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vitamin D and sun

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https://www.readbyqxmd.com/read/28718005/sunscreens-block-cutaneous-vitamin-d-production-with-only-a-minimal-effect-on-circulating-25-hydroxyvitamin-d
#1
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/28700743/polymorphisms-in-the-vitamin-d-receptor-gene-are-associated-with-reduced-rate-of-sputum-culture-conversion-in-multidrug-resistant-tuberculosis-patients-in-south-africa
#2
Matthew J Magee, Yan V Sun, James C M Brust, N Sarita Shah, Yuming Ning, Salim Allana, Angela Campbell, Qin Hui, Koleka Mlisana, Pravi Moodley, Neel R Gandhi
BACKGROUND: Vitamin D modulates the inflammatory and immune response to tuberculosis (TB) and also mediates the induction of the antimicrobial peptide cathelicidin. Deficiency of 25-hydroxyvitamin D and single nucleotide polymorphisms (SNPs) in the vitamin D receptor (VDR) gene may increase the risk of TB disease and decrease culture conversion rates in drug susceptible TB. Whether these VDR SNPs are found in African populations or impact multidrug-resistant (MDR) TB treatment has not been established...
2017: PloS One
https://www.readbyqxmd.com/read/28690638/fat-soluble-vitamin-deficiency-in-pediatric-patients-with-biliary-atresia
#3
Rui Dong, Song Sun, Xiao-Zhou Liu, Zhen Shen, Gong Chen, Shan Zheng
OBJECTIVE: To analyze the levels of fat-soluble vitamins (FSVs) in pediatric patients with biliary atresia (BA) before and after the Kasai procedure. METHODS: Pediatric patients with obstructive jaundice were enrolled in this study. The FSV levels and liver function before, 2 weeks after, and 1, 3, and 6 months after the Kasai procedure were measured. RESULTS: FSV deficiency was more obvious in patients with BA than in patients with other cholestatic liver diseases, especially vitamin D deficiency...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28678758/meta-analysis-of-the-correlation-between-vitamin-d-and-lung-cancer-risk-and-outcomes
#4
Jian Liu, Yongquan Dong, Chao Lu, Yina Wang, Ling Peng, Mengjie Jiang, Yemin Tang, Qiong Zhao
In this meta-analysis, we analyzed the association between vitamin D levels and lung carcinoma risk and outcomes. Two authors independently searched the Web of Science, Pubmed, EBSCO and Ovid MEDLINE resources with the key words "vitamin D, lung cancer, solar and latitude" and enrolled 22 studies that satisfied the inclusion criteria. The summary odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using the random (or fixed)-effects model. Potential confounders were carefully adjusted. High vitamin D (or calcium) intake and serum 25(OH)D levels each correlated inversely with lung cancer risk [OR = 0...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28674506/sun-exposure-and-psychotic-experiences
#5
Izabela Pilecka, Sven Sandin, Abraham Reichenberg, Robert K R Scragg, Anthony David, Elisabete Weiderpass
OBJECTIVE: Sun exposure is considered the single most important source of vitamin D. Vitamin D deficiency has been suggested to play a role in the etiology of psychotic disorders. The aim of the present study was to evaluate the association between sun exposure and psychotic experiences (PEs) in a general population sample of Swedish women. METHODS: The study population included participants from The Swedish Women's Lifestyle and Health cohort study. The 20-item community assessment of psychic experiences (CAPEs) was administered between ages 30 and 50 to establish PEs...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28674149/serum-25-hydroxyvitamin-d-level-chronic-diseases-and-all-cause-mortality-in-a-population-based-prospective-cohort-the-hunt-study-norway
#6
Yi-Qian Sun, Arnulf Langhammer, Frank Skorpen, Yue Chen, Xiao-Mei Mai
OBJECTIVE: To investigate the association of vitamin D status with all-cause mortality in a Norwegian population and the potential influences of existing chronic diseases on the association. DESIGN: A population-based prospective cohort study. SETTING: Nord-Trøndelag County, Norway. PARTICIPANTS: A random sample (n=6613) of adults aged 20 years or older in a cohort. METHODS: Serum 25-hydroxyvitamin D (25(OH)D) levels were measured in blood samples collected at baseline (n=6377)...
July 3, 2017: BMJ Open
https://www.readbyqxmd.com/read/28662021/the-role-of-vitamin-d-and-vitamin-d-receptors-in-colon-cancer
#7
Jun Sun
No abstract text is available yet for this article.
June 29, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28659572/effect-of-vitamin-d-and-tacrolimus-combination-therapy-on-iga-nephropathy
#8
Dong Yuan, Zhan Fang, Fang Sun, Jing Chang, Jian Teng, Shuhua Lin, Xiaoming Liu
BACKGROUND To explore the effects and the mechanism of vitamin D (VD) and tacrolimus (TAC) combinatorial therapy in the treatment of IgA nephropathy (IgAN) in a rat model. MATERIAL AND METHODS IgAN rat models constructed by oral immunization with bovine serum albumin (BSA) and lipopolysaccharide (LPS) (n=30) and were treated with: saline (model group), TAC (TAC group), or TAC+VD therapy (TAC+VD group) through gavage daily for 14 days. Serum creatinine (Scr), albumin (ALB), blood urea nitrogen (BUN), and urinary protein (UAE) levels were determined...
June 29, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28647929/vitamin-d-status-among-israeli-medical-residents
#9
Hadar Moran-Lev, Dror Mandel, Yosef Weisman, Amit Ovental, Ronit Lubetzky
BACKGROUND: Israel is a country with a sunny climate; however, vitamin D deficiency and insufficiency are common findings in certain populations whose exposure to sunlight is limited. Medical residency is known for long indoor working hours, thus theoretically limiting the opportunities for sun exposure. OBJECTIVES: To evaluate whether the vitamin D status among residents in a single medical center in Tel Aviv is below the normal range. METHODS: Forty-six residents (28 females, 18 males, average age 33...
June 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28640196/vitamin-d%C3%A2-and-25-hydroxyvitamin-d%C3%A2-content-of-retail-white-fish-and-eggs-in-australia
#10
Eleanor Dunlop, Judy Cunningham, Jill L Sherriff, Robyn M Lucas, Heather Greenfield, Jayashree Arcot, Norbert Strobel, Lucinda J Black
Dietary vitamin D may compensate for inadequate sun exposure; however, there have been few investigations into the vitamin D content of Australian foods. We measured vitamin D₃ and 25-hydroxyvitamin D₃ (25(OH)D₃) in four species of white fish (barramundi, basa, hoki and king dory), and chicken eggs (cage and free-range), purchased from five Australian cities. Samples included local, imported and wild-caught fish, and eggs of varying size from producers with a range of hen stocking densities. Raw and cooked samples were analysed using high performance liquid chromatography with photodiode array...
June 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28635642/lack-of-association-between-serum-vitamin-b%C3%A2-vitamin-b12-and-vitamin-d-levels-with-different-types-of-glaucoma-a-systematic-review-and-meta-analysis
#11
Shengjie Li, Danhui Li, Mingxi Shao, Wenjun Cao, Xinghuai Sun
Although vitamins play a major role in health, and their deficiency may be linked to symptoms of optic-nerve dysfunction, the association between serum vitamin levels and glaucoma in humans remains controversial. In this study, articles in the PubMed, Web of Science, and EMBASE databases were searched up to 25March 2017. Nine studies on primary open-angle glaucoma (POAG), four studies on normal tension glaucoma (NTG), and six studies on exfoliative glaucoma (EXG) were retrieved. The combined results showed no differences in the levels of serum vitamin B₆ between POAG (p = 0...
June 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28629765/study-on-the-relationship-between-vitamin-d-deficiency-and-susceptibility-to-spinal-tuberculosis
#12
Liang Tang, Shen Liu, Yu-Cheng Bao, Rui-Xiao Gao, Chen-Fu Han, Xiao-Chen Sun, Wen-Long Zhang, Shi-Qing Feng
OBJECTIVE: To investigate the effect of vitamin D deficiency on susceptibility to spinal tuberculosis and its pathological development. METHODS: A case-control design was used in this study. A total of 163 treatment-naïve patients with spinal tuberculosis admitted to this institute for an operation from June 2013 to May 2016 were included in the case group, and 170 subjects who received a health examination in the same hospital were included in the control group...
June 16, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28628759/do-infants-with-cow-s-milk-protein-allergy-have-inadequate-levels-of-vitamin-d
#13
Cristiane M Silva, Silvia A da Silva, Margarida M de C Antunes, Gisélia Alves Pontes da Silva, Emanuel Sávio Cavalcanti Sarinho, Kátia G Brandt
OBJECTIVE: To verify whether infants with cow's milk protein allergy (CMPA) have inadequate vitamin D levels. METHODS: This cross-sectional study included 120 children aged 2 years or younger, one group with CMPA and a control group. The children were recruited at the pediatric gastroenterology, allergology, and pediatric outpatient clinics of a university hospital in the Northeast of Brazil. A questionnaire was administered to the caregiver and blood samples were collected for vitamin D quantification...
June 16, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28619429/vitamin-d-and-multiple-sclerosis-an-update
#14
REVIEW
Charles Pierrot-Deseilligny, Jean-Claude Souberbielle
The most recent findings linking exposure to sun and vitamin D insufficiency to multiple sclerosis (MS) are reviewed. Due to insufficient sunshine and changing lifestyles, hypovitaminosis D is widespread in temperate countries. Numerous epidemiological studies have strongly suggested that sunshine and vitamin D insufficiency contributes to MS risk in these countries. Moreover, several large genetic studies in MS patients have recently stated unequivocally that diverse abnormalities involving vitamin D metabolism are related to the risk of the disease...
May 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/28616220/impact-of-seasonality-on-the-dynamics-of-native-vitamin-d-repletion-in-long-term-renal-transplant-patients
#15
Oliver J Ziff, Hugo Penny, Sharon Frame, Antonia Cronin, David Goldsmith
Background: Renal transplant recipients (RTRs) are often Vitamin D (VitD) depleted as a result of both chronic kidney disease and mandated sun avoidance behaviours. Repleting VitD may be warranted, but how, and for how long, is unknown, as is the impact of seasonality on the success of repletion. We investigated the impact of seasonality on VitD status following VitD repletion in a large cohort of stable, long-term RTRs. Methods: Serum 25-hydroxyvitamin D [25(OH)D] concentrations and bone biochemistry parameters were analysed from 102 VitD repletion courses in 98 RTRs that had undergone VitD repletion...
June 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28615360/a-vitamin-to-d-crease-sunburn
#16
Tiffany C Scharschmidt
High doses of oral vitamin D3 attenuate skin inflammation following experimentally induced sun damage.
June 14, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28595683/cholecalciferol-d%C3%A2-versus-ergocalciferol-d%C3%A2-in-older-adults
#17
Simona Dereje, Ilan Muradov, Samira Nazzal, Timothy Nguyen
Vitamin D is a fat-soluble vitamin that is naturally found in very few food sources. It is produced endogenously from ultraviolet light from the sun striking the skin and then triggering vitamin D synthesis and activation. Vitamin D helps promote calcium absorption in the gut, maintains adequate serum calcium and phosphate levels, promotes bone growth, modulates cell growth, and has many other roles. There have been an increasing number of people, especially in older adults, with vitamin D deficiency. This is in part a result of a reduction of sun exposure as people age, increase in use of sunscreen, and other factors...
June 1, 2017: Consultant Pharmacist: the Journal of the American Society of Consultant Pharmacists
https://www.readbyqxmd.com/read/28593496/compliance-with-indoor-tanning-bans-for-minors-among-businesses-in-the-usa
#18
Courtney C Choy, Brenda Cartmel, Rachel A Clare, Leah M Ferrucci
Indoor tanning is a known risk factor for skin cancer and is especially dangerous for adolescents. Some states have passed indoor tanning bans for minors, but business compliance with the bans is not well understood. Thus far, studies have assessed ban compliance in one or two states at a time. This study aimed to assess compliance with indoor tanning bans for minors and knowledge of dangers and benefits of tanning among indoor tanning businesses. Female research assistants posing as minors telephoned a convenience sample of 412 businesses in 14 states with tanning bans for minors under age 17 or 18...
June 7, 2017: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/28579866/prevalence-and-predictors-of-hypovitaminosis-d-among-female-university-students-in-tabuk-saudi-arabia
#19
Riyadh A Alzaheb, Osama Al-Amer
BACKGROUND: A high hypovitaminosis D prevalence has repeatedly been reported in Middle Eastern countries. Previous data regarding the vitamin D status of young women in Saudi Arabia and the related hypovitaminosis D risk factors are scarce, so this research assessed hypovitaminosis D prevalence and its risk factors among apparently healthy female university students in Tabuk, Saudi Arabia. METHODS: This cross-sectional research used a convenience sample of healthy female students (n = 180) aged between 19 and 25 years in May 2016...
2017: Clinical Medicine Insights. Women's Health
https://www.readbyqxmd.com/read/28579119/function-of-the-vitamin-d-endocrine-system-in-mammary-gland-and-breast-cancer
#20
REVIEW
JoEllen Welsh
The nuclear receptor for 1α,25-dihydroxycholecalciferol (1,25D), the active form of vitamin D, has anti-tumor actions in many tissues. The vitamin D receptor (VDR) is expressed in normal mammary gland and in many human breast cancers suggesting it may represent an important tumor suppressor gene in this tissue. When activated by 1,25D, VDR modulates multiple cellular pathways including those related to energy metabolism, terminal differentiation and inflammation. There is compelling pre-clinical evidence that alterations in vitamin D status affect breast cancer development and progression, while clinical and epidemiological data are suggestive but not entirely consistent...
June 1, 2017: Molecular and Cellular Endocrinology
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