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Smoleński M, Muschert S, Haznar-Garbacz D, Małolepsza-Jarmołowska K. Nanoemulsion Loaded with Clotrimazole Based on Rapeseed Oil for Potential Vaginal Application-Development, Initial Assessment, and Pilot Release Studies. Pharmaceutics 2023; 15:pharmaceutics15051437. [PMID: 37242679 DOI: 10.3390/pharmaceutics15051437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/03/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Vaginal candidiasis (VC) is an emerging global hardly treated health issue affecting millions of women worldwide. In this study, the nanoemulsion consisting of clotrimazole (CLT), rapeseed oil, Pluronic F-68, Span 80, PEG 200, and lactic acid was prepared using high-speed and high-pressure homogenization. Yielded formulations were characterized by an average droplet size of 52-56 nm, homogenous size distribution by volume, and a polydispersity index (PDI) < 0.2. The osmolality of nanoemulsions (NEs) fulfilled the recommendations of the WHO advisory note. NEs were stable throughout 28 weeks of storage. The stationary and dynamic (USP apparatus IV) pilot study of the changes of free CLT over time for NEs, as well as market cream and CLT suspension as references, were conducted. Test results of the changes in the amount of free CLT released from the encapsulated form were not coherent; in the stationary method, NEs yielded up to 27% of the released CLT dose within 5 h, while in the USP apparatus IV method, NEs released up to 10% of the CLT dose. NEs are promising carriers for vaginal drug delivery in the treatment of VC; however, further development of the final dosage form and harmonized release or dissolution testing protocols are needed.
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Affiliation(s)
- Michał Smoleński
- Department of Drug Form Technology, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
| | | | - Dorota Haznar-Garbacz
- Department of Drug Form Technology, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
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2
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Meena P, Kishore N. Potential of tetradecyltrimethylammonium bromide in preventing fibrillation/aggregation of lysozyme: biophysical studies. J Biomol Struct Dyn 2022; 40:13378-13391. [PMID: 34662249 DOI: 10.1080/07391102.2021.1987989] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A key step in the prevention of neurodegenerative disorders is to inhibit protein aggregation or fibrillation process. Functionality recognition is an essential strategy in developing effective therapeutics in addressing the treatment of amyloidosis. Here, we have focused on an approach based on structure-property energetics correlation associated with tetradecyltrimethylammonium bromide (TTAB), a cationic surfactant that acts as an inhibitor targeting different stages of hen egg-white lysozyme fibrillation. Characterization of amyloid fibrils and the inhibitory capability of 16 mM TTAB surfactant on fibrillation were investigated with the calorimetric, spectroscopic and microscopic techniques. ThT binding fluorescence studies inferred that micellar TTAB exerts its maximum inhibitory effect against amyloid fibrillation than monomer TTAB. The TEM measurements also confirmed complete absence of amyloid fibrils at micellar TTAB. At the same time, the transformation of β-sheet to α-helix under the action of TTAB was confirmed by the Far-UV CD spectroscopy. Although there have been some reports suggesting that cationic surfactants can induce aggregation in proteins, this work suggests that polar interactions between head groups of TTAB and amyloid fibrils are the predominant factors that cause retardation in fibrillation by interrupting/disturbing the intermolecular hydrogen bond of β-sheets. The present finding has explored the knowledge-based details in developing efficient potent inhibitors and provides a platform to treat diseases associated with protein misfolding.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Pooja Meena
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Nand Kishore
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
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Filipe HAL, Fiuza SM, Henriques CA, Antunes FE. Antiviral and antibacterial activity of hand sanitizer and surface disinfectant formulations. Int J Pharm 2021; 609:121139. [PMID: 34592397 DOI: 10.1016/j.ijpharm.2021.121139] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/13/2021] [Accepted: 09/24/2021] [Indexed: 01/04/2023]
Abstract
Emergent diseases caused by viral and bacterial infections have proven to be a current and future challenge. The occurrence of these diseases is usually accompanied by the lack of vaccines and dedicated therapies leaving prevention as the best strategy to adopt. In that context, and apart from confinement and physical distancing measures, an increase in hygiene actions, namely hand and surface cleaning and disinfection can reduce the infection spread originated from our day-to-day routines. However, during crisis situations the high disinfectants demand can very likely lead to having them running out of stock. This impels many individuals and companies to produce their own disinfectants. Here, we explore the main components of a disinfection formulation, both for hand-rub and surface cleaning. Alcohol and non-alcohol based formulations are described, including the possibility to fine tune the properties of the final product in order to increase public acceptance while maintaining product efficacy. The action mechanisms of the main active principles are also described conjugating information from experimental and theoretical data. Overall, the main aspects to develop a disinfectant formulation are addressed, as well as their function, helping formulation developers to better understand the impact of their choices.
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Affiliation(s)
- Hugo A L Filipe
- Coimbra Chemistry Centre, Dept. of Chemistry, University of Coimbra, Rua Larga, 3004-535, Coimbra, Portugal; CPIRN-IPG-Center of Potential and Innovation of Natural Resources, Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal.
| | - Sónia M Fiuza
- Science351, IPN (Edifício C) Rua Pedro Nunes, 3030-199 Coimbra, Portugal
| | - César A Henriques
- EcoXperience, HIESE, Quinta Vale do Espinhal, 3230-343 Penela, Portugal
| | - Filipe E Antunes
- Coimbra Chemistry Centre, Dept. of Chemistry, University of Coimbra, Rua Larga, 3004-535, Coimbra, Portugal
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4
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Biomaterials for human space exploration: A review of their untapped potential. Acta Biomater 2021; 128:77-99. [PMID: 33962071 DOI: 10.1016/j.actbio.2021.04.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 04/01/2021] [Accepted: 04/15/2021] [Indexed: 02/08/2023]
Abstract
As biomaterial advances make headway into lightweight radiation protection, wound healing dressings, and microbe resistant surfaces, a relevance to human space exploration manifests itself. To address the needs of the human in space, a knowledge of the space environment becomes necessary. Both an understanding of the environment itself and an understanding of the physiological adaptations to that environment must inform design parameters. The space environment permits the fabrication of novel biomaterials that cannot be produced on Earth, but benefit Earth. Similarly, designing a biomaterial to address a space-based challenge may lead to novel biomaterials that will ultimately benefit Earth. This review describes several persistent challenges to human space exploration, a variety of biomaterials that might mitigate those challenges, and considers a special category of space biomaterial. STATEMENT OF SIGNIFICANCE: This work is a review of the major human and environmental challenges facing human spaceflight, and where biomaterials may mitigate some of those challenges. The work is significant because a broad range of biomaterials are applicable to the human space program, but the overlap is not widely known amongst biomaterials researchers who are unfamiliar with the challenges to human spaceflight. Additionaly, there are adaptations to microgravity that mimic the pathology of certain disease states ("terrestrial analogs") where treatments that help the overwhelmingly healthy astronauts can be applied to help those with the desease. Advances in space technology have furthered the technology in that field on Earth. By outlining ways that biomaterials can promote human space exploration, space-driven advances in biomaterials will further biomaterials technology.
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Emulsion-Based Multicompartment Vaginal Drug Carriers: From Nanoemulsions to Nanoemulgels. Int J Mol Sci 2021; 22:ijms22126455. [PMID: 34208652 PMCID: PMC8233730 DOI: 10.3390/ijms22126455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/10/2021] [Accepted: 06/11/2021] [Indexed: 01/05/2023] Open
Abstract
In order to overcome the limitations associated with vaginal administration of drugs, e.g., the short contact time of the drug form with the mucosa or continuous carrier wash-out, the development of new carriers for gynecological use is necessary. Furthermore, high individual anatomical and physiological variability resulting in unsatisfactory therapeutic efficacy of lipophilic active substances requires application of multicompartment drug delivery systems. This manuscript provides an up-to-date comprehensive review of the literature on emulsion-based vaginal dosage forms (EVDF) including macroemulsions, microemulsions, nanoemulsions, multiple emulsions and self-emulsifying drug delivery systems. The first part of the paper discusses (i) the influence of anatomical-physiological conditions on therapeutic efficacy of drug forms after local and systemic administration, (ii) characterization of EVDF components and the manufacturing techniques of these dosage forms and (iii) methods used to evaluate the physicochemical and pharmaceutical properties of emulsion-based vaginal dosage forms. The second part of the paper presents (iv) the results of biological and in vivo studies as well as (v) clinical evaluation of EVDF safety and therapeutic efficacy across different indications.
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Alfaiate MI, António Santos R, Silva AF, Sousa AP, Almeida-Santos T, Gendron C, Jabbour V, Mas Y, Verriere F, Ramalho-Santos J, Tavares RS. Comparative in vitro study on the local tolerance and efficacy of benzalkonium chloride, myristalkonium chloride and nonoxynol-9 as active principles in vaginal contraceptives. EUR J CONTRACEP REPR 2021; 26:334-342. [PMID: 33821738 DOI: 10.1080/13625187.2021.1900563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Spermicides have been identified as a potentially attractive alternative to hormonal contraceptives and/or intrauterine devices. Thus, this study aimed evaluating the efficacy and local tolerance of benzalkonium chloride (BKC) and myristalkonium chloride (MKC) contained in Pharmatex® vaginal formulations and compare them with nonoxynol-9 (N-9), the most common active ingredient in topical vaginal contraceptives. METHODS Human normozoospermic samples were assessed for motility, viability, acrosome status and penetration ability after exposure to control, N-9 or different BKC and MKC doses for 0 and 10 minutes. Local tolerance on HeLa cells was evaluated by the Trypan-blue and MTT assays. RESULTS Exposure to BKC and MKC reduced acrosome integrity while promoting total immobilisation and complete loss of sperm viability (p < .001, n = 15). Both compounds also compromised sperm penetration ability upon exposure (p < .001, n = 15). N-9 induced the same outcomes (p < .001, n = 15); nevertheless, it was more toxic to HeLa cells than BKC and MKC (p < .05, n = 14). CONCLUSIONS BKC and MKC present strong in vitro spermicidal activity at lower doses than N-9 and were better tolerated after immediate exposure than N-9. Available Pharmatex® galenic formulations were as effective as products based on N-9.
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Affiliation(s)
- Maria Inês Alfaiate
- Biology of Reproduction and Stem Cells Group, CNC- Center for Neuroscience and Cell Biology, CIBB, Polo III, Azinhaga Santa Comba, University of Coimbra, Coimbra, Portugal
| | - Rita António Santos
- Biology of Reproduction and Stem Cells Group, CNC- Center for Neuroscience and Cell Biology, CIBB, Polo III, Azinhaga Santa Comba, University of Coimbra, Coimbra, Portugal
| | - Andreia Filipa Silva
- Biology of Reproduction and Stem Cells Group, CNC- Center for Neuroscience and Cell Biology, CIBB, Polo III, Azinhaga Santa Comba, University of Coimbra, Coimbra, Portugal.,University of Coimbra, IIIUC, Casa Costa Alemão, Coimbra, Portugal
| | - Ana Paula Sousa
- Biology of Reproduction and Stem Cells Group, CNC- Center for Neuroscience and Cell Biology, CIBB, Polo III, Azinhaga Santa Comba, University of Coimbra, Coimbra, Portugal.,Reproductive Medicine Unit, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Teresa Almeida-Santos
- Reproductive Medicine Unit, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | | | | | - Yana Mas
- Laboratoire Innotech International, Arcueil, France
| | | | - João Ramalho-Santos
- Biology of Reproduction and Stem Cells Group, CNC- Center for Neuroscience and Cell Biology, CIBB, Polo III, Azinhaga Santa Comba, University of Coimbra, Coimbra, Portugal.,Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, Coimbra, Portugal
| | - Renata Santos Tavares
- Biology of Reproduction and Stem Cells Group, CNC- Center for Neuroscience and Cell Biology, CIBB, Polo III, Azinhaga Santa Comba, University of Coimbra, Coimbra, Portugal.,University of Coimbra, IIIUC, Casa Costa Alemão, Coimbra, Portugal
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Removal of sodium dodecyl sulphate from wastewater and its effect on anodic biofilm and performance of microbial fuel cell. INTERNATIONAL BIODETERIORATION & BIODEGRADATION 2021. [DOI: 10.1016/j.ibiod.2020.105108] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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de Lima CO, de Oliveira ALM, Chantelle L, Silva Filho EC, Jaber M, Fonseca MG. Zn-doped mesoporous hydroxyapatites and their antimicrobial properties. Colloids Surf B Biointerfaces 2020; 198:111471. [PMID: 33257159 DOI: 10.1016/j.colsurfb.2020.111471] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/04/2020] [Accepted: 11/11/2020] [Indexed: 02/07/2023]
Abstract
Recently, zinc-based materials have gained immense attention as antimicrobial agents. In this study, zinc-doped mesoporous hydroxyapatites (HAps) with various Zn contents were prepared by co-precipitation using a phosphoprotein as the porous template. The use of the phosphoprotein as the porous template resulted in the formation of zinc-doped mesoporous HAps (mHAps) with large pores and specific surface area (182 m2 g-1), as indicated by the nitrogen adsorption/desorption measurements. The formation of the zinc-doped HAps was confirmed by various analytical techniques such as X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The biomaterials prepared in this study were used as antimicrobial agents against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. The Zn2%-mHAp sample showed the maximum bacterial inhibitory concentrations of 50 ± 5% and 77 ± 5% for the Gram-positive and Gram-negative bacteria, respectively. The antibacterial activity of the mHAp samples depended strongly on their Zn2+ content. Thus, the use of a biotemplate and Zn2+ ions is an efficient approach for the formation of novel HAp-based biomaterials with promising antibacterial properties. This synthesis approach will pave a new pathway for the functionalization of other materials for different biomedical applications.
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Affiliation(s)
- Cleibson Oliveira de Lima
- Universidade Federal da Paraíba, Núcleo de Pesquisa e Extensão LACOM, 58051-085, João Pessoa, Paraíba, Brazil
| | - André L Menezes de Oliveira
- Universidade Federal da Paraíba, Núcleo de Pesquisa e Extensão LACOM, 58051-085, João Pessoa, Paraíba, Brazil
| | - Laís Chantelle
- Universidade Federal da Paraíba, Núcleo de Pesquisa e Extensão LACOM, 58051-085, João Pessoa, Paraíba, Brazil
| | - Edson C Silva Filho
- Interdisciplinary Laboratory for Advanced Materials-LIMAV, Universidade Federal do Piauí, Teresina, 64049- 11 550, Piauí, Brazil
| | - Maguy Jaber
- Sorbonne Université, Laboratoire d'Archéologie Moléculaire et Structurale, Institut Universitaire de France (IUF), CNRS UMR 8220, UPMC - Tour 23, 3ème étage, couloir 23-33, BP 225, 4 place Jussieu, 75005, Paris, France
| | - Maria Gardênia Fonseca
- Universidade Federal da Paraíba, Núcleo de Pesquisa e Extensão LACOM, 58051-085, João Pessoa, Paraíba, Brazil.
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Foligno S, Loi B, Pezza L, Piastra M, Autilio C, De Luca D. Extrapulmonary Surfactant Therapy: Review of Available Data and Research/Development Issues. J Clin Pharmacol 2020; 60:1561-1572. [PMID: 32578234 DOI: 10.1002/jcph.1675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/21/2020] [Indexed: 11/07/2022]
Abstract
Since the discovery of surfactant, a large amount of knowledge has been accumulated about its biology and pharmacology. Surfactant is the cornerstone of neonatal respiratory critical care, but its proteins and phospholipids are produced in various tissues and organs, with possible roles only partially similar to that played in the alveoli. As surfactant research is focused mainly on its respiratory applications, knowledge about the possible role of surfactant in extrapulmonary disorders has never been summarized. Here we aim to comprehensively review the data about surfactant biology and pharmacology in organs other than the lung, especially focusing in the more promising surfactant extrapulmonary roles. We also review any preclinical or clinical data available about the therapeutic use of surfactant in these contexts. We offer a summary of knowledge and research/development milestones, as possible useful guidance for researchers of multidisciplinary background.
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Affiliation(s)
- Silvia Foligno
- Division of Pediatrics and Neonatal Critical Care, Medical Center, "A. Béclère," South Paris University Hospitals, Assistance Publique-Hopitaux de Paris (APHP), Paris, France
| | - Barbara Loi
- Division of Pediatrics and Neonatal Critical Care, Medical Center, "A. Béclère," South Paris University Hospitals, Assistance Publique-Hopitaux de Paris (APHP), Paris, France
| | - Lucilla Pezza
- Pediatric Intensive Care Unit, Department of Anesthesia and Critical Care, University Hospital "A.Gemelli"-IRCCS, Catholic University of the Sacred Heart, Rome, Italy
| | - Marco Piastra
- Pediatric Intensive Care Unit, Department of Anesthesia and Critical Care, University Hospital "A.Gemelli"-IRCCS, Catholic University of the Sacred Heart, Rome, Italy
| | - Chiara Autilio
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institut-Hospital "12 de Octubre,", Complutense University, Madrid, Spain
| | - Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, Medical Center, "A. Béclère," South Paris University Hospitals, Assistance Publique-Hopitaux de Paris (APHP), Paris, France.,Physiopathology and Therapeutic Innovation Unit-INSERM U999, South Paris/Saclay University, Paris, France
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Abstract
Human skin is a complex ecosystem and is host to a large number of microorganisms. When the bacterial ecosystem is balanced and differentiated, skin remains healthy. However, the use of cosmetics can change this balance and promote the appearance of skin diseases. The skin’s microorganisms can utilize some cosmetic components, which either promote their growth, or produce metabolites that influence the skin environment. In this study, we tested the ability of the Malassezia species and some bacterial strains to assimilate substances frequently used in dermal formulations. The growth capability of microorganisms was determined and their lipase activity was analyzed. The growth of all Malassezia spp. in the presence of free acids, free acid esters, and fatty alcohols with a fatty chain length above 12 carbon atoms was observed. No growth was observed in the presence of fatty alcohol ethers, secondary fatty alcohols, paraffin- and silicon-based substances, polymers, polyethylene glycols, quaternary ammonium salts, hydroxy fatty acid esters, or fatty acids and fatty acid esters with a fatty chain length shorter than 12 carbon atoms. The hydrolysis of esters by Malassezia lipases was detected using High Performance Thin Layer Chromatography (HPTLC). The production of free fatty acids as well as fatty alcohols was observed. The growth promotion or inhibition of bacterial strains was only found in the presence of a few ingredients. Based on these results, formulations containing microbiome inert ingredients were developed.
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Biswas B, Warr LN, Hilder EF, Goswami N, Rahman MM, Churchman JG, Vasilev K, Pan G, Naidu R. Biocompatible functionalisation of nanoclays for improved environmental remediation. Chem Soc Rev 2019; 48:3740-3770. [PMID: 31206104 DOI: 10.1039/c8cs01019f] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Among the wide range of materials used for remediating environmental contaminants, modified and functionalised nanoclays show particular promise as advanced sorbents, improved dispersants, or biodegradation enhancers. However, many chemically modified nanoclay materials are incompatible with living organisms when they are used in natural systems with detrimental implications for ecosystem recovery. Here we critically review the pros and cons of functionalised nanoclays and provide new perspectives on the synthesis of environmentally friendly varieties. Particular focus is given to finding alternatives to conventional surfactants used in modified nanoclay products, and to exploring strategies in synthesising nanoclay-supported metal and metal oxide nanoparticles. A large number of promising nanoclay-based sorbents are yet to satisfy environmental biocompatibility in situ but opportunities are there to tailor them to produce "biocompatible" or regenerative/reusable materials.
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Affiliation(s)
- Bhabananda Biswas
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia. and Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ACT building, The University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Laurence N Warr
- Institute for Geography and Geology, University of Greifswald, D-17487 Greifswald, Germany
| | - Emily F Hilder
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia.
| | - Nirmal Goswami
- School of Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Mohammad M Rahman
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ACT building, The University of Newcastle, Callaghan, NSW 2308, Australia. and Global Centre for Environmental Remediation, the University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Jock G Churchman
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Urrbrae, SA 5064, Australia
| | - Krasimir Vasilev
- School of Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Gang Pan
- Centre of Integrated Water-Energy-Food Studies, School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Southwell, NG25 0QF, UK
| | - Ravi Naidu
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ACT building, The University of Newcastle, Callaghan, NSW 2308, Australia. and Global Centre for Environmental Remediation, the University of Newcastle, Callaghan, NSW 2308, Australia.
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Fait ME, da Costa HPS, Freitas CDT, Bakás L, Morcelle SR. Antifungal Activity of Arginine-Based Surfactants. ACTA ACUST UNITED AC 2019. [DOI: 10.2174/1573407214666180131161302] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Background:Amino acid based surfactants constitute an important class of surface active biomolecules showing remarkable biocompatible properties. Antimicrobial activity is one of the most remarkable biological properties of this kind of surfactants, which have been widely studied against a broad spectrum of microorganisms. However, the antifungal activity of this kind of compound has been less well investigated. The aim of this work is the study of the antifungal activity of two novel argininebased surfactants (Nα-benzoyl-arginine decylamide, Bz-Arg-NHC10 and Nα-benzoyl-arginine dodecylamide, Bz-Arg-NHC12), obtained by an enzymatic strategy, against phytopathogenic filamentous fungi and dermatophyte strains.Methods:Four phytopathogenic fungi (Fusarium oxysporum, Fusarium solani, Colletotrichum gloeosporioides and Colletotrichum lindemuthianum) and two human pathogenic fungi (dermatophytes Trichophyton rubrum and Trichophyton mentagrophytes) were tested. Inhibition of vegetative growth and conidia germination was investigated for the phytopathogenic fungi. In order to elucidate the possible mechanism of biocide action, membrane integrity, as well as the production of reactive oxygen species (ROS) were evaluated. Additionally, the inhibition of germination of dermatophyte microconidia due to both arginine-based surfactants was studied. Minimum inhibitory concentration, as well as the concentration that inhibits 50% of germination were determined for both compounds and both fungal strains.Results:For the vegetative growth of phytopathogenic fungi, the most potent arginine-based compound was Bz-Arg-NHC10. All the tested compounds interfered with the conidia development of the studied species. Investigation of the possible mechanism of toxicity towards phytopathogenic fungi indicated direct damage of the plasma membrane and production of ROS. For the two strains of dermatophyte fungi tested, all the proved compounds showed similar fungistatic efficacy.Conclusion:: Bz-Arg-NHC10 and Bz-Arg-NHC12 were demonstrated to have broad biocidal ability against the proliferative vegetative form and the asexual reproductive conidia. Results suggest that both membrane permeabilization and induction of oxidative stress are part of the antifungal mechanisms involved in the interruption of normal conidia development by Bz-Arg-NHCn, leading to cell death.
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Affiliation(s)
- Maria E. Fait
- Centro de Investigacion de Proteinas Vegetales (CIPROVE-Centro Asociado CICPBA), Depto. de Cs. Biologicas, Facultad de Cs. Exactas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina
| | - Helen P. S. da Costa
- Laboratorio de Toxinas Vegetais, Depto. de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Ceara, Brazil
| | - Cleverson D. T. Freitas
- Laboratorio de Biotecnologia de Proteases Vegetais, Depto. de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Ceara, Brazil
| | - Laura Bakás
- Centro de Investigacion de Proteinas Vegetales (CIPROVE-Centro Asociado CICPBA), Depto. de Cs. Biologicas, Facultad de Cs. Exactas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina
| | - Susana R. Morcelle
- Centro de Investigacion de Proteinas Vegetales (CIPROVE-Centro Asociado CICPBA), Depto. de Cs. Biologicas, Facultad de Cs. Exactas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina
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13
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Hwang JH, Kim KY, Resurreccion EP, Lee WH. Surfactant addition to enhance bioavailability of bilge water in single chamber microbial fuel cells (MFCs). JOURNAL OF HAZARDOUS MATERIALS 2019; 368:732-738. [PMID: 30739026 DOI: 10.1016/j.jhazmat.2019.02.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 02/01/2019] [Accepted: 02/03/2019] [Indexed: 05/07/2023]
Abstract
Effective remediation of bilge water, a shipboard oily liquid waste, is important for both commercial and military vessels due to the domestic and international regulations. In this study, bilge water was used as a substrate for exoelectrogenic bacteria and biodegradation of bilge water and concurrent electricity generation were investigated using Pseudomonas putida ATCC 49128 in single chamber microbial fuel cells (MFCs). To enhance bioavailability of the bilge water, two types of surfactants were added (100 ppm) into the oily wastewater containing 0.1% standard bilge mix (SBM) and their impacts on electricity production were evaluated under various conditions. Anionic surfactant (sodium dodecyl sulfate, SDS) addition increased soluble chemical oxygen demand (SCOD) by forming micelle, producing maximum power density of 225.3 ± 3.2 mW m-2. However, the MFC with nonionic surfactant (Triton X-100) produced only 2.3 ± 0.1 mW m-2 due to no enhancement on biodegradable SCOD. A high NaCl concentration (100-500 mM) adversely affected power production due to decrease in available SCOD caused by emulsion coalescence. This is a first study to use surfactants to enhance bioavailability of non-biodegradable oily wastewater in a single chamber MFC.
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Affiliation(s)
- Jae-Hoon Hwang
- Department of Civil, Environmental and Construction Engineering, University of Central Florida, Orlando, Florida, 32816, United States
| | - Kyoung-Yeol Kim
- Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, 1400 Washington Avenue, Albany, New York 12222, United States
| | - Eleazer P Resurreccion
- Department of Civil Engineering Technology, Montana State University Northern, Havre, Montana, 59501, United States
| | - Woo Hyoung Lee
- Department of Civil, Environmental and Construction Engineering, University of Central Florida, Orlando, Florida, 32816, United States.
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Mukhija A, Kishore N. Prevention and Disintegration of Human Serum Albumin Fibrils under Physiological Conditions: Biophysical Aspects. J Phys Chem B 2018; 122:9896-9906. [DOI: 10.1021/acs.jpcb.8b07140] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Achal Mukhija
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Nand Kishore
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
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Reeve PJ, Fallowfield HJ. Natural and surfactant modified zeolites: A review of their applications for water remediation with a focus on surfactant desorption and toxicity towards microorganisms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 205:253-261. [PMID: 28992557 DOI: 10.1016/j.jenvman.2017.09.077] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/26/2017] [Accepted: 09/27/2017] [Indexed: 06/07/2023]
Abstract
The objective of this review is to highlight the need for further investigation of microbial toxicity caused by desorption of surfactant from Surfactant Modified Zeolite (SMZ). SMZ is a low cost, versatile permeable reactive media which has the potential to treat multiple classes of contaminants. With this combination of characteristics, SMZ has significant potential to enhance water and wastewater treatment processes. Surfactant desorption has been identified as a potential issue for the ongoing usability of SMZ. Few studies have investigated the toxicity of surfactants used in zeolite modification towards microorganisms and fewer have drawn linkages between surfactant desorption and surfactant toxicity. This review provides an overview of natural zeolite chemistry, characteristics and practical applications. The chemistry of commonly used surfactants is outlined, along with the kinetics that drive their adsorption to the zeolite surface. Methodologies to characterise this surfactant loading are also described. Applications of SMZ in water remediation are highlighted, giving focus to applications which deal with biological pollutants and where microorganisms play a role in the remediation process. Studies that have identified surfactant desorption from SMZ are outlined. Finally, the toxicity of a commonly used cationic surfactant towards microorganisms is discussed. This review highlights the potential for surfactant to desorb from the zeolite surface and the need for further research into the toxicity of this desorbed surfactant towards microorganisms, including pathogens and environmental microbes.
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Affiliation(s)
- Peter J Reeve
- Health and Environment Group, College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia.
| | - Howard J Fallowfield
- Health and Environment Group, College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
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16
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Khan MV, Zaman M, Chandel TI, Siddiqui MK, Ajmal MR, Abdelhameed AS, Khan RH. Cationic surfactant mediated fibrillogenesis in bovine liver catalase: a biophysical approach. J Biomol Struct Dyn 2017; 36:2543-2557. [DOI: 10.1080/07391102.2017.1363085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Mohsin Vahid Khan
- Molecular Biophysics and Biophysical Chemistry Group, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Masihuz Zaman
- Molecular Biophysics and Biophysical Chemistry Group, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Tajalli Ilm Chandel
- Molecular Biophysics and Biophysical Chemistry Group, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Khursheed Siddiqui
- Molecular Biophysics and Biophysical Chemistry Group, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Mohd. Rehan Ajmal
- Molecular Biophysics and Biophysical Chemistry Group, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Ali Saber Abdelhameed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Rizwan Hasan Khan
- Molecular Biophysics and Biophysical Chemistry Group, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
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Yang A, Tang WS, Si T, Tang JX. Influence of Physical Effects on the Swarming Motility of Pseudomonas aeruginosa. Biophys J 2017; 112:1462-1471. [PMID: 28402888 DOI: 10.1016/j.bpj.2017.02.019] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 02/08/2017] [Accepted: 02/16/2017] [Indexed: 12/31/2022] Open
Abstract
Many species of bacteria can spread over a moist surface via a particular form of collective motion known as "surface swarming". This form of motility is typically studied by inoculating bacteria on a gel formed by 0.4-1.5% agar, which contains essential nutrients for their growth and proliferation. Using Pseudomonas aeruginosa and its pili-less mutant, ΔPilA, we investigate physical factors that either facilitate or restrict the swarming motility, measured by the rate of increase in area covered by a spreading bacterial colony, i.e., a swarm. The wild-type colony spreads over the agar surface in highly branched structures. The pili-less mutant fills up the area more fully as it spreads, but it also produces numerous and fragmented branches, or tendrils, at the swarm front. Whereas additional surfactants enhance swarming, increasing the agar percentage, adding extra salt or sugar or incorporating viscous agents in the agar matrix all decrease swarming, supporting the conclusion that swarming motility is restricted by the surface tension at the swarm front and swarm growth is limited by the rate of water supply from within the agar gel. The physical basis elaborated through this study provides a useful framework for understanding the swarming behavior of numerous species of bacteria.
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Affiliation(s)
- Alexander Yang
- Physics Department, Brown University, Providence, Rhode Island
| | - Wai Shing Tang
- Department of Physics, The Chinese University of Hong Kong, Hong Kong, P. R. China
| | - Tieyan Si
- Harbin Institute of Technology, Harbin, P. R. China
| | - Jay X Tang
- Physics Department, Brown University, Providence, Rhode Island.
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Jiao Y, Niu LN, Ma S, Li J, Tay FR, Chen JH. Quaternary ammonium-based biomedical materials: State-of-the-art, toxicological aspects and antimicrobial resistance. Prog Polym Sci 2017; 71:53-90. [PMID: 32287485 PMCID: PMC7111226 DOI: 10.1016/j.progpolymsci.2017.03.001] [Citation(s) in RCA: 306] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 03/07/2017] [Accepted: 03/07/2017] [Indexed: 12/20/2022]
Abstract
Microbial infections affect humans worldwide. Many quaternary ammonium compounds have been synthesized that are not only antibacterial, but also possess antifungal, antiviral and anti-matrix metalloproteinase capabilities. Incorporation of quaternary ammonium moieties into polymers represents one of the most promising strategies for preparation of antimicrobial biomaterials. Various polymerization techniques have been employed to prepare antimicrobial surfaces with quaternary ammonium functionalities; in particular, syntheses involving controlled radical polymerization techniques enable precise control over macromolecular structure, order and functionality. Although recent publications report exciting advances in the biomedical field, some of these technological developments have also been accompanied by potential toxicological and antimicrobial resistance challenges. Recent evidenced-based data on the biomedical applications of antimicrobial quaternary ammonium-containing biomaterials that are based on randomized human clinical trials, the golden standard in contemporary medicinal science, are included in the present review. This should help increase visibility, stimulate debates and spur conversations within a wider scientific community on the implications and plausibility for future developments of quaternary ammonium-based antimicrobial biomaterials.
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Affiliation(s)
- Yang Jiao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, 710032, Xi’an, Shaanxi, China
- Department of Stomatology, PLA Army General Hospital, 100700, Beijing, China
| | - Li-na Niu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, 710032, Xi’an, Shaanxi, China
| | - Sai Ma
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, 710032, Xi’an, Shaanxi, China
| | - Jing Li
- Department of Orthopaedic Oncology, Xijing Hospital Affiliated to the Fourth Military Medical University, 710032, Xi’an, Shaanxi, China
| | - Franklin R. Tay
- Department of Endodontics, The Dental College of Georgia, Augusta University, Augusta, GA, 30912, USA
- Corresponding authors.
| | - Ji-hua Chen
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, 710032, Xi’an, Shaanxi, China
- Corresponding authors.
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19
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Which structural features stand behind micelization of ionic liquids? Quantitative Structure-Property Relationship studies. J Colloid Interface Sci 2017; 487:475-483. [DOI: 10.1016/j.jcis.2016.10.066] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/20/2016] [Accepted: 10/24/2016] [Indexed: 12/15/2022]
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20
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In vitro disintegration of goat brain cystatin fibrils using conventional and gemini surfactants: Putative therapeutic intervention in amyloidoses. Int J Biol Macromol 2016; 93:493-500. [DOI: 10.1016/j.ijbiomac.2016.08.082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 08/26/2016] [Accepted: 08/29/2016] [Indexed: 01/01/2023]
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Zhang Y, Li X, Yu H. Toxicity of nanoparticle surface coating agents: Structure-cytotoxicity relationship. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2016; 34:204-215. [PMID: 27323213 DOI: 10.1080/10590501.2016.1202762] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Surface coating agents for metal nanoparticles, cationic alkyl ammonium bromides, and anionic alkyl sulfates were tested against human skin keratinocytes (HaCaT) and blood T lymphocytes (TIB-152). The surfactants of short chain (C8) are not cytotoxic, but as chain length increases, their cytotoxicity increases and levels off at C12 for cationic surfactants against both cell lines and for anionic surfactants against the TIB-152, but C14 for anionic surfactants against HaCaT. The cationic surfactants are more toxic than the anionic surfactants for HaCaT; while with similar cytotoxicity for TIB-152 cells. di- and tetra-Alkyl ammonium salts are more cytotoxic than the mono-substituted.
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Affiliation(s)
- Ying Zhang
- a Department of Chemistry and Biochemistry , Jackson State University , Jackson , Mississippi , USA
| | - Xiaoping Li
- b Center for Nano-Environmental Science and Health, Shaanxi Normal University , Xi'an , China
| | - Hongtao Yu
- a Department of Chemistry and Biochemistry , Jackson State University , Jackson , Mississippi , USA
- b Center for Nano-Environmental Science and Health, Shaanxi Normal University , Xi'an , China
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In Vitro Activity of Quaternary Ammonium Surfactants against Streptococcal, Chlamydial, and Gonococcal Infective Agents. Antimicrob Agents Chemother 2016; 60:3323-32. [PMID: 26976875 DOI: 10.1128/aac.00166-16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 03/09/2016] [Indexed: 11/20/2022] Open
Abstract
Quaternary ammonium compounds (QAC) are widely used, cheap, and chemically stable disinfectants and topical antiseptics with wide-spectrum antimicrobial activities. Within this group of compounds, we recently showed that there are significant differences between the pharmacodynamics of n-alkyl quaternary ammonium surfactants (QAS) with a short (C12) alkyl chain when in vitro toxicities toward bacterial and mammalian epithelial cells are compared. These differences result in an attractive therapeutic window that justifies studying short-chain QAS as prophylactics for sexually transmitted infections (STI) and perinatal vertically transmitted urogenital infections (UGI). We have evaluated the antimicrobial activities of short-chain (C12) n-alkyl QAS against several STI and UGI pathogens as well as against commensal Lactobacillus species. Inhibition of infection of HeLa cells by Neisseria gonorrhoeae and Chlamydia trachomatis was studied at concentrations that were not toxic to the HeLa cells. We show that the pathogenic bacteria are much more susceptible to QAS toxic effects than the commensal vaginal flora and that QAS significantly attenuate the infectivity of N. gonorrhoeae and C. trachomatis without affecting the viability of epithelial cells of the vaginal mucosa. N-Dodecylpyridinium bromide (C12PB) was found to be the most effective QAS. Our results strongly suggest that short-chain (C12) n-alkyl pyridinium bromides and structurally similar compounds are promising microbicide candidates for topical application in the prophylaxis of STI and perinatal vertical transmission of UGI.
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Inácio ÂS, Domingues NS, Nunes A, Martins PT, Moreno MJ, Estronca LM, Fernandes R, Moreno AJM, Borrego MJ, Gomes JP, Vaz WLC, Vieira OV. Quaternary ammonium surfactant structure determines selective toxicity towards bacteria: mechanisms of action and clinical implications in antibacterial prophylaxis. J Antimicrob Chemother 2015; 71:641-54. [PMID: 26679255 DOI: 10.1093/jac/dkv405] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 11/02/2015] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Broad-spectrum antimicrobial activity of quaternary ammonium surfactants (QAS) makes them attractive and cheap topical prophylactic options for sexually transmitted infections and perinatal vertically transmitted urogenital infections. Although attributed to their high affinity for biological membranes, the mechanisms behind QAS microbicidal activity are not fully understood. We evaluated how QAS structure affects antimicrobial activity and whether this can be exploited for use in prophylaxis of bacterial infections. METHODS Acute toxicity of QAS to in vitro models of human epithelial cells and bacteria were compared to identify selective and potent bactericidal agents. Bacterial cell viability, membrane integrity, cell cycle and metabolism were evaluated to establish the mechanisms involved in selective toxicity of QAS. RESULTS QAS toxicity normalized relative to surfactant critical micelle concentration showed n-dodecylpyridinium bromide (C12PB) to be the most effective, with a therapeutic index of ∼10 for an MDR strain of Escherichia coli and >20 for Neisseria gonorrhoeae after 1 h of exposure. Three modes of QAS antibacterial action were identified: impairment of bacterial energetics and cell division at low concentrations; membrane permeabilization and electron transport inhibition at intermediate doses; and disruption of bacterial membranes and cell lysis at concentrations close to the critical micelle concentration. In contrast, toxicity to mammalian cells occurs at higher concentrations and, as we previously reported, results primarily from mitochondrial dysfunction and apoptotic cell death. CONCLUSIONS Our data show that short chain (C12) n-alkyl pyridinium bromides have a sufficiently large therapeutic window to be good microbicide candidates.
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Affiliation(s)
- Ângela S Inácio
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Neuza S Domingues
- CEDOC, NOVA Medical School
- Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal
| | - Alexandra Nunes
- Department of Infectious Diseases, National Institute of Health, Lisbon, Portugal
| | - Patrícia T Martins
- Centro de Química de Coimbra and Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal
| | - Maria J Moreno
- Centro de Química de Coimbra and Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal
| | - Luís M Estronca
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Rui Fernandes
- IBMC/HEMS - Instituto de Biologia Molecular e Celular/Histology and Electron Microscopy Service, Universidade do Porto, Porto, Portugal
| | | | - Maria J Borrego
- Department of Infectious Diseases, National Institute of Health, Lisbon, Portugal
| | - João P Gomes
- Department of Infectious Diseases, National Institute of Health, Lisbon, Portugal
| | - Winchil L C Vaz
- CEDOC, NOVA Medical School
- Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal
| | - Otília V Vieira
- CEDOC, NOVA Medical School
- Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal
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A study of the surface charging properties of a standard strain of Escherichia coli (ATCC 11775) in aqueous solutions. Colloids Surf B Biointerfaces 2015; 135:811-816. [DOI: 10.1016/j.colsurfb.2015.08.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/31/2015] [Accepted: 08/25/2015] [Indexed: 11/21/2022]
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25
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Sauerová P, Verdánová M, Mravec F, Pilgrová T, Venerová T, Hubálek Kalbáčová M, Pekař M. Hyaluronic acid as a modulator of the cytotoxic effects of cationic surfactants. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.06.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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26
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Optimization of curcumin loaded vaginal in-situ hydrogel by box-behnken statistical design for contraception. J Drug Deliv Sci Technol 2015. [DOI: 10.1016/j.jddst.2015.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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The antimicrobial potential of ionic liquids: A source of chemical diversity for infection and biofilm control. Int J Antimicrob Agents 2015; 46:131-9. [DOI: 10.1016/j.ijantimicag.2015.02.016] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 02/12/2015] [Accepted: 02/13/2015] [Indexed: 01/09/2023]
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Biocatalytic synthesis, antimicrobial properties and toxicity studies of arginine derivative surfactants. Amino Acids 2015; 47:1465-77. [PMID: 25894891 DOI: 10.1007/s00726-015-1979-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 03/30/2015] [Indexed: 10/23/2022]
Abstract
Two novel arginine-based cationic surfactants were synthesized using as biocatalyst papain, an endopeptidase from Carica papaya latex, adsorbed onto polyamide. The classical substrate N (α)-benzoyl-arginine ethyl ester hydrochloride for the determination of cysteine and serine proteases activity was used as the arginine donor, whereas decyl- and dodecylamine were used as nucleophiles for the condensation reaction. Yields higher than 90 and 80 % were achieved for the synthesis of N (α)-benzoyl-arginine decyl amide (Bz-Arg-NHC10) and N (α)-benzoyl-arginine dodecyl amide (Bz-Arg-NHC12), respectively. The purification process was developed in order to make it more sustainable, by using water and ethanol as the main separation solvents in a single cationic exchange chromatographic separation step. Bz-Arg-NHC10 and Bz-Arg-NHC12 proved antimicrobial activity against both Gram-positive and Gram-negative bacteria, revealing their potential use as effective disinfectants as they reduced 99 % the initial bacterial population after only 1 h of contact. The cytotoxic effect towards different cell types of both arginine derivatives was also measured. Bz-Arg-NHCn demonstrated lower haemolytic activity and were less eye-irritating than the commercial cationic surfactant cetrimide. A similar trend could also be observed when cytotoxicity was tested on hepatocytes and fibroblast cell lines: both arginine derivatives were less toxic than cetrimide. All these properties would make the two novel arginine compounds a promising alternative to commercial cationic surfactants, especially for their use as additives in topical formulations.
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Interfacial and Solution Behavior of Amphiphilic Drug and Counterion-Coupled Gemini (COCOGEM) Surfactants. J SURFACTANTS DETERG 2014. [DOI: 10.1007/s11743-014-1643-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Pandey NK, Ghosh S, Dasgupta S. Effect of surfactants on preformed fibrils of human serum albumin. Int J Biol Macromol 2013; 59:39-45. [DOI: 10.1016/j.ijbiomac.2013.04.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 04/08/2013] [Accepted: 04/08/2013] [Indexed: 11/25/2022]
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Mitochondrial dysfunction is the focus of quaternary ammonium surfactant toxicity to mammalian epithelial cells. Antimicrob Agents Chemother 2013; 57:2631-9. [PMID: 23529737 DOI: 10.1128/aac.02437-12] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Surfactants have long been known to have microbicidal action and have been extensively used as antiseptics and disinfectants for a variety of general hygiene and clinical purposes. Among surfactants, quaternary ammonium compounds (QAC) are known to be the most useful antiseptics and disinfectants. However, our previous toxicological studies showed that QAC are also the most toxic surfactants for mammalian cells. An understanding of the mechanisms that underlie QAC toxicity is a crucial first step in their rational use and in the design and development of more effective and safer molecules. We show that QAC-induced toxicity is mediated primarily through mitochondrial dysfunction in mammalian columnar epithelial cell cultures in vitro. Toxic effects begin at sublethal concentrations and are characterized by mitochondrial fragmentation accompanied by decreased cellular energy charge. At very low concentrations, several QAC act on mitochondrial bioenergetics through a common mechanism of action, primarily by inhibiting mitochondrial respiration initiated at complex I and, to a lesser extent, by slowing down coupled ADP phosphorylation. The result is a reduction of cellular energy charge which, when reduced below 50% of its original value, induces apoptosis. The lethal effects are shown to be primarily a result of this process. At higher doses (closer to the critical micellar concentration), QAC induce the complete breakdown of cellular energy charge and necrotic cell death.
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Baptista M, Publicover SJ, Ramalho-Santos J. In vitro effects of cationic compounds on functional human sperm parameters. Fertil Steril 2013; 99:705-12. [DOI: 10.1016/j.fertnstert.2012.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 10/25/2012] [Accepted: 11/02/2012] [Indexed: 12/09/2022]
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Wang H, Kaur T, Tavakoli N, Joseph J, Wettig S. Transfection and structural properties of phytanyl substituted gemini surfactant-based vectors for gene delivery. Phys Chem Chem Phys 2013; 15:20510-6. [DOI: 10.1039/c3cp52621f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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34
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Hartmann DO, Silva Pereira C. A molecular analysis of the toxicity of alkyltributylphosphonium chlorides in Aspergillus nidulans. NEW J CHEM 2013. [DOI: 10.1039/c3nj00167a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Ballou B, Andreko SK, Osuna-Highley E, McRaven M, Catalone T, Bruchez MP, Hope TJ, Labib ME. Nanoparticle transport from mouse vagina to adjacent lymph nodes. PLoS One 2012; 7:e51995. [PMID: 23284844 PMCID: PMC3528720 DOI: 10.1371/journal.pone.0051995] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 11/12/2012] [Indexed: 01/07/2023] Open
Abstract
To test the feasibility of localized intravaginal therapy directed to neighboring lymph nodes, the transport of quantum dots across the vaginal wall was investigated. Quantum dots instilled into the mouse vagina were transported across the vaginal mucosa into draining lymph nodes, but not into distant nodes. Most of the particles were transported to the lumbar nodes; far fewer were transported to the inguinal nodes. A low level of transport was evident at 4 hr after intravaginal instillation, and transport peaked at about 36 hr after instillation. Transport was greatly enhanced by prior vaginal instillation of Nonoxynol-9. Hundreds of micrograms of nanoparticles/kg tissue (ppb) were found in the lumbar lymph nodes at 36 hr post-instillation. Our results imply that targeted transport of microbicides or immunogens from the vagina to local lymph organs is feasible. They also offer an in vivo model for assessing the toxicity of compounds intended for intravaginal use.
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Affiliation(s)
- Byron Ballou
- Molecular Biosensor and Imaging Center (MBIC), Carnegie Mellon University, Pittsburgh, PA, USA.
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36
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Estronca LMBB, Silva JCP, Sampaio JL, Shevchenko A, Verkade P, Vaz ADN, Vaz WLC, Vieira OV. Molecular etiology of atherogenesis--in vitro induction of lipidosis in macrophages with a new LDL model. PLoS One 2012; 7:e34822. [PMID: 22514671 PMCID: PMC3325953 DOI: 10.1371/journal.pone.0034822] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 03/06/2012] [Indexed: 02/02/2023] Open
Abstract
Background Atherosclerosis starts by lipid accumulation in the arterial intima and progresses into a chronic vascular inflammatory disease. A major atherogenic process is the formation of lipid-loaded macrophages in which a breakdown of the endolysomal pathway results in irreversible accumulation of cargo in the late endocytic compartments with a phenotype similar to several forms of lipidosis. Macrophages exposed to oxidized LDL exihibit this phenomenon in vitro and manifest an impaired degradation of internalized lipids and enhanced inflammatory stimulation. Identification of the specific chemical component(s) causing this phenotype has been elusive because of the chemical complexity of oxidized LDL. Methodology/Principal Findings Lipid “core aldehydes" are formed in oxidized LDL and exist in atherosclerotic plaques. These aldehydes are slowly oxidized in situ and (much faster) by intracellular aldehyde oxidizing systems to cholesteryl hemiesters. We show that a single cholesteryl hemiester incorporated into native, non-oxidized LDL induces a lipidosis phenotype with subsequent cell death in macrophages. Internalization of the cholesteryl hemiester via the native LDL vehicle induced lipid accumulation in a time- and concentration-dependent manner in “frozen" endolysosomes. Quantitative shotgun lipidomics analysis showed that internalized lipid in cholesteryl hemiester-intoxicated cells remained largely unprocessed in those lipid-rich organelles. Conclusions/Significance The principle elucidated with the present cholesteryl hemiester-containing native-LDL model, extended to other molecular components of oxidized LDL, will help in defining the molecular etiology and etiological hierarchy of atherogenic agents.
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Affiliation(s)
- Luis M. B. B. Estronca
- Center for Neuroscience and Cell Biology, University of Coimbra, Largo Marquês de Pombal, Coimbra, Portugal
| | - Joao C. P. Silva
- Center for Neuroscience and Cell Biology, University of Coimbra, Largo Marquês de Pombal, Coimbra, Portugal
| | - Julio L. Sampaio
- Max-Planck Institute for Molecular Cell Biology and Genetics. Pfotenhauerstrasse, Dresden, Germany
| | - Andrej Shevchenko
- Max-Planck Institute for Molecular Cell Biology and Genetics. Pfotenhauerstrasse, Dresden, Germany
| | - Paul Verkade
- Schools of Biochemistry, and Physiology and Pharmacology, Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Alfin D. N. Vaz
- Pharmacokinetics, Dynamics & Metabolism, Pfizer Global Research and Development, Groton, Connecticut, United States of America
| | | | - Otilia V. Vieira
- Center for Neuroscience and Cell Biology, University of Coimbra, Largo Marquês de Pombal, Coimbra, Portugal
- * E-mail:
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Almeida JAS, Faneca H, Carvalho RA, Marques EF, Pais AACC. Dicationic alkylammonium bromide gemini surfactants. Membrane perturbation and skin irritation. PLoS One 2011; 6:e26965. [PMID: 22102870 PMCID: PMC3213113 DOI: 10.1371/journal.pone.0026965] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 10/06/2011] [Indexed: 11/30/2022] Open
Abstract
Dicationic alkylammonium bromide gemini surfactants represent a class of amphiphiles potentially effective as skin permeation enhancers. However, only a limited number of studies has been dedicated to the evaluation of the respective cytotoxicity, and none directed to skin irritation endpoints. Supported on a cell viability study, the cytotoxicity of gemini surfactants of variable tail and spacer length was assessed. For this purpose, keratinocyte cells from human skin (NCTC 2544 cell line), frequently used as a model for skin irritation, were employed. The impact of the different gemini surfactants on the permeability and morphology of model vesicles was additionally investigated by measuring the leakage of calcein fluorescent dye and analyzing the NMR spectra of 31P, respectively. Detail on the interaction of gemini molecules with model membranes was also provided by a systematic differential scanning calorimetry (DSC) and molecular dynamics (MD) simulation. An irreversible impact on the viability of the NCTC 2544 cell line was observed for gemini concentrations higher than 25 mM, while no cytotoxicity was found for any of the surfactants in a concentration range up to 10 mM. A higher cytotoxicity was also found for gemini surfactants presenting longer spacer and shorter tails. The same trend was obtained in the calorimetric and permeability studies, with the gemini of longest spacer promoting the highest degree of membrane destabilization. Additional structural and dynamical characterization of the various systems, obtained by 31P NMR and MD, provide some insight on the relationship between the architecture of gemini surfactants and the respective perturbation mechanism.
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Löwy I. 'Sexual chemistry' before the pill: science, industry and chemical contraceptives, 1920-1960. BRITISH JOURNAL FOR THE HISTORY OF SCIENCE 2011; 44:245-274. [PMID: 21879607 DOI: 10.1017/s0007087410000762] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The history of contraceptives met the history of drugs long before the invention of the contraceptive pill. In the first half of the twentieth century, numerous pharmaceutical laboratories, including major ones, manufactured and marketed chemical contraceptives: jellies, suppositories, creams, powders and foams applied locally to prevent conception. Efforts to put an end to the marginal status of these products and to transform them into 'ethical' drugs played an important role in the development of standardized laboratory tests of efficacy of contraceptive preparations; debates on the validity of such tests; evaluation of the long-term toxicity of chemical compounds; and the rise of collaborations between activists, non-profit organizations and the pharmaceutical industry. Chemical contraceptives were initially associated with quack medicine, shady commercial practices and doubtful morality. Striving to change the status of contraceptives and to promote safe and efficient products that reduced fertility in humans shaped some of the key features of the present-day production and regulation of pharmaceuticals.
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Affiliation(s)
- Ilana Löwy
- CERMES (INSERM, CNRS, EHESS), 7 rue Guy Moquet, 94801 Vuillejuif cedex, France.
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39
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In vitro surfactant structure-toxicity relationships: implications for surfactant use in sexually transmitted infection prophylaxis and contraception. PLoS One 2011; 6:e19850. [PMID: 21603626 PMCID: PMC3095630 DOI: 10.1371/journal.pone.0019850] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Accepted: 04/18/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The need for woman-controlled, cheap, safe, effective, easy-to-use and easy-to-store topical applications for prophylaxis against sexually transmitted infections (STIs) makes surfactant-containing formulations an interesting option that requires a more fundamental knowledge concerning surfactant toxicology and structure-activity relationships. METHODOLOGY/PRINCIPAL FINDINGS We report in vitro effects of surfactant concentration, exposure time and structure on the viability of mammalian cell types typically encountered in the vagina, namely, fully polarized and confluent epithelial cells, confluent but non-polarized epithelial-like cells, dendritic cells, and human sperm. Representatives of the different families of commercially available surfactants--nonionic (Triton X-100 and monolaurin), zwitterionic (DDPS), anionic (SDS), and cationic (C(n)TAB (n = 10 to 16), C(12)PB, and C(12)BZK)--were examined. Triton X-100, monolaurin, DDPS and SDS were toxic to all cell types at concentrations around their critical micelle concentration (CMC) suggesting a non-selective mode of action involving cell membrane destabilization and/or destruction. All cationic surfactants were toxic at concentrations far below their CMC and showed significant differences in their toxicity toward polarized as compared with non-polarized cells. Their toxicity was also dependent on the chemical nature of the polar head group. Our results suggest an intracellular locus of action for cationic surfactants and show that their structure-activity relationships could be profitably exploited for STI prophylaxis in vaginal gel formulations. The therapeutic indices comparing polarized epithelial cell toxicity to sperm toxicity for all surfactants examined, except C(12)PB and C(12)BZK, does not justify their use as contraceptive agents. C(12)PB and C(12)BZK are shown to have a narrow therapeutic index recommending caution in their use in contraceptive formulations. CONCLUSIONS/SIGNIFICANCE Our results contribute to understanding the mechanisms involved in surfactant toxicity, have a predictive value with regard to their safety, and may be used to design more effective and less harmful surfactants for use in topical applications for STI prophylaxis.
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40
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Maisuria BB, Actis ML, Hardrict SN, Falkinham JO, Cole MF, Cihlar RL, Peters SM, Macri RV, Sugandhi EW, Williams AA, Poppe MA, Esker AR, Gandour RD. Comparing micellar, hemolytic, and antibacterial properties of di- and tricarboxyl dendritic amphiphiles. Bioorg Med Chem 2011; 19:2918-26. [DOI: 10.1016/j.bmc.2011.03.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2010] [Revised: 03/10/2011] [Accepted: 03/17/2011] [Indexed: 10/18/2022]
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Mechanism of inactivation of influenza viruses by immobilized hydrophobic polycations. Proc Natl Acad Sci U S A 2010; 108:61-6. [PMID: 21173278 DOI: 10.1073/pnas.1017012108] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
N,N-dodecyl,methyl-polyethylenimine coatings applied to solid surfaces have been shown by us to disinfect aqueous solutions of influenza viruses. Herein we elucidate the mechanism of this phenomenon. Infectivity-, protein-, RNA-, and scanning electron microscopy-based experiments reveal that, upon contact with the hydrophobic polycationic coating, influenza viruses (including pathogenic human and avian, both wild-type and drug-resistant, strains) irreversibly adhere to it, followed by structural damage and inactivation; subsequently, viral RNA is released into solution, while proteins remain adsorbed.
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42
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Almeida JAS, Marques EF, Jurado AS, Pais AACC. The effect of cationic gemini surfactants upon lipid membranes. An experimental and molecular dynamics simulation study. Phys Chem Chem Phys 2010; 12:14462-76. [DOI: 10.1039/c0cp00950d] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Markiewicz M, Jungnickel C, Markowska A, Szczepaniak U, Paszkiewicz M, Hupka J. 1-methyl-3-octylimidazolium chloride--sorption and primary biodegradation analysis in activated sewage sludge. Molecules 2009; 14:4396-405. [PMID: 19924073 PMCID: PMC6254910 DOI: 10.3390/molecules14114396] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2009] [Revised: 10/28/2009] [Accepted: 10/30/2009] [Indexed: 11/20/2022] Open
Abstract
Ionic liquids (ILs) are known to be non-volatile and thus to have low potential for atmospheric contamination or intoxication of humans by inhalation. However ILs have the potential to contaminate soil and water as they might be water soluble and can be sorbed onto solids. The investigation of possible natural ways of reducing the concentration of ILs in the environment is of high importance, especially because the requirement for biodegradable chemicals increases, together with pressure for reduction of incineration and landfill waste. It was found that the upper concentration threshold for primary biodegradation of 1-methyl-3-octylimidazolium chloride is 0.2 mM. At higher concentrations the dehydrogenase activity of the cells dropped markedly, indicating that the IL inhibits cell activity. This concentration is in good agreement with the minimal inhibitory concentration of the same compound found for a series of bacteria and fungi by this research group. The sorption of 1-methyl-3-octylimidazolium chloride was found to be significant, and the sorption coefficient was determined to be 98.2 L kg-1.
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Affiliation(s)
- Marta Markiewicz
- Department of Chemical Technology, Chemical Faculty, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Christian Jungnickel
- Department of Chemical Technology, Chemical Faculty, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +48 58 347 2334; Fax: +48 58 347 2065
| | - Aleksandra Markowska
- Faculty of Chemistry, University of Gdańsk, Sobieskiego 18, PL 80-233 Gdańsk, Poland
| | - Urszula Szczepaniak
- Department of Chemical Technology, Chemical Faculty, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Monika Paszkiewicz
- Faculty of Chemistry, University of Gdańsk, Sobieskiego 18, PL 80-233 Gdańsk, Poland
| | - Jan Hupka
- Department of Chemical Technology, Chemical Faculty, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
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Preiss U, Jungnickel C, Thöming J, Krossing I, Łuczak J, Diedenhofen M, Klamt A. Predicting the Critical Micelle Concentrations of Aqueous Solutions of Ionic Liquids and Other Ionic Surfactants. Chemistry 2009; 15:8880-5. [DOI: 10.1002/chem.200900024] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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45
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Macri RV, Karlovská J, Doncel GF, Du X, Maisuria BB, Williams AA, Sugandhi EW, Falkinham JO, Esker AR, Gandour RD. Comparing anti-HIV, antibacterial, antifungal, micellar, and cytotoxic properties of tricarboxylato dendritic amphiphiles. Bioorg Med Chem 2009; 17:3162-8. [PMID: 19307123 DOI: 10.1016/j.bmc.2009.02.055] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2008] [Revised: 02/24/2009] [Accepted: 02/27/2009] [Indexed: 10/21/2022]
Abstract
Three series of homologous dendritic amphiphiles--RCONHC(CH(2)CH(2)COOH)(3), 1(n); ROCONHC(CH(2)CH(2)COOH)(3), 2(n); RNHCONHC(CH(2)CH(2)COOH)(3), 3(n), where R = n-C(n)H(2n+1) and n = 13-22 carbon atoms--were assayed for their potential to serve as antimicrobial components in a topical vaginal formulation. Comparing epithelial cytotoxicities to the ability of these homologues to inhibit HIV, Neisseria gonorrhoeae, and Candida albicans provided a measure of their prophylactic/therapeutic potential. Measurements of the ability to inhibit Lactobacillus plantarum, a beneficial bacterium in the vagina, and critical micelle concentrations (CMCs), an indicator of the potential detergency of these amphiphiles, provided additional assessments of safety. Several amphiphiles from each homologous series had modest anti-HIV activity (EC(50) = 110-130 microM). Amphiphile 2(18) had the best anti-Neisseria activity (MIC =65 microM), while 1(19) and 1(21) had MICs against C. albicans of 16 and 7.7 microM, respectively. Two measures of safety showed promise as all compounds had relatively low cytotoxic activity (EC(50) = 210-940 microM) against epithelial cells and low activity against L. plantarum, 1(n), 2(n), and 3(n) had MICs490, 1300, and 940 microM, respectively. CMCs measured in aqueous triethanolamine and in aqueous potassium hydroxide showed linear dependences on chain length. As expected, the longest chain in each series had the lowest CMC-in triethanolamine: 1(21), 1500 microM; 2(22), 320 microM; 3(22), 340 microM, and in potassium hydroxide: 1(21), 130 microM; 3(22), 40 microM. The CMC in triethanolamine adjusted to pH 7.4 was 400 microM for 1(21) and 3900 microM for 3(16). The promising antifungal activity, low activity against L. plantarum, relatively high CMCs, and modest epithelial cytotoxicity in addition to their anti-Neisseria properties warrant further design studies with dendritic amphiphiles to improve their safety indices to produce suitable candidates for antimicrobial vaginal products.
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Affiliation(s)
- Richard V Macri
- Department of Chemistry (0212), Virginia Tech, Blacksburg, VA 24061, United States
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