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Juhász ÁG, Nanys M, Pinke B, Fadel A, Godzierz M, Juriga-Tóth K, Molnár K, Juriga D, Jedlovszky-Hajdú A. Formation of Three-Dimensional Polysuccinimide Electrospun Fiber Meshes Induced by the Combination of CaCl 2 and Humidity. Macromol Rapid Commun 2024; 45:e2300625. [PMID: 38206977 DOI: 10.1002/marc.202300625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/03/2024] [Indexed: 01/13/2024]
Abstract
Even though electrospinning is getting more and more attention, the preparation of 3D nanofibrous meshes is still a big challenge that limits the application of electrospun materials, especially in tissue engineering. To overcome this problem, several solutions are introduced but most of them focus on the postprocessing of the electrospun meshes. This paper presents a straightforward novel method that utilizes the joint effect of the addition of CaCl2 and the relative environmental humidity (RH), which can induce the random 3D formation of polysuccinimide (PSI) electrospun fibers with different such as wrinkled or ribbon-like structures. Although the effect of humidity and inorganic salt additives on the micro and macrostructure of electrospun fibers is known, the connection between the two in this manner has never been presented. To investigate the effect, fibers with different PSI and CaCl2 concentrations at different humidity RH levels are prepared, and their microstructure is visualized with high-resolution scanning electron microscopy (SEM). To reveal the nature of the interaction between the polymer and the CaCl2, Fourier-transformed infrared (FTIR), X-ray diffraction (XRD), and thermogravimetry (TGA) measurements are carried out and 3D nanofibrous structures are obtained.
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Affiliation(s)
- Ákos György Juhász
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvárad tér 4., Budapest, H-1089, Hungary
| | - Monika Nanys
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvárad tér 4., Budapest, H-1089, Hungary
| | - Balázs Pinke
- Department of Polymer Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary
| | - Alexandre Fadel
- UMR 8207, UMET-Unité Matériaux et Transformations, University Lille, CNRS, INRAE, Centrale Lille, Lille, F-59000, France
| | - Marcin Godzierz
- Centre of Polymer and Carbon Materials Polish Academy of Sciences M. Curie-Skłodowskiej 34 Str, Zabrze, 41-819, Poland
| | - Krisztina Juriga-Tóth
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvárad tér 4., Budapest, H-1089, Hungary
| | - Kolos Molnár
- Department of Polymer Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary
- HUN-REN-BME Research Group for Composite Science and Technology, Műegyetem rkp. 3, Budapest, H-1111, Hungary
- MTA-BME Lendület Sustainable Polymers Research Group, Műegyetem rkp. 3, Budapest, H-1111, Hungary
| | - Dávid Juriga
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvárad tér 4., Budapest, H-1089, Hungary
| | - Angéla Jedlovszky-Hajdú
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Nagyvárad tér 4., Budapest, H-1089, Hungary
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2
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Serpelloni S, Williams ME, Caserta S, Sharma S, Rahimi M, Taraballi F. Electrospun Chitosan-Based Nanofibrous Coating for the Local and Sustained Release of Vancomycin. ACS OMEGA 2024; 9:11701-11717. [PMID: 38496925 PMCID: PMC10938330 DOI: 10.1021/acsomega.3c08113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/07/2024] [Accepted: 02/13/2024] [Indexed: 03/19/2024]
Abstract
As the population ages, the number of vascular surgery procedures performed increases. Older adults often have multiple comorbidities, such as diabetes and hypertension, that increase the risk of complications from vascular surgery including vascular graft infection (VGI). VGI is a serious complication with significant morbidity, mortality, and healthcare costs. Here, we aimed to develop a nanofibrous chitosan-based coating for vascular grafts loaded with different concentrations of the vancomycin antibiotic vancomycin (VAN). Blending chitosan with poly(vinyl alcohol) or poly(ethylene oxide) copolymers improved solubility and ease of spinning. Thermal gravimetric analysis and Fourier transform infrared spectroscopy confirmed the presence of VAN in the nanofibrous membranes. Kinetics of VAN release from the nanofibrous mats were evaluated using high-performance liquid chromatography, showing a burst followed by sustained release over 24 h. To achieve longer sustained release, a poly(lactic-co-glycolic acid) coating was applied, resulting in extended release of up to 7 days. Biocompatibility assessment using human umbilical vein endothelial cells demonstrated successful attachment and viability of the nanofiber patches. Our study provides insights into the development of a drug delivery system for vascular grafts aimed at preventing infection during implantation, highlighting the potential of electrospinning as a promising technique in the field of vascular surgery.
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Affiliation(s)
- Stefano Serpelloni
- Center
for Musculoskeletal Regeneration, Houston
Methodist Academic Institute, Houston, Texas 77030-2707, United States
- Department
of Electronics, Information and Bioengineering (DEIB), Politecnico di Milano, Milan 20133, Italy
- Department
of Orthopedics and Sport Medicine, Houston
Methodist Hospital, Houston, Texas 77030-2707, United States
| | - Michael Ellis Williams
- Center
for Musculoskeletal Regeneration, Houston
Methodist Academic Institute, Houston, Texas 77030-2707, United States
- Reproductive
Biology and Gynaecological Oncology Group, Swansea University Medical School, Singleton Park, Swansea SA2 8QA, U.K.
| | - Sergio Caserta
- Department
of Chemical Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80138, Italy
| | - Shashank Sharma
- Department
of Cardiovascular Surgery, Houston Methodist
Hospital, Houston, Texas 77030-2707, United States
| | - Maham Rahimi
- Department
of Cardiovascular Surgery, Houston Methodist
Hospital, Houston, Texas 77030-2707, United States
| | - Francesca Taraballi
- Center
for Musculoskeletal Regeneration, Houston
Methodist Academic Institute, Houston, Texas 77030-2707, United States
- Department
of Orthopedics and Sport Medicine, Houston
Methodist Hospital, Houston, Texas 77030-2707, United States
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3
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Le V, Thompson S, Roden E, Zahasky C. In Situ Measurements of Dynamic Bacteria Transport and Attachment in Heterogeneous Sand-Packed Columns. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:15588-15597. [PMID: 37782746 DOI: 10.1021/acs.est.3c02197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Prevention, mitigation, and regulation of bacterial contaminants in groundwater require a fundamental understanding of the mechanisms of transport and attachment in complex geological materials. Discrepancies in bacterial transport behaviors observed between field studies and laboratory experiments indicate an incomplete understanding of dynamic bacterial transport and immobilization processes in realistic heterogeneous geologic systems. Here, we develop a new experimental approach for in situ quantification of dynamic bacterial transport and attachment distribution in geologic media that relies on radiolabelingEscherichia coliwith positron-emitting radioisotopes and quantifying transport with three-dimensional (3D) positron emission tomography (PET) imaging. Our results indicate that the highest bacterial attachment occurred at the interfaces between sand layers oriented orthogonal to the direction of flow. The predicted bacterial attachment from a 3D numerical model matched the experimental PET results, highlighting that the experimentally observed bacterial transport behavior can be accurately captured with a distribution of a first-order irreversible attachment model. This is the first demonstration of the direct measurement of attachment coefficient distributions from bacterial transport experiments in geologic media and provides a transformational approach to better understand bacterial transport mechanisms, improve model parametrization, and accurately predict how local geologic conditions can influence bacterial fate and transport in groundwater.
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Affiliation(s)
- Vy Le
- Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Sophia Thompson
- Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Eric Roden
- Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Christopher Zahasky
- Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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4
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Mahmoudi-Qashqay S, Zamani-Meymian MR, Sadati SJ. Improving antibacterial ability of Ti-Cu thin films with co-sputtering method. Sci Rep 2023; 13:16593. [PMID: 37789153 PMCID: PMC10547835 DOI: 10.1038/s41598-023-43875-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 09/29/2023] [Indexed: 10/05/2023] Open
Abstract
Due to the resistance of some bacteria to antibiotics, research in the field of dealing with bacterial infections is necessary. A practical approach utilized in this study involves the preparation of an antibacterial thin film on the surfaces, which can effectively inhibit and reduce biofilm formation and bacterial adherence. In this study, we report the fabrication of bactericidal titanium (Ti) and copper (Cu) surfaces which involves a powerful co-sputtering method. This method provides a situation in which constituent elements are deposited simultaneously to control the composition of the thin film. Prepared samples were examined by energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM), and contact angle measurements. To evaluate antibacterial behavior, we used two bacterial strains Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus). Antibacterial activity of the prepared sample was assessed by determining the number of colony-forming units per milliliter (CFU/ml) using a standard viable cell count assay. Results indicated that as the Cu concentration increased, the nanoscale surfaces became rougher, with roughness values rising from 11.85 to 49.65 nm, and the contact angle increased from 40 to 80 degrees, indicating a hydrophilic character. These factors play a significant role in the antibacterial properties of the surface. The Ti-Cu films displayed superior antibacterial ability, with a 99.9% reduction (equivalent to a 5-log reduction) in bacterial viability after 2 h compared to Ti alone against both bacterial strains. Field emission scanning electron microscopy (FE-SEM) images verified that both E. coli and S. aureus cells were physically deformed and damaged the bacterial cell ultrastructure was observed. These findings highlight that adding Cu to Ti can improve the antibacterial ability of the surface while inhibiting bacterial adherence. Therefore, the Ti14-Cu86 sample with the highest percentage of Cu had the best bactericidal rate. Investigation of toxicity of Cu-Ti thin films was conducted the using the MTT assay, which revealed their biocompatibility and absence of cytotoxicity, further confirming their potential as promising biomaterials for various applications.
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Affiliation(s)
- Samaneh Mahmoudi-Qashqay
- Department of Physics, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran
| | | | - Seyed Javad Sadati
- Department of Physics, Iran University of Science and Technology, P.O. Box 16846-13114, Tehran, Iran
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5
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Tansel B. Classification of pores, water diffusivity and penetration characteristics of waste materials, and role of water as electron carrier in landfills: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 340:118028. [PMID: 37121009 DOI: 10.1016/j.jenvman.2023.118028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 04/24/2023] [Accepted: 04/24/2023] [Indexed: 05/12/2023]
Abstract
Coupling of biogeochemical processes occurs between different waste components and waste layers during decomposition of wastes materials deposited in landfills by mechanisms similar to those occurring in marine sediments (i.e., sediment batteries). In landfills, moisture serves as a medium for transfer of electrons and protons under anaerobic conditions for decomposition reactions to proceed spontaneously, although some reactions occur very slowly. However, the role of moisture in landfills in view of pore sizes and pore size distributions, time dependent changes in pore volumes, heterogeneity of waste layers, and associated impacts on moisture retention and transport characteristics in landfills are not well understood. The moisture transport models developed for granular materials (e.g., soils) are not appropriate to describe the conditions at landfills due compressible and dynamic conditions in landfills. During waste decomposition processes, absorbed water and water of hydration can be transformed to free water and/or become mobilized as liquid or vapor, creating a medium for transfer of electrons and protons between waste components and waste layers. The characteristics of different municipal waste components were compiled and analyzed for pore size, surface energy, and moisture retention and penetration for electron-proton transfer for continuance of decomposition reactions in landfills over time. Categorization of pore sizes appropriate for waste components and a representative water retention curve for conditions in landfills were developed to clarify the terminology and highlight the differences between the landfill conditions and granular materials (e.g., soils) for use of appropriate terminologies. Water saturation profile and water mobility were analyzed by considering water as a transfer medium for carrying electrons and protons for sustaining long-term decomposition reactions.
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Affiliation(s)
- Berrin Tansel
- Florida International University, Civil and Environmental Engineering Department, Engineering Center, 10555 West Flagler Street, Miami, FL, 33174, USA.
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6
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Cai A, Abdali Z, Saldanha DJ, Aminzare M, Dorval Courchesne NM. Endowing textiles with self-repairing ability through the fabrication of composites with a bacterial biofilm. Sci Rep 2023; 13:11389. [PMID: 37452128 PMCID: PMC10349112 DOI: 10.1038/s41598-023-38501-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 07/10/2023] [Indexed: 07/18/2023] Open
Abstract
To address the increasing environmental footprint of the fast-growing textile industry, self-repairing textile composites have been developed to allow torn or damaged textiles to restore their morphological, mechanical, and functional features. A sustainable way to create these textile composites is to introduce a coating material that is biologically derived, biodegradable, and can be produced through scalable processes. Here, we fabricated self-repairing textile composites by integrating the biofilms of Escherichia coli (E. coli) bacteria into conventional knitted textiles. The major structural protein component in E. coli biofilm is a matrix of curli fibers, which has demonstrated extraordinary abilities to self-assemble into mechanically strong macroscopic structures and self-heal upon contact with water. We demonstrated the integration of biofilm through three simple, fast, and scalable methods: adsorption, doctor blading, and vacuum filtration. We confirmed that the composites were breathable and mechanically strong after the integration, with improved Young's moduli or elongation at break depending on the fabrication method used. Through patching and welding, we showed that after rehydration, the composites made with all three methods effectively healed centimeter-scale defects. Upon observing that the biofilm strongly attached to the textiles by covering the extruding textile fibers from the self-repair failures, we proposed that the strength of the self-repairs relied on both the biofilm's cohesion and the biofilm-textile adhesion. Considering that curli fibers are genetically-tunable, the fabrication of self-repairing curli-expressing biofilm-textile composites opens new venues for industrially manufacturing affordable, durable, and sustainable functional textiles.
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Affiliation(s)
- Anqi Cai
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC, H3A 0C5, Canada
| | - Zahra Abdali
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC, H3A 0C5, Canada
| | - Dalia Jane Saldanha
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC, H3A 0C5, Canada
| | - Masoud Aminzare
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC, H3A 0C5, Canada
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7
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Tu WC, McManamen AM, Su X, Jeacopello I, Takezawa MG, Hieber DL, Hassan GW, Lee UN, Anana EV, Locknane MP, Stephenson MW, Shinkawa VAM, Wald ER, DeMuri GP, Adams KN, Berthier E, Thongpang S, Theberge AB. At-Home Saliva Sampling in Healthy Adults Using CandyCollect, a Lollipop-Inspired Device. Anal Chem 2023; 95:10211-10220. [PMID: 37364037 DOI: 10.1021/acs.analchem.3c00462] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Respiratory infections are common in children, and there is a need for user-friendly collection methods. Here, we performed the first human subjects study using the CandyCollect device, a lollipop-inspired saliva collection device .We showed that the CandyCollect device can be used to collect salivary bacteria from healthy adults using Streptococcus mutans and Staphylococcus aureus as proof-of-concept commensal bacteria. We enrolled healthy adults in a nationwide (USA) remote study in which participants were sent study packages containing CandyCollect devices and traditional commercially available oral swabs and spit tubes. Participants sampled themselves at home, completed usability and user preference surveys, and mailed the samples back to our laboratory for analysis by qPCR. Our results showed that for participants in which a given bacterium (S. mutans or S. aureus) was detected in one or both of the commercially available methods (oral swab and/or spit tubes), CandyCollect devices had a 100% concordance with the positive result (n = 14 participants). Furthermore, the CandyCollect device was ranked the highest preference sampling method among the three sampling methods by 26 participants surveyed (combining survey results across two enrollment groups). We also showed that the CandyCollect device has a shelf life of up to 1 year at room temperature, a storage period that is convenient for clinics or patients to keep the CandyCollect device and use it any time. Taken together, we have demonstrated that the CandyCollect is a user-friendly saliva collection tool that has the potential to be incorporated into diagnostic assays in clinic visits and telemedicine.
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Affiliation(s)
- Wan-Chen Tu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Anika M McManamen
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Xiaojing Su
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Ingrid Jeacopello
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Meg G Takezawa
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Damielle L Hieber
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Grant W Hassan
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Ulri N Lee
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Eden V Anana
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Mason P Locknane
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Molly W Stephenson
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Victoria A M Shinkawa
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Ellen R Wald
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53792, United States
| | - Gregory P DeMuri
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53792, United States
| | - Karen N Adams
- Institute of Translational Health Sciences, School of Medicine, University of Washington, Seattle, Washington 98109, United States
| | - Erwin Berthier
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Sanitta Thongpang
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
- Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakorn Pathom 73170, Thailand
| | - Ashleigh B Theberge
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
- Department of Urology, School of Medicine, University of Washington, Seattle, Washington 98195, United States
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8
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Dixit S, Varshney S, Gupta D, Sharma S. Textiles as fomites in the healthcare system. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12569-2. [PMID: 37199751 DOI: 10.1007/s00253-023-12569-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/27/2023] [Accepted: 05/03/2023] [Indexed: 05/19/2023]
Abstract
Nosocomial infections or healthcare-associated infections (HAIs) are acquired under medical care in healthcare facilities. In hospital environments, the transmission of infectious diseases through textiles such as white coats, bed linen, curtains, and towels are well documented. Textile hygiene and infection control measures have become more important in recent years due to the growing concerns about textiles as fomites in healthcare settings. However, systematic research in this area is lacking; the factors contributing to the transmission of infections through textiles needs to be better understood. The review aims to critically explore textiles as contaminants in healthcare systems, and to identify potential risks they may pose to patients and healthcare workers. It delineates different factors affecting bacterial adherence on fabrics, such as surface properties of bacteria and fabrics, and environmental factors. It also identifies areas that require further research to reduce the risk of HAIs and improve textile hygiene practices. Finally, the review elaborates on the strategies currently employed, and those that can be employed to limit the spread of nosocomial infections through fabrics. Implementing textile hygiene practices effectively in healthcare facilities requires a thorough analysis of factors affecting fabric-microbiome interactions, followed by designing newer fabrics that discourage pathogen load. KEY POINTS: • Healthcare textiles act as a potential reservoir of nosocomial pathogens • Survival of pathogens is affected by surface properties of fabric and bacteria • Guidelines required for fabrics that discourage microbial load, for hospital use.
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Affiliation(s)
- Shweta Dixit
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, 110016, India
| | - Swati Varshney
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, 110016, India
| | - Deepti Gupta
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, New Delhi, 110016, India
| | - Shilpi Sharma
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, 110016, India.
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9
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Manville E, Kaya EC, Yucel U, Boyle D, Trinetta V. Evaluation of Listeria monocytogenes biofilms attachment and formation on different surfaces using a CDC biofilm reactor. Int J Food Microbiol 2023; 399:110251. [PMID: 37244228 DOI: 10.1016/j.ijfoodmicro.2023.110251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/08/2023] [Accepted: 05/09/2023] [Indexed: 05/29/2023]
Abstract
Listeria monocytogenes can adapt, persist, and form biofilms on food premises surfaces, representing a challenge for food safety, since they led to disease transmission, food contamination and spoilage during production. Physical interventions (scrubbing and wiping) can help controlling formation, nevertheless when biofilms are formed, they are usually very resistant to current control strategies used in the food industry. Biofilm attachment and formation is influenced by environment characteristics, substrate properties and microbial motility. The purpose of this study was to evaluate the ability of L. monocytogenes to attach and form biofilms on different surfaces (wood, nylon, and polycarbonate) representative of the materials used during produce harvesting and storage. Multi-strain L. monocytogenes biofilms were grown in a CDC Biofilm reactor at 20 ± 2 °C up to 96-h and characterized for: a) attachment strength by enumerating cells after rinsing; b) hydrophobicity and interfacial tension by contact angle measurements; c) biofilm architecture by Laser Scanning Confocal Microscopy. All experiments were done in triplicate. Material, incubation, and solvent significantly affected the hydrophobicity and wetting properties of L. monocytogenes biofilms (P < 0.05). The type of material and incubation time significantly influenced hydrophobicity and wetting properties of L. monocytogenes biofilms (P < 0.05). Highest contact angle and lowest interfacial tension were observed on polycarbonate coupons. The data presented contributes to understanding Listeria biofilms grow on different surfaces commonly used in produce harvesting and storage. The data obtained in this study can be used when evaluating intervention strategies to control this pathogen in food premises.
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Affiliation(s)
- E Manville
- Kansas State University, Food Science Institute, 216 Call Hall, Manhattan, KS 66506, USA
| | - E C Kaya
- Kansas State University, Food Science Institute, 216 Call Hall, Manhattan, KS 66506, USA
| | - U Yucel
- Kansas State University, Food Science Institute, 216 Call Hall, Manhattan, KS 66506, USA
| | - D Boyle
- Kansas State University, Division of Biology, 6 Ackert Hall, Manhattan, KS 66503, USA
| | - V Trinetta
- Kansas State University, Food Science Institute, 216 Call Hall, Manhattan, KS 66506, USA.
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10
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Tu WC, McManamen AM, Su X, Jeacopello I, Takezawa MG, Hieber DL, Hassan GW, Lee UN, Anana EV, Locknane MP, Stephenson MW, Shinkawa VAM, Wald ER, DeMuri GP, Adams K, Berthier E, Thongpang S, Theberge AB. At-home saliva sampling in healthy adults using CandyCollect, a lollipop-inspired device. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.14.524039. [PMID: 36711895 PMCID: PMC9882111 DOI: 10.1101/2023.01.14.524039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Respiratory infections are common in children, and there is a need for user-friendly collection methods. Here, we performed the first human subjects study using the CandyCollect device, a lollipop inspired saliva collection device. 1 We showed the CandyCollect device can be used to collect salivary bacteria from healthy adults using Streptococcus mutans and Staphylococcus aureus as proof-of-concept commensal bacteria. We enrolled healthy adults in a nationwide (USA) remote study in which participants were sent study packages containing CandyCollect devices and traditional commercially available oral swabs and spit tubes. Participants sampled themselves at home, completed usability and user preference surveys, and mailed the samples back to our laboratory for analysis by qPCR. Our results showed that for participants in which a given bacterium ( S. mutans or S. aureus ) was detected in one or both of the commercially available methods (oral swab and/or spit tubes), CandyCollect devices had a 100% concordance with the positive result (n=14 participants). Furthermore, the CandyCollect device was ranked the highest preference sampling method among the three sampling methods by 26 participants surveyed (combining survey results across two enrollment groups). We also showed that the CandyCollect device has a shelf life of up to 1 year at room temperature, a storage period that is convenient for clinics or patients to keep the CandyCollect device and use it any time. Taken together, we have demonstrated that the CandyCollect is a user-friendly saliva collection tool that has the potential to be incorporated into diagnostic assays in clinic visits and telemedicine. For Table of Contents Only
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11
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Vieira A, Rodríguez-Lorenzo L, Leonor IB, Reis RL, Espiña B, Dos Santos MB. Innovative Antibacterial, Photocatalytic, Titanium Dioxide Microstructured Surfaces Based on Bacterial Adhesion Enhancement. ACS APPLIED BIO MATERIALS 2023; 6:754-764. [PMID: 36696391 DOI: 10.1021/acsabm.2c00956] [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: 01/26/2023]
Abstract
Bacterial colonization and biofilm formation are found on nearly all wet surfaces, representing a serious problem for both human healthcare and industrial applications, where traditional treatments may not be effective. Herein, we describe a synergistic approach for improving the performance of antibacterial surfaces based on microstructured surfaces that embed titanium dioxide nanoparticles (TiO2 NPs). The surfaces were designed to enhance bacteria entrapment, facilitating their subsequent eradication by a combination of UVC disinfection and TiO2 NPs photocatalysis. The efficacy of the engineered TiO2-modified microtopographic surfaces was evaluated using three different designs, and it was found that S2-lozenge and S3-square patterns had a higher concentration of trapped bacteria, with increases of 70 and 76%, respectively, compared to flat surfaces. Importantly, these surfaces showed a significant reduction (99%) of viable bacteria after just 30 min of irradiation with UVC 254 nm light at low intensity, being sixfold more effective than flat surfaces. Overall, our results showed that the synergistic effect of combining microstructured capturing surfaces with the chemical functionality of TiO2 NPs paves the way for developing innovative and efficient antibacterial surfaces with numerous potential applications in the healthcare and biotechnology market.
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Affiliation(s)
- Ana Vieira
- INL─International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, Braga4715-330, Portugal
| | - Laura Rodríguez-Lorenzo
- INL─International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, Braga4715-330, Portugal
| | - Isabel B Leonor
- 3B's Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães4805-017, Barco, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães4805-017, Portugal
| | - Rui L Reis
- 3B's Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães4805-017, Barco, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães4805-017, Portugal
| | - Begoña Espiña
- INL─International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, Braga4715-330, Portugal
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12
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Lee UN, Su X, Hieber DL, Tu WC, McManamen AM, Takezawa MG, Hassan GW, Chan TC, Adams KN, Wald ER, DeMuri GP, Berthier E, Theberge AB, Thongpang S. CandyCollect: at-home saliva sampling for capture of respiratory pathogens. LAB ON A CHIP 2022; 22:3555-3564. [PMID: 35983761 PMCID: PMC9931141 DOI: 10.1039/d1lc01132d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Streptococcus pyogenes is a major human-specific bacterial pathogen and a common cause of a wide range of symptoms from mild infection such as pharyngitis (commonly called strep throat) to life-threatening invasive infection and post-infectious sequelae. Traditional methods for diagnosis include collecting a sample using a pharyngeal swab, which can cause discomfort and even discourage adults and children from seeking proper testing and treatment in the clinic. Saliva samples are an alternative to pharyngeal swabs. To improve the testing experience for strep throat, we developed a novel lollipop-inspired sampling platform (called CandyCollect) to capture bacteria in saliva. The device can be used in clinics or in the home and shipped back to a lab for analysis, integrating with telemedicine. CandyCollect is designed to capture bacteria on an oxygen plasma treated polystyrene surface embedded with flavoring substances to enhance the experience for children and inform the required time to complete the sampling process. In addition, the open channel structure prevents the tongue from scraping and removing the captured bacteria. The flavoring substances did not affect bacterial capture and the device has a shelf life of at least 2 months (with experiments ongoing to extend the shelf life). We performed a usability study with 17 participants who provided feedback on the device design and the dissolving time of the candy. This technology and advanced processing techniques, including polymerase chain reaction (PCR), will enable user-friendly and effective diagnosis of streptococcal pharyngitis.
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Affiliation(s)
- Ulri N Lee
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Xiaojing Su
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Damielle L Hieber
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Wan-Chen Tu
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Anika M McManamen
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Meg G Takezawa
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Grant W Hassan
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Tung Ching Chan
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Karen N Adams
- Institute of Translational Health Sciences, School of Medicine, University of Washington, Seattle, WA, USA
| | - Ellen R Wald
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Gregory P DeMuri
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Erwin Berthier
- Department of Chemistry, University of Washington, Seattle, WA, USA.
| | - Ashleigh B Theberge
- Department of Chemistry, University of Washington, Seattle, WA, USA.
- Department of Urology, School of Medicine, University of Washington, Seattle, WA, USA
| | - Sanitta Thongpang
- Department of Chemistry, University of Washington, Seattle, WA, USA.
- Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakorn Pathom, Thailand
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13
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Choudhury M, Bindra HS, Singh K, Singh AK, Nayak R. Antimicrobial polymeric composites in consumer goods and healthcare sector: A healthier way to prevent infection. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5660] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mousam Choudhury
- Amity Institute of Nanotechnology Amity University Uttar Pradesh Noida India
| | | | - Karishma Singh
- Amity Institute of Nanotechnology Amity University Uttar Pradesh Noida India
| | - Alok Kumar Singh
- School of Biotechnology Sher‐e‐Kashmir University of Agricultural Science and Technology of Jammu Jammu and Kashmir India
| | - Ranu Nayak
- Amity Institute of Nanotechnology Amity University Uttar Pradesh Noida India
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14
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Periodontal Pathogen Adhesion, Cytotoxicity, and Surface Free Energy of Different Materials for an Implant Prosthesis Screw Access Hole. Medicina (B Aires) 2022; 58:medicina58020329. [PMID: 35208651 PMCID: PMC8879256 DOI: 10.3390/medicina58020329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 11/17/2022] Open
Abstract
Background and Objectives: Oral implant restorations are an excellent treatment option for edentulous patients; however, periodontopathogenic bacteria have been found in the microgaps between implant−abutment junctions. Implant designs to limit the microgaps have been extensively studied. However, studies have shown microgaps continue to exist, allowing for the leakage of bacteria into the implant system. Screw access hole materials are used to fill the access hole void. The use of materials with beneficial properties could provide bacterial leakage prevention. The aim of this study was to examine the surface free energy, cytotoxicity, and bacterial adhesion of selected screw access hole materials such as cotton, polytetrafluoroethylene (PTFE) tape, paraffin wax−polyolefin thermoplastic (PF), paraffin wax (Wax), gutta-percha (GP), and caviton EX (CE). Materials and Methods: A sessile drop test was performed to observe the contact angle and calculate the surface free energy of each material in order to determine the level of hydrophobicity. Cytotoxicity was examined in a mouse gingival epithelial cell line for day 1 and day 3. Bacterial adhesion was tested with Porphyromonas gingivalis, Fusobacterium nucleatum, and Aggregatibacter actinomycetemcomitans. Results: PTFE, PF, and wax presented low surface free energies of 19.34, 23.041, and 24.883 mN.m-1, respectively. No cytotoxicity was observed, except for GP and CE. Concurrently, the bacterial adhesion was also the lowest in PTFE and PF. Conclusion: Within the limits of this study, PTFE and PF showed an excellent biocompatibility with few bacterial adhesions. These materials could be potential screw access hole materials in clinical settings.
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15
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Levana O, Hong S, Kim SH, Jeong JH, Hur SS, Lee JW, Kwon KS, Hwang Y. A Novel Strategy for Creating an Antibacterial Surface Using a Highly Efficient Electrospray-Based Method for Silica Deposition. Int J Mol Sci 2022; 23:513. [PMID: 35008939 PMCID: PMC8745460 DOI: 10.3390/ijms23010513] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/28/2021] [Accepted: 12/31/2021] [Indexed: 12/17/2022] Open
Abstract
Adhesion of bacteria on biomedical implant surfaces is a prerequisite for biofilm formation, which may increase the chances of infection and chronic inflammation. In this study, we employed a novel electrospray-based technique to develop an antibacterial surface by efficiently depositing silica homogeneously onto polyethylene terephthalate (PET) film to achieve hydrophobic and anti-adhesive properties. We evaluated its potential application in inhibiting bacterial adhesion using both Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) bacteria. These silica-deposited PET surfaces could provide hydrophobic surfaces with a water contact angle greater than 120° as well as increased surface roughness (root mean square roughness value of 82.50 ± 16.22 nm and average roughness value of 65.15 ± 15.26 nm) that could significantly reduce bacterial adhesion by approximately 66.30% and 64.09% for E. coli and S. aureus, respectively, compared with those on plain PET surfaces. Furthermore, we observed that silica-deposited PET surfaces showed no detrimental effects on cell viability in human dermal fibroblasts, as confirmed by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5 diphenyl tetrazolium bromide and live/dead assays. Taken together, such approaches that are easy to synthesize, cost effective, and efficient, and could provide innovative strategies for preventing bacterial adhesion on biomedical implant surfaces in the clinical setting.
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Affiliation(s)
- Odelia Levana
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheonan-si 31151, Chungnam-do, Korea; (O.L.); (J.H.J.); (S.S.H.)
- Department of Integrated Biomedical Science, Soonchunhyang University, Asan-si 31538, Chungnam-do, Korea
| | - Soonkook Hong
- Department of Mechanical and Naval Architectural Engineering, Republic of Korea Naval Academy, Changwon-si 51704, Kyungsangnam-do, Korea;
| | - Se Hyun Kim
- Department of Electronic Materials, Devices and Equipment Engineering, Soonchunhyang University, Asan-si 31538, Chungnam-do, Korea;
| | - Ji Hoon Jeong
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheonan-si 31151, Chungnam-do, Korea; (O.L.); (J.H.J.); (S.S.H.)
- Department of Integrated Biomedical Science, Soonchunhyang University, Asan-si 31538, Chungnam-do, Korea
| | - Sung Sik Hur
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheonan-si 31151, Chungnam-do, Korea; (O.L.); (J.H.J.); (S.S.H.)
| | - Jin Woo Lee
- Department of Molecular Medicine, Gachon University College of Medicine, Incheon 21936, Korea;
| | - Kye-Si Kwon
- Department of Electronic Materials, Devices and Equipment Engineering, Soonchunhyang University, Asan-si 31538, Chungnam-do, Korea;
- Department of Mechanical Engineering, Soonchunhyang University, Asan-si 31538, Chungnam-do, Korea
| | - Yongsung Hwang
- Soonchunhyang Institute of Medi-Bio Science (SIMS), Soonchunhyang University, Cheonan-si 31151, Chungnam-do, Korea; (O.L.); (J.H.J.); (S.S.H.)
- Department of Integrated Biomedical Science, Soonchunhyang University, Asan-si 31538, Chungnam-do, Korea
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16
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Lee J, Jung S, Park H, Kim J. Bifunctional ZIF-8 Grown Webs for Advanced Filtration of Particulate and Gaseous Matters: Effect of Charging Process on the Electrostatic Capture of Nanoparticles and Sulfur Dioxide. ACS APPLIED MATERIALS & INTERFACES 2021; 13:50401-50410. [PMID: 34637264 DOI: 10.1021/acsami.1c15734] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal-organic framework (MOF), an emerging class of porous hybrid inorganic-organic crystals, has been applied for various environmental remediation strategies including liquid and air filtration. In this study, the role of the zeolite imidazole framework-8 (ZIF-8) was explored on the charge trapping ability and its contribution to capturing the targeted pollutants of NaCl nanoparticles and SO2 gas. Poly(lactic acid) fibers with controlled surface pores were electrospun using water vapor-induced phase separation, and the fiber surface was uniformly coated with ZIF-8 crystals via an in situ growth method. As a novel process approach, the corona charging process was applied to the ZIF-8 grown webs. The ZIF-8 promoted the charge trapping in the corona process, and the charged ZIF-8 web showed a significantly improved electrostatic filtration efficiency. Also, the charged ZIF-8 web showed an enhanced SO2 capture ability, both in the static and dynamic air flow states, demonstrating the applicability as a bifunctional filter for both particulate and gaseous matters. The approach of this study is novel in that both particulate and gas capture capabilities were associated with the charge trapping ability of ZIF-8, implementing the corona charging process to the ZIF-8 webs.
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Affiliation(s)
- Jinwook Lee
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Seojin Jung
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Hanjou Park
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Jooyoun Kim
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
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17
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Abstract
Over the last two decades, significant advances have been made in developing disposable baby wet wipes. Wet wipes consist of two main components: nonwoven fabric and liquid. Being more than 90% water, wet wipes are more susceptible to microbial growth than typical personal care products; hence, high concentrations of preservative compounds are often used to ensure extended protection against contamination. However, there is an obvious tendency to minimize the concentration of irritating actives. Baby wet wipes should contain particularly mild surfactants, well-tolerated preservatives, and a buffer system maintaining the formulation pH at a suitable level for the infant’s skin. Efforts have been centered on removing ingredients with irritation potential, such as phenoxyethanol. In addition, a move towards more natural fabrics is occurring. However, these modifications provoke new challenges in preserving the final products. The nature and composition of the fiber can influence the interactions between the preservative and the wipe, subsequently affecting the performance of the preservative system. In this study, we analyzed the causes of the challenge in preserving wet wipes. We found that fabrics containing natural fibers are the main source of contamination, promoting the generation of biofilms on their surfaces. Moreover, the hydrophilic–lipophilic balance (HLB) was utilized to rationalize the physicochemical interactions between the fabric and the preservatives.
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