251
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Santhakumar K, Viswanath V. Novel Methods for Efficacy Testing of Disinfectants – Part I. TENSIDE SURFACT DET 2019. [DOI: 10.3139/113.110597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Abstract
The pathogens which are the effective transmitters of various infections pose a serious problem in restraining their interference in maintaining a sterile environment. The practical applicability of traditional methods of disinfection is restricted due to their cumbersomeness, toxic product generation, and cost-effectiveness. Therefore, the objective of the current review is to elaborate the efficacies and limitations of various novel disinfectants that can show their activity in a few minutes of treatment. The expected outcome would be feasibility for selection of a favorable disinfectant through various technologies that can generate uniform results and form a basis for the true estimation required parameters. Hence, the current paper ends with the consideration of unique new techniques that distinguishes their simplicity, safety, and efficacy in generating a sterile environment.
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Affiliation(s)
| | - Valikala Viswanath
- Carbon dioxide Research and Green Technologies Center , VIT University, Tamil Nadu , India
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252
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Tüzüner T, Dimkov A, Nicholson JW. The effect of antimicrobial additives on the properties of dental glass-ionomer cements: a review. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2019; 5:9-21. [PMID: 30652117 PMCID: PMC6327935 DOI: 10.1080/23337931.2018.1539623] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022]
Abstract
Aim: The aim of this article is to review the literature on the use of antimicrobial additives in glass-ionomer dental cements. Method: An electronic search between 1987 and the end of 2017 was performed using PubMed, Web of Science and Google search engines with the terms glass-ionomer, glass polyalkenoate, antibacterial and antimicrobial as the key words. The search was refined by excluding the majority of references concerned with cement antimicrobial properties only. Extra papers already known to the authors were added to those considered. Results: A total of 92 relevant articles have been cited in the review of which 55 are specifically concerned with the enhancement of antibacterial properties of glass-ionomers, both conventional and resin-modified, with additives. In addition, information is included on the uses of glass-ionomers and the biological properties of the antibacterial additives employed. There are several reports that show that additives are typically released by diffusion, and that a high proportion is usually left behind, trapped in the cement. Additives generally increase setting times of cements, and reduce mechanical properties. However, smaller amounts of additive have only slight effects and the longer-term durability of cements appears unaffected. Conclusion: Modified glass-ionomer cements seem to be acceptable for clinical use, especially in the Atraumatic Restorative Treatment (ART) technique.
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Affiliation(s)
- Tamer Tüzüner
- Department of Paediatric Dentistry, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Aleksandar Dimkov
- Department of Paediatric and Preventive Dentistry, Faculty of Dental Medicine, St Cyril and St Methodius University, Skopje, Macedonia
| | - John W. Nicholson
- Bluefield Centre for Biomaterials, London, United Kingdom
- Dental Physical Sciences, Institute of Dentistry, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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253
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Hossain S, De Silva B, Dahanayake P, Shin GW, Heo GJ. MOLECULAR CHARACTERIZATION OF VIRULENCE, ANTIMICROBIAL RESISTANCE GENES, AND CLASS ONE INTEGRON GENE CASSETTES IN SALMONELLA ENTERICA SUBSP. ENTERICA ISOLATED FROM PET TURTLES IN SEOUL, KOREA. J Exot Pet Med 2019. [DOI: 10.1053/j.jepm.2018.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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254
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Cockcroft JK, Shamsabadi A, Wu H, Rennie AR. Understanding the structure and dynamics of cationic surfactants from studies of pure solid phases. Phys Chem Chem Phys 2019; 21:25945-25951. [DOI: 10.1039/c9cp04486h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unravelling the phase behaviour of n-alkyltrimethylammonium bromides (C10 to C18): from tight-packed interdigitation to rotational disorder with increasing temperature.
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Affiliation(s)
| | - André Shamsabadi
- Department of Chemistry
- Christopher Ingold Laboratories
- UCL
- London WC1H 0AJ
- UK
| | - Han Wu
- Department of Chemical Engineering
- UCL
- London WC1E 7JE
- UK
| | - Adrian R. Rennie
- Centre for Neutron Scattering
- Uppsala University
- 75120 Uppsala
- Sweden
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255
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Hao J, Lu ZS, Li CM, Xu LQ. A maltoheptaose-decorated BODIPY photosensitizer for photodynamic inactivation of Gram-positive bacteria. NEW J CHEM 2019. [DOI: 10.1039/c9nj02987g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A maltoheptaose-decorated BODIPY with high singlet oxygen generation efficacy was synthesized for photodynamic inactivation of Gram-positive bacteria in planktonic forms and biofilms.
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Affiliation(s)
- Jie Hao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Materials and Energy
- Southwest University
- Chongqing
| | - Zhi Song Lu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Materials and Energy
- Southwest University
- Chongqing
| | - Chang Ming Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Materials and Energy
- Southwest University
- Chongqing
| | - Li Qun Xu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Materials and Energy
- Southwest University
- Chongqing
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256
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El Enshasy HA, Joel D, Singh DP, Malek RA, Elsayed EA, Hanapi SZ, Kumar K. Mushrooms: New Biofactories for Nanomaterial Production of Different Industrial and Medical Applications. NANOTECHNOLOGY IN THE LIFE SCIENCES 2019:87-126. [DOI: 10.1007/978-3-030-16383-9_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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257
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Mixed systems based on the cationic surfactant with a butyl carbamate fragment and nonionic surfactant Tween 80: Aggregation behavior and solubilization properties. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2319-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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258
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Kontos RC, Schallenhammer SA, Bentley BS, Morrison KR, Feliciano JA, Tasca JA, Kaplan AR, Bezpalko MW, Kassel WS, Wuest WM, Minbiole KPC. An Investigation into Rigidity-Activity Relationships in BisQAC Amphiphilic Antiseptics. ChemMedChem 2018; 14:83-87. [PMID: 30358105 DOI: 10.1002/cmdc.201800622] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Indexed: 12/27/2022]
Abstract
Twenty-one mono- and biscationic quaternary ammonium amphiphiles (monoQACs and bisQACs) were rapidly prepared in order to investigate the effects of rigidity of a diamine core structure on antiseptic activity. As anticipated, the bioactivity against a panel of six bacteria including methicillin-resistant Staphylococcus aureus (MRSA) strains was strong for bisQAC structures, and is clearly correlated with the length of non-polar side chains. Modest advantages were noted for amide-containing side chains, as compared with straight-chained alkyl substituents. Surprisingly, antiseptics with more rigidly disposed side chains, such as those in DABCO-12,12, showed the highest level of antimicrobial activity, with single-digit MIC values or better against the entire bacterial panel, including sub-micromolar activity against an MRSA strain.
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Affiliation(s)
- Renee C Kontos
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
| | | | - Brian S Bentley
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
| | - Kelly R Morrison
- Department of Chemistry, Emory University, Atlanta, GA, 30322, USA
| | - Javier A Feliciano
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
| | - Julia A Tasca
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
| | - Anna R Kaplan
- Department of Chemistry, Emory University, Atlanta, GA, 30322, USA
| | - Mark W Bezpalko
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
| | - W Scott Kassel
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
| | - William M Wuest
- Department of Chemistry, Emory University, Atlanta, GA, 30322, USA
| | - Kevin P C Minbiole
- Department of Chemistry, Villanova University, Villanova, PA, 19085, USA
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259
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Valiei A, Okshevsky M, Lin N, Tufenkji N. Anodized Aluminum with Nanoholes Impregnated with Quaternary Ammonium Compounds Can Kill Pathogenic Bacteria within Seconds of Contact. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41207-41214. [PMID: 30395430 DOI: 10.1021/acsami.8b17634] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bacterial contamination of surfaces results in the spread of pathogens in public spaces such as hospitals and public transport. The development of antibacterial surfaces that rapidly kill bacteria is therefore highly desirable. Here, we investigate the antibacterial efficacy of a novel anodized aluminum surface featuring nanoholes impregnated with quaternary ammonium compounds, referred to as A3S. The antimicrobial activity of A3S was assessed using both Gram-positive and Gram-negative bacteria in a novel assay which simulates pathogen transfer from a contaminated "finger" to a clean finger in a real-world scenario. Enumeration of colony-forming units shows that the number of viable bacteria on the second "finger" contacting A3S is significantly reduced compared to a control surface. Furthermore, bacterial contact with the A3S material results in compromised cell membranes in less than 1 min, and a kill zone assay shows that an exposure time as short as 5 s is sufficient to kill pathogenic bacteria. The rapid antimicrobial action of A3S was particularly evident against Gram-positive bacteria, that account for more than 70% of nosocomial infections. Taken together, these findings demonstrate that A3S is a promising candidate for the fabrication of antibacterial surfaces that can be used in a wide range of clinical and commercial applications to stop the spread of harmful bacteria.
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Affiliation(s)
- Amin Valiei
- Department of Chemical Engineering , McGill University , 3610 University Street , Montréal , Québec H3A 0C5 , Canada
| | - Mira Okshevsky
- Department of Chemical Engineering , McGill University , 3610 University Street , Montréal , Québec H3A 0C5 , Canada
| | - Nicholas Lin
- Department of Chemical Engineering , McGill University , 3610 University Street , Montréal , Québec H3A 0C5 , Canada
| | - Nathalie Tufenkji
- Department of Chemical Engineering , McGill University , 3610 University Street , Montréal , Québec H3A 0C5 , Canada
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260
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Oh JK, Yegin Y, Yang F, Zhang M, Li J, Huang S, Verkhoturov SV, Schweikert EA, Perez-Lewis K, Scholar EA, Taylor TM, Castillo A, Cisneros-Zevallos L, Min Y, Akbulut M. The influence of surface chemistry on the kinetics and thermodynamics of bacterial adhesion. Sci Rep 2018; 8:17247. [PMID: 30467352 PMCID: PMC6250697 DOI: 10.1038/s41598-018-35343-1] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 10/29/2018] [Indexed: 11/29/2022] Open
Abstract
This work is concerned with investigating the effect of substrate hydrophobicity and zeta potential on the dynamics and kinetics of the initial stages of bacterial adhesion. For this purpose, bacterial pathogens Staphylococcus aureus and Escherichia coli O157:H7 were inoculated on the substrates coated with thin thiol layers (i.e., 1-octanethiol, 1-decanethiol, 1-octadecanethiol, 16-mercaptohexadecanoic acid, and 2-aminoethanethiol hydrochloride) with varying hydrophobicity and surface potential. The time-resolved adhesion data revealed a transformation from an exponential dependence to a square root dependence on time upon changing the substrate from hydrophobic or hydrophilic with a negative zeta potential value to hydrophilic with a negative zeta potential for both pathogens. The dewetting of extracellular polymeric substances (EPS) produced by E. coli O157:H7 was more noticeable on hydrophobic substrates, compared to that of S. aureus, which is attributed to the more amphiphilic nature of staphylococcal EPS. The interplay between the timescale of EPS dewetting and the inverse of the adhesion rate constant modulated the distribution of E. coli O157:H7 within microcolonies and the resultant microcolonial morphology on hydrophobic substrates. Observed trends in the formation of bacterial monolayers rather than multilayers and microcolonies rather than isolated and evenly spaced bacterial cells could be explained by a colloidal model considering van der Waals and electrostatic double-layer interactions only after introducing the contribution of elastic energy due to adhesion-induced deformations at intercellular and substrate-cell interfaces. The gained knowledge is significant in the context of identifying surfaces with greater risk of bacterial contamination and guiding the development of novel surfaces and coatings with superior bacterial antifouling characteristics.
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Affiliation(s)
- Jun Kyun Oh
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, 77843, USA
| | - Yagmur Yegin
- Department of Nutrition and Food Science, Texas A&M University, College Station, Texas, 77843, USA
| | - Fan Yang
- Department of Chemistry, Texas A&M University, College Station, Texas, 77843, USA
| | - Ming Zhang
- Department of Polymer Engineering, University of Akron, Akron, Ohio, 44325, USA
| | - Jingyu Li
- Department of Polymer Engineering, University of Akron, Akron, Ohio, 44325, USA
| | - Shifeng Huang
- Department of Polymer Engineering, University of Akron, Akron, Ohio, 44325, USA
| | | | - Emile A Schweikert
- Department of Chemistry, Texas A&M University, College Station, Texas, 77843, USA
| | - Keila Perez-Lewis
- Department of Animal Science, Texas A&M University, College Station, Texas, 77843, USA
| | - Ethan A Scholar
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, 77843, USA
| | - T Matthew Taylor
- Department of Animal Science, Texas A&M University, College Station, Texas, 77843, USA
| | - Alejandro Castillo
- Department of Animal Science, Texas A&M University, College Station, Texas, 77843, USA
| | - Luis Cisneros-Zevallos
- Department of Horticultural Sciences, Texas A&M University, College Station, Texas, 77843, USA
| | - Younjin Min
- Department of Polymer Engineering, University of Akron, Akron, Ohio, 44325, USA.
| | - Mustafa Akbulut
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, 77843, USA.
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas, 77843, USA.
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261
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Cationic surfactants as antifungal agents. Appl Microbiol Biotechnol 2018; 103:97-112. [PMID: 30374671 DOI: 10.1007/s00253-018-9467-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 10/21/2018] [Indexed: 10/28/2022]
Abstract
Fungi-in being responsible for causing diseases in animals and humans as well as environmental contaminations in health and storage facilities-represent a serious concern to health security. Surfactants are a group of chemical compounds used in a broad spectrum of applications. The recently considered potential employment of cationic surfactants as antifungal or fungistatic agents has become a prominent issue in the development of antifungal strategies, especially if such surface-active agents can be synthesized in an eco-friendly manner. In this review, we describe the antifungal effect and the reported mechanisms of action of several types of cationic surfactants and also include a discussion of the contribution of these surfactants to the inhibition of yeast-based-biofilm formation. Furthermore, the putative mechanism of arginine-based tensioactive compounds as antifungal agents and their applications are also analyzed.
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262
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Vijayakumar R, Sandle T. A review on biocide reduced susceptibility due to plasmid‐borne antiseptic‐resistant genes—special notes on pharmaceutical environmental isolates. J Appl Microbiol 2018; 126:1011-1022. [DOI: 10.1111/jam.14118] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 09/24/2018] [Accepted: 09/25/2018] [Indexed: 12/22/2022]
Affiliation(s)
- R. Vijayakumar
- Department of Biology College of Science in Zulfi, Majmaah University Majmaah Saudi Arabia
| | - T. Sandle
- Bio Products Laboratory Elstree, Hertfordshire UK
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263
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Torres NS, Montelongo-Jauregui D, Abercrombie JJ, Srinivasan A, Lopez-Ribot JL, Ramasubramanian AK, Leung KP. Antimicrobial and Antibiofilm Activity of Synergistic Combinations of a Commercially Available Small Compound Library With Colistin Against Pseudomonas aeruginosa. Front Microbiol 2018; 9:2541. [PMID: 30410476 PMCID: PMC6209680 DOI: 10.3389/fmicb.2018.02541] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/04/2018] [Indexed: 01/21/2023] Open
Abstract
Biofilm-associated Pseudomonas aeruginosa infections remain a significant clinical challenge since the conventional antibiotic treatment or combination therapies are largely ineffective; and new approaches are needed. To circumvent the major challenges associated with discovery of new antimicrobials, we have screened a library of compounds that are commercially available and approved by the FDA (Prestwick Chemical Library) against P. aeruginosa for effective antimicrobial and anti-biofilm activity. A preliminary screen of the Prestwick Chemical Library alone did not yield any repositionable candidates, but in a screen of combinations with a fixed sub-inhibitory concentration of the antibiotic colistin we observed 10 drugs whose bacterial inhibiting activity was reproducibly enhanced, seven of which were enhanced by more than 50%. We performed checkerboard assays of these seven drugs in combination with colistin against planktonic cells, and analysis of their interactions over the complete combination matrix using the Zero Interaction Potency (ZIP) model revealed interactions that varied from highly synergistic to completely antagonistic. Of these, five combinations that showed synergism were down-selected and tested against preformed biofilms of P. aeruginosa. Two of the five combinations were active against preformed biofilms of both laboratory and clinical strain of P. aeruginosa, resulting in a 2-log reduction in culturable cells. In summary, we have identified synergistic combinations of five commercially available, FDA-approved drugs and colistin that show antimicrobial activity against planktonic P. aeruginosa (Clomiphene Citrate, Mitoxantrone Dihydrochloride, Methyl Benzethonium Chloride, Benzethonium Chloride, and Auranofin) as well as two combinations (Auranofin and Clomiphene Citrate) with colistin that show antibiofilm activity.
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Affiliation(s)
- Nelson S Torres
- Dental and Craniofacial Trauma Research and Tissue Regeneration Directorate, Institute of Surgical Research, San Antonio, TX, United States.,Department of Biomedical Engineering, The University of Texas at San Antonio, San Antonio, TX, United States
| | - Daniel Montelongo-Jauregui
- Department of Biology, South Texas Center for Emerging Infectious Diseases, The University of Texas at San Antonio, San Antonio, TX, United States
| | - Johnathan J Abercrombie
- Dental and Craniofacial Trauma Research and Tissue Regeneration Directorate, Institute of Surgical Research, San Antonio, TX, United States
| | - Anand Srinivasan
- Department of Biomedical Engineering, The University of Texas at San Antonio, San Antonio, TX, United States.,Department of Biology, South Texas Center for Emerging Infectious Diseases, The University of Texas at San Antonio, San Antonio, TX, United States
| | - Jose L Lopez-Ribot
- Department of Biology, South Texas Center for Emerging Infectious Diseases, The University of Texas at San Antonio, San Antonio, TX, United States
| | - Anand K Ramasubramanian
- Department of Chemical and Materials Engineering, San José State University, San José, CA, United States
| | - Kai P Leung
- Dental and Craniofacial Trauma Research and Tissue Regeneration Directorate, Institute of Surgical Research, San Antonio, TX, United States
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264
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Hébert A, Parisotto M, Ferbeyre G, Schmitzer AR. Membrane permeabilization and perturbation induced by alkyl- biguanidium salts. Supramol Chem 2018. [DOI: 10.1080/10610278.2018.1535710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Audrey Hébert
- Département de Chimie - Faculté des Arts et des Sciences, Université de Montréal, Montréal, Québec, Canada
| | - Maxime Parisotto
- Département de Chimie - Faculté des Arts et des Sciences, Université de Montréal, Montréal, Québec, Canada
| | - Gerardo Ferbeyre
- Département de Biochimie et Médecine Moléculaire - Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada
| | - Andreea R. Schmitzer
- Département de Chimie - Faculté des Arts et des Sciences, Université de Montréal, Montréal, Québec, Canada
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265
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Fletcher JT, Sobczyk JM, Gwazdacz SC, Blanck AJ. Antimicrobial 1,3,4-trisubstituted-1,2,3-triazolium salts. Bioorg Med Chem Lett 2018; 28:3320-3323. [PMID: 30219525 DOI: 10.1016/j.bmcl.2018.09.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/06/2018] [Accepted: 09/09/2018] [Indexed: 11/18/2022]
Abstract
A series of 1,3,4-trisubstituted-1,2,3-triazolium bromide salts were prepared by efficient two-step sequences of azide-alkyne cycloaddition and benzylic substitution. The antimicrobial activity of each triazolium salt and correlating triazole precursor was evaluated using a minimum inhibitory concentration (MIC) assay. MIC activities as low as 1 µM against Gram-positive bacteria, 8 µM against Gram-negative bacteria and 4 µM against fungi were observed for salt analogs, while neutral triazoles were inactive. Analogs representing selective and broad-spectrum antimicrobial activity were each identified. MIC structure-activity relationships observed within this motif indicate that the presence of cationic charge and balance of overall hydrophobicity are strongly impactful, while benzyl vs. aryl substituent identity and variation of substituent regiochemistry are not.
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Affiliation(s)
- James T Fletcher
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, USA.
| | - Jill M Sobczyk
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, USA
| | - Sarah C Gwazdacz
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, USA
| | - Aaron J Blanck
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, USA
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266
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Dahl JE, Stenhagen IS. Optimizing quality and safety of dental materials. Eur J Oral Sci 2018; 126 Suppl 1:102-105. [DOI: 10.1111/eos.12422] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/23/2018] [Indexed: 01/15/2023]
Affiliation(s)
- Jon E. Dahl
- Nordic Institute of Dental Materials (NIOM) Oslo Norway
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267
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Yordanova S, Vasileva-Tonkova E, Staneva D, Stoyanov S, Grabchev I. Synthesis and characterization of new water soluble 9,10-anthraquinonе and evaluation of its antimicrobial activity. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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268
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Benedetto A, Ballone P. Room-Temperature Ionic Liquids and Biomembranes: Setting the Stage for Applications in Pharmacology, Biomedicine, and Bionanotechnology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9579-9597. [PMID: 29510045 DOI: 10.1021/acs.langmuir.7b04361] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Empirical evidence and conceptual elaboration reveal and rationalize the remarkable affinity of organic ionic liquids for biomembranes. Cations of the so-called room-temperature ionic liquids (RTILs), in particular, are readily absorbed into the lipid fraction of biomembranes, causing a variety of observable biological effects, including generic cytotoxicity, broad antibacterial potential, and anticancer activity. Chemical physics analysis of model systems made of phospholipid bilayers, RTIL ions, and water confirm and partially explain this evidence, quantifying the mild destabilizing effect of RTILs on the structural, dynamic, and thermodynamic properties of lipids in biomembranes. Our Feature Article presents a brief introduction to these systems and to their roles in biophysics and biotechnology, summarizing recent experimental and computational results on their properties. More importantly, it highlights the many developments in pharmacology, biomedicine, and bionanotechnology expected from the current research effort on this topic. To anticipate future developments, we speculate on (i) potential applications of (magnetic) RTILs to affect and control the rheology of cells and biological tissues, of great relevance for diagnostics and (ii) the use of RTILs to improve the durability, reliability, and output of biomimetic photovoltaic devices.
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Affiliation(s)
- Antonio Benedetto
- Laboratory for Neutron Scattering , Paul Scherrer Institute , Villigen 5232 , Switzerland
- Conway Institute of Biomolecular and Biomedical Research , University College Dublin , Dublin 4 , Ireland
| | - Pietro Ballone
- Italian Institute of Technology , Via Morego 30 , 16163 Genova , Italy
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269
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Hu S, Meyer B, Duggal M. A silver renaissance in dentistry. Eur Arch Paediatr Dent 2018; 19:221-227. [DOI: 10.1007/s40368-018-0363-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/19/2018] [Indexed: 02/04/2023]
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270
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Dhand C, Balakrishnan Y, Ong ST, Dwivedi N, Venugopal JR, Harini S, Leung CM, Low KZW, Loh XJ, Beuerman RW, Ramakrishna S, Verma NK, Lakshminarayanan R. Antimicrobial quaternary ammonium organosilane cross-linked nanofibrous collagen scaffolds for tissue engineering. Int J Nanomedicine 2018; 13:4473-4492. [PMID: 30122921 PMCID: PMC6080871 DOI: 10.2147/ijn.s159770] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Introduction In search for cross-linkers with multifunctional characteristics, the present work investigated the utility of quaternary ammonium organosilane (QOS) as a potential cross-linker for electrospun collagen nanofibers. We hypothesized that the quaternary ammonium ions improve the electrospinnability by reducing the surface tension and confer antimicrobial properties, while the formation of siloxane after alkaline hydrolysis could cross-link collagen and stimulate cell proliferation. Materials and methods QOS collagen nanofibers were electrospun by incorporating various concentrations of QOS (0.1%–10% w/w) and were cross-linked in situ after exposure to ammonium carbonate. The QOS cross-linked scaffolds were characterized and their biological properties were evaluated in terms of their biocompatibility, cellular adhesion and metabolic activity for primary human dermal fibroblasts and human fetal osteoblasts. Results and discussion The study revealed that 1) QOS cross-linking increased the flexibility of otherwise rigid collagen nanofibers and improved the thermal stability; 2) QOS cross-linked mats displayed potent antibacterial activity and 3) the biocompatibility of the composite mats depended on the amount of QOS present in dope solution – at low QOS concentrations (0.1% w/w), the mats promoted mammalian cell proliferation and growth, whereas at higher QOS concentrations, cytotoxic effect was observed. Conclusion This study demonstrates that QOS cross-linked mats possess anti-infective properties and confer niches for cellular growth and proliferation, thus offering a useful approach, which is important for hard and soft tissue engineering and regenerative medicine.
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Affiliation(s)
- Chetna Dhand
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, Discovery Tower, Singapore, , .,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore,
| | | | - Seow Theng Ong
- Dermatology and Skin Biology, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore,
| | - Neeraj Dwivedi
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore
| | - Jayarama R Venugopal
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang, Malaysia
| | - Sriram Harini
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, Discovery Tower, Singapore, ,
| | - Chak Ming Leung
- Department of Bioengineering, National University of Singapore, Singapore
| | - Kenny Zhi Wei Low
- Department of Mechanical Engineering, Faculty of Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore
| | - Xian Jun Loh
- Department of Mechanical Engineering, Faculty of Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore
| | - Roger W Beuerman
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, Discovery Tower, Singapore, , .,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore,
| | - Seeram Ramakrishna
- Soft Materials Department, Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research, Singapore
| | - Navin Kumar Verma
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, Discovery Tower, Singapore, , .,Dermatology and Skin Biology, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore,
| | - Rajamani Lakshminarayanan
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, Discovery Tower, Singapore, , .,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore,
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271
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Sousa-Silva M, Simões M, Melo L, Machado I. Pseudomonas fluorescens tolerance to benzyldimethyldodecyl ammonium chloride: Altered phenotype and cross-resistance. J Glob Antimicrob Resist 2018; 15:188-195. [PMID: 30026133 DOI: 10.1016/j.jgar.2018.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/22/2018] [Accepted: 07/08/2018] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Benzyldimethyldodecyl ammonium chloride (BDMDAC) is a quaternary ammonium compound (QAC) with bactericidal action that is used as an active molecule in detergent formulations. Pseudomonas fluorescens is a Gram-negative bacterium with versatile metabolism that is frequently present in biofilms on industrial surfaces. This work reports P. fluorescens adaptation to BDMDAC and subsequent concurrent reduced susceptibility to the QAC benzalkonium chloride (BAC) and the antimicrobial ciprofloxacin (CIP). METHODS Stepwise adaptation to increasing concentrations of BDMDAC was easily achieved and caused changes in the bacterial phenotype of P. fluorescens. Adaptation was evaluated through minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) determination and was subsequently confirmed by time-kill curves. Biofilm phenotype (biomass and number of cells) was characterised for the adapted and reference strains after treatment with BDMDAC, BAC and CIP. RESULTS Susceptibility to BAC and CIP was reduced in adapted P. fluorescens. Biofilms developed by the adapted strain had 20% more mass and a higher number of bacteria (2 log). CONCLUSIONS This study revealed that exposure to sublethal concentrations of BDMDAC may select tolerant strains to that product as well as to related products and unrelated antimicrobial agents.
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Affiliation(s)
- Maria Sousa-Silva
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Manuel Simões
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Luís Melo
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Idalina Machado
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr Roberto Frias, s/n, 4200-465 Porto, Portugal.
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272
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Matharu RK, Ciric L, Edirisinghe M. Nanocomposites: suitable alternatives as antimicrobial agents. NANOTECHNOLOGY 2018; 29:282001. [PMID: 29620531 DOI: 10.1088/1361-6528/aabbff] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The exploration of nanocomposites has gained a strong research following over the last decade. These materials have been heavily exploited in several fields, with applications ranging from biosensors to biomedicine. Among these applications, great advances have been made in the field of microbiology, specifically as antimicrobial agents. This review aims to provide a comprehensive account of various nanocomposites that elucidate promising antimicrobial activity. The composition, physical and chemical properties, as well as the antimicrobial performance of these nanocomposites, are discussed in detail.
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Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom. Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London, WC1E 6BT, United Kingdom
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273
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Tolosa J, Serrano de las Heras G, Carrión B, Segura T, Páez PL, de Lera-Garrido FJ, Rodríguez-López J, García-Martínez JC. Structure-Activity Relationships for Poly(phenylene)vinylene Derivatives as Antibacterial Agents. ChemistrySelect 2018. [DOI: 10.1002/slct.201801287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Juan Tolosa
- Departamento de Química Orgánica, Inorgánica y Bioquímica; Facultad de Farmacia; Universidad de Castilla-La Mancha; Avda. José María Sánchez Ibáñez s/n 02008 Albacete Spain
| | - Gemma Serrano de las Heras
- Unidad de Investigación y Servicio de Neurología del Complejo Hospitalario Universitario de Albacete; 02006 Albacete Spain
| | - Blanca Carrión
- Unidad de Investigación y Servicio de Neurología del Complejo Hospitalario Universitario de Albacete; 02006 Albacete Spain
| | - Tomás Segura
- Unidad de Investigación y Servicio de Neurología del Complejo Hospitalario Universitario de Albacete; 02006 Albacete Spain
| | - Paulina L. Páez
- Departamento de Farmacia; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Unidad de Tecnología Farmacéutica (UNITEFA) - CONICET; Haya de la Torre y Medina Allende X5000HUA Córdoba Argentina
| | - Fernando J. de Lera-Garrido
- Departamento de Química Orgánica, Inorgánica y Bioquímica; Facultad de Farmacia; Universidad de Castilla-La Mancha; Avda. José María Sánchez Ibáñez s/n 02008 Albacete Spain
| | - Julián Rodríguez-López
- Departamento de Química Orgánica, Inorgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas; Universidad de Castilla-La Mancha; Avda. Camilo José Cela 10 1071 Ciudad Real Spain
| | - Joaquín C. García-Martínez
- Departamento de Química Orgánica, Inorgánica y Bioquímica; Facultad de Farmacia; Universidad de Castilla-La Mancha; Avda. José María Sánchez Ibáñez s/n 02008 Albacete Spain
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274
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Duan YC, Feng J, Bai N, Li GH, Zhang KQ, Zhao PJ. Four novel antibacterial sesquiterpene-α-amino acid quaternary ammonium hybrids from the mycelium of mushroom Stereum hirsutum. Fitoterapia 2018; 128:213-217. [DOI: 10.1016/j.fitote.2018.05.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/18/2018] [Accepted: 05/19/2018] [Indexed: 10/16/2022]
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275
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Fumagalli L, Regazzoni LG, Straniero V, Valoti E, Aldini G, Vistoli G, Carini M, Picozzi C. Stressed degradation studies of domiphen bromide by LC-ESI-MS/MS identify a novel promising antimicrobial agent. J Pharm Biomed Anal 2018; 159:224-228. [PMID: 29990889 DOI: 10.1016/j.jpba.2018.06.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 11/17/2022]
Abstract
Nowadays, parabens have been replaced by domiphen bromide, which is widely used in pharmaceutical and cosmetic products. The main aim of this study was to investigate stressed degradation products of domiphen bromide by mean of a rapid, specific and reliable LC-ESI MS/MS since phenyl bromination may occur due to the oxidation of bromide counter ion under oxidative conditions. LC-ESI-MS/MS have characterized a new compound, p-bromodomiphen, as the only degradation product and structure elucidation was also confirmed by the synthesis of the standard. Notably, the resulting p-bromodomiphen bromide is more stable then domiphen bromide in oxidizing conditions since no di-bromoderivatives were detected by MS studies; both domiphen and its p-bromo derivative were tested for antibacterial activity and were more effective on Gram positive (Staphylococcus aureus ATCC25923 and Bacillus cereus DSM31) compared to Gram negative bacteria (Escherichia coli ATCC25922 and Pseudomonas aeruginosa DSM22644). In conclusion, stressed degradation studies by LC-ESI-MS/MS have characterized a new compound that comprises an alternative to domiphen bromide since its antimicrobial activity is comparable to, if not better than, the parental compound.
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Affiliation(s)
- Laura Fumagalli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy.
| | - Luca Giovanni Regazzoni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy
| | - Valentina Straniero
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy
| | - Ermanno Valoti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy
| | - Giancarlo Aldini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy
| | - Giulio Vistoli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy
| | - Marina Carini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via Mangiagalli 25, I-20133, Milano, Italy
| | - Claudia Picozzi
- Dipartimento di Scienze per gli Alimenti, la Nutrizione e l'Ambiente, Università degli Studi di Milano, Via Celoria 2, Milano, Italy
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276
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Halla N, Fernandes IP, Heleno SA, Costa P, Boucherit-Otmani Z, Boucherit K, Rodrigues AE, Ferreira ICFR, Barreiro MF. Cosmetics Preservation: A Review on Present Strategies. Molecules 2018; 23:E1571. [PMID: 29958439 PMCID: PMC6099538 DOI: 10.3390/molecules23071571] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 06/24/2018] [Accepted: 06/26/2018] [Indexed: 12/17/2022] Open
Abstract
Cosmetics, like any product containing water and organic/inorganic compounds, require preservation against microbial contamination to guarantee consumer’s safety and to increase their shelf-life. The microbiological safety has as main goal of consumer protection against potentially pathogenic microorganisms, together with the product’s preservation resulting from biological and physicochemical deterioration. This is ensured by chemical, physical, or physicochemical strategies. The most common strategy is based on the application of antimicrobial agents, either by using synthetic or natural compounds, or even multifunctional ingredients. Current validation of a preservation system follow the application of good manufacturing practices (GMPs), the control of the raw material, and the verification of the preservative effect by suitable methodologies, including the challenge test. Among the preservatives described in the positive lists of regulations, there are parabens, isothiasolinone, organic acids, formaldehyde releasers, triclosan, and chlorhexidine. These chemical agents have different mechanisms of antimicrobial action, depending on their chemical structure and functional group’s reactivity. Preservatives act on several cell targets; however, they might present toxic effects to the consumer. Indeed, their use at high concentrations is more effective from the preservation viewpoint being, however, toxic for the consumer, whereas at low concentrations microbial resistance can develop.
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Affiliation(s)
- Noureddine Halla
- Antibiotics Antifungal Laboratory, Physical Chemistry, Synthesis and Biological Activity (LAPSAB), Department of Biology, Faculty of Sciences, University of Tlemcen, BP 119, 13000 Tlemcen, Algeria.
- Laboratory of Biotoxicology, Pharmacognosy and Biological Recovery of Plants, Department of Biology, Faculty of Sciences, University of Moulay-Tahar, 20000 Saida, Algeria.
| | - Isabel P Fernandes
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Polytechnic Institute of Bragança, Campus Santa Apolónia, 5301-253 Bragança, Portugal.
| | - Sandrina A Heleno
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Polytechnic Institute of Bragança, Campus Santa Apolónia, 5301-253 Bragança, Portugal.
| | - Patrícia Costa
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
| | - Zahia Boucherit-Otmani
- Antibiotics Antifungal Laboratory, Physical Chemistry, Synthesis and Biological Activity (LAPSAB), Department of Biology, Faculty of Sciences, University of Tlemcen, BP 119, 13000 Tlemcen, Algeria.
| | - Kebir Boucherit
- Antibiotics Antifungal Laboratory, Physical Chemistry, Synthesis and Biological Activity (LAPSAB), Department of Biology, Faculty of Sciences, University of Tlemcen, BP 119, 13000 Tlemcen, Algeria.
| | - Alírio E Rodrigues
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
| | - Isabel C F R Ferreira
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.
| | - Maria Filomena Barreiro
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Polytechnic Institute of Bragança, Campus Santa Apolónia, 5301-253 Bragança, Portugal.
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277
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Kurtz IS, Schiffman JD. Current and Emerging Approaches to Engineer Antibacterial and Antifouling Electrospun Nanofibers. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1059. [PMID: 29932127 PMCID: PMC6073658 DOI: 10.3390/ma11071059] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 06/18/2018] [Accepted: 06/19/2018] [Indexed: 11/16/2022]
Abstract
From ship hulls to bandages, biological fouling is a ubiquitous problem that impacts a wide range of industries and requires complex engineered solutions. Eliciting materials to have antibacterial or antifouling properties describes two main approaches to delay biofouling by killing or repelling bacteria, respectively. In this review article, we discuss how electrospun nanofiber mats are blank canvases that can be tailored to have controlled interactions with biologics, which would improve the design of intelligent conformal coatings or freestanding meshes that deliver targeted antimicrobials or cause bacteria to slip off surfaces. Firstly, we will briefly discuss the established and emerging technologies for addressing biofouling through antibacterial and antifouling surface engineering, and then highlight the recent advances in incorporating these strategies into electrospun nanofibers. These strategies highlight the potential for engineering electrospun nanofibers to solicit specific microbial responses for human health and environmental applications.
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Affiliation(s)
- Irene S Kurtz
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, MA 01003-9303, USA.
| | - Jessica D Schiffman
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, MA 01003-9303, USA.
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278
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Antimicrobial Resistance to Agents Used for Staphylococcus aureus Decolonization: Is There a Reason for Concern? Curr Infect Dis Rep 2018; 20:26. [PMID: 29882094 DOI: 10.1007/s11908-018-0630-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
PURPOSE OF REVIEW Chlorhexidine gluconate (CHG) and mupirocin are increasingly used for Staphylococcus aureus decolonization to prevent healthcare-associated infections; however, increased use of these agents has led to concerns for growing resistance and reduced efficacy. In this review, we describe current understanding of reduced susceptibility to CHG and mupirocin in S. aureus and their potential clinical implications. RECENT FINDINGS While emergence of S. aureus tolerant or resistant to topical antimicrobial agents used for decolonization is well described, the clinical impact of reduced susceptibility is not clear. Important challenges are that standardized methods of resistance testing and interpretation are not established, and the risk for selection for co- or cross-resistance using universal, as opposed to targeted decolonization, is unclear. Evidence continues to support S. aureus decolonization in certain patient groups, although further studies are needed to determine the long-term impact of CHG and mupirocin resistance on efficacy. Strategies to mitigate further development of reduced susceptibility and the consequences of selection pressures through universal decolonization on resistance will benefit from further investigation.
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279
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Sahareen T, Dey P, Mukherjee S, Das G, Ramesh A. Potential of Pyridine Amphiphiles as Staphylococcal Nuclease Inhibitor. Chembiochem 2018; 19:1400-1408. [DOI: 10.1002/cbic.201800032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Tabassum Sahareen
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
| | - Poulomi Dey
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
| | - Sandipan Mukherjee
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
| | - Gopal Das
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
| | - Aiyagari Ramesh
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
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280
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Increased Usage of Antiseptics Is Associated with Reduced Susceptibility in Clinical Isolates of Staphylococcus aureus. mBio 2018; 9:mBio.00894-18. [PMID: 29844113 PMCID: PMC5974466 DOI: 10.1128/mbio.00894-18] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Hospital-acquired infection is a major cause of morbidity and mortality, and regimes to prevent infection are crucial in infection control. These include the decolonization of vulnerable patients with methicillin-resistant Staphylococcus aureus (MRSA) carriage using antiseptics, including chlorhexidine and octenidine. Concern has been raised, however, regarding the possible development of biocide resistance. In this study, we assembled a panel of S. aureus isolates, including isolates collected before the development of chlorhexidine and octenidine and isolates, from a major hospital trust in the United Kingdom during a period when the decolonization regimes were altered. We observed significant increases in the MIC and minimum bactericidal concentration (MBC) of chlorhexidine in isolates from periods of high usage of chlorhexidine. Isolates with increased MICs and MBCs of octenidine rapidly emerged after octenidine was introduced in the trust. There was no apparent cross-resistance between the two biocidal agents. A combination of variable-number tandem repeat (VNTR) analysis, PCR for qac genes, and whole-genome sequencing was used to type isolates and examine possible mechanisms of resistance. There was no expansion of a single strain associated with decreased biocide tolerance, and biocide susceptibility did not correlate with carriage of qac efflux pump genes. Mutations within the NorA or NorB efflux pumps, previously associated with chlorhexidine export, were identified, however, suggesting that this may be an important mechanism of biocide tolerance. We present evidence that isolates are evolving in the face of biocide challenge in patients and that changes in decolonization regimes are reflected in changes in susceptibility of isolates. Infection in hospitals remains a major cause of death and disease. One way in which we combat this is by decolonizing at-risk patients from carriage of bacteria which can cause disease such as MRSA. This is done with antiseptics, including chlorhexidine and octenidine. There is concern, however, that bacteria may be able to become resistant to these antiseptics. In this study, we looked at isolates of MRSA and found that there was a correlation between the use of antiseptics and increased resistance in the isolates. We also suggest that the mechanism by which these more tolerant isolates may become resistant to antiseptics is that of changing a transport pump that exports these agents. This information suggests that we need to study the impact of antiseptics on clinically important bacteria more closely.
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281
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Koziróg A, Otlewska A, Brycki B. Viability, Enzymatic and Protein Profiles of Pseudomonas aeruginosa Biofilm and Planktonic Cells after Monomeric/Gemini Surfactant Treatment. Molecules 2018; 23:molecules23061294. [PMID: 29843448 PMCID: PMC6100048 DOI: 10.3390/molecules23061294] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/23/2018] [Accepted: 05/26/2018] [Indexed: 11/24/2022] Open
Abstract
This study set out to investigate the biological activity of monomeric surfactants dodecyltrimethylammonium bromide (DTAB) and the next generation gemini surfactant hexamethylene-1,6-bis-(N,N-dimethyl-N-dodecylammonium bromide) (C6) against the environmental strain Pseudomonas aeruginosa PB_1. Minimal inhibitory concentrations (MIC) were determined using the dilution method. The viability of the planktonic cells and biofilm was assessed using the plate count method. Enzymatic profile was determined using the API-ZYM system. Proteins were extracted from the biofilm and planktonic cells and analysed using SDS-PAGE. The MIC of the gemini surfactants was 70 times lower than that of its monomeric analogue. After 4 h of treatment at MIC (0.0145 mM for C6 and 1.013 mM for DTAB), the number of viable planktonic cells was reduce by less than 3 logarithm units. At the concentration ≥MIC, a reduction in the number of viable cells was observed in mature biofilms (p < 0.05). Treatment for 4 h with gemini surfactant at 20 MIC caused complete biofilm eradication. At sub-MIC, the concentration of some enzymes reduced and their protein profiles changed. The results of this study show that due to its superior antibacterial activity, gemini compound C6 can be applied as an effective microbiocide against P. aeruginosa in both planktonic and biofilm forms.
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Affiliation(s)
- Anna Koziróg
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Science, Lodz University of Technology, Wólczańska 171/173, 90-924 Lodz, Poland.
| | - Anna Otlewska
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Science, Lodz University of Technology, Wólczańska 171/173, 90-924 Lodz, Poland.
| | - Bogumił Brycki
- Laboratory of Microbiocides Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614 Poznan, Poland.
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282
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Konai MM, Bhattacharjee B, Ghosh S, Haldar J. Recent Progress in Polymer Research to Tackle Infections and Antimicrobial Resistance. Biomacromolecules 2018; 19:1888-1917. [PMID: 29718664 DOI: 10.1021/acs.biomac.8b00458] [Citation(s) in RCA: 160] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Global health is increasingly being threatened by the rapid emergence of drug-resistant microbes. The ability of these microbes to form biofilms has further exacerbated the scenario leading to notorious infections that are almost impossible to treat. For addressing this clinical threat, various antimicrobial polymers, polymer-based antimicrobial hydrogels and polymer-coated antimicrobial surfaces have been developed in the recent past. This review aims to discuss such polymer-based antimicrobial strategies with a focus on their current advancement in the field. Antimicrobial polymers, whose designs are inspired from antimicrobial peptides (AMPs), are described with an emphasis on structure-activity analysis. Additionally, antibiofilm activity and in vivo efficacy are delineated to elucidate the real potential of these antimicrobial polymers as possible therapeutics. Antimicrobial hydrogels, prepared from either inherently antimicrobial polymers or biocide-loaded into polymer-derived hydrogel matrix, are elaborated followed by various strategies to engineer polymer-coated antimicrobial surfaces. In the end, the current challenges are accentuated along with future directions for further expansion of the field toward tackling infections and antimicrobial resistance.
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Affiliation(s)
- Mohini Mohan Konai
- Antimicrobial Research Laboratory, New Chemistry Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bengaluru 560064 , Karnataka , India
| | - Brinta Bhattacharjee
- Antimicrobial Research Laboratory, New Chemistry Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bengaluru 560064 , Karnataka , India
| | - Sreyan Ghosh
- Antimicrobial Research Laboratory, New Chemistry Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bengaluru 560064 , Karnataka , India
| | - Jayanta Haldar
- Antimicrobial Research Laboratory, New Chemistry Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bengaluru 560064 , Karnataka , India
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283
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Megahed A, Aldridge B, Lowe J. The microbial killing capacity of aqueous and gaseous ozone on different surfaces contaminated with dairy cattle manure. PLoS One 2018; 13:e0196555. [PMID: 29758045 PMCID: PMC5951574 DOI: 10.1371/journal.pone.0196555] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 04/16/2018] [Indexed: 11/19/2022] Open
Abstract
A high reactivity and leaving no harmful residues make ozone an effective disinfectant for farm hygiene and biosecurity. Our objectives were therefore to (1) characterize the killing capacity of aqueous and gaseous ozone at different operational conditions on dairy cattle manure-based pathogens (MBP) contaminated different surfaces (plastic, metal, nylon, rubber, and wood); (2) determine the effect of microbial load on the killing capacity of aqueous ozone. In a crossover design, 14 strips of each material were randomly assigned into 3 groups, treatment (n = 6), positive-control (n = 6), and negative-control (n = 2). The strips were soaked in dairy cattle manure with an inoculum level of 107–108 for 60 minutes. The treatment strips were exposed to aqueous ozone of 2, 4, and 9 ppm and gaseous ozone of 1and 9 ppm for 2, 4, and 8 minutes exposure. 3M™ Petrifilm™ rapid aerobic count plate and plate reader were used for bacterial culture. On smooth surfaces, plastic and metal, aqueous ozone at 4 ppm reduced MBP to a safe level (≥5-log10) within 2 minutes (6.1 and 5.1-log10, respectively). However, gaseous ozone at 9 ppm for 4 minutes inactivated 3.3-log10 of MBP. Aqueous ozone of 9 ppm is sufficient to reduce MBP to a safe level, 6.0 and 5.4- log10, on nylon and rubber surfaces within 2 and 8 minutes, respectively. On complex surfaces, wood, both aqueous and gaseous ozone at up to 9 ppm were unable to reduce MBP to a safe level (3.6 and 0.8-log10, respectively). The bacterial load was a strong predictor for reduction in MBP (P<0.0001, R2 = 0.72). We conclude that aqueous ozone of 4 and 9 ppm for 2 minutes may provide an efficient method to reduce MBP to a safe level on smooth and moderately rough surfaces, respectively. However, ozone alone may not an adequate means of controlling MBP on complex surfaces.
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Affiliation(s)
- Ameer Megahed
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Department of Animal Medicine, Internal Medicine, Faculty of Veterinary Medicine, Benha University, Moshtohor-Toukh, Kalyobiya, Egypt
| | - Brian Aldridge
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - James Lowe
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- * E-mail:
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284
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Farokhi M, Mottaghitalab F, Fatahi Y, Khademhosseini A, Kaplan DL. Overview of Silk Fibroin Use in Wound Dressings. Trends Biotechnol 2018; 36:907-922. [PMID: 29764691 DOI: 10.1016/j.tibtech.2018.04.004] [Citation(s) in RCA: 233] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/11/2018] [Accepted: 04/10/2018] [Indexed: 01/01/2023]
Abstract
Recently, biomimetic wound dressings were introduced as potential replacements for treating skin injuries. Although there are some clinically available skin replacements, the range of wound types and locations necessitates a broader range of options for the clinic. Natural polymeric-based dressings are of central interest in this area due to their outstanding biocompatibility, biodegradability, low toxicity, and non-allergenic nature. Among them, silk fibroin (SF) has exceptional characteristics as a wound dressing. SF-based dressings can also be used as carriers for delivering drugs, growth factors, and bioactive agents to the wound area, while providing appropriate support for complete healing. In this review, we describe recent advances in the development of SF-based wound dressings for skin regeneration.
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Affiliation(s)
- Mehdi Farokhi
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran.
| | - Fatemeh Mottaghitalab
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Yousef Fatahi
- Department of pharmaceutical nanotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Khademhosseini
- Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Department of Radiology, California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
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285
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Galié S, García-Gutiérrez C, Miguélez EM, Villar CJ, Lombó F. Biofilms in the Food Industry: Health Aspects and Control Methods. Front Microbiol 2018; 9:898. [PMID: 29867809 PMCID: PMC5949339 DOI: 10.3389/fmicb.2018.00898] [Citation(s) in RCA: 411] [Impact Index Per Article: 68.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 04/18/2018] [Indexed: 12/18/2022] Open
Abstract
Diverse microorganisms are able to grow on food matrixes and along food industry infrastructures. This growth may give rise to biofilms. This review summarizes, on the one hand, the current knowledge regarding the main bacterial species responsible for initial colonization, maturation and dispersal of food industry biofilms, as well as their associated health issues in dairy products, ready-to-eat foods and other food matrixes. These human pathogens include Bacillus cereus (which secretes toxins that can cause diarrhea and vomiting symptoms), Escherichia coli (which may include enterotoxigenic and even enterohemorrhagic strains), Listeria monocytogenes (a ubiquitous species in soil and water that can lead to abortion in pregnant women and other serious complications in children and the elderly), Salmonella enterica (which, when contaminating a food pipeline biofilm, may induce massive outbreaks and even death in children and elderly), and Staphylococcus aureus (known for its numerous enteric toxins). On the other hand, this review describes the currently available biofilm prevention and disruption methods in food factories, including steel surface modifications (such as nanoparticles with different metal oxides, nanocomposites, antimicrobial polymers, hydrogels or liposomes), cell-signaling inhibition strategies (such as lactic and citric acids), chemical treatments (such as ozone, quaternary ammonium compounds, NaOCl and other sanitizers), enzymatic disruption strategies (such as cellulases, proteases, glycosidases and DNAses), non-thermal plasma treatments, the use of bacteriophages (such as P100), bacteriocins (such us nisin), biosurfactants (such as lichenysin or surfactin) and plant essential oils (such as citral- or carvacrol-containing oils).
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Affiliation(s)
- Serena Galié
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Coral García-Gutiérrez
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Elisa M. Miguélez
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Claudio J. Villar
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Felipe Lombó
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
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286
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Fatty acid conjugated pyridinium cationic amphiphiles as antibacterial agents and self-assembling nano carriers. Chem Phys Lipids 2018; 214:1-10. [PMID: 29730266 DOI: 10.1016/j.chemphyslip.2018.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 12/20/2022]
Abstract
Most of the bacteria are on the verge of becoming resistant to available potential antibiotics. Novel approaches to combat these drug resistant bacteria are turning out to be crucial. This study aimed to synthesize novel fatty acid based cationic amphiphiles (FCA) that would serve as nano-drug carrier having intrinsic antibacterial activity. Three fatty acids oleic acid, linoleic acid and linolenic acid based cationic amphiphiles were synthesized and evaluated for antibacterial activity and cytotoxicity. The application in the delivery of vancomycin (VCM) was demonstrated using oleic based cationic amphiphilic (OCA). OCA was self-assembled in aqueous media to prepare VCM loaded OCA vesicles. The particle size, polydispersity index, zeta potential and entrapment efficiency were found to be 132.9 ± 2.5 nm, 0.167 ± 0.02, 18.9 ± 1.2 mV and 61.24 ± 1.8% respectively. The images from transmission electron microscopy (TEM) revealed that the vesicles were spherical and bilayered. The release of VCM from OCA vesicles was sustained throughout the studied period of 72 h. From in vitro studies, a significant antibacterial activity was observed for all three FCAs and it was found that, VCM loaded OCA vesicles displayed indifference and synergism against Gram positive methicillin susceptible and resistant staphylococcus aureus respectively (MRSA). In contrast to minimum inhibitory concentration (MIC) of VCM against Gram negative Escherichia coli (E. coli) and Pseudomonas aeruginosa (P. aeruginosa), the synthesized FCAs were more potent against both the strains, further there was no synergism observed against either of the strains when VCM was encapsulated in OCA vesicles. The synergism against MRSA was further confirmed in in vivo studies using mouse infection model. These findings therefore suggest that, FCAs can make promising nano-carrier systems for the delivery of antibiotics to treat infections caused by multi drug resistant bacteria.
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287
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Makvandi P, Jamaledin R, Jabbari M, Nikfarjam N, Borzacchiello A. Antibacterial quaternary ammonium compounds in dental materials: A systematic review. Dent Mater 2018; 34:851-867. [PMID: 29678327 DOI: 10.1016/j.dental.2018.03.014] [Citation(s) in RCA: 178] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 03/20/2018] [Accepted: 03/23/2018] [Indexed: 01/12/2023]
Abstract
OBJECTIVE Quaternary ammonium compounds (QACs) represent one of the most effective classes of disinfectant agents in dental materials and resin nanocomposites. This reviews aims to give a wide overview on the research in the field of antibacterial QACs in dental materials and nanocomposites. METHOD An introduction to dental materials components as well as the microorganisms and methods of evaluation for the antimicrobial assays are presented. Then, the properties and synthesis route of QACs, as monomer and filler, are shown. Finally, antimicrobial monomers and fillers, specifically those contain quaternary ammonium salts (QASs), in dental materials are reviewed. RESULTS QACs have been used as monomer and micro/nanofiller in restorative dentistry. They possess one or more methacrylate functional groups to participate in polymerization reactions. QACs with multiple methacrylate groups can also be used as crosslinking agents. Furthermore, QACs with chain length from ∼12 to 16 have higher antimicrobial activity in cured dental resins. In general, increasing the chain length leads to a threshold value (critical point) and then it causes decrease in the antimicrobial activity. SIGNIFICANCE The current state of the art of dental materials and resin nanocomposites includes a wide variety of antimicrobial materials. Among them, QACs presents low cytotoxicity and excellent long-term antimicrobial activity without leaching out over time.
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Affiliation(s)
- Pooyan Makvandi
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (CNR), Naples, Italy; Institute for Advanced Studies in Basic Sciences, Zanjan, Iran.
| | - Rezvan Jamaledin
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), Napels, Italy
| | - Mostafa Jabbari
- Swedish Centre for Resource Recovery, University of Borås, Borås SE-50190, Sweden
| | | | - Assunta Borzacchiello
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (CNR), Naples, Italy.
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288
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Wang S, Wang H, Ren B, Li X, Wang L, Zhou H, Weir MD, Zhou X, Masri RM, Oates TW, Cheng L, Xu HHK. Drug resistance of oral bacteria to new antibacterial dental monomer dimethylaminohexadecyl methacrylate. Sci Rep 2018; 8:5509. [PMID: 29615732 PMCID: PMC5882658 DOI: 10.1038/s41598-018-23831-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/21/2018] [Indexed: 02/05/2023] Open
Abstract
Only two reports exist on drug-resistance of quaternary ammonium monomers against oral bacteria; both studies tested planktonic bacteria for 10 passages, and neither study tested biofilms or resins. The objectives of this study were to investigate the drug-resistance of Streptococcus mutans, Streptococcus sanguinis and Streptococcus gordonii against dimethylaminohexadecyl methacrylate (DMAHDM), and to evaluate biofilms on resins with repeated exposures for 20 passages for the first time. DMAHDM, dimethylaminododecyl methacrylate (DMADDM) and chlorhexidine (CHX) were tested with planktonic bacteria. Biofilms were grown on a resin containing 3% DMAHDM. Minimum-inhibitory concentrations were measured. To detect drug-resistance, the survived bacteria from the previous passage were used as inoculum for the next passage for repeated exposures. S. gordonii developed drug-resistance against DMADDM and CHX, but not against DMAHDM. Biofilm colony-forming units (CFU) on DMAHDM-resin was reduced by 3–4 log; there was no difference from passages 1 to 20 (p > 0.1). No drug-resistance to DMAHDM was detected for all three bacterial species. In conclusion, this study showed that DMAHDM induced no drug-resistance, and DMAHDM-resin reduced biofilm CFU by 3–4 log, with no significant change from 1 to 20 passages. DMAHDM with potent antibacterial activities and no drug-resistance is promising for dental applications.
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Affiliation(s)
- Suping Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Deptartment of Cariology and Endodonics West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.,Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA
| | - Haohao Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Deptartment of Cariology and Endodonics West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.,Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA
| | - Biao Ren
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Deptartment of Cariology and Endodonics West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiaodong Li
- Department of Oral Medicine, School of Stomatology, Zhejiang University, Hangzhou, Zhejiang, China
| | - Lin Wang
- VIP Integrated Department, Stomatological Hospital of Jilin University, Changchun, China
| | - Han Zhou
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA.,Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, 19140, USA
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Deptartment of Cariology and Endodonics West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Radi M Masri
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA
| | - Thomas W Oates
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA
| | - Lei Cheng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Deptartment of Cariology and Endodonics West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China. .,Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD, 21201, USA. .,Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA. .,Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore County, MD, 21250, USA. .,Member, Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
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289
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Efficiency of cationic surfactant as microbial corrosion inhibitor for carbon steel in oilfield saline water. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.02.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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290
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Gao T, Zeng H, Xu H, Gao F, Li W, Zhang S, Liu Y, Luo G, Li M, Jiang D, Chen Z, Wu Y, Wang W, Zeng W. Novel Self-assembled Organic Nanoprobe for Molecular Imaging and Treatment of Gram-positive Bacterial Infection. Am J Cancer Res 2018; 8:1911-1922. [PMID: 29556364 PMCID: PMC5858508 DOI: 10.7150/thno.22534] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 12/27/2017] [Indexed: 12/18/2022] Open
Abstract
Background: Increasing bacterial infections as well as a rise in bacterial resistance call for the development of novel and safe antimicrobial agents without inducing bacterial resistance. Nanoparticles (NPs) present some advantages in treating bacterial infections and provide an alternative strategy to discover new antibiotics. Here, we report the development of novel self-assembled fluorescent organic nanoparticles (FONs) with excellent antibacterial efficacy and good biocompatibility. Methods: Self-assembly of 1-(12-(pyridin-1-ium-1-yl)dodecyl)-4-(1,4,5-triphenyl-1H-imidazol-2-yl)pyridin-1-ium (TPIP) in aqueous solution was investigated using dynamic light scattering (DLS) and transmission electron microscopy (TEM). The bacteria were imaged under a laser scanning confocal microscope. We evaluated the antibacterial efficacy of TPIP-FONsin vitro using sugar plate test. The antimicrobial mechanism was explored by SEM. The biocompatibility of the nanoparticles was examined using cytotoxicity test, hemolysis assay, and histological staining. We further tested the antibacterial efficacy of TPIP-FONsin vivo using the S. aureus-infected rats. Results: In aqueous solution, TPIP could self-assemble into nanoparticles (TPIP-FONs) with characteristic aggregation-induced emission (AIE). TPIP-FONs could simultaneously image gram-positive bacteria without the washing process. In vitro antimicrobial activity suggested that TPIP-FONs had excellent antibacterial activity against S. aureus (MIC = 2.0 µg mL-1). Furthermore, TPIP-FONs exhibited intrinsic biocompatibility with mammalian cells, in particular, red blood cells. In vivo studies further demonstrated that TPIP-FONs had excellent antibacterial efficacy and significantly reduced bacterial load in the infectious sites. Conclusion: The integrated design of bacterial imaging and antibacterial functions in the self-assembled small molecules provides a promising strategy for the development of novel antimicrobial nanomaterials.
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291
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Synthesis, Characterization, and Computational Modeling of N-(1-Ethoxyvinyl)pyridinium Triflates, an Unusual Class of Pyridinium Salts. Molecules 2018; 23:molecules23020413. [PMID: 29443883 PMCID: PMC6017145 DOI: 10.3390/molecules23020413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/09/2018] [Accepted: 02/11/2018] [Indexed: 11/20/2022] Open
Abstract
N-Substituted pyridinium salts constitute one of the most valuable reagent classes in organic synthesis, due to their versatility and ease of use. Herein we report a preliminary synthesis and detailed structural analysis of several N-(1-ethoxyvinyl)pyridinium triflates, an unusual class of pyridinium salts with potentially broad use as a reagent in organic synthesis. Treatment of pyridines with trifluoromethane sulfonic acid and ethoxyacetylene generates stable, isolable adducts which have been extensively characterized, due to their novelty. Three-dimensional structural stability is perpetuated by an array of C–H•••O hydrogen bonds involving oxygen atoms from the –SO3 groups of the triflate anion, and hydrogen atoms from the aromatic ring and vinyl group of the pyridinium cation. Predictions from density functional theory calculations of the energy landscape for rotation about the exocyclic C–N bond of 2-chloro-1-(1-ethoxyvinyl)pyridine-1-ium trifluoromethanesulfonate (7) and 1-(1-ethoxyvinyl)pyridine-1-ium trifluoromethanesulfonate (16) are also reported. Notably, the predicted global energy minimum of 7 was nearly identical to that found within the crystal structure.
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292
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Łudzik K, Kustrzepa K, Kowalewicz-Kulbat M, Kontek R, Kontek B, Wróblewska A, Jóźwiak M, Lulo D. Antimicrobial and Cytotoxic Properties of Bisquaternary Ammonium Bromides of Different Spacer Length. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Katarzyna Łudzik
- Frank Laboratory of Neutron Physics; Joint Institute for Nuclear Research, Joliot-Curie 6, (Moscow Region); 141980 Dubna Russia
- Department of Physical Chemistry; University of Lodz, Faculty of Chemistry, Pomorska 165; Lodz 90-236 Poland
| | - Kinga Kustrzepa
- Department of Physical Chemistry; University of Lodz, Faculty of Chemistry, Pomorska 165; Lodz 90-236 Poland
| | - Magdalena Kowalewicz-Kulbat
- Faculty of Biology and Environmental Protection, Department of Immunology and Infectious Biology; University of Lodz, Banacha 12/16; 90-237 Lodz Poland
| | - Renata Kontek
- Faculty of Biology and Environmental Protection, Department of General Genetics, Molecular Biology and Biotechnology; University of Lodz, Banacha 12/16; 90-237 Lodz Poland
| | - Bogdan Kontek
- Department of General Biochemistry; University of Lodz, Faculty of Biology and Environmental Protection, Pomorska 141/143; 90-236 Lodz Poland
| | - Aneta Wróblewska
- Polish Academy of Sciences; Center of Molecular and Macromolecular Studies, Sienkiewicza 112; 90-236 Lodz Poland
| | - Małgorzata Jóźwiak
- Department of Physical Chemistry; University of Lodz, Faculty of Chemistry, Pomorska 165; Lodz 90-236 Poland
| | - Daria Lulo
- Department of Physical Chemistry; University of Lodz, Faculty of Chemistry, Pomorska 165; Lodz 90-236 Poland
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293
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Craft KM, Townsend SD. The Human Milk Glycome as a Defense Against Infectious Diseases: Rationale, Challenges, and Opportunities. ACS Infect Dis 2018; 4:77-83. [PMID: 29140081 DOI: 10.1021/acsinfecdis.7b00209] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Each year over 3 million people die from infectious diseases with most of these deaths being poor and young children who live in low- and middle-income countries. Infectious diseases emerge for a multitude of reasons. On the social front, reasons include a breakdown of public health standards, international travel, and immigration (for financial, civil, and social reasons). At the molecular level, the modern rise of infectious diseases is tied to the juxtaposition of drug-resistant pathogens and a lack of new antimicrobials. The consequence is the possibility that humankind will return to the preantibiotic era wherein millions of people will perish from what should be trivial illnesses. Given the stakes, it is imperative that the chemistry community take leadership in delivering new antibiotic leads for clinical development. We believe this can happen through innovation in two areas. First is the development of novel chemical scaffolds to treat infections caused by multidrug-resistant pathogens. The second area, which is not exclusive to the first, is the generation of antibiotics that do not cause collateral damage to the host or the host's microbiome. Both can be enabled through advances in chemical synthesis. It is with this general philosophy in mind that we hypothesized human milk oligosaccharides (HMOs) could serve as novel chemical scaffolds for antibacterial development. We provide herein a personal account of our laboratory's progress toward the goal of using HMOs as a defense against infectious diseases.
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Affiliation(s)
- Kelly M. Craft
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Steven D. Townsend
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, Tennessee 37235, United States
- Institute of Chemical Biology, Vanderbilt University, 896 Preston Research Building, Nashville, Tennessee 37232, United States
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294
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Hossain S, De Silva BCJ, Wimalasena SHMP, Pathirana HNKS, Dahanayake PS, Heo GJ. Distribution of Antimicrobial Resistance Genes and Class 1 Integron Gene Cassette Arrays in Motile Aeromonas spp. Isolated from Goldfish (Carassius auratus). Microb Drug Resist 2018; 24:1217-1225. [PMID: 29420133 DOI: 10.1089/mdr.2017.0388] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Aeromonas spp. are opportunistic pathogens related to multiple infectious diseases in ornamental fishes. In the present study, the antimicrobial susceptibility, resistance genes, and integrons of 65 goldfish-borne Aeromonas spp. were evaluated. The isolates were identified as A. hydrophila (n = 30), A. veronii (n = 32), and A. punctata (n = 3) by gyrB sequencing. The antimicrobial susceptibility testing of the isolates designated that most of the isolates were resistant to amoxicillin (100.00%), nalidixic acid (100.00%), ampicillin (98.46%), tetracycline (92.31%), rifampicin (86.15%), and cephalothin (61.54%) and each of the isolates showed multiple antimicrobial resistance phenotype (resistant to ≥3 classes of antimicrobials). PCR amplification of antimicrobial resistance genes revealed that the plasmid-mediated quinolone resistance gene, qnrS, was the most prevalent (73.85%) among the isolates. The other antimicrobial resistance genes were detected in the following proportions: qnrB (26.15%), aac(6')-Ib-cr (4.60%), tetA (16.92%), tetE (21.54%), aac(6')-Ib (29.23%), and aphAI-IAB (7.69%). The IntI gene was found in 64.62% isolates, and four class 1 integron gene cassette profiles (incomplete dfrA1, catB3-aadA1, dfrA1-orfC, and qacE2-orfD) were identified. These data suggest that goldfish-borne Aeromonas spp. serve as a reservoir of antimicrobial resistance genes and class 1 integrons.
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Affiliation(s)
- Sabrina Hossain
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University , Cheongju, Korea
| | | | | | | | - Pasan Sepala Dahanayake
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University , Cheongju, Korea
| | - Gang-Joon Heo
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University , Cheongju, Korea
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295
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Marquardt F, Stöcker C, Gartzen R, Heine E, Keul H, Möller M. Novel Antibacterial Polyglycidols: Relationship between Structure and Properties. Polymers (Basel) 2018; 10:E96. [PMID: 30966132 PMCID: PMC6414948 DOI: 10.3390/polym10010096] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/17/2018] [Accepted: 01/18/2018] [Indexed: 11/16/2022] Open
Abstract
Antimicrobial polymers are an attractive alternative to low molecular weight biocides, because they are non-volatile, chemically stable, and can be used as non-releasing additives. Polymers with pendant quaternary ammonium groups and hydrophobic chains exhibit antimicrobial properties due to the electrostatic interaction between polymer and cell wall, and the membrane disruptive capabilities of the hydrophobic moiety. Herein, the synthesis of cationic⁻hydrophobic polyglycidols with varying structures by post-polymerization modification is presented. The antimicrobial properties of the prepared polyglycidols against E. coli and S. aureus are examined. Polyglycidol with statistically distributed cationic and hydrophobic groups (cationic⁻hydrophobic balance of 1:1) is compared to (i) polyglycidol with a hydrophilic modification at the cationic functionality; (ii) polyglycidol with both-cationic and hydrophobic groups-at every repeating unit; and (iii) polyglycidol with a cationic⁻hydrophobic balance of 1:2. A relationship between structure and properties is presented.
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Affiliation(s)
- Fabian Marquardt
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University and DWI Leibniz-Institute for Interactive Materials, Forckenbeckstr. 50, D-52056 Aachen, Germany.
| | - Cornelia Stöcker
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University and DWI Leibniz-Institute for Interactive Materials, Forckenbeckstr. 50, D-52056 Aachen, Germany.
| | - Rita Gartzen
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University and DWI Leibniz-Institute for Interactive Materials, Forckenbeckstr. 50, D-52056 Aachen, Germany.
| | - Elisabeth Heine
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University and DWI Leibniz-Institute for Interactive Materials, Forckenbeckstr. 50, D-52056 Aachen, Germany.
| | - Helmut Keul
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University and DWI Leibniz-Institute for Interactive Materials, Forckenbeckstr. 50, D-52056 Aachen, Germany.
| | - Martin Möller
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University and DWI Leibniz-Institute for Interactive Materials, Forckenbeckstr. 50, D-52056 Aachen, Germany.
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296
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Chen S, Li Q, Wang X, Yang YW, Gao H. Multifunctional bacterial imaging and therapy systems. J Mater Chem B 2018; 6:5198-5214. [DOI: 10.1039/c8tb01519h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Advanced antibacterial materials are classified and introduced, and their applications in multimodal imaging and therapy are reviewed.
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Affiliation(s)
- Shuai Chen
- School of Chemistry and Chemical Engineering
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Qiaoying Li
- School of Chemistry and Chemical Engineering
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Xin Wang
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Ying-Wei Yang
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Hui Gao
- School of Chemistry and Chemical Engineering
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- Tianjin University of Technology
- Tianjin 300384
- P. R. China
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297
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Konai MM, Samaddar S, Bocchinfuso G, Santucci V, Stella L, Haldar J. Selectively targeting bacteria by tuning the molecular design of membrane-active peptidomimetic amphiphiles. Chem Commun (Camb) 2018; 54:4943-4946. [DOI: 10.1039/c8cc01926f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here we report the design of membrane-active peptidomimetic molecules with a tunable arrangement of hydrophobic and polar groups.
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Affiliation(s)
- Mohini M. Konai
- Antimicrobial Research Laboratory
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bengaluru 560064
- India
| | - Sandip Samaddar
- Antimicrobial Research Laboratory
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bengaluru 560064
- India
| | | | - Valerio Santucci
- Department of Chemical Science and Technologies
- University of Rome Tor Vergata
- Rome
- Italy
| | - Lorenzo Stella
- Department of Chemical Science and Technologies
- University of Rome Tor Vergata
- Rome
- Italy
| | - Jayanta Haldar
- Antimicrobial Research Laboratory
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bengaluru 560064
- India
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298
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Moretti G, Matteucci F, Saraullo M, Vegliò F, Del Gallo M. Selection of a Very Active Microbial Community for the Coupled Treatment of Tetramethylammonium Hydroxide and Photoresist in Aqueous Solutions. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 15:ijerph15010041. [PMID: 29280962 PMCID: PMC5800140 DOI: 10.3390/ijerph15010041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/20/2017] [Accepted: 12/21/2017] [Indexed: 12/04/2022]
Abstract
Aerobic treatment of wastewater containing Tetramethylammonium hydroxide (TMAH) and photoresist was investigated using a lab scale reactor inoculated with activated sludge coming from urban wastewater treatment that never received TMAH before. The consumption of TMAH was monitored by liquid ion chromatography. Biodiversity indices were calculated from Denaturing Gradient Gel Electrophoresis (DGGE) bands distribution and used to estimate changes in community composition related to adaptation to the new feeding compound. The first week of adaptation was crucial, and it was analyzed in detail: many organisms died, and the microbial community suffered a great shock. TMAH levels remained constant through the first four days, and then suddenly dropped to undetectable, and at the same time NH4+ increased. When the community showed complete adaptation, predominant groups of bacteria were obtained by the Illumina sequencing of 16s rDNA amplicons, to provide insights on ecology of the adapted community, focusing on the main actors of TMAH abatement. Richness of species (Rr) peaks suggest that the development of TMAH-consuming bacteria leads to persistent consortia that maintain toxicity resistance over time. This showed adaptation and changes of the population to the different feeding conditions, and it opens new perspectives in the in situ treatment of these important residues of industrial processes without relying on external processing plants.
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Affiliation(s)
- Giulio Moretti
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Federica Matteucci
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Matteo Saraullo
- Department of Industrial and Information Engineering and Economics, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Francesco Vegliò
- Department of Industrial and Information Engineering and Economics, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Maddalena Del Gallo
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
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299
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In vivo studies of the effectiveness of novel N-halomethylated and non-halomethylated quaternary ammonium salts in the topical treatment of cutaneous leishmaniasis. Parasitol Res 2017; 117:273-286. [PMID: 29230580 DOI: 10.1007/s00436-017-5702-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 11/27/2017] [Indexed: 10/18/2022]
Abstract
The physicochemical properties of four N-halomethylated and one non-halomethylated ammonium salts, with proven in vitro antileishmanial activity, were determined according to pharmaceutical standard procedures. The effectiveness and toxicity of these compounds were assessed in hamsters infected with Leishmania (Viannia) braziliensis and compared to that showed by meglumine antimoniate. Animals were followed during 90 days after the completion of treatment. Therapeutic response was determined according to the reduction of size of skin lesions. Toxicity was determined by the effect of compounds on body weight changes and serum levels of renal and hepatic metabolites. The effectiveness of compound 4 was similar to that showed by intralesional administration of meglumine antimoniate and better than that of the other ammonium salts. Levels of creatinine, alanine amino transferase, and blood urea nitrogen in serum were not significantly different between treatment groups, including healthy or untreated hamsters. Results imply that compound 4 has potential as a pharmaceutical active ingredient in the development of new and better formulations for the treatment of cutaneous leishmaniasis.
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300
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Chauhan S, Kaur M, Singh K, Chauhan M, Kohli P. Micellar and antimicrobial activities of ionic surfactants in aqueous solutions of synthesized tetraalkylammonium based ionic liquids. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.09.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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