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Manolova I, Ivanova M, Vasilev G, Stoilov R, Miteva L, Stanilova S. Impact of IL12B Polymorphisms on Genetic Susceptibility and IL-12p40 and IL-23 Serum Levels in Rheumatoid Arthritis. Immunol Invest 2019; 49:1-14. [PMID: 31161840 DOI: 10.1080/08820139.2019.1622561] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The aim of this study was to evaluate the possible association of IL12B gene polymorphisms with serum levels of IL-12p40, IL-23 and genetic susceptibility to rheumatoid arthritis (RA) in the Bulgarian population. Genotyping for IL12Bpro (rs17860508) and IL12B A/C - 3' UTR (rs3212227) polymorphisms was performed by polymerase chain reaction (PCR)-based methods in 125 RA patients and 239 healthy controls. The IL-23 and IL-12p40 serum levels were measured by enzyme-linked immunosorbent assay (ELISA). An association was established between the rs17860508 polymorphism and RA susceptibility in Bulgarian population with an increased frequency of rs17860508 minor allele-2 and homozygous genotype-22 in RA patients. The rs17860508 risk RA genotype-22 was also significantly correlated to elevated serum IL-23 in RA patients. Although, there was no association between the rs3212227 and genetic predisposition to RA, significantly increased serum levels of both Il-12p40 and IL-23 were observed in RA patients with the rs3212227 AA genotype. Furthermore, the distribution of haplotypes and genotype combination in our cohort indicated increased RA risk in individuals carrying the rs17860508/rs3212227 2/A haplotype or 2.2/AC+CC combination, while 1/A haplotype or 1.1/AA combination may be protective for RA. In conclusion, our study demonstrates a functional effect of IL12B polymorphisms on IL-12p40 and IL-23 cytokine levels in RA patients and suggests a leading role for IL12B rs17860508 in the genetic predisposition to RA, while IL12B rs3212227 significantly modify the RA risk in Bulgarian population.
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Affiliation(s)
- Irena Manolova
- Department of Molecular Biology, Immunology and Medical Genetics, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
| | - Mariana Ivanova
- Clinic of Rheumatology, University Hospital "St. Iv. Rilski", Medical Faculty, Medical University, Sofia, Bulgaria
| | - Georgi Vasilev
- Laboratory of Clinical immunology, University Hospital "St. Iv. Rilski", Medical Faculty, Medical University, Sofia, Bulgaria
| | - Rumen Stoilov
- Clinic of Rheumatology, University Hospital "St. Iv. Rilski", Medical Faculty, Medical University, Sofia, Bulgaria
| | - Lyuba Miteva
- Department of Molecular Biology, Immunology and Medical Genetics, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
| | - Spaska Stanilova
- Department of Molecular Biology, Immunology and Medical Genetics, Medical Faculty, Trakia University, Stara Zagora, Bulgaria
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Li SM, Yang HJ, Zhou DX, Liu MY. WITHDRAWN: Associations between polymorphisms of HLA-B gene and postmenopausal osteoporosis in Chinese Han population. Hum Immunol 2014:S0198-8859(14)00172-4. [PMID: 24952211 DOI: 10.1016/j.humimm.2014.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 06/05/2014] [Accepted: 06/09/2014] [Indexed: 10/25/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Shu-Ming Li
- Department of Orthopedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Hong-Juan Yang
- Support Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Dang-Xia Zhou
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an 710061, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an 710061, China.
| | - Meng-Ying Liu
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an 710061, China
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Li SM, Zhou DX, Liu MY. Associations between polymorphisms of HLA-B gene and postmenopausal osteoporosis in Chinese Han population. Int J Immunogenet 2014; 41:324-9. [PMID: 24917365 DOI: 10.1111/iji.12130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 04/27/2014] [Indexed: 11/28/2022]
Abstract
Osteoporosis is a systemic skeletal disease, which is more prevalent in postmenopausal women. Osteoporosis likely develops beginning with genetic risk. This study explored the relationships between polymorphisms of HLA-B gene and postmenopausal osteoporosis in a Chinese Han population. Polymerase chain reaction sequence-based typing (PCR-SBT) method was used for DNA typing at HLA-B locus in 70 patients with postmenopausal osteoporosis and 73 healthy controls in female Han population of Shaanxi Province, situated in north-western China. We found that 40 HLA-B alleles in postmenopausal osteoporosis patients and control subjects, respectively. Furthermore, the frequency of HLA-B* 3501 allele was significantly higher in postmenopausal osteoporosis patients than in the control group (P = 0.033), and the relative risk was 7.632 (95% CI: 0.927-62.850). Our results suggest that HLA-B* 3501 was likely an important risk factor for postmenopausal osteoporosis. As different populations have different HLA polymorphisms, further investigation of the relationship of various HLA genes and osteoporosis with larger sample size is still necessary in the future.
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Affiliation(s)
- S-M Li
- Department of Orthopedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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Zhou DX, Zhang J, Wang HX, Wang XF, Tian Z, Zhao WB, Han SP, Zhang J, Huo YW, Tian H. Association study of HLA-B alleles with idiopathic male infertility in Han population of China. J Assist Reprod Genet 2011; 28:979-85. [PMID: 21870185 PMCID: PMC3220441 DOI: 10.1007/s10815-011-9622-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Accepted: 08/10/2011] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To investigate the distributions of HLA-B alleles and estimate their associations with idiopathic male infertility in Chinese Han population. METHODS Polymerase chain reaction-sequence-based typing (PCR-SBT) method was used for DNA typing at HLA-B locus in 109 patients with idiopathic male infertility and 152 healthy controls in male Han population of Shaanxi Province, situated in northwestern China. RESULTS In total, we detected 45 HLA-B alleles in idiopathic infertile patients, 48 HLA-B alleles in control subjects. However, no significant differences of these allelic frequencies were found between the infertile patients and the controls. CONCLUSION HLA-B gene was unlikely a major risk factor of idiopathic male infertility in this sample population. As different populations have different HLA polymorphisms, investigation of the relationship of other HLA genes and idiopathic male infertility with larger sample size, is warranted in the future.
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Affiliation(s)
- Dang-Xia Zhou
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an, 710061, China.
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Zhou DX, Huang XC, Wang XF, Zhang J, Wang H, Tian Z. Association study of human leucocyte antigen-A gene with idiopathic male infertility in Han population of China. Andrologia 2011; 44 Suppl 1:213-8. [DOI: 10.1111/j.1439-0272.2011.01166.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Lebedeva TV, Mastromarino SA, Lee E, Ohashi M, Alosco SM, Yu N. Resolution of HLA class I sequence-based typing ambiguities by group-specific sequencing primers. ACTA ACUST UNITED AC 2011; 77:247-50. [PMID: 21299532 DOI: 10.1111/j.1399-0039.2010.01616.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The increasing demand for allele-level human leukocyte antigen (HLA) typing has led the sequence-based typing (SBT) to become the preferred method. In turn, the steady increase in the number of HLA alleles driven by the adoption of SBT as the ultimate typing method leads to the ever increasing number of cis/trans ambiguities. Over the last few years, additional sequencing with the commercially available group-specific sequencing primers (GSSPs) has replaced sequence-specific primer-polymerase chain reaction and group-specific amplification as the means of resolving cis/trans ambiguities in many laboratories. Here we summarize our 3-year experience in designing and utilizing GSSPs for resolution of HLA class I ambiguities. The panel of GSSPs used in our laboratory includes 14 primers for HLA-A, 18 for HLA-B, and 13 primers for HLA-C. The panel resolves 99.9% of all ambiguities.
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Affiliation(s)
- T V Lebedeva
- HLA Laboratory, American Red Cross Blood Services, New England Region, Dedham, MA 02026, USA.
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Eberhard HP, Feldmann U, Bochtler W, Baier D, Rutt C, Schmidt AH, Müller CR. Estimating unbiased haplotype frequencies from stem cell donor samples typed at heterogeneous resolutions: a practical study based on over 1 million German donors. ACTA ACUST UNITED AC 2010; 76:352-61. [DOI: 10.1111/j.1399-0039.2010.01518.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tang J, Malhotra R, Song W, Brill I, Hu L, Farmer PK, Mulenga J, Allen S, Hunter E, Kaslow RA. Human leukocyte antigens and HIV type 1 viral load in early and chronic infection: predominance of evolving relationships. PLoS One 2010; 5:e9629. [PMID: 20224785 PMCID: PMC2835758 DOI: 10.1371/journal.pone.0009629] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Accepted: 02/18/2010] [Indexed: 11/18/2022] Open
Abstract
Background During untreated, chronic HIV-1 infection, plasma viral load (VL) is a relatively stable quantitative trait that has clinical and epidemiological implications. Immunogenetic research has established various human genetic factors, especially human leukocyte antigen (HLA) variants, as independent determinants of VL set-point. Methodology/Principal Findings To identify and clarify HLA alleles that are associated with either transient or durable immune control of HIV-1 infection, we evaluated the relationships of HLA class I and class II alleles with VL among 563 seroprevalent Zambians (SPs) who were seropositive at enrollment and 221 seroconverters (SCs) who became seropositive during quarterly follow-up visits. After statistical adjustments for non-genetic factors (sex and age), two unfavorable alleles (A*3601 and DRB1*0102) were independently associated with high VL in SPs (p<0.01) but not in SCs. In contrast, favorable HLA variants, mainly A*74, B*13, B*57 (or Cw*18), and one HLA-A and HLA-C combination (A*30+Cw*03), dominated in SCs; their independent associations with low VL were reflected in regression beta estimates that ranged from −0.47±0.23 to −0.92±0.32 log10 in SCs (p<0.05). Except for Cw*18, all favorable variants had diminishing or vanishing association with VL in SPs (p≤0.86). Conclusions/Significance Overall, each of the three HLA class I genes had at least one allele that might contribute to effective immune control, especially during the early course of HIV-1 infection. These observations can provide a useful framework for ongoing analyses of viral mutations induced by protective immune responses.
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Affiliation(s)
- Jianming Tang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America.
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Scully M, Brown J, Patel R, McDonald V, Brown CJ, Machin S. Human leukocyte antigen association in idiopathic thrombotic thrombocytopenic purpura: evidence for an immunogenetic link. J Thromb Haemost 2010; 8:257-62. [PMID: 19922436 DOI: 10.1111/j.1538-7836.2009.03692.x] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Thrombotic thrombocytopenic purpura (TTP) is a rare, acute, life-threatening disorder, associated with a deficiency in ADAMTS 13. The majority of acute, idiopathic, adult TTP cases are associated with anti-ADAMTS 13 IgG antibodies. However, the factor(s) precipitating an acute TTP episode are not always obvious; indeed, a multifactorial etiology is likely. OBJECTIVES AND METHODS DNA was used for human leukocyte antigen (HLA) class II typing, using polymerase chain reaction (PCR)-sequence-specific primer and PCR-sequence-specific oligonucleotide probe to methodology to investigate 50 European acquired idiopathic TTP cases. RESULTS There was an increase in the frequency of HLA-DQB1*0301 (HLA-DQ7) in patients with TTP as compared with controls [58.0% vs. 34.5% (P=0.048)]. The frequencies of HLA-DRB1*11 and HLA-DRB3* were also significantly increased in TTP patients as compared with controls [44.0% vs. 12.0% (P=0.0024) and 84.0% vs. 58.0% (P=0.024)], although it remains uncertain whether susceptibility is influenced by HLA-DQ or HLA-DR molecules or other genes in this haplotype. The frequencies of HLA-DRB1*04 and HLA-DRB4 (HLA-DR53) were significantly decreased in the patient group as compared with controls [10.0% vs. 35.0% and 26.0% vs. 61.5% (P=0.0096 and P=0.0024, respectively)], and may have a protective effect against the development of TTP. CONCLUSION Analysis identified HLA class II types associated with susceptibility to and a protective effect against the development of acute acquired TTP in European patients. This provides the first description of a genetic factor predicting the risk of developing acquired antibody-mediated TTP.
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Affiliation(s)
- M Scully
- Department of Haematology, University College of London Hospitals, and Haemostasis Research Unit, University College London, London, UK.
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Song W, Ruder AM, Hu L, Li Y, Ni R, Shao W, Kaslow RA, Butler M, Tang J. Genetic epidemiology of glioblastoma multiforme: confirmatory and new findings from analyses of human leukocyte antigen alleles and motifs. PLoS One 2009; 4:e7157. [PMID: 19774073 PMCID: PMC2742900 DOI: 10.1371/journal.pone.0007157] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 09/01/2009] [Indexed: 11/19/2022] Open
Abstract
Background Human leukocyte antigen (HLA) class I genes mediate cytotoxic T-lymphocyte responses and natural killer cell function. In a previous study, several HLA-B and HLA-C alleles and haplotypes were positively or negatively associated with the occurrence and prognosis of glioblastoma multiforme (GBM). Methodology/Principal Findings As an extension of the Upper Midwest Health Study, we have performed HLA genotyping for 149 GBM patients and 149 healthy control subjects from a non-metropolitan population consisting almost exclusively of European Americans. Conditional logistic regression models did not reproduce the association of HLA-B*07 or the B*07-Cw*07 haplotype with GBM. Nonetheless, HLA-A*32, which has previously been shown to predispose GBM patients to a favorable prognosis, was negatively associated with occurrence of GBM (odds ratio = 0.41, p = 0.04 by univariate analysis). Other alleles (A*29, A*30, A*31 and A*33) within the A19 serology group to which A*32 belongs showed inconsistent trends. Sequencing-based HLA-A genotyping established that A*3201 was the single A*32 allele underlying the observed association. Additional evaluation of HLA-A promoter and exon 1 sequences did not detect any unexpected single nucleotide polymorphisms that could suggest differential allelic expression. Further analyses restricted to female GBM cases and controls revealed a second association with a specific HLA-B sequence motif corresponding to Bw4-80Ile (odds ratio = 2.71, p = 0.02). Conclusions/Significance HLA-A allelic product encoded by A*3201 is likely to be functionally important to GBM. The novel, sex-specific association will require further confirmation in other representative study populations.
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Affiliation(s)
- Wei Song
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Avima M. Ruder
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio, United States of America
| | - Liangyuan Hu
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Yufeng Li
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Rong Ni
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Wenshuo Shao
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Richard A. Kaslow
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - MaryAnn Butler
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio, United States of America
| | - Jianming Tang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
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Li Y, Ni R, Song W, Shao W, Shrestha S, Ahmad S, Cunningham CK, Flynn PM, Kapogiannis BG, Wilson CM, Tang J. Clear and independent associations of several HLA-DRB1 alleles with differential antibody responses to hepatitis B vaccination in youth. Hum Genet 2009; 126:685-96. [PMID: 19597844 PMCID: PMC2771141 DOI: 10.1007/s00439-009-0720-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Accepted: 07/05/2009] [Indexed: 12/18/2022]
Abstract
To confirm and refine associations of human leukocyte antigen (HLA) genotypes with variable antibody (Ab) responses to hepatitis B vaccination, we have analyzed 255 HIV-1 seropositive (HIV+) youth and 80 HIV-1 seronegatives (HIV−) enrolled into prospective studies. In univariate analyses that focused on HLA-DRB1, -DQA1, and -DQB1 alleles and haplotypes, the DRB1*03 allele group and DRB1*0701 were negatively associated with the responder phenotype (serum Ab concentration ≥ 10 mIU/mL) (P = 0.026 and 0.043, respectively). Collectively, DRB1*03 and DRB1*0701 were found in 42 (53.8%) out of 78 non-responders (serum Ab <10 mIU/mL), 65 (40.6%) out of 160 medium responders (serum Ab 10–1,000 mIU/mL), and 27 (27.8%) out of 97 high responders (serum Ab >1,000 mIU/mL) (P < 0.001 for trend). Meanwhile, DRB1*08 was positively associated with the responder phenotype (P = 0.010), mostly due to DRB1*0804 (P = 0.008). These immunogenetic relationships were all independent of non-genetic factors, including HIV-1 infection status and immunodeficiency. Alternative analyses confined to HIV+ youth or Hispanic youth led to similar findings. In contrast, analyses of more than 80 non-coding, single nucleotide polymorphisms within and beyond the three HLA class II genes revealed no clear associations. Overall, several HLA-DRB1 alleles were major predictors of differential Ab responses to hepatitis B vaccination in youth, suggesting that T-helper cell-dependent pathways mediated through HLA class II antigen presentation are critical to effective immune response to recombinant vaccines.
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Affiliation(s)
- Yufeng Li
- Department of Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Rong Ni
- Department of Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Wei Song
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL USA
| | - Wenshuo Shao
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL USA
| | - Sadeep Shrestha
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL USA
| | - Sushma Ahmad
- Westat, 1650 Research Boulevard, Rockville, MD USA
| | | | - Patricia M. Flynn
- Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, TN USA
| | - Bill G. Kapogiannis
- Pediatric, Adolescent, and Maternal AIDS Branch, National Institute of Child Health and Human Development, Bethesda, MD USA
| | - Craig M. Wilson
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL USA
| | - Jianming Tang
- Department of Medicine, University of Alabama at Birmingham, 1665 University Boulevard, Birmingham, AL 35294 USA
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Arnett FC, Gourh P, Shete S, Ahn CW, Honey RE, Agarwal SK, Tan FK, McNearney T, Fischbach M, Fritzler MJ, Mayes MD, Reveille JD. Major histocompatibility complex (MHC) class II alleles, haplotypes and epitopes which confer susceptibility or protection in systemic sclerosis: analyses in 1300 Caucasian, African-American and Hispanic cases and 1000 controls. Ann Rheum Dis 2009; 69:822-7. [PMID: 19596691 PMCID: PMC2916702 DOI: 10.1136/ard.2009.111906] [Citation(s) in RCA: 140] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Objective To determine human leucocyte antigen-class II (HLA-class II) (DRB1, DQB1, DQA1 and DPB1) alleles, haplotypes and shared epitopes associated with scleroderma (systemic sclerosis (SSc)) and its subphenotypes in a large multi-ethnic US cohort by a case–control association study. Patients and methods 1300 SSc cases (961 white, 178 black and 161 Hispanic subjects) characterised for clinical skin forms (limited vs diffuse), SSc-specific autoantibodies (anticentromere (ACA), anti-topoisomerase I (ATA), anti-RNA polymerase III (ARA), anti-U3 ribonucleoprotein (fibrillarin)) and others were studied using molecular genotyping. Statistical analyses in SSc itself by ethnicity, gender, skin type and autoantibodies were performed using exact logistic regression modelling for dominant, additive and recessive effects from HLA. Results The strongest positive class II associations with SSc in white and Hispanic subjects were the DRB1*1104, DQA1*0501, DQB1*0301 haplotype and DQB1 alleles encoding a non-leucine residue at position 26 (DQB1 26 epi), while the DRB1*0701, DQA1*0201, DQB1*0202 haplotype and DRB1*1501 haplotype were negatively correlated and possibly protective in dominant and recessive models, respectively. These associations did not discriminate between limited and diffuse SSc. SSc in black subjects was associated with DRB1*0804, DQA1*0501, DQB1*0301 alleles. DPB1*1301 showed the highest odds ratio for ATA (OR = 14). Moreover, it showed no linkage disequilibrium or gene interaction with DR/DQ. ACA was best explained by DQB1*0501 and DQB1*26 epi alleles and ARA by DRB1*0404, DRB1*11 and DQB1*03 alleles in white and Hispanic subjects but DRB1*08 in black subjects. Conclusion These data indicate unique and multiple HLA-class II effects in SSc, especially on autoantibody markers of different subphenotypes.
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Affiliation(s)
- Frank C Arnett
- Division of Rheumatology, Department of Internal Medicine, The University of Texas Health Science Center at Houston (UTHSC-H), 6431 Fannin Street, MSB 5.270, Houston, TX 77030, USA.
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Zhang Q, Xue X, Xu X, Wang C, Chang W, Pan W. Influence of HLA-DRB1 alleles on antibody responses to PfCP-2.9-immunized and naturally infected individuals. J Clin Immunol 2009; 29:454-60. [PMID: 19247821 DOI: 10.1007/s10875-009-9281-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2008] [Accepted: 02/11/2009] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The Plasmodium falciparum chimeric protein, PfCP-2.9, which consists of apical membrane antigen (AMA)-1(III) and merozoite surface protein (MSP)1-19, is a promising asexual-stage malaria vaccine currently being evaluated in clinical trials. This study attempts to investigate the potential association between human leukocyte antigen (HLA)-DRB1 genotype and antibody response against PfCP-2.9 in healthy population and malaria patients. MATERIALS AND METHODS We investigated the HLA-DRB1 alleles in 40 participants from phase I trial and 86 malaria patients from southern China by polymerase chain reaction with allele sequence-specific primers. The antibody and cellular response against PfCP-2.9 or its components were measured by enzyme-linked immunosorbent assay and T lymphocyte proliferation assay. RESULTS In clinical subjects, the anti-PfCP-2.9 antibody response was likely suppressed by HLA-DR6 alleles, which was consistent with the T lymphocyte proliferation assay. Nevertheless, HLA-DR7 positively correlated with antibody responses in naturally infected individuals while DR8 correlated with weaker antibody responses for all the three recombinant proteins. Moreover, parasitemia was significantly lower in samples with higher antibody levels against PfCP-2.9 or rMSP1-19, but not for rAMA-1(III). CONCLUSION These data suggest that antibody responses against PfCP-2.9, AMA-1(III), or MSP1-19 elicited by vaccine formulation or natural infection are controlled by different HLA-II alleles. Moreover, the antibody response to MSP1-19 contributed more to protection immunity than AMA-1(III).
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Affiliation(s)
- Qingfeng Zhang
- Department of Pathogenic Biology and State Key Laboratory of Medical Immunology, Second Military Medical University, Shanghai, China
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Wanner M, Bochert S, Schreyer IM, Rall G, Rutt C, Schmidt AH. Losing the genetic twin: donor grief after unsuccessful unrelated stem cell transplantation. BMC Health Serv Res 2009; 9:2. [PMID: 19128469 PMCID: PMC2630924 DOI: 10.1186/1472-6963-9-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Accepted: 01/07/2009] [Indexed: 11/10/2022] Open
Abstract
Background Stem cell transplantations from related or unrelated donors are used to cure leukaemia and other blood diseases. When a patient dies after an unsuccessful transplantation, interested unrelated donors are informed about the failure by their donor centre. Studies focussing on failed related donations show that donors undergo an intense grieving process. As there are only two investigations about reactions from unrelated donors, knowledge about their reactions is less comprehensive. Methods We conducted a prospective study of reactions of unrelated donors to the information of failed transplantations, subject to various communication methods (letter, phone). Questionnaires were sent to 395 unrelated donors who received the news of their recipients' deaths between November 2005 and August 2006. In addition, twelve in-depth interviews with selected donors were carried out. Results Unrelated donors were emotionally affected by the recipients' deaths, and it is appropriate to speak about a "Donor Grief" phenomenon, as the results of 325 returned questionnaires (return rate 82.3%) and in-depth interviews show. Donors demonstrated a range of feelings such as sadness, disappointment, grief, and helplessness. These feelings were often unexpectedly intense given the fact that the recipient was a stranger. Although the news caused grief, donors underlined that they nevertheless wanted to be informed. They preferred knowledge of the failure to uncertainty. The method of providing the information is only of secondary importance. Most donors favoured the way of communication they had experienced. Conclusion This result indicates that both phone and letter communication can be justified. However, phone communication seems to be superior with respect to aspects of sensitivity. In spite of transplantation failure and the associated negative feelings, most donors were happy to have donated and would be willing to do so again. Our results underline the special responsibility of donor centres for informing and supporting unrelated volunteer donors in case their recipients have died.
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Affiliation(s)
- Martina Wanner
- DKMS German Bone Marrow Donor Center, Tuebingen, Germany.
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Chao YL, Shen YC, Liao DL, Chen JY, Wang YC, Lai IC, Liou YJ, Chen CH. Association study of HLA-A gene and schizophrenia in Han Chinese from Taiwan. Prog Neuropsychopharmacol Biol Psychiatry 2008; 32:1834-7. [PMID: 18786593 DOI: 10.1016/j.pnpbp.2008.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Revised: 08/14/2008] [Accepted: 08/14/2008] [Indexed: 11/22/2022]
Abstract
Dysregulation of the immune response has been proposed as a precipitating factor of schizophrenia, and human leukocyte antigens (HLA) play a critical role in regulating the cascade of immunological reaction. Hence, many studies have investigated the relationship between the HLA system and schizophrenia. HLA is a complex gene family that contains several highly polymorphic genes, while the HLA-A gene is the most often studied gene to be associated with schizophrenia in the literature. A recent study reported that the interaction of the HLA-A10 allele and Chlamydial infection was highly associated with schizophrenia in a German population, which prompted us to investigate whether the HLA-A gene was also associated with schizophrenia in our population. Using a sequencing-based HLA typing method, we determined the HLA-A genotypes in 377 Han Chinese patients with schizophrenia (214 males, 163 females) and 321 non-psychotic Han Chinese control subjects (164 males, 157 females) from Taiwan. In total, 26 DNA-defined HLA-A alleles were identified in this sample. However, no significant differences of these allelic frequencies were found between the patients and the control subjects, suggesting that the HLA-A gene was unlikely a major risk factor of schizophrenia in this sample. As different populations have different HLA polymorphisms, an examination of the relationship of other HLA genes and schizophrenia in our population, with a larger sample size, is warranted in the future.
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Asquith B. The evolutionary selective advantage of HIV-1 escape variants and the contribution of escape to the HLA-associated risk of AIDS progression. PLoS One 2008; 3:e3486. [PMID: 18941529 PMCID: PMC2567026 DOI: 10.1371/journal.pone.0003486] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Accepted: 10/01/2008] [Indexed: 11/19/2022] Open
Abstract
HIV-1 escape from surveillance by cytotoxic T lymphocytes (CTL) is thought to cause at least transient weakening of immune control. However, the CTL response is highly adaptable and the long-term consequences of viral escape are not fully understood. The objective of this study was to address the question “to what extent does HIV-1 escape from CTL contribute to HLA-associated AIDS progression?” We combined an analysis of 21 escape events in longitudinally-studied HIV-1 infected people with a population-level analysis of the functional CTL response in 150 subjects (by IFNg ELISpot) and an analysis of the HIV-1 sequence database to quantify the contribution of escape to the HLA-associated rate of AIDS progression. We found that CTL responses restricted by protective HLA class I alleles, which are associated with slow progression to AIDS, recognised epitopes where escape variants had a weak evolutionary selective advantage (P = 0.008) and occurred infrequently (P = 0.017). Epitopes presented by protective HLA class I alleles were more likely to elicit a CTL response (P = 0.001) and less likely to contain sequence variation (P = 0.006). A third of between-individual variation in HLA-associated disease risk was predicted by the selective advantage of escape variants: a doubling in the evolutionary selective advantage was associated with a decrease in the AIDS-free period of 1.2 yrs. These results contribute to our understanding of what makes a CTL response protective and why some individuals progress to AIDS more rapidly than others.
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Affiliation(s)
- Becca Asquith
- Department of Immunology, Imperial College London, London, United Kingdom.
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Tang J, Shao W, Yoo YJ, Brill I, Mulenga J, Allen S, Hunter E, Kaslow RA. Human leukocyte antigen class I genotypes in relation to heterosexual HIV type 1 transmission within discordant couples. J Immunol 2008; 181:2626-35. [PMID: 18684953 DOI: 10.4049/jimmunol.181.4.2626] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Differences in immune control of HIV-1 infection are often attributable to the highly variable HLA class I molecules that present viral epitopes to CTL. In our immunogenetic analyses of 429 HIV-1 discordant Zambian couples (infected index partners paired with cohabiting seronegative partners), several HLA class I variants in index partners were associated with contrasting rates and incidence of HIV-1 transmission within a 12-year study period. In particular, A*3601 on the A*36-Cw*04-B*53 haplotype was the most unfavorable marker of HIV-1 transmission by index partners, while Cw*1801 (primarily on the A*30-Cw*18-B*57 haplotype) was the most favorable, irrespective of the direction of transmission (male to female or female to male) and other commonly recognized cofactors of infection, including age and GUI. The same HLA markers were further associated with contrasting viral load levels in index partners, but they had no clear impact on HIV-1 acquisition by the seronegative partners. Thus, HLA class I gene products not only mediate HIV-1 pathogenesis and evolution but also influence heterosexual HIV-1 transmission.
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Affiliation(s)
- Jianming Tang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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19
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Athanassopoulos P, Balk AH, Vaessen LM, Caliskan K, Takkenberg JJ, Weimar W, Bogers AJ. Blood dendritic cell levels and phenotypic characteristics in relation to etiology of end-stage heart failure: implications for dilated cardiomyopathy. Int J Cardiol 2009; 131:246-56. [PMID: 18243370 DOI: 10.1016/j.ijcard.2007.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2007] [Revised: 08/17/2007] [Accepted: 10/27/2007] [Indexed: 11/24/2022]
Abstract
BACKGROUND Dysregulation of dendritic cell (DC) mediated immune responses towards auto-antigens, is considered an important feature in the maintenance of experimentally induced heart failure (HF). In order to evaluate the role of blood DCs in cardiomyopathies of different origins, we examined myeloid (mDC) and plasmacytoid (pDC) subset levels and maturation characteristics, according to HF severity and etiology in humans. METHODS Absolute numbers of mDCs and pDCs in 12 New York Heart Association (NYHA) class-II, 28 NYHA class III-IV HF patients and 18 healthy controls, were studied by 4-colour whole blood flow cytometry. RESULTS End-stage (NYHA III-IV) HF patients had comparable circulating DC subset levels to NYHA-II patients and controls. However, within the NYHA III-IV group total DC levels in patients with non-ischemic dilated cardiomyopathy (DCM) were higher (P<0.001) than in patients with coronary artery disease (CAD), hypertrophic cardiomyopathy (HCM) or other HF etiology. This was due to a significant increase of primarily mDCs (P<0.0001) and to a lesser extent of pDCs (P<0.05) in idiopathic DCM patients, independent of systolic or diastolic cardiac dysfunction. Maturation marker CD83 and lymphoid homing chemokine receptor CCR7 surface expression was enhanced only on mDCs, but not pDCs from DCM patients (P<0.05), compared to patients with CAD, HCM or other underlying cardiac pathophysiology. CONCLUSIONS Total blood DC levels in end-stage HF are elevated in patients with DCM. Whole blood DC characterisation may lead to new insights into the pathophysiology of idiopathic DCM in humans.
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20
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Desmond CP, Bartholomeusz A, Gaudieri S, Revill PA, Lewin SR. A Systematic Review of T-cell Epitopes in Hepatitis B Virus: Identification, Genotypic Variation and Relevance to Antiviral Therapeutics. Antivir Ther 2008. [DOI: 10.1177/135965350801300218] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background The immune response to hepatitis B virus (HBV) is important for both viral control and disease pathogenesis. A detailed understanding of the HBV-specific T-cell responses may potentially lead to novel therapeutic strategies for HBV. Methods All English language journal articles (including articles in press) up to October 2007 were retrieved using searches of MEDLINE, EMBASE and the Cochrane Controlled Trial Registry. An extensive database of HBV sequences (SeqHepB) and GenBank were used to assess the degree of sequence variation in each epitope. The new standardized nomenclature for HBV amino acid position number was applied to all previously defined epitopes. Results Forty-four HBV-specific human leukocyte antigen (HLA) class I restricted and 32 HBV-specific HLA class II restricted epitopes have been defined and have been identified in all HBV genes. The majority of HLA class I restricted epitopes have been defined in HLA-A2-positive individuals in the setting of acute HBV infection. There is significant sequence variation of these epitopes within and between HBV genotypes. Newer HBV immunotherapeutics appear promising but are still in early phases of development. Conclusions Identification of HBV-specific epitopes in non-HLA-A2-positive individuals and recognition of genotypic variation across epitopes are important for the future development of novel immunotherapeutic strategies for the management of chronic HBV infection.
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Affiliation(s)
- Christopher P Desmond
- Department of Gastroenterology, Alfred Hospital, Melbourne, Australia
- Department of Medicine, Monash University, Melbourne, Australia
| | | | - Silvana Gaudieri
- Centre for Clinical Immunology and Biomedical Statistics, Royal Perth Hospital and Murdoch University, Perth, Australia
- Centre of Forensic Science and School of Anatomy and Human Biology, University of Western Australia, Australia
| | - Peter A Revill
- Victorian Infectious Diseases Reference Laboratory, Melbourne, Australia
| | - Sharon R Lewin
- Department of Medicine, Monash University, Melbourne, Australia
- Infectious Diseases Unit, Alfred Hospital, Melbourne, Australia
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21
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Kollman C, Maiers M, Gragert L, Müller C, Setterholm M, Oudshoorn M, Hurley CK. Estimation of HLA-A, -B, -DRB1 Haplotype Frequencies Using Mixed Resolution Data from a National Registry with Selective Retyping of Volunteers. Hum Immunol 2007; 68:950-8. [DOI: 10.1016/j.humimm.2007.10.009] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2005] [Revised: 09/16/2007] [Accepted: 10/05/2007] [Indexed: 11/21/2022]
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22
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Du KM, Ji Y, Xie JH, Fu M, Sun Y, Jin Y, Sun JL, Yang JH, Zhang Z, Mao Z, Liu DZ, Qian KC, Zhao TM. HLA-A, -B, -DR haplotype frequencies from DNA typing data of 26,266 Chinese bone marrow donors. Hum Immunol 2007; 68:854-66. [PMID: 17961775 DOI: 10.1016/j.humimm.2007.04.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2007] [Revised: 04/12/2007] [Accepted: 04/23/2007] [Indexed: 11/16/2022]
Abstract
HLA phenotypes of 26,266 Chinese individuals who were recruited as potential hematopoietic stem cell donors by the Shanghai Red Cross Marrow Donor Registry, part of the China Marrow Donor Program, were determined for HLA-A, -B, and -DRB1 alleles at low to intermediate resolution using DNA-based typing methods. The large sample size of the study allowed accurate calculation of the Chinese HLA haplotype frequencies. The observed alleles correspond to 19 HLA-A, 44 -B, and 13 -DR split antigens. The serologic equivalents of HLA-A36, -A80, -B78, and -DR18 alleles were not observed. A total of 2,241 distinct HLA-A, -B, -DRB1 haplotypes were identified. Three-locus haplotype frequency was estimated using the maximum likelihood method. The lowest haplotype frequency that can be reliably estimated at a 95% confidence level was 0.000057. Using this cutoff value, 1,220 haplotypes (54%) were statistically reliable and their cumulative haplotype frequency was 0.9730. The cumulative haplotype frequency of the remaining 1,021 haplotypes (46%) was 0.0270. A regression equation of p = 0.192 log N - 0.576 was derived to estimate the probability (p) of finding an HLA-A, -B, -DR split antigens-matched donor in a pool of N Chinese donors.
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23
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Willberg CB, Pillai SK, Sharp ER, Rosenberg MG, Agudelo JD, Barbour JD, Nixon DF. Rational peptide selection to detect human immunodeficiency virus type 1-specific T-cell responses under resource-limited conditions. Clin Vaccine Immunol 2007; 14:785-8. [PMID: 17409221 PMCID: PMC1951093 DOI: 10.1128/cvi.00048-07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Understanding human immunodeficiency virus type 1 (HIV-1)-specific cytotoxic T-lymphocyte responses is important for the development of vaccines and therapies. We describe a novel method for the rational selection of peptides that target stable regions of the HIV-1 genome, rich in epitopes specifically recognized by the study population. This method will be of particular use under resource/sample-limited conditions.
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Affiliation(s)
- C B Willberg
- Division of Experimental Medicine, Department of Medicine, UCSF, San Francisco, CA 94158, USA
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24
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McCombe PA, Csurhes PA, Greer JM. Studies of HLA associations in male and female patients with Guillain–Barré syndrome (GBS) and chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). J Neuroimmunol 2006; 180:172-7. [PMID: 16935351 DOI: 10.1016/j.jneuroim.2006.07.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Revised: 07/26/2006] [Accepted: 07/27/2006] [Indexed: 11/28/2022]
Abstract
HLA associations are found to differ with the gender of the patient in some autoimmune diseases. Here we have investigated whether there are gender-related HLA associations in Guillain-Barré syndrome (GBS) and chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), both of which occur more frequently in male patients than in females. In GBS, no particular HLA associations were noted, except for a slight negative association in both males and females for carriage of HLA-DR5. In CIDP, the gene frequency and the frequency of individuals positive for HLA-DR2 were greater in female patients than female controls, although this was statistically significant only for the gene frequency. Furthermore more female CIDP patients were homozygous for DR2, than male CIDP patients, or male or female controls and patients with GBS. This suggests that sex-related factors may interact with the risk associated with carriage of HLA-DR2 for development of CIDP.
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Affiliation(s)
- Pamela A McCombe
- Neuroimmunology Research Centre, School of Medicine, the University of Queensland, Brisbane, Australia.
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25
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Affiliation(s)
- X Shan
- Beijing Red Cross Blood Center, Beijing 100088, China.
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26
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Mrazek F, Fae I, Ambruzova Z, Raida L, Kriegova E, Indrak K, Fischer GF, Petrek M. A single amino acid exchange shifts the serological reactivity of the novel HLA-B*4442 allele product from HLA-B44 to HLA-B21. Int J Immunogenet 2006; 33:197-200. [PMID: 16712651 DOI: 10.1111/j.1744-313x.2006.00596.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel HLA-B (human leukocyte antigen-B) allele, HLA-B*4442, was identified both in a Czech patient with leukaemia and in his mother. The presence of a novel allele was initially suspected because conflicting results were obtained by serological and DNA typing techniques. The HLA typing using the polymerase chain reaction-sequence-specific primers (PCR-SSP) at the two-digit level indicated an allele belonging to the HLA-B*44 group, whereas serological typing indicated HLA-B21. Typing with PCR-sequence-specific oligonucleotides (PCR-SSO) resulted in a unique reaction pattern that could not be assigned to a known allele, PCR-SSP typing at the four-digit level did not match any known B*44 allele, either. The sequencing-based typing of the HLA-B locus then revealed the novel B*4442 allele that is identical with B*4405 except a single C-->G nucleotide exchange at position 572. This exchange results in an amino acid substitution from serine to tryptophan at position 167 of the expressed HLA-B protein. The B21 serological reactivity of the novel B*4442 allele product was confirmed by employing an additional serological panel of typing sera. Our findings support previous reports claiming that serine at the position 167 in the alpha-2 domain of the HLA-B protein is a major determinant of the HLA-B44(12) serological epitope.
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Affiliation(s)
- F Mrazek
- Tissue Typing Laboratory, Department of Immunology, Medical Faculty Palacky University, Olomouc, Czech Republic.
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27
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Faner R, Casamitjana N, Coll J, Caro P, Pujol-Borrell R, Palou E, Juan M. Real-Time PCR Using Fluorescent Resonance Emission Transfer Probes for HLA-B Typing. Hum Immunol 2006; 67:374-85. [PMID: 16720220 DOI: 10.1016/j.humimm.2006.02.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2005] [Indexed: 12/01/2022]
Abstract
HLA genotyping by polymerase chain reaction (PCR) has some inherent labor-intensive and effort-demanding limitations. To overcome them, we have developed a real-time PCR with hybridization probes approach able to obtain a medium-low resolution HLA-B genotyping with fewer tubes and probes and with a shorter time requirement. Our strategy used 18 simultaneous reactions amplifying HLA-B alleles and an internal control. Monitorization of both amplifications in each tube is performed by the simultaneous application of two fluorescent resonance emission transfer probes: the first probe, different for each tube, is specific for the HLA-B locus and the second probe detects the control gene. A medium-low resolution (300 HLA-B allelic groups) typing is obtained for each sample by analyzing the melting curve patterns. Because some alleles may be determined without using the complete set of reactions, we present an alternative strategy: a first round of seven reactions and, according to the result, a second (or third) round of PCRs to solve the ambiguities. This method was validated in pretyped clinical samples and the results were completely concordant. Moreover, fewer ambiguous results were obtained. In summary, we present a new, faster, and more accurate method than currently used PCR techniques to type HLA-B alleles.
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Affiliation(s)
- Rosa Faner
- Laboratory of Immunobiology Research and Applications to Diagnosis, Banc de Sang i Teixits, Barcelona, Spain
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28
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Affiliation(s)
- X-Z Liu
- Liaoning Blood Center, Shenyang, P.R. China
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29
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Norimine J, Brown WC. Intrahaplotype and interhaplotype pairing of bovine leukocyte antigen DQA and DQB molecules generate functional DQ molecules important for priming CD4+ T-lymphocyte responses. Immunogenetics 2005; 57:750-62. [PMID: 16220347 DOI: 10.1007/s00251-005-0045-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2005] [Accepted: 08/10/2005] [Indexed: 10/25/2022]
Abstract
Antigen-specific CD4(+) T-lymphocyte responses are restricted by major histocompatibility complex class II molecules, which influence T-cell priming during infection. Human leukocyte antigen (HLA) and bovine leukocyte antigen (BoLA) DRB3 and DQ genes are polymorphic, but unlike HLA, many BoLA haplotypes have duplicated DQ genes, and antibody-blocking studies indicated that BoLA-DQ molecules present various pathogen epitopes. Limited experimentation also suggested that BoLA-DQ molecules formed by interhaplotype pairing of A and B chains are functional. To compare antigen presentation by DR and DQ molecules and to definitively demonstrate functional BoLA-DQ molecules derived from interhaplotype pairing, different combinations of DR or DQ A and B proteins were expressed with CD80 in 293-F cells for use as antigen-presenting cells (APCs). This approach identified 11 unique restriction elements including five DR and six DQ pairs for antigen-specific CD4(+) T-cell responses against tick-transmitted bovine hemoparasites Anaplasma marginale or Babesia bovis. Interhaplotype pairing of DQ A and B molecules was demonstrated. Testing of six expressed DQA/B pairs from an animal with duplicated DQ haplotypes (DH16A/DH22H) demonstrated that an interhaplotype pair, DQA*2206/DQB*1301, presented A. marginale peptide B. In DH22H and DH16A homozygous animals, DQA*2206 was tightly linked with DQB*1402, and DQA*22021 was linked with DQB*1301. APCs from these donors could not present peptide B, confirming that DQA*2206/DQB*1301 encoded a functional interhaplotype pair. Functional BoLA-DQ molecules are generated by both intrahaplotype and interhaplotype pairing of A and B chains and play a similar role to BoLA-DR in priming helper T-cell responses to important pathogens.
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Affiliation(s)
- Junzo Norimine
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA.
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30
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Li JP, Liu XZ, Gao HF, Liu X, Chen Y, Li XF, Zhe Q, Gao JB, Zhang X, Lv YZ, Yang LY, Huang XY, Yu YY, Yu FQ, Chi LP. Identification of a novel HLA-A allele HLA-A*2451 in a Chinese donor. ACTA ACUST UNITED AC 2005; 66:54-5. [PMID: 15982259 DOI: 10.1111/j.1399-0039.2005.00423.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel human leucocyte antigen-A (HLA-A) allele, A*2451, has been identified during routine sequence-specific oligonucleotide typing and sequence-based typing of a sample from a registered donor of the Chinese Marrow Donor Program. The A*2451 allele differs from the closest matching allele A*2415 by one nucleotide substitution in exon 3, nt 363 G-->A, resulting in an amino acid change from M ATG to I ATA at codon 121.
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Affiliation(s)
- J-P Li
- Liaoning Blood Center, Shenyang, P. R. China
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Nowak J, Mika-Witkowska R, Zajko M, Łopacz P. Reliability of HLA-Cw data collected in unrelated bone marrow registry and their usefulness for preliminary donor selection. Int J Immunogenet 2005; 32:319-22. [PMID: 16164700 DOI: 10.1111/j.1744-313x.2005.00533.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the present study, we addressed the question of how often HLA-DRB1-matched donors can be found by further typing of AB-matched donors and whether Cw preselection can be helpful. Sixty-eight patients and 174 donors were enrolled in the study. In all donors, confirmatory DNA Cw typing was performed to check reliability of registry Cw data. Among the 129 Cw serologically typed donors, 11 (8.5%) were not confirmed by DNA typing and for 77 (60%) at least one Cw blank antigen was genetically confirmed. In healthy controls, haplotype frequency higher than 1% has been found for 21 (55%) out of 38 Cw-DRB1 haplotypes observed. A subtotal delta made up 67% of subtotal haplotype frequency fraction of 21 haplotypes confirming strong linkage disequilibrium of Cw-DRB1 loci. After Cw preselection 12 (15.4%) out of 78 donors were matched in both DRB1. On the other hand, only two (2.1%) out of 96 AB-matched donors with unknown or incompatible Cw were matched in both DRB1 at low-resolution level (OR = 8.55; P = 0.0060; 95%CI 1.85-39.5). We found at least one DRB1-matched donor for 12 (26.1%) out of 46 patients with Cw-matched donors for which 1-5 (median = 1) of Cw-preselected donors were chosen for further typing. Cw preselection of HLA AB-matched donors for further DRB1 typing may improve the efficacy of stem cell donor search process.
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Affiliation(s)
- J Nowak
- Laboratory of Immunogenetics, Institute of Haematology and Blood Transfusion, Warsaw, Poland.
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