1
|
Arleevskaya MI, Larionova RV, Shagimardanova EI, Gogoleva NE, Kravtsova OA, Novikov AA, Kazarian GG, Carlé C, Renaudineau Y. Predictive risk factors before the onset of familial rheumatoid arthritis: the Tatarstan cohort study. Front Med (Lausanne) 2023; 10:1227786. [PMID: 37877020 PMCID: PMC10593450 DOI: 10.3389/fmed.2023.1227786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/14/2023] [Indexed: 10/26/2023] Open
Abstract
Background A familial history of rheumatoid arthritis (RA) predisposes an individual to develop RA. This study aimed at investigating factors associated with this conversion from the Tatarstan cohort. Methods A total of 144 individuals, referred to as pre-RA and at risk for familial RA, were selected 2 years (range: 2-21 years) before conversion to RA and compared to non-converted 328 first-degree relatives (FDR) from RA as assessed after ≥2 years follow-up, and 355 healthy controls were also selected (HC). Preclinical parameters and socio-demographic/individual/HLA genetic factors were analyzed when data were available at the time of enrollment. Results As compared to FDR and HC groups, pre-RA individuals were characterized before conversion to RA by the presence of arthralgia, severe morning symptoms, a lower educational level, and rural location. An association with the HLA-DRB1 SE risk factor was also retrieved with symmetrical arthralgia and passive smoking. On the contrary, alcohol consumption and childlessness in women were protective and associated with the HLA-DRB1*07:01 locus. Conclusion Before RA onset, a combination of individual and genetic factors characterized those who are at risk of progressing to RA among those with familial RA relatives.
Collapse
Affiliation(s)
- Marina I. Arleevskaya
- Central Research Laboratory, Kazan State Medical Academy, Kazan, Russia
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia
| | - Regina V. Larionova
- Central Research Laboratory, Kazan State Medical Academy, Kazan, Russia
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia
| | - Elena I. Shagimardanova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia
| | - Natalia E. Gogoleva
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia
| | - Olga A. Kravtsova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia
| | - Andrej A. Novikov
- Innovation Department, Sobolev Institute of Mathematics, Siberian Brunch of Russian Academy of Science, Novosibirsk, Russia
- Immunology Department Laboratory, Institut Fédératif de Biologie, Toulouse University Hospital Center, Toulouse, France
- INFINITy, Toulouse Institute for Infectious and Inflammatory Diseases, INSERM U1291, CNRS U5051, University Toulouse III, Toulouse, France
| | | | - Caroline Carlé
- Immunology Department Laboratory, Institut Fédératif de Biologie, Toulouse University Hospital Center, Toulouse, France
- INFINITy, Toulouse Institute for Infectious and Inflammatory Diseases, INSERM U1291, CNRS U5051, University Toulouse III, Toulouse, France
| | - Yves Renaudineau
- Immunology Department Laboratory, Institut Fédératif de Biologie, Toulouse University Hospital Center, Toulouse, France
- INFINITy, Toulouse Institute for Infectious and Inflammatory Diseases, INSERM U1291, CNRS U5051, University Toulouse III, Toulouse, France
| |
Collapse
|
2
|
Ali AA, Khalid KE, Hussien HM, Mohammed SE, Saeed OK. The Association of Human Leukocyte Antigen Genotyping Among Sudanese Patients With Rheumatoid Arthritis: Reference to Ethnicity. Cureus 2023; 15:e43905. [PMID: 37746389 PMCID: PMC10512431 DOI: 10.7759/cureus.43905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2023] [Indexed: 09/26/2023] Open
Abstract
INTRODUCTION Human leukocyte antigens (HLA) account for up to one-half of the total genetic contribution to rheumatoid arthritis (RA) risk. The study investigated the association of HLA class II genotyping with RA susceptibility in Sudanese ethnic groups. METHODS The DRB1 and DQB1 alleles and haplotypes were determined in 122 RA patients (i.e., Gaalia = 54, Johayna = 24, Baggara = 17, Nile Nubian = 12, and others = 15) and 120 healthy controls of ethnic groups (i.e., Gaalia = 44, Johayna = 11, Baggara = 15, Nile Nubian = 9, and others = 21) using a polymerase chain reaction with sequence-specific primers method. RESULTS Susceptibility to RA was associated with a high frequency of DRB1*04 (P = 0.04), DRB1*10 (P = 0.04), and DQB1*03 (P = 2.2 x 10-8/Pc = 6.6 x 10-8) between study ethnic groups, while protective effects were shown with DRB1*07 (P = 0.01), DQB1*02 (P = 0.02), and DQB1*06 (P = 2.2 x 10-6/Pc = 6.6 x 10-6), with an inconsistent frequency between study ethnic groups. The HLA haplotypes that were high in frequency among RA ethnic groups and showed susceptibility associations were DRB1*03-DQB1*03, DRB1*04-DQB1*03, DRB1*08-DQB1*03, DRB1*13-DQB1*02, and DRB1*13-DQB1*03 (P = 0.00003/Pc = 0.0003, P = 0.0001/Pc = 0.0001, P = 0.03, P = 0.004/Pc = 0.03, and P = 3.79x10-8/Pc = 3.3x10-9, respectively). On the contrary, DRB1*03-DQB1*02, DRB1*07-DQB1*02, and DRB1*13-DQB1*06 were lower in frequency in the ethnic groups with RA and may confer protection (P = 0.004/Pc = 0.032, P = 0.002/Pc = 0.02, and P = 0.01, respectively). CONCLUSIONS Our findings indicate an association between HLA-DRB1 and DQB1 genotypes and the susceptibility to RA in the Sudanese population, with a moderate frequency between our ethnic groups.
Collapse
Affiliation(s)
- Adil A Ali
- Department of Biochemistry and Nutrition, Faculty of Medicine, University of Gezira, Wad Medani, SDN
| | - Khalid E Khalid
- Department of Basic Medical Sciences, Faculty of Applied Medical Sciences, Albaha University, Al-Baha, SAU
| | - Hajir M Hussien
- Department of Medical Microbiology, Faculty of Medical Laboratory Sciences, University of Gezira, Wad Medani, SDN
| | - Somaya E Mohammed
- Department of Pathology, Faculty of Medicine, University of Gezira, Wad Medani, SDN
| | - Osman K Saeed
- Department of Internal Medicine, Faculty of Medicine, University of Gezira, Wad Medani, SDN
| |
Collapse
|
3
|
Ali AA, Khalid KE, Mohammed SE, Akhtar MS, Saeed OK. Association of Human Leukocyte Antigen (HLA) class II ( DRB1 and DQB1) alleles and haplotypes with Rheumatoid Arthritis in Sudanese patients. Front Immunol 2023; 14:1178546. [PMID: 37426636 PMCID: PMC10324672 DOI: 10.3389/fimmu.2023.1178546] [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: 03/02/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
The aim of this study was to determine the Human Leukocyte Antigen (HLA) class II (DRB1 and DQB1) alleles and haplotype frequency in Rheumatoid Arthritis (RA) in the Sudanese population. The frequency of HLA-DRB1 and -DQB1 alleles and DRB1-DQB1 haplotypes were determined in 122 RA patients and 100 controls. HLA alleles were genotyped by the polymerase chain reaction-sequence specific primers (PCR-SSP) method. In RA patients, HLA-DRB1*04 and *10 alleles were high in frequency (9.6% vs 14.2%, P = 0.038 and P = 0.042, respectively), and dependently on anti-citrullinated protein antibodies (ACPAs) seropositivity (P = 0.044 and P = 0.027, respectively). In contrast, the frequency of the HLA-DRB1*07 allele was significantly low in patients than in controls (11.7% vs 5.0%, P = 0.010). Moreover, the HLA-DQB1*03 allele was strongly associated with RA risk (42.2%, P = 2.2x10-8), whereas, HLA-DQB1*02 and *06 showed protective effects against RA (23.1% and 42.2%, P = 0.024 and P = 2.2x10-6, respectively). Five different HLA haplotypes, DRB1*03-DQB1*03 (P = 0.00003), DRB1*04-DQB1*03 (P = 0.00014), DRB1*08-DQB1*03 (P = 0.027), DRB1*13-DQB1*02 (P = 0.004), and DRB1*13-DQB1*03 (P = 3.79x10-8) were significantly associated with RA risk, while 3 protective haplotypes, DRB1*03-DQB1*02 (Pc = 0.008), DRB1*07-DQB1*02 (Pc = 0.004), and DRB1*13-DQB1*06 (Pc = 0.02) were identified. This is the first study determining the association between HLA class II alleles and haplotypes and RA risk in our population.
Collapse
Affiliation(s)
- Adil Ahmed Ali
- Department of Biochemistry and Nutrition, Faculty of Medicine, University of Gezira, Wad Medani, Sudan
| | - Khalid Eltahir Khalid
- Department of Biochemistry and Nutrition, Faculty of Medicine, University of Gezira, Wad Medani, Sudan
- Department of Basic Medical Sciences, Faculty of Applied Medical Sciences, Al-Baha University, Al-Baha, Saudi Arabia
| | - Somaya Elhaj Mohammed
- Department of Pathology, Faculty of Medicine, University of Gezira, Wad Medani, Sudan
| | - Mohammed Salman Akhtar
- Department of Basic Medical Sciences, Faculty of Applied Medical Sciences, Al-Baha University, Al-Baha, Saudi Arabia
| | - Osman Khalafalla Saeed
- Department of Internal Medicine, Faculty of Medicine, University of Gezira, Wad Medani, Sudan
| |
Collapse
|
4
|
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.
Collapse
|
5
|
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
| | | |
Collapse
|
6
|
Manasson J, Shen N, Garcia Ferrer HR, Ubeda C, Iraheta I, Heguy A, Von Feldt JM, Espinoza LR, Garcia Kutzbach A, Segal LN, Ogdie A, Clemente JC, Scher JU. Gut Microbiota Perturbations in Reactive Arthritis and Postinfectious Spondyloarthritis. Arthritis Rheumatol 2018; 70:242-254. [PMID: 29073348 DOI: 10.1002/art.40359] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 10/19/2017] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Reactive arthritis (ReA) is an inflammatory disorder occurring several weeks after gastrointestinal or genitourinary tract infections. HLA-B27 positivity is considered a risk factor, although it is not necessarily predictive of disease incidence. Among nongenetic factors, the intestinal microbiome may play a role in disease susceptibility. The objective of this study was to characterize the gut microbiota and host gene interactions in ReA and postinfectious spondyloarthritis. METHODS Adult subjects with peripheral spondyloarthritis and control subjects with preceding infections who did not develop arthritis were prospectively recruited from a geographic region with a high prevalence of ReA. Clinical variables, HLA status, and 16S ribosomal RNA gene sequencing of intestinal microbiota were analyzed. RESULTS Subjects with ReA showed no significant differences from controls in gut bacterial richness or diversity. However, there was a significantly higher abundance of Erwinia and Pseudomonas and an increased prevalence of typical enteropathogens associated with ReA. Subjects with ultrasound evidence of enthesitis were enriched in Campylobacter, while subjects with uveitis and radiographic sacroiliitis were enriched in Erwinia and unclassified Ruminococcaceae, respectively; both were enriched in Dialister. Host genetics, particularly HLA-A24, were associated with differences in gut microbiota diversity irrespective of disease status. We identified several co-occurring taxa that were also predictive of HLA-A24 status. CONCLUSION This is the first culture-independent study characterizing the gut microbial community in postinfectious arthritis. Although bacterial factors correlated with disease presence and clinical features of ReA, host genetics also appeared to be a major independent driver of intestinal community composition. Understanding of these gut microbiota-host genetic relationships may further clarify the pathogenesis of postinfectious spondyloarthritides.
Collapse
Affiliation(s)
- Julia Manasson
- New York University School of Medicine and Hospital for Joint Diseases, New York, New York
| | - Nan Shen
- Icahn School of Medicine at Mount Sinai, New York, New York
| | - Helga R Garcia Ferrer
- Guatemalan Association Against Rheumatic Diseases and Universidad Francisco Marroquin, Guatemala City, Guatemala
| | - Carles Ubeda
- Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana, Valencia, Spain, and CIBER en Epidemiologia y Salud Publica, Madrid, Spain
| | - Isa Iraheta
- Guatemalan Association Against Rheumatic Diseases and Universidad Francisco Marroquin, Guatemala City, Guatemala
| | - Adriana Heguy
- New York University School of Medicine, New York, New York
| | | | - Luis R Espinoza
- Louisiana State University Health Science Center, New Orleans
| | - Abraham Garcia Kutzbach
- Guatemalan Association Against Rheumatic Diseases and Universidad Francisco Marroquin, Guatemala City, Guatemala
| | | | | | | | - Jose U Scher
- New York University School of Medicine and Hospital for Joint Diseases, New York, New York
| |
Collapse
|
7
|
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]
|
8
|
TMEM187-IRAK1 Polymorphisms Associated with Rheumatoid Arthritis Susceptibility in Tunisian and French Female Populations: Influence of Geographic Origin. J Immunol Res 2017; 2017:4915950. [PMID: 28271077 PMCID: PMC5320318 DOI: 10.1155/2017/4915950] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 12/21/2016] [Accepted: 12/28/2016] [Indexed: 12/12/2022] Open
Abstract
Polymorphisms have been identified in the Xq28 locus as risk loci for rheumatoid arthritis (RA). Here, we investigated the association between three polymorphisms in the Xq28 region containing TMEM187 and IRAK1 (rs13397, rs1059703, and rs1059702) in two unstudied populations: Tunisian and French. The rs13397 G and rs1059703 T major alleles were significantly increased in RA patients (n = 408) compared with age-matched controls (n = 471) in both Tunisian and French women. These results were confirmed by a meta-analysis replication study including two independent Greek and Korean cohorts. The rs1059702 C major allele was significantly associated with RA, only with French women. In the French population, the GTC haplotype displayed a protective effect against RA, while the ATC, GCC, and GTT haplotypes conferred significant risk for RA. No association for these haplotypes was found in the Tunisian population. Our results replicated for the first time the association of the three Xq28 polymorphisms with RA risk in Tunisian and French populations and suggested that RA susceptibility is associated with TMEM187-IRAK1 polymorphisms in women. Our data further support the involvement of X chromosome in RA susceptibility and evidence ethnicities differences that might be explained by differences in the frequencies of SE HLA-DRB1 alleles between both populations.
Collapse
|
9
|
Bhallil O, Ibrahimi A, Ouadghiri S, Ouzeddoun N, Benseffaj N, Bayahia R, Essakalli M. HLA Class II with Lupus Nephritis in Moroccan Patients. Immunol Invest 2016; 46:1-9. [DOI: 10.1080/08820139.2016.1208218] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
10
|
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
| |
Collapse
|
11
|
Bizzari S, Nair P, Al Ali MT, Hamzeh AR. Meta-analyses of the association of HLA-DRB1 alleles with rheumatoid arthritis among Arabs. Int J Rheum Dis 2016; 20:832-838. [PMID: 27412376 DOI: 10.1111/1756-185x.12922] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
AIM Various studies incorporating Arab populations have reported on specific associations between HLA-DRB1 variants and rheumatoid arthritis (RA). We sought to provide an overview on the association of HLA-DRB1 with RA in Arabs using meta-analysis tools. METHODS Data on allele counts and frequencies were compiled from the relevant literature (published before 16 February 2016) and the associations of 13 -DRB1 variants with RA were assessed; relationships were defined in terms of odds ratios (ORs) with a 95% confidence interval. RESULTS Based on a collection of six studies, risk conferring or protective allele associations were derived from allele counts in 475 RA patients and 1213 controls. Two HLA-DRB1 alleles (-DRB1*04, *10) significantly conferred an increased risk for RA (OR > 2; P < 0.0001). Conversely, four alleles (-DRB1*03, *07, *11 and *13) significantly conferred a protective effect against RA (OR < 1; P < 0.05). No significant associations with RA were found for seven -DRB1 variants (-DRB1*01, *08, *09, *12, *14, *15 and *16). CONCLUSION With increased statistical power and effect size over individual studies, we present a more robust profile on the association of HLA-DRB1 variants with RA in the Arab ethnicity, and contribute to the global geo-ethnic picture in this context.
Collapse
Affiliation(s)
- Sami Bizzari
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Pratibha Nair
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | | | | |
Collapse
|
12
|
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
| |
Collapse
|
13
|
Brick C, Atouf O, Essakalli M. [The HLA system in the Moroccan population: General review]. Transfus Clin Biol 2015; 22:299-311. [PMID: 26597780 DOI: 10.1016/j.tracli.2015.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 10/15/2015] [Indexed: 01/11/2023]
Abstract
The Moroccan population is an interesting study model of Human Leukocyte Antigen (HLA) polymorphism given its ethnic and genetic diversity. Through an analysis of the literature, this work proposes to establish a balance of knowledge for this population in the field of histocompatibility: HLA diversity, anthropology, transplantation and HLA associations and diseases. This analysis shows that the HLA system has not been fully explored within the Moroccan population. However, the results obtained allowed us to initiate a database reflecting the specific healthy Moroccan population HLA polymorphism to identify immigration flows and relationships with different people of the world and to reveal the association of certain HLA alleles with frequent pathologies. We also propose to analyze the reasons hindering the development of this activity in Morocco and we will try to identify some perspectives.
Collapse
Affiliation(s)
- C Brick
- Unité d'immunologie, service de transfusion sanguine et d'hémovigilance, hôpital des Enfants de Rabat, CHU Ibn Sina Rabat, Rabat, Maroc.
| | - O Atouf
- Unité d'immunologie, service de transfusion sanguine et d'hémovigilance, hôpital des Enfants de Rabat, CHU Ibn Sina Rabat, Rabat, Maroc
| | - M Essakalli
- Unité d'immunologie, service de transfusion sanguine et d'hémovigilance, hôpital des Enfants de Rabat, CHU Ibn Sina Rabat, Rabat, Maroc; UPR d'immunologie, faculté de médecine et de pharmacie, université Mohamed V Souissi, Rabat, Maroc
| |
Collapse
|
14
|
Brick C, Atouf O, Bouayad A, Essakalli M. Moroccan study of HLA (-A, -B, -C, -DR, -DQ) polymorphism in 647 unrelated controls: Updating data. Mol Cell Probes 2015; 29:197-207. [PMID: 25952615 DOI: 10.1016/j.mcp.2015.04.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 04/10/2015] [Accepted: 04/23/2015] [Indexed: 11/28/2022]
Abstract
The scope of this study is to investigate the HLA (Human Leukocyte Antigen) distribution and polymorphism in a large sample of healthy Moroccans in order to extend and update the available data. 647 unrelated Moroccan controls originating from diverse regions of the country were typed using microlymphocytotoxicity for HLA-A and -B, sequence-specific-primer amplification for -C, -DR, and -DQ and Luminex HD for specific -DR. The most frequent allele groups detected were HLA-A2 (19.2%), -B44 (12.4%), -C*07 (24.4%), -DRB1*03 (16.9%), -DRB1*04 (18.4%), -DQB1*02 (28.7%) and -DQB1*03 (27.8%). The most predominant specific alleles found for DRB1 were: *03:01, *04:02, *04:05, *07:01, *11:01, *13:02 and *15:01. Rare allelic variants were detected, for the first time in Moroccan population, at the DRB1*03 (*03:52, *03:54, *03:56), DRB1*07 (*07:07, *07:11, *07:16) and DRB1*11 (*11:70) locus. The most frequent haplotypes were: A2-B44, A30-B18, A2-C*16, A30-C*06, B14-C*08, B58-C*07, B45-C*06, DRB1*03-DQB1*02, DRB1*04-DQB1*03, DRB1*07-DQB1*02 and DRB1*15-DQB1*06. Comparison of genetic distances and haplotypes with other populations shows that the Moroccans are genetically closer to North Africans and Europeans than to sub-Saharan Africans. Our results reflect the high degree of HLA polymorphism in the Moroccan population and provide a useful baseline of healthy Moroccan controls for disease association and anthropological studies.
Collapse
Affiliation(s)
- Chehrazade Brick
- Department of Immunology and Transfusion, CHU Ibn Sina Rabat, Morocco.
| | - Ouafa Atouf
- Department of Immunology and Transfusion, CHU Ibn Sina Rabat, Morocco.
| | | | - Malika Essakalli
- Department of Immunology and Transfusion, CHU Ibn Sina Rabat, Morocco; UPR of Immunology, Faculty of Medicine and Pharmacy, University Mohamed V Souissi, Rabat, Morocco.
| |
Collapse
|
15
|
Saad MN, Mabrouk MS, Eldeib AM, Shaker OG. Identification of rheumatoid arthritis biomarkers based on single nucleotide polymorphisms and haplotype blocks: A systematic review and meta-analysis. J Adv Res 2015; 7:1-16. [PMID: 26843965 PMCID: PMC4703421 DOI: 10.1016/j.jare.2015.01.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 01/13/2015] [Accepted: 01/20/2015] [Indexed: 12/30/2022] Open
Abstract
Genetics of autoimmune diseases represent a growing domain with surpassing biomarker results with rapid progress. The exact cause of Rheumatoid Arthritis (RA) is unknown, but it is thought to have both a genetic and an environmental bases. Genetic biomarkers are capable of changing the supervision of RA by allowing not only the detection of susceptible individuals, but also early diagnosis, evaluation of disease severity, selection of therapy, and monitoring of response to therapy. This review is concerned with not only the genetic biomarkers of RA but also the methods of identifying them. Many of the identified genetic biomarkers of RA were identified in populations of European and Asian ancestries. The study of additional human populations may yield novel results. Most of the researchers in the field of identifying RA biomarkers use single nucleotide polymorphism (SNP) approaches to express the significance of their results. Although, haplotype block methods are expected to play a complementary role in the future of that field.
Collapse
Affiliation(s)
- Mohamed N Saad
- Biomedical Engineering Department, Faculty of Engineering, Misr University for Science and Technology, 6th of October City, Egypt
| | - Mai S Mabrouk
- Biomedical Engineering Department, Faculty of Engineering, Misr University for Science and Technology, 6th of October City, Egypt
| | - Ayman M Eldeib
- Systems and Biomedical Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt
| | - Olfat G Shaker
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| |
Collapse
|
16
|
Al-Timimi DJ, Rasool MT, Sulaiman DM. HLA-DR/DQ Genotypes in Kurd Patients with Rheumatoid Arthritis: Relation to Disease Activity. J Clin Diagn Res 2014; 8:CC01-4. [PMID: 24995169 DOI: 10.7860/jcdr/2014/8112.4349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Accepted: 02/16/2014] [Indexed: 11/24/2022]
Abstract
BACKGROUND Specific alleles present at the HLA-DR/DQ loci seem to be associated with disease activity of rheumatoid arthritis. AIM In the present study, our aim was to investigate the distribution of HLA-DR/DQ alleles among Kurd patients with rheumatoid arthritis and to ascertain their relationship with disease activity. MATERIALS AND METHODS Sixty five patients with rheumatoid arthritis (RA) and 65 apparently healthy subjects participated in the study. Diagnosis and disease activity were confirmed. Blood analyses, including those of laboratory markers of disease activity, were done. The 28 joint disease activity score (DAS-28) was calculated. HLA-DR/DQ typing was performed by polymerase chain reaction (PCR).The association between HLA-DR/DQ genotypes and disease activity was determined. RESULTS The most frequent alleles which were identified in RA patients were HLA-DRBI*01(23.1%) and HLA-DQBI*6(34.6%), whereas in healthy subjects, they were HLA-DRBI*11(17.7%) and HLA-DQBI*03(35.4%). Patients with active disease had high frequencies of HLA-DQBI*6 (40.0%) as compared to those with moderate disease activity (16.7%); OR=3.33. Patients with severe RA had increased frequencies of HLA-DQBI*6 (56.3%) as compared to those with mild RA (10.0%); OR = 11.57. Patients with positive rheumatoid factor (RF) and positive Anti-citrullinated peptide antibody (Anti-CCP), also had high frequencies of HLA-DQBI*06 (38.4% and 39.4%) as compared to frequencies of 11.1% and 15.4% which were seen in patients with negative rheumatoid factor and negative anti-CCP (OR= 4.98 and3.10) respectively. CONCLUSION HLA-DQBI*06 was found to be more common in Kurd patients and it was significantly associated with disease activity; this may indicate a high risk for developing a more progressive type of the disease.
Collapse
Affiliation(s)
- Dhia J Al-Timimi
- Professor, Department of Clinical Biochemistry, College of Medicine, University of Duhok , Duhok, Kurdistan Region, Iraq
| | - Mohammad T Rasool
- Assistant Professor, Department of General Medicine, Duhok Center for Rheumatic Disease and Medical Rehabilitation , Duhok, Kurdistan Region, Iraq
| | - Dhia M Sulaiman
- Lecturer, Department of Clinical Biochemistry, College of Medicine, University of Duhok , Duhok, Kurdistan Region, Iraq
| |
Collapse
|
17
|
Djidjik R, Allam I, Douaoui S, Meddour Y, Cherguelaîne K, Tahiat A, Raaf N, Abdessemed A, Khaldoun N, Bahaz N, Chaib S, Ladjouze-Rezig A, Ghaffor M. Association study of human leukocyte antigen-DRB1 alleles with rheumatoid arthritis in Algerian patients. Int J Rheum Dis 2014; 20:1993-1997. [PMID: 24447879 DOI: 10.1111/1756-185x.12272] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
INTRODUCTION Rheumatoid arthritis (RA) is a chronic, systemic, inflammatory and multifactorial disease. Genetic predisposition seems to play an important role. The aim of this study is to explore the relationship between human leukocyte antigen (HLA)-DRB1 alleles and susceptibility, clinical and biological features of RA in an Algerian patient population. METHODS Using polymerase chain reaction - sequence specific primers (SSP), 134 RA patients and 132 healthy controls were genotyped for HLA-DRB1 and HLA-DRB1*04 subtypes. RESULTS HLA-DRB1*04 was found to have increased frequency in the RA group compared to controls (P < 0.001, OR = 3.14), and was associated with anti-citrullinated protein antibodies positivity (ACPA) (P = 0.01, OR = 2.35). In contrast, HLA-DRB1*07 was found to have a decreased frequency in patients compared to controls (P = 0.003, OR = 0.44) and significant decrease was observed in patients with the rheumatoid factor (RF) positivity subgroup (P = 0.009, OR = 0.29). HLA-DRB1*04:05 was associated with RA (P = 0.005, OR = 3.41), whereas, HLA-DRB1*04:02 showed a protective effect against RA (P = 0.003, OR = 0.20). CONCLUSIONS HLA-DRB1*04 was associated with increased risk for RA and ACPA positivity, while HLA-DRB1*07 was associated with reduced risk for RA and RF synthesis in Algerian patients.
Collapse
Affiliation(s)
- Réda Djidjik
- Department of Immunology, CHU Béni-Messous, Algiers, Algeria
| | - Ines Allam
- Department of Immunology, CHU Béni-Messous, Algiers, Algeria
| | - Sanaa Douaoui
- Department of Immunology, CHU Béni-Messous, Algiers, Algeria
| | - Yanis Meddour
- Department of Immunology, Central Hospital of Army, Algiers, Algeria
| | | | - Azzedine Tahiat
- Department of Immunology, CHU Béni-Messous, Algiers, Algeria
| | - Nabil Raaf
- Department of Immunology, CHU Béni-Messous, Algiers, Algeria
| | | | | | - Naima Bahaz
- Department of Rheumatology, CHU Béni-Messous, Algiers, Algeria
| | - Samia Chaib
- Department of Immunology, Central Hospital of Army, Algiers, Algeria
| | | | - Mohamed Ghaffor
- Department of Immunology, CHU Béni-Messous, Algiers, Algeria
| |
Collapse
|
18
|
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.
Collapse
|
19
|
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
|
20
|
Viatte S, Flynn E, Lunt M, Barnes J, Singwe-Ngandeu M, Bas S, Barton A, Gabay C. Investigation of Caucasian rheumatoid arthritis susceptibility loci in African patients with the same disease. Arthritis Res Ther 2012; 14:R239. [PMID: 23121884 PMCID: PMC3674592 DOI: 10.1186/ar4082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 10/30/2012] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION The largest genetic risk to develop rheumatoid arthritis (RA) arises from a group of alleles of the HLA DRB1 locus ('shared epitope', SE). Over 30 non-HLA single nucleotide polymorphisms (SNPs) predisposing to disease have been identified in Caucasians, but they have never been investigated in West/Central Africa. We previously reported a lower prevalence of the SE in RA patients in Cameroon compared to European patients and aimed in the present study to investigate the contribution of Caucasian non-HLA RA SNPs to disease susceptibility in Black Africans. METHODS RA cases and controls from Cameroon were genotyped for Caucasian RA susceptibility SNPs using Sequenom MassArray technology. Genotype data were also available for 5024 UK cases and 4281 UK controls and for 119 Yoruba individuals in Ibadan, Nigeria (YRI, HapMap). A Caucasian aggregate genetic-risk score (GRS) was calculated as the sum of the weighted risk-allele counts. RESULTS After genotyping quality control procedures were performed, data on 28 Caucasian non-HLA susceptibility SNPs were available in 43 Cameroonian RA cases and 44 controls. The minor allele frequencies (MAF) were tightly correlated between Cameroonian controls and YRI individuals (correlation coefficient 93.8%, p = 1.7E-13), and they were pooled together. There was no correlation between MAF of UK and African controls; 13 markers differed by more than 20%. The MAF for markers at PTPN22, IL2RA, FCGR2A and IL2/IL21 was below 2% in Africans. The GRS showed a strong association with RA in the UK. However, the GRS did not predict RA in Africans (OR = 0.71, 95% CI 0.29 - 1.74, p = 0.456). Random sampling from the UK cohort showed that this difference in association is unlikely to be explained by small sample size or chance, but is statistically significant with p<0.001. CONCLUSIONS The MAFs of non-HLA Caucasian RA susceptibility SNPs are different between Caucasians and Africans, and several polymorphisms are barely detectable in West/Central Africa. The genetic risk of developing RA conferred by a set of 28 Caucasian susceptibility SNPs is significantly different between the UK and Africa with p<0.001. Taken together, these observations strengthen the hypothesis that the genetic architecture of RA susceptibility is different in different ethnic backgrounds.
Collapse
|
21
|
Benbouazza K, Benchekroun B, Rkain H, Amine B, Bzami F, Benbrahim L, Atouf O, Essakalli M, Abouqal R, Dougados M, Hajjaj-Hassouni N. Profile and course of early rheumatoid arthritis in Morocco: a two-year follow-up study. BMC Musculoskelet Disord 2011; 12:266. [PMID: 22111841 PMCID: PMC3239294 DOI: 10.1186/1471-2474-12-266] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 11/23/2011] [Indexed: 11/10/2022] Open
Abstract
Background This study aimed to establish the profile and the evolution of an early Rheumatoid arthritis (RA) cohort in the Moroccan population and also to search possible predictor factors of structural progression. Methods Patients with early RA (< 12 months) were enrolled in a 2-year follow-up study. Clinical, biological, immunogenetic, and radiographical data were analyzed at study entry and at 24 months. Presence of radiographic progression was retained when the total score was superior to the smallest detectable difference (SDD) calculated to be 5.4 according the Sharp/van der Heijde (SVDH) method. Results Fifty one patients (88.8% women, mean age of 46.9 [ 24-72 ] ± 10.8 years, mean disease duration of 24 [ 6-48 ] ± 13.9 weeks) were enrolled in this study. 68.6% were illiterate and 19.6% reported at least one comorbid condition. The mean delay in referral for specialist care was 140 [ 7-420 ] ± 43 days. Thirteen patients (62.5%) were IgM or IgA RF positive. HLA-DRB1*01 and DRB1*04 alleles were present respectively in 11.8% and 45.1% of patients. At baseline, 35.3% patients were taking corticosteroids and 7.8% were under conventional DMARDs. At 24 months, 77.2% received a median dose of 5 mg/day of prednisone. Methotrexate (MTX) was the most frequently prescribed DMARD, being taken by 65.2% of patients. 13.6% of patients had stopped their DMARD because of socioeconomic difficulties. Comparison of clinical and biologic parameters between baseline and 24 months thereafter revealed a significant global improvement of the disease status including morning stiffness, pain score, swollen joint count, DAS 28 and HAQ scores, ESR and CRP. Sixteen patients (34.8%) were in remission at 2 years versus no patients at baseline; P < 0.001. Forteen patients (27.5%) had at least one erosion at baseline. Radiographic progression occurred in 33.3% of patients and was associated in univariate analysis to swollen joint count (p = 0.03), total SVDH score (P = 0.04) and joint space narrowing score (P = 0.03). No independent factors of radiographic progression were shown by logistic regression. Conclusions These study reports, provided for the first time in Morocco, a developing African country, a large amount of information concerning the profile and the course of early RA. Patients who were receiving, for most of them, Methotrexate in monotherapy and low doses of corticosteroids, showed an improvement of all clinic and biologic disease parameters. Moreover, DAS remission was obtained in one third of patients and two thirds of the cohort had no radiographic progression at 2 years. No predictor factors of radiographic progression were found out. These results should be confirmed or not by a large unbiased RA cohort which will give more relevant information about early RA characteristics and its course and will constitute a major keystone of its management.
Collapse
Affiliation(s)
- Karima Benbouazza
- Rheumatology department, Mohamed Vth University Souissi, Rabat, Morocco
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
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.
Collapse
Affiliation(s)
- Fahri Uçar
- Departments of Medical Biology & Genetics, Karadeniz Technical University, Trabzon, Turkey.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Bennani N, Atouf O, Benseffaj N, Brick C, Essakalli M. Polymorphisme HLA et maladie de Behçet dans la population marocaine. ACTA ACUST UNITED AC 2009; 57:403-9. [DOI: 10.1016/j.patbio.2008.09.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Accepted: 09/30/2008] [Indexed: 11/16/2022]
|