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Zhang S, Du Q, Wang J, Huang Y, Xia F. Pore-Size-Dependent Role of Functional Elements at the Outer Surface and Inner Wall in Single-Nanochannel Biosensors. Anal Chem 2024; 96:7163-7171. [PMID: 38664895 DOI: 10.1021/acs.analchem.4c00740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Biological nanopores feature functional elements on the outer surfaces (FEOS) and inner walls (FEIW), enabling precise control over ions and molecules with exceptional sensitivity and specificity. This provides valuable inspiration to scientists for the development of intelligent artificial nanochannel-based platforms, with a wide range of potential applications, including biosensors. Much effort has been dedicated to investigating the distinct contribution of FEOS and FEIW of multichannel membrane biosensors. However, the intricate interactions among neighboring pores in multichannel biosensors have presented challenges. This underscores the untapped potential of single nanochannels as ideal candidates in this field. Here, we employed single nanochannel membranes with different pore sizes to investigate the distinct contributions of FEIW and FEOS to single-nanochannel biosensors, combined with numerical simulations. Our findings revealed that alterations in the negative charges of FEIW and FEOS, induced by target binding, have differential effects on ion transport, contingent upon the degree of nanoconfinement. In the case of smaller pores, such as 20 nm, the ion concentration polarization driven by FEIW can independently control ion transport through the surface's electric double layer. However, as the pore size increases to 40-60 nm, both FEIW and FEOS become essential for effective ion concentration polarization. When the pore size reaches 100 nm, both FEIW and FEOS are ineffective and thus unsuitable for biosensors. Simulations demonstrate that the observed phenomena can be attributed to the interactions between the charges of FEIW and FEOS within the overlapping electric double layer under confinement. These results underscore the critical role of pore size as a key parameter in governing the functionality of probes within or on nanopore-based biosensors as well as in the design of nanopore-based devices.
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Affiliation(s)
- Shouwei Zhang
- National Local Joint Laboratory for Advanced Textile Processing and Clean Production, Wuhan Textile University, Wuhan 430200, China
| | - Qiujiao Du
- School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
| | - Jinfeng Wang
- National Local Joint Laboratory for Advanced Textile Processing and Clean Production, Wuhan Textile University, Wuhan 430200, China
| | - Yu Huang
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Fan Xia
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
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Sheng D, Zhang L, Shang H, Guo B, Li Y. The Surface of a PMP Hollow Fiber Membrane Was Modified with a Diamond-like Carbon Film to Enhance the Blood Compatibility of an Artificial Lung Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:13258-13266. [PMID: 37671981 DOI: 10.1021/acs.langmuir.3c01711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
The contact between the blood and the surface of medical materials causes a series of rejection reactions. In this process, the plasma protein is adsorbed to the surface of materials within seconds and binds to glycoprotein receptors on platelets, causing platelet activation, coagulation cascade, and complement activation to form thrombus, which greatly limits the application of medical materials. In our work, the surface of poly(4-methyl-1-pentene) hollow fiber membranes (PMP HFMs) was coated with a diamond-like carbon (DLC) film by the ion plating method. The blood compatibility of the DLC coating was evaluated by protein adsorption, platelet adhesion, clotting time, red blood cell (RBCs) hemolysis, dynamic coagulation, and extracorporeal blood circulation tests. Compared with the unmodified PMP membrane, the DLC film could effectively reduce protein adsorption and platelet adhesion and prolong the coagulation time. The DLC coating showed BSA adsorption of as low as 0.53 μg/cm2 as well as a long activated partial thromboplastin time (APTT) value of 71.84 s. Furthermore, the PMP membrane modified with the DLC coating was used for extracorporeal blood circulation without thrombosis forming within 28 days. The DLC coating is one of the most promising medical coatings as an artificial lung membrane in extracorporeal membrane oxygenation (ECMO) equipment.
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Affiliation(s)
- Donghai Sheng
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Lin Zhang
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Hongfei Shang
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Baoming Guo
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Yuan Li
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing 402160, China
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Diamond-like Carbon Coatings in the Biomedical Field: Properties, Applications and Future Development. COATINGS 2022. [DOI: 10.3390/coatings12081088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Repairment and replacement of organs and tissues are part of the history of struggle against human diseases, in addition to the research and development (R&D) of drugs. Acquisition and processing of specific substances and physiological signals are very important to understand the effects of pathology and treatment. These depend on the available biomedical materials. The family of diamond-like carbon coatings (DLCs) has been extensively applied in many industrial fields. DLCs have also been demonstrated to be biocompatible, both in vivo and in vitro. In many cases, the performance of biomedical devices can be effectively enhanced by coating them with DLCs, such as vascular stents, prosthetic heart valves and surgical instruments. However, the feasibility of the application of DLC in biomedicine remains under discussion. This review introduces the current state of research and application of DLCs in biomedical devices, their potential application in biosensors and urgent problems to be solved. It will be useful to build a bridge between DLC R&D workers and biomedical workers in order to develop high-performance DLC films/coatings, promote their practical use and develop their potential applications in the biomedical field.
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Secker TJ, Leighton TG, Offin DG, Birkin PR, Hervé RC, Keevil CW. A cold water, ultrasonically activated stream efficiently removes proteins and prion-associated amyloid from surgical stainless steel. J Hosp Infect 2020; 106:649-656. [PMID: 32956784 PMCID: PMC7501313 DOI: 10.1016/j.jhin.2020.09.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 11/30/2022]
Abstract
Background Sterile service department decontamination procedures for surgical instruments struggle to demonstrate efficient removal of the hardiest infectious contaminants, such as prion proteins. A recently designed novel system, which uses a low pressure ultrasonically activated, cold water stream, has previously demonstrated efficient hard surface cleaning of several biological contaminants. Aim To test the efficacy of an ultrasonically activated stream for the removal of tissue proteins, including prion-associated amyloid, from surgical stainless steel surfaces. Methods Test surfaces were contaminated with 22L, ME7 or 263K prion-infected brain homogenates. The surfaces were treated with the ultrasonically activated water stream for contact times of 5 and 10 s. Residual proteinaceous and amyloid contamination were quantified using sensitive microscopic analysis, and immunoblotting was used to characterize the eluted prion residues before and after treatment with the ultrasonically activated stream. Findings Efficient removal of the different prion strains from the surgical stainless steel surfaces was observed, and reduced levels of protease-susceptible and -resistant prion protein was detected in recovered supernatant. Conclusion This study demonstrated that an ultrasonically activated stream has the potential to be a cost-effective solution to improve current decontamination practices and has the potential to reduce hospital-acquired infections.
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Affiliation(s)
- T J Secker
- Environmental Healthcare Unit, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK.
| | - T G Leighton
- Institute of Sound and Vibration Research, Faculty of Engineering and Environment, University of Southampton, Southampton, UK; Sloan Water Technology Ltd, Chilworth, Southampton, UK
| | - D G Offin
- Chemistry, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
| | - P R Birkin
- Chemistry, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
| | - R C Hervé
- Environmental Healthcare Unit, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
| | - C W Keevil
- Environmental Healthcare Unit, School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
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Bruna CQM, de Souza RQ, Graziano KU. Review: Trends in Processing Prion-Contaminated Surgical Instruments. Biomed Instrum Technol 2020; 54:332-337. [PMID: 33049773 DOI: 10.2345/0899-8205-54.5.332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This review sought to provide an overview of proposed methods and protocols for processing surgical instruments contaminated with prions. A search of PubMed was conducted to identify studies published between January 1, 2012, and January 2, 2019, with no language restrictions and using varying combinations of the following terms: prions (Medical Subject Heading [MeSH]) OR decontamination (MeSH) OR cleaning OR disinfection OR sterilization. Articles were excluded if they did not involve medical device surfaces or describe the processing protocol. At least two reviewers independently selected articles, extracted data, and assessed data. A total of 627 articles published in peer-reviewed journals were identified. Of the 55 articles assessed for full-text eligibility, eight met the inclusion criteria. Only a few studies investigated protocols and methods for processing prion-contaminated medical devices; therefore, determining the best way to sterilize device surfaces and preserve the integrity of surgical instruments remains challenging. Moreover, the perspective of sterile processing department staff continues to be overlooked when designing studies.
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Sun W, Liu W, Wu Z, Chen H. Chemical Surface Modification of Polymeric Biomaterials for Biomedical Applications. Macromol Rapid Commun 2020; 41:e1900430. [DOI: 10.1002/marc.201900430] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 02/08/2020] [Accepted: 02/16/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Wei Sun
- College of ChemistryChemical Engineering and Materials ScienceCollaborative Innovation Center for New Type Urbanization and Social Governance of Jiangsu ProvinceSoochow University Suzhou 215123 P. R. China
| | - Wenying Liu
- College of ChemistryChemical Engineering and Materials ScienceCollaborative Innovation Center for New Type Urbanization and Social Governance of Jiangsu ProvinceSoochow University Suzhou 215123 P. R. China
| | - Zhaoqiang Wu
- College of ChemistryChemical Engineering and Materials ScienceCollaborative Innovation Center for New Type Urbanization and Social Governance of Jiangsu ProvinceSoochow University Suzhou 215123 P. R. China
| | - Hong Chen
- College of ChemistryChemical Engineering and Materials ScienceCollaborative Innovation Center for New Type Urbanization and Social Governance of Jiangsu ProvinceSoochow University Suzhou 215123 P. R. China
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Alias R, Mahmoodian R, Genasan K, Vellasamy KM, Hamdi Abd Shukor M, Kamarul T. Mechanical, antibacterial, and biocompatibility mechanism of PVD grown silver-tantalum-oxide-based nanostructured thin film on stainless steel 316L for surgical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 107:110304. [PMID: 31761210 DOI: 10.1016/j.msec.2019.110304] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 10/10/2019] [Accepted: 10/10/2019] [Indexed: 10/25/2022]
Abstract
Surgical site infection associated with surgical instruments has always been a factor in delaying post-operative recovery of patients. The evolution in surface modification of surgical instruments can be a potential choice to overcome the nosocomial infection mainly caused by bacterial populations such as Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. A study was, therefore, conducted characterising the morphology, hydrophobicity, adhesion strength, phase, Nano-hardness, surface chemistry, antimicrobial and biocompatibility of SS 316L steel deposited with a Nano-composite layer of Silver (Ag) and Tantalum oxide (Ta2O5) using physical vapour deposition magnetron sputtering. The adhesion strength of Ag/AgTa2O5 coating on SS 316L and treated at 250-850 °C of thermal treatment was evaluated using micro-scratch. The Ag/Ag-Ta2O5-400 °C was shown a 154% improvement in adhesion strength on SS 316L when compared with as-sputtered layer or Ag/Ag-Ta2O5-250, 550, 700 and 850 °C. The FESEM, XPS, and XRD indicated the segregation of Ag on the surface of SS 316L after the crystallization. Wettability and Nano-indentation tests demonstrated an increase in hydrophobicity (77.3 ± 0.3°) and Nano-hardness (1.12 ± 0.43 GPa) when compared with as-sputtered layer, after the 400 °C of thermal treatment. The antibacterial performance on Ag/Ag-Ta2O5-400 °C indicated a significant zone of inhibition to Staphylococcus aureus (A-axis: 16.33 ± 0.58 mm; B-axis: 25.67 ± 0.58 mm, p < 0.01) and Escherichia coli (A-axis: 16.33 ± 1.15 mm; B-axis: 26.00 ± 0.00 mm, p < 0.01) when compared with SS 316L or Ag/Ag-Ta2O5-700 °C, which showed no inhibition. The biocompatibility tests on Ag/Ag-Ta2O5-400 °C demonstrated an excellent in cell attachment, F-actin protein expression and proliferation/viability of bone marrow derived mesenchymal stromal on day 14 when compared with uncoated or Ag/Ag-Ta2O5-700 °C. This study shows that the Ag segregation process, hydrophobicity, adhesion strength, crystallization, and hardness progressively improved after the annealing up to 400 °C.
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Affiliation(s)
- Rodianah Alias
- Department of Manufacturing Technology, Faculty of Innovative Design & Technology, University Sultan Zainal Abidin, 21030, Kuala Terengganu, Malaysia.
| | - Reza Mahmoodian
- School of Mechanical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia; Department of Research and Development, Azarin Kar Ind. Co., Industrial Park 1, Kerman, Iran.
| | - Krishnamurithy Genasan
- Tissue Engineering Group (TEG), Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - K M Vellasamy
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Mohd Hamdi Abd Shukor
- Chancellery Office, The National University of Malaysia, 43600, UKM Bangi, Selangor, Malaysia; Centre of Advanced Manufacturing and Materials Processing (AMMP), Department of Mechanical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia; Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Tunku Kamarul
- Tissue Engineering Group (TEG), Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Mishra R, Pramanick B, Maiti TK, Bhattacharyya TK. Glassy carbon microneedles-new transdermal drug delivery device derived from a scalable C-MEMS process. MICROSYSTEMS & NANOENGINEERING 2018; 4:38. [PMID: 31057926 PMCID: PMC6295442 DOI: 10.1038/s41378-018-0039-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 09/04/2018] [Accepted: 09/26/2018] [Indexed: 05/26/2023]
Abstract
Because carbon is the basic element of all life forms and has been successfully applied as a material for medical applications, it is desirable to investigate carbon for drug delivery applications, as well. In this work, we report the fabrication of a hollow carbon microneedle array with flow channels using a conventional carbon-microelectromechanical system (C-MEMS) process. This process utilizes the scalable and irreversible step of pyrolysis, where prepatterned SU-8 microneedles (precursor) are converted to glassy carbon structures in an inert atmosphere at high temperature (900 °C) while retaining their original shape upon shrinkage. Once converted to glassy carbon, the microneedles inherit the unique properties of hardness, biocompatibility, and thermal and chemical resistance associated with this material. A comparative study of hardness and Young's modulus for carbon microneedles and SU-8 microneedles was performed to evaluate the increased strength of the microneedles induced by the C-MEMS process steps. Structural shrinkage of the carbon microneedles upon pyrolysis was observed and estimated. Material characterizations including energy-dispersive X-ray spectroscopy (EDX) and Raman spectroscopy were carried out to estimate the atomic percentage of carbon in the microneedle structure and its crystalline nature, respectively. Our investigations confirm that the microneedles are glassy in nature. Compression and bending tests were also performed to determine the maximum forces that the carbon microneedles can withstand, and it was found that these forces were approximately two orders of magnitude higher than the resistive forces presented by skin. A microneedle array was inserted into mouse skin multiple times and was successfully removed without the breakage of any microneedles.
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Affiliation(s)
- Richa Mishra
- Advanced Technology Development Center, IIT Kharagpur, Kharagpur, West Bengal 721302 India
| | - Bidhan Pramanick
- Department of Mechanical Engineering, IIT Kharagpur, Kharagpur, West Bengal 721302 India
- Present Address: School of Electrical Sciences, IIT Goa, Ponda, Goa 403401 India
| | - Tapas Kumar Maiti
- Biotechnology Department, IIT Kharagpur, Kharagpur, West Bengal 721302 India
| | - Tarun Kanti Bhattacharyya
- Department of Electronics and Electrical Communication Engineering, IIT Kharagpur, Kharagpur, West Bengal 721302 India
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Sui X, Xu R, Liu J, Zhang S, Wu Y, Yang J, Hao J. Tailoring the Tribocorrosion and Antifouling Performance of (Cr, Cu)-GLC Coatings for Marine Application. ACS APPLIED MATERIALS & INTERFACES 2018; 10:36531-36539. [PMID: 30273491 DOI: 10.1021/acsami.8b12359] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Doped graphite-like coating (GLC) has aroused great interest as one of the most promising protective materials in marine applications. However, there is a lack of systematic research on the tribocorrosion and antifouling performance of doped GLC coatings in harsh marine environments. Herein, a multifunctional (Cr, Cu)-GLC coating with combined antifouling and tribocorrosion properties was prepared via a magnetron sputtering method. The experimental results indicate that the resultant coatings changed from a dense structure to a loose columnar structure with the increment of Cr and Cu doping amount. At the same time, the hardness of the coating gradually decreases, but the contact angle between coating and seawater gradually increases. The algae adhesion test reveal that the algae density on the surface of the (Cr, Cu)-GLC coating decreases from about 565 to 70/mm2 as the amount of doping increased. However, on the contrary, the friction coefficient of the coating under OCP condition increases from 0.06 to about 0.35. Overall, the mild doped (Cr, Cu)-GLC coating exhibits the best comprehensive properties, combining antifouling and tribocorrosion properties. The corresponded mechanisms are discussed in terms of the coating microstructure, antifouling, and tribocorrosion behavior.
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Affiliation(s)
- Xudong Sui
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
- Qingdao Center of Resource Chemistry and New Materials , Qingdao 266000 , China
| | - Rongnian Xu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jian Liu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
- Qingdao Center of Resource Chemistry and New Materials , Qingdao 266000 , China
| | - Shuaituo Zhang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
- Qingdao Center of Resource Chemistry and New Materials , Qingdao 266000 , China
| | - Yang Wu
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
- Qingdao Center of Resource Chemistry and New Materials , Qingdao 266000 , China
| | - Jun Yang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
| | - Junying Hao
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Science , Lanzhou 730000 , China
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Ward H, Molesworth A, Holmes S, Sinka K. Public health: surveillance, infection prevention, and control. HANDBOOK OF CLINICAL NEUROLOGY 2018; 153:473-484. [PMID: 29887154 DOI: 10.1016/b978-0-444-63945-5.00027-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Human prion diseases, though relatively rare, remain an ongoing public health problem. They are fatal diseases, with unconventional host responses and no early diagnostic tests or robust treatments. Public health measures were put in place to protect the food chain in the United Kingdom from the late 1980s, with similar measures following elsewhere. However, human prion diseases are transmissible through other routes, including through blood transfusion and surgery. As a result, the public health threat remains for all forms of human prion diseases and makes continued surveillance and infection prevention and control imperative.
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Affiliation(s)
- Hester Ward
- NHS National Services Scotland, Edinburgh, United Kingdom; Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, United Kingdom.
| | - Anna Molesworth
- National CJD Research and Surveillance Unit, Western General Hospital, Edinburgh, United Kingdom
| | - Sulisti Holmes
- NHS National Services Scotland, Edinburgh, United Kingdom
| | - Katy Sinka
- Centre for Infectious Disease Surveillance and Control, National Infection Service, Public Health England, London, United Kingdom
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Electrochemical detection of hydrogen peroxide on platinum-containing tetrahedral amorphous carbon sensors and evaluation of their biofouling properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 55:70-8. [DOI: 10.1016/j.msec.2015.05.060] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/24/2015] [Accepted: 05/18/2015] [Indexed: 11/20/2022]
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12
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Kaivosoja E, Tujunen N, Jokinen V, Protopopova V, Heinilehto S, Koskinen J, Laurila T. Glutamate detection by amino functionalized tetrahedral amorphous carbon surfaces. Talanta 2015; 141:175-81. [DOI: 10.1016/j.talanta.2015.04.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 03/24/2015] [Accepted: 04/02/2015] [Indexed: 10/23/2022]
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13
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Secker TJ, Pinchin HE, Hervé RC, Keevil CW. Efficacy of humidity retention bags for the reduced adsorption and improved cleaning of tissue proteins including prion-associated amyloid to surgical stainless steel surfaces. BIOFOULING 2015; 31:535-541. [PMID: 26263927 DOI: 10.1080/08927014.2015.1067686] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Increasing drying time adversely affects attachment of tissue proteins and prion-associated amyloid to surgical stainless steel, and reduces the efficacy of commercial cleaning chemistries. This study tested the efficacy of commercial humidity retention bags to reduce biofouling on surgical stainless steel and to improve subsequent cleaning. Surgical stainless steel surfaces were contaminated with ME7-infected brain homogenates and left to dry for 15 to 1,440 min either in air, in dry polythene bags or within humidity retention bags. Residual contamination pre/post cleaning was analysed using Thioflavin T/SYPRO Ruby dual staining and microscope analysis. An increase in biofouling was observed with increased drying time in air or in sealed dry bags. Humidity retention bags kept both protein and prion-associated amyloid minimal across the drying times both pre- and post-cleaning. Therefore, humidity bags demonstrate a cheap, easy to implement solution to improve surgical instrument reprocessing and to potentially reduce associated hospital acquired infections.
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Affiliation(s)
- T J Secker
- a Environmental Healthcare Unit, Centre for Biological Sciences , University of Southampton , Southampton , UK
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14
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Birkin PR, Offin DG, Vian CJB, Howlin RP, Dawson JI, Secker TJ, Hervé RC, Stoodley P, Oreffo ROC, Keevil CW, Leighton TG. Cold water cleaning of brain proteins, biofilm and bone – harnessing an ultrasonically activated stream. Phys Chem Chem Phys 2015. [DOI: 10.1039/c5cp02406d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ability of acoustically active bubbles to remove a range of biological contaminants is demonstrated in an ultrasonically activated stream.
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Affiliation(s)
| | | | | | - R. P. Howlin
- National Centre for Advanced Tribology at Southampton
- University of Southampton
- UK
| | - J. I. Dawson
- Centre for Human Development
- Stem Cells and Regeneration
- Medicine
- University of Southampton
- UK
| | - T. J. Secker
- Centre for Biological Sciences
- University of Southampton
- UK
| | - R. C. Hervé
- Centre for Biological Sciences
- University of Southampton
- UK
| | - P. Stoodley
- National Centre for Advanced Tribology at Southampton
- University of Southampton
- UK
| | - R. O. C. Oreffo
- Centre for Human Development
- Stem Cells and Regeneration
- Medicine
- University of Southampton
- UK
| | - C. W. Keevil
- Centre for Biological Sciences
- University of Southampton
- UK
| | - T. G. Leighton
- Institute of Sound and Vibration Research
- University of Southampton
- UK
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15
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Karasin M. Special Needs Populations: Perioperative Care of the Patient With Creutzfeldt-Jakob Disease. AORN J 2014; 100:390-410. [DOI: 10.1016/j.aorn.2014.06.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 06/30/2014] [Indexed: 12/15/2022]
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