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Arnaiz-Villena A, Palacio-Grüber J, Muñiz E, Rey D, Recio MJ, Campos C, Martinez-Quiles N, Martin-Villa JM, Martinez-Laso J. HLA-DMB in Amerindians: Specific linkage of DMB*01:03:01/DRB1 alleles. Hum Immunol 2016; 77:389-94. [PMID: 26944519 DOI: 10.1016/j.humimm.2016.02.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 02/22/2016] [Accepted: 02/29/2016] [Indexed: 12/28/2022]
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Mortaz E, Sereshki HA, Abedini A, Kiani A, Mirsaeidi M, Soroush D, Garssen J, Velayati A, Redegeld FA, Adcock IM. Association of serum TNF-α, IL-8 and free light chain with HLA-DR B alleles expression in pulmonary and extra-pulmonary sarcoidosis. JOURNAL OF INFLAMMATION-LONDON 2015; 12:21. [PMID: 25866481 PMCID: PMC4393873 DOI: 10.1186/s12950-015-0066-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 03/03/2015] [Indexed: 11/23/2022]
Abstract
Background Sarcoidosis is a systemic disease of unknown etiology characterized histologically by the observation of non-caseating granulomas and several immunological abnormalities. Sarcoidosis is a multi-organ disorder which involves formation of granulomas in many tissues including the lungs (pulmonary) and others such as skin, bone, heart (extra pulmonary). Associations between human leukocyte antigens (HLA), the encoded cell surface receptor (HLA-DR) and sarcoidosis have been reported in several studies. Several HLA-DR alleles have been described as potential risk factors for sarcoidosis in distinct ethnic groups however evidence for a relationship between HLA-DR alleles and pulmonary and extra-pulmonary sarcoidosis (EPS) is still scarce. Although the etiology of the disease remains unclear, infectious and environmental factors have been postulated. Inflammatory cytokines and chemokines may play important roles in the pathogenesis of sarcoidosis and serum free light chain (FLC) numbers have been implicated in several immunologic disorders. Purpose of the study The aim of the present study was to investigate HLA associations with serum cytokines and FLC in Iranian patients with pulmonary (n = 86) and EPS (n = 46). Results We found that among the 16 HLA DRB alleles only *7 and *12 were different in sarcoidosis patients. The levels of TNF-α and IL-8 in pulmonary sarcoidosis patients were higher than in EPS (P < 0.05) whereas the levels of FLC subunits in EPS were higher than in pulmonary sarcoidosis. Conclusion This data may suggests a link between HLA-DRB *12 and sarcoidosis in Iranian population.
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Affiliation(s)
- Esmaeil Mortaz
- Department of Immunology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Sciences, Utrecht University, Utrecht, the Netherlands ; Clinical Tuberculosis and Epidemiology Research Center, National Research and Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Hale Abdoli Sereshki
- Clinical Tuberculosis and Epidemiology Research Center, National Research and Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atefeh Abedini
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arda Kiani
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Mirsaeidi
- Division of Pulmonary, Critical Care, Sleep and Allergy, University of Illinois at Chicago, Chicago, Illinois USA
| | - Dina Soroush
- Clinical Tuberculosis and Epidemiology Research Center, National Research and Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Sciences, Utrecht University, Utrecht, the Netherlands
| | - Aliakbar Velayati
- Clinical Tuberculosis and Epidemiology Research Center, National Research and Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Frank A Redegeld
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Sciences, Utrecht University, Utrecht, the Netherlands
| | - Ian M Adcock
- Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
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Sanchez ML, Katsumata K, Atsumi T, Romero FI, Bertolaccini ML, Funke A, Amengual O, Kondeatis E, Vaughan RW, Cox A, Hughes GRV, Khamashta MA. Association of HLA-DM polymorphism with the production of antiphospholipid antibodies. Ann Rheum Dis 2004; 63:1645-8. [PMID: 15547089 PMCID: PMC1754864 DOI: 10.1136/ard.2003.015552] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To investigate whether variation in the HLA-DM gene is important in producing a group of pathogenic autoantibodies-antiphospholipid antibodies (aPL)-on the basis that HLA class II restricted antigen presentation is involved in the production of aPL. METHODS HLA-DMA and DMB polymorphisms were genotyped by polymerase chain reaction combined with restriction enzyme digestion in 51 white patients with primary antiphospholipid syndrome (APS), 82 with systemic lupus erythematosus (SLE) (42 with APS and 40 without APS), and 109 healthy white controls. The association with the aPL profile was examined. RESULTS The distribution of DMA alleles in APS patients and in patients with APS associated with SLE was significantly different from that in controls by 4x2 chi(2) test with 3 degrees of freedom (p = 0.035 and 0.011, respectively), but it was not different between SLE patients without APS and controls. The allelic distribution of DMA was also different between patients with IgG class anticardiolipin antibody or those with lupus anticoagulant (LA) and controls (p = 0.012 and 0.007, respectively) and between patients with and without LA among SLE patients (p = 0.035). All these differences included the increase in DMA*0102 in the former groups. CONCLUSIONS The results suggest that HLA-DMA*0102 or its linked gene(s) form one of the genetic risks for the production of aPL.
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Affiliation(s)
- M L Sanchez
- Lupus Research Unit, The Rayne Institute, St Thomas' Hospital, London, SE1 7EH, UK
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Rossman MD, Thompson B, Frederick M, Maliarik M, Iannuzzi MC, Rybicki BA, Pandey JP, Newman LS, Magira E, Beznik-Cizman B, Monos D. HLA-DRB1*1101: a significant risk factor for sarcoidosis in blacks and whites. Am J Hum Genet 2003; 73:720-35. [PMID: 14508706 PMCID: PMC1180597 DOI: 10.1086/378097] [Citation(s) in RCA: 233] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2003] [Accepted: 06/11/2003] [Indexed: 12/27/2022] Open
Abstract
Sarcoidosis is a granulomatous disorder of unknown etiology, associated with an accumulation of CD4+ T cells and a TH1 immune response. Since previous studies of HLA associations with sarcoidosis were limited by serologic or low-resolution molecular identification, we performed high-resolution typing for the HLA-DPB1, HLA-DQB1, HLA-DRB1, and HLA-DRB3 loci and the presence of the DRB4 or DRB5 locus, to define HLA class II associations with sarcoidosis. A Case Control Etiologic Study of Sarcoidosis (ACCESS) enrolled biopsy-confirmed cases (736 total) from 10 centers in the United States. Seven hundred six (706) controls were case matched for age, race, sex, and geographic area. We studied the first 474 ACCESS patients and case-matched controls. The HLA-DRB1 alleles were differentially distributed between cases and controls (P<.0001). The HLA-DRB1*1101 allele was associated (P<.01) with sarcoidosis in blacks and whites and had a population attributable risk of 16% in blacks and 9% in whites. HLA-DRB1-F(47) was the amino acid residue most associated with sarcoidosis and independently associated with sarcoidosis in whites. The HLA-DPB1 locus also contributed to susceptibility for sarcoidosis and, in contrast to chronic beryllium disease, a non-E(69)-containing allele, HLA-DPB1*0101, conveyed most of the risk. Although significant differences were observed in the distribution of HLA class II alleles between blacks and whites, only HLA-DRB1*1501 was differentially associated with sarcoidosis (P<.003). In addition to being susceptibility markers, HLA class II alleles may be markers for different phenotypes of sarcoidosis (DRB1*0401 for eye in blacks and whites, DRB3 for bone marrow in blacks, and DPB1*0101 for hypercalcemia in whites). These studies confirm a genetic predisposition for sarcoidosis and present evidence for the allelic variation at the HLA-DRB1 locus as a major contributor.
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Affiliation(s)
- Milton D Rossman
- Pulmonary, Allergy and Critical Care Division, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, 19104, USA.
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5
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Abstract
There have been several new insights into the cause and treatment of sarcoidosis. Studies of genetic variation have shown that specific genetic polymorphisms are associated with increased risk of disease or affect disease presentation. These polymorphisms include variation of MHC and cytokines such as tumour necrosis factor (TNF). Not all investigators have come to the same conclusion, suggesting an interaction of various factors, including the patient's ethnic origin. Treatment of sarcoidosis varies considerably. Patients with symptomatic disease for more than 2-5 years have been of particular interest. Corticosteroids remain the standard of care in such cases, but immunosuppressive drugs have proved steroid-sparing in many patients. New agents, including pentoxifylline, thalidomide, and infliximab have proved useful in selected cases. The effectiveness of these agents seems to lie in their ability to block TNF, especially in the treatment of chronic disease.
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Affiliation(s)
- Robert P Baughman
- Department of Internal Medicine, University of Cincinnati, Cincinnati Medical Center, Cincinnati, OH 45267-0565, USA.
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6
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Abstract
Sarcoidosis is a granulomatous disease that has the immunopathological features of being antigen-driven. It is a complex disease that appears to arise from the interaction of one or more triggers with an immunologically predisposed host. Previous reports of familial clustering and varying prevalence of sarcoidosis in different populations could reflect differences in ethnic predisposition or differences in local environmental exposures. This review focuses specifically on these areas that have been the subjects of intensive investigation recently. Specific focus is provided on the issue of an infective trigger and highlights popular candidates. It is concluded that microbes are a likely trigger (but not as an infection) in a genetically predisposed individual and that this initial event culminates in the sarcoidosis granulomatous response.
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Affiliation(s)
- R M du Bois
- Clinical Genomics Group, Department of Occupational and Environmental Medicine, Royal Brompton Hospital and Imperial College, London, UK.
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Naruse TK, Kawata H, Inoko H, Isshiki G, Yamano K, Hino M, Tatsumi N. The HLA-DOB gene displays limited polymorphism with only one amino acid substitution. TISSUE ANTIGENS 2002; 59:512-9. [PMID: 12445321 DOI: 10.1034/j.1399-0039.2002.590608.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The HLA-DO molecule is a non-classical class II heterodimer composed of alpha and beta chains. We have previously recognized that all eight of the allelic variations of the HLA-DOA gene represent non-synonymous amino acid substitution. In the present study, to analyze genetic polymorphism and allelic variation of the HLA-DOB gene which may affect the efficiency of class II restricted antigen presentation thereby being involved in the susceptibility of HLA associated diseases, we conducted direct DNA sequencing of HLA-DOB in 36 HLA class II homozygous typing cells and identified six new allelic variations (DOB*0101101, *0101102, *01012, *01022, *0104101 and *0104102) including five single nucleotide polymorphisms with only one amino acid substitution. Furthermore, strong linkage disequilibrium was detected between DOB*01022 and DRB1*1502 only, with no linkage disequilibrium between the DOA and the DOB genes. The HLA-DOB gene has been identified in other mammals, and their nucleotide sequences are well conserved. These facts suggest that limited polymorphism in the DOB gene is profitable to execute their unique function as a co chaperone and so strong selective pressure is operating to prevent generic variation against the DOB molecule interacting with the DM molecule and thus maintaining the specified immunological function of regulating antigen presentation.
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Affiliation(s)
- T K Naruse
- Tokai University School of Medicine, Kanagawa, Japan
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Pantelidis P, Veeraraghavan S, du Bois RM. Surfactant gene polymorphisms and interstitial lung diseases. Respir Res 2002; 3:14. [PMID: 11806849 PMCID: PMC64812 DOI: 10.1186/rr163] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2001] [Revised: 08/17/2001] [Accepted: 08/31/2001] [Indexed: 11/10/2022] Open
Abstract
Pulmonary surfactant is a complex mixture of phospholipids and proteins, which is present in the alveolar lining fluid and is essential for normal lung function. Alterations in surfactant composition have been reported in several interstitial lung diseases (ILDs). Furthermore, a mutation in the surfactant protein C gene that results in complete absence of the protein has been shown to be associated with familial ILD. The role of surfactant in lung disease is therefore drawing increasing attention following the elucidation of the genetic basis underlying its surface expression and the proof of surfactant abnormalities in ILD.
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Affiliation(s)
- Panagiotis Pantelidis
- Interstitial Lung Disease Unit, Department of Occupational and Environmental Medicine, Imperial College of Science, Technology and Medicine, National Heart and Lung Institute, & Royal Brompton Hospital, London, UK.
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Schürmann M, Lympany PA, Reichel P, Müller-Myhsok B, Wurm K, Schlaak M, Müller-Quernheim J, du Bois RM, Schwinger E. Familial sarcoidosis is linked to the major histocompatibility complex region. Am J Respir Crit Care Med 2000; 162:861-4. [PMID: 10988096 DOI: 10.1164/ajrccm.162.3.9901099] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Sarcoidosis is a systemic granulomatous disorder associated with high CD4+ cell activity, but no pathogen is detectable. Clustering in families occurs, and the existence of a genetic predisposition to sarcoidosis is widely accepted. The major histocompatibility complex (MHC) is believed to contribute to this susceptibility. Many studies testing this hypothesis have produced conflicting results. We have genotyped 122 affected siblings from 55 families for seven DNA polymorphisms that flank and cover the MHC region on chromosome 6, and for HLA-DPB1, a candidate gene for granulomatous disorders. Multipoint nonparametric linkage (NPL) analysis showed linkage (NPL score > 2.5; p < 0.006) for the entire MHC region with a maximum NPL score of 3.2 (p = 0.0008) at marker locus D6S1666 in the Class III gene cluster. There was a significant excess of marker haplotype sharing among affected siblings. However, the frequency of HLA-DPB1 alleles on 104 shared chromosomes did not differ from that of a control group of founders from the family panel. Transmission disequilibrium was found for allele DPB1*0201, but only nine families contributed to this result. We conclude that genes of the MHC are involved in the genetic predisposition to sarcoidosis, but HLA-DPB1 alone does not sufficiently explain this fact.
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Affiliation(s)
- M Schürmann
- Institute of Human Genetics, Lübeck University Medical School, Lübeck, Germany.
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10
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Abstract
Major histocompatibility complex (MHC) class II molecules are cell surface proteins that present peptides to CD4(+) T cells. In addition to these wellcharacterized molecules, two other class II-like proteins are produced from the class II region of the MHC, HLA-DM (DM) and HLA-DO (DO) (called H2-M, or H2-DM and H2-O in the mouse). The function of DM is well established; it promotes peptide loading of class II molecules in the endosomal/lysosomal system by catalyzing the release of CLIP peptides (derived from the class II-associated invariant chain) in exchange for more stably binding peptides. While DM is present in all class II- expressing antigen presenting cells, DO is expressed mainly in B cells. In this cell type the majority of DM molecules are not present as free heterodimers but are instead associated with DO in tight heterotetrameric complexes. The association with DM is essential for the intracellular transport of DO, and the two molecules remain associated in the endosomal system. DO can clearly modify the peptide exchange activity of DM both in vitro and in vivo, but the physiological relevance of this interaction is still only partly understood.
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Affiliation(s)
- C Alfonso
- The R.W. Johnson Pharmaceutical Research Institute, San Diego, California 92121, USA
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11
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Kobayashi T, Yokoyama I, Inoko H, Naruse T, Hayashi S, Morozumi K, Uchida K, Nakao A. Significance of transporter associated with antigen processing gene polymorphism in living related renal transplantation. Hum Immunol 2000; 61:670-4. [PMID: 10880737 DOI: 10.1016/s0198-8859(00)00124-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The HLA class I and class II mediated antigen presentation plays a major role in the initiation of immune response and the development of acute rejection after transplantation. The purpose of this study was to examine whether MHC-encoded antigen processing (TAP1, TAP2, LMP2, DMA and DMB) gene polymorphisms were associated with the incidence and the severity of acute rejection after renal transplantation. We studied a selected population of 112 pairs of donors and recipients who underwent living-related renal transplantation. They were divided into 3 groups: rejection-free (Group A, n = 51), steroid-sensitive rejection (Group B, n = 31) and steroid-resistant rejection (Group C, n = 30). The frequency of TAP2*0103 (41.2%) was significantly higher in the donors of Group A than that of Group B (12.9%, p = 0.0070, pc = 0.0280) or Group C (16. 7%, p = 0.0225, pc = 0.0900). No significant difference was observed in the allelic frequencies of the TAP1, LMP2, DMA, and DMB genes in the donors or recipients among Groups A, B, and C. This result supported the idea that the TAP2 gene polymorphism might be functionally related to antigen presentation. It also suggested that donor's antigen presenting cells with the TAP2*0103 allele would have the attenuated efficacy in the presentation of allospecific antigens to recipient's T cells.
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Affiliation(s)
- T Kobayashi
- Department of Surgery II, Nagoya University School of Medicine, , Japan.
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12
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Naruse TK, Matsuzawa Y, Ota M, Katsuyama Y, Matsumori A, Hara M, Nagai S, Morimoto S, Sasayama S, Inoko H. HLA-DQB1*0601 is primarily associated with the susceptibility to cardiac sarcoidosis. TISSUE ANTIGENS 2000; 56:52-7. [PMID: 10958356 DOI: 10.1034/j.1399-0039.2000.560107.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cardiac sarcoidosis occurs in 1-5% of sarcoidosis patients. We previously reported a significant increase of the uncommon TNFA (tumor necrosis factor alpha) allele, TNFA2 with cardiac sarcoidosis in Japanese. In order to precisely localize the susceptible locus for cardiac sarcoidosis within the HLA region, genetic polymorphisms of classical HLA genes, non-classical HLA class II genes such as HLA-DMA and -DMB genes and several genes involved in the class I-mediated antigen presentation pathway (TAP1, TAP2, LMP2 and LMP7) were investigated. Further, association analyses using four polymorphic microsatellite markers located around the TAP1 and TNFA genes were also carried out. As a result, HLA-DQB1*0601 was found to be the most significantly associated allele, being more significantly increased than TNFA2. No significant increase of the DR52-associated DRB1 alleles (DRB1*03, 05, 06 and 08), which was suggested to be primarily associated with lung sarcoidosis, was observed in cardiac sarcoidosis. A primary role of DQB1*0601 in determination of the susceptibility to cardiac sarcoidosis was supported by association analysis using four polymorphic microsatellite markers, in which only the TAP1 microsatellite locus, the nearest marker to the DQB1 gene among the microsatellites tested, displayed a significant positive association with cardiac sarcoidosis. On the other hand, the HLA-DQB1*0501-DQA1*0101-DRB1*0101-B7 haplotype showed a negative association with the disease, as similarly observed in lung sarcoidosis. Thus, molecular mechanism for controlling the development of the disease related to HLA molecules are different between cardiac and lung sarcoidosis, whereas those for conferring a resistant trait may be similar to each other.
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Affiliation(s)
- T K Naruse
- Department of Genetic Information, Tokai University School of Medicine, Isehara Kanagawa, Japan
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13
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Affiliation(s)
- K Yabuki
- Department of Ophthalmology, Yokohama City University, School of Medicine, Kanagawa, Japan
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Saeki H, Nakagawa H, Asahina A, Tamaki K, Shibata Y, Kuwata S. Polymorphisms of HLA-DM genes in Japanese patients with psoriasis vulgaris. Br J Dermatol 1999; 141:113-5. [PMID: 10417524 DOI: 10.1046/j.1365-2133.1999.02929.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We analysed the polymorphisms of HLA-DM genes in 85 unrelated Japanese patients with psoriasis vulgaris and 52 healthy controls using the polymerase chain reaction-restriction fragment length polymorphism method. The frequency of DMA*0101 was decreased (79% vs. 89%, P < 0.05) and that of DMA*0102 was increased (20% vs. 11%, P < 0.05) in the patients. However, neither of these remained significant after P-values were corrected for the number of comparisons made (Pc > 0.05). As we reported previously, HLA-C molecules are assumed to play a more important part than HLA-DM genes in the development of psoriasis vulgaris.
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Affiliation(s)
- H Saeki
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113, Japan
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Naruse TK, Kawata H, Anzai T, Takashige N, Kagiya M, Nose Y, Nabeya N, Isshiki G, Tatsumi N, Inoko H. Limited polymorphism in the HLA-DOA gene. TISSUE ANTIGENS 1999; 53:359-65. [PMID: 10323340 DOI: 10.1034/j.1399-0039.1999.530406.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The HLA-DO molecule, a heterodimer consisting of two novel members of the class II gene family, DOA and DOB, has recently been suggested to function as an important modulator in the HLA class II restricted antigen presentation pathway by interaction with the HLA-DM molecule. In this study, we have analyzed genetic polymorphism and allelic variation of the HLA-DOA gene in 37 HLA class II homozygous typing cells using the direct DNA sequencing technique. As a result, we recognized at least eight allelic variations, DOA*01011, *0101201, *0101202, *0101203, *01013, *0101401, *0101402 and *01015. None of them, however, result in amino acid substitution. The HLA-DOA gene has been identified in other mammals as well, and the nucleotide sequences were well conserved among these species. These results suggest that the DOA molecule has undergone strong selective pressure to preserve functional structure and conformation required for interaction with the DM molecule, preventing non-synonymous amino acid substitution.
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Affiliation(s)
- T K Naruse
- Department of Genetic Information, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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Naruse TK, Nose Y, Ando R, Araki N, Shigenari A, Ando A, Ishihara M, Kagiya M, Nabeya N, Isshiki G, Inoko H. Extended HLA haplotypes in Japanese homozygous typing cells. TISSUE ANTIGENS 1998; 51:305-8. [PMID: 9550333 DOI: 10.1111/j.1399-0039.1998.tb03107.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have defined extended HLA haplotypes including the HLA class II genes, the non-HLA genes such as TAP1, TAP2 and LMP2, and the (CTG)n microsatellite repeats within the NOTCH4 gene between DRA and 21OH in 33 Japanese HLA homozygous typing cells (HTC). These conserved haplotypes characterized by unique linkage might be maintained as a result of functional co-operation among them in the antigen presentation pathway. These HTCs can be served as an original and ethnic-specific standard panel, providing useful genetic markers in haplotypic diversity, disease association, and anthropology studies.
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Affiliation(s)
- T K Naruse
- Department of Genetic Information, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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Abstract
To investigate the genetic influences underlying the development of sarcoidosis, HLA class II genotyping was performed in Japanese patients with sarcoidosis and healthy controls using the PCR-RFLP method. The frequencies of both DR52 group antigen-associated alleles (HLA-DRB1*11, -DRB1*12 and -DRB1*14) and DRB1*08 alleles were higher in the patient group, suggesting that the common, specific amino acid residue on the DRB1 molecule of these alleles may determine susceptibility to sarcoidosis. Alternatively, it is possible that another susceptibility gene, linked to these DRB1 alleles, exists within the MHC region. We screened the TNFA, TNFB, HSP70-1 and Hum70t genes around the class III region, as well as the HLA-DMA and -DMB genes in the class II region, for genetic polymorphism in sarcoidosis. None of these genes suggested a susceptibility to sarcoidosis. These studies support the thesis that one of the major genetic factors controlling the development of sarcoidosis is located within the DRB1 locus in the HLA class II region.
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Affiliation(s)
- M Ishihara
- Department of Ophthalmology, Yokohama City University, School of Medicine, Kanagawa, Japan
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Kobayashi T, Yokoyama I, Hayashi S, Negita M, Namil Y, Katayama A, Nagasaka T, Koike C, Tachi Y, Mei GL, Haba T, Tominaga Y, Naruse T, Inoko H, Uchida K, Takagi H. TAP1, TAP2, LMP2, DMA, and DMB genetic polymorphisms in renal transplantation. Transplant Proc 1998; 30:29-30. [PMID: 9474948 DOI: 10.1016/s0041-1345(97)01170-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- T Kobayashi
- Department of Surgery II, Nagoya University School of Medicine, Japan
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