1
|
Lee YJ, Ajiteru O, Lee JS, Lee OJ, Choi KY, Kim SH, Park CH. Highly conductive, stretchable, and biocompatible graphene oxide biocomposite hydrogel for advanced tissue engineering. Biofabrication 2024; 16:045032. [PMID: 39116889 DOI: 10.1088/1758-5090/ad6cf7] [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: 05/05/2024] [Accepted: 08/08/2024] [Indexed: 08/10/2024]
Abstract
The importance of hydrogels in tissue engineering cannot be overemphasized due to their resemblance to the native extracellular matrix. However, natural hydrogels with satisfactory biocompatibility exhibit poor mechanical behavior, which hampers their application in stress-bearing soft tissue engineering. Here, we describe the fabrication of a double methacrylated gelatin bioink covalently linked to graphene oxide (GO) via a zero-length crosslinker, digitally light-processed (DLP) printable into 3D complex structures with high fidelity. The resultant natural hydrogel (GelGOMA) exhibits a conductivity of 15.0 S m-1as a result of the delocalization of theπ-orbital from the covalently linked GO. Furthermore, the hydrogel shows a compressive strength of 1.6 MPa, and a 2.0 mm thick GelGOMA can withstand a 1.0 kg ms-1momentum. The printability and mechanical strengths of GelGOMAs were demonstrated by printing a fish heart with a functional fluid pumping mechanism and tricuspid valves. Its biocompatibility, electroconductivity, and physiological relevance enhanced the proliferation and differentiation of myoblasts and neuroblasts and the contraction of human-induced pluripotent stem cell-derived cardiomyocytes. GelGOMA demonstrates the potential for the tissue engineering of functional hearts and wearable electronic devices.
Collapse
Affiliation(s)
- Young Jin Lee
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Olatunji Ajiteru
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
- CURE 3D, Department of Cardiac Surgery, University Hospital Düsseldorf, Düsseldorf, Nordrhein-Westfalen 40225, Germany
| | - Ji Seung Lee
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Ok Joo Lee
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Kyu Young Choi
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Hallym University College of Medicine, Kangnam, Seoul 07441, Republic of Korea
| | - Soon Hee Kim
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Chan Hum Park
- Nano-Bio Regenerative Medical Institute (NBRM), Hallym University College of Medicine, Chuncheon, Gangwon-do 24252, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, Chuncheon 24253, Republic of Korea
| |
Collapse
|
2
|
Ahmed J, Gultekinoglu M, Edirisinghe M. Recent developments in the use of centrifugal spinning and pressurized gyration for biomedical applications. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2024; 16:e1916. [PMID: 37553260 DOI: 10.1002/wnan.1916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 06/23/2023] [Accepted: 07/06/2023] [Indexed: 08/10/2023]
Abstract
Centrifugal spinning is a technology used to generate small diameter fibers and has been extensively studied for its vast applications in biomedical engineering. Centrifugal spinning is known for its rapid production rate and has inspired the creation of other technologies which leverage the high-speed rotation, namely Pressurized Gyration. Pressurized gyration incorporates a unique applied gas pressure which serves to provide additional control over the fiber production process. The resulting fibers are uniquely suitable for a range of healthcare-related applications that are thoroughly discussed in this work, which involve scaffolds for tissue engineering, solid dispersions for drug delivery, antimicrobial meshes for filtration and bandage-like fibrous coverings for wound healing. In this review, the notable recent developments in centrifugal spinning and pressurized gyration are presented and how these technologies are being used to further the range of uses of biomaterials engineering, for example the development of core-sheath fabrication techniques for multi-layered fibers and the combination with electrospinning to produce advanced fiber mats. The enormous potential of these technologies and their future advancements highlights how important they are in the biomedical discipline. This article is categorized under: Implantable Materials and Surgical Technologies > Nanotechnology in Tissue Repair and Replacement Nanotechnology Approaches to Biology > Nanoscale Systems in Biology Biology-Inspired Nanomaterials > Lipid-Based Structures.
Collapse
Affiliation(s)
- Jubair Ahmed
- Department of Mechanical Engineering, University College London, London, UK
| | - Merve Gultekinoglu
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, London, UK
| |
Collapse
|
3
|
Ippili S, Jung JS, Thomas AM, Vuong VH, Lee JM, Sha MS, Sadasivuni KK, Jella V, Yoon SG. An Overview of Polymer Composite Films for Antibacterial Display Coatings and Sensor Applications. Polymers (Basel) 2023; 15:3791. [PMID: 37765645 PMCID: PMC10536203 DOI: 10.3390/polym15183791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 09/12/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
The escalating presence of pathogenic microbes has spurred a heightened interest in antimicrobial polymer composites tailored for hygiene applications. These innovative composites ingeniously incorporate potent antimicrobial agents such as metals, metal oxides, and carbon derivatives. This integration equips them with the unique ability to offer robust and persistent protection against a diverse array of pathogens. By effectively countering the challenges posed by microbial contamination, these pioneering composites hold the potential to create safer environments and contribute to the advancement of public health on a substantial scale. This review discusses the recent progress of antibacterial polymer composite films with the inclusion of metals, metal oxides, and carbon derivatives, highlighting their antimicrobial activity against various pathogenic microorganisms. Furthermore, the review summarizes the recent developments in antibacterial polymer composites for display coatings, sensors, and multifunctional applications. Through a comprehensive examination of various research studies, this review aims to provide valuable insights into the design, performance, and real-time applications of these smart antimicrobial coatings for interactive devices, thus enhancing their overall user experience and safety. It concludes with an outlook on the future perspectives and challenges of antimicrobial polymer composites and their potential applications across diverse fields.
Collapse
Affiliation(s)
- Swathi Ippili
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| | - Jang-Su Jung
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| | - Alphi Maria Thomas
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| | - Van-Hoang Vuong
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| | - Jeong-Min Lee
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| | - Mizaj Shabil Sha
- Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar; (M.S.S.); (K.K.S.)
| | - Kishor Kumar Sadasivuni
- Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar; (M.S.S.); (K.K.S.)
- Department of Mechanical and Industrial Engineering, Qatar University, Doha P.O. Box 2713, Qatar
| | - Venkatraju Jella
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| | - Soon-Gil Yoon
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; (J.-S.J.); (A.M.T.); (V.-H.V.); (J.-M.L.)
| |
Collapse
|
4
|
Gungordu Er S, Edirisinghe M, Tabish TA. Graphene-Based Nanocomposites as Antibacterial, Antiviral and Antifungal Agents. Adv Healthc Mater 2023; 12:e2201523. [PMID: 36511355 DOI: 10.1002/adhm.202201523] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 09/08/2022] [Indexed: 12/15/2022]
Abstract
Over the past decade, there have been many interesting studies in the scientific literature about the interaction of graphene-based polymeric nanocomposites with microorganisms to tackle antimicrobial resistance. These studies have reported variable intensities of biocompatibility and selectivity for the nanocomposites toward a specific strain, but it is widely believed that graphene nanocomposites have antibacterial, antiviral, and antifungal activities. Such antibacterial activity is due to several mechanisms by which graphene nanocomposites can act on cells including stimulating oxidative stress; disrupting membranes due to sharp edges; greatly changing core structure mechanical strength and coarseness. However, the underlying mechanisms of graphene nanocomposites as antiviral and antifungal agents remain relatively scarce. In this review, recent advances in the synthesis, functional tailoring, and antibacterial, antiviral, and antifungal applications of graphene nanocomposites are summarized. The synthesis of graphene materials and graphene-based polymeric nanocomposites with techniques such as pressurized gyration, electrospinning, chemical vapor deposition, and layer-by-layer self-assembly is first introduced. Then, the antimicrobial mechanisms of graphene membranes are presented and demonstrated typical in vitro and in vivo studies on the use of graphene nanocomposites for antibacterial, antiviral, and antifungal applications. Finally, the review describes the biosafety, current limitations, and potential of antimicrobial graphene-based nanocomposites.
Collapse
Affiliation(s)
- Seda Gungordu Er
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Tanveer A Tabish
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.,Radcliffe Department of Medicine, University of Oxford, Old Road, Oxford, OX3 7BN, UK.,Department of Engineering Science, University of Oxford, Begbroke Science Park, Oxford, OX5 1PF, UK
| |
Collapse
|
5
|
Matharu RK, Ahmed J, Seo J, Karu K, Golshan MA, Edirisinghe M, Ciric L. Antibacterial Properties of Honey Nanocomposite Fibrous Meshes. Polymers (Basel) 2022; 14:polym14235155. [PMID: 36501550 PMCID: PMC9740266 DOI: 10.3390/polym14235155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 10/25/2022] [Accepted: 11/21/2022] [Indexed: 11/30/2022] Open
Abstract
Natural substances are increasingly being developed for use in health-related applications. Honey has attracted significant interest, not only for its physical and chemical properties, but also for its antibacterial activity. For the first time, suspensions of Black Forest honeydew honey and manuka honey UMF 20+ were examined for their antibacterial properties against Escherichia coli and Staphylococcus epidermidis using flow cytometry. The inhibitory effect of honey on bacterial growth was evident at concentrations of 10, 20 and 30 v/v%. The minimum inhibitory effects of both honey types against each bacterium were also investigated and reported. Electrospray ionisation (ESI) mass spectrometry was performed on both Black Forest honeydew honey and manuka honey UMF 20+. Manuka honey had a gluconic concentration of 2519 mg/kg, whilst Black Forest honeydew honey had a concentration of 2195 mg/kg. Manuka honey demonstrated the strongest potency when compared to Black Forest honeydew honey; therefore, it was incorporated into nanofiber scaffolds using pressurised gyration and 10, 20 and 30 v/v% manuka honey-polycaprolactone solutions. Composite fibres were analysed for their morphology and topography using scanning electron microscopy. The average fibre diameter of the manuka honey-polycaprolactone scaffolds was found to range from 437 to 815 nm. The antibacterial activity of the 30 v/v% scaffolds was studied using S. epidermidis. Strong antibacterial activity was observed with a bacterial reduction rate of over 90%. The results show that honey composite fibres formed using pressurised gyration can be considered a natural therapeutic agent for various medicinal purposes, including wound-healing applications.
Collapse
Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK
- Correspondence:
| | - Jubair Ahmed
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Jegak Seo
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK
| | - Kersti Karu
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Mitra Ashrafi Golshan
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Lena Ciric
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK
| |
Collapse
|
6
|
Gungordu Er S, Tabish TA, Edirisinghe M, Matharu RK. Antiviral properties of porous graphene, graphene oxide and graphene foam ultrafine fibers against Phi6 bacteriophage. Front Med (Lausanne) 2022; 9:1032899. [PMID: 36507513 PMCID: PMC9730705 DOI: 10.3389/fmed.2022.1032899] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/07/2022] [Indexed: 11/25/2022] Open
Abstract
As the world has experienced in the Coronavirus Disease 2019 pandemic, viral infections have devastating effects on public health. Personal protective equipment with high antiviral features has become popular among healthcare staff, researchers, immunocompromised people and more to minimize this effect. Graphene and its derivatives have been included in many antimicrobial studies due to their exceptional physicochemical properties. However, scientific studies on antiviral graphene are much more limited than antibacterial and antifungal studies. The aim of this study was to produce nanocomposite fibers with high antiviral properties that can be used for personal protective equipment and biomedical devices. In this work, 10 wt% polycaprolactone-based fibers were prepared with different concentrations (0.1, 0.5, 1, 2, 4 w/w%) of porous graphene, graphene oxide and graphene foam in acetone by using electrospinning. SEM, FTIR and XRD characterizations were applied to understand the structure of fibers and the presence of materials. According to SEM results, the mean diameters of the porous graphene, graphene oxide and graphene foam nanofibers formed were around 390, 470, and 520 nm, respectively. FTIR and XRD characterization results for 2 w/w% concentration nanofibers demonstrated the presence of graphene oxide, porous graphene and graphene foam nanomaterials in the fiber. The antiviral properties of the formed fibers were tested against Pseudomonas phage Phi6. According to the results, concentration-dependent antiviral activity was observed, and the strongest viral inhibition graphene oxide-loaded nanofibers were 33.08 ± 1.21% at the end of 24 h.
Collapse
Affiliation(s)
- Seda Gungordu Er
- Department of Mechanical Engineering, University College London, London, United Kingdom
| | - Tanveer A. Tabish
- Department of Mechanical Engineering, University College London, London, United Kingdom
- Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
- Department of Engineering Science, University of Oxford Begbroke Science Park, Oxford, United Kingdom
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, London, United Kingdom
| | - Rupy Kaur Matharu
- Department of Civil, Environmental and Geomatic Engineering, University College London, London, United Kingdom
| |
Collapse
|
7
|
Adekoya O, Adekoya GJ, Sadiku RE, Hamam Y, Ray SS. Density Functional Theory Interaction Study of a Polyethylene Glycol-Based Nanocomposite with Cephalexin Drug for the Elimination of Wound Infection. ACS OMEGA 2022; 7:33808-33820. [PMID: 36188269 PMCID: PMC9520710 DOI: 10.1021/acsomega.2c02347] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 08/26/2022] [Indexed: 05/13/2023]
Abstract
In this paper, density functional theory (DFT) simulations are used to evaluate the possible use of a graphene oxide-based poly(ethylene glycol) (GO/PEG) nanocomposite as a drug delivery substrate for cephalexin (CEX), an antibiotic drug employed to treat wound infection. First, the stable configuration of the PEGylated system was generated with a binding energy of -25.67 kcal/mol at 1.62 Å through Monte Carlo simulation and DFT calculation for a favorable adsorption site. The most stable configuration shows that PEG interacts with GO through hydrogen bonding of the oxygen atom on the hydroxyl group of PEG with the hydrogen atom of the carboxylic group on GO. Similarly, for the interaction of the CEX drug with the GO/PEG nanocomposite excipient system, the adsorption energies are computed after determining the optimal and thermodynamically favorable configuration. The nitrogen atom from the amine group of the drug binds with a hydrogen atom from the carboxylic group of the GO/PEG nanocomposite at 1.75 Å, with an adsorption energy of -36.17 kcal/mol, in the most stable drug-excipient system. Drug release for tissue regeneration at the predicted target cell is more rapid in moist conditions than in the gas phase. The solubility of the suggested drug in the aqueous media around the open wound is shown by the magnitude of the predicted solvation energy. The findings from this study theoretically validate the potential use of a GO/PEG nanocomposite for wound treatment application as a drug carrier for sustained release of the CEX drug.
Collapse
Affiliation(s)
- Oluwasegun
Chijioke Adekoya
- Institute
of Nanoengineering Research (INER), Department of Chemical, Metallurgical
and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
| | - Gbolahan Joseph Adekoya
- Institute
of Nanoengineering Research (INER), Department of Chemical, Metallurgical
and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
| | - Rotimi Emmanuel Sadiku
- Institute
of Nanoengineering Research (INER), Department of Chemical, Metallurgical
and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 0001, South Africa
| | - Yskandar Hamam
- Department
of Electrical Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria 001, South Africa
- École
Supérieure d’Ingénieurs en Électrotechnique
et Électronique, Cité Descartes, 2 Boulevard Blaise Pascal, Noisy-le-Grand, Paris 93160, France
| | - Suprakas Sinha Ray
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornforntein, Johannesburg 2028, South
Africa
- , ,
| |
Collapse
|
8
|
The Effect of Solvent and Pressure on Polycaprolactone Solutions for Particle and Fibre Formation. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
9
|
Wong LY, Lau SY, Pan S, Lam MK. 3D graphene-based adsorbents: Synthesis, proportional analysis and potential applications in oil elimination. CHEMOSPHERE 2022; 287:132129. [PMID: 34509009 DOI: 10.1016/j.chemosphere.2021.132129] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/24/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
The suitability and efficacy of three-dimensional (3D) graphene, including its derivatives, have garnered widespread attention towards the development of novel, sustainable materials with ecological amenability. This is especially relevant towards its utilization as adsorbents of wastewater contaminants, such as heavy metals, dyes, and oil, which could be majorly attributed to its noteworthy physicochemical features, particularly elevated chemical and mechanical robustness, advanced permeability, as well as large specific surface area. In this review, we emphasize on the adsorptive elimination of oil particles from contaminated water. Specifically, we assess and collate recent literature on the conceptualization and designing stages of 3D graphene-based adsorbents (3DGBAs) towards oil adsorption, including their applications in either batch or continuous modes. In addition, we analytically evaluate the adsorption mechanism, including sorption sites, physical properties, surface chemistry of 3DGBA and interactions between the adsorbent and adsorbate involving the adsorptive removal of oil, as well as numerous effects of adsorption conditions on the adsorption performance, i.e. pH, temperature, initial concentration of oil contaminants and adsorbent dosage. Furthermore, we focus on the equilibrium isotherms and kinetic studies, in order to comprehend the oil elimination procedures. Lastly, we designate encouraging avenues and recommendations for a perpetual research thrust, and outline the associated future prospects and perspectives.
Collapse
Affiliation(s)
- Lee Yi Wong
- Department of Chemical Engineering, Curtin University, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Sie Yon Lau
- Department of Chemical Engineering, Curtin University, CDT 250, 98009, Miri, Sarawak, Malaysia.
| | - Sharadwata Pan
- TUM School of Life Sciences, Technical University of Munich, Freising, 85354, Germany
| | - Man Kee Lam
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak Darul Ridzuan, Malaysia
| |
Collapse
|
10
|
Matharu RK, Cheong YK, Ren G, Edirisinghe M, Ciric L. Exploiting the antiviral potential of intermetallic nanoparticles. EMERGENT MATERIALS 2021; 5:1251-1260. [PMID: 34778706 PMCID: PMC8577177 DOI: 10.1007/s42247-021-00306-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Viral pandemic outbreaks cause a significant burden on global health as well as healthcare expenditure. The use of antiviral agents not only reduces the spread of viral pathogens but also diminishes the likelihood of them causing infection. The antiviral properties of novel copper-silver and copper-zinc intermetallic nanoparticles against Escherichia coli bacteriophage MS2 (RNA virus) and Escherichia coli bacteriophage T4 (DNA virus) are presented. The intermetallic nanoparticles were spherical in shape and were between 90 and 120 nm. Antiviral activity was assessed at concentrations ranging from 0.05 to 2.0 wt/v% for 3 and 24 h using DNA and RNA virus model organisms. Both types of nanoparticles demonstrated strong potency towards RNA viruses (> 89% viral reduction), whilst copper-silver nanoparticles were slightly more toxic towards DNA viruses when compared to copper-zinc nanoparticles. Both nanoparticles were then incorporated into polymeric fibres (carrier) to investigate their antiviral effectiveness when composited into polymeric matrices. Fibres containing copper-silver nanoparticles exhibited favourable antiviral properties, with a viral reduction of 75% after 3 h of exposure. The excellent antiviral properties of the intermetallic nanoparticles reported in this study against both types of viruses together with their unique material properties can make them significant alternatives to conventional antiviral therapies and decontamination agents.
Collapse
Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE UK
- Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, London, WC1E 6BT UK
| | - Yuen-Ki Cheong
- School of Engineering and Computer Science, University of Hertfordshire, Hatfield, AL10 9AB UK
| | - Guogang Ren
- School of Engineering and Computer Science, University of Hertfordshire, Hatfield, AL10 9AB UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE UK
| | - Lena Ciric
- Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, London, WC1E 6BT UK
| |
Collapse
|
11
|
In-vitro evaluation of electrospun cellulose acetate nanofiber containing Graphene oxide/TiO2/Curcumin for wound healing application. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127166] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
12
|
Co-delivery of norfloxacin and tenoxicam in Ag-TiO 2/poly(lactic acid) nanohybrid. Int J Biol Macromol 2021; 180:771-781. [PMID: 33705836 DOI: 10.1016/j.ijbiomac.2021.03.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 01/21/2023]
Abstract
A nanohybrid formulation of silver‑titanium dioxide nanoparticles/poly(lactic acid) (Ag-TiO2/PLA) was designed for Norfloxacin/Tenoxicam (NOR/TENO) targeted delivery to maximize the bioavailability and minimize the side effects of the drugs. Ag-TiO2 nanoparticles were prepared via Stober method. NOR, TENO and a mixture of NOR/TENO (NT) were loaded onto Ag-TiO2 nanoparticles and coated by PLA via solution casting. The physical interaction between the drugs and carrier was confirmed by Fourier-transform infrared (FTIR) analysis. X-ray diffraction (XRD) demonstrated that Ag-TiO2 consists of a cubic phase of Ag with two phases of TiO2 (anatase and brookite). Ag nanoparticle fine spots coated with TiO2 were collected to form spheres averaging at 100 nm in size. In-vitro release behavior of drugs was studied at different pH (5.4, 7.4) and the release of drug from NT/Ag-TiO2/PLA was faster at pH 7.4. Gram-positive and Gram-negative bacteria were used to investigate antibacterial properties of the nanohybrid. Cytotoxicity of the nanohybrid using an MTT assay was studied against different tumor and normal cell lines. It was found that NT/Ag-TiO2/PLA has an excellent cytotoxic effect against various bacterial cells and tumor cell lines. In addition, antioxidant properties of the nanohybrids were tested using ABTS method and the nanohybrid showed moderate antioxidant activity.
Collapse
|
13
|
Gankhuyag S, Bae DS, Lee K, Lee S. One-Pot Synthesis of SiO 2@Ag Mesoporous Nanoparticle Coating for Inhibition of Escherichia coli Bacteria on Various Surfaces. NANOMATERIALS 2021; 11:nano11020549. [PMID: 33671645 PMCID: PMC7926691 DOI: 10.3390/nano11020549] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/19/2021] [Accepted: 02/19/2021] [Indexed: 12/25/2022]
Abstract
Silver nanoparticles (Ag NPs) as antibacterial agents are of considerable interest owing to their simplicity, high surface area to volume ratio, and efficient oligodynamic properties. Hence, we investigated the synthesis of silica-supported Ag NPs (SiO2@Ag) as an effective antibacterial agent by using a wet-impregnation method. The formation of SiO2@Ag with Ag NP (5–15 nm diameter) on the silica particle (100–130 nm diameter) was confirmed with transmission electron microscopy (TEM). The study on antibacterial activity was performed in a liquid culture to determine the minimum inhibitory concentration (MIC) against Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) bacteria. Both bacteria are chosen to understand difference in the effect of Ag NPs against Gram-negative (E. coli) and Gram-positive (B. subtilis) bacteria. SiO2@Ag mesoporous nanoparticles had excellent antibacterial activity against E. coli bacteria and fully restricted the bacterial growth when the material concentration was increased up to 1.00 mg/mL. In addition, the obtained material had good adhesion to both steel and polyethylene substrates and exhibited a high inhibition effect against E. coli bacteria.
Collapse
Affiliation(s)
- Sukhbayar Gankhuyag
- Department of Electronic Engineering, Kyung Hee University, Yongin city, Gyeonggi-do 17104, Korea;
| | - Dong Sik Bae
- Department of Convergence Materials Science and Engineering, Changwon National University, Changwon city, Gyeongsangnam-do 51140, Korea;
| | - Kyoung Lee
- Department of Bio Health Science, Changwon National University, Changwon city, Gyeongsangnam-do 51140, Korea;
| | - Seunghyun Lee
- Department of Electronic Engineering, Kyung Hee University, Yongin city, Gyeonggi-do 17104, Korea;
- Correspondence:
| |
Collapse
|
14
|
Ahmed J, Tabish TA, Zhang S, Edirisinghe M. Porous Graphene Composite Polymer Fibres. Polymers (Basel) 2020; 13:E76. [PMID: 33375518 PMCID: PMC7795706 DOI: 10.3390/polym13010076] [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: 11/20/2020] [Revised: 12/13/2020] [Accepted: 12/23/2020] [Indexed: 02/06/2023] Open
Abstract
Since the isolation of graphene, there have been boundless pursuits to exploit the many superior properties that this material possesses; nearing the two-decade mark, progress has been made, but more is yet to be done for it to be truly exploited at a commercial scale. Porous graphene (PG) has recently been explored as a promising membrane material for polymer composite fibres. However, controlling the incorporation of high surface area PG into polymer fibres remain largely unexplored. Additionally, most polymer-graphene composites suffer from low production rates and yields. In this paper, graphene-loaded microfibres, which can be produced at a very high rate and yield have been formed with a carrier polymer, polycaprolactone. For the first time, PG has been incorporated into polymer matrices produced by a high-output manufacturing process and analysed via multiple techniques; scanning electron microscopy (SEM), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Raman spectra showed that single layer graphene structures were achieved, evidence for which was also backed up by the other techniques. Fibres with an average diameter ranging from 3-8 μm were produced with 3-5 wt% PG. Here, we show how PG can be easily processed into polymeric fibres, allowing for widespread use in electrical and ultrafiltration systems.
Collapse
Affiliation(s)
- Jubair Ahmed
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK;
| | - Tanveer A. Tabish
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
- UCL Cancer Institute, University College London, London WC1E 6DD, UK;
| | - Shaowei Zhang
- UCL Cancer Institute, University College London, London WC1E 6DD, UK;
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK;
| |
Collapse
|
15
|
|
16
|
Meconi GM, Zangi R. Adsorption-induced clustering of CO 2 on graphene. Phys Chem Chem Phys 2020; 22:21031-21041. [PMID: 32926038 DOI: 10.1039/d0cp03482g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Utilization of graphene-based materials for selective carbon dioxide capture has been demonstrated recently as a promising technological approach. In this study we report results from density functional theory calculations and molecular dynamics simulations on the adsorption of CO2, N2, and CH4 gases on a graphene sheet. We calculate adsorption isotherms of ternary and binary mixtures of these gases and reproduce the larger selectivity of CO2 to graphene relative to the other two gases. Furthermore it is shown that the confinement to two-dimensions, associated with adsorbing the CO2 gas molecules on the plane of graphene, increases their propensity to form clusters on the surface. Above a critical surface coverage (or partial pressure) of the gas, these CO2-CO2 interactions augment the effective adsorption energy to graphene, and, in part, contribute to the high selectivity of carbon dioxide with respect to nitrogen and methane. The origin of the attractive interaction between the CO2 molecules adsorbed on the surface is of electric quadrupole-quadrupole nature, in which the positively-charged carbon of one molecule interacts with the negatively-charged oxygen of another molecule. The energy of attraction of forming a CO2 dimer is predicted to be around 5-6 kJ mol-1, much higher than the corresponding values calculated for N2 and CH4. We also evaluated the adsorption energies of these gases to a graphene sheet and found that the attractions obtained using the classical force-fields might be over-exaggerated. Nevertheless, even when the magnitudes of these (classical force-field) graphene-gas interactions are scaled-down sufficiently, the tendency of CO2 molecules to cluster on the surface is still observed.
Collapse
Affiliation(s)
- Giulia Magi Meconi
- POLYMAT & Department of Applied Chemistry, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, 20018, San Sebastian, Spain
| | | |
Collapse
|
17
|
Ajiteru O, Sultan MT, Lee YJ, Seo YB, Hong H, Lee JS, Lee H, Suh YJ, Ju HW, Lee OJ, Park HS, Jang M, Kim SH, Park CH. A 3D Printable Electroconductive Biocomposite Bioink Based on Silk Fibroin-Conjugated Graphene Oxide. NANO LETTERS 2020; 20:6873-6883. [PMID: 32794720 DOI: 10.1021/acs.nanolett.0c02986] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Reduced graphene oxide (rGO) has wide application as a nanofiller in the fabrication of electroconductive biocomposites due to its exceptional properties. However, the hydrophobicity and chemical stability of rGO limit its ability to be incorporated into precursor polymers for physical mixing during biocomposite fabrication. Moreover, until now, no suitable rGO-combining biomaterials that are stable, soluble, biocompatible, and 3D printable have been developed. In this study, we fabricated digital light processing (DLP) printable bioink (SGOB1), through covalent reduction of graphene oxide (GO) by glycidyl methacrylated silk fibroin (SB). Compositional analyses showed that SGOB1 contains approximately 8.42% GO in its reduced state. Our results also showed that the rGO content of SGOB1 became more thermally stable and highly soluble. SGOB1 hydrogels demonstrated superior mechanical, electroconductive, and neurogenic properties than (SB). Furthermore, the photocurable bioink supported Neuro2a cell proliferation and viability. Therefore, SGOB1 could be a suitable biocomposite for neural tissue engineering.
Collapse
Affiliation(s)
- Olatunji Ajiteru
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Md Tipu Sultan
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Young Jin Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Ye Been Seo
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Heesun Hong
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Ji Seung Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Hanna Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Ye Ji Suh
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Hyung Woo Ju
- Nano-Bio Regenerative Technology Company Ltd. 56-16, Toegyegondan 1-gil, Chuncheon, Gangwon-do 24427, Republic of Korea
| | - Ok Joo Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Hae Sang Park
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Moongyu Jang
- School of Nano Convergence Technology, Hallym University, Chuncheon, Gangwon-do 24252, South Korea
- Nano Convergence Technology Research Center, Hallym University, Chuncheon, Gangwon-do 24252, South Korea
| | - Soon Hee Kim
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Chan Hum Park
- Nano-Bio Regenerative Medical Institute, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Chuncheon, Gangwon-do 24252, Republic of Korea
| |
Collapse
|
18
|
Matharu RK, Porwal H, Chen B, Ciric L, Edirisinghe M. Viral filtration using carbon-based materials. MEDICAL DEVICES & SENSORS 2020; 3:e10107. [PMID: 32838209 PMCID: PMC7323107 DOI: 10.1002/mds3.10107] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 06/06/2020] [Accepted: 11/06/2020] [Indexed: 12/25/2022]
Abstract
Viral infections alone are a significant cause of morbidity and mortality worldwide and have a detrimental impact on global healthcare and socio-economic development. The discovery of novel antiviral treatments has gained tremendous attention and support with the rising number of viral outbreaks. In this work, carbonaceous materials, including graphene nanoplatelets and graphene oxide nanosheets, were investigated for antiviral properties. The materials were characterized using scanning electron microscopy and transmission electron microscopy. Analysis showed the materials to be two-dimensional with lateral dimensions ranging between 1 and 4 µm for graphene oxide and 110 ± 0.11 nm for graphene nanoplatelets. Antiviral properties were assessed against a DNA virus model microorganism at concentrations of 0.5, 1.0 and 2.0 wt/v%. Both carbonaceous nanomaterials exhibited potent antiviral properties and gave rise to a viral reduction of 100% across all concentrations tested. Graphene oxide nanosheets were then incorporated into polymeric fibres, and their antiviral behaviour was examined after 3 and 24 hr. A viral reduction of 39% was observed after 24 hr of exposure. The research presented here showcases, for the first time, the antiviral potential of several carbonaceous nanomaterials, also included in a carrier polymer. These outcomes can be translated and implemented in many fields and devices to prevent viral spread and infection.
Collapse
Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical EngineeringUniversity College LondonLondonUK
- Department of CivilEnvironmental and Geomatic EngineeringUniversity College LondonLondonUK
| | - Harshit Porwal
- School of Engineering and Materials ScienceQueen Mary University of LondonLondonUK
| | - Biqiong Chen
- School of Mechanical and Aerospace EngineeringQueen's University BelfastBelfastUK
| | - Lena Ciric
- Department of CivilEnvironmental and Geomatic EngineeringUniversity College LondonLondonUK
| | - Mohan Edirisinghe
- Department of Mechanical EngineeringUniversity College LondonLondonUK
| |
Collapse
|
19
|
Matharu RK, Tabish TA, Trakoolwilaiwan T, Mansfield J, Moger J, Wu T, Lourenço C, Chen B, Ciric L, Parkin IP, Edirisinghe M. Microstructure and antibacterial efficacy of graphene oxide nanocomposite fibres. J Colloid Interface Sci 2020; 571:239-252. [DOI: 10.1016/j.jcis.2020.03.037] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/08/2020] [Accepted: 03/09/2020] [Indexed: 01/10/2023]
|
20
|
Matharu RK, Ciric L, Ren G, Edirisinghe M. Comparative Study of the Antimicrobial Effects of Tungsten Nanoparticles and Tungsten Nanocomposite Fibres on Hospital Acquired Bacterial and Viral Pathogens. NANOMATERIALS 2020; 10:nano10061017. [PMID: 32466574 PMCID: PMC7352352 DOI: 10.3390/nano10061017] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/17/2020] [Accepted: 05/19/2020] [Indexed: 02/08/2023]
Abstract
A significant proportion of patients acquire hospital associated infections as a result of care within the NHS each year. Numerous antimicrobial strategies, such as antibiotics and surface modifications to medical facilities and instruments, have been devised in an attempt to reduce the incidence of nosocomial infections, but most have been proven unsuccessful and unsustainable due to antibiotic resistance. Therefore, the need to discover novel materials that can combat pathogenic microorganisms is ongoing. Novel technologies, such as the potential use of nanomaterials and nanocomposites, hold promise for reducing these infections in the fight against antimicrobial resistance. In this study, the antimicrobial activity of tungsten, tungsten carbide and tungsten oxide nanoparticles were tested against Escherichia coli, Staphylococcus aureus and bacteriophage T4 (DNA virus). The most potent nanoparticles, tungsten oxide, were incorporated into polymeric fibres using pressurised gyration and characterised using scanning electron microscopy and energy dispersive X-ray spectroscopy. The antimicrobial activity of tungsten oxide/polymer nanocomposite fibres was also studied. The results suggest the materials in this study promote mediation of the inhibition of microbial growth in suspension.
Collapse
Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK;
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK;
| | - Lena Ciric
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK;
| | - Guogang Ren
- School of Engineering and Technology, University of Hertfordshire, Hatfield AL10 9AB, UK;
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK;
- Correspondence:
| |
Collapse
|
21
|
Cobos M, De-La-Pinta I, Quindós G, Fernández MJ, Fernández MD. Graphene Oxide-Silver Nanoparticle Nanohybrids: Synthesis, Characterization, and Antimicrobial Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E376. [PMID: 32098083 PMCID: PMC7075288 DOI: 10.3390/nano10020376] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/17/2020] [Accepted: 02/19/2020] [Indexed: 12/12/2022]
Abstract
Drug resistance of pathogenic microorganisms has become a global public health problem, which has prompted the development of new materials with antimicrobial properties. In this context, antimicrobial nanohybrids are an alternative due to their synergistic properties. In this study, we used an environmentally friendly one-step approach to synthesize graphene oxide (GO) decorated with silver nanoparticles (GO-AgNPs). By this process, spherical AgNPs of average size less than 4 nm homogeneously distributed on the surface of the partially reduced GO can be generated in the absence of any stabilizing agent, only with ascorbic acid (L-AA) as a reducing agent and AgNO3 as a metal precursor. The size of the AgNPs can be controlled by the AgNO3 concentration and temperature. Smaller AgNPs are obtained at lower concentrations of the silver precursor and lower temperatures. The antimicrobial properties of nanohybrids against Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa, Gram-positive Staphylococcus aureus, and the yeast Candida albicans were found to be concentration- and time-dependent. C. albicans and S. aureus showed the highest susceptibility to GO-AgNPs. These nanohybrids can be used as nanofillers in polymer nanocomposites to develop materials with antimicrobial activity for applications in different areas, and another potential application could be cancer therapeutic agents.
Collapse
Affiliation(s)
- Mónica Cobos
- Department of Polymer Science and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), Paseo Manuel Lardizábal 3, 20018 San Sebastián, Spain; (M.C.); (M.J.F.)
| | - Iker De-La-Pinta
- Department of Immunology, Microbiology and Parasitology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa 48940, Spain; (I.D.-L.-P.); (G.Q.)
| | - Guillermo Quindós
- Department of Immunology, Microbiology and Parasitology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa 48940, Spain; (I.D.-L.-P.); (G.Q.)
| | - M. Jesús Fernández
- Department of Polymer Science and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), Paseo Manuel Lardizábal 3, 20018 San Sebastián, Spain; (M.C.); (M.J.F.)
| | - M. Dolores Fernández
- Department of Polymer Science and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), Paseo Manuel Lardizábal 3, 20018 San Sebastián, Spain; (M.C.); (M.J.F.)
| |
Collapse
|
22
|
Hadisi Z, Farokhi M, Bakhsheshi-Rad HR, Jahanshahi M, Hasanpour S, Pagan E, Dolatshahi-Pirouz A, Zhang YS, Kundu SC, Akbari M. Hyaluronic Acid (HA)-Based Silk Fibroin/Zinc Oxide Core-Shell Electrospun Dressing for Burn Wound Management. Macromol Biosci 2020; 20:e1900328. [PMID: 32077252 DOI: 10.1002/mabi.201900328] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 01/11/2020] [Indexed: 01/17/2023]
Abstract
Burn injuries represent a major life-threatening event that impacts the quality of life of patients, and places enormous demands on the global healthcare systems. This study introduces the fabrication and characterization of a novel wound dressing made of core-shell hyaluronic acid-silk fibroin/zinc oxide (ZO) nanofibers for treatment of burn injuries. The core-shell configuration enables loading ZO-an antibacterial agent-in the core of nanofibers, which in return improves the sustained release of the drug and maintains its bioactivity. Successful formation of core-shell nanofibers and loading of zinc oxide are confirmed by transmission electron microscopy, Fourier-transform infrared spectroscopy, and energy dispersive X-ray. The antibacterial activity of the dressings are examined against Escherichia coli and Staphylococcus aureus and it is shown that addition of ZO improves the antibacterial property of the dressing in a dose-dependent fashion. However, in vitro cytotoxicity studies show that high concentration of ZO (>3 wt%) is toxic to the cells. In vivo studies indicate that the wound dressings loaded with ZO (3 wt%) substantially improves the wound healing procedure and significantly reduces the inflammatory response at the wound site. Overall, the dressing introduced herein holds great promise for the management of burn injuries.
Collapse
Affiliation(s)
- Zhina Hadisi
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada.,Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Mehdi Farokhi
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, PO Box 1316943551, Iran
| | - Hamid Reza Bakhsheshi-Rad
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| | - Maryam Jahanshahi
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada.,Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Sadegh Hasanpour
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada.,Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Erik Pagan
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada.,Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Alireza Dolatshahi-Pirouz
- Radboud university medical center, Radboud Institute for Molecular Life Sciences, Department of Dentistry-Regenerative Biomaterials, Philips van Leydenlaan 25, 6525EX, Nijmegen, The Netherlands.,Department of Health Technology, Institute of Biotherapeutic Engineering and Drug Targeting, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, Kgs Lyngby, 2800, Denmark
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 65 Landsdowne St, Cambridge, MA, 02139, USA
| | - Subhas C Kundu
- 3Bs Research Group, I3Bs-Institute on Biomaterials, biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Guimaraes, 4805-017, Portugal
| | - Mohsen Akbari
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada.,Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC, V8P 5C2, Canada
| |
Collapse
|
23
|
Tiwari AK, Gupta MK, Pandey G, Narayan RJ, Pandey PC. Molecular weight of polyethylenimine-dependent transfusion and selective antimicrobial activity of functional silver nanoparticles. JOURNAL OF MATERIALS RESEARCH 2020; 35:2405-2415. [PMID: 33424108 PMCID: PMC7776303 DOI: 10.1557/jmr.2020.183] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/29/2020] [Indexed: 05/07/2023]
Abstract
Synthetic cationic polymer-mediated synthesis of silver nanoparticles and selective antimicrobial activity of the same were demonstrated. Polyethyleneimine (PEI)-coated silver nanoparticles showed antimicrobial activity against Acinetobacter baumannii as a function of the polymeric molecular weight (MW) of PEI. Silver nanoparticles were coated with PEI of three different MWs: Ag-NP-1 with PEI exhibiting a MW of 750,000, Ag-NP-2 with PEI exhibiting a MW of 1300, and Ag-NP-3 with PEI exhibiting a MW of 60,000. These nanoparticles showed a particle size distribution of 4-20 nm. The nanoparticles exhibited potent antimicrobial activity against A. baumannii, with the minimum inhibitory concentration of Ag-NP-1, Ag-NP-2, and Ag-NP-3 on the order of 5, 10, and 5 μg/mL, respectively, and minimum bactericidal concentration of Ag-NP-1, Ag-NP-2, and Ag-NP-3 on the order of 10, 20, and 10 μg/mL, respectively. Fluorescence imaging of Ag-NPs revealed selective transfusion of Ag-NPs across the cell membrane as a function of the polymeric MW; differential interaction of the cytoplasmic proteins during antimicrobial activity was observed.
Collapse
Affiliation(s)
- Atul Kumar Tiwari
- Department of Chemistry, Indian Institute of Technology, Varanasi, Uttar Pradesh 221005 India
| | - Munesh Kumar Gupta
- Department of Microbiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005 India
| | - Govind Pandey
- Department of Pediatrics, King George Medical University, Lucknow, Uttar Pradesh 226003 India
| | - Roger J. Narayan
- Department of Biomedical Engineering, North Carolina State University, North Carolina, 27695 USA
| | - Prem C. Pandey
- Department of Chemistry, Indian Institute of Technology, Varanasi, Uttar Pradesh 221005 India
| |
Collapse
|
24
|
Papadopoulou EL, Basnett P, Paul UC, Marras S, Ceseracciu L, Roy I, Athanassiou A. Green Composites of Poly(3-hydroxybutyrate) Containing Graphene Nanoplatelets with Desirable Electrical Conductivity and Oxygen Barrier Properties. ACS OMEGA 2019; 4:19746-19755. [PMID: 31788606 PMCID: PMC6881833 DOI: 10.1021/acsomega.9b02528] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
Poly(3-hydroxybutyrate), a green polymer originating from prokaryotic microbes, has been used to prepare composites with graphene nanoplatelets (GnP) at different concentrations. The films were fabricated by drop-casting and were hot-pressed at a temperature lower than their melting point to provide the molecular chains enough energy to reorientate while avoiding melting and degradation. It was found that hot-pressing increases crystallinity and improves mechanical properties. The Young's modulus increased from 1.2 to 1.6 GPa for the poly(3-hydroxybutyrate) (P(3HB)) films and from 0.5 to 2.2 GPa for the 15 wt % P(3HB)/GnP composites. Electrical resistivity decreases enormously with GnP concentration and hot-pressing, reaching 6 Ω sq-1 for the hot-pressed 30 wt % P(3HB)/GnP composite. Finally, the hot-pressed P(3HB) samples exhibit remarkable oxygen barrier properties, with oxygen permeability reaching 2800 mL μm m-2 day-1, which becomes 895 mL μm m-2 day-1 when 15% GnP is added to the biopolymer matrix, one of the lowest values known for biopolymers and biocomposites. We propose that these biocomposites are used for elastic packaging and electronics.
Collapse
Affiliation(s)
- Evie L. Papadopoulou
- Smart
Materials and Materials Characterization Facility, Istituto
Italiano di Tecnologia, via Morego 30, Genoa 16163, Italy
| | - Pooja Basnett
- Applied
Biotechnology Research Group, School of Life Sciences, College of
Liberal Arts and Sciences, University of
Westminster, London W1W 6UW, U.K.
| | - Uttam C. Paul
- Smart
Materials and Materials Characterization Facility, Istituto
Italiano di Tecnologia, via Morego 30, Genoa 16163, Italy
| | - Sergio Marras
- Smart
Materials and Materials Characterization Facility, Istituto
Italiano di Tecnologia, via Morego 30, Genoa 16163, Italy
| | - Luca Ceseracciu
- Smart
Materials and Materials Characterization Facility, Istituto
Italiano di Tecnologia, via Morego 30, Genoa 16163, Italy
| | - Ipsita Roy
- Applied
Biotechnology Research Group, School of Life Sciences, College of
Liberal Arts and Sciences, University of
Westminster, London W1W 6UW, U.K.
- Department
of Material Science and Engineering, Faculty of Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, U.K.
| | - Athanassia Athanassiou
- Smart
Materials and Materials Characterization Facility, Istituto
Italiano di Tecnologia, via Morego 30, Genoa 16163, Italy
| |
Collapse
|
25
|
Carvalho LDD, Peres BU, Maezono H, Shen Y, Haapasalo M, Jackson J, Carvalho RM, Manso AP. Doxycycline release and antibacterial activity from PMMA/PEO electrospun fiber mats. J Appl Oral Sci 2019; 27:e20180663. [PMID: 31596368 PMCID: PMC6768291 DOI: 10.1590/1678-7757-2018-0663] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 07/20/2019] [Indexed: 11/22/2022] Open
Abstract
Objective: To investigate the use of polymethyl methacrylate (PMMA) electrospun fiber mats containing different amounts of polyethylene oxide (PEO) as a doxycycline delivery system and to test antibacterial activity against an oral pathogen. Methodology: PMMA powders or PEO (mol wt 200 Kd) (10,20,30% w/w/) were dissolved in N, N-dimethylformamide (DMF) to obtain a final polymer concentration of 15% in DMF (w/v). 2% Doxycycline monohydrate was added to the solutions and submitted to vortex mixing. The solution was transferred to a plastic syringe and fit into a nanofiber electrospinning unit. The parameters applied were: voltage at 17.2 kV; distance of 20 cm between the needle tip and the collector plate; target speed at 2 m/min; and transverse speed at 1cm/min. Syringe pump speed was 0.15 mm/min. The drug release analysis was performed by removing aliquots of the drug-containing solution (in PBS) at specific periods. Doxycycline release was quantified using RP-HPLC. Fiber mats from all groups had their antibacterial action tested against S. mutans based on inhibition halos formed around the specimens. The experiments were performed in triplicate. Gravimetric analysis at specific periods was performed to determine any polymer loss. Morphological characterization of the electrospun fibers was completed under an optical microscope followed by SEM analysis. Results: The addition of PEO to the PMMA fibers did not affect the appearance and diameter of fibers. However, increasing the %PEO caused higher doxycycline release in the first 24 h. Fibers containing 30% PEO showed statistically significant higher release when compared with the other groups. Doxycycline released from the fibers containing 20% or 30% of PEO showed effective against S. mutans. Conclusion: The incorporation of PEO at 20% and 30% into PMMA fiber mat resulted in effective drug release systems, with detected antibacterial activity against S. mutans.
Collapse
Affiliation(s)
- Luana Dutra de Carvalho
- The University of British Columbia, Faculty of Dentistry, Department of Oral Biological and Medical Sciences, Vancouver, Canada
| | - Bernardo Urbanetto Peres
- The University of British Columbia, Faculty of Dentistry, Department of Oral Health Sciences, Vancouver, Canada
| | - Hazuki Maezono
- Osaka University Graduate School of Dentistry Department of Restorative Dentistry and Endodontology, Osaka, Japan
| | - Ya Shen
- The University of British Columbia, Faculty of Dentistry, Department of Oral Biological and Medical Sciences, Vancouver, Canada
| | - Markus Haapasalo
- The University of British Columbia, Faculty of Dentistry, Department of Oral Biological and Medical Sciences, Vancouver, Canada
| | - John Jackson
- The University of British Columbia, Faculty of Pharmaceutical Sciences, Vancouver, Canada
| | - Ricardo M Carvalho
- The University of British Columbia, Faculty of Dentistry, Department of Oral Biological and Medical Sciences, Vancouver, Canada
| | - Adriana P Manso
- The University of British Columbia, Faculty of Dentistry, Department of Oral Health Sciences, Vancouver, Canada
| |
Collapse
|
26
|
Liao C, Li Y, Tjong SC. Antibacterial Activities of Aliphatic Polyester Nanocomposites with Silver Nanoparticles and/or Graphene Oxide Sheets. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1102. [PMID: 31374855 PMCID: PMC6724040 DOI: 10.3390/nano9081102] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/21/2019] [Accepted: 07/25/2019] [Indexed: 12/18/2022]
Abstract
Aliphatic polyesters such as poly(lactic acid) (PLA), polycaprolactone (PCL) and poly(lactic-co-glycolic) acid (PLGA) copolymers have been widely used as biomaterials for tissue engineering applications including: bone fixation devices, bone scaffolds, and wound dressings in orthopedics. However, biodegradable aliphatic polyesters are prone to bacterial infections due to the lack of antibacterial moieties in their macromolecular chains. In this respect, silver nanoparticles (AgNPs), graphene oxide (GO) sheets and AgNPs-GO hybrids can be used as reinforcing nanofillers for aliphatic polyesters in forming antimicrobial nanocomposites. However, polymeric matrix materials immobilize nanofillers to a large extent so that they cannot penetrate bacterial membrane into cytoplasm as in the case of colloidal nanoparticles or nanosheets. Accordingly, loaded GO sheets of aliphatic polyester nanocomposites have lost their antibacterial functions such as nanoknife cutting, blanket wrapping and membrane phospholipid extraction. In contrast, AgNPs fillers of polyester nanocomposites can release silver ions for destroying bacterial cells. Thus, AgNPs fillers are more effective than loaded GO sheets of polyester nanocomposiites in inhibiting bacterial infections. Aliphatic polyester nanocomposites with AgNPs and AgNPs-GO fillers are effective to kill multi-drug resistant bacteria that cause medical device-related infections.
Collapse
Affiliation(s)
- Chengzhu Liao
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Yuchao Li
- Department of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Sie Chin Tjong
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China.
| |
Collapse
|
27
|
Fan Z, Di L, Zhang X, Wang H. A Surface Dielectric Barrier Discharge Plasma for Preparing Cotton-Fabric-Supported Silver Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E961. [PMID: 31266152 PMCID: PMC6669525 DOI: 10.3390/nano9070961] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 11/16/2022]
Abstract
Cotton-fabric-supported silver nanoparticles (Ag NPs) have aroused great attention due to their remarkable physical and chemical properties and excellent broad-spectrum antibacterial performance.In this work, a surface dielectric barrier discharge (DBD) plasma method is developed and employed to prepare cotton fabric supported Ag NPs (Ag/cotton) for the first time. UV-Vis and X-ray photoelectron spectroscopy (XPS) results confirm the formation of Ag NPs. TEM images show that the size of Ag NPs is in the range 4.8-5.3 nm. Heat-sensitive cotton fabrics are not destroyed by surface DBD plasma according to FTIR and XRDresults. Wash fastness of the Ag/cotton samples is investigated using ultrasonic treatment for 30 min and it is shown that the Ag NPs possess good adhesion to the cotton fabric according to UV-Vis spectra. Antibacterial activity of the Ag/cotton samples shows that obvious bacteriostasis loops are observed around the samples with the appearance of both Gram-negative bacterium Escherichia coli (E. coli) and Gram-positive bacterium Bacillus subtilis (B. subtilis). The average diameter of the bacteriostasis loops against both E. coli and B. subtilis becomes larger with an increasing silver loading amount.This work provides a universal, fast, simple, and environmentally-friendly cold plasma method for synthesizing Ag NPs on heat-sensitive materials at atmospheric pressure.
Collapse
Affiliation(s)
- Zhiyuan Fan
- College of Physical Science and Technology, Dalian University, Dalian 116622, China
| | - Lanbo Di
- College of Physical Science and Technology, Dalian University, Dalian 116622, China.
| | - Xiuling Zhang
- College of Physical Science and Technology, Dalian University, Dalian 116622, China
| | - Hongyang Wang
- College of Physical Science and Technology, Dalian University, Dalian 116622, China
| |
Collapse
|
28
|
|
29
|
Han S, Sun J, He S, Tang M, Chai R. The application of graphene-based biomaterials in biomedicine. Am J Transl Res 2019; 11:3246-3260. [PMID: 31312342 PMCID: PMC6614642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/16/2019] [Indexed: 06/10/2023]
Abstract
Graphene-based nanocomposites have attracted more and more attention recently in the field of biology and biomedicine. Graphene and its derivatives have been integrated with drugs, nucleic acids, antibodies, and other molecules. And these materials could be use as nanocomposite carriers or scaffold materials taking advantages of their enormous specific surface area, good elasticity and ductility, excellent biocompatibility, and outstanding mechanical strength. In addition, these composites have strong near-infrared absorbance and can act as photothermal agents to kill target cells through physical or chemical mechanisms. Along with significant advances in cell and organ transplantation, many of these materials have been explored in recent years for use in tissue engineering and regenerative medicine. Tissue engineering includes bone, nerve, heart, and muscle tissue engineering based on two-dimensional and three-dimensional graphene-based matrices or scaffolds possessing certain mechanical strengths and electrical conductivities, and the aim is to produce bioactive tissues to replace or repair natural tissue by promoting osteogenic, neuronal, and myogenic differentiation and myocardial cell growth. In this review, the basic properties of graphene-based complexes are systematically described and the biomedical applications of graphene-based materials in vivo and in vitro are summarized. This review first discusses the safety of graphene-based materials in terms of their biocompatibility and toxicity, and then it discusses these materials' applications in biosensing, photothermal therapy, stem cell culture, and tissue engineering. This review therefore provides a comprehensive understanding of graphene and its derivatives and their present and future applications.
Collapse
Affiliation(s)
- Shanying Han
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast UniversityNanjing 210096, China
| | - Jie Sun
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast UniversityNanjing 210096, China
| | - Shuangba He
- Department of Otolaryngology Head and Neck, Nanjing Tongren Hospital, School of Medicine, Southeast UniversityNanjing 211102, China
| | - Mingliang Tang
- MOE Key Laboratory for Developmental Genes and Human Disease, Institute of Life Sciences, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast UniversityNanjing 210096, China
- Co-Innovation Center of Neuroregeneration, Nantong UniversityNantong 226001, China
- Joint Research Institute of Southeast University and Monash UniversitySuzhou 215123, China
| | - Renjie Chai
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast UniversityNanjing 210096, China
- Department of Otolaryngology Head and Neck, Nanjing Tongren Hospital, School of Medicine, Southeast UniversityNanjing 211102, China
- MOE Key Laboratory for Developmental Genes and Human Disease, Institute of Life Sciences, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast UniversityNanjing 210096, China
- Co-Innovation Center of Neuroregeneration, Nantong UniversityNantong 226001, China
- Institute for Stem Cell and Regeneration, Chinese Academy of ScienceBeijing, China
- Beijing Key Laboratory of Neural Regeneration and Repair, Capital Medical UniversityBeijing 100069, China
- Joint Research Institute of Southeast University and Monash UniversitySuzhou 215123, China
| |
Collapse
|
30
|
Lan S, Lu Y, Li C, Zhao S, Liu N, Sheng X. Sesbania Gum-Supported Hydrophilic Electrospun Fibers Containing Nanosilver with Superior Antibacterial Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E592. [PMID: 30974842 PMCID: PMC6523858 DOI: 10.3390/nano9040592] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/04/2019] [Accepted: 04/05/2019] [Indexed: 11/16/2022]
Abstract
In this contribution, we report for the first time on a new strategy for developing sesbania gum-supported hydrophilic fibers containing nanosilver using electrospinning (SG-Ag/PAN electrospun fibers), which gives the fibers superior antibacterial activity. Employing a series of advanced technologies-scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, UV-visible absorption spectroscopy, X-ray photoelectron spectroscopy, and contact angle testing-we characterized the as-synthesized SG-Ag/PAN electrospun fibers in terms of morphology, size, surface state, chemical composition, and hydrophilicity. By adjusting the synthesis conditions, in particular the feed ratio of sesbania gum (SG) and polyacrylonitrile (PAN) to Ag nanoparticles (NPs), we regulated the morphology and size of the as-electrospun fibers. The fibers' antibacterial properties were examined using the colony-counting method with two model bacteria: Escherichia coli (a Gram-negative bacterium) and Staphylococcus aureus (a Gram-positive bacterium). Interestingly, compared to Ag/PAN and SG-PAN electrospun fibers, the final SG-Ag/PAN showed enhanced antibacterial activity towards both of the model bacteria due to the combination of antibacterial Ag NPs and hydrophilic SG, which enabled the fibers to have sufficient contact with the bacteria. We believe this strategy has great potential for applications in antibacterial-related fields.
Collapse
Affiliation(s)
- Shi Lan
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Yaning Lu
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Chun Li
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Shuang Zhao
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Naren Liu
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Xianliang Sheng
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| |
Collapse
|
31
|
Graphene Oxide-Based Targeting of Extracellular Cathepsin D and Cathepsin L As A Novel Anti-Metastatic Enzyme Cancer Therapy. Cancers (Basel) 2019; 11:cancers11030319. [PMID: 30845739 PMCID: PMC6468385 DOI: 10.3390/cancers11030319] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 02/26/2019] [Accepted: 02/27/2019] [Indexed: 12/21/2022] Open
Abstract
Overexpression and secretion of the enzymes cathepsin D (CathD) and cathepsin L (CathL) is associated with metastasis in several human cancers. As a superfamily, extracellularly, these proteins may act within the tumor microenvironment to drive cancer progression, proliferation, invasion and metastasis. Therefore, it is important to discover novel therapeutic treatment strategies to target CathD and CathL and potentially impede metastasis. Graphene oxide (GO) could form the basis of such a strategy by acting as an adsorbent for pro-metastatic enzymes. Here, we have conducted research into the potential of targeted anti-metastatic therapy using GO to adsorb these pro-tumorigenic enzymes. Binding of CathD/L to GO revealed that CathD/L were adsorbed onto the surface of GO through its cationic and hydrophilic residues. This work could provide a roadmap for the rational integration of CathD/L-targeting agents into clinical settings.
Collapse
|
32
|
Ahmed J, Altun E, Aydogdu MO, Gunduz O, Kerai L, Ren G, Edirisinghe M. Anti-fungal bandages containing cinnamon extract. Int Wound J 2019; 16:730-736. [PMID: 30767437 PMCID: PMC6849878 DOI: 10.1111/iwj.13090] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/09/2019] [Accepted: 01/14/2019] [Indexed: 02/04/2023] Open
Abstract
Cinnamon‐containing polycaprolactone (PCL) bandages were produced by pressurised gyration and their anti‐fungal activities against Candida albicans were investigated. It was found that by preparing and spinning polymer solutions of cinnamon with PCL, fibres capable of inhibiting fungal growth could be produced, as observed in disk diffusion tests for anti‐fungal susceptibility. Fascinatingly, compared with raw cinnamon powder, the novel cinnamon‐loaded fibres had outstanding long‐term activity. The results presented here are very promising and may indeed accelerate a new era of using completely natural materials in biomedical applications, especially in wound healing.
Collapse
Affiliation(s)
- Jubair Ahmed
- Department of Mechanical Engineering, University College London, London, UK
| | - Esra Altun
- Department of Metallurgical and Materials Engineering, University of Marmara, Istanbul, Turkey
| | - Mehmet O Aydogdu
- Department of Metallurgical and Materials Engineering, University of Marmara, Istanbul, Turkey
| | - Oguzhan Gunduz
- Department of Metallurgical and Materials Engineering, University of Marmara, Istanbul, Turkey
| | - Laxmi Kerai
- School of Life and Medical Sciences, University of Hertfordshire, Hertfordshire, UK
| | - Guogang Ren
- School of Engineering and Technology, University of Hertfordshire, Hertfordshire, UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, London, UK
| |
Collapse
|
33
|
Aktürk A, Erol Taygun M, Karbancıoğlu Güler F, Goller G, Küçükbayrak S. Fabrication of antibacterial polyvinylalcohol nanocomposite mats with soluble starch coated silver nanoparticles. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.11.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
34
|
Bhusari SA, Sharma V, Bose S, Basu B. HDPE/UHMWPE hybrid nanocomposites with surface functionalized graphene oxide towards improved strength and cytocompatibility. J R Soc Interface 2019; 16:20180273. [PMID: 30958172 PMCID: PMC6364642 DOI: 10.1098/rsif.2018.0273] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 12/20/2018] [Indexed: 12/24/2022] Open
Abstract
High-density polyethylene (HDPE)-based and ultra-high molecular weight polyethylene (UHMWPE)-based composites with carbonaceous reinforcements are being widely investigated for biomedical applications. The enhancement of material properties critically depends on the nature, amount and compatibility of the reinforcement with the polymeric matrix. To this end, this study demonstrates the efficacy of a 'dual' hybrid approach of incorporating modified inorganic nanofiller into an optimized polyethylene blend. In particular, a unique synthesis strategy was adopted to design a covalently bonded maleated polyethylene (mPE) grafted modified graphene oxide (mGO) hybrid nanocomposite. In this scheme, polyethyleneimine (PEI) was initially attached onto GO to synthesize amine functionalized GO (GO-PEI). This is followed by mPE grafting, resulting in mGO. Melt-extrusion together with injection moulding of a polymer mix (60% HDPE-40% UHMWPE) with different proportions (less than or equal to 3 wt%) of surface functionalized GO was conducted to develop nanocomposites of different sizes and shapes. When compared with unreinforced PE blend, the nanocomposites with 1 wt% mGO exhibited an increase in ultimate tensile strength by 120% (up to 65 MPa) and elastic modulus by 40% (up to 908 MPa). The uniform dispersion of modified GO nanofillers, confirmed using X-ray micro-computed tomography and transmission electron microscopy, facilitated effective interfacial adhesion and compatibility with the hybrid polymer matrix. The variation in mechanical properties with GO/mGO addition to PE blend was critically discussed in reference to the structural modification of GO, crystallinity and nature of dispersion of fillers. Importantly, the nanocomposites support the attachment and proliferation of C2C12 murine myoblast cells over 3 days in culture in a statistically insignificant manner with respect to polymer blends without any nanofiller. Taken together, the experimental results suggest that HDPE/UHMWPE/mGO is a promising biomaterial for bone tissue engineering applications.
Collapse
Affiliation(s)
- Shardul Atul Bhusari
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Vidushi Sharma
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Suryasarathi Bose
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Bikramjit Basu
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
- Centre for Biosystems Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
35
|
Chi M, Liu C, Shen J, Dong Z, Yang Z, Wang L. Antibacterial Superabsorbent Polymers from Tara Gum Grafted Poly(Acrylic acid) Embedded Silver Particles. Polymers (Basel) 2018; 10:polym10090945. [PMID: 30960870 PMCID: PMC6404042 DOI: 10.3390/polym10090945] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/22/2018] [Accepted: 08/23/2018] [Indexed: 02/06/2023] Open
Abstract
Tara gum/silver composite superabsorbent polymers were synthesized with tara gum grafted poly(acrylic acid), using K2S2O8 (KPS) as an initiator and N,N′-methylenebisacrylamide (MBA) as a cross-linker. The products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the silver ions were partially reduced to Ag0 and the amorphous nanoparticles containing Ag0 and Ag2O were around 10~50 nm in size The tara gum/silver composite superabsorbent polymers exhibited an interconnected porous structure with strong water absorption capacity. The swelling ratio of each product could reach 473 g/g in distilled water and 62 g/g in 0.9% NaCl solution. The antimicrobial activity of the samples against Staphylococcus aureus and Escherichia coli increased with the addition of AgNO3 from 0 to 125 mg. This work indicates that the developed tara gum/silver composite superabsorbent polymers can be potentially used for biomedical applications.
Collapse
Affiliation(s)
- Mingfang Chi
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Chang Liu
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Jie Shen
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Zhehai Dong
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Zi Yang
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Lijuan Wang
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| |
Collapse
|
36
|
Matharu RK, Ciric L, Edirisinghe M. Nanocomposites: suitable alternatives as antimicrobial agents. NANOTECHNOLOGY 2018; 29:282001. [PMID: 29620531 DOI: 10.1088/1361-6528/aabbff] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The exploration of nanocomposites has gained a strong research following over the last decade. These materials have been heavily exploited in several fields, with applications ranging from biosensors to biomedicine. Among these applications, great advances have been made in the field of microbiology, specifically as antimicrobial agents. This review aims to provide a comprehensive account of various nanocomposites that elucidate promising antimicrobial activity. The composition, physical and chemical properties, as well as the antimicrobial performance of these nanocomposites, are discussed in detail.
Collapse
Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom. Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London, WC1E 6BT, United Kingdom
| | | | | |
Collapse
|
37
|
Abstract
This issue of
Interface Focus
is a collection of papers on ‘The biomedical applications of graphene’. The idea to put together this theme issue evolved during discussions between Prof. Peter N.T. Wells CBE, FREng, FMedSci, FRS and myself in mid-2016. Very sadly, about a year ago, Prof. Wells passed away. However, before that and even in the various last stages of his life he was intensely involved in planning this theme issue with me. I am deeply indebted to him for his contributions towards this and I dedicate this theme issue to him as a memorial.
Collapse
|