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Qiao Y, Wang X, Ren H, Cui Y, Ren J, Hao C, Zhao Z, Liu J, Zhao R, Li Y, Tian Q, Qiu L. A study on the preparation conditions of lidocaine microemulsion based on multi-objective genetic algorithm. Front Pharmacol 2023; 14:1272454. [PMID: 37841920 PMCID: PMC10576434 DOI: 10.3389/fphar.2023.1272454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 09/19/2023] [Indexed: 10/17/2023] Open
Abstract
Background: Topical lidocaine microemulsion preparations with low toxicity, low irritation, strong transdermal capability and convenient administration are urgently needed. Methods: Box-Behnken design was performed for three preparation conditions of 5% lidocaine microemulsions: mass ratio of the mass ratio of surfactant/(oil phase + surfactant) (X1), the mass ratio of olive oil/(α-linolenic acid + linoleic acid) (X2) and the water content W% (X3). Then, five multi-objective genetic algorithms were used to optimize the three evaluation indices to optimize the effects of lidocaine microemulsion preparations. Finally, the ideal optimization scheme was experimentally verified. Results: Non-dominated Sorting Genetic Algorithm-II was used for 30 random searches. Among these, Scheme 2: X1 = 0.75, X2 = 0.35, X3 = 75%, which resulted in Y1 = 0.17 μg/(cm2·s) and Y2 = 0.74 mg/cm2; and the Scheme 19: X1 = 0.68, X2 = 1.42, X3 = 75% which resulted in Y1 = 0.14 μg/(cm2·s) and Y2 = 0.80 mg/cm2, provided the best matches for the objective function requirements. The maximum and average fitness of the method have reached stability after 3 generations of evolution. Experimental verification of the above two schemes showed that there were no statistically significant differences between the measured values of Y1 and Y2 and the predicted values obtained by optimization (p > 0.05) and are close to the target value. Conclusion: Two lidocaine microemulsion preparation protocols were proposed in this study. These preparations resulted in good transdermal performance or long anesthesia duration, respectively.
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Affiliation(s)
- Yuchao Qiao
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xuchun Wang
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Hao Ren
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yu Cui
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Jiahui Ren
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Chongqi Hao
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Zhiyang Zhao
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Jing Liu
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ruiqing Zhao
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yiting Li
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Qingping Tian
- School of Pharmacy, Shanxi Medical University, Taiyuan, China
| | - Lixia Qiu
- Department of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
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2
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Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW, Gill LJ, Heldreth B. Safety Assessment of Polyglyceryl Fatty Acid Esters as Used in Cosmetics. Int J Toxicol 2023:10915818231174440. [PMID: 37279183 DOI: 10.1177/10915818231174440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The Expert Panel for Cosmetic Ingredient Safety (Panel) assessed the safety of 274 polyglyceryl fatty acid esters. Each of the esters in this group is a polyether comprising 2 to 20 glyceryl residues, end-capped by esterification with simple carboxylic acids, such as fatty acids. Most of these ingredients are reported to function in cosmetics as skin-conditioning agents and/or surfactants. The Panel reviewed the available data and considered conclusions from their relevant previous reports, and determined that these ingredients are safe in cosmetics in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating.
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Affiliation(s)
- Monice M Fiume
- Cosmetic Ingredient Review Senior Director, Washington, DC, USA
| | - Wilma F Bergfeld
- Expert Panel for Cosmetic Ingredient Safety Member, Washington, DC, USA
| | - Donald V Belsito
- Expert Panel for Cosmetic Ingredient Safety Member, Washington, DC, USA
| | - Ronald A Hill
- Expert Panel for Cosmetic Ingredient Safety Former Member, Washington, DC, USA
| | - Curtis D Klaassen
- Expert Panel for Cosmetic Ingredient Safety Member, Washington, DC, USA
| | - Daniel C Liebler
- Expert Panel for Cosmetic Ingredient Safety Former Member, Washington, DC, USA
| | - James G Marks
- Expert Panel for Cosmetic Ingredient Safety Former Member, Washington, DC, USA
| | - Ronald C Shank
- Expert Panel for Cosmetic Ingredient Safety Former Member, Washington, DC, USA
| | - Thomas J Slaga
- Expert Panel for Cosmetic Ingredient Safety Member, Washington, DC, USA
| | - Paul W Snyder
- Expert Panel for Cosmetic Ingredient Safety Member, Washington, DC, USA
| | - Lillian J Gill
- Cosmetic Ingredient Review Former Director, Washington, DC, USA
| | - Bart Heldreth
- Cosmetic Ingredient Review Executive Director, Washington, DC, USA
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3
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Souza de Araujo GR, Mendonça da Cruz Macieira G, Xavier de Oliveira D, Santos Matos S, Nery Dos Santos Q, Otubo L, Antunes de Souza Araújo A, Cavalcante Duarte M, Moreira Lira AA, de Souza Nunes R, Vitorino Sarmento VH. Microemulsions formed by PPG-5-CETETH-20 at low concentrations for transdermal delivery of nifedipine: Structural and in vitro study. Colloids Surf B Biointerfaces 2022; 214:112474. [PMID: 35338963 DOI: 10.1016/j.colsurfb.2022.112474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/13/2022] [Accepted: 03/19/2022] [Indexed: 12/26/2022]
Abstract
Nifedipine is a potent anti-hypertensive, which is poorly orally bioavailable on account of first-pass metabolism, short half-life, and low water solubility. This study aimed to develop a microemulsified system with low surfactant concentration and to evaluate the influence of microemulsion (ME) phase behavior on skin permeation of nifedipine, as drug model. Thereafter, MEs were obtained using PPG-5-CETETH-20, oleic acid, and phosphate buffer at pH 5.0. The selected MEs were isotropic, with droplet diameters less than 10 nm, polydispersity index < 0.25, and pH between 5.0 and 5.2. MEs presented low viscosity and Newtonian behavior. SAXS results confirmed bicontinuous and oil-in-water (o/w) MEs formation. The presence of the drug promoted only very slight modifications in the ME structure. The MEs presented ability to deliver nifedipine via the transdermal route when in comparison with the control. Nevertheless, the skin permeated and retained amounts from the o/w and bicontinuous formulations did not differ significantly. The ATR-FTIR demonstrated that both formulations promoted fluidization and disorganization of lipids and increased the drug diffusion and partition coefficients in the skin. In conclusion, PPG-5-CETETH-20 MEs obtained proved to be effective skin permeation enhancers, acting by rising the coefficients of partition and diffusion of the nifedipine in the skin.
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Affiliation(s)
| | - Givalda Mendonça da Cruz Macieira
- Department of Chemistry, Federal University of Sergipe, Av. Vereador Olimpio Grande, Sítio Porto, Itabaiana, s/n 49506-036 SE, Brazil
| | - Dayane Xavier de Oliveira
- Department of Chemistry, Federal University of Sergipe, Av. Vereador Olimpio Grande, Sítio Porto, Itabaiana, s/n 49506-036 SE, Brazil
| | - Saulo Santos Matos
- Department of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jd. Rosa Elze, São Cristóvão, s/n 49100-000 SE, Brazil
| | - Quesia Nery Dos Santos
- Department of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jd. Rosa Elze, São Cristóvão, s/n 49100-000 SE, Brazil
| | - Larissa Otubo
- Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN, Cidade Universitária, Av. Prof. Lineu Prestes, 2242, São Paulo, CEP 05508-000 SP, Brazil
| | - Adriano Antunes de Souza Araújo
- Department of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jd. Rosa Elze, São Cristóvão, s/n 49100-000 SE, Brazil
| | - Marcelo Cavalcante Duarte
- Department of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jd. Rosa Elze, São Cristóvão, s/n 49100-000 SE, Brazil
| | - Ana Amélia Moreira Lira
- Department of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jd. Rosa Elze, São Cristóvão, s/n 49100-000 SE, Brazil
| | - Rogéria de Souza Nunes
- Department of Pharmacy, Federal University of Sergipe, Av. Marechal Rondon, Jd. Rosa Elze, São Cristóvão, s/n 49100-000 SE, Brazil
| | - Victor Hugo Vitorino Sarmento
- Department of Chemistry, Federal University of Sergipe, Av. Vereador Olimpio Grande, Sítio Porto, Itabaiana, s/n 49506-036 SE, Brazil.
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4
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Szumała P, Macierzanka A. Topical delivery of pharmaceutical and cosmetic macromolecules using microemulsion systems. Int J Pharm 2022; 615:121488. [DOI: 10.1016/j.ijpharm.2022.121488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/04/2022] [Accepted: 01/13/2022] [Indexed: 01/29/2023]
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5
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Strati F, Mukhina T, Neubert RH, Opalka L, Hause G, Schmelzer CE, Menzel M, Brezesinski G. Cerosomes as skin repairing agent: Mode of action studies with a model stratum corneum layer at liquid/air and liquid/solid interfaces. BBA ADVANCES 2022; 2:100039. [PMID: 37082599 PMCID: PMC10074917 DOI: 10.1016/j.bbadva.2021.100039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The stratum corneum (SC) is the largest physical barrier of the human body. It protects against physical, chemical and biological damages, and avoids evaporation of water from the deepest skin layers. For its correct functioning, the homeostasis of the SC lipid matrix is fundamental. An alteration of the lipid matrix composition and in particular of its ceramide (CER) fraction can lead to the development of pathologies such as atopic dermatitis and psoriasis. Different studies showed that the direct replenishment of SC lipids on damaged skin had positive effects on the recovery of its barrier properties. In this work, cerosomes, i.e. liposomes composed of SC lipids, have been successfully prepared in order to investigate the mechanism of interaction with a model SC lipid matrix. The cerosomes contain CER[NP], D-CER[AP], stearic acid and cholesterol. In addition, hydrogenated soybean phospholipids have been added to one of the formulations leading to an increased stability at neutral pH. For the mode of action studies, monolayer models at the air-water interface and on solid support have been deployed. The results indicated that a strong interaction occurred between SC monolayers and the cerosomes. Since both systems were negatively charged, the driving force for the interaction must be based on the ability of CERs head groups to establish intermolecular hydrogen bonding networks that energetically prevailed against the electrostatic repulsion. This work proved for the first time the mode of action by which cerosomes exploit their function as skin barrier repairing agents on the SC.
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6
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Giacone DV, Dartora VFMC, de Matos JKR, Passos JS, Miranda DAG, de Oliveira EA, Silveira ER, Costa-Lotufo LV, Maria-Engler SS, Lopes LB. Effect of nanoemulsion modification with chitosan and sodium alginate on the topical delivery and efficacy of the cytotoxic agent piplartine in 2D and 3D skin cancer models. Int J Biol Macromol 2020; 165:1055-1065. [PMID: 32987080 DOI: 10.1016/j.ijbiomac.2020.09.167] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/24/2020] [Accepted: 09/20/2020] [Indexed: 01/11/2023]
Abstract
Due to the limited options for topical management of skin cancer, this study aimed at developing and evaluating nanoemulsions (NE) for topical delivery of the cytotoxic agent piplartine (piperlongumine). NEs were modified with chitosan or sodium alginate, and the effects on the physicochemical properties, piplartine delivery and formulation efficacy were evaluated. The nanoemulsion droplets displayed similar size (96-112 nm), but opposite charge; the polysaccharides improved piplartine penetration into and across the skin (1.3-1.9-fold) in a similar manner, increasing the ratio "drug in the skin/receptor phase" by 1.4-1.5-fold compared to the plain NE and highlighting their relevance for cutaneous localization. Oleic acid addition to the chitosan-containing NE further increased drug penetration (~1.9-2.0-fold), as did increases in drug content from 0.5 to 1%. The cytotoxicity of piplartine was ~2.8-fold higher when the drug was incorporated in the chitosan-containing NE compared to its solution (IC50 = 14.6 μM) against melanoma cells. The effects of this nanocarrier on 3D melanoma tissues were concentration-related; at 1%, piplartine elicited marked epidermis destruction. These results support the potential applicability of the chitosan-modified nanoemulsion containing piplartine as a new strategy for local management of skin cancer.
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Affiliation(s)
- Daniela V Giacone
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | | | | | - Julia S Passos
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Daniel A G Miranda
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Erica A de Oliveira
- School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Edilberto R Silveira
- Department of Inorganic and Organic Chemistry, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | | | - Luciana B Lopes
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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7
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Talianu MT, Dinu-Pîrvu CE, Ghica MV, Anuţa V, Jinga V, Popa L. Foray into Concepts of Design and Evaluation of Microemulsions as a Modern Approach for Topical Applications in Acne Pathology. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2292. [PMID: 33228156 PMCID: PMC7699607 DOI: 10.3390/nano10112292] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 01/19/2023]
Abstract
With a fascinating complexity, governed by multiple physiological processes, the skin is considered a mantle with protective functions which during lifetime are frequently impaired, triggering dermatologic disorders. As one of the most prevalent dermatologic conditions worldwide, characterized by a complex pathogenesis and a high recurrence, acne can affect the patient's quality of life. Smart topical vehicles represent a good option in the treatment of a versatile skin condition. By surpassing the stratum corneum known for diffusional resistance, a superior topical bioavailability can be obtained at the affected place. In this direction, the literature study presents microemulsions as a part of a condensed group of modern formulations. Microemulsions are appreciated for their superior profile in matters of drug delivery, especially for challenging substances with hydrophilic or lipophilic structures. Formulated as transparent and thermodynamically stable systems, using simplified methods of preparation, microemulsions have a simple and clear appearance. Their unique structures can be explained as a function of the formulation parameters which were found to be the mainstay of a targeted therapy.
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Affiliation(s)
- Marina-Theodora Talianu
- Department of Physical and Colloidal Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020950 Bucharest, Romania; (M.-T.T.); (C.-E.D.-P.); (V.A.); (L.P.)
| | - Cristina-Elena Dinu-Pîrvu
- Department of Physical and Colloidal Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020950 Bucharest, Romania; (M.-T.T.); (C.-E.D.-P.); (V.A.); (L.P.)
| | - Mihaela Violeta Ghica
- Department of Physical and Colloidal Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020950 Bucharest, Romania; (M.-T.T.); (C.-E.D.-P.); (V.A.); (L.P.)
| | - Valentina Anuţa
- Department of Physical and Colloidal Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020950 Bucharest, Romania; (M.-T.T.); (C.-E.D.-P.); (V.A.); (L.P.)
| | - Viorel Jinga
- Department of Clinical Sciences, no.3, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Lăcrămioara Popa
- Department of Physical and Colloidal Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020950 Bucharest, Romania; (M.-T.T.); (C.-E.D.-P.); (V.A.); (L.P.)
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8
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Moniz T, Costa Lima SA, Reis S. Human skin models: From healthy to disease-mimetic systems; characteristics and applications. Br J Pharmacol 2020; 177:4314-4329. [PMID: 32608012 PMCID: PMC7484561 DOI: 10.1111/bph.15184] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 06/15/2020] [Accepted: 06/18/2020] [Indexed: 12/17/2022] Open
Abstract
Skin drug delivery is an emerging route in drug development, leading to an urgent need to understand the behaviour of active pharmaceutical ingredients within the skin. Given, As one of the body's first natural defences, the barrier properties of skin provide an obstacle to the successful outcome of any skin drug therapy. To elucidate the mechanisms underlying this barrier, reductionist strategies have designed several models with different levels of complexity, using non-biological and biological components. Besides the detail of information and resemblance to human skin in vivo, offered by each in vitro model, the technical and economic efforts involved must also be considered when selecting the most suitable model. This review provides an outline of the commonly used skin models, including healthy and diseased conditions, in-house developed and commercialized models, their advantages and limitations, and an overview of the new trends in skin-engineered models.
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Affiliation(s)
- Tânia Moniz
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de FarmáciaUniversidade do PortoPortoPortugal
| | - Sofia A. Costa Lima
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de FarmáciaUniversidade do PortoPortoPortugal
| | - Salette Reis
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de FarmáciaUniversidade do PortoPortoPortugal
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9
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Merckx G, Tay H, Lo Monaco M, van Zandvoort M, De Spiegelaere W, Lambrichts I, Bronckaers A. Chorioallantoic Membrane Assay as Model for Angiogenesis in Tissue Engineering: Focus on Stem Cells. TISSUE ENGINEERING PART B-REVIEWS 2020; 26:519-539. [PMID: 32220219 DOI: 10.1089/ten.teb.2020.0048] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tissue engineering aims to structurally and functionally regenerate damaged tissues, which requires the formation of new blood vessels that supply oxygen and nutrients by the process of angiogenesis. Stem cells are a promising tool in regenerative medicine due to their combined differentiation and paracrine angiogenic capacities. The study of their proangiogenic properties and associated potential for tissue regeneration requires complex in vivo models comprising all steps of the angiogenic process. The highly vascularized extraembryonic chorioallantoic membrane (CAM) of fertilized chicken eggs offers a simple, easy accessible, and cheap angiogenic screening tool compared to other animal models. Although the CAM assay was initially primarily performed for evaluation of tumor growth and metastasis, stem cell studies using this model are increasing. In this review, a detailed summary of angiogenic observations of different mesenchymal, cardiac, and endothelial stem cell types and derivatives in the CAM model is presented. Moreover, we focus on the variation in experimental setup, including the benefits and limitations of in ovo and ex ovo protocols, diverse biological and synthetic scaffolds, imaging techniques, and outcome measures of neovascularization. Finally, advantages and disadvantages of the CAM assay as a model for angiogenesis in tissue engineering in comparison with alternative in vivo animal models are described. Impact statement The chorioallantoic membrane (CAM) assay is an easy and cheap screening tool for the angiogenic properties of stem cells and their associated potential in the tissue engineering field. This review offers an overview of all published angiogenic studies of stem cells using this model, with emphasis on the variation in used experimental timeline, culture protocol (in ovo vs. ex ovo), stem cell type (derivatives), scaffolds, and outcome measures of vascularization. The purpose of this overview is to aid tissue engineering researchers to determine the ideal CAM experimental setup based on their specific study goals.
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Affiliation(s)
- Greet Merckx
- Faculty of Medicine and Life Sciences, Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium
| | - Hanna Tay
- Department of Morphology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Melissa Lo Monaco
- Faculty of Medicine and Life Sciences, Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium.,Department of Veterinary Medicine, Faculty of Sciences, Integrated Veterinary Research Unit-Namur Research Institute for Life Science (IVRU-NARILIS), University of Namur, Namur, Belgium
| | - Marc van Zandvoort
- Department of Genetics and Cell Biology, School for Cardiovascular Diseases CARIM and School for Oncology and Development GROW, Maastricht University, Maastricht, the Netherlands
| | - Ward De Spiegelaere
- Department of Morphology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Ivo Lambrichts
- Faculty of Medicine and Life Sciences, Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium
| | - Annelies Bronckaers
- Faculty of Medicine and Life Sciences, Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium
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10
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Sahle FF, Lowe TL. Design strategies for programmable oligonucleotide nanotherapeutics. Drug Discov Today 2020; 25:73-88. [PMID: 31525462 PMCID: PMC6980509 DOI: 10.1016/j.drudis.2019.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 08/02/2019] [Accepted: 09/09/2019] [Indexed: 01/08/2023]
Abstract
A systematic review on how to design different programmable nanotherapeutics using oligonucleotides as building blocks or as surface and matrix modifiers for controlled and targeted delivery of various therapeutic agents in presented.
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Affiliation(s)
- Fitsum Feleke Sahle
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA
| | - Tao L Lowe
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA.
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11
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Szumała P, Jungnickel C, Kozłowska-Tylingo K, Jacyna B, Cal K. Transdermal transport of collagen and hyaluronic acid using water in oil microemulsion. Int J Pharm 2019; 572:118738. [PMID: 31705977 DOI: 10.1016/j.ijpharm.2019.118738] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/24/2019] [Accepted: 09/25/2019] [Indexed: 10/25/2022]
Abstract
Collagen and hyaluronic acid (HA) are biopolymers that affect the appearance and condition of the skin. Delivery of these compounds into the skin is highly challenging since have a number of disadvantageous properties, such as high molecular weight and hydrophilicity. Here, we evaluated the transdermal penetration of low and high molecular weight collagen and HA from microemulsions. A number of microemulsion formulations, differing in the content of polymers and surfactants (i.e. penetration promoters), were used for the permeation study. In addition, a correlation was made between the composition of these microemulsions and the polymers transport efficiency. The results indicate that, microemulsions enable transdermal permeation of collagen and HA. The concentration of polymers and the solubilization capacity of microemulsions had the greatest influence on the permeation. Surprisingly, the molecular weight of polymers and the content of other components affected the size of microemulsion particles, and thus these parameters had an indirect influence on the permeation process. This study demonstrated therefore the potential therapeutic use of microemulsion with collagen and HA in improving and regenerating the barrier of aged or diseased skin.
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Affiliation(s)
- Patrycja Szumała
- Department of Colloid and Lipid Science, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Street 11/12, 80-233 Gdańsk, Poland.
| | - Christian Jungnickel
- Department of Colloid and Lipid Science, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Street 11/12, 80-233 Gdańsk, Poland
| | - Katarzyna Kozłowska-Tylingo
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Street 11/12, 80-233 Gdańsk, Poland
| | - Bianka Jacyna
- Department of Pharmaceutical Technology, Medical University of Gdańsk, Hallera Street 107, 80-416 Gdańsk, Poland
| | - Krzysztof Cal
- Department of Pharmaceutical Technology, Medical University of Gdańsk, Hallera Street 107, 80-416 Gdańsk, Poland
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12
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Abstract
Human skin is the largest organ of the body and is an effective physical barrier keeping it from environmental conditions. This barrier function of the skin is based on stratum corneum, located in the uppermost skin. Stratum corneum has corneocytes surrounded by multilamellar lipid membranes which are composed of cholesterol, free fatty acids and ceramides (CERs). Alterations in ceramide content of the stratum corneum are associated with numerous skin disorders. In recent years, CERs have been incorporated into conventional and novel carrier systems with the purpose of exogenously applying CERs to help the barrier function of the skin. This review provides an overview of the structure, function and importance of CERs to restore the barrier function of the skin following their topical application.
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13
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Topical delivery of 3,5,4'-trimethoxy-trans-stilbene-loaded microemulsion-based hydrogel for the treatment of osteoarthritis in a rabbit model. Drug Deliv Transl Res 2019; 9:357-365. [PMID: 30430453 DOI: 10.1007/s13346-018-00604-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aim of this study was to develop a microemulsion-based hydrogel (MBH) formulation of 3,5,4'-trimethoxy-trans-stilbene (BTM) as topical delivery system for the treatment of osteoarthritis (OA). The pseudo-ternary phase diagrams were constructed to optimize the microemulsion (ME) formulation. The ME formulation containing 18.8% Cremopher EL35 (surfactant), 9.4% Transcutol HP (co-surfactant), 3.1% LABRAFIL M 1944 CS (oil), and 68.7% water was selected. The obtained BTM-loaded ME (BTM-ME) had a spherical morphology (17.5 ± 1.4 nm), with polydispersity index (PDI) value of 0.068 ± 0.016 and zeta potential of - 11.8 ± 0.5 mV, and was converted into BTM-loaded MBH (BTM-MBH) using Carbopol 940. Ex vivo skin permeation study showed that both ME and MBH formulations significantly enhanced the amount of BTM permeated. The cumulative amount of BTM permeated after 12 h (Q12) for ME, and MBH formulations were 3.25- and 1.96-fold higher than that for emulsion gel (EG). Pharmacokinetic study showed that the AUC of BTM suspension (oral) was three times higher than that of BTM-MBH (topical). Topical delivery of BTM-MBH demonstrated remarkable anti-OA effect in a rabbit model of OA induced by papain, with decreased levels of pro-inflammatory cytokines. The developed MBH formulation might be a promising strategy for topical delivery of BTM for treatment of OA.
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Imaging the distribution of skin lipids and topically applied compounds in human skin using mass spectrometry. Sci Rep 2018; 8:16683. [PMID: 30420715 PMCID: PMC6232133 DOI: 10.1038/s41598-018-34286-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/10/2018] [Indexed: 12/18/2022] Open
Abstract
The barrier functions of skin against water loss, microbial invasion and penetration of xenobiotics rely, in part, on the spatial distribution of the biomolecular constituents in the skin structure, particularly its horny layer (stratum corneum). However, all skin layers are important to describe normal and dysfunctional skin conditions, and to develop adapted therapies or skin care products. In this work, time-of-flight secondary ion mass spectrometry (ToF-SIMS) combined with scanning electron microscopy (SEM) was used to image the spatial distribution of a variety of molecular species, from stratum corneum down to dermis, in cross-section samples of human abdominal skin. The results demonstrate the expected localization of ceramide and saturated long-chain fatty acids in stratum corneum (SC) and cholesterol sulfate in the upper part of the viable epidermis. The localization of exogenous compounds is demonstrated by the detection and imaging of carvacrol (a constituent of oregano or thyme essential oil) and ceramide, after topical application onto ex vivo human skin. Carvacrol showed pronounced accumulation to triglyceride-containing structures in the deeper parts of dermis. In contrast, the exogenous ceramide was found to be localized in SC. Furthermore, the complementary character of this approach with classical ex vivo skin absorption analysis methods is demonstrated.
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15
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Dermal peptide delivery using enhancer molecules and colloidal carrier systems. Part III: Tetrapeptide GEKG. Eur J Pharm Sci 2018; 124:137-144. [DOI: 10.1016/j.ejps.2018.08.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/07/2018] [Accepted: 08/24/2018] [Indexed: 11/21/2022]
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State of the art in Stratum Corneum research: The biophysical properties of ceramides. Chem Phys Lipids 2018; 216:91-103. [PMID: 30291856 DOI: 10.1016/j.chemphyslip.2018.09.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/10/2018] [Accepted: 09/29/2018] [Indexed: 11/20/2022]
Abstract
This review is summarizing an important part of the state of the art in stratum corneum research. A complete overview on discoveries about the general biophysical and physicochemical properties of the known ceramide species' is provided. The ceramides are one of the three major components of the lipid matrix and mainly govern its properties and structure. They are shown to exhibit very little redundancy, despite the minor differences in their chemical structure. The results are discussed, compared to each other as well as the current base of knowledge. New interesting aspects and concepts are concluded or suggested. A novel interpretation of the 3-dimensional structure of the lipid matrix and its influence on the barrier function will be discussed. The most important conclusion is the presentation of a new and up to date theoretical model of the nanostructure of the short periodicity phase. The model suggests three perpendicular layers: The rigid head group region, the rigid chain region and, a liquid-like overlapping middle layer. The general principle of the skin barrier function is highlighted in regard to this structure and the ceramides biophysical and physicochemical properties. As a result of these considerations, the entropy vs. enthalpy principle is introduced, shedding light on the function as well as the effectiveness of the skin barrier. Additionally, general ideas to effectively overcome this barrier principle for dermal and transdermal delivery of actives or how to use it for specific targeting of the stratum corneum are proposed.
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Tessema EN, Gebre-Mariam T, Frolov A, Wohlrab J, Neubert RHH. Development and validation of LC/APCI-MS method for the quantification of oat ceramides in skin permeation studies. Anal Bioanal Chem 2018; 410:4775-4785. [PMID: 29947900 DOI: 10.1007/s00216-018-1162-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 04/20/2018] [Accepted: 05/24/2018] [Indexed: 12/11/2022]
Abstract
Ceramides (CERs) are the backbone of the intercellular lipid lamellae of the stratum corneum (SC), the outer layer of the skin. Skin diseases such as atopic dermatitis, psoriasis, and aged skin are characterized by dysfunctional skin barrier and dryness which are associated with reduced levels of CERs. Replenishing the depleted epidermal CERs with exogenous CERs has been shown to have beneficial effects in improving the skin barrier and hydration. The exogenous CERs such as phyto-derived CERs (PhytoCERs) can be delivered deep into the SC using novel topical formulations. This, however, requires investigating the rate and extent of skin permeation of CERs. In this study, an LC/APCI-MS method to detect and quantify PhytoCERs in different layers of the skin has been developed and validated. The method was used to investigate the skin permeation of PhytoCERs using Franz diffusion cells after applying an amphiphilic cream containing PhytoCERs to the surface of ex vivo human skin. As plant-specific CERs are not commercially available, well-characterized CERs isolated from oat (Avena abyssinica) were used as reference standards for the development and validation of the method. The method was linear over the range of 30-1050 ng/mL and sensitive with limit of detection and quantification of 10 and 30 ng/mL, respectively. The method was also selective, accurate, and precise with minimal matrix effect (with mean matrix factor around 100%). Even if more than 85% of oat CERs in the cream remained in the cream after the incubation periods of 30, 100, and 300 min, it was possible to quantify the small quantities of oat CERs distributed across the SC, epidermis, and dermis of the skin indicating the method's sensitivity. Therefore, the method can be used to investigate the skin permeation of oat CERs from the various pharmaceutical and cosmeceutical products without any interference from the skin constituents such as the epidermal lipids. Graphical abstract ᅟ.
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Affiliation(s)
- Efrem N Tessema
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Tsige Gebre-Mariam
- Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle (Saale), Germany
| | - Johannes Wohlrab
- Department of Dermatology and Venereology, Medical Faculty, Martin Luther University Halle-Wittenberg, Ernst-Grube-Str. 40, 06120, Halle (Saale), Germany
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23, 06120, Halle (Saale), Germany
| | - Reinhard H H Neubert
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany.
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23, 06120, Halle (Saale), Germany.
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Delivery of oat-derived phytoceramides into the stratum corneum of the skin using nanocarriers: Formulation, characterization and in vitro and ex-vivo penetration studies. Eur J Pharm Biopharm 2018; 127:260-269. [DOI: 10.1016/j.ejpb.2018.02.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 02/27/2018] [Accepted: 02/27/2018] [Indexed: 01/02/2023]
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19
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Dermal peptide delivery using enhancer moleculs and colloidal carrier systems. Part II: Tetrapeptide PKEK. Eur J Pharm Biopharm 2018; 124:28-33. [DOI: 10.1016/j.ejpb.2017.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/11/2017] [Accepted: 12/13/2017] [Indexed: 01/12/2023]
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20
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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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21
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Tessema EN, Gebre-Mariam T, Neubert RHH, Wohlrab J. Potential Applications of Phyto-Derived Ceramides in Improving Epidermal Barrier Function. Skin Pharmacol Physiol 2017; 30:115-138. [PMID: 28407621 DOI: 10.1159/000464337] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 02/17/2017] [Indexed: 12/31/2022]
Abstract
The outer most layer of the skin, the stratum corneum, consists of corneocytes which are coated by a cornified envelope and embedded in a lipid matrix of ordered lamellar structure. It is responsible for the skin barrier function. Ceramides (CERs) are the backbone of the intercellular lipid membranes. Skin diseases such as atopic dermatitis and psoriasis and aged skin are characterized by dysfunctional skin barrier and dryness which are associated with reduced levels of CERs. Previously, the effectiveness of supplementation of synthetic and animal-based CERs in replenishing the depleted natural skin CERs and restoring the skin barrier function have been investigated. Recently, however, the barrier function improving effect of plant-derived CERs has attracted much attention. Phyto-derived CERs (phytoCERs) are preferable due to their assumed higher safety as they are mostly isolated from dietary sources. The beneficial effects of phytoCER-based oral dietary supplements for skin hydration and skin barrier reinforcement have been indicated in several studies involving animal models as well as human subjects. Ingestible dietary supplements containing phytoCERs are also widely available on the market. Nonetheless, little effort has been made to investigate the potential cosmetic applications of topically administered phytoCERs. Therefore, summarizing the foregoing investigations and identifying the gap in the scientific data on plant-derived CERs intended for skin-health benefits are of paramount importance. In this review, an attempt is made to synthesize the information available in the literature regarding the effects of phytoCER-based oral dietary supplements on skin hydration and barrier function with the underlying mechanisms.
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Affiliation(s)
- Efrem N Tessema
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
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22
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Cavalcanti AL, Reis MY, Silva GC, Ramalho ÍM, Guimarães GP, Silva JA, Saraiva KL, Damasceno BP. Microemulsion for topical application of pentoxifylline: In vitro release and in vivo evaluation. Int J Pharm 2016; 506:351-60. [DOI: 10.1016/j.ijpharm.2016.04.065] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 04/19/2016] [Accepted: 04/25/2016] [Indexed: 12/19/2022]
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23
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Neubert RHH, Sonnenberger S, Dobner B, Gray CW, Barger KN, Sevi-Maxwell K, Sommer E, Wohlrab J. Controlled Penetration of a Novel Dimeric Ceramide into and across the Stratum Corneum Using Microemulsions and Various Types of Semisolid Formulations. Skin Pharmacol Physiol 2016; 29:130-4. [PMID: 27193887 DOI: 10.1159/000445776] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 03/23/2016] [Indexed: 11/19/2022]
Abstract
Ceramides (CERs) are integral parts of the intercellular lipid lamellae of the stratum corneum (SC), which is responsible for the barrier function of the skin. Many skin diseases such as atopic dermatitis and psoriasis are associated with the depletion or disturbance of the level of CERs in the SC. Administration of an exogenous novel dimeric ceramide (dCER) deep into the SC may help to stabilize the SC barrier substantially and to treat some skin disease conditions. Consequently, with the help of the existing technology, it might be possible to formulate various pharmaceutical dosage forms that can facilitate penetration of dCER into the SC. Therefore, the penetration of dCER was studied using a high-performance liquid chromatography/atmospheric-pressure ionization/mass spectrometry method for the detection and quantification of exogenous dCER in the SC as well as other skin layers. Penetration studies were carried out in the Franz diffusion cell using excised human skin ex vivo. Penetration of dCER was studied with 3 model formulations: a colloidal formulation (microemulsion), a cream formulation with ethoxydiglycol as penetration enhancer and a nanoformulation. The highest concentrations of dCER in the different skin layers were found after application of the cream with penetration enhancer. Surprisingly, the lowest concentrations of dCER in the different skin layers were found after application of the microemulsion.
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Affiliation(s)
- Reinhard H H Neubert
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
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24
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Wan T, Xu T, Pan J, Qin M, Pan W, Zhang G, Wu Z, Wu C, Xu Y. Microemulsion based gel for topical dermal delivery of pseudolaric acid B: In vitro and in vivo evaluation. Int J Pharm 2015. [DOI: 10.1016/j.ijpharm.2015.07.058] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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25
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Grether-Beck S, Felsner I, Koehler T, Farwick M, Lersch P, Rawlings AV, Krutmann J. Topical ceramides neither enhance UVB-induced apoptosis in normal human keratinocytes nor affect viability in UVB-irradiated reconstructed human epidermis. Exp Dermatol 2015; 23:853-5. [PMID: 25078364 DOI: 10.1111/exd.12526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2014] [Indexed: 12/21/2022]
Abstract
Ceramides are the major lipid of lamellar sheets present in intercellular spaces of the stratum corneum contributing to epidermal barrier properties. Therefore, ceramides and their analogues have been studied for barrier enhancing and water-holding properties for decades. In vitro studies have indicated cytotoxic potential for cell-permeable ceramides thereby raising the question whether topical ceramide application might contribute to UVB-induced apoptosis. Phytosphingosine, N-hexanoyl-phytosphingosine and N-stearoylphytosphingosine (ceramide III) in concentrations ≤5 μm have been used for co-stimulation with low (160 J/m(2) ) or high (600 J/m(2) ) UVB doses in subconfluent basal and confluent differentiating keratinocytes. Significantly, increased caspase-3 activity was observed in basal keratinocytes irradiated with 600 J/m(2) UVB and in differentiating keratinocytes with both UVB doses. Co-stimulation with the named ceramides did not further increase (i) caspase-3 activity and (ii) nucleosomal fragmentation in differentiating keratinocytes. Moreover, co-stimulation with 1-mm ceramides did not further affect viability/lactate dehydrogenase release in UVB-irradiated reconstructed human epidermis corroborating the safety of these ceramides.
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Affiliation(s)
- Susanne Grether-Beck
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
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26
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Zhang Q, Flach CR, Mendelsohn R, Mao G, Pappas A, Mack MC, Walters RM, Southall MD. Topically applied ceramide accumulates in skin glyphs. Clin Cosmet Investig Dermatol 2015; 8:329-37. [PMID: 26170709 PMCID: PMC4493983 DOI: 10.2147/ccid.s83857] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Ceramides (CERs), structural components of the stratum corneum (SC), impart essential barrier properties to this thin outer layer of the epidermis. Variations in CER species within this layer have been linked to several skin diseases. A recent proliferation of CER-containing topical skin-care products warrants the elucidation of CER penetration profiles in both healthy and diseased skin. In the current study, the spatial distributions of CER concentration profiles, following topical application of two species of CER, were tracked using infrared imaging. Suspensions of single-chain perdeuterated sphingosine and phytosphingosine CER in oleic acid were applied, in separate experiments, to the surface of healthy intact ex vivo human skin using Franz diffusion cells. Following either a 24- or 48-hour incubation period at 34°C, infrared images were acquired from microtomed skin sections. Both CER species accumulated in glyph regions of the skin and penetrated into the SC, to a limited extent, only in these regions. The concentration profiles observed herein were independent of the CER species and incubation time utilized in the study. As a result, a very heterogeneous, sparse, spatial distribution of CERs in the SC was revealed. In contrast, oleic acid was found to be fairly homogeneously distributed throughout the SC and viable epidermis, albeit at lower concentrations in the latter. A more uniform, lateral distribution of CERs in the SC would likely be important for barrier efficacy or enhancement.
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Affiliation(s)
- Qihong Zhang
- Department of Chemistry, Rutgers University, Newark, NJ, USA
| | - Carol R Flach
- Department of Chemistry, Rutgers University, Newark, NJ, USA
| | | | - Guangru Mao
- Johnson & Johnson Consumer Companies, Inc., Skillman, NJ, USA
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27
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In vitro skin models as a tool in optimization of drug formulation. Eur J Pharm Sci 2015; 75:10-24. [PMID: 25746955 DOI: 10.1016/j.ejps.2015.02.018] [Citation(s) in RCA: 135] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/22/2015] [Accepted: 02/23/2015] [Indexed: 11/21/2022]
Abstract
(Trans)dermal drug therapy is gaining increasing importance in the modern drug development. To fully utilize the potential of this route, it is important to optimize the delivery of active ingredient/drug into/through the skin. The optimal carrier/vehicle can enhance the desired outcome of the therapy therefore the optimization of skin formulations is often included in the early stages of the product development. A rational approach in designing and optimizing skin formulations requires well-defined skin models, able to identify and evaluate the intrinsic properties of the formulation. Most of the current optimization relies on the use of suitable ex vivo animal/human models. However, increasing restrictions in use and handling of animals and human skin stimulated the search for suitable artificial skin models. This review attempts to provide an unbiased overview of the most commonly used models, with emphasis on their limitations and advantages. The choice of the most applicable in vitro model for the particular purpose should be based on the interplay between the availability, easiness of the use, cost and the respective limitations.
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28
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Ma H, Yu M, Tan F, Li N. Improved percutaneous delivery of azelaic acid employing microemulsion as nanocarrier: formulation optimization, in vitro and in vivo evaluation. RSC Adv 2015. [DOI: 10.1039/c5ra00713e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Topical administration of an optimal microemulsion could effectively enhance the amount of azelaic acid in skin without causing skin irritation.
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Affiliation(s)
- Huixian Ma
- Tianjin Key Laboratory of Drug Delivery and High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- 300072 Tianjin
- P. R. China
| | - Meng Yu
- Tianjin Key Laboratory of Drug Delivery and High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- 300072 Tianjin
- P. R. China
| | - Fengping Tan
- Tianjin Key Laboratory of Drug Delivery and High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- 300072 Tianjin
- P. R. China
| | - Nan Li
- Tianjin Key Laboratory of Drug Delivery and High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- 300072 Tianjin
- P. R. China
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29
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Comparison of rheological properties, follicular penetration, drug release, and permeation behavior of a novel topical drug delivery system and a conventional cream. Eur J Pharm Biopharm 2014; 88:614-24. [DOI: 10.1016/j.ejpb.2014.10.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 10/06/2014] [Accepted: 10/08/2014] [Indexed: 01/04/2023]
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30
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Sahle FF, Gebre-Mariam T, Dobner B, Wohlrab J, Neubert RHH. Skin diseases associated with the depletion of stratum corneum lipids and stratum corneum lipid substitution therapy. Skin Pharmacol Physiol 2014; 28:42-55. [PMID: 25196193 DOI: 10.1159/000360009] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 01/27/2014] [Indexed: 11/19/2022]
Abstract
The skin is the largest organ of the body, whose main function is to protect the body against the loss of physiologically important components as well as harmful environmental insults. From the inside to the outside, the skin comprises three major structural layers: the hypodermis, the dermis and the epidermis. The epidermis contains four different sublayers, the stratum corneum (SC), stratum granulosum, stratum spinosum and stratum basale, where the barrier function of the skin mainly lies in the outermost layer of the epidermis, the SC. The SC contains corneocytes that are embedded in a lipid matrix existing in the form of lipid bilayers. The lipid bilayers are formed mainly from ceramides, free fatty acids and cholesterol, constitute the only continuous pathway across the SC and are responsible for the barrier function of the skin. However, the depletion or disturbance of SC lipids in the SC leads to a perturbation of the barrier function of the skin, and, conversely, several skin diseases such as psoriasis and atopic dermatitis are associated with the depletion of these SC lipids. Therefore, it is of paramount importance to understand the interrelationship between the depletion of SC lipids and skin diseases as well as factors that affect the composition and organization of SC lipids in order to assess the potential benefit of a direct replacement of the missing SC lipids as a means of treating affected, aged or diseased skin.
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Affiliation(s)
- Fitsum F Sahle
- Department of Pharmaceutical Technology and Biopharmaceutics, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
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31
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Lopes LB. Overcoming the cutaneous barrier with microemulsions. Pharmaceutics 2014; 6:52-77. [PMID: 24590260 PMCID: PMC3978525 DOI: 10.3390/pharmaceutics6010052] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/24/2014] [Accepted: 02/11/2014] [Indexed: 11/16/2022] Open
Abstract
Microemulsions are fluid and isotropic formulations that have been widely studied as delivery systems for a variety of routes, including the skin. In spite of what the name suggests, microemulsions are nanocarriers, and their use as topical delivery systems derives from their multiple advantages compared to other dermatological formulations, such as ease of preparation, thermodynamic stability and penetration-enhancing properties. Composition, charge and internal structure have been reported as determinant factors for the modulation of drug release and cutaneous and transdermal transport. This manuscript aims at reviewing how these and other characteristics affect delivery and make microemulsions appealing for topical and transdermal administration, as well as how they can be modulated during the formulation design to improve the potential and efficacy of the final system.
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Affiliation(s)
- Luciana B Lopes
- Institute of Biomedical Science, University of São Paulo, São Paulo 05508, SP, Brazil.
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32
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Qu D, He J, Liu C, Zhou J, Chen Y. Triterpene-loaded microemulsion using Coix lacryma-jobi seed extract as oil phase for enhanced antitumor efficacy: preparation and in vivo evaluation. Int J Nanomedicine 2013; 9:109-19. [PMID: 24379669 PMCID: PMC3872217 DOI: 10.2147/ijn.s54796] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Ganoderma lucidum triterpene-loaded microemulsions (TMEs) using Coix lacryma-jobi (adlay) seed oil as oil phase were prepared, characterized, and evaluated for enhanced antitumor activity. Ternary phase diagrams for the TMEs were constructed and the optimal preparation was developed. Transmission electron microscopy and dynamic light scattering showed that this formulation had a well defined spherical shape, a homogeneous distribution, a small size, and a narrow polydispersity index. The drug-loading rate was determined to be 9.87% by ultraviolet spectrophotometry, and acceptable stability under various stimulations in vitro was confirmed. Importantly, the TME formulation showed a significantly greater antiproliferative effect towards human lung carcinoma (A549) cells and murine lung tumor (Lewis) cells in comparison with suspension formulations containing triterpene and adlay seed oil as a positive control. The half-maximal inhibitory concentration of the TMEs was about 0.62 mg crude drug per mL, being 2.5-fold improved relative to that of the corresponding suspension formulation, but no significant cytotoxicity was observed for the bare microemulsion in A549 cells and Lewis cells. In vivo, the TME formulation showed markedly enhanced antitumor efficacy in a xenograft model of Lewis lung cancer after intragastric administration. Compared with cyclophosphamide, the TME formulation showed similar antitumor activity but less general toxicity. These results indicate the feasibility of using a microemulsion to increase the solubility of triterpene and adlay. TMEs hold promise as an efficient drug delivery system for the treatment of lung cancer.
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Affiliation(s)
- Ding Qu
- Key Laboratory of New Drug Delivery System of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, People's Republic of China
| | - Junjie He
- Key Laboratory of New Drug Delivery System of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, People's Republic of China
| | - Congyan Liu
- Key Laboratory of New Drug Delivery System of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, People's Republic of China
| | - Jing Zhou
- Key Laboratory of New Drug Delivery System of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, People's Republic of China
| | - Yan Chen
- Key Laboratory of New Drug Delivery System of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, People's Republic of China
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