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Bai J, Xie Y, Li M, Huang X, Guo Y, Sun J, Tang Y, Liu X, Wei C, Li J, Yang Y. Ultrasound-assisted extraction of emodin from Rheum officinale Baill and its antibacterial mechanism against Streptococcus suis based on CcpA. ULTRASONICS SONOCHEMISTRY 2024; 102:106733. [PMID: 38150957 PMCID: PMC10765492 DOI: 10.1016/j.ultsonch.2023.106733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 12/12/2023] [Accepted: 12/15/2023] [Indexed: 12/29/2023]
Abstract
Emodin was extracted from Rheum officinale Baill by ultrasound-assisted extraction (UAE), and ethanol was chosen as the suitable solvent through SEM and molecular dynamic simulation. Under the optimum conditions (power 541 W, time 23 min, liquid to material ratio 13:1 mL/g, ethanol concentration 83 %) predicted by RSM, the yield of emodin was 2.18 ± 0.11 mg/g. Moreover, ultrasound power and time displayed the significant effects on the extraction process. Extracting dynamics analysis indicated that the extraction process of emodin by UAE conformed to Fick's second diffusion law. The results of antibacterial experiments suggested that emodin can damage cell membrane and inhibit the expression of cps2A, sao, mrp, epf, neu and the hemolytic activity of S. suis. Biolayer interferometry and FT-IR multi-peak fitting assays demonstrated that emodin induced a secondary conformational shift in CcpA. Molecular docking and molecular dynamics confirmed that emodin bound to CcpA through hydrogen bonding (ALA248, GLU249, GLY129 and ASN196) and π-π T-shaped interaction (TYR225 and TYR130), and the mutation of amino acid residues affected the affinity of CcpA to emodin. Therefore, emodin inhibited the sugar utilization of S. suis through binding to CcpA, and CcpA may be a potential target to inhibit the growth of S. suis.
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Affiliation(s)
- Jingwen Bai
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yu Xie
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Miao Li
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Xianjun Huang
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yujia Guo
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Jingwen Sun
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yang Tang
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Xuantong Liu
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Chi Wei
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Jianqiang Li
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yu Yang
- College of Art and Science, Northeast Agricultural University, Harbin 150030, People's Republic of China.
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Roy S, Acosta JAM, Karak M, Ramirez-Velez I, Torikai K, Ren D, Barbosa LCA. Effects of Synthetic Tetronamides and Methylated Denigrins on Bacterial Quorum Sensing and Biofilm Formation. ACS OMEGA 2023; 8:37798-37807. [PMID: 37867724 PMCID: PMC10586261 DOI: 10.1021/acsomega.3c01729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 09/15/2023] [Indexed: 10/24/2023]
Abstract
Detrimental biofilms of bacterial pathogens cause chronic infections with a high-level tolerance to antibiotics. To identify new control agents, we synthesized and tested a total of 14 tetronamides (including 5 new compounds) and 6 denigrin intermediates on the model species Escherichia coli. At a concentration of 50 μg/mL, two tetronamides and two methylated denigrins exhibited significant inhibitory effects against biofilm formation of E. coli RP437, e.g., by 60 and 94%, respectively. Structural analysis of the tested compounds revealed that p-methoxybenzylidene and p-methoxyphenethyl moieties of denigrins are important for biofilm inhibition, while the former group is also essential to the activity against quorum sensing (QS) via AI-2. Specifically, tetramethyldenigrin B has strong inhibitory effects against both E. coli biofilm formation and AI-2-mediated QS and thus provides a promising lead structure for designing better control agents. Consistently, tetramethyldenigrin B also showed inhibitory activity against biofilm formation of uropathogenic E. coli. Together, these findings provide new insights for the rational design of novel biofilm and QS inhibitors.
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Affiliation(s)
- Sweta Roy
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Jaime A. M. Acosta
- Department
of Chemistry, Universidade Federal de Minas
Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil
- Chemical
Technology School, Universidad Tecnológica
de Pereira, Carrera 27
#10-02, Barrio Álamos, Risaralda, Pereira Código postal 660003, Colombia
| | - Milandip Karak
- Department
of Chemistry, Universidade Federal de Minas
Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Isabela Ramirez-Velez
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Kohei Torikai
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Faculty
of Chemistry, National University of Uzbekistan
named after Mirzo Ulugbek, 4 University Str., Tashkent 100174, Uzbekistan
| | - Dacheng Ren
- Department
of Biomedical and Chemical Engineering and Civil and Environmental
Engineering and Biology, Syracuse University, Syracuse, New York 13244, United States
| | - Luiz C. A. Barbosa
- Department
of Chemistry, Universidade Federal de Minas
Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil
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Mosallam FM, Abbas HA, Shaker GH, Gomaa SE. Alleviating the virulence of Pseudomonas aeruginosa and Staphylococcus aureus by ascorbic acid nanoemulsion. Res Microbiol 2023; 174:104084. [PMID: 37247797 DOI: 10.1016/j.resmic.2023.104084] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 05/31/2023]
Abstract
The high incidence of persistent multidrug resistant bacterial infections is a worldwide public health burden. Alternative strategies are required to deal with such issue including the use of drugs with anti-virulence activity. The application of nanotechnology to develop advanced Nano-materials that target quorum sensing regulated virulence factors is an attractive approach. Synthesis of ascorbic acid Nano-emulsion (ASC-NEs) and assessment of its activity in vitro against the virulence factors and its protective ability against pathogenesis as well as the effect against expression of quorum sensing genes of Pseudomonas aeruginosa and Staphylococcus aureus isolates. Ascorbic acid Nano-emulsion was characterized by DLS Zetasizer Technique, Zeta potential; Transmission Electron Microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR). The antibacterial activity of ASC-NEs was tested by the broth microdilution method and the activity of their sub-MIC against the expression of quorum sensing controlled virulence was investigated using phenotypic experiments and RT-PCR. The protective activity of ASC-NEs against P. aeruginosa as well as S. aureus pathogenesis was tested in vivo. Phenotypically, ASC-NEs had strong virulence inhibitory activity against the tested bacteria. The RT-PCR experiment showed that it exhibited significant QS inhibitory activity. The in vivo results showed that ASC-NEs protected against staphylococcal infection, however, it failed to protect mice against Pseudomonal infection. These results suggest the promising use of nanoformulations against virulence factors in multidrug resistant P. aeruginosa and S. aureus. However, further studies are required concerning the potential toxicity, clearance and phamacokinetics of the nanoformulations.
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Affiliation(s)
- Farag M Mosallam
- Drug Microbiology Lab., Drug Radiation Research Department, Biotechnology Division, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority, Cairo, Egypt.
| | - Hisham A Abbas
- Department of Microbiology and Immunology-Faculty of Pharmacy-Zagazig University, Zagazig, Egypt
| | - Ghada H Shaker
- Department of Microbiology and Immunology-Faculty of Pharmacy-Zagazig University, Zagazig, Egypt
| | - Salwa E Gomaa
- Department of Microbiology and Immunology-Faculty of Pharmacy-Zagazig University, Zagazig, Egypt
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Kim D, Crippen TL, Jordan HR, Tomberlin JK. Quorum sensing gene regulation in Staphylococcus epidermidis reduces the attraction of Aedes aegypti (L.) (Diptera: Culicidae). Front Microbiol 2023; 14:1208241. [PMID: 37426032 PMCID: PMC10324375 DOI: 10.3389/fmicb.2023.1208241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 05/22/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Identifying mechanisms regulating mosquito attraction to hosts is key to suppressing pathogen transmission. Historically, the ecology of the host microbial community and its influence on mosquito attraction, specifically, whether bacterial communication through quorum sensing (QS) modulates VOC production that affects mosquito behavior have not been extensively considered. Methods Behavioral choice assays were applied along with volatile collection, followed by GC-MS and RNA transcriptome analyses of bacteria with and without a quorum-sensing inhibitor, furanone C-30. Results Utilizing the quorum-sensing inhibitor on a skin-inhabiting bacterium, Staphylococcus epidermidis, we disrupted its interkingdom communication with adult Aedes aegypti and mitigated their attraction to a blood-meal by 55.1%. Discussion One potential mechanism suppressing mosquito attraction could be the reduction (31.6% in our study) of bacterial volatiles and their associated concentrations by shifting S. epidermidis metabolic (12 of 29 up regulated genes) and stress (5 of 36 down regulated genes) responses. Manipulating the quorum-sensing pathways could serve as a mechanism to reduce mosquito attraction to a host. Such manipulations could be developed into novel control methods for pathogen-transmitting mosquitoes and other arthropods.
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Affiliation(s)
- Dongmin Kim
- Department of Entomology, Texas A&M University, College Station, TX, United States
| | - Tawni L. Crippen
- Southern Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, TX, United States
| | - Heather R. Jordan
- Department of Biological Sciences, Mississippi State University, Starkville, MS, United States
| | - Jeffery K. Tomberlin
- Department of Entomology, Texas A&M University, College Station, TX, United States
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Ren Q, Luo W, Chi H, Zhang L, Chen W. Down-regulation of β-lactam antibiotics resistance and biofilm formation by Staphylococcus epidermidis is associated with isookanin. Front Cell Infect Microbiol 2023; 13:1139796. [PMID: 37234778 PMCID: PMC10206261 DOI: 10.3389/fcimb.2023.1139796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/24/2023] [Indexed: 05/28/2023] Open
Abstract
Introduction Biofilm formation is the major pathogenicity of Staphylococcus epidermidis (S. epidermidis), which enhances bacterial resistance to antibiotics. Isookanin has potential inhibitory activity on biofilm. Method The inhibiting mechanisms of isookanin against biofilm formation through surface hydrophobicity assay, exopolysaccharides, eDNA, gene expression analysis, microscopic visualization, and molecular docking were explored. Additionally, the combination of isookanin and β-lactam antibiotics were evaluated by the broth micro-checkerboard assay. Results The results showed that isookanin could decrease the biofilm formation of S. epidermidis by ≥85% at 250 μg/mL. The exopolysaccharides, eDNA and surface hydrophobicity were reduced after treatment with isookanin. Microscopic visualization analysis showed that there were fewer bacteria on the surface of the microscopic coverslip and the bacterial cell membrane was damaged after treatment with isookanin. The down-regulation of icaB and up-regulation of icaR were observed after treatment with isookanin. Additionally, the RNAIII gene was significantly up-regulated (p < 0.0001) at the mRNA level. Molecular docking showed that isookanin could bind to biofilm-related proteins. This indicated that isookanin can affect biofilm formation at the initial attachment phase and the aggregation phase. The FICI index showed that the combination of isookanin and β-lactam antibiotics were synergistic and could reduce doses of antibiotics by inhibiting biofilm formation. Discussion This study improved the antibiotic susceptibility of S. epidermidis through inhibition of the biofilm formation, and provided a guidance for the treatment of antibiotic resistance caused by biofilm.
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Affiliation(s)
- Qiang Ren
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin of Xinjiang Production & Construction Corps, College of Life Sciences and Technology, Tarim University, Alar, Xinjiang, China
| | - Wanhe Luo
- Engineering Laboratory for Tarim Animal Diseases Diagnosis and Control, College of Animal Science and Technology, Tarim University, Alar, Xinjiang, China
| | - Haoming Chi
- Engineering Laboratory for Tarim Animal Diseases Diagnosis and Control, College of Animal Science and Technology, Tarim University, Alar, Xinjiang, China
| | - Lili Zhang
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin of Xinjiang Production & Construction Corps, College of Life Sciences and Technology, Tarim University, Alar, Xinjiang, China
| | - Wei Chen
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin of Xinjiang Production & Construction Corps, College of Life Sciences and Technology, Tarim University, Alar, Xinjiang, China
- Engineering Laboratory for Tarim Animal Diseases Diagnosis and Control, College of Animal Science and Technology, Tarim University, Alar, Xinjiang, China
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Kantiwal U, Pandey J. Efficient Inhibition of Bacterial Biofilm Through Interference of Protein-Protein Interaction of Master Regulator Proteins: a Proof of Concept Study with SinR- SinI Complex of Bacillus subtilis. Appl Biochem Biotechnol 2023; 195:1947-1967. [PMID: 36401726 DOI: 10.1007/s12010-022-04231-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2022] [Indexed: 11/21/2022]
Abstract
Biofilm-associated microbial growth is a major cause of environmental, industrial, and public health concern. Therefore, there is a pressing need to discover and develop efficient antibiofilm strategies. Regulatory proteins vital for biofilm formation might be ideal targets for developing novel antibiofilm therapeutics. Their activities often depend on protein-protein interactions. Therefore, such targets present unique opportunities and challenges to drug discovery. In Bacillus subtilis, a model organism for studying biofilms, SinR acts as the master regulator of the biofilm formation cascade. Under favourable growth conditions, it represses the epsA-O and tapA-sipW-tasA operons, which encode for essential structural components of biofilms. Under unfavourable growth conditions, SinI, an agonist protein, inactivates SinR by forming a heterotrimeric complex. This results in derepression of epsA-O and tapA-sipW-tasA operons and leads to the phenotypic switch from planktonic to biofilm-associated form. We hypothesized that inhibiting SinR-SinI interaction might warrant repression of epsA-O and tapA-sipW-tasA operons and inhibit biofilm formation. To evaluate this hypothesis, we carried out a drug repurposing study for identifying potential inhibitors of SinI. Cefoperazone and itraconazole were identified as potential inhibitors with virtual screening. The stability of their interaction with SinI was assessed in extended MD performed over 100 ns. Both cefoperazone and itraconazole showed stable interaction. In in vitro studies, cefoperazone hindered the interaction of purified recombinant SinI and SinR. In the whole cell-based biofilm inhibition assays also cefoperazone was found to efficiently inhibited biofilm formation. These results provide proof of concept for targeting protein-protein interaction of master regulators as potential target for discovery and development of antibiofilm therapeutics. We propose that similar drug repurposing studies targeting key regulators of biofilm formation cascade could be an efficient approach for discovering novel anti-biofilm therapeutics against priority pathogens.
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Affiliation(s)
- Usha Kantiwal
- Laboratory of Molecular Microbiology, Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, NH-8, Kishangarh, Ajmer, 305817, Rajasthan, India
| | - Janmejay Pandey
- Laboratory of Molecular Microbiology, Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, NH-8, Kishangarh, Ajmer, 305817, Rajasthan, India.
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Fernandes S, Borges A, Gomes IB, Sousa SF, Simões M. Curcumin and 10-undecenoic acid as natural quorum sensing inhibitors of LuxS/AI-2 of Bacillus subtilis and LasI/LasR of Pseudomonas aeruginosa. Food Res Int 2023; 165:112519. [PMID: 36869520 DOI: 10.1016/j.foodres.2023.112519] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 01/06/2023] [Accepted: 01/21/2023] [Indexed: 01/26/2023]
Abstract
The quorum sensing (QS) system is related to cell-to-cell communication as a function of population density, which regulates several physiological functions including biofilm formation and virulence gene expression. QS inhibitors have emerged as a promising strategy to tackle virulence and biofilm development. Among a wide variety of phytochemicals, many of them have been described as QS inhibitors. Driven by their promising clues, this study aimed to identify active phytochemicals against LuxS/autoinducer-2 (AI-2) (as the universal QS system) from Bacillus subtilis and LasI/LasR (as a specific QS system) of Pseudomonas aeruginosa, through in silico analysis followed by in vitro validation. The optimized virtual screening protocols were applied to screen a phytochemical database containing 3479 drug-like compounds. The most promising phytochemicals were curcumin, pioglitazone hydrochloride, and 10-undecenoic acid. In vitro analysis corroborated the QS inhibitory activity of curcumin and 10-undecenoic acid, however, pioglitazone hydrochloride showed no relevant effect. Inhibitory effects on LuxS/AI-2 QS system triggered reduction of 33-77% by curcumin (at 1.25-5 µg/mL) and 36-64% by 10-undecenoic acid (at 12.5-50 µg/mL). Inhibition of LasI/LasR QS system was 21% by curcumin (at 200 µg/mL) and 10-54% by 10-undecenoic acid (at 15.625-250 µg/mL). In conclusion, in silico analysis allowed the identification of curcumin and, for the first time, 10-undecenoic acid (showing low cost, high availability, and low toxicity) as alternatives to counteract bacterial pathogenicity and virulence, avoiding the imposition of selective pressure usually related to classic industrial disinfection and antibiotics therapy.
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Affiliation(s)
- Susana Fernandes
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Anabela Borges
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Inês B Gomes
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Sérgio F Sousa
- UCIBIO/REQUIMTE, BioSIM, Departamento de Biomedicina, Faculdade de Medicina da Universidade do Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
| | - Manuel Simões
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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Bhowmik A, Chunhavacharatorn P, Bhargav S, Malhotra A, Sendrayakannan A, Kharkar PS, Nirmal NP, Chauhan A. Human Milk Oligosaccharides as Potential Antibiofilm Agents: A Review. Nutrients 2022; 14:nu14235112. [PMID: 36501142 PMCID: PMC9737902 DOI: 10.3390/nu14235112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/24/2022] [Accepted: 11/27/2022] [Indexed: 12/04/2022] Open
Abstract
Surface-associated bacterial communities called biofilms are ubiquitous in nature. Biofilms are detrimental in medical settings due to their high tolerance to antibiotics and may alter the final pathophysiological outcome of many healthcare-related infections. Several innovative prophylactic and therapeutic strategies targeting specific mechanisms and/or pathways have been discovered and exploited in the clinic. One such emerging and original approach to dealing with biofilms is the use of human milk oligosaccharides (HMOs), which are the third most abundant solid component in human milk after lactose and lipids. HMOs are safe to consume (GRAS status) and act as prebiotics by inducing the growth and colonization of gut microbiota, in addition to strengthening the intestinal epithelial barrier, thereby protecting from pathogens. Moreover, HMOs can disrupt biofilm formation and inhibit the growth of specific microbes. In the present review, we summarize the potential of HMOs as antibacterial and antibiofilm agents and, hence, propose further investigations on using HMOs for new-age therapeutic interventions.
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Affiliation(s)
- Ankurita Bhowmik
- Department of Microbiology, Tripura University, Agartala 799022, India
| | | | - Sharanya Bhargav
- Department of Molecular Biology, Yuvaraja’s College, Mysuru 570005, India
| | - Akshit Malhotra
- Department of Microbiology, Tripura University, Agartala 799022, India
- Invisiobiome, New Delhi 110066, India
| | - Akalya Sendrayakannan
- Department of Food Engineering and Technology, Institute of Chemical Technology (ICT), Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Prashant S. Kharkar
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology (ICT), Nathalal Parekh Marg, Matunga, Mumbai 400019, India
- Correspondence: (P.S.K.); (N.P.N.); (A.C.)
| | - Nilesh Prakash Nirmal
- Institute of Nutrition, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
- Correspondence: (P.S.K.); (N.P.N.); (A.C.)
| | - Ashwini Chauhan
- Department of Microbiology, Tripura University, Agartala 799022, India
- Correspondence: (P.S.K.); (N.P.N.); (A.C.)
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Muñoz-Cázares N, Castillo-Juárez I, García-Contreras R, Castro-Torres VA, Díaz-Guerrero M, Rodríguez-Zavala JS, Quezada H, González-Pedrajo B, Martínez-Vázquez M. A Brominated Furanone Inhibits Pseudomonas aeruginosa Quorum Sensing and Type III Secretion, Attenuating Its Virulence in a Murine Cutaneous Abscess Model. Biomedicines 2022; 10:biomedicines10081847. [PMID: 36009394 PMCID: PMC9404868 DOI: 10.3390/biomedicines10081847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 11/19/2022] Open
Abstract
Quorum sensing (QS) and type III secretion systems (T3SSs) are among the most attractive anti-virulence targets for combating multidrug-resistant pathogenic bacteria. Some halogenated furanones reduce QS-associated virulence, but their role in T3SS inhibition remains unclear. This study aimed to assess the inhibition of these two systems on Pseudomonas aeruginosa virulence. The halogenated furanones (Z)-4-bromo-5-(bromomethylene)-2(5H) (C-30) and 5-(dibromomethylene)-2(5H) (named hereafter GBr) were synthesized, and their ability to inhibit the secretion of type III exoenzymes and QS-controlled virulence factors was analyzed in P. aeruginosa PA14 and two clinical isolates. Furthermore, their ability to prevent bacterial establishment was determined in a murine cutaneous abscess model. The GBr furanone reduced pyocyanin production, biofilm formation, and swarming motility in the same manner or more effectively than C-30. Moreover, both furanones inhibited the secretion of ExoS, ExoT, or ExoU effectors in all tested strains. The administration of GBr (25 and 50 µM) to CD1 mice infected with the PA14 strain significantly decreased necrosis formation in the inoculation zone and the systemic spread of bacteria more efficiently than C-30 (50 µM). Molecular docking analysis suggested that the gem position of bromine in GBr increases its affinity for the active site of the QS LasR regulator. Overall, our findings showed that the GBr furanone displayed efficient multi-target properties that may favor the development of more effective anti-virulence therapies.
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Affiliation(s)
- Naybi Muñoz-Cázares
- Laboratorio de Fitoquímica, Posgrado en Botánica, Colegio de Postgraduados, Texcoco 56230, Mexico; (N.M.-C.); (I.C.-J.)
| | - Israel Castillo-Juárez
- Laboratorio de Fitoquímica, Posgrado en Botánica, Colegio de Postgraduados, Texcoco 56230, Mexico; (N.M.-C.); (I.C.-J.)
| | - Rodolfo García-Contreras
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico; (R.G.-C.); (M.D.-G.)
| | - Víctor Alberto Castro-Torres
- Departamento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico;
| | - Miguel Díaz-Guerrero
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico; (R.G.-C.); (M.D.-G.)
- Departamento de Genética Molecular, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico
| | - José S. Rodríguez-Zavala
- Departamento de Bioquímica, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México 14080, Mexico;
| | - Héctor Quezada
- Laboratorio de Investigación en Inmunología y Proteómica, Hospital Infantil de México Federico Gómez, Ciudad de México 06720, Mexico;
| | - Bertha González-Pedrajo
- Departamento de Genética Molecular, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico
- Correspondence: (B.G.-P.); (M.M.-V.)
| | - Mariano Martínez-Vázquez
- Departamento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico;
- Correspondence: (B.G.-P.); (M.M.-V.)
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10
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Preliminary Study on Phytochemical Constituents and Biological Activities of Essential Oil from Myriactis nepalensis Less. Molecules 2022; 27:molecules27144631. [PMID: 35889501 PMCID: PMC9324352 DOI: 10.3390/molecules27144631] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 11/17/2022] Open
Abstract
In response to the need for novel therapeutic strategies to combat the development of microbial resistance, plant essential oils may represent a promising alternative source. This study set out to characterize the chemical composition and assess the antibacterial potential of Myriactis nepalensis Less. essential oil (MNEO). Essential oil isolated from M. nepalensis by hydrodistillation was analyzed using a GC–MS technique. The antibacterial properties of MNEO alone and combined with antibiotics (chloramphenicol and streptomycin) were tested via the disc diffusion, microbroth dilution, and checkerboard methods. MNEO was represented by oxygenated sesquiterpenes (60.3%) and sesquiterpene hydrocarbons (28.6%), with caryophyllene oxide, spathulenol, humulene epoxide II, β-elemene, neointermedeol, and β-caryophyllene as the main compounds. MNEO exhibited a strong antibacterial effect against Gram-positive bacteria, with MIC and MBC values of 0.039 mg/mL and 0.039–0.156 mg/mL, respectively, and synergistic effects were observed in both combinations with chloramphenicol and streptomycin. Furthermore, the antibiofilm and cytotoxic activities of MNEO were also evaluated. The crystal violet assay was used for quantification of Staphylococcus aureus biofilm formation, and an MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay was conducted to determine cell viability. The results revealed MNEO could dose-dependently inhibit Staphylococcus aureus biofilm formation and possessed potential cytotoxic on both normal and cancer cells (IC50 values from 13.13 ± 1.90 to 35.22 ± 8.36 μg/mL). Overall, the results indicate that MNEO may have promising applications in the field of bacterial infections.
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11
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Pusparajah P, Letchumanan V, Law JWF, Ab Mutalib NS, Ong YS, Goh BH, Tan LTH, Lee LH. Streptomyces sp.-A Treasure Trove of Weapons to Combat Methicillin-Resistant Staphylococcus aureus Biofilm Associated with Biomedical Devices. Int J Mol Sci 2021; 22:ijms22179360. [PMID: 34502269 PMCID: PMC8431294 DOI: 10.3390/ijms22179360] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/23/2021] [Accepted: 08/26/2021] [Indexed: 11/16/2022] Open
Abstract
Biofilms formed by methicillin-resistant S. aureus (MRSA) are among the most frequent causes of biomedical device-related infection, which are difficult to treat and are often persistent and recurrent. Thus, new and effective antibiofilm agents are urgently needed. In this article, we review the most relevant literature of the recent years reporting on promising anti-MRSA biofilm agents derived from the genus Streptomyces bacteria, and discuss the potential contribution of these newly reported antibiofilm compounds to the current strategies in preventing biofilm formation and eradicating pre-existing biofilms of the clinically important pathogen MRSA. Many efforts are evidenced to address biofilm-related infections, and some novel strategies have been developed and demonstrated encouraging results in preclinical studies. Nevertheless, more in vivo studies with appropriate biofilm models and well-designed multicenter clinical trials are needed to assess the prospects of these strategies.
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Affiliation(s)
- Priyia Pusparajah
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbes and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (P.P.); (V.L.); (J.W.-F.L.); (N.-S.A.M.)
| | - Vengadesh Letchumanan
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbes and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (P.P.); (V.L.); (J.W.-F.L.); (N.-S.A.M.)
| | - Jodi Woan-Fei Law
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbes and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (P.P.); (V.L.); (J.W.-F.L.); (N.-S.A.M.)
| | - Nurul-Syakima Ab Mutalib
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbes and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (P.P.); (V.L.); (J.W.-F.L.); (N.-S.A.M.)
- UKM Medical Molecular Biology Institute (UMBI), UKM Medical Centre, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Yong Sze Ong
- Biofunctional Molecule Exploratory Research Group (BMEX), School of Pharmacy, Monash University Malaysia, Bandar Sunway 47500, Malaysia;
| | - Bey-Hing Goh
- Biofunctional Molecule Exploratory Research Group (BMEX), School of Pharmacy, Monash University Malaysia, Bandar Sunway 47500, Malaysia;
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Correspondence: (B.-H.G.); (L.T.-H.T.); (L.-H.L.)
| | - Loh Teng-Hern Tan
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbes and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (P.P.); (V.L.); (J.W.-F.L.); (N.-S.A.M.)
- Clinical School Johor Bahru, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Johor Bahru 80100, Malaysia
- Correspondence: (B.-H.G.); (L.T.-H.T.); (L.-H.L.)
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbes and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (P.P.); (V.L.); (J.W.-F.L.); (N.-S.A.M.)
- Correspondence: (B.-H.G.); (L.T.-H.T.); (L.-H.L.)
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12
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Do AD, Chang CC, Su CH, Hsu YM. Lactobacillus rhamnosus JB3 inhibits Helicobacter pylori infection through multiple molecular actions. Helicobacter 2021; 26:e12806. [PMID: 33843101 DOI: 10.1111/hel.12806] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/22/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Eradication of Helicobacter pylori infection is the most direct and effective way for preventing gastric cancer. Lactic acid bacteria are considered as alternative therapeutic agents against H. pylori infection. METHODS Effects of Lactobacillus rhamnosus JB3 (LR-JB3) on the virulence gene expression of H. pylori and infection-induced cellular responses of AGS cells were investigated by co-cultivating infected AGS cells with different multiplicity of infections (MOIs) of LR-JB3. RESULTS LR-JB3, specifically at a MOI of 25, suppressed the association ability of H. pylori and its induced IL-8 levels, as well as the mRNA levels of vacA, sabA, and fucT of H. pylori, infection-induced Lewis (Le)x antigen and Toll-like receptor 4 (TLR4) expressions in AGS cells. However, the apoptosis mediated by infection was inhibited by LR-JB3 in a dose-dependent manner. In addition, autoinducer (AI)-2 was observed to have increased the association ability and fucT expression of H. pylori, and Lex antigen and TLR4 expression of AGS cells. Interestingly, an unknown bioactive cue was hypothesized to have been secreted from LR-JB3 at a MOI of 25 to act as an antagonist of AI-2. CONCLUSIONS LR-JB3 possesses various means to interfere with H. pylori pathogenesis and infection-induced cellular responses of AGS cells to fight against infection.
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Affiliation(s)
- Anh Duy Do
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Chun-Chi Chang
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Chiu-Hsian Su
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Yuan-Man Hsu
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
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13
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Use of Quorum Sensing Inhibition Strategies to Control Microfouling. Mar Drugs 2021; 19:md19020074. [PMID: 33573187 PMCID: PMC7912365 DOI: 10.3390/md19020074] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/21/2021] [Accepted: 01/27/2021] [Indexed: 01/10/2023] Open
Abstract
Interfering with the quorum sensing bacterial communication systems has been proposed as a promising strategy to control bacterial biofilm formation, a key process in biofouling development. Appropriate in vitro biofilm-forming bacteria models are needed to establish screening methods for innovative anti-biofilm and anti-microfouling compounds. Four marine strains, two Pseudoalteromonas spp. and two Vibrio spp., were selected and studied with regard to their biofilm-forming capacity and sensitivity to quorum sensing (QS) inhibitors. Biofilm experiments were performed using two biofilm cultivation and quantification methods: the xCELLigence® system, which allows online monitoring of biofilm formation, and the active attachment model, which allows refreshment of the culture medium to obtain a strong biofilm that can be quantified with standard staining methods. Although all selected strains produced acyl-homoserine-lactone (AHL) QS signals, only the P. flavipulchra biofilm, measured with both quantification systems, was significantly reduced with the addition of the AHL-lactonase Aii20J without a significant effect on planktonic growth. Two-species biofilms containing P. flavipulchra were also affected by the addition of Aii20J, indicating an influence on the target bacterial strain as well as an indirect effect on the co-cultured bacterium. The use of xCELLigence® is proposed as a time-saving method to quantify biofilm formation and search for eco-friendly anti-microfouling compounds based on quorum sensing inhibition (QSI) strategies. The results obtained from these two in vitro biofilm formation methods revealed important differences in the response of biosensor bacteria to culture medium and conditions, indicating that several strains should be used simultaneously for screening purposes and the cultivation conditions should be carefully optimized for each specific purpose.
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14
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Khan M, Husain FM, Zia Q, Ahmad E, Jamal A, Alaidarous M, Banawas S, Alam MM, Alshehri BA, Jameel M, Alam P, Ahamed MI, Ansari AH, Ahmad I. Anti-quorum Sensing and Anti-biofilm Activity of Zinc Oxide Nanospikes. ACS OMEGA 2020; 5:32203-32215. [PMID: 33376858 PMCID: PMC7758897 DOI: 10.1021/acsomega.0c03634] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 11/04/2020] [Indexed: 05/25/2023]
Abstract
This study evaluates the impact of two separate incubation periods (4 and 6 weeks) on the morphology of sol-gel-fabricated ZnO nanospikes (ZNs), that is, ZN1 and ZN2, respectively. We further analyzed the inhibitory effects of ZN1 and ZN2 on quorum sensing (QS) and biofilm formation in Pseudomonas aeruginosa (PAO1) and Chromobacterium violaceum (strains 12472 and CVO26). The size of the synthesized ZNs was in the range of 40-130 nm, and finer nanoparticles were synthesized after an incubation period of 6 weeks. Treatment with ZNs decreased the production of violacein in the pathogen without affecting the bacterial growth, which indicated that ZNs inhibited the QS signaling regulated by N-acyl homoserine lactone. ZN2 had a higher inhibitory action on the virulence factor productivity than ZN1. Furthermore, ZN2-treated cells displayed a substantial decrease in azocasein-degrading protease activity (80%), elastase activity (83%), and pyocyanin production (85%) relative to untreated P. aeruginosa PAO1 cells. Treatment with ZN2 decreased swarming motility and exopolysaccharide production by 89 and 85%, respectively. ZN2 was effective against both the las & pqs systems of P. aeruginosa and exhibited broad-spectrum activity. Additionally, ZN2 was more efficient in inhibiting the biofilm formation at the attachment stage than ZN1. These findings revealed that in P. aeruginosa, ZN2 demonstrated inhibitory effects on QS as well as on the development of biofilms. Thus, ZN2 can be potentially used to treat drug-resistant P. aeruginosa infections.
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Affiliation(s)
- Mohd.
Farhan Khan
- Nano
Solver Lab, Department of Mechanical Engineering, Z. H. College of
Engineering & Technology, Aligarh Muslim
University, Aligarh 202002, India
- Department
of Science, Gagan College of Management
and Technology, Aligarh 202002, India
| | - Fohad Mabood Husain
- Department
of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Qamar Zia
- Health
and Basic Science Research Centre, Majmaah
University, Majmaah 11952, Saudi Arabia
- Department
of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Ejaz Ahmad
- Interdisciplinary
Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Azfar Jamal
- Health
and Basic Science Research Centre, Majmaah
University, Majmaah 11952, Saudi Arabia
- Department
of Biology, College of Science, Majmaah
University, Majmaah 11952, Saudi Arabia
| | - Mohammed Alaidarous
- Health
and Basic Science Research Centre, Majmaah
University, Majmaah 11952, Saudi Arabia
- Department
of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Saeed Banawas
- Health
and Basic Science Research Centre, Majmaah
University, Majmaah 11952, Saudi Arabia
- Department
of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
- Department
of Biomedical Sciences, Oregon State University, Corvallis, Oregon 97331, United States
| | - Md. Manzar Alam
- Regional
Research Institute of Unani Medicine (Under CCRUM, Ministry of AYUSH), Patna 800008, India
| | - Bader A. Alshehri
- Health
and Basic Science Research Centre, Majmaah
University, Majmaah 11952, Saudi Arabia
| | - Mohd. Jameel
- Department
of Zoology, Faculty of Life Sciences, Aligarh
Muslim University, Aligarh 202002, India
| | - Pravej Alam
- Department of Biology, Prince Sattam bin
Abdulaziz Univrsity, Alkharj 11942, Kingdom of Saudi Arabia
| | - Mohd Imran Ahamed
- Department of Chemistry, Aligarh
Muslim
University, Aligarh 202002, India
| | - Akhter H. Ansari
- Nano
Solver Lab, Department of Mechanical Engineering, Z. H. College of
Engineering & Technology, Aligarh Muslim
University, Aligarh 202002, India
| | - Iqbal Ahmad
- Department of
Agricultural Microbiology, Faculty of Agricultural
Sciences, Aligarh Muslim University, Aligarh 202002, India
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15
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Haque M, Islam S, Sheikh MA, Dhingra S, Uwambaye P, Labricciosa FM, Iskandar K, Charan J, Abukabda AB, Jahan D. Quorum sensing: a new prospect for the management of antimicrobial-resistant infectious diseases. Expert Rev Anti Infect Ther 2020; 19:571-586. [PMID: 33131352 DOI: 10.1080/14787210.2021.1843427] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Quorum-sensing (QS) is a microbial cell-to-cell communication system that utilizes small signaling molecules to mediates interactions between cross-kingdom microorganisms, including Gram-positive and -negative microbes. QS molecules include N-acyl-homoserine-lactones (AHLs), furanosyl borate, hydroxyl-palmitic acid methylester, and methyl-dodecanoic acid. These signaling molecules maintain the symbiotic relationship between a host and the healthy microbial flora and also control various microbial virulence factors. This manuscript has been developed based on published scientific papers. AREAS COVERED Furanones, glycosylated chemicals, heavy metals, and nanomaterials are considered QS inhibitors (QSIs) and are therefore capable of inhibiting the microbial QS system. QSIs are currently being considered as antimicrobial therapeutic options. Currently, the low speed at which new antimicrobial agents are being developed impairs the treatment of drug-resistant infections. Therefore, QSIs are currently being studied as potential interventions targeting QS-signaling molecules and quorum quenching (QQ) enzymes to reduce microbial virulence. EXPERT OPINION QSIs represent a novel opportunity to combat antimicrobial resistance (AMR). However, no clinical trials have been conducted thus far assessing their efficacy. With the recent advancements in technology and the development of well-designed clinical trials aimed at targeting various components of the, QS system, these agents will undoubtedly provide a useful alternative to treat infectious diseases.
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Affiliation(s)
- Mainul Haque
- Faculty of Medicine and Defence Health, Universiti Pertahanan Nasional Malaysia (National Defence University of Malaysia), Kuala Lumpur, Malaysia
| | - Salequl Islam
- Department of Microbiology, Jahangirnagar University, Savar, Dhaka, Bangladesh
| | | | - Sameer Dhingra
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine Campus, Eric Williams Medical Sciences Complex, Trinidad & Tobago
| | - Peace Uwambaye
- Department of Preventive & Community Dentistry, University of Rwanda College of Medicine and Health Sciences, School of Dentistry, Kigali, Rwanda
| | | | - Katia Iskandar
- Department of Mathématiques Informatique et Télécommunications, Université Toulouse III, Paul Sabatier, INSERM, UMR 1027, F-31000 Toulouse, France.,INSPECT-LB: Institut National de Santé Publique, d'Épidémiologie Clinique et de Toxicologie-Liban, Beirut 6573-14, Lebanon.,Faculty of Pharmacy, Lebanese University, Beirut 1106, Lebanon
| | - Jaykaran Charan
- Department of Pharmacology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | | | - Dilshad Jahan
- Department of Hematology, Asgar Ali Hospital, Dhaka, Bangladesh
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16
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Khan SA, Lee CS. Recent progress and strategies to develop antimicrobial contact lenses and lens cases for different types of microbial keratitis. Acta Biomater 2020; 113:101-118. [PMID: 32622052 DOI: 10.1016/j.actbio.2020.06.039] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 12/16/2022]
Abstract
Although contact lenses are widely used for vision correction, they are also the primary cause of a number of ocular diseases such as microbial keratitis (MK), etc. and inflammatory events such as infiltrative keratitis (IK), contact lens acute red eye (CLARE), contact lens-induced peripheral ulcer (CLPU), etc. These diseases and infiltrative events often result from microbial contamination of lens care solutions and lens cases that can be exacerbated by unsanitary lens care and extended lens wear. The treatment of microbial biofilms (MBs) on lens cases and contact lenses are complicated and challenging due to their resistance to conventional antimicrobial lens care solutions. More importantly, MK caused by MBs can lead to acute visual damage or even vision impairment. Therefore, the development of lens cases, lens care solutions, and contact lenses with effective antimicrobial performance against MK will contribute to the safe use of contact lenses. This review article summarizes and discusses different chemical approaches for the development of antimicrobial contact lenses and lens cases employing passive surface modifications, antimicrobial peptides, free-radical fabricating agents, quorum sensing quenchers, antibiotics, antifungal drugs and various metals and coatings with antimicrobial nanomaterials. The benefits and shortcomings of these approaches are assessed, and alternative solutions for future developments are discussed.
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Affiliation(s)
- Shakeel Ahmad Khan
- Center of Super-Diamond and Advanced Films (COSDAF), Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF), Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong.
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17
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Ohn H, Mizuno T, Sudo Y, Miyoshi S. Interaction of
Escherichia coli
and its culture supernatant with
Vibrio vulnificus
during biofilm formation. Microbiol Immunol 2020; 64:593-601. [DOI: 10.1111/1348-0421.12829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 06/01/2020] [Accepted: 06/23/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Han‐Min Ohn
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama City Okayama Japan
- Department of Food and Drug Administration Ministry of Health and Sports (Myanmar) Nay‐Pyi‐Taw Myanmar
| | - Tamaki Mizuno
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama City Okayama Japan
| | - Yuki Sudo
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama City Okayama Japan
| | - Shin‐Ichi Miyoshi
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama City Okayama Japan
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18
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Reis SVD, Ribeiro NS, Rocha DA, Fortes IS, Trentin DDS, Andrade SFD, Macedo AJ. N 4 -benzyl-N 2 -phenylquinazoline-2,4-diamine compound presents antibacterial and antibiofilm effect against Staphylococcus aureus and Staphylococcus epidermidis. Chem Biol Drug Des 2020; 96:1372-1379. [PMID: 32542979 DOI: 10.1111/cbdd.13745] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 05/16/2020] [Accepted: 05/31/2020] [Indexed: 01/09/2023]
Abstract
Staphylococcus aureus and Staphylococcus epidermidis are the main agents involved with implant-related infections. Their ability to adhere to medical devices with subsequent biofilm formation is crucial to the development of these infections. Herein, we described the antibacterial and antibiofilm activities of a quinazoline-based compound, N4 -benzyl-N2 -phenylquinazoline-2,4-diamine, against both biofilm-forming pathogens. The minimum inhibitory concentrations (MIC) were determined as 25 µM for S. aureus and 15 µM for S. epidermidis. At sub-MIC concentrations (20 µM for S. aureus and 10 µM for S. epidermidis), the compound was able to inhibit biofilm formation without interfere with bacterial growth, confirmed by scanning electron microscopy. Moreover, surfaces coated with the quinazoline-based compound were able to prevent bacterial adherence. In addition, this compound presented no toxicity to human red blood cells at highest MIC 25 µM and in vivo toxicity assay using Galleria mellonella larvae resulted in 82% survival with a high dose of 500 mg/kg body weight. These features evidence quinazoline-based compound as interesting entities to promising applications in biomedical fields, such as antimicrobial and in anti-infective approaches.
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Affiliation(s)
- Sharon Vieira Dos Reis
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Nicole Sartori Ribeiro
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | - Danielle da Silva Trentin
- Departamento de Ciências Básicas da Saúde, Programa de Pós-Graduação em Biociências, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | | | - Alexandre José Macedo
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Anti-staphylococcal activity of quaternized mannan from the yeast Candida albicans. Carbohydr Polym 2020; 240:116288. [PMID: 32475569 DOI: 10.1016/j.carbpol.2020.116288] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/24/2020] [Accepted: 04/10/2020] [Indexed: 12/26/2022]
Abstract
Global increase of antibiotic-resistant pathogens as well as elevated content of drug residues in the foodstuffs and the environment urgently calls for new biocompatible antimicrobial biomaterials. Yeast mannans represent readily available source of biodegradable materials for tailor-made derivatives that could be effective in biomedical applications. Here, antimicrobial properties of quaternized mannans (DSQ 0.12, 0.24, 0.30, 0.62) from Candida albicans against clinical multi-resistant strains of Staphylococcus aureus are confronted with possible cytotoxicity against human cells. As expected, both effects increase with increasing degree of quaternization. However, it is possible to define the "window", at quaternized mannan with DSQ 0.30 with good anti-microbial effectiveness and low cytotoxicity. This derivative exhibit minimum inhibitory (MIC) and minimum bactericidal (MBC) concentration from 62.5 to 250 μg/mL and demonstrate good biofilm inhibition effect. Also acceptable values were obtained in hemagglutination and hemolytic activity assays and also in cytotoxicity tests on human fibroblasts.
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20
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Terpinen-4-ol as an Antibacterial and Antibiofilm Agent against Staphylococcus aureus. Int J Mol Sci 2020; 21:ijms21124531. [PMID: 32630600 PMCID: PMC7350221 DOI: 10.3390/ijms21124531] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus aureus is able to rapidly develop mechanisms of resistance to various drugs and to form strong biofilms, which makes it necessary to develop new antibacterial drugs. The essential oil of Melaleuca alternifolia is used as an antibacterial, a property believed to be mainly due to the presence of terpinen-4-ol. Based on this, the objective of this study was to evaluate the antibacterial and antibiofilm potential of terpinen-4-ol against S. aureus. The Minimal Inhibitory and Minimal Bactericidal Concentrations (MIC and MBC) of terpinen-4-ol were determined, and the effect of its combination with antibacterial drugs as well as its activity against S. aureus biofilms were evaluated. In addition, an in silico analysis of its pharmacokinetic parameters and a molecular docking analysis were performed. Terpinen-4-ol presented a MIC of 0.25% (v/v) and an MBC of 0.5% (v/v) (bactericidal action); its association with antibacterials was also effective. Terpinen-4-ol has good antibiofilm activity, and the in silico results indicated adequate absorption and distribution of the molecule in vivo. Molecular docking indicated that penicillin-binding protein 2a is a possible target of terpinen-4-ol in S. aureus. This work highlights the good potential of terpinen-4-ol as an antibacterial product and provides support for future pharmacological studies of this molecule, aiming at its therapeutic application.
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21
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Wang X, Zhang J, Chen W, Tang Y, Zhou Y, Chen Y, Huang Y, Liu D. Study on the Effects of Estradiol in Staphylococcus epidermidis Device-Related Capsule Formation. Aesthetic Plast Surg 2020; 44:558-569. [PMID: 31832737 DOI: 10.1007/s00266-019-01567-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 11/29/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND Capsular contracture, mainly caused by Staphylococcus epidermidis (S. epidermidis) biofilm formation, is a complex problem for breast cancer patients who undergo surgical prosthetic breast reconstruction. Estradiol has been reported to be involved in the formation of bacterial biofilms. Thus, the underlying mechanism of estradiol in capsular contracture needs to be investigated. METHODS Biofilm-related gene expressions were measured by qRT-PCR after sterilizing the silicone with bacterial suspension and E2 treatment in vitro. Rat models were established with bilateral ovariectomy operations and estradiol subcutaneous injections. The effects of estradiol on capsular contracture were detected by monitoring serum estradiol levels, bacterial infection rate in organs, biofilm formation and capsular contracture in vivo; inflammatory factors in vivo were examined as well. Biofilm on the silicone implants was observed under a scanning electron microscope. RESULTS Both positive regulatory genes and negative regulatory genes were increased by the high concentration of estradiol, suggesting that estradiol can promote the formation of biofilm by not only positive but also negative regulations. High estradiol levels increased bacterial infection rate in organs, biofilm formation and capsular contracture. Further, high estradiol caused a large number of inflammatory cells to infiltrate and caused serious inflammatory reactions that aggravate the immune imbalances of the host. CONCLUSION High estradiol levels contribute to increasing capsular contracture caused by S. epidermidis biofilm formation. NO LEVEL ASSIGNED This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.
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Sharafutdinov IS, Ozhegov GD, Sabirova AE, Novikova VV, Lisovskaya SA, Khabibrakhmanova AM, Kurbangalieva AR, Bogachev MI, Kayumov AR. Increasing Susceptibility of Drug-Resistant Candida albicans to Fluconazole and Terbinafine by 2(5 H)-Furanone Derivative. Molecules 2020; 25:molecules25030642. [PMID: 32024254 PMCID: PMC7036972 DOI: 10.3390/molecules25030642] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 01/28/2020] [Accepted: 02/01/2020] [Indexed: 12/14/2022] Open
Abstract
The frequency of mycoses caused by drug-resistant fungal pathogen Candida albicans has increased drastically over the last two decades. The spread of drug-resistant strains, along with the limitations of currently available antifungals, complicates the management of fungal infections, thereby representing great challenges for clinical healthcare. Among various antimicrobial pharmacophores, 2(5H)-furanone derivatives have demonstrated antimicrobial, antifungal, and antibiofilm activities. In this study, we report the antifungal activity of the 2(5H)-furanone derivative F105, consisting of three pharmacophores, namely chlorinated 2(5H)-furanone, sulfonyl group, and l-menthol moiety. Although exhibiting moderate antifungal activity alone with the minimum inhibitory concentration (MIC) values of 32–256 μg/mL, F105 potentiates the activity of fluconazole and terbinafine with fractional inhibitory concentration index (FICI) values of 0.27–0.50. Thus, 16 μg/mL of F105 reduced the MICs of these antifungals against fluconazole-resistant C. albicans isolates four-fold, achieving similar values as for the intermediately susceptible phenotype. Confocal laser scanning microscopy revealed that the fluorescent 2(5H)-furanone derivative F145 was also able to penetrate through biofilms formed by C. albicans. Indeed, in the presence of F105, even sub-MIC concentrations of both fluconazole and terbinafine led to significant reduction of C. albicans CFUs in the mature biofilm. Thus, F105 appears to be a promising candidate for the development of novel antifungal agents as well as enhancers of current antifungal agents, particularly for the treatment of drug-resistant C. albicans infections.
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Affiliation(s)
- Irshad S. Sharafutdinov
- Laboratory of Molecular Genetics of Microorganisms, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia; (G.D.O.); (A.E.S.)
- Correspondence: (I.S.S.); (A.R.K.); Tel.: +7-927-402-1105 (I.S.S.); +7-904-665-1908 (A.R.K.)
| | - Georgii D. Ozhegov
- Laboratory of Molecular Genetics of Microorganisms, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia; (G.D.O.); (A.E.S.)
- Industrial Drug Technology and Biotechnology, Perm State Pharmaceutical Academy, Perm 614990, Russia
| | - Alina E. Sabirova
- Laboratory of Molecular Genetics of Microorganisms, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia; (G.D.O.); (A.E.S.)
| | | | - Svetlana A. Lisovskaya
- Kazan Scientific Research Institute of Epidemiology and Microbiology, Kazan 420015, Russia;
- Kazan State Medical University, Kazan 420012, Russia
| | - Alsu M. Khabibrakhmanova
- Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan 420008, Russia; (A.M.K.); (A.R.K.)
| | - Almira R. Kurbangalieva
- Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan 420008, Russia; (A.M.K.); (A.R.K.)
| | - Mikhail I. Bogachev
- Radio Systems Department & Biomedical Engineering Research Centre, St. Petersburg Electrotechnical University, St. Petersburg 197376, Russia;
| | - Airat R. Kayumov
- Laboratory of Molecular Genetics of Microorganisms, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia; (G.D.O.); (A.E.S.)
- Correspondence: (I.S.S.); (A.R.K.); Tel.: +7-927-402-1105 (I.S.S.); +7-904-665-1908 (A.R.K.)
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Insights into the chemistry and therapeutic potential of furanones: A versatile pharmacophore. Eur J Med Chem 2019; 171:66-92. [DOI: 10.1016/j.ejmech.2019.03.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/09/2019] [Accepted: 03/07/2019] [Indexed: 02/06/2023]
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Kang M, Kim S, Kim H, Song Y, Jung D, Kang S, Seo JH, Nam S, Lee Y. Calcium-Binding Polymer-Coated Poly(lactide- co-glycolide) Microparticles for Sustained Release of Quorum Sensing Inhibitors to Prevent Biofilm Formation on Hydroxyapatite Surfaces. ACS APPLIED MATERIALS & INTERFACES 2019; 11:7686-7694. [PMID: 30768237 DOI: 10.1021/acsami.8b18301] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Quorum sensing (QS) inhibitor-based therapy is an attractive strategy to inhibit bacterial biofilm formation without excessive induction of antibiotic resistance. Thus, we designed Ca2+-binding poly(lactide- co-glycolide) (PLGA) microparticles that can maintain a sufficient concentration of QS inhibitors around hydroxyapatite (HA) surfaces in order to prevent biofilm formation on HA-based dental or bone tissues or implants and, therefore, subsequent pathogenesis. Poly(butyl methacrylate- co-methacryloyloxyethyl phosphate) (PBMP) contains both Ca2+-binding phosphomonoester groups and PLGA-interacting butyl groups. The PBMP-coated PLGA (PLGA/PBMP) microparticles exhibited superior adhesion to HA surfaces without altering the sustained release properties of uncoated PLGA microparticles. PLGA/PBMP microparticle-encapsulating furanone C-30, a representative QS inhibitor, effectively inhibited the growth of Streptococcus mutans and its ability to form biofilms on HA surface for prolonged periods of up to 100 h, which was much longer than either furanone C-30 in its free form or when encapsulated in noncoated PLGA microparticles.
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Affiliation(s)
- Minji Kang
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Sungwhan Kim
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Heejin Kim
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Youngjun Song
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Dongwook Jung
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Sunah Kang
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Ji-Hun Seo
- Department of Materials Science and Engineering , Korea University , 145 Anam-ro , Seongbuk-gu, Seoul 02841 , Republic of Korea
| | - Sohee Nam
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Yan Lee
- Department of Chemistry, College of Natural Sciences , Seoul National University , Gwanak-ro 1 , Gwanak-gu, Seoul 08826 , Republic of Korea
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Unraveling the Molecular Mechanism of Selective Antimicrobial Activity of 2(5 H)-Furanone Derivative against Staphylococcus aureus. Int J Mol Sci 2019; 20:ijms20030694. [PMID: 30736278 PMCID: PMC6387044 DOI: 10.3390/ijms20030694] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/29/2019] [Accepted: 02/03/2019] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus aureus causes various infectious diseases, from skin impetigo to life-threatening bacteremia and sepsis, thus appearing an important target for antimicrobial therapeutics. In turn, the rapid development of antibiotic resistance and biofilm formation makes it extremely robust against treatment. Here, we unravel the molecular mechanism of the antimicrobial activity of the recently unveiled F105 consisting of three pharmacophores: chlorinated 2(5H)-furanone, sulfone, and l-menthol moieties. F105 demonstrates highly selective activity against Gram-positive bacteria and biofilm-embedded S. aureus and exhibits low risk of resistance development. We show explicitly that the fluorescent analogue of F105 rapidly penetrates into Gram-positive bacteria independently of their cell integrity and viability and accumulates there. By contrast, Gram-negative bacteria remain impermeable and, therefore, insusceptible to F105. Apparently, in bacterial cells, F105 induces reactive oxygen species (ROS) formation and nonspecifically interacts with a number of proteins, including ROS-utilizing ones. Using native and 2D PAGE, we confirm that F105 changes the charge of some proteins by either oxidation or direct interaction with them. Therefore, it seems justified to conclude that being simultaneously a ROS inducer and damaging proteins responsible for ROS utilization, F105 impairs the cellular anti-ROS defense representing a prospective ROS-inducing antibacterial agent.
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26
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Butenolide, a Marine-Derived Broad-Spectrum Antibiofilm Agent Against Both Gram-Positive and Gram-Negative Pathogenic Bacteria. MARINE BIOTECHNOLOGY 2019; 21:88-98. [PMID: 30612218 PMCID: PMC6394721 DOI: 10.1007/s10126-018-9861-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 11/07/2018] [Indexed: 02/06/2023]
Abstract
Bacterial biofilm can cause nosocomial recurrent infections and implanted device secondary infections in patients and strongly promotes development of pathogenic drug resistance in clinical treatments. Butenolide is an effective anti-macrofouling compound derived from a marine Streptomyces sp., but its antibiofilm efficacy remains largely unexplored. In the present study, the antibiofilm activities of butenolide were examined using biofilms formed by both Gram-positive and Gram-negative pathogenic model species. Four Escherichia coli strains, Pseudomonas aeruginosa, and methicillin-resistant Staphylococcus aureus (MRSA) were used as targets in antibiofilm assays that examined the effects of butenolide, including the following: (i) on bacterial growth; (ii) in inhibiting biofilm formation and eradicating mature biofilm; (iii) on biofilm structures. In addition, the synergistic effect between butenolide with tetracycline was also examined. Butenolide not only effectively inhibited the biofilm formation but also eradicated pre-formed biofilms of tested bacteria. Fractional inhibitory concentration index (FICI) indicated that butenolide was a potential tetracycline enhancer against E. coli, P. aeruginosa, and MRSA. These results indicated that butenolide may hold a great potential as an effective antibiofilm agent to control and prevent biofilm-associated infections in future clinical treatments.
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Reffuveille F, Josse J, Velard F, Lamret F, Varin-Simon J, Dubus M, Haney EF, Hancock REW, Mongaret C, Gangloff SC. Bone Environment Influences Irreversible Adhesion of a Methicillin-Susceptible Staphylococcus aureus Strain. Front Microbiol 2018; 9:2865. [PMID: 30538688 PMCID: PMC6277558 DOI: 10.3389/fmicb.2018.02865] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 11/07/2018] [Indexed: 12/25/2022] Open
Abstract
Prosthesis and joint infections are an important threat in public health, especially due to the development of bacterial biofilms and their high resistance to antimicrobials. Biofilm-associated infections increase mortality and morbidity rates as well as hospitalization costs. Prevention is the best strategy for this serious issue, so there is an urgent need to understand the signals that could induce irreversible bacterial adhesion on a prosthesis. In this context, we investigated the influence of the bone environment on surface adhesion by a methicillin-susceptible Staphylococcus aureus strain. Using static and dynamic biofilm models, we tested various bone environment factors and showed that the presence of Mg2+, lack of oxygen, and starvation each increased bacterial adhesion. It was observed that human osteoblast-like cell culture supernatants, which contain secreted components that would be found in the bone environment, increased bacterial adhesion capacity by 2-fold (p = 0.015) compared to the medium control. Moreover, supernatants from osteoblast-like cells stimulated with TNF-α to mimic inflammatory conditions increased bacterial adhesion by almost 5-fold (p = 0.003) without impacting on the overall biomass. Interestingly, the effect of osteoblast-like cell supernatants on bacterial adhesion could be counteracted by the activity of synthetic antibiofilm peptides. Overall, the results of this study demonstrate that factors within the bone environment and products of osteoblast-like cells directly influence S. aureus adhesion and could contribute to biofilm initiation on bone and/or prosthetics implants.
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Affiliation(s)
- Fany Reffuveille
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France
| | - Jérôme Josse
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France.,CIRI, INSERM U1111 - CNRS UMR5308 - ENS Lyon, Team "Staphylococcal Pathogenesis", Lyon 1 University, Lyon, France
| | - Frédéric Velard
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France
| | - Fabien Lamret
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France
| | - Jennifer Varin-Simon
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France
| | - Marie Dubus
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France
| | - Evan F Haney
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Robert E W Hancock
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Céline Mongaret
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France.,Pharmacy Department, University Hospital of Reims, Reims, France
| | - Sophie C Gangloff
- EA 4691 Biomaterials and Inflammation in Bone Site (BIOS), SFR Cap Santé (FED 4231), University of Reims-Champagne-Ardenne, Reims, France
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Mairink SZ, Barbosa LCA, Boukouvalas J, Pedroso SHSP, Santos SG, Magalhães PP, Farias LM. Synthesis and evaluation of cadiolide analogues as inhibitors of bacterial biofilm formation. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2246-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Control of Biofilm Formation in Healthcare: Recent Advances Exploiting Quorum-Sensing Interference Strategies and Multidrug Efflux Pump Inhibitors. MATERIALS 2018; 11:ma11091676. [PMID: 30201944 PMCID: PMC6163278 DOI: 10.3390/ma11091676] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/18/2018] [Accepted: 09/07/2018] [Indexed: 12/28/2022]
Abstract
Biofilm formation in healthcare is an issue of considerable concern, as it results in increased morbidity and mortality, imposing a significant financial burden on the healthcare system. Biofilms are highly resistant to conventional antimicrobial therapies and lead to persistent infections. Hence, there is a high demand for novel strategies other than conventional antibiotic therapies to control biofilm-based infections. There are two approaches which have been employed so far to control biofilm formation in healthcare settings: one is the development of biofilm inhibitors based on the understanding of the molecular mechanism of biofilm formation, and the other is to modify the biomaterials which are used in medical devices to prevent biofilm formation. This review will focus on the recent advances in anti-biofilm approaches by interrupting the quorum-sensing cellular communication system and the multidrug efflux pumps which play an important role in biofilm formation. Research efforts directed towards these promising strategies could eventually lead to the development of better anti-biofilm therapies than the conventional treatments.
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Antibacterial Effects of Phage Lysin LysGH15 on Planktonic Cells and Biofilms of Diverse Staphylococci. Appl Environ Microbiol 2018; 84:AEM.00886-18. [PMID: 29776929 DOI: 10.1128/aem.00886-18] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 05/15/2018] [Indexed: 01/07/2023] Open
Abstract
Treatment of infections caused by staphylococci has become more difficult because of the emergence of multidrug-resistant strains as well as biofilm formation. In this study, we observed the ability of the phage lysin LysGH15 to eliminate staphylococcal planktonic cells and biofilms formed by Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus haemolyticus, and Staphylococcus hominis All these strains were sensitive to LysGH15, showing reductions in bacterial counts of approximately 4 log units within 30 min after treatment with 20 μg/ml of LysGH15, and the MICs ranged from 8 μg/ml to 32 μg/ml. LysGH15 efficiently prevented biofilm formation by the four staphylococcal species at a dose of 50 μg/ml. At a higher dose (100 μg/ml), LysGH15 also showed notable disrupting activity against 24-h and 72-h biofilms formed by S. aureus and coagulase-negative species. In the in vivo experiments, a single intraperitoneal injection of LysGH15 (20 μg/mouse) administered 1 h after the injection of S. epidermidis at double the minimum lethal dose was sufficient to protect the mice. The S. epidermidis cell counts were 4 log units lower in the blood and 3 log units lower in the organs of mice 24 h after treatment with LysGH15 than in the untreated control mice. LysGH15 reduced cytokine levels in the blood and improved pathological changes in the organs. The broad antistaphylococcal activity exerted by LysGH15 on planktonic cells and biofilms makes LysGH15 a valuable treatment option for biofilm-related or non-biofilm-related staphylococcal infections.IMPORTANCE Most staphylococcal species are major causes of health care- and community-associated infections. In particular, Staphylococcus aureus is a common and dangerous pathogen, and Staphylococcus epidermidis is a ubiquitous skin commensal and opportunistic pathogen. Treatment of infections caused by staphylococci has become more difficult because of the emergence of multidrug-resistant strains as well as biofilm formation. In this study, we found that all tested S. aureus, S. epidermidis, Staphylococcus haemolyticus, and Staphylococcus hominis strains were sensitive to the phage lysin LysGH15 (MICs ranging from 8 to 32 μg/ml). More importantly, LysGH15 not only prevented biofilm formation by these staphylococci but also disrupted 24-h and 72-h biofilms. Furthermore, the in vivo efficacy of LysGH15 was demonstrated in a mouse model of S. epidermidis bacteremia. Thus, LysGH15 exhibits therapeutic potential for treating biofilm-related or non-biofilm-related infections caused by diverse staphylococci.
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Xiao A, Dhand C, Leung CM, Beuerman RW, Ramakrishna S, Lakshminarayanan R. Strategies to design antimicrobial contact lenses and contact lens cases. J Mater Chem B 2018; 6:2171-2186. [PMID: 32254560 DOI: 10.1039/c7tb03136j] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Contact lens wear is a primary risk factor for developing ocular complications, such as contact lens acute red eye (CLARE), contact lens-induced peripheral ulcer (CLPU) and microbial keratitis (MK). Infections occur due to microbial contamination of contact lenses, lens cases and lens care solution, which are exacerbated by extended lens wear and unsanitary lens care practices. The development of microbial biofilms inside lens cases is an additional complication, as the developed biofilms are resistant to conventional lens cleaning solutions. Ocular infections, particularly in the case of MK, can lead to visual impairment or even blindness, so there is a pressing need for the development of antimicrobial contact lenses and cases. Additionally, with the increasing use of bandage contact lenses and contact lenses as drug depots and with the development of smart contact lenses, contact lens hygiene becomes a therapeutically important issue. In this review, we attempt to compile and summarize various chemical strategies for developing antimicrobial contact lenses and lens cases by using silver, free-radical producing agents, antimicrobial peptides or by employing passive surface modification approaches. We also evaluated the advantages and disadvantages of each system and tried to provide input to future directions. Finally, we summarize the developing technologies of therapeutic contact lenses to shed light on the future of contact lens applications.
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Affiliation(s)
- Amy Xiao
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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Ding W, Sun J, Lian H, Xu C, Liu X, Zheng S, Zhang D, Han X, Liu Y, Chen X, God′spower BO, Li Y. The Influence of Shuttle-Shape Emodin Nanoparticles on the Streptococcus suis Biofilm. Front Pharmacol 2018; 9:227. [PMID: 29593544 PMCID: PMC5859365 DOI: 10.3389/fphar.2018.00227] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/28/2018] [Indexed: 12/12/2022] Open
Abstract
Biofilm is one of the most important physiological protective barriers of the Streptococcus suis (S. suis), and it is also one of the primary causes of hindrance to drug infiltration, reduction of bactericidal effects, and the development of antibiotic resistance. In order to intervene or eliminate S. suis biofilm, shuttle-shape emodin-loaded nanoparticles were developed in our study. The emodin nanoparticles were prepared by emodin and gelatin-cyclodextrin which was synthesized as drug carrier, and the nanoparticles were 174 nm in size, -4.64 mv in zeta potential, and exhibited a sustained emodin release. Moreover, the delivery kinetics of nanoparticles were also explored in our study. The confocal laser scanning microscopy and colony forming unit enumeration experiment indicated that nanoparticles could increase drug infiltration and uptake by biofilm. The flow cytometry system analysis showed that nanoparticles could be up taken by 99% of the bacteria cells. TCP assay and scanning electron microscopy showed that the nanoparticles had better effect on biofilm inhibition and elimination when compared with emodin solution. These results revealed that the emodin nanoparticles had a better therapeutic effect on the S. suis biofilm in vitro.
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Affiliation(s)
- Wenya Ding
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Jin Sun
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - He Lian
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Changgeng Xu
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Xin Liu
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Sidi Zheng
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Dong Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Xiaopeng Han
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Yanyan Liu
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Xueying Chen
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Bello O. God′spower
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Yanhua Li
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
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Abstract
Surface-attached colonies of bacteria known as biofilms play a major role in the pathogenesis of device-related infections. Biofilm colonies are notorious for their resistance to suprainhibitory concentrations of antibiotics. Numerous studies have shown that subminimal inhibitory concentrations of some antibiotics can act as agonists of bacterial biofilm formation in vitro, a process that may have clinical relevance. This article reviews studies demonstrating that low-dose antibiotics induce bacterial biofilm formation. These studies have provided important information about the regulation of biofilm formation and the signaling pathways involved in global gene regulation in response to cell stressors. It is still unclear whether antibiotic-induced biofilm formation contributes to the inconsistent success of antimicrobial therapy for device infections.
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Townsley L, Shank EA. Natural-Product Antibiotics: Cues for Modulating Bacterial Biofilm Formation. Trends Microbiol 2017; 25:1016-1026. [PMID: 28688575 PMCID: PMC5701842 DOI: 10.1016/j.tim.2017.06.003] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/01/2017] [Accepted: 06/09/2017] [Indexed: 12/15/2022]
Abstract
Cell-cell communication enables bacteria to coordinate their behavior through the production, recognition, and response to chemical signals produced by their microbial neighbors. An important example of coordinated behavior in bacteria is biofilm formation, where individual cells organize into highly complex, matrix-encased communities that differentiate into distinct cell types and divide labor among individual cells. Bacteria rely on environmental cues to influence biofilm development, including chemical cues produced by other microbes. A multitude of recent studies have demonstrated that natural-product antibiotics at subinhibitory concentrations can impact biofilm formation in neighboring microbes, supporting the hypothesis that these compounds may have evolved as signaling molecules that mediate cell-cell interactions. In this review we discuss the role of antibiotics in modulating biofilm formation and interspecies communication in bacteria.
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Affiliation(s)
- Loni Townsley
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Elizabeth A Shank
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Curriculum of Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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Sharafutdinov IS, Trizna EY, Baidamshina DR, Ryzhikova MN, Sibgatullina RR, Khabibrakhmanova AM, Latypova LZ, Kurbangalieva AR, Rozhina EV, Klinger-Strobel M, Fakhrullin RF, Pletz MW, Bogachev MI, Kayumov AR, Makarewicz O. Antimicrobial Effects of Sulfonyl Derivative of 2(5 H)-Furanone against Planktonic and Biofilm Associated Methicillin-Resistant and -Susceptible Staphylococcus aureus. Front Microbiol 2017; 8:2246. [PMID: 29209288 PMCID: PMC5701942 DOI: 10.3389/fmicb.2017.02246] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 10/31/2017] [Indexed: 01/15/2023] Open
Abstract
The gram-positive opportunistic bacterium Staphylococcus aureus is one of the most common causatives of a variety of diseases including skin and skin structure infection or nosocomial catheter-associated infections. The biofilm formation that is an important virulence factor of this microorganism renders the antibiotic therapy ineffective, because biofilm-embedded bacteria exhibit strongly increased tolerance to antimicrobials. Here, we describe a novel 3-chloro-5(S)-[(1R,2S,5R)-2-isopropyl-5-methylcyclohexyloxy]-4-[4-methylphenylsulfonyl]-2(5H)-furanone (F105), possessing a sulfonyl group and l-menthol moiety. Minimal inhibitory and bactericidal concentration values (MIC and MBC) of F105 were 10 and 40 mg/L, respectively, suggesting F105 biocidal properties. F105 exhibits pronounced activity against biofilm-embedded S. aureus and increases the efficacy of aminoglycosides (amikacin, gentamicin, and kanamycin) and benzalkonium chloride with fractional inhibitory concentration index values of 0.33–0.44 and 0.29, respectively, suggesting an alternative external treatment option, e.g., for wound infections. Moreover, low concentrations (0.5–1.3 mg/L) of F105 reduced the MICs of these antimicrobials twofold. By using confocal laser scanning microscopy and CFU counting, we show explicitly that F105 also restores the antimicrobial activity of gentamicin and ampicillin against S. aureus biofilms by several orders of magnitude. Biofilm structures were not destroyed but sterilized, with embedded cells being almost completely killed at twofold MBC. While F105 is quite toxic (CC50/MBC ratio 0.2), our data suggest that the F105 chemotype might be a promising starting point for the development of complex topical agents for combined anti-staphylococcal biofilm-therapies restoring the efficacy of some antibiotics against difficult to treat S. aureus biofilm.
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Affiliation(s)
| | - Elena Y Trizna
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Diana R Baidamshina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Maria N Ryzhikova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Regina R Sibgatullina
- Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russia
| | - Alsu M Khabibrakhmanova
- Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russia
| | - Liliya Z Latypova
- Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russia
| | - Almira R Kurbangalieva
- Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russia
| | - Elvira V Rozhina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Mareike Klinger-Strobel
- Center for Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany
| | - Rawil F Fakhrullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Mathias W Pletz
- Center for Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany
| | - Mikhail I Bogachev
- Biomedical Engineering Research Centre, Saint Petersburg Electrotechnical University, Saint Petersburg, Russia
| | - Airat R Kayumov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Oliwia Makarewicz
- Center for Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany
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Driche EH, Sabaou N, Bijani C, Zitouni A, Pont F, Mathieu F, Badji B. Streptomyces sp. AT37 isolated from a Saharan soil produces a furanone derivative active against multidrug-resistant Staphylococcus aureus. World J Microbiol Biotechnol 2017; 33:105. [PMID: 28466299 DOI: 10.1007/s11274-017-2265-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 04/12/2017] [Indexed: 11/26/2022]
Abstract
A novel actinobacterium strain, named AT37, showed a strong activity against some multidrug-resistant Staphylococcus aureus, including methicillin-resistant S. aureus MRSA ATCC 43300, other clinical isolates of MRSA and vancomycin resistant S. aureus VRSA S1. The strain AT37 was isolated from a Saharan soil by a dilution agar plating method using chitin-vitamin agar medium supplemented with rifampicin. The morphological and chemical studies indicated that this strain belonged to the genus Streptomyces. Its 16S rRNA gene sequence was determined and a database search indicated that it was closely associated with the type strain of Streptomyces novaecaesareae NBRC 13368T with 99.6% of similarity. However, the comparison of the morphological and the physiological characteristics of the strain with those of the nearest species showed significant differences. The strain AT37 secreted the antibiotic optimally during mid-stationary phase of growth. One active compound (AT37-1) was extracted from the culture broth with dichloromethane, separated on silica gel plates and purified by HPLC. Based on spectroscopic analysis of UV-Visible, infrared, and 1H and 13C NMR spectra and spectrometric analysis, the chemical structure of the compound AT37-1 was identified as 5-[(5E,7E,11E)-2,10-dihydroxy-9,11-dimethyl-5,7,11-tridecatrien-1-yl]-2-hydroxy-2-(1-hydroxyethyl)-4-methyl-3(2H)-furanone. Minimum inhibitory concentrations and minimum biofilm inhibitory concentration (MBIC50) of this compound showed significant activity against multidrug-resistant S. aureus with 15-30 and 10-15 μg/mL, respectively.
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Affiliation(s)
- El Hadj Driche
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure, Kouba, Alger, Algeria
- Département de Biologie, Faculté des Sciences de la Nature et de la Vie, Université Hassiba Benbouali de Chlef, Hay Salem, Chlef, 02000, Algeria
| | - Nasserdine Sabaou
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure, Kouba, Alger, Algeria.
| | - Christian Bijani
- Laboratoire de chimie de coordination (LCC), CNRS, Université de Toulouse, UPS, INPT, LCC, 205, route de Narbonne, 31077, Toulouse, France
| | - Abdelghani Zitouni
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure, Kouba, Alger, Algeria
| | - Frédéric Pont
- Proteomics Group, INSERM UMR1037, Centre de Recherches en Cancérologie de Toulouse (CRCT), Toulouse, France
| | - Florence Mathieu
- Laboratoire de Génie Chimique, LGC, UMR 5503 (CNRS/INPT/UPS), Université de Toulouse, Toulouse, France
| | - Boubekeur Badji
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure, Kouba, Alger, Algeria.
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37
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Sivaranjani M, Prakash M, Gowrishankar S, Rathna J, Pandian SK, Ravi AV. In vitro activity of alpha-mangostin in killing and eradicating Staphylococcus epidermidis RP62A biofilms. Appl Microbiol Biotechnol 2017; 101:3349-3359. [DOI: 10.1007/s00253-017-8231-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/14/2017] [Accepted: 03/07/2017] [Indexed: 11/24/2022]
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Yang YB, Wang S, Wang C, Huang QY, Bai JW, Chen JQ, Chen XY, Li YH. Emodin affects biofilm formation and expression of virulence factors in Streptococcus suis ATCC700794. Arch Microbiol 2015; 197:1173-80. [PMID: 26446827 DOI: 10.1007/s00203-015-1158-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 09/14/2015] [Accepted: 09/28/2015] [Indexed: 10/23/2022]
Abstract
Streptococcus suis (S. suis) is a swine pathogen and also a zoonotic agent. In this study, the effects of subinhibitory concentrations (sub-MICs) of emodin on biofilm formation by S. suis ATCC700794 were evaluated. As quantified by crystal violet staining, biofilm formation by S. suis ATCC700794 was dose-dependently decreased after growth with 1/2 MIC, 1/4 MIC, or 1/8 MIC of emodin. By scanning electron microscopy, the structural architecture of the S. suis ATCC700794 biofilms was examined following growth in culture medium supplemented with 1/2 MIC, 1/4 MIC, 1/8 MIC, or 1/16 MIC of emodin. Scanning electron microscopy analysis revealed the potential effect of emodin on biofilm formation by S. suis ATCC700794. The expression of luxS gene and virulence genes in S. suis ATCC700794 was investigated by quantitative RT-PCR. It was found that sub-MICs of emodin significantly decreased the expression of gapdh, sly, fbps, ef, and luxS. However, it was found that sub-MICs of emodin significantly increased the expression of cps2J, mrp, and gdh. These findings showed that sub-MICs of emodin could cause the difference in the expression level of the virulence genes.
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Affiliation(s)
- Yan-Bei Yang
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China.
| | - Shuai Wang
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Chang Wang
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Quan-Yong Huang
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Jing-Wen Bai
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Jian-Qing Chen
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Xue-Ying Chen
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Yan-Hua Li
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang, Harbin, 150030, Heilongjiang, People's Republic of China.
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Khan BA, Yeh AJ, Cheung GYC, Otto M. Investigational therapies targeting quorum-sensing for the treatment of Staphylococcus aureus infections. Expert Opin Investig Drugs 2015; 24:689-704. [PMID: 25704585 DOI: 10.1517/13543784.2015.1019062] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Antibiotic resistance is a serious global health concern for developed and developing nations. MRSA represents a particularly severe public health threat that is associated with high morbidity and mortality. The lack of novel antibiotics has led scientists to explore therapies targeting bacterial virulence mechanisms and virulence regulators, including those controlling cell-cell communication. AREAS COVERED The authors discuss the role of quorum-sensing in Staphylococcus aureus infections and components of the system that are being targeted using novel investigational drugs. In particular, the authors examine the role of the accessory gene regulator (Agr) system in virulence regulation of S. aureus pathogenesis. Finally, the authors present and compare natural and synthetic compounds that have been found to interfere with Agr functionality. EXPERT OPINION There is a great need to develop new therapeutic methods to combat S. aureus infections. These include anti-virulence therapies that target key global regulators involved with the establishment and propagation of infection. Several molecules have been found to interfere with S. aureus virulence regulation, especially those targeting the Agr quorum-sensing signaling molecule. These preliminary findings warrant further investigation and validation, with the goal of refining a compound that has broad-spectrum inhibitory effects on most S. aureus strains and Agr subtypes.
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Affiliation(s)
- Burhan A Khan
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories , 903 S. 4th St, 1/1110, Hamilton, MT 59840 , USA
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40
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Zhu S, Wu H, Zeng M, Zunying L, Zhao Y, Dong S. Regulation of Spoilage-Related Activities of S
hewanella putrefaciens
and S
hewanella baltica
by an Autoinducer-2 Analogue, (Z)-5-(Bromomethylene)furan-2(5H)-One. J FOOD PROCESS PRES 2014. [DOI: 10.1111/jfpp.12281] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Suqin Zhu
- College of Food Science and Engineering; Ocean University of China; Qingdao Shandong Province 266003 China
| | - Haohao Wu
- College of Food Science and Engineering; Ocean University of China; Qingdao Shandong Province 266003 China
| | - Mingyong Zeng
- College of Food Science and Engineering; Ocean University of China; Qingdao Shandong Province 266003 China
| | - Liu Zunying
- College of Food Science and Engineering; Ocean University of China; Qingdao Shandong Province 266003 China
| | - Yuanhui Zhao
- College of Food Science and Engineering; Ocean University of China; Qingdao Shandong Province 266003 China
| | - Shiyuan Dong
- College of Food Science and Engineering; Ocean University of China; Qingdao Shandong Province 266003 China
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Mhatre E, Monterrosa RG, Kovács AT. From environmental signals to regulators: modulation of biofilm development in Gram-positive bacteria. J Basic Microbiol 2014; 54:616-32. [PMID: 24771632 DOI: 10.1002/jobm.201400175] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 03/30/2014] [Indexed: 12/22/2022]
Abstract
Bacterial lifestyle is influenced by environmental signals, and many differentiation processes in bacteria are governed by the threshold concentrations of molecules present in their niche. Biofilm is one such example where bacteria in their sessile state adapt to a lifestyle that causes several adaptive alterations in the population. Here, a brief overview is given on a variety of environmental signals that bias biofilm development in Gram-positive bacteria, including nutrient conditions, self- and heterologously produced substances, like quorum sensing and host produced molecules. The Gram-positive model organism, Bacillus subtilis is a superb example to illustrate how distinct signals activate sensor proteins that integrate the environmental signals towards global regulators related to biofilm formation. The role of reduced oxygen level, polyketides, antimicrobials, plant secreted carbohydrates, plant cell derived polymers, glycerol, and osmotic conditions are discussed during the transcriptional activation of biofilm related genes in B. subtilis.
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Affiliation(s)
- Eisha Mhatre
- Terrestrial Biofilms Group, Institute of Microbiology, Friedrich Schiller University Jena, Jena, Germany
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42
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Pereira UA, Barbosa LC, Maltha CR, Demuner AJ, Masood MA, Pimenta AL. γ-Alkylidene-γ-lactones and isobutylpyrrol-2(5 H )-ones analogues to rubrolides as inhibitors of biofilm formation by Gram-positive and Gram-negative bacteria. Bioorg Med Chem Lett 2014; 24:1052-6. [DOI: 10.1016/j.bmcl.2014.01.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 01/06/2014] [Accepted: 01/08/2014] [Indexed: 10/25/2022]
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43
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Vestby LK, Johannesen KCS, Witsø IL, Habimana O, Scheie AA, Urdahl AM, Benneche T, Langsrud S, Nesse LL. Synthetic brominated furanone F202 prevents biofilm formation by potentially human pathogenic Escherichia coli O103:H2 and Salmonella ser. Agona on abiotic surfaces. J Appl Microbiol 2014; 116:258-68. [PMID: 24118802 PMCID: PMC4255294 DOI: 10.1111/jam.12355] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 09/23/2013] [Accepted: 09/24/2013] [Indexed: 02/07/2023]
Abstract
AIMS Investigate the use of a synthetic brominated furanone (F202) against the establishment of biofilm by Salmonella ser. Agona and E. coli O103:H2 under temperature conditions relevant for the food and feed industry as well as under temperature conditions optimum for growth. METHODS AND RESULTS Effect of F202 on biofilm formation by Salmonella ser. Agona and E. coli O103:H2 was evaluated using a microtiter plate assay and confocal microscopy. Effect of F202 on bacterial motility was investigated using swimming and swarming assays. Influence on flagellar synthesis by F202 was examined by flagellar staining. Results showed that F202 inhibited biofilm formation without being bactericidal. F202 was found to affect both swimming and swarming motility without, however, affecting the expression of flagella. CONCLUSIONS F202 showed its potential as a biofilm inhibitor of Salmonella ser. Agona and E. coli O103:H2 under temperature conditions relevant for the feed and food industry as well as temperatures optimum for growth. One potential mode of action of F202 was found to be by targeting flagellar function. SIGNIFICANCE AND IMPACT OF THE STUDY The present study gives valuable new knowledge to the potential use of furanones as a tool in biofilm management in the food and feed industry.
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Affiliation(s)
- L K Vestby
- Norwegian Veterinary Institute, Department of Laboratory Services, Section for Bacteriology- aquatic and terrestrial, Oslo, Norway
| | - K C S Johannesen
- Norwegian Veterinary Institute, Department of Laboratory Services, Section for Bacteriology- aquatic and terrestrial, Oslo, Norway
| | - I L Witsø
- Faculty of Dentistry, Department of Oral Biology, University of Oslo, Oslo, Norway
| | | | - A A Scheie
- Faculty of Dentistry, Department of Oral Biology, University of Oslo, Oslo, Norway
| | - A M Urdahl
- Norwegian Veterinary Institute, Department of Health Surveillance, Section for Veterinary Public Health, Oslo, Norway
| | - T Benneche
- Faculty of Mathematics and Natural Sciences, Department of Chemistry, University of Oslo, Oslo, Norway
| | | | - L L Nesse
- Norwegian Veterinary Institute, Department of Laboratory Services, Section for Bacteriology- aquatic and terrestrial, Oslo, Norway
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Bicyclic brominated furanones: a new class of quorum sensing modulators that inhibit bacterial biofilm formation. Bioorg Med Chem 2014; 22:1313-7. [PMID: 24485124 DOI: 10.1016/j.bmc.2014.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 12/21/2013] [Accepted: 01/02/2014] [Indexed: 11/20/2022]
Abstract
Both natural and synthetic brominated furanones are known to inhibit biofilm formation by bacteria, but their toxicity to mammalian cells is often not reported. Here, we designed and synthesized a new class of brominated furanones (BBFs) that contained a bicyclic structure having one bromide group with well-defined regiochemistry. This class of molecules exhibited reduction in the toxicity to mammalian cells (human neuroblastoma SK-N-SH) and did not inhibit bacteria (Pseudomonas aeruginosa and Escherichia coli) growth, but retained the inhibitory activity towards biofilm formation of bacteria. In addition, all the BBFs inhibited the production of virulence factor elastase B in P. aeruginosa. To explore the effect of BBFs on quorum sensing, we used a reporter gene assay and found that 6-BBF and 7-BBF exhibited antagonistic activities for LasR protein in the lasI quorum sensing circuit, while 5-BBF showed agonistic activity for the rhlI quorum sensing circuit. This study suggests that structural variation of brominated furanones can be designed for targeted functions to control biofilm formation.
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45
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Broderick AH, Stacy DM, Tal-Gan Y, Kratochvil MJ, Blackwell HE, Lynn DM. Surface coatings that promote rapid release of peptide-based AgrC inhibitors for attenuation of quorum sensing in Staphylococcus aureus. Adv Healthc Mater 2014; 3:97-105. [PMID: 23813683 DOI: 10.1002/adhm.201300119] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Indexed: 11/05/2022]
Abstract
Staphylococcus aureus is a major human pathogen responsible for a variety of life-threatening infections. The pathogenicity of this organism is attributed to its ability to produce a range of virulence factors and toxins, including the superantigen toxic shock syndrome toxin-1 (TSST-1). While many S. aureus infections can be treated using conventional antibiotics, strains resistant to these bactericidal agents have emerged. Approaches that suppress pathogenicity through mechanisms that are nonbactericidal (i.e., antivirulence approaches) could provide new options for treating infections, including those caused by resistant strains. Here, we report a nonbactericidal approach to suppressing pathogenicity based on the release of macrocyclic peptides (1 and 2) that inhibit the agr quorum sensing (QS) circuit in group-III S. aureus. It is demonstrated that these peptides can be immobilized on planar and complex objects (on glass slides, nonwoven meshes, or within absorbent tampons) using the rapidly dissolving polymer carboxymethylcellulose (CMC). Peptide-loaded CMC films released peptide rapidly (<5 min) and promoted strong (>95%) inhibition of the agr QS circuit without inducing cell death when incubated in the presence of a group-III S. aureus gfp-reporter strain. Peptide 1 is among the most potent inhibitors of QS in S. aureus reported to date, and the group-III QS circuit regulates production of TSST-1, the primary cause of toxic shock syndrome (TSS). These results thus suggest approaches to treat the outer covers of tampons, wound dressings, or other objects to suppress toxin production and reduce the severity of TSS in clinical and personal care contexts. Because peptide 1 also inhibits QS in S. aureus groups-I, -II, and -IV, this approach could also provide a pathway for attenuation of QS and associated virulence phenotypes in a broader range of contexts.
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Affiliation(s)
- Adam H Broderick
- Department of Chemical and Biological Engineering, 1415 Engineering Drive, University of Wisconsin-Madison, Madison, WI 53706, USA
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46
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Tran PL, Hamood AN, Reid TW. Antimicrobial Coatings to Prevent Biofilm Formation on Medical Devices. SPRINGER SERIES ON BIOFILMS 2014. [DOI: 10.1007/978-3-642-53833-9_9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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47
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Abstract
Cell-cell communication, or quorum sensing, is a widespread phenomenon in bacteria that is used to coordinate gene expression among local populations. Its use by bacterial pathogens to regulate genes that promote invasion, defense, and spread has been particularly well documented. With the ongoing emergence of antibiotic-resistant pathogens, there is a current need for development of alternative therapeutic strategies. An antivirulence approach by which quorum sensing is impeded has caught on as a viable means to manipulate bacterial processes, especially pathogenic traits that are harmful to human and animal health and agricultural productivity. The identification and development of chemical compounds and enzymes that facilitate quorum-sensing inhibition (QSI) by targeting signaling molecules, signal biogenesis, or signal detection are reviewed here. Overall, the evidence suggests that QSI therapy may be efficacious against some, but not necessarily all, bacterial pathogens, and several failures and ongoing concerns that may steer future studies in productive directions are discussed. Nevertheless, various QSI successes have rightfully perpetuated excitement surrounding new potential therapies, and this review highlights promising QSI leads in disrupting pathogenesis in both plants and animals.
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48
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Götz F, Perconti S, Popella P, Werner R, Schlag M. Epidermin and gallidermin: Staphylococcal lantibiotics. Int J Med Microbiol 2013; 304:63-71. [PMID: 24119540 DOI: 10.1016/j.ijmm.2013.08.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The Staphylococcus epidermidis derived epidermin was the first lantibiotic that has been shown to be ribosomally synthesized and posttranslationally modified. Together with gallidermin, produced by Staphylococcus gallinarum, they belong to the large class of cationic antimicrobial peptides (CAMPs) that act against a broad spectrum of Gram-positive bacteria. Here we describe the genetic organization, biosynthesis and modification, excretion, extracellular activation of the modified pre-peptide by proteolytic processing, self-protection of the producer, gene regulation, structure, and the mode of action of gallidermin and epidermin. We also address mechanisms of bacterial tolerance to these lantibiotics and other CAMPs. Particularly gallidermin has a high potential for therapeutic application, as it is active against methicillin-resistant Staphylococcus aureus strains (MRSA) and as it is able to prevent biofilm formation at sublethal concentrations.
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Affiliation(s)
- Friedrich Götz
- Microbial Genetics, Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany.
| | - Silvana Perconti
- Microbial Genetics, Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Peter Popella
- Microbial Genetics, Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Rolf Werner
- Microbial Genetics, Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Martin Schlag
- Microbial Genetics, Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
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49
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Staphylococcus aureus autoinducer-2 quorum sensing decreases biofilm formation in an icaR-dependent manner. BMC Microbiol 2012; 12:288. [PMID: 23216979 PMCID: PMC3539994 DOI: 10.1186/1471-2180-12-288] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/29/2012] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Staphylococcus aureus is an important pathogen that causes biofilm-associated infection in humans. Autoinducer 2 (AI-2), a quorum-sensing (QS) signal for interspecies communication, has a wide range of regulatory functions in both Gram-positive and Gram-negative bacteria, but its exact role in biofilm formation in S. aureus remains unclear. RESULTS Here we demonstrate that mutation of the AI-2 synthase gene luxS in S. aureus RN6390B results in increased biofilm formation compared with the wild-type (WT) strain under static, flowing and anaerobic conditions and in a mouse model. Addition of the chemically synthesized AI-2 precursor in the luxS mutation strain (ΔluxS) restored the WT phenotype. Real-time RT-PCR analysis showed that AI-2 activated the transcription of icaR, a repressor of the ica operon, and subsequently a decreased level of icaA transcription, which was presumably the main reason why luxS mutation influences biofilm formation. Furthermore, we compared the roles of the agr-mediated QS system and the LuxS/AI-2 QS system in the regulation of biofilm formation using the ΔluxS strain, RN6911 and the Δagr ΔluxS strain. Our data indicate a cumulative effect of the two QS systems on the regulation of biofilm formation in S. aureus. CONCLUSION These findings demonstrate that AI-2 can decrease biofilm formation in S. aureus via an icaR-activation pathway. This study may provide clues for therapy in S. aureus biofilm-associated infection.
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50
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Gomes J, Grunau A, Lawrence AK, Eberl L, Gademann K. Bioinspired, releasable quorum sensing modulators. Chem Commun (Camb) 2012; 49:155-7. [PMID: 23169441 DOI: 10.1039/c2cc37287h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate the synthesis and immobilization of natural product hybrids featuring an acyl-homoserine lactone and a nitrodopamine onto biocompatible TiO(2) surfaces through an operationally simple dip-and-rinse procedure. The resulting immobilized hybrids were shown to be powerful quorum sensing (QS) activators in Pseudomonas strains acting by slow release from the surface.
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Affiliation(s)
- José Gomes
- Department of Chemistry, NCCR Chemical Biology, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
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