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https://www.readbyqxmd.com/read/28815267/long-term-trend-in-sunscreen-use-among-beachgoers-in-denmark
#1
Ida M Heerfordt, Peter A Philipsen, Bettina Ø Larsen, Hans Christian Wulf
This observational study examined the trend from the 1990s to 2016 of sunscreen use, sun protection factor (SPF) and quantity of sunscreen applied amongst beachgoers in Denmark. In 1997, 1998, 1999 and 2016, a total of 1,306 beachgoers were asked if they had used sunscreen on a specific day and, if so, of what SPF. In 1992 and 2016 another 143 beachgoers had their sunscreen bottles weighed before and after application. The frequency of sunscreen use among women increased from 45% in 1997 to 78% in 2016, while frequency of use among men increased from 39% to 49%...
August 17, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28813401/skinlike-sunscreen
#2
Matthew Sedacca
No abstract text is available yet for this article.
August 15, 2017: Scientific American
https://www.readbyqxmd.com/read/28812776/labelled-sunscreen-spfs-may-overestimate-protection-in-natural-sunlight
#3
Brian Diffey, Uli Osterwalder
Limited evidence exists to indicate that sunscreen protection factors determined in the laboratory are higher than those in natural sunlight. In this article we propose an explanation for this difference and estimate the expected SPFs of sunscreen products in natural sunlight and those expected from laboratory testing. Our results indicate that the labelled SPF, determined by in vivo assay using a UV solar simulator, overestimates the SPF that would be expected in natural sunlight to the extent that for products labelled SPF50+, it may not be possible to achieve a protection against sunlight of more than 25-fold...
August 16, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28811301/topically-applied-carvedilol-attenuates-solar-ultraviolet-radiation-induced-skin-carcinogenesis
#4
Kevin M Huang, Sherry Liang, Steven Yeung, Etuajie Oiyemhonlan, Kristan H Cleveland, Cyrus Parsa, Robert Orlando, Frank L Meyskens, Bradley Andresen, Ying Huang
In previous studies, the β-blocker carvedilol inhibited EGF-induced epidermal cell transformation and chemical carcinogen-induced mouse skin hyperplasia. As exposure to ultraviolet (UV) radiation leads to skin cancer, the present study examined whether carvedilol can prevent UV-induced carcinogenesis. Carvedilol absorbs UV like a sunscreen; thus, to separate pharmacological from sunscreen effects, 4-hydroxycarbazole (4-OHC), which absorbs UV to the same degree as carvedilol, served as control. JB6 P+ cells, an established epidermal model for studying tumor promotion, were used for evaluating the effect of carvedilol on UV-induced neoplastic transformation...
August 15, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/28805937/new-data-on-hyperpigmentation-disorders
#5
REVIEW
S Schalka
Recently visible light (VL) and vascularization triggered by infrared light (IR) play a role in hyperpigmentation disorders of the skin. The aim of this article is to provide an update on the aetiology of hyperpigmentation disorders and means of prevention against UV, visible (VL) and infrared light (IR). The author conducted a literature review of the most recent data about hyperpigmentation disorders and means of prevention and protection. VL impacts on pigmentation, especially in individuals with phototype III, IV or V and also causes the production of Reactive Oxygen Species (ROS), erythema and DNA damage through ROS production as well as photodermatoses...
September 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28804653/college-students-perceptions-of-worry-and-parent-beliefs-associations-with-behaviors-to-prevent-sun-exposure
#6
Robert A Yockey, Laura A Nabors, Oladunni Oluwoye, Kristen Welker, Angelica M Hardee
More research is needed to understand how attitudes impact behaviors that afford sun protection. The current study examined the impact of students' perceptions of parental beliefs about sun exposure and its influence on their practiced sun protection behaviors and worry about sun exposure. Participants were college students (N = 462) at a large Midwestern university. They completed a survey to examine their perceptions of risks and messages about sun exposure and sun exposure behaviors. Results indicated that gender and students' perceptions of parental beliefs about sun exposure were related to sun protection behaviors and their own worry over sun exposure...
2017: Journal of Skin Cancer
https://www.readbyqxmd.com/read/28798318/sunscreen-products-impair-the-early-developmental-stages-of-the-sea-urchin-paracentrotus-lividus
#7
Cinzia Corinaldesi, Elisabetta Damiani, Francesca Marcellini, Carla Falugi, Luca Tiano, Francesca Brugè, Roberto Danovaro
Marine ecosystems are increasingly threatened by the release of personal care products. Among them, sunscreens are causing concern either for the effects on skin protection from UV radiation and for the potential impacts on marine life. Here, we assessed the UVA protective efficacy of three sunscreens on human dermal fibroblasts, including two common products in Europe and USA, and an eco-friendly product. The sunscreens' effects were also tested on Paracentrotus lividus, a marine species possibly threatened by these contaminants...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28774608/occurrence-and-formation-of-disinfection-by-products-in-the-swimming-pool-environment-a-critical-review
#8
REVIEW
Rhys A A Carter, Cynthia A Joll
Disinfection of water for human use is essential to protect against microbial disease; however, disinfection also leads to formation of disinfection by-products (DBPs), some of which are of health concern. From a chemical perspective, swimming pools are a complex matrix, with continual addition of a wide range of natural and anthropogenic chemicals via filling waters, disinfectant addition, pharmaceuticals and personal care products and human body excretions. Natural organic matter, trace amounts of DBPs and chlorine or chloramines may be introduced by the filling water, which is commonly disinfected distributed drinking water...
August 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28767160/sunscreen-creams-containing-naringenin-nanoparticles-formulation-development-and-in-vitro-and-in-vivo-evaluations
#9
Haritima Joshi, Aswathi R Hegde, Pallavi K Shetty, Hemanth Gollavilli, Renuka S Managuli, Guruprasad Kalthur, Srinivas Mutalik
BACKGROUND: The aim of this study was to develop sunscreen creams containing polymeric nanoparticles (NPs) of naringenin for photo-protective and antioxidant effects. METHODS: Polymeric NPs of naringenin were prepared and optimized. The NPs were incorporated into sunscreen creams and evaluated for in vitro and in vivo skin retention. RESULTS: The optimized naringenin NPs showed a size of 131.2 nm, zeta potential -25.4 mV and entrapment efficiency 32...
August 2, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/28766797/allergic-contact-dermatitis-caused-by-benzoic-acid-and-lauryl-glucoside-in-a-sunscreen
#10
María I Martínez-González, Ricardo González-Pérez, Irene García-Rio, Sonia Heras-González
No abstract text is available yet for this article.
September 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28752269/opportunities-for-skin-cancer-prevention-education-among-individuals-attending-a-community-skin-cancer-screening-in-a-high-risk-catchment-area
#11
Bridget Grahmann Parsons, Lisa H Gren, Sara E Simonsen, Garrett Harding, Douglas Grossman, Yelena P Wu
Despite the highly preventable nature of skin cancer, it remains the most commonly diagnosed form of cancer in the United States. Recommendations for a complete skin cancer prevention regimen include engaging in photoprotection (e.g., sunscreen use), avoiding skin cancer risk behaviors (e.g., tanning), and receiving total body skin exams from a health care provider. The current study examined reported engagement in these behaviors among participants attending a community skin cancer screening (N = 319) in a high-risk catchment area to assess the need for increased health education on skin cancer prevention...
July 27, 2017: Journal of Community Health
https://www.readbyqxmd.com/read/28750320/cellular-mycosporine-like-amino-acids-protect-photosystem-ii-of-the-dinoflagellate-scrippsiella-sweeneyae-from-ultraviolet-radiation-damage
#12
Hitomi Taira, Satoru Taguchi
Photo-damage to photosystem II (PSII) from ultraviolet radiation (UVR) was determined using chlorophyll fluorescence in relation to sunscreen factors on the dinoflagellate Scrippsiella sweeneyae based on the cellular mycosporine-like amino acid contents (CMAAs, cell) and cell diameter (=light path, d). Three different CMAAs, cell were prepared by acclimating cells to three levels (30.8, 15.2, and 7.7Wm(-2)) of photosynthetically active radiation (PAR). PAR-acclimated cells were exposed to PAR (0.64Wm(-2))+UVR (3...
July 19, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28749499/elucidating-nuclear-motions-in-a-plant-sunscreen-during-photoisomerization-through-solvent-viscosity-effects
#13
M D Horbury, W-D Quan, A L Flourat, F Allais, V G Stavros
We explore the effects of solvent viscosity on the trans-cis photoisomerization of sinapoyl malate, which is utilized as a sunscreen molecule in plants. Our results demonstrate that viscosity has a significant effect on the timescale for isomerization, providing insight into the nuclear motions involved. The ramifications of these findings are discussed with reference to sinapoyl malate's in vivo photoprotection properties.
August 9, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28742490/observing-and-understanding-the-ultrafast-photochemistry-in-small-molecules-applications-to-sunscreens
#14
Lewis A Baker, Vasilios G Stavros
In this review, we discuss the importance of biological and artificial photoprotection against overexposure to harmful ultraviolet radiation. Transient electronic and transient vibrational absorption spectroscopies are highlighted as important tools in understanding the energy transfer in small molecules, with a focus on the application to commercial sunscreens with representative examples given. Oxybenzone, a common ingredient in commercial sunscreens and sinapoyl malate, a biological sunscreen in plant leaves are presented as case studies...
September 1, 2016: Science Progress
https://www.readbyqxmd.com/read/28741846/confinement-of-reactive-oxygen-species-in-artificial-enzyme-based-hollow-structure-for-eliminating-photocatalytic-adverse-effect-of-uv-filters
#15
Enguo Ju, Kai Dong, Zhenzhen Wang, Yan Zhang, Fangfang Cao, Zhaowei Chen, Fang Pu, Jinsong Ren, Xiaogang Qu
Skin cancers caused by UV irradiation have been a major public health problem. One simple and effective way to avoid the above detrimental effects is the use of UV-protective sunscreens. However, there has been considerable concern with the issue of production of reactive oxygen species by the photo-degradation of commercial UV filters. Herein, we reported for the first time that the integration of ZnO nanoparticles and CeOx nanoparticles into hollow microspheres (ZnO/CeOx HMS) could provide broad UV spectrum protection and scavenge generated ROS under UV irradiation...
July 25, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28739147/probabilistic-exposure-assessment-of-sun-care-products
#16
M P Gomez-Berrada, A S Ficheux, S Rakotomalala, A C Roudot, P J Ferret
The aim of this study has been to assess the consumption and the exposure to 6 types of sun care products: sunscreen cream, sunscreen milk, sunscreen spray, sunscreen stick, moisturizing cream with SPF and after-sun milk. Consumption data were obtained from 75 clinical safety studies conducted on 3001 subjects: 371 children aged 3-9, 149 children aged 10-14 and 2481 adults aged more than 15. Exposure was assessed using a probabilistic method. Strength of the study include stratification of consumption and exposure data according to sex and age, as well as other important points such as the galenic form, the site of application and the value of the sun protection factor...
July 21, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28735741/apigenin-prevents-ultraviolet-b-radiation-induced-cyclobutane-pyrimidine-dimers-formation-in-human-dermal-fibroblasts
#17
S Mary Britto, D Shanthakumari, B Agilan, T Radhiga, G Kanimozhi, N Rajendra Prasad
Exposure to solar ultraviolet-B (UVB) radiation leads to the formation of cyclobutane pyrimidine dimers (CPDs). We investigated the protective effect of apigenin against UVB-induced CPDs formation in human dermal fibroblasts cells (HDFa). For this purpose, HDFa cells were treated with apigenin (15μM) prior to UVB irradiation (20mJ/cm(2)); DNA damage and subsequent molecular end points were observed. Exposure to UVB radiation increased significant CPDs formation in HDFa cells and the frequencies of CPDs were reduced by treatment with apigenin (15μM)...
September 2017: Mutation Research
https://www.readbyqxmd.com/read/28732717/counseling-about-skin-cancer-prevention-among-adolescents-what-do-parents-receive-from-health-care-providers
#18
Annie-Laurie McRee, Darren Mays, Melanie L Kornides, Melissa B Gilkey
PURPOSE: Adolescence is a high-risk period for ultraviolet radiation exposure, a primary cause of skin cancer later in life. We sought to characterize receipt of health care provider-delivered counseling about skin cancer prevention (SCP) among parents of adolescents. METHODS: In 2016, we conducted an online survey with a national sample of parents of adolescents aged 11-17 years (n = 1,253). Multivariable logistic regression assessed correlates of receiving counseling from a health care provider about any of the six skin cancer prevention (SCP) topics...
July 18, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28718005/sunscreens-block-cutaneous-vitamin-d-production-with-only-a-minimal-effect-on-circulating-25-hydroxyvitamin-d
#19
Florence Libon, Justine Courtois, Caroline Le Goff, Pierre Lukas, Neus Fabregat-Cabello, Laurence Seidel, Etienne Cavalier, Arjen F Nikkels
A 50+ SPF sunscreen decreased significantly cutaneous vitamin D production following a single narrow-band (nb)UVB exposure, independently from the body surface area exposed. In contrast, the circulating 25(OH)D3 levels were only minimally affected. It is probable that another endogenous source of precursors is selected when skin-originated precursors are lacking. PURPOSE: Sunscreen use, highly advocated for preventing cutaneous carcinogenesis, is potentially leading to an aggravation of vitamin D deficiency with its consequences on bone health...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28715765/impact-of-coated-tio2-nanoparticles-used-in-sunscreens-on-two-representative-strains-of-the-human-microbiota-effect-of-the-particle-surface-nature-and-aging
#20
Laura Rowenczyk, Cécile Duclairoir-Poc, Magalie Barreau, Céline Picard, Nicolas Hucher, Nicole Orange, Michel Grisel, Marc Feuilloley
The impact of two differently coated TiO2-nanoparticles (NPs) was evaluated on two representative bacteria from the cutaneous microbiota (Staphylococcus aureus and Pseudomonas fluorescens) in conditions of use. Particles were coated in order to exhibit either hydrophilic or hydrophobic behavior. A first exposure scenario within some fresh/aged model emulsions was developed in order to measure both the impact of the NPs presence and their surface nature during the emulsions conservation. Thanks to this protocol, it was demonstrated that, during aging, the hydrophobic NPs modified the physicochemical characteristics of the emulsions, such as the pH or the colloids sizes, and favored the development of potential pathogenic bacteria...
July 8, 2017: Colloids and Surfaces. B, Biointerfaces
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