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Silva-Abreu M, Sosa L, Espinoza LC, Fábrega MJ, Rodríguez-Lagunas MJ, Mallandrich M, Calpena AC, Garduño-Ramírez ML, Rincón M. Efficacy of Apremilast Gels in Mouse Model of Imiquimod-Induced Psoriasis Skin Inflammation. Pharmaceutics 2023; 15:2403. [PMID: 37896163 PMCID: PMC10610068 DOI: 10.3390/pharmaceutics15102403] [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: 08/22/2023] [Revised: 09/24/2023] [Accepted: 09/26/2023] [Indexed: 10/29/2023] Open
Abstract
Apremilast (APM) is a novel drug for the treatment of psoriasis and psoriatic arthritis. APM is a phosphodiesterase 4 (PDE4) inhibitor, raising intracellular cAMP levels and thereby decreasing the inflammatory response by modulating the expression of TNF-α, IL-17, IL-23, and other inflammatory cytokines. The goal of this study is to develop APM gels as a new pharmaceutical formulation for the treatment of topical psoriasis. APM was solubilized in Transcutol-P and incorporated into Pluronic F127, Sepigel, and carbomer bases at different proportions. All formulations were characterized physiochemically. A biopharmaceutical study (release profile) was performed, and ex vivo permeation was evaluated using a human skin model. A toxicity assay was carried out on the HaCaT cell line. A mouse model of imiquimod-induced psoriasis skin inflammation was carried out to determine its efficacy by histological analysis, RNA extraction, and RT-qPCR assays. APM gel formulations showed good physicochemical characteristics and a sustained release profile. There was no permeation of any gel measured through human skin, indicating a high retained amount of APM on the skin. Cell viability was greater than 80% at most dilution concentrations. APM gels treated the psoriasis mouse model, and it shows a reduction in the proinflammatory cytokines (IL-8, IL-17A, IL-17F, and IL-23). APM gels could be a new approach for the treatment of topical psoriasis.
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Affiliation(s)
- Marcelle Silva-Abreu
- Departament de Farmàcia, Tecnologia Farmacèutica, i Fisicoquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona (UB), 08028 Barcelona, Spain; (M.M.); (A.C.C.)
- Institut de Nanociència i Nanotecnologia IN2UB, University of Barcelona, 08028 Barcelona, Spain; (L.C.E.); (M.R.)
| | - Lilian Sosa
- Research Institute of Applied Sciences and Technology, National Autonomous University of Honduras (UNAH), Tegucigalpa 11101, Honduras;
- Microbiology Research Institute, National Autonomous University of Honduras (UNAH), Tegucigalpa 11101, Honduras
| | - Lupe Carolina Espinoza
- Institut de Nanociència i Nanotecnologia IN2UB, University of Barcelona, 08028 Barcelona, Spain; (L.C.E.); (M.R.)
- Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador
| | - María-José Fábrega
- Department of Experimental and Health Sciences, Parc de Recerca Biomèdica de Barcelona, University Pompeu Fabra (UPF), 08005 Barcelona, Spain;
| | - María J. Rodríguez-Lagunas
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain;
- Nutrition and Food Safety Research Institute (INSA-UB), 08921 Barcelona, Spain
| | - Mireia Mallandrich
- Departament de Farmàcia, Tecnologia Farmacèutica, i Fisicoquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona (UB), 08028 Barcelona, Spain; (M.M.); (A.C.C.)
- Institut de Nanociència i Nanotecnologia IN2UB, University of Barcelona, 08028 Barcelona, Spain; (L.C.E.); (M.R.)
| | - Ana Cristina Calpena
- Departament de Farmàcia, Tecnologia Farmacèutica, i Fisicoquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona (UB), 08028 Barcelona, Spain; (M.M.); (A.C.C.)
- Institut de Nanociència i Nanotecnologia IN2UB, University of Barcelona, 08028 Barcelona, Spain; (L.C.E.); (M.R.)
| | - María Luisa Garduño-Ramírez
- Center for Chemical Research, Institute for Research Basic and Applied Sciences, Autonomous University of the State of Morelos, Av. Universidad 1001, Cuernavaca 62209, Mexico;
| | - María Rincón
- Institut de Nanociència i Nanotecnologia IN2UB, University of Barcelona, 08028 Barcelona, Spain; (L.C.E.); (M.R.)
- Departament de Ciència de Materials i Química Física, Facultat de Química, Universitat de Barcelona (UB), C. Martí i Franquès 1-11, 08028 Barcelona, Spain
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Increased production of natural moisturizing factors and bleomycin hydrolase activity in elderly human skin. J Dermatol Sci 2023; 110:2-9. [PMID: 37003921 DOI: 10.1016/j.jdermsci.2023.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/07/2023] [Accepted: 03/02/2023] [Indexed: 03/07/2023]
Abstract
BACKGROUND Bleomycin hydrolase (BH), which is expressed in the stratum granulosum and lower stratum corneum (SC), is involved in final filaggrin degradation. Furthermore, BH plays an essential role in producing free amino acids, which constitute the majority of natural moisturizing factors (NMF). However, the effects of BH expression and protease activity on human skin aging remain unclear. OBJECTIVE This study was designed to evaluate the activity and expression patterns of BH in SC extracts from healthy young and elderly individuals. METHODS SC samples were collected by tape stripping. BH activity was assessed by measuring the citrulline aminopeptidase activity. BH expression was determined by Western blotting, and NMF was quantified by liquid chromatography/mass spectrometry. Skin barrier function was determined by measuring SC hydration, transepidermal water loss (TEWL), and skin pH. RESULTS The activity and expression of BH were higher in the elderly skin than in young skin, and BH activity was correlated with BH expression levels. Evaluation of the NMF showed that the levels of total amino acids, such as glycine, serine, aspartic acid, citrulline, pyrrolidone carboxylic acid (a metabolite of glutamic acid), and trans-urocanic acid (a metabolite of histidine), were significantly higher in elderly skin than in young skin. Moreover, SC hydration and TEWL were significantly lower in elderly, indicating dry skin, and pH was significantly higher in elderly, indicating greater skin alkalinization. CONCLUSION These results suggest that BH activity and expression, as well as NMF amino acids, increase in elderly people as compensatory mechanisms against dry skin.
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Man M, Wakefield JS, Mauro TM, Elias PM. Alterations in epidermal function in type 2 diabetes: Implications for the management of this disease. J Diabetes 2022; 14:586-595. [PMID: 36043448 PMCID: PMC9512766 DOI: 10.1111/1753-0407.13303] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/14/2022] [Accepted: 07/30/2022] [Indexed: 12/15/2022] Open
Abstract
Epidermal function is regulated by numerous exogenous and endogenous factors, including age, psychological stress, certain skin disorders, ultraviolet irradiation and pollution, and epidermal function itself can regulate cutaneous and extracutaneous functions. The biophysical properties of the stratum corneum reflect the status of both epidermal function and systemic conditions. Type 2 diabetes in both murine models and humans displays alterations in epidermal functions, including reduced levels of stratum corneum hydration and increased epidermal permeability as well as delayed permeability barrier recovery, which can all provoke and exacerbate cutaneous inflammation. Because inflammation plays a pathogenic role in type 2 diabetes, a therapy that improves epidermal functions could be an alternative approach to mitigating type 2 diabetes and its associated cutaneous disorders.
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Affiliation(s)
- Mao‐Qiang Man
- Dermatology Hospital of Southern Medical UniversityGuangzhouChina
- Dermatology ServicesVeterans Affairs Medical Center and University of California San FranciscoSan FranciscoCaliforniaUSA
| | - Joan S. Wakefield
- Dermatology ServicesVeterans Affairs Medical Center and University of California San FranciscoSan FranciscoCaliforniaUSA
| | - Theodora M. Mauro
- Dermatology ServicesVeterans Affairs Medical Center and University of California San FranciscoSan FranciscoCaliforniaUSA
| | - Peter M. Elias
- Dermatology ServicesVeterans Affairs Medical Center and University of California San FranciscoSan FranciscoCaliforniaUSA
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Sonoki Y, Dat Pham Q, Sparr E. Beyond Additivity: A mixture of glucose and NaCl can influence skin hydration more than the individual compounds. J Colloid Interface Sci 2022; 613:554-562. [DOI: 10.1016/j.jcis.2021.12.166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/15/2021] [Accepted: 12/24/2021] [Indexed: 11/16/2022]
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Prangenberg J, Doberentz E, Madea B. Mini Review: Forensic Value of Aquaporines. Front Med (Lausanne) 2022; 8:793140. [PMID: 34977094 PMCID: PMC8718671 DOI: 10.3389/fmed.2021.793140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 11/29/2021] [Indexed: 12/29/2022] Open
Abstract
Forensic pathologists are routinely confronted with unclear causes of death or findings. In some scenarios, it can be difficult to answer the specific questions posed by criminal investigators or prosecutors. Such scenarios may include questions about wound vitality or causes of death when typical or landmark findings are difficult to find. In addition to the usual subsequent examinations to clarify unclear causes of death or special questions, immunohistochemical analysis has become increasingly important since its establishment in the early 40s of the 20th century. Since then, numerous studies have been conducted to determine the usefulness and significance of immunohistochemical investigations on various structures and proteins. These proteins include, for example, aquaporins, which belong to the family of water channels. They enable the transport of water and of small molecules, such as glycerol, through biological channels and so far, 13 classes of aquaporins could have been identified in vertebrates. The classic aquaporin channels 1, 2, 4 and 5 are only permeable to water. The aquaporin channels 3, 7, 9, and 10 are also called aquaglycerolporins since they can also transport glycerol. This mini review discusses the immunohistochemical research on aquaporins, their range of applications, and respective forensic importance, their current limitations, and possible further implementations in the future.
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Affiliation(s)
| | - Elke Doberentz
- Institute of Legal Medicine, University Hospital Bonn, Bonn, Germany
| | - Burkhard Madea
- Institute of Legal Medicine, University Hospital Bonn, Bonn, Germany
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Extraction of natural moisturizing factor from the stratum corneum and its implication on skin molecular mobility. J Colloid Interface Sci 2021; 604:480-491. [PMID: 34273783 DOI: 10.1016/j.jcis.2021.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 12/12/2022]
Abstract
The natural moisturizing factor (NMF) is a mixture of small water-soluble compounds present in the upper layer of the skin, stratum corneum (SC). Soaking of SC in water leads to extraction of the NMF molecules, which may influence the SC molecular properties and lead to brittle and dry skin. In this study, we investigate how the molecular dynamics in SC lipid and protein components are affected by the removal of the NMF compounds. We then explore whether the changes in SC components caused by NMF removal can be reversed by a subsequent addition of one single NMF component: urea, pyrrolidone carboxylic acid (PCA) or potassium lactate. Samples of intact SC were investigated using NMR, X-ray diffraction, infrared spectroscopy and sorption microbalance. It is shown that the removal of NMF leads to reduced molecular mobility in keratin filaments and SC lipids compared to untreated SC. When the complex NMF mixture is replaced by one single NMF component, the molecular mobility in both keratin filaments and lipids is regained. From this we propose a general relation between the molecular mobility in SC and the amount of polar solutes which does not appear specific to the precise chemical identify of the NMF compounds.
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da Silva IV, Silva AG, Pimpão C, Soveral G. Skin aquaporins as druggable targets: Promoting health by addressing the disease. Biochimie 2021; 188:35-44. [PMID: 34097985 DOI: 10.1016/j.biochi.2021.05.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/18/2021] [Accepted: 05/31/2021] [Indexed: 12/17/2022]
Abstract
Skin is the most vulnerable organ of the human body since it is the first line of defense, covering the entire external body surface. Additionally, skin has a critical role in thermoregulation, sensation, immunological surveillance, and biochemical processes such as Vitamin D3 production by ultraviolet irradiation. The ability of the skin layers and resident cells to maintain skin physiology, such as hydration, regulation of keratinocytes proliferation and differentiation and wound healing, is supported by key proteins such as aquaporins (AQPs) that facilitate the movements of water and small neutral solutes across membranes. Various AQP isoforms have been detected in different skin-resident cells where they perform specific roles, and their dysregulation has been associated with several skin pathologies. This review summarizes the current knowledge of AQPs involvement in skin physiology and pathology, highlighting their potential as druggable targets for the treatment of skin disorders.
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Affiliation(s)
- Inês V da Silva
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal; Department of Pharmaceutical Sciences and Medicines, Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal.
| | - Andreia G Silva
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal; Department of Pharmaceutical Sciences and Medicines, Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal
| | - Catarina Pimpão
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal; Department of Pharmaceutical Sciences and Medicines, Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal
| | - Graça Soveral
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal; Department of Pharmaceutical Sciences and Medicines, Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisboa, Portugal.
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Wang X, Lai Q, Zheng B, Ye L, Wen S, Yan Y, Yang B, Man MQ. Both Prevalence and Severity of Pruritus are Associated with Age in Chinese Patients with Skin Diseases. Clin Cosmet Investig Dermatol 2021; 14:217-223. [PMID: 33692631 PMCID: PMC7939505 DOI: 10.2147/ccid.s300458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 02/12/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND Although the characteristics of pruritus in some skin diseases are documented, characteristics of pruritus related to gender-, age-, and skin disorder have not yet been well defined. OBJECTIVE To characterize dermatosis-associated pruritus in Chinese patients. METHODS A cross-sectional study was carried out in a single center. The intensity of pruritus was evaluated using a 0-10 visual analog scale (VAS). Skin disorders were diagnosed by dermatologists. The prevalence and intensity of pruritus were compared among skin disorders, and between males and females. RESULTS Valid questionnaires were obtained from 1,246 female and 864 male patients. Patients with acne, eczematous dermatitis, and urticaria accounted for 18%, 17%, and 14%, respectively. Both the prevalence and severity of pruritus varied greatly with skin disorders (p<0.0001). Patients with either urticaria or eczematous dermatitis displayed a higher prevalence of pruritus (92% and 82%, respectively), while subjects with urticaria exhibited the highest VAS in comparison to those with other skin disorders (p<0.05 to p<0.001 vs the others). Moreover, both the prevalence and severity of pruritus were positively associated with age in both males and females (p<0.0001). Furthermore, 60 out of 77 patients (78%) with topical glucocorticoid-induced dermatitis experienced pruritus, with a VAS of 2.03±0.21. Finally, a lower VAS was found in subjects with oily skin than those with either dry or normal skin. CONCLUSION The prevalence and severity of pruritus vary with skin disorders, skin type, age, and gender in Chinese patients.
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Affiliation(s)
- Xiaohua Wang
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
| | - Qingsong Lai
- Center for Chronic Disease Prevention and Control of Puning City, Puning, Guangdong, 515300, People’s Republic of China
| | - Baoqing Zheng
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
| | - Li Ye
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
| | - Si Wen
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
| | - Yunling Yan
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
| | - Bin Yang
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
| | - Mao-Qiang Man
- Dermatology Hospital, Southern Medical University, Guangdong, 510091, People’s Republic of China
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Allaw M, Pleguezuelos-Villa M, Manca ML, Caddeo C, Aroffu M, Nacher A, Diez-Sales O, Saurí AR, Ferrer EE, Fadda AM, Manconi M. Innovative strategies to treat skin wounds with mangiferin: fabrication of transfersomes modified with glycols and mucin. Nanomedicine (Lond) 2020; 15:1671-1685. [PMID: 32677507 DOI: 10.2217/nnm-2020-0116] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aim: The moisturizing properties of glycerol, the penetration enhancing capability of propylene glycol and the bioadhesive properties of mucin were combined to improve the carrier capabilities of transfersomes and the efficacy of mangiferin in the treatment of skin lesions. Materials & methods: Mangiferin was incorporated in transfersomes and glycoltransfersomes, which were also modified with mucin. The physico-chemical features were assessed, along with the efficacy against oxidative stress and skin wounds in vitro and in vivo. Results: Glycoltransfersomes promoted the deposition of mangiferin in epidermis and dermis, protected fibroblasts from oxidative stress and stimulated their proliferation. The wound healing and anti-inflammatory efficacy of glycoltransfersomes were confirmed in vivo. Conclusion: Results confirmed the potential of glycoltransfersomes in preventing/treating of skin lesions.
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Affiliation(s)
- Mohamad Allaw
- Department of Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, Cagliari, 09124, Italy
| | - Maria Pleguezuelos-Villa
- Department of Pharmacy & Pharmaceutical Technology & Parasitology, University of Valencia, Burjassot, Vicente Andrés Estellés s/n, Valencia, 46100, Spain
| | - Maria Letizia Manca
- Department of Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, Cagliari, 09124, Italy
| | - Carla Caddeo
- Department of Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, Cagliari, 09124, Italy
| | - Matteo Aroffu
- Department of Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, Cagliari, 09124, Italy
| | - Amparo Nacher
- Department of Pharmacy & Pharmaceutical Technology & Parasitology, University of Valencia, Burjassot, Vicente Andrés Estellés s/n, Valencia, 46100, Spain.,Institute of Molecular Recognition & Technological Development, Inter-University Institute from Polytechnic University of Valencia & University of Valencia, Burjassot, 46100, Spain
| | - Octavio Diez-Sales
- Department of Pharmacy & Pharmaceutical Technology & Parasitology, University of Valencia, Burjassot, Vicente Andrés Estellés s/n, Valencia, 46100, Spain.,Institute of Molecular Recognition & Technological Development, Inter-University Institute from Polytechnic University of Valencia & University of Valencia, Burjassot, 46100, Spain
| | - Amparo Ruiz Saurí
- Department of Pathology, University of Valencia, Avda Blasco Ibañez 17, Valencia, 46010, Spain
| | - Elvira Escribano Ferrer
- Biopharmaceutics & Pharmacokinetics Unit, Institute for Nanoscience & Nanotechnology, University of Barcelona, Barcelona, 08193, Spain
| | - Anna Maria Fadda
- Department of Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, Cagliari, 09124, Italy
| | - Maria Manconi
- Department of Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, Cagliari, 09124, Italy
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Zhao C, Wang X, Mao Y, Xu Z, Sun Y, Mei X, Shi W. Variation of biophysical parameters of the skin with age, gender, and lifestyles. J Cosmet Dermatol 2020; 20:249-255. [PMID: 32333703 DOI: 10.1111/jocd.13453] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 04/07/2020] [Accepted: 04/20/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Sweet, spicy or greasy food, staying up late, and using electronic products for a long time are common bad habits nowadays. Their role in skin diseases has been paid much attention. OBJECTIVE The aim of this study was to investigate whether unhealthy lifestyles would affect the skin sebum content, SC hydration, and pH and how do they affect. METHODS A total of 300 volunteers were enrolled, and a multifunctional skin physiology monitor measured the three skin biophysical properties on the forehead and dorsal hand. Lifestyle factors were evaluated by a self-administered questionnaire. RESULTS Eating oily, sweet, spicy food, and staying up late increased the sebum content of the forehead significantly. Dorsal hand SC hydration was higher in people eating more sweet food and oily food, and forehead SC hydration was higher in people eating more sweet food and go to bed earlier. Eating sweet food could increase pH in both forehead and dorsal hand. The forehead pH decreased in using electronic products over 6 hours a day or staying up late. There are significant differences in sebum, hydration, and pH value among different age groups. In males, the pH was lower than females, but the sebum was higher. CONCLUSION Sebum content, SC hydration, and pH are affected by unhealthy lifestyles, age, and gender.
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Affiliation(s)
- Chaoshuai Zhao
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xin Wang
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yaqi Mao
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ziqian Xu
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yue Sun
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xingyu Mei
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weimin Shi
- Department of Dermatology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Aging-associated alterations in epidermal function and their clinical significance. Aging (Albany NY) 2020; 12:5551-5565. [PMID: 32217811 PMCID: PMC7138575 DOI: 10.18632/aging.102946] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/10/2020] [Indexed: 12/11/2022]
Abstract
Chronologically-aged skin displays multiple functional changes in both the dermis and the epidermis. It appears that epidermal dysfunction, compromised permeability homeostasis, reduced stratum corneum hydration and elevated skin surface pH predispose to the development of aging-associated cutaneous and extracutaneous disorders. Improvements in epidermal function have been shown to be an effective alternative therapy in the prevention and treatment of some aging-associated cutaneous disorders, including eczematous dermatitis, pruritus, and xerosis. Recent studies demonstrated that epidermal dysfunction leads to the development of chronic, low-grade systemic inflammation, termed ‘inflammaging,’ which is linked to the development of aging-associated systemic disorders. Thus, correction of epidermal dysfunction could comprise a novel strategy in the prevention and treatment of aging-associated systemic disorders as well. In this review, we summarize aging-associated alterations in epidermal function, their underlying mechanisms, and their clinical significance. Regimens to improve epidermal function in the elderly are also discussed.
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12
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Yang R, Chowdhury S, Choudhary V, Chen X, Bollag WB. Keratinocyte aquaporin-3 expression induced by histone deacetylase inhibitors is mediated in part by peroxisome proliferator-activated receptors (PPARs). Exp Dermatol 2020; 29:380-386. [PMID: 32003033 DOI: 10.1111/exd.14080] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/13/2020] [Accepted: 01/26/2020] [Indexed: 01/10/2023]
Abstract
The water and glycerol channel, aquaporin-3 (AQP3), plays an important role in the skin epidermis, with effects on hydration, permeability barrier repair and wound healing; therefore, information about the mechanisms regulating its expression is important for a complete understanding of skin function physiologically and in disease conditions. We previously demonstrated that histone deacetylase inhibitors (HDACi) induce the mRNA and protein expression of AQP3, in part through the p53 family, transcription factors for which acetylation is known to affect their regulatory activity. Another set of transcription factors previously shown to induce AQP3 expression and/or regulate skin function are the peroxisome proliferator-activated receptors (PPARs). Since there are reports that PPARs are also acetylated, we examined the involvement of these nuclear hormone receptors in HDACi-induced AQP3 expression. We first verified that a PPARγ agonist upregulated AQP3 mRNA and protein levels and that this increase was blocked by a PPARγ antagonist. We then showed that the PPARγ antagonist also inhibited AQP3 expression induced both by a broad-spectrum HDACi and an HDAC3-selective inhibitor. Interestingly, a PPARα antagonist also inhibited HDACi-induced AQP3 expression. These antagonist effects were observed in both primary mouse and normal human keratinocytes. Furthermore, PPARγ overexpression enhanced HDACi-stimulated AQP3 mRNA levels. Thus, our results suggest that PPARγ and/or PPARα may play a role in regulating AQP3 levels in the skin; based on the ability of PPAR agonists to promote epidermal differentiation and/or inhibit proliferation, topical PPAR agonists might be considered as a therapy for hyperproliferative skin disorders, such as psoriasis.
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Affiliation(s)
- Rong Yang
- Department of Physiology, Jianghan University Medical School, Wuhan, China.,Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Shinjini Chowdhury
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Vivek Choudhary
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA.,Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - Xunsheng Chen
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA.,Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - Wendy B Bollag
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA.,Charlie Norwood VA Medical Center, Augusta, GA, USA.,Department of Medicine (Dermatology), Medical College of Georgia at Augusta University, Augusta, GA, USA
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13
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Vyas NS, Shieh WJ, Phelps RG. Investigating the histopathological findings and immunolocalization of rickettsialpox infection in skin biopsies: A case series and review of the literature. J Cutan Pathol 2020; 47:451-458. [PMID: 31955452 DOI: 10.1111/cup.13649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 01/09/2020] [Accepted: 01/12/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Recognition of rickettsialpox infection on skin biopsy can be challenging. The histopathology is non-specific and inconsistently described. We assess classic histopathologic features in confirmed cases and review the literature. METHODS We searched for cases of "rickettsialpox" diagnosed between 2006 and 2018 with positive immunostaining for Spotted Fever Group Rickettsia species. Original slides were evaluated for vacuolar alterations, granulomatous inflammation, vasculitis, necrosis, fibrin thrombi, microvesiculation, papillary dermal edema, and extravasated red blood cells. All biopsies were stained for CD3, CD20, CD68, and myeloperoxidase. RESULTS Six biopsy specimens were compiled, three of which were sampled from vesiculopapules, one from a maculopapule, and two from eschars. Vacuolar alterations and vasculitis were present in all specimens (6/6; 100%). Granulomatous inflammation was present in five specimens (5/6; 83.3%). Fibrin thrombi and red blood cells were seen in 3/6 (50%) of specimens. The eschars showed necrosis of the epidermis and superficial dermis (2/6, 33.3%). Only one specimen showed intraepidermal vesiculation and papillary dermal edema (1/6; 16.7%). All six specimens showed perivascular infiltration with CD3+ T-cells, and low amounts of CD20+ B-cells and neutrophils. Five of the six specimens (83.3%) showed significant levels of CD68+ histiocytes. CONCLUSION The histopathology of rickettsialpox infection is septic lymphocytic and granulomatous vasculitis.
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Affiliation(s)
- Nikki S Vyas
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Wun-Ju Shieh
- Infectious Diseases Pathology Branch, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Robert G Phelps
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, New York.,Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York
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14
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Railanmaa A, Lehtimäki S, Keskinen J, Lupo D. Non-toxic printed supercapacitors operating in sub-zero conditions. Sci Rep 2019; 9:14059. [PMID: 31575914 PMCID: PMC6773738 DOI: 10.1038/s41598-019-50570-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 09/16/2019] [Indexed: 11/25/2022] Open
Abstract
Aqueous supercapacitors offer a safe alternative for intermediate energy storage in energy harvesting applications, but their performance is limited to relatively warm temperatures. We report the performance of glycerol as a non-toxic anti-freeze for a water-based electrolyte from room temperature to −30 °C at various concentrations. The supercapacitors are manufactured with graphite and activated carbon as current collector and electrode on a flexible polyester (PET) substrate by stencil printing, with a sodium chloride solution as the electrolyte. The devices are characterized at various constant temperatures for electrical performance, as well as in room temperature for mass loss and development of performance over time. It is shown that supercapacitors with glycerol function well in the decreased temperatures compared to water: the capacitance experiences only a slight decrease and the leakage current is significantly reduced. The equivalent series resistance is affected the most by the reduced temperatures, and should be considered the primary limiting factor in low-temperature applications. Electrolytes with 30–40% glycerol perform the best in commercial freezer temperatures, but below −20 °C a higher concentration of 45% glycerol retains better function. The results show great promise for a non-toxic alternative for improving the temperature range of printed supercapacitors.
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Affiliation(s)
- Anna Railanmaa
- Tampere University, Information Technology and Communication Sciences, Korkeakoulunkatu 3, FI-33720, Tampere, Finland.
| | - Suvi Lehtimäki
- Tampere University, Information Technology and Communication Sciences, Korkeakoulunkatu 3, FI-33720, Tampere, Finland
| | - Jari Keskinen
- Tampere University, Information Technology and Communication Sciences, Korkeakoulunkatu 3, FI-33720, Tampere, Finland
| | - Donald Lupo
- Tampere University, Information Technology and Communication Sciences, Korkeakoulunkatu 3, FI-33720, Tampere, Finland
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15
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Espinoza LC, Silva-Abreu M, Calpena AC, Rodríguez-Lagunas MJ, Fábrega MJ, Garduño-Ramírez ML, Clares B. Nanoemulsion strategy of pioglitazone for the treatment of skin inflammatory diseases. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2019; 19:115-125. [PMID: 31004811 DOI: 10.1016/j.nano.2019.03.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 02/17/2019] [Accepted: 03/25/2019] [Indexed: 12/11/2022]
Abstract
Pioglitazone (PGZ) is a peroxisome proliferator-activated receptor agonist. Its role in the inflammatory response modulation paves the way for additional therapeutic applications. The purpose of this study was to develop a pioglitazone nanoemulsion (PGZ-NE) in order to investigate its anti-inflammatory efficacy on the skin. To that end, an NE vehicle developed for skin delivery was optimized and characterized. The resulting PGZ-NE showed good anti-inflammatory efficacy by decreasing the expression of inflammatory cytokines IL-6, IL-1β and TNF-α. The properties of the developed nanocarrier allowed achievement of a high permeation flux of PGZ through the skin as well as a high retained amount in the skin, likely due to the depot effect of ingredients, which assured a prolonged local action, with good skin tolerability among participating individuals. Consequently, these results suggest that PGZ-NE may be used as an alternative treatment for inflammatory skin diseases such as rosacea, atopic dermatitis or psoriasis.
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Affiliation(s)
- Lupe C Espinoza
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain; Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, Loja, Ecuador
| | - Marcelle Silva-Abreu
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain; Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
| | - Ana C Calpena
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain; Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
| | - María J Rodríguez-Lagunas
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
| | - María-José Fábrega
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain; Institute of Biomedicine, University of Barcelona, Barcelona, Spain
| | - María L Garduño-Ramírez
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico
| | - Beatriz Clares
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain; Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, Granada, Spain.
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16
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Páyer E, Szabó-Papp J, Ambrus L, Szöllősi AG, Andrási M, Dikstein S, Kemény L, Juhász I, Szegedi A, Bíró T, Oláh A. Beyond the physico-chemical barrier: Glycerol and xylitol markedly yet differentially alter gene expression profiles and modify signalling pathways in human epidermal keratinocytes. Exp Dermatol 2019. [PMID: 29520873 DOI: 10.1111/exd.13493] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Polyols (e.g. glycerol, xylitol) are implicated as moisturizers of the skin and other epithelial tissues. However, we lack information about their exact cellular mechanisms and their effects on the gene expression profiles. Therefore, in this study, we aimed at investigating the effects of glycerol and xylitol on human epidermal keratinocytes. The polyols (identical osmolarities; xylitol: 0.0045%-0.45%; glycerol: 0.0027%-0.27%) did not alter cellular viability or intracellular calcium concentration. However, they exerted differential effects on the expression of certain genes and signalling pathways. Indeed, both polyols up-regulated the expression of filaggrin, loricrin, involucrin and occludin; yet, xylitol exerted somewhat more profound effects. Moreover, while both polyols stimulated the MAPK pathway, only xylitol induced the activation-dependent translocation of protein kinase Cδ, a key promoter of epidermal differentiation. Finally, in various keratinocyte inflammation models, both polyols (albeit with different efficacies) exerted anti-inflammatory effects. Taken together, these data strongly suggest that glycerol and xylitol differentially modulate expressions of multiple genes and activities of signalling pathways in epidermal keratinocytes. Thus, our findings invite clinical trials to explore the applicability and the impact of a combined glycerol-xylitol therapy in the management of various skin conditions.
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Affiliation(s)
- Edit Páyer
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Judit Szabó-Papp
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Lídia Ambrus
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Attila Gábor Szöllősi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Mónika Andrási
- Department of Surgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | | | - Lajos Kemény
- MTA-SZTE Dermatological Research Group, Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - István Juhász
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Andrea Szegedi
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tamás Bíró
- Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Attila Oláh
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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17
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Kasting GB, Miller MA, LaCount TD, Jaworska J. A Composite Model for the Transport of Hydrophilic and Lipophilic Compounds Across the Skin: Steady-State Behavior. J Pharm Sci 2019; 108:337-349. [DOI: 10.1016/j.xphs.2018.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 08/17/2018] [Accepted: 09/06/2018] [Indexed: 02/06/2023]
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18
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Huang LN, Zhong YP, Liu D, Wang XH, Gong CY, Wen S, Elias PM, Yang B, Man MQ. Adverse cutaneous reactions to skin care products on the face vary with age, but not with sex. Contact Dermatitis 2018; 79:365-369. [PMID: 30206954 PMCID: PMC6234074 DOI: 10.1111/cod.13102] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/20/2018] [Accepted: 07/22/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Adverse skin reactions to skin care products have been increasing in recent years. However, to date, these reactions have not been well characterized. OBJECTIVE To describe the symptoms, clinical signs and frequency of adverse cutaneous reactions to skin care products on the face in males vs females of various ages. PATIENTS AND METHODS All outpatients diagnosed with adverse cutaneous reactions to skin care products on the face examined by dermatologists at the Dermatology Hospital of South Medical University between November 1, 2016 and October 31, 2017, employing a questionnaire and an interview, were eligible. The associations of adverse cutaneous reactions with age and sex were analysed. RESULTS A total of 433 outpatients, accounting for 0.12% of all outpatients, were assessed. Of these, 223 patients, including 204 females and 19 males, aged 4 to 75 years, were eventually diagnosed with adverse reactions to skin care products on the face. Eighty-two per cent of patients experienced pruritus, 80% showed erythema, and 48% showed visible swelling. The incidence rates of both xerosis and oedema correlated positively with age, whereas acne-like lesions were negatively associated with age, but not with sex. CONCLUSIONS Our results indicate that pruritus, xerosis and erythema are common adverse cutaneous reactions to facial skin care products. These reactions vary with age, but not with sex. Vigorous safety testing should precede the marketing of skin care products.
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Affiliation(s)
- Li-ning Huang
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Yi-ping Zhong
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Dan Liu
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Xiao-hua Wang
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Can-yi Gong
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Si Wen
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Peter M. Elias
- Dermatology Services, Veterans Affairs Medical Center and University of California San Francisco, California
| | - Bin Yang
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
| | - Mao-Qiang Man
- Dermatology Hospital, Southern Medical University, Guangdong, P.R. China
- Dermatology Services, Veterans Affairs Medical Center and University of California San Francisco, California
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19
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20
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Pham QD, Wolde-Kidan A, Gupta A, Schlaich A, Schneck E, Netz RR, Sparr E. Effects of Urea and TMAO on Lipid Self-Assembly under Osmotic Stress Conditions. J Phys Chem B 2018; 122:6471-6482. [DOI: 10.1021/acs.jpcb.8b02159] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Quoc Dat Pham
- Division of Physical Chemistry, Chemistry Department, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Amanuel Wolde-Kidan
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Anirudh Gupta
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Alexander Schlaich
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Emanuel Schneck
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Roland R. Netz
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Emma Sparr
- Division of Physical Chemistry, Chemistry Department, Lund University, P.O. Box 124, 22100 Lund, Sweden
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21
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Human axillary skin condition is improved following incorporation of glycerol into the stratum corneum from an antiperspirant formulation. Arch Dermatol Res 2017; 309:739-748. [PMID: 28889318 DOI: 10.1007/s00403-017-1771-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 07/31/2017] [Accepted: 08/22/2017] [Indexed: 01/26/2023]
Abstract
The study objectives were to demonstrate that glycerol, when topically applied from a roll-on antiperspirant formulation, can be delivered directly to human skin ex vivo and the axillary stratum corneum (SC) in vivo, and to assess whether it improves the quality of the axillary skin barrier. Ex vivo human skin absorption of glycerol was measured following application of a roll-on antiperspirant formulation containing 4% 13C3-glycerol. Skin distribution of 13C3-glycerol over 24 h was assessed using gas chromatography-mass spectrometry. In vivo axillary SC penetration was measured by confocal Raman spectroscopy and multivariate curve-resolution software 1 h after topical application of a roll-on antiperspirant formulation containing 8% deuterated glycerol (d5-glycerol). A clinical study was conducted to determine the efficacy of a roll-on antiperspirant formulation containing 4% glycerol in reducing shaving-induced visual irritation and in increasing axillary-skin hydration. Ex vivo skin absorption studies indicated that the formulation delivered 13C3-glycerol into the SC at all timepoints over the 24-h period. In vivo Raman measurements (1 h after application) demonstrated that d5-glycerol was detectable to a depth of at least 10 μm in the axillary SC. Application of 4% glycerol from a roll-on antiperspirant formulation to the axilla was associated with significantly less visible irritation and greater skin hydration than observed with the control (glycerol-free) product. These studies demonstrate that glycerol, incorporated in a roll-on antiperspirant formulation, is delivered directly and rapidly to all depths of the axillary SC, and results in improvements in visible irritation and hydration in the axilla.
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22
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Is Aquaporin-3 a Determinant Factor of Intrinsic and Extrinsic Aging? An Immunohistochemical and Morphometric Study. Appl Immunohistochem Mol Morphol 2017; 25:49-57. [PMID: 26509906 DOI: 10.1097/pai.0000000000000265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Aquaporin-3 (AQP3) is an aquaglyceroporin that plays a role in skin hydration, cell proliferation, and migration. The aim of this work was to investigate the expression of AQP3 in sun-exposed and sun-protected human skin from different age groups to understand the relationship between AQP3 and skin aging. Using standard immunohistochemical techniques, sun-exposed and sun-protected skin biopsies were taken from 60 normal individuals. AQP3 was expressed in the basal and the suprabasal layers, sparing the stratum corneum, in all specimens. Dermal expression was detected in fibroblasts, endothelial cells, and adnexa. Sun-protected skin showed a significantly higher epidermal H-score and percentage of expression (P=0.002 and <0.001, respectively) compared with sun-exposed skin. The AQP3 expression intensity showed a gradual decrease from the 20 to 35-year-old group to the 35 to 50-year-old group, with the least immunoreactivity in the above 50-year-old group. A significant difference was detected in the H-score in favor of the 20 to 35-year-old group in sun-exposed and sun-protected skin (P<0.001 for both). A significant negative correlation was noted between the AQP3 expression percentage and the age in sun-exposed (r=-0.64, P<0.001) and sun-protected skin (r=-0.53, P<0.001). In conclusion, the skin dryness observed in intrinsic and extrinsic aged skin may be explained, at least in part, by AQP3 downregulation. This may open new avenues sufficient to control skin texture and beauty. Its interaction in skin protein organization and gene polymorphism can also be tackled in future research. In addition, clinical trials using AQP3 topical applications should be carried out to evaluate its effectiveness in the reversal of age-related skin changes.
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23
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Jung YR, Lee JH, Sohn KC, Lee Y, Seo YJ, Kim CD, Lee JH, Hong SP, Seo SJ, Kim SJ, Im M. Adiponectin Signaling Regulates Lipid Production in Human Sebocytes. PLoS One 2017; 12:e0169824. [PMID: 28081218 PMCID: PMC5230785 DOI: 10.1371/journal.pone.0169824] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 12/22/2016] [Indexed: 12/22/2022] Open
Abstract
Adiponectin plays important roles in metabolic function, inflammation and multiple biological activities in various tissues. However, evidence for adiponectin signaling in sebaceous glands is lacking, and its role remains to be clarified. This study investigated the role of adiponectin in lipid production in sebaceous glands in an experimental study of human sebocytes. We demonstrated that human sebaceous glands in vivo and sebocytes in vitro express adiponectin receptor and that adiponectin increased cell proliferation. Moreover, based on a lipogenesis study using Oil Red O, Nile red staining and thin layer chromatography, adiponectin strongly upregulated lipid production in sebocytes. In three-dimensional culture of sebocytes, lipid synthesis was markedly enhanced in sebocytes treated with adiponectin. This study suggested that adiponectin plays a significant role in human sebaceous gland biology. Adiponectin signaling is a promising target in the clinical management of barrier disorders in which sebum production is decreased, such as in atopic dermatitis and aged skin.
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Affiliation(s)
- Yu Ra Jung
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Jin-Hyup Lee
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Kyung-Cheol Sohn
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Young Lee
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Young-Joon Seo
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Chang-Deok Kim
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Jeung-Hoon Lee
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Seung-Phil Hong
- Department of Dermatology, College of Medicine, Dankook University, Cheonan, Korea
| | - Seong-Jun Seo
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Seong-Jin Kim
- Department of Dermatology, Chonnam National University Medical School, Gwangju, Korea
| | - Myung Im
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea
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24
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Aquaporins in the Skin. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 969:173-191. [DOI: 10.1007/978-94-024-1057-0_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Libio IC, Demori R, Ferrão MF, Lionzo MI, da Silveira NP. Films based on neutralized chitosan citrate as innovative composition for cosmetic application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:115-124. [DOI: 10.1016/j.msec.2016.05.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/23/2016] [Accepted: 05/02/2016] [Indexed: 11/29/2022]
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26
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Heavy Cigarette Smokers in a Chinese Population Display a Compromised Permeability Barrier. BIOMED RESEARCH INTERNATIONAL 2016; 2016:9704598. [PMID: 27437403 PMCID: PMC4942621 DOI: 10.1155/2016/9704598] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 06/06/2016] [Indexed: 01/26/2023]
Abstract
Cigarette smoking is associated with various cutaneous disorders with defective permeability. Yet, whether cigarette smoking influences epidermal permeability barrier function is largely unknown. Here, we measured skin biophysical properties, including permeability barrier homeostasis, stratum corneum (SC) integrity, SC hydration, skin surface pH, and skin melanin/erythema index, in cigarette smokers. A total of 99 male volunteers were enrolled in this study. Smokers were categorized as light-to-moderate (<20 cigarettes/day) or heavy smokers (≥20 cigarettes/day). An MPA5 was used to measure SC hydration and skin melanin/erythema index on the dorsal hand, forehead, and cheek. Basal transepidermal water loss (TEWL) and barrier recovery rates were assessed on the forearm. A Skin-pH-Meter pH900 was used to measure skin surface pH. Our results showed that heavy cigarette smokers exhibited delayed barrier recovery after acute abrogation (1.02% ± 13.06 versus 16.48% ± 6.07), and barrier recovery rates correlated negatively with the number of daily cigarettes consumption (p = 0.0087). Changes in biophysical parameters in cigarette smokers varied with body sites. In conclusion, heavy cigarette smokers display compromised permeability barrier homeostasis, which could contribute, in part, to the increased prevalence of certain cutaneous disorders characterized by defective permeability. Thus, improving epidermal permeability barrier should be considered for heavy cigarette smokers.
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27
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Soler DC, Bai X, Ortega L, Pethukova T, Nedorost ST, Popkin DL, Cooper KD, McCormick TS. The key role of aquaporin 3 and aquaporin 10 in the pathogenesis of pompholyx. Med Hypotheses 2015; 84:498-503. [PMID: 25725905 DOI: 10.1016/j.mehy.2015.02.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 01/26/2015] [Accepted: 02/05/2015] [Indexed: 12/31/2022]
Abstract
Pompholyx remains a chronic skin affliction without a compelling pathophysiological explanation. The disease is characterized by the sudden onset of vesicles exclusively in the palms and soles which generally resolves. However, the disease may progress and the vesicles may expand and fuse; with chronicity there is deep fissuring. Multiple therapeutic approaches are available, but the disease is often resistant to conventional treatments. Currently, oral alitretinoin is used for patients with resistant chronic disease; however, this therapy is only approved for use in the UK, Europe and Canada. In this paper we wish to put forward a hypothesis: exposure to water and the subsequent steep osmotic gradient imbalance are key factors driving skin dehydration seen in pompholyx patients once the disease becomes chronic. The mechanistic explanation for the epidermal fissuring might lie in the over-expression across the mid and upper epidermis, including the stratum corneum, of two water/glycerol channel proteins aquaporin 3 and aquaporin 10, expressed in the keratinocytes of afflicted pompholyx patients. The over-expression of these two aquaporins may bridge the abundantly hydrated dermis and basal epidermis to the outer environment allowing cutaneous water and glycerol to flow outward. The beneficial effects reported in alitretinoin-treated patients with chronic hand eczemas may be due potential regulation of aquaporin 3 and aquaporin 10 by alitretinoin.
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Affiliation(s)
- D C Soler
- Department of Dermatology, Case Western Reserve University, USA; The Murdough Family Center for Psoriasis, Cleveland, OH 44106, USA
| | - X Bai
- Center for RNA Molecular Biology, Case Western Reserve University, USA
| | - L Ortega
- School of Medicine, Case Western Reserve University, USA
| | - T Pethukova
- School of Medicine, Case Western Reserve University, USA
| | - S T Nedorost
- University Hospitals Case Medical Center and VA Medical Center, Cleveland, OH 44106, USA
| | - D L Popkin
- Department of Dermatology, Case Western Reserve University, USA; The Murdough Family Center for Psoriasis, Cleveland, OH 44106, USA; University Hospitals Case Medical Center and VA Medical Center, Cleveland, OH 44106, USA
| | - K D Cooper
- Department of Dermatology, Case Western Reserve University, USA; The Murdough Family Center for Psoriasis, Cleveland, OH 44106, USA; University Hospitals Case Medical Center and VA Medical Center, Cleveland, OH 44106, USA
| | - T S McCormick
- Department of Dermatology, Case Western Reserve University, USA; The Murdough Family Center for Psoriasis, Cleveland, OH 44106, USA.
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Björklund S, Andersson JM, Pham QD, Nowacka A, Topgaard D, Sparr E. Stratum corneum molecular mobility in the presence of natural moisturizers. SOFT MATTER 2014; 10:4535-46. [PMID: 24817485 DOI: 10.1039/c4sm00137k] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The outermost layer of the skin, the stratum corneum (SC), is a lipid-protein membrane that experiences considerable osmotic stress from a dry and cold climate. The natural moisturizing factor (NMF) comprises small and polar substances, which like osmolytes can protect living systems from osmotic stress. NMF is commonly claimed to increase the water content in the SC and thereby protect the skin from dryness. In this work we challenge this proposed mechanism, and explore the influence of NMF on the lipid and protein components in the SC. We employ natural-abundance (13)C solid-state NMR methods to investigate how the SC molecular components are influenced by urea, glycerol, pyrrolidone carboxylic acid (PCA), and urocanic acid (UCA), all of which are naturally present in the SC as NMF compounds. Experiments are performed with intact SC, isolated corneocytes and model lipids. The combination of NMR experiments provides molecularly resolved qualitative information on the dynamics of different SC lipid and protein components. We obtain completely novel molecular information on the interaction of these NMF compounds with the SC lipids and proteins. We show that urea and glycerol, which are also common ingredients in skin care products, increase the molecular mobility of both SC lipids and proteins at moderate relative humidity where the SC components are considerably more rigid in the absence of these compounds. This effect cannot be attributed to increased SC water content. PCA has no detectable effect on SC molecular mobility under the conditions investigated. It is finally shown that the more apolar compound, UCA, specifically influences the mobility of the SC lipid regions. The present results show that the NMF components act to retain the fluidity of the SC molecular components under dehydrating conditions in such a way that the SC properties remain largely unchanged as compared to more hydrated SC. These findings provide a new molecular insight into how small polar molecules in NMF and skin care products act to protect the human skin from drying.
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Affiliation(s)
- Sebastian Björklund
- Division of Physical Chemistry, The Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
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Paradoxical benefits of psychological stress in inflammatory dermatoses models are glucocorticoid mediated. J Invest Dermatol 2014; 134:2890-2897. [PMID: 24991965 PMCID: PMC4227540 DOI: 10.1038/jid.2014.265] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 03/20/2014] [Accepted: 04/28/2014] [Indexed: 01/21/2023]
Abstract
Acute psychological stress (PS) mobilizes metabolic responses that are of immediate benefit to the host, but the current medical paradigm holds that PS exacerbates systemic and cutaneous inflammatory disorders. Although the adverse consequences of PS are usually attributed to neuroimmune mechanisms, PS also stimulates an increase in endogenous glucocorticoids (GCs) that compromises permeability barrier homeostasis, stratum corneum cohesion, wound healing, and epidermal innate immunity in normal skin. Yet, if such PS-induced increases in GC were uniformly harmful, natural selection should have eliminated this component of the stress response. Hence, we hypothesized here instead that stress-induced elevations in endogenous GC could benefit, rather than aggravate, cutaneous function and reduce inflammation in three immunologically diverse mouse models of inflammatory diseases. Indeed, superimposed exogenous (motion-restricted) stress reduced, rather than aggravated inflammation and improved epidermal function in all three models, even normalizing serum IgE levels in the atopic dermatitis model. Elevations in endogenous GC accounted for these apparent benefits, because coadministration of mifepristone prevented stress-induced disease amelioration. Thus, exogenous stress can benefit rather than aggravate cutaneous inflammatory dermatoses through the anti-inflammatory activity of increased endogenous GC.
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Kim J, Kim YS, Cho Y. WITHDRAWN: Lithospermum erythrorhizon extract improves the hydration, sebum, and ceramide content of healthy skin: results from a randomized, placebo-controlled, double-blind study. Nutr Res 2014. [DOI: 10.1016/j.nutres.2014.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Matsunaga N, Itcho K, Hamamura K, Ikeda E, Ikeyama H, Furuichi Y, Watanabe M, Koyanagi S, Ohdo S. 24-hour rhythm of aquaporin-3 function in the epidermis is regulated by molecular clocks. J Invest Dermatol 2014; 134:1636-1644. [PMID: 24418925 DOI: 10.1038/jid.2014.13] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 12/02/2013] [Accepted: 12/16/2013] [Indexed: 01/01/2023]
Abstract
Aquaporin 3 (AQP3) is located in the basal layer of the epidermis and regulates biological functions of skin such as water content and trans-epidermal water loss. A recent study showed that the biological function of skin exhibits a 24-hour rhythm, but the molecular mechanism of the variation remains poorly understood. Here we show that mice mutated in the core clock component CLOCK (Clk/Clk) show decreased stratum corneum hydration. An extensive search for the underlying cause led us to identify AQP3 as a new regulator to control the 24-hour variation in biological functions of skin. In mouse epidermis of wild-type mice, mAqp3 exhibits circadian rhythms; however, these are significantly decreased in Clk/Clk. Luciferase reporter gene analysis revealed that transcription of mAqp3 is activated by D-site-binding protein, a clock gene. A human homolog, hAQP3, also exhibited significant oscillation in human keratinocyte (HaCaT) cells synchronized with medium containing 50% serum, and this rhythm was regulated by the endogenous CLOCK/BMAL1 heterodimer. These data indicate that although the molecular mechanisms underlying the rhythmic expression of mAqp3 and hAQP3 are different, clock genes are involved in time-dependent skin hydration. Our current findings provide a molecular link between the circadian clock and AQP3 function in mouse dorsal skin and HaCaT cells.
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Affiliation(s)
- Naoya Matsunaga
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Kazufumi Itcho
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Kengo Hamamura
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan; Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan
| | - Eriko Ikeda
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Hisako Ikeyama
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Yoko Furuichi
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Miyako Watanabe
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoru Koyanagi
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Shigehiro Ohdo
- Faculty of Pharmaceutical Sciences, Division of Clinical Pharmacy, Department of Pharmaceutics, Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
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Feingold KR, Elias PM. Role of lipids in the formation and maintenance of the cutaneous permeability barrier. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1841:280-94. [PMID: 24262790 DOI: 10.1016/j.bbalip.2013.11.007] [Citation(s) in RCA: 245] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 11/01/2013] [Accepted: 11/10/2013] [Indexed: 12/18/2022]
Abstract
The major function of the skin is to form a barrier between the internal milieu and the hostile external environment. A permeability barrier that prevents the loss of water and electrolytes is essential for life on land. The permeability barrier is mediated primarily by lipid enriched lamellar membranes that are localized to the extracellular spaces of the stratum corneum. These lipid enriched membranes have a unique structure and contain approximately 50% ceramides, 25% cholesterol, and 15% free fatty acids with very little phospholipid. Lamellar bodies, which are formed during the differentiation of keratinocytes, play a key role in delivering the lipids from the stratum granulosum cells into the extracellular spaces of the stratum corneum. Lamellar bodies contain predominantly glucosylceramides, phospholipids, and cholesterol and following the exocytosis of lamellar lipids into the extracellular space of the stratum corneum these precursor lipids are converted by beta glucocerebrosidase and phospholipases into the ceramides and fatty acids, which comprise the lamellar membranes. The lipids required for lamellar body formation are derived from de novo synthesis by keratinocytes and from extra-cutaneous sources. The lipid synthetic pathways and the regulation of these pathways are described in this review. In addition, the pathways for the uptake of extra-cutaneous lipids into keratinocytes are discussed. This article is part of a Special Issue entitled The Important Role of Lipids in the Epidermis and their Role in the Formation and Maintenance of the Cutaneous Barrier. Guest Editors: Kenneth R. Feingold and Peter Elias.
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Affiliation(s)
- Kenneth R Feingold
- Metabolism Section, Medicine Service and Dermatology Service, Department of Veterans Affairs Medical Center, University of California San Francisco, San Francisco, CA 94121, USA.
| | - Peter M Elias
- Metabolism Section, Medicine Service and Dermatology Service, Department of Veterans Affairs Medical Center, University of California San Francisco, San Francisco, CA 94121, USA
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Björklund S, Engblom J, Thuresson K, Sparr E. Glycerol and urea can be used to increase skin permeability in reduced hydration conditions. Eur J Pharm Sci 2013; 50:638-45. [PMID: 23643739 DOI: 10.1016/j.ejps.2013.04.022] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 04/22/2013] [Accepted: 04/23/2013] [Indexed: 11/28/2022]
Abstract
The natural moisturizing factor (NMF) is a group of hygroscopic molecules that is naturally present in skin and protects from severe drying. Glycerol and urea are two examples of NMF components that are also used in skin care applications. In the present study, we investigate the influence of glycerol and urea on the permeability of a model drug (metronidazole, Mz) across excised pig skin membranes at different hydrating conditions. The degree of skin hydration is regulated by the gradient in water activity across the membrane, which in turn depends on the water activity of the formulation in contact with the skin membrane. Here, we determine the water activity of all formulations employed using an isothermal calorimetric method. Thus, the gradient in water activity is controlled by a novel experimental set-up with well-defined boundary conditions on both sides of the skin membrane. The results demonstrate that glycerol and urea can retain high steady state flux of Mz across skin membranes at dehydrating conditions, which otherwise would decrease the permeability due to dehydration. X-ray diffraction measurements are performed to give insight into the effects of glycerol and urea on SC molecular organization. The novel steady state flux results can be related to the observation that water, glycerol, and urea all affect the structural features of the SC molecular components in a similar manner.
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Affiliation(s)
- Sebastian Björklund
- Physical Chemistry, The Center for Chemistry and Chemical Engineering, Lund University, Box 124, SE-221 00 Lund, Sweden; Biomedical Laboratory Science and Technology, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden.
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Jeong CB, Han JY, Cho JC, Suh KD, Nam GW. Analysis of electrical property changes of skin by oil-in-water emulsion components. Int J Cosmet Sci 2013; 35:402-10. [PMID: 23621673 PMCID: PMC3807609 DOI: 10.1111/ics.12059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 04/20/2013] [Indexed: 11/28/2022]
Abstract
ObjectivesAs the ‘Dry Skin Cycle’ produces continuous deterioration, cosmetic xerosis (flaky, dry skin) is one of the major concerns to most consumers. The purpose of this study was to investigate the moisturizing effect of oil-in-water (O/W) emulsion components. There are numerous types of oils, waxes, polyols and surfactants used as ingredients in skincare products. However, the moisturizing effect of each ingredient and understanding each use to make an effective moisturizing products are still not well understood. Methods To provide answers to these questions, we investigated the moisturizing effect of widely used 41 components (four different classes) in a simple O/W emulsion using capacitance methods. 106 different single oils, and combinations of oil with oil, wax, humectants, and surfactant were formulated and tested. Results In this study, we found that most of the O/W emulsion components had hydration effects on the skin. (i) The average relative water content increase (RWCI) rate of a single oil-based emulsion was 11.8 ± 5.2% (SE) and 7.9 ± 6.0% (SE) at 3 and 6 h, respectively. (ii) An oil combination emulsion showed an average RWCI rate similar to that of a single oil-based emulsion, 12.6 ± 6.0% (SE) and 12.1 ± 6.4% (SE) at 3 and 6 h, respectively (iii) A combination of waxes with oil showed an average RWCI rate of 16 ± 5.6% (SE) and 12.4 ± 4.5% (SE) at 3 and 6 h, respectively. (iv) Humectant combinations showed the highest average RWCI rate 28 ± 7.3% (SE) and 22.2 ± 7.5% (SE) at 3 and 6 h, respectively (v) Surfactant combinations had an average RWCI of 10.8 ± 4.5% (SE) and 6.0 ± 4.0% (SE) at 3 and 6 h, respectively. Conclusion Interestingly, it was difficult to find moisturizing power differences among samples in the same group. Only the humectants group showed significant differences among samples. Glycerine and urea showed significant skin hydration effects compared with other humectants. We also found a significant moisturizing effect by analysing the chemical functional groups; amide class had a higher hydration effect than betaines and disaccharides in humectants combination. Résumé Objectif Puisque le «cycle de la peau sèche” produit une détérioration continue, la xérose cosmétique (squameuse, peau sèche) est l’une des préoccupations majeures pour la plupart des consommateurs. Le but de cette étude était d’étudier l’effet hydratant des composants d’émulsions H / E. Il existe de nombreux types d’huiles, des cires, de polyols, et des tensioactifs utilisés comme ingrédients dans les produits de soins de la peau. Cependant, l’effet hydratant de chaque ingrédient et de leur utilisation dans des produits hydratants efficaces ne sont pas encore bien compris. MethodesPour apporter des réponses à ces questions, nous avons étudié l’effet hydratant des 41 éléments (4 classes différentes) largement utilisés dans une émulsion simple O/W en utilisant des méthodes de capacitance. 106 huiles individuelles différentes et des combinaisons d’huile avec de l’huile, de la cire, des humectants, et de tensioactifs ont été formulées et testées. ResultatsDans cette étude, nous avons constaté que la plupart des composants des émulsions huile-dans-eau (H/E) possédaient des effets d’hydratation de la peau. (i) Le taux moyen d’augmentation d’eau (RWCI = relative water content increase) d’une émulsion à base d’une seule huile était de 11,8 ± 5,2% (SE) et de 7,9 ± 6,0% (SE) à 3 et 6 h, respectivement. (ii) Une émulsion de combinaison d’huile montrait une RWCI similaire à celle d’une émulsion à base d’huile unique, 12,6 ± 6,0% (SE) et 12,1 ± 6,4% (SE) à 3 et 6 h, respectivement. (iii) Une combinaison des cires avec de l’huile présentait une RWCI de 16 ± 5,6% (SE) et 12,4 ± 4,5% (SE) à 3 et 6 h, respectivement. (iv) Les combinaisons d’humectant ont montré la plus forte augmentation avec +28 ± 7,3% (SE) et 22,2 ± 7,5% (SE) à 3 et 6 h, respectivement. (v) Les combinaisons de tensioactifs ont une RWCI moyenne de 10,8 ± 4,5% (SE) et de 6,0 ± 4,0% (SE) à 3 et 6 h, respectivement. ConclusionFait intéressant, il était difficile de trouver des différences de pouvoir d’hydratation entre les échantillons dans le même groupe. Seul le groupe des humectants a montré des différences significatives entre les échantillons. La glycérine et l’urée ont montré des effets significatifs sur l’hydratation de la peau par rapport aux autres humectants. Nous avons également constaté un effet hydratant important en analysant les groupes fonctionnels chimiques; la classe “amide” a eu un effet d’hydratation plus élevé que les bétaînes et disaccharides dans les combinaisons des humectants.
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Affiliation(s)
- C B Jeong
- Amorepacific R&D Center, Skin Research Institute, 314-1, Bora-dong, Yongin-si 446-729, Korea
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Evans RL, Marriott RE, Harker M. Axillary skin: biology and care. Int J Cosmet Sci 2012; 34:389-95. [DOI: 10.1111/j.1468-2494.2012.00729.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 05/14/2012] [Indexed: 01/06/2023]
Affiliation(s)
- R. L. Evans
- Port Sunlight Laboratory; Unilever Research and Development; Quarry Road East; Bebington; Wirral; CH63 3JW; U.K
| | - R. E. Marriott
- Port Sunlight Laboratory; Unilever Research and Development; Quarry Road East; Bebington; Wirral; CH63 3JW; U.K
| | - M. Harker
- Port Sunlight Laboratory; Unilever Research and Development; Quarry Road East; Bebington; Wirral; CH63 3JW; U.K
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Sakuma TH, Maibach HI. Oily skin: an overview. Skin Pharmacol Physiol 2012; 25:227-35. [PMID: 22722766 DOI: 10.1159/000338978] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Accepted: 04/20/2012] [Indexed: 01/19/2023]
Abstract
Oily skin (seborrhea) is a common cosmetic problem that occurs when oversized sebaceous glands produce excessive amounts of sebum giving the appearance of shiny and greasy skin. This paper overviews the main concepts of sebaceous gland anatomy and physiology, including the biosynthesis, storage and release of sebum, as well as its relationship to skin hydration and water barrier function. We also address how skin oiliness may vary according to diet, age, gender, ethnicity and hot humid climates. The deeper understanding of this skin type provides the opportunity to better guide patients regarding skin care and also assist in the development of sebosuppressive agents.
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Sugawara T, Kikuchi K, Tagami H, Aiba S, Sakai S. Decreased lactate and potassium levels in natural moisturizing factor from the stratum corneum of mild atopic dermatitis patients are involved with the reduced hydration state. J Dermatol Sci 2012; 66:154-9. [PMID: 22464763 DOI: 10.1016/j.jdermsci.2012.02.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 02/22/2012] [Accepted: 02/23/2012] [Indexed: 12/30/2022]
Abstract
BACKGROUND Atopic dermatitis (AD) shows dry skin. Water-soluble, low molecular weight components, collectively known as natural moisturizing factor (NMF), play an important role in maintaining the stratum corneum (SC) hydration. Previous studies focused on reduced levels of free amino acids (FAAs) in NMF from AD skin. It remains unknown, however, whether other NMF components are also altered in AD. OBJECTIVE To characterize the levels of various NMF components in the SC of healthy subjects and in mild AD adult patients. METHODS NMF components were extracted from three sequential tape-stripped SC samples obtained from the volar forearm. NMF components which were decreased in AD skin were topically applied to examine their contribution to SC moisturization in AD skin. RESULTS We found that although FAAs levels were not remarkably reduced, levels of pyrrolidone carboxylic acid (PCA), lactate, urea, sodium and potassium were significantly decreased in NMF from mild AD skin. Among those components, only the topical application of potassium lactate effectively increased skin surface hydration indicating that reductions of lactate and potassium influence dry skin in mild AD patients. Unlike the distribution of filaggrin-derived FAAs and PCA, lactate, urea, potassium and sodium were abundant in the surface layer of the SC compared with the inner layer of the SC. Such findings strongly suggest that those components are supplied from outside the SC, i.e. they originate from sweat. CONCLUSION The reduced levels of sweat-derived NMF components in mild AD patients suggests that impaired sweat function might in part result in the SC dryness.
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Affiliation(s)
- Tomoko Sugawara
- Innovative Beauty Science Laboratory, Kanebo Cosmetics Inc., Odawara, Japan.
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Brasil Succi I, Teixeira da Silva R, Orofino-Costa R. Rejuvenation of Periorbital Area: Treatment with an Injectable Nonanimal Non-Crosslinked Glycerol Added Hyaluronic Acid Preparation. Dermatol Surg 2012; 38:192-8. [DOI: 10.1111/j.1524-4725.2011.02182.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lee WJ, Kim JY, Song CH, Jung HD, Lee SH, Lee SJ, Kim DW. Disruption of barrier function in dermatophytosis and pityriasis versicolor. J Dermatol 2011; 38:1049-1053. [PMID: 21950511 DOI: 10.1111/j.1346-8138.2011.01320.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Dermatophytes have the ability to form molecular attachments to keratin and use it as a source of nutrients, colonizing keratinized tissues, including the stratum corneum of the skin. Malassezia species also affect the stratum corneum of the skin. Therefore, dermatophytosis and pityriasis versicolor of the skin are thought to be important factors of profound changes in skin barrier structure and function. We aimed to describe the changes in transepidermal water loss (TEWL), stratum corneum hydration, and skin pH in the lesions of the dermatophytosis and pityriasis versicolor. Thirty-six patients with dermatophytosis (14 with tinea cruris, 13 with tinea corporis and nine with tinea pedis or tinea manus) and 11 patients with pityriasis versicolor were included in this study. TEWL, stratum corneum conductance and skin pH were determined by biophysical methods to examine whether our patients exhibited changes in barrier function. Dermatophytosis and pityriasis versicolor except tinea pedis and tinea manus showed highly significant increase in TEWL compared with adjacent infection-free skin. Hydration was significantly reduced in lesional skin compared with adjacent infection-free skin. From this study, infections with dermatophytes and Malassezia species on the body can alter biophysical properties of the skin, especially the function of stratum corneum as a barrier to water loss. On the contrary, infections with dermatophytes on the palms and soles little affect the barrier function of the skin.
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Affiliation(s)
- Weon Ju Lee
- Department of Dermatology, School of Medicine, Kyungpook National University, Daegu, Korea.
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Angelova-Fischer I, Mannheimer AC, Hinder A, Ruether A, Franke A, Neubert RHH, Fischer TW, Zillikens D. Distinct barrier integrity phenotypes in filaggrin-related atopic eczema following sequential tape stripping and lipid profiling. Exp Dermatol 2011; 20:351-6. [PMID: 21410766 DOI: 10.1111/j.1600-0625.2011.01259.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Filaggrin gene (FLG) loss-of-function mutations have been shown to represent the strongest so far known genetic risk factor for atopic dermatitis (AD). Whereas the barrier characteristics in FLG mutation carriers under baseline conditions have been investigated, there are only limited data on the permeability barrier function in filaggrin-AD under compromised conditions. AIM We investigated: (i) stratum corneum (SC) integrity/cohesion; (ii) barrier recovery after controlled mechanical and irritant-induced barrier abrogation; and (iii) the lipid composition of the non-lesional and lesional skin of AD patients harbouring the European R501X, 2282del4, 3702delG, R2447X or S3247X FLG variants. METHODS Thirty-seven AD patients (14 FLG mutation carriers and 23 non-carriers) and 20 healthy controls participated in the study. Stratum corneum integrity/cohesion was assessed by measurement of transepidermal water loss (TEWL) and amount of removed protein following sequential tape stripping. Barrier recovery was monitored by repeated measurements of TEWL and erythema up to 96 h after barrier abrogation. Samples for lipid analysis were obtained from non-lesional and lesional skin using the cyanoacrylate method. RESULTS Tape stripping revealed distinct genotype-related impairment of the SC integrity/cohesion. No differences in the rate of barrier recovery among the groups were found. The SC lipid analysis revealed significant differences regarding the percentage amount of cholesterol, ceramide/cholesterol ratio and triglycerides in the uninvolved skin as well as the amounts of free fatty acids, CER[EOH] and triglycerides in the skin lesions of the AD FLG mutation carriers. CONCLUSIONS Our results provide evidence for discernible FLG-related barrier integrity phenotypes in atopic eczema.
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Affiliation(s)
- Irena Angelova-Fischer
- Department of Dermatology, University of Lübeck, Ratzeburger Allee 160, Lübeck, Germany.
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Bonté F. Skin moisturization mechanisms: new data. ANNALES PHARMACEUTIQUES FRANÇAISES 2011; 69:135-41. [PMID: 21570537 DOI: 10.1016/j.pharma.2011.01.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 12/23/2010] [Accepted: 01/12/2011] [Indexed: 10/15/2022]
Abstract
The main function of the skin is to protect the body against exogenous substances and excessive water loss. The skin barrier is located in the outermost layer of the skin, called the stratum corneum, which is composed of corneocytes, originating from the keratinocytes differentiation process, embedded in organized complex lipid domains. Moisturizing of the skin is recognized as the first anti-aging skin care. Skin moisturization is essential for its appearance, protection, complexion, softness and the reinforcement of its barrier properties against deleterious and exogenous environmental factors. The intrinsic water binding capacity of skin is not only due to the complex natural moisturizing factor present in corneocytes, but also to hyaluronic acid and a regulated water transport within the skin. Recent data shows that the water movements between the cells at the different levels of the epidermis are due to dedicated water and glycerol transport proteins named aquaporins. Their role in the skin moisturization is completed by corneodesmosomes and tight junctions. Water and pH are now shown to be of prime importance in the regulation of the epidermal enzymes linked to corneocytes desquamation and lipid synthesis. Furthermore, the level of moisturization of the skin is important in its protection against repeated exposure to various irritant agents or phenomena such as very frequent washing with strong tensioactive materials.
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Affiliation(s)
- F Bonté
- LVMH Recherche, Saint-Jean-de-Braye, France.
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Visscher MO, Utturkar R, Pickens WL, LaRuffa AA, Robinson M, Wickett RR, Narendran V, Hoath SB. Neonatal skin maturation--vernix caseosa and free amino acids. Pediatr Dermatol 2011; 28:122-32. [PMID: 21504444 DOI: 10.1111/j.1525-1470.2011.01309.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Neonatal skin hydration decreases rapidly postnatally and then increases, indicating adaptive changes in stratum corneum water handling properties. Transition from high to low humidity at birth may initiate filaggrin proteolysis to free amino acids. Neonatal skin with vernix caseosa retained is more hydrated than skin with vernix removed. This study examines the potential roles of free amino acids and vernix in postnatal adaptation of infant stratum corneum in vivo. Specifically, the ontogeny of free amino acid generation in neonatal stratum corneum and the role of vernix caseosa in postnatal adaptation were examined using high performance liquid chromatography. Free amino acids were quantified for infant skin samples collected at (i) birth and 1 month and (ii) birth and 24 hours after vernix caseosa retention or removal and compared to neonatal foreskin, vernix caseosa, and adult stratum corneum using t-tests, analysis of variance, or univariate procedures. Free amino acids were extremely low at birth, significantly higher 1 month later but lower than in adults. Vernix caseosa retention led to significantly higher free amino acids 24 hours after birth compared to infants with vernix caseosa removed, and it paralleled the higher stratum corneum hydration of vernix caseosa-retained skin. Vernix caseosa contained free amino acids, with glutamic acid and histidine levels higher than in infants. Free amino acids in vernix caseosa-retained skin appear to originate from vernix caseosa. Free amino acids were lower in neonatal foreskin than adult forearm stratum corneum. Arginine was higher than citrulline at birth, but levels were comparable in older infants. The free amino acid increase at 1 month may be initiated by the humidity transition at birth and supports results in animals. The findings have implications for infant skin care practices.
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Affiliation(s)
- Marty O Visscher
- The Skin Sciences Institute, Division of Neonatology and Pulmonary Biology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229, USA.
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Qin H, Zheng X, Zhong X, Shetty AK, Elias PM, Bollag WB. Aquaporin-3 in keratinocytes and skin: its role and interaction with phospholipase D2. Arch Biochem Biophys 2011; 508:138-43. [PMID: 21276418 DOI: 10.1016/j.abb.2011.01.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 01/20/2011] [Accepted: 01/21/2011] [Indexed: 12/30/2022]
Abstract
Aquaporin 3 (AQP3) is an aquaglyceroporin that transports water and glycerol and is expressed in the epidermis, among other epithelial tissues. We have recently shown that there is an association between this glycerol channel and phospholipase D2 (PLD2) in caveolin-rich membrane microdomains. While PLD2 is able to hydrolyze membrane phospholipids to generate phosphatidic acid, this enzyme also catalyzes, in the presence of primary alcohols, a transphosphatidylation reaction to produce a phosphatidylalcohol. We have proposed that AQP3 associated with PLD2 provides the physiological primary alcohol glycerol to PLD2 for use in the transphosphatidylation reaction to generate phosphatidylglycerol (PG). Further, we have proposed that PG functions as a signaling molecule to mediate early epidermal keratinocyte differentiation, and manipulation of this signaling module inhibits keratinocyte proliferation and enhances differentiation. In contrast, other investigators have suggested a proliferative role for AQP3 in keratinocytes. In addition, AQP3 knockout mice exhibit an epidermal phenotype, characterized by dry skin, decreased elasticity and delayed barrier repair and wound healing, which can be corrected by glycerol but not other humectants. AQP3 levels have also been found to be altered in human skin diseases. In this article the evidence supporting a role for AQP3 in the epidermis will be discussed.
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Affiliation(s)
- Haixia Qin
- Institute of Molecular Medicine and Genetics, Georgia Health Sciences University (formerly Medical College of Georgia), Augusta, GA 30912, USA
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Pereda MDCV, Dieamant GDC, Eberlin S, Werka RM, Colombi D, Queiroz MLDS, Di Stasi LC. Expression of differential genes involved in the maintenance of water balance in human skin by Piptadenia colubrina extract. J Cosmet Dermatol 2010; 9:35-43. [PMID: 20367671 DOI: 10.1111/j.1473-2165.2009.00458.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Hydration and integrity of the stratum corneum (SC) is an important determinant of skin appearance, metabolism, mechanical properties, and barrier function. The presence of aquaglyceroporins and envelope proteins are crucial to provide greater corneocyte cohesion to keep water and other moisturizers in the skin. AIMS In this study, we evaluated the ability of Piptadenia colubrina, a plant native of South American rain forests, in the expression of genes involved in skin capacitance and SC integrity. METHODS The expression of genes for aquaporin-3 (AQP3), loricrin, involucrin (INV), and filaggrin (FLG) was measured by real-time PCR, using an in vitro model of human keratinocytes incubated with concentrations of 2.5, 5, 10, and 20 mg/mL of a hydroglycolic extract of P. colubrina (HEPC). The amount of AQP3 protein was also tested by immunohistochemistry in human skin explants. Clinical trials were conducted to evaluate the effects of a gel-cream containing HEPC on the glycerol index and skin capacitance. RESULTS Hydroglycolic extract of P. colubrina increased both the expression and immunoreactivity of AQP3 in cultured keratinocytes and human skin explants. The gene induction to envelope proteins FLG and INV was also observed after cell incubation with HEPC. Skin capacitance was significantly improved in human volunteers under treatment with HEPC-containing cream. CONCLUSIONS The extract of P. colubrina promotes cellular hydration and induces gene expression of envelope proteins providing greater corneocyte cohesion to keep water and other moisturizers in the skin and an appropriate epidermal adhesion. The in vitro findings were clinically confirmed and encourage the clinical use of this compound in skin care products.
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Li J, Tang H, Hu X, Chen M, Xie H. Aquaporin-3 gene and protein expression in sun-protected human skin decreases with skin ageing. Australas J Dermatol 2010; 51:106-12. [DOI: 10.1111/j.1440-0960.2010.00629.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Liu J, Man WY, Lv CZ, Song SP, Shi YJ, Elias PM, Man MQ. Epidermal permeability barrier recovery is delayed in vitiligo-involved sites. Skin Pharmacol Physiol 2010; 23:193-200. [PMID: 20185976 DOI: 10.1159/000288166] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Accepted: 01/07/2010] [Indexed: 01/17/2023]
Abstract
BACKGROUND/OBJECTIVES Prior studies have demonstrated that both the skin surface pH and epidermal permeability barrier function vary with skin pigmentation types. Although melanin deficiency is the main feature of vitiligo, alterations in cutaneous biophysical properties in vitiligo have not yet been well defined. In the present study, stratum corneum (SC) hydration, the skin surface pH and epidermal permeability barrier function in vitiligo were evaluated. METHODS A total of 30 volunteers with vitiligo comprising 19 males and 11 females aged 13-51 years (mean age: 27.91 +/- 2.06 years) were enrolled in this study. The skin surface pH, SC hydration, melanin/erythema index and transepidermal water loss (TEWL) were measured by respective probes connected to a Courage-Khazaka MPA5. SC integrity was determined by measuring the TEWL following each D-Squame application. The barrier recovery rate was assessed at 5 h following barrier disruption by repeated tape stripping. RESULTS In addition to SC hydration, both melanin and erythema index were significantly lower in vitiligo lesions than in contralateral, nonlesional sites, while no difference in skin surface pH between vitiligo-involved and uninvolved areas was observed. In addition, neither the basal TEWL nor SC integrity in the involved areas differed significantly from that in the uninvolved areas. However, barrier recovery in vitiligo-involved sites was significantly delayed in comparison with uninvolved sites (40.83 +/- 5.39% vs. 58.30 +/- 4.71%; t = 2.441; p < 0.02). CONCLUSION Barrier recovery following tape stripping of the SC is delayed in vitiligo. Therefore, improvement in epidermal permeability barrier function may be an important unrecognized factor to be considered in treating patients with vitiligo.
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Affiliation(s)
- J Liu
- Dalian Skin Disease Hospital, Dalian, The People's Republic of China
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Hatano Y, Man MQ, Uchida Y, Crumrine D, Mauro TM, Feingold KR, Elias PM, Holleran WM. Murine atopic dermatitis responds to peroxisome proliferator-activated receptors alpha and beta/delta (but not gamma) and liver X receptor activators. J Allergy Clin Immunol 2009; 125:160-9.e1-5. [PMID: 19818482 DOI: 10.1016/j.jaci.2009.06.049] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2009] [Revised: 06/19/2009] [Accepted: 06/29/2009] [Indexed: 12/22/2022]
Abstract
BACKGROUND Atopic dermatitis (AD) is a chronic inflammatory dermatosis now increasingly linked to mutations that alter the structure and function of the stratum corneum. Activators of peroxisome proliferator-activated receptors (PPARs) alpha, beta/delta, and gamma and liver X receptor (LXR) regulate epidermal protein and lipid production, leading to superior barrier function. Additionally, some of these activators exhibit potent antihyperplastic and anti-inflammatory activity in irritant contact dermatitis and acute allergic contact dermatitis murine models. OBJECTIVE We evaluated the efficacy of PPAR/LXR activation in a hapten (oxazolone [Ox])-induced AD-like model (Ox-AD) in hairless mice. METHODS Ox-AD was established with 10 Ox challenges (every other day) on the flank. After the establishment of Ox-AD, twice-daily topical application with individual PPAR/LXR activators was then performed for 4 days, with continued Ox challenges every other day. The efficacy of topical PPAR/LXR activators to reduce parameters of Ox-AD was assessed physiologically, morphologically, and immunologically. RESULTS Certain topical activators of PPARalpha, PPARbeta/delta, and LXR, but not activators of PPARgamma, reversed the clinical dermatosis, significantly improved barrier function, and increased stratum corneum hydration in Ox-AD mice. In addition, the same activators, but again not PPARgamma, largely reversed the immunologic abnormalities in Ox-AD mice, including the increased T(H)2 markers, such as tissue eosinophil/mast cell density, serum thymus and activation-related chemokine levels, the density of chemoattractant receptor-homologous molecule expressed on T(H)2-positive lymphocytes (but not serum IgE levels), and reduced IL-1alpha and TNF-alpha activation, despite ongoing hapten challenges. CONCLUSION These results suggest that topical applications of certain activators/ligands of PPARalpha, PPARbeta/delta, and LXR could be useful for the treatment of AD in human subjects.
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Affiliation(s)
- Yutaka Hatano
- Dermatology Service, Veterans Affairs Medical Center, University of California, San Francisco, CA, USA
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Man MQ, Xin SJ, Song SP, Cho SY, Zhang XJ, Tu CX, Feingold KR, Elias PM. Variation of skin surface pH, sebum content and stratum corneum hydration with age and gender in a large Chinese population. Skin Pharmacol Physiol 2009; 22:190-9. [PMID: 19648780 DOI: 10.1159/000231524] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Accepted: 04/14/2009] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND OBJECTIVES Evidence suggests the importance of skin biophysical properties in predicting diseases and in developing appropriate skin care. The results to date of studies on skin surface pH, stratum corneum (SC) hydration and sebum content in both genders and at various ages have been inconclusive, which was in part due to small sample size. Additionally, little is known about the skin physical properties of Asian, especially Chinese, subjects. In the present study, we assess the difference in skin surface pH, sebum content and SC hydration at various ages and in both genders in a large Chinese population without skin diseases. METHODS 713 subjects (328 males and 385 females) aged 0.5-94 years were enrolled in this study. The subjects were divided by age into 5 groups, i.e., 0-12, 13-35, 36-50, 51-70 and over 70 years old. A multifunctional skin physiology monitor was used to measure SC hydration, skin surface pH and sebum content on both the forehead and the forearms. RESULTS In males, the highest sebum content was found on the forearm and the forehead in the age groups 36-50 (93.47 +/- 10.01 microg/cm(2)) and 51-70 years (9.16 +/- 1.95 microg/cm(2)), while in females, the highest sebum content was found on the forearm and the forehead in the age groups 13-35 (61.91 +/- 6.12 microg/cm(2)) and 51-70 years (7.54 +/- 2.55 microg/cm(2)). The forehead sebum content was higher in males aged 13-70 years than in age-matched females; the sebum content on the forehead in both males and females was higher than that on the forearm. Skin surface pH on the forehead of both males and females over the age of 70 years was higher than that in younger groups. SC hydration on the forehead in both males and females was lower above the age of 70, and the one in males aged 13-35 was higher than that in females (43.99 +/- 1.88 vs. 36.38 +/- 1.67 AU, p < 0.01). SC hydration on the forehead in both males and females did not significantly differ from that on the forearm. CONCLUSIONS In a large Chinese cohort, the skin surface pH, sebum content and SC hydration vary with age, gender and body site.
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Affiliation(s)
- M Q Man
- Department of Dermatology and Medicine, University of California School of Medicine, San Francisco, Calif., USA.
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Maintenance of an acidic stratum corneum prevents emergence of murine atopic dermatitis. J Invest Dermatol 2009; 129:1824-35. [PMID: 19177139 DOI: 10.1038/jid.2008.444] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Neutralization of stratum corneum (SC) adversely impacts key epidermal functions, including permeability barrier homeostasis and SC integrity. Conversely, acidification of SC improves these functions in developmentally impaired (neonatal or aged) skin, and enhances function in normal skin. Hence, we hypothesized that acidification could alter the course of inflammatory dermatoses, which invariably exhibit an increased SC pH. Maintenance of a low pH by topical applications of the polyhydroxyl acid, lactobionic acid, during the repeated-challenge phase inhibited the development of oxazolone-induced atopic dermatitis (AD). Neither gross/histological dermatitis nor altered barrier function developed, and emergence of epidermal hyperplasia was prevented; however, cytokine generation decreased. Acidification also largely normalized the development of hapten-induced changes in eosinophil/mast cell densities, density of chemoattractant receptor-homologous molecule expressed on TH2-positive lymphocytes, and serum IgE levels. The pH-induced improvement in barrier function most likely accounts for the anti-inflammatory activity, which could be further attributed to normalization of both lamellar body secretion and lamellar bilayer formation. Acidification of SC alone substantially prevents development of barrier abnormalities and downstream immune abnormalities during the elicitation phase of murine AD. These results provide direct evidence for the "outside-inside" pathogenesis of AD and further suggest that maintenance of an acidic SC pH could prevent the emergence of AD in humans.
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Boury-Jamot M, Daraspe J, Bonté F, Perrier E, Schnebert S, Dumas M, Verbavatz JM. Skin aquaporins: function in hydration, wound healing, and skin epidermis homeostasis. Handb Exp Pharmacol 2009:205-217. [PMID: 19096779 DOI: 10.1007/978-3-540-79885-9_10] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Several aquaporins (AQPs) are expressed in mammalian skin. Some are directly involved in water transport, such as AQP5, which is involved in sweat secretion. In contrast, the physiological role of skin aquaglyceroporins, which permeate both water and glycerol, appears more and more complex. AQP3 is the most abundant skin aquaglyceroporin. Both water and glycerol transport by AQP3 appear to play an important role in hydration of mammalian skin epidermis. In addition, recent data suggest that glycerol transport by AQP3 is involved in the metabolism of lipids in skin as well as in the regulation of proliferation and differentiation of keratinocytes. Finally, AQP3 is also believed to be important in wound healing, as a water channel by facilitating cell migration, and as a glycerol transporter by enhancing keratinocyte proliferation and differentiation.
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Affiliation(s)
- Mathieu Boury-Jamot
- IBITEC-S and CNRS URA 2096, CEA-Saclay F-91191 Gif-sur-Yvette and LRA17V, University Paris-Sud 11, Orsay, F-91400, France
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