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Habib L, Nassif LA, Abboud M, Michael‐Jubeli R, Tfayli A, Lteif R. Noninvasive evaluation of the skin barrier in reconstructed human epidermis using speckle analysis: Correlation with Raman microspectroscopy. Skin Res Technol 2024; 30:e13708. [PMID: 38634247 PMCID: PMC11024505 DOI: 10.1111/srt.13708] [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: 01/09/2024] [Accepted: 04/02/2024] [Indexed: 04/19/2024]
Abstract
BACKGROUND Reconstructed epidermis models, obtained from 3D keratinocytes culture, have gained significant prominence as prototypes for safety and efficacy testing in skin research. To effectively evaluate these models, it is essential to perform molecular and functional characterization. The skin's barrier function is one of the essential aspects of the epidermis that needs to be assessed. A noninvasive method is thus required for the evaluation of the skin barrier in these models. With this perspective, the aim of this feasibility study is to apply the speckle technique for the assessment of the skin barrier in the Reconstructed Human Epidermis (RHE). MATERIALS AND METHODS Speckle analysis as well as Raman microspectroscopy were performed on RHE samples at two maturation days, D17 and D20. RESULTS Between D17 and D20, our study showed an increase in various Raman parameters, including stratum corneum percentage, lateral lipid packing, lipid-to-protein ratio, and protein secondary structure. Furthermore, the degree of light polarization and the speckle grain size also increased over this period. CONCLUSION The speckle technique proved to be effective for evaluating the skin barrier in Reconstructed Human Epidermis (RHE) models. Comparison with Raman validates this approach and provides comprehensive molecular and functional characterization of reconstructive skin models.
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Affiliation(s)
- Léa Habib
- Laboratoire d’étude cinétique en milieu hétérogène (LECH)Faculté des SciencesUniversité Saint JosephBeirutLebanon
- Unité Universitaire Interdisciplinaire Lip(Sys): Lipides, Systèmes analytiques et biologiques, Faculté de pharmacieUniversité Paris‐SaclayOrsayFrance
| | - Léa Abi Nassif
- Physics Department, UR TVA, Faculté des sciencesUniversité Saint JosephBeirutLebanon
| | - Marie Abboud
- Physics Department, UR TVA, Faculté des sciencesUniversité Saint JosephBeirutLebanon
| | - Rime Michael‐Jubeli
- Unité Universitaire Interdisciplinaire Lip(Sys): Lipides, Systèmes analytiques et biologiques, Faculté de pharmacieUniversité Paris‐SaclayOrsayFrance
| | - Ali Tfayli
- Unité Universitaire Interdisciplinaire Lip(Sys): Lipides, Systèmes analytiques et biologiques, Faculté de pharmacieUniversité Paris‐SaclayOrsayFrance
| | - Roger Lteif
- Laboratoire d’étude cinétique en milieu hétérogène (LECH)Faculté des SciencesUniversité Saint JosephBeirutLebanon
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Reynoud N, Geneix N, D'Orlando A, Petit J, Mathurin J, Deniset-Besseau A, Marion D, Rothan C, Lahaye M, Bakan B. Cuticle architecture and mechanical properties: a functional relationship delineated through correlated multimodal imaging. THE NEW PHYTOLOGIST 2023; 238:2033-2046. [PMID: 36869436 DOI: 10.1111/nph.18862] [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: 12/19/2022] [Accepted: 02/27/2023] [Indexed: 05/04/2023]
Abstract
Cuticles are multifunctional hydrophobic biocomposites that protect the aerial organs of plants. During plant development, plant cuticles must accommodate different mechanical constraints combining extensibility and stiffness, and the corresponding relationships with their architecture are unknown. Recent data showed a fine-tuning of cuticle architecture during fruit development, with several chemical clusters which raise the question of how they impact the mechanical properties of cuticles. We investigated the in-depth nanomechanical properties of tomato (Solanum lycopersicum) fruit cuticle from early development to ripening, in relation to chemical and structural heterogeneities by developing a correlative multimodal imaging approach. Unprecedented sharps heterogeneities were evidenced including an in-depth mechanical gradient and a 'soft' central furrow that were maintained throughout the plant development despite the overall increase in elastic modulus. In addition, we demonstrated that these local mechanical areas are correlated to chemical and structural gradients. This study shed light on fine-tuning of mechanical properties of cuticles through the modulation of their architecture, providing new insight for our understanding of structure-function relationships of plant cuticles and for the design of bioinspired material.
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Affiliation(s)
- Nicolas Reynoud
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | - Nathalie Geneix
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | - Angelina D'Orlando
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
- INRAE PROBE Research Infrastructure, BIBS Facility, F-44300, Nantes, France
| | - Johann Petit
- INRAE, Univ. Bordeaux, UMR BFP, F-33140, Villenave d'Ornon, France
| | - Jeremie Mathurin
- Institut de Chimie Physique, UMR8000, Université Paris-Saclay, CNRS, 91405, Orsay, France
| | - Ariane Deniset-Besseau
- Institut de Chimie Physique, UMR8000, Université Paris-Saclay, CNRS, 91405, Orsay, France
| | - Didier Marion
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | | | - Marc Lahaye
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
| | - Bénédicte Bakan
- INRAE, Unité Biopolymères, Interactions, Assemblages, BP71627, 44316, Nantes Cedex3, France
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Nawaz T, Iqbal M, Khan BA, Ahmed N, Nawaz A, Rasul A, Rizg WY, Jali AM, Ahmed RA, Safhi AY. Polycaprolactone based pharmaceutical nanoemulsion loaded with acriflavine: optimization and in vivo burn wound healing activity. Drug Deliv 2022; 29:3233-3244. [DOI: 10.1080/10717544.2022.2136783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Touseef Nawaz
- Drug Delivery and Cosmetic Lab (DDCL), Faculty of Pharmacy, Gomal University, Dera Ismail Khan, Pakistan
| | - Muhammad Iqbal
- Drug Delivery and Cosmetic Lab (DDCL), Faculty of Pharmacy, Gomal University, Dera Ismail Khan, Pakistan
| | - Barkat Ali Khan
- Drug Delivery and Cosmetic Lab (DDCL), Faculty of Pharmacy, Gomal University, Dera Ismail Khan, Pakistan
| | - Naveed Ahmed
- Department of Pharmacy, Quaid-i-Azam University Islamabad, Pakistan
| | - Asif Nawaz
- Drug Delivery and Cosmetic Lab (DDCL), Faculty of Pharmacy, Gomal University, Dera Ismail Khan, Pakistan
| | - Akhtar Rasul
- Department of Pharmaceutics, Government College University, Faisalabad, Pakistan
| | - Waleed Y. Rizg
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Center of Excellence for Drug Research and Pharmaceutical Industries, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdulmajeed M. Jali
- Department of Pharmacology and Toxicology, College of Pharmacy, Jazan, Saudi Arabia
| | - Rayan A. Ahmed
- Department of Pharmacology and Toxicology, College of Pharmacy, Jazan, Saudi Arabia
| | - Awaji Y. Safhi
- Department of Pharmaceutics, College of Pharmacy, Jazan University, Jazan, Saudi Arabia
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Kocsis D, Klang V, Schweiger EM, Varga-Medveczky Z, Mihály A, Pongor C, Révész Z, Somogyi Z, Erdő F. Characterization and ex vivo evaluation of excised skin samples as substitutes for human dermal barrier in pharmaceutical and dermatological studies. Skin Res Technol 2022; 28:664-676. [PMID: 35726964 PMCID: PMC9907592 DOI: 10.1111/srt.13165] [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: 11/09/2021] [Accepted: 05/03/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Excised animal and human skins are frequently used in permeability testing in pharmaceutical research. Several factors exist that may have influence on the results. In the current study some of the skin parameters that may affect drug permeability were analysed for human, mouse, rat and pig skin. MATERIALS AND METHODS Classic biophysical skin parameters were measured (e.g. pH, hydration, permittivity, transepidermal water loss). Physiological characteristics of the skins were also analysed by confocal Raman spectroscopy, scanning electron microscopy and two-photon microscopy. RESULTS Based on biophysical testing, skin barrier function was damaged in psoriatic mouse skin and in marketed pig skin. Hydration and pH values were similar among the species, but freezing and thawing reduced the water content of the skins and shifted the surface pH to acidic. Aging reduced hydration and permittivity, resulting in impaired barrier function. Mechanical sensitization used in permeability studies resulted in proportional thinning of dead epidermis. DISCUSSION Results indicate that depending on the scientific question it should be considered whether fresh or frozen tissue is used, and for certain purposes rodent skins are well usable. The structure of the skin tissue (ceramide, cholesterol, keratin, natural moisturizing factor or urea) is similar in rats and mice, but due to the higher skin thickness the lipid distribution is different in porcine skin. Psoriasis led to irregular chemical composition of the skin. CONCLUSION A comprehensive evaluation of skin samples of four species was performed. The biophysical and microscopic observations should be considered when selecting drug penetration models and experimental conditions.
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Affiliation(s)
- Dorottya Kocsis
- Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary
| | - Victoria Klang
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Technology and Biopharmaceutics, Faculty of Life Sciences, University of Vienna, Vienna, Austria
| | - Eva-Maria Schweiger
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Technology and Biopharmaceutics, Faculty of Life Sciences, University of Vienna, Vienna, Austria
| | - Zsófia Varga-Medveczky
- Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary
| | - Anna Mihály
- Institute of Experimental Medicine, H-1094, Budapest, Hungary
| | - Csaba Pongor
- Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary
| | | | - Zoltán Somogyi
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary
| | - Franciska Erdő
- Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary
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Ultrasonic microrheology for ex vivo skin explants monitoring: A proof of concept. Biosens Bioelectron 2022; 198:113831. [PMID: 34864245 DOI: 10.1016/j.bios.2021.113831] [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: 07/08/2021] [Revised: 10/13/2021] [Accepted: 11/19/2021] [Indexed: 11/20/2022]
Abstract
As an answer to alternative non-animal testing, biosensors dedicated to the ex vivo skin explants monitoring are a challenge to study physiological-like behavior and optimize new topical products. Because of the skin viscoelastic behavior, mechanical tests are commonly based on macroscopic measurement and give global descriptors of its state. Other techniques, including photoacoustic ones, are more focused on the molecular scale. There is a gap to fill in the mesoscopic range to get information about the microstructure of the skin. This article presents the proof-of-concept of a biosensor coupling a thickness shear-mode transducer with human skin explants kept in life-like state for a week. Thanks to a multifrequency analysis of the transducer impedance, this biosensor is able to monitor the viscoelastic properties of the skin. To extract the complex shear modulus and the microstructural evolutions, a mechanical model based on fractional calculus is used. As a preliminary results, the sensitivity of the sensor to probe the skin viscoelasticity in lifelike state and the impact of its culture medium are presented. A suitable microstructural coefficient is also extracted in order to identify mechanical breaches in the skin barrier after the application of peeling products.
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Sherlock B, Chen J, Mansfield J, Green E, Winlove C. Biophotonic tools for probing extracellular matrix mechanics. Matrix Biol Plus 2021; 12:100093. [PMID: 34934939 PMCID: PMC8661043 DOI: 10.1016/j.mbplus.2021.100093] [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: 07/30/2021] [Revised: 11/07/2021] [Accepted: 11/11/2021] [Indexed: 12/11/2022] Open
Abstract
The complex, hierarchical and heterogeneous biomechanics of the extracellular matrix (ECM) are central to the health of multicellular organisms. Characterising the distribution, dynamics and above all else origins of ECM biomechanics are challenges that have captivated researchers for decades. Recently, a suite of biophotonics techniques have emerged as powerful new tools to investigate ECM biomechanics. In this mini-review, we discuss how the non-destructive, sub-micron resolution imaging capabilities of Raman spectroscopy and nonlinear microscopy are being used to interrogate the biomechanics of thick, living tissues. These high speed, label-free techniques are implemented during mechanical testing, providing unprecedented insight into the compositional and structural response of the ECM to changes in the mechanical environment.
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Affiliation(s)
- B.E. Sherlock
- College of Medicine and Health, University of Exeter, Exeter EX1 2LU, United Kingdom
| | - J. Chen
- College of Engineering, Mathematical and Physical Sciences, University of Exeter, Exeter EX4 4QF, United Kingdom
| | - J.C. Mansfield
- College of Engineering, Mathematical and Physical Sciences, University of Exeter, Exeter EX4 4QF, United Kingdom
| | - E. Green
- College of Engineering, Mathematical and Physical Sciences, University of Exeter, Exeter EX4 4QF, United Kingdom
| | - C.P. Winlove
- College of Engineering, Mathematical and Physical Sciences, University of Exeter, Exeter EX4 4QF, United Kingdom
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