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Nguyen HX, Kipping T, Banga AK. Polymeric Microneedles Enhance Transdermal Delivery of Therapeutics. Pharmaceutics 2024; 16:845. [PMID: 39065542 PMCID: PMC11280287 DOI: 10.3390/pharmaceutics16070845] [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: 05/20/2024] [Revised: 06/10/2024] [Accepted: 06/17/2024] [Indexed: 07/28/2024] Open
Abstract
This research presents the efficacy of polymeric microneedles in improving the transdermal permeation of methotrexate across human skin. These microneedles were fabricated from PLGA Expansorb® 50-2A and 50-8A and subjected to comprehensive characterization via scanning electron microscopy, Fourier-transform infrared spectroscopy, and mechanical analysis. We developed and assessed a methotrexate hydrogel for physicochemical and rheological properties. Dye binding, histological examinations, and assessments of skin integrity demonstrated the effective microporation of the skin by PLGA microneedles. We measured the dimensions of microchannels in the skin using scanning electron microscopy, pore uniformity analysis, and confocal microscopy. The skin permeation and disposition of methotrexate were researched in vitro. PLGA 50-8A microneedles appeared significantly longer, sharper, and more mechanically uniform than PLGA 50-2A needles. PLGA 50-8A needles generated substantially more microchannels, as well as deeper, larger, and more uniform channels in the skin than PLGA 50-2A needles. Microneedle insertion substantially reduced skin electrical resistance, accompanied by an elevation in transepidermal water loss values. PLGA 50-8A microneedle treatment provided a significantly higher cumulative delivery, flux, diffusion coefficient, permeability coefficient, and predicted steady-state plasma concentration; however, there was a shorter lag time than for PLGA 50-2A needles, base-treated, and untreated groups (p < 0.05). Conclusively, skin microporation using polymeric microneedles significantly improved the transdermal delivery of methotrexate.
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Affiliation(s)
- Hiep X. Nguyen
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
- Faculty of Pharmacy, Phenikaa University, Yen Nghia, Ha Dong, Hanoi 12116, Vietnam;
| | - Thomas Kipping
- MilliporeSigma, a Business of Merck KGaA, Frankfurter Strasse 250, 64293 Darmstadt, Germany
| | - Ajay K. Banga
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
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Futaki M, Inamura K, Nishimura T, Niitsu T, Tojo T, Sugibayashi K, Todo H. A Hollow Microneedle Equipped with a Micropillar for Improved Needle Insertion and Injection of Drug Solution. Pharm Res 2024; 41:819-831. [PMID: 38443630 DOI: 10.1007/s11095-024-03681-7] [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: 12/12/2023] [Accepted: 02/21/2024] [Indexed: 03/07/2024]
Abstract
PURPOSE Hollow-type microneedles (hMNs) are a promising device for the effective administration of drugs into intradermal sites. Complete insertion of the needle into the skin and administration of the drug solution without leakage must be achieved to obtain bioavailability or a constant effect. In the present study, several types of hMN with or without a rounded blunt tip micropillar, which suppresses skin deformation, around a hollow needle, and the effect on successful needle insertion and administration of a drug solution was investigated. Six different types of hMNs with needle lengths of 1000, 1300, and 1500 µm with or without a micropillar were used. METHODS Needle insertion and the disposition of a drug in rat skin were investigated. In addition, the displacement-force profile during application of hMNs was also investigated using a texture analyzer with an artificial membrane to examine needle factors affecting successful insertion and administration of a drug solution by comparing with in vivo results. RESULTS According to the results with the drug distribution of iodine, hMN1300 with a micropillar was able to successfully inject drug solution into an intradermal site with a high success rate. In addition, the results of displacement-force profiles with an artificial membrane showed that a micropillar can be effective for depth control of the injected solution as well as the prevention of contact between the hMN pedestal and the deformed membrane. CONCLUSION In the present study, hMN1300S showed effective solution delivery into an intradermal site. In particular, a micropillar can be effective for depth control of the injected solution as well as preventing contact between the hMN pedestal and the deformed membrane. The obtained results will help in the design and development of hMNs that ensure successful injection of an administered drug.
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Affiliation(s)
- Mika Futaki
- Graduate School of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama, 350-0295, Japan
| | - Kazuya Inamura
- Graduate School of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama, 350-0295, Japan
| | - Tomoya Nishimura
- Processing Development Research Lab., Kao Corp., 2606 Akabane, Ichikai-cho, Haga-gun, Tochigi, 321-3426, Japan
| | - Takatoshi Niitsu
- Processing Development Research Lab., Kao Corp., 2606 Akabane, Ichikai-cho, Haga-gun, Tochigi, 321-3426, Japan
| | - Takehiko Tojo
- Processing Development Research Lab., Kao Corp., 2606 Akabane, Ichikai-cho, Haga-gun, Tochigi, 321-3426, Japan
| | - Kenji Sugibayashi
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama, 350-0295, Japan
- Faculty of Pharmaceutical Sciences, Josai International University, 1 Gumyo, Togane, Chiba-ken, 283-8555, Japan
| | - Hiroaki Todo
- Graduate School of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama, 350-0295, Japan.
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Novo DC, Edgar KJ. Smart fluorescent polysaccharides: Recent developments and applications. Carbohydr Polym 2024; 324:121471. [PMID: 37985079 PMCID: PMC10661488 DOI: 10.1016/j.carbpol.2023.121471] [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: 05/29/2023] [Revised: 09/27/2023] [Accepted: 10/06/2023] [Indexed: 11/22/2023]
Abstract
Polysaccharides are ubiquitous, generally benign in nature, and compatible with many tissues in biomedical situations, making them appealing candidates for new materials such as therapeutic agents and sensors. Fluorescent labeling can create the ability to sensitively monitor distribution and transport of polysaccharide-based materials, which can for example further illuminate drug-delivery mechanisms and therefore improve design of delivery systems. Herein, we review fluorophore selection and ways of appending polysaccharides, utility of the product fluorescent polysaccharides as new smart materials, and their stimulus-responsive nature, with focus on their biomedical applications as environment-sensitive biosensors, imaging, and as molecular rulers. Further, we discuss the advantages and disadvantages of these methods, and future prospects for creation and use of these self-reporting materials.
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Affiliation(s)
- Diana C Novo
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA 24061, United States; Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
| | - Kevin J Edgar
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA 24061, United States; Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, United States; GlycoMIP, National Science Foundation Materials Innovation Platform, United States.
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4
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Demartis S, Rassu G, Mazzarello V, Larrañeta E, Hutton A, Donnelly RF, Dalpiaz A, Roldo M, Guillot AJ, Melero A, Giunchedi P, Gavini E. Delivering hydrosoluble compounds through the skin: what are the chances? Int J Pharm 2023; 646:123457. [PMID: 37788729 DOI: 10.1016/j.ijpharm.2023.123457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/19/2023] [Accepted: 09/27/2023] [Indexed: 10/05/2023]
Affiliation(s)
- S Demartis
- Department of Chemical, Mathematical, Natural and Physical Sciences, University of Sassari, Sassari 07100, Italy
| | - G Rassu
- Department of Medicine and Surgery, University of Sassari, Sassari 07100, Italy
| | - V Mazzarello
- Department of Medicine and Surgery, University of Sassari, Sassari 07100, Italy
| | - E Larrañeta
- School of Pharmacy, Queen's University, Belfast 97 Lisburn Road, Belfast BT9 7BL, UK
| | - A Hutton
- School of Pharmacy, Queen's University, Belfast 97 Lisburn Road, Belfast BT9 7BL, UK
| | - R F Donnelly
- School of Pharmacy, Queen's University, Belfast 97 Lisburn Road, Belfast BT9 7BL, UK
| | - A Dalpiaz
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Fossato di Mortara 19, I-44121 Ferrara, Italy
| | - M Roldo
- School of Pharmacy and Biomedical Sciences, St Michael's Building, White Swan Road, University of Portsmouth, Portsmouth PO1 2DT, UK
| | - A J Guillot
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, Faculty of Pharmacy, University of Valencia, Avda. Vincent Andrés Estellés s/n, 46100 Burjassot, Spain
| | - A Melero
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, Faculty of Pharmacy, University of Valencia, Avda. Vincent Andrés Estellés s/n, 46100 Burjassot, Spain
| | - P Giunchedi
- Department of Medicine and Surgery, University of Sassari, Sassari 07100, Italy
| | - E Gavini
- Department of Medicine and Surgery, University of Sassari, Sassari 07100, Italy.
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Filho D, Guerrero M, Pariguana M, Marican A, Durán-Lara EF. Hydrogel-Based Microneedle as a Drug Delivery System. Pharmaceutics 2023; 15:2444. [PMID: 37896204 PMCID: PMC10609870 DOI: 10.3390/pharmaceutics15102444] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/20/2023] [Accepted: 10/04/2023] [Indexed: 10/29/2023] Open
Abstract
The skin is considered the largest and most accessible organ in the human body, and allows the use of noninvasive and efficient strategies for drug administration, such as the transdermal drug delivery system (TDDS). TDDSs are systems or patches, with the ability and purpose to deliver effective and therapeutic doses of drugs through the skin. Regarding the specific interaction between hydrogels (HG) and microneedles (MNs), we seek to find out how this combination would be applied in the context of drug delivery, and we detail some possible advantages of the methods used. Depending on the components belonging to the HG matrix, we can obtain some essential characteristics that make the combination of hydrogels-microneedles (HG-MNs) very advantageous, such as the response to external stimuli, among others. Based on multiple characteristics provided by HGMNs that are depicted in this work, it is possible to obtain unique properties that include controlled, sustained, and localized drug release, as well as the possibility of a synergistic association between the components of the formulation and the combination of more than one bioactive component. In conclusion, a system based on HG-MNs can offer many advantages in the biomedical field, bringing to light a new technological and safe system for improving the pharmacokinetics and pharmacodynamics of drugs and new treatment perspectives.
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Affiliation(s)
- David Filho
- Laboratory of Bio & Nano Materials, Drug Delivery and Controlled Release, Department of Microbiology, Faculty of Health Sciences, University of Talca, Talca 3460000, Chile
- Center for Nanomedicine, Diagnostic & Drug Development (ND3), University of Talca, Talca 3460000, Chile
| | - Marcelo Guerrero
- Laboratory of Bio & Nano Materials, Drug Delivery and Controlled Release, Department of Microbiology, Faculty of Health Sciences, University of Talca, Talca 3460000, Chile
- Center for Nanomedicine, Diagnostic & Drug Development (ND3), University of Talca, Talca 3460000, Chile
| | - Manuel Pariguana
- Laboratory of Bio & Nano Materials, Drug Delivery and Controlled Release, Department of Microbiology, Faculty of Health Sciences, University of Talca, Talca 3460000, Chile
- Center for Nanomedicine, Diagnostic & Drug Development (ND3), University of Talca, Talca 3460000, Chile
| | - Adolfo Marican
- Laboratory of Bio & Nano Materials, Drug Delivery and Controlled Release, Department of Microbiology, Faculty of Health Sciences, University of Talca, Talca 3460000, Chile
- Center for Nanomedicine, Diagnostic & Drug Development (ND3), University of Talca, Talca 3460000, Chile
- Institute of Chemistry of Natural Research, University of Talca, Talca 3460000, Chile
| | - Esteban F Durán-Lara
- Laboratory of Bio & Nano Materials, Drug Delivery and Controlled Release, Department of Microbiology, Faculty of Health Sciences, University of Talca, Talca 3460000, Chile
- Center for Nanomedicine, Diagnostic & Drug Development (ND3), University of Talca, Talca 3460000, Chile
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Malek-Khatabi A, Sadat Razavi M, Abdollahi A, Rahimzadeghan M, Moammeri F, Sheikhi M, Tavakoli M, Rad-Malekshahi M, Faraji Rad Z. Recent progress in PLGA-based microneedle-mediated transdermal drug and vaccine delivery. Biomater Sci 2023; 11:5390-5409. [PMID: 37387317 DOI: 10.1039/d3bm00795b] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
Microneedles (MNs) have recently been found to have applications in drug, vitamin, protein and vaccine delivery. Polymeric MN arrays continue to attract increasing attention due to their capability to bypass the skin's stratum corneum (SC) barrier with minimal invasiveness. These carriers can achieve the targeted intradermal delivery of drugs and vaccines and improve their transdermal delivery level. As a nontoxic FDA-approved copolymer, polylactic glycolic acid (PLGA) has good biocompatibility and biodegradability. Currently, PLGA-based MNs have a noticeable tendency to be utilized as a delivery system. This study focuses on the most recent advances in PLGA-based MNs. Both PLGA nanoparticle-based MNs and PLGA matrix-based MNs, created for the delivery of vaccines, drugs, proteins and other therapeutic agents, are discussed. The paper also discusses the various types of MNs and their potential applications. Finally, the prospects and challenges of PLGA-based MNs are reviewed.
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Affiliation(s)
- Atefeh Malek-Khatabi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Malihe Sadat Razavi
- Department of Pharmaceutics, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Alyeh Abdollahi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Milad Rahimzadeghan
- Functional Neurosurgery Research Center, Shohada Tajrish Comprehensive Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Moammeri
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mojgan Sheikhi
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohamadreza Tavakoli
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mazda Rad-Malekshahi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Faraji Rad
- School of Engineering, University of Southern Queensland, Springfield, QLD 4300, Australia.
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de Jesús Martín-Camacho U, Rodríguez-Barajas N, Alberto Sánchez-Burgos J, Pérez-Larios A. Weibull β value for the discernment of drug release mechanism of PLGA particles. Int J Pharm 2023; 640:123017. [PMID: 37149112 DOI: 10.1016/j.ijpharm.2023.123017] [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: 01/26/2023] [Revised: 04/27/2023] [Accepted: 04/30/2023] [Indexed: 05/08/2023]
Abstract
Mathematical models are used to characterize and optimize drug release in drug delivery systems (DDS). One of the most widely used DDS is the poly(lactic-co-glycolic acid) (PLGA)-based polymeric matrix owing to its biodegradability, biocompatibility, and easy manipulation of its properties through the manipulation of synthesis processes. Over the years, the Korsmeyer-Peppas model has been the most widely used model for characterizing the release profiles of PLGA DDS. However, owing to the limitations of the Korsmeyer-Peppas model, the Weibull model has emerged as an alternative for the characterization of the release profiles of PLGA polymeric matrices. The purpose of this study was to establish a correlation between the n and β parameters of the Korsmeyer-Peppas and Weibull models and to use the Weibull model to discern the drug release mechanism. A total of 451 datasets describing the overtime drug release of PLGA-based formulations from 173 scientific articles were fitted to both models. The Korsmeyer-Peppas model had a mean Akaike Information Criteria (AIC) value of 54.52 and an n value of 0.42, while the Weibull model had a mean AIC of 51.99 and a β value of 0.55, and by using reduced major axis regression values, a high correlation was found between the n and β values. These results demonstrate the ability of the Weibull model to characterize the release profiles of PLGA-based matrices and the usefulness of the β parameter for determining the drug release mechanism.
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Affiliation(s)
- Ubaldo de Jesús Martín-Camacho
- Laboratorio de Investigación en Materiales, Agua y Energía, Departamento de Ingeniería, Centro Universitario de los Altos, Universidad de Guadalajara, Tepatitlán de Morelos, Jal., México, 47600
| | - Noé Rodríguez-Barajas
- Laboratorio de Investigación en Materiales, Agua y Energía, Departamento de Ingeniería, Centro Universitario de los Altos, Universidad de Guadalajara, Tepatitlán de Morelos, Jal., México, 47600
| | | | - Alejandro Pérez-Larios
- Laboratorio de Investigación en Materiales, Agua y Energía, Departamento de Ingeniería, Centro Universitario de los Altos, Universidad de Guadalajara, Tepatitlán de Morelos, Jal., México, 47600.
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8
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Nguyen HX, Nguyen CN. Microneedle-Mediated Transdermal Delivery of Biopharmaceuticals. Pharmaceutics 2023; 15:pharmaceutics15010277. [PMID: 36678906 PMCID: PMC9864466 DOI: 10.3390/pharmaceutics15010277] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Transdermal delivery provides numerous benefits over conventional routes of administration. However, this strategy is generally limited to a few molecules with specific physicochemical properties (low molecular weight, high potency, and moderate lipophilicity) due to the barrier function of the stratum corneum layer. Researchers have developed several physical enhancement techniques to expand the applications of the transdermal field; among these, microneedle technology has recently emerged as a promising platform to deliver therapeutic agents of any size into and across the skin. Typically, hydrophilic biomolecules cannot penetrate the skin by passive diffusion. Microneedle insertion disrupts skin integrity and compromises its protective function, thus creating pathways (microchannels) for enhanced permeation of macromolecules. Microneedles not only improve stability but also enhance skin delivery of various biomolecules. Academic institutions and industrial companies have invested substantial resources in the development of microneedle systems for biopharmaceutical delivery. This review article summarizes the most recent research to provide a comprehensive discussion about microneedle-mediated delivery of macromolecules, covering various topics from the introduction of the skin, transdermal delivery, microneedles, and biopharmaceuticals (current status, conventional administration, and stability issues), to different microneedle types, clinical trials, safety and acceptability of microneedles, manufacturing and regulatory issues, and the future of microneedle technology.
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Affiliation(s)
- Hiep X. Nguyen
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
- Correspondence: ; Tel.: +1-404-820-4015
| | - Chien N. Nguyen
- National Institute of Pharmaceutical Technology, Hanoi University of Pharmacy, Hanoi 100000, Vietnam
- Faculty of Pharmaceutics and Pharmaceutical Technology, Hanoi University of Pharmacy, Hanoi 100000, Vietnam
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Kshirsagar SM, Kipping T, Banga AK. Fabrication of Polymeric Microneedles using Novel Vacuum Compression Molding Technique for Transdermal Drug Delivery. Pharm Res 2022; 39:3301-3315. [PMID: 36195823 DOI: 10.1007/s11095-022-03406-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 09/28/2022] [Indexed: 12/27/2022]
Abstract
PURPOSE To demonstrate the feasibility of vacuum compression molding as a novel technique for fabricating polymeric poly (D, L-lactic-co-glycolic acid) microneedles. METHODS First, polydimethylsiloxane molds were prepared using metal microneedle templates and fixed in the MeltPrep® Vacuum Compression Molding tool. Poly (D, L-lactic-co-glycolic acid) (EXPANSORB® DLG 50-5A) was added, enclosed, and heated at 130°C for 15 min under a vacuum of -15 psi, cooled with compressed air for 15 min, followed by freezing at -20°C for 30 min, and stored in a desiccator. The microneedles and microchannels were characterized by a variety of imaging techniques. In vitro permeation of model drug lidocaine as base and hydrochloride salt was demonstrated across intact and microporated dermatomed human skin. RESULTS Fabricated PLGA microneedles were pyramid-shaped, sharp, uniform, and mechanically robust. Scanning electron microscopy, skin integrity, dye-binding, histology, and confocal laser microscopy studies confirmed the microchannel formation. The receptor delivery of lidocaine salt increased significantly in microporated (270.57 ± 3.73 μg/cm2) skin as compared to intact skin (142.19 ± 13.70 μg/cm2) at 24 h. The receptor delivery of lidocaine base from microporated skin was significantly higher (312.37 ± 10.57 μg/cm2) than intact skin (169.68 ± 24.09 μg/cm2) up to 8 h. Lag time decreased significantly for the base (2.24 ± 0.17 h to 0.64 ± 0.05 h) and salt (4.76 ± 0.31 h to 1.47 ± 0.21 h) after microporation. CONCLUSION Vacuum compression molding was demonstrated as a novel technique to fabricate uniform, solvent-free, strong polymer microneedles in a short time.
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Affiliation(s)
- Sharvari M Kshirsagar
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, 3001 Mercer University Drive, Atlanta, GA, 30341, USA
| | - Thomas Kipping
- MilliporeSigma a Business of Merck KGaA, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Ajay K Banga
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, 3001 Mercer University Drive, Atlanta, GA, 30341, USA.
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Natural polysaccharide-based biodegradable polymeric platforms for transdermal drug delivery system: a critical analysis. Drug Deliv Transl Res 2022; 12:2649-2666. [PMID: 35499715 DOI: 10.1007/s13346-022-01152-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/21/2022] [Indexed: 12/15/2022]
Abstract
Natural biodegradable polymers generally include polysaccharides (starch, alginate, chitin/chitosan, hyaluronic acid derivatives, etc.) and proteins (collagen, gelatin, fibrin, etc.). In transdermal drug delivery systems (TDDS), these polymers play a vital role in controlling the device's drug release. It is possible that natural polymers can be used for TDDS to attain predetermined drug delivery rates due to their physicochemical properties. These polymers can be employed to market products and scale production because they are readily available and inexpensive. As a result of these polymers, new pharmaceutical delivery systems can be developed that is both regulated and targeted. The focus of this article is the application of a biodegradable polymeric platform based on natural polymers for TDDS. Due to their biocompatibility and biodegradability, natural biodegradable polymers are frequently used in biomedical applications. Additionally, these natural biodegradable polymers are being studied for their characteristics and behaviors.
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11
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Potential of Microneedle Systems for COVID-19 Vaccination: Current Trends and Challenges. Pharmaceutics 2022; 14:pharmaceutics14051066. [PMID: 35631652 PMCID: PMC9144974 DOI: 10.3390/pharmaceutics14051066] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/27/2022] [Accepted: 05/09/2022] [Indexed: 12/12/2022] Open
Abstract
To prevent the coronavirus disease 2019 (COVID-19) pandemic and aid restoration to prepandemic normality, global mass vaccination is urgently needed. Inducing herd immunity through mass vaccination has proven to be a highly effective strategy for preventing the spread of many infectious diseases, which protects the most vulnerable population groups that are unable to develop immunity, such as people with immunodeficiencies or weakened immune systems due to underlying medical or debilitating conditions. In achieving global outreach, the maintenance of the vaccine potency, transportation, and needle waste generation become major issues. Moreover, needle phobia and vaccine hesitancy act as hurdles to successful mass vaccination. The use of dissolvable microneedles for COVID-19 vaccination could act as a major paradigm shift in attaining the desired goal to vaccinate billions in the shortest time possible. In addressing these points, we discuss the potential of the use of dissolvable microneedles for COVID-19 vaccination based on the current literature.
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Wang Y, Ma G, Gao G, Tao J, Cao W, Sun H, Ma F, Zhang Y, Wei Y, Tian M. Bioimaging of Dissolvable Microneedle Arrays: Challenges and Opportunities. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9758491. [PMID: 36034102 PMCID: PMC9368514 DOI: 10.34133/2022/9758491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 06/10/2022] [Indexed: 11/29/2022]
Abstract
The emergence of microneedle arrays (MNAs) as a novel, simple, and minimally invasive administration approach largely addresses the challenges of traditional drug delivery. In particular, the dissolvable MNAs act as a promising, multifarious, and well-controlled platform for micro-nanotransport in medical research and cosmetic formulation applications. The effective delivery mostly depends on the behavior of the MNAs penetrated into the body, and accurate assessment is urgently needed. Advanced imaging technologies offer high sensitivity and resolution visualization of cross-scale, multidimensional, and multiparameter information, which can be used as an important aid for the evaluation and development of new MNAs. The combination of MNA technology and imaging can generate considerable new knowledge in a cost-effective manner with regards to the pharmacokinetics and bioavailability of active substances for the treatment of various diseases. In addition, noninvasive imaging techniques allow rapid, receptive assessment of transdermal penetration and drug deposition in various tissues, which could greatly facilitate the translation of experimental MNAs into clinical application. Relying on the recent promising development of bioimaging, this review is aimed at summarizing the current status, challenges, and future perspective on in vivo assessment of MNA drug delivery by various imaging technologies.
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Affiliation(s)
- Yanni Wang
- Laboratory of Biologics and Biomaterials, College of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China
| | - Gehua Ma
- College of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China
| | - Guangzhi Gao
- Laboratory of Biologics and Biomaterials, College of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ji Tao
- Human Phenome Institute, Fudan University, Shanghai 201203, China
| | - Wenzhao Cao
- Human Phenome Institute, Fudan University, Shanghai 201203, China
| | - Haohao Sun
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Fengsen Ma
- Laboratory of Biologics and Biomaterials, College of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China
- Life Science Research Center, Frontier Crossing Institute, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yilong Zhang
- Engineering Research Center of Intelligent Sensing and System, Ministry of Education, Hangzhou 310023, China
- College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yen Wei
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 100084, China
| | - Mei Tian
- Human Phenome Institute, Fudan University, Shanghai 201203, China
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