scholarly journals Vitamin D Deficiency as It Relates to Oral Immunity and Chronic Periodontitis

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
R. A. G. Khammissa ◽  
R. Ballyram ◽  
Y. Jadwat ◽  
J. Fourie ◽  
J. Lemmer ◽  
...  
Keyword(s):  
Vitamin D ◽  
Serum Level ◽  
Chronic Periodontitis ◽  
Active Form ◽  
Antibacterial Properties ◽  
Vitamin D Supplementation ◽  
Biologically Active ◽  
Periodontal Treatment ◽  
Periodontal Health ◽  
Cross Sectional

The biologically active form of vitamin D, 1,25 dihydroxyvitamin D (1,25(OH)2D) and its receptor, the vitamin D receptor (VDR), play roles in maintaining oral immunity and the integrity of the periodontium. Results of observational cross-sectional clinical studies investigating the association between vitamin D serum level and the incidence and severity of chronic periodontitis indicate that, perhaps owing to the immunomodulatory, anti-inflammatory, and antibacterial properties of 1,25(OH)2D/VDR signalling, a sufficient serum level of vitamin D is necessary for the maintenance of periodontal health. In cases of established chronic periodontitis, vitamin D supplementation is associated with reduction in the severity of periodontitis. As cross-sectional studies provide only weak evidence for any causal association and therefore are of questionable value, either longitudinal cohort studies, case controlled studies, or randomized control trials are needed to determine whether or not deficiency of vitamin D is a risk factor for chronic periodontitis, and whether or not vitamin D supplementation adjunctive to standard periodontal treatment is in any way beneficial. In this article, we discuss the relationship between vitamin D, oral immunity and periodontal disease and review the rationale for using vitamin D supplementation to help maintain periodontal health and as an adjunct to standard periodontal treatment.

Association of vitamin D metabolite levels with relapse rate and disability in multiple sclerosis

2008 ◽  
Vol 14 (9) ◽  
pp. 1220-1224 ◽  
Author(s):  
J Smolders ◽  
P Menheere ◽  
A Kessels ◽  
J Damoiseaux ◽  
R Hupperts
Keyword(s):  
Multiple Sclerosis ◽  
Vitamin D ◽  
Relapse Rate ◽  
Serum Levels ◽  
Cross Sectional Study ◽  
Vitamin D Supplementation ◽  
Biologically Active ◽  
Serum Samples ◽  
Cross Sectional ◽  
Edss Score

Background Multiple Sclerosis is associated with low serum levels of 25-hydroxyvitamin D (25(OH)D). We investigated the association between serum levels of 25(OH)D and 1,25-dihydroxyvitamin D (1,25(OH)2D), the biologically active metabolite, and clinical MS severity as expressed by EDSS-score and relapse rate. Study-design Cross-sectional study. Patients and Methods Serum samples from 267 MS patients were collected for 25(OH)D and 1,25(OH)2D measurement. Clinical MS parameters at the date of serum sampling were determined. Results: Both metabolite levels were significantly lower in the progressive forms compared to the relapsing remitting (RR)MS phenotype. In RRMS patients (disease course ≤ 5 years), high 25(OH)D levels were associated with a high chance of remaining relapse-free. Low 25(OH)D levels were associated with high EDSS-scores. 1,25(OH)2D was not directly associated with relapse rate or EDSS-score, and was dependent of age and 25(OH)D level. Conclusion Serum levels of 25(OH)D were associated with both relapse rate and disability in MS patients. These results are suggestive for a disease modulating effect of the serum concentrations of 25(OH)D on MS. The low circulating 1,25(OH)2D levels in progressive MS are due to older age and lower 25(OH)D levels. The potential consequences for vitamin D supplementation in MS will be discussed.

scholarly journals Vitamin D Supplementation in Tuberculosis Patients: A Cross Sectional Study

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Dina Keumala Sari ◽  
Nurfida Khairina Arrasyid ◽  
Y. S. Harahap
Keyword(s):  
Vitamin D ◽  
Serum Level ◽  
Serum Levels ◽  
Cross Sectional Study ◽  
Vitamin D Supplementation ◽  
Sectional Study ◽  
Cross Sectional ◽  
Tuberculosis Patients ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Previous studies have not been able to show with certainty the effect of vitamin D supplementation in tuberculosis patients. The objective of this study is to determine whether vitamin D supplementation to patients with tuberculosis could influence 25-hydroxyvitamin D (25(OH)D) and calcium serum levels. The results, after 28 days, the vitamin D supplementation showed significant increase of 25(OH)D serum level at the end point (p=0.001), but not for the calcium serum level (p=0.3). The Conclusions is supplementation with 1,000 IU vitamin D per day increased the 25(OH)D serum level but there was no association with the calcium serum level.

scholarly journals The Biological Activities of Vitamin D and Its Receptor in Relation to Calcium and Bone Homeostasis, Cancer, Immune and Cardiovascular Systems, Skin Biology, and Oral Health

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
R. A. G. Khammissa ◽  
J. Fourie ◽  
M. H. Motswaledi ◽  
R. Ballyram ◽  
J. Lemmer ◽  
...  
Keyword(s):  
Vitamin D ◽  
Calcium Homeostasis ◽  
Dna Sequences ◽  
Target Genes ◽  
Biological Activities ◽  
Biological Effects ◽  
Active Form ◽  
Vitamin D Supplementation ◽  
Biologically Active ◽  
Bone Homeostasis

Vitamin D plays an important role in calcium homeostasis and bone metabolism, with the capacity to modulate innate and adaptive immune function, cardiovascular function, and proliferation and differentiation of both normal and malignant keratinocytes. 1,25(OH)2D, the biologically active form of vitamin D, exerts most of its functions through the almost universally distributed nuclear vitamin D receptor (VDR). Upon stimulation by 1,25(OH)2D, VDR forms a heterodimer with the retinoid X receptor (RXR). In turn, VDR/RXR binds to DNA sequences termed vitamin D response elements in target genes, regulating gene transcription. In order to exert its biological effects, VDR signalling interacts with other intracellular signalling pathways. In some cases 1,25(OH)2D exerts its biological effects without regulating either gene expression or protein synthesis. Although the regulatory role of vitamin D in many biological processes is well documented, there is not enough evidence to support the therapeutic use of vitamin D supplementation in the prevention or treatment of infectious, immunoinflammatory, or hyperproliferative disorders. In this review we highlight the effects of 1,25(OH)2D on bone and calcium homeostasis, on cancer, and refer to its effects on the cardiovascular and immune systems.

scholarly journals Vitamin D and allergies

2013 ◽  
Vol 78 (3) ◽  
pp. 353-363
Author(s):  
Guro Gafvelin
Keyword(s):  
Vitamin D ◽  
Active Form ◽  
Treatment Strategies ◽  
Risk Groups ◽  
Serum Levels ◽  
Protective Role ◽  
Vitamin D Supplementation ◽  
Biologically Active ◽  
Allergen Specific Immunotherapy

An increasing amount of evidence has established that the biologically active form of vitamin D, 1,25-dihydroxy vitamin D3, possesses immunoregulatory properties. Vitamin D exerts its effects through binding to the nuclear vitamin D receptor (VDR), which is expressed by cells of the immune system. Most of the immunological effects mediated by vitamin D-VDR are regulatory, inhibiting adaptive immune responses. It has become apparent that the incidence of vitamin D insufficiency is surprisingly high in the general population. A link between low vitamin D serum levels and the increased prevalence of allergic diseases has been proposed. This possible connection has been investigated in numerous studies on associations between vitamin D serum concentrations and different allergic conditions, as well as studies on the effect of vitamin D supplementation. Although there is some evidence for a protective role of vitamin D in asthma, no consensus on the role of vitamin D in allergic disease has yet been reached. Still, treatment strategies involving vitamin D supplementation to risk groups, combinatorial corticosteroid and vitamin D treatment in asthma and vitamin D as an immunomodulator in allergen specific immunotherapy show promise for the future.

scholarly journals Vitamin D and Hospital Admission in Older Adults: A Prospective Association

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 616
Author(s):  
Avril Beirne ◽  
Kevin McCarroll ◽  
James Bernard Walsh ◽  
Miriam Casey ◽  
Eamon Laird ◽  
...  
Keyword(s):  
Older Adults ◽  
Vitamin D ◽  
Hospital Admission ◽  
Cross Sectional Study ◽  
Vitamin D Supplementation ◽  
Inverse Association ◽  
Cross Sectional ◽  
Prospective Association ◽  
Randomised Controlled

The health effects of vitamin D are well documented, with increasing evidence of its roles beyond bone. There is, however, little evidence of the effects of vitamin D on hospitalisation among older adults. This study aimed to prospectively determine the relationship of vitamin D status in older adults with hospital admission and emergency department (ED) attendance. Trinity University of Ulster Department of Agriculture (TUDA) is a large cross-sectional study of older adults with a community population from three disease-defined cohorts (cognitive dysfunction, hypertension, and osteoporosis). Participants included in this analysis were recruited between 2008 and 2012. ED and hospital admission data were gathered from the date of TUDA participation until June 2013, with a mean follow up of 3.6 years. Of the 3093 participants, 1577 (50.9%) attended the ED during the period of follow-up. Attendees had lower mean serum 25(OH)D concentrations than non-attendees (59.1 vs. 70.6 nmol/L). Fully adjusted models showed an inverse association between vitamin D and ED attendance (Hazard Ratio (HR) 0.996; 95% Confidence Interval (CI) 0.995–0.998; p < 0.001). A total of 1269 participants (41%) were admitted to hospital during the follow-up. Those admitted had lower mean vitamin D concentrations (58.4 vs. 69.3 nmol/L, p < 0.001). In fully adjusted models, higher vitamin D was inversely associated with hospital admission (HR 0.996; 95% CI 0.994–0.998; p < 0.001) and length of stay (LOS) (β = −0.95, p = 0.006). This study showed independent prospective associations between vitamin D deficiency and increased hospitalisation by older adults. The need for further evaluation of current recommendations in relation to vitamin D supplementation, with consideration beyond bone health, is warranted and should focus on randomised controlled trials.

scholarly journals Modifiable factors of vitamin D status among a Brazilian osteoporotic population attended a public outpatient clinic

2014 ◽  
Vol 58 (5) ◽  
pp. 572-582 ◽  
Author(s):  
Marília Brasilio Rodrigues Camargo ◽  
llda Sizue Kunii ◽  
Lilian Fukusima Hayashi ◽  
Patrícia Muszkat ◽  
Catherine Gusman Anelli ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vitamin D ◽  
Dietary Habits ◽  
Vitamin D Supplementation ◽  
Community Dwelling ◽  
Vitamin D Status ◽  
Mineral Density ◽  
Cross Sectional ◽  
Modifiable Factors ◽  
The Mean

Objectives To evaluate the serum 25-hydroxyvitamin D [25(OH)D] concentration in Brazilian osteoporotic patients and the modifiable factors of vitamin D status in this population. Subjects and methods In a cross-sectional study, 363 community-dwelling patients who sought specialized medical care were evaluated between autumn and spring in São Paulo, Brazil. Serum levels of 25(OH)D and parathormone (PTH), biochemical and anthropometric measurements, and bone density scans were obtained. The group was assessed using two questionnaires: one questionnaire covered lifestyle and dietary habits, skin phototype, sun exposure, medical conditions, and levels of vitamin D supplementation (cholecalciferol); the other questionnaire assessed health-related quality-of-life. Logistic regression and a decision tree were used to assess the association between the variables and the adequacy of vitamin D status. Results The mean age of the overall sample was 67.9 ± 8.6 years, and the mean 25(OH)D concentration was 24.8 ng/mL. The prevalence of inadequate vitamin D status was high (73.3%), although 81.5% of the subjects were receiving cholecalciferol (mean dose of 8,169 IU/week). 25(OH)D was positively correlated with femoral neck bone mineral density and negatively correlated with PTH. In the multivariate analysis, the dose of cholecalciferol, engagement in physical activity and the month of the year (September) were associated with improvement in vitamin D status. Conclusions In this osteoporotic population, vitamin D supplementation of 7,000 IU/week is not enough to reach the desired 25(OH)D concentration (≥ 30 ng/mL). Engagement in physical activity and the month of the year are modifiable factors of the vitamin D status in this population.

scholarly journals Influence of vitamin D binding protein polymorphism, demographics and lifestyle factors on vitamin D status of healthy Malaysian pregnant women

2020 ◽  
Author(s):  
Siew-Siew Lee ◽  
King-Hwa Ling ◽  
Maiza Tusimin ◽  
Raman Subramaniam ◽  
Kartini Farah Rahim ◽  
...  
Keyword(s):  
Vitamin D ◽  
Gene Polymorphism ◽  
Pregnant Women ◽  
Binding Protein ◽  
Lifestyle Factors ◽  
Vitamin D Supplementation ◽  
Dietary Vitamin ◽  
Vitamin D Binding Protein ◽  
Significant Positive Association ◽  
Cross Sectional

Abstract Background: Vitamin D deficiency (VDD) has been related to vitamin D binding protein (GC) gene polymorphism, demographics and lifestyle factors in different populations. However, previous studies only focused on demographic and lifestyle factors or genetic factors alone. Therefore, this cross-sectional study aimed to assess the association between GC gene polymorphism, demographics and lifestyle factors with VDD among Malaysian pregnant women. Method: Information on demographic characteristics, dietary vitamin D intake from supplement and food, time spent outdoors, skin type and clothing were collected using questionnaire. Plasma total 25-hydroxyvitamin D (25OHD) levels were measured using a Ultra-High-Performance Chromatography (UHPLC). Maternal GC single nucleotide polymorphisms (SNPs) (rs4588 and rs7041) were determined using restriction fragment length polymorphism (RFLP) technique. Results: Results showed that 50.2% of pregnant women were vitamin D deficient (25OHD <30 nmol/L). VDD (25OHD <30 nmol/L) was significantly associated with age, veiled clothing, maternal vitamin D intakes, from both food and supplements, and GC rs7041(and GC diplotypes). In contrast to previous studies that reported for non-pregnant population, significant positive association was found between CC genotype for SNP GC rs7041, GC 1s-1s and GC If-2 with risk of VDD (25OHD <30 nmol/L). Conclusions: The high prevalence of maternal VDD found in this study suggests the need for urgent development and implementation of vitamin D supplementation or fortification strategies to reduce VDD among pregnant women. The discrepancy in the association between GC rs7041 gene polymorphism and VDD reflects the variation in the factors associated with VDD in pregnancy compared to non-pregnant state

scholarly journals THE ROLE OF VITAMIN D SUPPLEMENTATION FOR HEAD AND NECK CANCER : A LITERATURE REVIEW

2019 ◽  
Vol 6 (1) ◽  
pp. 59
Author(s):  
Dewi Kania Intan Permatasari ◽  
Irna Sufiawati
Keyword(s):  
Quality Of Life ◽  
Vitamin D ◽  
Head And Neck Cancer ◽  
Literature Review ◽  
Head And Neck ◽  
Vitamin D Deficiency ◽  
Neck Cancer ◽  
Active Form ◽  
Vitamin D Supplementation

Background: Vitamin D has several roles, namely physiological function of calcium and bone metabolism, cell growth and differentiation, immune and cardiovascular function. Vitamin D deficiency can cause the risk of cancer. Head and neck cancer is one of the cancers that occur due to vitamin D deficiency in the body. This literature review was to asses and evaluate the impact and benefits of vitamin D supplementation for head and neck cancer.Discussion: A study found an association between vitamin D supplementation and a low risk of recurrence in conditions of high total vitamin D levels. Another study found a significant increase in quality of life (QOL). The primary mechanism of vitamin D action is mediated through binding of either 1,25(OH)2D3 (active form) or 25(OH)D (less active form) to the VDR, which is a member of the nuclear receptor superfamily of steroid and thyroid hormones with gene-regulatory and consequent anti-proliferative properties.Conclusions: Vitamin D supplementation provides a role in improving the condition of patients with head and neck cancer. Both in terms of suppressing recurrence and in terms of increasing quality of life

THE EFFECT OF 'CONCERN FOR OSTEOPOROSIS' AND SELF-PERCEIVED 'RISK OF OSTEOPOROSIS AND FRACTURE' ON ANTI-OSTEOPOROSIS BEHAVIOR OF POST MENOPAUSAL WOMEN- A CROSS-SECTIONAL STUDY.

2021 ◽  
pp. 28-31
Author(s):  
Deepali Srivastava ◽  
Sandeepa Srivastava ◽  
Ashish Kumar ◽  
Sanjiv Kumar
Keyword(s):  
Vitamin D ◽  
Risk Perception ◽  
Perceived Risk ◽  
Vitamin D Supplementation ◽  
Medical Advice ◽  
Vitamin Supplementation ◽  
Cross Sectional ◽  
Increased Risk ◽  
Bmd Testing ◽  
One Year

Introduction: Osteoporosis is more prevalent in women, especially following menopause. The total affected population would have been around 35 to 40 million. Morbidity due to disease includes decreased mobility, decreased quality of life, and increased risk of mortality following an osteoporotic fracture. The morbidity due to the disease may be decreased through diet, exercise, supplementation, and medication. The objective of this study is to determine the effect of 'concern for osteoporosis' and self-perceived 'risk of osteoporosis and fracture' on antiosteoporosis behaviour such as (1) calcium and vitamin D supplementation, (2) seeking medical advice, (3) undergoing bone mineral (BMD) testing, and (4) taking antiosteoporosis medication (AOM). Material And Method:The study was conducted on women attending outpatient clinic of the Obstretics and Gynaecology and Orthopaedics department. Patients were required to ll up the Global Longitudinal Osteoporosis in Women Questionnaire. Enrolled patients were contacted after one year by means of telephone calls, hospital visits and home visits and data was collected for self-reported use of supplements, self-reported seeking of medical advice regarding osteoporosis, self-reported BMD testing, and self-reported use of antiosteoporosis medications etc. Results:Total of 1562 women were enrolled for the study out of which data of only 1000 women was analyzed at end of one year. At the end of one year period 360 women reported use of Calcium and or Vitamin D. Table 4 depicts the association between the use of vitamin supplementation and concern and risk perception. Concern (P=0.61), risk perception to osteoporosis (P=0.13), and risk perception to fracture (P=0.29) were not signicantly associated with use of vitamin supplementation in the next 12 months (i.e., calcium and/or vitamin D). Concern (p= <0.001), risk perception to osteoporosis (p=<0.001), and risk perception to fracture (p=<0.001) were signicantly associated with women seeking medical care during the next one year. Concern (p=0.35) was not signicantly associated with undergoing BMD examination. Risk perception to osteoporosis (p=0.03) and risk perception to fracture (p=0.03) were signicantly associated with women undergoing BMD medical examination in one year. Concern about osteoporosis (p=0.64) was not signicantly associated with treatment with anti-osteoporotic medication. Risk perception to osteoporosis (p=0.06) and risk perception to fracture (p=0.002) were signicantly associated with women. Conclusion: Concern for osteoporosis is associated with likelihood of seeking medical advice. Perception of risk for Osteoporosis and fractures is positively associated with seeking medical advice, BMD examination and AOM treatment

scholarly journals Key Vitamin D Target Genes with Functions in the Immune System

Nutrients ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1140 ◽  
Author(s):  
Oona Koivisto ◽  
Andrea Hanel ◽  
Carsten Carlberg
Keyword(s):  
Vitamin D ◽  
Adaptive Immunity ◽  
Vitamin D3 ◽  
Target Genes ◽  
Mononuclear Cells ◽  
Active Form ◽  
Biologically Active ◽  
Monocytic Cell ◽  
Monocytic Cell Line ◽  
Innate And Adaptive Immunity

The biologically active form of vitamin D3, 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3), modulates innate and adaptive immunity via genes regulated by the transcription factor vitamin D receptor (VDR). In order to identify the key vitamin D target genes involved in these processes, transcriptome-wide datasets were compared, which were obtained from a human monocytic cell line (THP-1) and peripheral blood mononuclear cells (PBMCs) treated in vitro by 1,25(OH)2D3, filtered using different approaches, as well as from PBMCs of individuals supplemented with a vitamin D3 bolus. The led to the genes ACVRL1, CAMP, CD14, CD93, CEBPB, FN1, MAPK13, NINJ1, LILRB4, LRRC25, SEMA6B, SRGN, THBD, THEMIS2 and TREM1. Public epigenome- and transcriptome-wide data from THP-1 cells were used to characterize these genes based on the level of their VDR-driven enhancers as well as the level of the dynamics of their mRNA production. Both types of datasets allowed the categorization of the vitamin D target genes into three groups according to their role in (i) acute response to infection, (ii) infection in general and (iii) autoimmunity. In conclusion, 15 genes were identified as major mediators of the action of vitamin D in innate and adaptive immunity and their individual functions are explained based on different gene regulatory scenarios.

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