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Kichou H, Bonnier F, Caritá AC, Byrne HJ, Chourpa I, Munnier E. Confocal Raman spectroscopy coupled with in vitro permeation testing to study the effects of formalin fixation on the skin barrier function of reconstructed human epidermis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 320:124617. [PMID: 38870697 DOI: 10.1016/j.saa.2024.124617] [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: 04/03/2024] [Revised: 05/27/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
Confocal Raman Spectroscopy is recognised as a potent tool for molecular characterisation of biological specimens. There is a growing demand for In Vitro Permeation Tests (IVPT) in the pharmaceutical and cosmetic areas, increasingly conducted using Reconstructed Human Epidermis (RHE) skin models. In this study, chemical fixation of RHE in 10 % Neutral Buffered Formalin for 24 h has been examined for storing RHE samples at 4 °C for up to 21 days. Confocal Raman Spectroscopy (CRS), combined with Principal Components Analysis, revealed the molecular-level effects of fixation, notably in protein and lipid conformation within the stratum corneum and viable epidermis. IVPT by means of high-performance liquid chromatography, using caffeine as a model compound, showed minimal impact of formalin fixation on the cumulative amount, flux, and permeability coefficient after 12 h. While the biochemical architecture is altered, the function of the model as a barrier to maintain rate-limiting diffusion of active molecules within skin layers remains intact. This study opens avenues for enhanced flexibility and utility in skin model research, promising insights into mitigating the limited shelf life of RHE models by preserving performance in fixed samples for up to 21 days.
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Affiliation(s)
- Hichem Kichou
- UPR CNRS 4301 CBM, Département NMNS « NanoMédicaments et NanoSondes », Université de Tours, 31 Avenue Monge, 37200 Tours, France
| | - Franck Bonnier
- LVMH Recherche, 185 Av. de Verdun, 45800, Saint-Jean-de-Braye, France
| | - Amanda C Caritá
- UPR CNRS 4301 CBM, Département NMNS « NanoMédicaments et NanoSondes », Université de Tours, 31 Avenue Monge, 37200 Tours, France
| | - Hugh J Byrne
- FOCAS Research Institute, TU Dublin, City Campus, Camden Row, Dublin 8, D08 CKP1, Ireland
| | - Igor Chourpa
- UPR CNRS 4301 CBM, Département NMNS « NanoMédicaments et NanoSondes », Université de Tours, 31 Avenue Monge, 37200 Tours, France
| | - Emilie Munnier
- UPR CNRS 4301 CBM, Département NMNS « NanoMédicaments et NanoSondes », Université de Tours, 31 Avenue Monge, 37200 Tours, France.
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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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Kichou H, Bonnier F, Dancik Y, Bakar J, Michael-Jubeli R, Caritá AC, Perse X, Soucé M, Rapetti L, Tfayli A, Chourpa I, Munnier E. Strat-M® positioning for skin permeation studies: A comparative study including EpiSkin® RHE, and human skin. Int J Pharm 2023; 647:123488. [PMID: 37805151 DOI: 10.1016/j.ijpharm.2023.123488] [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: 07/04/2023] [Revised: 09/25/2023] [Accepted: 10/04/2023] [Indexed: 10/09/2023]
Abstract
In the development and optimization of dermatological products, In Vitro Permeation Testing (IVPT) is pivotal for controlled study of skin penetration. To enhance standardization and replicate human skin properties reconstructed human skin and synthetic membranes are explored as alternatives. Strat-M® is a membrane designed to mimic the multi-layered structure of human skin for IVPT. For instance, in Strat-M®, the steady-state fluxes (JSS) of resorcinol in formulations free of permeation enhancers were found to be 41 ± 5 µg/cm2·h for the aqueous solution, 42 ± 6 µg/cm2·h for the hydrogel, and 40 ± 6 µg/cm2·h for the oil-in-water emulsion. These results were closer to excised human skin (5 ± 3, 9 ± 2, 13 ± 6 µg/cm2·h) and surpassed the performance of EpiSkin® RHE (138 ± 5, 142 ± 6, and 162 ± 11 µg/cm2·h). While mass spectrometry and Raman microscopy demonstrated the qualitative molecular similarity of EpiSkin® RHE to human skin, it was the porous and hydrophobic polymer nature of Strat-M® that more faithfully reproduced the skin's diffusion-limiting barrier. Further validation through similarity factor analysis (∼80-85%) underscored Strat-M®'s significance as a reliable substitute for human skin, offering a promising approach to enhance realism and reproducibility in dermatological product development.
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Affiliation(s)
- Hichem Kichou
- Université de Tours, EA 6295 Nanomédicaments et Nanosondes, Faculté de Pharmacie, 31 Avenue Monge, 37200 Tours, France
| | - Franck Bonnier
- LVMH Recherche, 185 Av. de Verdun, 45800 Saint-Jean-de-Braye, France
| | - Yuri Dancik
- Certara UK Ltd., Simcyp Division, Level 2-Acero, 1 Concourse Way, Sheffield S1 2B1, UK
| | - Joudi Bakar
- Université Paris-Saclay, Faculté de Pharmacie, Lip(sys)(2) « Lipides, Systèmes Analytiques et Biologiques », 17 avenue des sciences, 91400 Orsay, France
| | - Rime Michael-Jubeli
- Université Paris-Saclay, Faculté de Pharmacie, Lip(sys)(2) « Lipides, Systèmes Analytiques et Biologiques », 17 avenue des sciences, 91400 Orsay, France
| | - Amanda C Caritá
- Université de Tours, EA 6295 Nanomédicaments et Nanosondes, Faculté de Pharmacie, 31 Avenue Monge, 37200 Tours, France
| | - Xavier Perse
- Université de Tours, EA 6295 Nanomédicaments et Nanosondes, Faculté de Pharmacie, 31 Avenue Monge, 37200 Tours, France
| | - Martin Soucé
- Université de Tours, EA 6295 Nanomédicaments et Nanosondes, Faculté de Pharmacie, 31 Avenue Monge, 37200 Tours, France
| | - Laetitia Rapetti
- Alphenyx, 430 avenue du Maréchal Lattre de Tassigny, 13009 Marseille, France
| | - Ali Tfayli
- Université Paris-Saclay, Faculté de Pharmacie, Lip(sys)(2) « Lipides, Systèmes Analytiques et Biologiques », 17 avenue des sciences, 91400 Orsay, France
| | - Igor Chourpa
- Université de Tours, EA 6295 Nanomédicaments et Nanosondes, Faculté de Pharmacie, 31 Avenue Monge, 37200 Tours, France
| | - Emilie Munnier
- Université de Tours, EA 6295 Nanomédicaments et Nanosondes, Faculté de Pharmacie, 31 Avenue Monge, 37200 Tours, France.
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Zhang Y, Gong S, Liu L, Shen H, Liu E, Pan L, Gao N, Chen R, Huang Y. Cyclodextrin-Coordinated Liposome-in-Gel for Transcutaneous Quercetin Delivery for Psoriasis Treatment. ACS APPLIED MATERIALS & INTERFACES 2023; 15:40228-40240. [PMID: 37584330 DOI: 10.1021/acsami.3c07582] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
Psoriasis is a chronic inflammatory skin disease that is difficult to treat. Quercetin (QT) is a dietary flavonoid known for its anti-inflammatory effects and safe use in humans. However, the topical application of quercetin for psoriasis treatment presents a significant challenge due to its poor water solubility and low stability in semisolid preparations, where it tends to recrystallize. This work presents a novel liposome-in-gel formulation for the quercetin-based topical treatment of psoriasis. The quercetin-loading liposomes are stabilized by hydroxypropyl-β-cyclodextrin (HPCD), which interacts with phospholipids via hydrogen bonding to form a layer of an HPCD coating on the liposome interface, thus resulting in improved stability. Various analytical techniques, such as FTIR spectroscopy, Raman spectroscopy, and TEM, were used to characterize the molecular coordination patterns between cyclodextrin and liposomes. The results demonstrated that HPCD assisted the liposomes in interfacing with the matrix lipids and keratins of the stratum corneum, thereby enhancing skin permeability and promoting drug penetration and retention in the skin. The in vivo results showed that the topical QT HPCD-liposome-in-gel improved the treatment efficacy of psoriatic plaque compared to free QT. It alleviated the symptoms of skin thickening and downregulated proinflammatory cytokines, including TNF-α, IL-17A, and IL-1β. The results suggested that the HPCD-coordinated liposome-in-gel system could be a stable carrier for topical QT therapy with good potential in psoriasis treatment.
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Affiliation(s)
- Yuqin Zhang
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- School of Pharmacy, Zunyi Medical University, Zunyi 563003, China
| | - Shuqing Gong
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- School of Pharmacy, Zunyi Medical University, Zunyi 563003, China
| | - Lin Liu
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Huan Shen
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients, Shanghai 201203, China
| | - Ergang Liu
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Li Pan
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- School of Pharmacy, Zunyi Medical University, Zunyi 563003, China
| | - Nan Gao
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- School of Pharmacy, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Rongli Chen
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Yongzhuo Huang
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
- School of Pharmacy, Zunyi Medical University, Zunyi 563003, China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients, Shanghai 201203, China
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Fernández-Galiana Á, Bibikova O, Vilms Pedersen S, Stevens MM. Fundamentals and Applications of Raman-Based Techniques for the Design and Development of Active Biomedical Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2210807. [PMID: 37001970 DOI: 10.1002/adma.202210807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/03/2023] [Indexed: 06/19/2023]
Abstract
Raman spectroscopy is an analytical method based on light-matter interactions that can interrogate the vibrational modes of matter and provide representative molecular fingerprints. Mediated by its label-free, non-invasive nature, and high molecular specificity, Raman-based techniques have become ubiquitous tools for in situ characterization of materials. This review comprehensively describes the theoretical and practical background of Raman spectroscopy and its advanced variants. The numerous facets of material characterization that Raman scattering can reveal, including biomolecular identification, solid-to-solid phase transitions, and spatial mapping of biomolecular species in bioactive materials, are highlighted. The review illustrates the potential of these techniques in the context of active biomedical material design and development by highlighting representative studies from the literature. These studies cover the use of Raman spectroscopy for the characterization of both natural and synthetic biomaterials, including engineered tissue constructs, biopolymer systems, ceramics, and nanoparticle formulations, among others. To increase the accessibility and adoption of these techniques, the present review also provides the reader with practical recommendations on the integration of Raman techniques into the experimental laboratory toolbox. Finally, perspectives on how recent developments in plasmon- and coherently-enhanced Raman spectroscopy can propel Raman from underutilized to critical for biomaterial development are provided.
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Affiliation(s)
- Álvaro Fernández-Galiana
- Department of Materials, Department of Bioengineering, Imperial College London, SW7 2AZ, London, UK
| | - Olga Bibikova
- Department of Materials, Department of Bioengineering, Imperial College London, SW7 2AZ, London, UK
| | - Simon Vilms Pedersen
- Department of Materials, Department of Bioengineering, Imperial College London, SW7 2AZ, London, UK
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering, Imperial College London, SW7 2AZ, London, UK
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Lunter D, Klang V, Kocsis D, Varga-Medveczky Z, Berkó S, Erdő F. Novel aspects of Raman spectroscopy in skin research. Exp Dermatol 2022; 31:1311-1329. [PMID: 35837832 PMCID: PMC9545633 DOI: 10.1111/exd.14645] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/07/2022] [Accepted: 07/12/2022] [Indexed: 11/27/2022]
Abstract
The analytical technology of Raman spectroscopy has an almost 100‐year history. During this period, many modifications and developments happened in the method like discovery of laser, improvements in optical elements and sensitivity of spectrometer and also more advanced light detection systems. Many types of the innovative techniques appeared (e.g. Transmittance Raman spectroscopy, Coherent Raman Scattering microscopy, Surface‐Enhanced Raman scattering and Confocal Raman spectroscopy/microscopy). This review article gives a short description about these different Raman techniques and their possible applications. Then, a short statistical part is coming about the appearance of Raman spectroscopy in the scientific literature from the beginnings to these days. The third part of the paper shows the main application options of the technique (especially confocal Raman spectroscopy) in skin research, including skin composition analysis, drug penetration monitoring and analysis, diagnostic utilizations in dermatology and cosmeto‐scientific applications. At the end, the possible role of artificial intelligence in Raman data analysis and the regulatory aspect of these techniques in dermatology are briefly summarized. For the future of Raman Spectroscopy, increasing clinical relevance and in vivo applications can be predicted with spreading of non‐destructive methods and appearance with the most advanced instruments with rapid analysis time.
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Affiliation(s)
- Dominique Lunter
- University of Tübingen, Department of Pharmaceutical Technology, Institute of Pharmacy and Biochemistry, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Victoria Klang
- University of Vienna, Department of Pharmaceutical Sciences, Division of Pharmaceutical Technology and Biopharmaceutics, Faculty of Life Sciences, Vienna, Austria
| | - Dorottya Kocsis
- Pázmány Péter Catholic University, Faculty of Information Technology and Bionics, Budapest, Hungary
| | - Zsófia Varga-Medveczky
- Pázmány Péter Catholic University, Faculty of Information Technology and Bionics, Budapest, Hungary
| | - Szilvia Berkó
- University of Szeged, Faculty of Pharmacy, Institute of Pharmaceutical Technology and Regulatory Affairs, Szeged, Hungary
| | - Franciska Erdő
- Pázmány Péter Catholic University, Faculty of Information Technology and Bionics, Budapest, Hungary.,University of Tours EA 6295 Nanomédicaments et Nanosondes, Tours, France
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7
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Estimating the Analytical Performance of Raman Spectroscopy for Quantification of Active Ingredients in Human Stratum Corneum. Molecules 2022; 27:molecules27092843. [PMID: 35566190 PMCID: PMC9105701 DOI: 10.3390/molecules27092843] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 01/16/2023] Open
Abstract
Confocal Raman microscopy (CRM) has become a versatile technique that can be applied routinely to monitor skin penetration of active molecules. In the present study, CRM coupled to multivariate analysis (namely PLSR—partial least squares regression) is used for the quantitative measurement of an active ingredient (AI) applied to isolated (ex vivo) human stratum corneum (SC), using systematically varied doses of resorcinol, as model compound, and the performance is quantified according to key figures of merit defined by regulatory bodies (ICH, FDA, and EMA). A methodology is thus demonstrated to establish the limit of detection (LOD), precision, accuracy, sensitivity (SEN), and selectivity (SEL) of the technique, and the performance according to these key figures of merit is compared to that of similar established methodologies, based on studies available in literature. First, principal components analysis (PCA) was used to examine the variability within the spectral data set collected. Second, ratios calculated from the area under the curve (AUC) of characteristic resorcinol and proteins/lipids bands (1400–1500 cm−1) were used to perform linear regression analysis of the Raman spectra. Third, cross-validated PLSR analysis was applied to perform quantitative analysis in the fingerprint region. The AUC results show clearly that the intensities of Raman features in the spectra collected are linearly correlated to resorcinol concentrations in the SC (R2 = 0.999) despite a heterogeneity in the distribution of the active molecule in the samples. The Root Mean Square Error of Cross-Validation (RMSECV) (0.017 mg resorcinol/mg SC), The Root Mean Square of Prediction (RMSEP) (0.015 mg resorcinol/mg SC), and R2 (0.971) demonstrate the reliability of the linear regression constructed, enabling accurate quantification of resorcinol. Furthermore, the results have enabled the determination, for the first time, of numerical criteria to estimate analytical performances of CRM, including LOD, precision using bias corrected mean square error prediction (BCMSEP), sensitivity, and selectivity, for quantification of the performance of the analytical technique. This is one step further towards demonstrating that Raman spectroscopy complies with international guidelines and to establishing the technique as a reference and approved tool for permeation studies.
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The effects of bismuth oxide nanoparticles and cisplatin on MCF-7 breast cancer cells irradiated with Ir-192 High Dose Rate brachytherapy. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2022. [DOI: 10.1016/j.jrras.2022.01.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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9
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Collagen orientation probed by polarized Raman spectra can serve as differential diagnosis indicator between different grades of meniscus degeneration. Sci Rep 2021; 11:20299. [PMID: 34645874 PMCID: PMC8514572 DOI: 10.1038/s41598-021-99569-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 08/19/2021] [Indexed: 11/08/2022] Open
Abstract
The purpose of the present study was to analyze normal and degenerated menisci with Raman methodology on thin sections of formalin fixed paraffin embedding tissues and to correlate the Raman findings with the grade of meniscus degeneration. Menisci (n = 27) were removed from human knee joints after total knee replacement or meniscectomy. Following routine histopathological analysis to determine the grade of meniscal lesions obtained from healthy and degenerated formaline fixed paraffin embedded (FFPE) meniscal sections, Raman polarization approach was applied to evaluate the orientation of collagen fibrils in different levels of the same 5 μm thick FFPE meniscal tissue sections, used for histopathological assessment. We collected Raman spectra in two different polarization geometries, v-HH and v-VV, and calculated the mean value of the v-HH/v-VV intensity ratio of two Raman bands, sensitive and non-sensitive to the molecular orientation. The collagen specific amide I band at 1665 cm-1, has the higher sensitivity dependence on the Raman polarization. The mean values of ratio v-HH/v-VV of the 1665 cm-1 peak intensity was significantly higher in healthy, mean ± SD: 2.56 ± 0.46, compared to degenerated menisci, mean ± SD: 1.85 ± 0.42 (p = 0.0014). The mean values of v-HH/v-VV intensity ratio were 2.18 and 1.50 for low and high degenerated menisci, respectively (p < 0.0001). The difference of peak intensities in the two laser polarizations is decreased in the degenerated meniscus; this difference is diminishing as the degeneration increases. The v-HH/v-VV ratio was also of significant difference in low as compared to control and high grade meniscus lesions (p = 0.036 and p < 0.0001, respectively) offering valuable information for the approach of its biology and function. In the present study we showed that the 5 μm thick sections can be used for Raman analysis of meniscal tissue with great reliability, in terms of sensitivity, specificity, false-negative and false-positive results. Our data introduce the interesting hypothesis that compact portable Raman microscopy on tissue sections can be used intra-operatively for fast diagnosis and hence, accurate procedure design in the operating room.
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10
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Assessment of Skin Deep Layer Biochemical Profile Using Spatially Offset Raman Spectroscopy. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11209498] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Skin cancer is currently the most common type of cancer with millions of cases diagnosed worldwide yearly. The current gold standard for clinical diagnosis of skin cancer is an invasive and relatively time-consuming procedure, consisting of visual examination followed by biopsy collection and histopathological analysis. Raman spectroscopy has been shown to efficiently aid the non-invasive diagnosis of skin cancer when probing the surface of the skin. In this study, we employ a recent development of Raman spectroscopy (Spatially Offset Raman Spectroscopy, SORS) which is able to look deeper in tissue and create a deep layer biochemical profile of the skin in areas where cancer lesions subtly evolve. After optimizing the measurement parameters on skin tissue phantoms, we then adopted SORS on human skin tissue from different anatomical areas to investigate the contribution of the different skin layers to the recorded Raman signal. Our results show that using a diffuse beam with zero offset to probe a sampling volume where the lesion is typically included (surface to epidermis-dermis junction), provides the optimum signal-to-noise ratio (SNR) and may be employed in future skin cancer screening applications.
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11
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Imoto T, Goto M. Self-Assembled Palmitoyl-Glycine-Histidine as a Permeation Enhancer for Transdermal Delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8971-8977. [PMID: 34242506 DOI: 10.1021/acs.langmuir.1c00889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The stratum corneum (SC) covers the outer surface of the skin and prevents the permeation of unwanted materials; however, the SC barrier also inhibits the desired permeation of active pharmaceutical ingredients (APIs). Therefore, the development of a novel method to enhance the permeation of APIs through the skin has been the focus of significant attention. Palmitoyl-glycine-histidine (Pal-GH)-comprising palmitic acid, glycine, and histidine-can be co-assembled with various additives to form a thixotropic hydrogel. Self-assembled Pal-GH enhances the permeation of ivermectin through the skin; however, the permeation mechanism is unclear and has not yet been discussed in detail. In the present study, the self-assembled structure of Pal-GH was analyzed using X-rays and infrared, and its permeation enhancement effect was verified. There was a correlation between the amount of Pal-GH in the skin and permeation enhancement, suggesting the involvement of the Pal-GH molecule. The presence of Pal-GH in the skin was confirmed by liquid chromatography-mass spectrometry and fluorescence labeling (labeling with Thioflavin T, a fluorescent dye that responds to β-sheets). The self-assembled Pal-GH permeated the SC without disrupting its organization. However, the structure of the Pal-GH caused changes to the lipid organization of the SC. The findings indicated that self-assembled Pal-GH is an effective permeation enhancer for transdermal delivery and does not induce skin irritation.
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Affiliation(s)
- Takayuki Imoto
- Nissan Chemical Corporation, Tokyo 103-6119, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Center for Advanced Transdermal Drug Delivery System Center, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
- Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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12
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Lopez-Gonzalez U, Casey A, Byrne HJ. Biochemical impact of solar radiation exposure on human keratinocytes monitored by Raman spectroscopy; effects of cell culture environment. JOURNAL OF BIOPHOTONICS 2021; 14:e202100058. [PMID: 33871950 DOI: 10.1002/jbio.202100058] [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: 02/16/2021] [Revised: 03/27/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Understanding and amelioration of the effects of solar radiation exposure are critical in preventing the occurrence of skin cancer. Towards this end, many studies have been conducted in 2D cell culture models under simplified and unrealistic conditions. 3D culture models better capture the complexity of in vivo physiology, although the effects of the 3D extracellular matrix have not been well studied. Monitoring the instantaneous and resultant cellular responses to exposure, and the influence of the 3D environment, could provide an enhanced understanding of the fundamental processes of photocarcinogenesis. This work presents an analysis of the biochemical impacts of simulated solar radiation (SSR) occurring in immortalised human epithelial keratinocytes (HaCaT), in a 3D skin model, compared to 2D culture. Cell viability was monitored using the Alamar Blue colorimetric assay (AB), and the impact of the radiation exposure, at the level of the biomolecular constituents (nucleic acids and proteins), were evaluated through the combination of Raman microspectroscopy and multivariate statistical analysis. The results suggest that SSR exposure induces alterations of the conformational structure of DNA as an immediate impact, whereas changes in the protein signature are primarily seen as a subsequent response.
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Affiliation(s)
- Ulises Lopez-Gonzalez
- School of Physics, Nanolab Research Center, FOCAS Research Institute, Technological University Dublin, Dublin, Ireland
| | - Alan Casey
- School of Physics, Nanolab Research Center, FOCAS Research Institute, Technological University Dublin, Dublin, Ireland
| | - Hugh J Byrne
- FOCAS Research Institute, Technological University Dublin, Dublin, Ireland
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13
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Deiringer N, Haase C, Wieland K, Zahler S, Haisch C, Friess W. Finding the Needle in the Haystack: High-Resolution Techniques for Characterization of Mixed Protein Particles Containing Shed Silicone Rubber Particles Generated During Pumping. J Pharm Sci 2020; 110:2093-2104. [PMID: 33307040 DOI: 10.1016/j.xphs.2020.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/19/2020] [Accepted: 12/02/2020] [Indexed: 12/29/2022]
Abstract
During the manufacturing process of biopharmaceuticals, peristaltic pumps are employed at different stages for transferring and dosing of the final product. Commonly used silicone tubings are known for particle shedding from the inner tubing surface due to friction in the pump head. These nanometer sized silicone rubber particles could interfere with proteins. Until now, only mixed protein particles containing micrometer-sized contaminations such as silicone oil have been characterized, detected, and quantified. To overcome the detection limits in particle sizes of contaminants, this study aimed for the definite identification of protein particles containing nanometer sized silicone particles in qualitative and quantitative manner. The mixed particles consisted of silicone rubber particles either coated with a protein monolayer or embedded into protein aggregates. Confocal Raman microscopy allows label free chemical identification of components and 3D particle imaging. Labeling the tubing enables high-resolution imaging via confocal laser scanning microscopy and counting of mixed particles via Imaging Flow Cytometry. Overall, these methods allow the detection and identification of particles of unknown origin and composition and could be a forensic tool for solving problems with contaminations during processing of biopharmaceuticals.
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Affiliation(s)
- Natalie Deiringer
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christian Haase
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Karin Wieland
- Chair for Analytical Chemistry, Technische Universität München, Munich, Germany
| | - Stefan Zahler
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christoph Haisch
- Chair for Analytical Chemistry, Technische Universität München, Munich, Germany
| | - Wolfgang Friess
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-Universität München, Munich, Germany.
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14
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Dancik Y, Kichou H, Eklouh-Molinier C, Soucé M, Munnier E, Chourpa I, Bonnier F. Freezing Weakens the Barrier Function of Reconstructed Human Epidermis as Evidenced by Raman Spectroscopy and Percutaneous Permeation. Pharmaceutics 2020; 12:E1041. [PMID: 33143093 PMCID: PMC7694161 DOI: 10.3390/pharmaceutics12111041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/20/2020] [Accepted: 10/28/2020] [Indexed: 12/23/2022] Open
Abstract
The development and characterization of reconstructed human epidermis (RHE) is an active area of R&D. RHE can replace animal tissues in pharmaceutical, toxicological and cosmetic sciences, yielding scientific and ethical advantages. RHEs remain costly, however, due to consumables and time required for their culture and a short shelf-life. Storing, i.e., freezing RHE could help reduce costs but to date, little is known on the effects of freezing on the barrier function of RHE. We studied such effects using commercial EpiSkin™ RHE stored at -20, -80 and -150 °C for 1 and 10 weeks. We acquired intrinsic Raman spectra in the stratum corneum (SC) of the RHEs as well as spectra obtained following topical application of resorcinol in an aqueous solution. In parallel, we quantified the effects of freezing on the permeation kinetics of resorcinol from time-dependent permeation experiments. Principal component analyses discriminated the intrinsic SC spectra and the spectra of resorcinol-containing RHEs, in each case on the basis of the freezing conditions. Permeation of resorcinol through the frozen RHE increased 3- to 6-fold compared to fresh RHE, with the strongest effect obtained from freezing at -20 °C for 10 weeks. Due to the extensive optimization and standardization of EpiSkin™ RHE, the effects observed in our work may be expected to be more pronounced with other RHEs.
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Affiliation(s)
- Yuri Dancik
- Le STUDIUM Institute of Advanced Studies, 1 rue Dupanloup, 45000 Orléans, France
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
| | - Hichem Kichou
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
| | - Christophe Eklouh-Molinier
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
| | - Martin Soucé
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
| | - Emilie Munnier
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
| | - Igor Chourpa
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
| | - Franck Bonnier
- Faculté de Pharmacie, Université de Tours, 31 Avenue Monge, EA 6295 NanoMédicaments et NanoSondes, 37200 Tours, France; (H.K.); (C.E.-M.); (M.S.); (E.M.); (I.C.)
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15
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Zhou H, Simmons CS, Sarntinoranont M, Subhash G. Raman Spectroscopy Methods to Characterize the Mechanical Response of Soft Biomaterials. Biomacromolecules 2020; 21:3485-3497. [PMID: 32833438 DOI: 10.1021/acs.biomac.0c00818] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Raman spectroscopy has been used extensively to characterize the influence of mechanical deformation on microstructure changes in biomaterials. While traditional piezo-spectroscopy has been successful in assessing internal stresses of hard biomaterials by tracking prominent peak shifts, peak shifts due to applied loads are near or below the resolution limit of the spectrometer for soft biomaterials with moduli in the kilo- to mega-Pascal range. In this Review, in addition to peak shifts, other spectral features (e.g., polarized intensity and intensity ratio) that provide quantitative assessments of microstructural orientation and secondary structure in soft biomaterials and their strain dependence are discussed. We provide specific examples for each method and classify sensitive Raman characteristic bands common across natural (e.g., soft tissue) and synthetic (e.g., polymeric scaffolds) soft biomaterials upon mechanical deformation. This Review can provide guidance for researchers aiming to analyze micromechanics of soft tissues and engineered tissue constructs by Raman spectroscopy.
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Affiliation(s)
- Hui Zhou
- Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Chelsey S Simmons
- Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Malisa Sarntinoranont
- Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Ghatu Subhash
- Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States
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16
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What is the fate of multi-lamellar liposomes of controlled size, charge and elasticity in artificial and animal skin? Eur J Pharm Biopharm 2020; 151:18-31. [DOI: 10.1016/j.ejpb.2020.03.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/17/2020] [Accepted: 03/22/2020] [Indexed: 11/21/2022]
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17
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Fatima A, Cyril G, Vincent V, Stéphane J, Olivier P. Towards normalization selection of Raman data in the context of protein glycation: application of validity indices to PCA processed spectra. Analyst 2020; 145:2945-2957. [DOI: 10.1039/c9an02155h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vibrational data of biological samples require appropriate pre-processing for ensuring relevant interpretation. Here, mathematical criteria (validity indices) are used to select how to normalize Raman data collected in the protein glycation context.
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Affiliation(s)
- Alsamad Fatima
- BioSpecT EA n°7506
- Laboratory of Translational Biospectroscopy
- UFR – Pharmacie
- Université de Reims Champagne-Ardenne
- France
| | - Gobinet Cyril
- BioSpecT EA n°7506
- Laboratory of Translational Biospectroscopy
- UFR – Pharmacie
- Université de Reims Champagne-Ardenne
- France
| | - Vuiblet Vincent
- BioSpecT EA n°7506
- Laboratory of Translational Biospectroscopy
- UFR – Pharmacie
- Université de Reims Champagne-Ardenne
- France
| | - Jaisson Stéphane
- MEDyC UMR CNRS/URCA n°7369
- Laboratory of Biochemistry and Molecular Biology
- Faculty of Medicine
- University of Reims Champagne-Ardenne
- Reims
| | - Piot Olivier
- BioSpecT EA n°7506
- Laboratory of Translational Biospectroscopy
- UFR – Pharmacie
- Université de Reims Champagne-Ardenne
- France
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18
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Albrecht S, Elpelt A, Kasim C, Reble C, Mundhenk L, Pischon H, Hedtrich S, Witzel C, Lademann J, Zastrow L, Beckers I, Meinke MC. Quantification and characterization of radical production in human, animal and 3D skin models during sun irradiation measured by EPR spectroscopy. Free Radic Biol Med 2019; 131:299-308. [PMID: 30576782 DOI: 10.1016/j.freeradbiomed.2018.12.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 12/17/2018] [Accepted: 12/17/2018] [Indexed: 11/20/2022]
Abstract
Sun radiation is indispensable to our health, however, a long term and high exposure could lead to erythema, premature skin aging and promotion of skin tumors. An underlying pathomechanism is the formation of free radicals. First, reactive oxygen species (*OH, *O2-) and then, secondary lipid oxygen species (C centered radicals, CCR) are formed. A high amount of free radicals results in oxidative stress with subsequent cell damage. In dermatological research different skin models are used, however, comparative data about the cutaneous radical formation are missing. In this study, the radical formation in porcine-, (SKH-1) murine-, human- ex vivo skin and reconstructed human skin (RHS) were investigated during simulated sun irradiation (305-2200 nm), with X-band EPR spectroscopy. The amount of radical formation was investigated with the spin probe PCA exposed to a moderate sun dose below one minimal erythema dose (MED, ~25 mJ/cm2 UVB) in all skin models. Furthermore, the *OH and *CCR radical concentrations were measured with the spin trap DMPO within 0-4 MED (porcine-, human skin and RHS). The highest amount of radicals was found in RHS followed by murine and porcine, and the lowest amount in human ex vivo skin. In all skin models, more *OH than CCR radicals were found at 0-4 MED. Additionally, this work addresses the limitations in the characterization with the spin trap DMPO. The measurements have shown that the most comparable skin model to in vivo human skin could differ depending on the focus of the investigation. If the amount of radial production is regarded, RHS seems to be in a similar range like in vivo human skin. If the investigation is focused on the radical type, porcine skin is most comparable to ex vivo human skin, at an irradiation dose not exceeding 1 MED. Here, no comparison to in vivo human skin is possible.
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Affiliation(s)
- Stephanie Albrecht
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin, Germany.
| | - Anja Elpelt
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin, Germany; Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2+4, 14195 Berlin, Germany.
| | - Ceyda Kasim
- Institute of Biotechnology, Technische Universität Berlin, Ackerstr. 76, 13355 Berlin Germany
| | - Carina Reble
- Courage + Khazaka Electronic GmbH, Mathias-Brüggen-Str. 91, 50829 Köln, Germany.
| | - Lars Mundhenk
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertag-Str. 15, 14163 Berlin, Germany.
| | - Hannah Pischon
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertag-Str. 15, 14163 Berlin, Germany.
| | - Sarah Hedtrich
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2+4, 14195 Berlin, Germany.
| | - Christian Witzel
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin, Germany.
| | - Jürgen Lademann
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin, Germany.
| | - Leonhard Zastrow
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin, Germany
| | - Ingeborg Beckers
- Beuth University of Applied Sciences Berlin, Luxemburger Straße 10, 3353 Berlin, Germany.
| | - Martina C Meinke
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Experimental and Applied Cutaneous Physiology, Department of Dermatology, Venerology and Allergology, Charitéplatz 1, 10117 Berlin, Germany.
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19
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Dancik Y, Sriram G, Rout B, Zou Y, Bigliardi-Qi M, Bigliardi PL. Physical and compositional analysis of differently cultured 3D human skin equivalents by confocal Raman spectroscopy. Analyst 2019; 143:1065-1076. [PMID: 29368763 DOI: 10.1039/c7an01675a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Three-dimensional skin equivalents are increasingly gaining acceptance as non-animal based experimental models of human skin. They are particularly suited to studying differences in physical and compositional properties of normal and diseased skin and their impact on the skin's barrier function. Typically, a culture protocol yielding a model of normal skin is modified to create a model simulating a pathology. Skin layer thicknesses and lipid/protein contents are compared using methods that are invasive, precluding further experiments on the same replicates, and which may be prone to artefacts. We show here that confocal Raman spectroscopy (CRS) is a valuable method for non-invasive discrimination of skin equivalents grown under different culture conditions. Using 3D full-thickness skin equivalents developed in-house, we measure significant differences in stratum corneum and viable epidermis apparent thicknesses resulting from a 7-day difference in the cultures' air-lift phase and from supplementation of the culture medium with interleukin 4. Furthermore, stratum corneum thicknesses obtained by CRS are up to 2.6-fold higher than values measured from histological photomicrographs. Regarding composition, CRS reveals the differential effects of the culture protocol modifications on ceramide, cholesterol and protein composition as a function of depth in the stratum corneum.
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Affiliation(s)
- Y Dancik
- Experimental Dermatology Laboratory, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, Singapore 138648.
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20
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Miloudi L, Bonnier F, Tfayli A, Yvergnaux F, Byrne HJ, Chourpa I, Munnier E. Confocal Raman spectroscopic imaging for in vitro monitoring of active ingredient penetration and distribution in reconstructed human epidermis model. JOURNAL OF BIOPHOTONICS 2018; 11:e201700221. [PMID: 29144055 DOI: 10.1002/jbio.201700221] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 11/14/2017] [Indexed: 06/07/2023]
Abstract
Topically applied active cosmetic ingredients (ACI) or active pharmaceutical ingredients (API) efficacy is directly related to their efficiency of penetration in the skin. In vitro reconstructed human epidermis surrogate models offer in vivo like skin samples for transdermal studies. Using Delipidol®, an ACI currently used in the cosmetics industry, the capabilities to deliver accurate distribution maps and penetration profiles of this molecule by means of confocal Raman spectroscopic imaging have been demonstrated. Using a non-negative constrained least squares (NCLS) approach, contribution of specific molecules can be estimated at each point of spectral maps in order to deliver semi-quantitative heat maps representing the ACI levels in the different skin layers. The concentration profiles obtained are approximately single exponential for all 3 time points evaluated, with a consistent decay constant, which is independent of the sublayer structure. Notably, however, there is no significant penetration into the lower basal layers until a critical concentration is built up, after 3 hours. Combination of Raman confocal imaging with spectral unmixing methods such as NCLS is demonstrated to be a relevant approach for in vitro biological evaluation of cosmetic and pharmaceutical active ingredients and could easily be implemented as a screening tool for industrial use.
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Affiliation(s)
- Lynda Miloudi
- Université François-Rabelais de Tours, faculty of pharmacy, EA6295 Nanomédicaments et Nanosondes, Tours, France
| | - Franck Bonnier
- Université François-Rabelais de Tours, faculty of pharmacy, EA6295 Nanomédicaments et Nanosondes, Tours, France
| | - Ali Tfayli
- EA7357 Lip (Sys)2 "Lipides : Systèmes Analytiques et Biologiques", Faculty of Pharmacy, University Paris Saclay, Châtenay-Malabry, France
| | | | - Hugh J Byrne
- FOCAS Research Institute, Dublin Institute of Technology, Dublin, Ireland
| | - Igor Chourpa
- Université François-Rabelais de Tours, faculty of pharmacy, EA6295 Nanomédicaments et Nanosondes, Tours, France
| | - Emilie Munnier
- Université François-Rabelais de Tours, faculty of pharmacy, EA6295 Nanomédicaments et Nanosondes, Tours, France
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21
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22
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Atef E, Altuwaijri N. Using Raman Spectroscopy in Studying the Effect of Propylene Glycol, Oleic Acid, and Their Combination on the Rat Skin. AAPS PharmSciTech 2018. [PMID: 28620762 DOI: 10.1208/s12249-017-0800-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The permeability enhancement effect of oleic acid (OA) and propylene glycol (PG) as well as their (1:1 v/v) combined mixture was studied using rat skin. The percutaneous drug administration is a challenge and an opportunity for drug delivery. To date, there is limited research that illustrates the mechanism of penetration enhancers and their combinations on the skin. This project aims to explore the skin diffusion and penetration enhancement of PG, OA, and a combination of PG-OA (1:1 v/v) on rat skin and to identify the potential synergistic effect of the two enhancers utilizing Raman spectroscopy. Dissected dorsal skin was treated with either PG or OA or their combination for predetermined time intervals after which the Raman spectra of the treated skin were collected with the enhancer. A spectrum of the wiped and the washed skin were also collected. The skin integrity was tested before and after exposure to PG. The skin histology proved that the skin integrity has been maintained during experiments and the results indicated that OA disrupted rat skin lipid as evident by changes in the lipid peak. The results also showed that PG and OA improved the diffusion of each other and created faster, yet reversible changes of the skin peaks. In conclusion, Raman spectroscopy is a potential tool for ex vivo skin diffusion studies. We also concluded that PG and OA have potential synergistic reversible effect on the skin.
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23
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Mohamed HT, Untereiner V, Sockalingum GD, Brézillon S. Implementation of infrared and Raman modalities for glycosaminoglycan characterization in complex systems. Glycoconj J 2016; 34:309-323. [PMID: 27928742 PMCID: PMC5487820 DOI: 10.1007/s10719-016-9743-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/27/2016] [Accepted: 10/12/2016] [Indexed: 10/25/2022]
Abstract
Glycosaminoglycans (GAGs) are natural, linear and negatively charged heteropolysaccharides which are incident in every mammalian tissue. They consist of repeating disaccharide units, which are composed of either sulfated or non-sulfated monosaccharides. Depending on tissue types, GAGs exhibit structural heterogeneity such as the position and degree of sulfation or within their disaccharide units composition being heparin, heparan sulfate, chondroitine sulfate, dermatan sulfate, keratan sulfate, and hyaluronic acid. They are covalently linked to a core protein (proteoglycans) or as free chains (hyaluronan). GAGs affect cell properties and functions either by direct interaction with cell receptors or by sequestration of growth factors. These evidences of divert biological roles of GAGs make their characterization at cell and tissue levels of importance. Thus, non-invasive techniques are interesting to investigate, to qualitatively and quantitatively characterize GAGs in vitro in order to use them as diagnostic biomarkers and/or as therapeutic targets in several human diseases including cancer. Infrared and Raman microspectroscopies and imaging are sensitive enough to differentiate and classify GAG types and subtypes in spite of their close molecular structures. Spectroscopic markers characteristic of reference GAG molecules were identified. Beyond these investigations of the standard GAG spectral signature, infrared and Raman spectral signatures of GAG were searched in complex biological systems like cells. The aim of the present review is to describe the implementation of these complementary vibrational spectroscopy techniques, and to discuss their potentials, advantages and disadvantages for GAG analysis. In addition, this review presents new data as we show for the first time GAG infrared and Raman spectral signatures from conditioned media and live cells, respectively.
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Affiliation(s)
- Hossam Taha Mohamed
- Department of Zoology, Faculty of Science, Cairo University, Giza, Egypt.,CNRS UMR7369, Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Reims, France.,MéDIAN-Biophotonique et Technologies pour la Santé, UFR de Pharmacie, Reims, France
| | - Valérie Untereiner
- CNRS UMR7369, Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Reims, France.,MéDIAN-Biophotonique et Technologies pour la Santé, UFR de Pharmacie, Reims, France.,Plateforme d'imagerie Cellulaire et Tissulaire (PICT), Université de Reims Champagne-Ardenne, Reims, France
| | - Ganesh D Sockalingum
- CNRS UMR7369, Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Reims, France.,MéDIAN-Biophotonique et Technologies pour la Santé, UFR de Pharmacie, Reims, France
| | - Stéphane Brézillon
- CNRS UMR7369, Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Reims, France. .,Laboratoire de Biochimie Médicale et Biologie Moléculaire, UFR de Médecine, Université de Reims Champagne-Ardenne, Reims, France.
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Quatela A, Miloudi L, Tfayli A, Baillet-Guffroy A. In vivo Raman Microspectroscopy: Intra- and Intersubject Variability of Stratum Corneum Spectral Markers. Skin Pharmacol Physiol 2016; 29:102-9. [DOI: 10.1159/000445079] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 02/28/2016] [Indexed: 11/19/2022]
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25
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Yorucu C, Lau K, Mittar S, Green NH, Raza A, Rehman IU, MacNeil S. Raman spectroscopy detects melanoma and the tissue surrounding melanoma using tissue-engineered melanoma models. APPLIED SPECTROSCOPY REVIEWS 2016; 51:243-257. [PMID: 27158185 PMCID: PMC4854220 DOI: 10.1080/05704928.2015.1126840] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Invasion of melanoma cells from the primary tumor involves interaction with adjacent tissues and extracellular matrix. The extent of this interaction is not fully understood. In this study Raman spectroscopy was applied to cryo-sections of established 3D models of melanoma in human skin. Principal component analysis was used to investigate differences between the tumor and normal tissue and between the peri-tumor area and the normal skin. Two human melanoma cells lines A375SM and C8161 were investigated and compared in 3D melanoma models. Changes were found in protein conformations and tryptophan configurations across the entire melanoma samples, in tyrosine orientation and in more fluid lipid packing only in tumor dense areas, and in increased glycogen content in the peri-tumor areas of melanoma. Raman spectroscopy revealed changes around the perimeter of a melanoma tumor as well as detecting differences between the tumor and the normal tissue.
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Affiliation(s)
- Ceyla Yorucu
- Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK
| | | | - Shweta Mittar
- Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK
| | - Nicola H. Green
- Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK
| | - Ahtasham Raza
- Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK
| | - Ihtesham Ur Rehman
- Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK
| | - Sheila MacNeil
- Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK
- CONTACT Sheila MacNeil Department of Materials Science & Engineering, University of Sheffield, Kroto Research Building, North Campus, Broad Lane, SheffieldS3 7HQ, UK.
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26
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Tosato M, Orallo D, Ali S, Churio M, Martin A, Dicelio L. Confocal Raman spectroscopy: In vivo biochemical changes in the human skin by topical formulations under UV radiation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:51-8. [DOI: 10.1016/j.jphotobiol.2015.08.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/12/2015] [Accepted: 08/30/2015] [Indexed: 12/13/2022]
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27
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Franzen L, Windbergs M. Applications of Raman spectroscopy in skin research--From skin physiology and diagnosis up to risk assessment and dermal drug delivery. Adv Drug Deliv Rev 2015; 89:91-104. [PMID: 25868454 DOI: 10.1016/j.addr.2015.04.002] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 03/24/2015] [Accepted: 04/01/2015] [Indexed: 11/29/2022]
Abstract
In the field of skin research, confocal Raman microscopy is an upcoming analytical technique. Substantial technical progress in design and performance of the individual setup components like detectors and lasers as well as the combination with confocal microscopy enables chemically selective and non-destructive sample analysis with high spatial resolution in three dimensions. Due to these advantages, the technique bears tremendous potential for diverse skin applications ranging from the analysis of physiological component distribution in skin tissue and the diagnosis of pathological states up to biopharmaceutical investigations such as drug penetration kinetics within the different tissue layers. This review provides a comprehensive introduction about the basic principles of Raman microscopy highlighting the advantages and considering the limitations of the technique for skin applications. Subsequently, an overview about skin research studies applying Raman spectroscopy is given comprising various in vitro as well as in vivo implementations. Furthermore, the future perspective and potential of Raman microscopy in the field of skin research are discussed.
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Affiliation(s)
- Lutz Franzen
- Saarland University, Department of Biopharmaceutics and Pharmaceutical Technology, Saarbruecken, Germany
| | - Maike Windbergs
- Saarland University, Department of Biopharmaceutics and Pharmaceutical Technology, Saarbruecken, Germany; Helmholtz Centre for Infection Research, Helmholtz Institute for Pharmaceutical Research Saarland, Department of Drug Delivery, Saarbruecken, Germany; PharmBioTec GmbH, Saarbruecken, Germany.
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Pacia MZ, Mateuszuk L, Chlopicki S, Baranska M, Kaczor A. Biochemical changes of the endothelium in the murine model of NO-deficient hypertension. Analyst 2015; 140:2178-84. [DOI: 10.1039/c4an01870b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Alterations in the α-helix and β-sheet content and the lipid-to-protein ratio are the most striking features of hypertension development in the vascular endothelium.
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Affiliation(s)
- M. Z. Pacia
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Krakow
- Poland
- Jagiellonian Centre for Experimental Therapeutics (JCET)
| | - L. Mateuszuk
- Jagiellonian Centre for Experimental Therapeutics (JCET)
- Jagiellonian University
- 30-348 Krakow
- Poland
| | - S. Chlopicki
- Jagiellonian Centre for Experimental Therapeutics (JCET)
- Jagiellonian University
- 30-348 Krakow
- Poland
- Department of Experimental Pharmacology
| | - M. Baranska
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Krakow
- Poland
- Jagiellonian Centre for Experimental Therapeutics (JCET)
| | - A. Kaczor
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Krakow
- Poland
- Jagiellonian Centre for Experimental Therapeutics (JCET)
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Leroy M, Labbé JF, Ouellet M, Jean J, Lefèvre T, Laroche G, Auger M, Pouliot R. A comparative study between human skin substitutes and normal human skin using Raman microspectroscopy. Acta Biomater 2014; 10:2703-11. [PMID: 24530562 DOI: 10.1016/j.actbio.2014.02.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 01/27/2014] [Accepted: 02/03/2014] [Indexed: 11/17/2022]
Abstract
Research in the field of bioengineered skin substitutes is motivated by the need to find new dressings for people affected by skin injuries (burns, diabetic ulcers), and to develop adequate skin models to test new formulations developed in vitro. Thanks to advances in tissue engineering, it is now possible to produce human skin substitutes without any exogenous material, using the self-assembly method developed by the Laboratoire d'Organogénèse Expérimentale. These human skin substitutes consist of a dermis and a stratified epidermis (stratum corneum and living epidermis). Raman microspectroscopy has been used to characterize and compare the molecular organization of skin substitutes with normal human skin. Our results confirm that the stratum corneum is a layer rich in lipids which are well ordered (trans conformers) in both substitutes and normal human skin. The amount of lipids decreases and more gauche conformers appear in the living epidermis in both cases. However, the results also show that there are fewer lipids in the substitutes and that the lipids are more organized in the normal human skin. Concerning the secondary structure of proteins and protein content, the data show that they are similar in the substitutes and in the normal human skin. In fact, the epidermis is rich in α-keratin, whereas the dermis contains mainly type I collagen.
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Affiliation(s)
- Marie Leroy
- Laboratoire d'Ingénierie de Surface (LIS), Département de Génie des Mines, de la Métallurgie et des Matériaux, Centre de Recherche sur les Matériaux Avancés (CERMA), Université Laval, 1065 avenue de la médecine, Québec, QC G1V 0A6, Canada; Centre de Recherche du CHU de Québec, Hôpital St-François d'Assise, 10 rue de l'Espinay, Québec, QC G1L 3L5, Canada; Centre LOEX de l'Université Laval, Génie Tissulaire et Régénération: LOEX-Centre de Recherche du CHU de Québec, Hôpital de l'Enfant Jesus, 1401, 18(e) rue, Québec, QC G1J 1Z4, Canada; Département de Chimie, Regroupement québécois sur la fonction, la structure et l'ingénierie des protéines (PROTEO), CERMA, Université Laval, 1045 avenue de la médecine, Québec, QC G1V 0A6, Canada
| | - Jean-François Labbé
- Département de Chimie, Regroupement québécois sur la fonction, la structure et l'ingénierie des protéines (PROTEO), CERMA, Université Laval, 1045 avenue de la médecine, Québec, QC G1V 0A6, Canada
| | - Marise Ouellet
- Département de Chimie, Regroupement québécois sur la fonction, la structure et l'ingénierie des protéines (PROTEO), CERMA, Université Laval, 1045 avenue de la médecine, Québec, QC G1V 0A6, Canada
| | - Jessica Jean
- Centre LOEX de l'Université Laval, Génie Tissulaire et Régénération: LOEX-Centre de Recherche du CHU de Québec, Hôpital de l'Enfant Jesus, 1401, 18(e) rue, Québec, QC G1J 1Z4, Canada
| | - Thierry Lefèvre
- Département de Chimie, Regroupement québécois sur la fonction, la structure et l'ingénierie des protéines (PROTEO), CERMA, Université Laval, 1045 avenue de la médecine, Québec, QC G1V 0A6, Canada
| | - Gaétan Laroche
- Laboratoire d'Ingénierie de Surface (LIS), Département de Génie des Mines, de la Métallurgie et des Matériaux, Centre de Recherche sur les Matériaux Avancés (CERMA), Université Laval, 1065 avenue de la médecine, Québec, QC G1V 0A6, Canada; Centre de Recherche du CHU de Québec, Hôpital St-François d'Assise, 10 rue de l'Espinay, Québec, QC G1L 3L5, Canada
| | - Michèle Auger
- Département de Chimie, Regroupement québécois sur la fonction, la structure et l'ingénierie des protéines (PROTEO), CERMA, Université Laval, 1045 avenue de la médecine, Québec, QC G1V 0A6, Canada.
| | - Roxane Pouliot
- Centre LOEX de l'Université Laval, Génie Tissulaire et Régénération: LOEX-Centre de Recherche du CHU de Québec, Hôpital de l'Enfant Jesus, 1401, 18(e) rue, Québec, QC G1J 1Z4, Canada.
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Tfayli A, Bonnier F, Farhane Z, Libong D, Byrne HJ, Baillet-Guffroy A. Comparison of structure and organization of cutaneous lipids in a reconstructed skin model and human skin: spectroscopic imaging and chromatographic profiling. Exp Dermatol 2014; 23:441-3. [DOI: 10.1111/exd.12423] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Ali Tfayli
- Group of Analytical Chemistry of Paris-Sud (GCAPS); Faculty of Pharmacy; University Paris-Sud; Chatenay-Malabry France
| | - Franck Bonnier
- Focas Research Institute; Dublin Institute of Technology; Dublin 8 Ireland
| | - Zeineb Farhane
- Group of Analytical Chemistry of Paris-Sud (GCAPS); Faculty of Pharmacy; University Paris-Sud; Chatenay-Malabry France
| | - Danielle Libong
- Group of Analytical Chemistry of Paris-Sud (GCAPS); Faculty of Pharmacy; University Paris-Sud; Chatenay-Malabry France
| | - Hugh J. Byrne
- Focas Research Institute; Dublin Institute of Technology; Dublin 8 Ireland
| | - Arlette Baillet-Guffroy
- Group of Analytical Chemistry of Paris-Sud (GCAPS); Faculty of Pharmacy; University Paris-Sud; Chatenay-Malabry France
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Catalano E, Cochis A, Varoni E, Rimondini L, Azzimonti B. Tissue-engineered skin substitutes: an overview. J Artif Organs 2013; 16:397-403. [PMID: 24096542 DOI: 10.1007/s10047-013-0734-0] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 09/19/2013] [Indexed: 12/14/2022]
Abstract
Extensive skin loss and chronic wounds are still a significant challenge to clinicians: even if injured epidermis is normally able to self-renew, deep injuries can cause negative regulation of the wound healing cascade, leading to chronic wound formation. Skin-autografting surgical procedures are often limited by the poor availability of healthy tissue, whereas the use of non-self-tissues for allografts presents some severe risks. Tissue-engineered skin substitutes have recently become viable as a suitable alternative to auto- and allografts. However, biologists, biochemists, and technical engineers are still struggling to produce complex skin substitutes that can readily be transplanted in large quantities. The ambitious goal is now to construct a dermoepidermal substitute that rapidly vascularizes and optimally supports a stratifying epidermal graft on a biodegradable matrix. This review analyzes these aspects in light of the available literature and the authors' experience.
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Affiliation(s)
- Enrico Catalano
- Laboratory of Biomedical Materials, Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", Via Solaroli 17, 28100, Novara, NO, Italy
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Muratore M. Raman spectroscopy and partial least squares analysis in discrimination of peripheral cells affected by Huntington's disease. Anal Chim Acta 2013; 793:1-10. [DOI: 10.1016/j.aca.2013.06.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 06/07/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
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Hwang YJ, Lyubovitsky JG. The structural analysis of three-dimensional fibrous collagen hydrogels by raman microspectroscopy. Biopolymers 2013; 99:349-56. [DOI: 10.1002/bip.22183] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 11/06/2012] [Accepted: 11/07/2012] [Indexed: 01/13/2023]
Affiliation(s)
- Yu Jer Hwang
- Cell Molecular and Developmental Biology Program; University of California; Riverside; CA; 92521
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Vyumvuhore R, Tfayli A, Duplan H, Delalleau A, Manfait M, Baillet-Guffroy A. Effects of atmospheric relative humidity on Stratum Corneum structure at the molecular level: ex vivo Raman spectroscopy analysis. Analyst 2013; 138:4103-11. [DOI: 10.1039/c3an00716b] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Sowoidnich K, Kronfeldt HD. Fluorescence Rejection by Shifted Excitation Raman Difference Spectroscopy at Multiple Wavelengths for the Investigation of Biological Samples. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/256326] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Shifted excitation Raman difference spectroscopy (SERDS) was applied for an effective fluorescence removal in the Raman spectra of meat, fat, connective tissue, and bone from pork and beef. As excitation light sources, microsystem diode lasers emitting at 783 nm, 671 nm, and 488 nm each incorporating two slightly shifted excitation wavelengths with a spectral difference of about 10 cm−1 necessary for SERDS operation were used. The moderate fluorescence interference for 783 nm excitation as well as the increased background level at 671 nm was efficiently rejected using SERDS resulting in a straight horizontal baseline. This allows for identification of all characteristic Raman signals including weak bands which are clearly visible and overlapping signals that are resolved in the SERDS spectra. At 488 nm excitation, the spectra contain an overwhelming fluorescence interference masking nearly all Raman signals of the probed tissue samples. However, the essentially background-free SERDS spectra enable determining the majority of characteristic Raman bands of the samples under investigation. Furthermore, 488 nm excitation reveals prominent carotenoid signals enhanced due to resonance Raman scattering which are present in the beef samples but absent in pork tissue enabling a rapid meat species differentiation.
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Affiliation(s)
- Kay Sowoidnich
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Sekretariat EW 0-1, Hardenbergstraße 36, 10623 Berlin, Germany
| | - Heinz-Detlef Kronfeldt
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Sekretariat EW 0-1, Hardenbergstraße 36, 10623 Berlin, Germany
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Abstract
Significant progress has been made over the years in the development of in vitro-engineered substitutes that mimic human skin, either to be used as grafts for the replacement of lost skin or for the establishment of human-based in vitro skin models. This review summarizes these advances in in vivo and in vitro applications of tissue-engineered skin. We further highlight novel efforts in the design of complex disease-in-a-dish models for studies ranging from disease etiology to drug development and screening.
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Tosato MG, Alves RS, dos Santos EA, Raniero L, Menezes PF, Belletti KM, Praes CEO, Martin AA. Raman Spectroscopic Investigation of the Effects of Cosmetic Formulations on the Constituents and Properties of Human Skin. Photomed Laser Surg 2012; 30:85-91. [DOI: 10.1089/pho.2011.3059] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Maira G. Tosato
- Laboratory of Biomedical Vibrational Spectroscopy, Institute of Research and Development (IP&D), University of the Vale do Paraíba, São José dos Campos, Brazil
| | - Rani S. Alves
- Laboratory of Biomedical Vibrational Spectroscopy, Institute of Research and Development (IP&D), University of the Vale do Paraíba, São José dos Campos, Brazil
| | - Edson A.P. dos Santos
- Laboratory of Biomedical Vibrational Spectroscopy, Institute of Research and Development (IP&D), University of the Vale do Paraíba, São José dos Campos, Brazil
| | - Leandro Raniero
- Laboratory of Biomedical Vibrational Spectroscopy, Institute of Research and Development (IP&D), University of the Vale do Paraíba, São José dos Campos, Brazil
| | | | | | | | - Airton A. Martin
- Laboratory of Biomedical Vibrational Spectroscopy, Institute of Research and Development (IP&D), University of the Vale do Paraíba, São José dos Campos, Brazil
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38
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Tfaili S, Josse G, Gobinet C, Angiboust JF, Manfait M, Piot O. Shedding light on the laser wavelength effect in Raman analysis of skin epidermises. Analyst 2012; 137:4241-6. [DOI: 10.1039/c2an16115j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bonnier F, Byrne HJ. Understanding the molecular information contained in principal component analysis of vibrational spectra of biological systems. Analyst 2012; 137:322-32. [DOI: 10.1039/c1an15821j] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pudlas M, Koch S, Bolwien C, Thude S, Jenne N, Hirth T, Walles H, Schenke-Layland K. Raman spectroscopy: a noninvasive analysis tool for the discrimination of human skin cells. Tissue Eng Part C Methods 2011; 17:1027-40. [PMID: 21774693 DOI: 10.1089/ten.tec.2011.0082] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Noninvasive monitoring of tissue-engineered (TE) constructs during their in vitro maturation or postimplantation in vivo is highly relevant for graft evaluation. However, traditional methods for studying cell and matrix components in engineered tissues such as histology, immunohistochemistry, or biochemistry require invasive tissue processing, resulting in the need to sacrifice of TE constructs. Raman spectroscopy offers the unique possibility to analyze living cells label-free in situ and in vivo solely based on their phenotype-specific biochemical fingerprint. In this study, we aimed to determine the applicability of Raman spectroscopy for the noninvasive identification and spectral separation of primary human skin fibroblasts, keratinocytes, and melanocytes, as well as immortalized keratinocytes (HaCaT cells). Multivariate analysis of cell-type-specific Raman spectra enabled the discrimination between living primary and immortalized keratinocytes. We further noninvasively distinguished between fibroblasts, keratinocytes, and melanocytes. Our findings are especially relevant for the engineering of in vitro skin models and for the production of artificial skin, where both the biopsy and the transplant consist of several cell types. To realize a reproducible quality of TE skin, the determination of the purity of the cell populations as well as the detection of potential molecular changes are important. We conclude therefore that Raman spectroscopy is a suitable tool for the noninvasive in situ quality control of cells used in skin tissue engineering applications.
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Affiliation(s)
- Marieke Pudlas
- Department of Cell and Tissue Engineering, Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB), Stuttgart, Germany
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Skin tissue engineering--in vivo and in vitro applications. Adv Drug Deliv Rev 2011; 63:352-66. [PMID: 21241756 DOI: 10.1016/j.addr.2011.01.005] [Citation(s) in RCA: 350] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 12/19/2010] [Accepted: 01/05/2011] [Indexed: 12/21/2022]
Abstract
Significant progress has been made over the years in the development of in vitro-engineered substitutes that mimic human skin, either to be used as grafts for the replacement of lost skin or for the establishment of human-based in vitro skin models. This review summarizes these advances in in vivo and in vitro applications of tissue-engineered skin. We further highlight novel efforts in the design of complex disease-in-a-dish models for studies ranging from disease etiology to drug development and screening.
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Richter M, Hedegaard M, Deckert-Gaudig T, Lampen P, Deckert V. Laterally resolved and direct spectroscopic evidence of nanometer-sized lipid and protein domains on a single cell. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:209-214. [PMID: 21213383 DOI: 10.1002/smll.201001503] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Indexed: 05/30/2023]
Affiliation(s)
- Marc Richter
- Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
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Raman Spectroscopy: A Tool for Tissue Engineering. EMERGING RAMAN APPLICATIONS AND TECHNIQUES IN BIOMEDICAL AND PHARMACEUTICAL FIELDS 2010. [DOI: 10.1007/978-3-642-02649-2_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Ly E, Durlach A, Antonicelli F, Bernard P, Manfait M, Piot O. Probing tumor and peritumoral tissues in superficial and nodular basal cell carcinoma using polarized Raman microspectroscopy. Exp Dermatol 2010; 19:68-73. [DOI: 10.1111/j.1600-0625.2009.00992.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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