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Chen FZ, Tan PC, Yang Z, Li Q, Zhou SB. Identifying characteristics of dermal fibroblasts in skin homeostasis and disease. Clin Exp Dermatol 2023; 48:1317-1327. [PMID: 37566911 DOI: 10.1093/ced/llad257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/11/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023]
Abstract
Heterogeneous dermal fibroblasts are the main components that constitute the dermis. Distinct fibroblast subgroups show specific characteristics and functional plasticity that determine dermal structure during skin development and wound healing. Although researchers have described the roles of fibroblast subsets, this is not completely understood. We review recent evidence supporting understanding about the heterogeneity of fibroblasts. We summarize the origins and the identified profiles of fibroblast subpopulations. The characteristics of fibroblast subpopulations in both healthy and diseased states are highlighted, and the potential of subpopulations to be involved in wound healing in different ways was discussed. Additionally, we review the plasticity of subpopulations and the underlying signalling mechanisms. This review may provide greater insights into potential novel therapeutic targets and tissue regeneration strategies for the future.
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Affiliation(s)
- Fang-Zhou Chen
- Department of Plastic & Reconstructive Surgery, Shanghai Jiao Tong University School of Medicine Affiliated Ninth People's Hospital, Shanghai, China
| | - Poh-Ching Tan
- Department of Plastic & Reconstructive Surgery, Shanghai Jiao Tong University School of Medicine Affiliated Ninth People's Hospital, Shanghai, China
| | - Zihan Yang
- Department of Plastic & Reconstructive Surgery, Shanghai Jiao Tong University School of Medicine Affiliated Ninth People's Hospital, Shanghai, China
- Department of Plastic and Burn Surgery, West China Hospital of Sichuan University, Chengdu, China
| | - Qingfeng Li
- Department of Plastic & Reconstructive Surgery, Shanghai Jiao Tong University School of Medicine Affiliated Ninth People's Hospital, Shanghai, China
| | - Shuang-Bai Zhou
- Department of Plastic & Reconstructive Surgery, Shanghai Jiao Tong University School of Medicine Affiliated Ninth People's Hospital, Shanghai, China
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2
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Adav SS, Ng KW. Recent omics advances in hair aging biology and hair biomarkers analysis. Ageing Res Rev 2023; 91:102041. [PMID: 37634889 DOI: 10.1016/j.arr.2023.102041] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/27/2023] [Accepted: 08/23/2023] [Indexed: 08/29/2023]
Abstract
Aging is a complex natural process that leads to a decline in physiological functions, which is visible in signs such as hair graying, thinning, and loss. Although hair graying is characterized by a loss of pigment in the hair shaft, the underlying mechanism of age-associated hair graying is not fully understood. Hair graying and loss can have a significant impact on an individual's self-esteem and self-confidence, potentially leading to mental health problems such as depression and anxiety. Omics technologies, which have applications beyond clinical medicine, have led to the discovery of candidate hair biomarkers and may provide insight into the complex biology of hair aging and identify targets for effective therapies. This review provides an up-to-date overview of recent omics discoveries, including age-associated alterations of proteins and metabolites in the hair shaft and follicle, and highlights the significance of hair aging and graying biomarker discoveries. The decline in hair follicle stem cell activity with aging decreased the regeneration capacity of hair follicles. Cellular senescence, oxidative damage and altered extracellular matrix of hair follicle constituents characterized hair follicle and hair shaft aging and graying. The review attempts to correlate the impact of endogenous and exogenous factors on hair aging. We close by discussing the main challenges and limitations of the field, defining major open questions and offering an outlook for future research.
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Affiliation(s)
- Sunil S Adav
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Kee Woei Ng
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore.
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3
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Verzì AE, Lacarrubba F, Dall'Oglio F, Puglisi D, Micali G. Density and diameter of dermal papillae from three different anatomical areas in normal skin using reflectance confocal microscopy. J Eur Acad Dermatol Venereol 2023; 37:e1248-e1250. [PMID: 37293691 DOI: 10.1111/jdv.19248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 05/30/2023] [Indexed: 06/10/2023]
Affiliation(s)
| | | | | | - Davide Puglisi
- Dermatology Clinic, University of Catania, Catania, Italy
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4
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Shen Z, Sun L, Liu Z, Li M, Cao Y, Han L, Wang J, Wu X, Sang S. Rete ridges: Morphogenesis, function, regulation, and reconstruction. Acta Biomater 2023; 155:19-34. [PMID: 36427683 DOI: 10.1016/j.actbio.2022.11.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/29/2022] [Accepted: 11/16/2022] [Indexed: 11/25/2022]
Abstract
Rete ridges (RRs) are distinct undulating microstructures at the junction of the dermis and epidermis in the skin of humans and certain animals. This structure is essential for enhancing the mechanical characteristics of skin and preserving homeostasis. With the development of tissue engineering and regenerative medicine, artificial skin grafts have made great progress in the field of skin healing. However, the restoration of RRs has been often disregarded or absent in artificial skin grafts, which potentially compromise the efficacy of tissue repair and regeneration. Therefore, this review collates recent research advances in understanding the structural features, function, morphogenesis, influencing factors, and reconstruction strategies pertaining to RRs. In addition, the preparation methods and limitations of tissue-engineered skin with RRs are discussed. STATEMENT OF SIGNIFICANCE: The technology for the development of tissue-engineered skin (TES) is widely studied and reported; however, the preparation of TES containing rete ridges (RRs) is often ignored, with no literature reviews on the structural reconstruction of RRs. This review focuses on the progress pertaining to RRs and focuses on the reconstruction methods for RRs. In addition, it discusses the limitations of existing reconstruction methods. Therefore, this review could be a valuable reference for transferring TES with RR structure from the laboratory to clinical applications in skin repair.
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Affiliation(s)
- Zhizhong Shen
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China
| | - Lei Sun
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
| | - Zixian Liu
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
| | - Meng Li
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031, China
| | - Yanyan Cao
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031, China
| | - Lu Han
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031, China
| | - Jianming Wang
- General Hospital of TISCO, North Street, Xinghualing District, Taiyuan 030809, China
| | - Xunwei Wu
- Department of Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China; Engineering Laboratory for Biomaterials and Tissue Regeneration, Ningbo Stomatology Hospital, Savaid Stomatology School, Hangzhou Medical College, Ningbo, China.
| | - Shengbo Sang
- Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China; Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
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5
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Lboukili I, Stamatas G, Descombes X. Automating reflectance confocal microscopy image analysis for dermatological research: a review. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:JBO-220021VRR. [PMID: 35879817 PMCID: PMC9309100 DOI: 10.1117/1.jbo.27.7.070902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 07/08/2022] [Indexed: 05/31/2023]
Abstract
SIGNIFICANCE Reflectance confocal microscopy (RCM) is a noninvasive, in vivo technology that offers near histopathological resolution at the cellular level. It is useful in the study of phenomena for which obtaining a biopsy is impractical or would cause unnecessary tissue damage and trauma to the patient. AIM This review covers the use of RCM in the study of skin and the use of machine learning to automate information extraction. It has two goals: (1) an overview of information provided by RCM on skin structure and how it changes over time in response to stimuli and in disease and (2) an overview of machine learning approaches developed to automate the extraction of key morphological features from RCM images. APPROACH A PubMed search was conducted with additional literature obtained from references lists. RESULTS The application of RCM as an in vivo tool in dermatological research and the biologically relevant information derived from it are presented. Algorithms for image classification to epidermal layers, delineation of the dermal-epidermal junction, classification of skin lesions, and demarcation of individual cells within an image, all important factors in the makeup of the skin barrier, were reviewed. Application of image analysis methods in RCM is hindered by low image quality due to noise and/or poor contrast. Use of supervised machine learning is limited by time-consuming manual labeling of RCM images. CONCLUSIONS RCM has great potential in the study of skin structures. The use of artificial intelligence could enable an easier, more reproducible, precise, and rigorous study of RCM images for the understanding of skin structures, skin barrier, and skin inflammation and lesions. Although several attempts have been made, further work is still needed to provide a definite gold standard and overcome issues related to image quality, limited labeled datasets, and lack of phenotype variability in available databases.
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Tan PC, Zhou SB, Ou MY, He JZ, Zhang PQ, Zhang XJ, Xie Y, Gao YM, Zhang TY, Li QF. Mechanical stretching can modify the papillary dermis pattern and papillary fibroblast characteristics during skin regeneration. J Invest Dermatol 2022; 142:2384-2394.e8. [PMID: 35181299 DOI: 10.1016/j.jid.2021.11.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 11/14/2021] [Accepted: 11/23/2021] [Indexed: 12/19/2022]
Abstract
Clinical application of mechanical stretching is a reconstructive method for skin repair. Although studies have reported dermal fibroblast heterogeneity, whether stretching affects individual fibroblast subpopulations equally remains unclear. Here, we show the changes in dermal structure and papillary fibroblast (Fp) in regenerated human skin. Exhausted skin regeneration caused dermal-epidermal junction (DEJ) flattening, papillary dermis thinning, and an increase in the type III collagen (COL3)/type I collagen (COL1) ratio with upregulated hallmarks of aging. Well-regenerated skin displayed a notable increase in the Fp population. Consistent changes were observed in the rat expansion model. Moreover, we found that TGFβ1 expression was especially increased in skin showing good regeneration. Activation of the TGFβ1/Smad2/3 pathway improved exhausted skin regeneration and resulted in increased collagen content and Fp proliferation, while pharmacological inhibition of TGFβ1 action impacted well-regenerated skin. Short-term mechanical stretching that promoted skin regeneration enhanced Fp proliferation, extracellular matrix (ECM) synthesis, and increased TGFβ1 expression, leading to good regeneration. Conversely, long-term stretching induced premature Fp senescence, leading to poor regeneration. This work shows the mechanism of mechanical stretching in well skin regeneration that enhances Fp proliferation and ECM synthesis via the TGFβ1/Smad2/3 pathway, and highlights a crucial role of Fps in stretching-induced skin regeneration.
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Affiliation(s)
- Poh-Ching Tan
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuang-Bai Zhou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min-Yi Ou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ji-Zhou He
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pei-Qi Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Jie Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Cell Biology, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Yun Xie
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi-Ming Gao
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tian-Yu Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Cell Biology, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Qing-Feng Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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7
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Chauvel-Picard J, Bérot V, Tognetti L, Orte Cano C, Fontaine M, Lenoir C, Pérez-Anker J, Puig S, Dubois A, Forestier S, Monnier J, Jdid R, Cazorla G, Pedrazzani M, Sanchez A, Fischman S, Rubegni P, Del Marmol V, Malvehy J, Cinotti E, Perrot JL, Suppa M. Line-field confocal optical coherence tomography as a tool for three-dimensional in vivo quantification of healthy epidermis: A pilot study. JOURNAL OF BIOPHOTONICS 2022; 15:e202100236. [PMID: 34608756 DOI: 10.1002/jbio.202100236] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/16/2021] [Accepted: 09/23/2021] [Indexed: 05/12/2023]
Abstract
Epidermal three-dimensional (3D) topography/quantification has not been completely characterized yet. The recently developed line-field confocal optical coherence tomography (LC-OCT) provides real-time, high-resolution, in-vivo 3D imaging of the skin. This pilot study aimed at quantifying epidermal metrics (epidermal thicknesses, dermal-epidermal junction [DEJ] undulation and keratinocyte number/shape/size) using 3D LC-OCT. For each study participant (8 female, skin-type-II, younger/older volunteers), seven body sites were imaged with LC-OCT. Epidermal metrics were calculated by segmentations and measurements assisted by artificial intelligence (AI) when appropriate. Thicknesses of epidermis/SC, DEJ undulation and keratinocyte nuclei volume varied across body sites. Evidence of keratinocyte maturation was observed in vivo: keratinocyte nuclei being small/spherical near the DEJ and flatter/elliptical near the skin surface. Skin microanatomy can be quantified by combining LC-OCT and AI. This technology could be highly relevant to understand aging processes and conditions linked to epidermal disorders. Future clinical/research applications are to be expected in this scenario.
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Affiliation(s)
- Julie Chauvel-Picard
- Department of Craniomaxillofacial Surgery, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Vincent Bérot
- Department of Dermatology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Linda Tognetti
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena, Italy
| | - Carmen Orte Cano
- Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Margot Fontaine
- Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Clément Lenoir
- Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Javiera Pérez-Anker
- Melanoma Unit, Hospital Clinic Barcelona, University of Barcelona, Barcelona, Spain
- CIBER de enfermedades raras, Instituto de Salud Carlos III, Barcelona, Spain
| | - Susana Puig
- Melanoma Unit, Hospital Clinic Barcelona, University of Barcelona, Barcelona, Spain
- CIBER de enfermedades raras, Instituto de Salud Carlos III, Barcelona, Spain
| | - Arnaud Dubois
- Université Paris-Saclay, Institut d'Optique Graduate School, Laboratoire Charles Fabry, Palaiseau, France
| | - Sandra Forestier
- Chanel Parfums Beauté, Innovation Research and Development, Pantin, France
| | - Jilliana Monnier
- Department of Dermatology and Skin Cancer, la Timone hospital, Assistance Publique-Hôpitaux de Marseille, Aix-Marseille University, Marseille, France
- Groupe d'Imagerie Cutanée Non Invasive (GICNI) of the Société Française de Dermatologie (SFD), Paris, France
| | - Randa Jdid
- Chanel Parfums Beauté, Innovation Research and Development, Pantin, France
| | - Gabriel Cazorla
- Chanel Parfums Beauté, Innovation Research and Development, Pantin, France
| | | | - Antoine Sanchez
- DAMAE Medical, Paris, France
- Department of Bioengineering, South Kensington Campus, Imperial College London, London, UK
| | | | - Pietro Rubegni
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena, Italy
| | - Véronique Del Marmol
- Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Joseph Malvehy
- Melanoma Unit, Hospital Clinic Barcelona, University of Barcelona, Barcelona, Spain
- CIBER de enfermedades raras, Instituto de Salud Carlos III, Barcelona, Spain
| | - Elisa Cinotti
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena, Italy
- Groupe d'Imagerie Cutanée Non Invasive (GICNI) of the Société Française de Dermatologie (SFD), Paris, France
| | - Jean L Perrot
- Department of Dermatology, University Hospital of Saint-Etienne, Saint-Etienne, France
- Groupe d'Imagerie Cutanée Non Invasive (GICNI) of the Société Française de Dermatologie (SFD), Paris, France
| | - Mariano Suppa
- Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
- Groupe d'Imagerie Cutanée Non Invasive (GICNI) of the Société Française de Dermatologie (SFD), Paris, France
- Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
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8
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Schneckenreither G, Tschandl P, Rippinger C, Sinz C, Brunmeir D, Popper N, Kittler H. Reproduction of patterns in melanocytic proliferations by agent-based simulation and geometric modeling. PLoS Comput Biol 2021; 17:e1008660. [PMID: 33539342 PMCID: PMC7888658 DOI: 10.1371/journal.pcbi.1008660] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 02/17/2021] [Accepted: 01/04/2021] [Indexed: 12/18/2022] Open
Abstract
Spatio-temporal patterns of melanocytic proliferations observed in vivo are important for diagnosis but the mechanisms that produce them are poorly understood. Here we present an agent-based model for simulating the emergence of the main biologic patterns found in melanocytic proliferations. Our model portrays the extracellular matrix of the dermo-epidermal junction as a two-dimensional manifold and we simulate cellular migration in terms of geometric translations driven by adhesive, repulsive and random forces. Abstracted cellular functions and melanocyte-matrix interactions are modeled as stochastic events. For identification and validation we use visual renderings of simulated cell populations in a horizontal perspective that reproduce growth patterns observed in vivo by sequential dermatoscopy and corresponding vertical views that reproduce the arrangement of melanocytes observed in histopathologic sections. Our results show that a balanced interplay of proliferation and migration produces the typical reticular pattern of nevi, whereas the globular pattern involves additional cellular mechanisms. We further demonstrate that slight variations in the three basic cellular properties proliferation, migration, and adhesion are sufficient to produce a large variety of morphological appearances of nevi. We anticipate our model to be a starting point for the reproduction of more complex scenarios that will help to establish functional connections between abstracted microscopic behavior and macroscopic patterns in all types of melanocytic proliferations including melanoma.
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Affiliation(s)
- Günter Schneckenreither
- Institute of Information Systems Engineering, TU Wien, Vienna, Austria.,Institute of Analysis and Scientific Computing, TU Wien, Vienna, Austria.,dwh simulation service, dwh GmbH, Vienna, Austria
| | - Philipp Tschandl
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | | | - Christoph Sinz
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | | | - Nikolas Popper
- Institute of Information Systems Engineering, TU Wien, Vienna, Austria.,dwh simulation service, dwh GmbH, Vienna, Austria
| | - Harald Kittler
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
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9
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Roig-Rosello E, Rousselle P. The Human Epidermal Basement Membrane: A Shaped and Cell Instructive Platform That Aging Slowly Alters. Biomolecules 2020; 10:E1607. [PMID: 33260936 PMCID: PMC7760980 DOI: 10.3390/biom10121607] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022] Open
Abstract
One of the most important functions of skin is to act as a protective barrier. To fulfill this role, the structural integrity of the skin depends on the dermal-epidermal junction-a complex network of extracellular matrix macromolecules that connect the outer epidermal layer to the underlying dermis. This junction provides both a structural support to keratinocytes and a specific niche that mediates signals influencing their behavior. It displays a distinctive microarchitecture characterized by an undulating pattern, strengthening dermal-epidermal connectivity and crosstalk. The optimal stiffness arising from the overall molecular organization, together with characteristic anchoring complexes, keeps the dermis and epidermis layers extremely well connected and capable of proper epidermal renewal and regeneration. Due to intrinsic and extrinsic factors, a large number of structural and biological changes accompany skin aging. These changes progressively weaken the dermal-epidermal junction substructure and affect its functions, contributing to the gradual decline in overall skin physiology. Most changes involve reduced turnover or altered enzymatic or non-enzymatic post-translational modifications, compromising the mechanical properties of matrix components and cells. This review combines recent and older data on organization of the dermal-epidermal junction, its mechanical properties and role in mechanotransduction, its involvement in regeneration, and its fate during the aging process.
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Affiliation(s)
- Eva Roig-Rosello
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS-Université Lyon 1, SFR BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, 69367 Lyon, France;
- Roger Gallet SAS, 4 rue Euler, 75008 Paris, France
| | - Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS-Université Lyon 1, SFR BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, 69367 Lyon, France;
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10
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Cinotti E, Bovi C, Tonini G, Labeille B, Heusèle C, Nizard C, Schnebert S, Aubailly S, Barthélémy JC, Cambazard F, Cevenini G, Tognetti L, Cartocci A, Rubegni P, Perrot JL. Structural skin changes in elderly people investigated by reflectance confocal microscopy. J Eur Acad Dermatol Venereol 2020; 34:2652-2658. [PMID: 32294278 DOI: 10.1111/jdv.16466] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 03/17/2020] [Accepted: 03/25/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Reflectance confocal microscopy (RCM) is particularly suitable for the study of skin ageing because it provides nearly histological information in vivo and non-invasively. However, there are no studies that evaluated RCM skin features of a large population older than 70 years. OBJECTIVES The aim of our investigation was to study age-related skin changes in an elderly population by RCM and to evaluate their topographical and gender differences. METHODS We obtained RCM images of photoprotected (volar arm) and chronic (face) and intermittently photoexposed (dorsal forearm) body sites of 209 volunteers (105 women and 104 men, mean age: 77.5, range 74-81 years). 15 previously reported and new RCM parameters related to skin ageing were assessed. RESULTS Photoexposed sites had thicker suprapapillary epidermis, more linear, distant and thin furrows, higher presence of mottled pigmentation, polycyclic papillae and coarse and huddled collagen and lower presence of dermal papillae than the photoprotected site. Irregular honeycomb pattern was not higher in photoexposed sites, indicating that it is probably more dependent on intrinsic ageing. Two ageing scores defined for facial skin ageing (epidermal disarray score and epidermal hyperplasia score) were found useful for the identification of photoageing. Gender differences only concerned some RCM parameters (i.e. thickness of different layers of the epidermis, furrows and collagen score) and some body sites, in line with the fact that women and men of our cohort had no major differences in clinically visible skin ageing. CONCLUSIONS Our study confirmed that RCM is a powerful non-invasive technique to microscopically quantify ageing signs and our observations contribute to highlight the differences between intrinsic and extrinsic ageing.
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Affiliation(s)
- E Cinotti
- Dermatology Unit, Department of Medical, Surgical and Neuro-Sciences, University of Siena, Siena, Italy
| | - C Bovi
- Dermatology Unit, Department of Medical, Surgical and Neuro-Sciences, University of Siena, Siena, Italy
| | - G Tonini
- Dermatology Unit, Department of Medical, Surgical and Neuro-Sciences, University of Siena, Siena, Italy
| | - B Labeille
- Department of Dermatology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - C Heusèle
- LVMH Research, Saint-Jean-de-Braye, France
| | - C Nizard
- LVMH Research, Saint-Jean-de-Braye, France
| | | | - S Aubailly
- LVMH Research, Saint-Jean-de-Braye, France
| | - J C Barthélémy
- Clinical and Exercise Physiology Laboratory, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - F Cambazard
- Department of Dermatology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - G Cevenini
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - L Tognetti
- Dermatology Unit, Department of Medical, Surgical and Neuro-Sciences, University of Siena, Siena, Italy
| | - A Cartocci
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - P Rubegni
- Dermatology Unit, Department of Medical, Surgical and Neuro-Sciences, University of Siena, Siena, Italy
| | - J L Perrot
- Department of Dermatology, University Hospital of Saint-Etienne, Saint-Etienne, France
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Sun CK, Wu PJ, Chen ST, Su YH, Wei ML, Wang CY, Gao HC, Sung KB, Liao YH. Slide-free clinical imaging of melanin with absolute quantities using label-free third-harmonic-generation enhancement-ratio microscopy. BIOMEDICAL OPTICS EXPRESS 2020; 11:3009-3024. [PMID: 32637238 PMCID: PMC7316008 DOI: 10.1364/boe.391451] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/24/2020] [Accepted: 05/04/2020] [Indexed: 05/21/2023]
Abstract
The capability to image the 3D distribution of melanin in human skin in vivo with absolute quantities and microscopic details will not only enable noninvasive histopathological diagnosis of melanin-related cutaneous disorders, but also make long term treatment assessment possible. In this paper, we demonstrate clinical in vivo imaging of the melanin distribution in human skin with absolute quantities on mass density and with microscopic details by using label-free third-harmonic-generation (THG) enhancement-ratio microscopy. As the dominant absorber in skin, melanin provides the strongest THG nonlinearity in human skin due to resonance enhancement. We show that the THG-enhancement-ratio (erTHG) parameter can be calibrated in vivo and can indicate the melanin mass density. With an unprecedented clinical imaging resolution, our study revealed erTHG-microscopy's unique capability for long-term treatment assessment and direct clinical observation of melanin's micro-distribution to shed light into the unknown pathway and regulation mechanism of melanosome transfer and translocation.
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Affiliation(s)
- Chi-Kuang Sun
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Pei-Jhe Wu
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Sheng-Tse Chen
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Hsiang Su
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Ming-Liang Wei
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Chiao-Yi Wang
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Hao-Cheng Gao
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Kung-Bing Sung
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 10002, Taiwan
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12
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Liu Z, Jiang M, Zhao J, Wang Q, Zhang C, Gao M, Gu M, Xiang L. Efficacy of a wound-dressing biomaterial on prevention of postinflammatory hyperpigmentation after suction blister epidermal grafting in stable vitiligo patients: a controlled assessor-blinded clinical study with in vitro bioactivity investigation. Arch Dermatol Res 2020; 312:635-645. [PMID: 32107629 DOI: 10.1007/s00403-020-02049-2] [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: 09/18/2019] [Revised: 02/03/2020] [Accepted: 02/12/2020] [Indexed: 12/30/2022]
Abstract
Postinflammatory hyperpigmentation (PIH) is a common disfiguring complication following inflammatory dermatoses and cosmetic procedures in dark-skinned individuals. Anti-inflammatory and repairing agents targeting primary inflammation and injury are becoming promising choices for preventing PIH. The aim of this active-controlled, assessor-blinded, intra-individual monocentric study was to evaluate the preventive effect of a wound-dressing biomaterial, mussel adhesive protein (MAP) in the suction blister-induced PIH model. Twenty Chinese patients underwent suction blister epidermal grafting had defined wound areas to receive a topical MAP spray or a potent corticosteroid cream once daily for seven consecutive days after operation. In situ semi-quantitative evaluations of inflammation and pigmentation were achieved by Mexameter, reflectance confocal microscopy and dermoscopy on week 1, week 4, and week 12. Topical application of MAP exerted remarkably inhibitory effect on PIH comparable to fluticasone propionate, manifested as significantly lower melanin index and papillary contrast measured by Mexameter and confocal microscopy on week 12 compared to untreated sites. Although MAP exhibited moderate anti-inflammatory effect weaker than fluticasone propionate, MAP-treated sites healed faster than steroid-treated and untreated sites. The biological activity of MAP was further studied in UVB-irradiated HaCaT cell model, which revealed MAP decreased the expression of UVB-induced α-melanocyte stimulating hormone (α-MSH) and pro-inflammatory cytokines (IL-1α, IL-6, COX-2). It also protected HaCaT cells from UVB-induced cell death and apoptosis. In conclusion, MAP could be a novel postoperational wound dressing preventing PIH associated with skin inflammation and injury.
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Affiliation(s)
- Ziqi Liu
- Department of Dermatology, Huashan Hospital, Fudan University, No. 12th Middle Wulumuqi Road, Shanghai, 200040, China
| | - Min Jiang
- Department of Dermatology, Huashan Hospital, Fudan University, No. 12th Middle Wulumuqi Road, Shanghai, 200040, China
| | - Juemin Zhao
- Department of Dermatology, Huashan Hospital, Fudan University, No. 12th Middle Wulumuqi Road, Shanghai, 200040, China
| | - Qianqian Wang
- Department of Dermatology, Huashan Hospital, Fudan University, No. 12th Middle Wulumuqi Road, Shanghai, 200040, China
| | - Chengfeng Zhang
- Department of Dermatology, Huashan Hospital, Fudan University, No. 12th Middle Wulumuqi Road, Shanghai, 200040, China
| | - Min Gao
- USUN Biochemical Technology Co., Ltd., Jiangyin, China
| | - Ming Gu
- USUN Biochemical Technology Co., Ltd., Jiangyin, China
| | - Leihong Xiang
- Department of Dermatology, Huashan Hospital, Fudan University, No. 12th Middle Wulumuqi Road, Shanghai, 200040, China.
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13
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Sun CK, Liu WM, Liao YH. Study on melanin enhanced third harmonic generation in a live cell model. BIOMEDICAL OPTICS EXPRESS 2019; 10:5716-5723. [PMID: 31799042 PMCID: PMC6865104 DOI: 10.1364/boe.10.005716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/20/2019] [Accepted: 10/04/2019] [Indexed: 05/08/2023]
Abstract
Melanin dominates the endogenous contrasts of in vivo third harmonic generation (THG) imaging of human skin. A recent study investigated the THG in melanin solution and a linear relationship between melanin concentration and THG intensity was reported, in contrast to the expected nonlinear relationship. Since melanin hydrocolloid solution is very different from the skin tissue, here we report our study on the origin of the melanin-enhanced THG by using a live cell model. Different from the previous conclusion, our live cell study has indicated an initial nonlinear process where the THG intensity was enhanced according to the 3.5th power of melanin mass density (MMD). When the MMD is higher than 11 mg/ml, a transition from the resonance-enhanced THG to the high-order hyper-Rayleigh scattering process occurs. This saturation phenomenon of the virtual-transition-based THG nonlinear process is attributed to the multi-melanosome-induced scattering within the sub-femtoliter focal volume.
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Affiliation(s)
- Chi-Kuang Sun
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Min Liu
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 10002, Taiwan
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14
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Fossa Shirata MM, Alves G, Maia Campos P. Photoageing‐related skin changes in different age groups: a clinical evaluation by biophysical and imaging techniques. Int J Cosmet Sci 2019; 41:265-273. [DOI: 10.1111/ics.12531] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 04/08/2019] [Indexed: 01/22/2023]
Affiliation(s)
- M. M. Fossa Shirata
- School of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Ribeirão Preto São Paulo Brazil
| | - G.A.D. Alves
- School of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Ribeirão Preto São Paulo Brazil
| | - P.M.B.G. Maia Campos
- School of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Ribeirão Preto São Paulo Brazil
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15
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Arginelli F, Greco M, Ciardo S, Josse G, Rossi AB, Le Digabel J, Questel E, Chester J, Pellacani G. Efficacy of D-pigment dermocosmetic lightening product for solar lentigo lesions of the hand: A randomized controlled trial. PLoS One 2019; 14:e0214714. [PMID: 31042723 PMCID: PMC6493707 DOI: 10.1371/journal.pone.0214714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 02/19/2019] [Indexed: 11/18/2022] Open
Abstract
Solar lentigo, benign lesions which mostly appear on chronically, sun-exposed surfaces, are associated with ageing. Patients are increasingly requesting a more uniform skin texture, especially for hands. Treatment options include dermoabrasion, intense pulsed light, cryotherapy, peelings, and laser therapy. Topical compounds can be employed, in alternative or associated with dermatologic procedures. The current study was designed to evaluate solar lentigo hyperpigmentation, skin architecture and clinician and patient assessments comparing a dermocosmetic lightening product (active) with a moisturizing product (control) according to clinical, digital and subjective analyses in 72 lesions over 12-month follow up period. Statistically significant differences were observed between the lesions treated with the active compared to the control in terms of papillary brightness (p = 0.03) and contrast (p = 0.03), and in the limitation of dermal-epidermal junction destructuring (p = 0.03) according to dermal-epidermal junction destructuring score at Reflectance Confocal Microscopy. Luminance (p = 0.04) and redness (p = 0.03) were improved at color analysis, and physician and patient evaluations favored the active in efficacy and patient satisfaction investigations. The dermocosmetic lightening product utilized in the current study proved to be more effective, according to clinical, digital and subjective analyses in reducing lesion hyperpigmentation, stabilizing the lesion skin architecture and increasing patient satisfaction compared to the control in a cohort of 36 subjects, over a 12-month period. Beside demonstrating the efficacy of this topical lightening product, we propose a “destructuring score”, which improves the robustness of solar lentigo’s evaluation, and can be used in future studies to standardize the quantitative comparisons of different treatment options.
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Affiliation(s)
- Federica Arginelli
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - Maurizio Greco
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvana Ciardo
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - Gwendal Josse
- Pierre Fabre Dermo-Cosmétique, Clinical Skin Research Center, Toulouse, France
| | - Ana Beatris Rossi
- Pierre Fabre Dermo-Cosmétique, Clinical Skin Research Center, Toulouse, France.,Dermatology Department, Larrey University Hospital, Toulouse, France
| | - Jimmy Le Digabel
- Pierre Fabre Dermo-Cosmétique, Clinical Skin Research Center, Toulouse, France
| | - Emmanuel Questel
- Pierre Fabre Dermo-Cosmétique, Clinical Skin Research Center, Toulouse, France
| | - Johanna Chester
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - Giovanni Pellacani
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
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16
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Rayner RL, Carville KJ, Leslie GD, Dhaliwal SS. Clinical purpura and elastosis and their correlation with skin tears in an aged population. Arch Dermatol Res 2019; 311:231-247. [PMID: 30783769 DOI: 10.1007/s00403-019-01899-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/12/2019] [Accepted: 02/14/2019] [Indexed: 01/20/2023]
Abstract
The previous research reported the results of a prospect cohort study that used logistic regression analysis to construct a risk prediction model for skin tears in individuals aged over 65 years. The model identified three baseline individual characteristics (male gender, history of STs, and history of falls) and two baseline skin manifestations (purpura and elastosis) that predicted the risk of dorsal forearm skin tears. This paper outlines the relationships between baseline skin manifestations and the risk of skin tears. Univariable logistic regression analysis was conducted of all the baseline data collected from the same-study participants to identify variables that significantly predicted purpura and elastosis at baseline. Amongst the 173 participants, 71 (41%) developed one or more skin tears, and in these participants, 52 (73.2%) displayed purpura, 41 (57.8%) had elastosis, and 30 (42.3%) exhibited both manifestations of the dorsal forearm at baseline. Four individual characteristics (age, history of skin tears, history of falls, and antiplatelet therapy) and three skin properties (pH, subepidermal low echogenicity band of the forearms, and skin thickness) were found to predict the risk of purpura. Conversely, three individual variables (age, gender, and smoking), three clinical skin variables (uneven skin pigmentation, cutis rhomboidalis nuchae, and history of actinic keratosis) and one skin property variable (collagen type IV) predicted the risk of skin elastosis. Progressive changes to the skin's structural and mechanical properties from the underlying effects of chronological ageing, and environmental and lifestyle-related influences increased the risk of purpura and elastotic skin manifestations and concomitantly increased risk of skin tears amongst participants.
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Affiliation(s)
- R L Rayner
- School of Nursing, Midwifery and Paramedicine, Curtin University, Kent St, Bentley, WA, 6102, Australia. .,Silver Chain Group, 6 Sundercombe St, Osborne Park, WA, 6017, Australia. .,School of Nursing, Midwifery and Paramedicine, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.
| | - K J Carville
- School of Nursing, Midwifery and Paramedicine, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Silver Chain Group, 6 Sundercombe St, Osborne Park, WA, 6017, Australia
| | - G D Leslie
- School of Nursing, Midwifery and Paramedicine, Curtin University, Kent St, Bentley, WA, 6102, Australia
| | - S S Dhaliwal
- School of Public Health, Curtin University, Kent St, Bentley, WA, 6102, Australia
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17
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Rao BK, John AM, Francisco G, Haroon A. Diagnostic Accuracy of Reflectance Confocal Microscopy for Diagnosis of Skin Lesions: An Update. Arch Pathol Lab Med 2018; 143:326-329. [DOI: 10.5858/arpa.2018-0124-oa] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Context.—
Histopathology is the current standard to diagnose skin disease. However, biopsy may not always be feasible, such as in patients with multiple nevi, a patient with a lesion on an aesthetically significant site, or in children. Recently, noninvasive techniques, including reflectance confocal microscopy (RCM), optical coherence tomography, and Raman spectroscopy, have enabled dermatologists to manage skin lesions in real time without the need for biopsy.
Objective.—
To report the updated diagnostic accuracy of RCM for equivocal skin lesions.
Design.—
In this study, we retrospectively reviewed our data of clinically suspicious lesions from 2010 to 2017 that were evaluated by RCM.
Results.—
Our results showed an overall sensitivity of 98.2% and specificity of 99.8%.
Conclusions.—
In conclusion, RCM is a noninvasive real-time tool with the potential to diagnose skin lesions with high accuracy and without biopsy.
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Affiliation(s)
- Babar K. Rao
- From the Department of Dermatology, Rutgers, Robert Wood Johnson Medical School, Somerset, New Jersey
| | - Ann M John
- From the Department of Dermatology, Rutgers, Robert Wood Johnson Medical School, Somerset, New Jersey
| | - Gina Francisco
- From the Department of Dermatology, Rutgers, Robert Wood Johnson Medical School, Somerset, New Jersey
| | - Attiya Haroon
- From the Department of Dermatology, Rutgers, Robert Wood Johnson Medical School, Somerset, New Jersey
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18
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Addor FAS. Beyond photoaging: additional factors involved in the process of skin aging. Clin Cosmet Investig Dermatol 2018; 11:437-443. [PMID: 30288075 PMCID: PMC6159789 DOI: 10.2147/ccid.s177448] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Studies assessing the impact of extrinsic factors on skin aging have increased during the last with the increase in life expectancy. Although most of the studies are about the sun radiation impact, many factors should be considered in elderly people, beyond environmental conditions. Lifestyle factors, like diet, sleeping, smoking, should be analyzed carefully, as common age-related conditions (menopause, diabetes, pulmonary diseases, etc.). All these factors could accelerate the natural decline of skin structure and functions, possibly affecting the responses to treatments and drugs. This review demonstrates that growing evidence regarding environmental factors that are associated with lifestyle and comorbidities deserve greater attention from researchers and dermatologists and may require new approaches in the management of skin aging.
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19
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Pond D, McBride A, Davids L, Reddy B, Limbert G. Microstructurally-based constitutive modelling of the skin – Linking intrinsic ageing to microstructural parameters. J Theor Biol 2018; 444:108-123. [DOI: 10.1016/j.jtbi.2018.01.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/21/2017] [Accepted: 01/15/2018] [Indexed: 10/18/2022]
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20
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Nakamura M, Haarmann-Stemmann T, Krutmann J, Morita A. Alternative test models for skin ageing research. Exp Dermatol 2018; 27:495-500. [DOI: 10.1111/exd.13519] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Motoki Nakamura
- Department of Geriatric and Environmental Dermatology; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
| | | | - Jean Krutmann
- IUF-Leibniz Research Institute for Environmental Medicine; Düsseldorf Germany
- Medical Faculty; Heinrich-Heine-University; Düsseldorf Germany
| | - Akimichi Morita
- Department of Geriatric and Environmental Dermatology; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
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21
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Martini APM, Maia Campos PMBG. Influence of visible light on cutaneous hyperchromias: Clinical efficacy of broad-spectrum sunscreens. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2018; 34:241-248. [DOI: 10.1111/phpp.12377] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/18/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Ana Paula M. Martini
- Faculty of Pharmaceutical Sciences of Ribeirão Preto; University of São Paulo; Ribeirão Preto Brazil
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22
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Josse G, Le Digabel J, Questel E. Protection against summer solar lentigo over-pigmentation with a SPF30 daily cream. Skin Res Technol 2018; 24:485-489. [PMID: 29446160 DOI: 10.1111/srt.12458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2017] [Indexed: 02/03/2023]
Abstract
BACKGROUND/PURPOSE The aim of this study was to measure lentigines' pigmentation over a long period of time and evaluate if summer over-pigmentation can be avoided by the use a SPF30 day skin cream. METHODS Seventeen healthy female volunteers aged 50 and over and presenting lentigines participated in the study from spring to summer. Throughout the study, all subjects applied a SPF30 daily skin cream to only one hand. Color measurements of the target lesions were performed with a chromameter and with a color-calibrated camera. Target lesions were also imaged with in vivo reflectance confocal microscopy (RCM). A specific procedure for re-registering the images was developed to ensure that the same papillae were measured over time. RESULTS Both color measurement methods, chromametry and color-calibrated camera, showed that lentigines treated over time with the SPF30 day skin cream were significantly lighter than the non-treated lentigines. The RCM images showed a decrease in the papillary contrast for the treated lentigines. CONCLUSION This study shows that this over-pigmentation can be avoided using a SPF30 day skin cream. Moreover, we have demonstrated that very fine re-registration of the RCM images is possible and ensures a more robust analysis.
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Affiliation(s)
- G Josse
- Pierre Fabre Dermo-Cosmétique, Centre de Recherche sur la Peau, Toulouse, France
| | - J Le Digabel
- Pierre Fabre Dermo-Cosmétique, Centre de Recherche sur la Peau, Toulouse, France
| | - E Questel
- Pierre Fabre Dermo-Cosmétique, Centre de Recherche sur la Peau, Toulouse, France
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23
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Sun W, Wu J, Qian H, Zhao J, Xiang L, Zhang C. Objective evaluation of the effects of intense pulsed light treatment on Asian skin by reflectance confocal microscopy analysis. Lasers Med Sci 2017; 33:779-784. [DOI: 10.1007/s10103-017-2419-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 12/07/2017] [Indexed: 01/05/2023]
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25
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Heydari S, Ghanbarzadeh S, Anoush B, Ranjkesh M, Javadzadeh Y, Kouhsoltani M, Hamishehkar H. Nanoethosomal formulation of gammaoryzanol for skin-aging protection and wrinkle improvement: a histopathological study. Drug Dev Ind Pharm 2017; 43:1154-1162. [PMID: 28277843 DOI: 10.1080/03639045.2017.1300169] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Free radical scavengers and antioxidants, with the main focus on enhanced targeting to the skin layers, can provide protection against skin ageing. OBJECTIVE The aim of the present study was to prepare nanoethosomal formulation of gammaoryzanol (GO), a water insoluble antioxidant, for its dermal delivery to prevent skin aging. METHODS Nanoethosomal formulation was prepared by a modified ethanol injection method and characterized by using laser light scattering, scanning electronic microscope (SEM) and X-ray diffraction (XRD) techniques. The effects of formulation parameters on nanoparticle size, encapsulation efficiency percent (EE%) and loading capacity percent (LC%) were investigated. Antioxidant activity of GO-loaded formulation was investigated in vitro using normal African green monkey kidney fibroblast cells (Vero). The effect of control and GO-loaded nanoethosomal formulation on superoxide dismutase (SOD) and malondialdehyde (MDA) content of rat skin was also probed. Furthermore, the effect of GO-loaded nanoethosomes on skin wrinkle improvement was studied by dermoscopic and histological examination on healthy humans and UV-irradiated rats, respectively. RESULTS The optimized nanoethosomal formulation showed promising characteristics including narrow size distribution 0.17 ± 0.02, mean diameter of 98.9 ± 0.05 nm, EE% of 97.12 ± 3.62%, LC% of 13.87 ± 1.36% and zeta potential value of -15.1 ± 0.9 mV. The XRD results confirmed uniform drug dispersion in the nanoethosomes structure. In vitro and in vivo antioxidant studies confirmed the superior antioxidant effect of GO-loaded nanoethosomal formulation compared with control groups (blank nanoethosomes and GO suspension). CONCLUSIONS Nanoethosomes was a promising carrier for dermal delivery of GO and consequently had superior anti-aging effect.
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Affiliation(s)
- Saman Heydari
- a Institute for Stem Cell and Regenerative Medicine and Students' Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Saeed Ghanbarzadeh
- b Zanjan Pharmaceutical Nanotechnology Research Center and Department of Pharmaceutics, Faculty of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Behzad Anoush
- c Dermatology & Dermopharmacy Research Team and Department of Dermatology, Sina Hospital , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Mohammadreza Ranjkesh
- c Dermatology & Dermopharmacy Research Team and Department of Dermatology, Sina Hospital , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Yousef Javadzadeh
- d Biotechnology Research Center and Faculty of Pharmacy , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Maryam Kouhsoltani
- e Department of Oral & Maxillofacial Pathology, Faculty of Dentistry , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Hamed Hamishehkar
- f Drug Applied Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
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26
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Martini APM, Mercurio DG, Maia Campos PMBG. Assessment of skin pigmentation by confocal microscopy: Influence of solar exposure and protection habits on cutaneous hyperchromias. J Cosmet Dermatol 2017; 16:364-369. [PMID: 28160420 DOI: 10.1111/jocd.12307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND Cutaneous hyperchromias are disorders of skin pigmentation involving an increase of melanin production and its irregular accumulation in skin cells. It is known that the use of sunscreens helps to prevent changes in the skin pigmentation pattern, but the structural and morphological alterations that occur in the different types of hyperpigmentations need better elucidation. OBJECTIVE To assess the influence of solar exposure and protection habits on the pattern of skin pigmentation using reflectance confocal microscopy (RCM). METHODS Forty volunteers aged 18-39 years with skin hyperpigmentation participated in the study. Skin characterization was performed by imaging techniques and by assessing the habits of solar exposure and protection by applying questionnaires to the volunteers. RCM was used to record sequences of confocal sections at areas of interest and to examine cell shape and brightness in the basal cell layer of the lesion and in normal perilesional skin. Furthermore, high-resolution images were obtained for analysis of the spots. RESULTS Sunlight influences the number and location of spots as the face of volunteers with higher solar exposure was covered with spots, whereas volunteers with less exposure had fewer spots located in the nose and cheeks region due to greater exposure of these areas to the sun. CONCLUSION The data showed the importance of sun protection for preventing changes in the pattern of skin pigmentation, and RCM proved to be an important tool for skin characterization.
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Affiliation(s)
- Ana Paula M Martini
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Daiane G Mercurio
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
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27
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Ghanta S, Jordan MI, Kose K, Brooks DH, Rajadhyaksha M, Dy JG. A Marked Poisson Process Driven Latent Shape Model for 3D Segmentation of Reflectance Confocal Microscopy Image Stacks of Human Skin. IEEE TRANSACTIONS ON IMAGE PROCESSING : A PUBLICATION OF THE IEEE SIGNAL PROCESSING SOCIETY 2017; 26:172-184. [PMID: 27723590 PMCID: PMC5258843 DOI: 10.1109/tip.2016.2615291] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Segmenting objects of interest from 3D data sets is a common problem encountered in biological data. Small field of view and intrinsic biological variability combined with optically subtle changes of intensity, resolution, and low contrast in images make the task of segmentation difficult, especially for microscopy of unstained living or freshly excised thick tissues. Incorporating shape information in addition to the appearance of the object of interest can often help improve segmentation performance. However, the shapes of objects in tissue can be highly variable and design of a flexible shape model that encompasses these variations is challenging. To address such complex segmentation problems, we propose a unified probabilistic framework that can incorporate the uncertainty associated with complex shapes, variable appearance, and unknown locations. The driving application that inspired the development of this framework is a biologically important segmentation problem: the task of automatically detecting and segmenting the dermal-epidermal junction (DEJ) in 3D reflectance confocal microscopy (RCM) images of human skin. RCM imaging allows noninvasive observation of cellular, nuclear, and morphological detail. The DEJ is an important morphological feature as it is where disorder, disease, and cancer usually start. Detecting the DEJ is challenging, because it is a 2D surface in a 3D volume which has strong but highly variable number of irregularly spaced and variably shaped "peaks and valleys." In addition, RCM imaging resolution, contrast, and intensity vary with depth. Thus, a prior model needs to incorporate the intrinsic structure while allowing variability in essentially all its parameters. We propose a model which can incorporate objects of interest with complex shapes and variable appearance in an unsupervised setting by utilizing domain knowledge to build appropriate priors of the model. Our novel strategy to model this structure combines a spatial Poisson process with shape priors and performs inference using Gibbs sampling. Experimental results show that the proposed unsupervised model is able to automatically detect the DEJ with physiologically relevant accuracy in the range 10- 20 μm .
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Newton VL, Bradley RS, Seroul P, Cherel M, Griffiths CEM, Rawlings AV, Voegeli R, Watson REB, Sherratt MJ. Novel approaches to characterize age-related remodelling of the dermal-epidermal junction in 2D, 3D andin vivo. Skin Res Technol 2016; 23:131-148. [DOI: 10.1111/srt.12312] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2016] [Indexed: 12/21/2022]
Affiliation(s)
- V. L. Newton
- Centre for Dermatology Research; Institute of Inflammation & Repair; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
- The Dermatology Centre; Salford Royal NHS Foundation Trust; Salford UK
| | - R. S. Bradley
- School of Materials; The University of Manchester; Manchester UK
| | | | | | - C. E. M. Griffiths
- Centre for Dermatology Research; Institute of Inflammation & Repair; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
- The Dermatology Centre; Salford Royal NHS Foundation Trust; Salford UK
| | | | - R. Voegeli
- DSM Nutritional Products Ltd; Kaiseraugst Switzerland
| | - R. E. B. Watson
- Centre for Dermatology Research; Institute of Inflammation & Repair; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
- The Dermatology Centre; Salford Royal NHS Foundation Trust; Salford UK
| | - M. J. Sherratt
- Centre for Tissue Injury and Repair; Institute of Inflammation & Repair; Manchester Academic Health Science Centre; The University of Manchester; Manchester UK
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Kawasaki K, Yamanishi K, Yamada H. Age-related morphometric changes of inner structures of the skin assessed byin vivoreflectance confocal microscopy. Int J Dermatol 2014; 54:295-301. [DOI: 10.1111/ijd.12220] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Kaori Kawasaki
- Department of Dermatology; Hyogo College of Medicine; Nishinomiya Japan
- Department of Dermatology; Nara Hospital, Kinki University School of Medicine; Ikoma Japan
- Anti-Aging Center; Kinki University; Ikoma Japan
| | | | - Hidekazu Yamada
- Department of Dermatology; Hyogo College of Medicine; Nishinomiya Japan
- Department of Dermatology; Nara Hospital, Kinki University School of Medicine; Ikoma Japan
- Anti-Aging Center; Kinki University; Ikoma Japan
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30
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Yin L, Coelho SG, Ebsen D, Smuda C, Mahns A, Miller SA, Beer JZ, Kolbe L, Hearing VJ. Epidermal gene expression and ethnic pigmentation variations among individuals of Asian, European and African ancestry. Exp Dermatol 2014; 23:731-5. [DOI: 10.1111/exd.12518] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/18/2014] [Indexed: 12/25/2022]
Affiliation(s)
- Lanlan Yin
- Laboratory of Cell Biology; National Cancer Institute; National Institutes of Health; Bethesda MD USA
| | - Sergio G. Coelho
- Laboratory of Cell Biology; National Cancer Institute; National Institutes of Health; Bethesda MD USA
| | - Dominik Ebsen
- Laboratory of Cell Biology; National Cancer Institute; National Institutes of Health; Bethesda MD USA
| | | | - Andre Mahns
- R&D Skin Research; Beiersdorf AG; Hamburg Germany
| | - Sharon A. Miller
- Center for Devices and Radiological Health, Food and Drug Administration; Silver Spring MD USA
| | - Janusz Z. Beer
- Center for Devices and Radiological Health, Food and Drug Administration; Silver Spring MD USA
| | - Ludger Kolbe
- R&D Skin Research; Beiersdorf AG; Hamburg Germany
| | - Vincent J. Hearing
- Laboratory of Cell Biology; National Cancer Institute; National Institutes of Health; Bethesda MD USA
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31
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Liao YH, Kuo WC, Chou SY, Tsai CS, Lin GL, Tsai MR, Shih YT, Lee GG, Sun CK. Quantitative analysis of intrinsic skin aging in dermal papillae by in vivo harmonic generation microscopy. BIOMEDICAL OPTICS EXPRESS 2014; 5:3266-79. [PMID: 25401037 PMCID: PMC4230862 DOI: 10.1364/boe.5.003266] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 07/25/2014] [Accepted: 08/08/2014] [Indexed: 05/20/2023]
Abstract
Chronological skin aging is associated with flattening of the dermal-epidermal junction (DEJ), but to date no quantitative analysis focusing on the aging changes in the dermal papillae (DP) has been performed. The aim of the study is to determine the architectural changes and the collagen density related to chronological aging in the dermal papilla zone (DPZ) by in vivo harmonic generation microscopy (HGM) with a sub-femtoliter spatial resolution. We recruited 48 Asian subjects and obtained in vivo images on the sun-protected volar forearm. Six parameters were defined to quantify 3D morphological changes of the DPZ, which we analyzed both manually and computationally to study their correlation with age. The depth of DPZ, the average height of isolated DP, and the 3D interdigitation index decreased with age, while DP number density, DP volume, and the collagen density in DP remained constant over time. In vivo high-resolution HGM technology has uncovered chronological aging-related variations in DP, and sheds light on real-time quantitative skin fragility assessment and disease diagnostics based on collagen density and morphology.
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Affiliation(s)
- Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei 10002, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Cheng Kuo
- Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Sin-Yo Chou
- Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Cheng-Shiun Tsai
- Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Guan-Liang Lin
- Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Ming-Rung Tsai
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
| | - Yuan-Ta Shih
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
| | - Gwo-Giun Lee
- Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chi-Kuang Sun
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
- Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
- Research Center for Applied Sciences and Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
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Mizukoshi K, Yonekura K, Futagawa M, Nakamura T, Hirayama K, Takahashi K. Changes in dermal papilla structures due to aging in the facial cheek region. Skin Res Technol 2014; 21:224-31. [PMID: 25156803 DOI: 10.1111/srt.12180] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND/PURPOSE In the past, it has been possible to measure the dermal papilla structures which are undulations between the epidermis and dermis by noninvasive method. However, almost all of previous studies were not intended to measure facial skin but another site of body. Here, we investigated age-dependent alterations for dermal papilla structures in the facial cheek region after elucidating the difference of characteristics between the body site. METHODS The surface of the dermis was observed under scanning electron microscope (SEM) using face and abdominal skin biopsy samples. A total of 90 Japanese women were investigated by in vivo confocal laser microscope (CLSM). The number and the shape in the horizontal cross-sectional images of the dermal papilla were analyzed. RESULTS The facial skin had different characteristics in comparison to the abdominal skin by SEM observation. Under CLSM observation, we found abnormal dermal papilla structures which were accompanied by spots or enlarged pore areas and eliminated these structures from our analysis. We revealed a decrease in the number of normal dermal papilla structures with age and large individual differences at younger ages. CONCLUSION We found abnormal dermal papilla structures and differences in the dermal papilla structures between face and other body site. With these taken into consideration, we could precisely investigate the aging alteration of normal dermal papilla structures in the face.
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Affiliation(s)
- K Mizukoshi
- POLA Chemical Industries Inc, Yokohama, Japan
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33
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Trojahn C, Dobos G, Schario M, Ludriksone L, Blume-Peytavi U, Kottner J. Relation between skin micro-topography, roughness, and skin age. Skin Res Technol 2014; 21:69-75. [PMID: 24889351 DOI: 10.1111/srt.12158] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND The topography of the skin surface consists of lines, wrinkles, and scales. Primary and secondary lines form a network like structure that may be identified as polygons. Skin surface roughness measurements are widely applied in dermatological research and practice but the relation between roughness parameters and their anatomical equivalents are unclear. This study aimed to investigate whether the number of closed polygons (NCP) per measurement field can be used as a reliable parameter to measure skin surface topography. For this purpose, we analysed the relation between skin surface roughness parameters and NCP in different age groups. METHODS Images of the volar forearm skin of 38 subjects (14 children, 12 younger, and 12 older adults) were obtained with the VisioScan VC98. The NCP was counted by three independent researchers and selected roughness parameters were measured. Interrater reliability of counting the number of closed polygons and correlations between NCP, roughness parameters, and age were calculated. RESULTS The mean NCP/mm² in children was 3.1 (SD 1.1), in younger adults 1.0 (SD 0.7), and in older adults 1.0 (SD 0.9). The interrater reliability was 0.9. A negative correlation of NCP/mm² with age was observed, whereas measured roughness parameters were positively associated with age. NCP/mm² was weakly related to skin roughness. CONCLUSION The NCP/mm² is a reproducible parameter for characterizing the skin surface topography. It is proposed as an additional parameter in dermatological research and practice because it represents distinct aspects of the cutaneous profile not covered by established roughness parameters.
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Affiliation(s)
- C Trojahn
- Department of Dermatology and Allergy, Clinical Research Center for Hair and Skin Science, Charité-Universitätsmedizin Berlin, Berlin, Germany
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34
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Kutlu Haytoglu NS, Gurel MS, Erdemir A, Falay T, Dolgun A, Haytoglu TG. Assessment of skin photoaging with reflectance confocal microscopy. Skin Res Technol 2014; 20:363-72. [DOI: 10.1111/srt.12127] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2014] [Indexed: 11/28/2022]
Affiliation(s)
- N. S. Kutlu Haytoglu
- Department of Dermatology; Istanbul Education and Research Hospital; Istanbul Turkey
| | - M. S. Gurel
- Department of Dermatology; Istanbul Education and Research Hospital; Istanbul Turkey
| | - A. Erdemir
- Department of Dermatology; Istanbul Education and Research Hospital; Istanbul Turkey
| | - T. Falay
- Department of Dermatology; Istanbul Education and Research Hospital; Istanbul Turkey
| | - A. Dolgun
- Department of Biostatistics; Hacettepe University Faculty of Medicine; Ankara Turkey
| | - T. G. Haytoglu
- Department of Plastic Surgery; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul Turkey
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35
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Raphael AP, Kelf TA, Wurm EMT, Zvyagin AV, Soyer HP, Prow TW. Computational characterization of reflectance confocal microscopy features reveals potential for automated photoageing assessment. Exp Dermatol 2013; 22:458-63. [DOI: 10.1111/exd.12176] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Anthony P. Raphael
- Dermatology Research Centre; School of Medicine; Translational Research Institute; Princess Alexandra Hospital; The University of Queensland; Brisbane Qld Australia
| | - Timothy A. Kelf
- Dermatology Research Centre; School of Medicine; Translational Research Institute; Princess Alexandra Hospital; The University of Queensland; Brisbane Qld Australia
- MQ BioFocus Research Centre; Macquarie University; Sydney NSW Australia
| | - Elizabeth M. T. Wurm
- Dermatology Research Centre; School of Medicine; Translational Research Institute; Princess Alexandra Hospital; The University of Queensland; Brisbane Qld Australia
| | - Andrei V. Zvyagin
- MQ BioFocus Research Centre; Macquarie University; Sydney NSW Australia
| | - Hans Peter Soyer
- Dermatology Research Centre; School of Medicine; Translational Research Institute; Princess Alexandra Hospital; The University of Queensland; Brisbane Qld Australia
| | - Tarl W. Prow
- Dermatology Research Centre; School of Medicine; Translational Research Institute; Princess Alexandra Hospital; The University of Queensland; Brisbane Qld Australia
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36
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Sevrain D, Le Grand Y, Buhé V, Jeanmaire C, Pauly G, Carré JL, Misery L, Lebonvallet N. Two-photon microscopy of dermal innervation in a human re-innervated model of skin. Exp Dermatol 2013; 22:290-1. [DOI: 10.1111/exd.12108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2013] [Indexed: 11/29/2022]
Affiliation(s)
- David Sevrain
- Laboratoire de Spectrométrie et Optique Laser; Université de Brest; UEB; Brest; France
| | - Yann Le Grand
- Laboratoire de Spectrométrie et Optique Laser; Université de Brest; UEB; Brest; France
| | - Virginie Buhé
- Laboratoire des Neurosciences de Brest; Université de Brest; LNB EA4685 UEB; Brest; France
| | - Christine Jeanmaire
- BASF Beauty Creations; BASF Beauty Care Solutions France SAS; Pulnoy; France
| | - Gilles Pauly
- BASF Beauty Creations; BASF Beauty Care Solutions France SAS; Pulnoy; France
| | - Jean-Luc Carré
- Laboratoire des Neurosciences de Brest; Université de Brest; LNB EA4685 UEB; Brest; France
| | - Laurent Misery
- Laboratoire des Neurosciences de Brest; Université de Brest; LNB EA4685 UEB; Brest; France
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