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Giatraki V, Galanakis E, Perdikogianni C. Role of Vitamin D and Vitamin D Polymorphisms in COVID-19 Risk and Severity in Children: A Systematic Review. Cureus 2024; 16:e61326. [PMID: 38947671 PMCID: PMC11213648 DOI: 10.7759/cureus.61326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2024] [Indexed: 07/02/2024] Open
Abstract
The role of vitamin D in the susceptibility to coronavirus disease 2019 (COVID-19) disease has been investigated since the beginning of the pandemic, but there is still scarce data on children. We investigated the impact of vitamin D status and the related genetic variants on COVID-19 vulnerability and severity of the disease in children. A systematic review was performed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, to identify reports on vitamin D status and genetic polymorphisms, their association with the susceptibility of children to COVID-19 and multisystem inflammatory syndrome in children (MIS-C), and the effect of supplementation on the clinical course. Of an initial total of 279 articles, 26 studies, published between September 2020 and May 2023, were finally included in this review according to inclusion criteria. Quantitative data provided by 11 studies revealed that 43.05% of pediatric COVID-19 patients had low vitamin D levels. Mean serum 25(OH)D levels were observed to be significantly low in COVID-19 cases, with an estimated pooled mean value of 17 ng/mL, as provided by 16 studies. Vitamin D deficiency and the vitamin D receptor (VDR) FokI polymorphism may suggest independent risk factors for susceptibility to COVID-19 in the pediatric population. The 25(OH)D level may constitute a significant biomarker associated with the COVID-19 severity and MIS-C. While supplementation of COVID-19 cases with vitamin D showed favorable results, the effect on the outcome of the disease remains uncertain.
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Affiliation(s)
- Victoria Giatraki
- Department of Paediatrics & Laboratory of Child Health, Medical School University of Crete, Heraklion, GRC
| | - Emmanouil Galanakis
- Department of Paediatrics & Laboratory of Child Health, Medical School University of Crete, Heraklion, GRC
| | - Chrysoula Perdikogianni
- Department of Paediatrics & Laboratory of Child Health, Medical School University of Crete, Heraklion, GRC
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Iriani A, Rachman A, Fatina MK, Gemilang RK, Trisnandi A, Nugraha MFI. Gene expression profiling of vitamin D metabolism enzymes in leukemia and lymphoma patients: molecular aspect interplay of VDR, CYP2R1, and CYP24A1. Mol Biol Rep 2024; 51:526. [PMID: 38632160 DOI: 10.1007/s11033-024-09432-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 03/08/2024] [Indexed: 04/19/2024]
Abstract
BACKGROUND Vitamin D deficiency is prevalent among the Indonesian population, particularly in individuals diagnosed with leukemia-lymphoma. The regulation of vitamin D metabolism is influenced by the expression of several enzymes, such as CYP2R1, CYP24A1, and the vitamin D receptor (VDR). This study aimed to scrutinize the gene expression profiles in both mRNA and protein levels of VDR, CYP2R1, and CYP24A1 in leukemia and lymphoma patients. METHOD The research was a cross-sectional study conducted at Cipto Mangunkusumo Hospital (RSCM) in Jakarta, Indonesia. The study included a total of 45 patients aged over 18 years old who have received a diagnosis of lymphoma or leukemia. Vitamin D status was measured by examining serum 25 (OH) D levels. The analysis of VDR, CYP2R1, and CYP24A1 mRNA expression utilized the qRT-PCR method, while protein levels were measured through the ELISA method. CONCLUSION The study revealed a noteworthy difference in VDR protein levels between men and women. The highest mean CYP24A1 protein levels were observed in the age group > 60 years. This study found a significant, moderately positive correlation between VDR protein levels and CYP24A1 protein levels in the male and vitamin D sufficiency groups. In addition, a significant positive correlation was found between VDR mRNA levels and CYP2R1 mRNA levels, VDR mRNA levels and CYP2R1 mRNA levels, and CYP2R1 mRNA levels and CYP24A1 mRNA levels. However, the expression of these genes does not correlate with the protein levels of its mRNA translation products in blood circulation.
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Affiliation(s)
- Anggraini Iriani
- Department of Clinical Pathology, Faculty of Medicine, Yarsi University, Yarsi Hospital, Jl. Letjen Suprapto Kav 13, Cempaka Putih, Jakarta, 10510, Indonesia.
| | - Andhika Rachman
- Department of Hematology Oncology, Faculty of Medicine, Cipto Manguskusumo Hospital, Jakarta, Indonesia
| | | | | | | | - Media Fitri Isma Nugraha
- Research Center for Pharmaceutical Ingredients and Traditional Medicine, National Research and Innovation Agency, Cibinong, Indonesia
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Oubouchou R, -Djeraba ZAA, Kemikem Y, Otmani F, Touil-Boukoffa C. Immunomodulatory effect of vitamin D supplementation on Behçet's disease patients: effect on nitric oxide and Th17/Treg cytokines production. Immunopharmacol Immunotoxicol 2024; 46:1-10. [PMID: 37535442 DOI: 10.1080/08923973.2023.2239490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 07/17/2023] [Indexed: 08/05/2023]
Abstract
INTRODUCTION In the last decade, an immuno-modulatory effect of vitamin D supplementation have emerged as a potential therapeutic approach for some inflammatory and autoimmune diseases. As previously reported, vitamin D deficiency was strongly linked to several diseases as Behçet's disease (BD). BD is a chronic systemic inflammatory disorder with autoimmunity, genetic and environmental factors involvement. The aim of our current study is to set up a new therapeutic strategy in BD, combining conventional therapy and vitamin D supplementation. MATERIALS AND METHODS Blood samples were collected from active and inactive BD patients and healthy controls (HC) to evaluate 25(OH) vitamin D levels using an electrochemiluminescence method. All deficient and insufficient vitamin D BD patients' were supplemented with vitamin D3 (CHOLECALCIFEROL, 200 000 UI/1 ml). In this context, NO, IL-17A and IL-10 levels were evaluated in patients and HC in vivo and ex vivo using Griess and ELISA methods respectively. RESULTS Before supplementation, we noted with interest that BD patients had vitamin D deficiency, associated with elevated in vivo and ex vivo NO and IL-17A levels compared to HC. Conversely, low IL-10 levels were observed in the same BD patients in comparison to HC. Interestingly, restored vitamin D status in supplemented BD patients was related to the decreased NO levels. In the same way, the IL-10/IL-17A ratio was improved. CONCLUSIONS Collectively, our data suggest that vitamin D supplementation in combination with conventional treatments has a beneficial effect and could constitute a good therapeutic candidate for alleviating inflammatory responses during Behçet disease.
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Affiliation(s)
- Randa Oubouchou
- Cytokines and NO Synthases Team, Laboratory of Cellular and Molecular Biology (LBCM), Biological Sciences Faculty, University of Sciences and Technology Houari Boumediene (USTHB), Algiers, Algeria
| | - Zineb Ait Arab -Djeraba
- Cytokines and NO Synthases Team, Laboratory of Cellular and Molecular Biology (LBCM), Biological Sciences Faculty, University of Sciences and Technology Houari Boumediene (USTHB), Algiers, Algeria
| | - Yassmine Kemikem
- Internal medicine service at Mustapha Bacha Hospital, Algiers, Algeria
| | - Fifi Otmani
- Internal medicine service at Mustapha Bacha Hospital, Algiers, Algeria
| | - Chafia Touil-Boukoffa
- Cytokines and NO Synthases Team, Laboratory of Cellular and Molecular Biology (LBCM), Biological Sciences Faculty, University of Sciences and Technology Houari Boumediene (USTHB), Algiers, Algeria
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Asghari G, Yuzbashian E, Nikparast A, Najd Hassan Bonab L, Mahdavi M, Daneshpour MS, Hosseinpanah F, Mirmiran P. Impact of daily vitamin D 3 supplementation on the risk of vitamin D deficiency with the interaction of rs2282679 in vitamin D binding protein gene (GC) among overweight and obese children and adolescents: A one-year randomized controlled trial. Front Nutr 2022; 9:1061496. [PMID: 36579074 PMCID: PMC9792175 DOI: 10.3389/fnut.2022.1061496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 11/11/2022] [Indexed: 12/14/2022] Open
Abstract
Background The rs2282679 polymorphism in the vitamin D binding protein (DBP) gene may influence the response to vitamin D supplementation. Therefore, we examine the effect of 1-year vitamin D supplementation on vitamin D deficiency (VDD) with the interaction of rs2282679 polymorphism in overweight and obese children and adolescents. Materials and methods The participants (n = 300) were part of a randomized controlled trial who received a daily supplement of either 1,000 or 2,000 IU or four supplements of 1,000 IU weekly (equal to 600 IU daily) of vitamin D3 for 12 months. Genotyping was performed using amplification refractory mutation system polymerase chain reaction (ARMS-PCR). Results The mean of 25(OH)D values at baseline for participants with the TT, TG, and GG genotypes were 15.4, 14.4, and 10.8 ng/mL, respectively, and were not different between the three genotype groups (P = 0.062). A significant reduction in VDD was observed after vitamin D supplementation with dosages of 1,000 or 2,000 IU compared to 600 IU. No significant association of genotypes with risk of VDD was observed in each intervention group after vitamin D supplementation, except, that individuals with TG genotype showed a higher risk of VDD compared to those with TT genotype in the 2,000 IU group after 6 months of supplementation [odds ratio (95% CI): 6.94; 1.30-37.02]. We observed no interaction between time duration, three genotypes, and dosages with serum 25(OH)D, calcium, phosphorus, alkaline phosphatase, and parathyroid hormone levels. Conclusion Response to vitamin D supplementation by three doses of 600, 1,000, and 2,000 IU could not be affected by rs2282679 polymorphism during 12 months in overweight and obese children and adolescents.
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Affiliation(s)
- Golaleh Asghari
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Emad Yuzbashian
- Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Department of Agricultural, Food and Nutritional Sciences, University of Alberta, Edmonton, AB, Canada
| | - Ali Nikparast
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Najd Hassan Bonab
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Mahdavi
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam S. Daneshpour
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farhad Hosseinpanah
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Farhad Hosseinpanah,
| | - Parvin Mirmiran
- Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran,*Correspondence: Parvin Mirmiran, ;
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Silva ICJ, Lazaretti-Castro M. Vitamin D metabolism and extraskeletal outcomes: an update. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2022; 66:748-755. [PMID: 36382764 PMCID: PMC10118817 DOI: 10.20945/2359-3997000000565] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Vitamin D deficiency is a general health problem affecting individuals at all stages of life and on different continents. The musculoskeletal effects of vitamin D are well known. Its deficiency causes rickets, osteomalacia, and secondary hyperparathyroidism and increases the risk of fractures. Clinical and experimental evidence suggests that vitamin D performs multiple extraskeletal functions. Several tissues unrelated to calcium and phosphate metabolism express vitamin D receptor (VDR) and are directly or indirectly influenced by 1,25(OH)2D (calcitriol). Some also express the enzyme 1 alpha-hydroxylase (CYP27B1) and produce 1,25(OH)2D, inducing autocrine or paracrine effects. Among the pleiotropic effects of vitamin D are the regulation of cell proliferation and differentiation, hormone secretion, and immune function. In this review, we outline vitamin D physiology and the outcomes of recent large RCTs on its potential extraskeletal effects. Those studies exhibit a need for continued clinical analysis to elucidate whether vitamin D status can influence extraskeletal health. Longer longitudinal follow-up and standardized assays are crucial to better assess potential outcomes.
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Maciejewski A, Lacka K. Vitamin D-Related Genes and Thyroid Cancer-A Systematic Review. Int J Mol Sci 2022; 23:13661. [PMID: 36362448 PMCID: PMC9658610 DOI: 10.3390/ijms232113661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 10/29/2023] Open
Abstract
Vitamin D, formerly known for its role in calcium-phosphorus homeostasis, was shown to exert a broad influence on immunity and on differentiation and proliferation processes in the last few years. In the field of endocrinology, there is proof of the potential role of vitamin D and vitamin D-related genes in the pathogenesis of thyroid cancer-the most prevalent endocrine malignancy. Therefore, the study aimed to systematically review the publications on the association between vitamin D-related gene variants (polymorphisms, mutations, etc.) and thyroid cancer. PubMed, EMBASE, Scopus, and Web of Science electronic databases were searched for relevant studies. A total of ten studies were found that met the inclusion criteria. Six vitamin D-related genes were analyzed (VDR-vitamin D receptor, CYP2R1-cytochrome P450 family 2 subfamily R member 1, CYP24A1-cytochrome P450 family 24 subfamily A member 1, CYP27B1-cytochrome P450 family 27 subfamily B member 1, DHCR7-7-dehydrocholesterol reductase and CUBN-cubilin). Moreover, a meta-analysis was conducted to summarize the data from the studies on VDR polymorphisms (rs2228570/FokI, rs1544410/BsmI, rs7975232/ApaI and rs731236/TaqI). Some associations between thyroid cancer risk (VDR, CYP24A1, DHCR7) or the clinical course of the disease (VDR) and vitamin D-related gene polymorphisms were described in the literature. However, these results seem inconclusive and need validation. A meta-analysis of the five studies of common VDR polymorphisms did not confirm their association with increased susceptibility to differentiated thyroid cancer. Further efforts are necessary to improve our understanding of thyroid cancer pathogenesis and implement targeted therapies for refractory cases.
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Affiliation(s)
| | - Katarzyna Lacka
- Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, 60355 Poznan, Poland
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Variability in response to vitamin D supplementation according to vitamin D metabolism related gene polymorphisms in healthy adults. Eur J Clin Nutr 2022; 77:189-194. [PMID: 36167979 PMCID: PMC9514197 DOI: 10.1038/s41430-022-01218-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/23/2022] [Accepted: 09/14/2022] [Indexed: 11/09/2022]
Abstract
OBJECTIVE The aim of this study was to determine the influence of polymorphisms in some key gene actors of the vitamin D (vitD) metabolic pathway on supplementation efficacy. METHODS In total, 245 healthy participants were recruited from occupational medicine service in Sahloul University Hospital with vitD deficiency [25(OH)D ≤ 30 ng/ml]. After giving an informed consent, all participants were asked to complete a generalized questionnaire and to follow a detailed personalized supplementation protocol. Genetic study was performed by PCR-RFLP for 15 single nucleotide polymorphisms (SNPs) belonging to DBP, CYP2R1, CYP27B14, CYP24A1 and VDR genes. Statistical study was carried out with SPSS23.0. RESULTS Among the studied SNPs, non-response was significantly associated with variant alleles of rs4588 (OR* = 11.51; p < 0.001), rs10766197 (OR* = 6.92; p = 0.008) and rs12794714 (OR* = 5.09; p = 0.004). These three SNPs contributed in 18.8% in response variability with rs4588 being the most influential (10.3%). There was a significant linear negative correlation between baseline 25(OH)D and post supplementation 25(OH)D concentration (r = -0.437; p < 0.001) as well as a linear negative association between the increase in 25(OH)D concentration and GRS (GRS: genetic risk score = the sum of risk alleles) (r = -0.149; p = 0.033). CONCLUSIONS DBP-rs4588, CYP2R1-rs10766197 and rs12794714 variants are associated with variations in serum 25(OH)D concentrations and efficacy of response to vitD supplementation in Tunisian adults. Taking into account these variations can help to better adapt vitD intake to ensure a higher response to supplementation.
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Jordan T, Siuka D, Rotovnik NK, Pfeifer M. COVID-19 and Vitamin D- a Systematic Review. Zdr Varst 2022; 61:124-132. [PMID: 35432612 PMCID: PMC8937591 DOI: 10.2478/sjph-2022-0017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 02/22/2022] [Indexed: 12/22/2022] Open
Abstract
Introduction The COVID-19 pandemic has strongly affected global healthcare systems. Prior epidemiological studies on different infectious diseases have shown a strong correlation between serum vitamin D levels and the incidence of certain infectious diseases. Vitamin D has an important immunomodulatory effect on innate immunity and exhibits several other mechanisms in the pathogenesis of the cytokine storm, which is one of the main contributing factors to fatality in COVID-19 patients. Methods A keyword search was conducted in the PubMed and Google Scholar research databases. The abstracts and/or full texts of selected papers were further evaluated. Articles that fulfilled the inclusion criteria were included in the systematic review. Results The 28 studies summarized in this review provide observational findings that vitamin D levels are related to the incidence, severity, and mortality rate of COVID-19 infection. The literature does not suggest that COVID-19 could be eliminated with supplementation of vitamin D, but there are implications that vitamin D deficiency might increase the risk for COVID-19 infection and severity of the disease progression. Discussion Current literature and several guidelines support the supplementation of vitamin D as a reasonable strategy for correcting and preventing vitamin D deficiency. The recommended dose for maintaining normal 25(OH)D levels by consensus is 1000 to 2000 IU vitamin D daily for at-risk teens and adults. Conclusion Vitamin D supplementation might play an important role in protecting from acute respiratory infections like the SARS CoV2, and in high-risk individuals with COVID 19 from progressing to critical clinical condition and reducing mortality.
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Affiliation(s)
- Taja Jordan
- University Medical Centre Ljubljana, Department for Radiology, Zaloška c. 7, 1000Ljubljana, Slovenia
| | - Darko Siuka
- University Medical Centre Ljubljana, Department for Gastroenterology, Zaloška c. 7, 1000Ljubljana, Slovenia
| | - Nada Kozjek Rotovnik
- University of Ljubljana, Faculty of Medicine, Vrazov trg 2, 1000Ljubljana, Slovenia
- Institute of Oncology Ljubljana, Department for Clinical Nutrition, Zaloška c. 2, 1000LjubljanaSlovenia
| | - Marija Pfeifer
- University of Ljubljana, Faculty of Medicine, Vrazov trg 2, 1000Ljubljana, Slovenia
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Sunlight, dietary habits, genetic polymorphisms and vitamin D deficiency in urban and rural infants of Bangladesh. Sci Rep 2022; 12:3623. [PMID: 35256680 PMCID: PMC8901932 DOI: 10.1038/s41598-022-07661-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/16/2022] [Indexed: 12/26/2022] Open
Abstract
We conducted an observational study to assess the prevalence and risk factors of vitamin D deficiency in 12–24 months old children living in urban and rural Bangladesh. Serum 25-hydroxyvitamin D (free 25(OH)D) level, socio-demographic status, anthropometric status, dietary intake, exposure to sunlight and single nucleotide polymorphisms in vitamin-D pathway genes were measured in 208 children. Vitamin D deficiency (free 25(OH)D < 50 nmol/l) was reported in 47% of the children. Multivariable logistic regression model identified duration to sunlight exposure (regression coefficient, β = − 0.01; 95% CI 0.00, − 0.02; p-value < 0.05), UV index (β = − 0.36; 95% CI 0.00, − 0.02; p-value < 0.05) and breast-feeding (β = − 1.15; 95% CI − 0.43, − 1.86; p-value < 0.05) to be negatively associated with vitamin D deficiency. We measured the role of single nucleotide polymorphisms in pathway genes (GC-rs7041 T > G, rs4588 C > A, CYP2R1-rs206793 A > G, CYP27B1-rs10877012 A > C and DHCR7-rs12785878 G > T) and found statistically significant differences in serum vitamin D levels between various genotypes. SNPs for CYP27B1 (CA & CC genotype) had statistically significant positive association (β = 1.61; 95% CI 2.79, 0.42; p-value < 0.05) and TT genotype of GC-rs7041 had negative association (β = − 1.33; 95% CI − 0.02, − 2.64; p-value < 0.05) with vitamin-D deficiency in the surveyed children.
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Singh P, Rawat A, Saadaoui M, Elhag D, Tomei S, Elanbari M, Akobeng AK, Mustafa A, Abdelgadir I, Udassi S, Hendaus MA, Al Khodor S. Tipping the Balance: Vitamin D Inadequacy in Children Impacts the Major Gut Bacterial Phyla. Biomedicines 2022; 10:biomedicines10020278. [PMID: 35203487 PMCID: PMC8869474 DOI: 10.3390/biomedicines10020278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/12/2022] Open
Abstract
Vitamin D inadequacy appears to be on the rise globally, and it has been linked to an increased risk of osteoporosis, as well as metabolic, cardiovascular, and autoimmune diseases. Vitamin D concentrations are partially determined by genetic factors. Specific single nucleotide polymorphisms (SNPs) in genes involved in vitamin D transport, metabolism, or binding have been found to be associated with its serum concentration, and these SNPs differ among ethnicities. Vitamin D has also been suggested to be a regulator of the gut microbiota and vitamin D deficiency as the possible cause of gut microbial dysbiosis and inflammation. This pilot study aims to fill the gap in our understanding of the prevalence, cause, and implications of vitamin D inadequacy in a pediatric population residing in Qatar. Blood and fecal samples were collected from healthy subjects aged 4–14 years. Blood was used to measure serum metabolite of vitamin D, 25-hydroxycholecalciferol 25(OH)D. To evaluate the composition of the gut microbiota, fecal samples were subjected to 16S rRNA gene sequencing. High levels of vitamin D deficiency/insufficiency were observed in our cohort with 97% of the subjects falling into the inadequate category (with serum 25(OH)D < 75 nmol/L). The CT genotype in rs12512631, an SNP in the GC gene, was associated with low serum levels of vitamin D (ANOVA, p = 0.0356) and was abundant in deficient compared to non-deficient subjects. Overall gut microbial community structure was significantly different between the deficient (D) and non-deficient (ND) groups (Bray Curtis dissimilarity p = 0.049), with deficient subjects also displaying reduced gut microbial diversity. Significant differences were observed among the two major gut phyla, Firmicutes (F) and Bacteroidetes (B), where deficient subjects displayed a higher B/F ratio (p = 0.0097) compared to ND. Vitamin D deficient children also demonstrated gut enterotypes dominated by the genus Prevotella as opposed to Bacteroides. Our findings suggest that pediatric vitamin D inadequacy significantly impacts the gut microbiota. We also highlight the importance of considering host genetics and baseline gut microbiome composition in interpreting the clinical outcomes related to vitamin D deficiency as well as designing better personalized strategies for therapeutic interventions.
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Affiliation(s)
- Parul Singh
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha P.O. Box 5825, Qatar
| | - Arun Rawat
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
| | - Marwa Saadaoui
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
| | - Duaa Elhag
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
| | - Sara Tomei
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
| | - Mohammed Elanbari
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
| | - Anthony K. Akobeng
- Division of Gastroenterology, Hepatology, and Nutrition, Sidra Medicine, Doha P.O. Box 26999, Qatar;
| | - Amira Mustafa
- Pediatric Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (A.M.); (S.U.); (M.A.H.)
| | | | - Sharda Udassi
- Pediatric Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (A.M.); (S.U.); (M.A.H.)
| | - Mohammed A. Hendaus
- Pediatric Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (A.M.); (S.U.); (M.A.H.)
| | - Souhaila Al Khodor
- Research Department, Sidra Medicine, Doha P.O. Box 26999, Qatar; (P.S.); (A.R.); (M.S.); (D.E.); (S.T.); (M.E.)
- Correspondence: ; Tel.: +974-4003-7397
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Lemke D, Klement RJ, Schweiger F, Schweiger B, Spitz J. Vitamin D Resistance as a Possible Cause of Autoimmune Diseases: A Hypothesis Confirmed by a Therapeutic High-Dose Vitamin D Protocol. Front Immunol 2021; 12:655739. [PMID: 33897704 PMCID: PMC8058406 DOI: 10.3389/fimmu.2021.655739] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/19/2021] [Indexed: 01/02/2023] Open
Abstract
Vitamin D3 (cholecalciferol) is a secosteroid and prohormone which is metabolized in various tissues to the biologically most active vitamin D hormone 1,25(OH)2D3 (calcitriol). 1,25(OH)2D3 has multiple pleiotropic effects, particularly within the immune system, and is increasingly utilized not only within prophylaxis, but also within therapy of various diseases. In this context, the latest research has revealed clinical benefits of high dose vitamin D3 therapy in autoimmune diseases. The necessity of high doses of vitamin D3 for treatment success can be explained by the concept of an acquired form of vitamin D resistance. Its etiology is based on the one hand on polymorphisms within genes affecting the vitamin D system, causing susceptibility towards developing low vitamin D responsiveness and autoimmune diseases; on the other hand it is based on a blockade of vitamin D receptor signaling, e.g. through pathogen infections. In this paper, we review observational and mechanistic evidence for the acquired vitamin D resistance hypothesis. We particularly focus on its clinical confirmation from our experience of treating multiple sclerosis patients with the so-called Coimbra protocol, in which daily doses up to 1000 I.U. vitamin D3 per kg body weight can be administered safely. Parathyroid hormone levels in serum thereby provide the key information for finding the right dose. We argue that acquired vitamin D resistance provides a plausible pathomechanism for the development of autoimmune diseases, which could be treated using high-dose vitamin D3 therapy.
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Affiliation(s)
- Dirk Lemke
- Praxis Dr. Beatrix Schweiger, Bensheim, Germany
| | - Rainer Johannes Klement
- Department of Radiotherapy and Radiation Oncology, Leopoldina Hospital Schweinfurt, Schweinfurt, Germany
| | | | | | - Jörg Spitz
- Akademie für menschliche Medizin und evolutionäre Gesundheit, Schlangenbad, Germany
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CYP7A1, NPC1L1, ABCB1, and CD36 Polymorphisms Are Associated with Increased Serum Coenzyme Q 10 after Long-Term Supplementation in Women. Antioxidants (Basel) 2021; 10:antiox10030431. [PMID: 33799730 PMCID: PMC7998724 DOI: 10.3390/antiox10030431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 02/03/2023] Open
Abstract
Coenzyme Q10 (CoQ10), an essential component for energy production that exhibits antioxidant activity, is considered a health-supporting and antiaging supplement. However, intervention-controlled studies have provided variable results on CoQ10 supplementation benefits, which may be attributed to individual CoQ10 bioavailability differences. This study aimed to investigate the relationship between genetic polymorphisms and CoQ10 serum levels after long-term supplementation. CoQ10 levels at baseline and after one year of supplementation (150 mg) were determined, and eight single nucleotide polymorphisms (SNPs) in cholesterol metabolism and CoQ10 absorption, efflux, and cellular uptake related genes were assessed. Rs2032582 (ABCB1) and rs1761667 (CD36) were significantly associated with a higher increase in CoQ10 levels in women. In addition, in women, rs3808607 (CYP7A1) and rs2072183 (NPC1L1) were significantly associated with a higher increase in CoQ10 per total cholesterol levels. Subgroup analyses showed that these four SNPs were useful for classifying high- or low-responder to CoQ10 bioavailability after long-term supplementation among women, but not in men. On the other hand, in men, no SNP was found to be significantly associated with increased serum CoQ10. These results collectively provide novel evidence on the relationship between genetics and CoQ10 bioavailability after long-term supplementation, which may help understand and assess CoQ10 supplementation effects, at least in women.
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Marozik P, Rudenka A, Kobets K, Rudenka E. Vitamin D Status, Bone Mineral Density, and VDR Gene Polymorphism in a Cohort of Belarusian Postmenopausal Women. Nutrients 2021; 13:nu13030837. [PMID: 33806559 PMCID: PMC7999336 DOI: 10.3390/nu13030837] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/16/2021] [Accepted: 02/17/2021] [Indexed: 01/18/2023] Open
Abstract
Vitamin D plays an important role in bone metabolism and is important for the prevention of multifactorial pathologies, including osteoporosis (OP). The biological action of vitamin is realized through its receptor, which is coded by the VDR gene. VDR gene polymorphism can influence individual predisposition to OP and response to vitamin D supplementation. The aim of this work was to reveal the effects of VDR gene ApaI rs7975232, BsmI rs1544410, TaqI rs731236, FokI rs2228570, and Cdx2 rs11568820 variants on bone mineral density (BMD), 25-hydroxyvitamin D level, and OP risk in Belarusian women. Methods. The case group included 355 women with postmenopausal OP, and the control group comprised 247 women who met the inclusion criteria. TaqMan genotyping assay was used to determine VDR gene variants. Results. Rs7975232 A/A, rs1544410 T/T, and rs731236 G/G single variants and their A-T-G haplotype showed a significant association with increased OP risk (for A-T-G, OR = 1.8, p = 0.0001) and decreased BMD (A-T-G, −0.09 g/cm2, p = 0.0001). The rs11568820 A-allele showed a protective effect on BMD (+0.22 g/cm2, p = 0.027). A significant dose effect with 25(OH)D was found for rs1544410, rs731236, and rs11568820 genotypes. Rs731236 A/A was associated with the 25(OH)D deficiency state. Conclusion. Our novel data on the relationship between VDR gene variants and BMD, 25(OH)D level, and OP risk highlights the importance of genetic markers for personalized medicine strategy.
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Affiliation(s)
- Pavel Marozik
- Laboratory of Human Genetics, Institute of Genetics and Cytology of the National Academy of Sciences of Belarus, 220072 Minsk, Belarus;
- Department of General Biology and Genetics, International Sakharov Environmental Institute of the Belarusian State University, 220070 Minsk, Belarus
- Correspondence: ; Tel.: +375-17-364-1614
| | - Alena Rudenka
- Department of Cardiology and Rheumatology, Belarusian Medical Academy of Post-Graduate Education, 220013 Minsk, Belarus;
| | - Katsiaryna Kobets
- Laboratory of Human Genetics, Institute of Genetics and Cytology of the National Academy of Sciences of Belarus, 220072 Minsk, Belarus;
| | - Ema Rudenka
- Department of Cardiology and Internal Diseases, Belarusian State Medical University, 220116 Minsk, Belarus;
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Fakhfakh R, Feki S, Elleuch A, Neifar M, Marzouk S, Elloumi N, Hachicha H, Abida O, Bahloul Z, Ayadi F, Masmoudi H. Vitamin D status and CYP27B1-1260 promoter polymorphism in Tunisian patients with systemic lupus erythematosus. Mol Genet Genomic Med 2021; 9:e1618. [PMID: 33594806 PMCID: PMC8104169 DOI: 10.1002/mgg3.1618] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 01/09/2021] [Accepted: 01/18/2021] [Indexed: 12/15/2022] Open
Abstract
Aim An association between serum vitamin D (Vit D) levels and systemic lupus erythematosus (SLE) has been reported by several studies that suggested the involvement of genetically determined characteristics of enzymes of vitamin D metabolism. Our study aimed to evaluate the relationship between 25 hydroxyvitamin D (25[OH]D) level, the most representative metabolite of VitD status, and polymorphism of the cytochrome P450, CYP27B1 gene, which influence vitamin D metabolism, and serum levels, in SLE Tunisian patients. Material and Methods A cross‐sectional study has been conducted in SLE patients (supplemented and not supplemented patients), matched to healthy controls by age and gender. The 25[OH]D serum level was measured by chemiluminescence assay and CYP27B1‐1260 genetic polymorphism was carried out using PCR‐RFLP methods. Statistical analysis was made using Shesis and SPSS.20 Software. Results Controls and Vit D not supplemented patients’ groups presented the highest percentage of hypovitaminosis D. A significant difference in the mean level of circulating 25[OH]D between Vit D supplemented SLE patients and controls was observed (23.91 ng/ml and 7.18 ng/ml, respectively p = 3.4 105). Our results showed a correlation of high 25[OH]D level with complement component 3 levels and prednisolone drug. Moreover, the analysis of CYP27B1‐1260 polymorphism in SLE patients and controls revealed a nonsignificant allelic or genotypic association. Conclusion Despite the sunny climate, the high prevalence of Vit D deficiency is common in Tunisia. This hypovitaminosis D feature may affect the Vit D levels in our SLE patients but a direct association with the disease or with the genetically determined features remains unclear. More studies are needed to establish thresholds and susceptibility genes according to the characteristics of each population.
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Affiliation(s)
- Raouia Fakhfakh
- Autoimmunity, Cancer and immunogenetics research laboratory, University hospital Habib Bourguiba of Sfax, Sfax, Tunisia
| | - Sawsan Feki
- Autoimmunity, Cancer and immunogenetics research laboratory, University hospital Habib Bourguiba of Sfax, Sfax, Tunisia
| | - Aida Elleuch
- Biochemistry Department, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Manel Neifar
- Biochemistry Department, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Sameh Marzouk
- Internal Medicine Department, HediChaker University Hospital, Sfax, Tunisia
| | - Nesrine Elloumi
- Autoimmunity, Cancer and immunogenetics research laboratory, University hospital Habib Bourguiba of Sfax, Sfax, Tunisia
| | - Hend Hachicha
- Autoimmunity, Cancer and immunogenetics research laboratory, University hospital Habib Bourguiba of Sfax, Sfax, Tunisia
| | - Olfa Abida
- Autoimmunity, Cancer and immunogenetics research laboratory, University hospital Habib Bourguiba of Sfax, Sfax, Tunisia
| | - Zouhir Bahloul
- Internal Medicine Department, HediChaker University Hospital, Sfax, Tunisia
| | - Fatma Ayadi
- Biochemistry Department, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Hatem Masmoudi
- Autoimmunity, Cancer and immunogenetics research laboratory, University hospital Habib Bourguiba of Sfax, Sfax, Tunisia
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