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Daryabor G, Gholijani N, Kahmini FR. A review of the critical role of vitamin D axis on the immune system. Exp Mol Pathol 2023; 132-133:104866. [PMID: 37572961 DOI: 10.1016/j.yexmp.2023.104866] [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: 02/07/2023] [Revised: 08/05/2023] [Accepted: 08/08/2023] [Indexed: 08/14/2023]
Abstract
In recent years, the physiological and molecular functions of vitamin D (Vit-D) have been deeply investigated. At first, Vit-D was considered a regulator of mineral and skeletal homeostasis. However, due to the extensive-expression pattern of Vit-D receptor (VDR) in almost every non-skeletal cell, Vit-D is considered mainly a multifunctional agent with broad effects on various tissues, notably the immune system. The expression of VDR in immune cells such as dendritic cells, monocyte/macrophage, neutrophils, B cells and T cells has been well demonstrated. Besides, such immune cells are capable of metabolizing the active form of Vit-D which means that it can module the immune system in both paracrine and autocrine manners. Vit-D binding protein (DBP), that regulates the levels and homeostasis of Vit-D, is another key molecule capable of modulating the immune system. Recent studies indicate that dysregulation of Vit-D axis, variations in the DBP and VDR genes, and Vit-D levels might be risk factors for the development of autoimmune disease. Here, the current evidence regarding the role of Vit-D axis on the immune system, as well as its role in the development of autoimmune disease will be clarified. Further insight will be given to those studies that investigated the association between single nucleotide polymorphisms of DBP and VDR genes with autoimmune disease susceptibility.
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Affiliation(s)
- Gholamreza Daryabor
- Autoimmune Diseases Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nasser Gholijani
- Autoimmune Diseases Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Rezaei Kahmini
- Autoimmune Diseases Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
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Gunes A, Yazicioglu MB, Tiryaki C, Uren N, Ergul E, Simsek T, Cubukcu A. Evaluation of vitamin D receptor gene polymorphisms in patients with differentiated thyroid carcinomas and nodular goiter. Minerva Endocrinol (Torino) 2020; 46:317-324. [PMID: 32744437 DOI: 10.23736/s2724-6507.20.03160-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND The role of vitamin D has previously been determined in autoimmune and malignant thyroid diseases. We aimed to identify the haplotype distribution of single nucleotide polymorphisms (SNPs) in the vitamin D receptor (VDR) gene, which has been suggested to play a role in the pathogenesis of differentiated thyroid cancers and benign thyroid diseases. METHODS Two hundred and sixteen patients, 113 with benign and 103 with differentiated thyroid cancers, together with the same number of healthy controls, were included in the study. FokI, BsmI, ApaI, and TaqI SNPs in VDR were analyzed in all participants using the PCR-RFLP method. RESULTS When the patients with differentiated thyroid cancers or the patients with nodular goiter and control cases were compared for BsmI, ApaI or TaqI polymorphisms, three genotype distributions (BB, Bb, bb; AA, Aa, aa; TT, Tt, tt) were found to not differ significantly. When the patients with differentiated thyroid cancers and control cases were compared for the FokI polymorphism in the VDR gene, the three genotype distributions (FF, Ff, ff) did not differ. However, in patients with nodular goiter, the FF genotype in the FokI polymorphism of the VDR gene was found to be statistically significantly higher (P=0.033). CONCLUSIONS This is the first study in the literature evaluating the role of VDR gene SNPs in nodular goiter. We can suggest that SNP distribution in the VDR gene is not associated with malignancy but may cause some alterations in thyrocyte morphology and functions.
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Affiliation(s)
- Abdullah Gunes
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey -
| | - Murat B Yazicioglu
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Cagri Tiryaki
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Nihal Uren
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Emel Ergul
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Turgay Simsek
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Anil Cubukcu
- Department of General Surgery, University of Health Science, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
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Maciejewski A, Kowalczyk MJ, Gasińska T, Szeliga A, Prendecki M, Dorszewska J, Żaba R, Łącka K. The Role of Vitamin D Receptor Gene Polymorphisms in Thyroid-Associated Orbitopathy. Ocul Immunol Inflamm 2019; 28:354-361. [DOI: 10.1080/09273948.2019.1629605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Adam Maciejewski
- Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznan, Poland
| | - Michał J. Kowalczyk
- Department of Dermatology and Venereology, Poznan University of Medical Sciences, Poznan, Poland
| | - Teresa Gasińska
- Department of Internal Diseases and Oncological Chemotherapy, Medical University of Silesia, Katowice, Poland
| | - Anna Szeliga
- Student Scientific Society, Poznan University of Medical Sciences, Poznan, Poland
| | - Michał Prendecki
- Laboratory of Neurobiology, Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Jolanta Dorszewska
- Laboratory of Neurobiology, Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Ryszard Żaba
- Department of Dermatology and Venereology, Poznan University of Medical Sciences, Poznan, Poland
| | - Katarzyna Łącka
- Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznan, Poland
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Veneti S, Anagnostis P, Adamidou F, Artzouchaltzi AM, Boboridis K, Kita M. Association between vitamin D receptor gene polymorphisms and Graves' disease: a systematic review and meta-analysis. Endocrine 2019; 65:244-251. [PMID: 30924084 DOI: 10.1007/s12020-019-01902-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/12/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE The pathogenesis of Graves' disease (GD) and orbitopathy (GO) is not completely elucidated. On the other hand, vitamin D receptor (VDR) gene polymorphisms have been associated with vulnerability to a plethora of chronic autoimmune diseases. The primary aim of this study was to synthesize evidence on the association between VDR gene polymorphisms and GD. Secondary aim was to investigate their association with GO. METHODS A comprehensive search was conducted in PubMed, CENTRAL and Scopus, up to December 8, 2018. Data were expressed as odds ratio (OR) with 95% confidence intervals (CI). Heterogeneity was quantified with I2 index. RESULTS Ten studies were included in the qualitative and quantitative analysis. TT subtype of TaqI polymorphism was associated with an increased risk of GD compared with Tt and tt polymorphisms (OR: 1.42; 95% CI, 1.05-1.94, p = 0.025), whereas tt was associated with a lower risk of GD, compared with TT and Tt polymorphisms (OR: 0.79; 95% CI, 0.62-0.99, p = 0.043). No association was found for ApaI, BsmI, and FokI polymorphisms. The bb subtype of BsmI polymorphism was associated with a lower risk in Asian, but with a higher GD risk in Caucasian populations, compared with BB/Bb subtypes. No eligible study was found regarding the association between VDR gene polymorphisms and the risk of GO. CONCLUSIONS The TT subtype of the TaqI polymorphism was associated with a higher susceptibility for GD compared with Tt and tt. Regarding BsmI, the bb subtype was associated with increased GD risk in Caucasians, whereas it is protective in Asians.
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Affiliation(s)
- Stavroula Veneti
- Department of Endocrinology and Diabetes, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Panagiotis Anagnostis
- Department of Endocrinology and Diabetes, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece.
| | - Fotini Adamidou
- Department of Endocrinology and Diabetes, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | | | - Kostas Boboridis
- 1st University Department of Ophthalmology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Marina Kita
- Department of Endocrinology and Diabetes, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
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Gao XR, Yu YG. Meta-Analysis of the Association between Vitamin D Receptor Polymorphisms and the Risk of Autoimmune Thyroid Disease. Int J Endocrinol 2018; 2018:2846943. [PMID: 29765404 PMCID: PMC5885334 DOI: 10.1155/2018/2846943] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 12/01/2017] [Accepted: 12/17/2017] [Indexed: 01/20/2023] Open
Abstract
The association between vitamin D receptor (VDR) polymorphisms (rs731236, rs1544410, rs2228570, and rs7975232) and the risk of autoimmune thyroid disease (AITD) had been investigated in previous studies. However, the results of these studies remained controversial. Thus, a meta-analysis was performed to derive a more precise conclusion. All related articles were systematically searched by PubMed, Embase, Google Scholar, and Chinese National Knowledge Infrastructure (CNKI). The pooled odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to assess the strength of association. The overall results indicated that VDR rs731236 and rs2228570 polymorphisms were significantly associated with a reduced risk of AITD. However, a stratification analysis based on clinical types showed that VDR rs731236 and rs2228570 polymorphisms were associated only with a reduced risk of HT. A stratification analysis by ethnicity showed that VDR rs731236 polymorphism was significantly associated with a reduced risk of AITD in Asian and African populations. VDR rs2228570 polymorphism was associated with a reduced risk of AITD in Asian populations. VDR rs1544410 polymorphism was associated with a reduced risk of AITD in European and African populations, but with an increased risk of AITD in Asian populations. VDR rs7975232 polymorphism was significantly associated with an increased risk of AITD in African populations. In conclusion, the present study suggested that VDR rs731236, rs1544410, rs2228570, and rs7975232 polymorphisms were significantly associated with AITD risk. However, more well-designed studies should be performed to verify the current results.
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Affiliation(s)
- Xue-Ren Gao
- Department of Pediatric Endocrinology/Genetics, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
| | - Yong-Guo Yu
- Department of Pediatric Endocrinology/Genetics, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
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Abstract
The three common themes that underlie the induction and perpetuation of autoimmunity are genetic predisposition, environmental factors, and immune regulation. Environmental factors have gained much attention for their role in triggering autoimmunity, with increasing evidence of their influence as demonstrated by epidemiological studies, laboratory research, and animal studies. Environmental factors known to trigger and perpetuate autoimmunity include infections, gut microbiota, as well as physical and environmental agents. To address these issues, we will review major potential mechanisms that underlie autoimmunity including molecular mimicry, epitope spreading, bystander activation, polyclonal activation of B and T cells, infections, and autoinflammatory activation of innate immunity. The association of the gut microbiota on autoimmunity will be particularly highlighted by their interaction with pharmaceutical agents that may lead to organ-specific autoimmunity. Nonetheless, and we will emphasize this point, the precise mechanism of environmental influence on disease pathogenesis remains elusive.
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Affiliation(s)
- Annarosa Floreani
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy.
| | - Patrick S C Leung
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Via Giustiniani, 2, 35128, Padova, Italy
| | - M Eric Gershwin
- Division of Rheumatology, Allergy, and Clinical Immunology, University of California Davis, Davis, CA, USA
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Yasmeh J, Farpour F, Rizzo V, Kheradnam S, Sachmechi I. HASHIMOTO THYROIDITIS NOT ASSOCIATED WITH VITAMIN D DEFICIENCY. Endocr Pract 2016; 22:809-13. [PMID: 27018618 DOI: 10.4158/ep15934.or] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Vitamin D deficiency is associated with several autoimmune diseases. This study assessed whether vitamin D deficiency is associated with Hashimoto thyroiditis (HT). METHODS Two groups of patients were selected for which serum 25-hydroxyvitamin D (25(OH)D) levels had been measured: (1) a study group of patients diagnosed with HT as indicated by thyroid antibodies, and (2) a healthy control group. Each group was separated by sex and then controlled for age and body mass index (BMI). Groups' mean 25(OH)D levels were compared by analysis of variance (ANOVA), and percent frequencies of vitamin D sufficiency, insufficiency, and deficiency were compared with a Z-test. The correlations between 25(OH)D levels and thyroid antibodies and thyroid-stimulating hormone (TSH) levels were also tested. RESULTS The mean 25(OH)D levels for the HT and control groups were significantly different in females (30.75 vs. 27.56 ng/mL, respectively) but not in males (14.24 vs. 13.26 ng/mL). HT females had a higher rate of vitamin D sufficiency (51.7% vs. 31.1%) and a lower rate of insufficiency (48.3% vs. 68.9%) relative to control females. No such differences were found in the male groups. None of the females were vitamin D deficient, but almost all males were. A significant (P = .016) positive correlation (rs = 0.436) between 25(OH)D and TPOAb was observed in males. CONCLUSION HT is not associated with higher rates of vitamin D deficiency relative to a control group. ABBREVIATIONS BMI = body mass index HT = Hashimoto thyroiditis 25(OH)D = 25-hydroxyvitamin D TgAb = thyroglobulin antibody TSH = thyroid-stimulating hormone TPOAb = thyroid-peroxidase antibody VDR = Vitamin D receptor.
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Mory DB, Gabbay MAL, Rocco ER, Kasamatsu T, Crispim F, Miranda WL, Dib SA. High frequency of vitamin D receptor gene polymorphism FokI in Brazilian Type 1 diabetes mellitus patients with clinical autoimmune thyroid disease. Diabetol Metab Syndr 2016; 8:29. [PMID: 27011770 PMCID: PMC4804530 DOI: 10.1186/s13098-016-0145-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 03/10/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Polymorphisms of vitamin D receptor (VDR) gene have been studied as genetic markers of type 1 diabetes mellitus (T1DM) and some studies have reported associations with autoimmune thyroid disease. The aim of this study was to evaluate the relationship between VDR FokI polymorphism (rs10735810), thyroid autoimmunity and thyroid dysfunction (TD) in Brazilian T1DM. METHODS One-hundred-eighty T1DM patients were evaluated for age, duration of diabetes (DDM), positivity to TPO Antibody (TPOA), GAD Antibody (GADA), IA2 Antibody (IA2A) and fasting serum C-peptide (FCP) according to diagnosis of TD. PCR-RFLP analyses were carried out for VDR polymorphism FokI. RESULTS TPOA positivity (80.0 vs. 25.0 %, p < 0.001) and GADA positivity (56.0 vs. 30.3 %, p = 0.01) were higher in T1DM patients with TD with the same age and DDM than the group without TD, with no difference of FCP and IA2A positivity. We observed higher prevalence of VDR FokI in T1DM with TD (ff and Ff 73.9 % with TD vs. 52.7 % without TD, p = 0.05). Positivity to TPOA and presence of FokI polymorphism were significantly associated with the concurrence of TD in T1DM patients (OR 18.1; CI 3.7-87.0; p < 0.001). CONCLUSIONS The VDR FokI polymorphism (rs10735810) was associated to persistence of GADA, TPOA positivity and TD in Brazilian T1DM. Positivity to TPOA and VDR polymorphism FokI were strongly associated with concurrence of T1D and TD. These data collaborate to understanding the joint susceptibility genes for TD in T1DM.
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Affiliation(s)
- Denise Barreto Mory
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
| | - Monica Andrade Lima Gabbay
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
| | - Eloá R. Rocco
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
| | - Teresa Kasamatsu
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
| | - Felipe Crispim
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
| | - Walquíria Lopes Miranda
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
| | - Sérgio Atala Dib
- Endocrinology Division, São Paulo Federal University, Rua Botucatu, 740-Vila Clementino, São Paulo, SP CEP 04034-970 Brazil
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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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Bougacha-Elleuch N, Charfi N, Kharrat N, Ayadi F, Maalej A, Chabchoub G, Rebai A, Kammoun-Krichen M, Belguith-Maalej S, Abid M, Mnif M, Ayadi H. A 20 year history of clinical and genetic study of thyroid autoimmunity in a Tunisian multigenerational family: Evidence for gene interaction. Meta Gene 2015; 2:63-71. [PMID: 25606390 PMCID: PMC4287800 DOI: 10.1016/j.mgene.2013.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 11/20/2013] [Accepted: 11/20/2013] [Indexed: 11/15/2022] Open
Abstract
Autoimmune thyroid diseases (AITD), which include Hashimoto thyroiditis (HT), Graves' disease (GD) and primary idiopathic myxoedema (PIM), are recognized by their clinical and genetic heterogeneity. In this study, we have carried on a global approach gathering 20 year genetic and clinical data on a Tunisian multigenerational family (Akr). Our purpose was search for a combined genotype involved in AITD susceptibility using 33 gene polymorphisms. The Akr pedigree is composed of more than 400 members distributed on 10 generations. Clinical follow-up was performed by appreciation of the thyroid gland and measurement of both thyroid hormone and auto antibody levels. We used FBAT software to test for association between gene polymorphisms and AITDs. Clinical follow-up has showed that the number of AITD patients has increased from 25 to 78 subjects subdivided on 51 cases of GD, 22 PIM and 5 HT. Concerning genetic analysis, our study has revealed new gene association when compared with our previous analysis (considering single genes). Thus, PTPN22, TG and VDR gene polymorphisms have became associated with p-values ranging from 4.6 10− 2 to 4 10− 3 when considered with other genes on the same chromosome; giving evidence for gene interaction. The most significant association was found with the MHC region (p = 7.15 10− 4). Moreover, and among gene polymorphisms explored, our analysis has identified some of them as AITD biomarkers. Indeed, PDS gene polymorphisms were associated with either exophthalmia or goiter (p-values from 10− 2 to 10− 3). In conclusion, our study gives evidence for gene interaction in AITD development confirming genetic complexity of these diseases.
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Affiliation(s)
| | - Nadia Charfi
- Service Endocrinologie, CHU Hédi Chaker, Sfax, Tunisia
| | - Najla Kharrat
- Equipe de bioinformatique, Centre de Biotechnologie, Sfax, Tunisia
| | - Fatma Ayadi
- Service de Biochimie, CHU Habib Bourguiba, Sfax, Tunisia
| | - Abdellatif Maalej
- Laboratoire de Génétique Moléculaire Humaine, Faculté de Médecine de Sfax, Tunisia
| | - Ghazi Chabchoub
- Laboratoire de Génétique Moléculaire Humaine, Faculté de Médecine de Sfax, Tunisia
| | - Ahmed Rebai
- Equipe de bioinformatique, Centre de Biotechnologie, Sfax, Tunisia
| | - Maha Kammoun-Krichen
- Unité Cibles pour le Diagnostic et la Thérapie, Centre de Biotechnologie, Sfax, Tunisia
| | | | - Mohamed Abid
- Service Endocrinologie, CHU Hédi Chaker, Sfax, Tunisia
| | - Mouna Mnif
- Service Endocrinologie, CHU Hédi Chaker, Sfax, Tunisia
| | - Hammadi Ayadi
- Unité Cibles pour le Diagnostic et la Thérapie, Centre de Biotechnologie, Sfax, Tunisia
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Krysiak R, Kowalska B, Okopien B. Serum 25-Hydroxyvitamin D and Parathyroid Hormone Levels in Non-Lactating Women with Post-Partum Thyroiditis: The Effect of L-Thyroxine Treatment. Basic Clin Pharmacol Toxicol 2014; 116:503-7. [PMID: 25395280 DOI: 10.1111/bcpt.12349] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/06/2014] [Indexed: 12/13/2022]
Abstract
Vitamin D deficiency seems to be implicated in the onset and progression of some autoimmune disorders. No previous study has investigated vitamin D homeostasis in post-partum thyroiditis. We compared 25-hydroxyvitamin D and parathyroid hormone (PTH) levels between four groups of non-lactating women who gave birth within 12 months before the beginning of the study: hypothyroid women with post-partum thyroiditis (group A; n = 14), euthyroid females with post-partum thyroiditis (group B; n = 14), women with non-autoimmune hypothyroidism (group C; n = 16) and healthy euthyroid females without thyroid autoimmunity (group D; n = 15). In the second part of the study, groups A and C were treated for 6 months with L-thyroxine. Serum levels of 25-hydroxyvitamin D were lower, while PTH higher in patients with post-partum thyroiditis than in patients without thyroid autoimmunity. They were also lower (25-hydroxyvitamin D) or higher (PTH) in group A than in group B, as well as in group C in comparison with group D. L-thyroxine treatment increased 25-hydroxyvitamin D and reduced PTH levels only in hypothyroid women with post-partum thyroiditis. Baseline levels of 25-hydroxyvitamin D correlated with thyroid antibody titres, thyroid function and circulating PTH levels, while the effect of L-thyroxine on serum levels of this vitamin correlated with the changes in thyroid antibody titres and PTH levels. The results of our study suggest the association of vitamin D status with post-partum thyroiditis and L-thyroxine treatment of this disorder.
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Affiliation(s)
- Robert Krysiak
- Department of Internal Medicine and Clinical Pharmacology, Medical University of Silesia, Katowice, Poland
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12
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D'Aurizio F, Villalta D, Metus P, Doretto P, Tozzoli R. Is vitamin D a player or not in the pathophysiology of autoimmune thyroid diseases? Autoimmun Rev 2014; 14:363-9. [PMID: 25308530 DOI: 10.1016/j.autrev.2014.10.008] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 09/22/2014] [Indexed: 01/12/2023]
Abstract
1,25-Dihydroxyvitamin D is a steroid hormone derived from vitamin D, playing an important role in maintaining an adequate serum level of calcium and phosphorus. It is now clear that vitamin D exerts an endocrine action on the cells of the immune system, generating anti-inflammatory and immunoregulatory effects. The mechanisms underlying the role of vitamin D in autoimmunity are not completely understood. Lower vitamin D levels have been found in several autoimmune diseases, such as rheumatoid arthritis, systemic lupus erythematosus, systemic sclerosis, type 1 diabetes mellitus, multiple sclerosis, inflammatory bowel diseases, autoimmune thyroid diseases (i.e. Hashimoto's thyroiditis and Graves' disease) and autoimmune gastritis. Several genetic studies have demonstrated an association between thyroid autoimmunity susceptibility and gene polymorphisms of vitamin D receptor, vitamin D binding protein, 1-alpha-hydroxylase and 25-hydroxylase. Of note, some papers do not confirm this connection. With regard to the role of vitamin D in autoimmune thyroid diseases, available data remain controversial. Only few reports have analyzed the supposed association between autoimmune thyroid diseases and vitamin D concentration with inconclusive results. In our experience, low serum levels of vitamin D do not correlate either with Hashimoto's thyroiditis or with Graves' disease. The inability to achieve an unambiguous conclusion is in part due to the limitations in study design. In fact, most of the studies are cross-sectional surveys with a small number of subjects. In addition, the heterogeneity of the study population, seasonal variation of blood sampling, inter-method analytical variability of vitamin D assays and different definitions of vitamin D deficiency/insufficiency contribute to contradicting results. Therefore, further randomized, controlled, prospective trials are needed in order to demonstrate the causality of vitD in AITD and consequently the role of vitamin D supplementation in prevention or improvement of AITD, providing also information on the best formulation, dose and timing of supplementation.
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Affiliation(s)
- Federica D'Aurizio
- Clinical Pathology Laboratory, Department of Laboratory Medicine, S. Maria degli Angeli Hospital, Pordenone, Italy
| | - Danilo Villalta
- Allergology and Immunology, Department of Laboratory Medicine, S. Maria degli Angeli Hospital, Pordenone, Italy
| | - Paolo Metus
- Clinical Pathology Laboratory, Department of Laboratory Medicine, S. Maria degli Angeli Hospital, Pordenone, Italy
| | - Paolo Doretto
- Clinical Pathology Laboratory, Department of Laboratory Medicine, S. Maria degli Angeli Hospital, Pordenone, Italy
| | - Renato Tozzoli
- Clinical Pathology Laboratory, Department of Laboratory Medicine, S. Maria degli Angeli Hospital, Pordenone, Italy.
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Bozkurt NC, Karbek B, Ucan B, Sahin M, Cakal E, Ozbek M, Delibasi T. The association between severity of vitamin D deficiency and Hashimoto's thyroiditis. Endocr Pract 2014; 19:479-84. [PMID: 23337162 DOI: 10.4158/ep12376.or] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The relation between vitamin D and autoimmune disorders has long been investigated regarding the important roles of this hormone in immune regulation. We evaluated 25-hydroxyvitamin D (25OHD) status in subjects with Hashimoto's thyroiditis (HT) and healthy controls. METHODS Group-1 included 180 euthyroid patients (123 females/57 males) with HT who were on a stable dose of L-thyroxine (LT). A total of 180 sex-, age-, and body mass index (BMI)-matched euthyroid subjects with newly diagnosed HT were considered as Group-2, and 180 healthy volunteers were enrolled as controls (Group-3). All 540 subjects underwent thyroid ultrasound and were evaluated for serum 25OHD, anti-thyroid peroxidase (anti-TPO), and anti-thyroglobulin (anti-TG) levels. RESULTS Group-1 had the lowest 25OHD levels (11.4 ± 5.2 ng/mL) compared to newly diagnosed HT subjects (Group-2) (13.1 ± 5.9 ng/mL, P = .002) and to control subjects (15.4 ± 6.8 ng/mL, P<.001). Serum 25OHD levels directly correlated with thyroid volume (r = 0.145, P<.001) and inversely correlated with anti-TPO (r = -0.361, P<.001) and anti-TG levels (r = -0.335, P<.001). We determined that 48.3% of Group-1, 35% of Group-2, and 20.5% of controls had severe 25OHD deficiency (<10 ng/mL). Female chronic HT patients had the lowest serum 25OHD levels (10.3 ± 4.58 ng/mL), and male control subjects had the highest (19.3 ± 5.9 ng/mL, P<.001). CONCLUSIONS We demonstrated that serum 25OHD levels of HT patients were significantly lower than controls, and 25OHD deficiency severity correlated with duration of HT, thyroid volume, and antibody levels. These findings may suggest a potential role of 25OHD in development of HT and/or its progression to hypothyroidism.
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Affiliation(s)
- Nujen Colak Bozkurt
- Department of Endocrinology and Metabolism, Diskapi Yildirim Beyazit Training and Research Hospital, Ankara, Turkey.
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de Azevêdo Silva J, Monteiro Fernandes K, Trés Pancotto JA, Sotero Fragoso T, Donadi EA, Crovella S, Sandrin-Garcia P. Vitamin D receptor (VDR) gene polymorphisms and susceptibility to systemic lupus erythematosus clinical manifestations. Lupus 2013; 22:1110-7. [PMID: 23945129 DOI: 10.1177/0961203313500549] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disorder with heterogeneous clinical manifestations and target tissue damage. Currently, several genes have been associated with SLE susceptibility, including vitamin D receptor (VDR), which is a mediator of immune responses through the action of vitamin D. Polymorphisms in the VDR gene can impair the vitamin D (D3) function role, and since SLE patients show deficient D3 blood levels, it leads to a possible connection to the disease's onset. In our study we searched for an association between VDR polymorphisms and risk of developing SLE, as well as the disease's clinical manifestations. We enrolled 158 SLE patients and 190 Southeast Brazilian healthy controls, genotyped for five Tag single nucleotide polymorphisms (SNPs), covering most of the VDR gene region. We found an association between VDR SNPs and SLE for the following clinical manifestations: rs11168268 and cutaneous alterations (p=0.036), rs3890733 (p=0.003) rs3890733 and arthritis (p=0.001), rs2248098 and immunological alterations (p=0.040), rs4760648 and antibody anti-dsDNA (p=0.036). No association was reported between VDR polymorphisms and SLE susceptibility.
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Clinckspoor I, Verlinden L, Mathieu C, Bouillon R, Verstuyf A, Decallonne B. Vitamin D in thyroid tumorigenesis and development. ACTA ACUST UNITED AC 2013; 48:65-98. [PMID: 23890557 DOI: 10.1016/j.proghi.2013.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Besides its classical role in bone and calcium homeostasis, 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), the active form of vitamin D, has many non-classical effects; antiproliferative, anti-apoptotic and prodifferentiating effects of 1,25(OH)2D3 have been described in several tumour types in preclinical models. This review focuses on the insights gained in the elucidation of the role of 1,25(OH)2D3 in the normal thyroid and in the pathogenesis, progression and treatment of thyroid cancer, the most common endocrine malignancy. An increasing amount of observations points towards a role for impaired 1,25(OH)2D3-VDR signalling in the occurrence and progression of thyroid cancer, and a potential for structural analogues in the multimodal treatment of dedifferentiated iodine-resistant thyroid cancer. A role for vitamin D in thyroid-related autoimmunity is less convincing and needs further study. Altered 1,25(OH)2D3-VDR signalling does not influence normal thyroid development nor thyrocyte function, but does affect C-cell function, at least in rodents. If these findings also apply to humans deserves further study.
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Affiliation(s)
- Isabelle Clinckspoor
- Laboratory of Clinical and Experimental Endocrinology, KU Leuven, Bus 902, Herestraat 49, 3000 Leuven, Belgium
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Feng M, Li H, Chen SF, Li WF, Zhang FB. Polymorphisms in the vitamin D receptor gene and risk of autoimmune thyroid diseases: a meta-analysis. Endocrine 2013; 43:318-26. [PMID: 23065592 DOI: 10.1007/s12020-012-9812-y] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Accepted: 09/27/2012] [Indexed: 12/23/2022]
Abstract
Environmental and genetic factors are thought to be involved in the pathogenesis of autoimmune thyroid diseases (AITD), which include Graves' disease, Hashimoto's thyroiditis. Polymorphisms of vitamin D receptor (VDR) were implicated in AITDs risk. To date, many studies have evaluated the association between a functional polymorphism in the VDR gene and AITDs risk; however, the result is still ambiguous and inconclusive. To address the association of VDR gene FokI (rs10735810), TaqI (rs731236), BsmI (rs1544410), and ApaI (rs7975232) polymorphisms with AITD risk by meta-analysis. By searching the relevant literature, a total of eight studies were identified and meta-analyzed. HWE for each study are checked. Crude odds ratios (OR) with 95 % confidence intervals (CIs) were used to assess the strength of association in the allele polymorphism, codominant model, dominant model, and recessive model. The result indicates that the BsmI or TaqI polymorphisms is significantly associated with AITD risk (OR = 0.801 95 % CI 0.705, 0.910, Pz = 0.001 for B vs. b; OR = 0.854, 95 % CI 0.757, 0.963, Pz = 0.010 for t vs. T), while the ApaI or FokI polymorphism do not. In the subgroup analysis in Europeans, the decreased risk of AITD remained for the B or t variant. This gene-based analysis indicates that, based on current evidence from published studies, the cumulative effect of BsmI or TaqI polymorphisms in VDR is significantly associated with AITD.
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Affiliation(s)
- Ming Feng
- Department of Gerontology and Endocrinology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Clinckspoor I, Gérard AC, Van Sande J, Many MC, Verlinden L, Bouillon R, Carmeliet G, Mathieu C, Verstuyf A, Decallonne B. The vitamin d receptor in thyroid development and function. Eur Thyroid J 2012; 1:168-75. [PMID: 24783016 PMCID: PMC3821476 DOI: 10.1159/000342363] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 08/02/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Vitamin D is known to modulate thyroid neoplastic and autoimmune disease. We investigated the role of the vitamin D receptor (VDR) in normal thyroid development and function (thyrocytes and C cells). METHODS The thyroid phenotype of VDR knockout mice was studied in comparison to wild-type controls. The mice were fed a normal diet or a calcium-rich diet to circumvent effects induced by hypocalcemia. RESULTS Thyroid morphology was unaltered in VDR knockout mice. Also, expression of different parameters of thyrocyte function was comparable (immunohistochemistry). C cell physiology was, however, affected in the absence of the VDR, resulting in increased thyroidal calcitonin expression (immunohistochemistry), paralleled by increased serum calcitonin levels, but only in normocalcemic mice. To study a possible effect of vitamin D status on basal calcitonin levels in humans, serum calcitonin concentrations were compared between vitamin D-deficient and -sufficient patients (serum 25-OH vitamin D3 ≤10 and ≥40 ng/ml, respectively), but no difference was observed. CONCLUSIONS In mice, the VDR is redundant for normal thyrocyte function, but not for C cell function, where it mediates the negative control of calcitonin by 1,25-dihydroxyvitamin D3. In patients, vitamin D status does not affect basal serum calcitonin levels. A study in healthy individuals is needed to confirm these findings.
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Affiliation(s)
- Isabelle Clinckspoor
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Anne-Catherine Gérard
- Pôle de Morphologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Leuven, Belgium
| | | | - Marie-Christine Many
- Pôle de Morphologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Leuven, Belgium
| | - Lieve Verlinden
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Roger Bouillon
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Geert Carmeliet
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Chantal Mathieu
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
| | - Annemieke Verstuyf
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Brigitte Decallonne
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
- *B. Decallonne, University Hospitals Leuven, Departement of Endocrinology, Herestraat 49, BE–3000 Leuven (Belgium), Tel. +32 16 34 6994, E-Mail
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Abd El Gawad SS, Abdul Samee ER, Metwali AA, Abd El Gawad MS. Vitamin D receptor gene polymorphism and its association with 1,25-dihydroxyvitamin D₃ in patients with Graves disease in an Egyptian population: a pilot study. Endocr Pract 2012; 18:132-9. [PMID: 21803714 DOI: 10.4158/ep11131.or] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To study the association of vitamin D receptor (VDR) gene polymorphisms (BsmI, ApaI, and TaqI) with susceptibility to Graves disease (GD) in Egyptian patients and their correlation with serum levels of 1,25-dihydroxyvitamin D₃ [1,25(OH)2D3]. METHODS The current study consisted of 90 patients with GD (65 women and 25 men), with ages ranging from 25 to 55 years. A control group of 55 healthy euthyroid subjects (40 women and 15 men) with matched ages were included in the study. Genotyping was performed by restriction fragment length polymorphism analysis. Serum levels of 1,25(OH)2D3 were measured with use of radioimmunoassay in the patients and the control subjects. RESULTS The distribution of genotype frequencies differed significantly between patients with GD and control subjects (BsmI: χ² = 10.627, P = .004; ApaI: χ² = 12.581, P = .001; TaqI: χ² = 9.591, P = .008). We found overexpression of the VDR BsmI "bb" (odds ratio, 2.360; 95% confidence interval [CI], 1.11 to 4.996), ApaI "aa" (odds ratio, 2.785; 95% CI, 1.116 to 6.933), and TaqI "TT" (odds ratio, 3.047; 95% CI, 1.478 to 6.283) genotypes in patients with GD in comparison with control subjects. In contrast, no correlation was observed with respect to the 1,25(OH)2D3 levels with BsmI, ApaI, and TaqI genotypes (P>.05) on the analysis of variance test. CONCLUSION These data suggested that BsmI, ApaI, and TaqI polymorphisms in the VDR gene were associated with susceptibility to GD, whereas BsmI, ApaI, and TaqI polymorphisms were not associated with serum levels of 1,25(OH)2D3.
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Bianco B, Verreschi ITN, Oliveira KC, Guedes AD, Barbosa CP, Lipay MVN. Analysis of vitamin D receptor gene (VDR) polymorphisms in Turner syndrome patients. Gynecol Endocrinol 2012; 28:326-9. [PMID: 22117179 DOI: 10.3109/09513590.2011.631630] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Individuals with Turner syndrome (TS) have increased risk for autoimmune diseases, especially thyroid abnormalities. The function of the vitamin D receptor (VDR) gene is influenced by several genetic polymorphisms which are associated with a susceptibility to a range of autoimmune diseases. Thus, we have hypothesized a possible relationship between thyroid abnormalities and VDR polymorphisms (ApaI/G1025-49T, TaqI/T1056C, FokI/T2C and BsmI G1024 + 283A) in TS patients. A case-control study was performed comprising 101 Brazilian women with TS and a control group consisting of 133 healthy fertile women without a history of autoimmune diseases. In TS group, 21.8% had Hashimoto's thyroiditis. Detection of VDR polymorphisms was performed using TaqMan system by real-time PCR. The χ(2) was used to compare allele and genotype frequencies between groups. Combined genotypes of VDR gene polymorphisms were assessed by the haplotype analysis. A p value <0.05 was considered statistically significant. Relatively similar VDR polymorphisms genotype and allelic frequencies in cases and controls were found, even when only considering the patients with thyroid abnormalities. Haplotype analysis showed that none of the VDR haplotypes were associated to thyroid diseases in TS patients. In conclusion, the results showed no association between VDR gene polymorphisms and thyroid abnormalities in Brazilian TS patients tested.
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Affiliation(s)
- Bianca Bianco
- Division of Endocrinology, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil.
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Karray EF, Ben Dhifallah I, Ben Abdelghani K, Ben Ghorbel I, Khanfir M, Houman H, Hamzaoui K, Zakraoui L. Associations of vitamin D receptor gene polymorphisms FokI and BsmI with susceptibility to rheumatoid arthritis and Behçet's disease in Tunisians. Joint Bone Spine 2011; 79:144-8. [PMID: 21820934 DOI: 10.1016/j.jbspin.2011.06.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2011] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Reports of immunomodulating effects of vitamin D suggest a need for examining allele and genotype frequencies of the vitamin D nuclear receptor gene (VDR) in patients with autoimmune diseases. T-helper-1 (Th1) counts in peripheral blood are increased in both rheumatoid arthritis (RA) and Behçet's disease (BD). We studied VDR polymorphisms in patients with these two diseases in Tunisia. METHODS In 108 patients with RA, 131 patients with BD, and 152 controls, we studied FokI and BsmI VDR polymorphisms, using the restriction fragment length polymorphism technique. RESULTS The FokI polymorphism alleles and genotype were significantly more common in the RA group than in the controls (P=0.001 and P=0.005, respectively). The FokI F allele and F/F genotype were significantly associated with BD (P=0.0003 and P=0.002, respectively). Furthermore, in the group with BD, the FokI polymorphism was significantly associated with the presence of vascular manifestations (P=0.006). In patients with RA, the FokI polymorphism was significantly associated with female gender (P=0.003). No significant associations were found between the Bsm1 polymorphism and RA or BD. CONCLUSION The VDR F allele is associated with RA and BD in Tunisians.
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Affiliation(s)
- Emna Fakhfakh Karray
- School of Medicine, Tunis El Manar University, Homeostasis and Cell Dysfunction Unit Research 99/UR/08-40, Tunis, Tunisia.
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Jesus AA, Liphaus BL, Silva CA, Bando SY, Andrade LEC, Coutinho A, Carneiro-Sampaio M. Complement and antibody primary immunodeficiency in juvenile systemic lupus erythematosus patients. Lupus 2011; 20:1275-84. [PMID: 21813590 DOI: 10.1177/0961203311411598] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To evaluate the frequency of primary immunodeficiencies (PID) in juvenile systemic lupus erythematosus (JSLE) patients. METHODS Some 72 JSLE patients were analyzed for levels of immunoglobulin classes and IgG subclasses and early components of the classical complement pathway. Determination of C4 gene copy number (GCN) and detection of type I C2 deficiency (D) were also performed. RESULTS PID was identified in 16 patients (22%): C2D in three, C4D in three, C1qD in two, IgG2D (<20 mg/dl) in four, IgAD (<7 mg/dl) in three, and IgMD (<35 mg/dl) in three; one of these patients presented IgA, C2 and C4D. Two patients had low C4 GCN and two had type I C2D. Demographic data, family history of autoimmune disease and PID, JSLE clinical findings, occurrence of infections, disease activity and therapies were similar in patients with and without PID (p > 0.05). Remarkably, the median of Systemic Lupus International Collaborating Clinics/ACR-damage index (SLICC/ACR-DI) was significantly higher in JSLE patients with PID compared with patients without these abnormalities (p = 0.0033), likewise the high frequency of SLICC/ACR-DI > 1 (p = 0.023). CONCLUSIONS A high frequency of PID was observed in JSLE patients, suggesting that these defects may contribute to lupus development. Our findings indicate that these two groups of PID should be investigated in severe pediatric lupus.
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Affiliation(s)
- A A Jesus
- Children's Hospital, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Deng H, Liu F, Pan Y, Jin X, Wang H, Cao J. BsmI, TaqI, ApaI, and FokI polymorphisms in the vitamin D receptor gene and periodontitis: a meta-analysis of 15 studies including 1338 cases and 1302 controls. J Clin Periodontol 2010; 38:199-207. [PMID: 21198767 DOI: 10.1111/j.1600-051x.2010.01685.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
AIM A meta-analysis was conducted in order to investigate the potential association of vitamin D receptor (VDR) gene polymorphisms with susceptibility to aggressive and chronic periodontal disease. MATERIAL AND METHODS A database search yielded a total of 15 studies involving 1338 cases and 1302 controls. Four polymorphisms were included in the meta-analysis: VDR TaqI (rs731236), VDR BsmI (rs1544410), VDR FokI (rs2228570), and VDR ApaI (rs7975232). Odds ratios (ORs) along with their 95% confidence intervals (CIs) were computed to compare the distribution of alleles and genotypes between cases and controls. RESULTS AND CONCLUSIONS The combined results based on all studies showed that (1) chronic periodontitis cases had a significantly lower frequency of bb genotype of BsmI [OR=0.63, 95% CI=0.42, 0.94; p=0.02] in Asians; (2) chronic periodontitis cases had a significantly higher frequency of AA genotype of ApaI (OR=2.20, 95% CI=1.39, 3.48; p<0.001) in Asians; (3) chronic periodontitis cases had a weak significantly higher frequency of TT genotype of TaqI (OR=1.86, 95% CI=1.002, 3.46; p=0.049) in Asians. After Bonferroni's correction, we found that in Asians chronic periodontitis cases still had a significantly higher frequency of AA genotype of ApaI. No significant difference was found in any genotype of FokI. No association was found for all the VDR gene polymorphisms examined as far as the aggressive form of the disease is concerned. Future studies need to focus on the possible biological consequences and mechanisms of the VDR genetic variants. The current findings confirm that VDR gene is a candidate gene for periodontitis.
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Affiliation(s)
- Hui Deng
- Department of Periodontology, The Affiliated Hospital of Stomatology, Wenzhou Medical College, Wenzhou, Zhejiang, China.
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Sharma V, Fretwell D, Crees Z, Kerege A, Klopper JP. Thyroid cancer resistance to vitamin D receptor activation is associated with 24-hydroxylase levels but not the ff FokI polymorphism. Thyroid 2010; 20:1103-11. [PMID: 20860424 PMCID: PMC2958447 DOI: 10.1089/thy.2010.0096] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND The vitamin D receptor (VDR) has been studied as a novel target for cancer therapy in many tissue types as VDR ligands decrease cell proliferation in vitro and decrease tumor growth in vivo in sensitive cells. The objective of this study was to analyze the response to VDR agonist therapy in a panel of validated thyroid cancer cells and assess genetic markers predicting sensitivity and resistance to calcitriol and the noncalcemic analog DP006. METHODS Thyroid cancer cell lines were analyzed for VDR and RXR protein by Western blot. Cell growth after VDR agonist treatment (calcitriol or DP006) was assessed after 6 days of treatment by viable cell assay. To investigate calcitriol/DP006 resistance in VDR-expressing cells, the VDR was sequenced and 1-α and 24-hydroxylase mRNA expression was assessed. RESULTS VDR protein was variably expressed in the thyroid cancer cell lines and its presence was not sufficient for decreased viable cell count in response to calcitriol or DP006. The most sensitive cells (TPC1) have an ff FokI VDR polymorphism and the most resistant cells (HTh7 and 8505C) have an FF FokI VDR. This is a unique finding given that the balance of the literature of VDR polymorphisms describes an association of the ff FokI polymorphism with cancer risk and/or decreased VDR transactivation. 1-α and 24-hydroxylase mRNA expression before and after VDR agonist therapy was examined. 1-α-Hydroxylase levels did not change after calcitriol treatment. However, we found that higher baseline 24-hydroxylase levels and/or lower stimulation of 24-hydroxylase levels after calcitriol treatment were associated with relative resistance to calcitriol/DP006. CONCLUSIONS The VDR represents a novel therapeutic target in poorly differentiated thyroid cancer; however, the efficacy of VDR agonist therapy to decrease viable thyroid cancer cell count cannot be predicted solely on the presence of the VDR. The FF FokI VDR genotype and high baseline 24-hydroxylase levels were associated with relative resistance to calcitriol and DP006. Therefore, identifiable markers of sensitivity or resistance to VDR agonist therapy may allow for a personalized use of these agents in poorly differentiated thyroid cancer.
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Affiliation(s)
- Vibha Sharma
- Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Deborah Fretwell
- Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Zachary Crees
- Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Anna Kerege
- Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Joshua P. Klopper
- Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
- University of Colorado Cancer Center, University of Colorado School of Medicine, Aurora, Colorado
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Genetic polymorphisms in the EGFR (R521K) and estrogen receptor (T594T) genes, EGFR and ErbB-2 protein expression, and breast cancer risk in Tunisia. J Biomed Biotechnol 2009; 2009:753683. [PMID: 19636371 PMCID: PMC2711625 DOI: 10.1155/2009/753683] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Revised: 04/17/2009] [Accepted: 05/21/2009] [Indexed: 11/29/2022] Open
Abstract
We evaluated the association of epidermal growth factor receptor (EGFR) 142285G>A (R521K) and estrogen receptor alpha (ESR1) 2014G>A (T594T) single nucleotide polymorphisms with breast cancer risk and prognosis in Tunisian patients. EGFR 142285G>A and ESR1 2014G>A were genotyped in a sample of 148 Tunisian breast cancer patients and 303 controls using PCR-RFLP method. Immunohistochemitsry was used to evaluate the expression levels of EGFR, HER2, ESR1, progesterone receptor and BCL2 in tumors. We found no evidence for an association between EGFR R521K polymorphism and breast cancer risk. However, we found that the homozygous GG (Arg) genotype was more prevalent in patients with lymph node metastasis (P = .03) and high grade tumors (P = .011). The ESR1 2014G allele showed significant association with breast cancer risk (P = .025). The GG genotype was associated with HER2 overexpression and this association withstood univariate and multivariate analyses (P = .009; P = .021, resp.). These data suggest that the R521K might be a prognostic factor, because it correlates with both tumor grade and nodule status. The higher expression of HER2 in ESR1 T594T GG patients suggests the possibility that ESR1 gene polymorphisms accompanied by HER2 expression might influence the pathogenesis of breast cancers.
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Misharin A, Hewison M, Chen CR, Lagishetty V, Aliesky HA, Mizutori Y, Rapoport B, McLachlan SM. Vitamin D deficiency modulates Graves' hyperthyroidism induced in BALB/c mice by thyrotropin receptor immunization. Endocrinology 2009; 150:1051-60. [PMID: 18927213 PMCID: PMC2646531 DOI: 10.1210/en.2008-1191] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
TSH receptor (TSHR) antibodies and hyperthyroidism are induced by immunizing mice with adenovirus encoding the TSHR or its A-subunit. Depleting regulatory T cells (Treg) exacerbates thyrotoxicosis in susceptible BALB/c mice and induces hyperthyroidism in normally resistant C57BL/6 mice. Vitamin D plays an important role in immunity; high dietary vitamin D intake suppresses (and low intake enhances) adaptive immune responses. Vitamin D-induced immunosuppression may enhance Treg. Therefore, we hypothesized that decreased vitamin D intake would mimic Treg depletion and enhance hyperthyroidism induced by A-subunit adenovirus immunization. BALB/c mice had a reduced ability vs. C57BL/6 mice to generate the active metabolite of vitamin D (1,25-dihydroxyvitamin D3). Vitamin D deficiency induced subtle immune changes in BALB/c (not C57BL/6) mice. Compared with mice fed regular chow, vitamin D-deprived BALB/c mice had fewer splenic B cells and decreased interferon-gamma responses to mitogen and lacked memory T-cell responses to A-subunit protein. However, vitamin D deficiency did not alter TSHR antibody responses measured by ELISA, TSH binding inhibition, or cAMP generation from TSHR-expressing cells. Unexpectedly, compared with vitamin D-sufficient mice, vitamin D-deficient BALB/c mice had lower preimmunization T(4) levels and developed persistent hyperthyroidism. This difference was unrelated to the immunological changes between vitamin D-deficient or -sufficient animals. Previously, we found that different chromosomes or loci confer susceptibility to TSHR antibody induction vs. thyroid function. Our present studies provide evidence that an environmental factor, vitamin D, has only minor effects on induced immunity to the TSHR but directly affects thyroid function in mice.
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Affiliation(s)
- Alexander Misharin
- Autoimmune Disease Unit, Cedars-Sinai Research Institute and University of California Los Angeles, UCLA School of Medicine, Los Angeles, CA 90095, USA
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