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Skin Pharmacology and Physiology

Işın Sinem Bağcı, Cristel Ruini, Anne-Charlotte Niesert, Orsolya N Horváth, Carola Berking, Thomas Ruzicka, Tanja von Braunmühl
BACKGROUND/AIMS: Ethnic skin types are known to differ in their morphological and physiological features. Thus, treatment responses may vary among different races. We aimed to assess skin morphology of different ethnicities and to compare the effect of short-term moisturizer application using optical coherence tomography (OCT) and reflectance confocal microscopy (RCM). METHODS: Thirty healthy female subjects of European, Asian and Black ethnicity at 30-45 years of age were included in the study...
March 14, 2018: Skin Pharmacology and Physiology
Eva K B Pfannes, Lina Weiss, Sabrina Hadam, Jessica Gonnet, Béhazine Combardière, Ulrike Blume-Peytavi, Annika Vogt
The success of topically applied treatments on skin relies on the efficacy of skin penetration. In order to increase particle or product penetration, mild skin barrier disruption methods can be used. We previously described cyanoacrylate skin surface stripping as an efficient method to open hair follicles, enhance particle penetration, and activate Langerhans cells. We conducted ex vivo and in vivo measurements on human skin to characterize the biological effect and quantify barrier disruption-related inflammation on a molecular level...
March 7, 2018: Skin Pharmacology and Physiology
Jukkarin Srivilai, Kanjana Nontakhot, Thanawan Nutuan, Neti Waranuch, Nantaka Khorana, Wudtichai Wisuthiprot, C Norman Scholfield, Katechan Champachaisri, Kornkanok Ingkaninan
BACKGROUND: Sesquiterpenes in Curcuma aeruginosa Roxb. inhibit steroid 5α-reductase and dihydrotestosterone production, and reverse androgenic alopecia. This study sought to show that a high sesquiterpene C. aeruginosa extract (CA-ext) retards axillary hair growth in women. METHODS: Thirty women (age 20-52 years) were recruited into a 12-week, double-blind, placebo-controlled intervention for CA-ext treatment, where they were randomly allocated to a left or right armpit group...
February 9, 2018: Skin Pharmacology and Physiology
Wei Liu, Xiaochuan Pan, Andrea Vierkötter, Qun Guo, Xuying Wang, Qiaowei Wang, Sophie Seité, Dominique Moyal, Tamara Schikowski, Jean Krutmann
BACKGROUND/AIMS: There is increasing evidence that exposure to air pollutants, including particulate matter (PM2.5, PM10), nitrogen dioxide (NO2), and sulfur dioxide (SO2), might aggravate preexisting skin diseases such as eczema and urticaria. Here we investigated if a possible link exists between air pollution and acne vulgaris. We assessed the association between ambient air pollutant concentrations and the number of visits of patients for acne vulgaris to a dermatological outpatient clinic in Beijing, China, from April 1, 2012 to April 30, 2014...
February 7, 2018: Skin Pharmacology and Physiology
Keti Zeka, Ketan C Ruparelia, Claudia Sansone, Guido Macchiarelli, Maria Adelaide Continenza, Randolph R J Arroo
Saffron extracts have a long history of application as skin protectant, possibly due to their ability to scavenge free radicals. In this work, the performance of a hydrogel enriched with antioxidant compounds isolated from saffron crocus (Crocus sativus L.) petals was tested. These hydrogels could be considered as new drug delivery system. Hydrogels are crosslinked polymer networks that absorb large quantities of water but retain the properties of a solid, thus making ideal dressings for sensitive skin. We tested antioxidant-enriched hydrogels on primary mouse fibroblasts...
February 1, 2018: Skin Pharmacology and Physiology
Jürgen Lademann, Fanny Knorr, Alexa Patzelt, Martina C Meinke, Heike Richter, Jean Krutmann, Eckart Rühl, Olivier Doucet
BACKGROUND/AIMS: Airborne pollutants, such as nano-sized soot particles, are increasingly being released into the environment as a result of growing population densities and industrialization. They can absorb organic and metal compounds with potential biological activity, such as polycyclic aromatic hydrocarbons and airborne pollen allergens. Local and systemic toxicities may be induced in the skin if the particulates release their harmful components upon dermal contact. METHODS: In the present study, skin pretreatments with serum and/or shield as barrier formulations prior to exposure and washing with a cleanser subsequent to exposure were evaluated as a protection and decontamination strategy using laser scanning microscopy...
January 20, 2018: Skin Pharmacology and Physiology
Ana R Fernandes, Ana C Santos, Elena Sanchez-Lopez, Andjekla B Kovačević, Marta Espina, Ana C Calpena, Francisco J Veiga, Maria L Garcia, Eliana B Souto
Neoplastic skin lesions are multifocal, diffuse skin infiltrations of particular relevance in the differential diagnosis of ulcerative, nodular, or crusting skin lesions. Nonmelanoma skin cancers (NMSCs), namely, basal cell carcinoma (BCC), squamous cell carcinoma (SCC), and also actinic keratosis (AK), are the most common malignant tumors in humans. BCCs do not proliferate rapidly and most of the times do not metastasize, while SCCs are more infiltrative, metastatic, and destructive. AKs are precursor lesions of cutaneous SCCs...
December 21, 2017: Skin Pharmacology and Physiology
Axel Kramer, Joachim Dissemond, Simon Kim, Christian Willy, Dieter Mayer, Roald Papke, Felix Tuchmann, Ojan Assadian
Wound antisepsis has undergone a renaissance due to the introduction of highly effective wound-compatible antimicrobial agents and the spread of multidrug-resistant organisms (MDROs). However, a strict indication must be set for the application of these agents. An infected or critically colonized wound must be treated antiseptically. In addition, systemic antibiotic therapy is required in case the infection spreads. If applied preventively, the Wounds-at-Risk Score allows an assessment of the risk for infection and thus appropriateness of the indication...
December 21, 2017: Skin Pharmacology and Physiology
Meenakshi Umar, Konduru S Sastry, Fatima Al Ali, Moza Al-Khulaifi, Ena Wang, Aouatef I Chouchane
BACKGROUND: Vitamin D is a secosteroid, which was initially known for its skeletal role; however, in recent years, its functions in different organs have been increasingly recognized. In this review, we will provide an overview of vitamin D functions in the skin physiology with specific focus on its role in certain inflammatory skin conditions such as psoriasis and atopic dermatitis. METHODS: A comprehensive literature search was carried out in PubMed and Google Scholar databases using keywords like "vitamin D," "skin," "atopic dermatitis," and "psoriasis...
2018: Skin Pharmacology and Physiology
Iga Hołyńska-Iwan, Inga Dziembowska, Paulina Smyk, Magdalena Lampka, Dorota Olszewska-Słonina
Acute, adverse skin effects to capsaicin can be activated by inhibition of sodium transport not only in nociceptive neurons, but also in keratinocytes. The aim of the current study was to describe and compare immediate (15 s) and prolonged (30 min) effects of capsaicin on epidermal (not neural) sodium transport using a rabbit skin model. Skin fragments (n = 169) were incubated in 4 conditions: undisturbed ion transport (U; n = 48); inhibited sodium transport (INa; n = 34) with amiloride used as sodium transport blocker; long-term irritation by capsaicin with undisturbed ion transport (CAPSA-U; n = 43) and with inhibited sodium transport (CAPSA-INa; n = 35)...
November 8, 2017: Skin Pharmacology and Physiology
Eleonora Bassino, Franco Gasparri, Luca Munaron
BACKGROUND: Acne vulgaris is a common skin defect, usually occurring during adolescence, but often it can persist in adults leaving permanent face scarring. Acne is usually treated with topical drugs, oral antibiotics, retinoids, and hormonal therapies, but medicinal plants are increasingly employed. OBJECTIVE: To investigate the protective role of white willow bark (WWB) and 1,2-decanediol (DD) on the damage caused by lipopolysaccharides (LPS) on human adult keratinocytes (HaCaT)...
November 8, 2017: Skin Pharmacology and Physiology
Newton Andréo-Filho, Antonio Vinicius Kosiski Bim, Telma Mary Kaneko, Nidia Ayumi Kitice, Isha N Haridass, Eman Abd, Patricia Santos Lopes, Sachin S Thakur, Harendra S Parekh, Michael S Roberts, Jeffrey E Grice, Heather A E Benson, Vânia Rodrigues Leite-Silva
The use of sunscreen products is widely promoted by schools, government agencies, and health-related organizations to minimize sunburn and skin damage. In this study, we developed stable solid lipid nanoparticles (SLNs) containing the chemical UV filter octyl methoxycinnamate (OMC). In parallel, we produced similar stable SLNs in which 20% of the OMC content was replaced by the botanical urucum oil. When these SLNs were applied to the skin of human volunteers, no changes in fluorescence lifetimes or redox ratios of the endogenous skin fluorophores were seen, suggesting that the formulations did not induce toxic responses in the skin...
November 4, 2017: Skin Pharmacology and Physiology
Clemens Painsi, Alexander Hirtenfelder, Bernhard Lange-Asschenfeldt, Franz Quehenberger, Peter Wolf
Periodontitis and psoriasis are suggested to be co-occurring, chronic inflammatory conditions with overlapping characteristics. However, respective evidence is rare and data on risk factors of periodontitis in psoriasis patients are minimal. The aim of this study was to expand the evidence of psoriasis-associated periodontitis and establish a potential risk profile for periodontitis. In total, data from 209 exacerbated psoriasis patients were retrospectively analyzed on recordings of periodontitis and compared with those of 91 patients with chronic spontaneous urticaria (CSU)...
November 2, 2017: Skin Pharmacology and Physiology
Yue Zheng, Qingfang Xu, Yating Peng, Zijian Gong, Haiyan Chen, Wei Lai, Howard I Maibach
BACKGROUND: Long noncoding RNA (lncRNA) are differentially expressed across stages of differentiation and development, but the role of lncRNA in human skin photoaging mechanisms remains poorly understood. OBJECTIVE: This study aimed to determine lncRNA expression changes in human dermal fibroblasts (HDF) induced by repeated UVA irradiation and to explore correlations between lncRNA and skin photoaging prognosis. METHODS: In the UVA-HDF group, HDF were subjected to repeated UVA irradiation (10 J/cm2 UVA twice daily for 7 days); in the control group, HDF received no irradiation...
October 26, 2017: Skin Pharmacology and Physiology
Rachita Dhurat, Jill Chitallia, Theodor W May, Ammani M Jayaraaman, Jithendriya Madhukara, Subbu Anandan, Pradyumna Vaidya, Adolf Klenk
BACKGROUND: Androgenetic alopecia is a condition with a high prevalence worldwide and affects both males and females. Currently, only 2 approved treatments exist: finasteride (males only) and minoxidil 2 or 5% solution (males and females). METHODS: We conducted a randomized, open-label, multicenter noninferiority study to determine whether a caffeine-based 0.2% topical liquid would be no less effective than minoxidil 5% solution in males (n = 210) with androgenetic alopecia...
October 21, 2017: Skin Pharmacology and Physiology
Sabina C A Hanssen, Anke G M Hendriks, Romy M C Keijsers, Piet E J van Erp, Carine J M van der Vleuten, Marieke M B Seyger, Peter C M van de Kerkhof
BACKGROUND: Vascular changes, both endothelial and functional, are crucial events in inflammatory responses. OBJECTIVES: To investigate the dynamics of endothelial cell (EC) and functional changes during acute inflammation in an in vivo model of the skin using leukotriene B4. METHODS: EC proliferation, vascular network size, vessel diameter (VD), and hypoxia-inducible factor (HIF)-1α were studied by immunohistochemical CD31/Ki67 double staining and single staining of HIF-1α...
October 20, 2017: Skin Pharmacology and Physiology
Theresa Fürtjes, Katharina T Weiss, Alexander Filbry, Frank Rippke, Stephan Schreml
BACKGROUND: Human skin surface has a physiologically acidic pH (pHss). In cases of increased pHss, the acidity of the skin can be restored by topical formulations. We tested a pH 5 oil-in-water (O/W) emulsion for pHss regeneration and stabilization. METHODS: We performed 2 experiments with 10 female study subjects in each. In both experiments, 2D imaging with luminescent sensor foils was used to determine pHss. Alkalization was reached by washing the volar forearm with a soap bar and warm running tap water for 20 min...
October 4, 2017: Skin Pharmacology and Physiology
Milena Werner, Marianne Herling, Birgit Garbe, Carmen Theek, Hagen Tronnier, Ulrike Heinrich, Nicole Braun
BACKGROUND: Today, the sun protection factor (SPF) value of sunscreen products is determined in vivo with a standardized protocol (EN ISO 24444:2010), and the measured SPF biological end point is the visible skin erythema. However, many of the sunscreen products currently available on the market have antiphlogistic ingredients, which may potentially result in an overestimated SPF of the sunscreen. AIMS: To investigate the potential influence of the antiphlogistic ingredients panthenol and bisabolol in sunscreens on the determined SPF value in vivo...
October 4, 2017: Skin Pharmacology and Physiology
Lleucu B Davies, Christopher Gateley, Phillip Holland, Siôn A Coulman, James C Birchall
BACKGROUND/AIMS: Topical anaesthetics reduce pain during venous access procedures in children. However, clinical use is hindered by a significant anaesthetic onset time. Restricted diffusion of the topical anaesthetic through the stratum corneum barrier is the principal reason for the delayed onset. Microneedles can painlessly pierce the skin. This study evaluated microneedle pre-treatment of ex vivo human skin as a means to increase the rate of tetracaine permeation, in order to accelerate the onset of anaesthesia...
September 8, 2017: Skin Pharmacology and Physiology
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2017: Skin Pharmacology and Physiology
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