@article {10459, title = {HLA-G regulatory polymorphisms are associated with susceptibility to HCV infection.}, journal = {HLA}, volume = {89}, year = {2017}, month = {2017 03}, pages = {135-142}, abstract = {

BACKGROUND: Hepatitis C virus (HCV) is able to bypass the immune system modulating innate and adaptive immune response and blocking T helper 1 (Th1) cell production. Because the human leukocyte antigen (HLA)-G molecule has immunomodulatory properties inhibiting the function and production of natural killer and cytotoxic lymphocyte T cells, as well as promoting shift from Th1 toward Th2 response, we hypothesized its involvement in susceptibility to HCV infection.

MATERIALS AND METHODS: Considering that HLA-G mRNA expression has been reported to be under genetic control, an association study was conducted analyzing 800 base pairs upstream the ATG at the 5{\textquoteright}upstream regulator region (URR) and 850 base pairs from ATG to exon 3 and the 3{\textquoteright}untranslated region (UTR) of HLA-G gene in Italian HCV-positive patients and uninfected controls.

RESULTS: Four 5{\textquoteright}URR polymorphisms (-725C>G>T, -509C>G, -400G>A and -398G>A), 7 polymorphisms at coding region (+15G>A, +36G>A, +243G>A, insC506, 531G>C, delA615 and 685G>A), the +644G>T polymorphism, and 1 haplotype (TTGTTCCIGAC) showed different frequency distributions between HCV patients and uninfected controls.

CONCLUSION: The results from our study suggest a possible involvement of HLA-G in the risk modulation toward HCV infection.

}, keywords = {3{\textquoteright} Untranslated Regions, 5{\textquoteright} Untranslated Regions, Adult, Aged, Aged, 80 and over, Alleles, Case-Control Studies, Exons, Female, Gene Expression, Gene Frequency, Genetic Association Studies, Genetic Predisposition to Disease, Haplotypes, Hepacivirus, Hepatitis C, HLA-G Antigens, Humans, Italy, Male, Middle Aged, Polymorphism, Single Nucleotide, Risk, Th1 Cells}, issn = {2059-2310}, doi = {10.1111/tan.12959}, author = {Catamo, E and Zupin, L and Freato, N and Polesello, V and Celsi, F and Croc{\`e}, S L and Masutti, F and Pozzato, G and Segat, L and Crovella, S} } @article {3504, title = {HLA-G 14 bp deletion/insertion polymorphism and mother-to-child transmission of HIV.}, journal = {Tissue Antigens}, volume = {83}, year = {2014}, month = {2014 Mar}, pages = {161-7}, abstract = {

The human leukocyte antigen HLA-G, highly expressed at the maternal-fetal interface, has a pivotal role in mediating immune tolerance. In this study we investigated the influence of HLA-G 14 bp insertion polymorphism in human immunodeficiency virus (HIV)-1 mother-to-child HIV-1 transmission. The 14 bp insertion polymorphism was analyzed among 99 HIV-1 positive mothers and 329 infants born to HIV-positive mothers in Zambia, among whom vertical transmission status and timing had been determined. HLA-G 14 bp insertion polymorphism was detected using a custom TaqMan single nucleotide polymorphisms (SNPs) genotyping assay. Logistic regression was conducted to examine the associations between HLA-G alleles and the risk of HIV transmission. The 14 bp insertion allele was more frequent in HIV exposed-uninfected (EU) infants than in infected infants, and was associated with reduced risk of both in utero (IU) and intrapartum (IP) HIV transmission, after adjusting for maternal cluster of differentiation 4 (CD4) cell count and plasma viral load. Maternal HLA-G 14 bp insertion genotype and HLA-G concordance between mother and child were not associated with the risk of perinatal HIV transmission. The presence of the 14 bp insertion associates with protection toward IU and IP HIV infection in children from Zambia, suggesting that HLA-G could be involved in the vertical transmission of HIV.

}, keywords = {Adult, Alleles, Base Pairing, Child, Genotype, HIV Infections, HLA-G Antigens, Humans, INDEL Mutation, Infant, Infectious Disease Transmission, Vertical, Mothers, Polymorphism, Genetic, Young Adult}, issn = {1399-0039}, doi = {10.1111/tan.12296}, author = {Segat, L and Zupin, L and Kim, H-Y and Catamo, E and Thea, D M and Kankasa, C and Aldrovandi, G M and Kuhn, L and Crovella, S} } @article {3567, title = {HLA-G gene polymorphisms associated with susceptibility to rheumatoid arthritis disease and its severity in Brazilian patients.}, journal = {Tissue Antigens}, volume = {84}, year = {2014}, month = {2014 Sep}, pages = {308-15}, abstract = {

We analyzed the possible association between human leukocyte antigen-G (HLA-G) genetic variants, supposed to regulate HLA-G expression, and the susceptibility to develop rheumatoid arthritis (RA) as well as its clinical manifestations. The 5{\textquoteright}upstream regulatory region (5{\textquoteright}URR) and 3{\textquoteright}untranslated region (3{\textquoteright}UTR) regions of the HLA-G gene were screened in 127 RA patients and 128 controls: 10 5{\textquoteright}URR and 3 3{\textquoteright}UTR HLA-G polymorphisms as well as two haplotypes were associated with risk for RA development, while a polymorphism in the 5{\textquoteright}URR showed an association with the degree of disease activity. These findings, although the number of cases analyzed is limited and the P-values are modest, indicate a possible association between HLA-G gene polymorphisms and susceptibility to develop RA disease and its severity.

}, keywords = {3{\textquoteright} Untranslated Regions, 5{\textquoteright} Flanking Region, Aged, Arthritis, Rheumatoid, Brazil, Disease Progression, DNA Mutational Analysis, Female, Gene Frequency, Genetic Association Studies, Genetic Predisposition to Disease, Genotype, Haplotypes, HLA-G Antigens, Humans, Male, Middle Aged, Polymorphism, Single Nucleotide, Risk}, issn = {1399-0039}, doi = {10.1111/tan.12396}, author = {Catamo, E and Addobbati, C and Segat, L and Sotero Fragoso, T and Domingues Barbosa, A and Tavares Dantas, A and de Ata{\'\i}de Mariz, H and F da Rocha, L and Branco Pinto Duarte, A L and Monasta, L and Sandrin-Garcia, P and Crovella, S} } @article {1900, title = {HLA-G 14bp del/ins genetic variation: association with susceptibility to human immunodeficiency virus-1 vertical transmission but not with human immunodeficiency virus-1 infection through horizontal transmission.}, journal = {Tissue Antigens}, volume = {80}, year = {2012}, month = {2012 Jul}, pages = {12-3}, keywords = {Ethnic Groups, Genetic Association Studies, Genetic Predisposition to Disease, HIV Infections, HIV-1, HLA-G Antigens, Humans, INDEL Mutation, Infectious Disease Transmission, Vertical, Polymorphism, Genetic}, issn = {1399-0039}, doi = {10.1111/j.1399-0039.2012.01874.x}, author = {Segat, L and Crovella, S} }