201
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Krajišnik D, Ilić T, Nikolić I, Savić S. Established and advanced adjuvants in vaccines' formulation: Mineral adsorbents, nanoparticulate carriers and microneedle delivery systems. ARHIV ZA FARMACIJU 2019. [DOI: 10.5937/arhfarm1906420k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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202
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Assessment of mechanical stability of rapidly separating microneedles for transdermal drug delivery. Drug Deliv Transl Res 2018; 8:1034-1042. [PMID: 29845379 DOI: 10.1007/s13346-018-0547-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The rapidly separating microneedles (RS-PP-MNs), composed of PVA (separable arrow head) MNs and a poly(L-lactide-co-D, L-lactide) (PLA) supporting array, are used for transdermal delivery system at high humidity. The fabricated RS-PP-MNs should have sufficient mechanical strength at different humidity. In general, the water adsorption rate was increased with increasing humidity; by contrast, storage time was decreased with increasing humidity. The higher water adsorption rate indicated the lower mechanical strength, thereby lowering drug delivery efficiency. The prepared RS-PP-MNs could be successfully inserted within the skin at high humid atmosphere due to PLA supporting array. The bright field and fluorescence microscopic images suggested the probable real-time applicability of RS-PP-MNs. The in vitro and in vivo assay suggested that RS-PP-MNs potentially were able to deliver the drugs at high humidity condition. The significant improvement in the drug delivery efficiency and skin penetration ability was observed compared with the traditional MNs. In addition, the fabrication of RS-PP-MNs is facile and scalable. Therefore, the prepared RS-PP-MNs with supporting solid PLA array might be advantageous in real-time applications. This study is of great importance for the MN field as it offers more theoretical support for clinical applications.
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203
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Ribet F, Stemme G, Roxhed N. Real-time intradermal continuous glucose monitoring using a minimally invasive microneedle-based system. Biomed Microdevices 2018; 20:101. [PMID: 30523421 PMCID: PMC6290652 DOI: 10.1007/s10544-018-0349-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Continuous glucose monitoring (CGM) has the potential to greatly improve diabetes management. The aim of this work is to show a proof-of-concept CGM device which performs minimally invasive and minimally delayed in-situ glucose sensing in the dermal interstitial fluid, combining the advantages of microneedle-based and commercially available CGM systems. The device is based on the integration of an ultra-miniaturized electrochemical sensing probe in the lumen of a single hollow microneedle, separately realized using standard silicon microfabrication methods. By placing the sensing electrodes inside the lumen facing an opening towards the dermal space, real-time measurement purely can be performed relying on molecular diffusion over a short distance. Furthermore, the device relies only on passive capillary lumen filling without the need for complex fluid extraction mechanisms. Importantly, the transdermal portion of the device is 50 times smaller than that of commercial products. This allows access to the dermis and simultaneously reduces tissue trauma, along with being virtually painless during insertion. The three-electrode enzymatic sensor alone was previously proven to have satisfactory sensitivity (1.5 nA/mM), linearity (up to 14 mM), selectivity, and long-term stability (up to 4 days) in-vitro. In this work we combine this sensor technology with microneedles for reliable insertion in forearm skin. In-vivo human tests showed the possibility to correctly and dynamically track glycaemia over time, with approximately 10 min delay with respect to capillary blood control values, in line with the expected physiological lag time. The proposed device can thus reduce discomfort and potentially enable less invasive real-time CGM in diabetic patients.
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Affiliation(s)
- Federico Ribet
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
| | - Göran Stemme
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - Niclas Roxhed
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
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204
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Ilić T, Savić S, Batinić B, Marković B, Schmidberger M, Lunter D, Savić M, Savić S. Combined use of biocompatible nanoemulsions and solid microneedles to improve transport of a model NSAID across the skin: In vitro and in vivo studies. Eur J Pharm Sci 2018; 125:110-119. [DOI: 10.1016/j.ejps.2018.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/08/2018] [Accepted: 09/30/2018] [Indexed: 12/23/2022]
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205
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Babity S, Roohnikan M, Brambilla D. Advances in the Design of Transdermal Microneedles for Diagnostic and Monitoring Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803186. [PMID: 30353663 DOI: 10.1002/smll.201803186] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 09/28/2018] [Indexed: 06/08/2023]
Abstract
Due to their intrinsic advantages over classical hypodermic needles, microneedles have received much attention over the last two decades and will likely soon appear in clinics. Although the vast majority of research is focused on designing microneedles for the painless delivery of drugs, their applications for diagnostic purposes have also provided promising results. In this paper, the main advances in the field of microneedles for diagnostic and patient monitoring purposes are introduced and critically discussed.
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Affiliation(s)
- Samuel Babity
- Faculty of Pharmacy, University of Montreal, Montreal, QC, H3T 1J4, Canada
| | - Mahdi Roohnikan
- Faculty of Pharmacy, University of Montreal, Montreal, QC, H3T 1J4, Canada
| | - Davide Brambilla
- Faculty of Pharmacy, University of Montreal, Montreal, QC, H3T 1J4, Canada
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206
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Li J, Zhou Y, Yang J, Ye R, Gao J, Ren L, Liu B, Liang L, Jiang L. Fabrication of gradient porous microneedle array by modified hot embossing for transdermal drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 96:576-582. [PMID: 30606567 DOI: 10.1016/j.msec.2018.11.074] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 11/25/2018] [Accepted: 11/28/2018] [Indexed: 02/04/2023]
Abstract
A gradient porous microneedle array (GPMA) is developed for transdermal drug delivery. A modified hot embossing approach is proposed to fabricate the GPMA from poly (lactic-co-glycolic acid) powders within a cavity array mold under the coupling combination of gradient thermal and pressure multi-fields. The porosity of the microneedles is a gradient, and the pores are mainly distributed in the tip region. The liquid drug formulation can directly be loaded in the pores of the microneedle tips by dipping. GPMA could penetrate into the rabbit skin without breakage and the penetration force per microneedle is approximately 22 mN. The GPMA can diffuse a dry model drug, namely Rhodamine B, in vitro in the rabbit skin dermis. The GPMA can also effectively deliver an insulin solution in vivo in diabetes rats, lowering the blood glucose levels. Above all, as a dry or liquid drug carrier and a minimally invasive injector, the GPMA offers an effective alternative for transdermal drug delivery.
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Affiliation(s)
- Jiyu Li
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China; Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China
| | - Yingying Zhou
- Department of Biomedical Engineering, Hong Kong Polytechnic University, Hong Kong, China
| | - Jingbo Yang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Rui Ye
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Jie Gao
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Lei Ren
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Bin Liu
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Liang Liang
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, PR China
| | - Lelun Jiang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China.
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207
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Leone M, Priester MI, Romeijn S, Nejadnik MR, Mönkäre J, O'Mahony C, Jiskoot W, Kersten G, Bouwstra JA. Hyaluronan-based dissolving microneedles with high antigen content for intradermal vaccination: Formulation, physicochemical characterization and immunogenicity assessment. Eur J Pharm Biopharm 2018; 134:49-59. [PMID: 30453025 DOI: 10.1016/j.ejpb.2018.11.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/15/2018] [Accepted: 11/15/2018] [Indexed: 02/06/2023]
Abstract
The purpose of this study was to optimize the manufacturing of dissolving microneedles (dMNs) and to increase the antigen loading in dMNs to investigate the effect on their physicochemical properties. To achieve this, a novel single-array wells polydimethylsiloxane mold was designed, minimizing antigen wastage during fabrication and achieving homogeneous antigen distribution among the dMN arrays. Using this mold, hyaluronan (HA)-based dMNs were fabricated and tested for maximal ovalbumin (OVA) content. dMNs could be fabricated with an OVA:HA ratio as high as 1:1 (w/w), without compromising their properties such as shape and penetration into the ex vivo human skin, even after storage at high humidity and temperature. High antigen loading did not induce protein aggregation during dMN fabrication as demonstrated by complementary analytical methods. However, the dissolution rate in ex vivo human skin decreased with increasing antigen loading. About 2.7 µg OVA could be delivered in mice by using a single array with an OVA:HA ratio of 1:3 (w/w). Intradermal vaccination with dMNs induced an immune response similar as subcutaneous injection and faster than after hollow microneedle injection. In conclusion, results suggest that (i) the polydimethylsiloxane mold design has an impact on the manufacturing of dMNs, (ii) the increase in antigen loading in dMNs affects the microneedle dissolution and (iii) dMNs are a valid alternative for vaccine administration over conventional injection.
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Affiliation(s)
- Mara Leone
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Marjolein I Priester
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Stefan Romeijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - M Reza Nejadnik
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Juha Mönkäre
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Conor O'Mahony
- Tyndall National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Wim Jiskoot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Gideon Kersten
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands; Institute for Translational Vaccinology (Intravacc), Antonie van Leeuwenhoeklaan 9, 3721MA Bilthoven, the Netherlands
| | - Joke A Bouwstra
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, the Netherlands.
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208
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Universal Applicator for Digitally-Controlled Pressing Force and Impact Velocity Insertion of Microneedles into Skin. Pharmaceutics 2018; 10:pharmaceutics10040211. [PMID: 30388786 PMCID: PMC6321443 DOI: 10.3390/pharmaceutics10040211] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 10/26/2018] [Accepted: 10/28/2018] [Indexed: 11/17/2022] Open
Abstract
Microneedle technologies have been developed for dermal drug and vaccine delivery, including hollow-, solid-, coated-, and dissolving microneedles. Microneedles have been made in many different geometries and of many different materials, all of which may influence their skin-penetrating ability. To ensure reproducible and effective drug and vaccine delivery via microneedles, the optimal insertion parameters should be known. Therefore, a digitally-controlled microneedle applicator was developed to insert microneedles into the skin via impact insertion (velocity) or via pressing force insertion. Six microneedle arrays with different geometries and/or materials were applied onto ex vivo human skin with varying velocities or pressing forces. Penetration efficiency and delivered antigen dose into the skin after application of microneedles were determined. In general, microneedles pierced the skin more efficiently when applied by impact application as compared to application via pressing force. However, the angle of application of the applicator on the skin can affect the velocity of the impact, influencing the penetration efficiency of microneedles. Regarding the antigen delivery into the skin, the delivered dose was increasing by increasing the velocity or pressure, and thus, increasing the penetration efficiency. These data demonstrate that an applicator is an important tool to determine optimal application conditions with ex vivo human skin.
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209
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Yang J, Chen Z, Ye R, Li J, Lin Y, Gao J, Ren L, Liu B, Jiang L. Touch-actuated microneedle array patch for closed-loop transdermal drug delivery. Drug Deliv 2018; 25:1728-1739. [PMID: 30182757 PMCID: PMC6127806 DOI: 10.1080/10717544.2018.1507060] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 07/19/2018] [Accepted: 07/29/2018] [Indexed: 11/05/2022] Open
Abstract
To date, only approximately 20 drugs synthesized with small molecules have been approved by the FDA for use in traditional transdermal patches (TTP) owing to the extremely low permeation rate of the skin barrier for macromolecular drugs. A novel touch-actuated microneedle array patch (TMAP) was developed for transdermal delivery of liquid macromolecular drugs. TMAP is a combination of a typical TTP and a solid microneedle array (MA). High doses of liquid drug formulations, especially heat-sensitive compounds can be easily filled and stored in the drug reservoir of TMAPs. TMAP can easily penetrate the skin and automatically retract from it to create microchannels through the stratum corneum (SC) layer using touch-actuated 'press and release' actions for passive permeation of liquid drugs. Comparison of subcutaneous injection, TTP, solid MA, and dissolvable MA, indicated that insulin-loaded TMAP exhibited the best hypoglycemic effect on type 1 diabetic rats. A 'closed-loop' permeation control was also provided for on-demand insulin delivery based on feedback of blood glucose levels (BGLs). Twenty IU-insulin-loaded TMAP maintained the type 1 diabetic rats in a normoglycemic state for approximately 11.63 h, the longest therapeutic duration among all previously reported results on microneedle-based transdermal patches. TMAP possesses excellent transdermal drug delivery capabilities.
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Affiliation(s)
- Jingbo Yang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Zhipeng Chen
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Rui Ye
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Jiyu Li
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, PR China
| | - Yinyan Lin
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Jie Gao
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Lei Ren
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Bin Liu
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
| | - Lelun Jiang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, PR China
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210
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Takeuchi K, Kim B. Functionalized microneedles for continuous glucose monitoring. NANO CONVERGENCE 2018; 5:28. [PMID: 30467645 PMCID: PMC6199201 DOI: 10.1186/s40580-018-0161-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 09/26/2018] [Indexed: 05/23/2023]
Abstract
Microneedles (MNs) have been established as promising medical devices as they are minimally invasive, cause less pain, and can be utilized for self-administration of drugs by patients. There has been rapid development in MNs for transdermal monitoring and diagnostic systems, following the active research on fabrication methods and applications for drug delivery. In this paper, recent investigations on bio-sensing using MNs are reviewed in terms of the applicability to continuous glucose monitoring system (CGMS), which is one of the main research focuses of medical engineering technologies. The trend of the functionalized MNs can be categorized as follows: (i) as a sensing probe, and (ii) as a biological fluid collector. MNs as in vivo sensors are mainly integrated or coated with conductive materials to have the function as electrodes. MNs as fluid collectors are given a certain geometrical design, such as a hollow and porous structure aided by a capillary action or negative pressure, to extract the interstitial fluids or blood for ex vivo analysis. For realization of CGMS with MNs, a long-term accurate measurement by the MN-based sensing probe or a fluidic connection between the MN-based fluid collector and the existing microfluidic measurement systems should be investigated.
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Affiliation(s)
- Kai Takeuchi
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505 Japan
| | - Beomjoon Kim
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505 Japan
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211
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He Y, Hong C, Li J, Howard MT, Li Y, Turvey ME, Uppu DSSM, Martin JR, Zhang K, Irvine DJ, Hammond PT. Synthetic Charge-Invertible Polymer for Rapid and Complete Implantation of Layer-by-Layer Microneedle Drug Films for Enhanced Transdermal Vaccination. ACS NANO 2018; 12:10272-10280. [PMID: 30272942 PMCID: PMC6501205 DOI: 10.1021/acsnano.8b05373] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The utility of layer-by-layer (LbL) coated microneedle (MN) skin patches for transdermal drug delivery has proven to be a promising approach, with advantages over hypodermal injection due to painless and easy self-administration. However, the long epidermal application time required for drug implantation by existing LbL MN strategies (15-90 min) can lead to potential medication noncompliance. Here, we developed a MN platform to shorten the application time in MN therapies based on a synthetic pH-induced charge-invertible polymer poly(2-(diisopropylamino) ethyl methacrylate- b-methacrylic acid) (PDM), requiring only 1 min skin insertion time to implant LbL films in vivo. Following MN-mediated delivery of 0.5 μg model antigen chicken ovalbumin (OVA) in the skin of mice, this system achieved sustained release over 3 days and led to an elevated immune response as demonstrated by significantly higher humoral immunity compared with OVA administration via conventional routes (subcutaneously and intramuscularly). Moreover, in an ex vivo experiment on human skin, we achieved efficient immune activation through MN-delivered LbL films, demonstrated by a rapid uptake of vaccine adjuvants by the antigen presenting cells. These features, rapid administration and the ability to elicit a robust immune response, can potentially enable a broad application of microneedle-based vaccination technologies.
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Affiliation(s)
- Yanpu He
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Celestine Hong
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Jiahe Li
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - MayLin T Howard
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Yingzhong Li
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Michelle E Turvey
- Infectious Diseases Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), Singapore, Singapore
| | - Divakara SSM Uppu
- Infectious Diseases Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), Singapore, Singapore
| | - John R Martin
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Ketian Zhang
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Darrell J Irvine
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Howard Hughes Medical Institute, Chevy Chase, Maryland 20815, United States
| | - Paula T Hammond
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
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212
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Cahill EM, Keaveney S, Stuettgen V, Eberts P, Ramos-Luna P, Zhang N, Dangol M, O'Cearbhaill ED. Metallic microneedles with interconnected porosity: A scalable platform for biosensing and drug delivery. Acta Biomater 2018; 80:401-411. [PMID: 30201432 DOI: 10.1016/j.actbio.2018.09.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 09/01/2018] [Accepted: 09/06/2018] [Indexed: 02/01/2023]
Abstract
Metallic-based microneedles (MNs) offer a robust platform for minimally invasive drug delivery and biosensing applications due to their mechanical strength and proven tissue and drug compatibility. However, current designs suffer from limited functional surface area or challenges in manufacturing scalability. Here, porous 316L stainless steel MN patches are proposed. Fabricated through a scalable manufacturing process, they are suitable for storage and delivery of drugs and rapid absorption of fluids for biosensing. Fabrication of these MNs involves hot embossing a patch of stainless steel-based feedstock, sintering at 1100 °C and subsequent electropolishing. Optimisation of this manufacturing process yields devices that maintain mechanical integrity yet possess high surface area and associated porosity (36%) to maximise loading capacity. Similarly, a small pore size has been targeted (average diameter 2.22 μm, with 90% between 1.56 μm and 2.93 μm) to maximise capillarity and loading efficiency. This porous network has a theoretical wicking rate of 4.7 μl/s and can wick-up 27 ± 5 μl of fluid through capillary action which allows for absorption of pharmaceuticals for delivery. When inserted into a metabolite-loaded skin model, the MNs absorbed and recovered 17 ± 3 μl of the metabolite solution. The drug delivery performance of the porous metallic MNs (22.4 ± 4.9 µg/cm2) was found to be threefold higher than that of topical administration (7.1 ± 4.3 µg/cm2). The porous metallic MN patches have been shown to insert into porcine skin under a 19 N load. These results indicate the potential of design-for-manufacturing porous stainless steel MNs in biosensing and drug delivery applications. STATEMENT OF SIGNIFICANCE: Microneedles are micro-scale sharp protrusions used to bypass the stratum corneum, the skin's outer protective layer, and painlessly access dermal layers suitable for drug delivery and biosensing. Despite a depth of research in the area we have not yet seen large-scale clinical adoption of microneedle devices. Here we describe a device designed to address the potential barriers to adoption seen by other microneedles devices. We have developed a scalable, cost effective process to produce medical grade stainless steel microneedle patches which passively absorb and store drugs or interstitial fluid though a porous network and capillary action. This device, with low manufacturing and regulatory burdens may help the large-scale adoption of microneedles.
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Affiliation(s)
- Ellen M Cahill
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Shane Keaveney
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Vivien Stuettgen
- UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland; UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Paulina Eberts
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland; Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Pamela Ramos-Luna
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Nan Zhang
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Manita Dangol
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Eoin D O'Cearbhaill
- UCD Centre for Biomedical Engineering, School of Mechanical and Materials Engineering, University College Dublin, Belfield, Dublin 4, Ireland; UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
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213
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Hyperhidrose – Ätiopathogenese, Diagnostik, Klinik und Therapie. Hautarzt 2018; 69:857-869. [DOI: 10.1007/s00105-018-4265-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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214
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Insertion-responsive microneedles for rapid intradermal delivery of canine influenza vaccine. J Control Release 2018; 286:460-466. [DOI: 10.1016/j.jconrel.2018.08.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/22/2018] [Accepted: 08/10/2018] [Indexed: 11/17/2022]
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215
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Perez Cuevas MB, Kodani M, Choi Y, Joyce J, O'Connor SM, Kamili S, Prausnitz MR. Hepatitis B vaccination using a dissolvable microneedle patch is immunogenic in mice and rhesus macaques. Bioeng Transl Med 2018; 3:186-196. [PMID: 30377659 PMCID: PMC6195907 DOI: 10.1002/btm2.10098] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 05/29/2018] [Accepted: 06/01/2018] [Indexed: 01/18/2023] Open
Abstract
Chronic Hepatitis B virus infection remains a major global public health problem, accounting for about 887,000 deaths in 2015. Perinatal and early childhood infections are strongly associated with developing chronic hepatitis B. Adding a birth dose of the hepatitis B vaccine (HepB BD) to routine childhood vaccination can prevent over 85% of these infections. However, HepB BD coverage remains low in many global regions, with shortages of birth attendants trained to vaccinate and limited HepB BD supply at birth. To address the challenges, we developed coated metal microneedle patches (cMNPs) and dissolvable microneedle patches (dMNPs) that deliver adjuvant‐free hepatitis B vaccine to the skin in a simple‐to‐administer manner. The dMNP contains micron‐scale, solid needles encapsulating vaccine antigen and dissolve in the skin, generating no sharps waste. We delivered HepB BD via cMNP to BALB/c mice and via dMNP to both mice and rhesus macaques. Both cMNP and dMNP were immunogenic, generating hepatitis B surface antibody levels similar to human seroprotection. Biomechanical analysis showed that at high forces the microneedles failed mechanically by yielding but microneedles partially blunted by axial compression were still able to penetrate skin. Overall, this study indicates that with further development, dMNPs could offer a method of vaccination to increase HepB BD access and reduce needle waste in developing countries.
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Affiliation(s)
- Monica B Perez Cuevas
- School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332
| | - Maja Kodani
- Division of Viral Hepatitis, National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention Centers for Disease Control and Prevention Atlanta GA 30329
| | - Youkyung Choi
- Division of Viral Hepatitis, National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention Centers for Disease Control and Prevention Atlanta GA 30329
| | - Jessica Joyce
- Wallace Coulter Department of Biomedical Engineering at Georgia Tech and Emory University Georgia Institute of Technology Atlanta GA 30332
| | - Siobhan M O'Connor
- Division of Viral Hepatitis, National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention Centers for Disease Control and Prevention Atlanta GA 30329
| | - Saleem Kamili
- Division of Viral Hepatitis, National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention Centers for Disease Control and Prevention Atlanta GA 30329
| | - Mark R Prausnitz
- School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332.,Wallace Coulter Department of Biomedical Engineering at Georgia Tech and Emory University Georgia Institute of Technology Atlanta GA 30332
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216
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Du G, Woythe L, van der Maaden K, Leone M, Romeijn S, Kros A, Kersten G, Jiskoot W, Bouwstra JA. Coated and Hollow Microneedle-Mediated Intradermal Immunization in Mice with Diphtheria Toxoid Loaded Mesoporous Silica Nanoparticles. Pharm Res 2018; 35:189. [PMID: 30105542 PMCID: PMC6096895 DOI: 10.1007/s11095-018-2476-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 08/06/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE To examine the immunogenicity of diphtheria toxoid (DT) loaded mesoporous silica nanoparticles (MSNs) after coated and hollow microneedle-mediated intradermal immunization in mice. METHODS DT was loaded into MSNs and the nanoparticle surface was coated with a lipid bilayer (LB-MSN-DT). To prepare coated microneedles, alternating layers of negatively charged LB-MSN-DT and positively charged N-trimethyl chitosan (TMC) were coated onto pH-sensitive microneedle arrays via a layer-by-layer approach. Microneedle arrays coated with 5 or 3 layers of LB-MSN-DT were used to immunize mice and the elicited antibody responses were compared with those induced by hollow microneedle-injected liquid formulation of LB-MSN-DT. Liquid DT formulation with and without TMC (DT/TMC) injected by a hollow microneedle were used as controls. RESULTS LB-MSN-DT had an average size of about 670 nm and a zeta potential of -35 mV. The encapsulation efficiency of DT in the nanoparticles was 77%. The amount of nano-encapsulated DT coated onto the microneedle array increased linearly with increasing number of the coating layers. Nano-encapsulated DT induced stronger immune responses than DT solution when delivered intradermally via hollow microneedles, but not when delivered via coated microneedles. CONCLUSION Both the nano-encapsulation of DT and the type of microneedles affect the immunogenicity of the antigen.
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Affiliation(s)
- Guangsheng Du
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Laura Woythe
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Koen van der Maaden
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Mara Leone
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Stefan Romeijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Alexander Kros
- Department of Supramolecular & Biomaterials Chemistry, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Gideon Kersten
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Institute for Translational Vaccinology (Intravacc), Bilthoven, The Netherlands
| | - Wim Jiskoot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Joke A Bouwstra
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands.
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217
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Pamornpathomkul B, Ngawhirunpat T, Tekko IA, Vora L, McCarthy HO, Donnelly RF. Dissolving polymeric microneedle arrays for enhanced site-specific acyclovir delivery. Eur J Pharm Sci 2018; 121:200-209. [DOI: 10.1016/j.ejps.2018.05.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/12/2018] [Accepted: 05/13/2018] [Indexed: 01/23/2023]
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218
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Spatially controlled coating of continuous liquid interface production microneedles for transdermal protein delivery. J Control Release 2018; 284:122-132. [DOI: 10.1016/j.jconrel.2018.05.042] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 05/21/2018] [Accepted: 05/31/2018] [Indexed: 11/22/2022]
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219
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Chen HJ, Lin DA, Liu F, Zhou L, Liu D, Lin Z, Yang C, Jin Q, Hang T, He G, Xie X. Transdermal Delivery of Living and Biofunctional Probiotics through Dissolvable Microneedle Patches. ACS APPLIED BIO MATERIALS 2018; 1:374-381. [PMID: 35016397 DOI: 10.1021/acsabm.8b00102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hui-Jiuan Chen
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Di-an Lin
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Fanmao Liu
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Lingfei Zhou
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Di Liu
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois 60637, United States
| | - Zhihong Lin
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Chengduan Yang
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Quanchang Jin
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Tian Hang
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Gen He
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
| | - Xi Xie
- The First Affiliated Hospital of Sun Yat-Sen University, State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China
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Abstract
Delivering therapeutics in a painless manner is one of the many objectives for the treatment of clinical conditions. Micro and nanoneedles are small-scale devices that can help overcome the resistance encountered during drug diffusion by creating conduits of small dimensions through biomembranes. Microneedles for drug delivery applications were manually produced until the 1990s and after this the high precision technology from the semiconductor industry was adopted for their production [ 1 ]. Over the last decade or so, microneedles for transdermal applications have been widely studied. Currently, microneedle patches, mainly based on hyaluronates, are available over the counter for cosmetic applications. On the other hand, nanoneedles are used in atomic force microscopy, which has been explored for drug delivery and biosensing over the last two decades [ 2 , 3 ]. Micro and nanoneedle-based biosensing also poses potential for environment-responsive drug delivery. In this article, the current research, clinical studies and future perspectives of micro and nanoneedle-based systems are discussed for drug delivery and biosensing applications.
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221
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Lim SH, Kathuria H, Tan JJY, Kang L. 3D printed drug delivery and testing systems - a passing fad or the future? Adv Drug Deliv Rev 2018; 132:139-168. [PMID: 29778901 DOI: 10.1016/j.addr.2018.05.006] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 04/12/2018] [Accepted: 05/12/2018] [Indexed: 12/23/2022]
Abstract
The US Food and Drug Administration approval of the first 3D printed tablet in 2015 has ignited growing interest in 3D printing, or additive manufacturing (AM), for drug delivery and testing systems. Beyond just a novel method for rapid prototyping, AM provides key advantages over traditional manufacturing of drug delivery and testing systems. These includes the ability to fabricate complex geometries to achieve variable drug release kinetics; ease of personalising pharmacotherapy for patient and lowering the cost for fabricating personalised dosages. Furthermore, AM allows fabrication of complex and micron-sized tissue scaffolds and models for drug testing systems that closely resemble in vivo conditions. However, there are several limitations such as regulatory concerns that may impede the progression to market. Here, we provide an overview of the advantages of AM drug delivery and testing, as compared to traditional manufacturing techniques. Also, we discuss the key challenges and future directions for AM enabled pharmaceutical applications.
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Affiliation(s)
- Seng Han Lim
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Block S4A, Level 3, 117543, Singapore
| | - Himanshu Kathuria
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Block S4A, Level 3, 117543, Singapore
| | - Justin Jia Yao Tan
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Block S4A, Level 3, 117543, Singapore
| | - Lifeng Kang
- School of Pharmacy, University of Sydney, Pharmacy and Bank Building A15, NSW 2006, Australia.
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222
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Liu TT, Chen K, Wang Q. Skin drug permeability and safety through a vibrating solid micro-needle system. Drug Deliv Transl Res 2018; 8:1025-1033. [PMID: 29858819 DOI: 10.1007/s13346-018-0544-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Micro-needles and sonophoresis are two physical methods for enhancing skin permeation for transdermal drug delivery. A solid micro-needle system with vertical vibration was integrated and its effects on transdermal drug delivery were studied. Evan's blue (EB) staining and histological evaluation were performed to reveal the skin morphology and micro-conduits created by vibrating micro-needles. Trans-epidermal water loss (TEWL) and infection studies on rat's skin after vibrating micro-needle treatment were performed to evaluate the safety of the treatment. In vivo insulin delivery and tetramethylpyrazine hydrochloride (TMPH) permeation were carried out to assess the effectiveness of the transdermal drug delivery using the vibrating micro-needle system. The structural integrity of vibrated micro-needles was studied through SEM photos. EB staining observation showed that EB has diffused significantly on the skin surface treated with vibrating micro-needles. The micro-conduits were seen by histological visualization. TEWL values increased significantly after treatment as vibration frequency increased. The infection evaluation showed a slight increase of white blood cell number resulted from vibrating micro-needle treatment. The in vivo insulin absorption experiment demonstrated an enhanced transdermal delivery of insulin through vibrating micro-needles treatment, and the effectiveness of blood glucose level increased with increasing vibration frequency. The TMPH permeation study showed an obvious enhanced skin permeability due to vibrating micro-needle pretreatment. The degree of enhancement also increased with vibration frequency. No broken tip of vibrated micro-needle was found after application. The vibrating solid micro-needle was effective and safe for the transdermal administration of hydrophilic drugs. The effectiveness increases with increasing vibration frequency.
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Affiliation(s)
- Ting-Ting Liu
- School of Mechanical Engineering, Hangzhou Dianzi University, Zhejiang, 310018, Hangzhou, China
| | - Kai Chen
- School of Mechanical Engineering, Hangzhou Dianzi University, Zhejiang, 310018, Hangzhou, China.
| | - Qiao Wang
- Institute of Metaria Medica, Zhejiang Academy of Medical Sciences, Zhejiang, 310013, Hangzhou, China
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223
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Du G, Leone M, Romeijn S, Kersten G, Jiskoot W, Bouwstra JA. Immunogenicity of diphtheria toxoid and poly(I:C) loaded cationic liposomes after hollow microneedle-mediated intradermal injection in mice. Int J Pharm 2018; 547:250-257. [PMID: 29870743 DOI: 10.1016/j.ijpharm.2018.06.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 02/06/2023]
Abstract
In this study, we aimed to investigate the immunogenicity of cationic liposomes loaded with diphtheria toxoid (DT) and poly(I:C) after hollow microneedle-mediated intradermal vaccination in mice. The following liposomal formulations were studied: DT loaded liposomes, a mixture of free DT and poly(I:C)-loaded liposomes, a mixture of DT-loaded liposomes and free poly(I:C), and liposomal formulations with DT and poly(I:C) either individually or co-encapsulated in the liposomes. Reference groups were DT solution adjuvanted with or without poly(I:C) (DT/poly(I:C)). The liposomal formulations were characterized in terms of particle size, zeta potential, loading and release of DT and poly(I:C). After intradermal injection of BALB/c mice with the formulations through a hollow microneedle, the immunogenicity was assessed by DT-specific ELISAs. All formulations induced similar total IgG and IgG1 titers. However, all the liposomal groups containing both DT and poly(I:C) showed enhanced IgG2a titers compared to DT/poly(I:C) solution, indicating that the immune response was skewed towards a Th1 direction. This enhancement was similar for all liposomal groups that contain both DT and poly(I:C) in the formulations. Our results reveal that a mixture of DT encapsulated liposomes and poly(I:C) encapsulated liposomes have a similar effect on the antibody responses as DT and poly(I:C) co-encapsulated liposomes. These findings may have implications for future design of liposomal vaccine delivery systems.
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Affiliation(s)
- Guangsheng Du
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden 2300 RA, The Netherlands
| | - Mara Leone
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden 2300 RA, The Netherlands
| | - Stefan Romeijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden 2300 RA, The Netherlands
| | - Gideon Kersten
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden 2300 RA, The Netherlands; Department of Analytical Development and Formulation, Intravacc, Bilthoven 3720 AL, The Netherlands
| | - Wim Jiskoot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden 2300 RA, The Netherlands
| | - Joke A Bouwstra
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden 2300 RA, The Netherlands.
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224
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Jeong HR, Kim JY, Kim SN, Park JH. Local dermal delivery of cyclosporin A, a hydrophobic and high molecular weight drug, using dissolving microneedles. Eur J Pharm Biopharm 2018; 127:237-243. [DOI: 10.1016/j.ejpb.2018.02.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/08/2018] [Accepted: 02/08/2018] [Indexed: 10/18/2022]
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225
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Mönkäre J, Pontier M, van Kampen EEM, Du G, Leone M, Romeijn S, Nejadnik MR, O'Mahony C, Slütter B, Jiskoot W, Bouwstra JA. Development of PLGA nanoparticle loaded dissolving microneedles and comparison with hollow microneedles in intradermal vaccine delivery. Eur J Pharm Biopharm 2018; 129:111-121. [PMID: 29803720 DOI: 10.1016/j.ejpb.2018.05.031] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/18/2018] [Accepted: 05/23/2018] [Indexed: 10/16/2022]
Abstract
Skin is an attractive but also very challenging immunisation site for particulate subunit vaccines. The aim of this study was to develop hyaluronan (HA)-based dissolving microneedles (MNs) loaded with PLGA nanoparticles (NPs) co-encapsulating ovalbumin (OVA) and poly(I:C) for intradermal immunisation. The NP:HA ratio used for the preparation of dissolving MNs appeared to be critical for the quality of MNs and their dissolution in ex vivo human skin. Asymmetrical flow field-flow fractionation and dynamic light scattering were used to analyse the NPs released from the MNs in vitro. Successful release of the NPs depended on the drying conditions during MN preparation. The delivered antigen dose from dissolving MNs in mice was determined to be 1 µg OVA, in NPs or as free antigen, by using near-infrared fluorescence imaging. Finally, the immunogenicity of the NPs after administration of dissolving MNs (NP:HA weight ratio 1:4) was compared with that of hollow MN-delivered NPs in mice. Immunization with free antigen in dissolving MNs resulted in equally strong immune responses compared to delivery by hollow MNs. However, humoral and cellular immune responses evoked by NP-loaded dissolving MNs were inferior to those elicited by NPs delivered through a hollow MN. In conclusion, we identified several critical formulation parameters for the further development of NP-loaded dissolving MNs.
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Affiliation(s)
- Juha Mönkäre
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Maria Pontier
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Eveline E M van Kampen
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Guangsheng Du
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Mara Leone
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Stefan Romeijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - M Reza Nejadnik
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Conor O'Mahony
- Tyndall National Institute, Lee Maltings Complex, University College Cork, Dyke Parade, T12R5CP Cork, Ireland
| | - Bram Slütter
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Wim Jiskoot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Joke A Bouwstra
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 2300, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
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226
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Abstract
Vaccine delivery to the skin using conventional needles is associated with needle-stick injuries and needle-phobia, which are all major obstacles to vaccination. The development of microneedles has enabled to overcome these limitations and as a result viral, DNA and bacterial vaccines have been studied for the delivery into the skin. Research has shown the superiority of microneedle vaccination over conventional needles in terms of immunogenicity, vaccine stability and dose-sparing abilities in animals and humans. Additional research on improving vaccine stability and delivering vaccines to other areas of the body besides the skin is ongoing as well. Thus, this review paper describes current advances in microneedles as a delivery system for vaccines as well as future perspectives for this research field.
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227
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Ullah A, Kim CM, Kim GM. Porous polymer coatings on metal microneedles for enhanced drug delivery. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171609. [PMID: 29765638 PMCID: PMC5936903 DOI: 10.1098/rsos.171609] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 03/13/2018] [Indexed: 05/28/2023]
Abstract
We present a simple method to coat microneedles (MNs) uniformly with a porous polymer (PLGA) that can deliver drugs at high rates. Stainless steel (SS) MNs of high mechanical strength were coated with a thin porous polymer layer to enhance their delivery rates. Additionally, to improve the interfacial adhesion between the polymer and MNs, the MN surface was modified by plasma treatment followed by dip coating with polyethyleneimine, a polymer with repeating amine units. The average failure load (the minimum force sufficient for detaching the polymer layer from the surface of SS) recorded for the modified surface coating was 25 N, whereas it was 2.2 N for the non-modified surface. Calcein dye was successfully delivered into porcine skin to a depth of 750 µm by the porous polymer-coated MNs, demonstrating that the developed MNs can pierce skin easily without deformation of MNs; additional skin penetration tests confirmed this finding. For visual comparison, rhodamine B dye was delivered using porous-coated and non-coated MNs in gelatin gel which showed that delivery with porous-coated MNs penetrate deeper when compared with non-coated MNs. Finally, lidocaine and rhodamine B dye were delivered in phosphate-buffered saline (PBS) medium by porous polymer-coated and non-coated MNs. For rhodamine B, drug delivery with the porous-coated MNs was five times higher than that with the non-coated MNs, whereas 25 times more lidocaine was delivered by the porous-coated MNs compared with the non-coated MNs.
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Affiliation(s)
| | | | - Gyu Man Kim
- School of Mechanical Engineering, Kyungpook National University, 80 Deahak-ro, Buk-gu, Daegu 41566, Korea
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228
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Sanjay ST, Zhou W, Dou M, Tavakoli H, Ma L, Xu F, Li X. Recent advances of controlled drug delivery using microfluidic platforms. Adv Drug Deliv Rev 2018; 128:3-28. [PMID: 28919029 PMCID: PMC5854505 DOI: 10.1016/j.addr.2017.09.013] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/11/2017] [Accepted: 09/13/2017] [Indexed: 12/13/2022]
Abstract
Conventional systematically-administered drugs distribute evenly throughout the body, get degraded and excreted rapidly while crossing many biological barriers, leaving minimum amounts of the drugs at pathological sites. Controlled drug delivery aims to deliver drugs to the target sites at desired rates and time, thus enhancing the drug efficacy, pharmacokinetics, and bioavailability while maintaining minimal side effects. Due to a number of unique advantages of the recent microfluidic lab-on-a-chip technology, microfluidic lab-on-a-chip has provided unprecedented opportunities for controlled drug delivery. Drugs can be efficiently delivered to the target sites at desired rates in a well-controlled manner by microfluidic platforms via integration, implantation, localization, automation, and precise control of various microdevice parameters. These features accordingly make reproducible, on-demand, and tunable drug delivery become feasible. On-demand self-tuning dynamic drug delivery systems have shown great potential for personalized drug delivery. This review presents an overview of recent advances in controlled drug delivery using microfluidic platforms. The review first briefly introduces microfabrication techniques of microfluidic platforms, followed by detailed descriptions of numerous microfluidic drug delivery systems that have significantly advanced the field of controlled drug delivery. Those microfluidic systems can be separated into four major categories, namely drug carrier-free micro-reservoir-based drug delivery systems, highly integrated carrier-free microfluidic lab-on-a-chip systems, drug carrier-integrated microfluidic systems, and microneedles. Microneedles can be further categorized into five different types, i.e. solid, porous, hollow, coated, and biodegradable microneedles, for controlled transdermal drug delivery. At the end, we discuss current limitations and future prospects of microfluidic platforms for controlled drug delivery.
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Affiliation(s)
- Sharma T. Sanjay
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Wan Zhou
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Maowei Dou
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
| | - Hamed Tavakoli
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Lei Ma
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Feng Xu
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - XiuJun Li
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Border Biomedical Research Center, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Biomedical Engineering, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Environmental Science and Engineering, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
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Lee HJ, Choi N, Yoon ES, Cho IJ. MEMS devices for drug delivery. Adv Drug Deliv Rev 2018; 128:132-147. [PMID: 29117510 DOI: 10.1016/j.addr.2017.11.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 09/06/2017] [Accepted: 11/02/2017] [Indexed: 01/27/2023]
Abstract
Novel drug delivery systems based on microtechnology have advanced tremendously, but yet face some technological and societal hurdles to fully achieve their potential. The novel drug delivery systems aim to deliver drugs in a spatiotemporal- and dosage-controlled manner with a goal to address the unmet medical needs from oral delivery and hypodermic injection. The unmet needs include effective delivery of new types of drug candidates that are otherwise insoluble and unstable, targeted delivery to areas protected by barriers (e.g. brain and posterior eye segment), localized delivery of potent drugs, and improved patient compliance. After scrutinizing the design considerations and challenges associated with delivery to areas that cannot be efficiently targeted through standard drug delivery (e.g. brain, posterior eye segment, and gastrointestinal tract), this review provides a summary of recent advances that addressed these challenges and summarizes yet unresolved problems in each target area. The opportunities for innovation in devising the novel drug delivery systems are still high; with integration of advanced microtechnology, advanced fabrication of biomaterials, and biotechnology, the novel drug delivery is poised to be a promising alternative to the oral administration and hypodermic injection for a large spectrum of drug candidates.
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Affiliation(s)
- Hyunjoo J Lee
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Nakwon Choi
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology (Biomedical Engineering), KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Eui-Sung Yoon
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Il-Joo Cho
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology (Biomedical Engineering), KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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230
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Wang QL, Ren JW, Chen BZ, Jin X, Zhang CY, Guo XD. Effect of humidity on mechanical properties of dissolving microneedles for transdermal drug delivery. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.10.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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231
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Lee H, Song C, Baik S, Kim D, Hyeon T, Kim DH. Device-assisted transdermal drug delivery. Adv Drug Deliv Rev 2018; 127:35-45. [PMID: 28867296 DOI: 10.1016/j.addr.2017.08.009] [Citation(s) in RCA: 172] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 08/19/2017] [Accepted: 08/29/2017] [Indexed: 12/31/2022]
Abstract
Transdermal drug delivery is a prospective drug delivery strategy to complement the limitations of conventional drug delivery systems including oral and injectable methods. This delivery route allows both convenient and painless drug delivery and a sustained release profile with reduced side effects. However, physiological barriers in the skin undermine the delivery efficiency of conventional patches, limiting drug candidates to small-molecules and lipophilic drugs. Recently, transdermal drug delivery technology has advanced from unsophisticated methods simply relying on natural diffusion to drug releasing systems that dynamically respond to external stimuli. Furthermore, physical barriers in the skin have been overcome using microneedles, and controlled delivery by wearable biosensors has been enabled ultimately. In this review, we classify the evolution of advanced drug delivery strategies based on generations and provide a comprehensive overview. Finally, the recent progress in advanced diagnosis and therapy through customized drug delivery systems based on real-time analysis of physiological cues is highlighted.
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Affiliation(s)
- Hyunjae Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Changyeong Song
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Seungmin Baik
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Dokyoon Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea.
| | - Dae-Hyeong Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea.
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232
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Ye Y, Yu J, Wen D, Kahkoska AR, Gu Z. Polymeric microneedles for transdermal protein delivery. Adv Drug Deliv Rev 2018; 127:106-118. [PMID: 29408182 PMCID: PMC6020694 DOI: 10.1016/j.addr.2018.01.015] [Citation(s) in RCA: 189] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 12/24/2017] [Accepted: 01/24/2018] [Indexed: 12/12/2022]
Abstract
The intrinsic properties of therapeutic proteins generally present a major impediment for transdermal delivery, including their relatively large molecule size and susceptibility to degradation. One solution is to utilize microneedles (MNs), which are capable of painlessly traversing the stratum corneum and directly translocating protein drugs into the systematic circulation. MNs can be designed to incorporate appropriate structural materials as well as therapeutics or formulations with tailored physicochemical properties. This platform technique has been applied to deliver drugs both locally and systemically in applications ranging from vaccination to diabetes and cancer therapy. This review surveys the current design and use of polymeric MNs for transdermal protein delivery. The clinical potential and future translation of MNs are also discussed.
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Affiliation(s)
- Yanqi Ye
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA; Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jicheng Yu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA; Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Di Wen
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA; Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Anna R Kahkoska
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Zhen Gu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA; Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.
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233
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Gualeni B, Coulman S, Shah D, Eng P, Ashraf H, Vescovo P, Blayney G, Piveteau LD, Guy O, Birchall J. Minimally invasive and targeted therapeutic cell delivery to the skin using microneedle devices. Br J Dermatol 2018; 178:731-739. [DOI: 10.1111/bjd.15923] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2017] [Indexed: 12/21/2022]
Affiliation(s)
- B. Gualeni
- School of Pharmacy and Pharmaceutical Sciences; Redwood Building; Cardiff University; Cardiff CF10 3NB U.K
- Extraject Technologies Ltd; Cardiff Medicentre, Heath Park; Cardiff CF14 4UJ U.K
| | - S.A. Coulman
- School of Pharmacy and Pharmaceutical Sciences; Redwood Building; Cardiff University; Cardiff CF10 3NB U.K
- Extraject Technologies Ltd; Cardiff Medicentre, Heath Park; Cardiff CF14 4UJ U.K
| | - D. Shah
- The Hillingdon Hospital NHS Foundation Trust; Pield Heath Road Uxbridge UB8 3NN U.K
| | - P.F. Eng
- Centre for NanoHealth; College of Engineering; Swansea University; Swansea SA2 8PQ U.K
| | - H. Ashraf
- SPTS Technologies; Ringland Way Newport NP18 2TA U.K
| | - P. Vescovo
- Debiotech SA; Avenue de Sévelin 28 1004 Lausanne Switzerland
| | - G.J. Blayney
- Centre for NanoHealth; College of Engineering; Swansea University; Swansea SA2 8PQ U.K
| | - L.-D. Piveteau
- Debiotech SA; Avenue de Sévelin 28 1004 Lausanne Switzerland
| | - O.J. Guy
- Centre for NanoHealth; College of Engineering; Swansea University; Swansea SA2 8PQ U.K
| | - J.C. Birchall
- School of Pharmacy and Pharmaceutical Sciences; Redwood Building; Cardiff University; Cardiff CF10 3NB U.K
- Extraject Technologies Ltd; Cardiff Medicentre, Heath Park; Cardiff CF14 4UJ U.K
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234
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Wan Y, Hickey JM, Bird C, Witham K, Fahey P, Forster A, Joshi SB, Volkin DB. Development of Stabilizing Formulations of a Trivalent Inactivated Poliovirus Vaccine in a Dried State for Delivery in the Nanopatch™ Microprojection Array. J Pharm Sci 2018; 107:1540-1551. [PMID: 29421219 PMCID: PMC5959271 DOI: 10.1016/j.xphs.2018.01.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/22/2018] [Accepted: 01/26/2018] [Indexed: 12/20/2022]
Abstract
The worldwide switch to inactivated polio vaccines (IPVs) is a key component of the overall strategy to achieve and maintain global polio eradication. To this end, new IPV vaccine delivery systems may enhance patient convenience and compliance. In this work, we examine Nanopatch™ (a solid, polymer microprojection array) which offers potential advantages over standard needle/syringe administration including intradermal delivery and reduced antigen doses. Using trivalent IPV (tIPV) and a purpose-built evaporative dry-down system, candidate tIPV formulations were developed to stabilize tIPV during the drying process and on storage. Identifying conditions to minimize tIPV potency losses during rehydration and potency testing was a critical first step. Various classes and types of pharmaceutical excipients (∼50 total) were then evaluated to mitigate potency losses (measured through D-antigen ELISAs for IPV1, IPV2, and IPV3) during drying and storage. Various concentrations and combinations of stabilizing additives were optimized in terms of tIPV potency retention, and 2 candidate tIPV formulations containing cyclodextrin and a reducing agent (e.g., glutathione), maintained ≥80% D-antigen potency during drying and subsequent storage for 4 weeks at 4°C, and ≥60% potency for 3 weeks at room temperature with the majority of losses occurring within the first day of storage.
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Affiliation(s)
- Ying Wan
- Department of Pharmaceutical Chemistry, Macromolecule and Vaccine Stabilization Center, University of Kansas, Lawrence, Kansas 66047
| | - John M Hickey
- Department of Pharmaceutical Chemistry, Macromolecule and Vaccine Stabilization Center, University of Kansas, Lawrence, Kansas 66047
| | - Christopher Bird
- Department of Pharmaceutical Chemistry, Macromolecule and Vaccine Stabilization Center, University of Kansas, Lawrence, Kansas 66047
| | - Katey Witham
- Vaxxas Pty Ltd, Translational Research Institute, 37 Kent Street, Brisbane, Queensland 4102, Australia
| | - Paul Fahey
- Vaxxas Pty Ltd, Translational Research Institute, 37 Kent Street, Brisbane, Queensland 4102, Australia
| | - Angus Forster
- Vaxxas Pty Ltd, Translational Research Institute, 37 Kent Street, Brisbane, Queensland 4102, Australia
| | - Sangeeta B Joshi
- Department of Pharmaceutical Chemistry, Macromolecule and Vaccine Stabilization Center, University of Kansas, Lawrence, Kansas 66047
| | - David B Volkin
- Department of Pharmaceutical Chemistry, Macromolecule and Vaccine Stabilization Center, University of Kansas, Lawrence, Kansas 66047.
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235
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In Vivo Experimental Study of Noninvasive Insulin Microinjection through Hollow Si Microneedle Array. MICROMACHINES 2018; 9:mi9010040. [PMID: 30393315 PMCID: PMC6187700 DOI: 10.3390/mi9010040] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/02/2018] [Accepted: 01/16/2018] [Indexed: 12/13/2022]
Abstract
An experimental study of in vivo insulin delivery through microinjection by using hollow silicon microneedle array is presented. A case study was carried out on a healthy human subject in vivo to determine the influence of delivery parameters on drug transfer efficiency. As a microinjection device, a hollow microneedle array (13 × 13 mm2) having 100 microneedles (220 µm high, 130 µm-outer diameter and 50 µm-inner diameter) was designed and fabricated using classical microfabrication techniques. The efficiency of the delivery process was first characterized using methylene blue and a saline solution. Based on these results, the transfer efficiency was found to be predominantly limited by the inability of viable epidermis to absorb and allow higher drug transport toward the capillary-rich region. Two types of fast-acting insulin were used to provide evidence of efficient delivery by hollow MNA to a human subject. By performing blood analyses, infusion of more-concentrated insulin (200 IU/mL, international units (IU)) exhibited similar blood glucose level drop (5–7%) compared to insulin of standard concentration (100 IU/mL), however, significant increase of serum insulin (40–50%) with respect to the preinfusion values was determined. This was additionally confirmed by a distinctive increase of insulin to C-peptide ratio as compared to preinfusion ratio. Moreover, we noticed that this route of administration mimics a multiple dose regimen, able to get a “steady state” for insulin plasma concentration.
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236
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Abstract
Although viral vectors comprise the majority of gene delivery vectors, their various safety, production, and other practical concerns have left a research gap to be addressed. The non-viral vector space encompasses a growing variety of physical and chemical methods capable of gene delivery into the nuclei of target cells. Major physical methods described in this chapter are microinjection, electroporation, and ballistic injection, magnetofection, sonoporation, optical transfection, and localized hyperthermia. Major chemical methods described in this chapter are lipofection, polyfection, gold complexation, and carbon-based methods. Combination approaches to improve transfection efficiency or reduce immunological response have shown great promise in expanding the scope of non-viral gene delivery.
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Affiliation(s)
- Chi Hong Sum
- University of Waterloo, School of Pharmacy, Waterloo, ON, Canada
| | | | - Shirley Wong
- University of Waterloo, School of Pharmacy, Waterloo, ON, Canada
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237
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Pamornpathomkul B, Niyomtham N, Yingyongnarongkul BE, Prasitpuriprecha C, Rojanarata T, Ngawhirunpat T, Opanasopit P. Cationic Niosomes for Enhanced Skin Immunization of Plasmid DNA-Encoding Ovalbumin via Hollow Microneedles. AAPS PharmSciTech 2018; 19:481-488. [PMID: 28828737 DOI: 10.1208/s12249-017-0855-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 08/06/2017] [Indexed: 11/30/2022] Open
Abstract
The purpose of the present study was to evaluate the use of cationic niosomes composed of Span20:cholesterol:cationic lipid (N 1,N 1-dimyristeroyloxyethyl-spermine) at the molar ratio of 2.5:2.5:0.5 mM combined with hollow microneedle (MN) devices for in vivo skin immunization of plasmid DNA-encoding ovalbumin (pOVA). The results revealed that using hollow MNs with cationic niosomes for pOVA penetration successfully induced both humoral and cell-mediated immune responses including immunoglobulin G (IgG) antibody responses, interleukin-4 (IL-4), and interferon gamma (IFN-γ) cytokine secretion. When using hollow MNs with cationic niosome/pOVA complexes, the immune response was superior to naked pOVA, which testifies the increased amount of IgG antibody responses and cytokine secretion. In comparison with conventional subcutaneous (SC) injections, using hollow MNs with cationic niosome/pOVA complexes induced a higher level of both IgG immune response and cytokine release. Moreover, a group of mice immunized with hollow MNs did not show infection or bleeding on the skin. Consequently, targeted delivery of pOVA using cationic niosomes combined with hollow MNs might prove a promising vaccination method for skin vaccination.
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238
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Vallhov H, Xia W, Engqvist H, Scheynius A. Bioceramic microneedle arrays are able to deliver OVA to dendritic cells in human skin. J Mater Chem B 2018; 6:6808-6816. [DOI: 10.1039/c8tb01476k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bioceramic arrays with high-aspect-ratio microneedles were able to penetrate human ex vivo skin and deliver their cargo to dendritic cells.
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Affiliation(s)
- Helen Vallhov
- Department of Clinical Science and Education
- Karolinska Institutet
- and Sachs' Children and Youth Hospital
- SE-118 83 Stockholm
- Sweden
| | - Wei Xia
- Division for Applied Materials Science
- Department of Engineering Sciences
- The Ångström Laboratory
- Uppsala University
- SE-751 21 Uppsala
| | - Håkan Engqvist
- Division for Applied Materials Science
- Department of Engineering Sciences
- The Ångström Laboratory
- Uppsala University
- SE-751 21 Uppsala
| | - Annika Scheynius
- Department of Clinical Science and Education
- Karolinska Institutet
- and Sachs' Children and Youth Hospital
- SE-118 83 Stockholm
- Sweden
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239
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van der Maaden K, Heuts J, Camps M, Pontier M, Terwisscha van Scheltinga A, Jiskoot W, Ossendorp F, Bouwstra J. Hollow microneedle-mediated micro-injections of a liposomal HPV E743–63 synthetic long peptide vaccine for efficient induction of cytotoxic and T-helper responses. J Control Release 2018; 269:347-354. [DOI: 10.1016/j.jconrel.2017.11.035] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/20/2017] [Accepted: 11/21/2017] [Indexed: 01/01/2023]
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240
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Rapid fabrication of microneedles using magnetorheological drawing lithography. Acta Biomater 2018; 65:283-291. [PMID: 29107057 DOI: 10.1016/j.actbio.2017.10.030] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 09/22/2017] [Accepted: 10/17/2017] [Indexed: 12/12/2022]
Abstract
Microneedles are micron-sized needles that are widely applied in biomedical fields owing to their painless, minimally invasive, and convenient operation. However, most microneedle fabrication approaches are costly, time consuming, involve multiple steps, and require expensive equipment. In this study, we present a novel magnetorheological drawing lithography (MRDL) method to efficiently fabricate microneedle, bio-inspired microneedle, and molding-free microneedle array. With the assistance of an external magnetic field, the 3D structure of a microneedle can be directly drawn from a droplet of curable magnetorheological fluid. The formation process of a microneedle consists of two key stages, elasto-capillary self-thinning and magneto-capillary self-shrinking, which greatly affect the microneedle height and tip radius. Penetration and fracture tests demonstrated that the microneedle had sufficient strength and toughness for skin penetration. Microneedle arrays and a bio-inspired microneedle were also fabricated, which further demonstrated the versatility and flexibility of the MRDL method. STATEMENT OF SIGNIFICANCE Microneedles have been widely applied in biomedical fields owing to their painless, minimally invasive, and convenient operation. However, most microneedle fabrication approaches are costly, time consuming, involve multiple steps, and require expensive equipment. Furthermore, most researchers have focused on the biomedical applications of microneedles but have given little attention to the optimization of the fabrication process. This research presents a novel magnetorheological drawing lithography (MRDL) method to fabricate microneedle, bio-inspired microneedle, and molding-free microneedle array. In this proposed technique, a droplet of curable magnetorheological fluid (CMRF) is drawn directly from almost any substrate to produce a 3D microneedle under an external magnetic field. This method not only inherits the advantages of thermal drawing approach without the need for a mask and light irradiation but also eliminates the requirement for drawing temperature adjustment. The MRDL method is extremely simple and can even produce the complex and multiscale structure of bio-inspired microneedle.
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241
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Tarbox TN, Watts AB, Cui Z, Williams RO. An update on coating/manufacturing techniques of microneedles. Drug Deliv Transl Res 2017; 8:1828-1843. [DOI: 10.1007/s13346-017-0466-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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242
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Yang G, He M, Zhang S, Wu M, Gao Y. An acryl resin-based swellable microneedles for controlled release intradermal delivery of granisetron. Drug Dev Ind Pharm 2017; 44:808-816. [DOI: 10.1080/03639045.2017.1414230] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Guozhong Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Meilin He
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Suohui Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Man Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Yunhua Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
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243
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de Groot AM, Platteel ACM, Kuijt N, van Kooten PJS, Vos PJ, Sijts AJAM, van der Maaden K. Nanoporous Microneedle Arrays Effectively Induce Antibody Responses against Diphtheria and Tetanus Toxoid. Front Immunol 2017; 8:1789. [PMID: 29375544 PMCID: PMC5770646 DOI: 10.3389/fimmu.2017.01789] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/29/2017] [Indexed: 01/06/2023] Open
Abstract
The skin is immunologically very potent because of the high number of antigen-presenting cells in the dermis and epidermis, and is therefore considered to be very suitable for vaccination. However, the skin's physical barrier, the stratum corneum, prevents foreign substances, including vaccines, from entering the skin. Microneedles, which are needle-like structures with dimensions in the micrometer range, form a relatively new approach to circumvent the stratum corneum, allowing for minimally invasive and pain-free vaccination. In this study, we tested ceramic nanoporous microneedle arrays (npMNAs), representing a novel microneedle-based drug delivery technology, for their ability to deliver the subunit vaccines diphtheria toxoid (DT) and tetanus toxoid (TT) intradermally. First, the piercing ability of the ceramic (alumina) npMNAs, which contained over 100 microneedles per array, a length of 475 µm, and an average pore size of 80 nm, was evaluated in mouse skin. Then, the hydrodynamic diameters of DT and TT and the loading of DT, TT, and imiquimod into, and subsequent release from the npMNAs were assessed in vitro. It was shown that DT and TT were successfully loaded into the tips of the ceramic nanoporous microneedles, and by using near-infrared fluorescently labeled antigens, we found that DT and TT were released following piercing of the antigen-loaded npMNAs into ex vivo murine skin. Finally, the application of DT- and TT-loaded npMNAs onto mouse skin in vivo led to the induction of antigen-specific antibodies, with titers similar to those obtained upon subcutaneous immunization with a similar dose. In conclusion, we show for the first time, the potential of npMNAs for intradermal (ID) immunization with subunit vaccines, which opens possibilities for future ID vaccination designs.
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Affiliation(s)
- Anne Marit de Groot
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Sciences, Utrecht University, Utrecht, Netherlands
| | - Anouk C. M. Platteel
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Sciences, Utrecht University, Utrecht, Netherlands
| | - Nico Kuijt
- MyLife Technologies, Leiden, Netherlands
| | - Peter J. S. van Kooten
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Sciences, Utrecht University, Utrecht, Netherlands
| | | | - Alice J. A. M. Sijts
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Sciences, Utrecht University, Utrecht, Netherlands
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244
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Omolu A, Bailly M, Day RM. Assessment of solid microneedle rollers to enhance transmembrane delivery of doxycycline and inhibition of MMP activity. Drug Deliv 2017; 24:942-951. [PMID: 28618841 PMCID: PMC8241162 DOI: 10.1080/10717544.2017.1337826] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Many chronic wounds exhibit high matrix metalloproteinase (MMP) activity that impedes the normal wound healing process. Intradermal delivery (IDD) of sub-antimicrobial concentrations of doxycycline, as an MMP inhibitor, could target early stages of chronic wound development and inhibit further wound progression. To deliver doxycycline intradermally, the skin barrier must be disrupted. Microneedle rollers offer a minimally invasive technique to penetrate the skin by creating multiple microchannels that act as temporary conduits for drugs to diffuse through. In this study, an innovative and facile approach for delivery of doxycycline across Strat-MTM membrane was investigated using microneedle rollers. The quantity and rate of doxycycline diffusing through the micropores directly correlated with increasing microneedle lengths (250, 500 and 750 μm). Treatment of Strat-MTM with microneedle rollers resulted in a reduction in fibroblast-mediated collagen gel contraction and MMP activity compared with untreated Strat-MTM. Our results show that treatment of an epidermal mimetic with microneedle rollers provides sufficient permeabilization for doxycycline diffusion and inhibition of MMP activity. We conclude that microneedle rollers are a promising, clinically ready tool suitable for delivery of doxycycline intradermally to treat chronic wounds.
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Affiliation(s)
- Abbie Omolu
- a Applied Biomedical Engineering Group, Division of Medicine , University College London , London , UK
| | | | - Richard M Day
- a Applied Biomedical Engineering Group, Division of Medicine , University College London , London , UK
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245
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Tas C, Joyce JC, Nguyen HX, Eangoor P, Knaack JS, Banga AK, Prausnitz MR. Dihydroergotamine mesylate-loaded dissolving microneedle patch made of polyvinylpyrrolidone for management of acute migraine therapy. J Control Release 2017; 268:159-165. [DOI: 10.1016/j.jconrel.2017.10.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 10/04/2017] [Accepted: 10/13/2017] [Indexed: 12/14/2022]
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246
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Moothanchery M, Seeni RZ, Xu C, Pramanik M. In vivo studies of transdermal nanoparticle delivery with microneedles using photoacoustic microscopy. BIOMEDICAL OPTICS EXPRESS 2017; 8:5483-5492. [PMID: 29296482 PMCID: PMC5745097 DOI: 10.1364/boe.8.005483] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/26/2017] [Accepted: 11/05/2017] [Indexed: 05/18/2023]
Abstract
Microneedle technology allows micron-sized conduits to be formed within the outermost skin layers for both localized and systemic delivery of therapeutics including nanoparticles. Histological methods are often employed for characterization, and unfortunately do not allow for the in vivo visualization of the delivery process. This study presents the utilization of optical resolution-photoacoustic microscopy to characterize the transdermal delivery of nanoparticles using microneedles. Specifically, we observe the in vivo transdermal delivery of gold nanoparticles using microneedles in mice ear and study the penetration, diffusion, and spatial distribution of the nanoparticles in the tissue. The promising results reveal that photoacoustic microscopy can be used as a potential imaging modality for the in vivo characterization of microneedles based drug delivery.
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Affiliation(s)
- Mohesh Moothanchery
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore
- Both authors contributed equally
| | - Razina Z. Seeni
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore
- Both authors contributed equally
| | - Chenjie Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore
- NTU-Northwestern Institute for Nanomedicine, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Manojit Pramanik
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore
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247
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Fabrication of coated polymer microneedles for transdermal drug delivery. J Control Release 2017; 265:14-21. [DOI: 10.1016/j.jconrel.2017.03.383] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 03/15/2017] [Accepted: 03/22/2017] [Indexed: 11/18/2022]
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248
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Seok H, Noh JY, Lee DY, Kim SJ, Song CS, Kim YC. Effective humoral immune response from a H1N1 DNA vaccine delivered to the skin by microneedles coated with PLGA-based cationic nanoparticles. J Control Release 2017; 265:66-74. [DOI: 10.1016/j.jconrel.2017.04.027] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 03/20/2017] [Accepted: 04/12/2017] [Indexed: 12/16/2022]
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249
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Mistilis MJ, Joyce JC, Esser ES, Skountzou I, Compans RW, Bommarius AS, Prausnitz MR. Long-term stability of influenza vaccine in a dissolving microneedle patch. Drug Deliv Transl Res 2017; 7:195-205. [PMID: 26926241 DOI: 10.1007/s13346-016-0282-2] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This study tested the hypothesis that optimized microneedle patch formulations can stabilize trivalent subunit influenza vaccine during long-term storage outside the cold chain and when exposed to potential stresses found during manufacturing and storage. Formulations containing combinations of trehalose/sucrose, sucrose/arginine, and arginine/heptagluconate were successful at retaining most or all vaccine activity during storage at 25 °C for up to 24 months as determined by ELISA assay. The best formulation of microneedle patches contained arginine/heptagluconate, which showed no significant loss of vaccine activity during the study. To validate these in vitro findings, mice were immunized using trivalent influenza vaccine stored in microneedle patches for more than 1 year at 25 °C, which elicited antibody titers greater than or equal to fresh liquid vaccine delivered by intradermal injection, indicating the retention of immunogenicity during storage. Finally, influenza vaccine in microneedle patches lost no significant activity during exposure to 60 °C for 4 months, multiple freeze-thaw cycles, or electron beam irradiation. We conclude that optimally formulated microneedle patches can retain influenza vaccine activity during extended storage outside the cold chain and during other environmental stresses, which suggests the possibility of microneedle patch storage on pharmacy shelves without refrigeration.
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Affiliation(s)
- Matthew J Mistilis
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA, 30332-0100, USA
| | - Jessica C Joyce
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Tech and Emory University, Georgia Institute of Technology, 313 Ferst Drive, Atlanta, GA, 30332-0100, USA
| | - E Stein Esser
- Department of Microbiology and Immunology and Emory Vaccine Center, Emory University School of Medicine, 1518 Clifton Road, Atlanta, GA, 30322, USA
| | - Ioanna Skountzou
- Department of Microbiology and Immunology and Emory Vaccine Center, Emory University School of Medicine, 1518 Clifton Road, Atlanta, GA, 30322, USA
| | - Richard W Compans
- Department of Microbiology and Immunology and Emory Vaccine Center, Emory University School of Medicine, 1518 Clifton Road, Atlanta, GA, 30322, USA
| | - Andreas S Bommarius
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA, 30332-0100, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332-0400, USA
| | - Mark R Prausnitz
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA, 30332-0100, USA.
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Tech and Emory University, Georgia Institute of Technology, 313 Ferst Drive, Atlanta, GA, 30332-0100, USA.
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250
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Choi K, Salehizadeh M, Da Silva RB, Hakimi N, Diller E, Hwang DK. 3D shape evolution of microparticles and 3D enabled applications using non-uniform UV flow lithography (NUFL). SOFT MATTER 2017; 13:7255-7263. [PMID: 28960218 DOI: 10.1039/c7sm00987a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The generation of microparticles with non-spherical morphologies has generated extensive interest because of their enhanced physical properties that can increase their performance in a wide variety of clinical and industrial applications. A flow lithographic technique based on stop flow lithography (SFL) recently showed the ability to fabricate particles with 3D shapes via manipulation of the UV intensity profile in a simple 2D microfluidic channel. Here, we further explore this flow lithographic method, called non-uniform flow lithography (NUFL), to investigate the 3D-shape tuning ability for the generation of 3D magnetic microparticles and their potential applications. We characterize the morphological microparticle shape change through variation of polymerization objective, UV intensity, and solution opacity. We also couple the particles' intrinsic anisotropic magnetic properties with an external magnetic field to create chains of bullet- and bell-shaped particles and a valve-like micromachine. In addition, in contrast to other complex and multi-step methodologies, NUFL shows a simple route for the facile creation of 3D microstructure platforms such as microneedles with fully modifiable tip morphology. This method presents intriguing possibilities for growing research within 3D microstructure assembly, micromachine systems and minimally invasive medical interventions.
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Affiliation(s)
- Kenneth Choi
- Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada.
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