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Abu-Azzam O, Nasr M. In vitro anti-inflammatory potential of phloretin microemulsion as a new formulation for prospective treatment of vaginitis. Pharm Dev Technol 2020; 25:930-935. [PMID: 32363977 DOI: 10.1080/10837450.2020.1764032] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Phloretin is a promising polyphenolic compound known for its anti-inflammatory properties, but its poor solubility and low bioavailability hinder its clinical applicability. Till current date, its potential in the treatment of vaginitis has not been explored, and only very few papers reported its formulation as nanoparticles to overcome its pharmaceutical challenges. Therefore, in the current study, phloretin was formulated in microemulsion of 11 nm size, and its in vitro anti-inflammatory properties were explored using histamine and IL-6 release inhibition assays, protease inhibition assay, and membrane stabilization potential. The anti-inflammatory properties of phloretin microemulsion were compared to the drug phloretin, and the reference standard non-steroidal anti-inflammatory drugs (NSAIDs). Results proved that both phloretin and phloretin microemulsion significantly inhibited the release of the inflammatory mediators histamine and IL-6, inhibited protease action, and exhibited membrane stabilization potential. Phloretin microemulsion exhibited comparable anti-inflammatory properties to the NSAIDs diclofenac and indomethacin, and, hence, it can be delineated as a promising therapeutic tool in topical treatment of vaginal inflammation.
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Affiliation(s)
- Omar Abu-Azzam
- Department of Obstetrics and Gynecology, Faculty of Medicine, Mu'tah University, Mu'tah, Jordan
| | - Maha Nasr
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
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52
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Grande F, Ragno G, Muzzalupo R, Occhiuzzi MA, Mazzotta E, De Luca M, Garofalo A, Ioele G. Gel Formulation of Nabumetone and a Newly Synthesized Analog: Microemulsion as a Photoprotective Topical Delivery System. Pharmaceutics 2020; 12:pharmaceutics12050423. [PMID: 32380748 PMCID: PMC7284650 DOI: 10.3390/pharmaceutics12050423] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/30/2020] [Accepted: 05/03/2020] [Indexed: 11/16/2022] Open
Abstract
Photostability studies were performed on topical formulations containing the anti-inflammatory drug Nabumetone and an analog newly synthesized in order to achieve better photostability and pharmacokinetic profile. Stability tests, according to the International Conference on Harmonization rules, were applied on ethanol solutions and topical gel formulations of both compounds. The photodegradation profiles were monitored by Multivariate curve resolution applied to the UV spectral data. The inclusion of the compounds in microemulsion was investigated to improve light stability and, at the same time, to ensure a sustained release system for skin delivery. All the formulations in solution, gel, microemulsion, and microemulsion-in-gel were exposed to a forced irradiation of 350 W/m2, corresponding to a 21 kJ/m2 min, for up to 300 min. Photostability increased significantly for both drugs in the liquid microemulsion and microemulsion-in-gel, compared to the ethanol solution and plain gel, reaching a residual drug of 97% and 98% for Nabumetone and analog in microemulsion-in-gel, respectively. Permeation experiments on the microemulsion-in-gel showed a better performance of the analog formulated at 0.2%, compared to the same formulation of Nabumetone at 0.7%. These results highlight the potential of the designed matrices as delayed drug delivery systems along with the use of lower drug doses leading to reduced side effects.
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Affiliation(s)
| | | | - Rita Muzzalupo
- Correspondence: (R.M.); (G.I.); Tel.: +39-0984-493268 (G.I.)
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53
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Andreani T, Dias-Ferreira J, Fangueiro JF, Souza ALR, Kiill CP, Gremião MPD, García ML, Silva AM, Souto EB. Formulating octyl methoxycinnamate in hybrid lipid-silica nanoparticles: An innovative approach for UV skin protection. Heliyon 2020; 6:e03831. [PMID: 32395645 PMCID: PMC7205751 DOI: 10.1016/j.heliyon.2020.e03831] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 01/24/2020] [Accepted: 04/20/2020] [Indexed: 12/27/2022] Open
Abstract
Sunscreens have been employed on daily skin care for centuries. Their role in protecting the skin from sun damage, avoiding accelerated photoaging and even limiting the risk of development of skin cancer is unquestionable. Although several chemical and physical filters are approved as sunscreens for human use, their safety profile is dependent on their concentration in the formulation which governs their acceptance by the regulatory agencies. A strategic delivery of such molecules should provide a UV protection and limit the skin penetration. Solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) may offer an alternative approach to achieve a synergistic effect on the UV protection when loaded with sunscreens as particles themselves also have a UV light scattering effect. Besides, the lipid character of SLN and NLC improves the encapsulation of lipophilic compounds, with enhanced loading capacity. Silica nanoparticles have also been employed in sunscreen formulations. Due to the formed sol-gel complexes, which covalently entrap sunscreen molecules, a controlled release is also achieved. In the present work, we have developed a new sunscreen formulation composed of hybrid SLN-Silica particles loaded with octyl methoxycinnamate (Parsol®MCX), and their further incorporation into a hydrogel for skin administration. Hybrid SLN-silica particles of 210.0 ± 3.341 nm of mean size, polydispersity below 0.3, zeta potential of ca. |7| mV, loading capacity of 19.9% and encapsulation efficiency of 98.3% have been produced. Despite the slight negative surface charge, the developed hybrid nanoparticles remained physicochemically stable over the study period. Turbiscan transmission profiles confirmed the colloidal stability of the formulations under stress conditions. The texture profile analysis of Parsol-SLN and Parsol-SLN-Si revealed semi-solid properties (e.g. adhesiveness, hardness, cohesiveness, springiness, gumminess, chewiness, resilience) suitable for topical application, together with the bioadhesiveness in the skin of pig ears. The non-irritation profile of the hybrid nanoparticles before and after dispersion into Carbopol hydrogels was confirmed by HET-CAM test.
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Affiliation(s)
- T Andreani
- Department of Biology and Environment, University of Tras-os-Montes e Alto Douro, UTAD, Quinta de Prados, P-5001-801 Vila Real, Portugal.,Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB-UTAD), Quinta de Prados, 5001-801 Vila Real, Portugal
| | - J Dias-Ferreira
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - J F Fangueiro
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - A L R Souza
- School of Pharmaceutical Sciences, UNESP - Universidade Estadual Paulista, Rodovia Araraquara-Jau Km 1, Araraquara, SP 14801-902, Brazil
| | - C P Kiill
- School of Pharmaceutical Sciences, UNESP - Universidade Estadual Paulista, Rodovia Araraquara-Jau Km 1, Araraquara, SP 14801-902, Brazil
| | - M P D Gremião
- School of Pharmaceutical Sciences, UNESP - Universidade Estadual Paulista, Rodovia Araraquara-Jau Km 1, Araraquara, SP 14801-902, Brazil
| | - M L García
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain
| | - A M Silva
- Department of Biology and Environment, University of Tras-os-Montes e Alto Douro, UTAD, Quinta de Prados, P-5001-801 Vila Real, Portugal.,Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB-UTAD), Quinta de Prados, 5001-801 Vila Real, Portugal
| | - E B Souto
- Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.,CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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54
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Villanueva-Martínez A, Hernández-Rizo L, Ganem-Rondero A. Evaluating two nanocarrier systems for the transdermal delivery of sodium alendronate. Int J Pharm 2020; 582:119312. [DOI: 10.1016/j.ijpharm.2020.119312] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 03/29/2020] [Accepted: 04/05/2020] [Indexed: 01/17/2023]
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55
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Novel and Modified Neutrophil Elastase Inhibitor Loaded in Topical Formulations for Psoriasis Management. Pharmaceutics 2020; 12:pharmaceutics12040358. [PMID: 32295247 PMCID: PMC7238052 DOI: 10.3390/pharmaceutics12040358] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/17/2022] Open
Abstract
Human neutrophil elastase (HNE) is a serine protease that degrades matrix proteins. An excess of HNE may trigger several pathological conditions, such as psoriasis. In this work, we aimed to synthesize, characterize and formulate new HNE inhibitors with a 4-oxo-β-lactam scaffold with less toxicity, as well as therapeutic index in a psoriasis context. HNE inhibitors with 4-oxo-β-lactam scaffolds were synthesized and characterized by NMR, FTIR, melting point, mass spectrometry and elemental analysis. In vitro cytotoxicity and serine protease assays were performed. The compound with the highest cell viability (AAN-16) was selected to be incorporated in an emulsion (AAN-16 E) and in a microemulsion (AAN-16 ME). Formulations were characterized in terms of organoleptic properties, pH, rheology, droplet size distribution, in vitro drug release and in vivo psoriatic activity. All compounds were successfully synthesized according to analytical methodology, with good yields. Both formulations presented suitable physicochemical properties. AAN-16 E presented the most promising therapeutic effects in a murine model of psoriasis. Overall, new HNE inhibitors were synthesized with high and selective activity and incorporated into topical emulsions with potential to treat psoriasis.
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56
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Yang C, Guo S, Wu X, Yang P, Han L, Dai X, Shi X. Multiscale study on the enhancing effect and mechanism of borneolum on transdermal permeation of drugs with different log P values and molecular sizes. Int J Pharm 2020; 580:119225. [DOI: 10.1016/j.ijpharm.2020.119225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 03/03/2020] [Accepted: 03/11/2020] [Indexed: 12/24/2022]
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57
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Topical Delivery of Meloxicam using Liposome and Microemulsion Formulation Approaches. Pharmaceutics 2020; 12:pharmaceutics12030282. [PMID: 32245190 PMCID: PMC7151031 DOI: 10.3390/pharmaceutics12030282] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/11/2020] [Accepted: 03/19/2020] [Indexed: 01/29/2023] Open
Abstract
The aim of this study is to develop, characterize and compare conventional liposome, deformable liposome (transfersome) and microemulsion formulations as potential topical delivery systems for meloxicam. Liposomes were characterized in terms of vesicle size, zeta potential and entrapment efficiency. For microemulsions, particle size, electrical conductivity and viscosity studies were performed to assess the structure of the investigated systems. An ex vivo skin permeation study has been conducted to compare these formulations. The dermal and transdermal delivery of meloxicam using these formulations can be a promising alternative to conventional oral delivery of non-steroidal anti-inflammatory drugs (NSAIDs) with enhanced local and systemic onset of action and reduced side effects.
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58
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Yang S, Liu L, Han J, Tang Y. Encapsulating plant ingredients for dermocosmetic application: an updated review of delivery systems and characterization techniques. Int J Cosmet Sci 2020; 42:16-28. [PMID: 31724203 DOI: 10.1111/ics.12592] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 11/12/2019] [Indexed: 12/15/2022]
Abstract
Today, there is a rising demand and ongoing search for novel plant-derived phytochemicals in the cosmetic market owing to the growing consumer expectations worldwide for green and natural health products. Various plant ingredients, including polyphenols, oils, volatile oils, vitamins and other herbal extracts, have been extensively used in herbal cosmetics. Recent advances in encapsulation technologies have greatly improved their chemical stability, biocompatibility, skin permeability and dermocosmetic efficiency when applied topically. This comprehensive review summarizes the up-to-date information on encapsulated plant ingredients tailored for dermocosmetic application with a focus on the development of novel delivery systems. An overview of the commonly used techniques for carrier characterization, performance-related properties and toxicological evaluation is also included, which might provide guidance for researchers to select or develop appropriate assay systems.
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Affiliation(s)
- S Yang
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing, 100048, China.,Department of Cosmetics, School of Science, Beijing Technology and Business University, Beijing, 100048, China
| | - L Liu
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing, 100048, China.,Department of Cosmetics, School of Science, Beijing Technology and Business University, Beijing, 100048, China
| | - J Han
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing, 100048, China.,Department of Cosmetics, School of Science, Beijing Technology and Business University, Beijing, 100048, China
| | - Y Tang
- Beijing Key Laboratory of Plant Resources Research and Development, School of Science, Beijing Technology and Business University, Beijing, 100048, China.,Department of Cosmetics, School of Science, Beijing Technology and Business University, Beijing, 100048, China
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59
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Praça FG, Viegas JSR, Peh HY, Garbin TN, Medina WSG, Bentley MVLB. Microemulsion co-delivering vitamin A and vitamin E as a new platform for topical treatment of acute skin inflammation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110639. [PMID: 32204073 DOI: 10.1016/j.msec.2020.110639] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/06/2019] [Accepted: 01/03/2020] [Indexed: 11/19/2022]
Abstract
In this study, we developed a water-in-oil microemulsion containing vitamin A (retinol) and vitamin E (α-tocopherol), which serves as a multifunctional nanosystem that co-delivers antioxidants and displayed additive effect against acute skin inflammation. Microemulsion (ME) was prepared by mixing a surfactant blend (Tween 80 and propylene glycol, 5:1) with isopropyl myristate and water (ratio of 50:40:10, respectively). Vitamin A (0.05% w/w concentration) and/or vitamin E (0.1% w/w concentration) were incorporated into the surfactant mixture of ME by stirring with a magnetic stirrer for 30 min. This multifunctional ME displayed physical stability, with low cytotoxicity in 3T3 cell line, as well as cellular internalization into the cytosol. In vivo treatments using ME delivering α-tocopherol reduced dermal expression of TNF-α by 1.3-fold (p < 0.01), when compared to unloaded ME treatment group. When retinol was added into the ME containing α-tocopherol, it further reduced TNF-α expression by 2-fold (p < 0.001), suggesting the additive effect of vitamin E and vitamin A in the treatment against skin inflammation. In conclusion, we successfully developed the use of water-in-oil ME to pack both vitamin E and vitamin A, and demonstrated for the first time its anti-inflammatory potential when applied topically to TPA-induced inflamed skin.
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Affiliation(s)
- Fabíola Garcia Praça
- School of Pharmaceutical Sciences of Ribeirão Preto, Department of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Juliana Santos Rosa Viegas
- School of Pharmaceutical Sciences of Ribeirão Preto, Department of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Hong Yong Peh
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | | | | | - Maria Vitoria Lopes Badra Bentley
- School of Pharmaceutical Sciences of Ribeirão Preto, Department of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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60
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Sarheed O, Shouqair D, Ramesh KVRNS, Khaleel T, Amin M, Boateng J, Drechsler M. Formation of stable nanoemulsions by ultrasound-assisted two-step emulsification process for topical drug delivery: Effect of oil phase composition and surfactant concentration and loratadine as ripening inhibitor. Int J Pharm 2019; 576:118952. [PMID: 31843549 DOI: 10.1016/j.ijpharm.2019.118952] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/14/2019] [Accepted: 12/11/2019] [Indexed: 01/02/2023]
Abstract
Nanoemulsions are very interesting systems as they offer capacity to encapsulate both hydrophilic and lipophilic molecules in a single particle, as well as the controlled release of chemical moieties initially entrapped in the internal droplets. In this study, we propose a new two-step modified ultrasound-assisted phase inversion approaches-phase inversion temperature (PIT) and self-emulsification, to prepare stable o/w nanoemulsions from a fully water-dilutable microemulsion template for the transdermal delivery of loratadine (a hydrophobe and as Ostwald ripening inhibitor). Firstly, the primary water-in-oil microemulsion concentrate (w/o) was formed using loratadine in the oil phase (oleic acid or coconut oil) and Tween 80 in the aqueous phase and by adjusting the PIT around 85 °C followed by stepwise dilution with water at 25 °C to initiate the formation the nanoemulsions (o/w). To assure the long-term stability, a brief application of low frequency ultrasound was employed. Combining the two low energy methods resulted in nanoemulsions prepared by mixing constant surfactant/oil ratios above the PIT with varying water volume fraction (self-emulsification) during the PIT by stepwise dilution. The kinetic stability was evaluated by measuring the droplet size with time by dynamic light scattering (DLS). The droplet size ranged 15-43 nm and did not exceed 100 nm over the period of 6 months indicating the system had high kinetic stability. Cryo-TEM showed that the nanoemulsions droplets were monodispersed and approaching micellar structure and scale. All nanoemulsions had loratadine crystals formed within 20 days after preparation, which tended to sediment during storage. Nanoemulsions improved the in vitro permeation of loratadine through porcine skin up to 20 times compared to the saturated solution.
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Affiliation(s)
- Omar Sarheed
- RAK College of Pharmaceutical Sciences, RAK Medical and Health Sciences University, Ras AlKhaimah, United Arab Emirates.
| | - Douha Shouqair
- RAK College of Pharmaceutical Sciences, RAK Medical and Health Sciences University, Ras AlKhaimah, United Arab Emirates
| | - K V R N S Ramesh
- RAK College of Pharmaceutical Sciences, RAK Medical and Health Sciences University, Ras AlKhaimah, United Arab Emirates
| | - Taha Khaleel
- RAK College of Pharmaceutical Sciences, RAK Medical and Health Sciences University, Ras AlKhaimah, United Arab Emirates
| | - Muhammad Amin
- School of Science, Faculty of Engineering and Science, University of Greenwich, UK
| | - Joshua Boateng
- School of Science, Faculty of Engineering and Science, University of Greenwich, UK
| | - Markus Drechsler
- Bavarian Polymer Institute, KeyLab "Electron and Optical Microscopy", University of Bayreuth, Germany
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61
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Alkyl polyglucoside-based adapalene-loaded microemulsions for targeted dermal delivery: Structure, stability and comparative biopharmaceutical characterization with a conventional dosage form. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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62
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Benbow T, Campbell J. Microemulsions as transdermal drug delivery systems for nonsteroidal anti-inflammatory drugs (NSAIDs): a literature review. Drug Dev Ind Pharm 2019; 45:1849-1855. [DOI: 10.1080/03639045.2019.1680996] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tarique Benbow
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, Canada
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63
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Kurtz SL, Lawson LB. Nanoemulsions Enhance in vitro Transpapillary Diffusion of Model Fluorescent Dye Nile Red. Sci Rep 2019; 9:11810. [PMID: 31413320 PMCID: PMC6694173 DOI: 10.1038/s41598-019-48144-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/29/2019] [Indexed: 11/30/2022] Open
Abstract
While the feasibility of transpapillary drug delivery has previously been established, localized transport via the mammary ducts may be improved with tailored drug delivery formulations. The objective of this study was to investigate the impact of nanoemulsion encapsulation on transpapillary delivery in vitro. Nanoemulsion formulations composed of isopropyl myristate and Tween 80 encapsulating a fluorescent dye were applied topically on porcine nipples using a Franz diffusion cell. A combination of dye extraction and fluorescence image analysis was used to quantify the total amount of dye retained within the nipple and to characterize the penetration routes. After diffusion for 6 hours, the amount of dye deposited in the nipple was proportional to the formulation’s water concentration. The 90% water formulation deposited significantly more dye via both the stratum corneum and mammary ducts, while the 80% and 70% water formulations moderately increased ductal penetration, but minimally altered stratum corneum penetration as compared to the control solution. Similar trends were found after diffusion for 48 hours; however, the overall impact was diminished, likely due to the nanoemulsion’s topical instability. This study indicates that drug delivery vehicles, nanoemulsions specifically, enhance delivery of encapsulated molecules via the stratum corneum and mammary ducts in a formulation-dependent basis.
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Affiliation(s)
- Samantha L Kurtz
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, 70112, USA.,Bioinnovation Ph.D. Program, Tulane University School of Science and Engineering, New Orleans, LA, 70118, USA
| | - Louise B Lawson
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, 70112, USA.
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64
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Nanoemulsion: A Review on Mechanisms for the Transdermal Delivery of Hydrophobic and Hydrophilic Drugs. Sci Pharm 2019. [DOI: 10.3390/scipharm87030017] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Nanoemulsions (NEs) are colloidal dispersions of two immiscible liquids, oil and water, in which one is dispersed in the other with the aid of a surfactant/co-surfactant mixture, either forming oil-in-water (o/w) or water-in-oil (w/o) nanodroplets systems, with droplets 20–200 nm in size. NEs are easy to prepare and upscale, and they show high variability in their components. They have proven to be very viable, non-invasive, and cost-effective nanocarriers for the enhanced transdermal delivery of a wide range of active compounds that tend to metabolize heavily or suffer from undesirable side effects when taken orally. In addition, the anti-microbial and anti-viral properties of NE components, leading to preservative-free formulations, make NE a very attractive approach for transdermal drug delivery. This review focuses on how NEs mechanistically deliver both lipophilic and hydrophilic drugs through skin layers to reach the blood stream, exerting the desired therapeutic effect. It highlights the mechanisms and strategies executed to effectively deliver drugs, both with o/w and w/o NE types, through the transdermal way. However, the mechanisms reported in the literature are highly diverse, to the extent that a definite mechanism is not conclusive.
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65
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Ghorbanzadeh M, Farhadian N, Golmohammadzadeh S, Karimi M, Ebrahimi M. Formulation, clinical and histopathological assessment of microemulsion based hydrogel for UV protection of skin. Colloids Surf B Biointerfaces 2019; 179:393-404. [DOI: 10.1016/j.colsurfb.2019.04.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 03/22/2019] [Accepted: 04/07/2019] [Indexed: 12/21/2022]
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66
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Gharbavi M, Manjili HK, Amani J, Sharafi A, Danafar H. In vivo and in vitro biocompatibility study of novel microemulsion hybridized with bovine serum albumin as nanocarrier for drug delivery. Heliyon 2019; 5:e01858. [PMID: 31198875 PMCID: PMC6556858 DOI: 10.1016/j.heliyon.2019.e01858] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 11/24/2022] Open
Abstract
The present study aimed to synthesize triacetin-microemulsion (T-ME) and T-ME hybridized with bovine serum albumin nanoparticles (T-BSA-ME) having narrow particle size distribution and versatile carrier systems as a novel microemulsion system. The suggested ME system was characterized by Fourier Transform Infrared spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), and Atomic Force Microscopy (AFM). The physicochemical properties of microemulsion system including particle size, PDI and ζ-potential, refractive index, Conductivity, %Transmittance, pH, and rheological behavior were also evaluated. In vivo biocompatibility was done using Median Lethal Dose (LD 50) calculated and trialed to evaluate the acute toxicity. In Addition, hemolysis and leukocyte proliferation assay were characterized to evaluate in-vitro biocompatibility of the suggested MEs systems. Moreover, cytotoxicity of MEs systems was also investigated on HFF-2 and HEK-293 cells. The presence of BSA NPs as a macromolecular biomaterial hybridized with T-ME reduced the cytotoxicity. The properties of the suggested MEs system proposed the T-ME hybridized with BSA-NPs as a promising candidate for co-delivery and multifunctional biomedicine applications.
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Affiliation(s)
- Mahmoud Gharbavi
- Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Applied Pharmacology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Hamidreza Kheiri Manjili
- Pharmaceutical Nanotechnology Department, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Pharmaceutical Biotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Jafar Amani
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ali Sharafi
- Zanjan Pharmaceutical Biotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.,Cancer Gene Therapy Research Center, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Applied Pharmacology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Hossein Danafar
- Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
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67
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Chhibber S, Gondil VS, Singla L, Kumar M, Chhibber T, Sharma G, Sharma RK, Wangoo N, Katare OP. Effective Topical Delivery of H-AgNPs for Eradication of Klebsiella pneumoniae-Induced Burn Wound Infection. AAPS PharmSciTech 2019; 20:169. [PMID: 31004249 DOI: 10.1208/s12249-019-1350-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 02/22/2019] [Indexed: 11/30/2022] Open
Abstract
The aim of the present study was to explore the therapeutic efficacy of microemulsion-based delivery of histidine-capped silver nanoparticles in eradicating Klebsiella pneumoniae-induced burn wound infection. The developed microemulsion was characterized on the basis of differential light scattering, phase separation, refractive index, and specific conductance. Emulgel was prepared and characterized on the basis of thixotropy, texture, differential scanning calorimetry, and release kinetics. Emulgel was further evaluated in skin irritation and in vivo studies, namely full-thickness K. pneumoniae-induced burn wound infection treatment via topical route. Efficacy of treatment was evaluated in terms of bacterial load, histopathology, wound contraction, and other infection markers. The developed emulgel provided significant in vivo antibacterial activity of histidine-capped silver nanoparticle preparations via topical route and resulted in reduction in bacterial load, wound contraction, and enhanced skin healing as well as decrement of inflammatory markers such as malondialdehyde, myeloperoxidase, and reactive nitrogen intermediate compared to untreated animals. The present study encourages the further employment of histidine-capped silver nanoparticles along with microemulsion-based drug delivery system in combating antibiotic-resistant topical infections.
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68
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Talaat SM, Elnaggar YSR, Abdalla OY. Lecithin Microemulsion Lipogels Versus Conventional Gels for Skin Targeting of Terconazole: In Vitro, Ex Vivo, and In Vivo Investigation. AAPS PharmSciTech 2019; 20:161. [PMID: 30969396 DOI: 10.1208/s12249-019-1374-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 03/19/2019] [Indexed: 11/30/2022] Open
Abstract
Topical treatment of fungal infections has several superiorities over oral treatment. However, the greatest challenge for dermal delivery is the stratum corneum which is considered an effective barrier for penetration of most antifungal drugs into deeper skin layers. Terconazole (Tr), which is the first marketed triazole antifungal, was reported to be one of the most active azoles against vaginal candidiasis. Nevertheless, our work group is the first to investigate the potential of Tr in the treatment of skin mycosis via integration into lecithin microemulsion-based lipogels (LMBGs). The microemulsion regions of the investigated systems were detected through ternary phase diagrams. The in vitro characterization studies revealed promising physicochemical merits for the selected LMBGs as well as satisfactory in vitro antifungal activity. The current research work was endeavored to investigate the potential of such novel Tr-loaded LMBGs in comparison with conventional gels. Ex vivo permeation and retention studies in addition to in vivo deposition study showed a significant improvement in the permeability of Tr through animal skin from LMBGs compared to other conventional gels. Furthermore, the optimized microemulsion lipogel proved to be safe and a nonirritant to experimental animals through the acute sensitivity study and histological skin examination. Overall, lecithin-based microemulsion lipogels of different composition confirmed their potential as interesting nanocarriers for skin delivery of terconazole compared to current therapy.
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69
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Mojeiko G, de Brito M, Salata GC, Lopes LB. Combination of microneedles and microemulsions to increase celecoxib topical delivery for potential application in chemoprevention of breast cancer. Int J Pharm 2019; 560:365-376. [DOI: 10.1016/j.ijpharm.2019.02.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 01/23/2019] [Accepted: 02/06/2019] [Indexed: 12/16/2022]
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70
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Chaulmoogra oil based methotrexate loaded topical nanoemulsion for the treatment of psoriasis. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.12.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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71
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Mazzotta E, Oliviero Rossi C, Muzzalupo R. Different BRIJ97 colloid systems as potential enhancers of acyclovir skin permeation and depot. Colloids Surf B Biointerfaces 2019; 173:623-631. [DOI: 10.1016/j.colsurfb.2018.10.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/09/2018] [Accepted: 10/16/2018] [Indexed: 10/28/2022]
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72
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Bubic Pajic N, Nikolic I, Mitsou E, Papadimitriou V, Xenakis A, Randjelovic D, Dobricic V, Smitran A, Cekic N, Calija B, Savic S. Biocompatible microemulsions for improved dermal delivery of sertaconazole nitrate: Phase behavior study and microstructure influence on drug biopharamaceutical properties. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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73
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Qurt MS, Esentürk İ, Birteksöz Tan S, Erdal MS, Araman A, Güngör S. Voriconazole and sertaconazole loaded colloidal nano-carriers for enhanced skin deposition and improved topical fungal treatment. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.09.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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74
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Transdermal Delivery of Ketorolac Tromethamine Using Microemulsion Vehicles. Jundishapur J Nat Pharm Prod 2018. [DOI: 10.5812/jjnpp.69056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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75
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76
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Kiselmann C, Dobler D, Schmidts T, Eicher AC, Möbs C, Pfützner W, Runkel F. Development of a skin-friendly microemulsion for dermal allergen-specific immunotherapy. Int J Pharm 2018; 550:463-469. [PMID: 30194011 DOI: 10.1016/j.ijpharm.2018.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/30/2018] [Accepted: 09/04/2018] [Indexed: 01/29/2023]
Abstract
Due to their role in immune responses, the skin dendritic cells (i.e. epidermal Langerhans cells and dermal dendritic cells) have become of great interest to researchers in the past decades. A dermal administration of allergens could target these professional antigen-presenting cells directly and build up immunotolerance. Additionally, many of the adverse side effects, which are seen in the current state of the art specific immunotherapy routes, could be avoided. Therefore, in this study a penetration enhancing microemulsion was developed and its physicochemical properties were determined under several storage conditions. The influence of different preservatives on the microemulsion stability was observed. We examined epidermal penetration of Alexa Fluor-647 labelled bee-venom phospholipase A2 (Api m 1) using the Franz diffusion cell set up and confocal laser-scanning microscopy. First results of an in-vivo Api m 1-allergic mouse model indicated the protective efficacy of dermal AIT with our newly developed microemulsion. Summarily, the developed microemulsion is a suitable, stable drug delivery system for the topical administration of proteogenic allergens into the epidermis and is able to reach dendritic cells in the skin.
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Affiliation(s)
- C Kiselmann
- Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen - University of Applied Sciences, Wiesenstraße 14, 35390 Giessen, Germany.
| | - D Dobler
- Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen - University of Applied Sciences, Wiesenstraße 14, 35390 Giessen, Germany
| | - T Schmidts
- Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen - University of Applied Sciences, Wiesenstraße 14, 35390 Giessen, Germany
| | - A C Eicher
- Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen - University of Applied Sciences, Wiesenstraße 14, 35390 Giessen, Germany
| | - C Möbs
- Clinical & Experimental Allergology, Department of Dermatology and Allergology, Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - W Pfützner
- Clinical & Experimental Allergology, Department of Dermatology and Allergology, Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - F Runkel
- Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen - University of Applied Sciences, Wiesenstraße 14, 35390 Giessen, Germany; Faculty of Biology and Chemistry, Justus Liebig University, Ludwigstraße 23, 35390 Giessen, Germany
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77
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Benigni M, Pescina S, Grimaudo MA, Padula C, Santi P, Nicoli S. Development of microemulsions of suitable viscosity for cyclosporine skin delivery. Int J Pharm 2018; 545:197-205. [PMID: 29698819 DOI: 10.1016/j.ijpharm.2018.04.049] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 12/20/2022]
Abstract
Psoriasis is a widespread chronic disease affecting 2-4% of the population in Western countries. Its mild-to-moderate form, representing approximately 80% of the total cases, is treated by topical application, with corticosteroid being the standard treatment. However, in case of psoriasis, no single treatment works for every patient and optimizing topical therapy is a key aspect. A possible alternative is represented by cyclosporine, an immunosuppressant cyclic peptide administered orally in the treatment of the severe form. Its topical application could avoid the problems related to systemic immunosuppression, but the unfavourable physico-chemical properties (MW: 1202 Da; LogP ≈ 3) hinder its permeation across the stratum corneum. The aim of the paper was the preparation, characterization and ex-vivo evaluation of cyclosporine loaded microemulsions using oleic acid as oil phase, either Tween®80 or a soluble derivative of vitamin E (TPGS) as surfactants and either Transcutol®, propylene glycol or 1,3 propanediol as co-surfactants. The issue of formulation viscosity was also addressed 1) by evaluating the thickening of Tween®80-based microemulsions by direct addition of different rheological modifiers, 2) by building pseudo-ternary phase diagrams using TPGS, to identify the water/oil/surfactants proportions resulting in viscous self-gelifying systems. Nine formulations (five Tween®80-based and four TPGS-based) were selected, characterized in terms of droplets size (low viscosity systems) or rheological properties (high viscosity systems), loaded with 6 mg/g cyclosporine and applied ex-vivo on porcine skin for 22 h. A relevant skin accumulation was obtained either with a low-viscosity Tween®80-based microemulsion (9.78 ± 3.86 µg/cm2), or with a high viscosity TPGS-based microemulsion (18.3 ± 5.69 µg/cm2), with an increase of about 3 and 6 times respectively for comparison with a control cyclosporine solution in propylene glycol. The role of water content, surfactant, co-surfactant and viscosity was also addressed and discussed. The kinetic of skin uptake from the best performing formulation was finally evaluated, highlighting a relatively quick skin uptake and the achievement, after 2 h of contact, of potentially therapeutic cyclosporine skin concentrations.
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Affiliation(s)
- Marta Benigni
- Food and Drug Department, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Silvia Pescina
- Food and Drug Department, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | | | - Cristina Padula
- Food and Drug Department, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Patrizia Santi
- Food and Drug Department, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Sara Nicoli
- Food and Drug Department, Parco Area delle Scienze 27/A, 43124 Parma, Italy.
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78
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Laneri S, Sacchi A, Fratter A, Bertin W, Bino A, Vertuani S, Manfredini S. Self-Nanoemulsifying System in the Accumulation of Resveratrol and N- Acetylcysteine in the Epidermis and Dermis. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701201135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Trans-resveratrol (RES) and N-acetylcysteine (NAC) have protective effects on biological processes; therefore, they are frequently included in food supplements. Their possible applications for the prevention of free radical-induced damage to the skin are of particular physiological relevance; however, their usefulness is limited by their metabolic fate and the unpredictability of their delivery to the skin following oral administration. In this work, we evaluated the concomitant and direct application of RES and NAC on the skin using a self-nanoemulsifying system we previously developed for the oral delivery of poorly absorbed food supplements. We evaluated the capability of this system to increase RES and NAC accumulation in porcine skin using permeation studies in Franz diffusion cells. The ascorbyl palmitate (ASP) self-nanoemulsifying system considerably increased RES and NAC accumulation in the epidermis and dermis, which peaked 6 h after application. This study reveals a new formulation strategy to improve the bioavailability of ingredients, which was previously used in the health supplements field, but has rarely been employed in dermatology because of its poor distribution in the skin.
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Affiliation(s)
- Sonia Laneri
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
| | - Antonia Sacchi
- Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
| | - Andrea Fratter
- LABOMAR RESEARCH, Via N. Sauro 35/I, 31036 Istrana (TV), Italy
| | - Walter Bertin
- LABOMAR RESEARCH, Via N. Sauro 35/I, 31036 Istrana (TV), Italy
| | - Alessia Bino
- Department of Life Science and Biotechnology, Master Course in Cosmetic Science and Technology, University of Ferrara, via Fossato di Mortara 17, 44121 Ferrara, Italy
| | - Silvia Vertuani
- Department of Life Science and Biotechnology, Master Course in Cosmetic Science and Technology, University of Ferrara, via Fossato di Mortara 17, 44121 Ferrara, Italy
| | - Stefano Manfredini
- Department of Life Science and Biotechnology, Master Course in Cosmetic Science and Technology, University of Ferrara, via Fossato di Mortara 17, 44121 Ferrara, Italy
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79
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Topical Nano and Microemulsions for Skin Delivery. Pharmaceutics 2017; 9:pharmaceutics9040037. [PMID: 28934172 PMCID: PMC5750643 DOI: 10.3390/pharmaceutics9040037] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 11/17/2022] Open
Abstract
Nanosystems such as microemulsions (ME) and nanoemulsions (NE) offer considerable opportunities for targeted drug delivery to and via the skin. ME and NE are stable colloidal systems composed of oil and water, stabilised by a mixture of surfactants and cosurfactants, that have received particular interest as topical skin delivery systems. There is considerable scope to manipulate the formulation components and characteristics to achieve optimal bioavailability and minimal skin irritancy. This includes the incorporation of established chemical penetration enhancers to fluidize the stratum corneum lipid bilayers, thus reducing the primary skin barrier and increasing permeation. This review discusses nanosystems with utility in skin delivery and focuses on the composition and characterization of ME and NE for topical and transdermal delivery. The mechanism of skin delivery across the stratum corneum and via hair follicles is reviewed with particular focus on the influence of formulation.
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80
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Telò I, Favero ED, Cantù L, Frattini N, Pescina S, Padula C, Santi P, Sonvico F, Nicoli S. Gel-like TPGS-Based Microemulsions for Imiquimod Dermal Delivery: Role of Mesostructure on the Uptake and Distribution into the Skin. Mol Pharm 2017; 14:3281-3289. [DOI: 10.1021/acs.molpharmaceut.7b00348] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Isabella Telò
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Elena Del Favero
- Department
of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Via F.lli Cervi, 93, 20090 Segrate, Italy
| | - Laura Cantù
- Department
of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Via F.lli Cervi, 93, 20090 Segrate, Italy
| | - Noemi Frattini
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Silvia Pescina
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Cristina Padula
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Patrizia Santi
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Fabio Sonvico
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Sara Nicoli
- Food
and Drug Department, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
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81
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Kaur G, Mehta S. Developments of Polysorbate (Tween) based microemulsions: Preclinical drug delivery, toxicity and antimicrobial applications. Int J Pharm 2017. [DOI: 10.1016/j.ijpharm.2017.06.059] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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82
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Carvalho VFM, Migotto A, Giacone DV, de Lemos DP, Zanoni TB, Maria-Engler SS, Costa-Lotufo LV, Lopes LB. Co-encapsulation of paclitaxel and C6 ceramide in tributyrin-containing nanocarriers improve co-localization in the skin and potentiate cytotoxic effects in 2D and 3D models. Eur J Pharm Sci 2017; 109:131-143. [PMID: 28735040 DOI: 10.1016/j.ejps.2017.07.023] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/10/2017] [Accepted: 07/18/2017] [Indexed: 12/31/2022]
Abstract
Considering that tumor development is generally multifactorial, therapy with a combination of agents capable of potentiating cytotoxic effects is promising. In this study, we co-encapsulated C6 ceramide (0.35%) and paclitaxel (0.50%) in micro and nanoemulsions containing tributyrin (a butyric acid pro-drug included for potentiation of cytotoxicity), and compared their ability to co-localize the drugs in viable skin layers. The nanoemulsion delivered 2- and 2.4-fold more paclitaxel into viable skin layers of porcine skin in vitro at 4 and 8h post-application than the microemulsion, and 1.9-fold more C6 ceramide at 8h. The drugs were co-localized mainly in the epidermis, suggesting the nanoemulsion ability for a targeted delivery. Based on this result, the nanoemulsion was selected for evaluation of the nanocarrier-mediated cytotoxicity against cells in culture (2D model) and histological changes in a 3D melanoma model. Encapsulation of the drugs individually decreased the concentration necessary to reduce melanoma cells viability to 50% (EC50) by approximately 4- (paclitaxel) and 13-fold (ceramide), demonstrating an improved nanoemulsion-mediated drug delivery. Co-encapsulation of paclitaxel and ceramide further decreased EC50 by 2.5-4.5-fold, and calculation of the combination index indicated a synergistic effect. Nanoemulsion topical administration on 3D bioengineered melanoma models for 48h promoted marked epidermis destruction, with only few cells remaining in this layer. This result demonstrates the efficacy of the nanoemulsion, but also suggests non-selective cytotoxic effects, which highlights the importance of localizing the drugs within cutaneous layers where the lesions develop to avoid adverse effects.
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Affiliation(s)
| | - Amanda Migotto
- Institute of Biomedical Sciences, University of São Paulo, Brazil
| | | | | | - Thalita B Zanoni
- School of Pharmaceutical Sciences, University of São Paulo, Brazil
| | | | | | - Luciana B Lopes
- Institute of Biomedical Sciences, University of São Paulo, Brazil.
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83
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Carvalho VF, de Lemos DP, Vieira CS, Migotto A, Lopes LB. Potential of Non-aqueous Microemulsions to Improve the Delivery of Lipophilic Drugs to the Skin. AAPS PharmSciTech 2017; 18:1739-1749. [PMID: 27757922 DOI: 10.1208/s12249-016-0643-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 09/22/2016] [Indexed: 11/30/2022] Open
Abstract
In this study, non-aqueous microemulsions were developed because of the challenges associated with finding pharmaceutically acceptable solvents for topical delivery of drugs sparingly soluble in water. The formulation irritation potential and ability to modulate the penetration of lipophilic compounds (progesterone, α-tocopherol, and lycopene) of interest for topical treatment/prevention of skin disorders were evaluated and compared to solutions and aqueous microemulsions of similar composition. The microemulsions (ME) were developed with BRIJ, vitamin E-TPGS, and ethanol as surfactant-co-surfactant blend and tributyrin, isopropyl myristate, and oleic acid as oil phase. As polar phase, propylene glycol (MEPG) or water (MEW) was used (26% w/w). The microemulsions were isotropic and based on viscosity and conductivity assessment, bicontinuous. Compared to drug solutions in lipophilic vehicles, MEPG improved drug delivery into viable skin layers by 2.5-38-fold; the magnitude of penetration enhancement mediated by MEPG into viable skin increased with drug lipophilicity, even though the absolute amount of drug delivered decreased. Delivery of progesterone and tocopherol, but not lycopene (the most lipophilic compound), increased up to 2.5-fold with MEW, and higher amounts of these two drugs were released from MEW (2-2.5-fold). Both microemulsions were considered safe for topical application, but MEPG-mediated decrease in the viability of reconstructed epidermis was more pronounced, suggesting its higher potential for irritation. We conclude that MEPG is a safe and suitable nanocarrier to deliver a variety of lipophilic drugs into viable skin layers, but the use of MEW might be more advantageous for drugs in the lower range of lipophilicity.
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84
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Hajjar B, Zier KI, Khalid N, Azarmi S, Löbenberg R. Evaluation of a microemulsion-based gel formulation for topical drug delivery of diclofenac sodium. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2017. [DOI: 10.1007/s40005-017-0327-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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85
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Application of d-α-tocopheryl polyethylene glycol 1000 succinate (TPGS) in transdermal and topical drug delivery systems (TDDS). JOURNAL OF PHARMACEUTICAL INVESTIGATION 2017. [DOI: 10.1007/s40005-016-0300-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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86
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Telò I, Pescina S, Padula C, Santi P, Nicoli S. Mechanisms of imiquimod skin penetration. Int J Pharm 2016; 511:516-523. [PMID: 27452419 DOI: 10.1016/j.ijpharm.2016.07.043] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 07/19/2016] [Accepted: 07/20/2016] [Indexed: 12/31/2022]
Abstract
Imiquimod (IMQ) ia an immunostimulating drug used for the treatment of neoplastic skin diseases, such as actinic keratosis (AK) and superficial basal cell carcinoma (sBCC), and as adjuvant for vaccination. Imiquimod formulation and skin delivery is highly challenging because of its very low solubility in most pharmaceutical excipients and poor penetration properties. Objectives of the work were: (1) to evaluate IMQ solubility in different solvents and pharmaceutical excipients; (2) to evaluate IMQ skin retention after the application of simple saturated solutions; (3) to evaluate the role of stratum corneum and solvent uptake on IMQ skin retention and (4) to formulate IMQ in microemulsions - prepared using previously investigated components - and compare them with the commercial formulation. The results show that IMQ solubility is not related to the solubility parameter of the solvents considered. The highest solubility was found with oleic acid (74mg/ml); in the case of PEGs, the solubility increased linearly with MW (PEG 200: 1.9mg/ml; PEG 400 7.3mg/ml, PEG 600 12.8mg/ml). Imiquimod skin retention from saturated solutions (Tween 80, oleic acid, propylene glycol, PEG 200, PEG 400, PEG 600, Transcutol, 2-pyrrolidone, DMSO) resulted relatively similar, being 1.6μg/cm(2) in case of oleic acid (solubility 74mg/ml) and 0.18μg/cm(2) in case of propylene glycol (solubility 0.60mg/ml). Permeation experiments on stripped skin (no stratum corneum) and isolated dermis as well as uptake experiments on isolated stratum corneum sheets demonstrated that IMQ accumulation is related to skin solvent uptake. Finally, microemulsions (MEs) prepared with the above-studied components demonstrated a very good performance. In particular, a ME composed of 10% oleic acid, 35% Transcutol, 35% Tween 80 and 20% water is able to accumulate the same amount of drug as the commercial formulation but with far more efficiency, since its concentration was 12 times lower.
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Affiliation(s)
- Isabella Telò
- Department of Pharmacy, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Silvia Pescina
- Department of Pharmacy, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Cristina Padula
- Department of Pharmacy, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Patrizia Santi
- Department of Pharmacy, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - Sara Nicoli
- Department of Pharmacy, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy.
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87
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Kuznetsova EG, Ryzhikova VA, Salomatina LA, Sevastianov VI. TRANSDERMAL DRUG DELIVERY AND METHODS TO ENHANCE IT. RUSSIAN JOURNAL OF TRANSPLANTOLOGY AND ARTIFICIAL ORGANS 2016. [DOI: 10.15825/1995-1191-2016-2-152-162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The paper presents the common methods employed in recent years for enhancing transdermal delivery of drug substances when applying transdermal therapeutic delivery systems. The chemical, physical and mechanical methods to enhance the transport of macromolecular compounds through the skin are considered in details.
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Affiliation(s)
- E. G. Kuznetsova
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs, Moscow
| | - V. A. Ryzhikova
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs, Moscow
| | - L. A. Salomatina
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs, Moscow
| | - V. I. Sevastianov
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs, Moscow
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88
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Pepe D, Carvalho VF, McCall M, de Lemos DP, Lopes LB. Transportan in nanocarriers improves skin localization and antitumor activity of paclitaxel. Int J Nanomedicine 2016; 11:2009-19. [PMID: 27274232 PMCID: PMC4869655 DOI: 10.2147/ijn.s97331] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
In this study, the ability of nanocarriers containing protein transduction domains (PTDs) of various classes to improve cutaneous paclitaxel delivery and efficacy in skin tumor models was evaluated. Microemulsions (MEs) were prepared by mixing a surfactant blend (polyoxyethylene 10 oleoyl ether, ethanol and propylene glycol), monocaprylin, and water. The PTD transportan (ME-T), penetratin (ME-P), or TAT (ME-TAT) was added at a concentration of 1 mM to the plain ME. All MEs displayed nanometric size (32.3–40.7 nm) and slight positive zeta potential (+4.1 mV to +6.8 mV). Skin penetration of paclitaxel from the MEs was assessed for 1–12 hours using porcine skin and Franz diffusion cells. Among the PTD-containing formulations, paclitaxel skin (stratum corneum + epidermis and dermis) penetration at 12 hours was maximized with ME-T, whereas ME-TAT provided the lowest penetration (1.6-fold less). This is consistent with the stronger ability of ME-T to increase transepidermal water loss (2.4-fold compared to water) and tissue permeability. The influence of PTD addition on the ME irritation potential was assessed by measuring interleukin-1α expression and viability of bioengineered skin equivalents. A 1.5- to 1.8-fold increase in interleukin-1α expression was induced by ME-T compared to the other formulations, but this effect was less pronounced (5.8-fold) than that mediated by the moderate irritant Triton. Because ME-T maximized paclitaxel cutaneous localization while being safer than Triton, its efficacy was assessed against basal cell carcinoma cells and a bioengineered three-dimensional melanoma model. Paclitaxel-containing ME-T reduced cells and tissue viability by twofold compared to drug solutions, suggesting the potential clinical usefulness of the formulation for the treatment of cutaneous tumors.
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Affiliation(s)
- Dominique Pepe
- Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences, Albany, NY, USA
| | - Vanessa Fm Carvalho
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Melissa McCall
- Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences, Albany, NY, USA
| | - Débora P de Lemos
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Luciana B Lopes
- Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences, Albany, NY, USA; Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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89
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Erdal MS, Özhan G, Mat MC, Özsoy Y, Güngör S. Colloidal nanocarriers for the enhanced cutaneous delivery of naftifine: characterization studies and in vitro and in vivo evaluations. Int J Nanomedicine 2016; 11:1027-37. [PMID: 27042058 PMCID: PMC4798209 DOI: 10.2147/ijn.s96243] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
In topical administration of antifungals, the drugs should pass the stratum corneum to reach lower layers of the skin in effective concentrations. Thus, the formulation of antifungal agents into a suitable delivery system is important for the topical treatment of fungal infections. Nanosized colloidal carriers have gained great interest during the recent years to serve as efficient promoters of drug penetration into the skin. Microemulsions are soft colloidal nanosized drug carriers, which are thermodynamically stable and isotropic systems. They have been extensively explored for the enhancement of skin delivery of drugs. This study was carried out to exploit the feasibility of colloidal carriers as to improve skin transport of naftifine, which is an allylamine antifungal drug. The microemulsions were formulated by construction of pseudoternary phase diagrams and composed of oleic acid (oil phase), Kolliphor® EL or Kolliphor® RH40 (surfactant), Transcutol® (cosurfactant), and water (aqueous phase). The plain and drug-loaded microemulsions were characterized in terms of isotropy, particle size and size distribution, pH value, refractive index, viscosity, and conductivity. The in vitro skin uptake of naftifine from microemulsions was studied using tape stripping technique in pig skin. The drug penetrated significantly into stratum corneum from microemulsions compared to its marketed cream (P<0.05). Moreover, the microemulsion formulations led to highly significant amount of naftifine deposition in deeper layers of skin than that of commercial formulation (P<0.001). Microemulsion–skin interaction was confirmed by attenuated total reflectance – Fourier transformed infrared spectroscopy data, in vitro. The results of the in vivo tape stripping experiment showed similar trends as the in vitro skin penetration study. Topical application of the microemulsion on human forearms in vivo enhanced significantly the distribution and the amount of naftifine penetrated into the stratum corneum as compared to the marketed formulation (P<0.05). The relative safety of the microemulsion formulations was demonstrated with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide viability test. This study indicated that the nanosized colloidal carriers developed could be considered as an effective and safe topical delivery system for naftifine.
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Affiliation(s)
- M Sedef Erdal
- Department of Pharmaceutical Technology, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Gül Özhan
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - M Cem Mat
- Department of Dermatology, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Yıldız Özsoy
- Department of Pharmaceutical Technology, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Sevgi Güngör
- Department of Pharmaceutical Technology, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey
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90
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Liuzzi R, Carciati A, Guido S, Caserta S. Transport efficiency in transdermal drug delivery: What is the role of fluid microstructure? Colloids Surf B Biointerfaces 2016; 139:294-305. [DOI: 10.1016/j.colsurfb.2015.11.064] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/24/2015] [Accepted: 11/22/2015] [Indexed: 02/02/2023]
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91
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Ita K. Progress in the use of microemulsions for transdermal and dermal drug delivery. Pharm Dev Technol 2016; 22:467-475. [PMID: 26931453 DOI: 10.3109/10837450.2016.1148722] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kevin Ita
- College of Pharmacy, Touro University, Mare Island-Vallejo, CA, USA
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92
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Abstract
This review aims to concisely chart the development of two individual research fields, namely nanomedicines, with specific emphasis on nanoparticles (NP) and microparticles (MP), and microneedle (MN) technologies, which have, in the recent past, been exploited in combinatorial approaches for the efficient delivery of a variety of medicinal agents across the skin. This is an emerging and exciting area of pharmaceutical sciences research within the remit of transdermal drug delivery and as such will undoubtedly continue to grow with the emergence of new formulation and fabrication methodologies for particles and MN. Firstly, the fundamental aspects of skin architecture and structure are outlined, with particular reference to their influence on NP and MP penetration. Following on from this, a variety of different particles are described, as are the diverse range of MN modalities currently under development. The review concludes by highlighting some of the novel delivery systems which have been described in the literature exploiting these two approaches and directs the reader towards emerging uses for nanomedicines in combination with MN.
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93
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Adawiyah N, Moniruzzaman M, Hawatulaila S, Goto M. Ionic liquids as a potential tool for drug delivery systems. MEDCHEMCOMM 2016. [DOI: 10.1039/c6md00358c] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The pharmaceutical industries face a series of challenges in the delivery of many newly developed drug molecules because of their low solubility, bioavailability, stability and polymorphic conversion.
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Affiliation(s)
- Noorul Adawiyah
- Centre of Research in Ionic Liquids (CORIL)
- Universiti Teknologi PETRONAS Bandar Seri Iskandar
- Malaysia
| | - Muhammad Moniruzzaman
- Centre of Research in Ionic Liquids (CORIL)
- Universiti Teknologi PETRONAS Bandar Seri Iskandar
- Malaysia
- Department of Chemical Engineering
- Universiti Teknologi PETRONAS Bandar Seri Iskandar
| | - Siti Hawatulaila
- Centre of Research in Ionic Liquids (CORIL)
- Universiti Teknologi PETRONAS Bandar Seri Iskandar
- Malaysia
| | - Masahiro Goto
- Deaprtment of Applied Chemistry
- Graduate School of Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
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94
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Phase behavior, microstructural transition, antimicrobial and antioxidant activities of a water-dilutable thymol microemulsion. Colloids Surf B Biointerfaces 2015; 136:859-66. [DOI: 10.1016/j.colsurfb.2015.10.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 09/15/2015] [Accepted: 10/20/2015] [Indexed: 11/23/2022]
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95
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Abstract
To achieve an efficient skin penetration of most compounds it is necessary to overcome the barrier function of the skin, provided mainly (but not only) by the stratum corneum. Among various strategies used or studied to date, chemical penetration enhancers are the most frequently employed with one of the longest histories of use. There is a multitude of agents described as penetration enhancers, and they present varying properties and structures. In this manuscript, we aim to provide a brief overview of traditional enhancers and some of their properties, focusing on the benefits of combination of chemical enhancers and on selected novel compounds that have shown promise to increase drug delivery into/across the skin.
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96
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Colloidal carriers of isotretinoin for topical acne treatment: skin uptake, ATR-FTIR and in vitro cytotoxicity studies. Arch Dermatol Res 2015; 307:607-15. [DOI: 10.1007/s00403-015-1566-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/20/2015] [Accepted: 04/11/2015] [Indexed: 10/23/2022]
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97
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Topical microemulsion containing Punica granatum extract: its control over skin erythema and melanin in healthy Asian subjects. Postepy Dermatol Alergol 2015; 31:351-5. [PMID: 25610348 PMCID: PMC4293390 DOI: 10.5114/pdia.2014.47117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 06/15/2014] [Accepted: 09/10/2014] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Punica granatum is apotent source of polyphenolic compounds with strong free radicals scavenging activity. The skin lightening effects of Punica granatum are assumed due to ellagic acid which acts by chelating copper at the active site of tyrosinase. AIM To explore a topical microemulsion (O/W) of pomegranate (Punica granatum) extract for its control on skin erythema and melanin. MATERIAL AND METHODS Microemulsions were formulated using a polysorbate surfactant (Tween 80(®)) along with cosurfactant (propylene glycol) and were characterized regarding their stability. The placebo microemulsion (without extract) and the active microemulsion (containing Punica extract) were applied in a split face fashion by the volunteers (n = 11) for a period of 12 weeks. Skin erythema and melanin were measured at baseline and after every 15 days to determine any effect produced by these formulations. RESULTS Active formulation showed a significant impact on skin erythema and melanin (p < 0.05). CONCLUSIONS This study reveals that a suitable topical formulation like microemulsion could employ the Punica granatum extract for conditions where elevated skin melanin and erythema have significantly prone skin physiology.
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98
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Shen LN, Zhang YT, Wang Q, Xu L, Feng NP. Preparation and evaluation of microemulsion-based transdermal delivery of total flavone of rhizoma arisaematis. Int J Nanomedicine 2014; 9:3453-64. [PMID: 25092976 PMCID: PMC4113406 DOI: 10.2147/ijn.s66524] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The aims of the present study were to investigate the skin permeation and cellular uptake of a microemulsion (ME) containing total flavone of rhizoma arisaematis (TFRA), and to evaluate its effects on skin structure. Pseudo-ternary phase diagrams were constructed to evaluate ME regions with various surfactants and cosurfactants. Eight formulations of oil-in-water MEs were selected as vehicles, and in vitro skin-permeation experiments were performed to optimize the ME formulation and to evaluate its permeability, in comparison to that of an aqueous suspension. Laser scanning confocal microscopy and fluorescent-activated cell sorting were used to explore the cellular uptake of rhodamine 110-labeled ME in human epidermal keratinocytes (HaCaT) and human embryonic skin fibroblasts (CCC-ESF-1). The structure of stratum corneum treated with ME was observed using a scanning electron microscope. Furthermore, skin irritation was tested to evaluate the safety of ME. ME formulated with 4% ethyl oleate (weight/weight), 18% Cremophor EL® (weight/weight), and 18% Transcutol® P, with 1% Azone to enhance permeation, showed good skin permeability. ME-associated transdermal fluxes of schaftoside and isoschaftoside, two major effective constituents of TFRA, were 3.72-fold and 5.92-fold higher, respectively, than those achieved using aqueous suspensions. In contrast, in vitro studies revealed that uptake by HaCaT and CCC-ESF-1 cells was lower with ME than with an aqueous suspension. Stratum corneum loosening and shedding was observed in nude mouse skin treated with ME, although ME produced no observable skin irritation in rabbits. These findings indicated that ME enhanced transdermal TFRA delivery effectively and showed good biocompatibility with skin tissue.
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Affiliation(s)
- Li-Na Shen
- Department of Pharmaceutical Sciences, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Yong-Tai Zhang
- Department of Pharmaceutical Sciences, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Qin Wang
- Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Ling Xu
- Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Nian-Ping Feng
- Department of Pharmaceutical Sciences, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
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99
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Thomas S, Vieira CS, Hass MA, Lopes LB. Stability, cutaneous delivery, and antioxidant potential of a lipoic acid and α-tocopherol codrug incorporated in microemulsions. J Pharm Sci 2014; 103:2530-8. [PMID: 24961388 DOI: 10.1002/jps.24053] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 11/08/2022]
Abstract
The aim of this study was to assess the skin penetration, stability, and antioxidant effects of a α-tocopherol-lipoic acid codrug. To enhance penetration, we evaluated three microemulsions varying in water content and composition of the oil phase (isopropyl myristate with either monocaprylin or oleic acid). The codrug was incorporated at 1% (w/w). Codrug hydrolysis in the microemulsion increased with increases in time (up to 48 h) and formulation water content (10%-30%, w/w). Microemulsions increased the codrug delivery into viable layers of porcine ear skin by 2.9-7.8-fold compared with a control formulation (20% monocaprylin in isopropyl myristate) after 24 h. Penetration enhancement was influenced by the oil phase, with the formulation containing monocaprylin displaying the most pronounced effect. Antioxidant activity, assessed in skin bioequivalents using the thiobarbituric acid-reactive substances (TBARS) assay, demonstrated that TBARS levels decreased by 39% after treatment with the codrug-containing microemulsion compared with the unloaded formulation. In addition to the codrug, tocopherol (8.2 ± 0.6 μg/cm(2)) was detected in the viable bioequivalent tissues, suggesting that the codrug was partly hydrolyzed after 12 h. Taken together, these results support the potential of nanodispersed formulations containing a tocopherol-lipoic acid codrug to improve skin antioxidant activity.
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Affiliation(s)
- Siji Thomas
- Albany College of Pharmacy and Health Sciences, Albany, New York
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100
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Topical delivery of aceclofenac: challenges and promises of novel drug delivery systems. BIOMED RESEARCH INTERNATIONAL 2014; 2014:406731. [PMID: 25045671 PMCID: PMC4086417 DOI: 10.1155/2014/406731] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 12/16/2022]
Abstract
Osteoarthritis (OA), a common musculoskeletal disorder, is projected to affect about 60 million people of total world population by 2020. The associated pain and disability impair the quality of life and also pose economic burden to the patient. Nonsteroidal anti-inflammatory drugs (NSAIDs) are widely prescribed in OA, while diclofenac is the most prescribed one. Oral NSAIDs are not very patient friendly, as they cause various gastrointestinal adverse effects like bleeding, ulceration, and perforation. To enhance the tolerability of diclofenac and decrease the common side effects, aceclofenac (ACE) was developed by its chemical modification. As expected, ACE is more well-tolerated than diclofenac and possesses superior efficacy but is not completely devoid of the NSAID-tagged side effects. A series of chemical modifications of already planned drug is unjustified as it consumes quanta of time, efforts, and money, and this approach will also pose stringent regulatory challenges. Therefore, it is justified to deliver ACE employing tools of drug delivery and nanotechnology to refine its safety profile. The present review highlights the constraints related to the topical delivery of ACE and the various attempts made so far for the safe and effective topical delivery employing the novel materials and methods.
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