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Vitamin D skin

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https://www.readbyqxmd.com/read/28432394/-vitamin%C3%A2-d-and-uv-protection
#1
REVIEW
H Stege, T Schwarz
A high percentage of people present with reduced vitamin D3 levels. Reduced vitamin D3 levels have to be supplemented. Oral supplementation can be performed easily and without significant side effects. Because vitamin D3 can be produced in the skin via ultraviolet B (UVB) irradiation, it is possible to elevate reduced vitamin D3 levels by UVB exposure. However, UVB, which is classified as a complete carcinogen, induces skin cancer. Therefore, UVB irradiation should not be utilized to stimulate vitamin D3 synthesis...
April 21, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28431446/-vitamin-d-in-clinic-and-practice
#2
Armin Zittermann, Stefan Pilz
Vitamin D is unique among the vitamins, since its major source is skin synthesis by solar UVB exposure, whereas dietary intake plays only a minor role. In the general population, cutaneous vitamin D synthesis is clearly below the recommended amount. Dietary vitamin D does not fill this gap. Severe vitamin D deficiency results in rickets in infants and osteomalacia in adults. In the absence of endogenous vitamin D synthesis (e. g. during winter), oral supplements should ensure adequate daily vitamin D intake, where appropriate...
April 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28429905/maintenance-vitamin-d3-dosage-requirements-in-chinese-women-with-post-menopausal-osteoporosis-living-in-the-tropics
#3
Yogeswari Venugopal, Sharifah F Wan Muhamad Hatta, Nurbazlin Musa, Siti Abdul Rahman, Jeyakantha Ratnasingam, Sharmila Sunita Paramasivam, Lee Ling Lim, Luqman Ibrahim, Karen Choong, Alexander Tb Tan, Karuthan Chinna, Siew Pheng Chan, Shireene R Vethakkan
BACKGROUND AND OBJECTIVES: Vitamin D3 (cholecalciferol) dose required to maintain sufficiency in non- Caucasian women with postmenopausal osteoporosis (PMO) inthe tropics has not been well studied. Some guidelines mandate 800-1000 IU vitamin D/day but the Endocrine Society (US) advocates 1500-2000 IU/day to maintain 25-hydroxyvitamin-D (25(OH)D) concentration at >75 nmol/L. We aimed to establish oral cholecalciferol dose required to maintain 25(OH)D concentration at >75 nmol/L in PMO Chinese Malaysian women, postulating lower dose requirements amongst light-skinned subjects in the tropics...
May 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28422993/th17-micro-milieu-regulates-nlrp1-dependent-caspase-5-activity-in-skin-autoinflammation
#4
Stephanie Zwicker, Eva Hattinger, Daniela Bureik, Aleksandra Batycka-Baran, Andreas Schmidt, Peter-Arne Gerber, Simon Rothenfusser, Michel Gilliet, Thomas Ruzicka, Ronald Wolf
IL-1β is a potent player in cutaneous inflammation and central for the development of a Th17 micro-milieu in autoinflammatory diseases including psoriasis. Its production is controlled at the transcriptional level and by subsequent posttranslational processing via inflammatory caspases. In this study, we detected inflammatory caspase-5 active in epidermal keratinocytes and in psoriatic skin lesions. Further, interferon-γ and interleukin-17A synergistically induced caspase-5 expression in cultured keratinocytes, which was dependent on the antimicrobial peptide psoriasin (S100A7)...
2017: PloS One
https://www.readbyqxmd.com/read/28421711/vitamin-d-status-of-white-pregnant-women-and-infants-at-birth-and-4%C3%A2-months-in-north-west-england-a-cohort-study
#5
A J B Emmerson, K Dockery, M Z Mughal, S A Roberts, C L Tower, J L Berry
The prevalence of vitamin D deficiency in pregnant white-skinned women (WSW) and their infants has not been investigated at northern latitudes in a developed county. A 2-year observational cohort study was undertaken in the North West of England to determine 25-hydroxyvitamin D (25OHD) levels in WSW and their infants during pregnancy and 4 months postdelivery and to explore factors associated with these levels. Nutritional and lifestyle questionnaires were completed and 25OHD levels measured at 28 weeks and 4 months postdelivery...
April 18, 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/28401345/vitamin-d-in-european-children-statement-from-the-european-academy-of-paediatrics-eap
#6
Zachi Grossman, Adamos Hadjipanayis, Tom Stiris, Stefano Del Torso, Jean-Christophe Mercier, Arunas Valiulis, Raanan Shamir
Vitamin D is synthesized in human skin upon sun exposure and is also a nutrient. It regulates calcium and phosphate metabolism and is essential for the maintenance of bone health. Vitamin D supplementation during infancy, in order to prevent rickets, is universally accepted. Many human cell types carry vitamin D receptor, this being a drive for conducting studies on the possible association between vitamin D status and other diseases. Studies have affirmed that a considerable number of healthy European children may be vitamin D deficient, especially in high-risk groups (darker pigmented skin, living in areas with reduced sun exposure and other disorders)...
April 12, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28394766/risks-and-benefits-of-swaddling-healthy-infants-an-integrative-review
#7
Antonia M Nelson
BACKGROUND: Swaddling has been practiced since antiquity; however, there is controversy about its safety. OBJECTIVES: The purpose of this review is to update and build upon previous reviews and synthesize evidence on risks and benefits of swaddling in healthyterm, near-term, or older infants. DATA SOURCES: MEDLINE (1960-May 13, 2016) and CINAHL (1963-May 13, 2016) searches were conducted, relevant articles retrieved, and citation lists reviewed for other references...
April 7, 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/28368538/combined-deletion-of-the-vitamin-d-receptor-and-calcium-sensing-receptor-delays-wound-re-epithelialization
#8
Yuko Oda, Lizhi Hu, Thai Nguyen, Chak Fong, Chia-Ling Tu, Daniel D Bikle
When the skin is injured, keratinocytes proliferate, migrate, and differentiate to regenerate the epidermis. We recently showed that ablation of the vitamin D receptor (Vdr) in keratinocytes delays wound re-epithelialization in mice also fed a low calcium diet, implicating a cooperative role of Vdr and calcium signaling in this process. In this study we examined the role of vitamin D and calcium signaling in wound healing by deleting their receptors, Vdr and the calcium sensing receptor (Casr). Gene expression profiling of neonatal epidermis lacking both Vdr and Casr (DKO) specifically in keratinocytes revealed that DKO affects a number of pathways relevant to wound healing including Vdr, β-catenin and adherens junction signaling...
March 22, 2017: Endocrinology
https://www.readbyqxmd.com/read/28361440/acid-suppressive-therapy-and-risk-of-infections-pros-and-cons
#9
REVIEW
Leon Fisher, Alexander Fisher
This narrative review summarises the benefits, risks and appropriate use of acid-suppressing drugs (ASDs), proton pump inhibitors and histamine-2 receptor antagonists, advocating a rationale balanced and individualised approach aimed to minimise any serious adverse consequences. It focuses on current controversies on the potential of ASDs to contribute to infections-bacterial, parasitic, fungal, protozoan and viral, particularly in the elderly, comprehensively and critically discusses the growing body of observational literature linking ASD use to a variety of enteric, respiratory, skin and systemic infectious diseases and complications (Clostridium difficile diarrhoea, pneumonia, spontaneous bacterial peritonitis, septicaemia and other)...
March 30, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28358908/pharmacogenomics-study-on-cadherin-2-network-with-regard-to-hiv-infection-and-methadone-treatment-outcome
#10
Hsiang-Wei Kuo, Chia-Lung Shih, Jieh-Hen Tsung, Sheng-Wen Liu, Shih-Kai Chu, Hsin-Chou Yang, Hsiao-Hui Tsou, Zih-Hsiang Wang, Andrew C H Chen, Yu-Li Liu
Heroin dependent patients have a high incidence of HIV infection. In contrast to the gene expression method, we developed a systemic correlation analysis method built upon the results of pharmacogenomics study in a methadone maintenance treatment (MMT) cohort consisting of 344 Taiwanese heroin dependent patients. We identified genetic variants and their encoding proteins that may be involved with HIV infection and MMT treatment outcome. Cadherin 2 (CDH2) genetic determinants were identified through the genome-wide pharmacogenomic study...
2017: PloS One
https://www.readbyqxmd.com/read/28353072/changes-in-plasma-concentrations-of-25-hydroxyvitamin-d-and-1-25-dihydroxyvitamin-d-during-pregnancy-a-brazilian-cohort
#11
Amanda C Cunha Figueiredo, Paula Guedes Cocate, Amanda R Amorim Adegboye, Ana Beatriz Franco-Sena, Dayana R Farias, Maria Beatriz Trindade de Castro, Alex Brito, Lindsay H Allen, Rana R Mokhtar, Michael F Holick, Gilberto Kac
PURPOSE: To characterize the physiological changes in 25-hydroxyvitamin D [25(OH)D] and 1,25-dihydroxyvitamin D [1,25(OH)2D] throughout pregnancy. METHODS: Prospective cohort of 229 apparently healthy pregnant women followed at 5th-13th, 20th-26th, and 30th-36th gestational weeks. 25(OH)D and 1,25(OH)2D concentrations were measured by LC-MS/MS. Statistical analyses included longitudinal linear mixed-effects models adjusted for parity, season, education, self-reported skin color, and pre-pregnancy BMI...
March 28, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28350929/effect-of-vitamin-d-and-calcium-supplementation-on-cancer-incidence-in-older-women-a-randomized-clinical-trial
#12
RANDOMIZED CONTROLLED TRIAL
Joan Lappe, Patrice Watson, Dianne Travers-Gustafson, Robert Recker, Cedric Garland, Edward Gorham, Keith Baggerly, Sharon L McDonnell
Importance: Evidence suggests that low vitamin D status may increase the risk of cancer. Objective: To determine if dietary supplementation with vitamin D3 and calcium reduces the risk of cancer among older women. Design, Setting, and Participants: A 4-year, double-blind, placebo-controlled, population-based randomized clinical trial in 31 rural counties (June 24, 2009, to August 26, 2015-the final date of follow-up). A total of 2303 healthy postmenopausal women 55 years or older were randomized, 1156 to the treatment group and 1147 to the placebo group...
March 28, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28346700/vitamin-d-status-in-wild-toque-macaques-macaca-sinica-in-sri-lanka
#13
Michael L Power, Wolfgang P J Dittus
The vitamin D receptor is found on most cells, including active immune cells, implying that vitamin D has important biological functions beyond calcium metabolism and bone health. Although captive primates should be given a dietary source of vitamin D, under free-living conditions vitamin D is not a required nutrient, but rather is produced in skin when exposed to UV-B light. The circulating level of 25 hydroxyvitamin D (25-OH-D) considered adequate for humans is a topic of current controversy. Levels of circulating 25-OH-D sufficient for good health for macaques and other Old World anthropoids are assumed to be the same as human values, but data from free-living animals are scant...
March 27, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28345527/prevalence-and-factors-promoting-the-occurrence-of-vitamin-d-deficiency-in-the-elderly
#14
Magdalena Wyskida, Katarzyna Wieczorowska-Tobis, Jerzy Chudek
Vitamin D deficiency affects a large part of the population of elderly people, especially women, who live in moderate climate countries due to a reduced amount of vitamin D in the diet (small sea fish consumption) and reduced content of 7-dehydrocholesterol, which causes decreased skin synthesis. The lowest seasonal concentration of 25(OH)D3 is usually observed during winter and spring. Sun exposure influences 25(OH)D3 concentration more strongly in men than in women. Sociodemographic factors that increase the risk of vitamin D deficiency in the elderly include poor environmental conditions, low economic status, lower educational level, drug exposure (smoking), reduced physical activity, overall poor health and obesity, which causes reduced skin exposure to sunlight...
March 13, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28343910/anti-skin-aging-effect-of-epigallocatechin-gallate-by-regulating-epidermal-growth-factor-receptor-pathway-on-aging-mouse-model-induced-by-d-galactose
#15
Jiming Chen, Yifan Li, Qiangqiang Zhu, Tong Li, Hao Lu, Nan Wei, Yewei Huang, Ruoyu Shi, Xiao Ma, Xuanjun Wang, Jun Sheng
Epigallocatechin gallate(EGCG) is a monomer separated from tea catechins, as an well-known antioxidant, which helps fight wrinkles and rejuvenate skin cells. In this study, we investigated the anti-aging effect of EGCG, and to clarify underlying mechanism of skin aging in a d-galactose-induced aging mouse model. Forty-five male mice were divided into 5 groups and treated with different dose of EGCG, Vitamin C (VitC) to mice as a positive control. All groups except vehicle were established aging model induced by d-galactose (200mg/kg/day) that was subcutaneously injected to mice for 8 weeks...
March 24, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28331054/ambient-uvb-dose-and-sun-enjoyment-are-important-predictors-of-vitamin-d-status-in-an-older-population
#16
Fiona O'Sullivan, Eamon Laird, Dervla Kelly, Jos van Geffen, Michiel van Weele, Helene McNulty, Leane Hoey, Martin Healy, Kevin McCarroll, Conal Cunningham, Miriam Casey, Mary Ward, J J Strain, Anne M Molloy, Lina Zgaga
Background: UVB-induced skin synthesis is considered the key source of vitamin D, yet exposure to UVB is poorly accounted for in epidemiological studies.Objectives: The aim of this study was to examine the association of serum 25-hydroxyvitamin D [25(OH)D] concentration with accurately measured ambient UVB dose, sun enjoyment, supplements, and other factors.Methods: An all-Irish cohort of community-dwelling participants aged >60 y [median age: 73; 67% female; median 25(OH)D: 54.5 nmol/L] was used. Participants from this large, cross-sectional study completed a questionnaire to provide information on demographic factors and lifestyle (including supplement use and sun enjoyment)...
March 22, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28329672/vitamin-d-and-skin-aging
#17
Merel A Hamer, Raymond Noordam, Luba M Pardo, Diana Van Heemst, David A Gunn, Tamar Nijsten
BackgroundThe relationship between 25-hydroxyvitamin D and different phenotypes of skin aging (e.g., wrinkles, pigmented spots, telangiectasia, perceived age) is unclear. We investigated the association between vitamin D levels and skin aging phenotypes in middle-aged participants from the Rotterdam Study (RS) and Leiden Longevity Study (LLS).MethodsStandardized facial photographs were taken of North-European participants from the RS (N=3,831; 58.2% female, median age 66.5) and the LLS (N=661; 50.5% female, median age 63...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329635/compliance-with-indoor-tanning-laws-for-minors-among-salons-and-business-in-the-united-states
#18
Courtney Choy, Brenda Cartmel, Rachel Clare, Leah M Ferrucci
Indoor tanning is an established risk factor for skin cancer, yet indoor tanning is quite common among adolescents. Laws exists in some states to limit access to indoor tanning by minors, but there is limited research on industry compliance with these laws.We conducted a telephone survey with a random sample of businesses (n=412) offering indoor tanning in the 14 states with indoor tanning bans for minors as of May 2015. Female research assistants posing as minors conducted telephone interviews with employees using a standardized script...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329465/youtube-as-a-source-of-health-information-analysis-of-sun-protection-and-skin-cancer-prevention-related-issues
#19
Linda Ruppert, Brian Køster, Anna Maria Siegert, Christian Cop, Lindsay Boyers, Chante Karimkhani, Helena Winston, Jessica Mounessa, Robert P Dellavalle, Daphne Reinau, Thomas Diepgen, Christian Surber
Although social media ubiquitously supplementstraditional information sources such as newspapers,magazines, radio, and television, investigation of onlinehealth information related to sun protection and skincancer prevention has been scarce and largely limitedto English language sources. Using the search terms"sun protection," "sunscreen," "skin cancer prevention,"tanning bed" and "vitamin D," we investigated 281YouTube videos presented in 6 languages: English,German, French, Spanish, Swedish, and Danish. Foreach video, we used a four-sectioned checklist toassess general information, popularity, expert drivenmeasures, and heuristic driven measures...
January 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28326355/high-prevalence-of-vitamin-d-deficiency-in-2-17%C3%A2-year-olds-presenting-with-acute-fractures-in-southern-australia
#20
Dae Hwan Kwon, David Krieser, Chris Harris, Abhay Khot, Peter R Ebeling, Christine P Rodda
AIM: To determine vitamin D deficiency risk and other lifestyle factors in children aged 2-17 years presenting with an acute fracture to Sunshine Hospital. METHODS: A prospective observational study was undertaken using a convenience sample data collected from children aged 2-17 years of age presenting with an acute fracture. Recruitment was undertaken over a 3-month period from February to May 2014. Risk factors for vitamin D deficiency (skin pigmentation, hours spent outdoors, sunscreen use and obesity) were identified...
December 2016: Bone Reports
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