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Vitamin D skin

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https://www.readbyqxmd.com/read/28532201/vitamin-d-status-in-algerian-beh%C3%A3-et-s-disease-patients-an-immunomodulatory-effect-on-no-pathway
#1
Zineb Djeraba, Fatiha Benlabidi, Fatma Zohra Djaballah-Ider, Oussama Medjeber, Amina Arroul-Lammali, Houda Belguendouz, Fifi Otmani, Chafia Touil-Boukoffa
Behçet's disease (BD) is an inflammatory multisystemic disorder associated with orogenital ulcers, uveitis and skin lesions with unpredictable episodes of exacerbations and remissions. Even though several immunological and environmental factors contribute to BD progression, its ethiopathogenesis remains uncertain and elusive. Considered as one of the potent environmental factors that can increase prevalence of some autoimmune and inflammatory disorders, vitamin D deficiency has been linked to several diseases as BD...
May 22, 2017: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/28526915/dietary-behaviors-in-psoriasis-patient-reported-outcomes-from-a-u-s-national-survey
#2
Ladan Afifi, Melissa J Danesh, Kristina M Lee, Kevin Beroukhim, Benjamin Farahnik, Richard S Ahn, Di Yan, Rasnik K Singh, Mio Nakamura, John Koo, Wilson Liao
INTRODUCTION: Psoriasis patients demonstrate high interest in the role of diet on their skin condition. However, data are lacking to describe dietary interventions among psoriasis patients and associated outcomes. This study aims to identify common dietary habits, interventions and perceptions among patients with psoriasis, and to examine patient-reported skin outcomes in response to these interventions. METHODS: We administered a 61-question survey to the National Psoriasis Foundation membership asking psoriasis patients about dietary habits, modifications, skin responses, and perceptions...
May 19, 2017: Dermatology and Therapy
https://www.readbyqxmd.com/read/28526240/endocrine-actions-of-vitamin-d-in-skin-relevance-for-photocarcinogenesis-of-non-melanoma-skin-cancer-and-beyond
#3
REVIEW
Jörg Reichrath, Roman Saternus, Thomas Vogt
The skin represents a pivotal organ for the human body's vitamin D endocrine system, being both the site of ultraviolet (UV)-B-induced vitamin D synthesis and a target tissue for the pluripotent effects of 1,25(OH)2D3 and other biologically active vitamin D metabolites. As many other steroid hormones, 1,25(OH)2D3 exerts its effects via two independent signal transduction pathways: the classical genomic and the non-genomic pathway. While non-genomic effects of 1,25(OH)2D3 are in part exerted via effects on intracellular calcium, genomic effects are mediated by the vitamin D receptor (VDR)...
May 16, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28521479/association-between-non-melanoma-and-melanoma-skin-cancer-rates-vitamin-d-and-latitude
#4
Miguel Rivas, Elisa Rojas, Gloria M Calaf, Marcela Barberán, Claudio Liberman, Marcelo De Paula Correa
Vitamin D synthesis takes place in the skin due to solar ultraviolet-B (UVB) radiation. Several studies have shown the association between low sun exposure, non-melanoma skin cancer (NMSC) and a lack of vitamin D synthesis. Since such synthesis in the body depends on the exposure of the skin to solar UVB radiation (290-320 nm), experimental measurements of this type of solar radiation are important. Tarapaca University in Arica, Chile, established a solar UV radiation laboratory in 2006 and since then this laboratory has performed systematic experimental solar UVB measurements using a calibrated biometer instrument...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28477263/photodermatitis-for-the-allergist
#5
REVIEW
Samuel L Coffin, Jake E Turrentine, Ponciano D Cruz
PURPOSE OF REVIEW: The photodermatoses represent a group of disorders of sensitivity to light that continue to pose difficulties in diagnosis and management. Photodermatoses are of interest to allergists because many photosensitive skin disorders have immunologic underpinnings, and patients often present to clinic complaining of "allergy" to the sun. We provide a concise reference for allergists on the clinical recognition and management of photodermatitis. RECENT FINDINGS: New developments in the understanding of immunomodulatory effects of light have demonstrated normally immunosuppressive responses in the skin to light exposure, and a blunted immunosuppressive response in the pathogenesis of many photodermatoses...
June 2017: Current Allergy and Asthma Reports
https://www.readbyqxmd.com/read/28467404/utility-of-sun-reactive-skin-typing-and-melanin-index-for-discerning-vitamin-d-deficiency
#6
Arshad T Khalid, Charity G Moore, Christopher Hall, Flora Olabopo, Nigel L Rozario, Michael F Holick, Susan L Greenspan, Kumaravel Rajakumar
BACKGROUND: Skin color, a vitamin D status determinant, can be assessed subjectively by Fitzpatrick sun-reactive skin typing (FST) and objectively by melanin index (MI). FST was validated against MI for discerning vitamin D deficiency [serum 25-hydroxyvitamin D (25(OH)D) <20 ng/ml] in children. METHODS: We measured FST, MI, and serum 25(OH)D in healthy, 8- to 18-year-old children from one of two vitamin D trials. MI from forehead, hand, and upper arm split at the median of the more racially-balanced study cohort and FST (I-III vs...
May 3, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28459987/vitamin-d-and-fracture-risk-in-early-childhood-a-case-control-study
#7
Laura N Anderson, Sze Wing Heong, Yang Chen, Kevin E Thorpe, Khosrow Adeli, Andrew Howard, Etienne Sochett, Catherine S Birken, Patricia C Parkin, Jonathon L Maguire
The objective of this study was to evaluate the association of vitamin D intake and serum levels with fracture risk in children under 6 years of age. A case-control study was conducted in Toronto, Ontario, Canada. Cases were recruited from the fracture clinic at the Hospital for Sick Children, and matched controls were obtained from the TARGet Kids! primary-care research network. Controls were matched to cases on age, sex, height, and season. Fracture risk was estimated from conditional logistic regression, with adjustment for skin type, fracture history, waist circumference, outdoor free play, neighborhood income, soda consumption, and child's birth weight...
April 28, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28452681/the-effect-of-vernal-solar-uv-radiation-on-serum-25-hydroxyvitamin-d-concentration-depends-on-the-baseline-level-observations-from-a-high-latitude-in-finland
#8
Toni Karppinen, Meri Ala-Houhala, Lasse Ylianttila, Hannu Kautiainen, Kaisa Lakkala, Henna-Reetta Hannula, Esa Turunen, Heli Viljakainen, Timo Reunala, Erna Snellman
Humans obtain vitamin D from conversion of 7-dehydrocholesterol in the skin by ultraviolet B (UVB) radiation or from dietary sources. As the radiation level is insufficient in winter, vitamin D deficiency is common at higher latitudes. We assessed whether vernal solar UVB radiation at latitudes 61°N and 67°N in Finland has an impact on serum 25-hydroxyvitamin D [S-25(OH)D] concentrations. Twenty-seven healthy volunteers participated in outdoor activities in snow-covered terrain for 4-10 days in March or April, with their face and hands sun-exposed...
2017: International Journal of Circumpolar Health
https://www.readbyqxmd.com/read/28452068/an-evaluation-of-vitamin-d-levels-in-children-with-seasonal-allergic-rhinitis-during-pollen-season
#9
Şeyhan Kutluğ, Mehtap Kılıç, Birşen Bilgici, Şule Paksu, Alişan Yıldıran, Recep Sancak
BACKGROUND: Serum vitamin D levels have not been studied in children with seasonal allergic rhinitis (SAR). The aim of this study was to evaluate the vitamin D levels of children with SAR and to compare them to levels in healthy children during pollen season. METHODS: This study was conducted in 100 children with SAR and 100 healthy controls. Clinical and laboratory evaluations and vitamin D analyses of all the participants were performed between the months of April and July...
April 27, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28449308/a-qualitative-study-of-the-knowledge-behaviour-and-attitudes-of-patients-with-skin-cancer-regarding-sunlight-exposure-and-vitamin-d
#10
D Rutkowski, M D Farrar, J E Osman, A R Webb, L E Rhodes
BACKGROUND: Solar UVR is a major cause of skin cancer but also an important source of vitamin D (VitD), essential for musculoskeletal health. Conflicting public health messages may confuse skin cancer patients prone to further skin cancer. OBJECTIVE: To explore the knowledge, behaviour and attitudes of skin cancer patients to sunlight exposure and VitD sources. METHODS: Patients (n=10) previously treated for multiple basal cell cancer in a hospital setting, participated in focus group sessions with semi-structured discussions to explore: knowledge of VitD, sun-avoidance behaviour, and attitude towards sunlight exposure messages...
April 27, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/28442927/mechanical-factors-and-vitamin-d-deficiency-in-schoolchildren-with-low-back-pain-biochemical-and-cross-sectional-survey-analysis
#11
Ahmad H Alghadir, Sami A Gabr, Einas S Al-Eisa
OBJECTIVE: This study was designed to evaluate the role of vitamin D, muscle fatigue biomarkers, and mechanical factors in the progression of low back pain (LBP) in schoolchildren. BACKGROUND: Children and adolescents frequently suffer from LBP with no clear clinical causes, and >71% of schoolchildren aged 12-17 years will show at least one episode of LBP. MATERIALS AND METHODS: A total of 250 schoolchildren aged 12-16 years were randomly enrolled in this study...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28432394/-vitamin%C3%A2-d-and-uv-protection
#12
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...
May 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28431446/-vitamin-d-in-clinic-and-practice
#13
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
#14
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
#15
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
#16
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
#17
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)...
June 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28394766/risks-and-benefits-of-swaddling-healthy-infants-an-integrative-review
#18
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
#19
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
#20
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
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