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Wang S, Fan X, Zhang Z, Su Z, Ding Y, Yang H, Zhang X, Wang J, Zhang J, Hu P. A Skin-Inspired High-Performance Tactile Sensor for Accurate Recognition of Object Softness. ACS NANO 2024. [PMID: 38875126 DOI: 10.1021/acsnano.4c04100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2024]
Abstract
High-performance tactile sensors with skin-sensing properties are crucial for intelligent perception in next-generation smart devices. However, previous studies have mainly focused on the sensitivity and response range of tactile sensation while neglecting the ability to recognize object softness. Therefore, achieving a precise perception of the softness remains a challenge. Here, we report an integrated tactile sensor consisting of a central hole gradient structure pressure sensor and a planar structure strain sensor. The recognition of softness and tactile perception is achieved through the synergistic effect of pressure sensors that sense the applied pressure and strain sensors that recognize the strain of the target object. The results indicate that the softness evaluation parameter (SC) of the integrated structural tactile sensor increases from 0.14 to 0.47 along with Young's modulus of the object decreasing from 2.74 to 0.45 MPa, demonstrating accurate softness recognition. It also exhibits a high sensitivity of 10.55 kPa-1 and an ultrawide linear range of 0-1000 kPa, showing an excellent tactile sensing capability. Further, an intelligent robotic hand system based on integrated structural tactile sensors was developed, which can identify the softness of soft foam and glass and grasp them accurately, indicating human skin-like sensing and grasping capabilities.
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Affiliation(s)
- Shuai Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
- MOE Key Lab of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China
| | - Xinyang Fan
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
| | - Zaoxu Zhang
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Zhen Su
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - YaNan Ding
- MOE Key Lab of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China
| | - Hongying Yang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Xin Zhang
- MOE Key Lab of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China
| | - Jinzhong Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Jia Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
- MOE Key Lab of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China
| | - PingAn Hu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
- MOE Key Lab of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China
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Amin R, Rancan F, Hillmann K, Blume‐Peytavi U, Vogt A, Kottner J. Effects of a leave-on product on the strength of the dermoepidermal junction: An exploratory, intraindividual, randomized controlled trial in older adults with dry skin. Health Sci Rep 2024; 7:e1985. [PMID: 38505682 PMCID: PMC10949320 DOI: 10.1002/hsr2.1985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/08/2024] [Accepted: 03/03/2024] [Indexed: 03/21/2024] Open
Abstract
Background and Aims Skin aging is associated with dry skin and a decrease of the strength of the dermoepidermal adhesion, which increases the risk for lacerations (skin tears). Application of leave-on products improves dry skin and seems to reduce skin tear incidence. The aim of this study was to measure the effects of a humectant containing leave-on product on the strength of the dermoepidermal junction in older adult participants with dry skin. Methods A randomized controlled trial using a split body design was conducted. One forearm was randomly selected and treated with a lipophilic leave-on product containing 5% urea for 8 weeks. The other forearm was the control. The parameters stratum corneum hydration (SCH), transepidermal water loss, pH, roughness, epidermal thickness and skin stiffness were measured at the baseline, Weeks 4 and 8. At Week 8, suction blisters were created and time to blistering was measured. Blister roofs and interstitial fluid were analyzed for Interleukin-1α, 6 and 8. Results Twelve participants were included. After 8 weeks treatment, SCH was higher (median difference 11.6 AU), and the overall dry skin score (median difference -1) and median roughness (Rz difference -12.2 µm) were lower compared to the control arms. The median group difference for Interleukin-1α was -452 fg/µg total protein (TP) in the blister roofs and -2.2 fg/µg TP in the blister fluids. The median time to blister formation was 7.7 min higher compared to the control arms. Conclusion The regular application of humectant containing leave-on products improves dry skin and seems to lower inflammation and contribute to the strengthening of the dermoepidermal adhesion. This partly explains how the use of topical leave-on products helps to prevent skin tears.
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Affiliation(s)
- Ruhul Amin
- Department of Dermatology, Venereology and Allergology, Clinical Research Center for Hair and Skin Science, Charitéplatz 1, Charité—Universitätsmedizin Berlincorporate member of Freie Universität Berlin and Humboldt‐Universität zu BerlinBerlinGermany
- BCSIR Laboratories DhakaBangladesh Council of Scientific and Industrial ResearchDhakaBangladesh
| | - Fiorenza Rancan
- Department of Dermatology, Venereology and Allergology, Clinical Research Center for Hair and Skin Science, Charitéplatz 1, Charité—Universitätsmedizin Berlincorporate member of Freie Universität Berlin and Humboldt‐Universität zu BerlinBerlinGermany
| | - Kathrin Hillmann
- Department of Dermatology, Venereology and Allergology, Clinical Research Center for Hair and Skin Science, Charitéplatz 1, Charité—Universitätsmedizin Berlincorporate member of Freie Universität Berlin and Humboldt‐Universität zu BerlinBerlinGermany
| | - Ulrike Blume‐Peytavi
- Department of Dermatology, Venereology and Allergology, Clinical Research Center for Hair and Skin Science, Charitéplatz 1, Charité—Universitätsmedizin Berlincorporate member of Freie Universität Berlin and Humboldt‐Universität zu BerlinBerlinGermany
| | - Annika Vogt
- Department of Dermatology, Venereology and Allergology, Clinical Research Center for Hair and Skin Science, Charitéplatz 1, Charité—Universitätsmedizin Berlincorporate member of Freie Universität Berlin and Humboldt‐Universität zu BerlinBerlinGermany
| | - Jan Kottner
- Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt‐Universität zu Berlin, Institute of Clinical Nursing Science, Charitéplatz 1BerlinGermany
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Seo JY, You SW, Gu KN, Kim H, Shin JG, Leem S, Hwang BK, Kim Y, Kang NG. Longitudinal study of the interplay between the skin barrier and facial microbiome over 1 year. Front Microbiol 2023; 14:1298632. [PMID: 38033568 PMCID: PMC10687563 DOI: 10.3389/fmicb.2023.1298632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
Skin is a diverse ecosystem that provides a habitat for microorganisms. The skin condition and the skin microbiome interact each other under diverse environmental conditions. This study was conducted on 10 study participants for a one-year, from September 2020 to August 2021, to investigate the variability of skin microbiome and skin biophysical parameters [TEWL, hydration, and elasticity (R5)] according to season, and to understand the interplay between skin microbiome and skin characteristics. We identified that Cutibacterium, Corynebacterium, Staphyloccocus, unclassified genus within Neisseriaceae, and Streptococcus were major skin microbial taxa at the genus level, and fluctuated with the seasons. Cutibacterium was more abundant in winter, while Corynebacterium, Staphylococcus, and Streptococcus were more abundant in summer. Notably, Cutibacterium and skin barrier parameter, TEWL, exhibited a co-decreasing pattern from winter to summer and showed a significant association between Cutibacterium and TEWL. Furthermore, functional profiling using KEGG provided clues on the impact of Cutibacterium on the host skin barrier. This study enhances our understanding of the skin microbiome and its interplay with skin characteristics and highlights the importance of seasonal dynamics in shaping skin microbial composition.
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Fujimoto Y, Yuri Y, Kato Y, Kinoshita S, Tamiya H. Intra- and inter-rater reliabilities of skin mechanical properties measured in healthy individuals using skin elasticity meter. Ann Med 2023; 55:2279747. [PMID: 37967233 PMCID: PMC10653741 DOI: 10.1080/07853890.2023.2279747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 10/31/2023] [Indexed: 11/17/2023] Open
Abstract
PURPOSE The aim of this study is to establish a standardized measurement method and to examine the intra- and inter-reliabilities and absolute reliability of measuring skin mechanical properties using a skin elasticity meter (Cutometer®). METHODS Ten healthy participated in the study. Skin mechanical properties were measured at four sites: upper arm, lower arm, upper leg and lower leg on both sides in supine position using a non-invasive skin elasticity meter by two trained different raters. The measurements include quantitative indices of the maximal distensibility (R0), elasticity (R2, R5, R7), and viscoelasticity (R6). Intra- and inter- relative reliabilities were determined using the intraclass correlation coefficient (ICC) (1,1) and ICC (2,1) methods, respectively. The absolute reliability was assessed via the Bland-Altman analysis. Moreover, we evaluated the minimal detectable change at a 95% confidence level (MDC95). RESULTS At each site, the ICC (1,1) values were >0.90, and the ICC (2,1) values were >0.50. The Bland-Altman analysis did not reveal any fixed errors, and several sites and parameters have proportional errors. CONCLUSIONS In this study, intra- and inter-reliabilities were measured at "excellent" and more than "moderate" levels, respectively. However, because some proportional errors were observed, the limits of reliability agreement should be considered when using the proposed methods. We believe that the results of this study can be applied to clinical research in field of rehabilitation treatment.
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Affiliation(s)
- Yudai Fujimoto
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences, Osaka, Japan
- Department of Rehabilitation, Osaka International Cancer Institute, Osaka, Japan
| | - Yoshimi Yuri
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences, Osaka, Japan
| | - Yuji Kato
- Department of Rehabilitation, Osaka International Cancer Institute, Osaka, Japan
| | - Shota Kinoshita
- Department of Rehabilitation, Osaka International Cancer Institute, Osaka, Japan
| | - Hironari Tamiya
- Department of Rehabilitation, Osaka International Cancer Institute, Osaka, Japan
- Department of Orthopaedic surgery (Musculoskeletal Oncology Service), Osaka International Cancer Institute, Osaka, Japan
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Suarez MF, Schmitt HM, Kuhn MS, Watkins T, Hake KM, Weisz T, Flynn EJ, Elliott MH, Hauser MA, Stamer WD. Genetic background determines severity of Loxl1-mediated systemic and ocular elastosis in mice. Dis Model Mech 2023; 16:dmm050392. [PMID: 37905384 PMCID: PMC10668029 DOI: 10.1242/dmm.050392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/20/2023] [Indexed: 11/02/2023] Open
Abstract
Pseudoexfoliation syndrome (PEX) is a systemic, age-related disorder characterized by elastosis and extracellular matrix deposits. Its most significant ocular manifestation is an aggressive form of glaucoma associated with variants in the gene encoding lysyl oxidase-like 1 (LOXL1). Depending upon the population, variants in LOXL1 can impart risk or protection for PEX, suggesting the importance of genetic context. As LOXL1 protein levels are lower and the degree of elastosis is higher in people with PEX, we studied Loxl1-deficient mice on three different genetic backgrounds: C57BL/6 (BL/6), 129S×C57BL/6 (50/50) and 129S. Early onset and high prevalence of spontaneous pelvic organ prolapse in BL/6 Loxl1-/- mice necessitated the study of mice that were <2 months old. Similar to pelvic organ prolapse, most elastosis endpoints were the most severe in BL/6 Loxl1-/- mice, including skin laxity, pulmonary tropoelastin accumulation, expansion of Schlemm's canal and dilation of intrascleral veins. Interestingly, intraocular pressure was elevated in 50/50 Loxl1-/- mice, depressed in BL/6 Loxl1-/- mice and unchanged in 129S Loxl1-/- mice compared to that of control littermates. Overall, the 129S background was protective against most elastosis phenotypes studied. Thus, repair of elastin-containing tissues is impacted by the abundance of LOXL1 and genetic context in young animals.
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Affiliation(s)
- Maria F. Suarez
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
| | - Heather M. Schmitt
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
- Duke Molecular Physiology Institute, Duke University, Durham, NC 27701, USA
| | - Megan S. Kuhn
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
| | - TeddiJo Watkins
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
| | - Kristyn M. Hake
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
- Duke Molecular Physiology Institute, Duke University, Durham, NC 27701, USA
| | - Tara Weisz
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
| | - Edward J. Flynn
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
| | - Michael H. Elliott
- Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Michael A. Hauser
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
- Duke Molecular Physiology Institute, Duke University, Durham, NC 27701, USA
- Department of Medicine, Duke University, Durham, NC 27710, USA
| | - W. Daniel Stamer
- Department of Ophthalmology, Duke University, Durham, NC 27705, USA
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Tarshish E, Hermoni K, Muizzuddin N. Effect of Lumenato a Tomato derived oral supplement on improving skin barrier strength. Skin Res Technol 2023; 29:e13504. [PMID: 38009018 PMCID: PMC10632383 DOI: 10.1111/srt.13504] [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: 10/02/2023] [Accepted: 10/09/2023] [Indexed: 11/28/2023]
Abstract
INTRODUCTION Improvement of skin barrier strength could lead to healthy and youthful appearance. "Beauty inside-out" approach using nutraceuticals such as tomato derived carotenoids to support skin barrier strength could be of benefit to the ageing population. METHOD A panel of 60 female subjects were provided with the Lumenato capsules (containing carotenoids) or placebo capsules as nutritional supplements for 3 months. Skin health and barrier function were observed using evaporimeter which measures trans epidermal water loss (TEWL). Barrier strength was determined by study of the number of strippings required to disrupt skin barrier and barrier repair was observed in terms of TEWL a few hours after barrier disruption. Cutometer was used to observe skin firmness and elasticity. Measurements were obtained before treatment and after 4 and 12 weeks of use. RESULTS Results indicated a statistically significant improvement (p < 0.05) in skin barrier strength; a higher number of strippings were required to disrupt skin barrier after 12 weeks of supplement use. There was also a significant improvement in skin firmness and elasticity as observed with a cutometer. CONCLUSION Based on the confines and conditions of this study, oral supplementation with Lumenato resulted in significant improvement in skin barrier as well as skin firmness and elasticity.
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Kalwa PL, Schäffer TE. Water flow elastography - A promising tool to measure tissue stiffness during minimally invasive surgery. J Mech Behav Biomed Mater 2023; 145:106004. [PMID: 37418969 DOI: 10.1016/j.jmbbm.2023.106004] [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: 12/14/2022] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/09/2023]
Abstract
Mechanical properties are important markers for pathological processes in tissue. Elastography techniques are therefore becoming more and more useful for diagnostics. In minimally invasive surgery (MIS), however, the probe size is limited and the handling is restricted, thereby excluding the application of most established elastography techniques. In this paper we introduce water flow elastography (WaFE) as a new technique that benefits from a small and inexpensive probe. This probe flows pressurized water against the sample surface to locally indent it. The volume of the indentation is measured with a flow meter. We use finite element simulations to find the relation between the indentation volume, the water pressure, and the Young's modulus of the sample. We used WaFE to measure the Young's modulus of silicone samples and porcine organs, finding agreement within 10% to measurements with a commercial material testing machine. Our results show that WaFE is a promising technique for providing local elastography in MIS.
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Affiliation(s)
- Paul L Kalwa
- Institute of Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076, Tübingen, Germany
| | - Tilman E Schäffer
- Institute of Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076, Tübingen, Germany.
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Nishikori S, Yasuda J, Murata K, Takegaki J, Harada Y, Shirai Y, Fujita S. Resistance training rejuvenates aging skin by reducing circulating inflammatory factors and enhancing dermal extracellular matrices. Sci Rep 2023; 13:10214. [PMID: 37353523 PMCID: PMC10290068 DOI: 10.1038/s41598-023-37207-9] [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: 05/13/2023] [Accepted: 06/18/2023] [Indexed: 06/25/2023] Open
Abstract
Aerobic training (AT) is suggested to be an effective anti-aging strategy for skin aging. However, the respective effects of resistance training (RT) have not been studied. Therefore, we compared the effects of AT and RT on skin aging in a 16-week intervention in 61 healthy sedentary middle-aged Japanese women. Data from 56 women were available for analysis. Both interventions significantly improved skin elasticity and upper dermal structure, and RT also improved dermal thickness. After the training intervention, expression of dermal extracellular matrix-related genes was increased in normal human primary dermal fibroblasts. AT and RT had different effects on circulating levels of factors, such as cytokines, hormones in serum, and metabolites, and RT increased dermal biglycan (BGN). To our knowledge, this is the first report to show different effects of AT and RT on skin aging and identify the key factors involved in RT-induced skin rejuvenation.
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Affiliation(s)
- Shu Nishikori
- Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Japan
- Frontier Research Center, POLA Chemical Industries, Inc., 560 Kashio-cho, Totsuka-ku, Yokohama, Japan
| | - Jun Yasuda
- Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Japan
| | - Kao Murata
- Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Japan
| | - Junya Takegaki
- Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Japan
| | - Yasuko Harada
- Frontier Research Center, POLA Chemical Industries, Inc., 560 Kashio-cho, Totsuka-ku, Yokohama, Japan
| | - Yuki Shirai
- Frontier Research Center, POLA Chemical Industries, Inc., 560 Kashio-cho, Totsuka-ku, Yokohama, Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Japan.
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Shu X, Huo W, Zou L, Li Z, Tang Y, Li L, Wang X. Treatment of Stretch Marks Using a New Formulation Combining Nanofractional Radiofrequency Plus Magnetic Nanofractional Radiofrequency. Dermatol Ther (Heidelb) 2023:10.1007/s13555-023-00926-y. [PMID: 37171578 DOI: 10.1007/s13555-023-00926-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/12/2023] [Indexed: 05/13/2023] Open
Abstract
INTRODUCTION Stretch marks are common atrophic dermal scars with significant physical and psychological effects. Therefore, there is a need for effective cosmetics and procedures for stretch mark treatment. This study aimed to evaluate the efficacy and safety of a novel treatment for stretch marks that is made up of topical formulations containing beta-glucan combined with nanofractional radiofrequency. METHODS This randomized, blinded control trial enrolled 64 Chinese women aged 20-45 years at > 6 months after delivery with obvious white or silver abdominal stretch marks. Participants were randomly allocated to group A (blank group), group B (topical product group), group C (product combined with nanofractional radiofrequency), and group D (vehicle combined with nanofractional radiofrequency). The stretch mark width, skin elasticity, skin color, skin thickness, and collagen density were noninvasively measured. Two trained assessors evaluated the severity, color, outline, and relaxation of the striae. RESULTS Group C showed the best treatment efficacy, with no adverse effects observed during the study period. CONCLUSION Our findings indicate that stretch mark treatment using topical formulations containing beta-glucan, combined with nanofractional radiofrequency plus magnetic nanofractional radiofrequency, is tolerable and effective. TRIAL REGISTRATION ChiCTR2200056725.
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Affiliation(s)
- Xiaohong Shu
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Wei Huo
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Lin Zou
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Zhaoxia Li
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Ying Tang
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Li Li
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China
- Department of Dermatology, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, Chengdu, 610041, Sichuan, People's Republic of China
| | - Xi Wang
- Center of Cosmetic Evaluation, West China Hospital, Sichuan University, Chengdu, People's Republic of China.
- Department of Dermatology, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, Chengdu, 610041, Sichuan, People's Republic of China.
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Majeed M, Nagabhushanam K, Paulose S, Rajalakshmi HR, Mundkur L. A Randomized Double-Blind, Placebo-Controlled Study to Evaluate the Anti-Skin-Aging Effect of LactoSporin – The Extracellular Metabolite from Bacillus coagulans (Weizmannia coagulans) MTCC 5856 in Healthy Female Volunteers. Clin Cosmet Investig Dermatol 2023; 16:769-782. [PMID: 37016604 PMCID: PMC10066892 DOI: 10.2147/ccid.s403418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/21/2023] [Indexed: 03/31/2023]
Abstract
Purpose There has been a growing interest in the use of probiotics and their products for skin care, over the last decade. LactoSporin is the extracellular metabolite of a spore-forming probiotic Bacillus coagulans (Weizmannia coagulans) MTCC 5856, with antimicrobial and skin protecting activity. Patients and Methods The anti-skin-aging potential of LactoSporin was evaluated in a randomized, double-blinded, placebo-controlled study in healthy female participants (70 screened and 56 randomized). The participants applied either LactoSporin or matched placebo formulation (N=28 in each group) for 10 weeks, and the effects were assessed by dermatological, and non-invasive instrument-based evaluation using Antera, Cutometer, Corneometer, and Tewameter. All the 56 participants completed the study and were included for the analysis. Results The regular use of LactoSporin cream for 10 weeks showed a significant reduction in visibility of wrinkles around crow's feet, nasolabial folds, frown lines, and facial fine lines compared to baseline and placebo by dermatological and Antera assessments. LactoSporin showed improvement in skin elasticity and hydration by dermatological assessments, but the effect was not significantly different from placebo when assessed by Cutometer, Corneometer, and Tewameter. No adverse events or skin irritation was observed in any participants during the study. Conclusion These results suggest that LactoSporin could be a safe natural ingredient to reduce wrinkles and fine lines in cosmetic formulations.
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Affiliation(s)
- Muhammed Majeed
- Sami-Sabinsa Group Limited, Bengaluru (Bangalore), Karnataka, 560 058, India
- Sabinsa Corporation, East Windsor, NJ, 08520, USA
| | | | - Shaji Paulose
- Sami-Sabinsa Group Limited, Bengaluru (Bangalore), Karnataka, 560 058, India
| | - H R Rajalakshmi
- Sami-Sabinsa Group Limited, Bengaluru (Bangalore), Karnataka, 560 058, India
| | - Lakshmi Mundkur
- Sami-Sabinsa Group Limited, Bengaluru (Bangalore), Karnataka, 560 058, India
- Correspondence: Lakshmi Mundkur, Sami-Sabinsa Group Limited, 19/1&19/2, I Main, II Phase, Peenya Industrial Area, Bengaluru, Karnataka, 560 058, India, Fax +91 8068527706, Email
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Falholt Elvebakken H, Bruntse AB, Vedel C, Kjaerulff S. Topical Lactiplantibacillus plantarum LB244R® ointment alleviates skin aging: An exploratory trial. J Cosmet Dermatol 2023; 22:1911-1918. [PMID: 36718014 DOI: 10.1111/jocd.15657] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/28/2022] [Accepted: 01/11/2023] [Indexed: 02/01/2023]
Abstract
BACKGROUND The skin is of vital importance for health and well-being. As people age, the skin undergoes visual and morphological changes such as wrinkling, loss of elasticity, increased pigmentation, and decreased cell turnover. This is not only visually unappealing to many but can also pose health issues. AIM In this study, a probiotic ointment (PO) containing live lactic acid bacteria (LAB) (Lactiplantibacillus plantarum LB244R®) was investigated for its ability to alleviate symptoms of skin aging in an exploratory clinical trial. METHODS The PO was applied twice daily for 56 days by 21 subjects. Anti-aging efficacy was evaluated by skin ultrasonography, skin biomechanical properties, skin hydration, and clinical evaluations at day 0, 28, and 56. RESULTS Sub-epidermal low echogenic band thickness decreased (0.261 ± 0.069 mm to 0.247 ± 0.055 mm) after 56 days. Dermal density increased (324.689 ± 57.506 pixel/mm2 to 367.831 ± 75.790 pixel/mm2 ). Skin hydration increased (34.1 ± 6.9 to 51.3 ± 10.0 AU). Additionally, skin firmness increased, as shown by decreasing values (0.264 ± 0.038 to 0.228 ± 0.037 mm). Skin elasticity increased (0.578 ± 0.045 to 0.618 ± 0.044). Trans-epidermal water loss decreased (9.1 ± 2.0 g/h/m2 to 8.5 ± 1.3). All clinical evaluations, Crow's feet, spot score, smoothness score, and complexion radiance, were improved. CONCLUSION The PO improved all measured parameters with statistical significance after 56 days of application, clearly demonstrating the potential of the PO as an anti-aging agent and reaffirming the potential of topical probiotic LAB. Future studies need to elucidate the mode of action of anti-aging effects by probiotics, but at present time, this study paves the way for the use of probiotic LAB topically to alleviate aging of the skin.
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Di Lorenzo R, Grumetto L, Sacchi A, Laneri S, Dini I. Dermocosmetic evaluation of a nutricosmetic formulation based on Curcuma. Phytother Res 2022; 37:1900-1910. [PMID: 36510399 DOI: 10.1002/ptr.7705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/18/2022] [Accepted: 11/24/2022] [Indexed: 12/15/2022]
Abstract
Endogenous and exogenous factors can alter the skin layer and appearance, determining skin aging. The extracts and isolated molecules from food matrixes can be used to formulate "healthy" antiaging cosmetics. Two different cosmetic approaches can be used to achieve the antiaging effect. It is possible to use topical products based on food extract (cosmeceutical approach) or take a food supplement and apply a topical cosmetic product based on food extract on the surface to be treated (nutricosmetic approach). This work evaluated in vivo the antiaging potential of a nutricosmetic formulation (cream + food supplement) and a cosmeceutical cream based on Curcuma. The choice of the commercial Curcuma extract to be used for experimental purposes was based on the curcuminoid content determined by an HPLC test. Curcuminoids are the bioactive compounds responsible for Curcuma's antioxidant and antiinflammatory properties. Their levels in Curcuma extracts vary according to the storage condition, variety, and pedoclimatic cultivation conditions. The Tewameter® TM300 was used to evaluate the Trans Epidermal Water Loss (TEWL), the Corneometer® CM 825 to determine the moisturizing effect, the Cutometer® to estimate the skin firmness and elasticity, the Dermascan to assess the collagen index, and the Visioface® 1000D to evaluate the wrinkles. The nutricosmetic product showed potential as moisturizing, anti-age, and anti-wrinkle action better than the cosmeceutical product alone.
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Affiliation(s)
| | - Lucia Grumetto
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Antonia Sacchi
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Sonia Laneri
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Irene Dini
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
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13
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Gutierrez-Ontalvilla P, Giner F, Vidal L, Iborra M. The Effect of Lipofilling and Platelet-Rich Plasma on Patients with Moderate-Severe Vulvar Lichen Sclerosus who were Non-Responders to Topical Clobetasol Propionate: A Randomized Pilot Study. Aesthetic Plast Surg 2022; 46:2469-2479. [PMID: 35048150 DOI: 10.1007/s00266-021-02718-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/06/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND The first-line treatment for vulvar lichen sclerosus (VLS) is 3 months of topical corticosteroid therapy. However, limited evidence is available concerning the use of fat grafting and platelet-rich plasma as a second-line treatment for patients who do not respond to first-line treatment. METHODS This prospective single-center randomized pilot trial included 20 patients with a clinical and histological diagnosis of moderate to severe VLS. The patients in the treatment group (TG) received two infiltrations (at 3-month intervals) of nanofat mixed with platelet-rich plasma (PRP) into the vulvar area, while the control group (CG) received standard topical corticosteroid therapy. Fat was aspirated from the medial thigh or lower abdomen regions. Microfat was obtained after centrifugation and was emulsified to obtain a nanofat suspension. Treatment efficacy was determined by measuring changes in the vulvar skin elasticity, histopathology, and clinical signs, symptoms, and patient quality of life at after 1 year. RESULTS A total of 19 patients were finally assessed (9 TG and 10 CG). At the end of the study (1 year), there had been no significant improvement in vulvar skin elasticity. However, patients in the TG showed a significant improvement in their symptoms (itching, pain, burning, and dyspareunia) and clinical signs (cervical erosions, fissures, stenosis, and leukoderma). Analysis of skin biopsies revealed a significant decrease in all inflammatory cell types in the TG. No adverse events related to the autologous treatment were recorded. CONCLUSIONS Compared with topical corticosteroids, two infiltrations delivered 3 months apart decreased the inflammation of the vulva and improved most of the clinical signs and symptoms associated with VLS. Nonetheless, no improvement in vulvar skin elasticity was derived from the autologous treatment. LEVEL OF EVIDENCE I This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- P Gutierrez-Ontalvilla
- Department of Plastic and Reconstructive Surgery, Hospital University La Fe, Avda Fernando Abril Martorell 106, 46026, Valencia, Spain.
| | - F Giner
- Department of Histology, Hospital University La Fe, Valencia, Spain
| | - L Vidal
- Fidia Farmacéutica S.L.U, Barcelona, Spain
| | - M Iborra
- Department of Digestive Medicine, Unit of inflammatory bowel disease, Hospital University La Fe, Valencia, Spain
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14
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Tang SC, Hsiao YP, Ko JL. Genistein protects against ultraviolet B-induced wrinkling and photoinflammation in in vitro and in vivo models. GENES & NUTRITION 2022; 17:4. [PMID: 35209841 PMCID: PMC8903702 DOI: 10.1186/s12263-022-00706-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 02/08/2022] [Indexed: 12/15/2022]
Abstract
Background Chronic exposure to ultraviolet (UV) rays causes severe skin damage by inducing oxidative stress and inflammation. Identifying a safe and natural substance for skin protection is a crucial research goal. Objective The aim of this study was to clarify the effects of genistein on skin inflammation and photoaging by using 3 models (humans: skin parameters; animals: wrinkle formation; and cells: anti-inflammatory effects). Methods Food frequency questionnaire data and serum and skin parameter data from 120 volunteers (a group with a genistein-rich diet [RG group] and a control group). Human keratinocytes were pretreated with genistein before ultraviolet B (UVB) irradiation. Genistein was topically applied to the dorsal skin of rats. Results The blood samples of the RG group had lower serum uric acid levels and blood urea nitrogen levels. The dynamic elasticity level in the RG group was higher than that in the controls. Genistein pretreatment suppressed the expression of proinflammatory cytokines (CXCL1, IL-1, MIF, and PLANH1) and the proteins released by UVB-treated keratinocytes. Topical application of genistein to the dorsal skin of rats reduced the severity of UVB-induced wrinkling. Both intake and topical application of genistein combated UVB-induced inflammation and aging. Conclusions Genistein could be used as a safe and natural compound for use in novel anti-inflammatory agents for topical application. Graphical abstract The experimental design procedure, including the skin parameter and blood serum measurements of 137 participants. Genistein-rich compounds provide protection against UVB-induced inflammation, as determined using in vitro and in vivo animal model experiments.
![]() Supplementary Information The online version contains supplementary material available at 10.1186/s12263-022-00706-x.
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Affiliation(s)
- Sheau-Chung Tang
- Department of Nursing, National Taichung University of Science and Technology, Taichung, 403, Taiwan
| | - Yu-Ping Hsiao
- Institute of Medicine, Chung Shan Medical University, No.110, Sec. 1, Chien-Kuo N. Road, Taichung, 402, Taiwan. .,Department of Dermatology, Chung Shan Medical University Hospital, No.110, Sec. 1, Chien-Kuo N. Road, Taichung, 402, Taiwan.
| | - Jiunn-Liang Ko
- Institute of Medicine, Chung Shan Medical University, No.110, Sec. 1, Chien-Kuo N. Road, Taichung, 402, Taiwan. .,Department of Medical Oncology and Chest Medicine, Chung Shan Medical University Hospital, Taichung, 402, Taiwan.
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15
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Montero P, Pérez-Leal M, Pérez-Fidalgo JA, Sanz C, Estornut C, Roger I, Milara J, Cervantes A, Cortijo J. Paclitaxel Induces Epidermal Molecular Changes and Produces Subclinical Alterations in the Skin of Gynecological Cancer Patients. Cancers (Basel) 2022; 14:cancers14051146. [PMID: 35267454 PMCID: PMC8909563 DOI: 10.3390/cancers14051146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/18/2022] [Accepted: 02/22/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary Skin toxicity is one of paclitaxel’s adverse effects. However, its real impact on the skin could be underestimated as these alterations can also appear asymptomatic. We have observed that paclitaxel modifies gene and protein expression of skin markers in a 3D epidermis model, and impairs physical, physiological, and biomechanical properties of the skin in gynecologic cancer patients. These subclinical alterations might be avoided by using prophylactic measures during treatment to prevent possible future adverse reactions. Abstract Background: Paclitaxel is a microtubule-stabilizing chemotherapeutic agent. Despite its widespread use, it damages healthy tissues such as skin. The goal of this study was to prove that the real impact of paclitaxel-induced skin toxicity could be underestimated because the adverse events might appear asymptomatic. Methods: Gynecological cancer patients were recruited. Skin parameters measurements were taken after three and six paclitaxel cycles. Measurements were conducted using specific probes which measure hydration, transepidermal water loss (TEWL), sebum, elasticity and firmness, erythema, roughness, smoothness, skin thickness, and desquamation levels. Further, a 3D epidermis model was incubated with paclitaxel to analyze gene and protein expression of aquaporin 3, collagen type 1, elastin, and fibronectin. Results: Paclitaxel induced alterations in the skin parameters with no visible clinical manifestations. Gynecological cancer patients under paclitaxel treatment had a decrease in hydration, TEWL, sebum, elasticity, and thickness of the skin, while erythema, roughness, and desquamation were increased. The molecular markers, related to hydration and the support of the skin layers, and analyzed in the 3D epidermis model, were decreased. Conclusions: Results suggest that paclitaxel modifies gene and protein expression of skin-related molecular markers, and impairs different physical, physiological, and biomechanical properties of the skin of cancer patients at a subclinical level.
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Affiliation(s)
- Paula Montero
- Department of Pharmacology, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; (C.S.); (C.E.); (I.R.); (J.M.); (J.C.)
- Correspondence: ; Tel.: +34-963864631
| | - Martín Pérez-Leal
- Faculty of Health Sciences, Universidad Europea de Valencia, 46010 Valencia, Spain;
| | - Jose Alejandro Pérez-Fidalgo
- Department of Medical Oncology, Hospital Clínico Universitario de Valencia, 46010 Valencia, Spain;
- Biomedical Research Networking Centre on Cancer (CIBERONC), Health Institute Carlos III, 28029 Madrid, Spain
- INCLIVA Biomedical Research Institute, 46010 Valencia, Spain;
| | - Celia Sanz
- Department of Pharmacology, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; (C.S.); (C.E.); (I.R.); (J.M.); (J.C.)
- Health Sciences, Pre-Departmental Section of Medicine, Jaume I University of Castellón de la Plana, 12071 Castellón, Spain
| | - Cristina Estornut
- Department of Pharmacology, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; (C.S.); (C.E.); (I.R.); (J.M.); (J.C.)
| | - Inés Roger
- Department of Pharmacology, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; (C.S.); (C.E.); (I.R.); (J.M.); (J.C.)
- Biomedical Research Networking Centre on Respiratory Diseases (CIBERES), Health Institute Carlos III, 28029 Madrid, Spain
| | - Javier Milara
- Department of Pharmacology, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; (C.S.); (C.E.); (I.R.); (J.M.); (J.C.)
- Biomedical Research Networking Centre on Respiratory Diseases (CIBERES), Health Institute Carlos III, 28029 Madrid, Spain
- Pharmacy Unit, University General Hospital Consortium, 46014 Valencia, Spain
| | | | - Julio Cortijo
- Department of Pharmacology, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; (C.S.); (C.E.); (I.R.); (J.M.); (J.C.)
- Biomedical Research Networking Centre on Respiratory Diseases (CIBERES), Health Institute Carlos III, 28029 Madrid, Spain
- Research and Teaching Unit, University General Hospital Consortium, 46014 Valencia, Spain
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16
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Kim SH, Kim JH, Lee SJ, Jung MS, Jeong DH, Lee KH. Minimally invasive skin sampling and transcriptome analysis using microneedles for skin type biomarker research. Skin Res Technol 2022; 28:322-335. [PMID: 35007372 PMCID: PMC9907599 DOI: 10.1111/srt.13135] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 12/18/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Minimally invasive skin sampling is used in various fields. In this study, we examined whether it was possible to obtain skin specimens using biocompatible microneedles composed of sodium hyaluronate and performed transcriptome analysis. MATERIALS AND METHODS Thirty-three subjects with different skin conditions, such as skin aging, skin hydration, skin pigmentation, oily skin and sensitive skin, were recruited. Skin types were evaluated based on age, non-invasive measurement devices, 10% lactic acid stinging test and visual assessment; the skin specimens were sampled from the face using microneedles. Total RNA was extracted, and microarray was performed. Correlations between various biomarkers and skin condition parameters were analysed. RESULTS Several skin-type biomarkers are correlated with age, non-invasive device measurements, LAST score and visual assessment of acne lesions. Representatively, COL1A1 (Collagen type 1 alpha 1 chain), FN1 (Fibronectin 1) and PINK1 (PTEN-induced putative kinase protein 1) for skin aging, FLG (Filaggrin), KLF4 (Kruppel-like factor 4) and LOR (Loricrin) for skin hydration, GPNMB (Glycoprotein non-metastatic melanoma protein B), MLANA (Melan-A) and TYR (Tyrosinase) for skin pigmentation, IGF1 (insulin-like growth factor-1), MPZL3 (Myelin protein zero like 3) and AQP3 (Aquaporin 3) for oily skin and PGF (placental growth factor), CYR61 (cysteine-rich angiogenic inducer 61), RBP4 (retinol-binding protein 4), TAC1 (Tachykinin precursor 1), CAMP (Cathelicidin antimicrobial peptide), MMP9 (Matrix metallopeptidase 9), MMP3, MMP12 and CCR1 (C-C motif chemokine receptor 1) for sensitive skin. CONCLUSION Microneedle skin sampling is a new and minimally invasive option for transcriptome analysis of human skin and can be applied for diagnosis and treatment efficacy evaluation, as well as skin type classification.
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Affiliation(s)
- Seo Hyeong Kim
- Cutis Biomedical Research Center Co. Ltd., Seoul, Republic of Korea
| | - Ji Hye Kim
- Cutis Biomedical Research Center Co. Ltd., Seoul, Republic of Korea
| | - Sung Jae Lee
- Cutis Biomedical Research Center Co. Ltd., Seoul, Republic of Korea
| | - Min Sook Jung
- Cutis Biomedical Research Center Co. Ltd., Seoul, Republic of Korea
| | | | - Kwang Hoon Lee
- Cutis Biomedical Research Center Co. Ltd., Seoul, Republic of Korea.,Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
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17
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Rosicka K, Mierzejewska-Krzyżowska B, Mrówczyński W. Skin biomechanical and viscoelastic properties measured with MyotonPRO in different areas of human body. Skin Res Technol 2021; 28:236-245. [PMID: 34751466 PMCID: PMC9907614 DOI: 10.1111/srt.13116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 10/16/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND There is still a lack of clinically practical device, which allows to perform rapid and accurate examination of the skin condition. For this reason, suitability of the MyotonPRO for the assessment of skin biomechanical and viscoelastic parameters was evaluated in this study. The aim of the study was to establish the reference values of five parameters measured by MyotonPRO various locations of human skin. MATERIALS AND METHODS Oscillation frequency, dynamic stiffness, logarithmic decrement, mechanical stress relaxation and creep were measured at three different skin locations (clavicula, volar forearm and shin), using L-shape short and medium arm probes in 32 young female volunteers. Mean values of obtained parameters recorded by both probes were compared among three skin locations while reliabilities of measurements were assessed. Additionally, relationships between all recorded parameters were examined RESULTS: There were no statistically significant differences between the mean values of five measured parameters obtained with both probes in all investigated areas. However, statistically significant differences of mean values of almost all parameters measured among three places examined were found. Despite considerable differences in mean values of obtained parameters, there were visible strong correlations between some studied parameters in all three investigated areas of skin. CONCLUSION It was demonstrated in all locations studied that the higher value of oscillation frequency corresponds to the higher value of dynamic stiffness, moreover such tissue recovers faster to its initial shape, and it was characterized by lower creep values. Such results indicate the existence of identical relationships between the same studied parameters in different areas of skin.
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Affiliation(s)
- Katarzyna Rosicka
- Department of Biological Sciences, Faculty of Physical Culture, Poznań University of Physical Education, Gorzów Wielkopolski, Poland
| | - Barbara Mierzejewska-Krzyżowska
- Department of Biological Sciences, Faculty of Physical Culture, Poznań University of Physical Education, Gorzów Wielkopolski, Poland
| | - Włodzimierz Mrówczyński
- Department of Neurobiology, Faculty of Health Sciences, Poznań University of Physical Education, Poznań, Poland
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18
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Esposito T, Mencherini T, Sansone F, Auriemma G, Gazzerro P, Puca RV, Iandoli R, Aquino RP. Development, Characterization, and Clinical Investigation of a New Topical Emulsion System Containing a Castanea sativa Spiny Burs Active Extract. Pharmaceutics 2021; 13:1634. [PMID: 34683927 PMCID: PMC8539921 DOI: 10.3390/pharmaceutics13101634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/01/2021] [Accepted: 10/04/2021] [Indexed: 12/11/2022] Open
Abstract
The study focused on the development and characterization of an O/W emulsion for skincare containing Castanea sativa spiny burs extract (CSE) as functional agent. The emulsion was stable and had suitable physicochemical and technological properties for dermal application and CSE showed no cytotoxicity in spontaneously immortalized keratinocytes (HaCaT) at active concentrations. A single-blind, placebo-controlled, monocentric study was designed to evaluate the skin tolerability and the skin performance of the CSE-loaded emulsion on healthy human volunteers. An improvement was observed in skin biomechanical properties such as hydration, skin elasticity and a reduction in the periorbital wrinkles in 30 days without altering the skin barrier function, sebum, pH, and erythema values. A significant skin moisturizing effect was detected while the skin barrier function was preserved. The selected natural ingredient combined with the designed formulation and the optimized preparation method has led to a final product that satisfies the physico-chemical and technological requirements underlying the safety of use and the formulative stability over time. With no negative skin reactions and highly significant effects on skin elasticity, wrinkles, and moisturization, the CSE-based emulsion achieved very satisfying outcomes representing a promising functional formulation for skin care.
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Affiliation(s)
- Tiziana Esposito
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (T.E.); (G.A.); (P.G.); (R.P.A.)
- Unesco Chair Salerno, Plantae Medicinales Mediterraneae, University of Salerno, 84084 Fisciano, Italy
- COSM-HI Lab,“San Giuseppe Moscati” National Hospital (AORN), Contrada Amoretta, 83100 Avellino, Italy
| | - Teresa Mencherini
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (T.E.); (G.A.); (P.G.); (R.P.A.)
- Unesco Chair Salerno, Plantae Medicinales Mediterraneae, University of Salerno, 84084 Fisciano, Italy
- COSM-HI Lab,“San Giuseppe Moscati” National Hospital (AORN), Contrada Amoretta, 83100 Avellino, Italy
| | - Francesca Sansone
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (T.E.); (G.A.); (P.G.); (R.P.A.)
- Unesco Chair Salerno, Plantae Medicinales Mediterraneae, University of Salerno, 84084 Fisciano, Italy
- COSM-HI Lab,“San Giuseppe Moscati” National Hospital (AORN), Contrada Amoretta, 83100 Avellino, Italy
| | - Giulia Auriemma
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (T.E.); (G.A.); (P.G.); (R.P.A.)
| | - Patrizia Gazzerro
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (T.E.); (G.A.); (P.G.); (R.P.A.)
| | - Rosa Valentina Puca
- Dermatology and Dermosurgery, “San Giuseppe Moscati” National Hospital (AORN), Contrada Amoretta, 83100 Avellino, Italy; (R.V.P.); (R.I.)
| | - Raffaele Iandoli
- Dermatology and Dermosurgery, “San Giuseppe Moscati” National Hospital (AORN), Contrada Amoretta, 83100 Avellino, Italy; (R.V.P.); (R.I.)
| | - Rita Patrizia Aquino
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (T.E.); (G.A.); (P.G.); (R.P.A.)
- Unesco Chair Salerno, Plantae Medicinales Mediterraneae, University of Salerno, 84084 Fisciano, Italy
- COSM-HI Lab,“San Giuseppe Moscati” National Hospital (AORN), Contrada Amoretta, 83100 Avellino, Italy
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19
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Müller B, Mazza E, Schiestl C, Elrod J. Longitudinal monitoring and prediction of long-term outcome of scar stiffness on pediatric patients. BURNS & TRAUMA 2021; 9:tkab028. [PMID: 34604394 PMCID: PMC8484205 DOI: 10.1093/burnst/tkab028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/25/2021] [Indexed: 11/13/2022]
Abstract
Background Hypertrophic scarring after burn injury is one of the greatest unmet challenges in patients with burn injuries. A better understanding of the characteristics of scar maturation and early prediction of the long-term outcome of scarring are prerequisites for improving targeted therapies and pivotal for patient counselling. Methods Repeated measurements of scar stiffness in 11 pediatric patients were performed over the course of 1 year using 2 suction devices, the Cutometer and the Nimble. In addition, the observer pliability score of the Patient and Observer Scar Assessment Scale was applied. This longitudinal study allowed quantification of the ability of each of the measured parameters to reflect scar maturation, as indicated by change in skin pliability/stiffness, over time (using linear regression); the ability to distinguish individual patients (intraclass correlation coefficient (ICC)); the correlation of the devices (Spearman correlation coefficient); and the ability to predict long-term scar maturation based on early scar assessment (using receiver operating characteristic). Results All the tools used showed significant longitudinal decrease of scar stiffness from 3 months until 12 months after the injury. The Nimble (ICCpatient Nimble = 0.99) and the Cutometer (ICCpatient Cuto = 0.97) demonstrated an excellent ability to distinguish between individual patients. The Nimble seemed to be able to predict the 12-month pliability of scars based on early (3-month) measurements (area under the curve (AUC)12m POSAS = 0.67; AUC12m C = 0.46; AUC12m N = 0.79). Conclusions The results of this preliminary study suggest that all 3 tools provide suitable means to quantify alterations in scar stiffness over time. Initial evidence suggests the Nimble is most favorable for predicting changes in stiffness associated with long-term scar maturation. Further studies with a larger sample size are required to validate tissue suction as a clinical tool for analysis of changes of scar stiffness over time.
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Affiliation(s)
- Bettina Müller
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland
| | - Edoardo Mazza
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland
| | - Clemens Schiestl
- Burn Center, Division of Plastic and Reconstructive Surgery, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032 Zürich, Switzerland
| | - Julia Elrod
- Burn Center, Division of Plastic and Reconstructive Surgery, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032 Zürich, Switzerland
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20
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Rosicka K, Hill M, Wdowski MM. Skin anisotropy: Finding the optimal incision line for volar forearm in males and females. J Mech Behav Biomed Mater 2021; 124:104805. [PMID: 34474321 DOI: 10.1016/j.jmbbm.2021.104805] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Proper understanding of skin biomechanics, viscoelasticity and investigation of skin tension vectors is necessary to find optimal incision lines. Great tension across a healing wound after any surgical procedure might lead to forming hypertrophic scars. The aim of the study was to investigate tension lines in volar forearm skin in young males and females, in order to ensure best incision line. METHODS Five biomechanical and viscoelastic parameters were measured using a hand-held myotonometer: Oscillation Frequency [Hz], Dynamic Stiffness [N/m], Logarithmic Decrement of tissue's natural oscillation, Mechanical Stress Relaxation Time [ms], and Creep. Measurements were taken in four different directions; Along Forearm, Across Forearm, Along Langer's Line and Across Langer's Line. RESULTS Significant main effects for direction were found for Oscillation Frequency (p < 0.001, η2 = 0.371) [Hz], Dynamic Stiffness (p < 0.001, η2 = 0.522) [N/m], Logarithmic Decrement (p < 0.001, η2 = 0.083), Mechanical Stress Relaxation Time (p < 0.001, η2 = 0.494) [ms] and Creep (p < 0.001, η2 = 0.480). For each parameter except for logarithmic decrement results obtained Along Langers Line and Across Forearm were significantly different to Across Langers Line and Along Forearm (p < 0.001, d = -2.76 - 2.66). Significant main effects for sex were found for logarithmic decrement Along Forearm (p < 0.001, d = 1.698) and Across Langer's Line (p = 0.021, d = 1.697). CONCLUSIONS Our results suggested that optimal incision line for this age group in males and females could potentially be performed diagonally i.e. Across Langer's Line or parallel i.e. Along Forearm to forearm axis. These directions would provide the lowest tension across a healing wound and possibly minimalize the risk of hypertrophic scarring post incision.
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Affiliation(s)
- K Rosicka
- Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp., Poznań University of Physical Education, Gorzów Wlkp, Poland.
| | - M Hill
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, United Kingdom
| | - M M Wdowski
- Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, United Kingdom
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21
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Rigal A, Michael-Jubeli R, Nkengne A, Baillet-Guffroy A, Bigouret A, Tfayli A. Raman confocal microscopy and biophysics multiparametric characterization of the skin barrier evolution with age. JOURNAL OF BIOPHOTONICS 2021; 14:e202100107. [PMID: 34105894 DOI: 10.1002/jbio.202100107] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 06/12/2023]
Abstract
Skin aging is a multifactorial phenomenon that involves alterations at the molecular, cellular and tissue levels. Our aim was to carry out a multiparametric biophysical and Raman characterization of skin barrier between individuals of different age groups (<24 and >70 years old). Our results showed a significant decrease of lipids to proteins ratio overall the thickness of the stratum corneum and higher lateral packing in the outer part of the SC for elderly. This can explain the decrease in trans epidermal water loss measured values rather than only SC thickening. Both age groups showed similar water content at SC surface while elderly presented higher water content in deep SC and viable epidermis. Mechanical measurements showed a decrease in the elasticity and an increase in the fatigability with age and were correlated with partially bound water. Highest correlation and anti-correlation values were observed for the deepest part of the SC and the viable epidermis.
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Affiliation(s)
- Aline Rigal
- Lipides: Systèmes Analytiques et Biologiques Lip(Sys)2 Interdisciplinary Unit, Faculty of Pharmacy, University Paris-Saclay, Châtenay-Malabry, France
| | - Rime Michael-Jubeli
- Lipides: Systèmes Analytiques et Biologiques Lip(Sys)2 Interdisciplinary Unit, Faculty of Pharmacy, University Paris-Saclay, Châtenay-Malabry, France
| | - Alex Nkengne
- Clarins Laboratories, LEC : Laboratoire d'Evaluation Clinique, Pontoise, France
| | - Arlette Baillet-Guffroy
- Lipides: Systèmes Analytiques et Biologiques Lip(Sys)2 Interdisciplinary Unit, Faculty of Pharmacy, University Paris-Saclay, Châtenay-Malabry, France
| | - Armelle Bigouret
- Clarins Laboratories, LEC : Laboratoire d'Evaluation Clinique, Pontoise, France
| | - Ali Tfayli
- Lipides: Systèmes Analytiques et Biologiques Lip(Sys)2 Interdisciplinary Unit, Faculty of Pharmacy, University Paris-Saclay, Châtenay-Malabry, France
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22
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Goldie K, Kerscher M, Fabi SG, Hirano C, Landau M, Lim TS, Woolery-Lloyd H, Mariwalla K, Park JY, Yutskovskaya Y. Skin Quality - A Holistic 360° View: Consensus Results. Clin Cosmet Investig Dermatol 2021; 14:643-654. [PMID: 34163203 PMCID: PMC8214518 DOI: 10.2147/ccid.s309374] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/01/2021] [Indexed: 12/12/2022]
Abstract
Introduction Skin quality is an important component of human attractiveness. To date, there are no standardized criteria for good skin quality. To establish a consensus for good skin quality parameters and measurement and treatment options, a virtual skin quality advisory board consisting of a global panel of highly experienced aesthetic dermatologists/aesthetic physicians was convened. Methods A total of 10 dermatologists/aesthetic physicians served on the advisory board. A modified version of the Delphi method was used to arrive at consensus. Members accessed an online platform to review statements on skin quality criteria from their peers, including treatment and measurement options, and voted to indicate whether they agreed or disagreed. Statements that did not have agreement were modified and the members voted again. Consensus was defined as: strong consensus = greater than 95% agreement; consensus = 75% to 95% agreement; majority consent = 50% to 75% agreement; no consensus = less than 50% agreement. Results There was strong consensus that good skin quality is defined as healthy, youthful in appearance (appearing younger than a person's chronological age), undamaged skin and that skin quality can be described across all ethnicities by four emergent perceptual categories (EPCs): skin tone evenness, skin surface evenness, skin firmness, and skin glow. The EPCs can be affected by multiple tissue layers (ie, skin surface quality can stem from and be impacted by deep structures or tissues). This means that topical approaches may not be sufficient. Instead, improving skin quality EPCs can require a multilayer treatment strategy. Conclusion This global advisory board established strong consensus that skin quality can be described by four EPCs, which can help clinicians determine the appropriate treatment option(s) and the tissue or skin layer(s) to address. Skin quality is important to human health and wellbeing and patients' perception for the need for aesthetic treatment.
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Affiliation(s)
| | - Martina Kerscher
- Division of Cosmetic Science, Department of Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | | | - Cyro Hirano
- Division of Dermatology General Polyclinic of Rio de Janeiro, Private Practice, CD Clinica Dermatologica, Rio de Janeiro, Brazil
| | - Marina Landau
- Dermatology Unit, Wolfson Medical Center, Holon, Israel
| | | | - Heather Woolery-Lloyd
- Department of Ethnic Skin Care, University of Miami Cosmetic Medicine and Research Institute, Miami Beach, FL, USA
| | | | - Je-Young Park
- Apkoo-Jung Department, Oracle Dermatology Center, Seoul, Republic of Korea
| | - Yana Yutskovskaya
- Dermatovenerology and Cosmetology Department, Pacific State Medical University of Health, Moscow, Russia
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23
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Ohshima H, Kurosumi M, Kanto H. New solution of beauty problem by Staphylococcus hominis: Relevance between skin microbiome and skin condition in healthy subject. Skin Res Technol 2021; 27:692-700. [PMID: 33511688 DOI: 10.1111/srt.13001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/27/2020] [Accepted: 12/24/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND/AIMS Recently, it was suggested that skin microbiome is related to some skin disease. The possibility of affecting the skin might be high, but there were few reports of the influence on the skin condition in healthy subjects. Our aim was to evaluate the relationship between skin condition and skin microbiome in healthy subjects. METHODS Experiment 1: 293 Japanese healthy women were divided into two groups, good skin properties and poor skin properties by 14 skin physiology parameter values on the cheek using noninvasive method. Differences of abundance of bacterial species on the cheek between the two groups were evaluated. Experiment 2: 11 Japanese healthy women were applied Staphylococcus hominis (S. hominis) on half-side of cheek for eight times in 1 month. Difference of change of physiology parameter values comparing to placebo side was evaluated. RESULTS Experiment 1: Multiple skin bacterial species were found to be significantly relevant in 14 physiology parameters. The abundance of S. hominis on the cheek with good skin properties group was significantly higher than poor skin properties group. Experiment 2: The application of S. hominis improved significantly the conspicuous pore number, melanin index, and the wrinkle count compared to placebo side. CONCLUSION We found many skin bacterial species that might improve the skin condition in healthy women. In particular, S. hominis might have the potential to improve multiple skin beauty problems.
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Affiliation(s)
- Hiroshi Ohshima
- POLA Laboratories, POLA CHEMICAL INDUSTRIES, INC., Yokohama, Japan
| | | | - Hiromi Kanto
- Department of Dermatology, School of Medicine, Toho University, Tokyo, Japan
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24
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Changes in Skin Elasticity and Firmness Caused by Cosmetic Formulas Elaborated with Essential Oils of Aristeguietia glutinosa (matico) and Ocotea quixos (ishpingo). A Statistical Analysis. COSMETICS 2020. [DOI: 10.3390/cosmetics7040095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
External factors such as prolonged exposure to solar radiation and environmental pollution accelerate the aging process of the skin, and this process is a challenge for pharmacological science. To counteract the effects of skin photoaging, the cosmetic industry has introduced natural topical products that have proved to be effective in reducing signs of age. In this sense, a statistical analysis was conducted on the changes in the properties of firmness and elasticity of the skin caused by cosmetic formulas (lotion and cream) elaborated with essential oils of Aristeguietia glutinosa (matico) and Ocotea quixos (ishpingo) in which the concentration of the oils in two cosmetic products (lotion and cream) varied to be tested in vivo, through the measurement of elasticity and firmness in three times T1 (0 day), T2 (28 days) and T3 (56 days), and in two age groups according to the Glogau scale (30 to 40 and 41 to 50 years). The results showed positive changes in the values of elasticity and firmness of the skin in the presentation of the lotion whose concentration was 20% Aristeguietia glutinosa (matico) and 80% Ocotea quixos (ishpingo), with a minimum application time of 28 days.
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25
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Autologous Fat Transfer for Scar Prevention and Remodeling: A Randomized, Blinded, Placebo-controlled Trial. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2020; 8:e2830. [PMID: 33154872 PMCID: PMC7605847 DOI: 10.1097/gox.0000000000002830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 03/18/2020] [Indexed: 12/24/2022]
Abstract
Autologous fat transfer—also referred to as fat grafting—has been reported to provide beneficial effects to overlying scar and skin. Despite procedural frequency, there is a paucity of high-level evidence guiding the surgeon in technique, patient selection, and efficacy.
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26
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Rosicka K, Mierzejewska-Krzyżowska B, Mrówczyński W. Comparison of different MyotonPRO probes for skin stiffness evaluation in young women. Skin Res Technol 2020; 27:332-339. [PMID: 33078499 DOI: 10.1111/srt.12946] [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: 06/28/2020] [Accepted: 09/05/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Stiffness of skin is widely used parameter in many research areas, for example cosmetic industry, dermatology or rheumatology for assessing of skin condition as well as changes occurring in skin. In this pioneering study, we conducted measurements of skin stiffness using MyotonPRO -novel tool, which was mainly used to evaluate biomechanical properties of muscles, ligaments and tendons. We expected that MyotonPRO , which shows great reproducibility in previous studies, will also be able to measure skin stiffness. MATERIALS AND METHODS Four replaceable probes designed by MyotonPRO (L-shape short and medium arm, standard cylindrical flat-end probe and the same standard probe with disc attachment ) were tested for measurement of skin stiffness in young women (30 healthy females) at three different locations (clavicula, volar forearm and shin). RESULTS There was no significant difference between stiffness values obtained with L-shape short and L-shape medium arm probes in all investigated areas. Stiffness values recorded by regular probe and regular probe with disc attachment differ significantly from those collected with L-shape probes. There was also significant difference between values of stiffness obtained by standard with disc attachment and standard probes. CONCLUSION Both L-shape probes show a great reliability for skin stiffness assessment. Therefore, MyotonPRO can be considered a reliable device for assessing skin stiffness.
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Affiliation(s)
- Katarzyna Rosicka
- Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp., Poznań University of Physical Education, Gorzów Wlkp., Poland
| | - Barbara Mierzejewska-Krzyżowska
- Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp., Poznań University of Physical Education, Gorzów Wlkp., Poland
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27
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Kawałkiewicz W, Matthews-Kozanecka M, Janus-Kubiak M, Kubisz L, Hojan-Jezierska D. Instrumental diagnosis of facial skin-A necessity or a pretreatment recommendation in esthetic medicine. J Cosmet Dermatol 2020; 20:875-883. [PMID: 32702173 PMCID: PMC7983914 DOI: 10.1111/jocd.13638] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/15/2020] [Accepted: 07/20/2020] [Indexed: 11/30/2022]
Abstract
Background This paper presents the possibilities of pretreatment instrumental diagnosis for assessing the condition of various facial skin areas. Aim Tests which aimed at determining the firmness and elasticity of facial skin were conducted. Methods Analysis of skin parameters in selected facial areas in adults over a wide age range was performed using the Cutometer Dual MPA 580 probe. Parameters R0, R2, R5, R7, R8, and R9 were analyzed. Results The following results were obtained: R0 (0.20‐0.33) mm; R2 (0.66‐0.82) a.u.; R5 (0.60‐0.92) a.u.; R7 (0.37‐0.52) a.u.; R8 (0.10‐0.27) mm; and R9 (0.03‐0.05) mm. The R0 parameter showed no statistically significant correlation between skin firmness and age. On the basis of the other parameters, it can be concluded that skin elasticity and an ability to return to its original shape around the eyes, on the cheeks and around the lips, are greater in younger patients than in older groups. There were no statistically significant differences within each age group between the right and left sides of the face. Conclusion Skin firmness described by the R0 parameter is constant in the studied groups and independent of age. Skin elasticity, and an ability to return to its original shape around the eyes, on the cheeks and around the lips, is greater in younger patients. The aging process simultaneously affects the entire facial skin.
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Affiliation(s)
| | - Maja Matthews-Kozanecka
- Department of Social and Humanistic Sciences, Poznan University of Medical Sciences, Poznan, Poland
| | - Marta Janus-Kubiak
- Department of Biophysics, Poznan University of Medical Sciences, Poznan, Poland
| | - Leszek Kubisz
- Department of Biophysics, Poznan University of Medical Sciences, Poznan, Poland
| | - Dorota Hojan-Jezierska
- Department of Hearing Healthcare Profession, Chair of Biophysics, Poznan University of Medical Sciences, Poznan, Poland
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28
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Beker L, Matsuhisa N, You I, Ruth SRA, Niu S, Foudeh A, Tok JBH, Chen X, Bao Z. A bioinspired stretchable membrane-based compliance sensor. Proc Natl Acad Sci U S A 2020; 117:11314-11320. [PMID: 32385155 PMCID: PMC7260970 DOI: 10.1073/pnas.1909532117] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Compliance sensation is a unique feature of the human skin that electronic devices could not mimic via compact and thin form-factor devices. Due to the complex nature of the sensing mechanism, up to now, only high-precision or bulky handheld devices have been used to measure compliance of materials. This also prevents the development of electronic skin that is fully capable of mimicking human skin. Here, we developed a thin sensor that consists of a strain sensor coupled to a pressure sensor and is capable of identifying compliance of touched materials. The sensor can be easily integrated into robotic systems due to its small form factor. Results showed that the sensor is capable of classifying compliance of materials with high sensitivity allowing materials with various compliance to be identified. We integrated the sensor to a robotic finger to demonstrate the capability of the sensor for robotics. Further, the arrayed sensor configuration allows a compliance mapping which can enable humanlike sensations to robotic systems when grasping objects composed of multiple materials of varying compliance. These highly tunable sensors enable robotic systems to handle more advanced and complicated tasks such as classifying touched materials.
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Affiliation(s)
- Levent Beker
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
- Department of Mechanical Engineering, Koç University, Sariyer, Istanbul, 34450, Turkey
| | - Naoji Matsuhisa
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Insang You
- Department of Materials Science and Engineering, Pohang University of Science and Technology, 37673 Pohang, Gyeongbuk, Korea
| | | | - Simiao Niu
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
| | - Amir Foudeh
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
| | - Jeffrey B-H Tok
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305
| | - Xiaodong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305;
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29
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Granger C, Aladren S, Delgado J, Garre A, Trullas C, Gilaberte Y. Prospective Evaluation of the Efficacy of a Food Supplement in Increasing Photoprotection and Improving Selective Markers Related to Skin Photo-Ageing. Dermatol Ther (Heidelb) 2020; 10:163-178. [PMID: 31797305 PMCID: PMC6994571 DOI: 10.1007/s13555-019-00345-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Indexed: 01/08/2023] Open
Abstract
INTRODUCTION Skin exposure to ultraviolet radiation (UVR) can cause oxidative stress, particularly in the absence of adequate protective measures or in individuals with a sensitive skin type. Most commonly, protection from UVR entails the use of topical sunscreens. Sunscreens, however, have various limitations. The objective of this study was to evaluate the efficacy and tolerability of an oral food supplement containing a combination of actives with mainly antioxidative properties (vitamins A, C, D3, E, selenium, lycopene, lutein, as well as green tea, polypodium and grape extracts) in the context of photoprotection. METHODS Photoprotective efficacy was assessed in a 12-week-long, open, prospective and monocentric clinical study with 30 subjects (27 women and 3 men) having a Fitzpatrick skin type I-III and manifesting clinical ageing signs. The study included several visits (14, 28, 56, and 84 days after starting supplement intake), in which photoprotection was evaluated by the measurement of the minimal erythema dose (MED), while the antioxidant capacity of the skin was assessed through ferric reducing antioxidant power (FRAP) and malondialdehyde (MDA) assays. Additionally, several skin parameters (including radiance, elasticity, and moisture) were evaluated. Product evaluation was performed throughout the length of the study by means of a self-assessment questionnaire, and safety was monitored through a self-recording of all observed adverse reactions. RESULTS The MED levels increased significantly compared to baseline throughout the study visits, reaching an increase of + 8.1% at T84, p < 0.001. FRAP results also indicated a significant increase in the antioxidant capacity of the skin compared to baseline (+ 22.7% at T84, p < 0.001), while the MDA assay showed a significant decrease in MDA concentration compared to baseline (- 6.4% at T84, p < 0.001) which, in line with the FRAP results, indicated enhanced antioxidative protection of the skin. All assessed skin parameters, including radiance (+ 36.1% at T84, p < 0.001), gross elasticity (+ 13.2% at T84, p < 0.001), net elasticity (+ 28.0% at T84, p < 0.001), and moisture (+ 13.8% at T84, p < 0.001) were also significantly improved. The product was well tolerated as no adverse events were attributed by the investigators to the use of the product. Additionally, the global score obtained from the self-assessment questionnaires provided overwhelmingly positive feedback from the study subjects. CONCLUSIONS The food supplement evaluated in this study was effective and well-tolerated by the subjects, demonstrating a beneficial effect in terms of photoprotection, enhancing the antioxidative status of the skin and improving general skin condition. TRIAL REGISTRATION Retrospectively registered 3rd October 2019, ISRCTN18121679.
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Affiliation(s)
| | | | | | - Aurora Garre
- Innovation and Development ISDIN, Barcelona, Spain
| | | | - Yolanda Gilaberte
- Dermatology Department, Hospital Universitario Miguel Servet, Saragossa, Spain
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30
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Jung G, Lee MY, Kim S, Lee JB, Kim JG. Analysis of relation between skin elasticity and the entropy of skin image using near-infrared and visible light sources. JOURNAL OF BIOPHOTONICS 2020; 13:e201900213. [PMID: 31483946 DOI: 10.1002/jbio.201900213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 08/05/2019] [Accepted: 09/01/2019] [Indexed: 06/10/2023]
Abstract
Skin elasticity has been regarded as one of the main indicators of skin condition. Current measurement devices for skin elasticity are mostly expensive for home-use and should contact the skin surface. As a first step to develop improved methods, we focus on the relation between skin elasticity and the entropy of skin images. Reduced skin elasticity causes wrinkles. It spreads frequency components and increases their randomness in the frequency domain. The randomness is quantified as entropy, which is a measure of the disorder of a system in physics. Therefore, skin elasticity is expected to have a negative relation with entropy. This tendency can be improved by applying penetration depth characteristics according to the wavelength of light. From cheeks and forehead of 12 Korean adults, skin images are acquired with three different light sources (470 nm, 870 nm and broadband light) and skin elasticity is measured. The root mean square error between the measured data and the fitted model is "0.27" (870 nm), "0.49" (broadband light) and "1.42" (470 nm). Furthermore, the results are analyzed by classifying by sex, age and measurement area. This study demonstrates the possibility of developing noncontact home-use devices to measure skin elasticity in the future.
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Affiliation(s)
- Geunho Jung
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Min Young Lee
- Department of Dermatology, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Sungchul Kim
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Jee-Bum Lee
- Department of Dermatology, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jae G Kim
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
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31
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Sano M, Hirakawa S, Yamanaka Y, Naruse E, Inuzuka K, Saito T, Katahashi K, Yata T, Kayama T, Tsuyuki H, Yamamoto N, Takeuchi H, Unno N. Development of a Noninvasive Skin Evaluation Method for Lower Limb Lymphedema. Lymphat Res Biol 2019; 18:7-15. [PMID: 31211932 DOI: 10.1089/lrb.2018.0089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Background: The skin's condition is altered in lymphedema patients, and evaluating this change is important. Some noninvasive methods for evaluating skin condition have been reported, especially in upper limb lymphedema. However, evaluating the skin in lower limb lymphedema remains challenging and is often limited to palpation. We aimed to develop a noninvasive skin evaluation method for lower limb lymphedema patients. Methods and Results: Twenty-five lower limb lymphedema patients were included. Skin induration and elasticity were measured using Indentometer® IDM 400 and Cutometer® MPA580. The relationship between the properties of skin from the healthy forearm and thigh, those of the affected thigh, and age was analyzed. Predicted skin induration age (IA) and elasticity age (EA) were calculated from the forearm, whereas actual values were calculated from the thigh, and the differences (ΔIA and ΔEA) were assessed. Patients were classified according to the International Society of Lymphology clinical staging system, and the differences in ΔIA and ΔEA were analyzed among the three groups (healthy, stage I/IIa, and stage IIb/III). Skin biopsy was performed in five unilateral lower limb lymphedema patients, and the dermal elastic fiber area was determined using microscopy with Elastica van Gieson staining. ΔEA significantly increased with disease progression, but ΔIA did not change significantly. Microscopy revealed elastic fiber filamentous changes, with decreased elastic fiber areas in lymphedema-affected skin. Conclusion: To our knowledge, this is the first report to evaluate lower limb skin elasticity in lymphedema quantitatively and noninvasively. ΔEA is useful for evaluating skin condition progression in lymphedema patients.
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Affiliation(s)
- Masaki Sano
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Satoshi Hirakawa
- Institute for NanoSuit Research, Preeminent Medical Photonics Education & Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yuta Yamanaka
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu Medical Center, Hamamatsu, Japan
| | - Ena Naruse
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kazunori Inuzuka
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takaaki Saito
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kazuto Katahashi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tatsuro Yata
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takafumi Kayama
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hajime Tsuyuki
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoto Yamamoto
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu Medical Center, Hamamatsu, Japan
| | - Hiroya Takeuchi
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoki Unno
- Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Department of Vascular Surgery, Hamamatsu Medical Center, Hamamatsu, Japan
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32
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Salomão Calixto L, Picard C, Savary G, Campos PMBGM. Skin characterization and immediate effects of different dermocosmetic treatments in French and Brazilian skin. J Cosmet Dermatol 2019; 19:466-472. [PMID: 31125171 DOI: 10.1111/jocd.13003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/24/2019] [Accepted: 05/02/2019] [Indexed: 01/03/2023]
Abstract
BACKGROUND All over the world, people face the same skin problems. However, their skin characteristics are different. Thus, it is a challenge to prescribe treatments that will be effective on different skin types. Therefore, it is very important to consider the skin biology when indicating a dermocosmetic treatment. OBJECTIVES To assess skin biophysical parameters in French and Brazilian subjects and to verify the efficacy of four dermocosmetic treatments in these populations. METHODS Five test areas were defined on each volar forearm of the eighteen Brazilian and eighteen French participants using a randomized design. Biophysical measurements in terms of skin hydration, skin barrier function, skin brightness, and skin viscoelasticity were performed before and after 60 minutes of treatment. RESULTS Skin biophysical differences between populations were found. French skin has been shown to be more hydrated regarding epidermal mechanic properties and stratum corneum water content and more radiant when compared with Brazilian skin. However, it showed more signs of cutaneous aging and fatigue effects on skin. The Brazilian skin showed better skin barrier function. In addition, the treatments were effective in both populations. CONCLUSIONS Despite the differences found in French and Brazilian skin, the proposed dermocosmetic treatments showed effective in both populations.
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Affiliation(s)
- Lívia Salomão Calixto
- School of Pharmaceutical Sciences of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Céline Picard
- UNILEHAVRE, FR 3038 CNRS, URCOM, Normandie Univ, Le Havre, France
| | - Géraldine Savary
- UNILEHAVRE, FR 3038 CNRS, URCOM, Normandie Univ, Le Havre, France
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33
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Pierre J, Francois G, Benize AM, Rubert V, Coutet J, Flament F. Mapping, in vivo, the uniformity of two skin properties alongside the human face by a 3D virtual approach. Int J Cosmet Sci 2019; 40:482-487. [PMID: 30107030 DOI: 10.1111/ics.12488] [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: 05/04/2018] [Accepted: 06/20/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the homogeneity in the distribution of two cutaneous functions (hydration and elasticity) along the entire human face. MATERIAL AND METHODS The half faces (right or left, randomly chosen) of two groups of Caucasian women were measured on 24 different small sites (elasticity) and 41 others (hydration), by instruments of small-sized probes (Cutometer® and Corneometer® , respectively). Hydration of the face was recorded at different times (up to 24 h), post application of a highly hydrating product. The recorded values (left and right half faces) were further gathered and digitally positioned on a virtual feminine face and their intensity was illustrated through a colored white (lower values)-blue (higher values) scale. RESULTS The reconstitution of the mapping of the two measured parameters (from the left and right sides of different subjects), shows a perfect symmetry vis à vis the nose axis. However, both parameters present slightly variable but significant values along the human face. Sites from the temple are less elastic than chin or forehead. The upper and lower parts of the forehead show slight disparities in their elasticity values. Cheeks are significantly less prone at retaining their imparted hydration status (lost 2 h after application of a hydrating product) as compared to sub-ocular regions or chin that retain their hydration up to 24 h. Attempts to establish a mutual relationship between the two skin properties unsurprisingly failed. CONCLUSION The two studied skin properties show a slight but highly symmetric disparity along the entire human face.
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Affiliation(s)
- J Pierre
- L'Oréal Research and Innovation, Chevilly Larue, France
| | - G Francois
- L'Oréal Research and Innovation, Chevilly Larue, France
| | - A M Benize
- L'Oréal Research and Innovation, Chevilly Larue, France
| | - V Rubert
- L'Oréal Research and Innovation, Chevilly Larue, France
| | - J Coutet
- L'Oréal Research and Innovation, Chevilly Larue, France
| | - F Flament
- L'Oréal Research and Innovation, Chevilly Larue, France
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Cho C, Cho E, Kim N, Shin J, Woo S, Lee E, Hwang J, Ha J. Age‐related biophysical changes of the epidermal and dermal skin in Korean women. Skin Res Technol 2019; 25:504-511. [DOI: 10.1111/srt.12679] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/09/2018] [Accepted: 01/12/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Changhui Cho
- Department of Genetic EngineeringCollege of Life SciencesGraduate School of BiotechnologyKyung Hee University Yongin‐si Korea
| | - Eunbyul Cho
- Clinical Research CenterInstitut d'Expertise Clinique (IEC) Korea Suwon Korea
| | - Nahee Kim
- Clinical Research CenterInstitut d'Expertise Clinique (IEC) Korea Suwon Korea
| | - Juhee Shin
- Clinical Research CenterInstitut d'Expertise Clinique (IEC) Korea Suwon Korea
| | - Sanga Woo
- Clinical Research CenterInstitut d'Expertise Clinique (IEC) Korea Suwon Korea
| | - Eunyoung Lee
- Clinical Research CenterInstitut d'Expertise Clinique (IEC) Korea Suwon Korea
| | - Jaesung Hwang
- Department of Genetic EngineeringCollege of Life SciencesGraduate School of BiotechnologyKyung Hee University Yongin‐si Korea
| | - Jaehyoun Ha
- Clinical Research CenterInstitut d'Expertise Clinique (IEC) Korea Suwon Korea
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Cortés H, Magaña JJ, Reyes‐Hernández OD, Zacaula‐Juárez N, González‐Torres M, Diaz‐Beltrán W, León‐Trejo MC, Cariño‐Calvo L, Leyva‐Gómez G, González‐Del Carmen M. Non‐invasive analysis of skin mechanical properties in patients with lamellar ichthyosis. Skin Res Technol 2019; 25:375-381. [DOI: 10.1111/srt.12663] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 10/01/2018] [Accepted: 12/08/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Hernán Cortés
- Laboratorio de Medicina GenómicaDepartamento de GenéticaInstituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra Ciudad de México México
| | - Jonathan J. Magaña
- Laboratorio de Medicina GenómicaDepartamento de GenéticaInstituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra Ciudad de México México
| | - Octavio D. Reyes‐Hernández
- Laboratorio de Biología Molecular del CáncerUMIEZFacultad de Estudios Superiores ZaragozaUniversidad Nacional Autónoma de México Ciudad de México México
| | - Noé Zacaula‐Juárez
- Escuela Superior de MedicinaInstituto Politécnico Nacional Ciudad de México México
- Laboratorio de Tejido ConjuntivoInstituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra Ciudad de México México
| | - Maykel González‐Torres
- Conacyt‐Laboratorio de BiotecnologíaInstituto Nacional de Rehabilitación “Luís Guillermo Ibarra Ibarra” Ciudad de Mexico México
- Instituto Tecnológico y de Estudios Superiores de Monterrey Campus Ciudad de México México
| | | | | | | | - Gerardo Leyva‐Gómez
- Departamento de FarmaciaFacultad de QuímicaUniversidad Nacional Autónoma de México Ciudad de México México
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36
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A comprehensive in vivo study of Caucasian facial skin parameters on 442 women. Arch Dermatol Res 2018; 310:691-699. [DOI: 10.1007/s00403-018-1860-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/05/2018] [Accepted: 08/26/2018] [Indexed: 10/28/2022]
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37
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Xu Z, Dela Cruz J, Fthenakis C, Saliou C. A novel method to measure skin mechanical properties with three-dimensional digital image correlation. Skin Res Technol 2018; 25:60-67. [DOI: 10.1111/srt.12596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Z. Xu
- Clinical Innovation Research Division; The Estee Lauder Companies, Inc.; Melville NY USA
| | - J. Dela Cruz
- Clinical Innovation Research Division; The Estee Lauder Companies, Inc.; Melville NY USA
| | - C. Fthenakis
- Clinical Innovation Research Division; The Estee Lauder Companies, Inc.; Melville NY USA
| | - C. Saliou
- Clinical Innovation Research Division; The Estee Lauder Companies, Inc.; Melville NY USA
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De Groef A, Van Kampen M, Moortgat P, Anthonissen M, Van den Kerckhove E, Christiaens MR, Neven P, Geraerts I, Devoogdt N. An evaluation tool for Myofascial Adhesions in Patients after Breast Cancer (MAP-BC evaluation tool): Concurrent, face and content validity. PLoS One 2018. [PMID: 29522540 PMCID: PMC5844553 DOI: 10.1371/journal.pone.0193915] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Purpose To investigate the concurrent, face and content validity of an evaluation tool for Myofascial Adhesions in Patients after Breast Cancer (MAP-BC evaluation tool). Methods 1) Concurrent validity of the MAP-BC evaluation tool was investigated by exploring correlations (Spearman’s rank Correlation Coefficient) between the subjective scores (0 –no adhesions to 3 –very strong adhesions) of the skin level using the MAP-BC evaluation tool and objective elasticity parameters (maximal skin extension and gross elasticity) generated by the Cutometer Dual MPA 580. Nine different examination points on and around the mastectomy scar were evaluated. 2) Face and content validity were explored by questioning therapists experienced with myofascial therapy in breast cancer patients about the comprehensibility and comprehensiveness of the MAP-BC evaluation tool. Results 1) Only three meaningful correlations were found on the mastectomy scar. For the most lateral examination point on the mastectomy scar a moderate negative correlation (-0.44, p = 0.01) with the maximal skin extension and a moderate positive correlation with the resistance versus ability of returning or ‘gross elasticity’ (0.42, p = 0.02) were found. For the middle point on the mastectomy scar an almost moderate positive correlation with gross elasticity was found as well (0.38, p = 0.04) 2) Content and face validity have been found to be good. Eighty-nine percent of the respondent found the instructions understandable and 98% found the scoring system obvious. Thirty-seven percent of the therapists suggested to add the possibility to evaluate additional anatomical locations in case of reconstructive and/or bilateral surgery. Conclusions The MAP-BC evaluation tool for myofascial adhesions in breast cancer patients has good face and content validity. Evidence for good concurrent validity of the skin level was found only on the mastectomy scar itself.
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Affiliation(s)
- An De Groef
- KU Leuven–University of Leuven, Department of Rehabilitation Sciences; University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, Leuven, Belgium
- * E-mail:
| | - Marijke Van Kampen
- KU Leuven–University of Leuven, Department of Rehabilitation Sciences; University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, Leuven, Belgium
| | - Peter Moortgat
- Oscare, Organisation for Burns, Scar After-care and Research, Antwerp, Belgium
| | - Mieke Anthonissen
- KU Leuven–University of Leuven, Department of Rehabilitation Sciences; University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, Leuven, Belgium
- Oscare, Organisation for Burns, Scar After-care and Research, Antwerp, Belgium
| | - Eric Van den Kerckhove
- KU Leuven–University of Leuven, Department of Rehabilitation Sciences; University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, Leuven, Belgium
- Maastricht University Medical Centre, Department of Plastic Surgery, Maastricht, The Netherlands
| | - Marie-Rose Christiaens
- University Hospitals Leuven, Multidisciplinary Breast Center, Leuven, Belgium
- KU Leuven–University of Leuven, Department of Surgical Oncology, Leuven, Belgium
| | - Patrick Neven
- University Hospitals Leuven, Multidisciplinary Breast Center, Leuven, Belgium
- University Hospitals Leuven, Department of Obstetrics and Gynecology, Leuven, Belgium
| | - Inge Geraerts
- KU Leuven–University of Leuven, Department of Rehabilitation Sciences; University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, Leuven, Belgium
| | - Nele Devoogdt
- KU Leuven–University of Leuven, Department of Rehabilitation Sciences; University Hospitals Leuven, Department of Physical Medicine and Rehabilitation, Leuven, Belgium
- University Hospitals Leuven, Department of Vascular Surgery, Leuven, Belgium
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39
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Kim MA, Kim EJ, Lee HK. Use of SkinFibrometer®to measure skin elasticity and its correlation with Cutometer®and DUB®Skinscanner. Skin Res Technol 2018; 24:466-471. [DOI: 10.1111/srt.12455] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2018] [Indexed: 12/22/2022]
Affiliation(s)
- M. A. Kim
- Skincare Research InstituteAMOREPACIFIC R&D Center Yongin Korea
| | - E. J. Kim
- Skincare Research InstituteAMOREPACIFIC R&D Center Yongin Korea
| | - H. K. Lee
- Skincare Research InstituteAMOREPACIFIC R&D Center Yongin Korea
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40
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Hara Y, Ogura Y, Yamashita T, Furukawa D, Saeki S. Visualization of viscoelastic behavior in skin equivalent using optical coherence tomography-based straingraphy. Skin Res Technol 2018; 24:334-339. [PMID: 29368351 DOI: 10.1111/srt.12435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/31/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND/PURPOSE The relationships between the skin components and these mechanical roles are still unclear. To clarify these relationships, we investigated spatial mapping of the mechanical behavior of cultured skin equivalents (SEs) using optical coherence tomography (OCT)-based straingraphy. METHODS We built a strain relaxation test system combined with OCT and developed an algorithm that could visualize a time-dependent strain distribution, named dynamic-optical coherence straingraphy (D-OCSA). Using this system, we analyzed how the spatial mechanical changes in the SEs depended on the culture duration. For quantitative analysis of viscoelastic behavior, we defined a relaxation attenuation coefficient of strain rate, which indicates the ratio of viscosity and elasticity in the Klevin-Voight model. RESULTS By culturing for 4 days in comparison to culturing for 1 day, the strain relaxation attenuation coefficient of the whole skin, especially at the region of the dermal-epidermal junction (DEJ), significantly increased in the negative direction. In tissue slices taken for microscopy, several cracks were observed in the SEs cultured for 4 days. CONCLUSION This study is the first to provide quantified evidence that the DEJ is a dynamically specialized region. An OCT-based straingraphy system (D-OCSA) would be beneficial for evaluating the quality of SEs, as well as functional analysis of their mechanics.
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Affiliation(s)
- Y Hara
- Shiseido Research Center, Kanagawa, Japan.,Mechanical and Physical Engineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
| | - Y Ogura
- Shiseido Research Center, Kanagawa, Japan
| | | | - D Furukawa
- Mechanical and Physical Engineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
| | - S Saeki
- Mechanical and Physical Engineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
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41
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Mayrovitz HN, Wong J, Fasen M. Age and Hydration dependence of jowl and forearm skin firmness in young and mature women. J Cosmet Dermatol 2017; 17:1262-1270. [PMID: 29280546 DOI: 10.1111/jocd.12477] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND Quantitative assessment of possible linkages between skin's firmness and water content is useful for cosmetic and clinical purposes and to better understand features of advancing age. OBJECTIVES Our goals were to characterize age-related differential features in skin firmness in women and determine the relationship between skin firmness and indices of skin water. METHODS Skin firmness was quantified using handheld devices that measure the force to indent skin 0.3 and 1.3 mm (F0.3 and F1.3). Skin hydration was quantified using handheld devices that measured tissue dielectric constant (TDC) at 300 MHz to skin depths of 0.5 and 2.0-2.5 mm. All parameters were measured bilaterally in the jowl area and volar forearm of 60 women grouped by age <45 years (YOUNG) and ≥45 years old (MATURE). RESULTS All measured parameters were bilaterally symmetrical at jowl and forearm. Forearm and jowl indentation forces were greater in YOUNG with statistically significant declines with advancing age with regression relations most evident at shallower indentation depths (P < .001). Quantitative relations for arm and jowl were F0.3 = 0.256 × AGE + 32.7 mN and F0.3 = -0.07 × AGE + 17.7 mN. Firmness was related to TDC values only when indentation force and TDC were assessed on the arm at the shallowest skin depths, as weakly related to firmness and was observed to change with age only when measured to a depth of 0.5 mm represented by TDC5 = 0.096 × AGE + 32.7. CONCLUSIONS Experimental finding show clear differences in skin firmness between age-groups with skin hydration playing a minor role. Possible explanations and suggestions for further studies are provided.
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Affiliation(s)
- Harvey N Mayrovitz
- College of Medical Sciences, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Jennifer Wong
- College of Medical Sciences, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Madeline Fasen
- College of Medical Sciences, Nova Southeastern University, Fort Lauderdale, FL, USA
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42
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Martini D, Angelino D, Cortelazzi C, Zavaroni I, Bedogni G, Musci M, Pruneti C, Passeri G, Ventura M, Galli D, Mirandola P, Vitale M, Dei Cas A, Bonadonna RC, Di Nuzzo S, De Felici MB, Del Rio D. Claimed Effects, Outcome Variables and Methods of Measurement for Health Claims Proposed Under European Community Regulation 1924/2006 in the Framework of Maintenance of Skin Function. Nutrients 2017; 10:nu10010007. [PMID: 29271939 PMCID: PMC5793235 DOI: 10.3390/nu10010007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/16/2017] [Accepted: 12/19/2017] [Indexed: 12/20/2022] Open
Abstract
Evidence suggests a protective role for several nutrients and foods in the maintenance of skin function. Nevertheless, all the requests for authorization to use health claims under Article 13(5) in the framework of maintenance of skin function presented to the European Food Safety Authority (EFSA) have received a negative opinion. Reasons for such failures are mainly due to an insufficient substantiation of the claimed effects, including the choice of inappropriate outcome variables (OVs) and methods of measurement (MMs). The present paper reports the results of an investigation aimed at collecting, collating and critically analyzing the information with relation to claimed effects (CEs), OVs and MMs related to skin health compliance with Regulation 1924/2006. CEs, OVs and MMs were collected from both the EFSA Guidance document and from the authorization requests of health claims under Article 13(5). The critical analysis of OVs and MMs was based on a literature review, and was aimed at defining their appropriateness (alone or in combination with others) in the context of a specific CE. The results highlight the importance of an adequate choice of OVs and MMs for an effective substantiation of the claims.
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Affiliation(s)
- Daniela Martini
- The Laboratory of Phytochemicals in Physiology, Department of Food and Drug, University of Parma, 43125 Parma, Italy; (D.M.); (D.A.)
| | - Donato Angelino
- The Laboratory of Phytochemicals in Physiology, Department of Food and Drug, University of Parma, 43125 Parma, Italy; (D.M.); (D.A.)
| | - Chiara Cortelazzi
- Department of Medicine and Surgery, Section of Dermatology, University of Parma, 43125 Parma, Italy; (C.C.); (S.D.N.); (M.B.D.F.)
| | - Ivana Zavaroni
- Department of Medicine and Surgery, Division of Endocrinology, University of Parma, 43125 Parma, Italy; (I.Z.); (A.D.C.); (R.C.B.)
- The Azienda Ospedaliera Universitaria of Parma, Division of Endocrinology, 43125 Parma, Italy
| | - Giorgio Bedogni
- Clinical Epidemiology Unit, Liver Research Center, Basovizza, 34149 Trieste, Italy;
| | - Marilena Musci
- Department of Food and Drug, University of Parma, 43125 Parma, Italy;
| | - Carlo Pruneti
- Department of Medicine and Surgery, Clinical Psychology Unit, University of Parma, 43125 Parma, Italy;
| | - Giovanni Passeri
- Department of Medicine and Surgery, University of Parma, Building Clinica Medica Generale, 43125 Parma, Italy;
| | - Marco Ventura
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43125 Parma, Italy;
| | - Daniela Galli
- Department of Medicine and Surgery, Sport and Exercise Medicine Centre (SEM), University of Parma, 43125 Parma, Italy; (D.G.); (P.M.); (M.V.)
| | - Prisco Mirandola
- Department of Medicine and Surgery, Sport and Exercise Medicine Centre (SEM), University of Parma, 43125 Parma, Italy; (D.G.); (P.M.); (M.V.)
| | - Marco Vitale
- Department of Medicine and Surgery, Sport and Exercise Medicine Centre (SEM), University of Parma, 43125 Parma, Italy; (D.G.); (P.M.); (M.V.)
| | - Alessandra Dei Cas
- Department of Medicine and Surgery, Division of Endocrinology, University of Parma, 43125 Parma, Italy; (I.Z.); (A.D.C.); (R.C.B.)
- The Azienda Ospedaliera Universitaria of Parma, Division of Endocrinology, 43125 Parma, Italy
| | - Riccardo C. Bonadonna
- Department of Medicine and Surgery, Division of Endocrinology, University of Parma, 43125 Parma, Italy; (I.Z.); (A.D.C.); (R.C.B.)
- The Azienda Ospedaliera Universitaria of Parma, Division of Endocrinology, 43125 Parma, Italy
| | - Sergio Di Nuzzo
- Department of Medicine and Surgery, Section of Dermatology, University of Parma, 43125 Parma, Italy; (C.C.); (S.D.N.); (M.B.D.F.)
| | - Maria Beatrice De Felici
- Department of Medicine and Surgery, Section of Dermatology, University of Parma, 43125 Parma, Italy; (C.C.); (S.D.N.); (M.B.D.F.)
| | - Daniele Del Rio
- The Laboratory of Phytochemicals in Physiology, Department of Food and Drug, University of Parma, 43125 Parma, Italy; (D.M.); (D.A.)
- Correspondence: ; Tel.: +39-0521-903830
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Flament F, Bazin R. Influences of age, ethnic group, and skin sites on a provisory skin marking, experimentally induced, in vivo. Skin Res Technol 2017; 24:180-186. [PMID: 29131424 DOI: 10.1111/srt.12411] [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: 09/10/2017] [Indexed: 12/23/2022]
Abstract
BACKGROUND To study capacity of skin to being imprinted by a marking head rapidly applied (10 seconds) onto the skin under a standardized pressure (15 kPa). MATERIAL AND METHODS Referential photographs of skin markings, resulting from different times of application serve at grading the extent of skin imprints. The imprinting tool, equipped with 5 linear bulbs of different sizes but same thickness (1 mm), was applied onto the cheeks of 641 women of different ages (18-80 years) of 3 different ethnic groups. In the cohort of 198 Caucasian women, the marking head was pressed onto 3 different sites (outer arm, cheek, and dorsal forearm) and the kinetics of skin recovery from cheek marking was recorded on a smaller and younger part of this Caucasian cohort, ie, 141 Caucasian women, aged 18-59 years. RESULTS The recorded intensities of skin markings were found highly correlated with age in all 3 studied ethnic groups (Chinese, African-American, and Caucasian). Caucasian women seem more sensitive to the marking and the kinetics of recovery from such imprint was found highly dependent from its intensity, ie, the higher the grades, the slower the recovery. In Caucasian women, intensities were different between skin sites, where arm showed higher resistance to marking. Possible impact of photo-aging on the decreased skin resistance to such provoked deformation is likely of minor amplitude, as compared to the one induced by chronological aging. CONCLUSION This method offers a new vision on skin aging, in its variable response to a standard deformation that appears mostly driven by chronological aging.
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Affiliation(s)
- F Flament
- L'Oréal Research and Innovation, Paris, France
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44
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Sakata A, Abe K, Mizukoshi K, Gomi T, Okuda I. Relationship between the retinacula cutis and sagging facial skin. Skin Res Technol 2017; 24:93-98. [DOI: 10.1111/srt.12395] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2017] [Indexed: 11/30/2022]
Affiliation(s)
- A. Sakata
- Skin Research Department; POLA Chemical Industries; Inc.; Yokohama Kanagawa Japan
| | - K. Abe
- Sanno Medical Center; International University of Health and Welfare; Minato-ku Tokyo Japan
| | - K. Mizukoshi
- Skin Research Department; POLA Chemical Industries; Inc.; Yokohama Kanagawa Japan
| | - T. Gomi
- Skin Research Department; POLA Chemical Industries; Inc.; Yokohama Kanagawa Japan
| | - I. Okuda
- Department of Diagnostic Radiology; Mita Hospital; International University of Health and Welfare; Minato-ku Tokyo Japan
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45
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Carvalho PRS, Sumita JM, Soares JLM, Sanudo A, Bagatin E. Forearm skin aging: characterization by instrumental measurements. Int J Cosmet Sci 2017; 39:564-571. [PMID: 28563677 DOI: 10.1111/ics.12407] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 05/11/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND The intrinsic ageing and photoaged skin present biomechanical and morphological differences, which are reflected in the appearance of roughness, superficial and deep wrinkles, atrophy, reduced elasticity, hypo- and hyperpigmentation and actinic keratosis. OBJECTIVE To evaluate and compare the characteristics of the flexor (with a predominance of intrinsic ageing) and extensor (chronically exposed to sunlight and other environmental factors, with a predominance of photoageing) skin surfaces of the forearms. METHODS Interventional, prospective, diagnostic study, including 23 females, aged over 60 years. The extensor and flexor faces of forearms were compared in relation to clinical parameters and non-invasive instrumental measurements, such as skin surface, elasticity, hydration as well as dermal thickness and echogenicity. RESULTS Regarding the water content of the stratum corneum, the flexor face presented an average value higher than the extensor face. The average of measures obtained through images of high-frequency ultrasound demonstrated greater echogenicity of flexor face compared to the extensor face. The measurements of the skin surface showed significant differences between the faces. The roughness and scaliness were lower in the flexor face. Regarding the depth of wrinkles, there was no significant difference between the faces. The average of the measurements was slightly higher in the flexor face, which demonstrated that wrinkles are present in the intrinsic ageing and photoageing. The presence of elastosis and the reduction in elasticity in the clinical aspect of the photoaged face of forearms were according to the results of the non-invasive measurements. CONCLUSION Meaningful differences in the biophysical characteristics of the extensor and flexor faces of the forearms were detected. Because the non-invasive instrumental measurements correlated with clinical findings, they may represent useful tools to assess efficacy and safety of skin ageing treatments in clinical research.
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Affiliation(s)
- P R S Carvalho
- Department of Dermatology, Federal University of Sao Paulo - UNIFESP, Sao Paulo, Brazil
| | - J M Sumita
- Department of Dermatology, Federal University of Sao Paulo - UNIFESP, Sao Paulo, Brazil
| | - J L M Soares
- Department of Dermatology, Federal University of Sao Paulo - UNIFESP, Sao Paulo, Brazil
| | - A Sanudo
- Department of Preventive Medicine, Federal University of Sao Paulo - UNIFESP, Sao Paulo, Brazil
| | - E Bagatin
- Department of Dermatology, Federal University of Sao Paulo - UNIFESP, Sao Paulo, Brazil
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46
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Langton AK, Graham HK, McConnell JC, Sherratt MJ, Griffiths CEM, Watson REB. Organization of the dermal matrix impacts the biomechanical properties of skin. Br J Dermatol 2017; 177:818-827. [PMID: 28132410 DOI: 10.1111/bjd.15353] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2017] [Indexed: 11/29/2022]
Abstract
BACKGROUND Human skin has the crucial roles of maintaining homeostasis and protecting against the external environment. Skin offers protection against mechanical trauma due to the reversible deformation of its structure; these biomechanical properties are amenable to dynamic testing using noninvasive devices. OBJECTIVES To characterize the biomechanical properties of young, black African/African-Caribbean and white Northern European skin from different anatomical sites, and to relate underlying skin architecture to biomechanical function. METHODS Using cutometry and ballistometry, the biomechanical properties of buttock and dorsal forearm skin were determined in black African/African-Caribbean (n = 18) and white Northern European (n = 20) individuals aged 18-30 years. Skin biopsies were obtained from a subset of the volunteers (black African/African-Caribbean, n = 5; white Northern European, n = 6) and processed for histological and immunohistochemical detection of the major elastic fibre components and fibrillar collagens. RESULTS We have determined that healthy skin from young African and white Northern European individuals has similar biomechanical properties (F3): the skin is resilient (capable of returning to its original position following deformation, R1), exhibits minimal fatigue (R4) and is highly elastic (R2, R5 and R7). At the histological level, skin with these biomechanical properties is imbued with strong interdigitation of the rete ridges at the dermoepidermal junction (DEJ) and candelabra-like arrays of elastic fibres throughout the papillary dermis. Dramatic disruption to this highly organized arrangement of elastic fibres, effacement of the rete ridges and alterations to the alignment of the fibrillar collagens is apparent in the white Northern European forearm and coincides with a marked decline in biomechanical function. CONCLUSIONS Maintenance of skin architecture - both epidermal morphology and elastic fibre arrangement - is essential for optimal skin biomechanical properties. Disruption to underlying skin architecture, as observed in the young white Northern European forearm, compromises biomechanical function.
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Affiliation(s)
- A K Langton
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester, U.K.,NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, U.K
| | - H K Graham
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester, U.K.,NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, U.K
| | - J C McConnell
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, U.K
| | - M J Sherratt
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, U.K
| | - C E M Griffiths
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester, U.K.,NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, U.K
| | - R E B Watson
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester, U.K.,NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, U.K
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Effects of two different fabrics on skin barrier function under real pressure conditions. J Tissue Viability 2017; 26:150-155. [DOI: 10.1016/j.jtv.2016.10.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 10/15/2016] [Accepted: 10/18/2016] [Indexed: 12/21/2022]
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Poetschke J, Dornseifer U, Clementoni MT, Reinholz M, Schwaiger H, Steckmeier S, Ruzicka T, Gauglitz GG. Ultrapulsed fractional ablative carbon dioxide laser treatment of hypertrophic burn scars: evaluation of an in-patient controlled, standardized treatment approach. Lasers Med Sci 2017; 32:1031-1040. [DOI: 10.1007/s10103-017-2204-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 03/29/2017] [Indexed: 10/19/2022]
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Tanaka M, Yamamoto Y, Misawa E, Nabeshima K, Saito M, Yamauchi K, Abe F, Furukawa F. Effects of Aloe Sterol Supplementation on Skin Elasticity, Hydration, and Collagen Score: A 12-Week Double-Blind, Randomized, Controlled Trial. Skin Pharmacol Physiol 2017; 29:309-317. [DOI: 10.1159/000454718] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 11/22/2016] [Indexed: 11/19/2022]
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Nomura M, Velleman D, Pierre J, Flament F. Quantitating the lateral skin stiffness by a new and versatile electro-mechanical instrument. Preliminary studies. Skin Res Technol 2016; 23:272-282. [PMID: 27896851 DOI: 10.1111/srt.12331] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND A new electro-mechanical device for measuring the lateral stiffness of the skin is now available. It basically allows to recording the forces that the skin opposes to a lateral displacement (1-2 mm) of a pinching type movement. Preliminary assays of this device to various skin sites and an artificial substrate aimed at defining its major characteristics (sensitivity, reproducibility, variations according to skin site). METHODS The calibration of the device (Khelometer® ) and assessment of its reproducibility were carried out through the use of elastometer substrates of various stiffness's. The device was then used, in vivo, at different skin sites (scalp, inner and outer forearms, cheeks) of 213 healthy Japanese women of various ages. The short-time effect of a hydrating regimen (7% glycerol) was recorded on the outer forearm. RESULTS This new device offers an appreciable reproducibility in vitro and in vivo (coefficient of variation of 2-4% and 5-14%, respectively). Unlike other biophysical methods, the Khelometer® can be easily applied onto the human scalp that shows a higher stiffness than the two other skin sites, increasing with age and presence of alopecia. In all the three studied skin sites, the impact of age leads to significantly higher lateral skin stiffness (LSS, expressed as N/mm) values. The latter were found significantly different between the two sides of the forearms where the outer (sun-exposed) side showed statistically slightly higher LSS, than the unexposed inner side. LSS values found on cheeks (≈0.5 N/mm) were about four times lower than those of the scalp (≈2 N/mm) and about half those of forearms (≈1 N/mm). The effect of a 7% glycerol based formula was recorded 20 min post application onto the forearm, leading to a slight drop in LSS (approx. 15%) as compared to a vehicle-applied skin site. CONCLUSION These preliminary studies clearly indicate that this new device, applicable to any skin site, offers appreciable assets such as sensitivity and reproducibility. Accordingly, it appears as a new approach in the non-invasive biophysical measurements of the skin surface, in both advanced and applied research investigations.
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Affiliation(s)
- M Nomura
- Nihon L'Oréal Research and Innovation, Kawasaki, Japan
| | - D Velleman
- Nihon L'Oréal Research and Innovation, Kawasaki, Japan
| | - J Pierre
- L'Oréal Research and Innovation, Chevilly-Larue, France
| | - F Flament
- L'Oréal Research and Innovation, Chevilly-Larue, France
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