201
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Cai B, Xia W, Bredenberg S, Li H, Engqvist H. Bioceramic microneedles with flexible and self-swelling substrate. Eur J Pharm Biopharm 2015; 94:404-10. [DOI: 10.1016/j.ejpb.2015.06.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 12/21/2022]
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202
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de Alteriis R, Vecchione R, Attanasio C, De Gregorio M, Porzio M, Battista E, Netti PA. A method to tune the shape of protein-encapsulated polymeric microspheres. Sci Rep 2015. [PMID: 26224659 PMCID: PMC4519779 DOI: 10.1038/srep12634] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Protein encapsulation technologies of polymeric microspheres currently in use have been optimized to effectively protect their “protein cargo” from inactivation occurring in biological environments, preserving its bioactivity during release up to several weeks. The scenario of protein delivery would greatly benefit by strategies enabling the production of non-spherical particles. Herein we report an easy and effective stamp-based method to produce poly-lactic-glycolic-acid (PLGA) microparticles encapsulating Vascular Endothelial Growth Factor (VEGF) of different shapes. We demonstrate that PLGA microspheres can be deformed at room temperature exploiting solvent/non-solvent plasticization in order to preserve the properties of the starting microspheres. This gentle method allows the production of shaped particles that provide a prolonged release of VEGF in active form, as verified by an angiogenic assay. The retention of the biological activity of an extremely labile molecule, i.e. VEGF, lets us hypothesize that a wide variety of drug and protein encapsulated polymeric microspheres can be processed using this method.
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Affiliation(s)
- Renato de Alteriis
- 1] Centro di Ricerca Interdipartimentale sui Biomateriali - CRIB, Università degli studi di Napoli Federico II, Napoli, 80125, Italy [2] Center for Advanced Biomaterials for Health Care - IIT@CRIB Istituto Italiano di Tecnologia, Napoli, 80125, Italy
| | - Raffaele Vecchione
- 1] Centro di Ricerca Interdipartimentale sui Biomateriali - CRIB, Università degli studi di Napoli Federico II, Napoli, 80125, Italy [2] Center for Advanced Biomaterials for Health Care - IIT@CRIB Istituto Italiano di Tecnologia, Napoli, 80125, Italy
| | - Chiara Attanasio
- Center for Advanced Biomaterials for Health Care - IIT@CRIB Istituto Italiano di Tecnologia, Napoli, 80125, Italy
| | - Maria De Gregorio
- 1] Centro di Ricerca Interdipartimentale sui Biomateriali - CRIB, Università degli studi di Napoli Federico II, Napoli, 80125, Italy [2] Center for Advanced Biomaterials for Health Care - IIT@CRIB Istituto Italiano di Tecnologia, Napoli, 80125, Italy [3] Dipartimento di Medicina Veterinaria e Produzioni Animali, Napoli, 80137, Italy
| | - Massimiliano Porzio
- Centro di Ricerca Interdipartimentale sui Biomateriali - CRIB, Università degli studi di Napoli Federico II, Napoli, 80125, Italy
| | - Edmondo Battista
- Centro di Ricerca Interdipartimentale sui Biomateriali - CRIB, Università degli studi di Napoli Federico II, Napoli, 80125, Italy
| | - Paolo A Netti
- 1] Centro di Ricerca Interdipartimentale sui Biomateriali - CRIB, Università degli studi di Napoli Federico II, Napoli, 80125, Italy [2] Center for Advanced Biomaterials for Health Care - IIT@CRIB Istituto Italiano di Tecnologia, Napoli, 80125, Italy
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203
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Park Y, Park J, Chu GS, Kim KS, Sung JH, Kim B. Transdermal delivery of cosmetic ingredients using dissolving polymer microneedle arrays. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0775-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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204
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Sun W, Inayathullah M, Manoukian MAC, Malkovskiy AV, Manickam S, Marinkovich MP, Lane AT, Tayebi L, Seifalian AM, Rajadas J. Transdermal Delivery of Functional Collagen Via Polyvinylpyrrolidone Microneedles. Ann Biomed Eng 2015; 43:2978-90. [PMID: 26066056 DOI: 10.1007/s10439-015-1353-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 06/03/2015] [Indexed: 12/22/2022]
Abstract
Collagen makes up a large proportion of the human body, particularly the skin. As the body ages, collagen content decreases, resulting in wrinkled skin and decreased wound healing capabilities. This paper presents a method of delivering type I collagen into porcine and human skin utilizing a polyvinylpyrrolidone microneedle delivery system. The microneedle patches were made with concentrations of 1, 2, 4, and 8% type I collagen (w/w). Microneedle structures and the distribution of collagen were characterized using scanning electron microscopy and confocal microscopy. Patches were then applied on the porcine and human skin, and their effectiveness was examined using fluorescence microscopy. The results illustrate that this microneedle delivery system is effective in delivering collagen I into the epidermis and dermis of porcine and human skin. Since the technique presented in this paper is quick, safe, effective and easy, it can be considered as a new collagen delivery method for cosmetic and therapeutic applications.
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Affiliation(s)
- Wenchao Sun
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA.,Cardiovascular Pharmacology Division, Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Mohammed Inayathullah
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA.,Cardiovascular Pharmacology Division, Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Martin A C Manoukian
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA.,Department of Dermatology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Andrey V Malkovskiy
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA
| | - Sathish Manickam
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA
| | - M Peter Marinkovich
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, 94305, USA.,Division of Dermatology, Palo Alto VA Medical Center, Palo Alto, CA, 94304, USA
| | - Alfred T Lane
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Lobat Tayebi
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA.,Department of Developmental Sciences, Marquette University School of Dentistry, Milwaukee, WI, 53201, USA
| | - Alexander M Seifalian
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Jayakumar Rajadas
- Biomaterials and Advanced Drug Delivery Laboratory, Stanford University School of Medicine, 1050 Arastradero Road, Building A, Room A148, Palo Alto, CA, 94304, USA. .,Cardiovascular Pharmacology Division, Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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205
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Polymer microneedles fabricated from PCL and PCL/PEG blends for transdermal delivery of hydrophilic compounds. J Taiwan Inst Chem Eng 2015. [DOI: 10.1016/j.jtice.2015.01.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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206
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Edens C, Dybdahl-Sissoko NC, Weldon WC, Oberste MS, Prausnitz MR. Inactivated polio vaccination using a microneedle patch is immunogenic in the rhesus macaque. Vaccine 2015; 33:4683-90. [PMID: 25749246 DOI: 10.1016/j.vaccine.2015.01.089] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 01/27/2015] [Accepted: 01/29/2015] [Indexed: 11/26/2022]
Abstract
The phased replacement of oral polio vaccine (OPV) with inactivated polio vaccine (IPV) is expected to significantly complicate mass vaccination campaigns, which are an important component of the global polio eradication endgame strategy. To simplify mass vaccination with IPV, we developed microneedle patches that are easy to administer, have a small package size, generate no sharps waste and are inexpensive to manufacture. When administered to rhesus macaques, neutralizing antibody titers were equivalent among monkeys vaccinated using microneedle patches and conventional intramuscular injection for IPV types 1 and 2. Serologic response to IPV type 3 vaccination was weaker after microneedle patch vaccination compared to intramuscular injection; however, we suspect the administered type 3 dose was lower due to a flawed pre-production IPV type 3 analytical method. IPV vaccination using microneedle patches was well tolerated by the monkeys. We conclude that IPV vaccination using a microneedle patch is immunogenic in rhesus macaques and may offer a simpler method of IPV vaccination of people to facilitate polio eradication.
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Affiliation(s)
- Chris Edens
- Coulter Department of Biomedical Engineering at Georgia Tech and Emory University, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Naomi C Dybdahl-Sissoko
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - William C Weldon
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - M Steven Oberste
- Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Mark R Prausnitz
- Coulter Department of Biomedical Engineering at Georgia Tech and Emory University, Georgia Institute of Technology, Atlanta, GA 30332, USA; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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207
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A patchless dissolving microneedle delivery system enabling rapid and efficient transdermal drug delivery. Sci Rep 2015; 5:7914. [PMID: 25604728 PMCID: PMC4300505 DOI: 10.1038/srep07914] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 12/22/2014] [Indexed: 11/25/2022] Open
Abstract
Dissolving microneedles (DMNs) are polymeric, microscopic needles that deliver encapsulated drugs in a minimally invasive manner. Currently, DMN arrays are superimposed onto patches that facilitate their insertion into skin. However, due to wide variations in skin elasticity and the amount of hair on the skin, the arrays fabricated on the patch are often not completely inserted and large amount of loaded materials are not delivered. Here, we report “Microlancer”, a novel micropillar based system by which patients can self-administer DMNs and which would also be capable of achieving 97 ± 2% delivery efficiency of the loaded drugs regardless of skin type or the amount of hair on the skin in less than a second.
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208
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Xue P, Zhang X, Chuah YJ, Wu Y, Kang Y. Flexible PEGDA-based microneedle patches with detachable PVP–CD arrowheads for transdermal drug delivery. RSC Adv 2015. [DOI: 10.1039/c5ra09329e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A polymer-based microneedle patch with drug-loaded and detachable arrowhead tips for transdermal drug delivery.
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Affiliation(s)
- Peng Xue
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Xuyang Zhang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Yon Jin Chuah
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Yafeng Wu
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Yuejun Kang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
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209
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Justin R, Román S, Chen D, Tao K, Geng X, Grant RT, MacNeil S, Sun K, Chen B. Biodegradable and conductive chitosan–graphene quantum dot nanocomposite microneedles for delivery of both small and large molecular weight therapeutics. RSC Adv 2015. [DOI: 10.1039/c5ra04340a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chitosan–graphene quantum dot nanocomposites are used in microneedle arrays for transdermal delivery of small and large molecular weight drugs.
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Affiliation(s)
- Richard Justin
- Department of Materials Science and Engineering
- University of Sheffield
- Sheffield S1 3JD
- UK
| | - Sabiniano Román
- Department of Materials Science and Engineering
- University of Sheffield
- Sheffield S1 3JD
- UK
| | - Dexin Chen
- The State Key Laboratory of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Ke Tao
- The State Key Laboratory of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Xiangshuai Geng
- Department of Materials Science and Engineering
- University of Sheffield
- Sheffield S1 3JD
- UK
| | - Richard T. Grant
- Department of Physics and Astronomy
- University of Sheffield
- Sheffield S3 7RH
- UK
| | - Sheila MacNeil
- Department of Materials Science and Engineering
- University of Sheffield
- Sheffield S1 3JD
- UK
| | - Kang Sun
- The State Key Laboratory of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Biqiong Chen
- Department of Materials Science and Engineering
- University of Sheffield
- Sheffield S1 3JD
- UK
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210
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Affiliation(s)
- Karmen Cheung
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, UK
| | - Diganta B. Das
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, UK
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211
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Wang Q, Yao G, Dong P, Gong Z, Li G, Zhang K, Wu C. Investigation on fabrication process of dissolving microneedle arrays to improve effective needle drug distribution. Eur J Pharm Sci 2014; 66:148-56. [PMID: 25446513 DOI: 10.1016/j.ejps.2014.09.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/12/2014] [Accepted: 09/10/2014] [Indexed: 01/27/2023]
Abstract
The dissolving microneedle array (DMNA) offers a novel potential approach for transdermal delivery of biological macromolecular drugs and vaccines, because it can be as efficient as hypodermic injection and as safe and patient compliant as conventional transdermal delivery. However, effective needle drug distribution is the main challenge for clinical application of DMNA. This study focused on the mechanism and control of drug diffusion inside DMNA during the fabrication process in order to improve the drug delivery efficiency. The needle drug loading proportion (NDP) in DMNAs was measured to determine the influences of drug concentration gradient, needle drying step, excipients, and solvent of the base solution on drug diffusion and distribution. The results showed that the evaporation of base solvent was the key factor determining NDP. Slow evaporation of water from the base led to gradual increase of viscosity, and an approximate drug concentration equilibrium was built between the needle and base portions, resulting in NDP as low as about 6%. When highly volatile ethanol was used as the base solvent, the viscosity in the base rose quickly, resulting in NDP more than 90%. Ethanol as base solvent did not impact the insertion capability of DMNAs, but greatly increased the in vitro drug release and transdermal delivery from DMNAs. Furthermore, the drug diffusion process during DMNA fabrication was thoroughly investigated for the first time, and the outcomes can be applied to most two-step molding processes and optimization of the DMNA fabrication.
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Affiliation(s)
- Qingqing Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China; Department of Pharmacy, Bengbu Medical College, Bengbu, China
| | - Gangtao Yao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Pin Dong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zihua Gong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ge Li
- Guangzhou Neworld Co. Ltd., Guangzhou, China
| | - Kejian Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Chuanbin Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China; GuangDong Research Center for Drug Delivery Systems, Guangzhou, China.
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212
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Yan L, Yang Y, Zhang W, Chen X. Advanced materials and nanotechnology for drug delivery. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5533-5540. [PMID: 24449177 DOI: 10.1002/adma.201305683] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 12/02/2013] [Indexed: 06/03/2023]
Abstract
Many biological barriers are of great importance. For example, stratum corneum, the outmost layer of skin, effectively protects people from being invaded by external microorganisms such as bacteria and viruses. Cell membranes help organisms maintain homeostasis by controlling substances to enter and leave cells. However, on the other hand, these biological barriers seriously restrict drug delivery. For instance, stratum corneum has a very dense structure and only allows very small molecules with a molecular weight of below 500 Da to permeate whereas most drug molecules are much larger than that. A wide variety of drugs including genes needs to enter cells for proper functioning but cell membranes are not permeable to them. To overcome these biological barriers, many drug-delivery routes are being actively researched and developed. In this research news, we will focus on two advanced materials and nanotechnology approaches for delivering vaccines through the skin for painless and efficient immunization and transporting drug molecules to cross cell membranes for high-throughput intracellular delivery.
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Affiliation(s)
- Li Yan
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China
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213
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Aliyar H, Huber R, Loubert G, Schalau G. Efficient Ibuprofen Delivery from Anhydrous Semisolid Formulation Based on a Novel Cross-linked Silicone Polymer Network: An In Vitro and In Vivo Study. J Pharm Sci 2014; 103:2005-2011. [DOI: 10.1002/jps.23990] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 04/04/2014] [Accepted: 04/07/2014] [Indexed: 11/05/2022]
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214
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Park SY, Lee HU, Lee YC, Kim GH, Park EC, Han SH, Lee JG, Choi S, Heo NS, Kim DL, Huh YS, Lee J. Wound healing potential of antibacterial microneedles loaded with green tea extracts. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:757-62. [PMID: 25063177 DOI: 10.1016/j.msec.2014.06.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 05/13/2014] [Accepted: 06/16/2014] [Indexed: 01/13/2023]
Abstract
This study evaluates the utility of an antibacterial microneedle composed of green tea (GT) extract and hyaluronic acid (HA), for the efficient delivery of GT. These microneedles have the potential to be a patient-friendly method for the conventional sustained release of drugs. In this study, a fabrication method using a mold-based technique to produce GT/HA microneedles with a maximum area of ~50mm(2) with antibacterial properties was used to manufacture transdermal drug delivery systems. Fourier transform infrared (FTIR) spectrometry was carried out to observe the potential modifications in the microneedles, when incorporated with GT. The degradation rate of GT in GT/HA microneedles was controlled simply by adjusting the HA composition. The effects of different ratios of GT in the HA microneedles were determined by measuring the release properties. In HA microneedles loaded with 70% GT (GT70), a continuous higher release rate was sustained for 72h. The in vitro cytotoxicity assays demonstrated that GT/HA microneedles were not generally cytotoxic to Chinese hamster ovary cells (CHO-K1), human embryonic kidney cells (293T), and mouse muscle cells (C2C12), which were treated for 12 and 24h. Antimicrobial activity of the GT/HA microneedles was demonstrated by ~95% growth reduction of gram negative [Escherichia coli (E. coli), Pseudomonas putida (P. putida), and Salmonella typhimurium (S. typhimurium)] and gram positive bacteria [Staphylococcus aureus (S. Aureus) and Bacillus subtilis (B. subtilis)], with GT70. Furthermore, GT/HA microneedles reduced bacterial growth of infected wound sites in the skin and improved wound healing process of skin in rat model.
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Affiliation(s)
- So Young Park
- Division of Materials Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Hyun Uk Lee
- Division of Materials Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea.
| | - Young-Chul Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 461-701, Republic of Korea
| | - Gun Hwa Kim
- Division of Life Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Edmond Changkyun Park
- Division of Life Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | | | - Jeong Gyu Lee
- Small Lab Co., Ltd., Daejeon 305-509, Republic of Korea
| | - Saehae Choi
- College of Pharmacy, Chungbuk National University, Cheongju 361-763, Republic of Korea
| | - Nam Su Heo
- R&D Center, Sugentech, Inc., Daejeon Bioventure Town 461-8, Daejeon 305-811, Republic of Korea
| | - Dong Lak Kim
- Division of Materials Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Yun Suk Huh
- Department of Biological Engineering, College of Engineering, Inha University, Incheon 402-751, Republic of Korea
| | - Jouhahn Lee
- Division of Materials Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea.
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215
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Vivek R, Thangam R, NipunBabu V, Rejeeth C, Sivasubramanian S, Gunasekaran P, Muthuchelian K, Kannan S. Multifunctional HER2-antibody conjugated polymeric nanocarrier-based drug delivery system for multi-drug-resistant breast cancer therapy. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6469-80. [PMID: 24780315 DOI: 10.1021/am406012g] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Nanotechnology-based medical approaches have made tremendous potential for enhancing the treatment efficacy with minimal doses of chemotherapeutic drugs against cancer. In this study, using tamoxifen (Tam), biodegradable antibody conjugated polymeric nanoparticles (NPs) was developed to achieve targeted delivery as well as sustained release of the drug against breast cancer cells. Poly(D,L-lactic-co-glycolic acid) (PLGA) NPs were stabilized by coating with poly(vinyl alcohol) (PVA), and copolymer polyvinyl-pyrrolidone (PVP) was used to conjugate herceptin (antibody) with PLGA NPs for promoting the site-specific intracellular delivery of Tam against HER2 receptor overexpressed breast cancer (MCF-7) cells. The Tam-loaded PVP-PLGA NPs and herceptin-conjugated Tam-loaded PVP-PLGA NPs were characterized in terms of morphology, size, surface charge, and structural chemistry by dynamic light scattering (DLS), Transmission electron microscopy (TEM), ζ potential analysis, 1H nuclear magnetic resonance (NMR), and Fourier transform infrared (FT-IR) spectroscopy. pH-based drug release property and the anticancer activity (in vitro and in vivo models) of the herceptin conjugated polymeric NPs were evaluated by flow cytometry and confocal image analysis. Besides, the extent of cellular uptake of drug via HER2 receptor-mediated endocytosis by herceptin-conjugated Tam-loaded PVP-PLGA NPs was examined. Furthermore, the possible signaling pathway of apoptotic induction in MCF-7 cells was explored by Western blotting, and it was demonstrated that drug-loaded PLGA NPs were capable of inducing apoptosis in a caspase-dependent manner. Hence, this nanocarrier drug delivery system (DDS) not only actively targets a multidrug-resistance (MDR) associated phenotype (HER2 receptor overexpression) but also improves therapeutic efficiency by enhancing the cancer cell targeted delivery and sustained release of therapeutic agents.
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Affiliation(s)
- Raju Vivek
- Proteomics & Molecular Cell Physiology Laboratory, Department of Zoology, School of Life Sciences, Bharathiar University , Coimbatore 641 046, Tamilnadu, India
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216
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Yan L, Raphael AP, Zhu X, Wang B, Chen W, Tang T, Deng Y, Sant HJ, Zhu G, Choy KW, Gale BK, Prow TW, Chen X. Nanocomposite-strengthened dissolving microneedles for improved transdermal delivery to human skin. Adv Healthc Mater 2014; 3:555-64. [PMID: 24173960 DOI: 10.1002/adhm.201300312] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Indexed: 01/03/2023]
Abstract
Delivery of drugs and biomolecules into skin has significant advantages. To achieve this, herein, a nanomaterial-strengthened dissolving microneedle patch for transdermal delivery is reported. The patch comprises thousands of microneedles, which are composed of dissolving polymers, nanomaterials, and drug/biomolecules in their interior. With the addition of nanomaterials, the mechanical property of generally weak dissolving polymers can be dramatically improved without sacrificing dissolution rate within skin. In this experiments, layered double hydroxides (LDH) nanoparticles are incorporated into sodium carboxymethylcellulose (CMC) to form a nanocomposite. The results show that, by adding 5 wt% of LDH nanoparticles into CMC, the mechanical strength significantly increased. Small and densely packed CMC-LDH microneedles penetrate human and pig skin more reliably than pure CMC ones and attractively the nanocomposite-strengthened microneedles dissolve in skin and release payload within only 1 min. Finally, the application of using the nanocomposite-strengthened microneedle arrays is tested for in vivo vaccine delivery and the results show that significantly stronger antibody response could be induced when compared with subcutaneous injection. These data suggest that nanomaterials could be useful for fabricating densely packed and small polymer microneedles that have robust mechanical properties and rapid dissolution rates and therefore potential use in clinical applications.
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Affiliation(s)
- Li Yan
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science; City University of Hong Kong; Hong Kong SAR
| | - Anthony P. Raphael
- Dermatology Research Centre; The University of Queensland, School of Medicine, Translational Research Institute; Brisbane Australia
| | - Xiaoyue Zhu
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science; City University of Hong Kong; Hong Kong SAR
| | - Beilei Wang
- Department of Biology and Chemistry; City University of Hong Kong; Hong Kong SAR
| | - Wei Chen
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science; City University of Hong Kong; Hong Kong SAR
| | - Tao Tang
- Department of Obstetrics & Gynaecology; The Chinese University of Hong Kong Hong Kong SAR; CUHK Shenzhen Research Institute Shenzhen China
| | - Yan Deng
- Department of Obstetrics & Gynaecology; The Chinese University of Hong Kong Hong Kong SAR; CUHK Shenzhen Research Institute Shenzhen China
| | - Himanshu J. Sant
- State of Utah Center of Excellence for Biomedical Microfluidics Departments of Bioengineering and Mechanical Engineering; University of Utah; Salt Lake, City UT 84112 USA
| | - Guangyu Zhu
- Department of Biology and Chemistry; City University of Hong Kong; Hong Kong SAR
| | - Kwong Wai Choy
- Department of Obstetrics & Gynaecology; The Chinese University of Hong Kong Hong Kong SAR; CUHK Shenzhen Research Institute Shenzhen China
| | - Bruce K. Gale
- State of Utah Center of Excellence for Biomedical Microfluidics Departments of Bioengineering and Mechanical Engineering; University of Utah; Salt Lake, City UT 84112 USA
| | - Tarl W. Prow
- Dermatology Research Centre; The University of Queensland, School of Medicine, Translational Research Institute; Brisbane Australia
| | - Xianfeng Chen
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science; City University of Hong Kong; Hong Kong
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McCrudden MTC, Torrisi BM, Al-Zahrani S, McCrudden CM, Zaric M, Scott CJ, Kissenpfennig A, McCarthy HO, Donnelly RF. Laser-engineered dissolving microneedle arrays for protein delivery: potential for enhanced intradermal vaccination. ACTA ACUST UNITED AC 2014; 67:409-25. [PMID: 24673568 DOI: 10.1111/jphp.12248] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 02/23/2014] [Indexed: 11/28/2022]
Abstract
OBJECTIVES We aimed to highlight the utility of novel dissolving microneedle (MN)-based delivery systems for enhanced transdermal protein delivery. Vaccination remains the most accepted and effective approach in offering protection from infectious diseases. In recent years, much interest has focused on the possibility of using minimally invasive MN technologies to replace conventional hypodermic vaccine injections. METHODS The focus of this study was exploitation of dissolving MN array devices fabricated from 20% w/w poly(methyl vinyl ether/maleic acid) using a micromoulding technique, for the facilitated delivery of a model antigen, ovalbumin (OVA). KEY FINDINGS A series of in-vitro and in-vivo experiments were designed to demonstrate that MN arrays loaded with OVA penetrated the stratum corneum and delivered their payload systemically. The latter was evidenced by the activation of both humoral and cellular inflammatory responses in mice, indicated by the production of immunoglobulins (IgG, IgG1, IgG2a) and inflammatory cytokines, specifically interferon-gamma and interleukin-4. Importantly, the structural integrity of the OVA following incorporation into the MN arrays was maintained. CONCLUSION While enhanced manufacturing strategies are required to improve delivery efficiency and reduce waste, dissolving MN are a promising candidate for 'reduced-risk' vaccination and protein delivery strategies.
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218
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Garland MJ, Migalska K, Mahmood TMT, Singh TRR, Woolfson AD, Donnelly RF. Microneedle arrays as medical devices for enhanced transdermal drug delivery. Expert Rev Med Devices 2014; 8:459-82. [DOI: 10.1586/erd.11.20] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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219
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Chen W, Wang C, Yan L, Huang L, Zhu X, Chen B, Sant HJ, Niu X, Zhu G, Yu KN, Roy VAL, Gale BK, Chen X. Improved polyvinylpyrrolidone microneedle arrays with non-stoichiometric cyclodextrin. J Mater Chem B 2014; 2:1699-1705. [DOI: 10.1039/c3tb21698e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Improved polyvinylpyrrolidone (PVP) microneedle arrays can be fabricated by adding cyclodextrin (CD) to form PVP–CD inclusion complexes.
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Affiliation(s)
- Wei Chen
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
| | - Chong Wang
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
| | - Li Yan
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
| | - Longbiao Huang
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
| | - Xiaoyue Zhu
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
| | - Bing Chen
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- , P. R. China
| | - Himanshu J. Sant
- State of Utah Center of Excellence for Biomedical Microfluidics
- Departments of Bioengineering and Mechanical Engineering
- University of Utah
- Salt Lake City, USA
| | - Xinrui Niu
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- , P. R. China
| | - Guangyu Zhu
- Department of Biology and Chemistry
- City University of Hong Kong
- , P. R. China
| | - K. N. Yu
- Department of Physics and Materials Science
- City University of Hong Kong
- , P. R. China
| | - V. A. L. Roy
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
| | - Bruce K. Gale
- State of Utah Center of Excellence for Biomedical Microfluidics
- Departments of Bioengineering and Mechanical Engineering
- University of Utah
- Salt Lake City, USA
| | - Xianfeng Chen
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- , P. R. China
- Department of Physics and Materials Science
- City University of Hong Kong
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220
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Bediz B, Korkmaz E, Khilwani R, Donahue C, Erdos G, Falo LD, Ozdoganlar OB. Dissolvable microneedle arrays for intradermal delivery of biologics: fabrication and application. Pharm Res 2014; 31:117-35. [PMID: 23904139 PMCID: PMC3898465 DOI: 10.1007/s11095-013-1137-x] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 06/24/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE Design and evaluate a new micro-machining based approach for fabricating dissolvable microneedle arrays (MNAs) with diverse geometries and from different materials for dry delivery to skin microenvironments. The aims are to describe the new fabrication method, to evaluate geometric and material capability as well as reproducibility of the method, and to demonstrate the effectiveness of fabricated MNAs in delivering bioactive molecules. METHODS Precise master molds were created using micromilling. Micromolding was used to create elastomer production molds from master molds. The dissolvable MNAs were then fabricated using the spin-casting method. Fabricated MNAs with different geometries were evaluated for reproducibility. MNAs from different materials were fabricated to show material capability. MNAs with embedded bioactive components were tested for functionality on human and mice skin. RESULTS MNAs with different geometries and from carboxymethyl cellulose, polyvinyl pyrrolidone and maltodextrin were created reproducibly using our method. MNAs successfully pierce the skin, precisely deliver their bioactive cargo to skin and induce specific immunity in mice. CONCLUSIONS We demonstrated that the new fabrication approach enables creating dissolvable MNAs with diverse geometries and from different materials reproducibly. We also demonstrated the application of MNAs for precise and specific delivery of biomolecules to skin microenvironments in vitro and in vivo.
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Affiliation(s)
- Bekir Bediz
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh, Pennsylvania 15213, USA
| | - Emrullah Korkmaz
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh, Pennsylvania 15213, USA
| | - Rakesh Khilwani
- Department of Mechanical Engineering, Carnegie Mellon University Pittsburgh, Pennsylvania 15213, USA
| | - Cara Donahue
- Department of Dermatology, University of Pittsburgh School of Medicine Pittsburgh, Pennsylvania 15213, USA
| | - Geza Erdos
- Department of Dermatology, University of Pittsburgh School of Medicine Pittsburgh, Pennsylvania 15213, USA
| | - Louis D. Falo
- Department of Dermatology; Department of Bioengineering, Pittsburgh Clinical and Translational Science Institute, The McGowan Institute for Regenerative Medicine, and the University of Pittsburgh Cancer Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA
| | - O. Burak Ozdoganlar
- Departments of Mechanical Engineering, Biomedical Engineering, and Materials Science and Engineering, Carnegie Mellon University, Pittsburgh Pennsylvania 15213, USA
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221
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Donnelly RF, Garland MJ, Alkilani AZ. Microneedle-iontophoresis combinations for enhanced transdermal drug delivery. Methods Mol Biol 2014; 1141:121-32. [PMID: 24567135 DOI: 10.1007/978-1-4939-0363-4_7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
It has recently been proposed that the combination of skin barrier impairment using microneedles (MNs) coupled with iontophoresis (ITP) may broaden the range of drugs suitable for transdermal delivery as well as enabling the rate of delivery to be achieved with precise electronic control. However, few reports exist on the combination of ITP with in situ drug-loaded polymeric MN delivery systems. Our in vitro permeation studies revealed that MN enhances transdermal drug delivery. The combination of dissolving MN and ITP did not further enhance the extent of delivery of the low molecular weight drug ibuprofen sodium after short application periods. However, the extent of peptide/protein delivery was significantly enhanced when ITP was used in combination with hydrogel-forming MN arrays. As such, hydrogel-forming MN arrays show promise for the electrically controlled transdermal delivery of biomacromolecules in a simple, one-step approach, though further technical developments will be necessary before patient benefit is realized.
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Affiliation(s)
- Ryan F Donnelly
- Medical Biology Centre, School of Pharmacy, Queen's University Belfast, Belfast, UK
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222
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Tuan-Mahmood TM, McCrudden MT, Torrisi BM, McAlister E, Garland MJ, Singh TRR, Donnelly RF. Microneedles for intradermal and transdermal drug delivery. Eur J Pharm Sci 2013; 50:623-37. [PMID: 23680534 PMCID: PMC4119996 DOI: 10.1016/j.ejps.2013.05.005] [Citation(s) in RCA: 258] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 05/04/2013] [Accepted: 05/05/2013] [Indexed: 12/22/2022]
Abstract
The formidable barrier properties of the uppermost layer of the skin, the stratum corneum, impose significant limitations for successful systemic delivery of broad range of therapeutic molecules particularly macromolecules and genetic material. Microneedle (MN) has been proposed as a strategy to breach the stratum corneum barrier function in order to facilitate effective transport of molecules across the skin. This strategy involves use of micron sized needles fabricated of different materials and geometries to create transient aqueous conduits across the skin. MN, alone or with other enhancing strategies, has been demonstrated to dramatically enhance the skin permeability of numerous therapeutic molecules including biopharmaceuticals either in vitro, ex vivo or in vivo experiments. This suggested the promising use of MN technology for various possible clinical applications such as insulin delivery, transcutaneous immunisations and cutaneous gene delivery. MN has been proved as minimally invasive and painless in human subjects. This review article focuses on recent and future developments for MN technology including the latest type of MN design, challenges and strategies in MNs development as well as potential safety aspects based on comprehensive literature review pertaining to MN studies to date.
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Affiliation(s)
- Tuan-Mazlelaa Tuan-Mahmood
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
- Faculty of Pharmacy, The National University of Malaysia (UKM), Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia
| | - Maeliosa T.C. McCrudden
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
| | - Barbara M. Torrisi
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
| | - Emma McAlister
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
| | - Martin J Garland
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
| | - Thakur Raghu Raj Singh
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
| | - Ryan F Donnelly
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, UK
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223
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Bubendorfer AJ, Ingham B, Kennedy JV, Arnold WM. Contamination of PDMS microchannels by lithographic molds. LAB ON A CHIP 2013; 13:4312-4316. [PMID: 24080639 DOI: 10.1039/c3lc50641j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
By use of synchrotron X-ray fluorescence and Rutherford backscattering spectrometry, we show the SU-8 soft lithographic process contaminates PDMS. Residues of the antimony containing photoinitiator are transferred from the master mold to the surface of PDMS, uncontrollably intensifying the surface potential, leading to electroosmotic flow variability in PDMS microfluidic devices.
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224
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Raja WK, Maccorkle S, Diwan IM, Abdurrob A, Lu J, Omenetto FG, Kaplan DL. Transdermal delivery devices: fabrication, mechanics and drug release from silk. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:3704-13. [PMID: 23653252 PMCID: PMC3883884 DOI: 10.1002/smll.201202075] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 01/18/2013] [Indexed: 05/22/2023]
Abstract
Microneedles are a relatively simple, minimally invasive and painless approach to deliver drugs across the skin. However, there remain limitations with this approach because of the materials most commonly utilized for such systems. Silk protein, with tunable and biocompatibility properties, is a useful biomaterial to overcome the current limitations with microneedles. Silk devices preserve drug activity, offer superior mechanical properties and biocompatibility, can be tuned for biodegradability, and can be processed under aqueous, benign conditions. In the present work, the fabrication of dense microneedle arrays from silk with different drug release kinetics is reported. The mechanical properties of the microneedle patches are tuned by post-fabrication treatments or by loading the needles with silk microparticles, to increase capacity and mechanical strength. Drug release is further enhanced by the encapsulation of the drugs in the silk matrix and coating with a thin dissolvable drug layer. The microneedles are used on human cadaver skin and drugs are delivered successfully. The various attributes demonstrated suggest that silk-based microneedle devices can provide significant benefit as a platform material for transdermal drug delivery.
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Affiliation(s)
- Waseem K Raja
- Biomedical Engineering, Science and Technology Center, Tufts University, 4 Colby Street, Medford, MA 02155, USA
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225
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Demir YK, Akan Z, Kerimoglu O. Characterization of polymeric microneedle arrays for transdermal drug delivery. PLoS One 2013; 8:e77289. [PMID: 24194879 PMCID: PMC3806750 DOI: 10.1371/journal.pone.0077289] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Accepted: 09/01/2013] [Indexed: 12/13/2022] Open
Abstract
Microfabrication of dissolvable, swellable, and biodegradable polymeric microneedle arrays (MNs) were extensively investigated based in a nano sensitive fabrication style known as micromilling that is then combined with conventional micromolding technique. The aim of this study was to describe the polymer selection, and optimize formulation compounding parameters for various polymeric MNs. Inverse replication of micromilled master MNs reproduced with polydimethylsiloxane (PDMS), where solid out of plane polymeric MNs were subsequently assembled, and physicochemically characterized. Dissolvable, swellable, and biodegradable MNs were constructed to depth of less than 1 mm with an aspect ratio of 3.6, and 1/2 mm of both inter needle tip and base spacing. Micromolding step also enabled to replicate the MNs very precisely and accurate. Polymeric microneedles (MN) precision was ranging from ± 0.18 to ± 1.82% for microneedle height, ± 0.45 to ± 1.42% for base diameter, and ± 0.22 to ± 0.95% for interbase spacing. Although dissolvable sodium alginate MN showed less physical robustness than biodegradable polylactic-co-glycolic acid MN, their thermogravimetric analysis is of promise for constructing these polymeric types of matrix devices.
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Affiliation(s)
- Yusuf K. Demir
- Department of Pharmaceutical Technology, Marmara University Faculty of Pharmacy, Istanbul, Turkey
| | - Zafer Akan
- Department of Biophysics, Celal Bayar University School of Medicine, Manisa, Turkey
| | - Oya Kerimoglu
- Department of Pharmaceutical Technology, Marmara University Faculty of Pharmacy, Istanbul, Turkey
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226
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Moga KA, Bickford LR, Geil RD, Dunn SS, Pandya AA, Wang Y, Fain JH, Archuleta CF, O’Neill AT, DeSimone JM. Rapidly-dissolvable microneedle patches via a highly scalable and reproducible soft lithography approach. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:5060-6. [PMID: 23893866 PMCID: PMC4262250 DOI: 10.1002/adma.201300526] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 06/05/2013] [Indexed: 05/22/2023]
Abstract
Microneedle devices for transdermal drug delivery have recently become an attractive method to overcome the diffusion-limiting epidermis and effectively transport therapeutics to the body. Here, we demonstrate the fabrication of highly reproducible and completely dissolvable polymer microneedles on flexible water-soluble substrates. These biocompatible microneedles (made by using a soft lithography process known as PRINT) showed efficacy in piercing both murine and human skin samples and delivering a fluorescent drug surrogate to the tissue.
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Affiliation(s)
| | | | - Robert D. Geil
- Institute for Advanced Materials, NanoScience and Technology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Stuart S. Dunn
- Department of Chemistry, University of North Carolina at Chapel Hill, CB #3290, Caudill Labs, Chapel Hill, NC 27599
| | - Ashish A. Pandya
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Yapei Wang
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - John H. Fain
- Department of Chemistry, University of North Carolina at Chapel Hill, CB #3290, Caudill Labs, Chapel Hill, NC 27599
| | - Christine F. Archuleta
- Department of Chemistry, University of North Carolina at Chapel Hill, CB #3290, Caudill Labs, Chapel Hill, NC 27599
| | - Adrian T. O’Neill
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Joseph M. DeSimone
- Department of Chemistry, University of North Carolina at Chapel Hill, CB #3290, Caudill Labs, Chapel Hill, NC 27599
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
- Institute for Advanced Materials, NanoScience and Technology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
- Department of Pharmacology, Eshelman School of Pharmacy, Carolina Center for Nanotechnology Excellence, Institute for Nanomedicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695
- Sloan-Kettering Institute for Cancer Research, Memorial Sloan-Kettering Cancer Center, New York, New York, 10021
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227
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Kim JD, Kim M, Yang H, Lee K, Jung H. Droplet-born air blowing: Novel dissolving microneedle fabrication. J Control Release 2013; 170:430-6. [DOI: 10.1016/j.jconrel.2013.05.026] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/20/2013] [Accepted: 05/27/2013] [Indexed: 10/26/2022]
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228
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McGrath MG, Vucen S, Vrdoljak A, Kelly A, O'Mahony C, Crean AM, Moore A. Production of dissolvable microneedles using an atomised spray process: effect of microneedle composition on skin penetration. Eur J Pharm Biopharm 2013; 86:200-11. [PMID: 23727511 DOI: 10.1016/j.ejpb.2013.04.023] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 04/26/2013] [Accepted: 04/30/2013] [Indexed: 10/26/2022]
Abstract
Dissolvable microneedles offer an attractive delivery system for transdermal drug and vaccine delivery. They are most commonly formed by filling a microneedle mold with liquid formulation using vacuum or centrifugation to overcome the constraints of surface tension and solution viscosity. Here, we demonstrate a novel microneedle fabrication method employing an atomised spray technique that minimises the effects of the liquid surface tension and viscosity when filling molds. This spray method was successfully used to fabricate dissolvable microneedles (DMN) from a wide range of sugars (trehalose, fructose and raffinose) and polymeric materials (polyvinyl alcohol, polyvinylpyrrolidone, carboxymethylcellulose, hydroxypropylmethylcellulose and sodium alginate). Fabrication by spraying produced microneedles with amorphous content using single sugar compositions. These microneedles displayed sharp tips and had complete fidelity to the master silicon template. Using a method to quantify the consistency of DMN penetration into different skin layers, we demonstrate that the material of construction significantly influenced the extent of skin penetration. We demonstrate that this spraying method can be adapted to produce novel laminate-layered as well as horizontally-layered DMN arrays. To our knowledge, this is the first report documenting the use of an atomising spray, at ambient, mild processing conditions, to create dissolvable microneedle arrays that can possess novel, laminate layering.
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Affiliation(s)
| | - Sonja Vucen
- School of Pharmacy, University College Cork, Cork, Ireland.
| | - Anto Vrdoljak
- School of Pharmacy, University College Cork, Cork, Ireland.
| | - Adam Kelly
- School of Pharmacy, University College Cork, Cork, Ireland.
| | - Conor O'Mahony
- Tyndall National Institute, University College Cork, Cork, Ireland.
| | - Abina M Crean
- School of Pharmacy, University College Cork, Cork, Ireland.
| | - Anne Moore
- School of Pharmacy, University College Cork, Cork, Ireland; Dept. of Pharmacology, University College Cork, Cork, Ireland.
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229
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Potential of biodegradable microneedles as a transdermal delivery vehicle for lidocaine. Biotechnol Lett 2013; 35:1351-63. [DOI: 10.1007/s10529-013-1217-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 05/01/2013] [Indexed: 12/16/2022]
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230
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Otto DP, de Villiers MM. The experimental evaluation and molecular dynamics simulation of a heat-enhanced transdermal delivery system. AAPS PharmSciTech 2013; 14:111-20. [PMID: 23229382 DOI: 10.1208/s12249-012-9900-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 11/20/2012] [Indexed: 11/30/2022] Open
Abstract
Transdermal delivery systems are useful in cases where preferred routes such as the oral route are not available. However, low overall extent of delivery is seen due to the permeation barrier posed by the skin. Chemical penetration enhancers and invasive methods that disturb the structural barrier function of the skin can be used to improve transdermal drug delivery. However, for suitable drugs, a fast-releasing transdermal delivery system can be produced by incorporating a heating source into a transdermal patch. In this study, a molecular dynamics simulation showed that heat increased the diffusivity of the drug molecules, resulting in faster release from gels containing ketoprofen, diclofenac sodium, and lidocaine HCl. Simulations were confirmed by in vitro drug release studies through lipophilic membranes. These correlations could expand the application of heated transdermal delivery systems for use as fast-release-dosage forms.
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231
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Guo L, Chen J, Qiu Y, Zhang S, Xu B, Gao Y. Enhanced transcutaneous immunization via dissolving microneedle array loaded with liposome encapsulated antigen and adjuvant. Int J Pharm 2013; 447:22-30. [PMID: 23410987 DOI: 10.1016/j.ijpharm.2013.02.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 01/06/2013] [Accepted: 02/03/2013] [Indexed: 11/28/2022]
Abstract
Transcutaneous immunization (TCI) with dissolving microneedle arrays (DMAs) is a promising vaccine administration method. In this work, we developed a TCI device consisting of dissolving polyvinylpyrrolidone (PVP) microneedles array, where in the tips are loaded with antigen and adjuvant encapsulated in liposomes. The microneedles could effectively be inserted into the skin and completely dissolve within 3 min. As a test-case, we selected ovalbumin (OVA) as a model antigen, CpG OND as adjuvant and cationic liposome (Lip) as a microparticulate vehicle for co-deliver antigens and adjuvant. Mice were immunized transcutaneously with DMAs containing OVA, OVA-CpG OND, OVA encapsulated in Lip, OVA-CpG OND encapsulated in Lip and conventional intramuscular injection (IM) with OVA solution, respectively. The results show that the anti-OVA IgG antibody level in the group immunized with the DMA containing OVA-CpG OND encapsulated in Lip was significantly higher than that of the other groups. Furthermore, it significantly increased the level of IgG2a (P<0.05) and achieved the shift of immune type from predominate Th2 type to a balance Th1/Th2 type. In conclusion, the DMA TCI device can effectively deliver the Lip encapsulating CpG OND-OVA into skin, enhancing the immune response and change the immune type.
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Affiliation(s)
- Lei Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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232
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DeMuth PC, Garcia-Beltran WF, Ai-Ling ML, Hammond PT, Irvine DJ. Composite dissolving microneedles for coordinated control of antigen and adjuvant delivery kinetics in transcutaneous vaccination. ADVANCED FUNCTIONAL MATERIALS 2013; 23:161-172. [PMID: 23503923 PMCID: PMC3595545 DOI: 10.1002/adfm.201201512] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Indexed: 05/17/2023]
Abstract
Transcutaneous administration has the potential to improve therapeutics delivery, providing an approach that is safer and more convenient than traditional alternatives, while offering the opportunity for improved therapeutic efficacy through sustained/controlled drug release. To this end, we demonstrate a microneedle materials platform for rapid implantation of controlled-release polymer depots into the cutaneous tissue. Arrays of microneedles comprised of drug-loaded poly(lactide-co-glycolide) (PLGA) microparticles or solid PLGA tips were prepared with a supporting and rapidly water-soluble poly(acrylic acid) (PAA) matrix. Upon application of microneedle patches to the skin of mice, the microneedles perforated the stratum corneum and epidermis. Penetration of the outer skin layers was followed by rapid dissolution of the PAA binder on contact with the interstitial fluid of the epidermis, implanting the microparticles or solid polymer microneedles in the tissue, which were retained following patch removal. These polymer depots remained in the skin for weeks following application and sustained the release of encapsulated cargos for systemic delivery. To show the utility of this approach we demonstrated the ability of these composite microneedle arrays to deliver a subunit vaccine formulation. In comparison to traditional needle-based vaccination, microneedle delivery gave improved cellular immunity and equivalent generation of serum antibodies, suggesting the potential of this approach for vaccine delivery. However, the flexibility of this system should allow for improved therapeutic delivery in a variety of diverse contexts.
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Affiliation(s)
- Peter C DeMuth
- Department of Biological Engineering, Massachusetts Institute of Technology77 Massachusetts Ave., Cambridge, MA 02139, USA
| | - Wilfredo F Garcia-Beltran
- Program in Health Sciences and Technology, Massachusetts Institute of Technology77 Massachusetts Ave., Cambridge, MA 02139, USA
| | | | - Paula T Hammond
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology77 Massachusetts Ave., Cambridge, MA 02139, USA
| | - Darrell J Irvine
- Department of Biological Engineering, Massachusetts Institute of Technology77 Massachusetts Ave., Cambridge, MA 02139, USA
- Department of Materials Science and Engineering, Department of Biological Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology77 Massachusetts Ave., Cambridge, MA 02139, USA
- Ragon Institute of MIT, MGH, and HarvardBoston, MA 02139, USA
- Howard Hughes Medical Institute4000 Jones Bridge Rd., Chevy Chase, MD 20815, USA
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234
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Demir YK, Akan Z, Kerimoglu O. WITHDRAWN: Microfabrication of dissolvable, swellable, and biodegradable polymeric microneedle arrays. Int J Pharm 2012:S0378-5173(12)01059-9. [PMID: 23262420 DOI: 10.1016/j.ijpharm.2012.11.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Revised: 11/22/2012] [Accepted: 11/26/2012] [Indexed: 11/25/2022]
Abstract
This article has been withdrawn at the request of the authors. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Yusuf K Demir
- Department of Pharmaceutical Technology, Marmara University Faculty of Pharmacy,Istanbul 34668,Turkey.
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235
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Abstract
A microneedle system has been developed to deliver chemical and biological agents through the stratum corneum, which is the main barrier to drug delivery. Recently, microneedles have been fabricated from various kinds of polymers, including biocompatible polymer, biodegradable polymer, and water-soluble polymer. Polymer microneedles offer the benefits of ease of fabrication, cost-effectiveness, and mass production, as well as controlled drug release using the water solubility and degradation properties of polymer. In this review, the key features of polymer microneedles are discussed, including fabrication, materials, mechanical properties, drug delivery properties, and applications. Polymer microneedles provide a promising method for transdermal drug delivery by utilizing various physical and chemical properties of polymer.
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Affiliation(s)
- Jeong Woo Lee
- a School of Chemical and Biomolecular Engineering, Georgia Institute of Technology , Atlanta, GA 30332, USA
| | - Mee-Ree Han
- b Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University , Seongnam, Gyeonggi-Do, Republic of Korea
| | - Jung-Hwan Park
- b Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University , Seongnam, Gyeonggi-Do, Republic of Korea
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236
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Chen MC, Ling MH, Lai KY, Pramudityo E. Chitosan Microneedle Patches for Sustained Transdermal Delivery of Macromolecules. Biomacromolecules 2012; 13:4022-31. [DOI: 10.1021/bm301293d] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mei-Chin Chen
- Department
of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Ming-Hung Ling
- Department
of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Kuan-Ying Lai
- Department
of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Esar Pramudityo
- Department
of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
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237
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Kim YC, Park JH, Prausnitz MR. Microneedles for drug and vaccine delivery. Adv Drug Deliv Rev 2012; 64:1547-68. [PMID: 22575858 DOI: 10.1016/j.addr.2012.04.005] [Citation(s) in RCA: 1012] [Impact Index Per Article: 84.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 03/15/2012] [Accepted: 04/23/2012] [Indexed: 12/18/2022]
Abstract
Microneedles were first conceptualized for drug delivery many decades ago, but only became the subject of significant research starting in the mid-1990's when microfabrication technology enabled their manufacture as (i) solid microneedles for skin pretreatment to increase skin permeability, (ii) microneedles coated with drug that dissolves off in the skin, (iii) polymer microneedles that encapsulate drug and fully dissolve in the skin and (iv) hollow microneedles for drug infusion into the skin. As shown in more than 350 papers now published in the field, microneedles have been used to deliver a broad range of different low molecular weight drugs, biotherapeutics and vaccines, including published human studies with a number of small-molecule and protein drugs and vaccines. Influenza vaccination using a hollow microneedle is in widespread clinical use and a number of solid microneedle products are sold for cosmetic purposes. In addition to applications in the skin, microneedles have also been adapted for delivery of bioactives into the eye and into cells. Successful application of microneedles depends on device function that facilitates microneedle insertion and possible infusion into skin, skin recovery after microneedle removal, and drug stability during manufacturing, storage and delivery, and on patient outcomes, including lack of pain, skin irritation and skin infection, in addition to drug efficacy and safety. Building off a strong technology base and multiple demonstrations of successful drug delivery, microneedles are poised to advance further into clinical practice to enable better pharmaceutical therapies, vaccination and other applications.
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238
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Polymeric microdevices for transdermal and subcutaneous drug delivery. Adv Drug Deliv Rev 2012; 64:1603-16. [PMID: 23000744 DOI: 10.1016/j.addr.2012.09.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 08/13/2012] [Accepted: 09/05/2012] [Indexed: 02/04/2023]
Abstract
Low cost manufacturing of polymeric microdevices for transdermal and subcutaneous drug delivery is slated to have a major impact on next generation devices for administration of biopharmaceuticals and other emerging new formulations. These devices range in complexity from simple microneedle arrays to more complicated systems incorporating micropumps, micro-reservoirs, on-board sensors, and electronic intelligence. In this paper, we review devices currently in the market and those in the earlier stages of research and development. We also present two examples of the research in our laboratory towards using phase change liquids in polymeric structures to create disposable micropumps and the development of an elastomeric reservoir for MEMS-based transdermal drug delivery systems.
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239
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Lee K, Jung H. Drawing lithography for microneedles: A review of fundamentals and biomedical applications. Biomaterials 2012; 33:7309-26. [DOI: 10.1016/j.biomaterials.2012.06.065] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 06/25/2012] [Indexed: 11/16/2022]
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240
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Influence of skin model on in vitro performance of drug-loaded soluble microneedle arrays. Int J Pharm 2012; 434:80-9. [DOI: 10.1016/j.ijpharm.2012.05.069] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 05/25/2012] [Indexed: 11/23/2022]
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241
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Ke CJ, Lin YJ, Hu YC, Chiang WL, Chen KJ, Yang WC, Liu HL, Fu CC, Sung HW. Multidrug release based on microneedle arrays filled with pH-responsive PLGA hollow microspheres. Biomaterials 2012; 33:5156-65. [DOI: 10.1016/j.biomaterials.2012.03.056] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Accepted: 03/15/2012] [Indexed: 01/26/2023]
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242
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Kochhar JS, Zou S, Chan SY, Kang L. Protein encapsulation in polymeric microneedles by photolithography. Int J Nanomedicine 2012; 7:3143-54. [PMID: 22787403 PMCID: PMC3392142 DOI: 10.2147/ijn.s32000] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Recent interest in biocompatible polymeric microneedles for the delivery of biomolecules has propelled considerable interest in fabrication of microneedles. It is important that the fabrication process is feasible for drug encapsulation and compatible with the stability of the drug in question. Moreover, drug encapsulation may offer the advantage of higher drug loading compared with other technologies, such as drug coating. METHODS AND RESULTS In this study, we encapsulated a model protein drug, namely, bovine serum albumin, in polymeric microneedles by photolithography. Drug distribution within the microneedle array was found to be uniform. The encapsulated protein retained its primary, secondary, and tertiary structural characteristics. In vitro release of the encapsulated protein showed that almost all of the drug was released into phosphate buffered saline within 6 hours. The in vitro permeation profile of encapsulated bovine serum albumin through rat skin was also tested and shown to resemble the in vitro release profile, with an initial release burst followed by a slow release phase. The cytotoxicity of the microneedles without bovine serum albumin was tested in three different cell lines. High cell viabilities were observed, demonstrating the innocuous nature of the microneedles. CONCLUSION The microneedle array can potentially serve as a useful drug carrier for proteins, peptides, and vaccines.
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243
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Kochhar JS, Goh WJ, Chan SY, Kang L. A simple method of microneedle array fabrication for transdermal drug delivery. Drug Dev Ind Pharm 2012; 39:299-309. [DOI: 10.3109/03639045.2012.679361] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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244
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Garland MJ, Caffarel–Salvador E, Migalska K, Woolfson AD, Donnelly RF. Dissolving polymeric microneedle arrays for electrically assisted transdermal drug delivery. J Control Release 2012; 159:52-9. [PMID: 22265694 PMCID: PMC4119959 DOI: 10.1016/j.jconrel.2012.01.003] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 01/02/2012] [Accepted: 01/05/2012] [Indexed: 10/14/2022]
Abstract
It has recently been proposed that the combination of skin barrier impairment using microneedles (MNs) coupled with iontophoresis (ITP) may broaden the range of drugs suitable for transdermal delivery, as well as enabling the rate of delivery to be achieved with precise electronic control. However, no reports exist on the combination of ITP with in situ drug loaded polymeric MN delivery systems. Furthermore, although a number of studies have highlighted the importance of MN design for transdermal drug delivery enhancement, to date, there has been no systematic investigation of the influence of MN geometry on the performance of polymeric MN arrays which are designed to remain in contact with the skin during the period of drug delivery. As such, for the first time, this study reports on the effect of MN heigth and MN density upon the transdermal delivery of small hydrophilic compounds (theophylline, methylene blue, and fluorescein sodium) across neonatal porcine skin in vitro, with the optimised MN array design evaluated for its potential in the electrically faciliatated delivery of peptide (bovine insulin) and protein (fluorescein isothiocyanate-labelled bovine serum albumin (FTIC-BSA)) macromolecules. The results of the in vitro drug release investigations revealed that the extent of transdermal delivery was dependent upon the design of the MN array employed, whereby an increase in MN height and an increase in MN density led to an increase in the extent of transdermal drug delivery achieved 6h after MN application. Overall, the in vitro permeation studies revealed that the MN design containing 361 MNs/cm(2) of 600 μm height resulted in the greatest extent of transdermal drug delivery. As such, this design was evaluated for its potential in the MN mediated iontophoretic transdermal delivery. Whilst the combination of MN and ITP did not further enhance the extent of small molecular weight solute delivery, the extent of peptide/protein release was significantly enhanced when ITP was used in combination of the soluble PMVE/MA MN arrays. For example, the cumulative amount of insulin permeated across neonatal porcine skin at 6h was found to be approximately 150 μg (3.25%), 227 μg (4.85%) and 462 μg (9.87%) for ITP, MN, and MN/ITP delivery strategies, respectively. Similarly, the cumulative amount of FTIC-BSA delivered across neonatal porcine skin after a 6h period was found to be approximately 110 μg (4.53%) for MN alone and 326 μg (13.40%) for MN in combination with anodal ITP (p<0.001). As such, drug loaded soluble PMVE/MA MN arrays show promise for the electrically controlled transdermal delivery of biomacromolecules in a simple, one-step approach.
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Affiliation(s)
- Martin J. Garland
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Ester Caffarel–Salvador
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Katarzyna Migalska
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - A. David Woolfson
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Ryan F. Donnelly
- School of Pharmacy, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
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245
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Yang S, Feng Y, Zhang L, Chen N, Yuan W, Jin T. A scalable fabrication process of polymer microneedles. Int J Nanomedicine 2012; 7:1415-22. [PMID: 22457598 PMCID: PMC3310406 DOI: 10.2147/ijn.s28511] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
While polymer microneedles may easily be fabricated by casting a solution in a mold, either centrifugation or vacuumizing is needed to pull the viscous polymer solution into the microholes of the mold. We report a novel process to fabricate polymer microneedles with a one-sided vacuum using a ceramic mold that is breathable but water impermeable. A polymer solution containing polyvinyl alcohol and polysaccharide was cast in a ceramic mold and then pulled into the microholes by a vacuum applied to the opposite side of the mold. After cross-linking and solidification through freeze-thawing, the microneedle patch was detached from the mold and transferred with a specially designed instrument for the drying process, during which the patch shrank evenly to form an array of regular and uniform needles without deformation. Moreover, the shrinkage of the patches helped to reduce the needles’ size to ease microfabrication of the male mold. The dried microneedle patches were finally punched to the desired sizes to achieve various properties, including sufficient strength to penetrate skin, microneedles-absorbed water-swelling ratios, and drug-release kinetics. The results showed that the microneedles were strong enough to penetrate pigskin and that their performance was satisfactory in terms of swelling and drug release.
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Affiliation(s)
- Sixing Yang
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, People's Republic of China
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246
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Martin C, Allender C, Brain K, Morrissey A, Birchall J. Low temperature fabrication of biodegradable sugar glass microneedles for transdermal drug delivery applications. J Control Release 2012; 158:93-101. [DOI: 10.1016/j.jconrel.2011.10.024] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 10/19/2011] [Accepted: 10/21/2011] [Indexed: 11/25/2022]
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247
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Kim M, Jung B, Park JH. Hydrogel swelling as a trigger to release biodegradable polymer microneedles in skin. Biomaterials 2012; 33:668-78. [DOI: 10.1016/j.biomaterials.2011.09.074] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Accepted: 09/27/2011] [Indexed: 11/25/2022]
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248
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LI HAIRUI, KOCHHAR JASPREETSINGH, PAN JING, CHAN SUIYUNG, KANG LIFENG. NANO/MICROSCALE TECHNOLOGIES FOR DRUG DELIVERY. J MECH MED BIOL 2011. [DOI: 10.1142/s021951941100406x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nano- and microscale technologies have made a marked impact on the development of drug delivery systems. The loading efficiency and particle size of nano/micro particles can be better controlled with these new technologies than conventional methods. Moreover, drug delivery systems are moving from simple particles to smart particles and devices with programmable functions. These technologies are also contributing to in vitro and in vivo drug testing, which are important to evaluate drug delivery systems. For in vitro tests, lab-on-a-chip models are potentially useful as alternatives to animal models. For in vivo test, nano/micro-biosensors are developed for testing chemicals and biologics with high sensitivity and selectivity. Here, we review the recent development of nanoscale and microscale technologies in drug delivery including drug delivery systems, in vitro and in vivo tests.
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Affiliation(s)
- HAIRUI LI
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - JASPREET SINGH KOCHHAR
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - JING PAN
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - SUI YUNG CHAN
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - LIFENG KANG
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
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249
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Corware K, Harris D, Teo I, Rogers M, Naresh K, Müller I, Shaunak S. Accelerated healing of cutaneous leishmaniasis in non-healing BALB/c mice using water soluble amphotericin B-polymethacrylic acid. Biomaterials 2011; 32:8029-39. [PMID: 21807409 PMCID: PMC3168736 DOI: 10.1016/j.biomaterials.2011.07.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 07/07/2011] [Indexed: 01/19/2023]
Abstract
Cutaneous leishmaniasis (CL) is a neglected tropical disease that causes prominent skin scaring. No water soluble, non-toxic, short course and low cost treatment exists. We developed a new water soluble amphotericin B-polymethacrylic acid (AmB-PMA) using established and scalable chemistries. AmB-PMA was stable for 9 months during storage. In vitro, it was effective against Leishmania spp. promastigotes and amastigote infected macrophages. It was also less toxic and more effective than deoxycholate-AmB, and similar to liposomal AmB. Its in vivo activity was determined in both early and established CL lesion models of Leishmania major infection in genetically susceptible non-healing BALB/c mice. Intradermal AmB-PMA at a total dose of 18 mg of AmB/kg body weight led to rapid parasite killing and lesion healing. No toxicity was seen. No parasite relapse occurred after 80 days follow-up. Histological studies confirmed rapid parasite clearance from macrophages followed by accelerated fibroblast mediated tissue repair, regeneration and cure of the infection. Quantitative mRNA studies of the CL lesions showed that accelerated healing was associated with increased Tumour Necrosis Factor-α and Interferon-γ, and reduced Interleukin-10. These results suggest that a cost-effective AmB-PMA could be used to pharmacologically treat and immuno-therapeutically accelerate the healing of CL lesions.
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MESH Headings
- Amphotericin B/analogs & derivatives
- Amphotericin B/therapeutic use
- Amphotericin B/toxicity
- Animals
- Cell Line
- Chemokines/metabolism
- Disease Models, Animal
- Erythrocytes/drug effects
- Humans
- Hypersensitivity, Delayed/complications
- Hypersensitivity, Delayed/drug therapy
- Hypersensitivity, Delayed/parasitology
- Hypersensitivity, Delayed/pathology
- Immunomodulation/drug effects
- Leishmania major/drug effects
- Leishmaniasis, Cutaneous/complications
- Leishmaniasis, Cutaneous/drug therapy
- Leishmaniasis, Cutaneous/parasitology
- Leishmaniasis, Cutaneous/pathology
- Macrophages/drug effects
- Macrophages/parasitology
- Mice
- Mice, Inbred BALB C
- Parasite Load
- Polymethacrylic Acids/therapeutic use
- Polymethacrylic Acids/toxicity
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Solubility
- Spectrophotometry, Ultraviolet
- Toxicity Tests
- Water/chemistry
- Wound Healing/drug effects
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Affiliation(s)
- Karina Corware
- Department of Medicine, Infectious Diseases & Immunity, Hammersmith Hospital, Faculty of Medicine, Imperial College London, UK
| | - Debra Harris
- Department of Medicine, Infectious Diseases & Immunity, Hammersmith Hospital, Faculty of Medicine, Imperial College London, UK
| | - Ian Teo
- Department of Medicine, Infectious Diseases & Immunity, Hammersmith Hospital, Faculty of Medicine, Imperial College London, UK
| | - Matthew Rogers
- Department of Immunology, St. Mary's Hospital, Faculty of Medicine, Imperial College London, UK
| | - Kikkeri Naresh
- Department of Histopathology, Hammersmith Hospital, Faculty of Medicine, Imperial College London, UK
| | - Ingrid Müller
- Department of Immunology, St. Mary's Hospital, Faculty of Medicine, Imperial College London, UK
| | - Sunil Shaunak
- Department of Medicine, Infectious Diseases & Immunity, Hammersmith Hospital, Faculty of Medicine, Imperial College London, UK
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250
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Shah UU, Roberts M, Orlu Gul M, Tuleu C, Beresford MW. Needle-free and microneedle drug delivery in children: A case for disease-modifying antirheumatic drugs (DMARDs). Int J Pharm 2011; 416:1-11. [DOI: 10.1016/j.ijpharm.2011.07.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 06/30/2011] [Accepted: 07/02/2011] [Indexed: 12/22/2022]
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