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Railic M, Crean AM, Vucen S. Unravelling Microarray Patch Performance: The Role of In Vitro Release Medium and Biorelevant Testing. Mol Pharm 2024. [PMID: 39195905 DOI: 10.1021/acs.molpharmaceut.4c00459] [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: 08/29/2024]
Abstract
The absence of established protocols for studying the in vitro performance of dissolvable microarray patches (MAPs) poses a significant challenge within the field. To overcome this challenge, it is essential to optimize testing methods in a way that closely mimics the skin's environment, ensuring biorelevance and enhancing the precision of assessing MAP performance. This study focuses on optimizing in vitro release testing (IVRT) and in vitro permeation testing (IVPT) methods for MAPs containing the antihistamine drugs loratadine (LOR) and chlorpheniramine maleate (CPM). Our primary objective is to investigate the impact of the composition of in vitro release media on the drug release rate, penetration through the skin, and permeation into the release medium. Artificial interstitial fluid is introduced as a biorelevant release medium and compared with commonly used media in IVRT and IVPT studies. Prior to these studies, we evaluated drug solubility in different release media and developed a method for LOR and CPM extraction from the skin using a design of experiment approach. Our findings highlight the effect of the in vitro release medium composition on both LOR and CPM release rate and their penetration through the skin. Furthermore, we identified the importance of considering the interplay between the physicochemical attributes of the drug molecules, the design of the MAP formulation, and the structural properties of the skin when designing IVRT and IVPT protocols.
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Affiliation(s)
- Maja Railic
- SSPC, the SFI Research Centre for Pharmaceuticals, School of Pharmacy, University College Cork, College Road, Cork T12 K8AF, Ireland
| | - Abina M Crean
- SSPC, the SFI Research Centre for Pharmaceuticals, School of Pharmacy, University College Cork, College Road, Cork T12 K8AF, Ireland
| | - Sonja Vucen
- SSPC, the SFI Research Centre for Pharmaceuticals, School of Pharmacy, University College Cork, College Road, Cork T12 K8AF, Ireland
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Mojsiewicz-Pieńkowska K, Bazar D, Filipecki J, Chamerski K. Investigating the Free Volumes as Nanospaces in Human Stratum Corneum Lipid Bilayers Using Positron Annihilation Lifetime Spectroscopy (PALS). Int J Mol Sci 2024; 25:6472. [PMID: 38928177 PMCID: PMC11203785 DOI: 10.3390/ijms25126472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/06/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
This work is the first one that provides not only evidence for the existence of free volumes in the human stratum corneum but also focuses on comparing these experimental data, obtained through the unique positron annihilation lifetime spectroscopy (PALS) method, with theoretical values published in earlier works. The mean free volume of 0.269 nm was slightly lower than the theoretical value of 0.4 nm. The lifetime τ3 (1.83 ns with a coefficient of variation CV of 3.21%) is dependent on the size of open sites in the skin. This information was used to calculate the free volume radius R (0.269 nm with CV 2.14%), free volume size Vf (0.081 nm3 with CV 4.69%), and the intensity I3 (9.01% with CV 10.94%) to estimate the relative fractional free volume fv (1.32 a.u. with CV 13.68%) in human skin ex vivo. The relation between the lifetime of o-Ps (τ3) and the radius of free volume (R) was formulated using the Tao-Eldrup model, which assumes spherical voids and applies to sites with radii smaller than 1 nm. The results indicate that PALS is a powerful tool for confirming the existence of free volumes and determining their size. The studies also focused on describing the probable locations of these nanospaces in SC lipid bilayers. According to the theory, these play an essential role in dynamic processes in biological systems, including the diffusion of low-molecular-weight hydrophobic and moderately hydrophilic molecules. The mechanism of their formation has been determined by the molecular dynamics of the lipid chains.
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Affiliation(s)
- Krystyna Mojsiewicz-Pieńkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland;
| | - Dagmara Bazar
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland;
| | - Jacek Filipecki
- Institute of Physics, Faculty of Science & Technology, Jan Dlugosz University in Częstochowa, Armii Krajowej 13/15, 42-200 Częstochowa, Poland; (J.F.); (K.C.)
| | - Kordian Chamerski
- Institute of Physics, Faculty of Science & Technology, Jan Dlugosz University in Częstochowa, Armii Krajowej 13/15, 42-200 Częstochowa, Poland; (J.F.); (K.C.)
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Lehman PA, Franz TJ. Observations on the Tritiated Water and TEWL Skin Integrity Tests: Relevance to In Vitro Permeation Testing (IVPT). Pharm Res 2024; 41:1149-1161. [PMID: 38720033 DOI: 10.1007/s11095-024-03707-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/21/2024] [Indexed: 06/26/2024]
Abstract
BACKGROUND The in vitro permeation test (IVPT) using ex vivo human skin is a sensitive and robust model system that has been vital in elucidating the fundamental parameters surrounding the absorption of both therapeutic agents and industrial chemicals through skin. FDA and OECD IVPT Guidances recommend that each skin section selected for study should be screened prior to use to ensure that the stratum corneum integrity is retained. Three methods are currently considered acceptable: 1) transepidermal water loss (TEWL), 2) electrical resistance, and 3) tritiated water (3H2O) absorption. METHODS A retrospective analysis of data from the authors' laboratory has been performed with the objective of addressing a number of questions regarding the 3H2O and TEWL integrity tests, and the population attributes of a large database consisting of 17,330 individual skin sections obtained from 459 skin donors. The applicability and usefulness of these tests, when compared to companion permeation data obtained from 25 topical drug products, has also been examined. RESULTS Both integrity tests found water permeability to be equal in White and Hispanic races but higher than in Blacks, 3H2O being more discriminating than TEWL. Male skin is more permeable than female and there is a slight decrease in permeability with advancing age in both groups. Correlation between 3H2O absorption and drug absorption revealed a minimal relationship between the two in most cases, the Pearson correlation coefficient ranging from -0.417 to 0.953. Additionally, drug outliers were not always identified with a failing integrity test. CONCLUSION The results call for a critical reexamination of the value of the 3H2O integrity test, and by extension, TEWL, for use in IVPT studies.
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Ragnarsdóttir O, Abou-Elwafa Abdallah M, Harrad S. Dermal bioavailability of perfluoroalkyl substances using in vitro 3D human skin equivalent models. ENVIRONMENT INTERNATIONAL 2024; 188:108772. [PMID: 38810496 DOI: 10.1016/j.envint.2024.108772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 05/03/2024] [Accepted: 05/21/2024] [Indexed: 05/31/2024]
Abstract
Perfluoroalkyl substances (PFAS) have been identified in various products that come in contact with human skin, ranging from school uniforms to personal care products. Despite this, knowledge on human dermal uptake of PFAS is lacking. Thus, the human dermal absorption of 17 PFAS was assessed, for the first time, using in vitro 3D-human skin equivalent models exposed to 500 ng/cm2 PFAS dissolved in methanol over 24-36 h. The distribution of target PFAS is presented, based on three fractions: absorbed, un-absorbed, and retained within skin tissue (absorbable dose). Perfluoropentanoic acid (PFPeA) and perfluorobutane sulfonate (PFBS) had the highest absorbed fraction, 58.9 % and 48.7 % respectively, with the absorbed fraction decreasing with increasing carbon chain length of the studied perfluorocarboxylic acids (PFCAs) (r = 0.97, p = 0.001) and perfluorosulfonic acids (PFSAs) (r = 0.97, p = 0.004). Interestingly, while longer chain PFAS (Cn ≥ 9) were not directly absorbed, a large fraction of the exposure dose was detected within the skin tissue at the end of the exposure. This was most apparent for perfluoroundecanoic acid (PFUnDA) and perfluorononane sulfonate (PFNS) for which 66.5 % and 68.3 % of the exposure dose was found within the skin tissue, while neither compound was detected in the absorbed fraction. For compounds with a carbon chain length > 11, the fraction found within the skin tissue, decreases with increasing chain length. Physicochemical properties played a role in dermal permeation of PFAS, with a clear inverse correlation between logKOW and absorbed fraction for both PFCAs (r = -0.97; p ≤ 0.001) and PFSAs (r = -0.99; p ≤ 0.001). Steady-state flux (JSS) and permeation coefficients (Papp) were determined for target compounds with significant permeation after 36 h exposure (C5-C8 PFCAs and C4-C7 PFSAs). In general, both the flux and permeation coefficient decreased with increasing chain length.
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Affiliation(s)
- Oddný Ragnarsdóttir
- School of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK.
| | | | - Stuart Harrad
- School of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK
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Ahmad S, d'Avanzo N, Mancuso A, Barone A, Cristiano MC, Carresi C, Mollace V, Celia C, Fresta M, Paolino D. Skin Tolerability of Oleic Acid Based Nanovesicles Designed for the Improvement of Icariin and Naproxen Percutaneous Permeation. ACS APPLIED BIO MATERIALS 2024. [PMID: 38608313 DOI: 10.1021/acsabm.4c00067] [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: 04/14/2024]
Abstract
Deformable nanovesicles have a crucial role in topical drug delivery through the skin, due to their capability to pass intact the stratum corneum and epidermis (SCE) and significantly increase the efficacy and accumulation of payloads in the deeper layers of the skin. Namely, lipid-based ultradeformable nanovesicles are versatile and load bioactive molecules with different physicochemical properties. For this reason, this study aims to make oleic acid based nanovesicles (oleosomes) for the codelivery of icariin and sodium naproxen and increase their permeation through the skin. Oleosomes have suitable physicochemical properties and long-term stability for a potential dermal or transdermal application. The inclusion of oleic acid in the lipid bilayer increases 3-fold the deformable properties of oleosomes compared to conventional liposomes and significantly improves the percutaneous permeation of icariin and sodium naproxen through the human SCE membranes compared to hydroalcoholic solutions of both drugs. The tolerability studies on human volunteers demonstrate that oleosomes are safer and speed up the recovery of transepidermal water loss (TEWL) baselines compared to saline solution. These results highlight promising properties of icariin/sodium naproxen coloaded oleosomes for the treatment of skin disorders and suggest the potential future applications of these nanovesicles for further in vivo experiments.
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Affiliation(s)
- Shabir Ahmad
- Department of Health Sciences, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100 Catanzaro, Italy
| | - Nicola d'Avanzo
- Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100, Catanzaro, Italy
- Research Center "ProHealth Translational Hub", Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Campus Universitario "S. Venuta", Building of BioSciences, Viale S. Venuta, 88100 Catanzaro, Italy
| | - Antonia Mancuso
- Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100, Catanzaro, Italy
- Research Center "ProHealth Translational Hub", Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Campus Universitario "S. Venuta", Building of BioSciences, Viale S. Venuta, 88100 Catanzaro, Italy
| | - Antonella Barone
- Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100, Catanzaro, Italy
| | - Maria Chiara Cristiano
- Department of Medical and Surgical Sciences, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100 Catanzaro, Italy
| | - Cristina Carresi
- Institute of Research for Food Safety and Health IRC-FSH, Department of Health Sciences, University of Catanzaro "Magna Graecia", 88100 Catanzaro, Italy
| | - Vincenzo Mollace
- Institute of Research for Food Safety and Health IRC-FSH, Department of Health Sciences, University of Catanzaro "Magna Graecia", 88100 Catanzaro, Italy
- Renato Dulbecco Institute, Lamezia Terme, 88046 Catanzaro, Italy
| | - Christian Celia
- Department of Pharmacy, University of Chieti-Pescara "G. d'Annunzio", Via dei Vestini 31, 66100 Chieti, Italy
- Laboratory of Drug Targets Histopathology, Institute of Cardiology, Lithuanian University of Health Sciences, A. Mickeviciaus g. 9, LT-44307 Kaunas, Lithuania
- Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
- UdA-TechLab, Research Center, University of Chieti-Pescara "G. d'Annunzio", Via dei Vestini 31, 66100 Chieti, Italy
| | - Massimo Fresta
- Department of Health Sciences, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100 Catanzaro, Italy
| | - Donatella Paolino
- Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Viale "S. Venuta", 88100, Catanzaro, Italy
- Research Center "ProHealth Translational Hub", Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Campus Universitario "S. Venuta", Building of BioSciences, Viale S. Venuta, 88100 Catanzaro, Italy
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Singh N, Shaikh AM, Gupta P, Kovács B, Abuzinadah MF, Ahmad A, Goel R, Singh S, Vinayak C. Nanophytosomal Gel of Heydotis corymbosa (L.) Extract against Psoriasis: Characterisation, In Vitro and In Vivo Biological Activity. Pharmaceuticals (Basel) 2024; 17:213. [PMID: 38399427 PMCID: PMC10893228 DOI: 10.3390/ph17020213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/27/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
The current study was conducted to examine the possible advantages of Heydotis corymbosa (L.) Lam. extract nanogel as a perspective for enhanced permeation and extended skin deposition in psoriasis-like dermatitis. Optimised nanophytosomes (NPs) were embedded in a pluronic gel base to obtain nanogel and tested ex vivo (skin penetration and dermatokinetics) and in vivo. The optimised NPs had a spherical form and entrapment efficiency of 73.05 ± 1.45% with a nanosized and zeta potential of 86.11 nm and -10.40 mV, respectively. Structural evaluations confirmed encapsulation of the drug in the NPs. Topical administration of prepared nanogel to a rat model of psoriasis-like dermatitis revealed its specific in vivo anti-psoriatic efficacy in terms of drug activity compared to the control and other formulations. Nanogel had improved skin integrity and downregulation of inflammatory cytokines. These findings suggest that developed phytoconstituent-based nanogel has the potential to alleviate psoriasis-like dermatitis with better skin retention and effectiveness.
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Affiliation(s)
- Neelam Singh
- ITS College of Pharmacy, Ghaziabad 201206, Uttar Pradesh, India; (N.S.)
| | - Ayaz Mukarram Shaikh
- Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Food Science, University of Debrecen, 4032 Debrecen, Hungary; (A.M.S.); (B.K.)
| | - Puneet Gupta
- Centre for Pharmaceutical Chemistry and Analysis, Amity Institute of Pharmacy, Amity University Uttar Pradesh, Sector 125, Noida 201313, UP, India
| | - Béla Kovács
- Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Food Science, University of Debrecen, 4032 Debrecen, Hungary; (A.M.S.); (B.K.)
| | - Mohammed F. Abuzinadah
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Aftab Ahmad
- Health Information Technology Department, The Applied College, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Pharmacovigilance and Medication Safety Unit, Centre of Research Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Radha Goel
- Lloyd Institutes of Management and Technology, Plot No.-11, Knowledge Park-II, Greater Noida 201306, UP, India;
| | - Swapnil Singh
- ITS College of Pharmacy, Ghaziabad 201206, Uttar Pradesh, India; (N.S.)
| | - Chaitanya Vinayak
- ITS College of Pharmacy, Ghaziabad 201206, Uttar Pradesh, India; (N.S.)
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Magnano GC, Marussi G, Crosera M, Hasa D, Adami G, Lionetti N, Larese Filon F. Probing the effectiveness of barrier creams against human skin penetration of nickel powder. Int J Cosmet Sci 2024; 46:39-50. [PMID: 37565324 DOI: 10.1111/ics.12893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/01/2023] [Accepted: 08/06/2023] [Indexed: 08/12/2023]
Abstract
OBJECTIVE Barrier creams (BCs) are marketed as locally applied medical devices or cosmetic products to protect the skin from exposure to chemicals and irritants. Generally, the mechanism of action of such products is mainly due to the formation of a superficial thin film between the skin and the irritant or sensitizer, thus reducing or totally blocking the cutaneous penetration of such agents. Specifically, studies focusing on the effectiveness of commercial protective creams to prevent nickel cutaneous penetration are extremely scarce. The aim of the current work, therefore, is to evaluate the protective role of a commercially available barrier cream for nickel and compare the results with a simple moisturizing, following exposure to Ni powder. METHODS Marketed BCs were evaluated and tested. Human skin absorption of Ni was studied in vitro using static Franz diffusion cells. RESULTS Our results demonstrate that the application of both formulations caused a reduction of Ni inside the skin (8.00 ± 3.35 μg cm-2 for the barrier cream and 22.6 ± 12.6 μg cm-2 for the general moisturizing product), with the specialized barrier cream being statistically (p = 0.015) more efficient on forming a protective barrier, thus evidencing the importance of some ingredients in such formulations on the nickel dermal accumulation. CONCLUSIONS The composition of the formulations based on film-forming or chelating agents may play an imperative role in reducing the cutaneous penetration of Ni.
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Affiliation(s)
- Greta Camilla Magnano
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
- Clinical Unit of Occupational Medicine, University of Trieste, Trieste, Italy
| | - Giovanna Marussi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Matteo Crosera
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Dritan Hasa
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Gianpiero Adami
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
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Magnano GC, Quadri M, Palazzo E, Lotti R, Loschi F, Dall'Acqua S, Abrami M, Larese Filon F, Marconi A, Hasa D. 3D human foreskin model for testing topical formulations of sildenafil citrate. Int J Pharm 2024; 649:123612. [PMID: 37992980 DOI: 10.1016/j.ijpharm.2023.123612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 10/29/2023] [Accepted: 11/14/2023] [Indexed: 11/24/2023]
Abstract
Sildenafil citrate is an approved drug used for the treatment of erectile dysfunction and premature ejaculation. Despite a widespread application, sildenafil citrate shows numerous adverse cardiovascular effects in high-risk patients. Local transdermal drug delivery of this drug is therefore being explored as an interesting and noninvasive alternative administration method that avoids adverse effects arised from peak plasma drug concentrations. Although human and animal skin represents the most reliable models to perform penetration studies, they involve a series of ethical issues and restrictions. For these reasons new in vitro approaches based on artificially reconstructed human skin or "human skin equivalents" are being developed as possible alternatives for transdermal testing. There is little information, however, on the efficiency of such new in vitro methods on cutaneous penetration of active ingredients. The objective of the current study was to investigate the sildenafil citrate loaded in three commercial transdermal vehicles using 3D full-thickness skin equivalent and compare the results with the permeability experiments using porcine skin. Our results demonstrated that, while the formulation plays an imperative role in an appropriate dermal uptake of sildenafil citrate, the D coefficient results obtained by using the 3D skin equivalent are comparable to those obtained by using the porcine skin when a simple drug suspension is applied (1.17 × 10-10 ± 0.92 × 10-10 cm2/s vs 3.5 × 102 ± 3.3 × 102 cm2/s), suggesting that in such case, this 3D skin model can be a valid alternative for ex-vivo skin absorption experiments.
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Affiliation(s)
- Greta Camilla Magnano
- Clinical Unit of Occupational Medicine, University of Trieste, Italy; Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy.
| | - Marika Quadri
- DermoLAB, Department of Surgical, Medical, Dental and Morphological Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Elisabetta Palazzo
- DermoLAB, Department of Surgical, Medical, Dental and Morphological Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Roberta Lotti
- DermoLAB, Department of Surgical, Medical, Dental and Morphological Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Francesca Loschi
- Department of Pharmaceutical Science and Pharmacology, University of Padova, Italy
| | - Stefano Dall'Acqua
- Department of Pharmaceutical Science and Pharmacology, University of Padova, Italy
| | - Michela Abrami
- Department of Engineering and Architecture, University of Trieste, Italy
| | | | - Alessandra Marconi
- DermoLAB, Department of Surgical, Medical, Dental and Morphological Science, University of Modena and Reggio Emilia, Modena, Italy.
| | - Dritan Hasa
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy.
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Singh N, Yadav SD, Gupta P, Ali F, Arora S. Dermal Delivery of Hypericum perforatum (L.) Loaded Nanogel: Formulation to Preclinical Psoriasis Assessment. RECENT ADVANCES IN DRUG DELIVERY AND FORMULATION 2024; 18:138-154. [PMID: 38808393 DOI: 10.2174/0126673878288239240415041832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/06/2024] [Accepted: 02/19/2024] [Indexed: 05/30/2024]
Abstract
BACKGROUND Nanophytosomes represent an effective choice for topical drug delivery systems thanks to their small size, general non-toxicity, ease of functionalization and high surface to volume ratio. The goal of the current study was to investigate the potential benefits of using Hypericum perforatum extract nanogel as a means of improving skin penetration and prolonging skin deposition in dermatitis similar to psoriasis. METHODS Nanophytosomes (NPs) were developed, optimised and thoroughly characterised. The optimised NPs were then placed in a Carbopol gel base matrix and tested ex-vivo (skin penetration and dermatokinetic) and in-vivo (antipsoriatic activity in an Imiquimod-induced psoriatic rat model). RESULTS The optimised NPs had a spherical form and entrapment efficiency of 69.68% with a nanosized and zeta potential of 168 nm and -10.37mV, respectively. XRD spectra and transmission electron microscopy tests confirmed the plant botanical encapsulation in the NPs. Following 60 days of storage at 40 ± 2°C/75 ± 5% RH, the optimised formula remained relatively stable. As compared to extract gel, nano-gel showed a much-improved ex vivo permeability profile and considerable drug deposition in the viable epidermal-dermal layers. When developed nano-gel was applied topically to a rat model of psoriasis, it demonstrated distinct in vivo anti-psoriatic efficacy in terms of drug activity and reduction of epidermal thickness in comparison to other formulations and the control. ELISA and histopathologic studies also demonstrated that nano-organogel had improved skin integrity and downregulated inflammatory markers (IL-17, IL-6, IFN-γ and MCP-1). CONCLUSION Findings suggest that a developed plant botanicals-based nanogel has a potential for the treatment of psoriasis-like dermatitis with better skin retention and effectiveness.
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Affiliation(s)
- Neelam Singh
- Department of Pharmacy, I.T.S. College of Pharmacy, Delhi-Meerut Road, Ghaziabad -201206, India
| | - Shubh Deep Yadav
- Department of Pharmacy, I.T.S. College of Pharmacy, Delhi-Meerut Road, Ghaziabad -201206, India
| | - Puneet Gupta
- Department of Pharmacy, Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Sector 125, Noida-201313, India
| | - Faraat Ali
- Department of Regulatory, Botswana Medicines Regulatory Authority, Plot 112, Gaborone International Finance Park Gaborone, Botswana
| | - Sandeep Arora
- Department of Pharmacy, Amity Institute of Pharmacy, Amity University, Uttar Pradesh, Sector 125, Noida-201313, India
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Özdemir S, Üner B, Karaküçük A, Çelik B, Sümer E, Taş Ç. Nanoemulsions as a Promising Carrier for Topical Delivery of Etodolac: Formulation Development and Characterization. Pharmaceutics 2023; 15:2510. [PMID: 37896270 PMCID: PMC10610052 DOI: 10.3390/pharmaceutics15102510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/16/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023] Open
Abstract
This research primarily focuses on the development of innovative topical nanoemulsions for etodolac, aimed at surmounting its inherent limitations. The preparation of etodolac nanoemulsions is accomplished through a combination of high shear homogenization and ultrasonication methods. The optimization of the formulation components is systematically conducted using the design of experiments methodology. The droplet size (DS), polydispersity index (PDI), and zeta potential (ZP) of the optimized formulation were assessed using the differential light scattering (DLS) technique. Surface morphology examinations were conducted using electron microscopy, while interactions between excipients and the drug were analyzed through FTIR analysis. Additionally, in vitro release and ex vivo permeability studies were carried out. Furthermore, anti-inflammatory activity was evaluated in the context of a carrageenan-induced paw edema model in rats. The DS, PDI, and ZP of the optimal formulation were 163.5 nm, 0.141, and -33.1 mV, respectively. The in vitro release profile was assessed as a sustained release by following a non-Fickian drug transport. The flux of etodolac nanoemulsions and coarse dispersions were 165.7 ± 11.7 µg/cm2 h and 59.7 ± 15.2 µg/cm2 h, respectively. Enhanced edema inhibition was observed at 13.4%, 36.5%, and 50.65% for the 6th, 8th, and 24th hours, respectively. Taken together, these results confirmed that nanoemulsions are promising carriers for the topical delivery of etodolac.
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Affiliation(s)
- Samet Özdemir
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul Health and Technology University, 34445 Istanbul, Turkey
| | - Burcu Üner
- Department of Administrative and Pharmaceutical Sciences, University of Health Science and Pharmacy in St. Louis, St. Louis, MO 63110, USA;
| | - Alptuğ Karaküçük
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ankara Medipol University, 06050 Ankara, Turkey;
| | - Burak Çelik
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Bezmialem Vakif University, 34093 Istanbul, Turkey;
| | - Engin Sümer
- Experimental Research Center (YUDETAM), Faculty of Medicine, Yeditepe University, 34755 Istanbul, Turkey;
| | - Çetin Taş
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Yeditepe University, 34755 Istanbul, Turkey;
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Ebrahimnejad P, Rezaeiroshan A, Babaei A, Khanali A, Aghajanshakeri S, Farmoudeh A, Nokhodchi A. Hyaluronic Acid-Coated Chitosan/Gelatin Nanoparticles as a New Strategy for Topical Delivery of Metformin in Melanoma. BIOMED RESEARCH INTERNATIONAL 2023; 2023:3304105. [PMID: 37313551 PMCID: PMC10260318 DOI: 10.1155/2023/3304105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 04/14/2023] [Accepted: 05/22/2023] [Indexed: 06/15/2023]
Abstract
Metformin is a multipotential compound for treating diabetes II and controlling hormonal acne and skin cancer. This study was designed to enhance metformin skin penetration in melanoma using nanoparticles containing biocompatible polymers. Formulations with various concentrations of chitosan, hyaluronic acid, and sodium tripolyphosphate were fabricated using an ionic gelation technique tailored by the Box-Behnken design. The optimal formulation was selected based on the smallest particle size and the highest entrapment efficiency (EE%) and used in ex vivo skin penetration study. In vitro antiproliferation activity and apoptotic effects of formulations were evaluated using MTT and flow cytometric assays, respectively. The optimized formulation had an average size, zeta potential, EE%, and polydispersity index of 329 ± 6.30 nm, 21.94 ± 0.05 mV, 64.71 ± 6.12%, and 0.272 ± 0.010, respectively. The release profile of the optimized formulation displayed a biphasic trend, characterized by an early burst release, continued by a slow and sustained release compared to free metformin. The ex vivo skin absorption exhibited 1142.5 ± 156.3 μg/cm2 of metformin deposited in the skin layers for the optimized formulation compared to 603.2 ± 93.1 μg/cm2 for the free metformin. Differential scanning calorimetry confirmed the deformation of the drug from the crystal structure to an amorphous state. The attenuated total reflection Fourier transform infrared results approved no chemical interaction between the drug and other ingredients of the formulations. According to the MTT assay, metformin in nanoformulation exhibited a higher cytotoxic effect against melanoma cancer cells than free metformin (IC50: 3.94 ± 0.57 mM vs. 7.63 ± 0.26 mM, respectively, P < 0.001). The results proved that the optimized formulation of metformin could efficiently decrease cell proliferation by promoting apoptosis, thus providing a promising strategy for melanoma therapy.
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Affiliation(s)
- Pedram Ebrahimnejad
- Department of Pharmaceutics, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
- Pharmaceutical Sciences Research Center, Hemoglobinopathy Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | | | - Amirhossein Babaei
- Department of Pharmaceutics, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Azin Khanali
- Department of Pharmaceutics, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Shaghayegh Aghajanshakeri
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Ali Farmoudeh
- Department of Pharmaceutics, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Ali Nokhodchi
- Pharmaceutics Research Laboratory, School of Life Sciences, University of Sussex, Brighton, UK
- Lupin Research Center, Coral Springs, FL, USA
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12
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Magnano GC, Carton F, Boccafoschi F, Marussi G, Cocetta E, Crosera M, Adami G, Voinovich D, Larese Filon F. Evaluating the role of protective creams on the cutaneous penetration of Ni nanoparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 328:121654. [PMID: 37080514 DOI: 10.1016/j.envpol.2023.121654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/14/2023] [Accepted: 04/15/2023] [Indexed: 05/03/2023]
Abstract
There is an increase of application of Nickel in the form of nanoparticles (NiNPs) in several fields including modern metallurgy, bioengineering, and medicine. Such growth of the areas of application is actually accompanied with an increase of exposure to Nickel, thus an intensification of the negative effects, the most frequent being the allergic contact dermatitis. Indeed, due to their smaller size, and therefore their higher surface area, NiNPs can release more Ni ions compared to bulk material, that can penetrate and permeate through the skin. To reduce the Ni cutaneous penetration, barrier creams (BC) are applied on the skin surface. There is little information, however, on the efficiency of such commercial protective creams on decreasing Ni cutaneous penetration. For this reason, the objective of the current study was to investigate the protective role of one commercially available formulation for Ni (Nik-L-Block™ containing a chelating agent) and one moisturizing cream (Ceramol 311 basic cream without chelating agent), following exposure to NiNPs, using in vitro Franz cells, as well as the cytotoxicity of NiNPs in primary human dermal fibroblasts was studied. Our results demonstrated that although both tested formulations can decrease Ni accumulation in the skin (4.13 ± 1.74 μg/cm2 for Nik-L-Block™ and 7.14 ± 1.46 μg/cm2 for Ceramol 311 basic cream); there are significant differences between the two creams (p = 0.004). Based on the experimental evidence, we therefore conclude that the composition of such formulations has an imperative role for dermal uptake of Ni. Finally, NiNPs showed no cytotoxic effect on cultured human dermal fibroblasts after 24 and 72 h.
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Affiliation(s)
- Greta Camilla Magnano
- Clinical Unit of Occupational Medicine, University of Trieste, Italy; Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy.
| | - Flavia Carton
- Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Francesca Boccafoschi
- Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Giovanna Marussi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Elisa Cocetta
- Clinical Unit of Occupational Medicine, University of Trieste, Italy
| | - Matteo Crosera
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Gianpiero Adami
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Dario Voinovich
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
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13
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Zhang S, Cheng Z, Yang M, Guo Z, Zhao L, Baqar M, Lu Y, Wang L, Sun H. Percutaneous Penetration of Liquid Crystal Monomers (LCMs) by In Vitro Three-Dimensional Human Skin Equivalents: Possible Mechanisms and Implications for Human Dermal Exposure Risks. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:4454-4463. [PMID: 36867107 DOI: 10.1021/acs.est.2c07844] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Liquid crystal monomers (LCMs) are indispensable materials in liquid crystal displays, which have been recognized as emerging persistent, bioaccumulative, and toxic organic pollutants. Occupational and nonoccupational exposure risk assessment suggested that dermal exposure is the primary exposure route for LCMs. However, the bioavailability and possible mechanisms of dermal exposure to LCMs via skin absorption and penetration remain unclear. Herein, we used EpiKutis 3D-Human Skin Equivalents (3D-HSE) to quantitatively assess the percutaneous penetration of nine LCMs, which were detected in e-waste dismantling workers' hand wipes with high detection frequencies. LCMs with higher log Kow and greater molecular weight (MW) were more difficult to penetrate through the skin. Molecular docking results showed that ABCG2 (an efflux transporter) may be responsible for percutaneous penetration of LCMs. These results suggest that passive diffusion and active efflux transport may be involved in the penetration of LCMs across the skin barrier. Furthermore, the occupational dermal exposure risks evaluated based on the dermal absorption factor suggested the underestimation of the continuous LCMs' health risks via dermal previously.
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Affiliation(s)
- Shaohan Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Zhipeng Cheng
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ming Yang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Zijin Guo
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Leicheng Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Mujtaba Baqar
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yuan Lu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Lei Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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14
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Safety Assessment of Starch Nanoparticles as an Emulsifier in Human Skin Cells, 3D Cultured Artificial Skin, and Human Skin. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020806. [PMID: 36677864 PMCID: PMC9866426 DOI: 10.3390/molecules28020806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
Emulsion systems are widely used in various industries, including the cosmetic, pharmaceutical, and food industries, because they require emulsifiers to stabilize the inherently unstable contact between oil and water. Although emulsifiers are included in many products, excessive use of emulsifiers destroys skin barriers and causes contact dermatitis. Accordingly, the consumer demand for cosmetic products made from natural ingredients with biocompatibility and biodegradability has increased. Starch in the form of solid nanosized particles is considered an attractive emulsifier that forms and stabilizes Pickering emulsion. Chemical modification of nanosized starch via acid hydrolysis can effectively provide higher emulsion stability. However, typical acid hydrolysis limits the industrial application of starch due to its high time consumption and low recovery. In previous studies, the effects of starch nanoparticles (SNPs) prepared by treatment with acidic dry heat, which overcomes these limitations, on the formation and stability of Pickering emulsions were reported. In this study, we evaluated the safety of SNPs in skin cell lines, 3D cultured skin, and human skin. We found that the cytotoxicity of SNPs in both HaCaT cells and HDF cells could be controlled by neutralization. We also observed that SNPs did not induce structural abnormalities on 3D cultured skin and did not permeate across micropig skin tissue or human skin membranes. Furthermore, patches loaded with SNPs were found to belong in the "No irritation" category because they did not cause any irritation when placed on human skin. Overall, the study results suggest that SNPs can be used as a safe emulsifier in various industries, including in cosmetics.
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Bruno MC, Gagliardi A, Mancuso A, Barone A, Tarsitano M, Cosco D, Cristiano MC, Fresta M, Paolino D. Oleic acid-based vesicular nanocarriers for topical delivery of the natural drug thymoquinone: Improvement of anti-inflammatory activity. J Control Release 2022; 352:74-86. [PMID: 36228953 DOI: 10.1016/j.jconrel.2022.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/19/2022] [Accepted: 10/04/2022] [Indexed: 11/08/2022]
Abstract
The topical administration of a drug compound remains the first choice for the treatment of many local skin ailments. Many skin diseases can be treated by applying the active formulation directly to the skin, but unfortunately some drugs are unable to overcome the stratum corneum and exert their pharmacological action. An example is thymoquinone, a naturally derived drug obtained from Nigella sativa L. and potentially effective in the treatment of inflammatory and oxidative skin conditions. Since its physico-chemical properties are not suitable for overcoming the stratum corneum, we wanted to circumvent the problem by proposing new lipid-based nanovesicles called "oleoethosomes", made up of naturally derived ingredients, for its delivery. Among several formulations of oleoethosomes, the sample made up of 2% (w/w) oleic acid:PL90G 1:1 (molar ratio), and ethanol 15% showed the best physico-chemical characteristics and above all it showed the capacity to contain a suitable amount of thymoquinone (2 mg/ml). The formulation was tested in vitro on stratum corneum and viable epidermis membranes confirming its ability to induce the passage of thymoquinone through the human stratum corneum and to act as a permeation enhancer. In fact, it showed thymoquinone permeation values of 22.63 ± 1.49% regarding the applied drug amount. Oleoethosomes were compared with oleosomes, another kind of naturally derived nanosystems but free of ethanol. The experimental data confirmed that ethanol was an important component that enhanced the activity of the oleoethosomes when tested on the skin of healthy volunteers. The thymoquinone-loaded oleoethosome treatment demonstrated a significantly greater extent of anti-inflammatory activity than the treatment with thymoquinone-loaded oleosomes or the conventional dosage form of the drug. These in vivo results confirmed the synergic effect between oleic acid and ethanol on the lipid and protein compartments of the outermost skin layer, thus promoting a greater penetration capacity.
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Affiliation(s)
- Maria Chiara Bruno
- Department of Health Sciences, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy
| | - Agnese Gagliardi
- Department of Health Sciences, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy
| | - Antonia Mancuso
- Department of Experimental and Clinical Medicine, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy
| | - Antonella Barone
- Department of Experimental and Clinical Medicine, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy
| | - Martine Tarsitano
- Department of Health Sciences, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy
| | - Donato Cosco
- Department of Health Sciences, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy
| | - Maria Chiara Cristiano
- Department of Experimental and Clinical Medicine, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy.
| | - Massimo Fresta
- Department of Health Sciences, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy.
| | - Donatella Paolino
- Department of Experimental and Clinical Medicine, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta"- Building of BioSciences, Viale Europa, Catanzaro I-88100, Italy.
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16
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Validation and testing of a new artificial biomimetic barrier for estimation of transdermal drug absorption. Int J Pharm 2022; 628:122266. [DOI: 10.1016/j.ijpharm.2022.122266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/30/2022] [Accepted: 10/01/2022] [Indexed: 11/22/2022]
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17
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Cyclodipeptides: From Their Green Synthesis to Anti-Age Activity. Biomedicines 2022; 10:biomedicines10102342. [PMID: 36289604 PMCID: PMC9598056 DOI: 10.3390/biomedicines10102342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/11/2022] [Accepted: 09/13/2022] [Indexed: 12/24/2022] Open
Abstract
Cyclodipeptides (CDPs) or diketopiperazines (DKPs) are often found in nature and in foodstuff and beverages and have attracted great interest for their bioactivities, biocompatibility, and biodegradability. In the laboratory, they can be prepared by green procedures, such as microwave-assisted cyclization of linear dipeptides in water, as performed in this study. In particular, five CDPs were prepared and characterized by a variety of methods, including NMR and ESI-MS spectroscopies and single-crystal X-ray diffraction (XRD), and their cytocompatibility and anti-aging activity was tested in vitro, as well as their ability to penetrate the different layers of the skin. Although their mechanism of action remains to be elucidated, this proof-of-concept study lays the basis for their future use in anti-age cosmetic applications.
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18
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Fedorowicz J, Bazar D, Brankiewicz W, Kapica H, Ciura K, Zalewska-Piątek B, Piątek R, Cal K, Mojsiewicz-Pieńkowska K, Sączewski J. Development of Safirinium dyes for new applications: fluorescent staining of bacteria, human kidney cells, and the horny layer of the epidermis. Sci Rep 2022; 12:15098. [PMID: 36065005 PMCID: PMC9445088 DOI: 10.1038/s41598-022-19262-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 08/26/2022] [Indexed: 11/09/2022] Open
Abstract
Low-molecular synthetic fluorophores are convenient tools in bioimaging applications. Several derivatives of Safirinium dyes as well as their reactive N-hydroxysuccinimide (NHS) esters bearing diverse substituents were synthesized and evaluated experimentally in terms of their lipophilicity by means of reverse-phase and immobilized artificial membrane high-performance liquid chromatography. Subsequently, the selected compounds were employed as novel cellular imaging agents for staining Gram-positive and Gram-negative bacteria, human kidney cell line, as well as human skin tissue. The analyzed dyes allowed for visualization of cellular structures such as mitochondria, endoplasmic reticulum, and cellular nuclei. They proved to be useful in fluorescent staining of stratum corneum, especially in the aspect of xenobiotic exposure and its penetration into the skin. The best results were obtained with the use of moderately lipophilic NHS esters of Safirinium Q. The development of Safirinium dyes is a promising alternative for commercially available dyes since the reported molecules have low molecular masses and exhibit efficient staining and remarkable water solubility. Moreover, they are relatively simple and low-cost in synthesis.
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Affiliation(s)
- Joanna Fedorowicz
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56 (Viikinkaari 5 E), 00014, Helsinki, Finland. .,Department of Chemical Technology of Drugs, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416, Gdańsk, Poland.
| | - Dagmara Bazar
- Department of Physical Chemistry, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416, Gdańsk, Poland
| | - Wioletta Brankiewicz
- Department of Pharmaceutical Technology and Biochemistry, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Hanna Kapica
- Department of Physical Chemistry, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416, Gdańsk, Poland
| | - Krzesimir Ciura
- Department of Physical Chemistry, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416, Gdańsk, Poland.,QSAR Lab Ltd., Trzy Lipy 3 St., 80-172, Gdańsk, Poland
| | - Beata Zalewska-Piątek
- Department of Molecular Biotechnology and Microbiology, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Rafał Piątek
- Department of Molecular Biotechnology and Microbiology, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland.,BioTechMed Center, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Krzysztof Cal
- Department of Pharmaceutical Technology, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416, Gdańsk, Poland
| | | | - Jarosław Sączewski
- Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416, Gdańsk, Poland
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19
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Abou-Elwafa Abdallah M, Harrad S. Dermal uptake of chlorinated organophosphate flame retardants via contact with furniture fabrics; implications for human exposure. ENVIRONMENTAL RESEARCH 2022; 209:112847. [PMID: 35104485 DOI: 10.1016/j.envres.2022.112847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/27/2021] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
The chlorinated organophosphate flame retardants (Cl-PFRs): tris-(2-chloroethyl)-phosphate (TCEP), tris-(1-chloro-2-propyl)-phosphate (TCIPP) and tris-(1,3-dichloropropyl)-phosphate (TDCIPP), have been widely used in upholstered furniture despite their carcinogenic potential. Although Cl-PFRs are mainly added to furniture foam, they are present in the fabrics likely due to migration from the foam. While several studies have assessed human exposure to Cl-PFRs via different pathways, no information exists on dermal uptake of these chemicals through contact with fabrics. In the current study, dermal absorption of TCEP, TCIPP and TDCIPP from 3 UK domestic furniture fabrics was experimentally assessed for the first time using in vitro 3D-human skin equivalents (EpiSkin™) under different real-life exposure scenarios. Results revealed all 3 target Cl-PFRs were dermally bioavailable to varying degrees (3.5%-25.9% of exposure dose) following 24 h contact with the studied fabrics. Estimated permeability coefficients (KP, cm h-1) showed TCEP had the highest percutaneous penetration potential followed by TCIPP, then TDCIPP. Further investigation revealed human dermal uptake of Cl-PFRs can be influenced by several factors including: the specific physicochemical properties of the compound, the type of exposure matrix, the exposure dose and the degree of skin hydration at the point of contact. Exposure assessment revealed UK adults and toddlers can be exposed to 20.4 and 14.1 ng TCIPP/kg bw/day via contact with furniture fabrics in summer, which is higher than international average exposures via inhalation and dust ingestion for adults and dietary exposure for toddlers. Therefore, risk assessment studies for Cl-PFRs and future replacements should consider dermal contact with consumer products (e.g. furniture fabrics) as a potential significant human exposure pathway.
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Affiliation(s)
- Mohamed Abou-Elwafa Abdallah
- School of Geography, Earth, and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom; Department of Analytical Chemistry, Faculty of Pharmacy, Assiut University, 71526, Assiut, Egypt.
| | - Stuart Harrad
- School of Geography, Earth, and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom
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20
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Mousa IA, Hammady TM, Gad S, Zaitone SA, El-Sherbiny M, Sayed OM. Formulation and Characterization of Metformin-Loaded Ethosomes for Topical Application to Experimentally Induced Skin Cancer in Mice. Pharmaceuticals (Basel) 2022; 15:657. [PMID: 35745575 PMCID: PMC9227071 DOI: 10.3390/ph15060657] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 05/16/2022] [Accepted: 05/19/2022] [Indexed: 02/04/2023] Open
Abstract
To achieve the best treatment of skin cancer, drug penetration inside the deepest layers of the skin is an important scientific interest. We designed an ethosome formulation that serves as a carrier for metformin and measured the in vitro skin permeation. We also aimed to measure the antitumor activity of the optimal ethosomal preparation when applied topically to chemically induced skin cancer in mice. We utilized a statistical Box-Behnken experimental design and applied three variables at three levels: lecithin concentration, cholesterol concentration and a mixture of ethanol and isopropyl alcohol concentrations. All formulations were prepared to calculate the entrapment efficiency %, zeta potential, size of the vesicles and drug release % after 1, 2, 4, 8 and 24 h. The size of the vesicles for the formulations was between 124 ± 14.2 nm and 560 ± 127 nm, while the entrapment efficiency was between 97.8 ± 0.23% and 99.4 ± 0.24%, and the drug release % after 8 h was between 38 ± 0.82% and 66 ± 0.52%. All formulations were introduced into the Box-Behnken software, which selected three formulations; then, one was assigned as an optimal formula. The in vivo antitumor activity of metformin-loaded ethosomal gel on skin cancer was greater than the antitumor activity of the gel preparation containing free metformin. Lower lecithin, high ethanol and isopropyl alcohol and moderate cholesterol contents improved the permeation rate. Overall, we can conclude that metformin-loaded ethosomes are a promising remedy for treating skin cancers, and more studies are warranted to approve this activity in other animal models of skin cancers.
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Affiliation(s)
- Ibrahim A. Mousa
- General Authority of Health Care, Ismailia Governorate, Ismailia 11517, Egypt;
| | - Taha M. Hammady
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt;
| | - Shadeed Gad
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt;
| | - Sawsan A. Zaitone
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Mohamed El-Sherbiny
- Department of Basic Medical Sciences, College of Medicine, AlMaarefa University, Riyadh P.O. Box 71666, Saudi Arabia;
- Department of Anatomy, Faculty of Medicine, Mansoura University, Mansoura 3155, Egypt
| | - Ossama M. Sayed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Sinai University, Kantra 41636, Egypt;
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21
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Petersen EJ, Uhl R, Toman B, Elliott JT, Strickland J, Truax J, Gordon J. Development of a 96-Well Electrophilic Allergen Screening Assay for Skin Sensitization Using a Measurement Science Approach. TOXICS 2022; 10:257. [PMID: 35622670 PMCID: PMC9147637 DOI: 10.3390/toxics10050257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/26/2022] [Accepted: 05/05/2022] [Indexed: 12/12/2022]
Abstract
The Electrophilic Allergen Screening Assay (EASA) has emerged as a promising in chemico method to detect the first key event in the adverse outcome pathway (AOP) for skin sensitization. This assay functions by assessing the depletion of one of two probe molecules (4-nitrobenzenethiol (NBT) and pyridoxylamine (PDA)) in the presence of a test compound (TC). The initial development of EASA utilized a cuvette format resulting in multiple measurement challenges such as low throughput and the inability to include adequate control measurements. In this study, we describe the redesign of EASA into a 96-well plate format that incorporates in-process control measurements to quantify key sources of variability each time the assay is run. The data from the analysis of 67 TCs using the 96-well format had 77% concordance with animal data from the local lymph node assay (LLNA), a result consistent with that for the direct peptide reactivity assay (DPRA), an OECD test guideline (442C) protein binding assay. Overall, the measurement science approach described here provides steps during assay development that can be taken to increase confidence of in chemico assays by attempting to fully characterize the sources of variability and potential biases and incorporate in-process control measurements into the assay.
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Affiliation(s)
- Elijah J. Petersen
- Biosystems and Biomaterials Division, Material Measurement Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, MD 20899, USA;
| | - Richard Uhl
- Division of Laboratory Sciences, Chemistry, US Consumer Product Safety Commission (CPSC), 5 Research Place, Rockville, MD 20850, USA;
| | - Blaza Toman
- Statistical Engineering Division, Information Technology Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, MD 20899, USA;
| | - John T. Elliott
- Biosystems and Biomaterials Division, Material Measurement Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, MD 20899, USA;
| | - Judy Strickland
- Inotiv-RTP., 601 Keystone Park Drive, Suite 800, Morrisville, NC 27560, USA; (J.S.); (J.T.)
| | - James Truax
- Inotiv-RTP., 601 Keystone Park Drive, Suite 800, Morrisville, NC 27560, USA; (J.S.); (J.T.)
| | - John Gordon
- Division of Toxicology and Risk Assessment, US Consumer Product Safety Commission (CPSC), 5 Research Place, Rockville, MD 20850, USA;
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22
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Kluxen FM, Totti S, Maas W, Toner F, Page L, Webbley K, Nagane R, Mingoia R, Whitfield C, Kendrick J, Valentine C, Dorange JB, Egron C, Imart C, Domoradzki JY, Fisher P, Lorez C, McEuen S, Felkers E, Chen T, Wiemann C. An OECD TG 428 study ring trial with 14C-Caffeine demonstrating repeatability and robustness of the dermal absorption in vitro method. Regul Toxicol Pharmacol 2022; 132:105184. [PMID: 35577015 DOI: 10.1016/j.yrtph.2022.105184] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/19/2022] [Accepted: 05/01/2022] [Indexed: 10/18/2022]
Abstract
The dermal absorption potential of 14C-Caffeine applied as a 4 mg/mL concentration (10 μL/cm2 finite dose) was investigated in six laboratories under Good Laboratory Practice conditions using an OECD TG 428-compliant in vitro assay with flow-through cells and split-thickness human skin. Potential sources of variation were reduced by a standardized protocol, test item and skin source. Particularly, skin samples from same donors were distributed over two repeats and between labs in a non-random, stratified design. Very similar recovery was achieved in the various assay compartments between laboratories, repeats and donors, demonstrating that the assay can be robustly and reliably performed. The absorption in one laboratory was 5-fold higher than in the others. This did not clearly correlate with skin integrity parameters but might be associated with an accidental COVID-19 pandemic-related interruption in sample shipment. It is possible that other factors may affect dermal absorption variation not routinely assessed or considered in the current method. The mean receptor fluid recovery, potential absorption (recovery in receptor fluid and skin except tape strips 1 and 2) and mass balance of caffeine was 6.99%, 7.14% and 99.13%, respectively, across all and 3.87%, 3.96% and 99.00% in the subset of five laboratories.
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Affiliation(s)
| | | | - Wilfred Maas
- Charles River Laboratories, Den Bosch, the Netherlands
| | - Frank Toner
- Charles River Laboratories, Tranent, United Kingdom
| | - Leanne Page
- Charles River Laboratories, Tranent, United Kingdom
| | | | | | | | | | | | | | | | | | | | | | - Philip Fisher
- Bayer SAS, Bayer Crop Science, Sophia, Antipolis, France
| | | | | | | | - Tao Chen
- University of Surrey, Guildford, United Kingdom
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23
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Mojsiewicz-Pieńkowska K, Krenczkowska D, Bazar D, Wielgomas B, Cal K, Kaliszan M. Comparative study of the percutaneous permeation and bioaccumulation of the cyclic siloxane using frozen-thawed and nonfrozen ex vivo human skin. Toxicol In Vitro 2022; 82:105379. [PMID: 35561954 DOI: 10.1016/j.tiv.2022.105379] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 04/06/2022] [Accepted: 05/06/2022] [Indexed: 11/25/2022]
Abstract
Literature shows contradictory information regarding the effect of freezing the excise skin ex vivo on the diffusion of substances into the skin. Few studies indicate that storing the human or animal skin in a frozen state decreases the barrier properties after thawing. Therefore, to understand the properties of frozen skin, we evaluated the effect of storage of ex vivo human skin (2 weeks at -20 °C) on the penetration of stratum corneum and permeation into deeper skin layers (epidermis, and dermis) as well as to the receptor fluid by octamethylcyclotetrasiloxane (D4) a representative test compound of cyclic siloxanes. The main research were preceded by checking the integrity of nonfrozen ex vivo human skin in comparison to the frozen-thawed one by using the Electrical Resistance technique (ER) and the fluorescence microscopy. Samples collected in the skin absorption experiment were analyzed by gas chromatography equipped with a flame ionization detector (GC-FID). The results of this study demonstrated that freezing of excised ex vivo human skin at -20 °C for up to 14 days does not alter the permeability of D4 in a statistically significant manner. Thus, our results confirmed the validity of using skin storage conditions for testing the penetration and permeation of xenobiotics recommended by the OECD, EMA, and WHO guidelines.
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Affiliation(s)
- Krystyna Mojsiewicz-Pieńkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland.
| | - Dominika Krenczkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland
| | - Dagmara Bazar
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland
| | - Bartosz Wielgomas
- Department of Toxicology, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland
| | - Krzysztof Cal
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical University of Gdańsk, Al. Gen. Józefa Hallera 107, 80-416 Gdańsk, Poland
| | - Michał Kaliszan
- Department of Forensic Medicine, Faculty of Medicine, Medical University of Gdańsk, ul. Dębowa 23, 80-204 Gdańsk, Poland
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24
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Transdermal permeation of inorganic cerium salts in intact human skin. Toxicol In Vitro 2022; 82:105381. [PMID: 35561953 DOI: 10.1016/j.tiv.2022.105381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 04/15/2022] [Accepted: 05/06/2022] [Indexed: 11/21/2022]
Abstract
The stratum corneum protects the body against external agents, such as metals, chemicals, and toxics. Although it is considered poorly permeable to them, comprising the major barrier to the permeation of such substances, it may become a relevant gate of entry for such molecules. Cerium (Ce) is a lanthanide that is widely used in catalytic, energy, biological and medicinal applications, owing to its intrinsic structural and unique redox properties. Cerium salts used to produce cerium oxide (CeO2) nanostructures can potentially come into contact with the skin and be absorbed following dermal exposure. The objective of this study was to investigate the percutaneous absorption of three inorganic Ce salts: cerium (III) chloride (CeCl3); cerium (III) nitrate (Ce(NO3)3) and ammonium cerium (IV) nitrate (Ce(NH4)2(NO3)6), which are commonly adopted for the synthesis of CeO2 using in vitro - ex vivo technique in Franz diffusion cells. The present work shows that Ce salts cannot permeate intact human skin, but they can penetrate significantly in the epidermis (up to 0.29 μg/cm2) and, to a lesser extent in dermis (up to 0.11 μg/cm2). Further studies are required to evaluate the potential effects of long-term exposure to Ce.
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25
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Sarango-Granda P, Espinoza LC, Díaz-Garrido N, Alvarado H, Rodríguez-Lagunas MJ, Baldomá L, Calpena A. Effect of Penetration Enhancers and Safety on the Transdermal Delivery of Apremilast in Skin. Pharmaceutics 2022; 14:1011. [PMID: 35631597 PMCID: PMC9147106 DOI: 10.3390/pharmaceutics14051011] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 02/04/2023] Open
Abstract
The poor water solubility of apremilast (APR) is the main impediment to the penetration of the drug through the skin barrier. The objective of this study was to evaluate the permeability of APR in different solutions enriched with penetration promoters in ex vivo samples of human skin, and additionally assess its tolerance in vivo. To this end, APR solutions with 5% promoter were developed, and the drug's ability to penetrate human abdominal skin samples was evaluated; the coefficients of permeability, cumulated amounts permeated, and flow were some of the parameters evaluated; likewise, the in vitro and in vivo tolerance of the solutions was evaluated. The results obtained showed that the solutions containing squalene as a promoter improved the penetration of APR compared to the other promoters evaluated; in the same way, on an in vitro scale in HaCaT cells, the promoters were not toxic, finding a cell viability greater than 80% at the different dilutions evaluated. In the in vivo tests carried out with the solution that presented the best results (APR-Squalene solution), it was observed that it does not cause irritation or erythema on the skin after its colorimetric and histological evaluation of the dorsal region of rats after its application. Squalene becomes an excellent candidate to improve the permeability of the drug in the case of the development of a topical formulation; in addition, it was confirmed that this penetration enhancer is neither toxic nor irritating when in contact with the skin in in vivo tests.
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Affiliation(s)
- Paulo Sarango-Granda
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (P.S.-G.); (H.A.); (A.C.)
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
- Departamento de Química, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador
| | - Lupe Carolina Espinoza
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
- Departamento de Química, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador
| | - Natalia Díaz-Garrido
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (N.D.-G.); (M.J.R.-L.); (L.B.)
- Institute of Biomedicine of the University of Barcelona (IBUB), Sant Joan de Déu Research Institute, 08028 Barcelona, Spain
| | - Helen Alvarado
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (P.S.-G.); (H.A.); (A.C.)
| | - María J. Rodríguez-Lagunas
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (N.D.-G.); (M.J.R.-L.); (L.B.)
- Nutrition and Food Safety Research Institute (INSA-UB), 08921 Santa Coloma de Gramenet, Spain
| | - Laura Baldomá
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (N.D.-G.); (M.J.R.-L.); (L.B.)
| | - Ana Calpena
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (P.S.-G.); (H.A.); (A.C.)
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
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26
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Cohen Y, Cohen G, Tworowski D, Eretz-Kdosha N, Silberstein E, Fallik E, Poverenov E. Biocompatible nanocarriers for passive transdermal delivery of insulin based on self-adjusting N-alkylamidated carboxymethyl cellulose polysaccharides. NANOSCALE ADVANCES 2022; 4:2124-2133. [PMID: 36133443 PMCID: PMC9419864 DOI: 10.1039/d2na00005a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 03/02/2022] [Indexed: 05/27/2023]
Abstract
In this work, we present biocompatible nanocarriers based on modified polysaccharides capable of transporting insulin macromolecules through human skin without any auxiliary techniques. N-Alkylamidated carboxymethyl cellulose (CMC) derivatives CMC-6 and CMC-12 were synthesized and characterized using attenuated total reflectance Fourier transform infrared (ATR-FTIR) and nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography and thermogravimetric, calorimetric and microscopic techniques. The prepared modified polysaccharides spontaneously assemble into soft nanoaggregates capable of adjusting to both aqueous and lipid environments. Due to this remarkable self-adjustment ability, CMC-6 and CMC-12 were examined for transdermal delivery of insulin. First, a significant increase in the amount of insulin present in lipid media upon encapsulation in CMC-12 was observed in vitro. Then, ex vivo studies on human skin were conducted. Those studies revealed that the CMC-12 carrier led to an enhancement of transdermal insulin delivery, showing a remarkable 85% insulin permeation. Finally, toxicity studies revealed no alteration in epidermal viability upon treatment and the absence of any skin irritation or amplified cytokine release, verifying the safety of the prepared carriers. Three-dimensional (3D) molecular modeling and conformational dynamics of CMC-6 and CMC-12 polymer chains explained their binding capacities and the ability to transport insulin macromolecules. The presented carriers have the potential to become a biocompatible, safe and feasible platform for the design of effective systems for transdermal delivery of bioactive macromolecules in medicine and cosmetics. In addition, transdermal insulin delivery reduces the pain and infection risk in comparison to injections, which may increase the compliance and glycemic control of diabetic patients.
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Affiliation(s)
- Yael Cohen
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Institute Rishon LeZion 7505101 Israel +972-39683354
- The Robert H Smith, Faculty of Agriculture, Food and Environment, Institute of Biochemistry, Food and Nutrition, The Hebrew University of Jerusalem Rehovot 76100 Israel
| | - Guy Cohen
- The Skin Research Institute, Dead Sea & Arava Science Center Masada 86910 Israel
- Eilat Campus, Ben-Gurion University of the Negev Eilat 8855630 Israel
| | - Dmitry Tworowski
- Department of Structural Biology, Weizmann Institute of Science 76100 Rehovot Israel
| | - Noy Eretz-Kdosha
- The Skin Research Institute, Dead Sea & Arava Science Center Masada 86910 Israel
| | - Eldad Silberstein
- Department of Plastic Surgery, Soroka University Medical Center, Ben-Gurion University of the Negev Beer-Sheva Israel
| | - Elazar Fallik
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Institute Rishon LeZion 7505101 Israel +972-39683354
| | - Elena Poverenov
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Institute Rishon LeZion 7505101 Israel +972-39683354
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27
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Jung N, Namjoshi S, Mohammed Y, Grice JE, Benson HAE, Raney SG, Roberts MS, Windbergs M. Application of Confocal Raman Microscopy for the Characterization of Topical Semisolid Formulations and their Penetration into Human Skin Ex Vivo. Pharm Res 2022; 39:935-948. [PMID: 35411509 PMCID: PMC9160154 DOI: 10.1007/s11095-022-03245-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 03/21/2022] [Indexed: 12/02/2022]
Abstract
PURPOSE The quality testing and approval procedure for most pharmaceutical products is a streamlined process with standardized procedures for the determination of critical quality attributes. However, the evaluation of semisolid dosage forms for topical drug delivery remains a challenging task. The work presented here highlights confocal Raman microscopy (CRM) as a valuable tool for the characterization of such products. METHODS CRM, a laser-based method, combining chemically-selective analysis and high resolution imaging, is used for the evaluation of different commercially available topical acyclovir creams. RESULTS We show that CRM enables the spatially resolved analysis of microstructural features of semisolid products and provides insights into drug distribution and polymorphic state as well as the composition and arrangement of excipients. Further, we explore how CRM can be used to monitor phase separation and to study skin penetration and the interaction with fresh and cryopreserved excised human skin tissue. CONCLUSION This study presents a comprehensive overview and illustration of how CRM can facilitate several types of key analyses of semisolid topical formulations and of their interaction with their biological target site, illustrating that CRM is a useful tool for research, development as well as for quality testing in the pharmaceutical industry.
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Affiliation(s)
- Nathalie Jung
- Institute of Pharmaceutical Technology and Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany
| | - Sarika Namjoshi
- Diamantina Institute, The University of Queensland, Brisbane, Australia
| | - Yousuf Mohammed
- Diamantina Institute, The University of Queensland, Brisbane, Australia
| | - Jeffrey E Grice
- Diamantina Institute, The University of Queensland, Brisbane, Australia
| | - Heather A E Benson
- Curtin Medical School, Curtin University, Perth, Australia
- UniSA Clinical and Health Sciences, University of South Australia, Basil Hetzel Institute for Translational Health Research, Woodville South, Australia
| | - Sam G Raney
- Office of Research and Standards, Office of Generic Drugs, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Michael S Roberts
- Diamantina Institute, The University of Queensland, Brisbane, Australia
- UniSA Clinical and Health Sciences, University of South Australia, Basil Hetzel Institute for Translational Health Research, Woodville South, Australia
| | - Maike Windbergs
- Institute of Pharmaceutical Technology and Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany.
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28
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Magnano GC, Marussi G, Adami G, Crosera M, Larese Filon F. Assessment of dermal absorption of beryllium and copper contained in temple tips of eyeglasses. Toxicol Lett 2022; 361:64-71. [PMID: 35427767 DOI: 10.1016/j.toxlet.2022.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/30/2022] [Accepted: 04/08/2022] [Indexed: 11/30/2022]
Abstract
Dermal exposure to hazardous substances such as chemicals, toxics, metallic items and other contaminants may present substantial danger for health. Beryllium (Be) is a hazardous metal, especially when inhaled and/or in direct contact with the skin, associated with chronic beryllium disease (CBD) and Be sensitization (BeS). The objective of this study was to investigate the percutaneous penetration of beryllium and copper contained in metallic items as eyeglass temple tips (specifically BrushCAST® Copper Beryllium Casting Alloys containing Be 0.35 < 2.85%; Cu 95.3-98.7%), using Franz diffusion cells. This work demonstrated that the total skin absorption of Cu was higher (8.86%) compared to Be (4.89%), which was expected based on the high percentage of Cu contained in the eyeglass temple tips. However, Be accumulated significantly in the epidermis and dermis (up to 0.461 µg/cm2) and, to a lesser extent, in the stratum corneum (up to 0.130 µg/cm2) with a flux of permeation of 3.52 ± 4.5 µg/cm2/hour and lag time of 2.3 ± 1.3 h, after cutaneous exposure of temple tip into 1.0 mL artificial sweat for 24 h. Our study highlights the importance of avoiding the use of Be alloys in items following long-term skin contact.
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Affiliation(s)
- Greta Camilla Magnano
- Clinical Unit of Occupational Medicine, University of Trieste, Italy; Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy.
| | - Giovanna Marussi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Gianpiero Adami
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Matteo Crosera
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
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29
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Champmartin C, Chedik L, Marquet F, Cosnier F. Occupational exposure assessment with solid substances: choosing a vehicle for in vitro percutaneous absorption experiments. Crit Rev Toxicol 2022; 52:294-316. [PMID: 36125048 DOI: 10.1080/10408444.2022.2097052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Percutaneous occupational exposure to industrial toxicants can be assessed in vitro on excised human or animal skins. Numerous factors can significantly influence skin permeation of chemicals and the flux determination. Among them, the vehicle used to solubilize the solid substances is a tricky key step. A "realistic surrogate" that closely matches the exposure scenario is recommended in first intention. When direct transposition of occupational exposure conditions to in vitro experiments is impossible, it is recommended that the vehicle used does not affect the skin barrier (in particular in terms of structural integrity, composition, or enzymatic activity). Indeed, any such effect could alter the percutaneous absorption of substances in a number of ways, as we will see. Potential effects are described for five monophasic vehicles, including the three most frequently used: water, ethanol, acetone; and two that are more rarely used, but are realistic: artificial sebum and artificial sweat. Finally, we discuss a number of criteria to be verified and the associated tests that should be performed when choosing the most appropriate vehicle, keeping in mind that, in the context of occupational exposure, the scientific quality of the percutaneous absorption data provided, and how they are interpreted, may have long-range consequences. From the narrative review presented, we also identify and discuss important factors to consider in future updates of the OECD guidelines for in vitro skin absorption experiments.
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Affiliation(s)
- Catherine Champmartin
- French National Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Vandoeuvre-les-Nancy Cedex, France
| | - Lisa Chedik
- French National Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Vandoeuvre-les-Nancy Cedex, France
| | - Fabrice Marquet
- French National Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Vandoeuvre-les-Nancy Cedex, France
| | - Frédéric Cosnier
- French National Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Vandoeuvre-les-Nancy Cedex, France
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30
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Dermal Absorption of Sesquiterpene Lactones from Arnica Tincture. Pharmaceutics 2022; 14:pharmaceutics14040742. [PMID: 35456576 PMCID: PMC9027632 DOI: 10.3390/pharmaceutics14040742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 11/23/2022] Open
Abstract
Arnica tincture is a traditional herbal medicine used to treat blunt injuries, e.g., bruises and squeezes. In addition, a potential new use in the treatment of cutaneous leishmaniasis is currently under investigation. Therefore, detailed information about the dermal absorption of the tincture and especially its bioactive constituents, sesquiterpene lactones (STLs) of the helenalin- and 11α,13-dihydrohelenalin type, is mandatory. Consequently, this article reports on dermal absorption studies of Arnica tincture using diffusion cells and porcine skin as well as two human skin samples with different permeability. The amounts of STLs on the skin surfaces, in skin extracts and in the receptor fluids were quantified by ultra-high-performance liquid chromatography with high-resolution mass spectrometry (UHPLC-HRMS). It was found that Arnica STLs permeated into the receptor fluid already 4 h after the application, but the amount was rather low. Within 48 h, a maximum of 8.4%, 14.6% and 36.4% of STLs permeated through porcine skin, human skin A (trans-epidermal water loss (TEWL) = 11.518 g·m−2·h−1) and the more permeable human skin B (TEWL = 17.271 g·m−2·h−1), respectively. The majority of STLs was absorbed (penetrated into the skin; 97.6%, 97.8% and 99.3%) after 48 h but a huge portion could not be extracted from skin and is expected to be irreversibly bound to skin proteins. To better visualize the analytes in different skin layers, a fluorescence-labeled STL, helenalin 3,4-dimethoxycinnamate, was synthesized. Fluorescence microscopic images depict an accumulation of the fluorescent derivative in the epidermis. For the treatment of local, cutaneous complaints, an enrichment of the bioactive substances in the skin may be considered beneficial.
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31
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Keck CM, Abdelkader A, Pelikh O, Wiemann S, Kaushik V, Specht D, Eckert RW, Alnemari RM, Dietrich H, Brüßler J. Assessing the Dermal Penetration Efficacy of Chemical Compounds with the Ex-Vivo Porcine Ear Model. Pharmaceutics 2022; 14:678. [PMID: 35336052 PMCID: PMC8951478 DOI: 10.3390/pharmaceutics14030678] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/08/2022] [Accepted: 03/15/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Background: The ex vivo porcine ear model is often used for the determination of the dermal penetration efficacy of chemical compounds. This study investigated the influence of the post-slaughter storage time of porcine ears on the dermal penetration efficacy of chemical compounds. (2) Methods: Six different formulations (curcumin and different fluorescent dyes in different vehicles and/or nanocarriers) were tested on ears that were (i) freshly obtained, (ii) stored for 24 or 48 h at 4 °C after slaughter before use and (iii) freshly frozen and defrosted 12 h before use. (3) Results: Results showed that porcine ears undergo post-mortem changes. The changes can be linked to rigor mortis and all other well-described phenomena that occur with carcasses after slaughter. The post-mortem changes modify the skin properties of the ears and affect the penetration efficacy. The onset of rigor mortis causes a decrease in the water-holding capacity of the ears, which leads to reduced penetration of chemical compounds. The water-holding capacity increases once the rigor is released and results in an increased penetration efficacy for chemical compounds. Despite different absolute penetration values, no differences in the ranking of penetration efficacies between the different formulations were observed between the differently aged ears. (4) Conclusions: All different types of ears can be regarded to be suitable for dermal penetration testing of chemical compounds. The transepidermal water loss (TEWL) and/or skin hydration of the ears were not correlated with the ex vivo penetration efficacy because both an impaired skin barrier and rigor mortis cause elevated skin hydration and TEWL values but an opposite penetration efficacy. Other additional values (for example, pH and/or autofluorescence of the skin) should, therefore, be used to select suitable and non-suitable skin areas for ex vivo penetration testing. Finally, data from this study confirmed that smartFilms and nanostructured lipid carriers (NLC) represent superior formulation strategies for efficient dermal and transdermal delivery of curcumin.
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Affiliation(s)
- Cornelia M. Keck
- Department of Pharmaceutics and Biopharmaceutics, Philipps-University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany; (A.A.); (O.P.); (S.W.); (V.K.); (D.S.); (R.W.E.); (R.M.A.); (H.D.); (J.B.)
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32
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Magnano GC, Marussi G, Pavoni E, Adami G, Larese Filon F, Crosera M. Percutaneous metals absorption following exposure to road dust powder. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118353. [PMID: 34637821 DOI: 10.1016/j.envpol.2021.118353] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
The skin constitutes a protective barrier to external physical and chemical aggressions. Although it is constantly exposed to various xenobiotics, it is generally considered poorly permeable to them, as for example metal ions, becoming unfortunately an entry route of such substances. Metals may penetrate inside the skin inducing more or less local effects such as skin sensitization and potential metals diffusion into the bloodstream. The objective of the study was to investigate the percutaneous penetration of metals in vitro - ex vivo in Franz cell with intact as well damaged skin applying a road dust powder. Moreover, porcine and human skins were compared. This study demonstrated that, after the application of a road dust powder on the skin, metals can penetrate and permeate this cutaneous membrane. From this experimental analysis, in intact skin lead (Pb) achieved the highest skin absorption in both human and porcine skin, while skin absorption profile of cobalt (Co) was the lowest in human skin than the one in porcine model. The concentrations of Ni present in receiving solution were higher compared to other metals in all experiments performed. The present work, definitely shows that metals permeation through damaged skin is accelerated than intact skin, as a result of the weaker cutaneous barrier function. According to published data, pig skin appeared as a suitable model for human skin. Our results confirmed that skin absorption of metals can be relevant in environmental exposures.
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Affiliation(s)
| | - Giovanna Marussi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Elena Pavoni
- Department of Mathematics and Geosciences, University of Trieste, Italy
| | - Gianpiero Adami
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | | | - Matteo Crosera
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
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The Penetration of Chromium. Dermatitis 2021; 33:368-372. [DOI: 10.1097/der.0000000000000805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Esposto Biondo N, Fretes Argenta D, Schneider Rauber G, Caon T. How to define the experimental conditions of skin permeation assays for drugs presenting biopharmaceutical limitations? The experience with testosterone. Int J Pharm 2021; 607:120987. [PMID: 34389422 DOI: 10.1016/j.ijpharm.2021.120987] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 12/22/2022]
Abstract
Cutaneous permeation assays are crucial to attest the performance or bioequivalence of topical or transdermal products. Although the official guidelines (e.g., FDA/EMA) play a key role in harmonizing the experimental design, alternative methods are often proposed by the scientific community, which makes it difficult to compare results from different studies. In this review, permeation assays with testosterone (TST) were selected to show this high variability in drug transport rate. The main sources of variation discussed were tissue thickness, animal model, donor and receptor fluid constitution, type of solubilizing agent used in aqueous fluids, drug concentration, degree of supersaturation, skin lipid content, number of experimental times and the physical-chemical stability of the molecule in test fluids. This variation becomes even more critical for molecules that present biopharmaceutical limitations such as TST. In addition, the skin presents specific receptors for this hormone due to its physiological action in this region of the body, which makes the evaluation of the TST transport rate in this tissue even more challenging. The impact of each experimental parameter mentioned above on the flux or permeation coefficient of TST is discussed in detail in the review. Assays used to evaluate tissue integrity are also presented.
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Affiliation(s)
- Nicole Esposto Biondo
- Postgraduate Program in Pharmacy (PGFAR), Federal University of Santa Catarina, Trindade, 88040-900 Florianopolis, SC, Brazil
| | - Débora Fretes Argenta
- Postgraduate Program in Pharmacy (PGFAR), Federal University of Santa Catarina, Trindade, 88040-900 Florianopolis, SC, Brazil
| | - Gabriela Schneider Rauber
- Postgraduate Program in Pharmacy (PGFAR), Federal University of Santa Catarina, Trindade, 88040-900 Florianopolis, SC, Brazil
| | - Thiago Caon
- Postgraduate Program in Pharmacy (PGFAR), Federal University of Santa Catarina, Trindade, 88040-900 Florianopolis, SC, Brazil.
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Im JE, Kim HY, Lee JD, Park JJ, Kang KS, Kim KB. Effect of Application Amounts on In Vitro Dermal Absorption Test Using Caffeine and Testosterone. Pharmaceutics 2021; 13:pharmaceutics13050641. [PMID: 33946395 PMCID: PMC8147129 DOI: 10.3390/pharmaceutics13050641] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 11/30/2022] Open
Abstract
Dermal absorption of chemicals is a key factor in risk assessment. This study investigated the effects of different amounts of application on dermal absorption and suggested an appropriate application dose for proper dermal absorption. Caffeine and testosterone were chosen as test compounds. An in vitro dermal absorption test was performed using a Franz diffusion cell. Different amounts (5, 10, 25, and 50 mg (or µL)/cm2) of semisolid (cream) and liquid (solution) formulations containing 1% caffeine and 0.1% testosterone were applied to rat and minipig (Micropig®) skins. After 24 h, the concentrations of both compounds remaining on the skin surface and in the stratum corneum, dermis and epidermis, and receptor fluid were determined using LC-MS / MS or HPLC. Dermal absorption of both compounds decreased with increasing amounts of application in both skin types (rat and minipig) and formulations (cream and solution). Especially, dermal absorptions (%) of both compounds at 50 mg (or µL)/cm2 was significantly lower compared to 5 or 10 mg (or µL)/cm2 in both rat and minipig skins. Therefore, a low dose (5 or 10 mg (or µL)/cm2) of the formulation should be applied to obtain conservative dermal absorption.
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Affiliation(s)
- Jueng-Eun Im
- College of Pharmacy, Dankook University, 119 Dandae-ro, Cheonan 31116, Korea; (J.-E.I.); (H.Y.K.); (J.D.L.); (J.-J.P.)
- Toxicological Evaluation and Research Department, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Cheongju 28159, Korea
| | - Hyang Yeon Kim
- College of Pharmacy, Dankook University, 119 Dandae-ro, Cheonan 31116, Korea; (J.-E.I.); (H.Y.K.); (J.D.L.); (J.-J.P.)
| | - Jung Dae Lee
- College of Pharmacy, Dankook University, 119 Dandae-ro, Cheonan 31116, Korea; (J.-E.I.); (H.Y.K.); (J.D.L.); (J.-J.P.)
| | - Jin-Ju Park
- College of Pharmacy, Dankook University, 119 Dandae-ro, Cheonan 31116, Korea; (J.-E.I.); (H.Y.K.); (J.D.L.); (J.-J.P.)
| | - Kyung-Soo Kang
- APURES Co., Ltd., Pyeongtae 13174, Korea;
- Department of Animal Sciences, Shingu College, Gwangmyeong-ro 377, Jungwon-gu, Seongnam-si 13174, Korea
| | - Kyu-Bong Kim
- College of Pharmacy, Dankook University, 119 Dandae-ro, Cheonan 31116, Korea; (J.-E.I.); (H.Y.K.); (J.D.L.); (J.-J.P.)
- Correspondence: ; Tel.: +82-41-550-1443; Fax: +82-41-559-7899
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Ramasamy S, Davoodi P, Vijayavenkataraman S, Teoh JH, Thamizhchelvan AM, Robinson KS, Wu B, Fuh JY, DiColandrea T, Zhao H, Lane EB, Wang CH. Optimized construction of a full thickness human skin equivalent using 3D bioprinting and a PCL/collagen dermal scaffold. ACTA ACUST UNITED AC 2021. [DOI: 10.1016/j.bprint.2020.e00123] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Quiñones-Vico MI, Fernández-González A, Pérez-Castejón E, Montero-Vílchez T, Arias-Santiago S. Cytotoxicity and Epidermal Barrier Function Evaluation of Common Antiseptics for Clinical Use in an Artificial Autologous Skin Model. J Clin Med 2021; 10:642. [PMID: 33567522 PMCID: PMC7914612 DOI: 10.3390/jcm10040642] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 12/29/2022] Open
Abstract
Bioengineered artificial skin substitutes (BASS) are the main treatment used in addition to autografts when skin injuries involve a large body surface area. Antiseptic/antibiotic treatment is necessary to prevent infections in the BASS implant area. This study aims to evaluate the effect of antiseptics and antibiotics on cell viability, structural integrity, and epidermal barrier function in BASS based on hyaluronic acid during a 28 day follow-up period. Keratinocytes (KTs) and dermal fibroblasts (DFs) were isolated from skin samples and used to establish BASS. The following antibiotic/antiseptic treatment was applied every 48 h: colistin (1%), chlorhexidine digluconate (1%), sodium chloride (0.02%), and polyhexanide (0.1%). Cell viability (LIVE/DEAD® assay), structural integrity (histological evaluation), and epidermal barrier function (trans-epidermal water loss, (TEWL), Tewameter®) were also evaluated. Cell viability percentage of BASS treated with chlorhexidine digluconate was significantly lower (p ≤ 0.001) than the other antiseptics at day 28. Compared to other treatments, chlorhexidine digluconate and polyhexanide significantly affected the epithelium. No significant differences were found regarding epidermal barrier. These results may be useful for treatment protocols after implantation of BASS in patients and evaluating them in clinical practice. BASS represent a suitable model to test in vitro the impact of different treatments of other skin wounds.
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Affiliation(s)
- María I. Quiñones-Vico
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, 18014 Granada, Spain; (M.I.Q.-V.); (E.P.-C.); (S.A.-S.)
- Biosanitary Institute of Granada (ibs. GRANADA), 18014 Granada, Spain;
- Andalusian Network of Design and Translation of Advanced Therapies, 41092 Sevilla, Spain
- Dermatology Department, School of Medicine, University of Granada, 18014 Granada, Spain
| | - Ana Fernández-González
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, 18014 Granada, Spain; (M.I.Q.-V.); (E.P.-C.); (S.A.-S.)
- Biosanitary Institute of Granada (ibs. GRANADA), 18014 Granada, Spain;
- Andalusian Network of Design and Translation of Advanced Therapies, 41092 Sevilla, Spain
| | - Elena Pérez-Castejón
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, 18014 Granada, Spain; (M.I.Q.-V.); (E.P.-C.); (S.A.-S.)
- Biosanitary Institute of Granada (ibs. GRANADA), 18014 Granada, Spain;
- Andalusian Network of Design and Translation of Advanced Therapies, 41092 Sevilla, Spain
| | - Trinidad Montero-Vílchez
- Biosanitary Institute of Granada (ibs. GRANADA), 18014 Granada, Spain;
- Dermatology Department, Virgen de las Nieves University Hospital, 18014 Granada, Spain
| | - Salvador Arias-Santiago
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, 18014 Granada, Spain; (M.I.Q.-V.); (E.P.-C.); (S.A.-S.)
- Biosanitary Institute of Granada (ibs. GRANADA), 18014 Granada, Spain;
- Andalusian Network of Design and Translation of Advanced Therapies, 41092 Sevilla, Spain
- Dermatology Department, School of Medicine, University of Granada, 18014 Granada, Spain
- Dermatology Department, Virgen de las Nieves University Hospital, 18014 Granada, Spain
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Knoth K, Zäh RK, Veldung B, Burgio D, Wiegand B, Smola H, Bock U, Lehr CM, Hittinger M, Groß H. Development and evaluation of a quality control system based on transdermal electrical resistance for skin barrier function in vitro. Skin Res Technol 2021; 27:668-675. [PMID: 33404151 DOI: 10.1111/srt.12998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/25/2020] [Accepted: 12/05/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND In vitro skin permeation experiments are highly relevant for pharmaceutical, cosmetic, agricultural developments, and regulatory evaluation. A key requirement is the skin barrier integrity, that is accompanied by an intact stratum corneum (SC) which implements high skin quality. A variety of integrity tests are currently available, for example, measurement of transepidermal water loss, monitoring the permeation of tritiated water and the measurement of transdermal electrical resistance (TER). MATERIALS AND METHODS We aimed for a non-destructive examination of barrier integrity as quality control system, based on TER. Therefore, the in-house developed instrument SkinTER measures electrical resistance on excised human skin samples in a non-invasive and easy-to-use pattern. In this proof of concept study, we compared three human in vitro skin models with focus on their TER and permeation properties. The skin integrity was impaired to mimic conditions of skin during age, lifestyle (eg, shaving) or diseases (eg, obesity, psoriasis, and atopic dermatitis). The OECD permeation marker caffeine was correlated to the corresponding TER value. RESULTS A correlation between both was obtained by having a Pearson coefficient of -0.830. Hereby, a minimum TER value for intact skin samples of ~1.77 kΩ*cm2 was suggested. Intact samples are significantly different (α = ≤0.05) to their impaired counterparts in flux and TER values. CONCLUSION The new SkinTER instrument gives a quick and non-invasive feedback on skin quality before a permeation experiment.
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Affiliation(s)
- Katharina Knoth
- Department of Drug Delivery, PharmBioTec GmbH, Saarbrücken, Germany
| | | | - Barbara Veldung
- Dr. med. Barbara Veldung, Specialist in Plastic and Aesthetic Surgery, Saarbrücken, Germany
| | | | - Birgit Wiegand
- Department of Drug Delivery, PharmBioTec GmbH, Saarbrücken, Germany
| | | | - Udo Bock
- Bock Project Management, Tawern, Germany
| | - Claus-Michael Lehr
- Department of Biopharmaceutics and Pharmaceutical Technology, Department of Pharmacy, Saarland University, Saarbrücken, Germany.,Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarbrücken, Germany
| | - Marius Hittinger
- Department of Drug Delivery, PharmBioTec GmbH, Saarbrücken, Germany.,3RProducts Marius Hittinger, Blieskastel, Germany
| | - Henrik Groß
- Department of Drug Delivery, PharmBioTec GmbH, Saarbrücken, Germany
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High efficacy, rapid onset nanobiolosomes of sildenafil as a topical therapy for erectile dysfunction in aged rats. Int J Pharm 2020; 591:119978. [PMID: 33122159 DOI: 10.1016/j.ijpharm.2020.119978] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 12/31/2022]
Abstract
Developing topical sildenafil for local treatment of erectile dysfunction has been of great interest in pharmaceutical research. Sildenafil citrate (SC) exhibited a well-documented success for treatment of several types of erectile dysfunction. However, its oral use is limited by serious adverse effects, poor bioavailability, delayed onset, and drug-drug interactions. This work is the first to design and assess sildenafil-loaded bilosomes for topical local treatment of erectile dysfunction. Different sildenafil-loaded bilosomes were prepared and characterized. Permeability of selected formulations was conducted through full-thickness human skin. Optimized bilosomes integrating sodium tauroglycocholate (STGC) showed spherical shape with good particle size (133 nm), high zeta potential (-53.6 mV) and high entrapment efficiency (87.45%). Ex-vivo permeability study revealed that about 39% of the applied dose permeated within 15 min. Furthermore, in-vivo appraisal of therapeutic efficacy was performed using aged male Sprague-Dawley rats. After single application of 2 mg/kg sildenafil loaded in STGC-bilosomes, behavioral and biochemical evaluation was carried out. Behavioral assessment recorded an increased rats' potency manifested as 2 folds increase in intromission frequency and intromission ratio compared to untreated group. That was accompanied by significant increase in cGMP concentration in corpora cavernosa (P < 0.0001) confirming increased potency. In conclusion, STGC-bilosomes could provide topical treatment of impotence with 20% of the oral dose and fast onset of action (10 min).
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40
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Ellison CA, Tankersley KO, Obringer CM, Carr GJ, Manwaring J, Rothe H, Duplan H, Géniès C, Grégoire S, Hewitt NJ, Jamin CJ, Klaric M, Lange D, Rolaki A, Schepky A. Partition coefficient and diffusion coefficient determinations of 50 compounds in human intact skin, isolated skin layers and isolated stratum corneum lipids. Toxicol In Vitro 2020; 69:104990. [DOI: 10.1016/j.tiv.2020.104990] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/18/2020] [Accepted: 08/27/2020] [Indexed: 11/24/2022]
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41
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Fresta M, Mancuso A, Cristiano MC, Urbanek K, Cilurzo F, Cosco D, Iannone M, Paolino D. Targeting of the Pilosebaceous Follicle by Liquid Crystal Nanocarriers: In Vitro and In Vivo Effects of the Entrapped Minoxidil. Pharmaceutics 2020; 12:pharmaceutics12111127. [PMID: 33266444 PMCID: PMC7700400 DOI: 10.3390/pharmaceutics12111127] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/17/2020] [Accepted: 11/19/2020] [Indexed: 12/22/2022] Open
Abstract
The topical administration of active compounds represents an advantageous strategy to reach the various skin components as well as its appendages. Pilosebaceous follicles are skin appendages originating in the deeper skin layers. They are very difficult to target, and hence higher active dosages are generally required to achieve effective biological responses, thus favoring the rise of side effects. The aim of this work was to design a supramolecular colloidal carrier, i.e., a liquid crystal nanocarrier, for the selective delivery of active compounds into the pilosebaceous follicle. This nanocarrier showed mean sizes of ~80 nm, a good stability, a negative surface charge, and great safety properties. In vitro studies highlighted its ability to contain and release different substances and to successfully permeate the skin. Minoxidil was encapsulated in the nanocarriers and the in vivo biological effect was compared with a conventional dosage form. Minoxidil-loaded liquid crystal nanocarrier was able to selectively reach the pilosebaceous follicle, thus allowing an increased biological effectiveness of the delivered active in terms of biological response, duration of the biological effects, and reduction of collaterals. Our investigation showed that liquid crystal nanocarriers represent a promising device for the treatment of different pilosebaceous follicular impairments/diseases.
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Affiliation(s)
- Massimo Fresta
- Department of Health Sciences, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”, viale Europa, 88100 Germaneto (CZ), Italy; (M.F.); (A.M.); (D.C.)
| | - Antonia Mancuso
- Department of Health Sciences, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”, viale Europa, 88100 Germaneto (CZ), Italy; (M.F.); (A.M.); (D.C.)
| | - Maria Chiara Cristiano
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”, viale Europa, 88100 Germaneto (CZ), Italy; (M.C.C.); (K.U.)
| | - Konrad Urbanek
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”, viale Europa, 88100 Germaneto (CZ), Italy; (M.C.C.); (K.U.)
| | - Felisa Cilurzo
- Department of Pharmacy, University of Chieti—Pescara “G. d’Annunzio”, Via dei Vestini 31, 66100 Chieti, Italy;
| | - Donato Cosco
- Department of Health Sciences, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”, viale Europa, 88100 Germaneto (CZ), Italy; (M.F.); (A.M.); (D.C.)
| | - Michelangelo Iannone
- National Council of Research (CNR), The Institute for Biomedical Research and Innovation, viale Europa, 88100 Germaneto (CZ), Italy;
| | - Donatella Paolino
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”, viale Europa, 88100 Germaneto (CZ), Italy; (M.C.C.); (K.U.)
- Correspondence: ; Tel.: +39-0961-369-4211
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42
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Abdelalim LR, Elnaggar YSR, Abdallah OY. Oleosomes Encapsulating Sildenafil Citrate as Potential Topical Nanotherapy for Palmar Plantar Erythrodysesthesia with High Ex vivo Permeation and Deposition. AAPS PharmSciTech 2020; 21:310. [PMID: 33164131 DOI: 10.1208/s12249-020-01862-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 10/24/2020] [Indexed: 12/19/2022] Open
Abstract
Palmar plantar erythrodysesthesia (PPE) is a commonly reported skin toxicity of chemotherapeutic agents that significantly affects patients' quality of life. PPE is described as inflammation, swelling, and even cracks and ulcers in the skin of palms and soles of the feet. Conventional treatment includes topical creams, analgesics, or corticosteroids. However, serious cases are not responding to these medications. PPE has been reported to cause drug cessation or dose reduction if not properly treated. Sildenafil citrate (SC) has a well-documented activity in wound healing through improving blood supply to the affected area. However, SC has poor physicochemical properties limiting its transdermal permeation and deposition. This research endeavored to elaborate novel vesicular system with natural components, phospholipids and oleic acid, loaded with sildenafil citrate for topical management of PPE. Sildenafil-loaded oleosomes were prepared using modified ethanol injection method. Optimized oleosomes had nanometric particle size (157.6 nm), negative zeta potential (- 85.2 mv), and high entrapment efficiency (95.56%). Ex vivo studies on human skin revealed that oleosomes displayed 2.3-folds higher permeation and 4.5-folds more deposition through the human skin compared to drug suspension. Results endorsed SC oleosomes as suitable topical treatment of PPE providing ameliorated sildenafil permeability in addition to acting as a reservoir for gradual release of the drug. Graphical abstract.
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43
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Santos LL, Swofford NJ, Santiago BG. In Vitro Permeation Test (IVPT) for Pharmacokinetic Assessment of Topical Dermatological Formulations. ACTA ACUST UNITED AC 2020; 91:e79. [PMID: 32991075 DOI: 10.1002/cpph.79] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In vitro assessment of topical (dermal) pharmacokinetics is a critical aspect of the drug development process for semi-solid products (e.g., solutions, foams, sprays, creams, gels, lotions, ointments), allowing for informed selection of new chemical entities, optimization of prototype formulations during the nonclinical stage, and determination of bioequivalence of generics. It can also serve as a tool to further understand the impact of different excipients on drug delivery, product quality, and formulation microstructure when used in parallel with other techniques, such as analyses of rheology, viscosity, microscopic characteristics, release rate, particle size, and oil droplet size distribution. The in vitro permeation test (IVPT), also known as in vitro skin penetration/permeation test, typically uses ex vivo human skin in conjunction with diffusion cells, such as Franz (or vertical) or Bronaugh (or flow-through) diffusion cells, and is the technique of choice for dermal pharmacokinetics assessment. Successful execution of the IVPT also involves the development and use of fit-for-purpose bioanalytical methods and procedures. The protocols described herein provide detailed steps for execution of the IVPT utilizing flow-through diffusion cells and for key aspects of the development of a liquid chromatography-tandem mass spectrometry method intended for analysis of the generated samples (epidermis, dermis, and receptor solution). © 2020 Wiley Periodicals LLC. Basic Protocol 1: In vitro permeation test Support Protocol: Dermatoming of ex vivo human skin Basic Protocol 2: Bioanalytical methodology in the context of the in vitro permeation test.
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Affiliation(s)
- Leandro L Santos
- Dermatology Unit, Topical Drug Delivery & DMPK, GlaxoSmithKline, Collegeville, Pennsylvania.,Current affiliation: Incyte Corporation, Inflammation & AutoImmunity, Clinical Research, Wilmington, Delaware
| | - Nathaniel J Swofford
- Dermatology Unit, Topical Drug Delivery & DMPK, GlaxoSmithKline, Collegeville, Pennsylvania.,Current affiliation: Functional Genomics, High-Throughput Biology and Imaging, GlaxoSmithKline, Collegeville, Pennsylvania
| | - Brandon G Santiago
- Dermatology Unit, Topical Drug Delivery & DMPK, GlaxoSmithKline, Collegeville, Pennsylvania.,Current affiliation: Bioanalysis, Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, Collegeville, Pennsylvania
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Mojsiewicz-Pieńkowska K, Stachowska E, Krenczkowska D, Bazar D, Meijer F. Evidence of Skin Barrier Damage by Cyclic Siloxanes (Silicones)-Using Digital Holographic Microscopy. Int J Mol Sci 2020; 21:ijms21176375. [PMID: 32887477 PMCID: PMC7504040 DOI: 10.3390/ijms21176375] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 08/31/2020] [Indexed: 11/16/2022] Open
Abstract
Cyclic siloxanes (D4, D5, D6) are widely used in skin products. They improve skin sensory properties and alleviate dry skin, but there is still one report (published 2019), which regards their effects on the destruction of the skin barrier, by using fluorescence microscopy and attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR). A new skin-imaging technique, digital holographic microscopy (DHM), was used for the first time to investigate the impact of D4, D5, and D6 on the skin barrier. We observed irreversible damage of the stratum corneum due to the interaction with cyclic siloxanes. These substances changed: (a) the first level of the skin barrier through destabilization of the intercellular lipid lamellae and destruction of the corneocyte structure (measured with axial nanometer resolution), (b) the second level by collapse of not only corneocytes but also of a significant part of the clusters, leading to the loss of the stratum corneum integrity and formation of the lacunae, (c) the third level as an effect of the change in the surface geometrical topography of the stratum corneum and disruption of the integrity of this skin layer, measured with lateral micrometer resolution. DHM allowed also to identify an important pathway for substances to penetrate into the skin through canyons surrounding the clusters. Our investigations provide advanced information for understanding the mechanisms by which various substances pass the skin barrier, including uncontrolled diffusion into the skin.
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Affiliation(s)
- Krystyna Mojsiewicz-Pieńkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, al. gen. Józefa Hallera 107, 80-416 Gdańsk, Poland; (D.K.); (D.B.)
- Correspondence: ; Tel.: +48-58-3491656
| | - Ewa Stachowska
- Department of Metrology and Measurement Systems, Faculty of Mechanical Engineering and Management, Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznan, Poland; (E.S.); (F.M.)
| | - Dominika Krenczkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, al. gen. Józefa Hallera 107, 80-416 Gdańsk, Poland; (D.K.); (D.B.)
| | - Dagmara Bazar
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, al. gen. Józefa Hallera 107, 80-416 Gdańsk, Poland; (D.K.); (D.B.)
| | - Frans Meijer
- Department of Metrology and Measurement Systems, Faculty of Mechanical Engineering and Management, Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznan, Poland; (E.S.); (F.M.)
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45
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Champmartin C, Marquet F, Chedik L, Décret MJ, Aubertin M, Ferrari E, Grandclaude MC, Cosnier F. Human in vitro percutaneous absorption of bisphenol S and bisphenol A: A comparative study. CHEMOSPHERE 2020; 252:126525. [PMID: 32220717 DOI: 10.1016/j.chemosphere.2020.126525] [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: 12/13/2019] [Revised: 02/26/2020] [Accepted: 03/15/2020] [Indexed: 05/23/2023]
Abstract
Bisphenol A (BPA) is widely used in industrial products. Due to the toxicity of this compound, and to comply with restrictions and regulations, manufacturers have progressively replaced it by substitutes. One of the main substitutes used is bisphenol S (BPS). Despite increasing use in many products, the effects of BPS on human health have been little investigated, and studies on percutaneous BPS absorption and particularly toxicokinetic data are lacking. However, the endocrine-disrupting activity of BPA and BPS appears comparable. Dermal contact is a significant source of occupational exposure and is the main route during handling of bisphenol-containing receipts by cashiers. Here, percutaneous BPS absorption was investigated and compared to that of BPA. Experiments were performed according to OECD guidelines. Test compounds dissolved in a vehicle - acetone, artificial sebum or water - were applied in vitro to fresh human skin samples in static Franz diffusion cells. Flux, cumulative absorbed dose and distribution of dose recovered were measured. BPA absorption was vehicle-dependent ranging from 3% with sebum to 41% with water. BPS absorption was much lower than BPA absorption whatever the vehicle tested (less than 1% of applied dose). However, depending on the vehicle 20% to 47% of the applied BPS dose remained in the skin, and was consequently potentially absorbable. Both BPA and BPS were mainly absorbed without biotransformation. Taken together, these results indicate that workers may be exposed to BPS through skin when handling products containing it. This exposure is of concern as its toxicity is currently incompletely understood.
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Affiliation(s)
- Catherine Champmartin
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
| | - Fabrice Marquet
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
| | - Lisa Chedik
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
| | - Marie-Josèphe Décret
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
| | - Matthieu Aubertin
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
| | - Elisabeth Ferrari
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
| | | | - Frédéric Cosnier
- Institut National de Recherche et de Sécurité, Rue du Morvan, CS 60027, 54519, Vandœuvre, Cedex, France.
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Krenczkowska D, Mojsiewicz-Pieńkowska K, Wielgomas B, Bazar D, Jankowski Z. Ex Vivo Human Skin is not a Barrier for Cyclic Siloxanes (Cyclic Silicones): Evidence of Diffusion, Bioaccumulation, and Risk of Dermal Absorption Using a New Validated GC-FID Procedure. Pharmaceutics 2020; 12:E586. [PMID: 32599732 PMCID: PMC7355424 DOI: 10.3390/pharmaceutics12060586] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/14/2020] [Accepted: 06/23/2020] [Indexed: 12/20/2022] Open
Abstract
Cyclic methylsiloxanes D4, D5, D6 (also called cyclic silicones) are widely used in various dermatological products and cosmetics, both for children and adults. As a result of their unique physicochemical properties, the production of cyclic methylsiloxanes has greatly increased over the last few years, which has resulted in increased exposure to mankind. The validated quantitative for gas chromatography-flame ionization detector (GC-FID) analysis with using the transdermal diffusion system with vertical Franz cells demonstrated that ex vivo human skin is not a barrier to cyclic siloxanes. D4, D5, and D6 have a specific affinity to stratum corneum (SC) (especially D6), and can even diffuse into the deeper layers of the skin (epidermis (E) and dermis (D)), or into the receptor fluid as well. An important achievement of this work was the observation of the characteristic ratio partitioning D4, D5, and D6 in skin layers and receptor fluid (RF). The studies have shown that, in order to thoroughly understand the mechanism, it is important to determine not only the differences in the amounts of cumulated doses in total in all skin layers and receptor fluid, but also the mutual ratios of analyte concentrations existing between matrices. For example, in the case of the stratum corneum, the cumulative doses of D4, D5, and D6 were 27.5, 63.9, and 67.2 µg/cm2/24 h, respectively, and in the epidermis, they were 6.9, 29.9, and 10.7 µg/cm2/24 h, respectively, which confirmed the highest affinity of D6 to stratum corneum as the amount diffused into the epidermis was 2.8 times smaller compared to D5. The calculated epidermis-to-stratum corneum ratios of analyte concentrations also confirm this. The largest ratio was identified for D5 (E/SC = 47), followed by D4 (E/SC = 25), and finally by D6 (E/SC = 16). The analysis of the next stage of diffusion from epidermis to dermis revealed that in dermis the highest cumulative dose was observed for D5 (13.9 µg/cm2/24 h), while the doses of D4 and D6 were similar (5.1 and 5.3 µg/cm2/24 h). Considering the concentration gradient, it can be concluded that the diffusion of D5 and D6 occurs at a similar level, while D4 diffuses at a much higher level. These observations were also confirmed by the dermis-to-epidermis concentration ratios. The final stage of diffusion from dermis to the receptor fluid indicated that D4 was able to permeate easily, while D5 exhibited a difficult diffusion and the diffusion of D6 was limited. The receptor fluid-to-dermis concentration ratios (RF/D) were calculated for D4, D5, and D6: 80, 53, and 17, respectively. Our results also revealed the increased risk of D4 and D5 absorption into the blood and lymphatic systems, whereas D6 demonstrated the lowest risk. Therefore, we can argue that, among the three tested compounds, D6 is the safest one that can be used in dermatological, cosmetic, and personal care products. This study demonstrates that the stratum corneum, epidermis, and dermis can be also considered reservoirs of cyclic methylsiloxanes. Therefore, these compounds can demonstrate potential long-term bioaccumulation, and can be absorbed to the bloodstream in a long-term and uncontrolled process.
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Affiliation(s)
- Dominika Krenczkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. J. Gen. Hallera 107, 80-416 Gdańsk, Poland; (D.K.); (D.B.)
| | - Krystyna Mojsiewicz-Pieńkowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. J. Gen. Hallera 107, 80-416 Gdańsk, Poland; (D.K.); (D.B.)
| | - Bartosz Wielgomas
- Department of Toxicology, Faculty of Pharmacy, Medical University of Gdańsk, Al. J. Gen. Hallera 107, 80-416 Gdańsk, Poland;
| | - Dagmara Bazar
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, Al. J. Gen. Hallera 107, 80-416 Gdańsk, Poland; (D.K.); (D.B.)
| | - Zbigniew Jankowski
- Department of Forensic Medicine, Faculty of Medicine, Medical University of Gdańsk, ul. Dębowa 23, 80-204 Gdańsk, Poland;
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Use of Cotton Textiles Coated by Ir(III) Tetrazole Complexes within Ceramic Silica Nanophases for Photo-Induced Self-Marker and Antibacterial Application. NANOMATERIALS 2020; 10:nano10061020. [PMID: 32471044 PMCID: PMC7352244 DOI: 10.3390/nano10061020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/18/2020] [Accepted: 05/22/2020] [Indexed: 01/10/2023]
Abstract
This study was aimed at the production and characterization of coated cotton textiles with luminescent ceramic nanophases doped with cationic Ir(III) tetrazole complexes. We confirmed that SiO2 nanoparticles (NPs) do not affect the phosphorescent properties of the complexes that maintain their emission (610 and 490 nm). For the first time we transferred the luminescence feature from nanosol to textile surface, highlighting the advantages of using nanosilica as an encapsulating and stabilizing matrix. The optimized Ir@SiO2 suspensions were homogenously applied onto the cotton surface by dip-pad-dry-cure technique, as proved by the 2p-fluorescence microscope analysis. Once we verified the self-marker properties of the Ir(III) complex, we observed an excellent washing fastness of the coating with a very limited release. SiO2 in the washing water was quantified at maximum around 1.5 wt% and Ir below the inductively coupled plasma optical emission spectrometry (ICP-OES) detection limit of 1 ppm. A Franz cell test was used to evaluate any possible ex-vivo uptake of Ir@SiO2 nanoparticles across human skin tissues, showing that epidermis and dermis stop over 99% of Ir, implying a reduced impact on human health. The light-induced antimicrobial potential of the Ir@SiO2 were assessed toward both Gram(−) and Gram(+) bacteria. The results encouraged further developments of such functional textiles coated by self-markers and antibacterial active nanophases.
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Modulation of Epidermal Growth Factor Release by Biopolymer-Coated Liposomes. J Pharm Sci 2020; 109:2294-2301. [PMID: 32311369 DOI: 10.1016/j.xphs.2020.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 01/23/2023]
Abstract
This work describes the development of polysaccharide-coated liposomes to modulate the delivery of epidermal growth factor (EGF), with the aim to produce different EGF release profiles depending on the milieu of infected wounds. For this purpose, cationic liposomes were coated with one layer of sodium alginate (ALG) followed by one layer of chitosan (CHI) using the layer-by-layer (LbL) technique. The coated liposomes exhibited apparent hydrodynamic diameters of 278 ± 36 and 216 ± 96 nm for Lip-ALG and Lip-ALG-CHI, respectively. Thus, it appears that adding the CHI layer compacted the Lip-ALG one. The incorporation efficiency of EGF was a maximum of 55% for liposomes with a polymeric coating. In vitro release experiments showed that Lip-ALG-CHI exhibits a higher release rate constant under acidic pH conditions, resembling those of infected tissue. Using an ex vivo model of EGF release in porcine ear skin, these liposomes were found to accumulate in the epidermis. Thus, coated liposomes could represent a local EGF delivery mechanism to promote healing.
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Gelker M, Müller-Goymann CC, Viöl W. Plasma Permeabilization of Human Excised Full-Thickness Skin by µs- and ns-pulsed DBD. Skin Pharmacol Physiol 2020; 33:69-76. [PMID: 31962316 DOI: 10.1159/000505195] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/03/2019] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Cold atmospheric plasma (CAP) is gaining increasing importance as a medical or cosmetic treatment for various indications. The technology is best suited to the treatment of surfaces such as the skin and is already used in wound care and, in exemplary case studies, the reduction of superficial tumors. Several plasma sources have been reported to affect the skin barrier function and potentially enable drug delivery across or into plasma-treated skin. OBJECTIVE In this study, this effect was quantified for different plasma sources in order to elucidate the influence of voltage rise time, pulse duration, and power density in treatments of full-thickness skin. METHODS We compared three different dielectric barrier discharges (DBDs) as to their permeabilization efficiency using Franz diffusion cell permeation experiments and measurements of the transepithelial electrical resistance (TEER) with full-thickness human excised skin. RESULTS We found a significant reduction of the TEER for all three plasma sources. Permeation of the hydrophilic sodium fluorescein molecule was enhanced by a factor of 11.7 (low power) to 41.6 (high power) through µs-pulsed DBD-treated skin. A smaller effect was observed after treatment with the ns-pulsed DBD. CONCLUSIONS The direct treatment of excised human full-thickness skin with CAP, specifically a DBD, can lead to pore formation and enhances transdermal transport of sodium fluorescein.
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Affiliation(s)
- Monika Gelker
- Department of Sciences and Technology, HAWK University of Applied Sciences and Arts, Göttingen, Germany, .,PVZ - Center of Pharmaceutical Engineering, Technische Universität Braunschweig, Braunschweig, Germany,
| | - Christel C Müller-Goymann
- PVZ - Center of Pharmaceutical Engineering, Technische Universität Braunschweig, Braunschweig, Germany.,Institut Pharmazeutische Technologie, Technische Universität Braunschweig, Braunschweig, Germany
| | - Wolfgang Viöl
- Department of Sciences and Technology, HAWK University of Applied Sciences and Arts, Göttingen, Germany
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Imaging and quantifying drug delivery in skin - Part 1: Autoradiography and mass spectrometry imaging. Adv Drug Deliv Rev 2020; 153:137-146. [PMID: 31778729 DOI: 10.1016/j.addr.2019.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 10/21/2019] [Accepted: 11/18/2019] [Indexed: 12/14/2022]
Abstract
In this two-part review we present an up-to-date description of different imaging methods available to map the localization of drugs on skin as a complement of established ex-vivo absorption studies. This first part deals with invasive methods which are grouped in two classes according to their underlying principles: i) methods using radioactivity such as autoradiography and ii) mass spectrometry methods such as MALDI and SIMS. For each method, a description of the principle is given along with example applications of imaging and quantifying drug delivery in human skin. Thanks to these techniques a better assessment of the fate of drugs is obtained: its localization on a particular skin structure, its potential accumulation, etc. A critical comparison in terms of capabilities, sensitivity and practical applicability is included that will help the reader to select the most appropriate technique depending on the particular problem to be solved.
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