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Souto EB, Macedo AS, Dias-Ferreira J, Cano A, Zielińska A, Matos CM. Elastic and Ultradeformable Liposomes for Transdermal Delivery of Active Pharmaceutical Ingredients (APIs). Int J Mol Sci 2021; 22:9743. [PMID: 34575907 PMCID: PMC8472566 DOI: 10.3390/ijms22189743] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/02/2021] [Accepted: 09/06/2021] [Indexed: 01/29/2023] Open
Abstract
Administration of active pharmaceutical ingredients (APIs) through the skin, by means of topical drug delivery systems, is an advanced therapeutic approach. As the skin is the largest organ of the human body, primarily acting as a natural protective barrier against permeation of xenobiotics, specific strategies to overcome this barrier are needed. Liposomes are nanometric-sized delivery systems composed of phospholipids, which are key components of cell membranes, making liposomes well tolerated and devoid of toxicity. As their lipid compositions are similar to those of the skin, liposomes are used as topical, dermal, and transdermal delivery systems. However, permeation of the first generation of liposomes through the skin posed some limitations; thus, a second generation of liposomes has emerged, overcoming permeability problems. Various mechanisms of permeation/penetration of elastic/ultra-deformable liposomes into the skin have been proposed; however, debate continues on their extent/mechanisms of permeation/penetration. In vivo bioavailability of an API administered in the form of ultra-deformable liposomes is similar to the bioavailability achieved when the same API is administered in the form of a solution by subcutaneous or epi-cutaneous injection, which demonstrates their applicability in transdermal drug delivery.
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Affiliation(s)
- Eliana B. Souto
- CEB—Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (J.D.-F.); (A.Z.)
| | - Ana S. Macedo
- Faculty of Health Sciences, Universidade Fernando Pessoa, Praça 9 de Abril, 349, 4249-004 Porto, Portugal;
- LAQV, REQUIMTE, Department of Chemical Sciences—Applied Chemistry Lab, Faculty of Pharmacy, University of Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - João Dias-Ferreira
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (J.D.-F.); (A.Z.)
| | - Amanda Cano
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain;
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
| | - Aleksandra Zielińska
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (J.D.-F.); (A.Z.)
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszyńska 32, 60-479 Poznań, Poland
| | - Carla M. Matos
- Faculty of Health Sciences, Universidade Fernando Pessoa, Praça 9 de Abril, 349, 4249-004 Porto, Portugal;
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Lipid gene nanocarriers for the treatment of skin diseases: Current state-of-the-art. Eur J Pharm Biopharm 2019; 137:95-111. [DOI: 10.1016/j.ejpb.2019.02.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 01/21/2019] [Accepted: 02/15/2019] [Indexed: 12/19/2022]
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Teagle AR, Birchall JC, Hargest R. Gene Therapy for Pyoderma Gangrenosum: Optimal Transfection Conditions and Effect of Drugs on Gene Delivery in the HaCaT Cell Line Using Cationic Liposomes. Skin Pharmacol Physiol 2016; 29:119-29. [DOI: 10.1159/000444859] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 02/19/2016] [Indexed: 11/19/2022]
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Foldvari M, Chen DW, Nafissi N, Calderon D, Narsineni L, Rafiee A. Non-viral gene therapy: Gains and challenges of non-invasive administration methods. J Control Release 2015; 240:165-190. [PMID: 26686079 DOI: 10.1016/j.jconrel.2015.12.012] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 11/26/2015] [Accepted: 12/09/2015] [Indexed: 12/20/2022]
Abstract
Gene therapy is becoming an influential part of the rapidly increasing armamentarium of biopharmaceuticals for improving health and combating diseases. Currently, three gene therapy treatments are approved by regulatory agencies. While these treatments utilize viral vectors, non-viral alternative technologies are also being developed to improve the safety profile and manufacturability of gene carrier formulations. We present an overview of gene-based therapies focusing on non-viral gene delivery systems and the genetic therapeutic tools that will further revolutionize medical treatment with primary focus on the range and development of non-invasive delivery systems for dermal, transdermal, ocular and pulmonary administrations and perspectives on other administration methods such as intranasal, oral, buccal, vaginal, rectal and otic delivery.
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Affiliation(s)
- Marianna Foldvari
- School of Pharmacy, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Center for Bioengineering and Biotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada.
| | - Ding Wen Chen
- School of Pharmacy, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Center for Bioengineering and Biotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Nafiseh Nafissi
- School of Pharmacy, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Center for Bioengineering and Biotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Daniella Calderon
- School of Pharmacy, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Center for Bioengineering and Biotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Lokesh Narsineni
- School of Pharmacy, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Center for Bioengineering and Biotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Amirreza Rafiee
- School of Pharmacy, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada; Center for Bioengineering and Biotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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Enhancing DNA delivery into the skin with a motorized microneedle device. Eur J Pharm Sci 2014; 52:215-22. [DOI: 10.1016/j.ejps.2013.11.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 11/18/2022]
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Luo Z, Ye T, Ma Y, Gill HS, Nitin N. Microprecision delivery of oligonucleotides in a 3D tissue model and its characterization using optical imaging. Mol Pharm 2013; 10:2868-79. [PMID: 23795670 DOI: 10.1021/mp300717f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite significant potential of oligonucleotides (ONs) for therapeutic and diagnostic applications, rapid and widespread intracellular delivery of ONs in cells situated in tissues such as skin, head and neck cavity, and eye has not been achieved. This study was aimed at evaluating the synergistic combination of microneedle (MN) arrays and biochemical approaches for localized intratissue delivery of oligonucleotides in living cells in 3D tissue models. This synergistic combination was based on the ability of MNs to precisely deliver ONs into tissues to achieve widespread distribution, and the ability of biochemical agents (streptolysin O (SLO) and cholesterol conjugation to ONs) to enhance intracellular ON delivery. The results of this study demonstrate that ON probes were uniformly coated on microneedle arrays and were efficiently released from the microneedle surface upon insertion in tissue phantoms. Co-insertion of microneedles coated with ONs and SLO into 3D tissue models resulted in delivery of ONs into both the cytoplasm and nucleus of cells. Within a short incubation time (35 min), ONs were observed both laterally and along the depth of a 3D tissue up to a distance of 500 μm from the microneedle insertion point. Similar widespread intratissue distribution of ONs was achieved upon delivery of ON-cholesterol conjugates. Uniformity of ON delivery in tissues improved with longer incubation times (24 h) postinsertion. Using cholesterol-conjugated ONs, delivery of ON probes was limited to the cytoplasm of cells within a tissue. Finally, delivery of cholesterol-conjugated anti-GFP ON resulted in reduction of GFP expression in HeLa cells. In summary, the results of this study provide a novel approach for efficient intracellular delivery of ONs in tissues.
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Affiliation(s)
- Zhen Luo
- Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California 95616, United States
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Chong RHE, Gonzalez-Gonzalez E, Lara MF, Speaker TJ, Contag CH, Kaspar RL, Coulman SA, Hargest R, Birchall JC. Gene silencing following siRNA delivery to skin via coated steel microneedles: In vitro and in vivo proof-of-concept. J Control Release 2013; 166:211-9. [PMID: 23313112 DOI: 10.1016/j.jconrel.2012.12.030] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 12/24/2012] [Accepted: 12/30/2012] [Indexed: 11/28/2022]
Abstract
The development of siRNA-based gene silencing therapies has significant potential for effectively treating debilitating genetic, hyper-proliferative or malignant skin conditions caused by aberrant gene expression. To be efficacious and widely accepted by physicians and patients, therapeutic siRNAs must access the viable skin layers in a stable and functional form, preferably without painful administration. In this study we explore the use of minimally-invasive steel microneedle devices to effectively deliver siRNA into skin. A simple, yet precise microneedle coating method permitted reproducible loading of siRNA onto individual microneedles. Following recovery from the microneedle surface, lamin A/C siRNA retained full activity, as demonstrated by significant reduction in lamin A/C mRNA levels and reduced lamin A/C protein in HaCaT keratinocyte cells. However, lamin A/C siRNA pre-complexed with a commercial lipid-based transfection reagent (siRNA lipoplex) was less functional following microneedle coating. As Accell-modified "self-delivery" siRNA targeted against CD44 also retained functionality after microneedle coating, this form of siRNA was used in subsequent in vivo studies, where gene silencing was determined in a transgenic reporter mouse skin model. Self-delivery siRNA targeting the reporter (luciferase/GFP) gene was coated onto microneedles and delivered to mouse footpad. Quantification of reporter mRNA and intravital imaging of reporter expression in the outer skin layers confirmed functional in vivo gene silencing following microneedle delivery of siRNA. The use of coated metal microneedles represents a new, simple, minimally-invasive, patient-friendly and potentially self-administrable method for the delivery of therapeutic nucleic acids to the skin.
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Affiliation(s)
- Rosalind H E Chong
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff CF10 3NB, UK
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Geusens B, Strobbe T, Bracke S, Dynoodt P, Sanders N, Gele MV, Lambert J. Lipid-mediated gene delivery to the skin. Eur J Pharm Sci 2011; 43:199-211. [DOI: 10.1016/j.ejps.2011.04.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Revised: 11/16/2010] [Accepted: 04/09/2011] [Indexed: 11/29/2022]
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Li J, Li X, Zhang Y, Zhou XK, Yang HS, Chen XC, Wang YS, Wei YQ, Chen LJ, Hu HZ, Liu CY. Gene therapy for psoriasis in the K14-VEGF transgenic mouse model by topical transdermal delivery of interleukin-4 using ultradeformable cationic liposome. J Gene Med 2010; 12:481-90. [PMID: 20527041 DOI: 10.1002/jgm.1459] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Topical transdermal gene delivery to the skin shows great potential for painless, non-invasive administration of vaccines and therapeutic agents. Interleukin (IL)-4 strategies have shown a good antipsoriatic effect in clinic trials. To date, no information has been acquired on the effectiveness of gene therapy for psoriasis in the K14-VEGF transgenic mouse model by topical transdermal penetration of murine IL-4 (mIL-4) using ultradeformable cationic liposome (UCL). METHODS In the present study, we synthesized an UCL and determined a suitable formula for transdermally delivering plasmid DNA to mouse skin. We then tested the antipsoriatic efficacy in the K14-VEGF transgenic mouse model by transdermal delivery of mIL-4 using UCL. RESULTS We found that plasmid DNA was transdermally delivered to vicinal sites of epidermis and hair follicles using this optimized formula. Plasmid DNA expression was detected in ear skin. Twenty-four hours after topical application, plasmid DNA was not detected in blood serum and liver, which may decrease the risk of insertion of promoter from plasmid to genomic DNA. Mice treated with UCL/mIL-4 displayed a mild psoriasis phenotype. Histological analysis of pathological score using the Baker scoring system revealed an antipsoriatic effect. Immunohistochemical analysis revealed that hyperplastic and inflamed vessels were suppressed. CONCLUSIONS These observations provide evidence of antipsoriatic efficacy by topical transdermal delivery of mIL-4. Therefore, topical transdermal gene transfer is attractive and offers future potential for application in human patients with other dermatogic diseases.
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Affiliation(s)
- Jiong Li
- State Key Laboratory of Biotherapy, West China Hospital, and School of life Science, Sichuan University, Chengdu, China.
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Ultradeformable cationic liposomes for delivery of small interfering RNA (siRNA) into human primary melanocytes. J Control Release 2008; 133:214-20. [PMID: 18973779 DOI: 10.1016/j.jconrel.2008.10.003] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Revised: 09/26/2008] [Accepted: 10/02/2008] [Indexed: 11/24/2022]
Abstract
The aim of this work was to develop a system that can deliver siRNA into cells present in the human epidermis. More specifically, we wanted to block the expression of a specific Myosin Va exon F containing isoform that is physiologically involved in melanosome transport in human melanocytes. Therefore, we prepared and investigated the capacity of ultradeformable cationic liposomes (UCLs) to deliver siRNA in hard-to-transfect human primary melanocytes. UCLs were formulated from different w:w ratios (6:1, 8:1 and 10:1) of the cationic lipid 1,2-dioleoyl-3-trimethylammonium propane (DOTAP) and the edge activator sodium cholate. Subsequently, UCL/siRNA complexes were prepared and their particle size, surface charge, deformability, cytotoxicity, transfection efficiency and long-term stability were tested. The best results were obtained with UCLs composed of a DOTAP/NaChol ratio of 6:1 (w:w) which are promising for future in vivo experiments.
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Palizban AA, Salehi R, Nori N, Galehdari H. In vivotransfection rat small intestine K-cell with pGIP/Ins plasmid by DOTAP liposome. J Drug Target 2008; 15:351-7. [PMID: 17541844 DOI: 10.1080/10611860701349364] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Gene therapies to produce insulin in diabetic patients have been considered for several years. Genetic engineering of ectopic insulin production and secretion in autologous non-beta-cells has been tested in different tissues. Recently, gut K-cells have been shown to express glucokinase, the glucose sensor of pancreatic beta-cells. K-cells are responsible for the secretion of the glucose-dependent insulinotropic peptide (GIP). Transfection of K-cells by a specific plasmid to produce insulin correlated to glucose level is being considered. Cationic liposomes are non-viral gene delivery to lung, spleen, liver and intestinal cells. DOTAP-GIP/Ins plasmid complex was used for transfection of K-cells in vivo. RT-PCR assay of human insulin mRNA revealed that the transfection of insulin gene by DOTAP liposome is an efficient tool. The genetic engineering of ectopic insulin production and secretion in autologous non-beta-cells is an appropriate method. The potential of the transmission of a constructed plasmid, which contains human insulin gene under the control of GIP promoter, to gut K-cells could be considered for treatment of diabetes.
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Affiliation(s)
- A A Palizban
- Department of Clinical Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences and Health Services, Isfahan. Iran.
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Morris AP, Brain KR, Heard CM. Skin permeation and ex vivo skin metabolism of O-acyl haloperidol ester prodrugs. Int J Pharm 2008; 367:44-50. [PMID: 18845232 DOI: 10.1016/j.ijpharm.2008.09.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 09/05/2008] [Accepted: 09/09/2008] [Indexed: 10/21/2022]
Abstract
Ethyl (HE), propyl (HP), butyl (HB), octyl (HO) and decyl (HD) O-acyl esters of haloperidol (HA) were evaluated for permeation across full-thickness human and guinea pig skin. The inclusion of 0.5mgmL(-1) cetrimide as a receptor phase solubilising agent did not significantly alter the barrier properties of the membranes. The permeation of the parent drug, HA, across guinea pig skin was found to be greater than that of its derivatives. Prodrug hydrolysis by cutaneous esterases was minimal. The permeation of HE, HP and HB across freshly excised guinea pig skin was subsequently investigated, however, prodrug hydrolysis remained low. Hydrolysis studies using a skin extract revealed only limited prodrug metabolism. However, in the presence of a liver extract, hydrolysis of all prodrugs was rapid. It was proposed that GGGX esterases, required for the hydrolysis of tertiary esters, were not present at a sufficiently high concentration within the skin for substantial prodrug hydrolysis to occur. This does not necessarily detract from the system as post-transdermal delivery liberation of HA in vivo is an equally useful mode for delivering this drug to the systemic circulation.
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Affiliation(s)
- Andrew P Morris
- Welsh School of Pharmacy, Cardiff University, Cardiff CF10 3NB, UK
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Transgenic expression of cytotoxic T-lymphocyte-associated antigen 4-immunoglobulin prolongs xenogeneic skin graft survival without extensive immunosuppression in rat burn wounds. ACTA ACUST UNITED AC 2008; 65:154-62. [PMID: 18580521 DOI: 10.1097/ta.0b013e31812f6f74] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND We sought to establish a transgenic animal line skin-specifically overexpressing cytotoxic T-lymphocyte-associated antigen 4-immunoglobulin (CTLA4Ig) as a reproducible source of xenogeneic skin grafts with extended survival for wound coverage. We tested this strategy in mice based on a previously established transgenic mouse line that stably and skin-specifically expresses CTLA4Ig for lifetimes and generations. METHODS CTLA4Ig expression was examined by immunohistochemical assay, and its bio-activity was tested by mixed lymphocyte reaction. The survival of transgenic mouse skin grafted onto rat burn wounds was observed. The impact of transgenic skin grafting on recipient immunity was evaluated by inspecting the survival of the wild-type skin grafted along with transgenic skin onto a separate wound on the same rat. The circulatory CTLA4Ig protein in recipient was detected by sandwich enzyme-linked immunosorbent assay, and its impact on recipient lymphocyte response against donor antigen was tested by mixed lymphocyte reaction. RESULTS The transgenic CTLA4Ig protein suppressed lymphocyte proliferation in vitro, and the transgenic skin graft survival was remarkably prolonged compared with the wild-type skin derived from the same mouse strain. The survival of the wild-type skin grafted along with transgenic skin exhibited no significant difference from that grafted alone. Circulatory CTLA4Ig protein was detected in recipients, however, no significantly reduced recipient lymphocyte response against donor antigen was observed. CONCLUSION transgenic expression of CTLA4Ig may be a potential and safe method to prolong xenogenic skin graft survival in burn wounds, and transgenic animal lines can be established as a reproducible source of skin grafts with extended survival for wound coverage.
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Wang X, Xu W, Mohapatra S, Kong X, Li X, Lockey RF, Mohapatra SS. Prevention of airway inflammation with topical cream containing imiquimod and small interfering RNA for natriuretic peptide receptor. GENETIC VACCINES AND THERAPY 2008; 6:7. [PMID: 18279512 PMCID: PMC2291050 DOI: 10.1186/1479-0556-6-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2007] [Accepted: 02/15/2008] [Indexed: 11/10/2022]
Abstract
Background Asthma is a complex disease, characterized by reversible airway obstruction, hyperresponsiveness and chronic inflammation. Principle pharmacologic treatments for asthma include bronchodilating beta2-agonists and anti-inflammatory glucocorticosteroids; but these agents do not target the main cause of the disease, the generation of pathogenic Th2 cells. We previously reported reduction in allergic inflammation in mice deficient in the ANP receptor NPRA. Here we determined whether siRNA for natriuretic peptide receptor A (siNPRA) protected against asthma when administered transdermally. Methods Imiquimod cream mixed with chitosan nanoparticles containing either siRNA green indicator (siGLO) or siNPRA was applied to the skin of mice. Delivery of siGLO was confirmed by fluorescence microscopy. The anti-inflammatory activity of transdermal siNPRA was tested in OVA-sensitized mice by measuring airway hyperresponsiveness, eosinophilia, lung histopathology and pro-inflammatory cytokines. Results SiGLO appearing in the lung proved the feasibility of transdermal delivery. In a mouse asthma model, BALB/c mice treated with imiquimod cream containing siNPRA chitosan nanoparticles showed significantly reduced airway hyperresponsiveness, eosinophilia, lung histopathology and pro-inflammatory cytokines IL-4 and IL-5 in lung homogenates compared to controls. Conclusion These results demonstrate that topical cream containing imiquimod and siNPRA nanoparticles exerts an anti-inflammatory effect and may provide a new and simple therapy for asthma.
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Affiliation(s)
- Xiaoqin Wang
- Clinical Laboratory Center of First Affiliated Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, China.
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Cohen-Sacks H, Elazar V, Gao J, Golomb A, Adwan H, Korchov N, Levy RJ, Berger MR, Golomb G. Delivery and expression of pDNA embedded in collagen matrices. J Control Release 2004; 95:309-20. [PMID: 14980779 DOI: 10.1016/j.jconrel.2003.11.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2003] [Accepted: 11/04/2003] [Indexed: 11/17/2022]
Abstract
Collagen matrices can be used as non-viral biocompatible gene carriers for localized implantable gene therapy. Collagen matrices embedding pDNA with enhanced binding through condensing agent linkage to the matrix or to the pDNA have been formulated, and characterized in various systems. pDNA and condensed pDNA were released intact from the matrices within 1-2 days. In vitro transfection with collagen matrices containing pDNA (luciferase encoding), pDNA in liposome (LIP), and pDNA with polyethylenimine (PEI) resulted in significantly higher expression levels in comparison to naked pDNA. pDNA-LIP matrices exhibited a dose response transfection of NIH 3T3, 293, MDA-MB-231 and smooth muscle cells (SMCs) in cell cultures. Subdermal implantations of collagen-polylysine-pDNA matrices in rats resulted in significantly higher gene expression levels in comparison to non-condensed pDNA matrices. Perivascular treatment with pDNA matrix and of naked pDNA solution in balloon-injured rat carotid arteries resulted in significant expression. In conclusion, a facile method for embedding cationic formulations of pDNA in collagen matrices was developed. These bioactive matrices seem to be suitable for tissue engineering and local gene therapy strategies.
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Affiliation(s)
- Hagit Cohen-Sacks
- Department of Pharmaceutics, Faculty of Medicine, School of Pharmacy, The Hebrew University of Jerusalem, Post Office Box 12065, 91120 Jerusalem, Israel
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Affiliation(s)
- J Hadgraft
- Medway Sciences, Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
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