1
|
Beckett E. More Than Bone Health: The Many Roles for Vitamin D. Nutrients 2020; 12:E2388. [PMID: 32785003 PMCID: PMC7468693 DOI: 10.3390/nu12082388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 12/28/2022] Open
Abstract
Vitamin D is well known for its important roles in maintaining calcium homeostasis and bone mineralization via the regulation of calcium mobilization and renal reabsorption, and the intestinal absorption of both calcium and phosphorus [...].
Collapse
Affiliation(s)
- Emma Beckett
- School of Environmental and Life Science, The University of Newcastle, Ourimbah, NSW 2258, Australia;
- Australia and Hunter Medical Research Institute, New Lambton Heights, NSW 2305, Australia
| |
Collapse
|
2
|
Genetic, environmental and biomarker considerations delineating the regulatory effects of vitamin D on central nervous system function. Br J Nutr 2020; 123:41-58. [PMID: 31640823 DOI: 10.1017/s000711451900268x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Studies show that vitamin D (vit-D) (25(OH)D), the bioactive metabolite (1,25(OH)2D3) and vit-D receptors (vit-D receptor; protein disulphide isomerase, family A member 3) are expressed throughout the brain, particularly in regions pivotal to learning and memory. This has led to the paradigm that avoiding vit-D deficiency is important to preserve cognitive function. However, presently, it is not clear if the common clinical measure of serum 25(OH)D serves as a robust surrogate marker for central nervous system (CNS) homeostasis or function. Indeed, recent studies report CNS biosynthesis of endogenous 25(OH)D, the CNS expression of the CYP group of enzymes which catalyse conversion to 1,25(OH)2D3 and thereafter, deactivation. Moreover, in the periphery, there is significant ethnic/genetic heterogeneity in vit-D conversion to 1,25(OH)2D3 and there is a paucity of studies which have actually investigated vit-D kinetics across the cerebrovasculature. Compared with peripheral organs, the CNS also has differential expression of receptors that trigger cellular response to 1,25(OH)2D3 metabolites. To holistically consider the putative association of peripheral (blood) abundance of 25(OH)D on cognitive function, herein, we have reviewed population and genetic studies, pre-clinical and clinical intervention studies and moreover have considered potential confounders of vit-D analysis.
Collapse
|
3
|
Abstract
Purpose
Vitamin D deficiency is a well-recognised public health problem within the UK, with specific population groups more vulnerable to deficiency. Two pilot studies were used to explore awareness of vitamin D deficiency and attitudes towards food fortification.
Design/methodology/approach
A survey of 120 participants from five at-risk groups (South Asians, Blacks, Middle Eastern, Far Eastern and Caucasian older adults over 65 years) plus a group of British Caucasians who do not avoid sun exposure explored awareness of vitamin D, sun exposure knowledge and behaviour and attitudes towards food fortification. The latter group was included to provide a comparison group who were at a reduced risk of deficiency. χ2 was used to test associations between categorical variables and the study groups. The second study used three focus groups and two interviews, conducted on young South Asian females and examined knowledge and awareness of vitamin D and vitamin D-fortified foods.
Findings
A lack of knowledge and misconceptions were highlighted by both studies in relation to at-risk factors, including sunlight exposure (p = 0.037), dietary intakes (p = 0.0174) and darker skin pigmentation (p = 0.023), sources of vitamin D and the health benefits associated with optimal consumption. Attitudes to mandatory fortification of some foods varied significantly (p = 0.004) between the groups with acceptance rates for Blacks (68 per cent), those over 65 years (50 per cent), Middle Eastern (67 per cent) and Far Eastern (73 per cent), whereas the control (71 per cent) showed no acceptance, and South Asians gave a mixed response (48 per cent No). Focus group findings highlighted positive views towards fortification, although this was less for mandatory as opposed to voluntary fortification. Both pilot studies highlight the need for more research into this area, to create more effective public health policies.
Originality/value
The research presents novel insights into a topical area where there is limited research.
Collapse
|
4
|
Guo J, Jones AK, Givens DI, Lovegrove JA, Kliem KE. Effect of dietary vitamin D 3 and 25-hydroxyvitamin D 3 supplementation on plasma and milk 25-hydroxyvitamin D 3 concentration in dairy cows. J Dairy Sci 2018; 101:3545-3553. [PMID: 29398028 DOI: 10.3168/jds.2017-13824] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 12/03/2017] [Indexed: 12/30/2022]
Abstract
Milk enriched with vitamin D by supplementing dairy cow diets could provide a valuable dietary source of vitamin D, but information on the feasibility of this approach is limited. In the current study, the effects of supplementing dairy cows with either vitamin D3 or 25(OH)D3 over the transition/early lactation period on plasma and milk vitamin D concentrations were compared. Sixty dairy cows were randomly allocated to 1 of 4 dietary treatments from 14 d precalving to 56 d postcalving. Treatments were a control diet (control) for both precalving and postcalving periods containing 0.625 mg/d of vitamin D3; a precalving diet supplemented with 6 mg of 25(OH)D3/d, but with a postcalving diet matching that of the control diet [25(OH)D3 precalving]; the control diet precalving but with the postcalving diet supplemented with 2 mg of vitamin D3/d (D3max), and the control diet precalving but with the postcalving diet supplemented with 1.5 mg of 25(OH)D3/d [25(OH)D3 postcalving]. No treatment effect on milk yield, composition or 25(OH)D3 concentration was observed. However, an interaction was observed of treatment and time for plasma 25(OH)D3 concentration; this increased within 2 wk of supplementation for the 25(OH)D3 precalving treatment (peaking just after calving, 202 ng/mL), whereas that of the 25(OH)D3 postcalving group had a slower response following supplementation, continuing to increase at 56 d. Correlations were observed between plasma and milk 25(OH)D3 concentrations at d 4 and 14 of lactation, but not at later sampling times. The D3max treatment did not increase 25(OH)D3 concentration in plasma or milk. Overall, results from this study indicate that supplemental 25(OH)D3 is an effective means of enhancing dairy cow plasma 25(OH)D3 concentrations compared with vitamin D3 supplementation, but not necessarily milk concentrations.
Collapse
Affiliation(s)
- J Guo
- Institute for Food, Nutrition and Health, School of Agriculture, Policy and Development, University of Reading, Reading, RG6 6AR, United Kingdom.
| | - A K Jones
- Institute for Animal, Dairy and Food Chain Sciences, School of Agriculture, Policy and Development, University of Reading, Reading, RG6 6AR, United Kingdom
| | - D I Givens
- Institute for Food, Nutrition and Health, School of Agriculture, Policy and Development, University of Reading, Reading, RG6 6AR, United Kingdom
| | - J A Lovegrove
- Hugh Sinclair Unit of Human Nutrition and Institute for Cardiovascular and Metabolic Research, University of Reading, Reading, RG6 6AP, United Kingdom
| | - K E Kliem
- Institute for Animal, Dairy and Food Chain Sciences, School of Agriculture, Policy and Development, University of Reading, Reading, RG6 6AR, United Kingdom
| |
Collapse
|
5
|
dos Santos MTA, Suano-Souza FI, Affonso Fonseca FL, Lazaretti-Castro M, Sarni ROS. Is There Association between Vitamin D Concentrations and Body Mass Index Variation in Women Submitted to Y-Roux Surgery? J Obes 2018; 2018:3251675. [PMID: 29854436 PMCID: PMC5960563 DOI: 10.1155/2018/3251675] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 03/22/2018] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE To evaluate vitamin D deficiency and body composition of women submitted to bariatric surgery and relate their body mass index variation after surgery to 25(OH)D concentrations. METHOD A cross-sectional and controlled study was performed including 49 obese adult volunteer women, submitted to Roux-en-Y gastric bypass (RYGB group). COLLECTED DATA Body mass index (BMI), self-declared ethnicity, economic condition, physical activity level, serum concentrations of 25-hydroxycholecalciferol (25(OH)D; radioimmunoassay), parathormone, and body composition by dual-energy X-ray absorptiometry (Hologic DXA-QDR-1000) were collected. RESULTS 25(OH)D deficiency was found in 27 (55.1%) and 8 (21.1%) in the RYGB and control groups (p=0.002). Secondary hyperparathyroidism was more frequent in the RYGB group compared to the control group (15 (30.6%) versus 1 (2.6%); p=0.001). There was no relation of the studied variables and body composition with 25(OH)D deficiency. 25(OH)D concentrations were correlated (r=-0.531; p < 0.001) with BMI reduction, regardless of vitamin D supplementation. CONCLUSION Women submitted to bariatric surgery (RYGB) around three years ago had higher BMI and vitamin D deficiency, along with hyperparathyroidism, compared to the control group. There was no association between variables related to body composition and 25(OH)D concentrations. On the other hand, vitamin concentrations correlated negatively to BMI variation after undergoing surgery.
Collapse
Affiliation(s)
| | - Fabiola Isabel Suano-Souza
- Faculdade de Medicina do ABC, Santo Andre, SP, Brazil
- Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil
| | - Fernando Luiz Affonso Fonseca
- Faculdade de Medicina do ABC, Santo Andre, SP, Brazil
- Faculdade de Medicina do ABC, Universidade Federal de São Paulo, Campus Diadema, Diadema, SP, Brazil
| | - Marise Lazaretti-Castro
- Faculdade de Medicina do ABC, Santo Andre, SP, Brazil
- Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil
| | - Roseli Oselka Saccardo Sarni
- Faculdade de Medicina do ABC, Santo Andre, SP, Brazil
- Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil
| |
Collapse
|
6
|
25(OH)D3-enriched or fortified foods are more efficient at tackling inadequate vitamin D status than vitamin D3. Proc Nutr Soc 2017; 77:282-291. [PMID: 29173203 PMCID: PMC6088524 DOI: 10.1017/s0029665117004062] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The ability to synthesise sufficient vitamin D through sunlight in human subjects can be limited. Thus, diet has become an important contributor to vitamin D intake and status; however, there are only a few foods (e.g. egg yolk, oily fish) naturally rich in vitamin D. Therefore, vitamin D-enriched foods via supplementing the animals' diet with vitamin D or vitamin D fortification of foods have been proposed as strategies to increase vitamin D intake. Evidence that cholecalciferol (vitamin D3) and calcifediol (25(OH)D3) content of eggs, fish and milk increased in response to vitamin D3 supplementation of hens, fish or cows' diets was identified when vitamin D-enrichment studies were reviewed. However, evidence from supplementation studies with hens showed only dietary 25(OH)D3, not vitamin D3 supplementation, resulted in a pronounced increase of 25(OH)D3 in the eggs. Furthermore, evidence from randomised controlled trials indicated that a 25(OH)D3 oral supplement could be absorbed faster and more efficiently raise serum 25(OH)D concentration compared with vitamin D3 supplementation. Moreover, evidence showed the relative effectiveness of increasing vitamin D status using 25(OH)D3 varied between 3·13 and 7·14 times that of vitamin D3, probably due to the different characteristics of the investigated subjects or study design. Therefore, vitamin D-enrichment or fortified foods using 25(OH)D3 would appear to have advantages over vitamin D3. Further well-controlled studies are needed to assess the effects of 25(OH)D3 enriched or fortified foods in the general population and clinical patients.
Collapse
|
7
|
Tyśkiewicz K, Dębczak A, Gieysztor R, Szymczak T, Rój E. Determination of fat- and water-soluble vitamins by supercritical fluid chromatography: A review. J Sep Sci 2017; 41:336-350. [DOI: 10.1002/jssc.201700598] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/24/2017] [Accepted: 07/24/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Katarzyna Tyśkiewicz
- Supercritical Extraction Department; New Chemical Syntheses Institute; Puławy Poland
| | - Agnieszka Dębczak
- Supercritical Extraction Department; New Chemical Syntheses Institute; Puławy Poland
| | - Roman Gieysztor
- Supercritical Extraction Department; New Chemical Syntheses Institute; Puławy Poland
| | - Tomasz Szymczak
- Supercritical Extraction Department; New Chemical Syntheses Institute; Puławy Poland
| | - Edward Rój
- Supercritical Extraction Department; New Chemical Syntheses Institute; Puławy Poland
| |
Collapse
|
8
|
Andersson Å, Björk A, Kristiansson P, Johansson G. Vitamin D intake and status in immigrant and native Swedish women: a study at a primary health care centre located at 60°N in Sweden. Food Nutr Res 2017. [PMCID: PMC4650971 DOI: 10.3402/fnr.v57i0.20089] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background Objectives Design Results Conclusion
Collapse
Affiliation(s)
- Åsa Andersson
- Gottsunda Primary Health Care Centre, Uppsala, Sweden
- Åsa Andersson, Gottsunda Primary Health Care Centre, Box 25024, SE-750 25 Uppsala, Sweden. Tel: +46 18 6118640.
| | - Anne Björk
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Per Kristiansson
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Gunnar Johansson
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| |
Collapse
|
9
|
Al Asoom LI. The Association of Adiposity Indices and Plasma Vitamin D in Young Females in Saudi Arabia. Int J Endocrinol 2016; 2016:1215362. [PMID: 27525007 PMCID: PMC4976256 DOI: 10.1155/2016/1215362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/08/2016] [Accepted: 06/26/2016] [Indexed: 12/17/2022] Open
Abstract
Background. Vitamin D deficiency is a global health problem. Some evidences indicate its association with metabolic syndrome, type II diabetes, and cardiovascular diseases. In the current study we aim to study the association of vitamin D level and indicators of adiposity in young Saudi females. Subjects and Methods. 87 young healthy Saudi females were recruited from University of Dammam, Dammam, Saudi Arabia. Each subject filled vitamin D questionnaire and had exercise stress test to determine VO2 peak. Body weight, BMI, waist and hip circumference, and ratios were determined. Blood was analyzed for 25-OH vitamin D, glucose, triglycerides, total cholesterol, and differential cholesterol. Results. 25-OH vitamin D/body weight was negatively associated with waist circumference and waist/stature ratio. No significant difference was found between the groups of BMI with regard to the data of questionnaire or 25-OH vitamin D/body weight. Obese and overweight subjects had lower VO2 peak. Conclusion. In young Saudi females we found that the relative value of vitamin D to body weight is a better indicator of vitamin D status particularly in obese subjects and it is negatively associated with adiposity measures of waist circumference and waist/stature ratio.
Collapse
Affiliation(s)
- Lubna Ibrahim Al Asoom
- Physiology Department, College of Medicine, University of Dammam (UOD), P.O. Box 1982, Dammam 31441, Saudi Arabia
- *Lubna Ibrahim Al Asoom:
| |
Collapse
|
10
|
Awareness and perception of vitamin D and vitamin D fortified foods in the North East of England. Proc Nutr Soc 2016. [DOI: 10.1017/s0029665116002299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
11
|
Mirzakhani H, Al-Garawi A, Weiss ST, Litonjua AA. Vitamin D and the development of allergic disease: how important is it? Clin Exp Allergy 2015; 45:114-25. [PMID: 25307157 DOI: 10.1111/cea.12430] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Vitamin D has known effects on lung development and the immune system that may be important in the development, severity, and course of allergic diseases (asthma, eczema, and food allergy). Vitamin D deficiency is prevalent worldwide and may partly explain the increases in asthma and allergic diseases that have occurred over the last 50-60 years. In this review, we explore past and current knowledge on the effect of vitamin D on lung development and immunomodulation and present the evidence of its role in allergic conditions. While there is growing observational and experimental evidence for the role of vitamin D, well-designed and well-powered clinical trials are needed to determine whether supplementation of vitamin D should be recommended in these disorders.
Collapse
Affiliation(s)
- H Mirzakhani
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | | | | | | |
Collapse
|
12
|
Peterson CA, Tosh AK, Belenchia AM. Vitamin D insufficiency and insulin resistance in obese adolescents. Ther Adv Endocrinol Metab 2014; 5:166-89. [PMID: 25489472 PMCID: PMC4257980 DOI: 10.1177/2042018814547205] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Obese adolescents represent a particularly vulnerable group for vitamin D deficiency which appears to have negative consequences on insulin resistance and glucose homeostasis. Poor vitamin D status is also associated with future risk of type 2 diabetes and metabolic syndrome in the obese. The biological mechanisms by which vitamin D influences glycemic control in obesity are not well understood, but are thought to involve enhancement of peripheral/hepatic uptake of glucose, attenuation of inflammation and/or regulation of insulin synthesis/secretion by pancreatic β cells. Related to the latter, recent data suggest that the active form of vitamin, 1,25-dihydroxyvitamin D, does not impact insulin release in healthy pancreatic islets; instead they require an environmental stressor such as inflammation or vitamin D deficiency to see an effect. To date, a number of observational studies exploring the relationship between the vitamin D status of obese adolescents and markers of glucose homeostasis have been published. Most, although not all, show significant associations between circulating 25-hydroxyvitamn D concentrations and insulin sensitivity/resistance indices. In interpreting the collective findings of these reports, significant considerations surface including the effects of pubertal status, vitamin D status, influence of parathyroid hormone status and the presence of nonalcoholic fatty liver disease. The few published clinical trials using vitamin D supplementation to improve insulin resistance and impaired glucose tolerance in obese adolescents have yielded beneficial effects. However, there is a need for more randomized controlled trials. Future investigations should involve larger sample sizes of obese adolescents with documented vitamin D deficiency, and careful selection of the dose, dosing regimen and achievement of target 25-hydroxyvitamn D serum concentrations. These trials should also include clamp-derived measures of in vivo sensitivity and β-cell function to more fully characterize the effects of vitamin D replenishment on insulin resistance.
Collapse
Affiliation(s)
- Catherine A Peterson
- University of Missouri, Department of Nutrition and Exercise Physiology, 204 Gwynn Hall, Columbia, MO 65211, USA
| | - Aneesh K Tosh
- Department of Child Health, University of Missouri School of Medicine, University of Missouri, Columbia, MO, USA
| | - Anthony M Belenchia
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
| |
Collapse
|
13
|
Real-life use of vitamin D3-fortified bread and milk during a winter season: the effects of CYP2R1 and GC genes on 25-hydroxyvitamin D concentrations in Danish families, the VitmaD study. GENES AND NUTRITION 2014; 9:413. [PMID: 24934498 PMCID: PMC4169060 DOI: 10.1007/s12263-014-0413-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 06/02/2014] [Indexed: 12/15/2022]
Abstract
Common genetic variants rs10741657 and rs10766197 in CYP2R1 and rs4588 and rs842999 in GC and a combined genetic risk score (GRS) of these four variants influence late summer 25-hydroxyvitamin D (25(OH)D) concentrations. The objectives were to identify those who are most at risk of developing low vitamin D status during winter and to assess whether vitamin D3-fortified bread and milk will increase 25(OH)D concentrations in those with genetically determined low 25(OH)D concentrations at late summer. We used data from the VitmaD study. Participants were allocated to either vitamin D3-fortified bread and milk or non-fortified bread and milk during winter. In the fortification group, CYP2R1 (rs10741657) and GC (rs4588 and rs842999) were statistically significantly associated with winter 25(OH)D concentrations and CYP2R1 (rs10766197) was borderline significant. There was a negative linear trend between 25(OH)D concentrations and carriage of 0–8 risk alleles (p < 0.0001). No association was found for the control group (p = 0.1428). There was a significant positive linear relationship between different quintiles of total vitamin D intake and the increase in 25(OH)D concentrations among carriers of 0–2 (p = 0.0012), 3 (p = 0.0001), 4 (p = 0.0118) or 5 (p = 0.0029) risk alleles, but not among carriers of 6–8 risk alleles (p = 0.1051). Carriers of a high GRS were more prone to be vitamin D deficient compared to carriers of a low GRS. Furthermore, rs4588-AA carriers have a low but very stable 25(OH)D concentration, and interestingly, also low PTH level.
Collapse
|
14
|
The high prevalence of vitamin D deficiency and its related maternal factors in pregnant women in Beijing. PLoS One 2013; 8:e85081. [PMID: 24386450 PMCID: PMC3873449 DOI: 10.1371/journal.pone.0085081] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 11/21/2013] [Indexed: 01/21/2023] Open
Abstract
Maternal vitamin D deficiency has been suggested to influence fetal and neonatal health. Little is known about vitamin D status in Chinese pregnant women. The purpose of this study was to assess the vitamin D status of pregnant women residing in Beijing in winter and evaluate the impact of maternal factors on serum 25-hydroxyvitamin D [25(OH)D] levels. The study was conducted on 125 healthy pregnant women. For each individual, data concerning pre-pregnancy weight, educational status, use of multivitamins and behavioral factors such as daily duration of computer use, walking and sun exposure were obtained. Serum concentrations of 25(OH)D were measured by enzyme-linked immunosorbent assay. The prevalence of vitamin D deficiency (25(OH)D < 50 nmol/L) was 96.8% and almost half (44.8%) of women were severely vitamin D deficiency (25(OH)D < 25 nmol/L). The concentration of 25(OH)D was lower in women with shorter duration of sun exposure (≤ 0.5 h/day, 25.3 ± 8.9 nmol/L) than that in women with longer duration of sun exposure (> 0.5 h/day; 30.3± 9.5 nmol/L; P = 0.003). Thirty six women (28.8%) had sun exposure duration ≥ 1.5h/day. The 25(OH)D concentration in these women was 31.5 ± 9.4 nmol/L which was also much lower than the normal level. Women who reported taking a multivitamin supplement had significantly higher 25(OH)D concentrations (32.3 ± 9.5 nmol/L) when compared with non-users (24.9 ± 8.2 nmol/L; P < 0.001). Pregnant women in Beijing are at very high risk of vitamin D deficiency in winter. Duration of Sun exposure and the use of multivitamin were the most important determinants for vitamin D status. However, neither prolonging the time of sunlight exposure nor multivitamin supplements can effectively prevent pregnant women from vitamin D deficiency. Other measures might have to be taken for pregnant women to improve their vitamin D status in winter.
Collapse
|
15
|
Huang H, Porpodis K, Zarogoulidis P, Domvri K, Giouleka P, Papaiwannou A, Primikyri S, Mylonaki E, Spyratos D, Hohenforst-Schmidt W, Kioumis I, Zarogoulidis K. Vitamin D in asthma and future perspectives. DRUG DESIGN DEVELOPMENT AND THERAPY 2013; 7:1003-13. [PMID: 24082782 PMCID: PMC3785396 DOI: 10.2147/dddt.s50599] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Humans have the ability to synthesize vitamin D during the action of ultraviolet (UV) radiation upon the skin. Apart from the regulation of calcium and phosphate metabolism, another critical role for vitamin D in immunity and respiratory health has been revealed, since vitamin D receptors have also been found in other body cells. The term "vitamin D insufficiency" has been used to describe low levels of serum 25-hydroxyvitamin D that may be associated with a wide range of pulmonary diseases, including viral and bacterial respiratory infection, asthma, chronic obstructive pulmonary disease, and cancer. This review focuses on the controversial relationship between vitamin D and asthma. Also, it has been found that different gene polymorphisms of the vitamin D receptor have variable associations with asthma. Other studies investigated the vitamin D receptor signaling pathway in vitro or in experimental animal models and showed either a beneficial or a negative effect of vitamin D in asthma. Furthermore, a range of epidemiological studies has also suggested that vitamin D insufficiency is associated with low lung function. In the future, clinical trials in different asthmatic groups, such as infants, children of school age, and ethnic minorities are needed to establish the role of vitamin D supplementation to prevent and/or treat asthma.
Collapse
Affiliation(s)
- Haidong Huang
- Department of Respiratory Diseases, Changhai Hospital/First Affiliated Hospital of the Second Military Medical University, Shanghai, People's Republic of China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Teleni L, Baker J, Koczwara B, Kimlin MG, Walpole E, Tsai K, Isenring EA. Clinical outcomes of vitamin D deficiency and supplementation in cancer patients. Nutr Rev 2013; 71:611-21. [DOI: 10.1111/nure.12047] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
| | - Jacqueline Baker
- School of Human Movement Studies; University of Queensland; Brisbane; Queensland; Australia
| | - Bogda Koczwara
- Department of Medical Oncology; Flinders Medical Centre; Adelaide; South Australia; Australia
| | - Michael G Kimlin
- NHMRC Centre for Research Excellence in Sun and Health and AusSun Research Lab; Queensland University of Technology; Brisbane; Australia
| | - Euan Walpole
- Division of Cancer Services; Princess Alexandra Hospital; Brisbane; Queensland; Australia
| | - Kathy Tsai
- School of Human Movement Studies; University of Queensland; Brisbane; Queensland; Australia
| | | |
Collapse
|
17
|
Dudani SJ, Kalhan S, Sharma SP. Vitamin D and multiple sclerosis: Potential pathophysiological role and clinical implications. Int J Appl Basic Med Res 2013; 1:71-4. [PMID: 23776780 PMCID: PMC3657971 DOI: 10.4103/2229-516x.91146] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Multiple sclerosis (MS) is thought to arise due to an interplay of genetic and environmental risk factors. Vitamin D, besides maintaining bone health and calcium metabolism, is thought to play an immunomodulatory role in the central nervous system. Studies have shown that patients with the highest level of Vitamin D (99–152 nmol/l) had a significantly lower risk of MS than the subgroup with the lowest levels (15–63 nmol/l). Furthermore, populations having a high oral intake of vitamin D had a decreased risk of MS. Hypovitaminosis D is one of the environmental risk factors for MS based on numerous physiological, experimental and epidemiologic data, which can be corrected to provide an effective therapeutic option for this debilitating disease.
Collapse
Affiliation(s)
- Sharmila J Dudani
- Department of Pathology, Army College of Medical Sciences, Delhi Cantt., New Delhi, India
| | | | | |
Collapse
|
18
|
Santos MTAD, Souza FISD, Fonseca FLA, Lazaretti-Castro M, Sarni ROS. [Changes in bone metabolism markers in women after Roux-en-Y gastric bypass]. ACTA ACUST UNITED AC 2013; 56:376-82. [PMID: 22990642 DOI: 10.1590/s0004-27302012000600006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Accepted: 07/27/2012] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To evaluate bone turnover markers and bone mineral density (BMD) in women after Roux-en-Y (RYGB) gastric bypass. SUBJECTS AND METHODS In a cross-sectional study, 48 women post-RYGB after three years, and 41 healthy women were evaluated. EVALUATIONS body mass index (BMI); physical activity; food intake; serum levels of calcium, phosphorus, magnesium, alkaline phosphatase, C-terminal telopeptide (CTX), intact parathyroid hormone (PTH), 25-hydroxyvitamin D (25OHD), osteocalcin, urinary calcium and BMD. RESULTS Significantly higher levels were observed for osteocalcin (p < 0.001), CTX (p < 0.001), and PTH (p < 0.001) in the RYGB group when compared with the control group; 25OHD deficiency/insufficiency was more frequent in the RYGB group (p = 0.010), even after adjusted for nutritional status, and it was associated with secondary hyperparathyroidism (p = 0.025); there was no difference in BMD between the groups. Energy (p = 0.036) and protein intake (p = 0.004) were lower in the RYGB group. CONCLUSION Patients submitted to RYGB showed a significantly higher frequency of vitamin D deficiency, secondary hyperparathyroidism, and increase in bone remodeling markers, with no difference in BMD status.
Collapse
Affiliation(s)
- Maria Tereza Amaral dos Santos
- Faculdade de Medicina do ABC, (FMABC). Serviço de Nutrição e Dietética, Centro Hospitalar do Município de Santo André e Curso de Pós-Graduação em Nutrição Clínica e Metabolismo, Faculdade de Pós-Graduação, Escola Técnica (CBES), Brasil
| | | | | | | | | |
Collapse
|
19
|
Brownie S, Coutts R. Focus group interviews with older Australians to explore their awareness of the national age-adjusted dietary recommendations and their suggestions for assisting them to meet these dietary targets. Aust J Prim Health 2013; 20:182-7. [PMID: 23477670 DOI: 10.1071/py13008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 02/15/2013] [Indexed: 11/23/2022]
Abstract
Promoting a healthy, nutritious diet is central to the goal of assisting individuals to age well. This study used focus groups to explore older people's awareness of the current age-adjusted nutrient recommendations and age-adjusted core food groups, and to capture their views about these dietary guidelines. Thematic analysis was applied to aggregate data into categories of frequently occurring responses. Data were collected from five focus groups: a total of 29 participants, aged 60-98 years of age. Analysis of responses revealed that participants were generally unaware of government-endorsed dietary guidelines or nutrient recommendations for older people. Their suggestions for assisting older people to meet these age-adjusted dietary targets included: targeted media campaigns to raise awareness about older people's nutrient requirements; the need for practical meal plans that do meet their dietary needs; and the removal of barriers to supermarket food choices, such as problems with opening jars and excessive packaging.
Collapse
Affiliation(s)
- Sonya Brownie
- School of Health and Human Sciences, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia
| | - Rosanne Coutts
- School of Health and Human Sciences, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia
| |
Collapse
|
20
|
Pierrot-Deseilligny C, Souberbielle JC. Contribution of vitamin D insufficiency to the pathogenesis of multiple sclerosis. Ther Adv Neurol Disord 2013; 6:81-116. [PMID: 23483715 PMCID: PMC3582312 DOI: 10.1177/1756285612473513] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The contribution of vitamin D insufficiency to the pathogenesis of multiple sclerosis (MS) is reviewed. Among the multiple recently discovered actions of vitamin D, an immunomodulatory role has been documented in experimental autoimmune encephalomyelitis and in humans. This action in the peripheral immune system is currently the main known mechanism through which vitamin D might influence MS, but other types of actions could be involved within the central nervous system. Furthermore, vitamin D insufficiency is widespread in temperate countries and in patients with MS at the earliest stages of the disease, suggesting that the deleterious effects related to vitamin D insufficiency may be exerted in these patients. In fact, many genetic and environmental risk factors appear to interact and contribute to MS. In genetics, several human leukocyte antigen (HLA) alleles (more particularly HLA-DRB1*1501) could favour the disease whereas some others could be protective. Some of the genes involved in vitamin D metabolism (e.g. CYP27B1) also play a significant role. Furthermore, three environmental risk factors have been identified: past Epstein-Barr virus infection, vitamin D insufficiency and cigarette smoking. Interactions between genetic and environmental risk or protective factors may occur during the mother's pregnancy and could continue during childhood and adolescence and until the disease is triggered in adulthood, therefore possibly modulating the MS risk throughout the first decades of life. Furthermore, some clinical findings already strongly suggest that vitamin D status influences the relapse rate and radiological lesions in patients with MS, although the results of adequately powered randomized clinical trials using vitamin D supplementation have not yet been reported. While awaiting these incontrovertible results, which might be long in coming, patients with MS who are currently in vitamin D insufficiency should be supplemented, at least for their general health status, using moderate doses of the vitamin.
Collapse
Affiliation(s)
- Charles Pierrot-Deseilligny
- Service de Neurologie 1, Hôpital de la Salpêtrière, Assistance Publique-Hôpitaux de Paris, Université Pierre et Marie Curie (Paris VI), Paris, France
| | | |
Collapse
|
21
|
Ogbah Z, Visa L, Badenas C, Ríos J, Puig-Butille JA, Bonifaci N, Guino E, Augé JM, Kolm I, Carrera C, Pujana MÁ, Malvehy J, Puig S. Serum 25-hydroxyvitamin D3 levels and vitamin D receptor variants in melanoma patients from the Mediterranean area of Barcelona. BMC MEDICAL GENETICS 2013; 14:26. [PMID: 23413917 PMCID: PMC3648347 DOI: 10.1186/1471-2350-14-26] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 02/12/2013] [Indexed: 02/04/2023]
Abstract
BACKGROUND Serum 25-hydroxyvitamin D3 (Vitamin D) insufficiency and single-nucleotide polymorphisms (SNPs) on its receptor, Vitamin D receptor (VDR), have been reported to be involved in melanoma susceptibility in populations mostly from northern countries. OBJECTIVE To investigate 25-hydroxyvitamin D3 levels and VDR SNPs in melanoma patients from sunny area of Barcelona, two studies were carried out. The first study evaluated the levels of Vitamin D at time of melanoma diagnosis and the second one analyzed the association between VDR genetic variants and risk of having a high nevus number, the strongest phenotypic risk factor for melanoma. METHODS The levels of 25-hydroxyvitamin D3 in 81 melanoma patients at diagnosis were measured. In a second group of melanoma patients, including 150 with low and 113 with high nevus number, 11 VDR SNPs were analyzed for their association with nevus number. RESULTS In the first study, 68% of patients had insufficient levels of 25-hydroxyvitamin D3 (<25 ng/ml). Autumn-winter months and fair phototype were associated with 25-hydroxyvitamin D3 insufficiency; after multivariate analysis, season of sampling remained the only independent predictor of 25-hydroxyvitamin D3 levels. In the second study, VDR variant rs2189480 (P = 0.006) was associated with risk of high nevus number whereas rs2239179 (P = 0.044) and rs7975128 (P = 0.0005) were protective against high nevus number. After Bonferroni adjustment only rs7975128 remained significant. In stratified analysis, SNP rs7975128 was found protective against multiple melanomas (P = 0.021). CONCLUSION This study showed that even in Barcelona, a sunny Mediterranean area, 25-hydroxyvitamin D3 levels were sub-optimal in the majority of melanoma patients at diagnosis. The involvement of VDR in nevi and, in turn, in melanoma susceptibility has also been suggested. Larger studies are needed to confirm our findings.
Collapse
|
22
|
Abstract
Low maternal vitamin D status during pregnancy may have negative consequences for both mother and child. There are few studies of vitamin D status and its determinants in pregnant women living at northern latitudes. Thus, the present study investigates vitamin D status and its determinants during the third trimester of women living in Sweden (latitudes 57-58°N). A total of ninety-five fair-skinned pregnant women had blood taken between gestational weeks 35 and 37. The study included a 4 d food diary and questionnaires on dietary intake, supplement use, sun exposure, skin type, travels to southern latitudes and measure of BMI. Serum 25-hydroxyvitamin D (25(OH)D) was analysed using the chemiluminescence immunoassay. In the third trimester of pregnancy, mean serum concentration of 25(OH)D was 47.4 (sd 18.1) nmol/l (range 10-93 nmol/l). In total, 65% of women had serum 25(OH)D < 50 nmol/l and 17 % < 30 nmol/l. During the winter, 85% of the pregnant women had serum 25(OH)D < 50 nmol/l and 28 % < 30 nmol/l. The main determinants of vitamin D status were as follows: season; use of vitamin D supplements; travels to southern latitudes. Together, these explained 51% of the variation in 25(OH)D. In conclusion, during the winter, the majority of fair-skinned pregnant women had serum 25(OH)D < 50 nmol/l in their third trimester and more than every fourth woman < 30 nmol/l. Higher vitamin D intake may therefore be needed during the winter for fair-skinned pregnant women at northern latitudes to avoid vitamin D deficiency.
Collapse
|
23
|
Sprake EF, Grant VA, Corfe BM. Vitamin D3 as a novel treatment for irritable bowel syndrome: single case leads to critical analysis of patient-centred data. BMJ Case Rep 2012; 2012:bcr-2012-007223. [PMID: 23239770 DOI: 10.1136/bcr-2012-007223] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Irritable bowel syndrome (IBS) is a chronic and debilitating functional disorder of the gastrointestinal tract with serious and detrimental impacts on quality of life. Its aetiology is largely unknown and the identification of effective management strategies remains far from complete. This paper first reports, a case of a 41-year-old woman IBS sufferer who reported significant symptom improvements with high-dose vitamin D3 supplementation. The sufferer identified a substantial body of patient data surrounding this potential therapy on social media sites, and this paper, therefore, also reports the findings from a systematic analysis of patient-centred, internet-based data surrounding this phenomenon. Data from 37 IBS sufferers commenting on the effect of vitamin D supplementation on their condition were located; approximately 70% of these reported that high-dose supplementation improved their IBS symptoms. A randomised controlled trial into the effect of vitamin D supplementation on IBS symptomatology to test this association scientifically is merited.
Collapse
Affiliation(s)
- Eleanor F Sprake
- Molecular Gastroenterology Research Group, Academic Unit of Surgical Oncology, Department of Oncology, University of Sheffield, Sheffield, UK
| | | | | |
Collapse
|
24
|
Halpern AC. Vitamin D: a clinical perspective. Pigment Cell Melanoma Res 2012; 26:5-8. [DOI: 10.1111/pcmr.12016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 08/28/2012] [Indexed: 11/28/2022]
|
25
|
Abstract
Asthma, one of the most prevalent diseases affecting people worldwide, is a chronic respiratory disease characterized by heightened airway inflammation, airway hyperresponsiveness and airflow obstruction in response to specific triggers. While the specific mechanisms responsible for asthma are not well understood, changing environmental factors associated with urban lifestyles may underlie the increased prevalence of the disorder. Vitamin D is of particular interest in asthma since vitamin D concentrations decrease with increased time spent indoors, decreased exposure to sunlight, less exercise, obesity, and inadequate calcium intake. Additionally, a growing body of literature suggests that there is a relationship between vitamin D status and respiratory symptoms, presumably through immunomodulatory effects of vitamin D. This review discusses vitamin D as it relates to asthma across the age spectrum, with a focus on human studies.
Collapse
|
26
|
Szabó A, Gyepes A, Nagy Á, Abrankó L, Győrfi J. The effect of UVB radiation on the vitamin D2content of white and cream type button mushrooms (Agaricus bisporusLange/Imbach) and oyster mushroom (Pleurotus ostreatus(Jacq.) P. Kumm). ACTA ALIMENTARIA 2012. [DOI: 10.1556/aalim.41.2012.suppl.18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
27
|
Daly RM, Gagnon C, Lu ZX, Magliano DJ, Dunstan DW, Sikaris KA, Zimmet PZ, Ebeling PR, Shaw JE. Prevalence of vitamin D deficiency and its determinants in Australian adults aged 25 years and older: a national, population-based study. Clin Endocrinol (Oxf) 2012; 77:26-35. [PMID: 22168576 DOI: 10.1111/j.1365-2265.2011.04320.x] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Vitamin D deficiency is recognized as a global public health problem, but the population-based prevalence of deficiency and its determinants in Australian adults is not known. This study evaluated the vitamin D status of Australian adults aged ≥25 years and risk factors associated with vitamin D deficiency in this population. DESIGN AND PATIENTS We studied a national sample of 11,247 Australian adults enrolled in the 1999/2000 Australian Diabetes, Obesity and Lifestyle (AusDiab) study drawn from 42 randomly selected districts throughout Australia. MEASUREMENTS Serum concentrations of 25-hydroxyvitamin D [25(OH)D] were measured by immunoassay. Vitamin D deficiency was defined as a concentration <50 nmol/l. Information on demographic and lifestyle factors was derived from interview-administered questionnaires. RESULTS The mean serum 25(OH)D concentration was 63 nmol/l (95% CI: 59-67 nmol/l). Only 4% of the population had a level <25 nmol/l, but the prevalence of vitamin D deficiency (<50 nmol/l) was 31% (22% men; 39% women); 73% had levels <75 nmol/l. The prevalence of vitamin D deficiency increased significantly with age, was greater in women, in those of non-Europid origin, in the obese and those who were physically inactive and with a higher level of education. Deficiency was also more common during winter and in people residing in southern Australia (latitude >35°S); 42% of women and 27% of men were deficient during summer-autumn, which increased to 58% and 35%, respectively, during winter-spring. CONCLUSION Vitamin D deficiency is common in Australia affecting nearly one-third of adults aged ≥25 years. This indicates that strategies are needed at the population level to improve vitamin D status of Australians.
Collapse
Affiliation(s)
- Robin M Daly
- Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia.
| | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Davidson ZE, Walker KZ, Truby H. Clinical review: Do glucocorticosteroids alter vitamin D status? A systematic review with meta-analyses of observational studies. J Clin Endocrinol Metab 2012; 97:738-44. [PMID: 22188740 DOI: 10.1210/jc.2011-2757] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
CONTEXT Vitamin D supplementation is an important adjunct therapy for the prevention and management of glucocorticoid-induced osteoporosis. There has been little exploration of the relationship between glucocorticosteroid (GCS) use and serum 25-hydroxyvitamin D [25(OH)D]. OBJECTIVE The aim of this study was to systematically explore how serum 25(OH)D is altered in adult patients receiving GCS. DATA SOURCES We reviewed Medline and Cinahl databases between January 1970 and August 2011. STUDY SELECTION Experimental studies were included where 25(OH)D was measured in patients more than 18 yr of age receiving GCS therapy. Studies were excluded if patients received at least 400 IU/d (10 μg/d) vitamin D, if GCS treatment was less than 2-wk duration, if more than 50% of the study population received GCS for renal or hepatic disease or after transplant, or if the study population included patients with Cushing's syndrome. A consensus method was used to classify studies. Of identified studies, 3% met the selection criteria. DATA EXTRACTION Data were extracted by a single author. Study quality was assessed using criteria developed by the American Dietetic Association. DATA SYNTHESIS The weighted mean 25(OH)D (by sample size or sd) was 22.4 [95% confidence interval (CI), 19.4, 25.3] ng/ml and 21.0 (95% CI, 13.5, 28.5) ng/ml, respectively. Random effects meta-analysis was used to compare serum 25(OH)D in patients treated with GCS compared to steroid-naive controls (either healthy or with active disease) and in patients before and after GCS administration. Serum 25(OH)D in GCS users was on average -0.5 (95% CI, -1.0, -0.1) ng/ml lower than in healthy controls (P=0.03; I2=56.4%). Serum 25(OH)D did not differ between GCS users and disease controls [standardized mean difference=0.0 (95% CI, -0.2, 0.3) ng/ml; P=0.793; I2=16.2%]. CONCLUSION The suboptimal concentrations of serum 25(OH)D found in adults receiving GCS are inadequate for prevention and management of glucocorticoid-induced osteoporosis. Recommendations for vitamin D supplementation should be adjusted accordingly.
Collapse
Affiliation(s)
- Zoe E Davidson
- Monash University, Department of Nutrition and Dietetics, Southern Clinical School of Medicine, Monash Medical Centre, Level 5, Block E, 246 Clayton Road, Clayton, Victoria, Australia 3168.
| | | | | |
Collapse
|
29
|
Vitamin d status in patients with chronic obstructive pulmonary disease who participate in pulmonary rehabilitation. J Cardiopulm Rehabil Prev 2011; 31:261-7. [PMID: 21623214 DOI: 10.1097/hcr.0b013e31821c13aa] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Vitamin D deficiency is common in patients with chronic obstructive pulmonary disease; however, no study has evaluated the influence of vitamin D status on effects of pulmonary rehabilitation (PR). METHODS We studied 311 patients, who participated in a 7-week outpatient PR. Vitamin D status was assessed at entry and examined for association with patient characteristics, dropout from PR, and effect on endurance shuttle walk time. RESULTS Vitamin D level 25 nM was seen in 61 (19.6%) of the patients. They were significantly younger, were more frequently on long-term oxygen therapy, had higher body mass index and fat-free mass index, had worse quality of life score, tended to have lower percent predicted value for forced expiratory volume in the first second of expiration, and more frequently were current smokers. They had a 3-time higher risk of dropout from the PR program (P = .003) compared with patients with normal vitamin D status and a poorer improvement in endurance shuttle walk time (P = .03). DISCUSSION In conclusion, vitamin D deficiency was significantly associated with higher dropout rates from PR, and there was a tendency toward a poorer improvement in endurance shuttle walk time.
Collapse
|
30
|
Koyyalamudi SR, Jeong SC, Pang G, Teal A, Biggs T. Concentration of vitamin D2 in white button mushrooms (Agaricus bisporus) exposed to pulsed UV light. J Food Compost Anal 2011. [DOI: 10.1016/j.jfca.2011.02.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
31
|
Di Stasio E, Maggi D, Berardesca E, Marulli GC, Bizzarri C, Lauria A, Portuesi R, Cavallo MG, Costantino F, Buzzetti R, Astorri E, Pitocco D, Songini M, Pozzilli P. Blue eyes as a risk factor for type 1 diabetes. Diabetes Metab Res Rev 2011; 27:609-13. [PMID: 21557441 DOI: 10.1002/dmrr.1214] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND A high frequency of blue eyes and fair skin are reported in northern European Caucasians with type 1 diabetes (T1D). Also there is an inverse relationship between latitude and T1D incidence. We determined whether iris colour and skin pigmentation are risk factors in a Caucasian population living in two Mediterranean regions located at the same latitude with higher ultraviolet B irradiance, but with different T1D incidence. METHODS We studied iris colour in 281 consecutive subjects with T1D and 298 controls. Skin type was evaluated by melanin quantification. RESULTS In Lazio, blue eyes and fair skin type are significantly more common in T1D subjects than in controls (21 versus 9%, p = 0.002; 50 versus 35%, p < 0.001, respectively). In Sardinia, the frequency of blue eyes in T1D subjects is twice that in controls (5.8 versus 2.6% and significantly higher when compared to the expected calculated frequency in the entire population). By logistic regression analysis, only blue eyes are independent and significant predictors of T1D [odds ratio for blue eyes = 2.2; 95% confidence interval (1.1-4.4), p = 0.019]. CONCLUSIONS As previously shown in a Caucasian population from northern Europe, blue eyes and a trend for fair skin increase the risk for T1D also in a Caucasian population born and residing in a Mediterranean region (Continental Italy). This finding may be relevant for explaining different T1D incidence as prevalence of blue eyes differ substantially between northern and southern European Caucasians.
Collapse
Affiliation(s)
- Enrico Di Stasio
- Institute of Biochemistry and Clinical Biochemistry, Catholic University of Sacred Hearth, Rome, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Welsh P, Peters MJL, Sattar N. Is vitamin D in rheumatoid arthritis a magic bullet or a mirage? The need to improve the evidence base prior to calls for supplementation. ACTA ACUST UNITED AC 2011; 63:1763-9. [PMID: 21400480 DOI: 10.1002/art.30341] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
33
|
Clipp SL, Burke A, Hoffman-Bolton J, Alani R, Liégeois NJ, Alberg AJ. Sun-seeking behavior to increase cutaneous vitamin D synthesis: when prevention messages conflict. Public Health Rep 2011; 126:533-9. [PMID: 21800747 DOI: 10.1177/003335491112600409] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES The public has long been encouraged to engage in sun-safe practices to minimize exposure to sunlight, the major cause of nonmelanoma skin cancer. More recently, some have advocated unprotected sun exposure to increase cutaneous synthesis of vitamin D as a way to promote health. We assessed the net result of these conflicting messages. METHODS In a cross-sectional survey in 2007, questionnaires were mailed to participants of an ongoing cohort study in Washington County, Maryland. The study population consisted of 8,027 adults (55% response rate). RESULTS Thirty percent of respondents were aware that unprotected sun exposure increased endogenous vitamin D levels. Among those who were aware of this benefit, 42% reported going out into the sun to increase vitamin D levels. Sun-seeking to increase vitamin D production did not significantly differ according to self-reported personal history of skin cancer, but was significantly higher among women, older age groups, those with less education, and vitamin D supplement users. CONCLUSION A substantial proportion of respondents reported sun-seeking behavior expressly to increase endogenous vitamin D levels. The message about sun exposure and vitamin D is reaching the general public; however, this finding poses challenges to skin cancer prevention efforts.
Collapse
Affiliation(s)
- Sandra L Clipp
- Comstock Center for Public Health Research and Prevention, Washington County, MD, USA
| | | | | | | | | | | |
Collapse
|
34
|
Ware WR. The JUPITER lipid lowering trial and vitamin D: Is there a connection? DERMATO-ENDOCRINOLOGY 2011; 2:50-4. [PMID: 21547097 DOI: 10.4161/derm.2.2.13235] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Accepted: 08/03/2010] [Indexed: 12/31/2022]
Abstract
There is growing evidence that vitamin D deficiency significantly increases the risk of adverse cardiovascular events and that a vitamin D status representing sufficiency or optimum is protective. Unfortunately, in clinical trials that address interventions for reducing risk of adverse cardiovascular events, vitamin D status is not generally measured. Failure to do this has now assumed greater importance with the report of a study that found rosuvastatin at doses at the level used in a recent large randomized lipid lowering trial (JUPITER) had a large and significant impact on vitamin D levels as measured by the metabolite 25-hydroxyvitamin D. The statin alone appears to have increased this marker such that the participants on average went from deficient to sufficient in two months. The difference in cardiovascular risk between those deficient and sufficient in vitamin D in observational studies was similar to the risk reduction found in JUPITER. Thus it appears that this pleiotropic effect of rosuvastatin may be responsible for part of its unusual effectiveness in reducing the risk of various cardiovascular endpoints found in JUPITER and calls into question the interpretation based only on LDL cholesterol and CRP changes. In addition, vitamin D status is a cardiovascular risk factor which up until now has not been considered in adjusting study results or in multivariate analysis, and even statistical analysis using only baseline values may be inadequate.
Collapse
Affiliation(s)
- William R Ware
- Faculty of Science (Emeritus); University of Western Ontario; London, ON CA
| |
Collapse
|
35
|
Huebbe P, Nebel A, Siegert S, Moehring J, Boesch-Saadatmandi C, Most E, Pallauf J, Egert S, Müller MJ, Schreiber S, Nöthlings U, Rimbach G. APOE ε4 is associated with higher vitamin D levels in targeted replacement mice and humans. FASEB J 2011; 25:3262-70. [PMID: 21659554 DOI: 10.1096/fj.11-180935] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The allele ε4 of apolipoprotein E (APOE), which is a key regulator of lipid metabolism, represents a risk factor for cardiovascular diseases and Alzheimer's disease. Despite its adverse effects, the allele is common and shows a nonrandom global distribution that is thought to be the result of evolutionary adaptation. One hypothesis proposes that the APOE ε4 allele protects against vitamin D deficiency. Here we present, for the first time, experimental and epidemiological evidence that the APOE ε4 allele is indeed associated with higher serum vitamin D [25(OH)D] levels. In APOE4 targeted replacement mice, significantly higher 25(OH)D levels were found compared with those in APOE2 and APOE3 mice (70.9 vs. 41.8 and 27.8 nM, P<0.05). Furthermore, multivariate adjusted models show a positive association of the APOE ε4 allele with 25(OH)D levels in a small collective of human subjects (n=93; P=0.072) and a general population sample (n=699; P=0.003). The novel link suggests ε4 as a modulator of vitamin D status. Although this result agrees well with evolutionary aspects, it appears contradictory with regard to chronic diseases, especially cardiovascular disease. Large prospective cohort studies are now needed to investigate the potential implications of this finding for chronic disease risks.
Collapse
Affiliation(s)
- Patricia Huebbe
- Institute of Human Nutrition and Food Science, Christian-Albrechts-University, Kiel, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Zwart SR, Mehta SK, Ploutz-Snyder R, Bourbeau Y, Locke JP, Pierson DL, Smith SM. Response to vitamin D supplementation during Antarctic winter is related to BMI, and supplementation can mitigate Epstein-Barr Virus Reactivation. J Nutr 2011; 141:692-7. [PMID: 21539011 DOI: 10.3945/jn.110.134742] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Maintaining vitamin D status without sunlight exposure is difficult without supplementation. This study was designed to better understand interrelationships between periodic vitamin D supplementation and immune function in Antarctic workers. The effect of 2 oral dosing regimens of vitamin D supplementation on vitamin D status and markers of immune function was evaluated in people in Antarctica with no UV light exposure for 6 mo. Participants were given a 2000-IU (50 μg) daily (n = 15) or 10,000-IU (250 μg) weekly (n = 14) vitamin D supplement for 6 mo during a winter in Antarctica. Biological samples were collected at baseline and at 3 and 6 mo. Vitamin D intake, markers of vitamin D and bone metabolism, and latent virus reactivation were determined. After 6 mo, the serum 25-hydroxyvitamin D concentration (mean ± SD) increased from 56 ± 17 to 79 ± 16 nmol/L and from 52 ± 10 to 69 ± 9 nmol/L in the 2000-IU/d and 10,000-IU/wk groups, respectively (main effect over time, P < 0.001). Participants with a greater BMI (participant BMI range = 19–43 g/m2) had a smaller increase in 25-hydroxyvitamin D after 6-mo supplementation (P < 0.05). Participants with high serum cortisol and higher serum 25-hydroxyvitamin D were less likely to shed Epstein-Barr virus in saliva (P < 0.05). The doses given raised vitamin D status in participants not exposed to sunlight for 6 mo, and the efficacy was influenced by baseline vitamin D status and BMI. The data also provide evidence that vitamin D, interacting with stress, can reduce risk of latent virus reactivation during the winter in Antarctica.
Collapse
Affiliation(s)
- Sara R Zwart
- Universities Space Research Association, Houston, TX 77058, USA
| | | | | | | | | | | | | |
Collapse
|
37
|
Nilsen LTN, Aalerud TN, Hannevik M, Veierød MB. UVB and UVA irradiances from indoor tanning devices. Photochem Photobiol Sci 2011; 10:1129-36. [DOI: 10.1039/c1pp05029j] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
38
|
Veierød MB, Nilsen LTN, Robsahm TE. [Solaria, vitamin D, and skin cancer]. TIDSSKRIFT FOR DEN NORSKE LEGEFORENING 2010; 130:1818-21. [PMID: 20882079 DOI: 10.4045/tidsskr.09.0435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
BACKGROUND Some researchers have suggested to use an indoor tanning device (solarium) as a vitamin D source for disease prevention. MATERIAL AND METHODS The article is based on non-systematic searches in PubMed and ISI, and the authors' experience from epidemiologic research and studies of solarium irradiance. RESULTS Vitamin D deficiency is an established risk factor for rickets in children and osteomalacia in adults; and is associated with an increased risk of osteoporosis and fractures. Several studies have found a beneficial role of vitamin D on both incidence and prognosis for other diseases, e.g. cancer, but causal relationships with vitamin D cannot yet be concluded. Sun exposure, our main source of vitamin D, is also an established risk factor of skin cancer. Moderate sun exposure generally provides an adequate amount of vitamin D during summer. Dietary intake of vitamin D is adamant when sun exposure is low. Solarium use seems to increase. Mean irradiance from solariums is higher than that from the summer sun in Oslo; 1.5 times higher for UVB and 3.5 times for UVA . Use of solarium increases the risk of skin cancer and was classified as carcinogenic to humans in 2009; positive health effects are not sufficiently documented. INTERPRETATION Recommendations on restricted solarium use should be maintained.
Collapse
Affiliation(s)
- Marit B Veierød
- Avdeling for biostatistikk, Institutt for medisinske basalfag, Universitetet i Oslo, Postboks 1122 Blindern, 0317 Oslo, Norway.
| | | | | |
Collapse
|
39
|
Editorial. Nutr Res Rev 2009; 22:109-10. [PMID: 20003588 DOI: 10.1017/s0954422409990199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|