@article {3626, title = {HLA-G and susceptibility to develop celiac disease.}, journal = {Hum Immunol}, volume = {76}, year = {2015}, month = {2015 Jan}, pages = {36-41}, abstract = {

The Human Leukocyte Antigen-G has immunomodulatory function and its expression has been associated with several diseases. In our study we analyzed HLA-G polymorphisms in order to evaluate their possible association with susceptibility to celiac disease development. A total of 420 celiac patients and 509 controls were genotyped for HLA-G polymorphisms. We sequenced 800bp upstream the ATG codon (5{\textquoteright} upstream regulatory region) and the whole 3{\textquoteright} untranslated region of the HLA-G gene, whereas the ΔC deletion at exon 3 was detected by RFLP-PCR. Five polymorphisms (namely -477 C>G, -369 C>A, 14bp del/ins, 3187 A>G, 3196 C>G) and one haplotype (TCGGTACGAAITCCCGAG) were significantly more frequent in celiac patients than controls and associated with increased disease susceptibility. The 14bp I/I, 3187 G/G, 3196 G/G genotypes and TCGGTACGAAITCCCGAG haplotype, were still significantly associated with increased disease susceptibility (and in addition also the 3003 C/C genotype) when the analysis was restricted to patients and controls presenting the DQ2.5 or DQ8 HLA-DQ celiac disease risk haplotypes. Our findings indicate an association between HLA-G gene polymorphisms and susceptibility to celiac disease development, suggesting that HLA-G molecule is possibly involved in the pathogenesis of the disease.

}, keywords = {Adolescent, Adult, Alleles, Case-Control Studies, Celiac Disease, Child, Female, Gene Frequency, Genetic Predisposition to Disease, Haplotypes, HLA-DQ Antigens, HLA-G Antigens, Humans, Male, Middle Aged, Polymorphism, Genetic, Retrospective Studies}, issn = {1879-1166}, doi = {10.1016/j.humimm.2014.12.006}, author = {Catamo, Eulalia and Zupin, Luisa and Segat, Ludovica and Celsi, Fulvio and Crovella, Sergio} } @article {1661, title = {HLA-G 14 bp deletion/insertion polymorphism in celiac disease.}, journal = {Am J Gastroenterol}, volume = {106}, year = {2011}, month = {2011 Jan}, pages = {139-44}, abstract = {

OBJECTIVES: Nonclassical major histocompatibility class I HLA-G antigen is a tolerogenic molecule that inhibits lytic activity of natural killer (NK) cells and cytotoxic T lymphocytes. Because of its immunomodulatory and tolerogenic properties, HLA-G molecules may have a role in celiac disease (CD). We analyzed the HLA-G 14 bp deletion/insertion polymorphism, known to have a functional effect on mRNA stability, in a group of 522 CD patients, stratified for the presence of HLA-DQ2 genotype, and 400 healthy individuals to evaluate the possible effect of the polymorphism on the risk to develop the disease.

METHODS: HLA-G 14 bp deletion/insertion polymorphism (rs1704) was detected by polymerase chain reaction and double-checked by direct sequencing.

RESULTS: The 14 bp inserted (I) allele and the homozygous I/I genotype were significantly more frequent in CD patients than in healthy controls. The presence of I allele was associated with an increased risk of CD (OR 1.35) and the effect of I allele was consistent with a recessive genetic model (P<0.001).

CONCLUSIONS: Our results also indicate that the effect of the HLA-G D/I polymorphism is restricted for HLA-DQ2, and not simply due to the presence of linkage disequilibrium with the major known risk factor; moreover we found that the presence of the I allele confers an increased risk of CD in addition to the risk conferred by HLA-DQ2 alone and that subjects that carry both DQ2 and HLA-G I alleles have an increased risk of CD than subjects that carry DQ2 but not the I allele.

}, keywords = {Adolescent, Adult, Aged, Aged, 80 and over, Alleles, Case-Control Studies, Celiac Disease, Child, Child, Preschool, Confidence Intervals, Female, Genetic Predisposition to Disease, Genotype, Histocompatibility Antigens Class I, HLA Antigens, HLA-DQ Antigens, HLA-G Antigens, Humans, Male, Middle Aged, Mutagenesis, Insertional, Odds Ratio, Polymerase Chain Reaction, Polymorphism, Genetic, Reference Values, RNA Stability, Sequence Deletion, Young Adult}, issn = {1572-0241}, doi = {10.1038/ajg.2010.340}, author = {Fabris, Annalisa and Segat, Ludovica and Catamo, Eulalia and Morgutti, Marcello and Vendramin, Anna and Crovella, Sergio} } @article {1700, title = {HLA-G*0105N allele is associated with augmented risk for HIV infection in white female patients.}, journal = {AIDS}, volume = {24}, year = {2010}, month = {2010 Jul 31}, pages = {1961-4}, abstract = {

We analyzed HLA-G 3777G > C, HLA-G 14 bp deletion/insertion and HLA-G*0105N polymorphisms in HIV-positive white adult participants, infected through horizontal heterosexual transmission, and unexposed uninfected individuals, all from north eastern Italy. We report a new association between the HLA-G*0105N allele and HIV infection in adult white female participants, being HLA-G*0105N null allele correlated with an augmented risk (odds ratio = 4.35, 95\% confidence interval = 1.38-18.07, P = 0.005) for HIV infection.

}, keywords = {Adolescent, Adult, Aged, Female, Genetic Predisposition to Disease, Histocompatibility Antigens Class I, HIV Infections, HIV-1, Humans, Middle Aged, Polymorphism, Genetic, Young Adult}, issn = {1473-5571}, doi = {10.1097/QAD.0b013e32833c3324}, author = {Segat, Ludovica and Catamo, Eulalia and Fabris, Annalisa and Morgutti, Marcello and D{\textquoteright}Agaro, Pierlanfranco and Campello, Cesare and Crovella, Sergio} }