@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 {1690, title = {The missense variation Q705K in CIAS1/NALP3/NLRP3 gene and an NLRP1 haplotype are associated with celiac disease.}, journal = {Am J Gastroenterol}, volume = {106}, year = {2011}, month = {2011 Mar}, pages = {539-44}, abstract = {

OBJECTIVES: Celiac disease (CD) is a multifactorial common disorder with several susceptibility loci. Variations in the NALP1/NLRP1 and NALP3/NLRP3 genes have been reported to confer risk for several autoimmune conditions. We hypothesized that polymorphisms in these genes, due to their role in innate immunity and inflammatory processes, may affect susceptibility to CD.

METHODS: Two single-nucleotide polymorphisms (SNPs) in NLRP1 (rs12150220, rs2670660) and two SNPs (rs10754558, rs35829419) in NLRP3 genes were genotyped in 504 CD Italian patients and 256 healthy controls.

RESULTS: The minor A allele of NLRP3 rs35829419 (Q705K) polymorphism appeared to exert a protective role against the development of CD (P=0.029; odds ratio (OR)=0.56). Moreover, a particular NLRP1 haplotype was associated with predisposition to CD (P=0.003; OR=1.38), even more when present in combination with the rs35829419 major C allele (P=0.002; OR=1.42).

CONCLUSIONS: We hypothesized that the deregulation of CIAS1/NALP3/NLRP3 and NALP1/NLRP1 inflammasomes could have a role in CD pathogenesis.

}, keywords = {Adaptor Proteins, Signal Transducing, Adolescent, Apoptosis Regulatory Proteins, Carrier Proteins, Celiac Disease, Child, Child, Preschool, Female, Genetic Predisposition to Disease, Genotype, Glutamine, Haplotypes, Humans, Inflammasomes, Italy, Lysine, Male, Mutation, Missense, Polymorphism, Single Nucleotide}, issn = {1572-0241}, doi = {10.1038/ajg.2010.474}, author = {Pontillo, Alessandra and Vendramin, Anna and Catamo, Eulalia and Fabris, Annalisa and Crovella, Sergio} } @article {1611, title = {Tag-single nucleotide polymorphism-based human leukocyte antigen genotyping in celiac disease patients from northeastern Italy.}, journal = {Hum Immunol}, volume = {72}, year = {2011}, month = {2011 Jun}, pages = {499-502}, abstract = {

We genotyped celiac disease (CD)-associated haplotypes DQ2.5, DQ8, DQ2.2, and DQ7 in 1005 CD patients from North Eastern Italy using a Tag-single nucleotide polymorphism (SNPs) approach and real time PCR platform, checking the accuracy and reliability of the method and comparing it to traditional PCR-SSP. Only 14 of 2010 chromosomes analyzed (0.7\%) showed discrepancies between the Tag-SNPs real-time polymerase chain reaction (PCR) method and the PCR-single-strand polymorphism (SSP) technique, indicating a high sensitivity and specificity (ranging from 0.987 to 1 and from 0.998 to 0.999, respectively) for tagging with respect to corresponding human leukocyte antigen (HLA) alleles identified by PCR-SSP. Moreover, the overall cost of the Tag-SNPs HLA typing method was low (3 to 4 {\texteuro}/sample instead of 35 to 70 {\texteuro}/sample with commercial kits), making it suitable for mass screenings. Hence, we believe that the Tag-SNPs HLA typing could be used to complement or replace classic HLA typing in at high-risk groups, for research purposes and eventually in population screening programs.

}, keywords = {Adolescent, Adult, Aged, Celiac Disease, Child, Child, Preschool, Female, Humans, Infant, Italy, Male, Mass Screening, Middle Aged, Polymerase Chain Reaction, Polymorphism, Single Nucleotide, Reproducibility of Results, Reverse Transcriptase Polymerase Chain Reaction, Sensitivity and Specificity}, issn = {1879-1166}, doi = {10.1016/j.humimm.2011.03.008}, author = {Vatta, Serena and Fabris, Annalisa and Segat, Ludovica and Not, Tarcisio and Crovella, Sergio} } @article {1715, title = {Five new OTOF gene mutations and auditory neuropathy.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {74}, year = {2010}, month = {2010 May}, pages = {494-8}, abstract = {

OBJECTIVE: Purpose of this paper is to analyse OTOF gene in a series of subjects affected by auditory neuropathy.

METHODS: Four children showing mild to profound prelingual deafness, confirmed by the absence of a clear and detectable responses at auditory brainstem responses (ABR), associated with the presence of bilateral OAE, were enrolled in the study.

RESULTS AND CONCLUSIONS: Genetic analysis identified five new mutations (a nonsense, a small and a large deletion and two splicing site mutations), and one missense mutation (F1795C) previously described. These results further confirm the role of OTOF gene in auditory neuropathy. In the absence of a context of neurological syndrome, the combination of absent ABR and positive OAE responses should lead to an auditory neuropathy diagnosis and to a mutational screening in OTOF.

}, keywords = {Auditory Diseases, Central, Deafness, Evoked Potentials, Auditory, Brain Stem, Female, Humans, Male, Membrane Proteins, Mutation, Otoacoustic Emissions, Spontaneous, Polymerase Chain Reaction}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2010.02.004}, author = {Zadro, Cristina and Ciorba, Andrea and Fabris, Annalisa and Morgutti, Marcello and Trevisi, Patrizia and Gasparini, Paolo and Martini, Alessandro} } @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} }