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Metcalfe S, Roger M, Faucher MC, Coutlée F, Franco EL, Brassard P. The frequency of HLA alleles in a population of Inuit women of northern Quebec. Int J Circumpolar Health 2013; 72:21350. [PMID: 23986892 PMCID: PMC3754547 DOI: 10.3402/ijch.v72i0.21350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Background Human leukocyte antigen (HLA) alleles code for proteins that are involved in the recognition of foreign antigens and activation of the immune system. The frequency of HLA alleles varies across different populations. Objective To describe the frequency of HLA alleles in a population of Inuit women of Nunavik, Quebec, Canada. Design A cohort of women was recruited from 4 different communities between January 2002 and December 2007. HLA-B*07, HLA-DQB1*03, DQB1*06:02, DRB1*13 and DRB1*15:01 alleles were typed by PCR sequence-specific primers (PCR-SSP) and HLA-E and G alleles were type by DNA-sequencing procedures. Results We obtained data on 524 participants. The most frequent HLA alleles in this population were HLA-E*01:03, HLA-G*01:04:01 and HLA-DQB1*03, and they were found in 89, 75 and 94% of the population, respectively. Conclusions The distribution of HLA alleles in Nunavik, Quebec is unique when compared to other populations in Canada or around the world.
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Affiliation(s)
- Stephanie Metcalfe
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
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Lucena-Silva N, Teixeira MAG, Ramos ADL, de Albuquerque RS, Diniz GTN, Mendes-Junior CT, Castelli EC, Donadi EA. The +3187A/G HLA-G polymorphic site is associated with polar forms and reactive reaction in leprosy. Mol Genet Genomic Med 2013; 1:123-30. [PMID: 24498610 PMCID: PMC3865579 DOI: 10.1002/mgg3.14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 05/01/2013] [Accepted: 05/02/2013] [Indexed: 01/16/2023] Open
Abstract
Considering that variability in immune response genes has been associated with susceptibility to leprosy and with disease severity, leprosy presents clinicopathological variants that are highly associated with the immune response, HLA-G has a well-recognized role in the modulation of the immune response, and polymorphisms at the 3′ untranslated region (UTR) of the HLA-G gene may influence HLA-G production, we studied the polymorphic sites at the 3′ UTR of the HLA-G gene in leprosy and their association with disease severity. We evaluated by sequencing analysis the allele, genotype, and haplotype frequencies of the 3′ UTR HLA-G polymorphic sites (14-bpINDEL/+3003C-T/+3010C-G/+3027A-C/+3035C-T/+3142C-G/+3187A-G/+3196C-G) in 146 individuals presenting reactive leprosy from a highly endemic area, and associated with bacillary load and the type of reactive leprosy. A total of 128 healthy subjects were also studied. Allele, genotype, and haplotype frequencies for the 3′ UTR HLA-G polymorphisms in leprosy patients did not differ from those observed in healthy donors. The +3187A allele was responsible for protection against the development of multibacillary leprosy in a dominant model (AA + AG)/GG, OR = 0.11, P = 0.018), and the +3187A allele and +3187A-A genotype were overrepresented in type II reactive leprosy reaction. The effect of genetic factors on leprosy susceptibility may be hidden by environmental components in highly endemic areas. The HLA-G + 3187A polymorphic site, which is related to unstable mRNA production, was associated with the development of polar forms of leprosy and reactive leprosy reaction.
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Affiliation(s)
- N Lucena-Silva
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz 50670-420, Recife-PE, Brazil ; Laboratório de Biologia Molecular, Departamento de Oncologia Pediátrica, Hospital IMIP 50070-550, Recife-PE, Brazil ; Divisão de Imunologia Clínica, Departamento de Medicina, Escola de Medicina de Ribeirão Preto, Universidade de São Paulo 14040-900, Ribeirão Preto-SP, Brazil
| | - M A G Teixeira
- Departamento de Dermatologia da Universidade de Pernambuco e Centro Integrado de Saúde Amaury de Medeiros, Secretaria de Saúde de Pernambuco 52030-010, Recife-PE, Brazil
| | - A de L Ramos
- Laboratório de Biologia Molecular, Departamento de Oncologia Pediátrica, Hospital IMIP 50070-550, Recife-PE, Brazil
| | - R S de Albuquerque
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz 50670-420, Recife-PE, Brazil ; Divisão de Imunologia Clínica, Departamento de Medicina, Escola de Medicina de Ribeirão Preto, Universidade de São Paulo 14040-900, Ribeirão Preto-SP, Brazil
| | - G T N Diniz
- Laboratorio de Métodos Quantitativos, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz 50670-420, Recife-PE, Brazil
| | - C T Mendes-Junior
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo 14040-901, Ribeirão Preto-SP, Brazil
| | - E C Castelli
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Goias - UFG 74001-970, Goiânia-GO, Brazil
| | - E A Donadi
- Divisão de Imunologia Clínica, Departamento de Medicina, Escola de Medicina de Ribeirão Preto, Universidade de São Paulo 14040-900, Ribeirão Preto-SP, Brazil
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Silva ID, Muniz YC, Sousa MC, Silva KR, Castelli EC, Filho JC, Osta AP, Lima MI, Simões RT. HLA-G 3′UTR polymorphisms in high grade and invasive cervico-vaginal cancer. Hum Immunol 2013; 74:452-8. [DOI: 10.1016/j.humimm.2012.11.025] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 11/26/2012] [Accepted: 11/27/2012] [Indexed: 11/26/2022]
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Teixeira AC, Mendes-Junior CT, Souza FF, Marano LA, Deghaide NHS, Ferreira SC, Mente ED, Sankarankutty AK, Elias-Junior J, Castro-e-Silva O, Donadi EA, Martinelli ALC. The 14bp-deletion allele in the HLA-G gene confers susceptibility to the development of hepatocellular carcinoma in the Brazilian population. ACTA ACUST UNITED AC 2013; 81:408-13. [PMID: 23506091 DOI: 10.1111/tan.12097] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Revised: 01/21/2013] [Accepted: 02/18/2013] [Indexed: 01/21/2023]
Abstract
Human leukocyte antigen-G (HLA-G) is a nonclassical HLA class I molecule involved in tumor escape mechanisms. Considering that the HLA-G 14bp insertion/deletion polymorphism is located at the 3' untranslated region (3'UTR) in exon 8, and since it has been associated with the magnitude of HLA-G production, we studied the association of 14bp insertion/deletion polymorphism with the risk of developing hepatocellular carcinoma (HCC). A total of 109 HCC patients followed at the University Hospital, Faculty of Medicine of Ribeirão Preto, São Paulo, Brazil, and 202 healthy controls from the same geographic area were genotyped for the 14bp insertion/deletion polymorphism using polymerase chain reaction (PCR) and polyacrylamide gel electrophoresis. Compared to controls, the frequency of the 14bp deletion allele was overrepresented in HCC patients (65% versus 56%, respectively, P = 0.0326). The 14bp deletion conferred an odds ratio (OR) of 1.46 [95% confidence interval (CI): 1.04-2.05]. Similarly, the deletion/deletion genotype was marginally overrepresented in HCC patients (45% versus 35% in controls, P = 0.0871), conferring an OR of 1.54 (95% CI: 0.96-2.48). The frequencies of the deletion/insertion or insertion/insertion genotypes observed in patients were not statistically different from those observed in controls (P > 0.05). Our results suggest that the 14bp-deletion allele in HLA-G gene is associated with HCC susceptibility in a Brazilian population.
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Affiliation(s)
- A C Teixeira
- Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Human leukocyte antigen-G (HLA-G) expression in cervical cancer lesions is associated with disease progression. Hum Immunol 2012; 73:946-9. [DOI: 10.1016/j.humimm.2012.07.041] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 04/24/2012] [Accepted: 07/11/2012] [Indexed: 11/21/2022]
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