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Mounayer N, Margel S. Engineering of Silane-Pyrrolidone Nano/Microparticles and Anti-Fogging Thin Coatings. Polymers (Basel) 2024; 16:2013. [PMID: 39065330 DOI: 10.3390/polym16142013] [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: 06/14/2024] [Revised: 07/05/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Polyvinylpyrrolidone (PVP) exhibits remarkable qualities; owing to the strong affinity for water of its pyrrolidone group, which enhances compatibility with aqueous systems, it is effective for stabilizing, binding, or carrying food, drugs, and cosmetics. However, coating the surface of polymeric films with PVP is not practical, as the coatings dissolve easily in water and ethanol. Poly(silane-pyrrolidone) nano/microparticles were prepared by combining addition polymerization of methacryloxypropyltriethoxysilane and N-vinylpyrrolidone, followed by step-growth Stöber polymerization of the formed silane-pyrrolidone monomer. The silane-pyrrolidone monomeric solution was spread on oxidized polyethylene films with a Mayer rod and polymerized to form siloxane (Si-O-Si) self-cross-linked durable anti-fog thin coatings with pyrrolidone groups exposed on the outer surface. The coatings exhibited similar wetting properties to PVP with significantly greater stability. The particles and coatings were characterized by microscopy, contact angle measurements, and spectroscopy, and tested using hot fog. Excellent anti-fogging activity was found.
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Affiliation(s)
- Natalie Mounayer
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Shlomo Margel
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
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2
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Vardar-Yel N, Tütüncü HE, Sürmeli Y. Lipases for targeted industrial applications, focusing on the development of biotechnologically significant aspects: A comprehensive review of recent trends in protein engineering. Int J Biol Macromol 2024; 273:132853. [PMID: 38838897 DOI: 10.1016/j.ijbiomac.2024.132853] [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: 04/15/2024] [Revised: 05/26/2024] [Accepted: 05/31/2024] [Indexed: 06/07/2024]
Abstract
Lipases are remarkable biocatalysts, adept at catalyzing the breakdown of diverse compounds into glycerol, fatty acids, and mono- and di-glycerides via hydrolysis. Beyond this, they facilitate esterification, transesterification, alcoholysis, acidolysis, and more, making them versatile in industrial applications. In industrial processes, lipases that exhibit high stability are favored as they can withstand harsh conditions. However, most native lipases are unable to endure adverse conditions, making them unsuitable for industrial use. Protein engineering proves to be a potent technology in the development of lipases that can function effectively under challenging conditions and fulfill criteria for various industrial processes. This review concentrated on new trends in protein engineering to enhance the diversity of lipase genes and employed in silico methods for predicting and comprehensively analyzing target mutations in lipases. Additionally, key molecular factors associated with industrial characteristics of lipases, including thermostability, solvent tolerance, catalytic activity, and substrate preference have been elucidated. The present review delved into how industrial traits can be enhanced through directed evolution (epPCR, gene shuffling), rational design (FRESCO, ASR), combined engineering strategies (i.e. CAST, ISM, and FRISM) as protein engineering methodologies in contexts of biodiesel production, food processing, and applications of detergent, pharmaceutics, and plastic degradation.
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Affiliation(s)
- Nurcan Vardar-Yel
- Department of Medical Laboratory Techniques, Altınbaş University, 34145 İstanbul, Turkey
| | - Havva Esra Tütüncü
- Department of Nutrition and Dietetics, Malatya Turgut Özal University, 44210 Malatya, Turkey
| | - Yusuf Sürmeli
- Department of Agricultural Biotechnology, Tekirdağ Namık Kemal University, 59030 Tekirdağ, Turkey.
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3
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Gu K, Tan Y, Li S, Chen S, Fang B, Lin K, Tang Y, Zhu M. Sensory Nerve Regulation via H3K27 Demethylation Revealed in Akermanite Composite Microspheres Repairing Maxillofacial Bone Defect. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2400242. [PMID: 38874525 DOI: 10.1002/advs.202400242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 05/14/2024] [Indexed: 06/15/2024]
Abstract
Maxillofacial bone defects exhibit intricate anatomy and irregular morphology, presenting challenges for effective treatment. This study aimed to address these challenges by developing an injectable bioactive composite microsphere, termed D-P-Ak (polydopamine-PLGA-akermanite), designed to fit within the defect site while minimizing injury. The D-P-Ak microspheres biodegraded gradually, releasing calcium, magnesium, and silicon ions, which, notably, not only directly stimulated the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) but also activated sensory nerve cells to secrete calcitonin gene-related peptide (CGRP), a key factor in bone repair. Moreover, the released CGRP enhanced the osteogenic differentiation of BMSCs through epigenetic methylation modification. Specifically, inhibition of EZH2 and enhancement of KDM6A reduced the trimethylation level of histone 3 at lysine 27 (H3K27), thereby activating the transcription of osteogenic genes such as Runx2 and Osx. The efficacy of the bioactive microspheres in bone repair is validated in a rat mandibular defect model, demonstrating that peripheral nerve response facilitates bone regeneration through epigenetic modification. These findings illuminated a novel strategy for constructing neuroactive osteo-inductive biomaterials with potential for further clinical applications.
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Affiliation(s)
- Kaijun Gu
- Center of Craniofacial Orthodontics, Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Yu Tan
- Department of Orthodontics, Shanghai Stomatological Hospital and School of Stomatology, Fudan University Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200001, China
| | - Sitong Li
- Center of Craniofacial Orthodontics, Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Siyue Chen
- Center of Craniofacial Orthodontics, Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Bing Fang
- Department of Orthodontics, Shanghai Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Kaili Lin
- Center of Craniofacial Orthodontics, Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China
- Department of Orthodontics, Shanghai Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yanmei Tang
- Center of Craniofacial Orthodontics, Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Min Zhu
- Center of Craniofacial Orthodontics, Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China
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4
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Umar M, Rehman Y, Ambreen S, Mumtaz SM, Shaququzzaman M, Alam MM, Ali R. Innovative approaches to Alzheimer's therapy: Harnessing the power of heterocycles, oxidative stress management, and nanomaterial drug delivery system. Ageing Res Rev 2024; 97:102298. [PMID: 38604453 DOI: 10.1016/j.arr.2024.102298] [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: 02/01/2024] [Revised: 03/10/2024] [Accepted: 04/05/2024] [Indexed: 04/13/2024]
Abstract
Alzheimer's disease (AD) presents a complex pathology involving amyloidogenic proteolysis, neuroinflammation, mitochondrial dysfunction, and cholinergic deficits. Oxidative stress exacerbates AD progression through pathways like macromolecular peroxidation, mitochondrial dysfunction, and metal ion redox potential alteration linked to amyloid-beta (Aβ). Despite limited approved medications, heterocyclic compounds have emerged as promising candidates in AD drug discovery. This review highlights recent advancements in synthetic heterocyclic compounds targeting oxidative stress, mitochondrial dysfunction, and neuroinflammation in AD. Additionally, it explores the potential of nanomaterial-based drug delivery systems to overcome challenges in AD treatment. Nanoparticles with heterocyclic scaffolds, like polysorbate 80-coated PLGA and Resveratrol-loaded nano-selenium, show improved brain transport and efficacy. Micellar CAPE and Melatonin-loaded nano-capsules exhibit enhanced antioxidant properties, while a tetra hydroacridine derivative (CHDA) combined with nano-radiogold particles demonstrates promising acetylcholinesterase inhibition without toxicity. This comprehensive review underscores the potential of nanotechnology-driven drug delivery for optimizing the therapeutic outcomes of novel synthetic heterocyclic compounds in AD management. Furthermore, the inclusion of various promising heterocyclic compounds with detailed ADMET (Absorption, Distribution, Metabolism, Excretion, and Toxicity) data provides valuable insights for planning the development of novel drug delivery treatments for AD.
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Affiliation(s)
- Mohammad Umar
- Department of Pharmaceutical Chemistry, Delhi Pharmaceutical Sciences and Research University, Pushp Vihar, New Delhi 110017, India
| | - Yasir Rehman
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, Hamdard Nagar, New Delhi 110062, India
| | - Subiya Ambreen
- Department of Pharmaceutical Chemistry, Delhi Pharmaceutical Sciences and Research University, Pushp Vihar, New Delhi 110017, India
| | - Sayed Md Mumtaz
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, Hamdard Nagar, New Delhi 110062, India
| | - Mohd Shaququzzaman
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, Hamdard Nagar, New Delhi 110062, India
| | - Mohammad Mumtaz Alam
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, Hamdard Nagar, New Delhi 110062, India
| | - Ruhi Ali
- Department of Pharmaceutical Chemistry, Delhi Pharmaceutical Sciences and Research University, Pushp Vihar, New Delhi 110017, India.
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Chodkowski M, Terpiłowski K, Románszki L, Klébert S, Mohai M, Károly Z. Effect of Non-Thermal Sulfur Hexafluoride Cold Plasma Modification on Surface Properties of Polyoxymethylene. Chemphyschem 2024; 25:e202300709. [PMID: 38548684 DOI: 10.1002/cphc.202300709] [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: 09/28/2023] [Revised: 01/27/2024] [Indexed: 05/24/2024]
Abstract
X-ray photoelectron spectroscopy was employed to reveal the differences in the chemical structure of the topmost layer after plasma modification. It was found out that changes in the surface properties of the polymer could be observed even after 20 seconds of treatment. The surface becomes hydrophobic or superhydrophobic, with the water contact angles up to 160 degrees. Morphological changes and increased roughness can be observed only in the nanoscale, whereas the structure seems to be unaffected in the microscale. As a result of plasma modification a permanent hydrophobic effect was obtained on the polyoxymethylene surface.
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Affiliation(s)
- Michał Chodkowski
- Department of Interfacial Phenomena, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Słlodowska University in Lublin, pl. Marii Curie-Skłodowskiej 3, 20-031, Lublin, Poland
- Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, ul. Nadbystrzycka 36, 20-618, Lublin, Poland
| | - Konrad Terpiłowski
- Department of Interfacial Phenomena, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Słlodowska University in Lublin, pl. Marii Curie-Skłodowskiej 3, 20-031, Lublin, Poland
| | - Loránd Románszki
- Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar tudósok körútja 2, H 1117, Budapest, Hungary
| | - Szilvia Klébert
- Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar tudósok körútja 2, H 1117, Budapest, Hungary
| | - Miklós Mohai
- Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar tudósok körútja 2, H 1117, Budapest, Hungary
| | - Zoltán Károly
- Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar tudósok körútja 2, H 1117, Budapest, Hungary
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6
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Chokwattananuwat N, Suttapreyasri S. Surface-modified deproteinized human demineralized tooth matrix for bone regeneration: physicochemical characterization and osteoblast cell biocompatibility. Regen Biomater 2024; 11:rbae030. [PMID: 38605851 PMCID: PMC11009026 DOI: 10.1093/rb/rbae030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/29/2024] [Accepted: 03/12/2024] [Indexed: 04/13/2024] Open
Abstract
Tooth presents an intriguing option as a bone graft due to its compositional similarity to bone. However, the deproteinized human demineralized tooth matrix (dpDTM), developed to overcome the limited availability of autologous tooth grafts, has suboptimal pore size and surface roughness. This study aimed to fabricate a surface-modified dpDTM using acid etching and collagen coating, followed by in vitro evaluation of physicochemical and biological properties. The dpDTM was modified into two protocols: Acid-modified dpDTM (A-dpDTM) and collagen-modified dpDTM (C-dpDTM). Results demonstrated that A-dpDTM and C-dpDTM had increased pore sizes and rougher surfaces compared to dpDTM. Collagen immobilization was evidenced by nitrogen presence exclusively in C-dpDTM. All groups had a Ca/P molar ratio of 1.67 and hydroxyapatite as the sole constituent, with 65-67% crystallinity. Degradation rates significantly increased to 30% and 20% for C-dpDTM and A-dpDTM, respectively, compared to 10% for dpDTM after 120 days. Cumulative collagen release of C-dpDTM on Day 30 was 45.16 µg/ml. Osteoblasts attachment and proliferation were enhanced on all scaffolds, especially C-dpDTM, which displayed the highest proliferation and differentiation rates. In conclusion, surface modified of dpDTM, including A-dpDTM and C-dpDTM, significantly enhances bioactivity by altering surface properties and promoting osteoblast activity, thereby demonstrating promise for bone regeneration applications.
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Affiliation(s)
- Natwara Chokwattananuwat
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
| | - Srisurang Suttapreyasri
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
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7
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Atyf Z, Lenne Q, Ghilane J. Electrografting of Phenyl Phosphate Layers onto Glassy Carbon for Tuning Catalytic Activity toward the Hydrogen Evolution Reaction. Molecules 2024; 29:835. [PMID: 38398587 PMCID: PMC10892328 DOI: 10.3390/molecules29040835] [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: 12/23/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
In this study, we explored the surface modification of a glassy carbon electrode through the electrografting of 4-Aminophenyl phosphate, which features heteroatoms and ionic properties. The electrochemical grafting process involves reducing in situ-generated diazonium derivatives. The primary objective of this research was to immobilize organic layers and assess their electrochemical and surface properties. Subsequently, the generated surface serves as a template for the electrochemical growth of Pd and Co nanoparticles on functionalized electrodes. The electrocatalytic performances of these hybrid electrodes in driving the hydrogen evolution reaction were investigated. The obtained results indicate an enhancement in the electrocatalytic activity of the modified electrodes, where lower overpotential and higher stability were observed when the catalyst was electrodeposited onto the attached ionic layer. These findings highlight the synergistic effect between the attached phenyl phosphate moieties and electrocatalysts.
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Affiliation(s)
| | | | - Jalal Ghilane
- Université Paris Cité, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France; (Z.A.); (Q.L.)
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8
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Falsafi SR, Topuz F, Bajer D, Mohebi Z, Shafieiuon M, Heydari H, Rawal S, Sathiyaseelan A, Wang MH, Khursheed R, Enayati MH, Rostamabadi H. Metal nanoparticles and carbohydrate polymers team up to improve biomedical outcomes. Biomed Pharmacother 2023; 168:115695. [PMID: 37839113 DOI: 10.1016/j.biopha.2023.115695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 10/17/2023] Open
Abstract
The convergence of carbohydrate polymers and metal nanoparticles (MNPs) holds great promise for biomedical applications. Researchers aim to exploit the capability of carbohydrate matrices to modulate the physicochemical properties of MNPs, promote their therapeutic efficiency, improve targeted drug delivery, and enhance their biocompatibility. Therefore, understanding various attributes of both carbohydrates and MNPs is the key to harnessing them for biomedical applications. The many distinct types of carbohydrate-MNP systems confer unique capabilities for drug delivery, wound healing, tissue engineering, cancer treatment, and even food packaging. Here, we introduce distinct physicochemical/biological properties of carbohydrates and MNPs, and discuss their potentials and shortcomings (alone and in combination) for biomedical applications. We then offer an overview on carbohydrate-MNP systems and how they can be utilized to improve biomedical outcomes. Last but not least, future perspectives toward the application of such systems are highlighted.
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Affiliation(s)
- Seid Reza Falsafi
- Safiabad Agricultural Research and Education and Natural Resources Center, Agricultural Research, Education and Extension Organization (AREEO), Dezful P.O. Box 333, Iran
| | - Fuat Topuz
- Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Sariyer 34469, Istanbul, Turkey
| | - Dagmara Bajer
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
| | - Zahra Mohebi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Maryam Shafieiuon
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Hajar Heydari
- Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Shruti Rawal
- Department of Pharmaceutical Technology, L.J. Institute of Pharmacy, L J University, Ahmedabad 382210, India; Department of Pharmaceutics, Institute of Pharmacy, Nirma University, S.G. Highway, Chharodi, Ahmedabad, Gujarat 382481, India
| | - Anbazhagan Sathiyaseelan
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, South Korea
| | - Myeong-Hyeon Wang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, South Korea
| | - Rubiya Khursheed
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - M H Enayati
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Hadis Rostamabadi
- Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran.
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9
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Yao Q, Yu Z, Li L, Huang X. Strain and Surface Engineering of Multicomponent Metallic Nanomaterials with Unconventional Phases. Chem Rev 2023; 123:9676-9717. [PMID: 37428987 DOI: 10.1021/acs.chemrev.3c00252] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Multicomponent metallic nanomaterials with unconventional phases show great prospects in electrochemical energy storage and conversion, owing to unique crystal structures and abundant structural effects. In this review, we emphasize the progress in the strain and surface engineering of these novel nanomaterials. We start with a brief introduction of the structural configurations of these materials, based on the interaction types between the components. Next, the fundamentals of strain, strain effect in relevant metallic nanomaterials with unconventional phases, and their formation mechanisms are discussed. Then the progress in surface engineering of these multicomponent metallic nanomaterials is demonstrated from the aspects of morphology control, crystallinity control, surface modification, and surface reconstruction. Moreover, the applications of the strain- and surface-engineered unconventional nanomaterials mainly in electrocatalysis are also introduced, where in addition to the catalytic performance, the structure-performance correlations are highlighted. Finally, the challenges and opportunities in this promising field are prospected.
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Affiliation(s)
- Qing Yao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Zhiyong Yu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Leigang Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- College of Materials Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xiaoqing Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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Maryin PV, Tran TH, Frolova AA, Buldakov MA, Choinzonov EL, Kozelskaya AI, Rutkowski S, Tverdokhlebov SI. Electrospun Poly-L-Lactic Acid Scaffolds Surface-Modified via Reactive Magnetron Sputtering Using Different Mixing Ratios of Nitrogen and Xenon. Polymers (Basel) 2023; 15:2969. [PMID: 37447614 DOI: 10.3390/polym15132969] [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: 05/31/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
Controlled regeneration processes involving tissue growth using the surface and structure of scaffolds, are actively used in tissue engineering. Reactive magnetron sputtering is a versatile surface modification method of both metal and polymer substrates, as the properties of the formed coatings can be modified in a wide range by changing the process parameters. In magnetron sputtering, the working gas and its composition have an influence on the chemical composition and physical characteristics of the obtained coatings. However, there are no studies addressing the influence of the nitrogen/xenon gas mixture ratio in direct current magnetron sputtering on the deposition rate, physicochemical and in vitro properties of surface-modified biocompatible poly-L-lactic acid scaffolds. In this study, the application of mixtures of nitrogen and xenon in various ratios is demonstrated to modify the surface of non-woven poly-L-lactic acid scaffolds by direct current magnetron sputtering of a titanium target. It has been found that the magnetron sputtering parameters chosen do not negatively influence the morphology of the prepared scaffolds, but increase the hydrophilicity. Moreover, quantitative spectroscopic analysis results indicate that the formed coatings are primarily composed of titanium oxide and titanium oxynitride compounds and is dependent on the gas mixture ratio only to a certain extent. Atomic force microscopy investigations of the roughness of the fibers of the electrospun scaffolds and the thickness of the coatings formed on them show that the considerable variations observed in the intrinsic fiber reliefs are due to the formation of a fine layer on the fiber surfaces. The observed decrease in roughness after plasma modification is due to temperature and radiation effects of the plasma. In vitro experiments with human osteosarcoma cells show that the scaffolds investigated here have no cytotoxic effect on these cells. The cells adhere and proliferate well on each of the surface-modified electrospun scaffolds, with stimulation of cell differentiation in the osteogenic direction.
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Affiliation(s)
- Pavel V Maryin
- Weinberg Research Center, School of Nuclear Science & Engineering, National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia
| | - Tuan-Hoang Tran
- Weinberg Research Center, School of Nuclear Science & Engineering, National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia
| | - Anastasia A Frolova
- Cancer Research Institute of Tomsk National Research Medical Center of Russian Academy of Sciences, 5 Kooperativny Street, 634050 Tomsk, Russia
| | - Mikhail A Buldakov
- Cancer Research Institute of Tomsk National Research Medical Center of Russian Academy of Sciences, 5 Kooperativny Street, 634050 Tomsk, Russia
| | - Evgeny L Choinzonov
- Cancer Research Institute of Tomsk National Research Medical Center of Russian Academy of Sciences, 5 Kooperativny Street, 634050 Tomsk, Russia
| | - Anna I Kozelskaya
- Weinberg Research Center, School of Nuclear Science & Engineering, National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia
| | - Sven Rutkowski
- Weinberg Research Center, School of Nuclear Science & Engineering, National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia
| | - Sergei I Tverdokhlebov
- Weinberg Research Center, School of Nuclear Science & Engineering, National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050 Tomsk, Russia
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11
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Villacorta A, Vela L, Morataya-Reyes M, Llorens-Chiralt R, Rubio L, Alaraby M, Marcos R, Hernández A. Titanium-doped PET nanoplastics of environmental origin as a true-to-life model of nanoplastic. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 880:163151. [PMID: 37011676 DOI: 10.1016/j.scitotenv.2023.163151] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/13/2023] [Accepted: 03/25/2023] [Indexed: 05/27/2023]
Abstract
The increased presence of secondary micro/nanoplastics (MNPLs) in the environment requires urgent studies on their potentially hazardous effects on exposed organisms, including humans. In this context, it is essential to obtain representative MNPL samples for such purposes. In our study, we have obtained true-to-life NPLs resulting from the degradation, via sanding, of opaque PET bottles. Since these bottles contain titanium (TiO2NPs), the resulting MNPLs also contain embedded metal. The obtained PET(Ti)NPLs were extensively characterized from a physicochemical point of view, confirming their nanosized range and their hybrid composition. This is the first time these types of NPLs are obtained and characterized. The preliminary hazard studies show their easy internalization in different cell lines, without apparent general toxicity. The demonstration by confocal microscopy that the obtained NPLs contain Ti samples offers this material multiple advantages. Thus, they can be used in in vivo approaches to determine the fate of NPLs after exposure, escaping from the existing difficulties to follow up MNPLs in biological samples.
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Affiliation(s)
- Aliro Villacorta
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain; Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Iquique, Chile
| | - Lourdes Vela
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain; Faculty of Health Sciences Eugenio Espejo, Universidad UTE, Quito, Ecuador
| | - Michelle Morataya-Reyes
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - Raquel Llorens-Chiralt
- AIMPLAS, Plastics Technological Centre, Gustave Eiffel, 4, 46980 Paterna, Valencia, Spain
| | - Laura Rubio
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - Mohamed Alaraby
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain; Zoology Department, Faculty of Sciences, Sohag University, 82524 Sohag, Egypt
| | - Ricard Marcos
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain.
| | - Alba Hernández
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain.
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He X, Wu H, Wang Y, Xiang Y, Zhang K, Rao X, Kang ET, Xu L. Bimodal Antimicrobial Surfaces of Phytic Acid-Prussian Blue Nanoparticles-Cationic Polymer Networks. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2300354. [PMID: 37026671 PMCID: PMC10238204 DOI: 10.1002/advs.202300354] [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: 01/16/2023] [Revised: 03/07/2023] [Indexed: 06/04/2023]
Abstract
Surface modification plays a pivotal role in tailoring the functionalities of a solid material. Introduction of antimicrobial function on material surfaces can provide additional protection against life-threatening bacterial infections. Herein, a simple and universal surface modification method based on surface adhesion and electrostatic interaction of phytic acid (PA) is developed. PA is first functionalized with Prussian blue nanoparticles (PB NPs) via metal chelation and then conjugates with cationic polymers (CPs) through electrostatic interaction. With the aid of surface adherent PA and gravitation effect, the as-formed PA-PB-CP network aggregates are deposited on the solid materials in a substrate-independent manner. Synergistic bactericidal effects of "contact-killing" induced by the CPs and localized photothermal effect caused by the PB NPs endow the substrates with strong antibacterial performance. Membrane integrity, enzymatic activity, and metabolism function of the bacteria are disturbed in contact with the PA-PB-CP coating under near-infrared (NIR) irradiation. The PA-PB-CP modified biomedical implant surfaces exhibit good biocompatibility and synergistic antibacterial effect under NIR irradiation, and eliminate the adhered bacteria both in vitro and in vivo.
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Affiliation(s)
- Xiaodong He
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - HuaJun Wu
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - Yan Wang
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - Yunjie Xiang
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - Kai Zhang
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - Xi Rao
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
| | - En-Tang Kang
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge, 117576, Singapore
| | - Liqun Xu
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China
- Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, P. R. China
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13
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Surface Characterization of Stainless Steel 316L Coated with Various Nanoparticle Types. Int J Biomater 2023; 2023:3997281. [PMID: 36744019 PMCID: PMC9891840 DOI: 10.1155/2023/3997281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/09/2022] [Accepted: 12/29/2022] [Indexed: 01/26/2023] Open
Abstract
Background Material tribology has widely expanded in scope and depth and is extended from the mechanical field to the biomedical field. The present study aimed to characterize the nanocoating of highly pure (99.9%) niobium (Nb), tantalum (Ta), and vanadium (V) deposited on 316L stainless steel (SS) substrates which considered the most widely used alloys in the manufacturing of SS orthodontic components. To date, the coating of SS orthodontic archwires with Nb, Ta, and V using a plasma sputtering method has never been reported. Nanodeposition was performed using a DC plasma sputtering system with three different sputtering times (1, 2, and 3 hours). Results Structural and elemental analyses were conducted on the deposited coatings using XRD, FESEM, and EDS showing a unique phase of coating metals over their substrates with obvious homogeneous even deposition. A highly significant positive correlation was found between sputtering time and thickness of the achieved coatings. AFM revealed a reduction in the surface roughness of 316L SS substrates sputtered with all coating materials, significantly seen in V coatings. Conclusions Sputtering time and coating material play a significant role in terms of microstructure and topography of the achieved coatings being the best in the Ta group; moreover, surface roughness was significantly improved by V coatings. Likewise, it is found to be sputtering time independent for all used coatings.
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14
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Mahović Poljaček S, Tomašegović T, Strižić Jakovljević M, Donevski D. Surface Modification and Properties of Thin Ink Films with Added TiO 2 and ZnO Nanoparticles Applied on Paperboard Substrates. MATERIALS (BASEL, SWITZERLAND) 2023; 16:478. [PMID: 36676213 PMCID: PMC9860621 DOI: 10.3390/ma16020478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
In this study, the surface modification of thin ink films with added nanoparticles was used to improve the functional properties of ink applied on paperboard substrates. The surface modification was performed by additional exposure of the samples to xenon radiation. Anatase TiO2, rutile TiO2 and ZnO were added to the base ink. The effect of surface modification on the surface, structural, and mechanical properties of the printed ink films was determined by FTIR-ATR spectroscopy, calculating the surface free energy and adhesion parameters, performing the rub resistance test of the printed samples, and by measuring the resistance to bending. Color measurements on the ink films were performed in order to observe the optical properties of unmodified and modified samples. The results showed that surface modification significantly improved the adhesion properties of the thin ink films and the mechanical properties of the samples. The results obtained on uncoated and coated paperboard showed that the addition of rutile TiO2 and ZnO nanoparticles had the greatest effect on the rub resistance of the ink films. The results of the color analysis showed that the addition of nanoparticles did not change the optical properties of the modified ink films and that rutile TiO2 and ZnO nanoparticles improved the lightfastness of the applied ink films.
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15
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Wang CG, Surat'man NEB, Mah JJQ, Qu C, Li Z. Surface antimicrobial functionalization with polymers: fabrication, mechanisms and applications. J Mater Chem B 2022; 10:9349-9368. [PMID: 36373687 DOI: 10.1039/d2tb01555b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Undesirable adhesion of microbes such as bacteria, fungi and viruses onto surfaces affects many industries such as marine, food, textile, and healthcare. In particular in healthcare and food packaging, the effects of unwanted microbial contamination can be life-threatening. With the current global COVID-19 pandemic, interest in the development of surfaces with superior anti-viral and anti-bacterial activities has multiplied. Polymers carrying anti-microbial properties are extensively used to functionalize material surfaces to inactivate infection-causing and biocide-resistant microbes including COVID-19. This review aims to introduce the fabrication of polymer-based antimicrobial surfaces through physical and chemical modifications, followed by the discussion of the inactivation mechanisms of conventional biocidal agents and new-generation antimicrobial macromolecules in polymer-modified antimicrobial surfaces. The advanced applications of polymer-based antimicrobial surfaces on personal protective equipment against COVID-19, food packaging materials, biomedical devices, marine vessels and textiles are also summarized to express the research trend in academia and industry.
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Affiliation(s)
- Chen-Gang Wang
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore.
| | - Nayli Erdeanna Binte Surat'man
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore.
| | - Justin Jian Qiang Mah
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Chenyang Qu
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore.,Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore
| | - Zibiao Li
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore. .,Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore.,Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore
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16
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Gaur R, Shahabuddin S, Ahmad I, Sridewi N. Role of Alkylamines in Tuning the Morphology and Optical Properties of SnS 2 Nanoparticles Synthesized by via Facile Thermal Decomposition Approach. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3950. [PMID: 36432233 PMCID: PMC9695573 DOI: 10.3390/nano12223950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
The present study reported the synthesis of SnS2 nanoparticles by using a thermal decomposition approach using tin chloride and thioacetamide in diphenyl ether at 200 °C over 60 min. SnS2 nanoparticles with novel morphologies were prepared by the use of different alkylamines (namely, octylamine (OCA), dodecylamine (DDA), and oleylamine (OLA)), and their role during the synthesis was explored in detail. The synthesized SnS2 nanostructures were characterized using an array of analytical techniques. The XRD results confirmed the formation of hexagonal SnS2, and the crystallite size varied from 6.1 nm to 19.0 nm and from 2.5 to 8.8 nm for (100) and (011) reflections, respectively. The functional group and thermal analysis confirmed the presence of organics on the surface of nanoparticles. The FE-SEM results revealed nanoparticles, nanoplates, and flakes assembled into flower-like morphologies when dodecylamine, octylamine, and oleylamine were used as capping agents, respectively. The analysis of optical properties showed the variation in the bandgap and the concentration of surface defects on the SnS2 nanoparticles. The role of alkylamine as a capping agent was explored and discussed in detail in this paper and the mechanism for the evolution of different morphologies of SnS2 nanoparticles was also proposed.
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Affiliation(s)
- Rama Gaur
- Department of Chemistry, School of Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raysan, Gandhinagar 382426, Gujarat, India
| | - Syed Shahabuddin
- Department of Chemistry, School of Technology, Pandit Deendayal Energy University, Knowledge Corridor, Raysan, Gandhinagar 382426, Gujarat, India
| | - Irfan Ahmad
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia
| | - Nanthini Sridewi
- Department of Maritime Science and Technology, Faculty of Defence Science and Technology, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia
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Jakka D, Matadh AV, Shankar VK, Shivakumar HN, Narasimha Murthy S. Polymer Coated Polymeric (PCP) Microneedles for Controlled Delivery of Drugs (Dermal and Intravitreal). J Pharm Sci 2022; 111:2867-2878. [PMID: 35662543 PMCID: PMC10775835 DOI: 10.1016/j.xphs.2022.05.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/27/2022] [Accepted: 05/27/2022] [Indexed: 10/18/2022]
Abstract
Microneedles are used to deliver drugs topically across the skin and mucous membranes. Dissolvable microneedles are made using soluble polymers, which disintegrates in the tissue and release the entire payload instantaneously including the polymer construct. Often, a slow release of drug into the tissue is desirable to overcome the severity of side effects at the site of administration as well as systemic adverse effects. In addition, controlled release of active pharmaceutical ingredient (API) only (not the excipients) is safe and effective particularly when the drug delivery is intended to sensitive organs like the eye. In this project, the feasibility of fabricating polymer coated polymeric (PCP) microneedles to achieve a gradual release of only the active ingredient from the device was investigated. The potential application of such PCP microneedles in the dermal and intravitreal drug delivery was also explored using animal tissue models. The PCP microneedles were found to be intact even after prolonged contact with the release medium. The time at which 50% (T50%) of dextran (10 K) was released in case of microneedles prepared using 20% of core polymer (PVP-K30) was about 15 min versus less than 5 min in the case of uncoated microneedles. Whereas when the core polymer concentration was increased to 50%, the T50% was increased to 90 min. The rate of release depended on the polymer molecular weight grade. The rate of drug release was not influenced by the total amount of concentration of dextran. The PCP microneedles of lidocaine hydrochloride could constantly release the drug for up to 9 h in the skin tissue. Likewise, the PCP microneedles infused voriconazole, intravitreally for 6 h.
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Affiliation(s)
- Deeksha Jakka
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, University, MS, USA
| | - Anusha V Matadh
- Institute for Drug Delivery and Biomedical Research, Bengaluru 560086, India
| | - Vijay Kumar Shankar
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, University, MS, USA
| | - H N Shivakumar
- Institute for Drug Delivery and Biomedical Research, Bengaluru 560086, India; KLE College of Pharmacy, Bengaluru, 560010, India
| | - S Narasimha Murthy
- Institute for Drug Delivery and Biomedical Research, Bengaluru 560086, India; Topical Products Testing LLC, Oxford, MS 38655, USA.
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18
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Lee D, Charpota N, Mei H, Terlier T, Pietrzak D, Stein GE, Verduzco R. Impact of Processing Effects on Surface Segregation of Bottlebrush Polymer Additives. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dongjoo Lee
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Nilesh Charpota
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Hao Mei
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Tanguy Terlier
- SIMS Lab, Shared Equipment Authority, Rice University, Houston, Texas 77005, United States
| | - Danica Pietrzak
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Gila E. Stein
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Rafael Verduzco
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
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19
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Lyu H, Zhou X, Qian Y, Liu X, Gopinathan G, Pandya M, Qin C, Luan X, Diekwisch TG. Long-acting PFI-2 small molecule release and multilayer scaffold design achieve extensive new formation of complex periodontal tissues with unprecedented fidelity. Biomaterials 2022; 290:121819. [DOI: 10.1016/j.biomaterials.2022.121819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 08/20/2022] [Accepted: 09/19/2022] [Indexed: 11/02/2022]
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20
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Lin J, Xu L, Zheng Y, Wu D, Yue J. Imitation-mussel fluorescent silicon quantum dots for selective labeling and imaging of bacteria and biofilms. Front Bioeng Biotechnol 2022; 10:971682. [PMID: 36032721 PMCID: PMC9411794 DOI: 10.3389/fbioe.2022.971682] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 07/11/2022] [Indexed: 11/18/2022] Open
Abstract
Selective labeling of distinct bacteria and biofilm is poised for the fundamental understanding of bacterial activities, interactions, and coupled phenomena occurring at the microscale. However, a simple and effective way to achieve selective bacterial labeling is still lacking. Herein, we report a fluorescence probe with core-shell nanostructure that has polydopamine (PDA) coating on the surface of fluorescent silicon quantum dots (SiQDs@PDA). The surface of the SiQDs@PDA can be functionalized by various molecules (2-mercaptoethylamine hydrochloride, PEG, d-alanine, glucose amide) through different strategies (Michael addition, π-π interaction, and ion–ion interaction). Importantly, the d-alanine (D-Ala)- and gluconamide (Glc)-functionalized SiQDs@PDA fluorescence probes are capable of selectively labeling gram-positive and gram-negative bacteria, as well as their biofilms. The excellent performance in universal functionalization and selective labeling and imaging of bacteria and their biofilms demonstrate that SiQDs@PDA are a promising fluorescence tool in microbe research.
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Affiliation(s)
| | | | | | - Dalin Wu
- *Correspondence: Dalin Wu, ; Jun Yue,
| | - Jun Yue
- *Correspondence: Dalin Wu, ; Jun Yue,
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21
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Effect of reaction conditions on gamma radiation-induced graft polymerization of α-methyl styrene onto polyethersulfone films: a kinetic study. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08455-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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22
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Mohd Sabee MMS, Itam Z, Beddu S, Zahari NM, Mohd Kamal NL, Mohamad D, Zulkepli NA, Shafiq MD, Abdul Hamid ZA. Flame Retardant Coatings: Additives, Binders, and Fillers. Polymers (Basel) 2022; 14:polym14142911. [PMID: 35890685 PMCID: PMC9324192 DOI: 10.3390/polym14142911] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022] Open
Abstract
This review provides an intensive overview of flame retardant coating systems. The occurrence of flame due to thermal degradation of the polymer substrate as a result of overheating is one of the major concerns. Hence, coating is the best solution to this problem as it prevents the substrate from igniting the flame. In this review, the descriptions of several classifications of coating and their relation to thermal degradation and flammability were discussed. The details of flame retardants and flame retardant coatings in terms of principles, types, mechanisms, and properties were explained as well. This overview imparted the importance of intumescent flame retardant coatings in preventing the spread of flame via the formation of a multicellular charred layer. Thus, the intended intumescence can reduce the risk of flame from inherently flammable materials used to maintain a high standard of living.
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Affiliation(s)
- Mohd Meer Saddiq Mohd Sabee
- Emerging Polymer Group, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.M.S.M.S.); (N.A.Z.); (M.D.S.)
| | - Zarina Itam
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia; (S.B.); (N.M.Z.); (N.L.M.K.); (D.M.)
- Correspondence: (Z.I.); (Z.A.A.H.)
| | - Salmia Beddu
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia; (S.B.); (N.M.Z.); (N.L.M.K.); (D.M.)
| | - Nazirul Mubin Zahari
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia; (S.B.); (N.M.Z.); (N.L.M.K.); (D.M.)
| | - Nur Liyana Mohd Kamal
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia; (S.B.); (N.M.Z.); (N.L.M.K.); (D.M.)
| | - Daud Mohamad
- Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia; (S.B.); (N.M.Z.); (N.L.M.K.); (D.M.)
| | - Norzeity Amalin Zulkepli
- Emerging Polymer Group, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.M.S.M.S.); (N.A.Z.); (M.D.S.)
| | - Mohamad Danial Shafiq
- Emerging Polymer Group, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.M.S.M.S.); (N.A.Z.); (M.D.S.)
| | - Zuratul Ain Abdul Hamid
- Emerging Polymer Group, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia; (M.M.S.M.S.); (N.A.Z.); (M.D.S.)
- Correspondence: (Z.I.); (Z.A.A.H.)
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Delmez V, Tomasetti B, Daphnis T, Poleunis C, Lauzin C, Dupont-Gillain C, Delcorte A. Gas Cluster Ion Beams as a Versatile Soft-Landing Tool for the Controlled Construction of Thin (Bio)Films. ACS APPLIED BIO MATERIALS 2022; 5:3180-3192. [PMID: 35801397 DOI: 10.1021/acsabm.2c00169] [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: 11/28/2022]
Abstract
Surface biofunctionalization with proteins is the key to many biomedical applications. In this study, a solvent-free method for the controlled construction of protein thin films is reported. Using large argon gas cluster ion beams, proteins are sputtered from a target (a pool of pure proteins), and collected on a chosen substrate, being nearly any solid material. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) revealed the presence of intact protein molecules on the collectors. Furthermore, lowering the energy per atom in the cluster projectiles down to 1 eV/atom allowed more than 60% of bradykinin molecules to be transferred intact. This protein deposition method offers a precise control of the film thickness as the transferred protein quantity is proportional to the argon clusters ion dose reached for the transfer. This major feature enables building protein films from (sub)mono- to multilayers, without upper limitation of the thickness. A procedure was developed to measure the film thickness in situ the ToF-SIMS instrument. The versatility and potential of this soft-landing alternative for further applications is demonstrated on the one hand by building a protein thin film at the surface of paper, a substrate hardly compatible with solution-based adsorption methods. On the other hand, the possibility to achieve alternated multilayer buildup is demonstrated with the construction of a bilayer composed of bradykinin and Irganox, with the two layers well separated. These results lay the first stone toward original and complex multilayers that could previously not be considered with solution-based adsorption methods, and this regardless of the substrate nature.
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Affiliation(s)
- Vincent Delmez
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Benjamin Tomasetti
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Thomas Daphnis
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Claude Poleunis
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Clément Lauzin
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Christine Dupont-Gillain
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Arnaud Delcorte
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
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Analysis of Composite Coating of Deep Drawing Tool. COATINGS 2022. [DOI: 10.3390/coatings12060863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Modern coating methods have become an important part of industrial practice. For some materials and operations, the use of abrasion-resistant and hard coatings is an absolute necessity; for others, they are the key to greater efficiency and productivity. The aim of this work was to apply and subsequently analyze a new type of thin coating micro-layers TiAlN and TiAlCN, applied using HIPIMS coating technology from a physical point of view. In particular, chemical composition (EDS) and microstructure analyses were carried out in the area of applied coatings. Prepared cross-sectional metallographic samples were evaluated using electron microscopy. A detailed microstructural characterization of the individual elements was carried out on the lamellae of the investigated sample using transmission electron microscopy. It was found that this new multilayer micro-coating based on TiAlN + TiAlCN at a thickness of 5.8 µm increases the repeatability of production strokes by 200%. This finding was confirmed by testing the production of cartridges in the real operation of a large manufacturing company.
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Gabriel M, Bollensdorff C, Raynaud CM. Surface Modification of Polytetrafluoroethylene and Polycaprolactone Promoting Cell-Selective Adhesion and Growth of Valvular Interstitial Cells. J Funct Biomater 2022; 13:jfb13020070. [PMID: 35735925 PMCID: PMC9225263 DOI: 10.3390/jfb13020070] [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: 03/20/2022] [Revised: 05/20/2022] [Accepted: 05/26/2022] [Indexed: 01/27/2023] Open
Abstract
Tissue engineering concepts, which are concerned with the attachment and growth of specific cell types, frequently employ immobilized ligands that interact preferentially with cell types of interest. Creating multicellular grafts such as heart valves calls for scaffolds with spatial control over the different cells involved. Cardiac heart valves are mainly constituted out of two cell types, endothelial cells and valvular interstitial cells. To have control over where which cell type can be attracted would enable targeted cell settlement and growth contributing to the first step of an engineered construct. For endothelial cells, constituting the outer lining of the valve tissue, several specific peptide ligands have been described. Valvular interstitial cells, representing the bulk of the leaflet, have not been investigated in this regard. Two receptors, the integrin α9β1 and CD44, are known to be highly expressed on valvular interstitial cells. Here, we demonstrate that by covalently grafting the corresponding peptide and polysaccharide ligand onto an erodible, polycaprolactone (PCL), and a non-degradable, polytetrafluoroethylene (PTFE), polymer, surfaces were generated that strongly support valvular interstitial cell colonization with minimal endothelial cell and reduced platelet adhesion. The technology for covalent binding of corresponding ligands is a key element towards tissue engineered cardiac valves for in vitro applications, but also towards future in vivo application, especially in combination with degradable scaffold material.
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Affiliation(s)
- Matthias Gabriel
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, 14197 Berlin, Germany
- Correspondence: ; Tel.: +49-3-450-562224
| | | | - Christophe Michel Raynaud
- Pediatric Cancer Omics Lab., Cancer Group, Research Branch, Sidra Medicine, Doha P.O. Box 26999, Qatar;
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Patel P, Roy A, Sharifi N, Stoyanov P, Chromik RR, Moreau C. Tribological Performance of High-Entropy Coatings (HECs): A Review. MATERIALS (BASEL, SWITZERLAND) 2022; 15:3699. [PMID: 35629725 PMCID: PMC9147710 DOI: 10.3390/ma15103699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/29/2022] [Accepted: 05/16/2022] [Indexed: 02/05/2023]
Abstract
Surface coatings that operate effectively at elevated temperatures provide compatibility with critical service conditions as well as improved tribological performance of the components. High-entropy coatings (HECs), including metallic, ceramics, and composites, have gained attention all over the world and developed rapidly over the past 18 years, due to their excellent mechanical and tribological properties. High-entropy alloys (HEAs) are defined as alloys containing five or more principal elements in equal or close to equal atomic percentage. Owing to the high configurational entropy compared to conventional alloys, HEAs are usually composed of a simple solid solution phase, such as the BCC and FCC phases, instead of complex, brittle intermetallic phases. Several researchers have investigated the mechanical, oxidation, corrosion and wear properties of high-entropy oxides, carbides, borides, and silicates using various coating and testing techniques. More recently, the friction and wear characteristics of high-entropy coatings (HECs) have gained interest within various industrial sectors, mainly due to their favourable mechanical and tribological properties at high temperatures. In this review article, the authors identified the research studies and developments in high-entropy coatings (HECs) fabricated on various substrate materials using different synthesis methods. In addition, the current understanding of the HECs characteristics is critically reviewed, including the fabrication routes of targets/feedstock, synthesis methods utilized in various research studies, microstructural and tribological behaviour from room temperature to high temperatures.
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Affiliation(s)
- Payank Patel
- Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada; (A.R.); (N.S.)
- Department of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0G4, Canada
| | - Amit Roy
- Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada; (A.R.); (N.S.)
- Department of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0G4, Canada
| | - Navid Sharifi
- Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada; (A.R.); (N.S.)
| | - Pantcho Stoyanov
- Department of Chemical and Materials Engineering, Concordia University, Montreal, QC H3G 1M8, Canada
| | - Richard R. Chromik
- Department of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0G4, Canada
| | - Christian Moreau
- Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada; (A.R.); (N.S.)
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Selvamani V, Kadian S, Detwiler DA, Zareei A, Woodhouse I, Qi Z, Peana S, Alcaraz AM, Wang H, Rahimi R. Laser-Assisted Nanotexturing and Silver Immobilization on Titanium Implant Surfaces to Enhance Bone Cell Mineralization and Antimicrobial Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4014-4027. [PMID: 35312330 DOI: 10.1021/acs.langmuir.2c00008] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite the great advancement and wide use of titanium (Ti) and Ti-based alloys in different orthopedic implants, device-related infections remain the major complication in modern orthopedic and trauma surgery. Most of these infections are often caused by both poor antibacterial and osteoinductive properties of the implant surface. Here, we have demonstrated a facile two-step laser nanotexturing and immobilization of silver onto the titanium implants to improve both cellular integration and antibacterial properties of Ti surfaces. The required threshold laser processing power for effective nanotexturing and osseointegration was systematically determined by the level of osteoblast cells mineralized on the laser nanotextured Ti (LN-Ti) surfaces using a neodymium-doped yttrium aluminum garnet laser (Nd:YAG, wavelength of 1.06 μm). Laser processing powers above 24 W resulted in the formation of hierarchical nanoporous structures (average pore 190 nm) on the Ti surface with a 2.5-fold increase in osseointegration as compared to the pristine Ti surface. Immobilization of silver nanoparticles onto the LN-Ti surface was conducted by dip coating in an aqueous silver ionic solution and subsequently converted to silver nanoparticles (AgNPs) by using a low power laser-assisted photocatalytic reduction process. Structural and surface morphology analysis via XRD and SEM revealed a uniform distribution of Ag and the formation of an AgTi-alloy interface on the Ti surface. The antibacterial efficacy of the LN-Ti with laser immobilized silver (LN-Ti/LI-Ag) was tested against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The LN-Ti/LI-Ag surface was observed to have efficient and stable antimicrobial properties for over 6 days. In addition, it was found that the LN-Ti/LI-Ag maintained a cytocompatibility and bone cell mineralization property similar to the LN-Ti surface. The differential toxicity of the LN-Ti/LI-Ag between bacterial and cellular species qualifies this approach as a promising candidate for novel rapid surface modification of biomedical metal implants.
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Affiliation(s)
- Vidhya Selvamani
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Sachin Kadian
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | | | - Amin Zareei
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Ian Woodhouse
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Zhimin Qi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Samuel Peana
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Alejandro M Alcaraz
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Rahim Rahimi
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2050, United States
- Birck Nanotechnology Research Center, Purdue University, West Lafayette, Indiana 47907-2050, United States
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Kantarcıoğlu M, Karaaslan Tunç MG, Gürses C, Ateş B, Köytepe S. Fabrication, thermal and in vitro behaviors of ciprofloxacin loaded β-cyclodextrin-PEG based polyurethanes as potential biomaterial for wound dressing applications. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2022. [DOI: 10.1080/10601325.2022.2048954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Melike Kantarcıoğlu
- Department of Chemistry, Science and Literature Faculty, Inonu University, Malatya, Turkey
| | - Merve Gökşin Karaaslan Tunç
- Department of Chemistry, Science and Literature Faculty, Inonu University, Malatya, Turkey
- Department of Property Protection and Security, Taskent Vocational High School, Selcuk University, Konya, Turkey
| | - Canbolat Gürses
- Department of Molecular Biology and Genetics, Science and Literature Faculty, Inonu University, Malatya, Turkey
| | - Burhan Ateş
- Department of Chemistry, Science and Literature Faculty, Inonu University, Malatya, Turkey
| | - Süleyman Köytepe
- Department of Chemistry, Science and Literature Faculty, Inonu University, Malatya, Turkey
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Growth of Anodic Layers on 304L Stainless Steel Using Fluoride Free Electrolytes and Their Electrochemical Behavior in Chloride Solution. MATERIALS 2022; 15:ma15051892. [PMID: 35269125 PMCID: PMC8912120 DOI: 10.3390/ma15051892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 12/31/2021] [Accepted: 03/01/2022] [Indexed: 12/13/2022]
Abstract
Anodic layers have been grown on 304L stainless steel (304L SS) using two kinds of fluoride-free organic electrolytes. The replacement of NH4F for NaAlO2 or Na2SiO3 in the glycerol solution and the influence of the H2O concentration have been examined. The obtained anodic layers were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and potentiodynamic polarization tests. Here, it was found that, although the anodic layers fabricated within the NaAlO2-electrolyte and high H2O concentrations presented limited adherence to the substrate, the anodizing in the Na2SiO3-electrolyte and low H2O concentrations allowed the growth oxide layers, and even a type of ordered morphology was observed. Furthermore, the electrochemical tests in chloride solution determined low chemical stability and active behavior of oxide layers grown in NaAlO2-electrolyte. In contrast, the corrosion resistance was improved approximately one order of magnitude compared to the non-anodized 304L SS substrate for the anodizing treatment in glycerol, 0.05 M Na2SiO3, and 1.7 vol% H2O at 20 mA/cm2 for 6 min. Thus, this anodizing condition offers insight into the sustainable growth of oxide layers with potential anti-corrosion properties.
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Futalan CM, Choi AES, Soriano HGO, Cabacungan MKB, Millare JC. Modification Strategies of Kapok Fiber Composites and Its Application in the Adsorption of Heavy Metal Ions and Dyes from Aqueous Solutions: A Systematic Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052703. [PMID: 35270400 PMCID: PMC8910290 DOI: 10.3390/ijerph19052703] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 12/27/2021] [Accepted: 01/13/2022] [Indexed: 11/16/2022]
Abstract
Kapok fiber (Ceiba pentandra) belongs to a group of natural fibers that are mainly composed of cellulose, lignin, pectin, and small traces of inorganic compounds. These fibers are lightweight with hollow tubular structure that is easy to process and abundant in nature. Currently, kapok fibers are used in industry as filling material for beddings, upholstery, soft toys, and nonwoven materials. However, kapok fiber has also a potential application in the adsorptive removal of heavy metal ions and dyes from aqueous systems. This study aims to provide a comprehensive review about the recent developments on kapok fiber composites including its chemical properties, wettability, and surface morphology. Effective and innovative kapok fiber composites are analyzed with the help of characterization tools such as scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and Brunauer-Emmett-Teller analysis. Different pre-treatment methods such as alkali and acid pre-treatment, oxidation pre-treatment, and Fenton reaction are discussed. These techniques are applied to enhance the hydrophilicity and to generate rougher fiber surfaces. Moreover, surface modification and synthesis of kapok fiber-based composites and its environmental applications are examined. There are various methods in the fabrication of kapok fiber composites that include chemical modification and polymerization. These procedures allow the kapok fiber composites to have higher adsorption capacities for selective heavy metal and dye removal.
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Affiliation(s)
- Cybelle Morales Futalan
- Department of Community and Environmental Resource Planning, University of the Philippines, Los Baños 4031, Laguna, Philippines
- Correspondence: or
| | - Angelo Earvin S. Choi
- Department of Chemical Engineering, De La Salle University, Taft Avenue, Manila 2401, Metro Manila, Philippines;
| | - Hannah Georgia O. Soriano
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapua University, 658 Muralla St, Intramuros, Manila 1002, Metro Manila, Philippines; (H.G.O.S.); (M.K.B.C.); (J.C.M.)
| | - Melbourne Klein B. Cabacungan
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapua University, 658 Muralla St, Intramuros, Manila 1002, Metro Manila, Philippines; (H.G.O.S.); (M.K.B.C.); (J.C.M.)
| | - Jeremiah C. Millare
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapua University, 658 Muralla St, Intramuros, Manila 1002, Metro Manila, Philippines; (H.G.O.S.); (M.K.B.C.); (J.C.M.)
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31
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Haernvall K, Fladischer P, Schoeffmann H, Zitzenbacher S, Pavkov-Keller T, Gruber K, Schick M, Yamamoto M, Kuenkel A, Ribitsch D, Guebitz GM, Wiltschi B. Residue-Specific Incorporation of the Non-Canonical Amino Acid Norleucine Improves Lipase Activity on Synthetic Polyesters. Front Bioeng Biotechnol 2022; 10:769830. [PMID: 35155387 PMCID: PMC8826565 DOI: 10.3389/fbioe.2022.769830] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 01/07/2022] [Indexed: 11/19/2022] Open
Abstract
Environmentally friendly functionalization and recycling processes for synthetic polymers have recently gained momentum, and enzymes play a central role in these procedures. However, natural enzymes must be engineered to accept synthetic polymers as substrates. To enhance the activity on synthetic polyesters, the canonical amino acid methionine in Thermoanaerobacter thermohydrosulfuricus lipase (TTL) was exchanged by the residue-specific incorporation method for the more hydrophobic non-canonical norleucine (Nle). Strutural modelling of TTL revealed that residues Met-114 and Met-142 are in close vicinity of the active site and their replacement by the norleucine could modulate the catalytic activity of the enzyme. Indeed, hydrolysis of the polyethylene terephthalate model substrate by the Nle variant resulted in significantly higher amounts of release products than the Met variant. A similar trend was observed for an ionic phthalic polyester containing a short alkyl diol (C5). Interestingly, a 50% increased activity was found for TTL [Nle] towards ionic phthalic polyesters containing different ether diols compared to the parent enzyme TTL [Met]. These findings clearly demonstrate the high potential of non-canonical amino acids for enzyme engineering.
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Affiliation(s)
| | - Patrik Fladischer
- Acib–Austrian Centre of Industrial Biotechnology, Graz, Austria
- Institute of Molecular Biotechnology, Graz University of Technology, Graz, Austria
| | | | | | - Tea Pavkov-Keller
- Acib–Austrian Centre of Industrial Biotechnology, Graz, Austria
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
- Field of Excellence BioHealth—University of Graz, Graz, Austria
| | - Karl Gruber
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
- Field of Excellence BioHealth—University of Graz, Graz, Austria
| | | | | | | | - Doris Ribitsch
- Acib–Austrian Centre of Industrial Biotechnology, Graz, Austria
- Institute for Environmental Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
- *Correspondence: Doris Ribitsch,
| | - Georg M. Guebitz
- Acib–Austrian Centre of Industrial Biotechnology, Graz, Austria
- Institute for Environmental Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Birgit Wiltschi
- Acib–Austrian Centre of Industrial Biotechnology, Graz, Austria
- Institute of Molecular Biotechnology, Graz University of Technology, Graz, Austria
- BioTechMed-Graz, Graz, Austria
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Wettability and Adhesion of Polyethylene Powder Treated with Non-Equilibrium Various Gaseous Plasma in Semi-Industrial Equipment. MATERIALS 2022; 15:ma15020686. [PMID: 35057406 PMCID: PMC8780882 DOI: 10.3390/ma15020686] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/10/2022] [Accepted: 01/13/2022] [Indexed: 01/02/2023]
Abstract
Plasma treatment of polyethylene powder was carried out in low-pressure gaseous plasma sustained in a semi-industrial reactor powered with a microwave source, in which it was specifically worked with the residual atmosphere. Timed applications of plasma-treated powder in air atmosphere were carried out to study their influence on the adhesion. Based on wettability and adhesion, a treatment time of 5 min was selected for the study of other working gases (nitrogen, oxygen, hydrogen, argon and a mixture of nitrogen and hydrogen). The measurements of wettability showed the highest adhesion increase for nitrogen. The highest increase of adhesion and of surface oxygen contain shown by oxygen treatment. By contrast, treatment with hydrogen resulted in increased roughness of the sintered surface of the powder. The selection of appropriate working gases which are not standard in industrial processes enables one to atypically regulate the adhesion or wettability.
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Kandory A, Goncalves AM, Frégnaux M, Cattey H, Alaoui-Sossé B, Aleya L, Herlem G. Gold modification by reduction of a diazonium salt prepared from an aliphatic diamine: a new useful means to remove hazardous substances. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1239-1245. [PMID: 34350575 DOI: 10.1007/s11356-021-15696-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
We studied the electrochemical reduction based on gold electrode of a diazonium salt prepared from ethylenediamine. This is the first time where the covalent functionalization on the gold electrode of an alkyldiazonium salt, 2-aminoethane-1-diazonium chloride, is demonstrated. This step requires the preparation beforehand by diazotization of one amine group from ethylenediamine. The resulting electrodeposited ethylamine film was confirmed by spectroscopic characterizations from gold surface modification monitored by electrochemical quartz crystal microbalance (EQCM) coupled to cyclic voltammetry (CV). The development of chemosensors based on such a covalent functionalization of a metal can reduce the chemical threats to human health along with drastically removing contaminants according to the green chemistry principles.
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Affiliation(s)
- Ahmed Kandory
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique EA 4662, UFR Sciences & Techniques, CHU J. Minjoz, Université de Franche-Comté, cedex, 25030, Besançon, France
- Department of Chemistry, College of Science, University of Diyala, Baqubah, Iraq
| | - Anne-Marie Goncalves
- Institut Lavoisier, UMR CNRS 8180, 45 av. Des Etats-Unis, cedex, 78035, Versailles, France
| | - Mathieu Frégnaux
- Institut Lavoisier, UMR CNRS 8180, 45 av. Des Etats-Unis, cedex, 78035, Versailles, France
| | - Hélène Cattey
- Institut ICMUB - CNRS 6302, Université de Bourgogne, UFR Sciences et Techniques Mirande, 9 Avenue Alain Savary, 21000, Dijon, France
| | - Badr Alaoui-Sossé
- CNRS 6249-Université de Franche-Comté, 16, route de Gray, F-25030, Besançon cedex, France
| | - Lotfi Aleya
- CNRS 6249-Université de Franche-Comté, 16, route de Gray, F-25030, Besançon cedex, France.
| | - Guillaume Herlem
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique EA 4662, UFR Sciences & Techniques, CHU J. Minjoz, Université de Franche-Comté, cedex, 25030, Besançon, France
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Effect of μPlasma Modification on the Wettability and the Ageing Behaviour of Glass Fibre Reinforced Polyamide 6 (GFPA6). MATERIALS 2021; 14:ma14247721. [PMID: 34947314 PMCID: PMC8703427 DOI: 10.3390/ma14247721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 12/19/2022]
Abstract
Glass fibre reinforced polyamide 6 (GFPA6) thermoplastic composites (TPCs) are promising materials with excellent properties, but due to their low surface free energy they are usually difficult to wet, and therefore, possesses poor adhesion properties. μPlasma modification offers potential solutions to this problem through functionalisation of the GFPA6 surface. In this study, the effect of μPlasma on the wetting behaviour of GFPA6 surfaces was investigated. Following single μPlasma treatment scans of GFPA6 samples, a substantial enhancement in wettability was observed. However, the effect of the μPlasma modification was subject to an ageing (hydrophobic recovery) phenomenon, although the enhancement was still partially maintained after 4 weeks. The ageing process was slower when the GFPA6 material was pre-dried and stored in low humidity conditions, thereby demonstrating the importance of the storage environment to the rate of ageing. Orientation of the fibres to the observed contact angle was found to be crucial for obtaining reproducible measurements with lower deviation. The influence of testing liquid, droplet volume and surface texture on the repeatability of the measured contact angle were also investigated.
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Modified Nanodiamonds as a Means of Polymer Surface Functionalization. From Fouling Suppression to Biosensor Design. NANOMATERIALS 2021; 11:nano11112980. [PMID: 34835744 PMCID: PMC8624887 DOI: 10.3390/nano11112980] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 11/16/2022]
Abstract
The development of different methods for tuning surface properties is currently of great interest. The presented work is devoted to the use of modified nanodiamonds to control the wetting and biological fouling of polymers using optical sensors as an example. We have shown that, depending on the type of modification and the amount of nanodiamonds, the surface of the same fluorinated polymer can have both bactericidal properties and, on the contrary, good adhesion to the biomaterial. The precise control of wetting and biofouling properties of the surface was achieved by the optimization of the modified nanodiamonds thermal anchoring conditions. In vitro and in vivo tests have shown that the fixation of amine functional groups leads to inhibition of biological activity, while the presence of a large number of polar groups of mixed composition (amide and acid chloride) promotes adhesion of the biomaterial and allows one to create a biosensor on-site. A comprehensive study made it possible to establish that in the first 5 days the observed biosensor response is provided by cells adhered to the surface due to the cell wall interaction. On the 7th day, the cells are fixed by means of the polysaccharide matrix, which provides much better retention on the surface and a noticeably greater response to substrate injections. Nevertheless, it is important to note that even 1.5 h of incubation is sufficient for the formation of the reliable bioreceptor on the surface with the modified nanodiamonds. The approach demonstrated in this work makes it possible to easily and quickly isolate the microbiome on the surface of the sensor and perform the necessary studies of its substrate specificity or resistance to toxic effects.
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Vijay R, Mendhi J, Prasad K, Xiao Y, MacLeod J, Ostrikov K(K, Zhou Y. Carbon Nanomaterials Modified Biomimetic Dental Implants for Diabetic Patients. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2977. [PMID: 34835740 PMCID: PMC8625459 DOI: 10.3390/nano11112977] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 10/27/2021] [Accepted: 11/01/2021] [Indexed: 01/14/2023]
Abstract
Dental implants are used broadly in dental clinics as the most natural-looking restoration option for replacing missing or highly diseased teeth. However, dental implant failure is a crucial issue for diabetic patients in need of dentition restoration, particularly when a lack of osseointegration and immunoregulatory incompetency occur during the healing phase, resulting in infection and fibrous encapsulation. Bio-inspired or biomimetic materials, which can mimic the characteristics of natural elements, are being investigated for use in the implant industry. This review discusses different biomimetic dental implants in terms of structural changes that enable antibacterial properties, drug delivery, immunomodulation, and osseointegration. We subsequently summarize the modification of dental implants for diabetes patients utilizing carbon nanomaterials, which have been recently found to improve the characteristics of biomimetic dental implants, including through antibacterial and anti-inflammatory capabilities, and by offering drug delivery properties that are essential for the success of dental implants.
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Affiliation(s)
- Renjini Vijay
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
| | - Jayanti Mendhi
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
| | - Karthika Prasad
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- School of Engineering, College of Engineering and Computer Science, Australian National University, Canberra, ACT 2600, Australia
| | - Yin Xiao
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Jennifer MacLeod
- School of Chemistry and Physics, Faculty of Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Kostya (Ken) Ostrikov
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- School of Chemistry and Physics, Faculty of Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Yinghong Zhou
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
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Osman N, Devnarain N, Omolo CA, Fasiku V, Jaglal Y, Govender T. Surface modification of nano-drug delivery systems for enhancing antibiotic delivery and activity. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 14:e1758. [PMID: 34643067 DOI: 10.1002/wnan.1758] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 09/15/2021] [Indexed: 12/12/2022]
Abstract
Rampant antimicrobial resistance calls for innovative strategies to effectively control bacterial infections, enhance antibacterial efficacy, minimize side effects, and protect existing antibiotics in the market. Therefore, to enhance the delivery of antibiotics and increase their bioavailability and accumulation at the site of infection, the surfaces of nano-drug delivery systems have been diversely modified. This strategy applies various covalent and non-covalent techniques to introduce specific coating materials that have been found to be effective against various sensitive and resistant microorganisms. In this review, we discuss the techniques of surface modification of nanocarriers loaded with antibacterial agents. Furthermore, saccharides, polymers, peptides, antibiotics, enzymes and cell membranes coatings that have been used for surface functionalization of nano-drug delivery systems are described, emphasizing current approaches for enhancing delivery, bioavailability, and efficacy of surface-modified antibacterial nanocarriers at infection sites. This article offers a critical overview of the potential of surface-modified antibacterial nanocarriers to overcome the limitations of conventional antibiotics in the treatment of bacterial infections. This article is categorized under: Therapeutic Approaches and Drug Discovery > Emerging Technologies Therapeutic Approaches and Drug Discovery > Nanomedicine for Infectious Disease Nanotechnology Approaches to Biology > Nanoscale Systems in Biology.
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Affiliation(s)
- Nawras Osman
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.,Department of Pharmaceutics, Faculty of Pharmacy, University of Gezira, Wad Medani, Sudan
| | - Nikita Devnarain
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Calvin A Omolo
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.,Department of Pharmaceutics and Pharmacy Practice, School of Pharmacy and Health Sciences, United States International University-Africa, Nairobi, Kenya
| | - Victoria Fasiku
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Yajna Jaglal
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Thirumala Govender
- Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
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38
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Effect of Plasma Surface Modification on Print Quality of Biodegradable PLA Films. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11178245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PLA films, as non-absorbent materials, require modification of the surface before the printing process in order to improve the wettability of the substrate and to obtain proper ink adhesion to the substrate. In this paper, the surfaces of two kinds of PLA films were modified using plasma activation with parameters enabling high surface free energy (SFE) values, and then the films were printed on using different kinds of flexographic inks. Two gases, oxygen and argon, were used for activation, as these make it possible to obtain good hydrophilicity and high SFE values while having different effects on the roughness, or the degree of surface etching. Plasma-activated films were subsequently subjected to the measurements of: contact angle with water, diiodomethane and three printing inks, roughness, weight change, strength properties, color and gloss change, and SFE was determined. Unmodified and activated films were flexographically printed in laboratory conditions and then the quality of obtained prints was analyzed. The results showed a strong effect of activation with both oxygen and argon plasma on the SFE value of the films and the contact angles of water and inks, with the gas used for plasma activation and the type of film significantly influencing the thickness of the fused ink layer and the resultant color. Moreover, plasma activation had a especially favorable and significant effect on the quality of prints made with water-based inks, while it had little effect when printing with solvent-based inks.
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Constantinoiu I, Viespe C. Synthesis Methods of Obtaining Materials for Hydrogen Sensors. SENSORS 2021; 21:s21175758. [PMID: 34502649 PMCID: PMC8434051 DOI: 10.3390/s21175758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/18/2021] [Accepted: 08/23/2021] [Indexed: 12/21/2022]
Abstract
The development of hydrogen sensors has acquired a great interest from researchers for safety in fields such as chemical industry, metallurgy, pharmaceutics or power generation, as well as due to hydrogen’s introduction as fuel in vehicles. Several types of sensors have been developed for hydrogen detection, including resistive, surface acoustic wave, optical or conductometric sensors. The properties of the material of the sensitive area of the sensor are of great importance for establishing its performance. Besides the nature of the material, an important role for its final properties is played by the synthesis method used and the parameters used during the synthesis. The present paper highlights recent results in the field of hydrogen detection, obtained using four of the well-known synthesis and deposition methods: sol-gel, co-precipitation, spin-coating and pulsed laser deposition (PLD). Sensors with very good results have been achieved by these methods, which gives an encouraging perspective for their use in obtaining commercial hydrogen sensors and their application in common areas for society.
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Affiliation(s)
- Izabela Constantinoiu
- Laser Department, National Institute for Laser, Plasma and Radiation Physics, Atomistilor 409, RO-077125 Magurele, Romania;
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, RO-011061 Bucharest, Romania
| | - Cristian Viespe
- Laser Department, National Institute for Laser, Plasma and Radiation Physics, Atomistilor 409, RO-077125 Magurele, Romania;
- Correspondence:
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40
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Cazan C, Enesca A, Andronic L. Synergic Effect of TiO 2 Filler on the Mechanical Properties of Polymer Nanocomposites. Polymers (Basel) 2021; 13:polym13122017. [PMID: 34203085 PMCID: PMC8234789 DOI: 10.3390/polym13122017] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 06/11/2021] [Accepted: 06/18/2021] [Indexed: 12/23/2022] Open
Abstract
Nanocomposites with polymer matrix offer excellent opportunities to explore new functionalities beyond those of conventional materials. TiO2, as a reinforcement agent in polymeric nanocomposites, is a viable strategy that significantly enhanced their mechanical properties. The size of the filler plays an essential role in determining the mechanical properties of the nanocomposite. A defining feature of polymer nanocomposites is that the small size of the fillers leads to an increase in the interfacial area compared to traditional composites. The interfacial area generates a significant volume fraction of interfacial polymer, with properties different from the bulk polymer even at low loadings of the nanofiller. This review aims to provide specific guidelines on the correlations between the structures of TiO2 nanocomposites with polymeric matrix and their mechanical properties. The correlations will be established and explained based on interfaces realized between the polymer matrix and inorganic filler. The paper focuses on the influence of the composition parameters (type of polymeric matrix, TiO2 filler with surface modified/unmodified, additives) and technological parameters (processing methods, temperature, time, pressure) on the mechanical strength of TiO2 nanocomposites with the polymeric matrix.
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Affiliation(s)
- Cristina Cazan
- Renewable Energy Systems and Recycling Research Center, Transilvania University of Brasov, 500036 Brasov, Romania
- Correspondence:
| | - Alexandru Enesca
- Product Design, Mechatronics and Environment Department, Transilvania University of Brasov, 500036 Brasov, Romania; (A.E.); (L.A.)
| | - Luminita Andronic
- Product Design, Mechatronics and Environment Department, Transilvania University of Brasov, 500036 Brasov, Romania; (A.E.); (L.A.)
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41
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Daneshmandi S, Lyu Y, Salavati-Fard T, Yuan H, Adnani M, Grabow LC, Chu CW. Atomic Properties of Monoclinic Ag 2Se Thin Film Grown on SrTiO 3 Substrate by Molecular Beam Epitaxy. J Phys Chem Lett 2021; 12:4140-4147. [PMID: 33890797 DOI: 10.1021/acs.jpclett.1c01016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Silver chalcogenides have attracted a great deal of interest due to their promise for exhibiting novel topological properties. Using scanning tunneling microscopy/spectroscopy (STM/S), we have characterized the atomic structure and electronic properties of a monoclinic Ag2Se thin film, similar to β-Ag2Te, grown on a SrTiO3 (STO)(001) substrate by molecular beam epitaxy (MBE). Three different types of Ag2Se atomic terminations are observed on the surface: (i) homogeneous hexagonal-like, (ii) rough mixed, and (iii) flat zigzag-striped structures. Structural analysis indicates that the different atomic terminations stem from different growth directions, which can be attributed to the lattice mismatch between the substrate and the Ag2Se film. STS analysis of these atomic terminations uncovers different features near the Fermi level, indicating constituent- and direction-dependent electronic properties. This Letter presents a practical method to grow monoclinic thin film Ag2Se and provides insight into its physical properties.
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Affiliation(s)
- Samira Daneshmandi
- Department of Physics and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
| | - Yanfeng Lyu
- Department of Physics and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
| | - Taha Salavati-Fard
- Department of Chemical and Biomolecular Engineering and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
| | - Hanming Yuan
- Department of Physics and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
| | - Moein Adnani
- Department of Physics and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
| | - Lars C Grabow
- Department of Chemical and Biomolecular Engineering and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
| | - Ching-Wu Chu
- Department of Physics and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, United States
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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42
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Garg D, Matai I, Sachdev A. Toward Designing of Anti-infective Hydrogels for Orthopedic Implants: From Lab to Clinic. ACS Biomater Sci Eng 2021; 7:1933-1961. [PMID: 33826312 DOI: 10.1021/acsbiomaterials.0c01408] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
An alarming increase in implant failure incidence due to microbial colonization on the administered orthopedic implants has become a horrifying threat to replacement surgeries and related health concerns. In essence, microbial adhesion and its subsequent biofilm formation, antibiotic resistance, and the host immune system's deficiency are the main culprits. An advanced class of biomaterials termed anti-infective hydrogel implant coatings are evolving to subdue these complications. On this account, this review provides an insight into the significance of anti-infective hydrogels for preventing orthopedic implant associated infections to improve the bone healing process. We briefly discuss the clinical course of implant failure, with a prime focus on orthopedic implants. We identify the different anti-infective coating strategies and hence several anti-infective agents which could be incorporated in the hydrogel matrix. The fundamental design criteria to be considered while fabricating anti-infective hydrogels for orthopedic implants will be discussed. We highlight the different hydrogel coatings based on the origin of the polymers involved in light of their antimicrobial efficacy. We summarize the relevant patents reported in the prevention of implant infections, including orthopedics. Finally, the challenges concerning the clinical translation of the aforesaid hydrogels are described, and considerable solutions for improved clinical practice and better future prospects are proposed.
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Affiliation(s)
- Deepa Garg
- Central Scientific Instruments Organisation (CSIR-CSIO), Chandigarh-160030, India.,Academy of Scientific and Innovative Research, CSIR-CSIO, Chandigarh-160030, India
| | - Ishita Matai
- Central Scientific Instruments Organisation (CSIR-CSIO), Chandigarh-160030, India.,Academy of Scientific and Innovative Research, CSIR-CSIO, Chandigarh-160030, India
| | - Abhay Sachdev
- Central Scientific Instruments Organisation (CSIR-CSIO), Chandigarh-160030, India.,Academy of Scientific and Innovative Research, CSIR-CSIO, Chandigarh-160030, India
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43
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Weberová Z, Šourková H, Antoň J, Vacková T, Špatenka P. New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials. Polymers (Basel) 2021; 13:polym13060965. [PMID: 33809870 PMCID: PMC8004110 DOI: 10.3390/polym13060965] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/14/2021] [Accepted: 03/18/2021] [Indexed: 12/11/2022] Open
Abstract
This paper describes a newly developed testing method for determination of the adhesivity of a film sintered from thermoplastic powder. This method is based on the modified EN 15337 standard. Application of this method enables an effective development of thermoplastic composites with enhanced adhesion between reinforcement and matrix and/or high-quality joints between plastics and dissimilar materials. The proposed method was successfully tested on a series of polyethylene powders treated in the oxygen atmosphere for 0–1200 s. Adhesion to metal and glass substrates in dependence on treatment conditions is described along with powder wettability and X-ray photoelectron spectroscopy analysis. The results show an increase in adhesion to metal by 580% and to glass by 1670% for the longest treatment time, compared to a nontreated powder. Sintering of treated powders revealed a strong influence of treatment time on the melting process. The XPS analysis confirmed the formation of new oxygen groups (C–O, C=O, O–C=O). The method reveals a specific behavior of powders based on treatment conditions, which is crucial for the optimization of plasma treatment for the improved adhesion, applicability of polymer powders, and a development of composite materials.
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Affiliation(s)
- Zuzana Weberová
- Correspondence: (Z.W.); (P.Š.); Tel.: +420-607-516-901 (Z.W.)
| | | | | | | | - Petr Špatenka
- Correspondence: (Z.W.); (P.Š.); Tel.: +420-607-516-901 (Z.W.)
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44
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Aguilar-Pérez KM, Avilés-Castrillo JI, Medina DI, Parra-Saldivar R, Iqbal HMN. Insight Into Nanoliposomes as Smart Nanocarriers for Greening the Twenty-First Century Biomedical Settings. Front Bioeng Biotechnol 2020; 8:579536. [PMID: 33384988 PMCID: PMC7770187 DOI: 10.3389/fbioe.2020.579536] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 11/24/2020] [Indexed: 02/05/2023] Open
Abstract
The necessity to develop more efficient, biocompatible, patient compliance, and safer treatments in biomedical settings is receiving special attention using nanotechnology as a potential platform to design new drug delivery systems (DDS). Despite the broad range of nanocarrier systems in drug delivery, lack of biocompatibility, poor penetration, low entrapment efficiency, and toxicity are significant challenges that remain to address. Such practices are even more demanding when bioactive agents are intended to be loaded on a nanocarrier system, especially for topical treatment purposes. For the aforesaid reasons, the search for more efficient nano-vesicular systems, such as nanoliposomes, with a high biocompatibility index and controlled releases has increased considerably in the past few decades. Owing to the stratum corneum layer barrier of the skin, the in-practice conventional/conformist drug delivery methods are inefficient, and the effect of the administered therapeutic cues is limited. The current advancement at the nanoscale has transformed the drug delivery sector. Nanoliposomes, as robust nanocarriers, are becoming popular for biomedical applications because of safety, patient compliance, and quick action. Herein, we reviewed state-of-the-art nanoliposomes as a smart and sophisticated drug delivery approach. Following a brief introduction, the drug delivery mechanism of nanoliposomes is discussed with suitable examples for the treatment of numerous diseases with a brief emphasis on fungal infections. The latter half of the work is focused on the applied perspective and clinical translation of nanoliposomes. Furthermore, a detailed overview of clinical applications and future perspectives has been included in this review.
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Affiliation(s)
| | | | | | | | - Hafiz M. N. Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, Mexico
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45
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Kallas P, Haugen HJ, Gadegaard N, Stormonth-Darling J, Hulander M, Andersson M, Valen H. Adhesion of Escherichia Coli to Nanostructured Surfaces and the Role of Type 1 Fimbriae. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2247. [PMID: 33198386 PMCID: PMC7696039 DOI: 10.3390/nano10112247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/04/2020] [Accepted: 11/10/2020] [Indexed: 01/22/2023]
Abstract
Bacterial fimbriae are an important virulence factor mediating adhesion to both biotic and abiotic surfaces and facilitating biofilm formation. The expression of type 1 fimbriae of Escherichia coli is a key virulence factor for urinary tract infections and catheter-associated urinary tract infections, which represent the most common nosocomial infections. New strategies to reduce adhesion of bacteria to surfaces is therefore warranted. The aim of the present study was to investigate how surfaces with different nanotopography-influenced fimbriae-mediated adhesion. Surfaces with three different nanopattern surface coverages made in polycarbonate were fabricated by injection molding from electron beam lithography nanopatterned templates. The surfaces were constructed with features of approximately 40 nm width and 25 nm height with 100 nm, 250 nm, and 500 nm interspace distance, respectively. The role of fimbriae type 1-mediated adhesion was investigated using the E. coli wild type BW25113 and ΔfimA (with a knockout of major pilus protein FimA) and ΔfimH (with a knockout of minor protein FimH) mutants. For the surfaces with nanotopography, all strains adhered least to areas with the largest interpillar distance (500 nm). For the E. coli wild type, no difference in adhesion between surfaces without pillars and the largest interpillar distance was observed. For the deletion mutants, increased adhesion was observed for surfaces without pillars compared to surfaces with the largest interpillar distance. The presence of a fully functional type 1 fimbria decreased the bacterial adhesion to the nanopatterned surfaces in comparison to the mutants.
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Affiliation(s)
- Pawel Kallas
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0455 Oslo, Norway;
| | - Håvard J Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0455 Oslo, Norway;
| | - Nikolaj Gadegaard
- School of Engineering, University of Glasgow, G12 8QQ Glasgow, UK; (N.G.); (J.S.D.)
| | | | - Mats Hulander
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 58 Göteborg, Sweden; (M.H.); (M.A.)
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 58 Göteborg, Sweden; (M.H.); (M.A.)
| | - Håkon Valen
- Nordic Institute of Dental Materials, 0855 Oslo, Norway;
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46
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Meenambal R, Srinivas Bharath MM. Nanocarriers for effective nutraceutical delivery to the brain. Neurochem Int 2020; 140:104851. [PMID: 32976906 DOI: 10.1016/j.neuint.2020.104851] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 09/07/2020] [Accepted: 09/16/2020] [Indexed: 12/13/2022]
Abstract
Neurodegenerative disorders are common among aging populations around the globe. Most are characterized by loss of neurons, protein aggregates, oxidative stress, mitochondrial damage, neuroinflammation among others. Although symptomatic treatment using conventional pharmacotherapy has been widely employed, their therapeutic success is limited due to varied reasons. In the need to identify an alternative approach, researchers successfully demonstrated the therapeutic utility of plant-derived nutraceuticals in cell and animal models of neurodegenerative conditions. However, most nutraceuticals failed during clinical trials in humans owing to their poor bioavailability in vivo and limited permeability across the blood brain barrier (BBB). The current emphasis is therefore on the improved delivery of nutraceuticals to the brain. In this regard, development of nanoparticle conjugated nutraceuticals to enhance bioavailability and therapeutic efficacy in the brain has gained attention. Here, we review the research advances in nanoparticles conjugated nutraceuticals applied in neurodegenerative disorders and discuss their advantages and limitations, clinical trials and toxicity concerns.
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Affiliation(s)
- Rugmani Meenambal
- Department of Clinical Psychopharmacology and Neurotoxicology, National Institute of Mental Health and Neuro Sciences (NIMHANS), Bangalore, India.
| | - M M Srinivas Bharath
- Department of Clinical Psychopharmacology and Neurotoxicology, National Institute of Mental Health and Neuro Sciences (NIMHANS), Bangalore, India; Neurotoxicology Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences (NIMHANS), Bangalore, India.
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47
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Aguilar S, Bustillos S, Xue S, Ji CH, Mak WH, Rao E, McVerry BT, La Plante EC, Simonetti D, Sant G, Kaner RB. Enhancing Polyvalent Cation Rejection Using Perfluorophenylazide-Grafted-Copolymer Membrane Coatings. ACS APPLIED MATERIALS & INTERFACES 2020; 12:42030-42040. [PMID: 32876431 DOI: 10.1021/acsami.0c07111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surface modification offers a straightforward means to alter and enhance the properties and performance of materials, such as nanofiltration membranes for water softening. Herein, we demonstrate how a membrane's surface charge can be altered by grafting different electrostatically varying copolymers onto commercial membrane surfaces using perfluorophenylazide (PFPA) photochemistry for enhanced ion separation performance. The native membrane's performance-i.e., in terms of divalent cation separation-with copolymer coatings containing a positively charged quaternary ammonium (-N(Me)3+), a negatively charged sulfonate (-SO3-), and an essentially neutral zwitterion (sulfobetaine, -N(Me)2R2+, and -SO3-), respectively, indicates that: (a) the sulfonated polymer induces robust Coulombic exclusion of divalent anions as compared to the negatively charged native membrane surface on account of its higher negative charge; (b) the positively charged ammonium coating induces exclusion of cations more effectively than the native membrane; and significantly, (c) the zwitterion polymer coating, which reduces the surface roughness and improves wettability, in spite of its near-neutral charge enhances exclusion of both divalent cations and anions on account of aperture sieving by the compact zwitterion polymer that arises from its ability to limit the size of ions that transport through the polymer along with dielectric exclusion. The outcomes thereby inform new pathways to achieve size- and charge-based exclusion of ionic, molecular, and other species contained in liquid streams.
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Affiliation(s)
- Stephanie Aguilar
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Steven Bustillos
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Shuangmei Xue
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Chen-Hao Ji
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Wai H Mak
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Ethan Rao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Brian T McVerry
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Erika Callagon La Plante
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Institute for Carbon Management, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Dante Simonetti
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Institute for Carbon Management, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Gaurav Sant
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Institute for Carbon Management, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Richard B Kaner
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Institute for Carbon Management, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
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48
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Plasma Activation of Polyethylene Powder. Polymers (Basel) 2020; 12:polym12092099. [PMID: 32942735 PMCID: PMC7570165 DOI: 10.3390/polym12092099] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/07/2020] [Accepted: 09/07/2020] [Indexed: 11/24/2022] Open
Abstract
Polyethylene powder of average particle diameter of 160 µm was activated in a plasma reactor made from aluminum of volume 64 dm3 at the pressure 100 Pa. Dense oxygen plasma was sustained with a microwave discharge powered by a pulsed magnetron source of power 1 kW mounted onto the top flange of the plasma reactor. Polymer powder was treated in a batch mode with 0.25 kg/batch. The powder was placed into a stainless-steel dish mounted in the center of the reactor where diffusing plasma of low ion density, and the O-atom density of 2 × 1021 m−3 was sustained. The powder was stirred in the dish at the rate of 40 rpm. The evolution of powder wettability versus treatment time was measured using the Washburne method, and the surface composition was determined by X-ray Photoelectron Spectroscopy (XPS). The wettability versus the oxygen concentration assumed a parabolic behavior. The maximal oxygen concentration, as revealed by XPS, was 17.5 at.%, and the maximal increase of wettability was 220%. The efficiency of O-atoms utilization in these experimental conditions was about 10% taking into account the spherical geometry of dust particles and perfectly smooth surface. The method is scalable to large industrial systems.
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Yaqoob AA, Ahmad H, Parveen T, Ahmad A, Oves M, Ismail IMI, Qari HA, Umar K, Mohamad Ibrahim MN. Recent Advances in Metal Decorated Nanomaterials and Their Various Biological Applications: A Review. Front Chem 2020; 8:341. [PMID: 32509720 PMCID: PMC7248377 DOI: 10.3389/fchem.2020.00341] [Citation(s) in RCA: 205] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/01/2020] [Indexed: 12/11/2022] Open
Abstract
Nanoparticles (nanoparticles) have received much attention in biological application because of their unique physicochemical properties. The metal- and metal oxide-supported nanomaterials have shown significant therapeutic effect in medical science. The mechanisms related to the interaction of nanoparticles with animal and plant cells can be used to establish its significant role and to improve their activity in health and medical applications. Various attempts have been made to discuss the antibiotic resistance and antimicrobial activity of metal-supported nanoparticles. Despite all these developments, there is still a need to investigate their performance to overcome modern challenges. In this regard, the present review examines the role of various types of metal-supported nanomaterials in different areas such as antibacterial, antifungal, anticancer, and so on. Based on the significant ongoing research and applications, it is expected that metal-supported nanomaterials play an outstanding role not only in medical but also in other important areas.
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Affiliation(s)
- Asim Ali Yaqoob
- School of Chemical Sciences, Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Hilal Ahmad
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, India
| | | | - Akil Ahmad
- School of Industrial Technology, Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Mohammad Oves
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Iqbal M. I. Ismail
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Chemistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Huda A. Qari
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Biological Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khalid Umar
- School of Chemical Sciences, Universiti Sains Malaysia, Pulau Pinang, Malaysia
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Braz JKFS, Martins GM, Morales N, Naulin P, Fuentes C, Barrera NP, O Vitoriano J, Rocha HAO, Oliveira MF, Alves C, Moura CEB. Live endothelial cells on plasma-nitrided and oxidized titanium: An approach for evaluating biocompatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 113:111014. [PMID: 32487415 DOI: 10.1016/j.msec.2020.111014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/18/2020] [Accepted: 04/22/2020] [Indexed: 02/03/2023]
Abstract
We evaluated the effects of titanium plasma nitriding and oxidation on live endothelial cell viscoelasticity. For this, mechanically polished titanium surfaces and two surfaces treated by planar cathode discharge in nitriding (36N2 and 24H2) and oxidant (36O2 and 24H2). Surfaces were characterized regarding wettability, roughness and chemical composition. Rabbit aortic endothelial cells (RAECs) were cultured on the titanium surfaces. Cell morphology, viability and viscoelasticity were evaluated by scanning electron microscopy (SEM), methyl thiazolyl tetrazolium (MTT) assay and atomic force microscopy (AFM), respectively. Grazing Incidence X-ray Diffraction confirmed the presence of TiN0,26 on the surface (grazing angle theta 1°) of the nitrided samples, decreasing with depth. On the oxidized surface had the formation of TiO3 on the material surface (Theta 1°) and in the deeper layers was noted, with a marked presence of Ti (Theta 3°). Both plasma treatments increased surface roughness and they are hydrophilic (angle <90°). However, oxidation led to a more hydrophilic titanium surface (66.59° ± 3.65 vs. 76.88° ± 2.68; p = 0.001) due to titanium oxide films in their stoichiometric varieties (Ti3O, TiO2, Ti6O), especially Ti3O. Despite focal adhesion on the surfaces, viability was different after 24 h, as cell viability on the oxidized surface was higher than on the nitrided surface (9.1 × 103 vs. 4.5 × 103cells; p < 0.05). This can be explained by analyzing the viscoelastic property of the cellular cytoskeleton (nuclear and peripheral) by AFM. Surface oxidation significantly increased RAECs viscoelasticity at cell periphery, in comparison to the nucleus (2.36 ± 0.3 vs. 1.5 ± 0.4; p < 0.05), and to the RAECs periphery in contact with nitrided surfaces (1.36 ± 0.7; p < 0.05) and polished surfaces (1.55 ± 0.6; p < 0.05). Taken together, our results have shown that titanium plasma treatment directly increased cell viscoelasticity via surface oxidation, and this mechanobiological property subsequently increased biocompatibility.
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Affiliation(s)
- Janine Karla F S Braz
- Department of Animal Science, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil; Escola Multicampi de Ciências Médicas do Rio Grande do Norte, Universidade Federal do Rio Grande do Norte, Brazil.
| | - Gabriel Moura Martins
- Department of Animal Science, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil
| | - Nicole Morales
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Pamela Naulin
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Christian Fuentes
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Nelson P Barrera
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile.
| | - Jussier O Vitoriano
- Laboratório de Plasma Aplicado a Agricultura, Saúde e Meio Ambiente, Universidade Federal do Rio Grande do Norte, Brazil
| | - Hugo A O Rocha
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Brazil.
| | - Moacir F Oliveira
- Department of Animal Science, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil.
| | - Clodomiro Alves
- Laboratório de Plasma Aplicado a Agricultura, Saúde e Meio Ambiente, Universidade Federal do Rio Grande do Norte, Brazil.
| | - Carlos Eduardo B Moura
- Department of Animal Science, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil.
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