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Chen Y, An Q, Teng K, Zhang Y, Zhao Y. Latest development and versatile applications of highly integrating drug delivery patch. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zhang C, Duan J, Huang Y, Chen M. Enhanced Skin Delivery of Therapeutic Peptides Using Spicule-Based Topical Delivery Systems. Pharmaceutics 2021; 13:pharmaceutics13122119. [PMID: 34959402 PMCID: PMC8709454 DOI: 10.3390/pharmaceutics13122119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/01/2021] [Accepted: 12/06/2021] [Indexed: 11/30/2022] Open
Abstract
This study reports two therapeutic peptides, insulin (INS, as a hydrophilic model peptide) and cyclosporine A (CysA, as a hydrophobic one), that can be administrated through a transdermal or dermal route by using spicule-based topical delivery systems in vitro and in vivo. We obtained a series of spicules with different shapes and sizes from five kinds of marine sponges and found a good correlation between the skin permeability enhancement induced by these spicules and their aspect ratio L/D. In the case of INS, Sponge Haliclona sp. spicules (SHS) dramatically increased the transdermal flux of INS (457.0 ± 32.3 ng/cm2/h) compared to its passive penetration (5.0 ± 2.2 ng/cm2/h) in vitro. Further, SHS treatment slowly and gradually reduced blood glucose to 13.1 ± 6.3% of the initial level in 8 h, while subcutaneous injection resulted in a rapid blood glucose reduction to 15.9 ± 1.4% of the initial level in 4 h, followed by a rise back to 75.1 ± 24.0% of the initial level in 8 h. In the case of CysA, SHS in combination with ethosomes (SpEt) significantly (p < 0.05) increased the accumulation of CysA in viable epidermis compared to other groups. Further, SpEt reduced the epidermis thickness by 41.5 ± 9.4% in 7 days, which was significantly more effective than all other groups. Spicule-based topical delivery systems offer promising strategies for delivering therapeutic peptides via a transdermal or dermal route.
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Affiliation(s)
- Chi Zhang
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China; (C.Z.); (J.D.)
| | - Jiwen Duan
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China; (C.Z.); (J.D.)
| | - Yongxiang Huang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China;
| | - Ming Chen
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China; (C.Z.); (J.D.)
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen University, Xiamen 361102, China
- Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
- Pingtan Research Institute of Xiamen University, Pingtan 350400, China
- Correspondence:
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Xenikakis I, Tsongas K, Tzimtzimis EK, Zacharis CK, Theodoroula N, Kalogianni EP, Demiri E, Vizirianakis IS, Tzetzis D, Fatouros DG. Fabrication of hollow microneedles using liquid crystal display (LCD) vat polymerization 3D printing technology for transdermal macromolecular delivery. Int J Pharm 2021; 597:120303. [PMID: 33540009 DOI: 10.1016/j.ijpharm.2021.120303] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/17/2021] [Accepted: 01/19/2021] [Indexed: 12/19/2022]
Abstract
The present study aimed to fabricate a hollow microneedle device consisting of an array and a reservoir by means of 3D printing technology for transdermal peptide delivery. Hollow microneedles (HMNs) were fabricated using a biocompatible resin material, while PLA filament was used for the reservoirs. The fabricated microdevice was characterized by means of optical microscopy, scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), contact angle measurements and leakage inspection studies to ensure the passageway of liquid formulations. Mechanical failure and penetration tests were carried out and supported by Finite Element Analysis (FEA). The cytocompatibility of the microneedle arrays was assessed to human keratinocytes (HaCaT). Finally, the transport of the model peptide octreotide acetate across artificial membranes was assessed in Franz cells using the aforementioned HMN design.
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Affiliation(s)
- Iakovos Xenikakis
- School of Health, Faculty of Pharmacy, Division of Pharmaceutical Technology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Konstantinos Tsongas
- Digital Manufacturing and Materials Characterization Laboratory, School of Science and Technology, International Hellenic University, School of Science and Technology, 14km Thessaloniki - N. Moudania, Thermi GR57001, Greece
| | - Emmanouil K Tzimtzimis
- Digital Manufacturing and Materials Characterization Laboratory, School of Science and Technology, International Hellenic University, School of Science and Technology, 14km Thessaloniki - N. Moudania, Thermi GR57001, Greece
| | - Constantinos K Zacharis
- Laboratory of Pharmaceutical Analysis, Department of Pharmaceutical Technology, School of Pharmacy, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Nikoleta Theodoroula
- School of Health, Faculty of Pharmacy, Laboratory of Pharmacology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Eleni P Kalogianni
- Department of Food Science and Technology, International Hellenic University, Sindos Campus, 57400 Thessaloniki, Greece
| | - Euterpi Demiri
- Department of Plastic Surgery, Medical School, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ioannis S Vizirianakis
- School of Health, Faculty of Pharmacy, Laboratory of Pharmacology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece; FunPATH (Functional Proteomics and Systems Biology Research Group at AUTH) Research Group, KEDEK - Aristotle University of Thessaloniki, Balkan Center, GR-57001 Thessaloniki, Greece
| | - Dimitrios Tzetzis
- Digital Manufacturing and Materials Characterization Laboratory, School of Science and Technology, International Hellenic University, School of Science and Technology, 14km Thessaloniki - N. Moudania, Thermi GR57001, Greece.
| | - Dimitrios G Fatouros
- School of Health, Faculty of Pharmacy, Division of Pharmaceutical Technology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
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Zhang Y, Yu J, Kahkoska AR, Wang J, Buse JB, Gu Z. Advances in transdermal insulin delivery. Adv Drug Deliv Rev 2019; 139:51-70. [PMID: 30528729 PMCID: PMC6556146 DOI: 10.1016/j.addr.2018.12.006] [Citation(s) in RCA: 171] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 11/06/2018] [Accepted: 12/05/2018] [Indexed: 12/13/2022]
Abstract
Insulin therapy is necessary to regulate blood glucose levels for people with type 1 diabetes and commonly used in advanced type 2 diabetes. Although subcutaneous insulin administration via hypodermic injection or pump-mediated infusion is the standard route of insulin delivery, it may be associated with pain, needle phobia, and decreased adherence, as well as the risk of infection. Therefore, transdermal insulin delivery has been widely investigated as an attractive alternative to subcutaneous approaches for diabetes management in recent years. Transdermal systems designed to prevent insulin degradation and offer controlled, sustained release of insulin may be desirable for patients and lead to increased adherence and glycemic outcomes. A challenge for transdermal insulin delivery is the inefficient passive insulin absorption through the skin due to the large molecular weight of the protein drug. In this review, we focus on the different transdermal insulin delivery techniques and their respective advantages and limitations, including chemical enhancers-promoted, electrically enhanced, mechanical force-triggered, and microneedle-assisted methods.
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Affiliation(s)
- Yuqi Zhang
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA
| | - Jicheng Yu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA
| | - Anna R Kahkoska
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Jinqiang Wang
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA
| | - John B Buse
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Zhen Gu
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA; California NanoSystems Institute, Jonsson Comprehensive Cancer Center, Center for Minimally Invasive Therapeutics, University of California, Los Angeles, CA 90095, USA.
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Bashyal S, Lee S. Delivery of biopharmaceuticals using combination of liposome and iontophoresis: a review. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2015. [DOI: 10.1007/s40005-015-0219-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Controlled transdermal delivery of leuprorelin by pulsed iontophoresis and ion-exchange fiber. Eur J Pharm Biopharm 2014; 88:594-601. [DOI: 10.1016/j.ejpb.2014.08.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 07/24/2014] [Accepted: 08/20/2014] [Indexed: 02/06/2023]
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Dubey S, Perozzo R, Scapozza L, Kalia YN. Noninvasive Transdermal Iontophoretic Delivery of Biologically Active Human Basic Fibroblast Growth Factor. Mol Pharm 2011; 8:1322-31. [DOI: 10.1021/mp200125j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- S. Dubey
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - R. Perozzo
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - L. Scapozza
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Y. N. Kalia
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
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Dubey S, Kalia Y. Electrically-assisted delivery of an anionic protein across intact skin: Cathodal iontophoresis of biologically active ribonuclease T1. J Control Release 2011; 152:356-62. [DOI: 10.1016/j.jconrel.2011.03.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 02/24/2011] [Accepted: 03/06/2011] [Indexed: 10/18/2022]
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Gratieri T, Kalaria D, Kalia YN. Non-invasive iontophoretic delivery of peptides and proteins across the skin. Expert Opin Drug Deliv 2011; 8:645-63. [DOI: 10.1517/17425247.2011.566265] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Kalluri H, Banga AK. Transdermal delivery of proteins. AAPS PharmSciTech 2011; 12:431-41. [PMID: 21369712 DOI: 10.1208/s12249-011-9601-6] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Accepted: 02/07/2011] [Indexed: 12/21/2022] Open
Abstract
Transdermal delivery of peptides and proteins avoids the disadvantages associated with the invasive parenteral route of administration and other alternative routes such as the pulmonary and nasal routes. Since proteins have a large size and are hydrophilic in nature, they cannot permeate passively across the skin due to the stratum corneum which allows the transport of only small lipophilic drug molecules. Enhancement techniques such as chemical enhancers, iontophoresis, microneedles, electroporation, sonophoresis, thermal ablation, laser ablation, radiofrequency ablation and noninvasive jet injectors aid in the delivery of proteins by overcoming the skin barrier in different ways. In this review, these enhancement techniques that can enable the transdermal delivery of proteins are discussed, including a discussion of mechanisms, sterility requirements, and commercial development of products. Combination of enhancement techniques may result in a synergistic effect allowing increased protein delivery and these are also discussed.
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Cázares-Delgadillo J, Ganem-Rondero A, Quintanar-Guerrero D, López-Castellano AC, Merino V, Kalia YN. Using transdermal iontophoresis to increase granisetron delivery across skin in vitro and in vivo: Effect of experimental conditions and a comparison with other enhancement strategies. Eur J Pharm Sci 2010; 39:387-93. [DOI: 10.1016/j.ejps.2010.01.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 01/07/2010] [Accepted: 01/10/2010] [Indexed: 10/19/2022]
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Benson HA, Namjoshi S. Proteins and Peptides: Strategies for Delivery to and Across the Skin. J Pharm Sci 2008; 97:3591-610. [DOI: 10.1002/jps.21277] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Cázares-Delgadillo J, Naik A, Ganem-Rondero A, Quintanar-Guerrero D, Kalia YN. Transdermal Delivery of Cytochrome C—A 12.4 kDa Protein—Across Intact Skin by Constant–Current Iontophoresis. Pharm Res 2007; 24:1360-8. [PMID: 17457661 DOI: 10.1007/s11095-007-9294-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2006] [Accepted: 03/12/2007] [Indexed: 10/23/2022]
Abstract
PURPOSE To demonstrate the transdermal iontophoretic delivery of a small (12.4 kDa) protein across intact skin. MATERIALS AND METHODS The iontophoretic transport of Cytochrome c (Cyt c) across porcine ear skin in vitro was investigated and quantified by HPLC. The effect of protein concentration (0.35 and 0.7 mM), current density (0.15, 0.3 or 0.5 mA.cm(-2) applied for 8 h) and competing ions was evaluated. Co-iontophoresis of acetaminophen was employed to quantify the respective contributions of electromigration (EM) and electroosmosis (EO). RESULTS The data confirmed the transdermal iontophoretic delivery of intact Cyt c. Electromigration was the principal transport mechanism, accounting for approximately 90% of delivery; correlation between EM flux and electrophoretic mobility was consistent with earlier results using small molecules. Modest EO inhibition was observed at 0.5 mA.cm(-2). Cumulative permeation at 0.3 and 0.5 mA.cm(-2) was significantly greater than that at 0.15 mA.cm(-2); fluxes using 0.35 and 0.7 mM Cyt c in the absence of competing ions (J ( tot ) = 182.8 +/- 56.8 and 265.2 +/- 149.1 microg.cm(-2).h(-1), respectively) were statistically equivalent. Formulation in PBS (pH 8.2) confirmed the impact of competing charge carriers; inclusion of approximately 170 mM Na(+) resulted in a 3.9-fold decrease in total flux. CONCLUSIONS Significant amounts ( approximately 0.9 mg.cm(-2) over 8 h) of Cyt c were delivered non-invasively across intact skin by transdermal electrotransport.
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Affiliation(s)
- J Cázares-Delgadillo
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, 30 Quai Ernest Ansermet, 1211, Geneva, Switzerland
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Schuetz YB, Carrupt PA, Naik A, Guy RH, Kalia YN. Structure–permeation relationships for the non-invasive transdermal delivery of cationic peptides by iontophoresis. Eur J Pharm Sci 2006; 29:53-9. [PMID: 16837178 DOI: 10.1016/j.ejps.2006.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Revised: 05/18/2006] [Accepted: 05/22/2006] [Indexed: 10/24/2022]
Abstract
Transdermal iontophoresis enables the controlled, non-invasive administration of peptide therapeutics. The aims of this study were (i) to evaluate the effect of amino acid sequence and the spatial distribution of peptide physicochemical properties on electrotransport, and (ii) to develop a quantitative model to predict peptide transport rates. Experimental results showed that the distribution of molecular properties over the peptide surface significantly affected iontophoretic delivery: different arrangements of the same residues resulted in different transport behavior. Computational studies generated three-dimensional quantitative structure-permeation relationships (3D-QSPR) based on 3D descriptors. The model predicted that iontophoresis was favored by peptide hydrophilicity but hindered by voluminous, localized hydrophobicity. Molecular characteristics that favor electrotransport are the converse of those required for passive diffusion across biological membranes. The data represent the first analysis of peptide electrotransport in terms of the spatial distribution of molecular properties and provide insight into the ab initio prediction of transdermal iontophoretic peptide delivery.
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Affiliation(s)
- Yannic B Schuetz
- Laboratory of Medicinal Chemistry, School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
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Schuetz YB, Naik A, Guy RH, Kalia YN. Effect of amino acid sequence on transdermal iontophoretic peptide delivery. Eur J Pharm Sci 2005; 26:429-37. [PMID: 16143501 DOI: 10.1016/j.ejps.2005.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Revised: 07/28/2005] [Accepted: 07/29/2005] [Indexed: 10/25/2022]
Abstract
The objective of this study was to investigate the effect of amino acid sequence on the transdermal delivery of peptides by iontophoresis. Structurally related, cationic tripeptides based on the residues at positions (i) 6-8 in LHRH (Ac-X-Leu-Arg-NH(2)) and (ii) 3-5 in octreotide (Ac-X-dTrp-Lys-NH(2)) were studied. Iontophoretic transport experiments were conducted using porcine skin in vitro to investigate the dependence of flux on peptide concentration. Co-iontophoresis of acetaminophen enabled deconvolution of the contributions of electromigration (EM) and electroosmosis (EO) and the calculation of an electroosmotic inhibition factor (IF). A two-fold increase in donor peptide concentration increased iontophoretic flux for most peptides, and electroosmotic inhibition for dNal-containing tripeptides. The improvement in transport and the impact on the EM and EO components were peptide-specific. A reduction in the number of competing ions in the formulation significantly increased transport and, specifically, the EM contribution; it also increased IF of compounds with a propensity to interact with the membrane. No monotonic dependence of flux on either molecular weight or lipophilicity was observed. Iontophoretic peptide transport could not be rationalized in terms of either peptide molecular weight or computational 2D estimates of lipophilicity. Data suggest that a more complex three-dimensional approach is required to develop structure permeation relationships governing iontophoretic peptide delivery.
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Affiliation(s)
- Yannic B Schuetz
- School of Pharmaceutical Sciences, University of Geneva, 30, Quai Ernest Ansermet, CH-1211 Geneva, Switzerland
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Schuetz YB, Naik A, Guy RH, Vuaridel E, Kalia YN. Transdermal Iontophoretic Delivery of Vapreotide Acetate AcrossPorcine Skin in Vitro. Pharm Res 2005; 22:1305-12. [PMID: 16078140 DOI: 10.1007/s11095-005-5276-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Accepted: 04/05/2005] [Indexed: 11/25/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the feasibility of delivering vapreotide, a somatostatin analogue, by transdermal iontophoresis. METHODS In vitro experiments were conducted using dermatomed porcine ear skin and heat-separated epidermis. In addition to quantifying vapreotide transport into and across the skin, the effect of peptide delivery on skin permselectivity was also measured. The influence of (1) current density, (2) pre- and post-treatment of the skin, (3) competitive ions, and (4) inclusion of albumin in the receptor on vapreotide delivery were investigated. RESULTS Epidermis proved to be a better model than dermatomed skin for vapreotide transport studies. Despite the susceptibility of vapreotide to enzymatic degradation, a flux of 1.7 microg/cm2 per hour was achieved after 7 h of constant current iontophoresis (0.15 mA/cm2). Post-iontophoretic extraction revealed that, depending on the experimental conditions, 80-300 microg of peptide were bound to the skin. Vapreotide was found to interact with the skin and displayed a current-dependent inhibition of electroosmosis. However, neither the pre-treatment strategies to saturate the putative binding sites nor the post-treatment protocols to displace the bound peptide were effective. CONCLUSION Based on the observed transport rate of vapreotide across porcine epidermis and its clinical pharmacokinetics, therapeutic concentrations should be achievable using a 15-cm2 patch.
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Affiliation(s)
- Yannic B Schuetz
- School of Pharmaceutical Sciences, University of Geneva, Geneva, CH-1211, Switzerland
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Schuetz YB, Naik A, Guy RH, Kalia YN. Emerging strategies for the transdermal delivery of peptide and protein drugs. Expert Opin Drug Deliv 2005; 2:533-48. [PMID: 16296773 DOI: 10.1517/17425247.2.3.533] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Transdermal delivery has been at the forefront of research addressing the development of non-invasive methods for the systemic administration of peptide and protein therapeutics generated by the biotechnology revolution. Numerous approaches have been suggested for overcoming the skin's formidable barrier function; whereas certain strategies simply act on the drug formulation or transiently increase the skin permeability, others are designed to bypass or even remove the outermost skin layer. This article reviews the technologies currently under investigation, ranging from those in their early-stage of development, such as laser-assisted delivery to others, where feasibility has already been demonstrated, such as microneedle systems, and finally more mature techniques that have already led to commercialisation (e.g., velocity-based technologies). The principles, mechanisms involved, potential applications, limitations and safety considerations are discussed for each approach, and the most advanced devices in each field are described.
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Affiliation(s)
- Yannic B Schuetz
- Centre interuniversitaire de Recherche et d'Enseignement Site d'Archamps, F-74160 Archamps, France
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Nair VB, Panchagnula R. Influence of electrical parameters in the iontophoretic delivery of a small peptide: in vitro studies using arginine–vasopressin as a model peptide. ACTA ACUST UNITED AC 2004; 59:583-93. [PMID: 15231436 DOI: 10.1016/j.farmac.2004.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2003] [Accepted: 02/14/2004] [Indexed: 11/17/2022]
Abstract
The present investigation was carried out to understand the influence of electrical parameters on iontophoretic transport of a small peptide like arginine-vasopressin (AVP). In vitro studies using rat skin were conducted to assess the effect of different current densities (CDs), durations, duty cycles and alternating polarity on vasopressin permeation. HPLC was used for ensuring electrochemical stability of the peptide whereas FT-IR and TGA were used to understand the biophysical changes caused in skin due to passage of current. Application of CD > 0.75 mA/cm(2) was found to compromise skin barrier integrity as well as electrochemical stability. Periodic current did not show any significant difference in permeation compared to continuous current. Alternating polarity was useful in reducing pH shift however, was less efficient compared to continuous direct current. FT-IR and TGA studies showed that skin hydration increased as a function of CD and duration and all the results could be explained on the basis of increased skin hydration.
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Affiliation(s)
- Vinod B Nair
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, SAS Nagar 160062, Punjab, India
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Kalia YN, Naik A, Garrison J, Guy RH. Iontophoretic drug delivery. Adv Drug Deliv Rev 2004; 56:619-58. [PMID: 15019750 DOI: 10.1016/j.addr.2003.10.026] [Citation(s) in RCA: 498] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2003] [Accepted: 10/13/2003] [Indexed: 01/23/2023]
Abstract
The composition and architecture of the stratum corneum render it a formidable barrier to the topical and transdermal administration of therapeutic agents. The physicochemical constraints severely limit the number of molecules that can be considered as realistic candidates for transdermal delivery. Iontophoresis provides a mechanism to enhance the penetration of hydrophilic and charged molecules across the skin. The principal distinguishing feature is the control afforded by iontophoresis and the ability to individualize therapies. This may become significant as the impact of interindividual variations in protein expression and the effect on drug metabolism and drug efficacy is better understood. In this review we describe the underlying mechanisms that drive iontophoresis and we discuss the impact of key experimental parameters-namely, drug concentration, applied current and pH-on iontophoretic delivery efficiency. We present a comprehensive and critical review of the different therapeutic classes and molecules that have been investigated as potential candidates for iontophoretic delivery. The iontophoretic delivery of peptides and proteins is also discussed. In the final section, we describe the development of the first pre-filled, pre-programmed iontophoretic device, which is scheduled to be commercialized during the course of 2004.
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Hirvonen J, Guy RH. Iontophoretic delivery across the skin: electroosmosis and its modulation by drug substances. Pharm Res 1997; 14:1258-63. [PMID: 9327458 DOI: 10.1023/a:1012127512251] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE The long-term objective of this research is to understand how the efficiency of iontophoresis depends upon the structural and physicochemical properties of the administered drug. Specifically, the ability of certain drug species to alter the permselective properties of the skin was examined. METHODS Using conventional in vitro methodology, the inhibition of electroosmotic flow induced by the iontophoresis of five different beta-blockers (of varying lipophilicity) was examined. The concomitant electrotransport of the most lipophilic species (propranolol) and the convective movement of solvent in the anode-to-cathode direction were measured. In addition, the possibility that electroosmosis might be augmented by the delivery of anionic drugs was also considered. RESULTS Iontophoresis of lipophilic, cationic beta-blockers caused a concentration-dependent inhibition of conventional electroosmosis. The most hydrophilic analogs elicited no effect. As a result of this charge neutralization phenomenon, the optimal concentration for propranolol iontophoresis was significantly less than the maximum achievable in aqueous solution. Only a very modest improvement in convective solvent flow was induced by the cathodal iontophoresis of anionic compounds. CONCLUSIONS The permselectivity of the skin can be altered by drugs which are positively charged and which possess a significant, adjacent hydrophobic surface. The latter seems able to "anchor" the molecule in the skin and the counter charge to the membrane's negative character ensures a tight association. Both lipophilicity and a positive charge are essential-without either, the phenomenon is not observed. The conformational flexibility of the drugs studied to-date, however, prevents unambiguous conclusions about the three-dimensional nature of the putative "binding site".
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Affiliation(s)
- J Hirvonen
- Department of Biopharmaceutical Sciences, University of California, San Francisco 94143-0446, USA
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Abstract
Iontophoresis, the use of an electric current to drive charged molecules across the skin, has the potential to expand the feasible range of drugs for transdermal administration significantly. This method of delivery is being examined carefully with respect to higher-molecular-weight therapeutics (in particular, peptides and small proteins), which cannot be absorbed following oral administration and for which, at this time, an invasive injection remains the only option. In addition, the procedure of so-called 'reverse' iontophoresis would appear to represent a truly noninvasive approach for diagnostic monitoring of blood chemistry.
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Affiliation(s)
- V Merino
- Centre Interuniversitaire de Recherche et d'Enseignement, Pharmapeptides, Parc d'Affaires International, Archamps, France
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Rothen-Weinhold A, Gurny R. Controlled and/or prolonged parental delivery of peptides from the hypothalmic pituitary axis. Eur J Pharm Biopharm 1997. [DOI: 10.1016/s0939-6411(96)00030-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
Transdermal administration by iontophoresis (enhanced transport via the skin using the driving force of an applied electric field) has been successfully demonstrated but no formal relationship between peptide sequence/structure and efficiency of delivery has been established. There are notable examples, such as the lipophilic leutinizing hormone releasing hormone (LHRH) analogs, Nafarelin and Leuprolide, that exhibit down-regulation of their own transport across the skin under the influence of an iontophoretic current. The hypothesis that this phenomenon is due to neutralization of the skin's net negative charge by these cationic peptides was examined with LHRH oligopeptides. The impact of these compounds on the electroosmotic flow of solvent into the skin, which is induced by iontophoresis and which contributes significantly to the electrotransport of large, positively charged ions, was examined and quantified. Close juxtaposition of cationic and lipophilic residues profoundly inhibited electroosmosis and, presumably, peptide flux. The results indicate that the lipophilicity of the oligopeptides facilitates van der Waals interactions with hydrophobic patches along the transport route, thereby permitting the positively charged oligopeptide to interact with carboxylate side chains that give the skin its net negative charge at neutral pH. The lipophilic, cationic oligopeptide, therefore, becomes anchored in the transport path, neutralizing the original charge of the membrane, and completely altering the permselective properties of the skin.
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Affiliation(s)
- J Hirvonen
- Department of Biopharmaceutical Sciences, University of California-San Francisco, CA 94143-0446, USA
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Vutla NB, Betageri GV, Banga AK. Transdermal iontophoretic delivery of enkephalin formulated in liposomes. J Pharm Sci 1996; 85:5-8. [PMID: 8926583 DOI: 10.1021/js950349y] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Transdermal iontophoretic transport of a liposomal formulation of [Leu5]enkephalin, across human cadaver skin, was investigated. Franz (vertical) cells were supplied with 0.5 mA/cm2 current density via silver/silver chloride electrodes from a Scepter power supply. Enkephalin spiked with [3H]enkephalin was transported across skin from anode or cathode, depending on the charge on the molecule. Liposomes or their constituents were shown to penetrate into the skin. Enkephalin, when delivered iontophoretically at its isoelectric point, from liposomes carrying positive or negative charge on their surface, resulted in permeation of radioactivity which was same or less than that of the controls when analyzed by liquid scintillation counting. When analyzed by radiochromatography detector on HPLC, degradation of enkephalin during transport was observed, with several degradation peaks in the chromatogram. The degradation was less in liposome formulations, as compared to controls. This is the first report of the combined use of liposomes and iontophoresis for transdermal delivery.
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Affiliation(s)
- N B Vutla
- Department of Pharmacal Sciences, Auburn University, AL 36849-5503, USA
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