Institute of Republic of Serbia, University of Belgrade 142, 11060 Belgrade, Serbia;
| | - Célia Faustino
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
- Correspondence: (C.F.); (P.R.)
| | - Patrícia Rijo
- CBIOS-Research Center for Biosciences & Health Technologies, Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal; (I.N.); (E.M.D.-M.); (E.N.)
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
- Correspondence: (C.F.); (P.R.)
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ROS Mediated Cytotoxicity Exhibited by Cashewnut Shell Extract Coated AgNPs Against Staphylococcus aureus Isolated from Milk. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01812-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Plakunov VK, Zhurina MV, Gannesen AV, Mart’yanov SV, Nikolaev YA. Antibiofilm Agents: Therminological Ambiguity and Strategy for Search. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261719060146] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Bocquet L, Sahpaz S, Bonneau N, Beaufay C, Mahieux S, Samaillie J, Roumy V, Jacquin J, Bordage S, Hennebelle T, Chai F, Quetin-Leclercq J, Neut C, Rivière C. Phenolic Compounds from Humulus lupulus as Natural Antimicrobial Products: New Weapons in the Fight against Methicillin Resistant Staphylococcus aureus, Leishmania mexicana and Trypanosoma brucei Strains. Molecules 2019; 24:molecules24061024. [PMID: 30875854 PMCID: PMC6472001 DOI: 10.3390/molecules24061024] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/09/2019] [Accepted: 03/10/2019] [Indexed: 12/23/2022] Open
Abstract
New anti-infective agents are urgently needed to fight microbial resistance. Methicillin-resistant Staphylococcus aureus (MRSA) strains are particularly responsible for complicated pathologies that are difficult to treat due to their virulence and the formation of persistent biofilms forming a complex protecting shell. Parasitic infections caused by Trypanosoma brucei and Leishmania mexicana are also of global concern, because of the mortality due to the low number of safe and effective treatments. Female inflorescences of hop produce specialized metabolites known for their antimicrobial effects but underexploited to fight against drug-resistant microorganisms. In this study, we assessed the antimicrobial potential of phenolic compounds against MRSA clinical isolates, T. brucei and L. mexicana. By fractionation process, we purified the major prenylated chalcones and acylphloroglucinols, which were quantified by UHPLC-UV in different plant parts, showing their higher content in the active flowers extract. Their potent antibacterial action (MIC < 1 µg/mL for the most active compound) was demonstrated against MRSA strains, through kill curves, post-antibiotic effects, anti-biofilm assays and synergy studies with antibiotics. An antiparasitic activity was also shown for some purified compounds, particularly on T. brucei (IC50 < 1 to 11 µg/mL). Their cytotoxic activity was assessed both on cancer and non-cancer human cell lines.
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Affiliation(s)
- Laetitia Bocquet
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Sevser Sahpaz
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Natacha Bonneau
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Claire Beaufay
- Pharmacognosy Research group, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Séverine Mahieux
- U995-LIRIC, Lille Inflammation Research International Center, University Lille, Inserm, CHU Lille, 59000 Lille, France.
| | - Jennifer Samaillie
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Vincent Roumy
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Justine Jacquin
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Simon Bordage
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Thierry Hennebelle
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
| | - Feng Chai
- U1008-Controlled Drug Delivery Systems and Biomaterials, University Lille, Inserm, CHU Lille, 59000 Lille, France.
| | - Joëlle Quetin-Leclercq
- Pharmacognosy Research group, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Christel Neut
- U995-LIRIC, Lille Inflammation Research International Center, University Lille, Inserm, CHU Lille, 59000 Lille, France.
| | - Céline Rivière
- EA 7394-ICV, Charles Viollette Research Institute, SFR Condorcet FR CNRS 3417, Univ. Lille, INRA, ISA-Yncréa, Univ. Artois, University Littoral Côte d'Opale, 3 rue du Professeur Laguesse, 59000 Lille, France.
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Perumal G, Chakrabarti A, Grewal HS, Pati S, Singh S, Arora HS. Enhanced antibacterial properties and the cellular response of stainless steel through friction stir processing. BIOFOULING 2019; 35:187-203. [PMID: 30913919 DOI: 10.1080/08927014.2019.1584794] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 02/05/2019] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
Biofilm related bacterial infection is one of the primary causes of implant failure. Limiting bacterial adhesion and colonization of pathogenic bacteria is a challenging task in health care. Here, a highly simplistic processing technique for imparting antibacterial properties on a biomedical grade stainless steel is demonstrated. Low-temperature high strain-rate deformation achieved using submerged friction stir processing resulted in a nearly single phase ultra-fine grain structure. The processed stainless steel demonstrated improved antibacterial properties for both Gram-positive and Gram-negative bacteria, significantly impeding biofilm formation during the in vitro study. Also, the processed stainless steel showed better compatibility with human fibroblasts manifested through apparent cell spreading and proliferation. The substantial antibacterial properties of the processed steel are explained in terms of the favorable electronic characteristics of the metal-oxide and by using classical Derjaguin-Landau-Verwey-Overbeek (DLVO) and the extended DLVO (XDLVO) approach at the cell-substrate interface.
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Affiliation(s)
- Gopinath Perumal
- a Surface Science and Tribology Laboratory, School of Mechanical Engineering , Shiv Nadar University , Greater Noida , Uttar Pradesh , India
| | - Amrita Chakrabarti
- b Department of Life Sciences, School of Natural Sciences , Shiv Nadar University , Greater Noida , Uttar Pradesh , India
| | - Harpreet S Grewal
- a Surface Science and Tribology Laboratory, School of Mechanical Engineering , Shiv Nadar University , Greater Noida , Uttar Pradesh , India
| | - Soumya Pati
- b Department of Life Sciences, School of Natural Sciences , Shiv Nadar University , Greater Noida , Uttar Pradesh , India
| | - Shailja Singh
- b Department of Life Sciences, School of Natural Sciences , Shiv Nadar University , Greater Noida , Uttar Pradesh , India
- c Special Center for Molecular Medicine , Jawaharlal Nehru University , New Delhi , India
| | - Harpreet S Arora
- a Surface Science and Tribology Laboratory, School of Mechanical Engineering , Shiv Nadar University , Greater Noida , Uttar Pradesh , India
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Hrubanova K, Krzyzanek V, Nebesarova J, Ruzicka F, Pilat Z, Samek O. Monitoring Candida parapsilosis and Staphylococcus epidermidis Biofilms by a Combination of Scanning Electron Microscopy and Raman Spectroscopy. SENSORS 2018; 18:s18124089. [PMID: 30469521 PMCID: PMC6308600 DOI: 10.3390/s18124089] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 11/16/2018] [Accepted: 11/20/2018] [Indexed: 02/03/2023]
Abstract
The biofilm-forming microbial species Candida parapsilosis and Staphylococcus epidermidis have been recently linked to serious infections associated with implanted medical devices. We studied microbial biofilms by high resolution scanning electron microscopy (SEM), which allowed us to visualize the biofilm structure, including the distribution of cells inside the extracellular matrix and the areas of surface adhesion. We compared classical SEM (chemically fixed samples) with cryogenic SEM, which employs physical sample preparation based on plunging the sample into various liquid cryogens, as well as high-pressure freezing (HPF). For imaging the biofilm interior, we applied the freeze-fracture technique. In this study, we show that the different means of sample preparation have a fundamental influence on the observed biofilm structure. We complemented the SEM observations with Raman spectroscopic analysis, which allowed us to assess the time-dependent chemical composition changes of the biofilm in vivo. We identified the individual spectral peaks of the biomolecules present in the biofilm and we employed principal component analysis (PCA) to follow the temporal development of the chemical composition.
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Affiliation(s)
- Kamila Hrubanova
- Institute of Scientific Instruments of the Czech Academy of Sciences, CZ-61264 Brno, Czech Republic.
| | - Vladislav Krzyzanek
- Institute of Scientific Instruments of the Czech Academy of Sciences, CZ-61264 Brno, Czech Republic.
| | - Jana Nebesarova
- Biology Centre of the Czech Academy of Sciences, CZ-37005 Ceske Budejovice, Czech Republic.
| | - Filip Ruzicka
- Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne's Faculty Hospital, CZ-65691 Brno, Czech Republic.
| | - Zdenek Pilat
- Institute of Scientific Instruments of the Czech Academy of Sciences, CZ-61264 Brno, Czech Republic.
| | - Ota Samek
- Institute of Scientific Instruments of the Czech Academy of Sciences, CZ-61264 Brno, Czech Republic.
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Sun X, Lin ZW, Hu XX, Yao WM, Bai B, Wang HY, Li DY, Chen Z, Cheng H, Pan WG, Deng MG, Xu GJ, Tu HP, Chen JW, Deng QW, Yu ZJ, Zheng JX. Biofilm formation in erythromycin-resistant Staphylococcus aureus and the relationship with antimicrobial susceptibility and molecular characteristics. Microb Pathog 2018; 124:47-53. [PMID: 30118805 DOI: 10.1016/j.micpath.2018.08.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 06/09/2018] [Accepted: 08/13/2018] [Indexed: 11/16/2022]
Abstract
PURPOSE In this study, we aimed to investigate biofilm formation characteristics in clinical Staphylococcus aureus (S. aureus) isolates with erythromycin (ERY) resistance from China and further analyze their correlations with antimicrobial susceptibility and molecular characteristics. METHODOLOGY A total of 276 clinical isolates of ERY-resistant S. aureus, including 142 methicillin-resistant S. aureus (MRSA) strains and 134 methicillin-susceptible S. aureus (MSSA) strains, were retrospectively collected in China. Biofilms were determined by crystal violet staining and ERY resistance genes (ermA, ermB and ermC) were detected by polymerase chain reaction. Inducible clindamycin resistance was examined by D test and multilocus sequence typing, and clonal complexes (CCs) based on housekeeping genes were further determined. RESULTS The frequency of biofilm formation among ERY-resistant S. aureus was 40.9% (113/276) in total and no significant difference was found for the frequency of biofilm formation between ERY-resistant MRSA and ERY-resistant MSSA (44.4% vs 37.3%, P > 0.05). In ERY-resistant MRSA isolates, the frequency of biofilm formation in ermA-positive, gentamicin-resistant and ciprofloxacin-resistant isolates was higher than that in ermA-negative, gentamicin-sensitive and ciprofloxacin-sensitive isolates, respectively (63.9% vs 23.6%, P < 0.01; 60.3% vs 27.5%, P < 0.01; 65.2% vs 26.3%, P < 0.01). In addition, tetracycline resistance facilitated biofilm formation in both ERY-resistant MRSA and MSSA and the frequency of biofilm formation in CC239- or CC7S. aureus isolates with ERY resistance was significantly higher compared with that in CC59S. aureus (both P < 0.01). CONCLUSION The ermA gene, and gentamicin, ciprofloxacin and tetracycline resistance facilitate biofilm formation in ERY-resistant MRSA isolates and, moreover, ERY-resistant S. aureus isolates with positive biofilm formation exhibited clonality clustering regarding CC239 and CC7.
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Affiliation(s)
- Xiang Sun
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Zhi-Wei Lin
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China; Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, School of Basic Medical Science, Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China
| | - Xiao-Xiong Hu
- Department of Infectious Diseases, The People's Hospital of Yichun City, Yichun University, Yichun, 336000, China.
| | - Wei-Ming Yao
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Bing Bai
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Hong-Yan Wang
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Duo-Yun Li
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Zhong Chen
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Hang Cheng
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Wei-Guang Pan
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Ming-Gui Deng
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Guang-Jian Xu
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Hao-Peng Tu
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Jun-Wen Chen
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Qi-Wen Deng
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China
| | - Zhi-Jian Yu
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China.
| | - Jin-Xin Zheng
- Department of Infectious Diseases and Shenzhen Key Lab of Endogenous Infection, Quality Control Center of Hospital Infection Management of Shenzhen City, Shenzhen Nanshan People's Hospital and the 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, 518052, China; Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, School of Basic Medical Science, Institutes of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai, 200032, China.
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Gupta PV, Nirwane AM, Nagarsenker MS. Inhalable Levofloxacin Liposomes Complemented with Lysozyme for Treatment of Pulmonary Infection in Rats: Effective Antimicrobial and Antibiofilm Strategy. AAPS PharmSciTech 2018; 19:1454-1467. [PMID: 29464594 DOI: 10.1208/s12249-017-0945-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 12/21/2017] [Indexed: 12/16/2022] Open
Abstract
Treatment of bacterial infections becomes increasingly complicated due to increasing bacterial resistance and difficulty in developing new antimicrobial agents. Emphasis should be laid on improvising the existing treatment modalities. We studied the improved antimicrobial and antibiofilm activity of levofloxacin (LFX) and lysozyme (LYS) in microbiological studies. LFX at sub-minimum inhibitory concentration with LYS eradicated > 85% of preformed biofilm. LFX was actively loaded into the liposomes using pH gradient method and was spray-dried with LYS solution. Percent entrapment of LFX in liposome was > 80% and prolonged cumulative release of 85% LFX at the end of 12 h. In vitro lung deposition study and solid-state characterization for spray dried LFX liposome in combination with LYS (LFX liposome-LYS) was performed. Co-spray dried product had mass median aerodynamic diameter ranging < 5 μm. In pharmacodynamic study, Staphylococcus aureus infected rats were treated with LFX liposome-LYS. Lungs, bronchoalveolar lavage fluid (BALF), and nasal fluid were evaluated for microbial burden. Expression of cytokine levels in BALF and serum were also studied by ELISA. In addition, mRNA expression for lung inflammatory mediators and lung myeloperoxidase activity were carried out. Further, lungs and histological changes were observed grossly. Untreated infected rat lungs demonstrated higher mRNA expression for inflammatory markers, cytokine levels, and microbial load compared to vehicle control. Conversely, LFX liposome-LYS significantly abated these adverse repercussions. Histology findings were also in agreement of above. Acute toxicity study revealed safeness of LFX liposome-LYS. Our findings confirm LFX liposome-LYS exhibited prolonged, improved antibiofilm and antimicrobial efficacy in treating S. aureus infection.
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She P, Wang Y, Luo Z, Chen L, Tan R, Wang Y, Wu Y. Meloxicam inhibits biofilm formation and enhances antimicrobial agents efficacy by Pseudomonas aeruginosa. Microbiologyopen 2017; 7. [PMID: 29178590 PMCID: PMC5822345 DOI: 10.1002/mbo3.545] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/18/2017] [Accepted: 08/28/2017] [Indexed: 12/13/2022] Open
Abstract
Microbial biofilms are communities of surface‐adhered cells enclosed in a matrix of extracellular polymeric substances. Bacterial cells in biofilm are 10~1,000‐fold more resistant to antimicrobials than the planktonic cells. Burgeoning antibiotic resistance in Pseudomonas aeruginosa biofilm has necessitated the development of antimicrobial agents. Here, we have investigated the antibiofilm effect of meloxicam against P. aeruginosaPAO1 and its potential mechanisms. Further, we have explored whether meloxicam could enhance the susceptibility of bacterial biofilms to treatment with conventional antimicrobials. Here, we found that meloxicam could significantly inhibit PAO1 biofilm formation in a dose‐dependent manner at the concentration without influence on planktonic cell growth. Meloxicam could also significantly inhibit the motilities, production of extracellular matrix, and expression of quorum sensing‐related genes and virulence factors of PAO1. Furthermore, synergistic interaction was observed when meloxicam combined with tetracycline, gentamicin, tobramycin, ciprofloxacin, ceftriaxone, ofloxacin, norfloxacin, ceftazidime, and DNase at subminimal inhibitory concentrations against PAO1 bioiflm. Collectively, our study lays the foundation for further investigation of repurposing meloxicam as a topical antibiofilm agent to treat P. aeruginosa biofilm‐related infections.
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Affiliation(s)
- Pengfei She
- Department of Clinical Laboratory, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Yangxia Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhen Luo
- Department of Clinical Laboratory, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Lihua Chen
- Department of Clinical Laboratory, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Ruichen Tan
- Department of Clinical Laboratory, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Yanle Wang
- Department of Clinical Laboratory, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Yong Wu
- Department of Clinical Laboratory, The Third Xiangya Hospital of Central South University, Changsha, China
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Blanchette KA, Prabhakara R, Shirtliff ME, Wenke JC. Inhibition of fracture healing in the presence of contamination by Staphylococcus aureus: Effects of growth state and immune response. J Orthop Res 2017; 35:1845-1854. [PMID: 28387956 DOI: 10.1002/jor.23573] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 03/29/2017] [Indexed: 02/04/2023]
Abstract
Extremity injuries comprise a significant portion of trauma, affecting quality of life, financial burden, and return to duty. Bacterial contamination is commonly associated with failure to heal, despite antibiotic treatment, suggesting that additional therapies must be developed to combat these complications. Treatment failure is likely due to the presence of resistant microbial communities known as biofilms. Biofilm bacteria are able to elicit a direct inhibition of healing through a multitude of known factors. However, they likely also inhibit healing through alteration of the inflammatory response. As inflammation is a critical step in fracture healing, how the presence of biofilm bacteria shifts this response to one that is suboptimal for healing is an important consideration that is currently understudied. The profile of inflammatory factors in response to biofilm bacteria is unique and distinct from those induced during normal healing or by planktonic bacteria alone. This review will examine the presence of inflammatory factors during normal healing and those induced by contaminating bacteria, and will discuss how these differences may ultimately lead to nonunion. Specifically, this review will focus on the Th1/Th2/Th17 type inflammatory responses and how shifts in the balance of these responses during infection can lead to both ineffective clearance and disruption of fracture healing. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1845-1854, 2017.
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Affiliation(s)
- Krystle A Blanchette
- US Army Institute of Surgical Research, 3698 Chambers Pass STE B, JBSA Ft Sam, Houston 78234-7767, Texas
| | | | | | - Joseph C Wenke
- US Army Institute of Surgical Research, 3698 Chambers Pass STE B, JBSA Ft Sam, Houston 78234-7767, Texas
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Macdonald TJ, Wu K, Sehmi SK, Noimark S, Peveler WJ, du Toit H, Voelcker NH, Allan E, MacRobert AJ, Gavriilidis A, Parkin IP. Thiol-Capped Gold Nanoparticles Swell-Encapsulated into Polyurethane as Powerful Antibacterial Surfaces Under Dark and Light Conditions. Sci Rep 2016; 6:39272. [PMID: 27982122 PMCID: PMC5159832 DOI: 10.1038/srep39272] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 11/14/2016] [Indexed: 12/20/2022] Open
Abstract
A simple procedure to develop antibacterial surfaces using thiol-capped gold nanoparticles (AuNPs) is shown, which effectively kill bacteria under dark and light conditions. The effect of AuNP size and concentration on photo-activated antibacterial surfaces is reported and we show significant size effects, as well as bactericidal activity with crystal violet (CV) coated polyurethane. These materials have been proven to be powerful antibacterial surfaces against both Gram-positive and Gram-negative bacteria. AuNPs of 2, 3 or 5 nm diameter were swell-encapsulated into PU before a coating of CV was applied (known as PU-AuNPs-CV). The antibacterial activity of PU-AuNPs-CV samples was tested against Staphylococcus aureus and Escherichia coli as representative Gram-positive and Gram-negative bacteria under dark and light conditions. All light conditions in this study simulated a typical white-light hospital environment. This work demonstrates that the antibacterial activity of PU-AuNPs-CV samples and the synergistic enhancement of photoactivity of triarylmethane type dyes is highly dependent on nanoparticle size and concentration. The most powerful PU-AuNPs-CV antibacterial surfaces were achieved using 1.0 mg mL-1 swell encapsulation concentrations of 2 nm AuNPs. After two hours, Gram-positive and Gram-negative bacteria were reduced to below the detection limit (>4 log) under dark and light conditions.
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Affiliation(s)
- Thomas J. Macdonald
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Ke Wu
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Sandeep K. Sehmi
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Sacha Noimark
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - William J. Peveler
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Hendrik du Toit
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
| | - Nicolas H. Voelcker
- ARC Centre of Excellence for Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia, Mawson Lakes, 5095, Australia
| | - Elaine Allan
- Division of Microbial Diseases, UCL Eastman Dental Institute, University College London, 256 Grays Inn Road, London, WC1X 8LD, United Kingdom
| | - Alexander J. MacRobert
- UCL Division of Surgery and Interventional Science, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, United Kingdom
| | - Asterios Gavriilidis
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
| | - Ivan P. Parkin
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
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Darabpour E, Kashef N, Mashayekhan S. Chitosan nanoparticles enhance the efficiency of methylene blue-mediated antimicrobial photodynamic inactivation of bacterial biofilms: An in vitro study. Photodiagnosis Photodyn Ther 2016; 14:211-7. [PMID: 27118084 DOI: 10.1016/j.pdpdt.2016.04.009] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 04/03/2016] [Accepted: 04/18/2016] [Indexed: 12/18/2022]
Abstract
BACKGROUND Biodegradable chitosan nanoparticles (CSNPs) with an intrinsic antimicrobial activity may be a good choice to improve the effectiveness of antimicrobial photodynamic inactivation (APDI). The aim of this study was to investigate the effect of CSNPs on the efficiency of methylene blue (MB)-mediated APDI of Staphylococcus aureus and Pseudomonas aeruginosa biofilms. We also assessed the phototoxicity of MB+CSNPs towards human fibroblasts. METHODS CSNPs were prepared using ionic gelation method and characterized by dynamic light scattering (DLS) and field-emission scanning electron microscope (FESEM). Biofilms were developed in a 96-well polystyrene plate for 24h. In vitro phototoxic effect of MB+CSNPs (at final concentrations of 50μM MB) at fluence of 22.93J/cm(2)) on biofilms were studied. Appropriate controls were included. Also, in vitro cytotoxicity and phototoxicity of the above mixture was assessed on human dermal fibroblasts. RESULTS DLS and FESEM measurements confirmed the nanometric size of the prepared CSNPs. APDI mediated by the mixture of MB and CSNPs showed significant anti-biofilm photoinactivation (P<0.001, >3 and >2 log10 CFU reduction in S. aureus and P. aeruginosa biofilms, respectively) while MB-induced APDI led to approximately <1 log10 CFU reduction. At the same experimental conditions, only 25.1% of the fibroblasts were photoinactivated by MB+CSNPs. CONCLUSION Our findings showed that CSNPs enhanced the efficacy of MB-APDI; it may be due to the disruption of biofilm structure by polycationic CSNPs and subsequently deeper and higher penetration of MB into the biofilms.
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Affiliation(s)
- Esmaeil Darabpour
- Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
| | - Nasim Kashef
- Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
| | - Shohreh Mashayekhan
- Department of Chemical and Petroleum Engineering, Faculty of Science, Sharif University of Technology, Tehran, Iran.
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Gimeno M, Pinczowski P, Pérez M, Giorello A, Martínez MÁ, Santamaría J, Arruebo M, Luján L. A controlled antibiotic release system to prevent orthopedic-implant associated infections: An in vitro study. Eur J Pharm Biopharm 2015; 96:264-71. [PMID: 26297104 PMCID: PMC4644989 DOI: 10.1016/j.ejpb.2015.08.007] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 08/10/2015] [Accepted: 08/11/2015] [Indexed: 02/08/2023]
Abstract
A new device for local delivery of antibiotics is presented, with potential use as a drug-eluting fixation pin for orthopedic applications. The implant consists of a stainless steel hollow tubular reservoir packed with the desired antibiotic. Release takes place through several orifices previously drilled in the reservoir wall, a process that does not compromise the mechanical properties required for the implant. Depending on the antibiotic chosen and the number of orifices, the release profile can be tailored from a rapid release of the load (ca. 20 h) to a combination of rapid initial release and slower, sustained release for a longer period of time (ca. 200 h). An excellent bactericidal action is obtained, with 4-log reductions achieved in as little as 2 h, and total bacterial eradication in 8 h using 6-pinholed implants filled with cefazolin.
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Affiliation(s)
- Marina Gimeno
- Department of Animal Pathology, University of Zaragoza, C/ Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Pedro Pinczowski
- Department of Animal Pathology, University of Zaragoza, C/ Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Marta Pérez
- Department of Anatomy, Embryology and Genetics, University of Zaragoza, C/ Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Antonella Giorello
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro-Edificio I+D, C/ Poeta Mariano Esquillor s/n, 50018 Zaragoza, Spain
| | - Miguel Ángel Martínez
- Aragón Institute of Engineering Research (I3A), University of Zaragoza, C/ María de Luna s/n, 50018 Zaragoza, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Jesús Santamaría
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro-Edificio I+D, C/ Poeta Mariano Esquillor s/n, 50018 Zaragoza, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain.
| | - Manuel Arruebo
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro-Edificio I+D, C/ Poeta Mariano Esquillor s/n, 50018 Zaragoza, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain.
| | - Lluís Luján
- Department of Animal Pathology, University of Zaragoza, C/ Miguel Servet, 177, 50013 Zaragoza, Spain
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Biofilm Inhibitory Effect of Spirulina platensis Extracts on Bacteria of Clinical Significance. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s40011-015-0623-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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