Skin Pharmacology and Physiology最新文献

{"title":"A Consideration on Infinite and Finite Dosing in Skin Permeation Using Reconstructed Models.","authors":"Yuko Saeki, Eiko Kato, Yoshihiro Tokudome","doi":"10.1159/000541325","DOIUrl":"10.1159/000541325","url":null,"abstract":"<p><strong>Introduction: </strong>When vitamin derivatives penetrate the epidermis, they release active compound such as ascorbic acids (AsA) and tocopherols via enzymatic digestion of chemical modifiers. To determine the transdermal penetration of the derivatives, the total permeation of both the derivatives and their active compounds that released from the derivatives should be considered. In this study, we established a skin penetration test method using a cultured, reconstructed skin model with active epidermal enzymes. And we analyzed two vitamin derivatives with different chemical properties: magnesium ascorbyl phosphate (APM) and sodium tocopheryl phosphate (TPNa), both of which has been confirmed their skin permeation in the reconstructed models and the digestion to AsA and α-tocopherol by the epidermal enzymes, respectively.</p><p><strong>Methods: </strong>We prepared the 1% of water solution containing either APM or TPNa. Then, we tested the cumulative permeation of the derivatives at 2 application volumes, 25 μL/cm2 (finite dosing) and 85 μL/cm2 (infinite dosing), on cultured reconstructed skin and observed the permeation of the permeants every 2 h up to 24 h.</p><p><strong>Results: </strong>When the applied formula was used to assess the evaporation rate to determine an end point of the test system, all the water evaporated in 6 h in finite model and in 8 h in infinite model. Both models showed that the cumulative permeation of the active compounds increased and a constant flux until 8 h after application; however, the flux decreased thereafter, indicating that the decreased flux depended on an end point of the test system. This indicated that our test system can analyze the permeation of the vitamin derivatives within 8 h before reaching the end point.</p><p><strong>Conclusion: </strong>Using an infinite model of this system, we assessed the cumulative permeation of vitamin derivatives within 8 h using a reconstructed skin model.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intraday Variations in Skin Water Parameters.","authors":"Harvey N Mayrovitz","doi":"10.1159/000541547","DOIUrl":"10.1159/000541547","url":null,"abstract":"<p><strong>Introduction: </strong>Three interrelated skin water assessments include stratum corneum hydration (SCH) via electrical measurements, skin water using tissue dielectric constant (TDC) measurements, and transepidermal water loss (TEWL). These are differentially used for skin physiology research, clinical assessments of dermatological conditions and to assess skin water in diabetes and lymphedema. Often volar forearm skin is used for assessments done at various times of day (TOD). The present goal was to assess the extent of intraday variability in SCH, TDC, and TEWL.</p><p><strong>Methods: </strong>Twelve medical students self-measured SCH, TDC, and TEWL on their forearm every 2 h from 08:00 to 24:00 h on 2 consecutive days. All participants were well trained and pre-certified in all procedures. Tests for parameter differences among TOD were via the nonparametric Friedman test.</p><p><strong>Results: </strong>No significant differences in SCH or TEWL were found among TOD over the 16-h interval for either day or combined. Contrastingly, TDC decreased slightly but significantly from morning through evening. There was no evidence of a diurnal pattern. Interestingly, a significant nonlinear relationship between TEWL and SCH was detected.</p><p><strong>Conclusion: </strong>Findings indicate only minor intraday variations with TOD trend except for TDC which decreases slightly from morning through evening. The clinical relevance relates to the confidence now gained associated with the parameter estimates when measured at different TOD during normal clinic hours or beyond. This should help in estimating the potential importance of small differences if measured at a different TOD. From a physiological viewpoint, the findings uncover and describe an interesting nonlinear relationship between TEWL and SCH which may serve to propel further investigations that might better characterize this process.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142294949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Brief Review of Vehicles for Topical Therapies.","authors":"Kripa Ahuja,Miranda An,Peter Lio","doi":"10.1159/000541418","DOIUrl":"https://doi.org/10.1159/000541418","url":null,"abstract":"Background Topical therapy has been a fundamental part of dermatology, evolving from early ointments to advanced transdermal treatments. These formulations allow for effective management of skin conditions by maximizing local drug delivery and minimizing systemic effects. Modern topical therapies continue to benefit from innovations that improve both efficacy and patient outcomes. Summary Topical formulations consist of a vehicle and active ingredients, with the vehicle enhancing drug absorption and patient experience. Historically categorized by physical properties, vehicles are vital in drug delivery. Recent innovations, such as nanoemulsions and derma-membrane structures, offer improved skin penetration and therapeutic results, representing significant advancements in topical treatment options. Key Messages Topical therapies provide targeted, effective treatment in dermatology with minimal systemic side effects. Vehicle choice is essential to therapy success, and innovations such as nanoemulsions are improving drug delivery and patient care. Ongoing research into novel delivery systems continues to enhance the future of dermatological treatments.","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cluster Analysis Identifies Clinical Phenotypes of Primary Hyperhidrosis.","authors":"Mattias A S Henning, Gregor B E Jemec, Ole B Pedersen, Elisabeth H Taudorf","doi":"10.1159/000540516","DOIUrl":"10.1159/000540516","url":null,"abstract":"<p><strong>Introduction: </strong>Identifying subgroups of patients with primary hyperhidrosis (PHH) can improve the understanding of the disease pathophysiology. The study objective was to determine the naturally occurring subgroups of patients with PHH based on clinical characteristics.</p><p><strong>Methods: </strong>In this retrospective cohort study, data were collected from participants included in a clinical trial. The data were collected between January 2020 and June 2021 from outpatients with PHH attending a dermatologic department in Denmark. Overall, 84 patients with PHH were screened for inclusion in the clinical trial. Of these, 41 met the eligibility criteria. Four participants were excluded because of missing data. The main outcome was the identification of subgroups of patients with PHH using an unsupervised hierarchical cluster analysis.</p><p><strong>Results: </strong>Overall, 37 patients were included {28 (76.7%) females; median age at inclusion 28.0 (interquartile range [IQR] 24.0-38.3); median body mass index 24.9 (IQR 20.9-27.4); median age of onset 13.0 (IQR 9.5-18.5); and 26 (70.3%) had a familial disposition toward PHH}. Two clusters of 18 and 17 patients were identified. The first cluster had, when compared to the second, a younger age of onset (median age 11.0 [IQR 0-13.0] vs. 17.0 [IQR 15.0-21.0], p = 0.003) and higher sweat rates on gravimetry (median 175.0 [IQR 121.2-252.5] vs. 40.0 [IQR 20.0-60.0] milligrams of sweat/5 min, p &lt; 0.001) and transepidermal water loss (median 93.7 [IQR 91.2-97.8] vs. 59.0 [IQR 44.4-73.2] g/m2/h, p &lt; 0.001). No differences were observed for the other variables.</p><p><strong>Conclusions: </strong>This study identifies 2 subgroups of patients with PHH. The patients with an onset of PHH during childhood had a substantially higher sweat and evaporation rate in adulthood than those with an onset during adolescence. These findings may imply a changed understanding of the pathophysiology of PHH, by indicating that an early disease onset can lead to a worse disease course.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142093713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Bioequivalence and Pharmacokinetic Profiles for Topical Desonide Cream Using Chinese Skins.","authors":"Yuanyuan Sun, Nan Yang, Jie Huang, An Yao, Ling Ye, Shuang Yang, Min Xiao, Xuqing Zhang, Jinsong Ding, Yun Kuang, Yali Zhou, Guoping Yang","doi":"10.1159/000540782","DOIUrl":"10.1159/000540782","url":null,"abstract":"<p><strong>Introduction: </strong>Skin-blanching assay has been established as a surrogate method for assessing bioequivalence of topical corticosteroids. This study aimed to apply the skin-blanching assay to evaluate the bioequivalence of a test desonide cream (T) compared with the reference Desonide® (R) using Chinese skins. Additionally, the pharmacokinetics and safety profiles were also assessed.</p><p><strong>Methods: </strong>By detecting the degree of skin blanching under different dose durations in a pilot dose-duration-response study, the area under the observed effect-time curve (AUEC) and half of the maximum effect (ED50) was calculated. Based on this, the skin color of different time points after a dose duration of ED50, D1 (0.5 × ED50), and D2 (2 × ED50) were detected as a pharmacodynamic indicator to compare between test and reference creams. Single-center, single-dose, randomized, open-label, two-cycle crossover pharmacokinetic studies were designed to make sure the exposure of tested formulationswas not higher than that of the reference formulations. Subjects experiencing adverse events (AEs) were monitored and utilized for safety analysis.</p><p><strong>Results: </strong>These studies involved 12 subjects for the dose-duration-response study, 100 subjects for the bioequivalence study, and 12 subjects for the pharmacokinetic study. The results showed that the population ED50 was 0.88 ± 0.45 h; the mean ratio of area under effective curve from 0 to 24 h (AUEC0-24h) of test and reference preparations was 0.95, with a 90% confidence interval as 88.09-101.72%, indicating the bioequivalence of the test formulation and Desonide®. The maximum plasma concentration (Cmax) and area under the concentration time curve from time 0 to the last time point (AUC0-t) of T and R were 20.8 ± 11.5 pg/mL versus 19.7 ± 10.1 pg/mL, respectively, and 451.04 ± 363.65 pgh/mL versus 541.47 ± 581.41 pgh/mL, respectively. The systemic exposure of a single dose of the test cream was not higher than that of the reference preparation. All of the volunteers experienced grade 1 AEs, suggesting that single administration of the test desonide cream is well tolerated in the Chinese healthy population.</p><p><strong>Conclusions: </strong>This study demonstrated the applicability of skin-blanching assay in Chinese skins and established the bioequivalence of test and reference desonide creams.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142005175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preventive and Therapeutic Benefits of Natural Ingredients in Photo-Induced Epidermal Dysfunction.","authors":"Dongyun Lei, L. Ye, S. Wen, Junling Zhang, Litao Zhang, Mao-Qiang Man","doi":"10.1159/000538832","DOIUrl":"https://doi.org/10.1159/000538832","url":null,"abstract":"BACKGROUND\u0000The skin, particularly the epidermis, is subjected to various external stresses, including ultraviolet [UV] irradiation. UV irradiation, mainly UVB at wavelength of 280-315 nm, can alter several epidermal functions, including cutaneous inflammation, epidermal hyperproliferation, DNA damage, disruption of epidermal permeability barrier and reduction in stratum corneum hydration levels. Because of the negative impacts of UVB irradiation on epidermal functions, great efforts have been made to develop regimens for the protection of alterations in epidermal function induced by UV irradiation.\u0000\u0000\u0000SUMMARY\u0000While sunscreen can provide physical barrier to UV light, some natural ingredients can also effectively protect the skin from UVB irradiation-induced damages. Studies have demonstrated that either topical or oral administrations of some natural ingredients attenuate UVB irradiation-induced alterations in the epidermal function. The underlying mechanisms by which natural ingredients improve epidermal functions are attributable to antioxidation, stimulation of keratinocyte differentiation, increases in the content of epidermal natural moisturizers and inhibition of inflammation.\u0000\u0000\u0000KEY MESSAGE\u0000Some natural ingredients exhibit protective and therapeutical benefits in photo-induced epidermal dysfunctions via divergent mechanisms.","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140710741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of a pH-Regulating Emollient Cream in Mild Atopic Dermatitis Patients with Moderate Localized Lesions.","authors":"Sue Phay Ng, Stephan Bielfeldt, Sabrina Laing, Simon Danby, Michael J John Cork","doi":"10.1159/000541022","DOIUrl":"10.1159/000541022","url":null,"abstract":"<p><strong>Introduction: </strong>Increased skin pH values in patients with atopic dermatitis (AD) contribute to poor antimicrobial and permeability barrier functions of the skin. In practice, the majority of topical preparations available for dry skin conditions do not provide sufficient pH and buffering capacity for maintaining optimum skin surface conditions. To address this issue, we tested a novel zinc lactobionate preparation to determine whether the regular application would lower skin surface pH, and in doing so improve the condition of lesional skin.</p><p><strong>Methods: </strong>The assessment for local severity of AD was done with the Scoring Atopic Dermatitis Index (SCORAD) and skin dryness was assessed by capacitance measurement.</p><p><strong>Results: </strong>The results showed that the test product lowered skin pH and improved AD skin lesions from moderate to mild during 2 weeks of application. In the treated area a lowered pH of about 0.85 units was found. Together with the lowering of pH, the local SCORAD significantly improved from 8.3 on average down to 4.0, while in the untreated area, only a slight improvement (from 8.2 to 6.4) was found.</p><p><strong>Conclusion: </strong>Synergistic effects of the test product's pH lowering and emollient properties might explain the observed improvements in clinical signs of AD and further research against a comparator would allow the specific contribution of pH modulation to these improvements to be unambiguously isolated.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11488831/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142093714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diesel Particulate Matter Permeation into Normal Human Skin and Intervention Using a Topical Ceramide Formulation.","authors":"Kyong-Oh Shin, Kenya Ishida, Hisashi Mihara, Yerim Choi, Jae-Ho Park, Soo-Hyun Park, Jin-Taek Hwang, Joan S Wakefield, Yasuko Obata, Yoshikazu Uchida, Kyungho Park","doi":"10.1159/000539291","DOIUrl":"10.1159/000539291","url":null,"abstract":"<p><strong>Introduction: </strong>Diesel particulate matter (DPM) emitted from diesel engines is a major source of air pollutants. DPM is composed of elemental carbon, which adsorbs organic compounds including toxic polycyclic aromatic hydrocarbons (PAHs). The skin, as well as airways, is directly exposed to DPM, and association of atopic dermatitis, psoriasis flares, and premature skin aging with air pollutant levels has been documented. In skin, the permeation of DPM and DPM-adsorbed compounds is primarily blocked by the epidermal permeability barrier deployed in the stratum corneum. Depending upon the integrity of this barrier, certain amounts of DPM and DPM-adsorbed compounds can permeate into the skin. However, this permeation into human skin has not been completely elucidated.</p><p><strong>Methods: </strong>We assessed the permeation of PAHs (adsorbed to DPM) into skin using ex vivo normal (barrier-competent) organ-cultured human skin after application of DPM. Two major PAHs, 2-methylnaphthalene and triphenylene, and a carcinogenic PAH, benzo(a)pyrene, all found in DPM, were measured in the epidermis and dermis using liquid chromatography electrospray ionization tandem mass spectrometry. In addition, we investigated whether a topical formulation can attenuate the permeation of DPM into skin.</p><p><strong>Results: </strong>2-Methylnaphthalene, triphenylene, and benzo(a)pyrene were recovered from the epidermis. Although these PAHs were also detected in the dermis after DPM application, these PAH levels were significantly lower than those found in the epidermis. We also demonstrated that a topical formulation that has the ability to form more uniform membrane structures can significantly suppress the permeation of PAHs adsorbed to DPM into the skin.</p><p><strong>Conclusion: </strong>Toxic compounds adsorbed by DPM can permeate even barrier-competent skin. Hence, barrier-compromised skin, such as in atopic dermatitis, psoriasis, and xerosis, is even more vulnerable to air pollutants. A properly formulated topical mixture that forms certain membrane structures on the skin surface can effectively prevent permeation of exogenous substances, including DPM, into skin.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141071624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-Term Disinfection in Operating Rooms Affects Skin Microbiota and Metabolites of Medical Personnel.","authors":"Yu Yan, Shuzheng Huang, Yu Zeng, Siyuan Yue, Tong Wang, Lin Yuan, Junhui Nie","doi":"10.1159/000539100","DOIUrl":"10.1159/000539100","url":null,"abstract":"<p><strong>Introduction: </strong>Disinfectants play a critical role in reducing healthcare-associated infections by eliminating microorganisms on surfaces. However, prolonged use of disinfectants may adversely affect the skin microflora, essential for skin health and infection prevention. This study investigates the impact of disinfection on the skin microbiota and metabolites of medical personnel in operating rooms, aiming to provide a scientific foundation for safeguarding their skin health.</p><p><strong>Methods: </strong>We conducted 16S sequencing and metabolomic analysis to assess the effects of disinfection on the skin microbiota and metabolites of medical personnel. Samples were collected from operating room personnel after disinfectant exposure to identify changes in microbial communities and metabolite profiles.</p><p><strong>Results: </strong>Our analysis revealed that prolonged use of disinfectants led to alterations in skin microbial communities and microbial metabolites. These alterations included the production of harmful metabolites that could potentially promote skin infections and other health issues among medical personnel.</p><p><strong>Conclusion: </strong>The findings underscore the importance of minimizing disruptions to skin microbiota and metabolites caused by long-term disinfectant use to preserve the overall health of medical personnel. This study provides valuable insights into the relationship between disinfectant use, skin microbiota, and metabolites, highlighting the necessity for further research in this area.</p>","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140863861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Etiological Insights of Acne in Atopic Dermatitis Patients under Upadacitinib Treatment: An Exploratory Study.","authors":"Guilherme Muzy","doi":"10.1159/000539207","DOIUrl":"10.1159/000539207","url":null,"abstract":"","PeriodicalId":21748,"journal":{"name":"Skin Pharmacology and Physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140863860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}