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Hernández M, Nóvoa-Medina Y, Faner R, Palou E, Esquerda A, Castelblanco E, Wägner AM, Mauricio D. Genetics: Is LADA just late onset type 1 diabetes? Front Endocrinol (Lausanne) 2022; 13:916698. [PMID: 36034444 PMCID: PMC9404871 DOI: 10.3389/fendo.2022.916698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND There is a controversy regarding Latent Autoimmune Diabetes in Adults (LADA) classification and whether it should be considered a slowly progressing form of type 1 (T1) diabetes (DM) or a distinct type of DM altogether. METHODS This cross-sectional study assessed major genes associated with T1DM (class II HLA, PTPN22 [rs2476601] and INS [rs689]) in patients with LADA, as compared with participants with T1DM (stratified according to age of diagnosis before or after 30) and T2DM. HLA genotyping of the DRB1, DQA1 and DQB1 loci was performed by reverse PCR sequence-specific oligonucleotides. HLA haplotypes were assigned according to those most frequently described in the European population. INS and PTPN22 SNPs were genotyped by real-time PCR. RESULTS A total of 578 participants were included: 248 with T1DM (70 diagnosed after the age of 30), 256 with T2DM and 74 with LADA. High risk HLA alleles were significantly more frequent in LADA than in T2DM, whereas the opposite was true for protective alleles. We found a lower frequency of the high-risk DRB1*04-DQB1*03:02-DQA1*03:01 haplotype in LADA (21.1%) than in the overall T1DM (34.7%) (p<0.05), whereas no differences were found between these groups for DRB1*03-DQB1*02:01-DQA1*05:01 or for protective alleles. Only 12% the overall T1DM group had no risk alleles vs 30% of LADA (p<0.0005). However, HLA allele distribution was similar in LADA and T1DM diagnosed after the age of 30. A total of 506 individuals (195 with T1DM [21 diagnosed after age 30] 253 with T2DM and 58 with LADA) were genotyped for the PTPN22 and INS SNPs. The G/A genotype of the PTPN22 rs2476601 was more frequent and the T/T genotype of the INS SNP rs689 was less frequent in T1DM compared to LADA. We did not find any significant differences in the frequency of the mentioned SNPs between LADA and T2DM, or between LADA and T1DM diagnosed after the age of 30. CONCLUSION In this relatively small cross-sectional study, the genetic profile of subjects with LADA showed a similar T1DM-related risk allele distribution as in participants with T1DM diagnosed after the age of 30, but fewer risk alleles than those diagnosed before 30. Differences were present for HLA, as well as PTPN22 and INS genes.
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Affiliation(s)
- M. Hernández
- Department of Endocrinology and Nutrition, University Hospital Arnau de Vilanova, Lleida, Spain
- Lleida Biomedical Research Institute (IRB Lleida), University of Lleida (UdL), Lleida, Spain
| | - Y. Nóvoa-Medina
- Department of Pediatrics, Complejo Hospitalario Universitario Insular Materno-Infantil, Las Palmas de Gran Canaria, Spain
- Research Institute in Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain
| | - R. Faner
- Histocompatibility and Immunogenetics Laboratory, Blood and Tissue Bank, Barcelona, Spain
| | - E. Palou
- Histocompatibility and Immunogenetics Laboratory, Blood and Tissue Bank, Barcelona, Spain
| | - A. Esquerda
- Department of Laboratory Medicine, University Hospital Arnau de Vilanova, Lleida, Spain
| | - E. Castelblanco
- Diabetis en Atenció Primària - Catalunya (DAP-Cat) Group, Unitat de Suport a la Recerca Barcelona, Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina, Barcelona, Spain
- Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - A. M. Wägner
- Research Institute in Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain
- Department of Endocrinology and Nutrition, Complejo Hospitalario Universitario Insular Materno-Infantil, Las Palmas de Gran Canaria, Spain
- *Correspondence: A. M. Wägner, ; D. Mauricio,
| | - D. Mauricio
- Department of Endocrinology, Hospital de la Santa Creu i Sant Pau & Institut d’Investigació Biomèdica (IIB) Sant Pau, Barcelona, Spain
- Consorcio Centro de Investigación Biomédica en Red (CIBER) of Diabetes and Associated Metabolic Diseases, Instituto de Salud Carlos III, Barcelona, Spain
- Faculty of Medicine, University of Vic & Central University of Catalonia, Vic, Spain
- *Correspondence: A. M. Wägner, ; D. Mauricio,
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Winiarska-Mieczan A, Tomaszewska E, Jachimowicz K. Antioxidant, Anti-Inflammatory, and Immunomodulatory Properties of Tea-The Positive Impact of Tea Consumption on Patients with Autoimmune Diabetes. Nutrients 2021; 13:nu13113972. [PMID: 34836227 PMCID: PMC8625657 DOI: 10.3390/nu13113972] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/03/2021] [Accepted: 11/05/2021] [Indexed: 01/08/2023] Open
Abstract
The physiological markers of autoimmune diabetes include functional disorders of the antioxidative system as well as progressing inflammation and the presence of autoantibodies. Even though people with type 1 diabetes show genetic predispositions facilitating the onset of the disease, it is believed that dietary factors can stimulate the initiation and progression of the disease. This paper analyses the possibility of using tea as an element of diet therapy in the treatment of type 1 diabetes. Based on information available in literature covering the last 10 years, the impact of regular tea consumption or diet supplements containing tea polyphenols on the oxidative status as well as inflammatory and autoimmune response of the organism was analyzed. Studies conducted on laboratory animals, human patients, and in vitro revealed positive effects of the consumption of tea or polyphenols isolated therefrom on the diabetic body. Few reports available in the literature pertain to the impact of tea on organisms affected by type 1 diabetes as most (over 85%) have focused on cases of type 2 diabetes. It has been concluded that by introducing tea into the diet, it is possible to alleviate some of the consequences of oxidative stress and inflammation, thus limiting their destructive impact on the patients' organisms, consequently improving their quality of life, regardless of the type of diabetes. Furthermore, elimination of inflammation should reduce the incidence of immune response. One should consider more widespread promotion of tea consumption by individuals genetically predisposed to diabetes, especially considering the drink's low price, easy availability, overall benefits to human health, and above all, the fact that it can be safely used over extended periods of time, regardless of the patient's age.
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Affiliation(s)
- Anna Winiarska-Mieczan
- Institute of Animal Nutrition and Bromatology, University of Life Sciences in Lublin, Akademicka St. 13, 20-950 Lublin, Poland;
- Correspondence: (A.W.-M.); (E.T.); Tel.: +48-81-445-67-44 (A.W.-M.); +48-81-445-69-63 (E.T.)
| | - Ewa Tomaszewska
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950 Lublin, Poland
- Correspondence: (A.W.-M.); (E.T.); Tel.: +48-81-445-67-44 (A.W.-M.); +48-81-445-69-63 (E.T.)
| | - Karolina Jachimowicz
- Institute of Animal Nutrition and Bromatology, University of Life Sciences in Lublin, Akademicka St. 13, 20-950 Lublin, Poland;
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Critical Amino Acid Variants in HLA-DRB1 and -DQB1 Allotypes in the Development of Classical Type 1 Diabetes and Latent Autoimmune Diabetes in Adults in the Japanese Population. Curr Issues Mol Biol 2021; 43:107-115. [PMID: 34065159 PMCID: PMC8928954 DOI: 10.3390/cimb43010009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/04/2021] [Accepted: 05/07/2021] [Indexed: 12/11/2022] Open
Abstract
The effects of amino acid variants encoded by the human leukocyte antigen (HLA) class II on the development of classical type 1 diabetes (T1D) and latent autoimmune diabetes in adults (LADA) have not been fully elucidated. We retrospectively investigated the HLA-DRB1 and -DQB1 genes of 72 patients with classical T1D and 102 patients with LADA in the Japanese population and compared the frequencies of HLA-DRB1 and -DQB1 alleles between these patients and the Japanese populations previously reported by another institution. We also performed a blind association analysis with all amino acid positions in classical T1D and LADA, and compared the associations of HLA-DRB1 and -DQB1 amino acid positions in classical T1D and LADA. The frequency of DRß-Phe-13 was significantly higher and those of DRß-Arg-13 and DQß-Gly-70 were significantly lower in patients with classical T1D and LADA than in controls. The frequencies of DRß-His-13 and DQß-Glu-70 were significantly higher in classical T1D patients than in controls. The frequency of DRß-Ser-13 was significantly lower and that of DQß-Arg-70 was significantly higher in LADA patients than in controls. HLA-DRß1 position 13 and HLA-DQß1 position 70 could be critical amino acid positions in the development of classical T1D and LADA.
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Ramu D, Perumal V, Paul SFD. Association of common type 1 and type 2 diabetes gene variants with latent autoimmune diabetes in adults: A meta-analysis. J Diabetes 2019; 11:484-496. [PMID: 30456822 DOI: 10.1111/1753-0407.12879] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/09/2018] [Accepted: 11/13/2018] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND The aim of this meta-analysis was to determine the association of common type 1 diabetes (T1D) and type 2 diabetes (T2D) gene variants (protein tyrosine phosphatase non-receptor 22 [PTPN22] rs2476601C/T, insulin [INS] rs689A/T and transcription factor 7-like 2 [TCF7L2] rs7903146C/T) with latent autoimmune diabetes in adults (LADA). METHODS A systematic search of electronic databases was conducted up to 2017 and data from 16 independent case-control studies for three gene variants were pooled. The pooled allele and genotype frequencies for each T1D and T2D gene variant were used to calculate odds ratios (ORs) with 95% confidence intervals (CIs) to assess the strength of the association. Heterogeneity tests and evaluation of publication bias were performed for all studies. RESULTS In all, 8869 cases and 20 829 controls pooled from 16 case-control studies were included in the analysis. For rs2476601, a significant association was found for homozygote TT (OR 2.67; 95% CI 1.92-3.70; P < 0.0001), heterozygote CT (OR 1.61; 95% CI 1.44-1.79; P < 0.0001), and the T allele (OR 1.62; 95% CI 1.48-1.78; P < 0.0001). Overall, a significant inverse association was observed for rs689 in the TT genotype (OR 0.43; 95% CI 0.30-0.64; P < 0.0001), AT genotype (OR 0.53; 95% CI 0.45-0.62; P < 0.0001), and T allele (OR 0.61; 95% CI 0.52-0.71; P < 0.0001). For the rs7903146 polymorphism, the T allele (OR 1.19; 95% CI 1.00-1.40; P = 0.04) may be associated with the risk of LADA. CONCLUSION The rs2476601C/T, rs689A/T, and rs7903146C/T polymorphisms were found to be associated with the risk of LADA, thereby indicating that, genetically, LADA could be an admixture of both T1D and T2D.
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Affiliation(s)
- Deepika Ramu
- Department of Human Genetics, Sri Ramachandra Institute of Higher Education and Research, Chennai, India
| | | | - Solomon F D Paul
- Department of Human Genetics, Sri Ramachandra Institute of Higher Education and Research, Chennai, India
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Heneberg P, Kocková L, Čecháková M, Daňková P, Černá M. Autoimmunity-Associated PTPN22 Polymorphisms in Latent Autoimmune Diabetes of the Adult Differ from Those of Type 1 Diabetes Patients. Int Arch Allergy Immunol 2018; 177:57-68. [DOI: 10.1159/000489225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 04/11/2018] [Indexed: 12/16/2022] Open
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Welter M, Volanski W, Alberton D, França SN, Picheth G, de Moraes Rego FG. Polymorphism rs2476601 in the PTPN22 gene is associated with type 1 diabetes in children from the South Region of Brazil. Gene 2018; 650:15-18. [DOI: 10.1016/j.gene.2018.01.073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/20/2017] [Accepted: 01/22/2018] [Indexed: 01/21/2023]
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Noble JA. Immunogenetics of type 1 diabetes: A comprehensive review. J Autoimmun 2015; 64:101-12. [PMID: 26272854 DOI: 10.1016/j.jaut.2015.07.014] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 07/29/2015] [Indexed: 12/13/2022]
Abstract
Type 1 diabetes (T1D) results from the autoimmune destruction of insulin-producing beta cells in the pancreas. Prevention of T1D will require the ability to detect and modulate the autoimmune process before the clinical onset of disease. Genetic screening is a logical first step in identification of future patients to test prevention strategies. Susceptibility to T1D includes a strong genetic component, with the strongest risk attributable to genes that encode the classical Human Leukocyte Antigens (HLA). Other genetic loci, both immune and non-immune genes, contribute to T1D risk; however, the results of decades of small and large genetic linkage and association studies show clearly that the HLA genes confer the most disease risk and protection and can be used as part of a prediction strategy for T1D. Current predictive genetic models, based on HLA and other susceptibility loci, are effective in identifying the highest-risk individuals in populations of European descent. These models generally include screening for the HLA haplotypes "DR3" and "DR4." However, genetic variation among racial and ethnic groups reduces the predictive value of current models that are based on low resolution HLA genotyping. Not all DR3 and DR4 haplotypes are high T1D risk; some versions, rare in Europeans but high frequency in other populations, are even T1D protective. More information is needed to create predictive models for non-European populations. Comparative studies among different populations are needed to complete the knowledge base for the genetics of T1D risk to enable the eventual development of screening and intervention strategies applicable to all individuals, tailored to their individual genetic background. This review summarizes the current understanding of the genetic basis of T1D susceptibility, focusing on genes of the immune system, with particular emphasis on the HLA genes.
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Affiliation(s)
- Janelle A Noble
- Children's Hospital Oakland Research Institute, Oakland, CA 94609, USA.
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Kharroubi AT, Darwish HM. Diabetes mellitus: The epidemic of the century. World J Diabetes 2015; 6:850-67. [PMID: 26131326 PMCID: PMC4478580 DOI: 10.4239/wjd.v6.i6.850] [Citation(s) in RCA: 510] [Impact Index Per Article: 56.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 03/25/2015] [Accepted: 04/10/2015] [Indexed: 02/05/2023] Open
Abstract
The epidemic nature of diabetes mellitus in different regions is reviewed. The Middle East and North Africa region has the highest prevalence of diabetes in adults (10.9%) whereas, the Western Pacific region has the highest number of adults diagnosed with diabetes and has countries with the highest prevalence of diabetes (37.5%). Different classes of diabetes mellitus, type 1, type 2, gestational diabetes and other types of diabetes mellitus are compared in terms of diagnostic criteria, etiology and genetics. The molecular genetics of diabetes received extensive attention in recent years by many prominent investigators and research groups in the biomedical field. A large array of mutations and single nucleotide polymorphisms in genes that play a role in the various steps and pathways involved in glucose metabolism and the development, control and function of pancreatic cells at various levels are reviewed. The major advances in the molecular understanding of diabetes in relation to the different types of diabetes in comparison to the previous understanding in this field are briefly reviewed here. Despite the accumulation of extensive data at the molecular and cellular levels, the mechanism of diabetes development and complications are still not fully understood. Definitely, more extensive research is needed in this field that will eventually reflect on the ultimate objective to improve diagnoses, therapy and minimize the chance of chronic complications development.
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Miao CG, Qin D, Du CL, Ye H, Shi WJ, Xiong YY, Zhang XL, Yu H, Dou JF, Ma ST, Qin MS, Liu HZ, Fang YX, Zhou GL, Chen JZ, He X, Huang C, Huang Y, Zhang B, Song TW, Li J. DNMT1 activates the canonical Wnt signaling in rheumatoid arthritis model rats via a crucial functional crosstalk between miR-152 and the DNMT1, MeCP2. Int Immunopharmacol 2015; 28:344-53. [PMID: 26093272 DOI: 10.1016/j.intimp.2015.06.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 05/20/2015] [Accepted: 06/07/2015] [Indexed: 12/13/2022]
Abstract
In previous study, we identified that microRNA (miR)-152 expression was down-regulated in RA model rats, and overexpression of miR-152 inhibited the canonical Wnt signaling through the DNA methyltransferase (DNMT1) inhibition. However, the exact molecular mechanisms of DNMT1 were unclear. In this work, we investigate whether DNMT1 affects the pathogenesis of RA model rats and targets the miR-152 promoter. The effects of DNMT1 on the canonical Wnt signaling, the pathogenesis of RA model rats and the SFRP1 expression were detected by the real time qPCR, Western blotting, ELISA, MTT and viable cell number assay. The interaction between miR-152 and DNMT1, methyl CpG binding protein 2 (MeCP2) was investigated by real time qPCR and chromatin immunoprecipitation (ChIP). Our results revealed that increased DNMT1 activated the canonical Wnt signaling could not only by targeting SFRP4 may also by SFRP1 in RA model rats. Furthermore, treatment of DNMT1 inhibitor, 5-aza-2'-deoxycytidine (5-azadC), or knockdown of DNMT1, or knockdown of MeCP2 led to increased miR-152 expression by reversion of its promoter hypermethylation, DNMT1 and MeCP2 binding to the CpG islands of miR-152 promoter. Interestingly, it is proved a synergistic inhibition effect of DNMT1 and MeCP2 in this process. Moreover, overexpression of miR-152 could inhibit DNMT1 expression and result in a decrease of DNMT1 and MeCP2 binding to miR-152 promoter, and inhibition of miR-152 expression would reverse it. These observations demonstrate a crucial functional crosstalk between miR-152 and the DNMT1, MeCP2 by a double-negative circuit involved in the pathogenesis of RA model rats.
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Affiliation(s)
- Cheng-Gui Miao
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China; School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Dan Qin
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Chuan-Lai Du
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Hua Ye
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Wei-Jing Shi
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - You-Yi Xiong
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Xiao-Lin Zhang
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Hao Yu
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Jin-Feng Dou
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Shi-Tang Ma
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Mei-Song Qin
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Han-Zhen Liu
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Yan-Xi Fang
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Guo-Liang Zhou
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Jian-Zhong Chen
- School of Food and Drug, Anhui Science and Technology University, Fengyang 233100, China
| | - Xu He
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Cheng Huang
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Yan Huang
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Bing Zhang
- First Affiliated Hospital, Anhui Medical University, Hefei 230032, China
| | - Tong-Wen Song
- First Affiliated Hospital, Bengbu Medical College, Bengbu 233000, China
| | - Jun Li
- School of Pharmacy, Anhui Medical University, Hefei 230032, China.
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HLA-DQ genetic risk gradient for type 1 diabetes and celiac disease in northwestern Mexico. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2015; 80:135-43. [PMID: 26088570 DOI: 10.1016/j.rgmx.2015.03.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 03/20/2015] [Accepted: 03/26/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Type 1 diabetes (T1D) and celiac disease (CD) are the 2 most common autoimmune childhood diseases that share their HLA-DQ2 and DQ8 genetic origin. There has currently been an increase in both diseases worldwide. In children from the low-population State of Sonora (15 inhabitants/km(2)) in north-western Mexico, there is no information on their genetic risk or the distribution of the related alleles in the general population. AIMS To compare the HLA-DQ allele frequency in a representative sample of newborns from Sonora with that of T1D and CD patients to determine the risk gradient, and to identify the presence of celiac autoimmunity in the T1D group. METHODS The study included 397 Sonoran newborns, with 44 cases of T1D, and 25 CD cases. The CD and T1D cases were clinically diagnosed by specialists at the Hospital Infantil del Estado de Sonora, and the autoantibodies were determined by ELISA. Whole blood was collected, gDNA was extracted, and HLA-DQ2 and DQ8 were typed by PCR-SSP. The risk gradient was calculated by comparing the allele frequencies of the cases with those of the newborns. RESULTS The Sonoran HLA-DQ risk heterodimer proportion was 16.1% for HLA-DQ2 and 13.6% for HLA-DQ8, with an HLA-DQ2:HLA-DQ8 ratio of 1.2:1. The DQ8/DQ2 genotype represented a 1:14 risk for T1D, whereas the DQ8/DQB1*0201 combination showed a 1:6 risk for CD. The prevalence of CD autoimmunity in T1D children was 7%. CONCLUSION The Sonoran population has a distinctive HLA-DQ allele distribution due to its ancestry. The HLA-DQ8 combinations with DQ2 or one of its alleles conferred the highest risk for both diseases, and T1D and CD frequently appear together.
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Machado-Contreras JR, Muñoz-Valle JF, Cruz A, Salazar-Camarena DC, Marín-Rosales M, Palafox-Sánchez CA. Distribution of PTPN22 polymorphisms in SLE from western Mexico: correlation with mRNA expression and disease activity. Clin Exp Med 2015; 16:399-406. [DOI: 10.1007/s10238-015-0359-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 05/11/2015] [Indexed: 01/14/2023]
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Mejía-León M, Ruiz-Dyck K, Calderón de la Barca A. HLA-DQ genetic risk gradient for type 1 diabetes and celiac disease in north-western Mexico. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2015. [DOI: 10.1016/j.rgmxen.2015.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Dong F, Yang G, Pan HW, Huang WH, Jing LP, Liang WK, Zhang N, Zhang BH, Wang M, Liu Y, Zhang LJ, Zhang SH, Li H, Chen C, Nie LH, Jing CX. The association of PTPN22 rs2476601 polymorphism and CTLA-4 rs231775 polymorphism with LADA risks: a systematic review and meta-analysis. Acta Diabetol 2014; 51:691-703. [PMID: 25005490 PMCID: PMC4176954 DOI: 10.1007/s00592-014-0613-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 06/12/2014] [Indexed: 01/30/2023]
Abstract
Although the polymorphisms of PTPN22 and the variants of CTLA-4 have been reported to be the susceptibility genes, which increased risk of latent autoimmune diabetes in adults (LADA), the results remained inconclusive. The aim of this meta-analysis was to evaluate the association between the polymorphisms of two genes and LADA. We performed a systematic review by identifying relevant studies and applied meta-analysis to pool gene effects. Data from ten studies published between 2001 and 2013 were pooled for two polymorphisms: rs2476601 in the PTPN22 gene and rs231775 in the CTLA-4 gene. Data extraction and assessments for risk of bias were independently performed by two reviewers. Fixed-effect model and random-effect model were used to pool the odds ratios; meanwhile, heterogeneity test, publication bias and sensitive analysis were explored. The minor T allele at rs2476601 and the minor G at rs231775 carried estimated relative risks (odds ratio) of 1.52 (95 % CI 1.29-1.79) and 1.39 (95 % CI 1.11-1.74), respectively. These alleles contributed to an absolute lowering of the risk of all LADA by 4.88 and 14.93 % when individuals do not carry these alleles. The estimated lambdas were 0.49 and 0.63, suggesting a codominant model of effects was most likely for two genes. In summary, our systematic review has demonstrated that PTPN22 rs2476601 and CTLA-4 rs231775 are potential risk factors for LADA. An updated meta-analysis is required when more studies are published to increase the power of these polymorphisms and LADA.
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Affiliation(s)
- Fang Dong
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Guang Yang
- Department of Parasitology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Hong-Wei Pan
- Department of Ophthalmology, Medical School, Jinan University, Guangzhou, Guangdong China
| | - Wei-Huang Huang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Li-Peng Jing
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Wen-Kai Liang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Na Zhang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Bao-Huan Zhang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Man Wang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Yang Liu
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Li-Ju Zhang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Si-Heng Zhang
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - He Li
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Chuan Chen
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
| | - Li-Hong Nie
- Department of Endocrine, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong China
| | - Chun-Xia Jing
- Department of Epidemiology, Medical School, Jinan University, Guangzhou, 510632 Guangdong China
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14
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Xie Z, Chang C, Zhou Z. Molecular Mechanisms in Autoimmune Type 1 Diabetes: a Critical Review. Clin Rev Allergy Immunol 2014; 47:174-92. [DOI: 10.1007/s12016-014-8422-2] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Piłaciński S, Zozulińska-Ziółkiewicz DA. Influence of lifestyle on the course of type 1 diabetes mellitus. Arch Med Sci 2014; 10:124-34. [PMID: 24701225 PMCID: PMC3953982 DOI: 10.5114/aoms.2014.40739] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 05/12/2013] [Accepted: 06/02/2013] [Indexed: 12/15/2022] Open
Abstract
Type 1 diabetes (T1DM) is an autoimmune disease that requires insulin treatment from the time of diagnosis. Its clinical course depends on both genetic and environmental factors, and the lifestyle of a patient modulates their interaction. The evidence about the influence of lifestyle on the course of T1DM is increasing. In this paper, we present evidence on the relationship between lifestyle parameters and diabetes-related outcomes. We discuss the most commonly addressed factors associated with lifestyle, such as physical activity, nutrition and smoking, and those with sparse evidence in T1DM, such as socioeconomic status, sleep duration, psychological stress and illicit drugs intake.
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Affiliation(s)
- Stanisław Piłaciński
- Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poland
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16
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Bhanusali DG, Sachdev A, Olson MA, Gerlach JA, Sinha AA. PTPN22 profile indicates a novel risk group in Alopecia areata. Hum Immunol 2014; 75:81-7. [DOI: 10.1016/j.humimm.2013.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 08/21/2013] [Accepted: 09/11/2013] [Indexed: 11/16/2022]
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Cerosaletti K, Buckner JH. Protein tyrosine phosphatases and type 1 diabetes: genetic and functional implications of PTPN2 and PTPN22. Rev Diabet Stud 2012; 9:188-200. [PMID: 23804260 DOI: 10.1900/rds.2012.9.188] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Protein tyrosine phosphatases (PTPs) play a central role in modulating the transduction of cellular signals, including the cells of the immune system. Several PTPs, PTPN22, PTPN2, and UBASH3A, have been associated with risk of type 1 diabetes (T1D) by genome wide association studies. Based on the current understanding of PTPs, it is clear that these variants impact antigen receptor signaling and cytokine signaling. This impact likely contributes to the development and progression of autoimmunity through multiple mechanisms, including failures of central and peripheral tolerance and the promotion of proinflammatory T cell responses. In this review, we discuss the genetic and functional implications of two of these PTPs, PTPN22 and PTPN2, in the development of T1D. We describe the known roles of these proteins in immune function, and how the expression and function of these proteins is altered by the genetic variants associated with T1D. Yet, there are still controversies in the field that require further study and the development of new approaches to extend our understanding of these PTP variants, with the goal of using the information gained to improve our ability to predict and cure T1D.
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Affiliation(s)
- Karen Cerosaletti
- Translational Research Program, Benaroya Research Institute at Virginia Mason, Seattle, WA 98101, USA
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