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Tripathi S, Raheem A, Dash M, Kumar P, Elsebahy A, Singh H, Manivasagam G, Nanda HS. Surface engineering of orthopedic implants for better clinical adoption. J Mater Chem B 2024. [PMID: 39412900 DOI: 10.1039/d4tb01563k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2024]
Abstract
Musculoskeletal disorders are on the rise, and despite advances in alternative materials, treatment for orthopedic conditions still heavily relies on biometal-based implants and scaffolds due to their strength, durability, and biocompatibility in load-bearing applications. Bare metallic implants have been under scrutiny since their introduction, primarily due to their bioinert nature, which results in poor cell-material interaction. This challenge is further intensified by mechanical mismatches that accelerate failure, tribocorrosion-induced material degradation, and bacterial colonization, all contributing to long-term implant failure and posing a significant burden on patient populations. Recent efforts to improve orthopedic medical devices focus on surface engineering strategies that enhance the interaction between cells and materials, creating a biomimetic microenvironment and extending the service life of these implants. This review compiles various physical, chemical, and biological surface engineering approaches currently under research, providing insights into their potential and the challenges associated with their adoption from bench to bedside. Significant emphasis is placed on exploring the future of bioactive coatings, particularly the development of smart coatings like self-healing and drug-eluting coatings, the immunomodulatory effects of functional coatings and biomimetic surfaces to tackle secondary infections, representing the forefront of biomedical surface engineering. The article provides the reader with an overview of the engineering approaches to surface modification of metallic implants, covering both clinical and research perspectives and discussing limitations and future scope.
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Affiliation(s)
- Shivi Tripathi
- Biomaterials and Biomanufacturing Laboratory, Discipline of Mechanical Engineering, PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur 482005, MP, India.
- International Centre for Sustainable and Net Zero Technologies, PDPM-Indian Institute of Information Technology Design and Manufacturing Jabalpur, Madhya Pradesh 482005, India
| | - Ansheed Raheem
- Centre for Biomaterials, Cellular and Molecular Theranostics & School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India.
| | - Madhusmita Dash
- School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, Argul, Khordha, Odisha 752050, India
| | - Prasoon Kumar
- Biodesign and Medical device laboratory, Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, 769008, Odisha, India
| | - Ahmad Elsebahy
- Center for Translational Oral Research (TOR), Department of Clinical Dentistry, University of Bergen, Årstadveien 19, Bergen 5009, Norway
| | - Harpreet Singh
- Dr B R Ambedkar National Institute of Technology Jalandhar, Grand Trunk Road, Barnala Amritsar Bypass Rd, Jalandhar, Punjab 14401111, India
| | - Geetha Manivasagam
- Centre for Biomaterials, Cellular and Molecular Theranostics & School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India.
| | - Himansu Sekhar Nanda
- Biomaterials and Biomanufacturing Laboratory, Discipline of Mechanical Engineering, PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur 482005, MP, India.
- International Centre for Sustainable and Net Zero Technologies, PDPM-Indian Institute of Information Technology Design and Manufacturing Jabalpur, Madhya Pradesh 482005, India
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2
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Ansari M, Shahlaei M, Hosseinzadeh S, Moradi S. Recent advances in nanostructured delivery systems for vancomycin. Nanomedicine (Lond) 2024; 19:1931-1951. [PMID: 39143926 PMCID: PMC11457640 DOI: 10.1080/17435889.2024.2377063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 06/30/2024] [Indexed: 08/16/2024] Open
Abstract
Despite the development of new generations of antibiotics, vancomycin remained as a high-efficacy antibiotic for treating the infections caused by MRSA. Researchers have explored various nanoformulations, aiming to enhance the therapeutic efficacy of vancomycin. Such novel formulations improve the effectiveness of drug cargoes in treating bacterial infections and minimizing the risk of adverse effects. The vast of researches have focuses on enhancing the permeation ability of vancomycin through different biological barriers especially those of gastrointestinal tract. Increasing the drug loading and tuning the drug release from nanocarrier are other important goal for many conducted studies. This study reviews the newest nano-based formulations for vancomycin as a key antibiotic in treating hospitalized bacterial infections.
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Affiliation(s)
- Mohabbat Ansari
- Department of Tissue Engineering & Applied Cell Science, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohsen Shahlaei
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Simzar Hosseinzadeh
- Department of Tissue Engineering & Applied Cell Science, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sajad Moradi
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Cidade do Carmo C, Brito M, Oliveira JP, Marques A, Ferreira I, Baptista AC. Cellulose Acetate and Polycaprolactone Fibre Coatings on Medical-Grade Metal Substrates for Controlled Drug Release. Polymers (Basel) 2024; 16:2006. [PMID: 39065323 PMCID: PMC11280613 DOI: 10.3390/polym16142006] [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: 06/05/2024] [Revised: 07/03/2024] [Accepted: 07/07/2024] [Indexed: 07/28/2024] Open
Abstract
This study explores a method that has the potential to be cost effective in inhibiting biofilm formation on metallic prostheses, thereby preventing rejection or the requirement for replacement. A cost-effective metal alloy used in biomedical implants was chosen as the substrate, and ibuprofen (Ibu), a well-known anti-inflammatory drug, was selected for drug release tests for its widespread availability and accessibility. Multilayer coatings consisting of cellulose acetate (CA), polycaprolactone (PCL), and chitosan (CHI), with or without ibuprofen (Ibu) content, were applied onto medical-grade stainless steel (SS-316 type) through electrospinning, electrospray, or blow spinning. The adhesion of the CA, PCL, and layered CA/PCL membranes, with thicknesses ranging from 20 to 100 μm, to SS substrates varied between 0.15 N and 0.22 N without CHI, which increased to 0.21 and 0.74 N, respectively, when a CHI interlayer was introduced by electrospraying between the SS and the coatings. Although drug release in a simulated body fluid (SBF) medium is predominantly governed by diffusion-driven mechanisms in all single- and multilayer coatings, a delayed release was noted in CA coatings containing Ibu when overlaid with a PCL coating produced by blow spinning. This suggests avenues for further investigations into combinations of multilayer coatings, both with and without drug-imbued layers.
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Affiliation(s)
- Catarina Cidade do Carmo
- CENIMAT|i3N, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (C.C.d.C.); (M.B.); (J.P.O.); (A.M.)
| | - Miguel Brito
- CENIMAT|i3N, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (C.C.d.C.); (M.B.); (J.P.O.); (A.M.)
| | - J. P. Oliveira
- CENIMAT|i3N, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (C.C.d.C.); (M.B.); (J.P.O.); (A.M.)
| | - Ana Marques
- CENIMAT|i3N, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (C.C.d.C.); (M.B.); (J.P.O.); (A.M.)
- Physics Department, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal
| | - Isabel Ferreira
- CENIMAT|i3N, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (C.C.d.C.); (M.B.); (J.P.O.); (A.M.)
| | - Ana Catarina Baptista
- CENIMAT|i3N, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (C.C.d.C.); (M.B.); (J.P.O.); (A.M.)
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Martins JP, da Silva ET, Fernandes AA, Costa de Oliveira S. Three-Dimensional Melted Electrowriting Drug Coating Fibers for the Prevention of Device-Associated Infections: A Pilot Study. Bioengineering (Basel) 2024; 11:636. [PMID: 39061718 PMCID: PMC11273671 DOI: 10.3390/bioengineering11070636] [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: 04/11/2024] [Revised: 06/09/2024] [Accepted: 06/17/2024] [Indexed: 07/28/2024] Open
Abstract
Medical device-related infections (DRIs), especially prevalent among critically ill patients, impose significant health and economic burdens and are mainly caused by bacteria. Severe infections often necessitate device removal when antibiotic therapy is inefficient, delaying recovery. To tackle this issue, PCL drug-eluting coated meshes were explored, and they were printed via melt electrowriting (MEW). These meshes were coated with gentamicin sulfate (GS) and tetracycline hydrochloride (TCH) and underwent FTIR analysis to confirm drug integration. Antimicrobial activity was assessed via agar diffusion assays and biofilm formation assays against bacterial strains: Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 43300, and Staphylococcus epidermidis ATCC 35984. FTIR analysis evidenced the presence of the drugs in the meshes. TCH displayed broad-spectrum antimicrobial activity against all strains, whereas GS was effective against all except S. aureus. These findings indicate the potential of cost-effective ultra-fine drug coating fibers for medical device applications, offering infection prevention during implantation. This preliminary study demonstrates the feasibility of producing drug-eluting fibers for DRI prevention through a non-toxic, fast, and cost-efficient technique, paving the way for enhanced patient care and reduced healthcare costs.
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Affiliation(s)
- Joana P. Martins
- Associated Laboratory for Energy, Transports and Aerospace (LAETA), Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), 4200-465 Porto, Portugal; (J.P.M.); (E.T.d.S.); (A.A.F.)
| | - Elisabete T. da Silva
- Associated Laboratory for Energy, Transports and Aerospace (LAETA), Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), 4200-465 Porto, Portugal; (J.P.M.); (E.T.d.S.); (A.A.F.)
| | - António A. Fernandes
- Associated Laboratory for Energy, Transports and Aerospace (LAETA), Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), 4200-465 Porto, Portugal; (J.P.M.); (E.T.d.S.); (A.A.F.)
- Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
| | - Sofia Costa de Oliveira
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Center for Health Technology and Services Research—CINTESIS@RISE, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
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Mahmood A, Maher N, Amin F, Alqutaibi AY, Kumar N, Zafar MS. Chitosan-based materials for dental implantology: A comprehensive review. Int J Biol Macromol 2024; 268:131823. [PMID: 38677667 DOI: 10.1016/j.ijbiomac.2024.131823] [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: 01/11/2024] [Revised: 04/16/2024] [Accepted: 04/22/2024] [Indexed: 04/29/2024]
Abstract
Chitosan, a versatile biopolymer, has gained recognition in the discipline of dental implantology due to possessing salient properties. This comprehensive review explores the potential of chitosan in dental implants, focusing on its biocompatibility, bioactivity, and the various chitosan-based materials that have been utilized for dental implant therapy. The review also highlights the importance of surface treatment in dental implants to enhance osseointegration and inhibit bacterial biofilm formation. Additionally, the chemical structure, properties, and sources of chitosan are described, along with its different structural forms. The characteristics of chitosan particularly color, molecular weight, viscosity, and degree of deacetylation are discussed about their influence on its applications. This review provides valuable insights into the promising utilization of polymeric chitosan in enhancing the success and functionality of dental implants. This study highlights the potential applications of chitosan in oral implantology. Chitosan possesses various advantageous properties, including muco-adhesiveness, hemostatic action, biocompatibility, biodegradability, bioactivity, and antibacterial and antifungal activities, which enhance its uses in dental implantology. However, it has limited aqueous solubility at the physiological pH, which sometimes restricts its biological application, but this problem can be overcome by using modified chitosan or chitosan derivatives, which have also shown encouraging results. Recent research suggests that chitosan may act as a promising material for coating titanium-based implants, improving osteointegration together with antibacterial properties.
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Affiliation(s)
- Anum Mahmood
- Department of Science of Dental Materials, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Nazrah Maher
- Department of Science of Dental Materials, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Faiza Amin
- Department of Science of Dental Materials, Dow Dental College, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Ahmed Yaseen Alqutaibi
- Department of Substitutive Dental Sciences, College of Dentistry, Taibah University, Al Madinah, Saudi Arabia; Department of Prosthodontics, College of Dentistry, Ibb University, Ibb, Yemen
| | - Naresh Kumar
- Department of Science of Dental Materials, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Muhammad Sohail Zafar
- Department of Restorative Dentistry, College of Dentistry, Taibah University, Al Madinah, Al Munawwarah, Saudi Arabia; Centre of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, Ajman 346, United Arab Emirates; School of Dentistry, University of Jordan, Amman, Jordan; Department of Dental Materials, Islamic International College, Riphah International University, Islamabad, Pakistan.
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Powojska A, Mystkowski A, Gundabattini E, Mystkowska J. Spin-Coating Fabrication Method of PDMS/NdFeB Composites Using Chitosan/PCL Coating. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1973. [PMID: 38730780 PMCID: PMC11084651 DOI: 10.3390/ma17091973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/22/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024]
Abstract
This paper verified the possibility of applying chitosan and/or ferulic acid or polycaprolactone (PCL)-based coatings to polydimethylsiloxane/neodymium-iron-boron (PDMS/NdFeB) composites using the spin-coating method. The surface modification of magnetic composites by biofunctional layers allows for the preparation of materials for biomedical applications. Biofunctional layered magnetic composites were obtained in three steps. The spin-coating method with various parameters (time and spin speed) was used to apply different substances to the surface of the composites. Scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) were used to analyze the thickness and surface topography. The contact angle of the obtained surfaces was tested. Increasing spin speed and increasing process time for the same speed resulted in decreasing the composite's thickness. The linear and surface roughness for the prepared coatings were approximately 0.2 μm and 0.01 μm, respectively, which are desirable values in the context of biocompatibility. The contact angle test results showed that both the addition of chitosan and PCL to PDMS have reduced the contact angle θ from 105° for non-coated composite to θ~59-88° depending on the coating. The performed modifications gave promising results mainly due to making the surface hydrophilic, which is a desirable feature of projected biomaterials.
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Affiliation(s)
- Anna Powojska
- Department of Biomaterials and Medical Devices, Institute of Biomedical Engineering, Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland;
| | - Arkadiusz Mystkowski
- Department of Automatic Control and Robotics, Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland;
| | - Edison Gundabattini
- Department of Thermal and Energy Engineering, School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore 632 014, India;
| | - Joanna Mystkowska
- Department of Biomaterials and Medical Devices, Institute of Biomedical Engineering, Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland;
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Rad ME, Soylukan C, Kulabhusan PK, Günaydın BN, Yüce M. Material and Design Toolkit for Drug Delivery: State of the Art, Trends, and Challenges. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55201-55231. [PMID: 37994836 DOI: 10.1021/acsami.3c10065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
The nanomaterial and related toolkit have promising applications for improving human health and well-being. Nanobased drug delivery systems use nanoscale materials as carriers to deliver therapeutic agents in a targeted and controlled manner, and they have shown potential to address issues associated with conventional drug delivery systems. They offer benefits for treating various illnesses by encapsulating or conjugating biological agents, chemotherapeutic drugs, and immunotherapeutic agents. The potential applications of this technology are vast; however, significant challenges exist to overcome such as safety issues, toxicity, efficacy, and insufficient capacity. This article discusses the latest developments in drug delivery systems, including drug release mechanisms, material toolkits, related design molecules, and parameters. The concluding section examines the limitations and provides insights into future possibilities.
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Affiliation(s)
- Monireh Esmaeili Rad
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul 34956, Turkey
| | - Caner Soylukan
- SUNUM Nanotechnology Research and Application Centre, Sabanci University, Istanbul 34956, Turkey
| | | | - Beyza Nur Günaydın
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul 34956, Turkey
- SUNUM Nanotechnology Research and Application Centre, Sabanci University, Istanbul 34956, Turkey
| | - Meral Yüce
- SUNUM Nanotechnology Research and Application Centre, Sabanci University, Istanbul 34956, Turkey
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Paradowska-Stolarz A, Mikulewicz M, Laskowska J, Karolewicz B, Owczarek A. The Importance of Chitosan Coatings in Dentistry. Mar Drugs 2023; 21:613. [PMID: 38132934 PMCID: PMC10744558 DOI: 10.3390/md21120613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/15/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
A Chitosan is a copolymer of N-acetyl-D-glucose amine and D-glucose amine that can be easily produced. It is a polymer that is widely utilized to create nanoparticles (NPs) with specific properties for applications in a wide range of human activities. Chitosan is a substance with excellent prospects due to its antibacterial, anti-inflammatory, antifungal, haemostatic, analgesic, mucoadhesive, and osseointegrative qualities, as well as its superior film-forming capacity. Chitosan nanoparticles (NPs) serve a variety of functions in the pharmaceutical and medical fields, including dentistry. According to recent research, chitosan and its derivatives can be embedded in materials for dental adhesives, barrier membranes, bone replacement, tissue regeneration, and antibacterial agents to improve the management of oral diseases. This narrative review aims to discuss the development of chitosan-containing materials for dental and implant engineering applications, as well as the challenges and future potential. For this purpose, the PubMed database (Medline) was utilised to search for publications published less than 10 years ago. The keywords used were "chitosan coating" and "dentistry". After carefully selecting according to these keywords, 23 articles were studied. The review concluded that chitosan is a biocompatible and bioactive material with many benefits in surgery, restorative dentistry, endodontics, prosthetics, orthodontics, and disinfection. Furthermore, despite the fact that it is a highly significant and promising coating, there is still a demand for various types of coatings. Chitosan is a semi-synthetic polysaccharide that has many medical applications because of its antimicrobial properties. This article aims to review the role of chitosan in dental implantology.
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Affiliation(s)
- Anna Paradowska-Stolarz
- Division of Dentofacial Anomalies, Department of Orthodontics and Dentofacial Orthopedics, Wroclaw Medical University, Krakowska 26, 50-425 Wroclaw, Poland; (M.M.); (J.L.)
| | - Marcin Mikulewicz
- Division of Dentofacial Anomalies, Department of Orthodontics and Dentofacial Orthopedics, Wroclaw Medical University, Krakowska 26, 50-425 Wroclaw, Poland; (M.M.); (J.L.)
| | - Joanna Laskowska
- Division of Dentofacial Anomalies, Department of Orthodontics and Dentofacial Orthopedics, Wroclaw Medical University, Krakowska 26, 50-425 Wroclaw, Poland; (M.M.); (J.L.)
| | - Bożena Karolewicz
- Department of Drug Forms Technology, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland;
| | - Artur Owczarek
- Department of Drug Forms Technology, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland;
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Visan AI, Cristescu R. Polysaccharide-Based Coatings as Drug Delivery Systems. Pharmaceutics 2023; 15:2227. [PMID: 37765196 PMCID: PMC10537422 DOI: 10.3390/pharmaceutics15092227] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/21/2023] [Accepted: 08/27/2023] [Indexed: 09/29/2023] Open
Abstract
Therapeutic polysaccharide-based coatings have recently emerged as versatile strategies to transform a conventional medical implant into a drug delivery system. However, the translation of these polysaccharide-based coatings into the clinic as drug delivery systems still requires a deeper understanding of their drug degradation/release profiles. This claim is supported by little or no data. In this review paper, a comprehensive description of the benefits and challenges generated by the polysaccharide-based coatings is provided. Moreover, the latest advances made towards the application of the most important representative coatings based on polysaccharide types for drug delivery are debated. Furthermore, suggestions/recommendations for future research to speed up the transition of polysaccharide-based drug delivery systems from the laboratory testing to clinical applications are given.
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Affiliation(s)
- Anita Ioana Visan
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Ilfov, Romania
| | - Rodica Cristescu
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Ilfov, Romania
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