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Wang J, Wu J, Sun Q, Wu Q, Li Y, Duan S, Yang L, Wu W, Wang Z, Liu Y, Tang R, Yang J, Wang C, Liu C, Xu J, Wang M, He G. Extensive genetic admixture between Tai-Kadai-speaking people and their neighbours in the northeastern region of the Yungui Plateau inferred from genome-wide variations. BMC Genomics 2023; 24:317. [PMID: 37308851 DOI: 10.1186/s12864-023-09412-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 05/27/2023] [Indexed: 06/14/2023] Open
Abstract
BACKGROUND Yungui Plateau in Southwest China is characterized by multi-language and multi-ethnic communities and is one of the regions with the wealthiest ethnolinguistic, cultural and genetic diversity in East Asia. There are numerous Tai-Kadai (TK)-speaking populations, but their detailed evolutionary history and biological adaptations are still unclear. RESULTS Here, we genotyped genome-wide SNP data of 77 unrelated TK-speaking Zhuang and Dong individuals from the Yungui Plateau and explored their detailed admixture history and adaptive features using clustering patterns, allele frequency differentiation and sharing haplotype patterns. TK-speaking Zhuang and Dong people in Guizhou are closely related to geographically close TK and Hmong-Mien (HM)-speaking populations. Besides, we identified that Guizhou TK-speaking people have a close genetic relationship with Austronesian (AN)-speaking Atayal and Paiwan people, which is supported by the common origin of the ancient Baiyue tribe. We additionally found subtle genetic differences among the newly studied TK people and previously reported Dais via the fine-scale genetic substructure analysis based on the shared haplotype chunks. Finally, we identified specific selection candidate signatures associated with several essential human immune systems and neurological disorders, which could provide evolutionary evidence for the allele frequency distribution pattern of genetic risk loci. CONCLUSIONS Our comprehensive genetic characterization of TK people suggested the strong genetic affinity within TK groups and extensive gene flow with geographically close HM and Han people. We also provided genetic evidence that supported the common origin hypothesis of TK and AN people. The best-fitted admixture models further suggested that ancestral sources from northern millet farmers and southern inland and coastal people contributed to the formation of the gene pool of the Zhuang and Dong people.
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Affiliation(s)
- Jiawen Wang
- School of Forensic Medicine, Guizhou Medical University, Guiyang, 550004, China.
| | - Jun Wu
- School of Forensic Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Qiuxia Sun
- Institute of Rare Diseases, West China Hospital of Sichuan University, Sichuan University, Chengdu, 610000, China
- Department of Forensic Medicine, College of Basic Medicine, Chongqing Medical University, Chongqing, 400331, China
| | - Qian Wu
- Qiannan Prefecture People's Hospital, Buyi and Miao Autonomous Prefecture of QianNan, Buyi and Miao Autonomous Prefecture of QianNan, 558000, China
| | - Youjing Li
- Congjiang People's Hospital, Congjiang, 557499, China
| | - Shuhan Duan
- Institute of Rare Diseases, West China Hospital of Sichuan University, Sichuan University, Chengdu, 610000, China
- School of Basic Medical Sciences, North Sichuan Medical College, Nanchong, 637000, China
| | - Lin Yang
- School of Forensic Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Wenxin Wu
- School of Forensic Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Zheng Wang
- Institute of Forensic Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Yan Liu
- Institute of Rare Diseases, West China Hospital of Sichuan University, Sichuan University, Chengdu, 610000, China
- School of Basic Medical Sciences, North Sichuan Medical College, Nanchong, 637000, China
| | - Renkuan Tang
- Department of Forensic Medicine, College of Basic Medicine, Chongqing Medical University, Chongqing, 400331, China
| | - Junbao Yang
- School of Basic Medical Sciences, North Sichuan Medical College, Nanchong, 637000, China
| | - Chuanchao Wang
- Department of Anthropology and Ethnology, School of Sociology and Anthropology, Institute of Anthropology, Xiamen University, Xiamen, 361000, China
| | - Chao Liu
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Jianwei Xu
- Department of Pharmacology, School of Basic Medicine, Guizhou Medical University, Guiyang, 550004, China.
| | - Mengge Wang
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Guanglin He
- Institute of Rare Diseases, West China Hospital of Sichuan University, Sichuan University, Chengdu, 610000, China.
- Center for Archaeological Science, Sichuan University, Chengdu, 610000, China.
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Albarzinji N, Ismael SA, Albustany D. Association of rheumatoid arthritis and its severity with human leukocytic antigen-DRB1 alleles in Kurdish region in North of Iraq. BMC Rheumatol 2022; 6:4. [PMID: 35016727 PMCID: PMC8753826 DOI: 10.1186/s41927-021-00229-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 07/30/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Rheumatoid arthritis is a complex multifactorial chronic disease, the importance of human leukocytic antigen (HLA) as a major genetic risk factor for rheumatoid arthritis was studied worldwide. The objective of this study is to identify the association of HLA-DRB1 subtypes with rheumatoid arthritis and its severity in Kurdish region. METHODS A case-control study recruited 65 rheumatoid arthritis patients and 100 healthy individuals as control group all over the Kurdistan region/Iraq. Both patient and control groups are genotyped using polymerase chain reaction with sequence specific primer. Anti-CCP antibodies were measured by ELISA test. Rheumatoid factor, C-reactive protein, and disease activity score 28 which measured by DAS-28 values were calculated. The DAS-28 was used to assess the clinical severity of the patients. RESULTS HLA-DRB1-0404 and HLA-DRB1-0405 frequencies showed a strong association with disease susceptibility (P < 0.001). The frequency of HLA-DRB1-0411 and HLA-DRB1-0413 were significantly higher in control group (P < 0.001). The frequency of rheumatoid factor and Anti-CCP were significantly higher among shared epitope-positive patients compared to shared epitope-negative patients (P < 0.001). Regarding the disease activity by DAS-28, rheumatoid arthritis patients didn't show significant difference between the shared epitope-positive and shared epitope-negative patients. CONCLUSIONS HLA-DR0404 and HLA-DR0405 alleles are related to RA, while HLA-DR1-0411 and HLA-DRB1-0413 protect against RA in the Kurdistan region in the North of Iraq.
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Abedini F, Rahmanian N, Heidari Z, Feizi A, Sherkat R, Rezaei M. Diversity of HLA class I and class II alleles in Iran populations: Systematic review and Meta-Analaysis. Transpl Immunol 2021; 69:101472. [PMID: 34555503 DOI: 10.1016/j.trim.2021.101472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 09/16/2021] [Accepted: 09/16/2021] [Indexed: 10/20/2022]
Abstract
The human leukocyte antigen (HLA) system plays an essential role in the peptides antigen presentation and more regulation of immune responses. Regarding all HLA molecules' associations with various diseases and their clinical utilities in understanding drug reactions or prediction of transplantation outcome, there is a need for much more extensive HLA data generated from Asian countries. METHOD A comprehensive search was conducted in electronic databases between 1990 and 2021 to identify relevant articles to HLA frequency in the normal Iranian population. Two independent reviewers screened and selected the eligible studies. After data extraction, the meta-analysis was performed using STATA version 14. The overall frequencies and their 95% confidence intervals (CIs) were obtained using the random-effects model. RESULTS Among 1141 studies 78 were eligible for this study and the sample sizes varied from 14 to 15,600. The most frequent alleles of HLA class I were HLA-A*02 (22%; 95%CI: 20-24%; I2 = 88.63%), -B*35 (18%; 95%CI: 16-21%; I2 = 90.95%), -C*12 (18%; 95%CI: 13-22%; I2 = 89.51%). HLA-DQA1*01 (42%; 95%CI: 40-44%; I2 = 56.80%), -DQB1*03 (38%; 95%CI: 35-42%; I2 = 92.38%), and -DRB1*11 (24%; 95%CI: 22-26%; I2 = 90.72%) were the most frequent alleles of HLA class II in Iran. DISCUSSION Our meta-analysis results point out that the comprehensive report of HLA allele frequency in the Iranian population could be helpful as reference data for planning and managing transplantation and immune disease treatment in Iran.
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Affiliation(s)
- Fateme Abedini
- Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Narges Rahmanian
- Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Zahra Heidari
- Department of Biostatistics and Epidemiology, School of Health, Isfahan University of Medical sciences, Isfahan, Iran
| | - Awat Feizi
- Department of Biostatistics and Epidemiology, School of Health, Isfahan University of Medical sciences, Isfahan, Iran
| | - Roya Sherkat
- Acquired Immunodeficiency Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Marzieh Rezaei
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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Al Naqbi H, Mawart A, Alshamsi J, Al Safar H, Tay GK. Major histocompatibility complex (MHC) associations with diseases in ethnic groups of the Arabian Peninsula. Immunogenetics 2021; 73:131-152. [PMID: 33528690 PMCID: PMC7946680 DOI: 10.1007/s00251-021-01204-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 01/05/2021] [Indexed: 12/12/2022]
Abstract
Since the discovery of human leukocyte antigens (HLAs), the function of major histocompatibility complex (MHC) gene families in a wide range of diseases have been the subject of research for decades. In particular, the associations of autoimmune disorders to allelic variants and candidate genes encoding the MHC are well documented. However, despite decades of research, the knowledge of MHC associations with human disease susceptibility have been predominantly studied in European origin, with limited understanding in different populations and ethnic groups. This is particularly evident in countries and ethnic populations of the Arabian Peninsula. Human MHC haplotypes, and its association with diseases, of the variable ethnic groups of this region are poorly studied. This review compiled published manuscripts that have reported a list of autoimmune diseases (insulin-dependent diabetes mellitus, systemic lupus erythematosus, myasthenia gravis, rheumatoid arthritis, psoriasis vulgaris, and multiple sclerosis) associated with MHC class I and class II in the populations of the Arabian Peninsula, specifically Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, the United Arab Emirates, and Yemen. Data available was compared with other three ethnic groups, namely Caucasians, Asians, and Africans. The limited data available in the public domain on the association between MHC gene and autoimmune diseases highlight the challenges in the Middle Eastern region.
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Affiliation(s)
- Halima Al Naqbi
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
- Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Aurélie Mawart
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Jawaher Alshamsi
- College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Habiba Al Safar
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
- Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
- College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Guan K Tay
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.
- Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.
- College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.
- Division of Psychiatry, Faculty of Health and Medical Sciences, The University of Western Australia, Crawley, WA, Australia.
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia.
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5
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Wysocki T, Olesińska M, Paradowska-Gorycka A. Current Understanding of an Emerging Role of HLA-DRB1 Gene in Rheumatoid Arthritis-From Research to Clinical Practice. Cells 2020; 9:cells9051127. [PMID: 32370106 PMCID: PMC7291248 DOI: 10.3390/cells9051127] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/28/2020] [Accepted: 04/30/2020] [Indexed: 12/22/2022] Open
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease with an unclear pathogenic mechanism. However, it has been proven that the key underlying risk factor is a genetic predisposition. Association studies of the HLA-DRB1 gene clearly indicate its importance in RA morbidity. This review presents the current state of knowledge on the impact of HLA-DRB1 gene, functioning both as a component of the patient’s genome and as an environmental risk factor. The impact of known HLA-DRB1 risk variants on the specific structure of the polymorphic HLA-DR molecule, and epitope binding affinity, is presented. The issues of the potential influence of HLA-DRB1 on the occurrence of non-articular disease manifestations and response to treatment are also discussed. A deeper understanding of the role of the HLA-DRB1 gene is essential to explore the complex nature of RA, which is a result of multiple contributing factors, including genetic, epigenetic and environmental factors. It also creates new opportunities to develop modern and personalized forms of therapy.
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Affiliation(s)
- Tomasz Wysocki
- Department of Systemic Connective Tissue Diseases, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland; or
- Correspondence:
| | - Marzena Olesińska
- Department of Systemic Connective Tissue Diseases, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland; or
| | - Agnieszka Paradowska-Gorycka
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland; or
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Huang YH, Khor SS, Zheng X, Chen HY, Chang YH, Chu HW, Wu PE, Lin YJ, Liao SF, Shen CY, Tokunaga K, Lee MH. A high-resolution HLA imputation system for the Taiwanese population: a study of the Taiwan Biobank. THE PHARMACOGENOMICS JOURNAL 2020; 20:695-704. [PMID: 32042094 DOI: 10.1038/s41397-020-0156-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 01/22/2020] [Accepted: 01/27/2020] [Indexed: 12/24/2022]
Abstract
An imputation algorithm for human leukocyte antigen (HLA) is helpful for exploring novel disease associations. However, population-specific HLA imputation references are essential for achieving high imputation accuracy. In this study, a subset of 1012 individuals from the Taiwan Biobank (TWB) who underwent both whole-genome SNP array and NGS-based HLA typing were used to establish Taiwanese HLA imputation references. The HIBAG package was used to generate the imputation references for eight HLA loci at a two- and three-field resolution. Internal validation was carried out to evaluate the call threshold and accuracy for each HLA gene. HLA class II genes found to be associated with rheumatoid arthritis (RA) were validated in this study by the imputed HLA alleles. Our Taiwanese population-specific references achieved average HLA imputation accuracies of 98.11% for two-field and 98.08% for three-field resolution. The frequency distribution of imputed HLA alleles among 23,972 TWB subjects were comparable with PCR-based HLA alleles in general Taiwanese reported in the allele frequency net database. We replicated four common HLA alleles (HLA-DRB1*03:01, DRB1*04:05, DQA1*03:03, and DQB1*04:01) significantly associated with RA. The population-specific references provide an informative tool to investigate the associations of HLA variants and human diseases in large-scale population-based studies.
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Affiliation(s)
- Yu-Han Huang
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Seik-Soon Khor
- Department of Human Genetics, Graduate School of Medicine, the University of Tokyo, Toyo, Japan
| | - Xiuwen Zheng
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Hsuan-Yu Chen
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Ya-Hsuan Chang
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Hou-Wei Chu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Pei-Ei Wu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yu-Ju Lin
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shu-Fen Liao
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Chen-Yang Shen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Katsushi Tokunaga
- Department of Human Genetics, Graduate School of Medicine, the University of Tokyo, Toyo, Japan.
| | - Mei-Hsuan Lee
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.
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Chinniah R, Rajendran MS, Sivanadham R, Adaikalam ML, Ravi PM, Vijayan M, Boopathy S, Pandi S, Sevak V, Karuppiah B. Association of HLA class II alleles/haplotypes and amino acid variations in the peptide binding pockets with rheumatoid arthritis. Int J Rheum Dis 2019; 22:1553-1562. [DOI: 10.1111/1756-185x.13612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/28/2019] [Accepted: 04/30/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Rathika Chinniah
- Department of Immunology Madurai Kamaraj University Madurai India
| | | | | | | | | | - Murali Vijayan
- Texas Tech University Health Sciences Center Lubbock Texas
| | | | - Sasiharan Pandi
- Department of Immunology Madurai Kamaraj University Madurai India
| | - Vandit Sevak
- Department of Immunology Madurai Kamaraj University Madurai India
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Goh LL, Yong MY, See WQ, Chee EYW, Lim PQ, Koh ET, Leong KP. NLRP1, PTPN22 and PADI4 gene polymorphisms and rheumatoid arthritis in ACPA-positive Singaporean Chinese. Rheumatol Int 2017; 37:1295-1302. [PMID: 28653215 DOI: 10.1007/s00296-017-3762-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/12/2017] [Indexed: 01/18/2023]
Abstract
Studies have shown that the genetic risk factors for rheumatoid arthritis (RA) differ substantially between Asian and Caucasian populations. Even among Asian populations, the genetic contributions of NLRP1, PTPN22 and PADI4 have been controversial. Consequently, we sought to address these separate findings and determine whether any of these proposed risk variants are associated with RA susceptibility, onset, DAS activity and erosion in a Singaporean Chinese cohort. We genotyped five SNPs within NLRP1 (rs878329 and rs6502867), PTPN22 (rs2488457 and rs6665194), and PADI4 (rs2240340) in 500 anti-cyclic citrullinated peptide antibody-positive (ACPA) patients with RA and 500 healthy controls using TaqMan assays. The CC genotype of NLRP1 rs878329 and TT genotype of PADI4 rs2240340 were associated with RA susceptibility. The risk association of the T allele of PADI4 rs2240340 with RA was confirmed through a meta-analysis based on previous reports in Asian populations. The GG genotype of PTPN22 rs6665194 (-3508A>G) was associated with significantly reduced risk of RA. No significant association was found for NLRP1 rs6502867 T/C and PTPN22 rs2488457 G/C polymorphisms. None of the five SNPs was associated with RA's clinical features. This work supports the association of the T allele of PADI4 rs2240340 with RA in Asians. The roles of NLRP1 rs878329 G/C and PTPN22 rs6665194 A/G polymorphisms were demonstrated for the first time. We also propose rs6665194 to be a promising candidate for RA risk evaluation between ethnicities.
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Affiliation(s)
- Liuh Ling Goh
- TTSH Research Laboratory, Clinical Research and Innovation Office, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.
| | - Mei Yun Yong
- TTSH Research Laboratory, Clinical Research and Innovation Office, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Wei Qiang See
- TTSH Research Laboratory, Clinical Research and Innovation Office, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Edward Yu Wing Chee
- TTSH Research Laboratory, Clinical Research and Innovation Office, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Pei Qi Lim
- TTSH Research Laboratory, Clinical Research and Innovation Office, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Ee Tzun Koh
- Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore, Singapore
| | - Khai Pang Leong
- TTSH Research Laboratory, Clinical Research and Innovation Office, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.,Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore, Singapore
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9
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Wu J, Li J, Li S, Zhang TP, Li LJ, Lv TT, Pan HF, Ye DQ. Association of HLA-DQB1 polymorphisms with rheumatoid arthritis: a meta-analysis. Postgrad Med J 2017; 93:618-625. [DOI: 10.1136/postgradmedj-2016-134724] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/09/2017] [Accepted: 03/19/2017] [Indexed: 01/26/2023]
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10
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Chowdhry M, Makroo RN, Singh M, Agrawal S, Kumar M, Thakur Y. Human leucocyte antigen Class I and II alleles associated with anti-hepatitis C virus-positive patients of North India. Indian J Med Microbiol 2017; 34:299-302. [PMID: 27514950 DOI: 10.4103/0255-0857.188317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE Humans are the only known natural hosts of hepatitis C virus (HCV). This study was undertaken to examine the frequencies of human leucocyte antigens (HLAs) Class I and Class II genotype profiles in anti-HCV-infected patients of Northern India. MATERIALS AND METHODS From a period of January 2013 to August 2014, 148 anti-HCV-positive patients of North India referred to the Department of Molecular Biology and Transplant Immunology, Indraprastha Apollo Hospitals, New Delhi, for performing HLA typing were included in the study. RESULTS AFNx0102, AFNx0131 allele frequency decreased significantly in anti-HCV-positive patients. Frequencies for HLA-B loci did not reach any statistical significance. Among the Class II alleles, HLA-DRB1FNx0103 and HLA-DRB1FNx0110 were significantly higher in the patient population, and HLA-DRB1FNx0115 was significantly decreased in the patient population as compared to the controls. CONCLUSION HLA-AFNx0133 was significantly increased as compared to control population and showed geographic variation in HCV-infected individuals of India.
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Affiliation(s)
- M Chowdhry
- Department of Transplant Immunology, Molecular Biology and Transfusion Medicine, Apollo Hospitals, New Delhi, India
| | - R N Makroo
- Department of Transplant Immunology, Molecular Biology and Transfusion Medicine, Apollo Hospitals, New Delhi, India
| | - M Singh
- Department of Transplant Immunology, Molecular Biology and Transfusion Medicine, Apollo Hospitals, New Delhi, India
| | - S Agrawal
- Department of Transplant Immunology, Molecular Biology and Transfusion Medicine, Apollo Hospitals, New Delhi, India
| | - M Kumar
- Department of Transplant Immunology, Molecular Biology and Transfusion Medicine, Apollo Hospitals, New Delhi, India
| | - Y Thakur
- Department of Transplant Immunology, Molecular Biology and Transfusion Medicine, Apollo Hospitals, New Delhi, India
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11
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The role of common protective alleles HLA-DRB1*13 among systemic autoimmune diseases. Genes Immun 2016; 18:1-7. [PMID: 27829665 DOI: 10.1038/gene.2016.40] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/26/2016] [Accepted: 09/30/2016] [Indexed: 12/25/2022]
Abstract
Associations between human leukocyte antigen (HLA) and susceptibility to systemic autoimmune diseases have been reported. The predisposing alleles are variable among ethnic groups and/or diseases. On the other hand, some HLA alleles are associated with resistance to systemic autoimmune diseases, including systemic sclerosis, systemic lupus erythematosus and rheumatoid arthritis. Interestingly, DRB1*13 alleles are the protective alleles shared by multiple autoimmune diseases. DRB1*13:01 allele is protective in European populations and DRB1*13:02 in Japanese. Because alleles in multiple HLA loci are in strong linkage disequilibrium, it is difficult to determine which of the protective alleles is functionally responsible for the protective effects. Thus far, association studies suggested that DRB1*13:02 represents at least one of the causally associated protective factors against multiple systemic autoimmune diseases in the Japanese population. The protective effect of DRB1*13 alleles appears to overcome the predisposing effect of the susceptible alleles in heterozygous individuals of DRB1*13 and the susceptible allele. A gene dosage effect was observed in the associations of DRB1*13:02 with the protection from systemic autoimmune diseases; thus homozygous individuals are more effectively protected from the systemic autoimmune diseases than heterozygotes. DRB1*13:02 also confers protection against organ-specific autoimmune diseases and some infectious diseases. Several hypotheses can be proposed for the molecular mechanisms of the protection conferred by DRB1*13, some of which can explain the dominant effect of DRB1*13 molecules over the susceptible alleles, but the actual protective function of DRB1*13 requires further study. Understanding of the protective mechanisms of DRB1*13 may lead to the identification of targets for the curative treatment of systemic autoimmune diseases.
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Lagha A, Messadi A, Boussaidi S, Kochbati S, Tazeghdenti A, Ghazouani E, Almawi WY, Yacoubi-Loueslati B. HLA DRB1/DQB1 alleles and DRB1-DQB1 haplotypes and the risk of rheumatoid arthritis in Tunisians: a population-based case-control study. HLA 2016; 88:100-9. [DOI: 10.1111/tan.12855] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 07/13/2016] [Accepted: 07/21/2016] [Indexed: 02/06/2023]
Affiliation(s)
- A. Lagha
- Laboratory of Micro-Organisms and Active Biomolecules; El Manar University, University of Sciences of Tunis; Tunis Tunisia
- Department of Immunology; Military Hospital of Tunis; Tunis Tunisia
| | - A. Messadi
- Laboratory of Micro-Organisms and Active Biomolecules; El Manar University, University of Sciences of Tunis; Tunis Tunisia
- Department of Immunology; Military Hospital of Tunis; Tunis Tunisia
| | - S. Boussaidi
- Department of Rheumatology; Habib Thameur Hospital; Tunis Tunisia
| | - S. Kochbati
- Department of Rheumatology; Habib Thameur Hospital; Tunis Tunisia
| | - A. Tazeghdenti
- Laboratory of Micro-Organisms and Active Biomolecules; El Manar University, University of Sciences of Tunis; Tunis Tunisia
| | - E. Ghazouani
- Department of Immunology; Military Hospital of Tunis; Tunis Tunisia
| | - W. Y. Almawi
- Department of Medical Biochemistry; Arabian Gulf University; Manama Bahrain
| | - B. Yacoubi-Loueslati
- Laboratory of Micro-Organisms and Active Biomolecules; El Manar University, University of Sciences of Tunis; Tunis Tunisia
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Wang J, Zhang H, Wang GQ, Quan Y. HLA-DRB1 gene polymorphisms and its associations with rheumatoid arthritis in Chinese Han women of Shaanxi province, northwest of China. Int J Immunogenet 2015; 43:25-31. [PMID: 26615796 DOI: 10.1111/iji.12242] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/24/2015] [Accepted: 10/25/2015] [Indexed: 11/28/2022]
Affiliation(s)
- J. Wang
- Second Department of Rheumatology; The Fifth Hospital of Xi'an City; Xi'an China
| | - H. Zhang
- Department of Gynecology; Tumor Hospital of Shaanxi Province; Xi'an China
| | - G.-Q. Wang
- Department of Gynecology; Tumor Hospital of Shaanxi Province; Xi'an China
| | - Y. Quan
- Second Department of Rheumatology; The Fifth Hospital of Xi'an City; Xi'an China
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The Protective Role of HLA-DRB1(∗)13 in Autoimmune Diseases. J Immunol Res 2015; 2015:948723. [PMID: 26605347 PMCID: PMC4641944 DOI: 10.1155/2015/948723] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/20/2015] [Indexed: 12/23/2022] Open
Abstract
Autoimmune diseases (AIDs) are characterized by a multifactorial aetiology and a complex genetic background, with the MHC region playing a major role. We genotyped for HLA-DRB1 locus 1228 patients with AIDs-213 with Systemic Lupus Erythematosus (SLE), 166 with Psoriasis or Psoriatic Arthritis (Ps + PsA), 153 with Rheumatoid Arthritis (RA), 67 with Systemic Sclerosis (SSc), 536 with Multiple Sclerosis (MS), and 93 with Myasthenia Gravis (MG) and 282 unrelated controls. We confirmed previously established associations of HLA-DRB1∗15 (OR = 2.17) and HLA-DRB1∗03 (OR = 1.81) alleles with MS, HLA-DRB1∗03 with SLE (OR = 2.49), HLA-DRB1∗01 (OR = 1.79) and HLA-DRB1∗04 (OR = 2.81) with RA, HLA-DRB1∗07 with Ps + PsA (OR = 1.79), HLA-DRB1∗01 (OR = 2.28) and HLA-DRB1∗08 (OR = 3.01) with SSc, and HLA-DRB1∗03 with MG (OR = 2.98). We further observed a consistent negative association of HLA-DRB1∗13 allele with SLE, Ps + PsA, RA, and SSc (18.3%, 19.3%, 16.3%, and 11.9%, resp., versus 29.8% in controls). HLA-DRB1∗13 frequency in the AIDs group was 20.0% (OR = 0.58). Although different alleles were associated with particular AIDs, the same allele, HLA-DRB1∗13, was underrepresented in all of the six diseases analysed. This observation suggests that this allele may confer protection for AIDs, particularly for systemic and rheumatic disease. The protective effect of HLA-DRB1∗13 could be explained by a more proficient antigen presentation by these molecules, favouring efficient clonal deletion during thymic selection.
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Associations of human leukocyte antigens with autoimmune diseases: challenges in identifying the mechanism. J Hum Genet 2015; 60:697-702. [PMID: 26290149 DOI: 10.1038/jhg.2015.100] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/22/2015] [Accepted: 07/23/2015] [Indexed: 12/24/2022]
Abstract
The mechanism of genetic associations between human leukocyte antigen (HLA) and susceptibility to autoimmune disorders has remained elusive for most of the diseases, including rheumatoid arthritis (RA) and type 1 diabetes (T1D), for which both the genetic associations and pathogenic mechanisms have been extensively analyzed. In this review, we summarize what are currently known about the mechanisms of HLA associations with RA and T1D, and elucidate the potential mechanistic basis of the HLA-autoimmunity associations. In RA, the established association between the shared epitope (SE) and RA risk has been explained, at least in part, by the involvement of SE in the presentation of citrullinated peptides, as confirmed by the structural analysis of DR4-citrullinated peptide complex. Self-peptide(s) that might explain the predispositions of variants at 11β and 13β in DRB1 to RA risk have not currently been identified. Regarding the mechanism of T1D, pancreatic self-peptides that are presented weakly on the susceptible HLA allele products are recognized by self-reactive T cells. Other studies have revealed that DQ proteins encoded by the T1D susceptible DQ haplotypes are intrinsically unstable. These findings indicate that the T1D susceptible DQ haplotypes might confer risk for T1D by facilitating the formation of unstable HLA-self-peptide complex. The studies of RA and T1D reveal the two distinct mechanistic basis that might operate in the HLA-autoimmunity associations. Combination of these mechanisms, together with other functional variations among the DR and DQ alleles, may generate the complex patterns of DR-DQ haplotype associations with autoimmunity.
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Abstract
Rheumatoid arthritis is a chronic inflammatory debilitating disease triggered by a complex interaction involving genetic and environmental factors. Active smoking and occupational exposures such as silica increase its risk, suggesting that initial inflammation and generation of rheumatoid arthritis-related autoantibodies in the lungs may precede the clinical disease. This hypothesis paved the way to epidemiological studies investigating air pollution as a potential determinant of rheumatoid arthritis. Studies designed for epidemiology of rheumatoid arthritis found a link between traffic, a surrogate of air pollution, and this disease. Furthermore, a small case–control study recently found an association between wood smoke exposure and anticyclic citrullinated protein/peptide antibody in sera of patients presenting wood-smoke-related chronic obstructive pulmonary disease. However, reports addressing impact of specific pollutants on rheumatoid arthritis incidence and severity across populations are somewhat conflicting. In addition to the link reported between other systemic autoimmune rheumatic diseases and particulate matters/gaseous pollutants, experimental observation of exacerbated rheumatoid arthritis incidence and severity in mice models of collagen-induced arthritis after diesel exhaust particles exposure as well as hypovitaminosis D-related autoimmunity can help understand the role of air pollution in rheumatoid arthritis. All these considerations highlight the necessity to extend high quality epidemiological researches investigating different sources of atmospheric pollution across populations and particularly in low-and-middle countries, in order to further explore the biological plausibility of air pollution’s effect in the pathogenesis of rheumatoid arthritis. This should be attempted to better inform policies aiming to reduce the burden of rheumatoid arthritis.
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Affiliation(s)
- Mickael Essouma
- Division of Medicine, Sangmelima's Reference Hospital, P.O. Box 890, Sangmelima, Cameroon
| | - Jean Jacques N Noubiap
- Department of Medicine, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa ; Medical Diagnostic Center, Yaoundé, Cameroon
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Louthrenoo W, Kasitanon N, Wangkaew S, Kuwata S, Takeuchi F. Distribution of HLA-DR alleles among Thai patients with rheumatoid arthritis. Hum Immunol 2015; 76:113-7. [DOI: 10.1016/j.humimm.2015.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 09/01/2014] [Accepted: 01/15/2015] [Indexed: 12/09/2022]
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Saghafi M, Nohesara N, Rafatpanah H, Shariati J, Shakeri MT. HLA-DRB1 frequency in patients with familial and sporadic rheumatoid arthritis in north east of Iran. Clin Rheumatol 2014; 33:1397-402. [PMID: 24760193 DOI: 10.1007/s10067-014-2628-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 10/25/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease of the joints that has a strong correlation with HLA-DRB1. Family history is considered a known risk factor for RA. The aims of this study were to compare the frequency of HLA-DRB1 alleles between patients with sporadic and familial RA and also between healthy controls with RA patients (sporadic and familial) and clarify if familial RA is more severe than sporadic RA. This study included 129 consecutive patients with sporadic and 48 cases with familial (first-degree siblings) RA who visited a rheumatology unit. Demographic data, including extra-articular involvement, mean disease activity according to DAS28 (ESR) criteria, and main laboratory findings, were compared between patients with sporadic and familial RA. HLA-DRB1 typing was carried out using the PCR-SSP method, and the frequency of each allele was determined in all cases and compared with the results of HLA-DRB1 frequencies in 72 healthy controls who were previously reported by our group in northeast Iran. Patients with sporadic and familial RA were matched in age and sex, most of the cases in both groups were females. The mean age of patients was 45 years. Ocular involvement was the most frequent extra-articular manifestation of our patients. There was no significant difference between the two groups in visual analogue scale (VAS) index, number of inflamed or tender joints, extra-articular involvements, and main laboratory findings. HLA-DRB1* 01 (55 %), 04 (48 %), and 03 (43 %) alleles were the most frequent alleles in both sporadic and familial diseases. The frequency of HLA-DRB1*11 and HLA-DRB1*13 was significantly higher in normal participants compared with RA (p = 0.001). There was no significant difference in the HLA-DRB1 allele's frequency between sporadic and familial RA. Therefore, familial aggregation was not associated with RA severity.
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Affiliation(s)
- Massoud Saghafi
- Rheumatic Diseases Research Center, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Caucasian origin of disease associated HLA haplotypes in chinese blood donors with IgA deficiency. J Clin Immunol 2014; 34:157-62. [PMID: 24402621 DOI: 10.1007/s10875-013-9983-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 12/20/2013] [Indexed: 02/07/2023]
Abstract
PURPOSE Selective immunoglobulin A deficiency (IgAD) is the most common primary immunodeficiency in Caucasians with a prevalence of 1:600. However, the prevalence of IgAD is markedly lower in East Asian countries but no genetic studies have been performed on IgAD individuals in the Mongoloid population. METHODS We investigated the prevalence of IgAD in a large number of Chinese blood donors (n = 39,015) in Shanghai, China. We measured immunoglobulin class, IgG subclass and anti-IgA serum levels among the IgAD donors. These donors were subsequently tissue typed and the allele frequency was compared with the Shanghai bone marrow donor HLA registry. RESULTS Seventeen IgAD Chinese blood donors were identified, giving a prevalence of 1: 2,295. Two previously identified IgAD blood donor samples were added in the subsequent tests. Most IgAD donors had serum IgG levels above the normal range with no major IgG subclass deficiency and one donor was weakly positive for anti-IgA. Two-thirds of the Chinese IgAD donors carried Caucasian IgAD associated risk haplotypes, including DRB1*0301-DQB1*0201, DRB1*0701-DQB1*0202 and DRB1*0102-DQB1*0501, giving a significantly higher frequency of these haplotypes as compared to the Shanghai bone marrow donor HLA registry. CONCLUSIONS The prevalence of IgAD in Chinese in this study is markedly lower than in Caucasians. This is the first study to investigate the genetics of IgAD in the Mongoloid population and two-thirds of the Chinese IgAD donors showed a mixture of Caucasian IgAD risk haplotypes. The low prevalence of IgAD could potentially be due to the low frequency of the disease associated risk haplotypes in China.
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Yang M, Kuang X, Li J, Pan Y, Tan M, Lu B, Cheng Q, Wu L, Pang G. Meta-analysis of the association of HLA-DRB1 with rheumatoid arthritis in Chinese populations. BMC Musculoskelet Disord 2013; 14:307. [PMID: 24161032 PMCID: PMC4231398 DOI: 10.1186/1471-2474-14-307] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 10/21/2013] [Indexed: 11/10/2022] Open
Abstract
Background Individual studies have reported different results regarding the association of HLA alleles with RA in Chinese populations. This study was performed to systematically summarize results on the association of HLA-DRB1 with rheumatoid arthritis (RA) in China. Methods We examined the case–control studies concerned about the relationship between HLA-DRB1and RA and differences of clinical and laboratory parameters between the HLA-DR4 (DR4)+ and DR4- in RA patients in Chinese populations. Odds ratios (ORs) and weighted mean difference (WMD) with corresponding 95% confidence intervals (CI) was used to describe the relationship. Results 22 studies with 1690 cases and 1793 controls were included. Chinese populations with RA had significantly higher frequencies of HLA-DRB1*04, *0401, *0404, *0405 and *0410 than controls (ORDRB1*04 =4.19, 95% CI =3.44–5.11, p<0.00001; ORDRB1*0401 =2.53, 95% CI =1.54–4.16, p=0.0003; ORDRB1*0404 =2.28, 95% CI =1.28–4.06, p=0.005; ORDRB1*0405=3.71, 95% CI =2.52–5.45, p<0.00001; ORDRB1*0410 =2.99, 95% CI =1.25–7.14, p=0.01respectively). As to laboratory parameters, Erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), Rheumatoid factor (RF), Anti-cyclic citrullinated peptide antibodies (Anti-CCP ) in patients with DR4+ were higher than patients with DR4- (WMD=0.26, 95% CI =0.15–0.37, p<0.00001; WMD = 0.26, 95% CI =0.12–0.41, p=0.0005; WMD = 0.44, 95% CI =0.23–0.65, p<0.00001; WMD = 0.58, 95% CI =0.24–0.91, p=0.0007 respectively). As to clinical features, there was no difference in duration of morning stiffness, number of swollen joints, number of joint tenderness, X-ray phases and joint function between the DR4+ and DR4- in RA patients. Conclusions It was found that HLA-DRB1*04, *0401, *0404, *0405 and *0410 are risk factors for RA in Chinese populations. ESR, CRP, RF, Anti-CCP are different between the DR4+ and DR4- in RA patients in Chinese populations, while there’s no difference for indexes of clinical features.
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Affiliation(s)
| | | | - Jianmin Li
- Department of Dermatology, the third affiliated hospital of Guangxi Medical University, 13 Dancun Road, Nanning 530031, Guangxi, People's Republic of China.
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Muazzam AG, Mansoor A, Ali L, Siddiqi S, Hameed A, Ajmal M, Mazhar K. Association of HLA-DRB1 and -DQB1alleles and haplotypes with rheumatoid arthritis in a Pakistani population. Arthritis Res Ther 2013; 15:R95. [PMID: 23968403 PMCID: PMC3978885 DOI: 10.1186/ar4275] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 08/22/2013] [Indexed: 12/02/2022] Open
Abstract
Introduction Rheumatoid arthritis is an autoimmune disease with poorly understood pathophysiology. Genetic components of disease etiology, especially human leukocyte antigen (HLA) associations, are well known. Ethnic differences account for a number of variations in disease association with the HLA locus and there seem to be differences in various studies regarding its genetic predisposition. This study was aimed at determining the contribution of DRB1 and DQB1 components of HLA class II in rheumatoid arthritis in a Pakistani cohort. Method For this study, 110 patients and 120 healthy controls from the same geographical area and matched ethnicity were enrolled. Blood DNA was isolated from all the subjects and HLA alleles were typed following allele specific amplification. Subsequently, haplotypes were generated and allelic and haplotype distribution frequencies were compared among the patients and controls using χ2 and Arlequin software. The data obtained by this analysis were also compared with other reported associations found in the Pakistani population by meta-analysis. Results HLA allelic status was determined among the patients and controls from the same geographical area to account for differences in ethnicity and environmental factors. Significant associations were found for alleles as well as haplotypes among the patients of rheumatoid arthritis. DRB1*10, DQB1*05 and DQB1*602 were found to be associated with disease susceptibility, whereas DRB1*11 and DQB1*02 had protective effect against the disease. Similarly, haplotype DRB1*10-DQB1*05 was associated disease risk, whereas DRB1*07-DQB1*02 and DRB1*11-DQB1*0301 had a protective effect. Conclusion There is a significant DRB1and DQB1 allele and haplotype association with rheumatoid arthritis susceptibility and protection.
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Liu X, Guo J, Jia Y, Zhao Y, Liu X, Cheng F, Li X, Zheng Y, Shi X, Li H, Huang C, Cheng Y, Lai B, Huang Y, Wang T, Ding B, Li Z. HLA-DRB1 shared epitope-dependent DR-DQ haplotypes are associated with both anti-CCP-positive and -negative rheumatoid arthritis in Chinese Han. PLoS One 2013; 8:e71373. [PMID: 23951149 PMCID: PMC3741114 DOI: 10.1371/journal.pone.0071373] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 07/02/2013] [Indexed: 01/29/2023] Open
Abstract
The association between Human Leukocyte Antigen (HLA) class II and rheumatoid arthritis (RA) has been extensively studied, but few reported DR-DQ haplotype. Here we investigated the association of HLA-DRB1, DQA1, DQB1, and DR-DQ haplotypes with RA susceptibility and with anti-CCP antibodies in 281 RA patients and 297 control in Han population. High-resolution genotyping were performed. The HLA-DRB1 shared epitope (SE)-encoding allele *0405 displayed the most significant RA association (P = 1.35×10−6). The grouped DRB1 SE alleles showed great association with RA (P = 3.88×10−13). The DRB1 DRRAA alleles displayed significant protective effects (P = 0.021). The SE-dependent DR-DQ haplotype SE-DQ3/4/5 remained strong association with both anti-CCP -positive (P = 3.71×10−13) and -negative RA (P = 3.89×10−5). Our study revealed that SE alleles and its haplotypes SE-DQ3/4/5 were highly associated with RA susceptibility in Han population. The SE-DQ3/4/5 haplotypes were associated with both anti-CCP positive RA and -negative RA.
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Affiliation(s)
- Xu Liu
- Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China
| | - Jianping Guo
- Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China
| | - Yuan Jia
- Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China
| | - Yi Zhao
- Department of Rheumatology, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Xia Liu
- Department of Rheumatology, China-Japan Friendship Hospital, Chaoyang District, Beijing, China
| | - Feng Cheng
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Haidian District, Beijing, China
| | - Xiaoxia Li
- Department of Rheumatology, Xuanwu Hospital Capital Medical University, Beijing, China
| | - Yi Zheng
- Department of Rheumatology, Chao-yang Hospital, Chaoyang District, Beijing, China
| | - Xuhua Shi
- Department of Rheumatology, Chao-yang Hospital, Chaoyang District, Beijing, China
| | - Haiyun Li
- Department of Rheumatology, Chao-yang Hospital, Chaoyang District, Beijing, China
| | - Cibo Huang
- Department of Rheumatology, Beijing Hospital of the Ministry of Health, Beijing, China
| | - Yongjing Cheng
- Department of Rheumatology, Beijing Hospital of the Ministry of Health, Beijing, China
| | - Bei Lai
- Department of Rheumatology, Beijing Hospital of the Ministry of Health, Beijing, China
| | - Yanhong Huang
- Department of Rheumatology, Beijing Jishuitan Hospital, Beijing, China
| | - Tian Wang
- Department of Internal Medicine, Beijing Anzhen Hospital Capital Medical University, Beijing, China
| | - Bo Ding
- Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - ZhangGuo Li
- Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China
- * E-mail: mailto:
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Distribution of HLA-DRβ1 alleles among well-characterized rheumatoid arthritis patients from Western India. Rheumatol Int 2013; 34:705-8. [PMID: 23636621 DOI: 10.1007/s00296-013-2758-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 04/12/2013] [Indexed: 10/26/2022]
Abstract
An association between human leukocyte antigen-DRβ1*04 and rheumatoid arthritis (RA) has been known for more than 25 years. It has been observed in many different populations, and it accounts for approximately one-third of the genetic component of RA susceptibility. Our aim was to study the distribution of HLA-DRβ1 alleles in well-characterized RA patients from Western India. Polymerase chain reaction-based sequence-specific oligonucleotide probing (PCR-SSOP) technique was used to identify HLA-DRβ1 alleles among 80 clinically well-defined patients and 90 normal controls from same ethnicity. A significant increase in the frequency of DRβ1*04 was observed among RA patients (PF% 30 vs. 7.7, OR 4.959, p value 0.00018), whereas DRβ1*03 and *14 were significantly decreased among patients when compared with controls (DRβ1*03, PF% 8.75 vs. 26.6, OR 0.2637, p value 0.00253; DRβ1*14, PF% 17.5 vs. 30.0, OR 0.4949, p value 0.05722). Our results suggest that DRβ1*04 was strongly associated with well-characterized RA patients from Western India, whereas DRβ1*03 and *14 may be protective alleles for RA. The identification of susceptible allele in patients with RA may help physician to make early decisions regarding initiation of early intensive therapy with disease modifying anti-rheumatic drugs and biological agents to decrease disability in RA patients.
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Richman NC, Yazdany J, Graf J, Chernitskiy V, Imboden JB. Extraarticular manifestations of rheumatoid arthritis in a multiethnic cohort of predominantly Hispanic and Asian patients. Medicine (Baltimore) 2013; 92:92-97. [PMID: 23429352 PMCID: PMC4028062 DOI: 10.1097/md.0b013e318289ce01] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
We conducted a study to determine the prevalence of extraarticular manifestations (ExRA) in a cohort of predominantly Hispanic and Asian patients with rheumatoid arthritis (RA), to identify factors associated with the development of ExRA, and to compare the prevalence of ExRA between Hispanic and Asian patients. Patients with RA followed in the outpatient rheumatology clinics of a public hospital were included if they were aged ≥18 years and met the 1987 American College of Rheumatology criteria for the diagnosis of RA. We performed a cross-sectional analysis in which patients with ExRA were identified based on predefined criteria. We compared sociodemographic and clinical characteristics in patients with and without ExRA. Multivariate logistic regression was used to examine the association between sociodemographic variables, clinical characteristics, and the presence of ExRA. The prevalence of ExRA was 21.5%, and the most common manifestations were subcutaneous nodules (17.2%) and interstitial lung disease (3.6%). Hispanic patients were significantly more likely to develop ExRA than Asian patients (odds ratio, 2.53; 95% confidence interval, 1.26-5.09). The development of ExRA was also associated with disease duration, male sex, and seropositivity for serum rheumatoid factor.
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Affiliation(s)
- Nicole C Richman
- From Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, California
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Mourad J, Monem F. Associação do alelo HLA-DRB1 com suscetibilidade a artrite reumatoide e gravidade da doença na Síria. REVISTA BRASILEIRA DE REUMATOLOGIA 2013. [DOI: 10.1590/s0482-50042013000100005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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HLA-DRβ1*04 typing by simple in-house PCR-SSP technique for rheumatoid arthritis patients. Rheumatol Int 2012; 33:867-70. [PMID: 22623274 DOI: 10.1007/s00296-012-2448-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Accepted: 05/06/2012] [Indexed: 10/28/2022]
Abstract
A strong association between rheumatoid arthritis (RA) and human leukocyte antigen (HLA) has been observed in many different populations and that accounts for approximately one-third of the genetic component of RA susceptibility. The greatest effect comes from DRβ1 gene where the strongest association has been found with DRβ1*04 (DR4) allele. As serology has some disadvantages over polymerase chain reaction (PCR)-based techniques and commercially available PCR-based kits are expensive, this study was aimed to standardize simple in-house PCR-SSP technique. Accuracy of this test was further checked with standard PCR-SSOP (RLS) results. The frequency HLA-DRβ1*04 was significantly increased among RA patients when compared with normal controls. In this study, a very simple, convenient and more cost-effective in-house PCR-SSP technique was standardized for HLA-DRβ1*04 typing that is helpful to RA diagnosis in developing countries like India, which can be used as a good screening test.
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Freed BM, Schuyler RP, Aubrey MT. Association of the HLA-DRB1 epitope LA(67, 74) with rheumatoid arthritis and citrullinated vimentin binding. ACTA ACUST UNITED AC 2012; 63:3733-9. [PMID: 22094856 DOI: 10.1002/art.30636] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Although rheumatoid arthritis (RA) has long been associated with an HLA-DRB1 shared epitope, a systematic search for other epitopes has never been conducted. In addition, the relationship between these epitopes and the binding of citrullinated autoantigens has not been investigated. We developed a program that can analyze HLA data for all possible epitopes of up to 5 amino acids and used this program to assess the shared epitope hypothesis in RA. METHODS We analyzed high-resolution data from the International Histocompatibility Working Group, which included a group of 488 patients with RA and a group of 448 racially and ethnically balanced control subjects, for all combinations of up to 5 amino acids among polymorphic HLA-DRB1 positions 8-93. Statistical significance was determined by chi-square and Fisher's exact tests, with a false discovery rate correction. RESULTS Three residues (V(11), H(13), and L(67)) were found to have the highest degree of association with RA susceptibility (P < 10(-11)), and D(70) was found to correlate best with RA resistance (P = 2 × 10(-11)). Of >2 million epitopes examined, LA(67, 74) exhibited the highest correlation with RA susceptibility (P = 2 × 10(-20); odds ratio 4.07 [95% confidence interval 3.07-5.39]). HLA alleles containing the LA(67, 74) epitope exhibited significantly greater binding to citrullinated vimentin(65-77) than did alleles containing D(70). Only 1 allele (DRB1*16:02) contained both LA(67, 74) and D(70); it bound citrullinated vimentin weakly and was not associated with RA. CONCLUSION The findings of these studies confirm the importance of HLA-DRB1 amino acids in pocket 4 for the binding of citrullinated autoantigens and susceptibility to RA.
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Affiliation(s)
- Brian M Freed
- ClinImmune Labs and University of Colorado School of Medicine, Aurora, CO 80045, USA.
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Nakaoka H, Cui T, Tajima A, Oka A, Mitsunaga S, Kashiwase K, Homma Y, Sato S, Suzuki Y, Inoko H, Inoue I. A systems genetics approach provides a bridge from discovered genetic variants to biological pathways in rheumatoid arthritis. PLoS One 2011; 6:e25389. [PMID: 21980439 PMCID: PMC3182219 DOI: 10.1371/journal.pone.0025389] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 09/02/2011] [Indexed: 11/18/2022] Open
Abstract
Genome-wide association studies (GWAS) have yielded novel genetic loci underlying common diseases. We propose a systems genetics approach to utilize these discoveries for better understanding of the genetic architecture of rheumatoid arthritis (RA). Current evidence of genetic associations with RA was sought through PubMed and the NHGRI GWAS catalog. The associations of 15 single nucleotide polymorphisms and HLA-DRB1 alleles were confirmed in 1,287 cases and 1,500 controls of Japanese subjects. Among these, HLA-DRB1 alleles and eight SNPs showed significant associations and all but one of the variants had the same direction of effect as identified in the previous studies, indicating that the genetic risk factors underlying RA are shared across populations. By receiver operating characteristic curve analysis, the area under the curve (AUC) for the genetic risk score based on the selected variants was 68.4%. For seropositive RA patients only, the AUC improved to 70.9%, indicating good but suboptimal predictive ability. A simulation study shows that more than 200 additional loci with similar effect size as recent GWAS findings or 20 rare variants with intermediate effects are needed to achieve AUC = 80.0%. We performed the random walk with restart (RWR) algorithm to prioritize genes for future mapping studies. The performance of the algorithm was confirmed by leave-one-out cross-validation. The RWR algorithm pointed to ZAP70 in the first rank, in which mutation causes RA-like autoimmune arthritis in mice. By applying the hierarchical clustering method to a subnetwork comprising RA-associated genes and top-ranked genes by the RWR, we found three functional modules relevant to RA etiology: "leukocyte activation and differentiation", "pattern-recognition receptor signaling pathway", and "chemokines and their receptors".These results suggest that the systems genetics approach is useful to find directions of future mapping strategies to illuminate biological pathways.
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Affiliation(s)
- Hirofumi Nakaoka
- Division of Human Genetics, Department of Integrated Genetics, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Tailin Cui
- Division of Molecular Life Science, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Atsushi Tajima
- Division of Molecular Life Science, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
- Department of Human Genetics and Public Health, Institute of Health Biosciences, The University of Tokusima Graduate School, Tokushima, Tokushima, Japan
| | - Akira Oka
- Division of Molecular Life Science, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Shigeki Mitsunaga
- Division of Molecular Life Science, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Koichi Kashiwase
- Department of Laboratory, Japanese Red Cross Tokyo Blood Center, Koto-ku, Tokyo, Japan
| | - Yasuhiko Homma
- Department of Clinical Health Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Shinji Sato
- Department of Internal Medicine, Division of Rheumatology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Yasuo Suzuki
- Department of Internal Medicine, Division of Rheumatology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Hidetoshi Inoko
- Division of Molecular Life Science, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Ituro Inoue
- Division of Human Genetics, Department of Integrated Genetics, National Institute of Genetics, Mishima, Shizuoka, Japan
- Division of Molecular Life Science, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
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Uçar F, Çapkin E, Karkucak M, Yücel B, Sönmez M, Alver A, Kaklikkaya N, Tosun M, Alemdaroğlu E, Solak M. Associations of HLA-DRB1 alleles with anti-citrullinated protein antibody-positive and anti-citrullinated protein antibody-negative rheumatoid arthritis in northern east part of Turkey. Int J Rheum Dis 2011; 15:538-45. [PMID: 23253237 DOI: 10.1111/j.1756-185x.2011.01604.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
AIM The aim of this study was to investigate the associations between human leukocyte antigen (HLA)-DRB1 alleles with genetic susceptibility to rheumatoid arthritis (RA) and production of antibodies against cyclic citrullinated peptide (anti-CCP antibody) and rheumatoid factor (RF) in Turkish RA patients. METHODS We studied 291 RA patients and 253 controls. Genotyping was performed by polymerase chain reaction with sequence-specific oligonucleotide probes hybridization method. Serum levels of anti-CCP antibody, IgM-RF and high sensitive C-reactive protein titers were measured by commercial kits using immunological methods. RESULTS We found that HLA-DRB1*04 and *09 alleles were associated in anti-CCP+ and anti-CCP+ RA patients (P < 0.0001 and P < 0.001, respectively), while DRB1*01 and *04 were determined to be higher in RF+ RA patients (P < 0.001 and P < 0.0001, respectively). Moreover, DRB1*11 and DRB1*13 alleles were determined to be lower in RF and anti-CCP/RF+ RA patients (P < 0.001 for both). HLA-DRB1*04 was identified as a common responsible allele for susceptibility to the disease in anti-CCP, RF and anti-CCP/RF- RA patients (P = 0.0018, P = 0.0004 and P = 0.0023, respectively). HLA-DRB1*13 allele alone was found to be protective against to anti-CCP+ and RF- RA (P = 0.0003 and P = 0.006, respectively). On the contrary, there was no protective allele in anti-CCP/RF- RA as well as anti-CCP- RA patients. CONCLUSION This study indicates that associate and protective HLA-DRB1 allele distributions are different in autoantibody (anti-CCP or RF or anti-CCP/RF)+ RA and autoantibody- RA patients, with exceptions of DRB1*04 and DRB1*13.
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Affiliation(s)
- Fahri Uçar
- Departments of Medical Biology & Genetics, Karadeniz Technical University, Trabzon, Turkey.
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Sandoughi M, Fazaeli A, Bardestani G, Hashemi M. Frequency of HLA-DRB1 alleles in rheumatoid arthritis patients in Zahedan, southeast Iran. Ann Saudi Med 2011; 31:171-3. [PMID: 21422655 PMCID: PMC3102478 DOI: 10.4103/0256-4947.78205] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Analysis of the role of different alleles of human leukocyte antigen (HLA) in rheumatoid arthritis (RA) patients is necessary in many populations and geographical areas. The aim of the present study was to investigate the frequency of HLA-DRB1 alleles in RA patients, comparing with that in control group in southeast Iran. DESIGN AND SETTING Case-control study of rheumatoid arthritis patients referred to rheumatology clinic at university hospital. PATIENTS AND METHODS The frequency of HLA-DRB1 alleles was determined in 79 RA patients and 93 healthy subjects in Zahedan, southeast Iran. HLA-DRB1 allele types were identified by polymerase chain reaction with sequence-specific primer (PCR-SSP). RESULTS The HLA-DRB1FNx0110 allele showed a significantly higher frequency in patients with RA (OR=2.698, 95% CI=1.087-6.699, P=.045), while the frequency of DRB1FNx0103 allele in these subjects was significantly lower than that in the control group (OR=0.447, 95% CI=0.2285-0.8729, P=.021). The frequencies of DRB1FNx0101, DRB1FNx0104, DRB1FNx0107, DRB1FNx0109, DRB1FNx0111, DRB1FNx0113, DRB1FNx0114, DRB1FNx0115, DRB1FNx0116 were not significantly different between RA subjects and the control group. CONCLUSION The data suggest that the DRB1FNx0110 allele is a risk factor and DRB1FNx0103 is protective for RA in this population.
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Affiliation(s)
- Mahnaz Sandoughi
- Department of Medical Parasitology, Medical School, Zahedan University of Medical Sciences, Zahedan, Iran
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HLA-DRB1 allele distribution and its relation to rheumatoid arthritis in eastern Black Sea Turkish population. Rheumatol Int 2011; 32:1003-7. [PMID: 21246357 DOI: 10.1007/s00296-010-1792-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Accepted: 12/31/2010] [Indexed: 12/24/2022]
Abstract
Rheumatoid arthritis (RA [MIM 180300]) is a complex, polygenic inflammatory autoimmune disease, resulting from interactions between genetic and environmental factors. Some of the RA-associated HLA-DRB1 alleles have shared epitope, but their distribution varies among different racial/ethnic groups. This study was aimed at investigating the distribution of HLA-DRB1 alleles in patients with RA in eastern Black Sea region of Turkey. DNA samples of 320 patients with RA and 360 healthy controls were studied for the determination of HLA-DRB1 allele distribution using PCR-SSP method. The allele frequencies of HLA-DRB1*01, *04, and *09 were higher in patients with RA compared with the controls (P < 0.005, P < 0.0001, and P < 0.01, respectively). On the other hand, in patients with RA, HLA-DRB1*13 allele was lower than the controls (P < 0.001). Of the HLA-DRB1*04 subgroups, *0401 (40.83% vs. 18.75%, P < 0.001) was the most frequent allele in patients with RA, while DRB1*0402 (30.00% vs. 12.50%, P < 0.005) allele in the controls. HLA-DRB1 allele frequencies in the patients with RA and the controls showed Hardy-Weinberg rule compliance. Results of this study indicate that HLA-DRB1*01, *04, and *09 alleles were associated with RA, and HLA-DRB1*13 was protective allele against RA. Among the subgroups of HLA-DRB1*04, *0401 was detected to be RA associated, while *0402 was being protective. These results have some differences compared with previous reports originating from other regions of Turkey.
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Sun Y, Zhu F, Wang M, Ma S, Liao Y. Association Analysis about HLA-DRB1, -DQB1 Polymorphism and Auto-Antibodies Against α1-Adrenergic Receptors in Chinese Patients with Essential Hypertension. Clin Exp Hypertens 2010; 32:532-9. [PMID: 21091360 DOI: 10.3109/10641963.2010.496520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yanxiang Sun
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
- Zhongshan Hospital, Sun YAT-SEN University, Guangdong, China
| | - Feng Zhu
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Min Wang
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Shihui Ma
- Zhongshan Hospital, Sun YAT-SEN University, Guangdong, China
| | - Yuhua Liao
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
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Kuniholm MH, Kovacs A, Gao X, Xue X, Marti D, Thio CL, Peters MG, Terrault NA, Greenblatt RM, Goedert JJ, Cohen MH, Minkoff H, Gange SJ, Anastos K, Fazzari M, Harris TG, Young MA, Strickler HD, Carrington M. Specific human leukocyte antigen class I and II alleles associated with hepatitis C virus viremia. Hepatology 2010; 51:1514-22. [PMID: 20169624 PMCID: PMC2946382 DOI: 10.1002/hep.23515] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
UNLABELLED Studies of human leukocyte antigen (HLA) alleles and their relation with hepatitis C virus (HCV) viremia have had conflicting results. However, these studies have varied in size and methods, and few large studies assessed HLA class I alleles. Only one study conducted high-resolution class I genotyping. The current investigation therefore involved high-resolution HLA class I and II genotyping of a large multiracial cohort of U.S. women with a high prevalence of HCV and HIV. Our primary analyses evaluated associations between 12 HLA alleles identified through a critical review of the literature and HCV viremia in 758 HCV-seropositive women. Other alleles with >5% prevalence were also assessed; previously unreported associations were corrected for multiple comparisons. DRB1*0101 (prevalence ratio [PR] = 1.7; 95% confidence interval [CI] = 1.1-2.6), B*5701 (PR=2.0; 95% CI = 1.0-3.1), B*5703 (PR = 1.7; 95% CI = 1.0-2.5), and Cw*0102 (PR = 1.9; 95% CI = 1.0-3.0) were associated with the absence of HCV RNA (i.e., HCV clearance), whereas DRB1*0301 (PR = 0.4; 95% CI = 0.2-0.7) was associated with HCV RNA positivity. DQB1*0301 was also associated with the absence of HCV RNA but only among HIV-seronegative women (PR = 3.4; 95% CI = 1.2-11.8). Each of these associations was among those predicted. We additionally studied the relation of HLA alleles with HCV infection (serostatus) in women at high risk of HCV from injection drug use (N = 838), but no significant relationships were observed. CONCLUSION HLA genotype influences the host capacity to clear HCV viremia. The specific HLA associations observed in the current study are unlikely to be due to chance because they were a priori hypothesized.
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Affiliation(s)
- Mark H Kuniholm
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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O'Rielly DD, Rahman P. Pharmacogenetics of rheumatoid arthritis: Potential targets from susceptibility genes and present therapies. PHARMACOGENOMICS & PERSONALIZED MEDICINE 2010; 3:15-31. [PMID: 23226040 PMCID: PMC3513198 DOI: 10.2147/pgpm.s5012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Indexed: 01/29/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic heterogeneous autoimmune disorder of unknown etiology resulting in inflammation in the synovium, cartilage, and bone. Genetic factors play an important role in susceptibility to RA as the heritability of RA is between 50% and 60%, with the human leukocyte antigen (HLA) locus accounting for at least 30% of overall genetic risk. Outside the major histocompatibility complex (MHC) region, six additional risk loci have been identified and validated including PTPN22, STAT4, PADI4, CTLA4, TNFAIP3-OLIG3, and TRAF1/C5. Genetic factors are also important in RA pharmacotherapy due to the gene-dependent activity of enzymes involved in the pharmacokinetics and/or pharmacodynamics of RA medications. Indeed, there is great variability in drug efficacy as well as adverse events associated with any anti-rheumatic therapy and genetics is thought to contribute significantly to this inter-individual variability in response. This review will summarize the genetic factors that have been implicated in the pathogenesis of RA, and how these determinants may factor into the potential pharmacogenetics of this disease. We will also review the therapeutic agents that are currently being utilized or presently being evaluated in the treatment of RA, along with potential pharmacogenetic markers that have been proposed for such medications.
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Affiliation(s)
- Darren D O'Rielly
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
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Lee HS, Korman BD, Le JM, Kastner DL, Remmers EF, Gregersen PK, Bae SC. Genetic risk factors for rheumatoid arthritis differ in Caucasian and Korean populations. ACTA ACUST UNITED AC 2009; 60:364-71. [PMID: 19180477 DOI: 10.1002/art.24245] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Recent studies have identified a number of novel rheumatoid arthritis (RA) susceptibility loci in Caucasian populations. The aim of this study was to determine whether the genetic variants at 4q27, 6q23, CCL21, TRAF1/C5, and CD40 identified in Caucasians are also associated with RA in a Korean case-control collection. We also comprehensively evaluated the genetic variation within PTPN22, a well-established autoimmune disease-associated gene. METHODS We designed an experiment to thoroughly evaluate the PTPN22 linkage disequilibrium region, using tag single-nucleotide polymorphisms (SNPs) and disease-associated SNPs at 5 RA-associated loci recently identified in Caucasians, in 1,128 Korean patients with RA and 1,022 ethnically matched control subjects. We also resequenced the PTPN22 gene to seek novel coding variants that might be contributing to disease in this population. RESULTS None of the susceptibility loci identified in Caucasian patients with RA contributed significantly to disease in Koreans. Although tag SNPs covering the PTPN22 linkage disequilibrium block were polymorphic, they did not reveal any disease association, and resequencing did not identify any new common coding region variants in this population. The 6q23 and 4q27 SNPs assayed were nonpolymorphic in this population, and the TRAF1/C5, CD40, and CCL21 SNPs did not show any evidence for association with RA in this population of Korean patients. CONCLUSION The genetic risk factors for RA are different in Caucasian and Korean patients. Although patients of different ethnic groups share the HLA region as a major genetic risk locus, most other genes shown to be significantly associated with disease in Caucasians appear not to play a role in Korean patients with RA.
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Affiliation(s)
- Hye-Soon Lee
- Hanyang University College of Medicine and the Hospital for Rheumatic Diseases, Seoul, South Korea
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Rak JM, Maestroni L, Balandraud N, Guis S, Boudinet H, Guzian MC, Yan Z, Azzouz D, Auger I, Roudier C, Martin M, Didelot R, Roudier J, Lambert NC. Transfer of the shared epitope through microchimerism in women with rheumatoid arthritis. ACTA ACUST UNITED AC 2009; 60:73-80. [PMID: 19117368 DOI: 10.1002/art.24224] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Rheumatoid arthritis (RA) is an autoimmune disease that affects mostly women and is associated with HLA-DRB1 genes having in common a shared epitope sequence. In parallel, cells and/or DNA originating from pregnancy (microchimerism) persist for decades and could contribute to autoimmunity. The aim of this study was to examine whether microchimerism may be a source of the shared epitope among women with RA. METHODS Women with RA and healthy women who lacked RA-associated genes such as HLA-DRB1*01 (n=33 and n=46, respectively) and/or HLA-DRB1*04 (n=48 and n=64, respectively), were tested for DRB1*01 or DRB1*04 microchimerism by HLA-specific quantitative polymerase chain reaction assays. As controls, alleles not associated with RA (DQB1*02 and DRB1*15/16) were also analyzed. RESULTS Compared with healthy women, women (42% with RA had a higher frequency and higher levels of DRB1*04 microchimerism versus 8%; P=0.00002) as well as DRB1*01 microchimerism (30% versus 4%; P=0.0015). Moreover, no difference in microchimerism was observed for alleles not associated with RA. CONCLUSION Women with RA had microchimerism with RA-associated HLA alleles, but not with non-RA-associated HLA alleles, more often and at higher levels compared with healthy women. These observations are the first to indicate that microchimerism can contribute to the risk of an autoimmune disease by providing HLA susceptibility alleles.
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Affiliation(s)
- J M Rak
- INSERM U639, Marseille, France
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