Fatty fish intake is associated with decreased occurrence of multiple sclerosis

Background: High vitamin D levels have been associated with a decreased risk of developing multiple sclerosis (MS). The most important source of dietary vitamin D is fatty fish. Objective: The objective of this paper is to investigate the association between fish consumption and the risk of MS, including the interaction between fish intake and ultraviolet radiation (UVR) exposure habits. Methods: This study is based on the project Epidemiological Investigation of MS (EIMS), which is a Swedish population-based case-control study. The analysis included 1879 incident cases of MS and 4135 controls. Subjects who reported high fatty fish intake were compared regarding occurrence of MS with those who reported low intake by calculating odds ratio (OR) with 95% confidence interval (CI). Results: Frequent fatty fish intake was associated with decreased occurrence of MS (adjusted OR 0.82 (95% CI 0.68-0.98). There was no significant association between intake of lean fish and MS. Conclusion: Fatty fish intake might decrease the risk for MS. A hypothetical explanation is that intake of fatty fish may compensate for vitamin D deficiency that is associated with increased MS risk.

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Polymorphisms in vitamin D metabolism related genes and risk of multiple sclerosis

Multiple Sclerosis Journal ◽

10.1177/1352458509355069 ◽

2009 ◽

Vol 16 (2) ◽

pp. 133-138 ◽

Cited By ~ 88

Author(s):

K. Claire Simon ◽

Kassandra L Munger ◽

Xing Yang ◽

Alberto Ascherio

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Conditional Logistic Regression ◽

Dietary Vitamin ◽

Environment Interaction ◽

Nucleotide Polymorphisms ◽

Vitamin D Metabolism ◽

Logistic Regression Models ◽

Gene Environment ◽

Vitamin D Levels

The extent to which potential genetic determinants of vitamin D levels may be related to multiple sclerosis (MS) risk has not been thoroughly explored. The objective of this study was to determine whether polymorphisms in VDR, CYP27B1, CYP24A1, CYP2R1 and DBP are associated with the risk of MS and whether these variants may modify associations between environmental or dietary vitamin D on MS risk. A nested case-control study was conducted in two, large cohorts of US nurses, including 214 MS cases and 428 age-matched controls. Conditional logistic regression models were used to calculate relative risks (RR) and 95% confidence intervals (CIs) and to assess the significance of gene—environment interactions. No associations were observed for any of the single-nucleotide polymorphisms (SNPs) in VDR, CYP27B1, CYP24A1, CYP2R1 or DBP (p > 0.05 for all). The authors did observe an interaction (p = 0.04) between dietary intake of vitamin D and the vitamin D receptor FokI polymorphism on MS risk. The protective effect of increasing vitamin D was evident only in individuals with the ‘ff ’ genotype (RR = 0.2, 95% CI: 0.06, 0.78; p = 0.02 for 400 IU/day increase). It was concluded that this does not support a role for the selected SNPs involved in vitamin D metabolism in the etiology of MS. The finding of a marginally significant gene—environment interaction requires replication in larger datasets, but suggests future genetic studies may benefit from considering relevant environmental context.

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The increased risk of multiple sclerosis associated with HLA-DRB1*15:01 and smoking is modified by alcohol consumption

Scientific Reports ◽

10.1038/s41598-021-00578-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Anna Karin Hedström ◽

Tomas Olsson ◽

Lars Alfredsson

Keyword(s):

Multiple Sclerosis ◽

Alcohol Consumption ◽

Human Leukocyte ◽

Population Based ◽

Inverse Association ◽

Swedish Population ◽

Logistic Regression Models ◽

Leukocyte Antigen ◽

Increased Risk ◽

Incident Cases

AbstractPrevious studies have observed an inverse association between alcohol consumption and multiple sclerosis (MS) risk. We aimed to investigate possible interactions between alcohol consumption, MS-associated human leukocyte antigen (HLA) genes and smoking regarding MS risk. We used a Swedish population-based case–control study (2059 incident cases, 2887 controls) matched by age, sex, and residential area. Subjects with different genotypes and alcohol consumption habits were compared regarding MS risk, by calculating odds ratios with 95% confidence intervals using logistic regression models. Interaction on the additive scale between non-drinking and both genotype and smoking were assessed by calculating the attributable proportion due to interaction (AP). There was a dose-dependent inverse association between alcohol consumption and MS risk (p for trend < 0.0001). A potentiating effect was observed between non-drinking and presence of DRB1*15:01 (AP 0.3, 95% CI 0.2–0.5) which was of similar magnitude irrespective of smoking habits. Non-drinking also interacted with smoking to increase MS risk (AP 0.2, 95% CI 0.06–0.4). Non-drinking interacts with DRB1*15:01 and smoking to increase the risk of MS. Better understanding of the mechanisms behind our findings may help to define ways to achieve protection against MS by other means than alcohol consumption.

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Environmental and Genetic Determinants of Serum 25(OH)-Vitamin D Levels during Pregnancy and Early Childhood

Children ◽

10.3390/children6100116 ◽

2019 ◽

Vol 6 (10) ◽

pp. 116

Author(s):

Ann-Marie Malby Schoos ◽

Cecilie Vinther ◽

Sarah Nørgaard ◽

Nicklas Brustad ◽

Jakob Stokholm ◽

...

Keyword(s):

Vitamin D ◽

Early Childhood ◽

Population Based ◽

Vitamin D Insufficiency ◽

Dietary Vitamin ◽

Genetic Determinants ◽

Vitamin D Levels ◽

25 Oh Vitamin D ◽

Age At Birth ◽

Older Siblings

Vitamin D insufficiency has become a common health problem worldwide, particularly among pregnant women and young children. Therefore, we sought to identify environmental, dietary, and genetic determinants of serum 25(OH)-vitamin D (25(OH)D) levels during pregnancy and early childhood. 25(OH)D was measured in women at 24-weeks of gestation (n = 738) and one-week postpartum (n = 284) in the population-based Danish COPSAC2010 mother–child cohort; and in cord blood (n = 257) and age 4 years (n = 298) in children from the at-risk COPSAC2000 mother–child cohort. Environmental, dietary, and genetic variables were tested for association with 25(OH)D using linear regression analyses. After adjusting for season of blood sampling, determinants of lower 25(OH)D levels during pregnancy in the women were higher pre-pregnancy BMI, lower age at birth, lower genetic vitamin D score, lower dietary vitamin D intake, and lower social circumstances. In children, the determinants were lower maternal age at birth, higher pre-pregnancy BMI, lower genetic vitamin D score, older siblings, exposure to tobacco smoking, and female sex. Genetics was an important determinant at all time points, alone explaining 2%–11% of the variance in 25(OH)D. Important determinants of circulating 25(OH)D levels during pregnancy and early childhood include environmental factors, diet, and to a large extent genetics.

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Low sun exposure increases multiple sclerosis risk both directly and indirectly

Journal of Neurology ◽

10.1007/s00415-019-09677-3 ◽

2019 ◽

Vol 267 (4) ◽

pp. 1045-1052 ◽

Cited By ~ 5

Author(s):

Anna Karin Hedström ◽

Tomas Olsson ◽

Ingrid Kockum ◽

Jan Hillert ◽

Lars Alfredsson

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Vitamin D Deficiency ◽

Sun Exposure ◽

Population Based ◽

Total Effect ◽

Mediation Effect ◽

Vitamin D Status ◽

Case Control Studies ◽

Vitamin D Levels

Abstract Objective We aimed to study (1) to what extent the influence of low sun exposure on multiple sclerosis (MS) risk is mediated by low vitamin D levels; (2) whether low sun exposure or vitamin D deficiency act synergistically with HLA-DRB1*15:01 and absence of HLA-A*02:01. Methods We used two population-based case–control studies (7069 cases, 6632 matched controls). Subjects with different HLA alleles, sun exposure habits and vitamin D status were compared regarding MS risk, by calculating odds ratios (OR) with 95% confidence intervals (CI) employing logistic regression. Mediation analysis was used to identify the potential mediation effect of vitamin D on the relationship between low sun exposure and MS risk. Results Low sun exposure increased MS risk directly as well as indirectly, by affecting vitamin D status. The direct effect, expressed as OR, was 1.26 (95% CI 1.04–1.45) and the indirect effect, mediated by vitamin D deficiency, was 1.10 (95% CI 1.02–1.23). Of the total effect, nearly 30% was mediated by vitamin D deficiency. There was a significant interaction between low sun exposure and vitamin D deficiency (attributable proportion due to interaction 0.3, 95% CI 0.04–0.5) accounting for about 12% of the total effect. Further, both factors interacted with HLA-DRB1*15:01 to increase MS risk. Interpretation Our findings indicate that low sun exposure acts both directly on MS risk as well as indirectly, by leading to low vitamin D levels. The protective effect of sun exposure thus seems to involve both vitamin D and non-vitamin D pathways, which is of relevance for prevention, in particular for those with a genetic susceptibility to MS.

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VITAMIN D LEVELS, VITAMIN D INTAKE AND SUNLIGHT EXPOSURE IN PEDIATRIC MULTIPLE SCLEROSIS

Neuropediatrics ◽

10.1055/s-2006-945647 ◽

2006 ◽

Vol 37 (S 1) ◽

Author(s):

R Hung ◽

R Vieth ◽

R Goldman ◽

E Sochett ◽

B Banwell

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Sunlight Exposure ◽

Pediatric Multiple Sclerosis ◽

Vitamin D Intake ◽

Vitamin D Levels

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Reduction in circulating vitamin D binding protein in patients with multiple sclerosis

BMC Neurology ◽

10.1186/s12883-021-02200-0 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Zhila Maghbooli ◽

Abolfazl Omidifar ◽

Tarlan Varzandi ◽

Tayebeh Salehnezhad ◽

Mohammad Ali Sahraian

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Binding Protein ◽

Serum Levels ◽

Causative Role ◽

Vitamin D Binding Protein ◽

Control Groups ◽

Current Case ◽

Vitamin D Levels ◽

And Control

Abstract Background In this study, we aimed to determine the risk association between vitamin D binding protein (VDBP) polymorphism in patients with multiple sclerosis (MS) in a MS biobank and the difference in VDBP serum levels in MS patients who were recently diagnosed. Method The current case-control study was performed on 296 MS patients and 313 controls. Thereafter, two common missense VDBP polymorphisms, named rs7041and rs4588, were evaluated in all the participants. Serum levels of vitamin D and vitamin D binding protein were assessed in 77 MS patients who were diagnosed since one year ago and in 67 healthy people who were matched in terms of age and sex. Result The frequency distributions of VDBP genotypes and alleles of SNP rs7041 and rs4588 were observed to be similar in both the MS and control groups (p > 0.05). The VDBP haplotypes, as Gc2/Gc2, Gc1/Gc1, and Gc1/Gc2, were found to be similar in the MS and control groups (p > 0.05). In subgroup analysis, circulating VDBP was lower in MS patients (Ln-VDBP (μgr/ml): 3.64 ± 0.91 vs. 5.31 ± 0.77, p = 0.0001) even after adjusting for vitamin D levels, body mass index, and taking vitamin D supplement. There was no significant association between VDBP haplotypes and vitamin D levels in the two groups. Conclusion The present study suggested an association between lower levels of circulating VDBP and multiple sclerosis in newly diagnosed patients. However, the VDBP causative role in the development of MS is still unclear, so it needs more studies.

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Dietary Data in the Malmö Offspring Study–Reproducibility, Method Comparison and Validation against Objective Biomarkers

Nutrients ◽

10.3390/nu13051579 ◽

2021 ◽

Vol 13 (5) ◽

pp. 1579

Author(s):

Sophie Hellstrand ◽

Filip Ottosson ◽

Einar Smith ◽

Louise Brunkwall ◽

Stina Ramne ◽

...

Keyword(s):

Fruits And Vegetables ◽

Method Comparison ◽

Principal Component ◽

Fish Intake ◽

Dietary Intakes ◽

Food Groups ◽

Food Record ◽

Fatty Fish ◽

Lean Fish ◽

Β Carotene

Irregular dietary intakes impairs estimations from food records. Biomarkers and method combinations can be used to improve estimates. Our aim was to examine reproducibility from two assessment methods, compare them, and validate intakes against objective biomarkers. We used the Malmö Offspring Study (55% women, 18–71 y) with data from a 4-day food record (4DFR) and a short food frequency questionnaire (SFFQ) to compare (1) repeated intakes (n = 180), (2) intakes from 4DFR and SFFQ (n = 1601), and (3) intakes of fatty fish, fruits and vegetables, and citrus with plasma biomarkers (n = 1433) (3-carboxy-4-methyl-5-propyl-2-furanpropanoic acid [CMPF], β-carotene and proline betaine). We also combined 4DFR and SFFQ estimates using principal component analysis (PCA). Moderate correlations were seen between repeated intakes (4DFR median ρ = 0.41, SFFQ median ρ = 0.59) although lower for specific 4DFR-items, especially fatty/lean fish (ρ ≤ 0.08). Between-method correlations (median ρ = 0.33) were higher for intakes of overall food groups compared to specific foods. PCA scores for citrus (proline betaine ρ = 0.53) and fruits and vegetables (β-carotene: ρ = 0.39) showed the highest biomarker correlations, whereas fatty fish intake from the SFFQ per se showed the highest correlation with CMPF (ρ = 0.46). To conclude, the reproducibility of SFFQ data was superior to 4DFR data regarding irregularly consumed foods. Method combination could slightly improve fruit and vegetable estimates, whereas SFFQ data gave most valid fatty fish intake.

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Comparison of Antioxidant Status and Vitamin D Levels between Multiple Sclerosis Patients and Healthy Matched Subjects

Multiple Sclerosis International ◽

10.1155/2014/539854 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

Ehsan Hejazi ◽

Reza Amani ◽

Naser SharafodinZadeh ◽

Bahman Cheraghian

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Dietary Intake ◽

Antioxidant Status ◽

Sun Exposure ◽

Total Antioxidant Status ◽

Serum Levels ◽

Study Groups ◽

Vitamin D Levels ◽

Multiple Sclerosis Patients

Objective. The aim of the present study was to compare the serum levels of total antioxidant status (TAS) and 25(OH) D3 and dietary intake of multiple sclerosis (MS) patients with those of normal subjects.Method. Thirty-seven MS patients (31 women) and the same number of healthy matched controls were compared for their serum levels and dietary intake of 25(OH) D3 and TAS. Sun exposure and the intake of antioxidants and vitamin D rich foods were estimated through face-to-face interview and food frequency questionnaire.Results. Dietary intake of antioxidants and vitamin D rich foods, vitamin C, vitamin A, and folate was not significantly different between the two groups. There were also no significant differences in the mean levels of 25(OH) D3 and TAS between the study groups. Both groups had low serum levels of 25(OH) D3 and total antioxidants.Conclusion. No significant differences were detected in serum levels and dietary intake of vitamin D and antioxidants between MS patients and healthy controls. All subjects had low antioxidant status and vitamin D levels.

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Past environmental sun exposure and risk of multiple sclerosis: a role for the Cdx-2 Vitamin D receptor variant in this interaction

Multiple Sclerosis Journal ◽

10.1177/1352458509102459 ◽

2009 ◽

Vol 15 (5) ◽

pp. 563-570 ◽

Cited By ~ 61

Author(s):

JL Dickinson ◽

DI Perera ◽

AF van der Mei ◽

A-L Ponsonby ◽

AM Polanowski ◽

...

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Vitamin D Receptor ◽

Significant Interaction ◽

Important Determinant ◽

Sun Exposure ◽

Population Based ◽

Vdr Gene ◽

Increased Risk ◽

Group 2

Multiple studies have provided evidence for an association between reduced sun exposure and increased risk of multiple sclerosis (MS), an association likely to be mediated, at least in part, by the vitamin D hormonal pathway. Herein, we examine whether the vitamin D receptor ( VDR), an integral component of this pathway, influences MS risk in a population-based sample where winter sun exposure in early childhood has been found to be an important determinant of MS risk. Three polymorphisms within the VDR gene were genotyped in 136 MS cases and 235 controls, and associations with MS and past sun exposure were examined by logistic regression. No significant univariate associations between the polymorphisms, rs11574010 ( Cdx-2A > G), rs10735810 ( Fok1T > C), or rs731236 ( Taq1C > T) and MS risk were observed. However, a significant interaction was observed between winter sun exposure during childhood, genotype at rs11574010, and MS risk ( P = 0.012), with the ‘G’ allele conferring an increased risk of MS in the low sun exposure group (≤2 h/day). No significant interactions were observed for either rs10735810 or rs731236, after stratification by sun exposure. These data provide support for the involvement of the VDR gene in determining MS risk, an interaction likely to be dependent on past sun exposure.

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