@article {10770, title = {DEFB1 polymorphisms and HIV-1 mother-to-child transmission in Zambian population.}, journal = {J Matern Fetal Neonatal Med}, year = {2018}, month = {2018 Mar 20}, pages = {1-7}, abstract = {

INTRODUCTION: Human Beta Defensin-1 (hBD-1) is a component of the innate immune system, the first line of defence against pathogens, already reported as involved in the susceptibility to HIV-1 infection and HIV-1 mother-to-child transmission (MTCT) in different populations. We investigated the role of DEFB1 gene (encoding for hBD-1) functional polymorphisms in the susceptibility to HIV-1 MTCT in a population from Zambia.

METHODS: Four selected polymorphisms within DEFB1 gene, three at the 5{\textquoteright} untranslated region (UTR), namely -52G > A (rs1799946), -44C > G (rs1800972) and -20G > A (rs11362) and one in the 3{\textquoteright}UTR, c.*87A > G (rs1800972), were genotyped in 101 HIV-1 positive mothers (26 transmitters -27\% and 75 not transmitters -73\%) and 331 infants born to HIV-1 infected mothers (85 HIV-1 positive -26\% and 246 exposed but not infected -74\%).

RESULTS: DEFB1 c.*87-A allele was more frequent among HIV- children with respect to HIV+ (with intrauterine MTCT). Concerning DEFB1 haplotypes, GCGA haplotype resulted more represented in HIV- than HIV+ infants and DEFB1 ACGG haplotype presented increased frequency in HIV- children respect to HIV+ (with intra-partum MTCT) (p = .02, p = .002 and p = .006, respectively).

CONCLUSIONS: DEFB1 polymorphisms were significantly associated with decreased risk of HIV-1 infection acquisition in the studied Zambian population suggesting that they may play a role in HIV-1 MTCT.

}, issn = {1476-4954}, doi = {10.1080/14767058.2018.1449206}, author = {Zupin, Luisa and Polesello, Vania and Segat, Ludovica and Kamada, Anselmo Jiro and Kuhn, Louise and Crovella, Sergio} } @article {10796, title = {Human beta defensin-1 is involved in the susceptibility to adeno-tonsillar hypertrophy.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {107}, year = {2018}, month = {2018 Apr}, pages = {135-139}, abstract = {

INTRODUCTION: Innate immunity molecules are known to play a pivotal role in the homeostasis of the oral mucosa, permitting the presence of commensal microflora and, at the same time, providing a first line of defense against pathogens attempting to invade the oral cavity. Tonsils represent the local immune tissue in oral cavity, being able to provide a non-specific response to pathogens; however, in the presence of microbes or foreign materials present in the mouth tonsils could became infected and develop chronic inflammation, thus leading to hypertrophy. The etiology of the disease is multifactorial depending upon environmental and host factors, the latter including molecules of mucosal innate immunity.

METHODS: Ninety-five children with adeno-tonsillar hypertrophy subjected to adeno-tonsillectomy were recruited at the pediatric otorhinolaryngology service of the Institute for Maternal and Child Health IRCCS Burlo Garofolo, Trieste (Italy). The specimen discarded from the surgery were used for genomic DNA extraction and genotyping, for mRNA extraction and gene expression analysis, finally the samples were cut and used to prepare slides to perform immunohistochemistry.

RESULTS: Functional polymorphisms within DEFB1 gene, encoding the human beta defensin-1 (hBD-1), were analyzed finding association between DEFB1 rare haplotypes and susceptibility to adeno-tonsillar hypertrophy. DEFB1 mRNA expression was detected in the tonsils and the hBD-1 protein was localized at the epithelia of tonsils mainly in the proximity of the basal lamina.

CONCLUSION: Our findings lead us to hypothesize an involvement of hBD-1 mediated innate immunity in the modulation of the susceptibility towards adeno-tonsillar hypertrophy development.

}, keywords = {Adenoidectomy, Adenoids, Adolescent, beta-Defensins, Child, Child, Preschool, Female, Genetic Predisposition to Disease, Genotype, Haplotypes, Humans, Hypertrophy, Immunity, Innate, Immunohistochemistry, Italy, Male, Palatine Tonsil, Tonsillectomy}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2018.01.041}, author = {Zupin, Luisa and Celsi, Fulvio and Bresciani, Martina and Orzan, Eva and Grasso, Domenico Leonardo and Crovella, Sergio} } @article {10832, title = {Photobiomodulation at Multiple Wavelengths Differentially Modulates Oxidative Stress and .}, journal = {Oxid Med Cell Longev}, volume = {2018}, year = {2018}, month = {2018}, pages = {6510159}, abstract = {

Photobiomodulation (PBM) is emerging as an effective strategy for the management of multiple inflammatory conditions, including oral mucositis (OM) in cancer patients who receive chemotherapy or radiotherapy. Still, the poor understanding of the mechanisms by which the light interacts with biological tissues and the heterogeneity of light sources and protocols employed worldwide significantly limits its applicability. Reactive oxygen species (ROS) are massively generated during the early phases of OM and play a major role in the pathogenesis of inflammation in general. Here, we report the results of a clinical and experimental study, aimed at evaluating the effect of laser light at different wavelengths on oxidative stress in oncologic patients suffering from OM and in two cell types abundantly present within the inflamed oral mucosa, neutrophil polymorphonuclear (PMN) granulocytes, and keratinocytes. In addition to standard ROS detection methods, we exploited a roGFP2-Orp1 genetically encoded sensor, allowing specific, quantitative, and dynamic imaging of redox events in living cells in response to oxidative stress and PBM. We found that the various wavelengths differentially modulate ROS production. In particular, the 660 nm laser light increases ROS production when applied either before or after an oxidative stimulus. In contrast, the 970 nm laser light exerted a moderate antioxidant activity both in the saliva of OM patients and in both cell types. The most marked reduction in the levels of ROS was detected in cells exposed either to the 800 nm laser light or to the combination of the three wavelengths. Overall, our study demonstrates that PBM exerts different effects on the redox state of both PMNs and keratinocytes depending on the used wavelength and prompts the validation of a multiwavelength protocol in the clinical settings.

}, keywords = {Adult, Aged, Aged, 80 and over, Female, Humans, Keratinocytes, Lasers, Semiconductor, Low-Level Light Therapy, Male, Middle Aged, Neutrophils, Oxidation-Reduction, Oxidative Stress, Stomatitis}, issn = {1942-0994}, doi = {10.1155/2018/6510159}, author = {Rupel, Katia and Zupin, Luisa and Colliva, Andrea and Kamada, Anselmo and Poropat, Augusto and Ottaviani, Giulia and Gobbo, Margherita and Fanfoni, Lidia and Gratton, Rossella and Santoro, Massimo and Di Lenarda, Roberto and Biasotto, Matteo and Zacchigna, Serena} } @article {10471, title = {DEFB1 polymorphisms and salivary hBD-1 concentration in Oral Lichen Planus patients and healthy subjects.}, journal = {Arch Oral Biol}, volume = {73}, year = {2017}, month = {2017 Jan}, pages = {161-165}, abstract = {

OBJECTIVES: The aetiology of Oral Lichen Planus (OLP), a chronic inflammatory disease of oral mucosa, is not yet well understood. Since innate immunity may be hypothesized as involved in the susceptibility to OLP, we studied human beta defensin 1 (hBD-1) an antimicrobial peptide constitutively expressed in the saliva, looking at functional genetic variants possibly able to diminish hBD-1 production an consequently conferring major susceptibility to OLP.

DESIGN: We analysed three DEFB1 polymorphisms at 5{\textquoteright} UTR, -52G>A (rs1799946), -44C>G (rs1800972), -20G>A (rs11362) and two DEFB1 polymorphisms at 3{\textquoteright}UTR, c*5G>A (rs1047031), c*87A>G (rs1800971), with the aim of correlating these genetic variants and hBD-1 salivary level in a group of OLP patients and in healthy subjects. We also evaluated hBD-1 salivary concentrations, using ELISA, in OLP and healthy controls.

RESULTS: We compared hBD-1 concentrations in OLP and healthy subjects: hBD-1 concentration was significantly higher in OLP patients respect to control. When considering the correlation between DEFB1 polymorphisms genotypes and hBD-1 expression levels, significant results were obtained for SNPs -52G>A (p=0.03 both in OLP patients and healthy individuals) and -44C>G (p=0.02 in OLP patients).

CONCLUSIONS: hBD-1 production was different between OLP and healthy subjects (not age-matched with OLP). DEFB1 gene polymorphisms, -52G>A and -44C>G, correlated with hBD-1 salivary concentrations.

}, keywords = {5{\textquoteright} Untranslated Regions, Adult, Aged, Aged, 80 and over, beta-Defensins, Female, Genetic Predisposition to Disease, Genotype, Humans, Lichen Planus, Oral, Male, Middle Aged, Polymorphism, Single Nucleotide, Saliva, Sequence Analysis, DNA}, issn = {1879-1506}, doi = {10.1016/j.archoralbio.2016.10.008}, author = {Polesello, Vania and Zupin, Luisa and Di Lenarda, Roberto and Biasotto, Matteo and Pozzato, Gabriele and Ottaviani, Giulia and Gobbo, Margherita and Crovella, Sergio and Segat, Ludovica} } @article {8502, title = {CD209 promoter polymorphisms associate with HCV infection and pegylated-interferon plus ribavirin treatment response.}, journal = {Mol Immunol}, volume = {76}, year = {2016}, month = {2016 Aug}, pages = {49-54}, abstract = {

Hepatitis C is a severe liver disease caused by hepatitis C virus that could persist in the host causing progression towards chronic disease in about 80\% of the cases. Pegylated-interferon plus ribavirin was the gold standard therapy, however treatment{\textquoteright}s response was quite variable among individuals and different host/viral factors may play a role in disease outcome. The cluster of differentiation 209 (CD209 antigen) is a component of the innate immune system able to recognize HCV and consequently activating the immune response. We enrolled 203 Italian HCV infected patients and 220 healthy controls investigating if five promoter polymorphisms within CD209 gene (encoding for CD209 antigen) correlated with HCV infection susceptibility, spontaneous viral clearance and interferon treatment response. CD209 -939G>A and -871A>G polymorphisms associated with HCV infection susceptibility, while, CD209 -871A>G and -336A>G polymorphisms associated with response to treatment. In conclusion, CD209 polymorphisms could play a role in the susceptibility to HCV infection as well as interferon treatment response in our study population from North-East of Italy.

}, issn = {1872-9142}, doi = {10.1016/j.molimm.2016.06.009}, author = {Zupin, Luisa and Polesello, Vania and Alberi, Giulia and Moratelli, Giulia and Croc{\`e}, Saveria Lory and Masutti, Flora and Pozzato, Gabriele and Crovella, Sergio and Segat, Ludovica} } @article {8486, title = {DEFB1 polymorphisms and susceptibility to recurrent tonsillitis in Italian children.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {83}, year = {2016}, month = {2016 Apr}, pages = {12-5}, abstract = {

INTRODUCTION: The tonsils are secondary lymphoid organs fundamental for immune system response against pathogens within the oral cavity. Tonsillitis refers to inflammation of the pharyngeal tonsils that may include the adenoids and the lingual tonsils and that can be acute, recurrent, and chronic. Viral or bacterial infections, as well as immunologic factors are the main trigger to tonsillitis and disease{\textquoteright}s chronicity: the host immune responses, especially the innate one, could play an important role in susceptibility to the disease.

OBJECTIVES: The current study aims at investigating the role of functional polymorphisms in the 5{\textquoteright}UTR (c.-52G>A, c.-44G>C and c.-20G>A) of DEFB1 gene, encoding for the antimicrobial peptide human beta-defensin 1, in the predisposition to recurrent tonsillitis in children from North Eastern Italy.

RESULTS: No significant correlation was found between DEFB1 allele, genotype and haplotype frequencies and recurrent tonsillitis susceptibility with the exception of an increased risk to disease development in patients carrying DEFB1 rare haplotypes.

CONCLUSION: Our results may suggest that DEFB1 polymorphisms alone may not influence pathology susceptibility, however they could possibly concur, together with other factors involved in the genetic control of innate immune system, in the predisposition towards recurrent tonsillitis.

}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2016.01.025}, author = {Zupin, Luisa and Polesello, Vania and Grasso, Domenico Leonardo and Crovella, Sergio and Segat, Ludovica} } @article {8300, title = {Iron signature in asbestos-induced malignant pleural mesothelioma: A population-based autopsy study.}, journal = {J Toxicol Environ Health A}, volume = {79}, year = {2016}, month = {2016}, pages = {129-41}, abstract = {

Malignant pleural mesothelioma (MPM) is an aggressive cancer with poor prognosis. The development of MPM is frequently linked to inhalation of asbestos fibers. A genetic component of susceptibility to this disease is suggested by the observation that some individuals develop MPM following lower doses of asbestos exposure, whereas others exposed to higher quantities do not seem to be affected. This hypothesis is supported also by frequent reports of MPM familial clustering. Despite the widely recognized role of iron (Fe) in cellular asbestos-induced pulmonary toxicity, the role of the related gene polymorphisms in the etiology of MPM has apparently not been evaluated. Eighty-six single-nucleotide polymorphisms (SNPs) of 10 Fe-metabolism genes were examined by exploiting formalin-fixed paraffin-embedded postmortem samples from 77 patients who died due to MPM (designated AEM) and compared with 48 who were exposed to asbestos but from died in old age of cause other than asbestos (designated AENM). All subjects showed objective signs of asbestos exposure. Three SNPs, localized in the ferritin heavy polypeptide, transferrin, and hephaestin genes, whose frequencies were distributed differently in AEM and AENM populations, were identified. For ferritin and transferrin the C/C and the G/G genotypes, respectively, representing intronic polymorphisms, were significantly associated with protection against MPM and need to be considered as possible genetic markers of protection. Similarly, the C/C hephaestin SNP, a missense variation of this multicopper ferroxidase encoding gene, may be related, also functionally, with protection against MPM. In conclusion, it is proposed that three Fe metabolism-associated genes, significantly associated with protection against development of MPM, may serve as protective markers for this aggressive tumor.

}, keywords = {Adult, Aged, Asbestos, Autopsy, Case-Control Studies, Female, Ferritins, Gene Frequency, Genetic Markers, Humans, Iron, Lung Neoplasms, Male, Membrane Proteins, Mesothelioma, Middle Aged, Mutation, Missense, Polymorphism, Single Nucleotide, Transferrin, Young Adult}, issn = {1528-7394}, doi = {10.1080/15287394.2015.1123452}, author = {Crovella, Sergio and Bianco, Anna Monica and Vuch, Joseph and Zupin, Luisa and Moura, Ronald Rodrigues and Trevisan, Elisa and Schneider, Manuela and Brollo, Alessandro and Nicastro, Enza Maria and Cosenzi, Alessandro and Zabucchi, Giuliano and Borelli, Violetta} } @article {8514, title = {Lactoferrin gene polymorphisms in Italian patients with recurrent tonsillitis.}, journal = {Int J Pediatr Otorhinolaryngol}, volume = {88}, year = {2016}, month = {2016 Sep}, pages = {153-6}, abstract = {

INTRODUCTION: Recurrent tonsillitis is an oral pathology characterized by inflammation of tonsils. The disease susceptibility depends upon environmental and host factors, specifically the innate immune response, the first line of host defence could play an important role. Among innate immunity members, lactoferrin, known for its antimicrobial properties, was previously correlated with the risk of oral pathology as periodontitis and dental caries.

METHODS: 89 Italian children presenting recurrent tonsillitis and 95 healthy children were genotyped for two LTF non-synonymous polymorphisms, called Thr29Ala and Arg47Lys, in order to investigate their potential role in recurrent tonsillitis susceptibility.

RESULTS: no different allele, genotype and haplotype frequency distributions were detected comparing patients and controls.

CONCLUSION: data from the current study indicate that LTF polymorphisms might not be involved in recurrent tonsillitis development in our Italian population. However, since the importance of lactoferrin in oral immunity has been previously assessed, further studies should be necessary to unravel the potential role of LTF genetic variants in oral cavity.

}, issn = {1872-8464}, doi = {10.1016/j.ijporl.2016.07.002}, author = {Zupin, Luisa and Angelelli, Francesco and Grasso, Domenico Leonardo and Crovella, Sergio} } @article {8287, title = {MBL2 genetic polymorphisms and HIV-1 mother-to-child transmission in Zambia.}, journal = {Immunol Res}, volume = {64}, year = {2016}, month = {2016 Jun}, pages = {775-84}, abstract = {

Since antiretroviral drugs have been introduced to prevent mother-to-child transmission, the risk of HIV-1 infection in infants has decreased considerably worldwide. Nevertheless, many factors are involved in viral transmission and host susceptibility to infection. The immune system and its components, including mannose binding protein C (encoding by MBL2 gene), are already known to play an important role in this scenario. In the present study, 313 children and 98 of their mothers from Zambia were genotyped for the MBL2 promoter HL (rs11003125) and XY (rs7096206) polymorphisms and exon 1 D (rs5030737, at codon 52) B (rs1800450, at codon 54) and C (rs1800451, at codon 57) polymorphisms in order to investigate the potential role of these genetic variants in HIV-1 mother-to-child transmission. No statistical significant association was observed comparing transmitter and non-transmitter mothers and also confronting HIV-positive and HIV-negative children. The findings of the current study obtained on mother and children from Zambia evidence lack of association between MBL2 functional polymorphisms and HIV-1 mother-to-child transmission.

}, issn = {1559-0755}, doi = {10.1007/s12026-015-8779-1}, author = {Zupin, Luisa and Polesello, Vania and Segat, Ludovica and Kuhn, Louise and Crovella, Sergio} } @article {8306, title = {Protective Role of BST2 Polymorphisms in Mother-to-Child Transmission of HIV-1 and Adult AIDS Progression.}, journal = {J Acquir Immune Defic Syndr}, volume = {72}, year = {2016}, month = {2016 Jul 1}, pages = {237-41}, abstract = {

Bone marrow stromal cell antigen-2 (BST-2)/Tetherin is a restriction factor that prevents Human immunodeficiency virus type 1 (HIV-1) release from infected cells and mediates pro-inflammatory cytokine production. This study investigated the risk conferred by single nucleotide polymorphisms (rs919266, rs9192677, and rs9576) at BST-2 coding gene (BST2) in HIV-1 mother-to-child transmission and in disease progression. Initially, 101 HIV-1+ pregnant women and 331 neonates exposed to HIV-1 from Zambia were enrolled. Additional BST2 single nucleotide polymorphism analyses were performed in 2 cohorts with acquired immunodeficiency syndrome (AIDS) progression: an adult Brazilian cohort (37 rapid, 30 chronic and 21 long-term non-progressors) and an Italian pediatric cohort (21 rapid and 67 slow progressors). The rs9576A allele was nominally associated with protection during breastfeeding (P = 0.019) and individuals carrying rs919266 GA showed slower progression to AIDS (P = 0.033). Despite the influence of rs919266 and rs9576 on BST2 expression being still undetermined, a preventive role by BST2 polymorphisms was found during HIV-1 infection.

}, issn = {1944-7884}, doi = {10.1097/QAI.0000000000000949}, author = {Kamada, Anselmo J and Bianco, Anna M and Zupin, Luisa and Girardelli, Martina and Matte, Maria C C and Medeiros, R{\'u}bia Mar{\'\i}lia de and Almeida, Sabrina Esteves de Matos and Rocha, Marineide M and Segat, Ludovica and Chies, Jos{\'e} A B and Kuhn, Louise and Crovella, Sergio} } @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 {7684, title = {Impact of DEFB1 gene regulatory polymorphisms on hBD-1 salivary concentration.}, journal = {Arch Oral Biol}, volume = {60}, year = {2015}, month = {2015 Jul}, pages = {1054-8}, abstract = {

OBJECTIVES: Human β-defensin 1 (hBD-1) is an antimicrobial peptide involved in epithelial defence of various tissues, also present in the saliva. Individual genetic variations within the DEFB1 gene, encoding for hBD-1, could influence gene expression and protein production.

DESIGN: Three DEFB1 polymorphisms at 5{\textquoteright} untranslated region (UTR), -52G > A (rs1799946), -44C > G (rs1800972) and -20G > A (rs11362), and two polymorphisms at DEFB1 3{\textquoteright} UTR, c*5G > A (rs1047031) and c*87A > G (rs1800971), were analysed by direct sequencing and correlated with hDB-1 salivary concentration (tested with enzyme-linked immunosorbent assay (ELISA)) in 40 healthy subjects.

RESULTS: Significant associations were found between individuals presenting different DEFB1 polymorphisms at positions -52 and -44 of the gene and hBD-1 salivary concentrations: -52 G/G carriers had higher levels of protein than G/A and A/A; -44C/G subjects showed a higher protein concentration than homozygous wild-type C/C. For the -20G > A, c*5G > A and c*87A > G polymorphisms, no statistically significant differences were found. Combined haplotype analysis confirmed the results obtained considering the single-nucleotide polymorphisms (SNPs) singularly.

CONCLUSION: Polymorphisms in the DEFB1 gene influence hBD-1 production and, therefore, could modify the innate immune system responses and, consequently, the oral health.

}, issn = {1879-1506}, doi = {10.1016/j.archoralbio.2015.03.009}, author = {Polesello, Vania and Zupin, Luisa and Di Lenarda, Roberto and Biasotto, Matteo and Ottaviani, Giulia and Gobbo, Margherita and Cecco, Luca and Alberi, Giulia and Pozzato, Gabriele and Crovella, Sergio and Segat, Ludovica} } @article {3616, title = {Interleukin-18 gene promoter polymorphisms and celiac disease in Italian patients.}, journal = {Mol Biol Rep}, volume = {42}, year = {2015}, month = {2015 Feb}, pages = {525-33}, abstract = {

Celiac disease (CD) is the most common food-sensitive enteropathy in genetically susceptible individuals. The major genetic risk factors known are specific human leukocyte antigen (HLA)-DQ haplotypes, but other genetic factors are supposed to be involved. Interleukin-18 (IL-18) is a pro-inflammatory cytokine that has an important role in the immune defense and it has the potential to influence inflammatory disorders. IL-18 is able to promote Th1 cell development and it is expressed in the mucosa of the small intestine in celiac patients. Given the IL-18 biological role, and since a few studies have previously suggested its involvement in CD, in order to investigate the role of IL18 gene in the susceptibility to CD we have performed a case-control study, analyzing two IL18 gene promoter polymorphisms, previously reported to impair the transcriptional activity of the gene, (-137G > C and -607C > A, rs187238 and rs1946518 respectively). A total of 556 CD Italian patients and 582 controls, further stratified for HLA class II (DQ) CD risk haplotypes were enrolled. The -607A > C A allele and A/A genotype, as well as the combination of this allele with the -137G allele in the AG haplotype, were associated with an increased risk towards CD development, in particular in HLA-DQ2.2 patients. Although the association was very moderate, our results indicate the possible involvement of IL18 gene in the susceptibility to CD, and for this reason we do think it should deserve further investigation.

}, issn = {1573-4978}, doi = {10.1007/s11033-014-3796-z}, author = {Zupin, Luisa and Catamo, Eulalia and Polesello, Vania and Crovella, Sergio and Segat, Ludovica} } @article {7683, title = {Lactotransferrin gene functional polymorphisms do not influence susceptibility to human immunodeficiency virus-1 mother-to-child transmission in different ethnic groups.}, journal = {Mem Inst Oswaldo Cruz}, volume = {110}, year = {2015}, month = {2015 Apr}, pages = {222-9}, abstract = {

Lactotransferrin, also known as lactoferrin, is an iron binding glycoprotein that displays antiviral activity against many different infectious agents, including human immunodeficiency virus (HIV)-1. Lactotransferrin is present in the breast milk and in the female genitourinary mucosa and it has been hypothesised as a possible candidate to prevent mother-to-child HIV-1 transmission. To verify if two functional polymorphisms, Thr29Ala and Arg47Lys, in the lactotransferrin encoding gene (LTF) could affect HIV-1 infection and vertical transmission, a preliminary association study was performed in 238 HIV-1 positive and 99 HIV-1 negative children from Brazil, Italy, Africa and India. No statistically significant association for the Thr29Ala and Arg47Lys LTF polymorphisms and HIV-1 susceptibility in the studied populations was found. Additionally LTF polymorphisms frequencies were compared between the four different ethnic groups.

}, keywords = {Acquired Immunodeficiency Syndrome, Adolescent, Brazil, Child, Cohort Studies, Ethnic Groups, Female, Gene Frequency, Genetic Predisposition to Disease, Genotyping Techniques, HIV-1, Humans, India, Infant, Newborn, Infectious Disease Transmission, Vertical, Italy, Lactoferrin, Male, Polymorphism, Single Nucleotide, Real-Time Polymerase Chain Reaction, Retrospective Studies, Zimbabwe}, issn = {1678-8060}, doi = {10.1590/0074-02760140447}, author = {Zupin, Luisa and Polesello, Vania and Coelho, Ant{\^o}nio Victor Campos and Boniotto, Michele and Arraes, Luiz Claudio and Segat, Ludovica and Crovella, Sergio} } @article {7758, title = {MBL2 polymorphisms in women with atypical squamous cells of undetermined significance.}, journal = {J Med Virol}, volume = {87}, year = {2015}, month = {2015 May}, pages = {851-9}, abstract = {

Infection with high risk Human papillomavirus (HPV) is the main known cause of cervical cancer. HPV induces different grades of lesions: among them, Atypical squamous cells of undetermined significance are abnormal lesions that could evolve in pre-cancer lesions or spontaneously regress. The mannose binding lectin (MBL) is an innate immunity serum protein also found in cervico-vaginal mucosa, whose expression is known to be affected by polymorphisms in exon 1 and promoter of the MBL2 gene. In the present study the possible association between MBL2 functional polymorphisms and susceptibility to develop atypical squamous cells of undetermined significance was investigated in a group of women from North-East of Italy, stratified for HPV infection status. The MBL2 D and O alleles and the deficient producer combined genotypes, responsible for low MBL production, were more represented among atypical squamous cells of undetermined significance positive women than healthy controls and the results were confirmed when only HPV negative samples were considered. These results suggest a possible involvement of MBL2 functional polymorphisms in atypical squamous cells of undetermined significance susceptibility.

}, keywords = {Adolescent, Adult, Atypical Squamous Cells of the Cervix, Female, Gene Frequency, Genetic Predisposition to Disease, Humans, Italy, Mannose-Binding Lectin, Polymorphism, Single Nucleotide, Young Adult}, issn = {1096-9071}, doi = {10.1002/jmv.24080}, author = {Zupin, Luisa and Polesello, Vania and Casalicchio, Giorgia and Freato, Nadia and Maestri, Iva and Comar, Manola and Crovella, Sergio and Segat, Ludovica} } @article {3623, title = {DEFB1 polymorphisms are involved in susceptibility to human papillomavirus infection in Brazilian gynaecological patients.}, journal = {Mem Inst Oswaldo Cruz}, volume = {109}, year = {2014}, month = {2014 Nov}, pages = {918-22}, abstract = {

The human beta defensin 1 (hBD-1) antimicrobial peptide is a member of the innate immune system known to act in the first line of defence against microorganisms, including viruses such as human papillomavirus (HPV). In this study, five functional polymorphisms (namely g-52G>A, g-44C>G and g-20G>A in the 5{\textquoteright}UTR and c.*5G>A and c.*87A>G in the 3{\textquoteright}UTR) in the DEFB1 gene encoding for hBD-1 were analysed to investigate the possible involvement of these genetic variants in susceptibility to HPV infection and in the development of HPV-associated lesions in a population of Brazilian women. The DEFB1 g-52G>A and c.*5G>A single-nucleotide polymorphisms (SNPs) and the GCAAA haplotype showed associations with HPV-negative status; in particular, the c.*5G>A SNP was significantly associated after multiple test corrections. These findings suggest a possible role for the constitutively expressed beta defensin-1 peptide as a natural defence against HPV in the genital tract mucosa.

}, keywords = {Adolescent, Adult, Aged, beta-Defensins, Brazil, Case-Control Studies, Female, Genetic Predisposition to Disease, Haplotypes, Humans, Middle Aged, Papillomavirus Infections, Polymorphism, Single Nucleotide, Reproductive Tract Infections, Young Adult}, issn = {1678-8060}, author = {Segat, Ludovica and Zupin, Luisa and Moura, Ronald Rodrigues and Coelho, Ant{\^o}nio Victor Campos and Chagas, B{\'a}rbara Simas and de Freitas, Antonio Carlos and Crovella, Sergio} } @article {3523, title = {Interleukin-10 gene promoter polymorphisms in celiac patients from north-eastern Italy.}, journal = {Hum Immunol}, volume = {75}, year = {2014}, month = {2014 Jul}, pages = {656-61}, abstract = {

Celiac disease is a complex chronic intestinal disorder driven by an immune response against the gliadin fraction of gluten: many factors are involved in the pathogenesis of the disease, and among these Interleukin-10 could play an important role. In the present study, the -1082A>G, -819T>C and -592A>C IL10 functional polymorphisms were analyzed in 565 celiac patients and 576 healthy controls from north-eastern Italy, stratified for HLA class II celiac disease risk haplotypes. No significant differences were observed for the three IL10 polymorphisms distribution between celiac patients and controls with the exception of a slightly increased risk for the -1082A allele in HLA-DQ8 male individuals. Although our findings suggest that the IL10 genetic variants analyzed do not have a major role in the susceptibility to the development of celiac disease in north-eastern Italian patients, we think that the possible involvement of IL10 gene in CD should deserve further investigation and that large-scale studies are recommended to confirm our findings.

}, keywords = {Adolescent, Adult, Aged, Aged, 80 and over, Alleles, Case-Control Studies, Celiac Disease, Child, Child, Preschool, European Continental Ancestry Group, Female, Gene Frequency, HLA-DQ Antigens, Humans, Interleukin-10, Italy, Male, Middle Aged, Models, Genetic, Polymorphism, Single Nucleotide, Promoter Regions, Genetic, Risk Factors, Sex Factors}, issn = {1879-1166}, doi = {10.1016/j.humimm.2014.04.011}, author = {Zupin, Luisa and Polesello, Vania and Catamo, Eulalia and Crovella, Sergio and Segat, Ludovica} } @article {3603, title = {Non-classical MHC-I human leukocyte antigen (HLA-G) in hepatotropic viral infections and in hepatocellular carcinoma.}, journal = {Hum Immunol}, volume = {75}, year = {2014}, month = {2014 Dec}, pages = {1225-31}, abstract = {

The human leukocyte antigen (HLA)-G is a "nonclassical" major histocompatibility complex (MHC) class Ib gene, located at chromosome 6, in the 6p21.3 region. The HLA-G presents immunomodulatory functions essential in pregnancy for the tolerance of the semi-allogenic fetus, but an abnormal expression of HLA-G has been observed in numerous pathological conditions, such as tumors, autoimmune diseases and viral infections. In recent years, numerous studies have assessed the clinical relevance of HLA-G expression in different types of cancer: in general, a higher HLA-G expression correlates with a lower survival rate or a shorter disease-free survival. Altered expression of HLA-G has been found in both HCV and HBV infection, and some genetic polymorphisms have been associated with altered susceptibility/disease development for these infections, however, whether the biologic role of HLA-G in HCV and HBV infection is beneficial or hazardous, it is not completely clear. In the context of hepatocellular carcinoma, HLA-G has shown a potential diagnostic role, moreover a prognostic value in HCC patients has been also attributed to HLA-G molecules. We revise here the role of HLA-G in hepatotropic HBV/HCV infections and in hepatocellular carcinoma (HCC).

}, keywords = {Carcinoma, Hepatocellular, Female, Genetic Predisposition to Disease, Hepatitis B, Hepatitis C, HLA-G Antigens, Humans, Immune Tolerance, Liver Neoplasms, Polymorphism, Genetic, Pregnancy}, issn = {1879-1166}, doi = {10.1016/j.humimm.2014.09.019}, author = {Catamo, Eulalia and Zupin, Luisa and Crovella, Sergio and Celsi, Fulvio and Segat, Ludovica} }