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https://www.readbyqxmd.com/read/29035301/exploring-knowledge-and-attitudes-about-vitamin-d-among-adults-in-saudi-arabia-a-qualitative-study
#1
Najlaa Aljefree, Patricia Lee, Faruk Ahmed
Abstract: Vitamin D deficiency is widespread in Saudi Arabia. The aim of this study was to explore participants' knowledge about vitamin D and attitudes toward sun exposure. The study also aimed to explore the social and cultural factors that might potentially contribute to vitamin D deficiency in Saudi Arabia. Face-to-face interviews were carried out in the cities of Jeddah and Makkah between May and October 2015. The interview questions were semi-structured, and the data was analyzed using thematic analysis...
October 16, 2017: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/29031034/-potential-of-using-vitamin-d-as-an-adjuvant-treatment-of-malignant-melanoma
#2
B Bolerázska, E Ďurovcová, M Mareková
The incidence of malignant melanoma worldwide continues to grow despite the enormous advances in topical and systemic therapy. This increase is recorded regularly even in countries where, as a result of public health campaigns, dermatological examination and subsequent treatment have become more frequent. However, there have been reports of a stable or even decreasing mortality rate that seem to contradict the objective increase in its incidence. The well-known risk factors for malignant melanoma include sunburns and occasional sunbathing, whereas regular sunbathing is associated with a lower incidence...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28994020/vitamin-d-and-the-skin-an-update-for-dermatologists
#3
REVIEW
Elio Kechichian, Khaled Ezzedine
Vitamin D plays a key role in skeletal and cardiovascular disorders, cancers, central nervous system diseases, reproductive diseases, infections, and autoimmune and dermatological disorders. The two main sources of vitamin D are sun exposure and oral intake, including vitamin D supplementation and dietary intake. Multiple factors are linked to vitamin D status, such as Fitzpatrick skin type, sex, body mass index, physical activity, alcohol intake, and vitamin D receptor polymorphisms. Patients with photosensitive disorders tend to avoid sun exposure, and this practice, along with photoprotection, can put this category of patients at risk for vitamin D deficiency...
October 9, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28990310/the-interaction-between-vitamin-d-receptor-polymorphisms-and-sun-exposure-around-time-of-diagnosis-influences-melanoma-survival
#4
Irene Orlow, Yang Shi, Peter A Kanetsky, Nancy E Thomas, Li Luo, Sergio Corrales Guerrero, Anne E Cust, Lidia Sacchetto, Roberto Zanetti, Stefano Rosso, Bruce K Armstrong, Terence Dwyer, Alison Venn, Richard P Gallagher, Stephen B Gruber, Loraine D Marrett, Hoda Anton-Culver, Klaus Busam, Colin B Begg, Marianne Berwick
Evidence on the relationship between the vitamin D pathway and outcomes in melanoma is growing, although it is not always clear. We investigated the impact of measured levels of sun exposure at diagnosis on associations of vitamin D receptor gene (VDR) polymorphisms and melanoma-death in 3336 incident primary melanoma cases. Interactions between six SNPs and a common 3' end haplotype were significant (p<0.05). These SNPs, and a haplotype, had a statistically significant association with survival among subjects exposed to high UVB in multivariable regression models, and exerted their effect in the opposite direction among those with low UVB...
October 9, 2017: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/28976930/association-of-sun-exposure-skin-colour-and-body-mass-index-with-vitamin-d-status-in-individuals-who-are-morbidly-obese
#5
Clare F Dix, Judith D Bauer, Ian Martin, Sharon Rochester, Briony Duarte Romero, Johannes B Prins, Olivia R L Wright
Vitamin D deficiency is a common issue, particularly in obese populations, and is tested by assessing serum 25(OH)D concentrations. This study aimed to identify factors that contribute to the vitamin D status in fifty morbidly obese individuals recruited prior to bariatric surgery. Data collected included serum 25(OH)D concentrations, dietary and supplement intake of vitamin D, sun exposure measures, skin colour via spectrophotometry, and genotype analysis of several single nucleotide polymorphisms in the vitamin D metabolism pathway...
October 4, 2017: Nutrients
https://www.readbyqxmd.com/read/28914773/vitamin-d-nutritional-status-and-its-related-factors-for-chinese-children-and-adolescents-in-2010-2012
#6
Yichun Hu, Jing Chen, Rui Wang, Min Li, Chunfeng Yun, Weidong Li, Yanhua Yang, Jianhua Piao, Xiaoguang Yang, Lichen Yang
Vitamin D plays a critical role in calcium and phosphate metabolism and helps maintain skeletal integrity in childhood, yet vitamin D status in Chinese children and adolescents is not well documented. The aim of this study was to assess the vitamin D status and analyze the risk factors for vitamin D deficiency in Chinese children and adolescents aged 6-17 years. Serum 25 hydroxyvitamin D (25(OH)D) was measured with a radioimmunoassay kit in 15,000 children and adolescent participants in the Chinese national nutrition and health survey (CNNHS) 2010-2012...
September 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28904394/ultraviolet-b-light-emitting-diodes-leds-are-more-efficient-and-effective-in-producing-vitamin-d3-in-human-skin-compared-to-natural-sunlight
#7
T A Kalajian, A Aldoukhi, A J Veronikis, K Persons, M F Holick
Vitamin D, the sunshine vitamin is important for health. Those with fat malabsorption disorders malabsorb vitamin D and thus must rely on cutaneous production of vitamin D3. Vitamin D3 is generated secondary to exposure to ultraviolet B (UVB) radiation (whether from the sun or from an artificial source). Light emitting diodes (LEDs) have been developed to emit ultraviolet radiation. Little is known about the efficiency of UVB emitting LEDs tuned to different wavelengths for producing vitamin D3 in human skin...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28901695/vitamin-d-australian-dietitian-s-knowledge-and-practices
#8
Clare F Dix, Alex Robinson, Judith D Bauer, Olivia R L Wright
AIM: To survey dietitians on their knowledge and practices regarding vitamin D (VitD) intake, sources, supplementation and effect on disease state. METHODS: An online survey was disseminated to members of the Dietitian Association Australia via the weekly online state newsletter during April 2015. Response rate was 3%, with 134 respondents completing the survey. The survey included questions about knowledge and current practices. Descriptive statistics were used to analyse the results...
September 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28882871/independent-and-synergistic-associations-of-biomarkers-of-vitamin-d-status-with-risk-of-coronary-heart-disease
#9
Lu Qi, Wenjie Ma, Yoriko Heianza, Yan Zheng, Tiange Wang, Dianjianyi Sun, Eric B Rimm, Frank B Hu, Edward Giovannucci, Christine M Albert, Kathryn M Rexrode, JoAnn E Manson
OBJECTIVE: To comprehensively evaluate the independent associations and potential interactions of vitamin D-related biomarkers including total and bioavailable 25-hydroxyvitamin D (25OHD), VDBP (vitamin D binding protein), and parathyroid hormone (PTH) with risk of coronary heart disease (CHD). APPROACH AND RESULTS: We prospectively identified incident cases of nonfatal myocardial infarction and fatal CHD among women in the Nurses' Health Study during 20 years of follow-up (1990-2010)...
September 7, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28876433/association-between-physical-activity-and-vitamin-d-a-narrative-literature-review
#10
Marcos Rassi Fernandes, Waldivino Dos Reis Barreto
This narrative review of the medical literature assessed whether outdoor and indoor physical activity would increase the plasma levels of vitamin D. Synthesis of this liposoluble vitamin is mainly mediated by sunlight on the skin, where it is activated to perform its main action, which is to control the serum levels of calcium as soon as the element is absorbed in the intestines, assisting in the regulation of bone metabolism. Physical activity is any body movement that results in energy expenditure, while outdoor physical activity refers to physical activity carried out at public parks or other open spaces, as is the case of the popular practice of taking walks...
June 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28875865/predictors-and-correlates-of-serum-25-hydroxyvitamin-d-concentrations-in-young-women-results-from-the-safe-d-study
#11
Emma T Callegari, Suzanne M Garland, Alexandra Gorelik, Nicola J Reavley, John D Wark
Vitamin D deficiency is a global public health concern. Studies of serum 25-hydroxyvitamin D (25(OH)D) determinants in young women are limited and few include objective covariates. Our aims were to define the prevalence of vitamin D deficiency and examine serum 25(OH)D correlates in an exploratory study of women aged 16-25 years. We studied 348 healthy females living in Victoria, Australia, recruited through Facebook. Data collected included serum 25(OH)D assayed by liquid chromatography-tandem MS, relevant serum biochemistry, soft tissue composition by dual-energy X-ray absorptiometry, skin melanin density, Fitzpatrick skin type, sun exposure using UV dosimeters and lifestyle factors...
August 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28871327/micronutrient-intake-adequacy-and-depression-risk-in-the-sun-cohort-study
#12
Almudena Sánchez-Villegas, Aurora Pérez-Cornago, Itziar Zazpe, Susana Santiago, Francisca Lahortiga, Miguel Angel Martínez-González
PURPOSE: The aim of the study was to prospectively assess the association between micronutrient intake adequacy and risk of depression. METHODS: This dynamic cohort study involves Spanish university graduates (SUN Project). Dietary intake was assessed at baseline and after 10 years of follow-up with a semi-quantitative food frequency questionnaire. Micronutrient intake adequacy for vitamins B1, B2, B3, B6, B12, C, A, D, E, folic acid, zinc, iodine, selenium, iron, calcium, potassium, phosphorus, magnesium and chrome was estimated...
September 4, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28867355/the-relationship-between-physical-activity-and-vitamin-d-status-in-postpartum-lactating-and-formula-feeding-women
#13
Jordan T Hall, Myla Ebeling, Judy R Shary, Nina Forestieri, Carol L Wagner
Existing research shows an association between physical activity levels and vitamin D status in the elderly, men, women, children, and adolescent populations. This association has not yet been investigated in postpartum women. We hypothesized that based on the relationship between vitamin D and physical activity found in other populations, greater physical activity levels in postpartum women will be associated with higher serum 25(OH)D levels. A post hoc analysis of 286 postpartum women with self reported physical activity data from the America on the Move survey, and measured circulating serum 25(OH)D (measured by RIA) as an indicator of vitamin D status, was gathered at baseline (4-6 weeks postpartum), 4 months, and 7 months postpartum...
August 31, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28860112/risk-factors-for-falls-in-older-patients-with-cancer
#14
Xiaotao Zhang, Ming Sun, Suyu Liu, Cheuk Hong Leung, Linda Pang, Uday R Popat, Richard Champlin, Holly M Holmes, Vicente Valero, Colin P Dinney, Debu Tripathy, Beatrice J Edwards
OBJECTIVES: A rising number of patients with cancer are older adults (65 years of age and older), and this proportion will increase to 70% by the year 2020. Falls are a common condition in older adults. We sought to assess the prevalence and risk factors for falls in older patients with cancer. METHODS: This is a single-site, retrospective cohort study. Patients who were receiving cancer care underwent a comprehensive geriatric assessments, including cognitive, functional, nutritional, physical, falls in the prior 6 months and comorbidity assessment...
August 31, 2017: BMJ Supportive & Palliative Care
https://www.readbyqxmd.com/read/28841848/comparative-efficacy-and-safety-of-paricalcitol-versus-vitamin-d-receptor-activators-for-dialysis-patients-with-secondary-hyperparathyroidism-a-meta-analysis-of-randomized-controlled-trials
#15
Yifeng Xie, Peiling Su, Yifan Sun, Hongsheng Zhang, Rong Zhao, Liang Li, Lanfen Meng
BACKGROUND: Secondary hyperparathyroidism (SHPT) is a severe complication for dialysis patients. Vitamin D receptor activators (VDRAs) are used to treat SHPT, but the comparative efficacy and safety between paricalcitol and other vitamin D receptor activators for management of SHPT in dialysis patients has been unproven. METHODS: We searched PubMed, Embase, and the Cochrane Library for the time period through June 2017 to identify randomized controlled trials that evaluated paricalcitol compared with other VDRAs for treatment of SHPT...
August 25, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28838765/adherence-to-the-mediterranean-dietary-pattern-and-incidence-of-nephrolithiasis-in-the-seguimiento-universidad-de-navarra-follow-up-sun-cohort
#16
Alessandro Leone, Alejandro Fernández-Montero, Carmen de la Fuente-Arrillaga, Miguel Ángel Martínez-González, Simona Bertoli, Alberto Battezzati, Maira Bes-Rastrollo
BACKGROUND: Diet plays an important role in the pathogenesis of nephrolithiasis. Limited data are available to investigate the association between a Mediterranean dietary pattern and risk for nephrolithiasis. STUDY DESIGN: Prospective cohort study. SETTING & PARTICIPANTS: 16,094 men and women without a history of nephrolithiasis who participated in the Seguimiento Universidad de Navarra Follow-up (SUN) Project. PREDICTORS: A validated 136-item food frequency questionnaire was used to assess baseline adherence to a Mediterranean dietary pattern that is high in fruits, vegetables, nuts, fish, and legumes, but moderate in alcohol and low in meats, saturated fats, and sugars...
August 22, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28834607/association-of-baseline-vitamin-d-level-with-genetic-determinants-and-virologic-response-in-patients-with-chronic-hepatitis-b
#17
Rui Yu, Deming Tan, Qin Ning, Junqi Niu, Xuefan Bai, Shijun Chen, Jun Cheng, Yanyan Yu, Hao Wang, Min Xu, Guangfeng Shi, Mobin Wan, Xinyue Chen, Hong Tang, Jifang Sheng, Xiaoguang Dou, Junping Shi, Hong Ren, Maorong Wang, Hongfei Zhang, Zhiliang Gao, Chengwei Chen, Hong Ma, Jidong Jia, Jinlin Hou, Qing Xie, Jian Sun
AIM: The role of vitamin D in individuals with chronic hepatitis B (CHB) is unclear. We aimed to explore the association of baseline vitamin D level with genetic determinants and week-104 treatment outcome in CHB patients. METHODS: Baseline serum 25-hydroxycholecalciferol [25(OH)D] levels and genetic polymorphism within GC, DHCR7 and CYP2R1 were determined in stored serum of 560 patients who were enrolled into a multicenter, randomized, controlled study and completed the 104-week telbivudine monotherapy or telbivudine-based optimized therapy...
August 23, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28832880/association-of-vitamin-d-receptor-polymorphisms-with-the-risk-of-nonmelanoma-skin-cancer-in-adults
#18
Erin M Burns, Purushotham Guroji, Israr Ahmad, Hana M Nasr, Yingxue Wang, Iman A Tamimi, Elijah Stiefel, Mohammad S Abdelgawwad, Abdullah Shaheen, Anum F Muzaffar, Lisa M Bush, Christina B Hurst, Russell L Griffin, Craig A Elmets, Nabiha Yusuf
Importance: Protective effects of UV-B radiation against nonmelanoma skin cancer (NMSC) are exerted via signaling mechanisms involving the vitamin D receptor (VDR). Recent studies have examined single-nucleotide polymorphisms (SNPs) in the VDR, resulting in contradictory findings as to whether these polymorphisms increase a person's risk for NMSC. Objective: To examine whether the polymorphisms in the VDR gene are associated with the development of NMSC and the demographic characteristics of the participants...
August 23, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28822355/baseline-assessment-of-25-hydroxyvitamin-d-assay-performance-a-vitamin-d-standardization-program-vdsp-interlaboratory-comparison-study
#19
Stephen A Wise, Karen W Phinney, Susan S-C Tai, Johanna E Camara, Gary L Myers, Ramon Durazo-Arvizu, Lu Tian, Andrew N Hoofnagle, Lorin M Bachmann, Ian S Young, Juanita Pettit, Grahame Caldwell, Andrew Liu, Stephen P J Brooks, Kurtis Sarafin, Michael Thamm, Gert B M Mensink, Markus Busch, Martina Rabenberg, Kevin D Cashman, Mairead Kiely, Michael Kinsella, Karen Galvin, Joy Y Zhang, Kyungwon Oh, Sun-Wha Lee, Chae L Jung, Lorna Cox, Gail Goldberg, Kate Guberg, Ann Prentice, Graham D Carter, Julia Jones, Patsy M Brannon, Robyn M Lucas, Peter M Crump, Etienne Cavalier, Joyce Merkel, Joseph M Betz, Christopher T Sempos
The Vitamin D Standardization Program (VDSP) coordinated an interlaboratory study to assess the comparability of measurements of total 25-hydroxyvitamin D [25(OH)D] in human serum, which is the primary marker of vitamin D status. A set of 50 individual donor samples were analyzed by 15 different laboratories representing national nutrition surveys, assay manufacturers, and clinical and/or research laboratories to provide results for total 25(OH)D using both immunoassays (IAs) and LC tandem MS (MS/MS). The results were evaluated relative to bias compared with the target values assigned based on a combination of measurements at Ghent University (Belgium) and the U...
September 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28822224/is-it-necessary-for-all-samples-to-quantify-25ohd2-and-25ohd3-using-lc-ms-ms-in-clinical-practice
#20
Songlin Yu, Ruiping Zhang, Weiyan Zhou, Xinqi Cheng, Qian Cheng, Liangyu Xia, Shaowei Xie, Yicong Yin, Dandan Sun, Wei Su, Ling Qiu
BACKGROUND: The demand for vitamin D testing is increasing in China. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) immunoassay is specific and accurate but requires expensive equipment, experienced operators, and complicated pretreatment of serum. Automated immunoassays are simple and convenient but only determine total 25-hydroxyvitamin D (25OHD). The objective of this study was to quantify 25OHD2 and 25OHD3 in patients to assist clinical physicians and laboratory directors in choosing the most appropriate method to determine 25OHD...
August 19, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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