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Jamoussi M, Alaya F, Jamoussi H, Baraket G, Achouri A, Mahmoud MB, Fray S, Ben Ali N, Messaoud T, Hannachi Salhi A, Fredj M. Vitamin D receptor gene BsmI (rs1544410) polymorphism: role in multiple sclerosis and genotype-phenotype correlations. Mol Biol Rep 2024; 51:478. [PMID: 38578462 DOI: 10.1007/s11033-024-09369-w] [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: 11/27/2023] [Accepted: 02/20/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Multiple sclerosis (MS) has a complex pathophysiology which depends on many endogenous and exogenous factors. Vitamin D involvement has been largely studied in MS. The large distribution of the vitamin D receptor (VDR) in different immune cells is suggestive of an immunomodulatory role. The VDR gene polymorphisms have been proposed as potential risk factors for MS development or evolution with non-conclusive results. METHODS AND RESULTS We conducted a cross-sectional study including patients ≥ 18 years, with a diagnosis of relapsing remitting MS according to the McDonald Criteria and having a minimum follow-up period of one year after starting a disease modifying therapy. Two study groups were compared based on the Multiple Sclerosis Severity Scale or MSSS: "a slow progressor" group for an MSSS ≤ 5, and a "fast progressor" group for an MSSS > 5. The rs1544410 VDR gene polymorphism was studied for all patients. Eighty patients were included. The fast progressor groups had a higher EDSS at onset, a higher total number of relapses, more frequent and shorter time to secondary progression. The progression profile was not statistically different between genotypes and alleles of the VDR gene polymorphism rs1544410. The CC genotype and wild-type allele exhibited a more aggressive disease phenotype with a higher number of relapses the first year, shorter time to secondary progression and cerebral atrophy on assessment. CONCLUSIONS Our results suggest potential genotype-phenotype correlations for the rs1544410 VDR gene polymorphism in the disease course of MS. Future research on a larger scale is needed to confirm these findings.
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Affiliation(s)
- Maha Jamoussi
- Neurology Department, Charles Nicolle Hospital, Tunis, Tunisia.
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia.
- Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia.
| | - Faten Alaya
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
- Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Hela Jamoussi
- Neurology Department, Charles Nicolle Hospital, Tunis, Tunisia
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
- Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Ghada Baraket
- Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Afef Achouri
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
| | - Mariem Ben Mahmoud
- Neurology Department, Charles Nicolle Hospital, Tunis, Tunisia
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
- Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Saloua Fray
- Neurology Department, Charles Nicolle Hospital, Tunis, Tunisia
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
- Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Nadia Ben Ali
- Neurology Department, Charles Nicolle Hospital, Tunis, Tunisia
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
- Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Taieb Messaoud
- Children's Hospital of Tunis Bechir Hamza, Tunis, Tunisia
| | - Amel Hannachi Salhi
- Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Mohamed Fredj
- Neurology Department, Charles Nicolle Hospital, Tunis, Tunisia
- Charles Nicolle Hospital Research Laboratory LR12SP01, Tunis, Tunisia
- Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia
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Anwar MJ, Alenezi SK, Alhowail AH. Molecular insights into the pathogenic impact of vitamin D deficiency in neurological disorders. Biomed Pharmacother 2023; 162:114718. [PMID: 37084561 DOI: 10.1016/j.biopha.2023.114718] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 04/23/2023] Open
Abstract
Neurological disorders are the major cause of disability, leading to a decrease in quality of life by impairing cognitive, sensorimotor, and motor functioning. Several factors have been proposed in the pathogenesis of neurobehavioral changes, including nutritional, environmental, and genetic predisposition. Vitamin D (VD) is an environmental and nutritional factor that is widely distributed in the central nervous system's subcortical grey matter, neurons of the substantia nigra, hippocampus, thalamus, and hypothalamus. It is implicated in the regulation of several brain functions by preserving neuronal structures. It is a hormone rather than a nutritional vitamin that exerts a regulatory role in the pathophysiology of several neurological disorders, including Alzheimer's disease, Parkinson's disease, epilepsy, and multiple sclerosis. A growing body of epidemiological evidence suggests that VD is critical in neuronal development and shows neuroprotective effects by influencing the production and release of neurotrophins, antioxidants, immunomodulatory, regulation of intracellular calcium balance, and direct effect on the growth and differentiation of nerve cells. This review provides up-to-date and comprehensive information on vitamin D deficiency, risk factors, and clinical and preclinical evidence on its relationship with neurological disorders. Furthermore, this review provides mechanistic insight into the implications of vitamin D and its deficiency on the pathogenesis of neurological disorders. Thus, an understanding of the crucial role of vitamin D in the neurobiology of neurodegenerative disorders can assist in the better management of vitamin D-deficient individuals.
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Affiliation(s)
- Md Jamir Anwar
- Department of Pharmacology and Toxicology, Unaizah College of Pharmacy, Qassim University, Qassim, Unaizah 51911, Saudi Arabia
| | - Sattam Khulaif Alenezi
- Department of Pharmacology and Toxicology, Unaizah College of Pharmacy, Qassim University, Qassim, Unaizah 51911, Saudi Arabia.
| | - Ahmad Hamad Alhowail
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Qassim, Buraydah 51452, Saudi Arabia
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Elkama A, Orhan G, Karahalil B. Association of vitamin D receptor polymorphisms with vitamin D and calcium levels in Turkish multiple sclerosis patients. Neurodegener Dis Manag 2022; 12:323-331. [PMID: 35848285 DOI: 10.2217/nmt-2022-0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: The present study was conducted to assess the impact of gene (vitamin D receptor [VDR] polymorphisms) - environment (serum vitamin D and calcium levels) interaction on multiple sclerosis (MS) risk. Materials & methods: FokI, BsmI, TaqI and ApaI genotyping were performed in 149 MS patients and 127 controls. We measured serum vitamin D and calcium levels. Results: No significant difference between VDR polymorphisms and MS risk was detected. In patients with FokI ff, BsmI Bb, TaqI Tt and ApaI AA genotypes, vitamin D levels were statistically higher. Serum calcium levels were significantly lower in patients with FokI FF, Ff, all BsmI and TaqI genotypes and ApaI AA and Aa genotypes. Conclusion: No significant association was found between VDR polymorphisms with MS risk.
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Affiliation(s)
- Aylin Elkama
- Department of Toxicology, Faculty of Pharmacy, Gazi University, Ankara, 06330, Turkey
| | - Gürdal Orhan
- Clinic of Neurology, Ankara Bilkent City Hospitals, Bilkent, Ankara, 06800, Turkey
| | - Bensu Karahalil
- Department of Toxicology, Faculty of Pharmacy, Gazi University, Ankara, 06330, Turkey
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Vitamin D Receptor Polymorphisms Among the Turkish Population are Associated with Multiple Sclerosis. Balkan J Med Genet 2022; 25:41-50. [PMID: 36880035 PMCID: PMC9985364 DOI: 10.2478/bjmg-2022-0003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
Multiple sclerosis (MS) is an inflammatory disease characterized by demyelination and axonal degeneration affecting the central nervous system. Among the genetic factors suggested to be associated with this disease are polymorphisms to the vitamin D receptor (VDR) gene. We tested the hypothesis that polymorphisms in the vitamin D receptor (VDR) gene are associated with MS. The aim of the study was to investigate the relationship of MS with the VDR gene Fok-I, Bsm-I and Taq-I polymorphisms among the Turkish population. This study contains 271 MS patients and 203 healthy controls. Genomic DNA was isolated from the samples and the VDR gene Fok-I, Bsm-I and Taq-I polymorphism regions were amplified by polymerase chain reaction (PCR). The PCR products were digested, and the genotypes were determined based on size of digested PCR products. Our results demonstrate associations between MS and the distribution of the VDR gene Fok-I T/T polymorphism genotype in a dominant model, VDR gene Fok-I T allele frequency, distribution of VDR gene Taq-I C/C polymorphism genotype in a dominant model and VDR gene Taq-I C allele frequency (Pearson test, p<0.05). However, there was no association between MS and the VDR gene Bsm-I polymorphisms for the genotype distribution (Pearson test, p>0.05) or allele frequency (Pearson test, p>0.05). Fok-I and Taq-I VDR gene polymorphisms are significantly associated with MS in dominant, homozygote and heterozygote inheritance models among the Turkish population.
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Abdelhamid L, Luo XM. Diet and Hygiene in Modulating Autoimmunity During the Pandemic Era. Front Immunol 2022; 12:749774. [PMID: 35069526 PMCID: PMC8766844 DOI: 10.3389/fimmu.2021.749774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 12/13/2021] [Indexed: 12/11/2022] Open
Abstract
The immune system is an efficiently toned machinery that discriminates between friends and foes for achieving both host defense and homeostasis. Deviation of immune recognition from foreign to self and/or long-lasting inflammatory responses results in the breakdown of tolerance. Meanwhile, educating the immune system and developing immunological memory are crucial for mounting defensive immune responses while protecting against autoimmunity. Still to elucidate is how diverse environmental factors could shape autoimmunity. The emergence of a world pandemic such as SARS-CoV-2 (COVID-19) not only threatens the more vulnerable individuals including those with autoimmune conditions but also promotes an unprecedented shift in people's dietary approaches while urging for extraordinary hygiene measures that likely contribute to the development or exacerbation of autoimmunity. Thus, there is an urgent need to understand how environmental factors modulate systemic autoimmunity to better mitigate the incidence and or severity of COVID-19 among the more vulnerable populations. Here, we discuss the effects of diet (macronutrients and micronutrients) and hygiene (the use of disinfectants) on autoimmunity with a focus on systemic lupus erythematosus.
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Affiliation(s)
- Leila Abdelhamid
- Department of Biomedical Sciences and Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
- Department of Microbiology, College of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Xin M. Luo
- Department of Biomedical Sciences and Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
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Tangjittipokin W, Umjai P, Khemaprasit K, Charoentawornpanich P, Chanprasert C, Teerawattanapong N, Narkdontri T, Santiprabhob J. Vitamin D pathway gene polymorphisms, vitamin D level, and cytokines in children with type 1 diabetes. Gene 2021; 791:145691. [PMID: 33961971 DOI: 10.1016/j.gene.2021.145691] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/05/2021] [Accepted: 04/30/2021] [Indexed: 02/06/2023]
Abstract
AIMS The study aimed to examine genetic polymorphism of vitamin D-related genes and association between those genes and vitamin D and cytokines levels in children with type 1 diabetes (T1D). MATERIALS AND METHODS This study was conducted among 100 T1D children and 100 controls at Division of Endocrinology and Metabolism, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand, during 2016 to 2018. Vitamin D metabolite levels were measured by liquid chromatography-tandem mass spectrometry method, serum cytokine levels of IFN- ɣ, IL-10, IL-13, IL-17α, IL-2, IL-4, IL-6, and TNF-α by immunoassay, and genetic variations at VDR, CYP2R1, CYP27B1, GC, DHCR7, and CYP24A1 by polymerase chain reaction-restriction fragment length polymorphism method. RESULTS A relationship between studied single nucleotide polymorphisms and T1D was found in CYP2R1 (rs10741657) (GA, OR: 1.83, 95% CI: 1.01-3.31; p = 0.04). VDR haplotypes were also remarkably different between T1D patients and controls. Controls had higher frequency of haplotype TACT than T1D patients (p = 0.02). Vitamin D and all cytokine levels, except for IL-17α, were significantly increased in T1D compared to controls. The polymorphism of DHCR7 (rs12785878) was positively associated with 25OHD3 and 3epi25OHD3 levels and was negatively associated with 25OHD2 level. On the other hand, polymorphism of CYP27B1 (rs4646536) was negatively associated with 3epi25OHD3 level. Polymorphisms of CYP27B1 (rs4646536) and GC (rs2282679) were positively associated with TNF-α levels. VDR variation of rs1544410, rs731236, and rs7975232 also showed negative association with IL-10 levels. In contrast, the level of IL-10 was positively associated with DHCR7 (rs12785878). CONCLUSION Relationships between T1D and CYP2R1 polymorphism and VDR haplotype were found. Vitamin D gene-related variations were associated with vitamin D and circulating cytokine levels in children with T1D.
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Affiliation(s)
- Watip Tangjittipokin
- Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Siriraj Center of Research Excellence for Diabetes and Obesity, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pichakorn Umjai
- Graduate Program in Immunology, Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Khwanhatai Khemaprasit
- Siriraj Diabetes Center of Excellence, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Parichat Charoentawornpanich
- Division of Endocrinology and Metabolism, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chutima Chanprasert
- Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nipaporn Teerawattanapong
- Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Siriraj Center of Research Excellence for Diabetes and Obesity, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Tassanee Narkdontri
- Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Siriraj Center of Research Excellence for Diabetes and Obesity, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jeerunda Santiprabhob
- Siriraj Diabetes Center of Excellence, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Division of Endocrinology and Metabolism, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Moosavi E, Rafiei A, Yazdani Y, Eslami M, Saeedi M. Association of serum levels and receptor genes BsmI, TaqI and FokI polymorphisms of vitamin D with the severity of multiple sclerosis. J Clin Neurosci 2021; 84:75-81. [PMID: 33485603 DOI: 10.1016/j.jocn.2020.12.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 11/12/2020] [Accepted: 12/06/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE Multiple sclerosis (MS) is a chronic inflammatory and neurodegenerative disease. Vitamin D has a major role in preventing inflammatory disorders. Therefore, any alteration in vitamin D receptor (VDR) might be a genetic risk factor for MS development. This study aimed to evaluate the effect of serum levels and VDR FokI, BsmI, and TaqI gene polymorphisms on the severity of MS. METHODS This case-control study recruited 160 MS patients (71.9% females, mean age of 34.3 ± 8.3 years) and 162 (66.7% females, mean age 35.4 ± 7.9 year) age, sex, and ethnicity matched healthy controls. FokI (rs2228570), BsmI (rs1544410), and TaqI (rs731236) polymorphisms were carried out using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Demographic, clinical parameters, and the levels of vitamin D were compared between groups. RESULTS We found that the frequency of FokI and TaqI polymorphisms significantly differed between the patients and the controls (p = 0.0127 and p = 0.0236, respectively). The MS patients had low levels of vitamin D compared to the controls (p = 0.011). In addition, TaqI T/C polymorphism significantly decreased the levels of vitamin D in the MS patients (p = 0.002). However, there was no significant association between FokI or BsmI SNPs and the levels of vitamin D in MS patients (p > 0.5). CONCLUSION Our results suggest that FokI and TaqI polymorphisms of VDR are associated with MS risk and TaqI polymorphism is associated with Vitamin D levels in MS patients. Meanwhile, no difference was observed between VDR gene polymorphisms and any types of MS.
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Affiliation(s)
- Ensieh Moosavi
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran; Department of Immunology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Alireza Rafiei
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
| | - Yaghoub Yazdani
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran; Department of Immunology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mina Eslami
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mohsen Saeedi
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran; Department of Immunology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran.
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Scazzone C, Agnello L, Bivona G, Lo Sasso B, Ciaccio M. Vitamin D and Genetic Susceptibility to Multiple Sclerosis. Biochem Genet 2020; 59:1-30. [PMID: 33159645 DOI: 10.1007/s10528-020-10010-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 10/22/2020] [Indexed: 12/28/2022]
Abstract
Multiple sclerosis (MS) is an autoimmune disease affecting the central nervous system (CNS), resulting from the interaction among genetic, epigenetic, and environmental factors. Vitamin D is a secosteroid, and its circulating levels are influenced by environment and genetics. In the last decades, research data on the association between MS and vitamin D status led to hypothesize a possible role for hypovitaminosis D as a risk factor for MS. Some gene variants encoding proteins involved in vitamin D metabolism, transport, and function, which are responsible for vitamin D status alterations, have been related to MS susceptibility. This review explores the current literature on the influence of vitamin D-related genes in MS susceptibility, reporting all single-nucleotide polymorphisms (SNPs) investigated to date in 12 vitamin D pathway genes. Among all, the gene codifying vitamin D receptor (VDR) is the most studied. The association between VDR SNPs and MS risk has been reported by many Authors, with a few studies producing opposite results. Other vitamin D-related genes (including DHCR7/NADSYN1, CYP2R1, CYP27A1, CYP3A4, CYP27B1, CYP24A1, Megalin-DAB2-Cubilin, FGF-23, and Klotho) have been less investigated and achieved more conflicting evidence. Taken together, findings from the studies reviewed cannot clarify whether and to what extent vitamin D-related gene variants can influence MS risk.
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Affiliation(s)
- Concetta Scazzone
- Department of Biomedicine, Neurosciences and Advanced Diagnostics, Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, University of Palermo, Via del Vespro, 129, CAP 90127, Palermo, Sicily, Italy
| | - Luisa Agnello
- Department of Biomedicine, Neurosciences and Advanced Diagnostics, Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, University of Palermo, Via del Vespro, 129, CAP 90127, Palermo, Sicily, Italy
| | - Giulia Bivona
- Department of Biomedicine, Neurosciences and Advanced Diagnostics, Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, University of Palermo, Via del Vespro, 129, CAP 90127, Palermo, Sicily, Italy
| | - Bruna Lo Sasso
- Department of Biomedicine, Neurosciences and Advanced Diagnostics, Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, University of Palermo, Via del Vespro, 129, CAP 90127, Palermo, Sicily, Italy
- Department of Laboratory Medicine, University-Hospital, Palermo, Italy
| | - Marcello Ciaccio
- Department of Biomedicine, Neurosciences and Advanced Diagnostics, Institute of Clinical Biochemistry, Clinical Molecular Medicine and Laboratory Medicine, University of Palermo, Via del Vespro, 129, CAP 90127, Palermo, Sicily, Italy.
- Department of Laboratory Medicine, University-Hospital, Palermo, Italy.
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Serum 25-hydroxyvitamin D level and vitamin D receptor (VDR) polymorphisms in patients infected with Leishmania tropica: a case control study. J Parasit Dis 2020; 44:40-48. [PMID: 32174704 DOI: 10.1007/s12639-019-01159-7] [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] [Received: 04/09/2019] [Accepted: 09/03/2019] [Indexed: 10/25/2022] Open
Abstract
Leishmania, an obligate intracellular parasite is eliminated by a strong Th-1 host response. As Vitamin D metabolism and its receptor activity are important factors in human native immune system against some microorganisms, we hypothesized that VDR gene polymorphisms and concentration of Vitamin D might have effect on incidence of cutaneous leishmaniasis. The aim of this study was to investigate the association between VDR gene polymorphism and/or the serum vitamin D level and leishmaniasis in the infected patients in comparison to the healthy individuals. In this case-control study, the BsmI, FokI and Taq1 polymorphisms in the VDR gene and serum levels of vitamin D were studied in Iranian infected with Leishmania tropica (n = 50) and healthy controls using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and Electrochemiluminescence methods respectively. Data were statistically analyzed using SPSS software, Chi square and ANOVA tests. The results of this study showed that despite the relatively higher frequency of BsmI-BB, FokI-FF and TaqI-Tt than Non BsmI-BB, Non FokI-FF and Non TaqI-Tt in the patients compared with the healthy individuals, the differences were not statistically significant (P > 0.05). Based on our findings, the relationship between the VDR polymorphism, the serum concentration of 25-hydroxyvitamin D and the susceptibility to Leishmania tropica infection, remains unclear requiring further in-depth studies. However, for better interpretation, it is necessary to consider factors such as the size of the sample examined and the other alleles of VDR, including ApaI.
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Scazzone C, Agnello L, Lo Sasso B, Ciaccio AM, Giglio RV, Bivona G, Ciaccio M. Vitamin D and Multiple Sclerosis: An Open-Ended Story. Open Biochem J 2019. [DOI: 10.2174/1874091x01913010088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Multiple Sclerosis (MS) is a chronic inflammatory autoimmune disease of the Central Nervous System (CNS). Genetic, epigenetic and environmental factors interact together, contributing to the complex pathogenesis of the disease. In the last decades, the role of hypovitaminosis D on MS risk was hypothesised. Several factors drive the regulation of vitamin D status, including genetics. The current review summarises the literature evidence on the association between vitamin D and MS, with a focus on the genetic polymorphisms in vitamin D-related genes. The variants of the genes codifying Vitamin D Receptor (VDR), Vitamin D Binding Protein (VDBP) and CYP enzymes have been investigated, but the findings are controversial. Only a few studies have addressed the role of DHCR7 polymorphisms in MS risk.
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Imani D, Razi B, Motallebnezhad M, Rezaei R. Association between vitamin D receptor (VDR) polymorphisms and the risk of multiple sclerosis (MS): an updated meta-analysis. BMC Neurol 2019; 19:339. [PMID: 31878897 PMCID: PMC6933912 DOI: 10.1186/s12883-019-1577-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 12/16/2019] [Indexed: 01/01/2023] Open
Abstract
Background The association between the Vitamin D Receptor (VDR) gene polymorphism and the risk of Multiple sclerosis (MS) has been evaluated in several researches. However, the findings were inconsistent and inconclusive. Therefore, we set out a meta-analysis of all eligible published case-control studies to obtain an exact evaluation of the association between VDR gene polymorphisms and MS. Method All relevant studies reporting the association between the VDR gene FokI (rs2228570), or/and TaqI (rs731236) or/and BsmI (rs1544410) or/and ApaI (rs7975232) polymorphisms and susceptibility to MS published up to May, 2019 were identified by comprehensive systematic search in the electronic database of web of science, Scopus, and PubMed. After that, the strength of association between VDR gene polymorphisms and susceptibility to MS was evaluated by odds ratio (OR) and 95% confidence interval (CI). Results A total of 30 case–control studies were included in the meta-analysis. The overall results suggested a significant association between TaqI polymorphism and MS risk under heterozygote genetic model (OR = 1.27, 95%CI = 1.01–1.59, random effect). Moreover, the pooled results of subgroup analysis declined presence of significant association under all defined genetic model. In subgroup analysis, BsmI polymorphisms was associated with increased risk of MS under recessive model in Asian populations. On the other hand, ApaI polymorphism was associated with decreased risk of MS under recessive and aa vs. AA model in Asian populations. Conclusion This meta-analysis suggested a significant association between TaqI polymorphism and MS susceptibility. Furthermore, BsmI polymorphism was associated with increased risk of MS in Asian populations. In contrast, ApaI polymorphism was associated with decreased risk of MS in Asian populations. Future large-scale studies on gene–environment and gene–gene interactions are required to estimate risk factors and assist early diagnosis of patients at high risk for MS.
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Affiliation(s)
- Danyal Imani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences(TUMS), Tehran, Iran
| | - Bahman Razi
- Department of Hematology and Blood Banking, School of Medicine, Tarbiat modares university (TMU), Tehran, Iran
| | - Morteza Motallebnezhad
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ramazan Rezaei
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 14194, Iran.
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Mostafaee A, Rafiei S, Fazeli Z, Sayad A, Rahimi M, Rajabi S, Khamseh F, Shamshirgaran F, Rajabibazl M. The association analysis between rs1544410 and rs10735810 polymorphisms located at VDR gene and susceptibility to Multiple Sclerosis in Iranian population. GENE REPORTS 2019. [DOI: 10.1016/j.genrep.2019.100538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hassab AH, Deif AH, Elneely DA, Tawadros IM, Fayad AI. Protective association of VDR gene polymorphisms and haplotypes with multiple sclerosis patients in Egyptian population. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2019. [DOI: 10.1186/s43042-019-0009-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Zhang D, Wang L, Zhang R, Li S. Association of Vitamin D Receptor Gene Polymorphisms and the Risk of Multiple Sclerosis: A Meta Analysis. Arch Med Res 2019; 50:350-361. [PMID: 31677540 DOI: 10.1016/j.arcmed.2019.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 09/25/2019] [Accepted: 10/18/2019] [Indexed: 01/03/2023]
Abstract
BACKGROUND Previous studies have reported vitamin D receptor (VDR) polymorphisms in multiple sclerosis (MS); however, the results remain contradictory. This study aimed to investigate the association between VDR polymorphisms and the risk of MS. METHODS PubMed and Embase databases were searched to obtain eligible studies. Data were calculated by odds ratios (OR) with 95% confidence intervals (CI). RESULTS Twenty seven case-control studies with 4879 MS patients and 5402 controls were included. There was no significant association between ApaI polymorphisms and MS in the overall population. In Asians, no association was found between ApaI polymorphism and MS in the recessive, dominant, Codominant (OR1), Codominant (OR2), Codominant (OR3) models and allele contrast. Similar results were obtained between BsmI polymorphisms and MS. The association between TaqI polymorphism and MS showed significance in the recessive, homozygous, codominant (OR3) models in the overall population and Caucasians. The dominant model showed no association of Taq I polymorphism with MS risk in HLA-DRB1*15-positive and HLA-DRB1*15-negative groups. FokI polymorphism with MS was found in Codominant (OR3) model in the overall population. In Asians, FokI polymorphism showed association with MS in recessive, dominant, Codominant (OR1), Codominant (OR3) models and allele contrast. Subgroup analysis of sex showed no associations between TaqI or FokI polymorphism and MS risk in males or females in all models or allele contrast. CONCLUSIONS The VDR TaqI polymorphisms showed association with MS risk, especially in Caucasians. In Asians, ApaI and FokI polymorphisms correlated with MS risk, while BsmI polymorphisms showed no association with MS.
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Affiliation(s)
- Dongming Zhang
- Department of Endocrinology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Limei Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
| | - Rui Zhang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Shuo Li
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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Pytel V, Matías-Guiu JA, Torre-Fuentes L, Montero-Escribano P, Maietta P, Botet J, Álvarez S, Gómez-Pinedo U, Matías-Guiu J. Exonic variants of genes related to the vitamin D signaling pathway in the families of familial multiple sclerosis using whole-exome next generation sequencing. Brain Behav 2019; 9:e01272. [PMID: 30900415 PMCID: PMC6456803 DOI: 10.1002/brb3.1272] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/27/2019] [Accepted: 03/06/2019] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION Vitamin D (VD) deficiency has been associated with multiple sclerosis (MS) and other autoimmune diseases (AIDs). However, the effect of the genetics of VD on the risk of MS is subject to debate. This study focuses on genes linked to the VD signaling pathway in families with MS. The evaluation of gene variants in all the members of families could contribute to an additional knowledge on the information obtained from case-control studies that use nonrelated healthy people. MATERIAL AND METHODS We studied 94 individuals from 15 families including at least two patients with MS. We performed whole-exome next generation sequencing on all individuals and analyzed variants of the DHCR7, CYP2R1, CYP3A4, CYP27A1, GC, CYP27B1, LRP2, CUBN, DAB2, FCGR, RXR, VDR, CYP24A1, and PDIA3 genes. We also studied PTH, FGF23, METTL1, METTL21B, and the role of the linkage disequilibrium block on the long arm of chromosome 12, through analysis of the CDK4, TSFM, AGAP2, and AVIL genes. We compared patients with MS, other AIDs and unaffected members from different family types. RESULTS The study described the variants in the VD signaling pathway that appear in families with at least two patients with MS. Some infrequent variants were detected in these families, but no significant difference was observed between patients with MS and/or other AIDs and unaffected family members in the frequency of these variants. Variants previously associated with MS in the literature were not observed in these families or were distributed similarly in patients and unaffected family members. CONCLUSION The study of genes involved in the VD signaling pathway in families that include more than one patient with MS did not identify any variants that could explain the presence of the disease, suggesting that VD metabolism could probably play a role in MS more as an environmental factor rather than as a genetic factor. Our study also supports the analysis of cases and unaffected individuals within families in order to determine the influence of genetic factors.
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Affiliation(s)
- Vanesa Pytel
- Department of Neurology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain.,Laboratory of Neurobiology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | - Jordi A Matías-Guiu
- Department of Neurology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | - Laura Torre-Fuentes
- Laboratory of Neurobiology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | - Paloma Montero-Escribano
- Department of Neurology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | | | | | | | - Ulises Gómez-Pinedo
- Laboratory of Neurobiology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | - Jorge Matías-Guiu
- Department of Neurology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain.,Laboratory of Neurobiology, Institute of Neurosciences, IdISSC, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
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Vitamin D receptor gene polymorphisms in multiple sclerosis disease: A case-control study. REV ROMANA MED LAB 2018. [DOI: 10.2478/rrlm-2018-0028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Abstract
Multiple sclerosis (MS) is a common neurologic disorder that is a chronic inflammatory, demyelinating, and neurodegenerative disease of the central nervous system (CNS). Its etiology remains unknown. Several recent studies have found that decreased susceptibility to vitamin D deficiency is also associated with a decreased risk of MS. The role of vitamin D receptor (VDR) gene and its polymorphisms are highlighted as susceptible components. In this study, we aimed to identify the relationship between ApaI (rs7975232), BsmI (rs 1544410), and TaqI (rs731236) gene polymorphisms with MS. ApaI, BsmI, and TaqI genotypes were determined in 70 patients with MS and in 70 control subjects. DNA was isolated from blood samples, and then ApaI, BsmI and TaqI gene polymorphisms were identified using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay. The distribution of BsmI and TaqI polymorphisms did not show any significant differences in MS patients and controls; however, increased A allele of ApaI polymorphism was found in MS patients. Our findings suggest that the ApaI gene polymorphism might be associated with MS. Investigation of a larger population and functional work on these gene structures and function in MS patients are recommended.
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Yucel FE, Kamıslı O, Acar C, Sozen M, Tecellioğlu M, Ozcan C. Analysis of Vitamin D Receptor Polymorphisms in Patients with Familial Multiple Sclerosis. ACTA ACUST UNITED AC 2018; 72:58-61. [PMID: 29416220 PMCID: PMC5789553 DOI: 10.5455/medarh.2017.72.58-61] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objective Genetic and environmental factors are important in the development of the multiple sclerosis (MS). Vitamin D shows its effects on the immune system with the vitamin D receptor (VDR) in the nucleus. Single nucleotide polymorphisms (SNPs) in the VDR gene can lead to alterations in vitamin D functions and metabolism.Taq I, Apa I, Fok I and Bsm I polymorphisms and MS associations have been investigated in many studies. VDR gene polymorphism has not been previously studied in patients with familial MS. Aim We aimed to investigate the relationship between familial MS patients present in Turkish population and VDR genotypes Taq I, Apa I and Fok I polymorphisms. Methods 29 patients with a family history of MS and 120 healthy control subjects were included in the present study. We studied present VDR genotypes Taq I, Apa I and Fok I polymorphisms. Results We observed a significant difference between controls and patient group only in Taq I polymorphism (p: 0.025). Homozygousity of G allele was not seen in the patients whereas in controls frequency of that genotype was p:0.208. When gender was considered males show significant difference for GG genotype. There were no significant association for the Apa I and Fok I polymorphisms. Conclusion Although our findings suggest association between VDR Taq I polymorphism and the familial MS, additional studies are needed to establish detailed relationships.
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Affiliation(s)
- Fatma Ebru Yucel
- Inonu University, School of Medicine, Department of Neurology Malatya, Turkey
| | - Ozden Kamıslı
- Inonu University, School of Medicine, Department of Neurology Malatya, Turkey
| | - Ceren Acar
- Inonu University, Department of Molecular Biology and Genetics Malatya, Turkey
| | - Mert Sozen
- Inonu University, Department of Molecular Biology and Genetics Malatya, Turkey
| | - Mehmet Tecellioğlu
- Inonu University, School of Medicine, Department of Neurology Malatya, Turkey
| | - Cemal Ozcan
- Inonu University, School of Medicine, Department of Neurology Malatya, Turkey
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Matías-Guíu J, Oreja-Guevara C, Matias-Guiu J, Gomez-Pinedo U. Vitamin D and remyelination in multiple sclerosis. NEUROLOGÍA (ENGLISH EDITION) 2018. [DOI: 10.1016/j.nrleng.2016.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Role of gene polymorphisms in vitamin D metabolism and in multiple sclerosis. Arh Hig Rada Toksikol 2018; 69:25-31. [DOI: 10.2478/aiht-2018-69-3065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/01/2018] [Indexed: 01/25/2023] Open
Abstract
Abstract
Multiple sclerosis (MS) is a complex inflammatory disease of the central nervous system (CNS) resulting in neurological impairment and disability. There is evidence that adequate vitamin D levels may lower the risk of MS development. The aetiology of MS is complex and involves both genetic and environmental factors. In fact, not one but several genes are believed to lead to the disease. As for environmental factors, one of the most important risk factors is vitamin D deficiency, which, in turn, is closely related to gene polymorphisms that play a role in vitamin D metabolism and regulation. However, information about these gene polymorphisms is quite contradictory. The aim of this review is to discuss the association between some of the vitamin D-related gene variants and MS.
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Křenek P, Benešová Y, Bienertová-Vašků J, Vašků A. The Impact of Five VDR Polymorphisms on Multiple Sclerosis Risk and Progression: a Case-Control and Genotype-Phenotype Study. J Mol Neurosci 2018; 64:559-566. [PMID: 29589202 DOI: 10.1007/s12031-018-1034-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/30/2018] [Indexed: 12/26/2022]
Abstract
Vitamin D receptor polymorphisms have been the target of many studies focusing on multiple sclerosis. However, previously reported results have been inconclusive. The objective of this study was to investigate the association between five vitamin D receptor polymorphisms (EcoRV, FokI, ApaI, TaqI, and BsmI) and multiple sclerosis susceptibility and its course. The study was carried out as a case-control and genotype-phenotype study, consisted of 296 Czech multiple sclerosis patients and 135 healthy controls. Genotyping was carried out using polymerase chain reaction and restriction analysis. In multiple sclerosis men, allele and/or genotype distributions differed in EcoRV, TaqI, BsmI, and ApaI polymorphisms as compared to controls (EcoRV, pa = 0.02; Taq, pg = 0.02, pa = 0.02; BsmI, pg = 0.02, pa = 0.04; ApaI, pg = 0.008, pa = 0.005). In multiple sclerosis women, differences in the frequency of alleles and genotypes were found to be significant in ApaI (controls vs multiple sclerosis women: pg = 0.01, pa = 0.05). Conclusive results were observed between multiple sclerosis women in the case of EcoRV [differences in Expanded Disability Status Scale (p = 0.05); CT genotype was found to increase the risk of primary progressive multiple sclerosis 5.5 times (CT vs CC+TT pcorr = 0.01, sensitivity 0.833, specificity 0.525, power test 0.823)] and FokI [borderline difference in Multiple Sclerosis Severity Score (p = 0.05)]. Our results indicate that the distribution of investigated vitamin D receptor polymorphisms is a risk factor for multiple sclerosis susceptibility and progression in the Czech population. The association between disease risk and polymorphisms was found to be stronger in men. The association of disease progression with polymorphisms was observed only in women.
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Affiliation(s)
- Pavel Křenek
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Yvonne Benešová
- Department of Neurology, University Hospital Brno and Faculty of Medicine, Masaryk University, Jihlavská 20, 625 00, Brno, Czech Republic.
| | - Julie Bienertová-Vašků
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Anna Vašků
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
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Kamisli O, Acar C, Sozen M, Tecellioglu M, Yücel FE, Vaizoglu D, Özcan C. The association between vitamin D receptor polymorphisms and multiple sclerosis in a Turkish population. Mult Scler Relat Disord 2018; 20:78-81. [PMID: 29331875 DOI: 10.1016/j.msard.2018.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 12/29/2017] [Accepted: 01/04/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Multiple sclerosis (MS) is a chronic, demyelinating disease of the central nervous system (CNS). Genetic and environmental factors are important in disease development. Many studies have investigated the relationship between MS and VDR polymorphisms. VDR gene polymorphism has not been previously studied in Turkish MS patients. We aimed to investigate the relationship between MS and VDR genotypes Taq I, Apa I and Fok I polymorphisms in a Turkish population. METHODS 167 MS patients and 146 healthy control subjects were included in the present study. MS and the VDR TaqI (rs731236), ApaI (rs7975232), and FokI (rs2228570) polymorphisms were investigated. RESULTS The study enrolled 167 patients (121 females, 46 males) with MS and 146 healthy individuals (88 females, 58 males). The frequency of only the Fok I polymorphism differed significantly between the two groups (p = 0.002). The TaqI (rs731236) and ApaI (rs7975232) genotype distributions were not significantly different between MS patients and healthy controls (p = 0.626 and p = 0.990, respectively). Also there were no significant gender difference between patients and controls for Taq I and Apa I. CONCLUSION In conclusion, we found a significant association between MS and the FokI polymorphism in our region of Turkey. However, the results may be different in other populations. More epidemiological and genetic studies are needed to explain the association between genetic factors and MS.
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Affiliation(s)
- Ozden Kamisli
- Inonu University, School of Medicine, Department of Neurology, Malatya, Turkey.
| | - Ceren Acar
- Inonu University, Department of Molecular Biology and Genetics, Malatya, Turkey.
| | - Mert Sozen
- Inonu University, Department of Molecular Biology and Genetics, Malatya, Turkey.
| | - Mehmet Tecellioglu
- Inonu University, School of Medicine, Department of Neurology, Malatya, Turkey.
| | - Fatma Ebru Yücel
- Inonu University, School of Medicine, Department of Neurology, Malatya, Turkey.
| | - Dilara Vaizoglu
- Inonu University, Department of Molecular Biology and Genetics, Malatya, Turkey.
| | - Cemal Özcan
- Inonu University, School of Medicine, Department of Neurology, Malatya, Turkey.
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Vitamin D and Neurological Diseases: An Endocrine View. Int J Mol Sci 2017; 18:ijms18112482. [PMID: 29160835 PMCID: PMC5713448 DOI: 10.3390/ijms18112482] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 11/18/2017] [Accepted: 11/20/2017] [Indexed: 02/07/2023] Open
Abstract
Vitamin D system comprises hormone precursors, active metabolites, carriers, enzymes, and receptors involved in genomic and non-genomic effects. In addition to classical bone-related effects, this system has also been shown to activate multiple molecular mediators and elicit many physiological functions. In vitro and in vivo studies have, in fact, increasingly focused on the "non-calcemic" actions of vitamin D, which are associated with the maintenance of glucose homeostasis, cardiovascular morbidity, autoimmunity, inflammation, and cancer. In parallel, growing evidence has recognized that a multimodal association links vitamin D system to brain development, functions and diseases. With vitamin D deficiency reaching epidemic proportions worldwide, there is now concern that optimal levels of vitamin D in the bloodstream are also necessary to preserve the neurological development and protect the adult brain. The aim of this review is to highlight the relationship between vitamin D and neurological diseases.
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Association between VDR polymorphisms and multiple sclerosis: systematic review and updated meta-analysis of case-control studies. Neurol Sci 2017; 39:225-234. [DOI: 10.1007/s10072-017-3175-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 10/27/2017] [Indexed: 12/31/2022]
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Chen XL, Zhang ML, Zhu L, Peng ML, Liu FZ, Zhang GX, Wang LM, Zhao J. Vitamin D receptor gene polymorphisms and the risk of multiple sclerosis: An updated meta-analysis. Microb Pathog 2017; 110:594-602. [DOI: 10.1016/j.micpath.2017.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 06/22/2017] [Accepted: 08/01/2017] [Indexed: 10/19/2022]
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Sadeghi H, Taheri M, Sajadi E, Movafagh A, Arsang Jang S, Sayad A. VDR and CYP24A1 Expression Analysis in Iranian Relapsing-Remitting Multiple Sclerosis Patients. CELL JOURNAL 2017; 19:352-360. [PMID: 28836398 PMCID: PMC5570401 DOI: 10.22074/cellj.2017.4192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/27/2016] [Indexed: 02/01/2023]
Abstract
OBJECTIVES Multiple sclerosis (MS) is a common disease of the central nervous system.This disease may be initiated by either vitamin deficiency or triggered by abnormality in CYP24A1 and vitamin D receptor. MATERIALS AND METHODS In this case-control study, the expression of genes encoding vitamin D receptor (VDR) and CYP24A1 in relapsing-remitting MS (RR-MS) patients was compared with normal individuals in the Iranian population. RNA from whole blood of 50 RR-MS patients (HLA-DRB1*15-negative and responders to interferonbeta with a normal vitamin D level) and 50 normal controls was extracted. The levels of CYP24A1 and VDR expression were measured using real-time quantitative polymerase chain reaction. RESULTS The RR-MS group had a significantly more than 2 times higher expression level of VDR than the normal group (P=0.04). On the other hand, there was a 0.89 times decrease in the expression level of CYP24A1 in RR-MS patients which was not statistically significant. There was no linear correlation between the risk of expanded disability status scale of Kurtzke (EDSS) and the expression level of either CYP24A1 or VDR. In addition, the expression level of CYP24A1 or VDR was not correlated with the duration of the disease. CONCLUSIONS Up-regulation of VDR is likely to happen in RR-MS patients in the Iranian population. We did not observe a gene expression-phenotype correlation for CYP24A1 which may be due to limited statistical power as a result of the small sample size. Although the individuals taking part in this study had normal levels of vitamin D, the increase in VDR expression levels may perhaps be a response to a defect in vitamin D processing. Another possibility is that despite an increase in VDR expression level, factors such as micro-RNAs may result in their deactivation while an increase in VDR expression level can be seen as a compensatory response. Of course, further studies are required to identify the mechanism of action of vitamin D by analyzing genes involved in its signaling pathway, particularly VDR and CYP24A1.
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Affiliation(s)
- Hashem Sadeghi
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences,Tehran, Iran
| | - Mohammad Taheri
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences,Tehran, Iran
| | - Elham Sajadi
- Department of Hematology, School of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abolfazl Movafagh
- Department of Medical Genetics, School of Medicine, Cancer Research Centre, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shahram Arsang Jang
- Department of Epidemiology and Biostatistics, Faculty of Health, Qom University of Medical Sciences, Qom, Iran
| | - Arezou Sayad
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Bao L, Chen M, Lei Y, Zhou Z, Shen H, Le F. Association between vitamin D receptor BsmI polymorphism and bone mineral density in pediatric patients: A meta-analysis and systematic review of observational studies. Medicine (Baltimore) 2017; 96:e6718. [PMID: 28445285 PMCID: PMC5413250 DOI: 10.1097/md.0000000000006718] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Vitamin D and the vitamin D receptor (VDR) are important in the metabolic processes that affect bone mineral density (BMD). However, the effect of VDR BsmI polymorphism on BMD in pediatric patients is still unclear. METHODS Eligible studies were identified from the following electronic databases: PubMed, Embase, the Cochrane Library, and the Chinese CNKI and Wanfang databases before October 1, 2016. Data were extracted from the eligible studies, and associations between VDR BsmI polymorphism and BMD in pediatric patients were estimated with weighted mean differences (WMDs) and 95% confidence intervals (CIs). Subgroup analysis of ethnicity and sensitivity analyses were used to identify sources of heterogeneity. RESULTS A significant difference was observed between VDR BsmI polymorphism and pediatric BMD levels of the lumbar spine (LS) in the corecessive model (bb vs BB + Bb: WMD = -0.23, 95% CI [-0.35, -0.11], P < 0.01). No significant relationship was found in the dominant, recessive, or codominant models for LS BMD (BB vs Bb: WMD = -0.56, 95% CI [-1.58, 0.46], P = 0.29; BB vs bb: WMD = -0.54, 95% CI [-1.49, 0.41], P = 0.27; and BB vs Bb + bb: WMD = -0.45, 95% CI [-1.71, 0.26], P = 0.22). In addition, we found no remarkable association between the BsmI polymorphism and BMD levels of the femoral neck (FN) in children (BB vs Bb: WMD = -1.08, 95% CI [-3.13, 0.96], P = 0.30; BB vs bb: WMD = 0.98, 95% CI [-0.89, 2.85], P = 0.31; BB vs Bb + bb: WMD = -0.061, 95% CI [-0.30, 0.17], P = 0.61; and bb vs BB + Bb: WMD = 0.82, 95% CI [-0.59, 2.32], P = 0.25). CONCLUSION Our meta-analysis found that the VDR BsmI genetic polymorphism was correlated with LS BMD level in pediatric patients: compared with those with the B allele, children with the bb genotype were less likely to have lower BMD levels. No significant difference was identified in the pediatric FN BMD levels.
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Affiliation(s)
| | | | | | | | | | - Feng Le
- Department of Protection, Affiliated Yixing People Hospital, Jiangsu University, Yixing, China
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Zhang P, Li Q, Qi J, Lv Q, Zheng X, Wu X, Gu J. Association between vitamin D receptor gene polymorphism and ankylosing spondylitis in Han Chinese. Int J Rheum Dis 2016; 20:1510-1516. [PMID: 27778467 DOI: 10.1111/1756-185x.12949] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pingping Zhang
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
- Department of Pediatrics; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
| | - Qiuxia Li
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
| | - Jun Qi
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
| | - Qing Lv
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
| | - Xuqi Zheng
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
| | - Xinyu Wu
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
| | - Jieruo Gu
- Department of Rheumatology; The Third Affiliated Hospital of Sun Yat-Sen University; Guangzhou China
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Limketkai BN, Bechtold ML, Nguyen DL. Vitamin D and the Pathogenesis of Inflammatory Bowel Disease. Curr Gastroenterol Rep 2016; 18:52. [PMID: 27538982 DOI: 10.1007/s11894-016-0526-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Vitamin D has traditionally been known for its role in bone metabolism, but emerging evidence has suggested a broader role for vitamin D in immune regulation. Vitamin D deficiency has been associated with the pathogenesis of diverse autoimmune disorders and has similarly been implicated as a contributor to inflammatory bowel disease. In this review, we discuss animal, in vitro, genetic, and epidemiologic studies that have linked vitamin D deficiency with inflammatory bowel disease pathogenesis or severity. Nonetheless, we present the caveat in interpreting these studies in the context of reverse causation: Does vitamin D deficiency lead to gastrointestinal disease, or does gastrointestinal disease (with related changes in dietary choices, intestinal absorption, nutritional status, lifestyle) lead to vitamin D deficiency?
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Affiliation(s)
- Berkeley N Limketkai
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, Alway M211, Stanford, CA, 94305, USA.
| | - Matthew L Bechtold
- Division of Gastroenterology and Hepatology, University of Missouri School of Medicine, Columbia, MO, USA
| | - Douglas L Nguyen
- Division of Gastroenterology, University of California, Irvine, CA, USA
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Čierny D, Michalik J, Škereňová M, Kantorová E, Sivák Š, Javor J, Kurča E, Dobrota D, Lehotský J. ApaI, BsmI and TaqI VDR gene polymorphisms in association with multiple sclerosis in Slovaks. Neurol Res 2016; 38:678-84. [PMID: 27338176 DOI: 10.1080/01616412.2016.1200287] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Vitamin D acts through vitamin D receptor (VDR) and has promising beneficial effects in the development and progression of multiple sclerosis (MS). The purpose of our study was to investigate the possible association of the VDR gene polymorphisms ApaI, BsmI and TaqI with the MS susceptibility and with the rate of disease disability progression in the Central European Slovak population. METHODS The allele and genotype variants of ApaI, TaqI and BsmI VDR gene polymorphisms were analysed in 270 clinically diagnosed MS patients and 303 healthy controls. Genotyping was performed by polymerase chain reaction and restriction analysis. Patients were stratified by the rate of disease disability progression using MSSS scores. RESULTS By logistic regression analysis, we revealed that genotype BB (AA) of BsmI VDR gene polymorphism is decreasing the risk of MS (BB (AA) vs Bb (AG) + bb (GG); OR = 0.59, 95% CI = 0.39-0.90, plog = 0.014). We did not identify any association of ApaI and TaqI polymorphisms neither with MS development nor with the disease progression. DISCUSSION We showed for the first time that BsmI genotype BB (AA) is associated with the decreased susceptibility to MS in Slovak population. We propose the BsmI gene polymorphism to be one of the important genetic markers in evaluation of the risk of MS. However, our data suggest that VDR gene polymorphisms ApaI, BsmI and TaqI are not useful in the prediction of disease disability progression rate in MS in Slovaks.
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Affiliation(s)
- Daniel Čierny
- a Department of Clinical Biochemistry, Jessenius Faculty of Medicine , Comenius University in Bratislava and University Hospital Martin , Martin , Slovak Republic
| | - Jozef Michalik
- c Department of Neurology, Jessenius Faculty of Medicine , Comenius University in Bratislava and University Hospital Martin , Martin , Slovak Republic
| | - Mária Škereňová
- a Department of Clinical Biochemistry, Jessenius Faculty of Medicine , Comenius University in Bratislava and University Hospital Martin , Martin , Slovak Republic
| | - Ema Kantorová
- c Department of Neurology, Jessenius Faculty of Medicine , Comenius University in Bratislava and University Hospital Martin , Martin , Slovak Republic
| | - Štefan Sivák
- c Department of Neurology, Jessenius Faculty of Medicine , Comenius University in Bratislava and University Hospital Martin , Martin , Slovak Republic
| | - Juraj Javor
- d Institute of Immunology, Faculty of Medicine , Comenius University in Bratislava , Bratislava , Slovakia
| | - Egon Kurča
- c Department of Neurology, Jessenius Faculty of Medicine , Comenius University in Bratislava and University Hospital Martin , Martin , Slovak Republic
| | - Dušan Dobrota
- b Department of Medical Biochemistry and BioMed, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Martin , Slovak Republic
| | - Ján Lehotský
- b Department of Medical Biochemistry and BioMed, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Martin , Slovak Republic
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Matías-Guíu J, Oreja-Guevara C, Matias-Guiu JA, Gomez-Pinedo U. Vitamin D and remyelination in multiple sclerosis. Neurologia 2016; 33:177-186. [PMID: 27321170 DOI: 10.1016/j.nrl.2016.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Accepted: 05/12/2016] [Indexed: 12/01/2022] Open
Abstract
INTRODUCTION Several studies have found an association between multiple sclerosis and vitamin D (VD) deficiency, which suggests that VD may play a role in the immune response. However, few studies have addressed its role in remyelination. DEVELOPMENT The VD receptor and the enzymes transforming VD into metabolites which activate the VD receptor are expressed in central nervous system (CNS) cells, which suggests a potential effect of VD on the CNS. Both in vitro and animal model studies have shown that VD may play a role in myelination by acting on factors that influence the microenvironment which promotes both proliferation and differentiation of neural stem cells into oligodendrocyte progenitor cells and oligodendrocytes. It remains unknown whether the mechanisms of internalisation of VD in the CNS are synergistic with or antagonistic to the mechanisms that facilitate the entry of VD metabolites into immune cells. CONCLUSIONS VD seems to play a role in the CNS and our hypothesis is that VD is involved in remyelination. Understanding the basic mechanisms of VD in myelination is necessary to manage multiple sclerosis patients with VD deficiency.
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Affiliation(s)
- J Matías-Guíu
- Servicio de Neurología, Hospital Clínico San Carlos, Facultad de Medicina, Universidad Complutense, IdiSSC, Madrid, España.
| | - C Oreja-Guevara
- Servicio de Neurología, Hospital Clínico San Carlos, Facultad de Medicina, Universidad Complutense, IdiSSC, Madrid, España
| | - J A Matias-Guiu
- Servicio de Neurología, Hospital Clínico San Carlos, Facultad de Medicina, Universidad Complutense, IdiSSC, Madrid, España
| | - U Gomez-Pinedo
- Servicio de Neurología, Hospital Clínico San Carlos, Facultad de Medicina, Universidad Complutense, IdiSSC, Madrid, España
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Abdollahzadeh R, Fard MS, Rahmani F, Moloudi K, Kalani BS, Azarnezhad A. Predisposing role of vitamin D receptor (VDR) polymorphisms in the development of multiple sclerosis: A case-control study. J Neurol Sci 2016; 367:148-51. [PMID: 27423580 DOI: 10.1016/j.jns.2016.05.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 05/26/2016] [Accepted: 05/30/2016] [Indexed: 12/23/2022]
Abstract
Multiple sclerosis (MS) is a chronic inflammatory, demyelinating, and neurodegenerative disease of the central nervous system (CNS) with a complex etiology. Given the Vitamin D receptor (VDR) gene, it is considered an outstanding risk component associated with MS. The aim of the present study has been to explore and emphasize the role of ApaI, BsmI, TaqI and FokI polymorphisms of VDR gene in susceptibility to MS in an Iranian case-control population including 160 patients and 150 healthy controls. All cases were clinically diagnosed with relapsing-remitting (RR) form, and the controls were age, gender, and race matched which were completely in agreement with the case group. PCR-R FLP was conducted for all the SNPs genotyping. The findings of the study showed a significant difference in allele frequency between the cases and controls for ApaI (p<0.0002), BsmI (p<0.0002) and TaqI (p<0.0001), while no significant difference was observed for FokI (P>0.0125). The results also showed that AA genotype polymorphism of ApaI and BsmI (OR=4.6 and OR=2.52, respectively), CC genotype of TaqI (OR=2.41) and AC genotype of ApaI (OR=1.79) are associated with the disease status. Nevertheless, the results revealed the protective role of TT genotype of TaqI (ORs<1), CC genotype of Apal, and GG genotype of BsmI (ORs<1). VDR polymorphisms seem to have a notable connection with MS pathogenesis, however, study of more big population and functional work on the gene structure and its function are recommended.
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Affiliation(s)
- Rasoul Abdollahzadeh
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahsa Sobhani Fard
- Department of Immunology, School of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran; Student research center, Hamadan University of Medical sciences. Hamadan, Iran
| | - Farideh Rahmani
- Department of Medical Biotechnology, School of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran
| | - Kaveh Moloudi
- Department of Radiology and Radiobiology, school of Paramedical Science, Iran University of Medical Sciences, Tehran, Iran
| | - Behrooz Sadeghi Kalani
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Asaad Azarnezhad
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Cellular and Molecular research center, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Kurdistan, Iran.
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Tavakolpour S. Interleukin 7 receptor polymorphisms and the risk of multiple sclerosis: A meta-analysis. Mult Scler Relat Disord 2016; 8:66-73. [PMID: 27456877 DOI: 10.1016/j.msard.2016.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 04/17/2016] [Accepted: 05/01/2016] [Indexed: 12/22/2022]
Abstract
BACKGROUND Multiple sclerosis (MS) is considered as the most common chronic inflammatory neurologic disorder diagnosed in young adults. Both environmental and genetic factors may influence risk of MS development. Interleukin 7 receptor (IL7R) is one of the most studied gene polymorphism on MS that may play a possible role in MS development. The most studied polymorphism of IL7R gene is "rs6897932" polymorphism on IL7Rα gene (IL7RA). METHODS PubMed, Scopus, and Google scholar databases were searched for all of related studies on the association of IL7RA polymorphism with single nucleotide polymorphism (SNP) ID of "rs6897932" and the risk of MS through August 07, 2015. After exclusion of irrelevant articles, 11 eligible studies were selected, which were analyzed to determine an association between the MS and IL7R T244I polymorphism (rs6897932). For identification of this association, odds ratios (ORs) and 95% confidence interval (95% CI) were calculated. Four models of allelic (T vs. C), co-dominant genotype (TT vs. CC), dominant (TT+CT vs. CC), and recessive genotypes (TT vs. CT+CC) were considered to check the possible role of rs6897932 polymorphism in MS. A sensitivity analysis was conducted to find the reliability of this study. Furthermore, funnel plots were used to evaluate publication bias. RESULTS A total of 11 case-control studies were identified through this meta-analysis, which containing 6752 cases and 7349 controls. In overall, the frequency of the C allele was found to be higher in patients with MS compared to healthy controls (75.66% vs. 72.19%). T allele was significantly associated with the decreased risk of MS in a random effect model (T vs. C: OR=0.84, 95% CI=0.77-0.92, P-value <0.001). In the co-dominant, dominant, and recessive genotypes models, a significant association between the IL7R T244I polymorphism and MS risk was demonstrated (TT vs. CC: OR=0.70, 95% CI=0.61-0.80, P-value <0.001; TT+CT vs. CC: OR=0.82, 95% CI=0.73-0.92, P-value <0.001; TT vs. CT+CC: OR=0.76, 95% CI=0.66-0.87, P-value <0.001). Sensitivity analysis revealed that this study is reliable. There was no evidence of publication bias. CONCLUSION It was demonstrated that the IL7R T244I polymorphism was associated with susceptibility to MS. However, more well-designed studies with large sample size are needed to validate this association between this single nucleotide polymorphism and MS.
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Affiliation(s)
- Soheil Tavakolpour
- Iran University of Medical Sciences, Tehran, Iran; Neuroscience Research center, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Neurology, Tehran University of Medical Sciences, Tehran, Iran.
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Yamout B, Karaky NM, Mahfouz RAR, Jaber F, Estaitieh N, Shamaa D, Abbas F, Hoteit R, Daher RT. Vitamin D receptor biochemical and genetic profiling and HLA-class II genotyping among Lebanese with multiple sclerosis - A pilot study. J Neuroimmunol 2016; 293:59-64. [PMID: 27049563 DOI: 10.1016/j.jneuroim.2016.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 02/09/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND Multiple sclerosis (MS) is an autoimmune demyelinating disease affecting mostly young adult females with multifactorial etiology. Recent studies suggested that adequate vitamin D levels may lower the risk of developing MS. OBJECTIVES Our aim was to explore the relationship between vitamin D receptor (VDR) polymorphism, HLA-DR locus genotype, and serum vitamins D and A levels in the Lebanese population. METHODS Fifty MS patients were recruited for this study. The control group consisted of 48 healthy and 51 patients with other neurological disorders (non-MS). Biochemical analysis included serum 25 hydroxyvitamin D (25OHD) and vitamin A. Molecular analysis targeted VDR genotypes (ApaI, TaqI and BsmI) and low resolution HLA typing for DRB1 locus. RESULTS Healthy and non-MS groups had comparable parameters and were combined into one control group. No significant differences were found between MS and control groups for VDR genotypes. The frequency of HLA-DRB1*15 was significantly higher in MS patients (22%) compared to controls (8%) (p=0.018). Odds ratio for MS in the presence of DRB1*15 allele was 3.21 (p=0.018). Cosegregation with A (ApaI) and b (BsmI) alleles did not influence the risk for MS. 25OHD levels were significantly higher in MS patients compared to controls (p=0.002), due to more frequent oral supplementation (p=0.005). Vitamin A levels were comparable between the two groups. When all parameters were included in a logistic regression model adjusted for supplementation, only HLA-DRB1*15 (OR=3.42; p=0.027) contributed significantly to MS risk. CONCLUSION There was no association between serum vitamin D or A or VDR genotypes and MS. HLA-DRB1*15 was the major factor imposing more than 3 folds greater risk for developing MS among Lebanese.
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Affiliation(s)
- Bassem Yamout
- Multiple Sclerosis Center, Department of Neurology, American University of Beirut Medical Center, Lebanon
| | - Nathalie M Karaky
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon
| | - Rami A R Mahfouz
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon
| | - Fadel Jaber
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon
| | - Nour Estaitieh
- Department of Neurology, American University of Beirut Medical Center, Lebanon
| | - Dina Shamaa
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon
| | - Fatmeh Abbas
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon
| | - Rouba Hoteit
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon
| | - Rose T Daher
- Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Lebanon.
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Sato F, Omura S, Jaffe S, Tsunoda I. Role of CD4+ T Cells in the Pathophysiology of Multiple Sclerosis. MULTIPLE SCLEROSIS 2016. [PMCID: PMC7150304 DOI: 10.1016/b978-0-12-800763-1.00004-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Multiple sclerosis (MS) is an inflammatory demyelinating disease of the central nervous system. Although the precise etiology of MS remains unclear, CD4+ T cells have been proposed to play not only effector but also regulatory roles in MS. CD4+ T cells can be divided into four subsets: pro-inflammatory helper T (Th) 1 and Th17 cells, anti-inflammatory Th2 cells and regulatory T cells (Tregs). The roles of CD4+ T cells in MS have been clarified by either “loss-of-function” or “gain-of-function” methods, which have been carried out mainly in autoimmune and viral models of MS: experimental autoimmune encephalomyelitis and Theiler's murine encephalomyelitis virus infection, respectively. Observations in MS patients were consistent with the mechanisms found in the MS models, that is, increased pro-inflammatory Th1 and Th17 activity is associated with disease exacerbation, while anti-inflammatory Th2 cells and Tregs appear to play a protective role.
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Meng S, He ST, Jiang WJ, Xiao L, Li DF, Xu J, Shi XH, Zhang JA. Genetic susceptibility to autoimmune thyroid diseases in a Chinese Han population: Role of vitamin D receptor gene polymorphisms. ANNALES D'ENDOCRINOLOGIE 2015; 76:684-9. [PMID: 26593863 DOI: 10.1016/j.ando.2015.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 11/14/2014] [Accepted: 01/21/2015] [Indexed: 11/18/2022]
Abstract
PURPOSE Previous studies have found that some immune-related genes were associated with autoimmune thyroid diseases (AITDs). A couple of studies have explored the association between vitamin D (1,25-dihydroxyvitamin D3) receptor (VDR) gene polymorphisms and susceptibility to AITDs in different populations and found conflicting results. This case-control study was designed to evaluate the role of polymorphisms of VDR gene in the predisposition of AITDs in a Chinese Han population. METHODS A total of 417 patients with Graves' disease (GD), 250 patients with Hashimoto's thyroiditis (HT) and 301 healthy subjects were enrolled. The Matrix Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometer (MALDI-TOF-MS) Platform was applied to detect four SNPs (rs1544410, rs2228570, rs731236 and rs7975232) in the VDR gene. RESULTS In the rs7975232 allele A frequency showed a significant increase in GD patients (30.34% vs. 25.42% in controls; P=0.041, OR=1.278, 95%CI=1.010-1.617). However, no relationship was found between clinical phenotypes and the four SNPs. CONCLUSIONS This result suggests that the VDR gene may be one susceptibility gene which contributes to the risk of GD.
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Affiliation(s)
- Shuai Meng
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Shuang-tao He
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Wen-juan Jiang
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Ling Xiao
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Dan-feng Li
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Jian Xu
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Xiao-hong Shi
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China
| | - Jin-an Zhang
- Department of Endocrinology, Jinshan Hospital of Fudan University, 1508, Longhang Road, Shanghai 201508, China.
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The Association of Vitamin D Receptor Polymorphisms with Multiple Sclerosis in a Case-Control Study from Kuwait. PLoS One 2015; 10:e0142265. [PMID: 26540116 PMCID: PMC4634763 DOI: 10.1371/journal.pone.0142265] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 10/20/2015] [Indexed: 11/25/2022] Open
Abstract
Vitamin D deficiency is associated with several diseases including multiple sclerosis (MS). Several factors influence vitamin D levels and its optimal multi-function maintenance. Our objective was to assess quantifiable variables influencing vitamin D level and metabolism in MS patients from Kuwait. In a case-control study involving 50 MS patients, and 50 healthy control individuals for which plasma vitamin D levels, supplement use, vitamin D receptor (VDR) variants, and skin pigmentation indices were ascertained; we found overall vitamin D levels to be deficient in both groups, and supplement use to be common practice. VDR variants TaqI and BsmI associated with MS risk, and ApaI associated with low disease progression. VDR variant FokI associated with higher vitamin D levels in both groups. We conclude that several quantifiable variables related to vitamin D associate with MS suggesting a possible clinical immuno-modulatory application of vitamin D for MS patients in Kuwait.
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Vitamin D receptor polymorphisms and 25-hydroxyvitamin D in a group of Sicilian multiple sclerosis patients. Neurol Sci 2015; 37:261-7. [DOI: 10.1007/s10072-015-2401-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 10/14/2015] [Indexed: 11/25/2022]
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Cheon CK, Nam HK, Lee KH, Kim SY, Song JS, Kim C. Vitamin D receptor gene polymorphisms and type 1 diabetes mellitus in a Korean population. Pediatr Int 2015; 57:870-4. [PMID: 25808747 DOI: 10.1111/ped.12634] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Revised: 01/27/2015] [Accepted: 02/19/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Vitamin D receptor (VDR) has been suggested to play a role in the pathogenesis of type 1 diabetes mellitus (T1DM). There has been no case-control study examining the association between VDR polymorphisms and T1DM among Korean subjects with a low incidence of T1DM. METHODS Eighty-one T1DM patients and 113 unrelated healthy controls with no history of DM or other autoimmune diseases were investigated at either Pusan National University Children's Hospital or Korea University Anam Hospital between March 2009 and September 2013. Polymerase chain reaction-restriction fragment length polymorphism was utilized to genotype single nucleotide substitutions at TaqI, BsmI, and ApaI alleles. RESULTS All frequencies in T1DM and control subjects were in Hardy-Weinberg equilibrium, although ApaI in controls and TaqI in T1DM showed relatively weak equilibrium. TaqI and BsmI differences were significant (P = 0.045 and P = 0.012, respectively) after applying Bonferroni correction. The TT genotype carrier frequency among controls was higher than among the T1DM patients (P = 0.015; OR, 2.98; 95%CI: 1.19-7.42). T allele frequency was higher among controls than T1DM patients (P = 0.019; OR, 2.78; 95%CI: 1.15-6.72). The frequency of bb genotype carriers among controls was higher than among T1DM patients (P = 0.004; OR, 4.13; 95%CI: 1.4-12.10). The frequency of the b allele among controls was higher than that among T1DM patients (P = 0.016; OR, 3.20; 95%CI: 1.19-8.60). CONCLUSIONS T and b TaqI and BsmI alleles are protective against T1DM in Korean subjects.
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Affiliation(s)
- Chong-Kun Cheon
- Department of Pediatrics, Pediatric Endocrinology, Pusan National University Children's Hospital, Pusan National University School of Medicine, Yangsan
| | - Hyo-Kyoung Nam
- Department of Pediatrics, College of Medicine, Korea University, Seoul
| | - Kee-Hyoung Lee
- Department of Pediatrics, College of Medicine, Korea University, Seoul
| | - Su Yung Kim
- Department of Pediatrics, Pediatric Endocrinology, Pusan National University Children's Hospital, Pusan National University School of Medicine, Yangsan
| | - Ji Sun Song
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Gyeongnam
| | - Choongrak Kim
- Department of Statistics, Pusan National University, Pusan, South Korea
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Niino M, Miyazaki Y. Genetic polymorphisms related to vitamin D and the therapeutic potential of vitamin D in multiple sclerosis. Can J Physiol Pharmacol 2015; 93:319-25. [DOI: 10.1139/cjpp-2014-0374] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Vitamin D receptors (VDRs), which are responsible for most vitamin D functions, are expressed on various immune cells. Vitamin D is considered to be a potent immunomodulator. A variety of cells in the central nervous system (CNS) also express VDRs; thus, vitamin D may play a role in the regulation of neurodegeneration and repair processes within the CNS. Considered together with epidemiological studies, low vitamin D status is reckoned to be one of the risk factors for multiple sclerosis (MS). Further, vitamin D is considered to be a possible treatment for MS. However, previous clinical trials with small cohorts have not demonstrated significant effects of vitamin D in MS. Current ongoing clinical trials with large cohorts could provide answers with respect to the clinical effects of vitamin D in MS. However, genetic studies have suggested that genes associated with vitamin D, including VDRs, are susceptible genes for MS. Vitamin D needs to be considered from the perspective of the interaction between vitamin-D-related genetic factors and environmental factors affecting vitamin D levels.
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Affiliation(s)
- Masaaki Niino
- Department of Clinical Research, Hokkaido Medical Center, Sapporo, Japan
| | - Yusei Miyazaki
- Department of Clinical Research, Hokkaido Medical Center, Sapporo, Japan
- Department of Neurology, Hokkaido Medical Center, Sapporo, Japan
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Ben-Selma W, Ben-Fredj N, Chebel S, Frih-Ayed M, Aouni M, Boukadida J. Age- and gender-specific effects on VDR gene polymorphisms and risk of the development of multiple sclerosis in Tunisians: a preliminary study. Int J Immunogenet 2015; 42:174-81. [PMID: 25892553 DOI: 10.1111/iji.12197] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 02/16/2015] [Accepted: 03/04/2015] [Indexed: 12/15/2022]
Abstract
The vitamin D receptor (VDR) polymorphisms have been reported to be associated with multiple sclerosis (MS); however, evidence remains conflicting. In this report, we investigated the association between two single nucleotide polymorphisms (SNPs) TaqI and ApaI of VDR gene and risk development of MS. TaqI and ApaI SNPs were detected by PCR-RFLP from the DNA of 60 Tunisian patients with MS and 114 healthy controls. Our results show a significant difference of the allelic frequency distribution between the case and control groups for TaqI SNP (P = 0.01), but genotype frequencies were not significantly different (P = 0.07 and 0.23). When adjusting frequency distribution of different alleles and genotypes by age, we found that the difference between the T allele frequencies of this SNP in the group of patients age [15-24] in comparison with the control group of the same age group was statistically significant (P = 0.026). Moreover, frequency of the T allele was significantly higher in male patients compared with controls of the same sex (P = 0.017). However, neither the genotype nor the allele frequency distribution was significantly different between the MS and control populations for the ApaI SNP. Our preliminary results indicate that VDR gene polymorphism could be associated with susceptibility to MS. The role of VDR gene polymorphism should be further studied in other large populations, and the distribution of other polymorphism, such as FokI and BsmI, should be also analysed to confirm another susceptibility polymorphisms gene for MS and to obtain more adequate strategies for treatment of MS.
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Affiliation(s)
- W Ben-Selma
- Laboratory of Microbiology and Immunology, UR12SP34, Farhat Hached University Hospital, Sousse, Tunisia
| | - N Ben-Fredj
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
| | - S Chebel
- Department of Neurology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - M Frih-Ayed
- Department of Neurology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - M Aouni
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
| | - J Boukadida
- Laboratory of Microbiology and Immunology, UR12SP34, Farhat Hached University Hospital, Sousse, Tunisia
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Tizaoui K, Kaabachi W, Hamzaoui A, Hamzaoui K. Association between vitamin D receptor polymorphisms and multiple sclerosis: systematic review and meta-analysis of case-control studies. Cell Mol Immunol 2015; 12:243-52. [PMID: 24998351 PMCID: PMC4654294 DOI: 10.1038/cmi.2014.47] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 05/01/2014] [Accepted: 05/25/2014] [Indexed: 12/31/2022] Open
Abstract
Vitamin D receptor (VDR) polymorphisms have been studied as potential contributors to multiple sclerosis (MS). However, published studies differ with respect to study design and the significance of the effects detected. The aim of this study was to quantify the magnitude of the risk associated with the TaqI, BsmI, ApaI and FokI VDR polymorphisms in MS using a meta-analysis approach. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, we conducted a systematic search and meta-analysis of the literature. Subgroup analyses were performed to detect potential sources of heterogeneity from the selected study characteristics. The stability of the summary risk was evaluated using sensitivity analyses. The meta-analysis included a total of 3300 cases and 3194 controls from 13 case-control studies. There were no significant associations found between TaqI and BsmI polymorphisms and MS risk. The association between the ApaI polymorphism and MS risk was significant in the homozygous and codominant models (P=0.013 and P=0.031, respectively), suggesting that the AA ApaI genotype might be a significant MS risk factor. Publication year and age significantly affected the association between TaqI polymorphisms and MS (P=0.014 and P=0.010, respectively), which indicates a protective effect of the major T allele. The AA ApaI and FF FokI genotypes are significant risk factors for MS. The association between the TaqI polymorphism and MS risk is significantly affected by study characteristics.
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Affiliation(s)
- Kalthoum Tizaoui
- Tunis El Manar University, Faculty of Medicine Tunis, Division of Histology and Immunology. Department of Basic Sciences, Tunis, Tunisia
| | - Wajih Kaabachi
- Tunis El Manar University, Faculty of Medicine Tunis, Division of Histology and Immunology. Department of Basic Sciences, Tunis, Tunisia
| | - Agnès Hamzaoui
- 1] Tunis El Manar University, Faculty of Medicine Tunis, Division of Histology and Immunology. Department of Basic Sciences, Tunis, Tunisia [2] Abderrahman Mami Hospital, Pneumology Service, Pavilion B, Ariana, Tunisia
| | - Kamel Hamzaoui
- Tunis El Manar University, Faculty of Medicine Tunis, Division of Histology and Immunology. Department of Basic Sciences, Tunis, Tunisia
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Vitamin D Receptor Gene Polymorphism and the Risk of Multiple Sclerosis in South Eastern of Iran. J Mol Neurosci 2015; 56:572-6. [PMID: 25854779 DOI: 10.1007/s12031-015-0513-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/04/2015] [Indexed: 10/24/2022]
Abstract
Multiple sclerosis is one of the most widespread demyelinating diseases of the central nervous system. Environmental and genetic factors are collaborating in triggering MS. The role of vitamin D receptor (VDR) gene and its polymorphisms are highlighted as susceptible components. The aim of the present study was to examine the association of single nucleotide polymorphism (SNP)-BsmI and FokI-in VDR gene and MS susceptibility in the South Eastern Iranian population. Therefore, 113 MS patients and 122 controls were recruited in the study. Restriction fragment length polymorphism was performed to detect the SNPs. There were no significant differences in the polymorphism of FokI (rs2228570) in VDR gene among patients and controls (P > 0.05), while a significant difference was observed in BsmI (rs1544410) polymorphism in healthy subjects and homozygous genotype-b/b- with MS (P = 0.025). Results showed a protective association of homozygous genotype-b/b- of BsmI with MS susceptibility in a population in South Eastern of Iran.
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Positive association of vitamin D receptor gene variations with multiple sclerosis in South East Iranian population. BIOMED RESEARCH INTERNATIONAL 2015; 2015:427519. [PMID: 25685788 PMCID: PMC4320885 DOI: 10.1155/2015/427519] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 12/23/2014] [Accepted: 12/24/2014] [Indexed: 02/03/2023]
Abstract
Among the factors postulated to play a role in MS susceptibility, the role of vitamin D is outstanding. Since the function of vitamin D receptor (VDR) represents the effect of vitamin D on the body and genetic variations in VDR gene may affect its function, we aim to highlight the association of two VDR gene polymorphisms with MS susceptibility. In current study, we recruited 113 MS patients and 122 healthy controls. TaqI (rs731236) and ApaI (rs7975232) genetic variations in these two groups were evaluated using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. All genotype and allele frequencies in both variations showed association with the disease status. However, to find the definite connection between genetic variations in VDR gene and MS disease in a population of South East of Iran, more researches on gene structure and its function with regard to patients' conditions are required.
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Čierny D, Michalik J, Kurča E, Dobrota D, Lehotský J. FokI vitamin D receptor gene polymorphism in association with multiple sclerosis risk and disability progression in Slovaks. Neurol Res 2014; 37:301-8. [DOI: 10.1179/1743132814y.0000000459] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Iordanidou M, Paraskakis E, Giannakopoulou E, Tavridou A, Gentile G, Borro M, Simmaco M, Chatzimichael A, Bush A, Manolopoulos VG. Vitamin D receptor ApaI a allele is associated with better childhood asthma control and improvement in ability for daily activities. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2014; 18:673-81. [PMID: 25353337 DOI: 10.1089/omi.2014.0023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Vitamin D levels have been suggested as a marker of disease severity in asthmatic children. Our aim was to investigate possible associations between the vitamin D receptor (VDR) FokI, BsmI, ApaI, and TaqI polymorphisms and asthma susceptibility and control in children. 127 Greek children with asthma and 91 healthy controls were genotyped for VDR FokI, BsmI ApaI, and TaqI polymorphisms using Sequenom MassARRAY iPLEX platform. Asthma control was assessed according to the Global Initiative for Asthma guidelines (GINA) and Childhood Asthma Control Test (C-ACT) and, for the first time, tested for its possible association with VDR SNPs. Asthmatic children were grouped as "controlled (n=49)", "partially controlled (n=38)," and "uncontrolled (n=40)," according to GINA classification. No association was found between VDR polymorphisms and asthma prevalence. Asthmatic children with the VDR ApaI aa genotype had significantly higher C-ACT score compared with asthmatic children carrying the AA/AC VDR ApaI genotypes (p=0.011). The frequency of VDR ApaI aa genotype was significantly higher in controlled asthma group (n=92) than uncontrolled asthma group (n=35), according to C-ACT (24.5% vs 0.0%, p<0.001) and GINA (32.7% vs 7.5%, p=0.001). Also, VDR ApaI aa genotype was negatively associated with limitation in daily activities because of asthma (p=0.004). VDR ApaI aa genotype was positively associated with well-controlled asthma according to GINA and C-ACT questionnaire and negatively associated with decreased limitation in daily activities in asthmatic children, further supporting the importance of Vitamin D pathway in asthma.
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Affiliation(s)
- Maria Iordanidou
- 1 Laboratory of Pharmacology, Medical School, Democritus University of Thrace , Alexandroupolis, Greece
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Yang CY, Leung PSC, Adamopoulos IE, Gershwin ME. The implication of vitamin D and autoimmunity: a comprehensive review. Clin Rev Allergy Immunol 2014; 45:217-26. [PMID: 23359064 DOI: 10.1007/s12016-013-8361-3] [Citation(s) in RCA: 178] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Historically, vitamin D has been associated with the regulation of bone metabolism. However, increasing evidence demonstrates a strong association between vitamin D signaling and many biological processes that regulate immune responses. The discovery of the vitamin D receptor in multiple immune cell lineages, such as monocytes, dendritic cells, and activated T cells credits vitamin D with a novel role in modulating immunological functions and its subsequent role in the development or prevention of autoimmune diseases. In this review we, discuss five major areas in vitamin D biology of high immunological significance: (1) the metabolism of vitamin D; (2) the significance of vitamin D receptor polymorphisms in autoimmune diseases, such as multiple sclerosis, type 1 diabetes mellitus, and systemic lupus erythematosus; (3) vitamin D receptor transcriptional regulation of immune cell lineages, including Th1, Th17, Th2, regulatory T, and natural killer T cells; (4) the prevalence of vitamin D insufficiency/deficiency in patients with multiple sclerosis, type 1 diabetes mellitus, and systemic lupus erythematosus; and finally, (5) the therapeutic effects of vitamin D supplementation on disease severity and progression.
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Affiliation(s)
- Chen-Yen Yang
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis School of Medicine, 451 Health Sciences Drive, Suite 6510, Davis, CA, 95616, USA
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Mo C, Lu Y, Deng Y, Wang J, Xie L, Li T, He Y, Qin X, Li S. Lack of association between vitamin D receptor gene ApaI, BsmI, and TaqI polymorphisms and primary biliary cirrhosis risk: a meta-analysis. Tumour Biol 2014; 35:4913-20. [PMID: 24526415 DOI: 10.1007/s13277-014-1645-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Accepted: 01/12/2014] [Indexed: 12/31/2022] Open
Abstract
Previous studies have reported the association between vitamin D receptor (VDR) polymorphisms and the risk of primary biliary cirrhosis (PBC), although these results remain controversial. The aim of this meta-analysis was to evaluate the association of three polymorphisms in VDR with PBC risk. The relevant studies were identified through an electronic database search carried out in September 2013. The crude odds ratio (OR) and 95% confidence interval (CI) were calculated to assess the association between VDR polymorphisms and PBC risk. Six eligible studies which met our selection criteria were included. Overall, the ApaI, BsmI, and TaqI polymorphisms in the VDR gene were not associated with PBC risk (ApaI A vs a OR = 1.132, 95% CI = 0.870-1.472, p = 0.355; BsmI B vs b OR = 1.148, 95% CI = 0.697-1.891, p = 0.589; TaqI t vs T OR = 1.1432, 95% CI = 0.709-1.841, p = 0.584). Furthermore, in subgroup analysis by ethnicity for the ApaI, BsmI, and TaqI polymorphisms, there were no significant results in either Caucasians or Asians under the allele contrast and recessive and dominant models. This meta-analysis indicated that VDR polymorphisms were not a risk factor for PBC. Larger and more carefully designed studies are needed to verify our results.
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Affiliation(s)
- Cuiju Mo
- Department of Clinical Laboratory, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, China
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Abstract
Multiple sclerosis (MS) patients are classified as either having relapsing onset or progressive onset disease, also known as primary progressive MS (PPMS). Relative to relapsing onset patients, PPMS patients are older at disease onset, are equally likely to be men or women, and have more rapid accumulation of disability that does not respond well to treatments used in relapsing onset MS. Although estimates vary, 5-15% of all MS patients have a PPMS disease course. Genetic variance is a proposed determinant of MS disease course. If distinct genes associated with PPMS were identified study of these genes might lead to an understanding of the biology underlying disease progression and neural degeneration that are the hallmarks of PPMS. These genes and their biological pathways might also represent therapeutic targets. This chapter systematically reviews the PPMS genetic literature. Despite the intuitively appealing notion that differences between PPMS and relapsing onset MS are due to genetics, definite differences associated with these phenotypes at the major histocompatibility complex or elsewhere in the genome have not been found. Recent large-scale genome wide screens identified multiple genes associated with MS susceptibility outside the MHC. The genetic variants identified thus far make only weak individual contributions to MS susceptibility. If the genetic effects that contribute to the differences between PPMS and relapsing MS are similar in magnitude to those that distinguish MS from healthy controls then, given the relative scarcity of the PPMS phenotype, very large datasets will be needed to identify PPMS associated genes. International collaborative efforts could provide the means to identify such genes. Alternately, it is possible that factors other than genetics underlie the differences between these clinical phenotypes.
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Affiliation(s)
- Bruce A C Cree
- Department of Neurology, University of California, San Francisco, USA.
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Niino M, Miyazaki Y, Fukazawa T, Kikuchi S. Vitamin D and multiple sclerosis in Asians and Caucasians: environmental and genetic aspects. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/cen3.12058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Masaaki Niino
- Department of Clinical Research; Hokkaido Medical Center; Sapporo Japan
| | - Yusei Miyazaki
- Department of Clinical Research; Hokkaido Medical Center; Sapporo Japan
- Department of Neurology; Hokkaido Medical Center; Sapporo Japan
| | | | - Seiji Kikuchi
- Department of Neurology; Hokkaido Medical Center; Sapporo Japan
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50
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Mosavi R, Arababadi MK, Hassanshahi G, Azin H, Araste M, Salehabad VA, Vazirinejad R, Pourali R, Hakimi H, Kennedy D. Association of a Polymorphism Within Intron 8 But Not Exon 9 of the Vitamin D Receptor in Patients With Multiple Sclerosis of Southeastern Iranian Ethnicity. Lab Med 2013. [DOI: 10.1309/lm8gljhwing18clb] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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