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Hussain B, Simm R, Bueno J, Giannettou S, Naemi AO, Lyngstadaas SP, Haugen HJ. Biofouling on titanium implants: a novel formulation of poloxamer and peroxide for in situ removal of pellicle and multi-species oral biofilm. Regen Biomater 2024; 11:rbae014. [PMID: 38435376 PMCID: PMC10907064 DOI: 10.1093/rb/rbae014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/27/2024] [Accepted: 02/07/2024] [Indexed: 03/05/2024] Open
Abstract
Eradicating biofouling from implant surfaces is essential in treating peri-implant infections, as it directly addresses the microbial source for infection and inflammation around dental implants. This controlled laboratory study examines the effectiveness of the four commercially available debridement solutions '(EDTA (Prefgel®), NaOCl (Perisolv®), H2O2 (Sigma-Aldrich) and Chlorhexidine (GUM® Paroex®))' in removing the acquired pellicle, preventing pellicle re-formation and removing of a multi-species oral biofilm growing on a titanium implant surface, and compare the results with the effect of a novel formulation of a peroxide-activated 'Poloxamer gel (Nubone® Clean)'. Evaluation of pellicle removal and re-formation was conducted using scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy to assess the surface morphology, elemental composition and chemical surface composition. Hydrophilicity was assessed through contact angle measurements. The multi-species biofilm model included Streptococcus oralis, Fusobacterium nucleatum and Aggregatibacter actinomycetemcomitans, reflecting the natural oral microbiome's complexity. Biofilm biomass was quantified using safranin staining, biofilm viability was evaluated using confocal laser scanning microscopy, and SEM was used for morphological analyses of the biofilm. Results indicated that while no single agent completely eradicated the biofilm, the 'Poloxamer gel' activated with 'H2O2' exhibited promising results. It minimized re-contamination of the pellicle by significantly lowering the contact angle, indicating enhanced hydrophilicity. This combination also showed a notable reduction in carbon contaminants, suggesting the effective removal of organic residues from the titanium surface, in addition to effectively reducing viable bacterial counts. In conclusion, the 'Poloxamer gel + H2O2' combination emerged as a promising chemical decontamination strategy for peri-implant diseases. It underlines the importance of tailoring treatment methods to the unique microbial challenges in peri-implant diseases and the necessity of combining chemical decontaminating strategies with established mechanical cleaning procedures for optimal management of peri-implant diseases.
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Affiliation(s)
- Badra Hussain
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Roger Simm
- Institute of Oral Biology, University of Oslo, Oslo, Norway
| | - Jaime Bueno
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
- Section of the Postgraduate program in Periodontology, Faculty of Dentistry, Complutense University, Madrid (UCM), Madrid, Spain
| | - Savvas Giannettou
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | | | | | - Håvard Jostein Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
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Hussain B, Khan S, Agger AE, Ellingsen JE, Lyngstadaas SP, Bueno J, Haugen HJ. A Comparative Investigation of Chemical Decontamination Methods for In-Situ Cleaning of Dental Implant Surfaces. J Funct Biomater 2023; 14:394. [PMID: 37623639 PMCID: PMC10455251 DOI: 10.3390/jfb14080394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/12/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
Surface chemistry evaluation is crucial in assessing the efficacy of chemical decontamination products for titanium implants. This study aimed to investigate the effectiveness of chemical decontamination solutions in cleaning a contaminated dental implant surface and to evaluate the potential of combining Pluronic gel with hydrogen peroxide (NuBone®Clean) by evaluating pellicle disruption and re-formation on implant surfaces. In addition, ensuring safety with in vitro and human testing protocols. X-ray Photoelectron Spectroscopy (XPS) was utilised for surface analysis. All the tested gels had some effect on the surface cleanness except for PrefGel®. Among the tested chemical decontamination candidates, NuBone®Clean demonstrated effectiveness in providing a cleaner titanium surface. Furthermore, none of the tested chemical agents exhibited cytotoxic effects, and the safety assessment showed no adverse events. The results of this study highlight the significance of conducting comprehensive evaluations, encompassing safety and efficacy, before introducing new chemical agents for dental treatments. The findings suggest that NuBone®Clean shows potential as a chemical decontamination solution for implant surfaces. However, further investigation through randomised clinical trials is necessary. By adhering to rigorous testing protocols, the development of safe and efficient chemical decontamination strategies can be advanced, benefiting patients and promoting progress in implant dentistry.
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Affiliation(s)
- Badra Hussain
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (B.H.); (A.E.A.); (S.P.L.)
| | - Sadia Khan
- Department of Prosthetics and Oral Function, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (S.K.); (J.E.E.)
| | - Anne Eriksson Agger
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (B.H.); (A.E.A.); (S.P.L.)
| | - Jan Eirik Ellingsen
- Department of Prosthetics and Oral Function, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (S.K.); (J.E.E.)
| | - Ståle Petter Lyngstadaas
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (B.H.); (A.E.A.); (S.P.L.)
| | - Jaime Bueno
- Section of the Postgraduate Program in Periodontology, Faculty of Dentistry, Complutense University of Madrid (UCM), 28040 Madrid, Spain;
| | - Håvard J. Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway; (B.H.); (A.E.A.); (S.P.L.)
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Nandamuri S, Feschuk AM, Maibach HI. A Review of the Efficacy of Easily Accessible Dry Decontaminants for Human Chemical Contamination. J Appl Toxicol 2022; 42:950-960. [PMID: 35275408 DOI: 10.1002/jat.4315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/07/2022] [Accepted: 03/02/2022] [Indexed: 11/09/2022]
Abstract
Soap and water are often considered the gold standard for dermal decontamination. However, recent systematic reviews have shown that these methods often result in incomplete decontamination and may even induce contaminant absorption due to the "wash-in" effect. Therefore, it is important to gain insight on other decontamination methods. A literature search was done using PubMed to find experimental studies relating to dry decontamination performed with readily available items. Seven studies met eligibility criteria, and the study model, dry decontaminant, method of dry decontamination, method of analyzing decontamination, and main conclusions from each study were extracted, summarized and compared. Important conclusions include that all studies investigated found that dry decontamination yielded decreases in contamination. In addition, it was shown by multiple studies that not only the decontaminant, but the manner in which it is used (method used (blotting, rubbing, etc.), amount used, and whether decontamination instructions are provided to exposed individuals) is vital to success. Finally, in all four studies that investigated wet and dry decontamination combination protocols, combinations were more efficacious than dry decontamination alone. However, this means that dry improvised decontamination can be performed while waiting for the deployment and arrival of further formal decontaminants. These conclusions deserve consideration in the event that universal decontamination guidelines are designed. However, more studies are required in order to draw definitive conclusions regarding the important topic of dermal decontamination.
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Affiliation(s)
- Saisha Nandamuri
- University of California San Francisco, San Francisco, California, United States
| | - Aileen M Feschuk
- Faculty of Medicine, Memorial University of Newfoundland, St John's, Newfoundland & Labrador, Canada
| | - Howard I Maibach
- Department of Dermatology, University of California San Francisco, San Francisco, California, United States
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4
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Green M, Kashetsky N, Feschuk AM, Maibach HI. Efficacy of soap and water-based skin decontamination using in vitro animal models: A systematic review. J Appl Toxicol 2021; 42:942-949. [PMID: 34942017 DOI: 10.1002/jat.4274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/27/2021] [Accepted: 11/08/2021] [Indexed: 11/10/2022]
Abstract
Water and/or soap and water solutions have historically been used as first-line decontamination strategies for a wide variety of dermal contaminants from workplace exposure, environmental pesticides, and civilian chemical warfare. Although water and/or soap and water solutions are often considered a gold standard of decontamination, many studies have found other decontamination methods to be superior. This systematic review summarizes the available data on in vitro animal models contaminated with a various chemicals and their decontamination with water and/or soap and water solutions using in vitro animal models. A comprehensive literature search was performed using Concordance, Embase, PubMed, Medline, Web of Science, and Google Scholar to find in vitro animal studies that provided data on dermal decontamination using water and/or soap and water solutions. Five studies were included that analyzed 11 contaminants across two in vitro animal models (rats and pigs). Water alone was used as a decontamination method for 63.6% of the contaminants (n = 7/11) and water and soap solutions for decontamination in 54.6% of contaminants (n = 6/11). Water alone provided incomplete contaminant removal of five of seven contaminants studied; soap and water did not show significant difference in decontamination when compared with other solutions for all four contaminants and was superior to water for both contaminants studied. Water and/or soap and water are used as decontamination strategies for a variety of dermal contamination events, but for many contaminants, they do not provide complete contamination when compared with newer decontamination solutions studied with in vitro animal models.
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Affiliation(s)
- Maxwell Green
- Faculty of Medicine, Tulane University, New Orleans, LA, USA
| | - Nadia Kashetsky
- Faculty of Medicine, Memorial University of Newfoundland, St John's, Newfoundland and Labrador, Canada
| | - Aileen M Feschuk
- Faculty of Medicine, Memorial University of Newfoundland, St John's, Newfoundland and Labrador, Canada
| | - Howard I Maibach
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
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Dogan OB, Aditya A, Ortuzar J, Clarke J, Wang B. A systematic review and meta-analysis of the efficacy of processing stages and interventions for controlling Campylobacter contamination during broiler chicken processing. Compr Rev Food Sci Food Saf 2021; 21:227-271. [PMID: 34730272 DOI: 10.1111/1541-4337.12860] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 12/13/2022]
Abstract
Systematic review and meta-analysis were conducted to quantify the effects of processing stages and interventions on the prevalence and concentration of Campylobacter on broiler carcasses. To comprehensively capture relevant evidence, six databases were searched using the keywords "Campylobacter" and "broiler chicken." The literature search yielded 10,450 unique citations, and after applying predetermined inclusion and exclusion criteria, 72 and 53 relevant citations were included in meta-analyses for processing stages and interventions, respectively. As the two primary outcomes, log reduction and prevalence changes were estimated for each stage or intervention using a random-effects meta-analysis approach whenever possible. The outcome-level quality assessment was conducted following the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach. The analysis revealed that scalding and chilling majorly reduces the prevalence and concentration of Campylobacter. Immersion chilling reduces the concentration regardless of chemical additives, but its effect on prevalence is not conclusive. The effects of carcass washing applications remain uncertain due to the inconsistency and imprecision of both outcomes. Defeathering and evisceration were identified as stages that can increase both prevalence and concentration. Both chemical and physical processing interventions provide limited efficacy in concentration and prevalence reduction. Major limitations of the review were inconsistency and imprecision at the outcome level and reporting issues and data gaps at the study level. The results are expected to inform quantitative microbial risk assessment model development and support evidence-based decision-making.
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Affiliation(s)
- Onay B Dogan
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Anand Aditya
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Juan Ortuzar
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Jennifer Clarke
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.,Department of Statistics, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Bing Wang
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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6
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Burli A, Kashetsky N, Feschuk A, Law RM, Maibach HI. Efficacy of soap and water based skin decontamination using in vivo animal models: a systematic review. J Toxicol Environ Health B Crit Rev 2021; 24:325-336. [PMID: 34278982 DOI: 10.1080/10937404.2021.1943087] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Water-only or soap and water solutions are considered a gold standard for skin decontamination. However, there is lack of conclusive data regarding their efficacy. The aim of this study was to summarize in vivo animal model data on skin decontamination using water-only, and/or soap and water. Covidence, Embase, MEDLINE, PubMed, Web of Science, and Google Scholar were searched to identify relevant articles using water-only or soap and water decontamination methods in in vivo animals. Data extraction was completed from studies, representing three animal models, and 11 contaminants. Results demonstrated water-only decontamination solutions led to complete decontamination in 3.1% (n = 16/524) protocols, incomplete decontamination in 90.6% (n = 475/524) of protocols, and mortality in 6.3% (n = 33/524) of protocols. Soap and water decontamination solutions resulted in complete decontamination in 6.9% (n = 8/116) protocols, incomplete decontamination in 92.2% (n = 107/116) of protocols, and mortality in 6.9% (n = 8/116) of protocols. Although water only, or soap and water is considered a gold standard for skin decontamination, most papers investigated found that water only, and soap and water provided incomplete decontamination. Due to the insufficient data, and limitations that hinder the applicability of available data, evidence indicates that more contemporary studies investigating skin decontamination are needed, and compared to other model species, including humans, when practical.
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Affiliation(s)
- Anuk Burli
- Faculty of Medicine and Dentistry, University of Rochester, Rochester, New York, United States
| | - Nadia Kashetsky
- Faculty of Medicine, Memorial University, St John's, Newfoundland & Labrador, Canada
| | - Aileen Feschuk
- Faculty of Medicine, Memorial University, St John's, Newfoundland & Labrador, Canada
| | - Rebecca M Law
- Faculty of Medicine, Memorial University, St John's, Newfoundland & Labrador, Canada
- School of Pharmacy, Memorial University, St. John's, Newfoundland & Labrador, Canada
| | - Howard I Maibach
- Department of Dermatology, University of California San Francisco, San Francisco, California, United States
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Kashetsky N, Law RM, Maibach HI. Efficacy of water skin decontamination in vivo in humans: A systematic review. J Appl Toxicol 2021; 42:346-359. [PMID: 34448236 DOI: 10.1002/jat.4230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/01/2021] [Accepted: 08/11/2021] [Indexed: 11/05/2022]
Abstract
With the constant possibility of occupational exposures, chemical warfare, and targeted attacks, increased attention has been given to determining effective and timely dermal decontamination strategies. This systematic review summarises experimental studies reporting decontamination with water-based solutions of dermal chemical contaminants with in vivo human data. Embase, MEDLINE, PubMed, Web of Science, and Google Scholar databases were comprehensively searched using search terms ("cutaneous" or "skin" or "dermal" or "percutaneous") and ("decontamination" or "decontaminant" or "skin decontamination") to include 10 studies, representing 18 chemical contaminants, 199 participants, and 351 decontamination outcomes. Three studies included data from decontamination with water (10.8%, n = 38/351 decontamination outcomes), seven with soap and water (68.4%, n = 240/351 decontamination outcomes), and two with 10% isopropanol distilled water (20.8%, n = 73/351 decontamination outcomes). Results of dermal decontamination using water showed complete decontamination (CD) outcomes in 52.6% (n = 20/38) and partial decontamination (PD) in 47.4% (n = 18/38); using soap and water showed PD outcomes in 92.9% (n = 223/240) and minimal to no effect in 7.1% (n = 17/240); and using 10% isopropanol distilled water achieved PD outcomes in 100.0% (n = 73/73). Available data show that decontamination with water, soap and water, and 10% isopropanol distilled water is incomplete. Much remains to be learned about decontamination of the large variety of chemical contaminants including a range of molecular weights, lipid and water solubilities, melting points, volatility, and hydrogen bonds, as well as clinically relevant anatomic sites. A major void exists in data confirming or denying the completeness of decontamination by measuring absorption and excretion. The development of effective decontamination solutions is of high priority.
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Affiliation(s)
- Nadia Kashetsky
- Faculty of Medicine, Memorial University, St. John's, Newfoundland and Labrador, Canada
| | - Rebecca M Law
- Faculty of Medicine, Memorial University, St. John's, Newfoundland and Labrador, Canada.,School of Pharmacy, Memorial University, St. John's, Newfoundland and Labrador, Canada
| | - Howard I Maibach
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
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Simon N, Odou P, Decaudin B, Bonnabry P, Fleury-Souverain S. Chemical Decontamination of Hazardous Drugs: A Comparison of Solution Performances. Ann Work Expo Health 2021; 64:114-124. [PMID: 31848570 DOI: 10.1093/annweh/wxz093] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 10/15/2019] [Accepted: 11/29/2019] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Over the past 40 years, numerous actions have been undertaken to decrease the contamination of hospital facilities by intravenous conventional antineoplastic drugs (ICADs) such as centralizing compounding in pharmacies, using personal protective equipment, specific compounding, or infusion devices. As recently proposed in the <USP800> monograph, an additional specific decontamination step must be envisaged. A recent literature review analysed and discussed the different solutions tested in terms of decontamination efficacy. This article aims to discuss the performance of these solutions in the framework of aseptic compounding. METHODS The same dataset used in the previous literature review was reanalysed according to other parameters so as to select decontamination solutions: overall decontamination efficiency (EffQ), tested contaminants, and the risks of use in daily practice. RESULTS Using an EffQ threshold of 90% resulted in discarding 26 out of the 59 solutions. Solutions were tested differently: 8 on 1 contaminant, 11 on 2 contaminants, and 14 solutions on between 3 and 11 contaminants. Three risks were identified to help make choices in routine practice: the mutagenicity of degradation products, the safety of operators and facilities, and respect for the aseptic environment. CONCLUSIONS From the results, performance is discussed according to specific situations: a one-time incident or the basic chemical contamination due to daily practice. Accordingly, the decontamination solution selected then required a risk analysis and an evaluation before implementing it in the daily practice of a compounding unit.
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Affiliation(s)
- Nicolas Simon
- Pharmacy, Geneva University Hospitals and School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland.,Univ. Lille, CHU Lille, EA 7365-GRITA-Groupe de Recherche sur les Formes Injectables et les Technologies Associées, Lille, France
| | - Pascal Odou
- Univ. Lille, CHU Lille, EA 7365-GRITA-Groupe de Recherche sur les Formes Injectables et les Technologies Associées, Lille, France
| | - Bertrand Decaudin
- Univ. Lille, CHU Lille, EA 7365-GRITA-Groupe de Recherche sur les Formes Injectables et les Technologies Associées, Lille, France
| | - Pascal Bonnabry
- Pharmacy, Geneva University Hospitals and School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
| | - Sandrine Fleury-Souverain
- Pharmacy, Geneva University Hospitals and School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
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Hojnik N, Cvelbar U, Tavčar-Kalcher G, Walsh JL, Križaj I. Mycotoxin Decontamination of Food: Cold Atmospheric Pressure Plasma versus "Classic" Decontamination. Toxins (Basel) 2017; 9:toxins9050151. [PMID: 28452957 PMCID: PMC5450699 DOI: 10.3390/toxins9050151] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 11/21/2022] Open
Abstract
Mycotoxins are secondary metabolites produced by several filamentous fungi, which frequently contaminate our food, and can result in human diseases affecting vital systems such as the nervous and immune systems. They can also trigger various forms of cancer. Intensive food production is contributing to incorrect handling, transport and storage of the food, resulting in increased levels of mycotoxin contamination. Mycotoxins are structurally very diverse molecules necessitating versatile food decontamination approaches, which are grouped into physical, chemical and biological techniques. In this review, a new and promising approach involving the use of cold atmospheric pressure plasma is considered, which may overcome multiple weaknesses associated with the classical methods. In addition to its mycotoxin destruction efficiency, cold atmospheric pressure plasma is cost effective, ecologically neutral and has a negligible effect on the quality of food products following treatment in comparison to classical methods.
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Affiliation(s)
- Nataša Hojnik
- Jožef Stefan Institute, Department of Surface Engineering and Optoelectronics, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
- Jožef Stefan International Postgraduate School, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
| | - Uroš Cvelbar
- Jožef Stefan Institute, Department of Surface Engineering and Optoelectronics, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
- Jožef Stefan International Postgraduate School, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
| | - Gabrijela Tavčar-Kalcher
- University of Ljubljana, Veterinary Faculty, Institute of Food Safety, Feed and Environment, Gerbičeva 60, SI-1000 Ljubljana, Slovenia.
| | - James L Walsh
- University of Liverpool, Department of Electrical, Engineering and Electronics, Brownlow Hill, Liverpool L69 3GJ, UK.
| | - Igor Križaj
- Jožef Stefan Institute, Department of Molecular and Biomedical Sciences, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
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Kumar V, Goel R, Chawla R, Silambarasan M, Sharma RK. Chemical, biological, radiological, and nuclear decontamination: Recent trends and future perspective. J Pharm Bioallied Sci 2011; 2:220-38. [PMID: 21829318 PMCID: PMC3148627 DOI: 10.4103/0975-7406.68505] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 07/02/2010] [Accepted: 07/06/2010] [Indexed: 11/30/2022] Open
Abstract
Chemical, biological, radiological, and nuclear (CBRN) decontamination is the removal of CBRN material from equipment or humans. The objective of the decontamination is to reduce radiation burden, salvage equipment, and materials, remove loose CBRN contaminants, and fix the remaining in place in preparation for protective storage or permanent disposal work activities. Decontamination may be carried out using chemical, electrochemical, and mechanical means. Like materials, humans may also be contaminated with CBRN contamination. Changes in cellular function can occur at lower radiation doses and exposure to chemicals. At high dose, cell death may take place. Therefore, decontamination of humans at the time of emergency while generating bare minimum waste is an enormous task requiring dedication of large number of personnel and large amount of time. General principles of CBRN decontamination are discussed in this review with emphasis on radiodecontamination.
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Affiliation(s)
- Vinod Kumar
- Division of CBRN Defence, Institute of Nuclear Medicine and Allied Sciences, Brig. S K Mazumdar Marg, Delhi - 110054, India
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Abstract
CONTEXT Dimethylamine borane (DMAB) is a reducing agent used in nonelectric plating of semiconductors. Exposures are usually through occupational contact. We report here four cases of people who suffered from work-related exposure to DMAB. CASE PRESENTATION Three patients exposed to DMAB decontaminated immediately by drinking a lot of water; they reported dizziness, nausea, diarrhea 6-8 hr later. The other patient did not decontaminate at once, and he suffered from more severe symptoms, including dizziness, nausea, limb numbness, slurred speech, irritable mood, and ataxia 13 hr later. Magnetic resonance imaging showed symmetric lesions with hyperintensity on T2WI and FLAIR in bilateral cerebellar dantate nuclei. This patient was readmitted to the hospital due to difficulty in walking and climbing 18 days after exposure. Lower leg weakness and drop foot were found bilaterally. A nerve conduction study revealed polyneuropathy with motor-predominant axonal degeneration. This patient receives regular outpatient followups and still walks with a clumsy gait and has difficulty with hand-grasping activity. DISCUSSION This case study demonstrates that DMAB is highly toxic to humans through any route of exposure, and dermal absorption is the major route of neurotoxicity. DMAB induces acute cortical and cerebellar injuries and delayed peripheral neuropathy. RELEVANCE Further investigation of the toxic mechanism of DMAB is warranted. Early decontamination with copious water is the best current treatment for exposure to DMAB.
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Affiliation(s)
- Yu-Tse Tsan
- Department of Emergency, Taichung Veterans General Hospital, Taichung, Taiwan, Republic of China
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