@article {10835, title = {PR interval genome-wide association meta-analysis identifies 50 loci associated with atrial and atrioventricular electrical activity.}, journal = {Nat Commun}, volume = {9}, year = {2018}, month = {2018 07 25}, pages = {2904}, abstract = {

Electrocardiographic PR interval measures atrio-ventricular depolarization and conduction, and abnormal PR interval is a risk factor for atrial fibrillation and heart block. Our genome-wide association study of over 92,000 European-descent individuals identifies 44 PR interval loci (34 novel). Examination of these loci reveals known and previously not-yet-reported biological processes involved in cardiac atrial electrical activity. Genes in these loci are over-represented in cardiac disease processes including heart block and atrial fibrillation. Variants in over half of the 44 loci were associated with atrial or blood transcript expression levels, or were in high linkage disequilibrium with missense variants. Six additional loci were identified either by meta-analysis of ~105,000 African and European-descent individuals and/or by pleiotropic analyses combining PR interval with heart rate, QRS interval, and atrial fibrillation. These findings implicate developmental pathways, and identify transcription factors, ion-channel genes, and cell-junction/cell-signaling proteins in atrio-ventricular conduction, identifying potential targets for drug development.

}, keywords = {Atrial Function, Atrioventricular Node, Electrocardiography, Electrophysiological Phenomena, Female, Genome-Wide Association Study, Humans, Linkage Disequilibrium, Male, Mutation, Missense, Risk Factors}, issn = {2041-1723}, doi = {10.1038/s41467-018-04766-9}, author = {van Setten, Jessica and Brody, Jennifer A and Jamshidi, Yalda and Swenson, Brenton R and Butler, Anne M and Campbell, Harry and Del Greco, Fabiola M and Evans, Daniel S and Gibson, Quince and Gudbjartsson, Daniel F and Kerr, Kathleen F and Krijthe, Bouwe P and Lyytik{\"a}inen, Leo-Pekka and M{\"u}ller, Christian and M{\"u}ller-Nurasyid, Martina and Nolte, Ilja M and Padmanabhan, Sandosh and Ritchie, Marylyn D and Robino, Antonietta and Smith, Albert V and Steri, Maristella and Tanaka, Toshiko and Teumer, Alexander and Trompet, Stella and Ulivi, Sheila and Verweij, Niek and Yin, Xiaoyan and Arnar, David O and Asselbergs, Folkert W and Bader, Joel S and Barnard, John and Bis, Josh and Blankenberg, Stefan and Boerwinkle, Eric and Bradford, Yuki and Buckley, Brendan M and Chung, Mina K and Crawford, Dana and den Hoed, Marcel and Denny, Josh C and Dominiczak, Anna F and Ehret, Georg B and Eijgelsheim, Mark and Ellinor, Patrick T and Felix, Stephan B and Franco, Oscar H and Franke, Lude and Harris, Tamara B and Holm, Hilma and Ilaria, Gandin and Iorio, Annamaria and K{\"a}h{\"o}nen, Mika and Kolcic, Ivana and Kors, Jan A and Lakatta, Edward G and Launer, Lenore J and Lin, Honghuang and Lin, Henry J and Loos, Ruth J F and Lubitz, Steven A and Macfarlane, Peter W and Magnani, Jared W and Leach, Irene Mateo and Meitinger, Thomas and Mitchell, Braxton D and Munzel, Thomas and Papanicolaou, George J and Peters, Annette and Pfeufer, Arne and Pramstaller, Peter P and Raitakari, Olli T and Rotter, Jerome I and Rudan, Igor and Samani, Nilesh J and Schlessinger, David and Silva Aldana, Claudia T and Sinner, Moritz F and Smith, Jonathan D and Snieder, Harold and Soliman, Elsayed Z and Spector, Timothy D and Stott, David J and Strauch, Konstantin and Tarasov, Kirill V and Thorsteinsdottir, Unnur and Uitterlinden, Andr{\'e} G and Van Wagoner, David R and V{\"o}lker, Uwe and V{\"o}lzke, Henry and Waldenberger, Melanie and Jan Westra, Harm and Wild, Philipp S and Zeller, Tanja and Alonso, Alvaro and Avery, Christy L and Bandinelli, Stefania and Benjamin, Emelia J and Cucca, Francesco and D{\"o}rr, Marcus and Ferrucci, Luigi and Gasparini, Paolo and Gudnason, Vilmundur and Hayward, Caroline and Heckbert, Susan R and Hicks, Andrew A and Jukema, J Wouter and K{\"a}{\"a}b, Stefan and Lehtim{\"a}ki, Terho and Liu, Yongmei and Munroe, Patricia B and Parsa, Afshin and Polasek, Ozren and Psaty, Bruce M and Roden, Dan M and Schnabel, Renate B and Sinagra, Gianfranco and Stefansson, Kari and Stricker, Bruno H and van der Harst, Pim and van Duijn, Cornelia M and Wilson, James F and Gharib, Sina A and de Bakker, Paul I W and Isaacs, Aaron and Arking, Dan E and Sotoodehnia, Nona} } @article {8295, title = {Pharmacogenetics driving personalized medicine: analysis of genetic polymorphisms related to breast cancer medications in Italian isolated populations.}, journal = {J Transl Med}, volume = {14}, year = {2016}, month = {2016}, pages = {22}, abstract = {

BACKGROUND: Breast cancer is the most common cancer in women characterized by a high variable clinical outcome among individuals treated with equivalent regimens and novel targeted therapies. In this study, we performed a population based approach intersecting high-throughput genotype data from Friuli Venezia Giulia (FVG) isolated populations with publically available pharmacogenomics information to estimate the frequency of genotypes correlated with responsiveness to breast cancer treatment thus improving the clinical management of this disease in an efficient and cost effective way.

METHODS: A list of 80 variants reported to be related to the efficacy or toxicity of breast cancer drugs was obtained from PharmGKB database. Fourty-one were present in FVG, 1000G European (EUR) and ExAC (Non Finnish European) databases. Their frequency was extracted using PLINK software and the differences tested by Fisher{\textquoteright}s exact test.

RESULTS: Statistical analyses revealed that 13 out of the 41 (32 \%) variants were significantly different in frequency in our sample as compared to the EUR/ExAC cohorts. For nine variants the available level of evidence (LOE) included polymorphisms related to cyclophosphamide, tamoxifen, doxorubicin, fluorpyrimidine and paclitaxel. In particular, for trastuzumab two variants were detected: (1) rs1801274-G within FCGR2A and associated with decreased efficacy (LOE 2B); (2) rs1136201-G located within ERBB2 and associated with increased toxicity (LOE 3). Both these two variants were underrepresented in the FVG population compared to EUR/ExAC population thus suggesting a high therapeutic index of this drug in our population. Moreover, as regards fluoropyrimidines, the frequency of two polymorphisms within the DPYD gene associated with drug toxicity (e.g., rs2297595-C allele and rs3918290-T allele, LOE 2A and 1, respectively) was extremely low in FVG population thus suggesting that a larger number of FVG patients could benefit from full dosage of fluoropyrimidine therapy.

CONCLUSIONS: All these findings increase the overall knowledge on the prevalence of specific variants related with breast cancer treatment responsiveness in FVG population and highlight the importance of assessing gene polymorphisms related with cancer medications in isolated communities.

}, issn = {1479-5876}, doi = {10.1186/s12967-016-0778-z}, author = {Cocca, Massimiliano and Bedognetti, Davide and La Bianca, Martina and Gasparini, Paolo and Girotto, Giorgia} } @article {7740, title = {The p.Cys169Tyr variant of connexin 26 is not a polymorphism.}, journal = {Hum Mol Genet}, volume = {24}, year = {2015}, month = {2015 May 1}, pages = {2641-8}, abstract = {

Mutations in the GJB2 gene, which encodes the gap junction protein connexin 26 (Cx26), are the primary cause of hereditary prelingual hearing impairment. Here, the p.Cys169Tyr missense mutation of Cx26 (Cx26C169Y), previously classified as a polymorphism, has been identified as causative of severe hearing loss in two Qatari families. We have analyzed the effect of this mutation using a combination of confocal immunofluorescence microscopy and molecular dynamics simulations. At the cellular level, our results show that the mutant protein fails to form junctional channels in HeLa transfectants despite being correctly targeted to the plasma membrane. At the molecular level, this effect can be accounted for by disruption of the disulfide bridge that Cys169 forms with Cys64 in the wild-type structure (Cx26WT). The lack of the disulfide bridge in the Cx26C169Y protein causes a spatial rearrangement of two important residues, Asn176 and Thr177. In the Cx26WT protein, these residues play a crucial role in the intra-molecular interactions that permit the formation of an intercellular channel by the head-to-head docking of two opposing hemichannels resident in the plasma membrane of adjacent cells. Our results elucidate the molecular pathogenesis of hereditary hearing loss due to the connexin mutation and facilitate the understanding of its role in both healthy and affected individuals.

}, keywords = {Alleles, Amino Acid Substitution, Cell Line, Connexins, Female, Gap Junctions, Gene Expression, Genotype, Hearing Loss, Humans, Immunohistochemistry, Male, Models, Molecular, Mutation, Missense, Pedigree, Polymorphism, Genetic, Protein Conformation, Protein Interaction Domains and Motifs, Transfection}, issn = {1460-2083}, doi = {10.1093/hmg/ddv026}, author = {Zonta, Francesco and Girotto, Giorgia and Buratto, Damiano and Crispino, Giulia and Morgan, Anna and Abdulhadi, Khalid and Alkowari, Moza and Badii, Ramin and Gasparini, Paolo and Mammano, Fabio} } @article {7769, title = {Phenotypic and genetic characterization of a family carrying two Xq21.1-21.3 interstitial deletions associated with syndromic hearing loss.}, journal = {Mol Cytogenet}, volume = {8}, year = {2015}, month = {2015}, pages = {18}, abstract = {

BACKGROUND: Sensorineural hearing impairment is a common pathological manifestation in patients affected by X-linked intellectual disability. A few cases of interstitial deletions at Xq21 with several different phenotypic characteristics have been described, but to date, a complete molecular characterization of the deletions harboring disease-causing genes is still missing. Thus, the aim of this study is to realize a detailed clinical and molecular analysis of a family affected by syndromic X-linked hearing loss with intellectual disability.

RESULTS: Clinical analyses revealed a very complex phenotype that included inner ear malformations, vestibular problems, choroideremia and hypotonia with a peculiar pattern of phenotypic variability. Genomic analysis revealed, for the first time, the presence of two close interstitial deletions in the Xq21.1-21.3, harboring 11 protein coding, 9 non-coding genes and 19 pseudogenes. Among these, 3 protein coding genes have already been associated with X-linked hearing loss, intellectual disability and choroideremia.

CONCLUSIONS: In this study we highlighted the presence of peculiar genotypic and phenotypic details in a family affected by syndromic X-linked hearing loss with intellectual disability. We identified two, previously unreported, Xq21.1-21.3 interstitial deletions. The two rearrangements, containing several genes, segregate with the clinical features, suggesting their role in the pathogenicity. However, not all the observed phenotypic features can be clearly associated with the known genes thus, further study is necessary to determine regions involved.

}, issn = {1755-8166}, doi = {10.1186/s13039-015-0120-0}, author = {Iossa, Sandra and Costa, Valerio and Corvino, Virginia and Auletta, Gennaro and Barruffo, Luigi and Cappellani, Stefania and Ceglia, Carlo and Cennamo, Giovanni and d{\textquoteright}Adamo, Adamo Pio and D{\textquoteright}Amico, Alessandra and Di Paolo, Nilde and Forte, Raimondo and Gasparini, Paolo and Laria, Carla and Lombardo, Barbara and Malesci, Rita and Vitale, Andrea and Marciano, Elio and Franz{\`e}, Annamaria} } @article {7738, title = {Polymorphisms in sweet taste genes (TAS1R2 and GLUT2), sweet liking, and dental caries prevalence in an adult Italian population.}, journal = {Genes Nutr}, volume = {10}, year = {2015}, month = {2015 Sep}, pages = {485}, abstract = {

The aim of the study was to assess the relationship between sweet taste genes and dental caries prevalence in a large sample of adults. In addition, the association between sweet liking and sugar intake with dental caries was investigated. Caries was measured by the decayed, missing, filled teeth (DMFT) index in 647 Caucasian subjects (285 males and 362 females, aged 18-65~years), coming from six villages in northeastern Italy. Sweet liking was assessed using a 9-point scale, and the mean of the liking given by each individual to specific sweet food and beverages was used to create a sweet liking score. Simple sugar consumption was estimated by a dietary history interview, considering both added sugars and sugar present naturally in foods. Our study confirmed that polymorphisms in TAS1R2 and GLUT2 genes are related to DMFT index. In particular, GG homozygous individuals for rs3935570 in TAS1R2 gene (p value~=~0.0117) and GG homozygous individuals for rs1499821 in GLUT2 gene (p value~=~0.0273) showed higher DMFT levels compared to both heterozygous and homozygous for the alternative allele. Furthermore, while the relationship sugar intake-DMFT did not achieve statistical significance (p value~=~0.075), a significant association was identified between sweet liking and DMFT (p value~=~0.004), independent of other variables. Our study showed that sweet taste genetic factors contribute to caries prevalence and highlighted the role of sweet liking as a predictor of caries risk. Therefore, these results may open new perspectives for individual risk identification and implementation of target preventive strategies, such as identifying high-risk patients before caries development.

}, issn = {1555-8932}, doi = {10.1007/s12263-015-0485-z}, author = {Robino, Antonietta and Bevilacqua, Lorenzo and Pirastu, Nicola and Situlin, Roberta and Di Lenarda, Roberto and Gasparini, Paolo and Navarra, Chiara Ottavia} } @article {8039, title = {Population genetic differentiation of height and body mass index across Europe.}, journal = {Nat Genet}, volume = {47}, year = {2015}, month = {2015 Nov}, pages = {1357-62}, abstract = {

Across-nation differences in the mean values for complex traits are common, but the reasons for these differences are unknown. Here we find that many independent loci contribute to population genetic differences in height and body mass index (BMI) in 9,416 individuals across 14 European countries. Using discovery data on over 250,000 individuals and unbiased effect size estimates from 17,500 sibling pairs, we estimate that 24\% (95\% credible interval (CI) = 9\%, 41\%) and 8\% (95\% CI = 4\%, 16\%) of the captured additive genetic variance for height and BMI, respectively, reflect population genetic differences. Population genetic divergence differed significantly from that in a null model (height, P < 3.94 {\texttimes} 10(-8); BMI, P < 5.95 {\texttimes} 10(-4)), and we find an among-population genetic correlation for tall and slender individuals (r = -0.80, 95\% CI = -0.95, -0.60), consistent with correlated selection for both phenotypes. Observed differences in height among populations reflected the predicted genetic means (r = 0.51; P < 0.001), but environmental differences across Europe masked genetic differentiation for BMI (P < 0.58).

}, issn = {1546-1718}, doi = {10.1038/ng.3401}, author = {Robinson, Matthew R and Hemani, Gibran and Medina-Gomez, Carolina and Mezzavilla, Massimo and Esko, T{\~o}nu and Shakhbazov, Konstantin and Powell, Joseph E and Vinkhuyzen, Anna and Berndt, Sonja I and Gustafsson, Stefan and Justice, Anne E and Kahali, Bratati and Locke, Adam E and Pers, Tune H and Vedantam, Sailaja and Wood, Andrew R and van Rheenen, Wouter and Andreassen, Ole A and Gasparini, Paolo and Metspalu, Andres and Berg, Leonard H van den and Veldink, Jan H and Rivadeneira, Fernando and Werge, Thomas M and Abecasis, Goncalo R and Boomsma, Dorret I and Chasman, Daniel I and de Geus, Eco J C and Frayling, Timothy M and Hirschhorn, Joel N and Hottenga, Jouke Jan and Ingelsson, Erik and Loos, Ruth J F and Magnusson, Patrik K E and Martin, Nicholas G and Montgomery, Grant W and North, Kari E and Pedersen, Nancy L and Spector, Timothy D and Speliotes, Elizabeth K and Goddard, Michael E and Yang, Jian and Visscher, Peter M} } @article {8094, title = {PSIP1/LEDGF: a new gene likely involved in sensorineural progressive hearing loss.}, journal = {Sci Rep}, volume = {5}, year = {2015}, month = {2015}, pages = {18568}, abstract = {

Hereditary Hearing Loss (HHL) is an extremely heterogeneous disorder. Approximately 30 out of 80 known HHL genes are associated with autosomal dominant forms. Here, we identified PSIP1/LEDGF (isoform p75) as a novel strong candidate gene involved in dominant HHL. Using exome sequencing we found a frameshift deletion (c.1554_1555del leading to p.E518Dfs*2) in an Italian pedigree affected by sensorineural mild-to-moderate HHL but also showing a variable eye phenotype (i.e. uveitis, optic neuropathy). This deletion led to a premature stop codon (p.T519X) with truncation of the last 12 amino acids. PSIP1 was recently described as a transcriptional co-activator regulated by miR-135b in vestibular hair cells of the mouse inner ear as well as a possible protector against photoreceptor degeneration. Here, we demonstrate that it is ubiquitously expressed in the mouse inner ear. The PSIP1 mutation is associated with a peculiar audiometric slope toward the high frequencies. These findings indicate that PSIP1 likely plays an important role in HHL.

}, issn = {2045-2322}, doi = {10.1038/srep18568}, author = {Girotto, Giorgia and Scheffer, Deborah I and Morgan, Anna and Vozzi, Diego and Rubinato, Elisa and Di Stazio, Mariateresa and Muzzi, Enrico and Pensiero, Stefano and Giersch, Anne B and Corey, David P and Gasparini, Paolo} } @article {3593, title = {Parent-of-origin-specific allelic associations among 106 genomic loci for age at menarche.}, journal = {Nature}, volume = {514}, year = {2014}, month = {2014 Oct 2}, pages = {92-7}, abstract = {

Age at menarche is a marker of timing of puberty in females. It varies widely between individuals, is a heritable trait and is associated with risks for obesity, type 2 diabetes, cardiovascular disease, breast cancer and all-cause mortality. Studies of rare human disorders of puberty and animal models point to a complex hypothalamic-pituitary-hormonal regulation, but the mechanisms that determine pubertal timing and underlie its links to disease risk remain unclear. Here, using genome-wide and custom-genotyping arrays in up to 182,416 women of European descent from 57 studies, we found robust evidence (P < 5 {\texttimes} 10(-8)) for 123 signals at 106 genomic loci associated with age at menarche. Many loci were associated with other pubertal traits in both sexes, and there was substantial overlap with genes implicated in body mass index and various diseases, including rare disorders of puberty. Menarche signals were enriched in imprinted regions, with three loci (DLK1-WDR25, MKRN3-MAGEL2 and KCNK9) demonstrating parent-of-origin-specific associations concordant with known parental expression patterns. Pathway analyses implicated nuclear hormone receptors, particularly retinoic acid and γ-aminobutyric acid-B2 receptor signalling, among novel mechanisms that regulate pubertal timing in humans. Our findings suggest a genetic architecture involving at least hundreds of common variants in the coordinated timing of the pubertal transition.

}, keywords = {Adolescent, Age Factors, Alleles, Body Mass Index, Breast Neoplasms, Cardiovascular Diseases, Child, Diabetes Mellitus, Type 2, Europe, Female, Genetic Loci, Genome-Wide Association Study, Genomic Imprinting, Humans, Hypothalamo-Hypophyseal System, Intercellular Signaling Peptides and Proteins, Male, Membrane Proteins, Menarche, Obesity, Ovary, Parents, Polymorphism, Single Nucleotide, Potassium Channels, Tandem Pore Domain, Proteins, Quantitative Trait Loci, Receptors, GABA-B, Receptors, Retinoic Acid, Ribonucleoproteins}, issn = {1476-4687}, doi = {10.1038/nature13545}, author = {Perry, John R B and Day, Felix and Elks, Cathy E and Sulem, Patrick and Thompson, Deborah J and Ferreira, Teresa and He, Chunyan and Chasman, Daniel I and Esko, T{\~o}nu and Thorleifsson, Gudmar and Albrecht, Eva and Ang, Wei Q and Corre, Tanguy and Cousminer, Diana L and Feenstra, Bjarke and Franceschini, Nora and Ganna, Andrea and Johnson, Andrew D and Kjellqvist, Sanela and Lunetta, Kathryn L and McMahon, George and Nolte, Ilja M and Paternoster, Lavinia and Porcu, Eleonora and Smith, Albert V and Stolk, Lisette and Teumer, Alexander and T{\v s}ernikova, Natalia and Tikkanen, Emmi and Ulivi, Sheila and Wagner, Erin K and Amin, Najaf and Bierut, Laura J and Byrne, Enda M and Hottenga, Jouke-Jan and Koller, Daniel L and Mangino, Massimo and Pers, Tune H and Yerges-Armstrong, Laura M and Hua Zhao, Jing and Andrulis, Irene L and Anton-Culver, Hoda and Atsma, Femke and Bandinelli, Stefania and Beckmann, Matthias W and Benitez, Javier and Blomqvist, Carl and Bojesen, Stig E and Bolla, Manjeet K and Bonanni, Bernardo and Brauch, Hiltrud and Brenner, Hermann and Buring, Julie E and Chang-Claude, Jenny and Chanock, Stephen and Chen, Jinhui and Chenevix-Trench, Georgia and Coll{\'e}e, J Margriet and Couch, Fergus J and Couper, David and Coviello, Andrea D and Cox, Angela and Czene, Kamila and d{\textquoteright}Adamo, Adamo Pio and Davey Smith, George and De Vivo, Immaculata and Demerath, Ellen W and Dennis, Joe and Devilee, Peter and Dieffenbach, Aida K and Dunning, Alison M and Eiriksdottir, Gudny and Eriksson, Johan G and Fasching, Peter A and Ferrucci, Luigi and Flesch-Janys, Dieter and Flyger, Henrik and Foroud, Tatiana and Franke, Lude and Garcia, Melissa E and Garc{\'\i}a-Closas, Montserrat and Geller, Frank and de Geus, Eco E J and Giles, Graham G and Gudbjartsson, Daniel F and Gudnason, Vilmundur and Guenel, Pascal and Guo, Suiqun and Hall, Per and Hamann, Ute and Haring, Robin and Hartman, Catharina A and Heath, Andrew C and Hofman, Albert and Hooning, Maartje J and Hopper, John L and Hu, Frank B and Hunter, David J and Karasik, David and Kiel, Douglas P and Knight, Julia A and Kosma, Veli-Matti and Kutalik, Zolt{\'a}n and Lai, Sandra and Lambrechts, Diether and Lindblom, Annika and M{\"a}gi, Reedik and Magnusson, Patrik K and Mannermaa, Arto and Martin, Nicholas G and Masson, Gisli and McArdle, Patrick F and McArdle, Wendy L and Melbye, Mads and Michailidou, Kyriaki and Mihailov, Evelin and Milani, Lili and Milne, Roger L and Nevanlinna, Heli and Neven, Patrick and Nohr, Ellen A and Oldehinkel, Albertine J and Oostra, Ben A and Palotie, Aarno and Peacock, Munro and Pedersen, Nancy L and Peterlongo, Paolo and Peto, Julian and Pharoah, Paul D P and Postma, Dirkje S and Pouta, Anneli and Pylk{\"a}s, Katri and Radice, Paolo and Ring, Susan and Rivadeneira, Fernando and Robino, Antonietta and Rose, Lynda M and Rudolph, Anja and Salomaa, Veikko and Sanna, Serena and Schlessinger, David and Schmidt, Marjanka K and Southey, Mellissa C and Sovio, Ulla and Stampfer, Meir J and St{\"o}ckl, Doris and Storniolo, Anna M and Timpson, Nicholas J and Tyrer, Jonathan and Visser, Jenny A and Vollenweider, Peter and V{\"o}lzke, Henry and Waeber, Gerard and Waldenberger, Melanie and Wallaschofski, Henri and Wang, Qin and Willemsen, Gonneke and Winqvist, Robert and Wolffenbuttel, Bruce H R and Wright, Margaret J and Boomsma, Dorret I and Econs, Michael J and Khaw, Kay-Tee and Loos, Ruth J F and McCarthy, Mark I and Montgomery, Grant W and Rice, John P and Streeten, Elizabeth A and Thorsteinsdottir, Unnur and van Duijn, Cornelia M and Alizadeh, Behrooz Z and Bergmann, Sven and Boerwinkle, Eric and Boyd, Heather A and Crisponi, Laura and Gasparini, Paolo and Gieger, Christian and Harris, Tamara B and Ingelsson, Erik and J{\"a}rvelin, Marjo-Riitta and Kraft, Peter and Lawlor, Debbie and Metspalu, Andres and Pennell, Craig E and Ridker, Paul M and Snieder, Harold and S{\o}rensen, Thorkild I A and Spector, Tim D and Strachan, David P and Uitterlinden, Andr{\'e} G and Wareham, Nicholas J and Widen, Elisabeth and Zygmunt, Marek and Murray, Anna and Easton, Douglas F and Stefansson, Kari and Murabito, Joanne M and Ong, Ken K} } @article {3507, title = {A population-based approach to study the impact of PROP perception on food liking in populations along the Silk Road.}, journal = {PLoS One}, volume = {9}, year = {2014}, month = {2014}, pages = {e91716}, abstract = {

Taste is one of the main factors determining food choices. Differences in PROP bitter taste perception have been implicated in individual differences in food preferences and selection. The present study examined associations between, PROP phenotypes, self-reported food liking and TAS2R38 polymorphisms, the major gene implicated in PROP bitterness, in six different populations of the Caucasus and Central Asia, located along the ancient Silk Road. Differences in the distribution of PROP phenotypes across populations were detected, with a higher frequency of super tasters in Tajikistan (31.3\%) and Armenia (39.0\%) and a higher frequency of non tasters in Georgia (50.9\%). While no relationships were observed between PROP phenotypes and food liking using standard statistical tests, we used an approach based on comparison of distance matrices derived from these data. The first matrix compared the food liking ratings of each population to all others pairwise using the Kruskal-Wallis test (at p<0.00063), and the second one compared the distribution of PROP phenotypes across all populations in a similar manner calculating the chi-square statistic as a distance measure. A strong correlation between the two matrices was found (Mantel test: r = 0.67, p-value = 0.03), suggesting that the pattern of food liking across populations was closely related to the distribution of PROP phenotypes. This same relationship was not observed when TAS2R38 genotypes were substituted for PROP phenotypes in this analysis. Our data suggest that a population-based approach utilizing distance matrices is a useful technique for detecting PROP-related differences in food liking and can be applied to other taste phenotypes.

}, keywords = {Armenia, Azerbaijan, Food, Genetic Association Studies, Genotype, Haplotypes, Humans, Polymorphism, Single Nucleotide, Propylthiouracil, Receptors, G-Protein-Coupled, Tajikistan, Taste, Taste Perception, Uzbekistan}, issn = {1932-6203}, doi = {10.1371/journal.pone.0091716}, author = {Robino, Antonietta and Mezzavilla, Massimo and Pirastu, Nicola and Dognini, Maddalena and Tepper, Beverly J and Gasparini, Paolo} } @article {1733, title = {Phospholipase C-β3 is a key modulator of IL-8 expression in cystic fibrosis bronchial epithelial cells.}, journal = {J Immunol}, volume = {186}, year = {2011}, month = {2011 Apr 15}, pages = {4946-58}, abstract = {

Respiratory insufficiency is the major cause of morbidity and mortality in patients affected by cystic fibrosis (CF). An excessive neutrophilic inflammation, mainly orchestrated by the release of IL-8 from bronchial epithelial cells and amplified by chronic bacterial infection with Pseudomonas aeruginosa, leads to progressive tissue destruction. The anti-inflammatory drugs presently used in CF patients have several limitations, indicating the need for identifying novel molecular targets. To address this issue, we preliminarily studied the association of 721 single nucleotide polymorphisms from 135 genes potentially involved in signal transduction implicated in neutrophil recruitment in a cohort of F508del homozygous CF patients with either severe or mild progression of lung disease. The top ranking association was found for a nonsynonymous polymorphism of the phospholipase C-β3 (PLCB3) gene. Studies in bronchial epithelial cells exposed to P. aeruginosa revealed that PLCB3 is implicated in extracellular nucleotide-dependent intracellular calcium signaling, leading to activation of the protein kinase Cα and Cβ and of the nuclear transcription factor NF-κB p65. The proinflammatory pathway regulated by PLCB3 acts by potentiating the Toll-like Receptors{\textquoteright} signaling cascade and represents an interesting molecular target to attenuate the excessive recruitment of neutrophils without completely abolishing the inflammatory response.

}, keywords = {Adenosine Triphosphate, Calcium, Cell Line, Transformed, Cystic Fibrosis, Enzyme Activation, Epithelial Cells, Gene Expression, Gene Frequency, Genotype, Green Fluorescent Proteins, Host-Pathogen Interactions, Humans, Interleukin-8, Isoenzymes, Lung Diseases, Microscopy, Fluorescence, Phospholipase C beta, Polymorphism, Single Nucleotide, Protein Kinase C, Protein Kinase C beta, Pseudomonas aeruginosa, RNA Interference, Toll-Like Receptors, Transcription Factor RelA}, issn = {1550-6606}, doi = {10.4049/jimmunol.1003535}, author = {Bezzerri, Valentino and d{\textquoteright}Adamo, Pio and Rimessi, Alessandro and Lanzara, Carmen and Crovella, Sergio and Nicolis, Elena and Tamanini, Anna and Athanasakis, Emmanouil and Tebon, Maela and Bisoffi, Giulia and Drumm, Mitchell L and Knowles, Michael R and Pinton, Paolo and Gasparini, Paolo and Berton, Giorgio and Cabrini, Giulio} } @article {1644, title = {A polymorphism in the 5{\textquoteright} UTR of the DEFB1 gene is associated with the lung phenotype in F508del homozygous Italian cystic fibrosis patients.}, journal = {Clin Chem Lab Med}, volume = {49}, year = {2011}, month = {2011 Jan}, pages = {49-54}, abstract = {

BACKGROUND: The identification of cystic fibrosis (CF) patients who are at greater risk of lung damage could be clinically valuable. Thus, we attempted to replicate previous findings and verify the possible association between three single nucleotide polymorphisms (SNPs c.-52G>A, c.-44C>G and c.-20G>A) in the 5{\textquoteright} untranslated region (5{\textquoteright} UTR) of the β defensin 1 (DEFB1) gene and the CF pulmonary phenotype.

METHODS: Genomic DNA from 92 Italian CF patients enrolled in different regional CF centres was extracted from peripheral blood and genotyped for DEFB1 SNPs using TaqMan({\textregistered}) allele specific probes. In order to avoid genetic confounding causes that can account for CF phenotype variability, all patients were homozygous for the F508del CFTR mutation, and were then classified on the basis of clinical and functional data as mild lung phenotype (Mp, n=50) or severe lung phenotype patients (Sp, n=42).

RESULTS: For the c.-20G>A SNP, the frequency of the A allele, as well as the AA genotype, were significantly more frequent in Mp than in Sp patients, and thus this was associated with a protective effect against severe pulmonary disease (OR=0.48 and 0.28, respectively). The effect of the c.-20G>A A allele is consistent with a recessive model, and the protective effect against Sp is exerted only when it is present in homozygosis. For the other two SNPs, no differences were observed as allelic and genotypic frequency in the two subgroups of CF patients.

CONCLUSIONS: Our results, although necessary to be confirmed in larger and multiethnic populations, reinforce DEFB1 as a candidate modifier gene of the CF pulmonary phenotype.

}, keywords = {5{\textquoteright} Untranslated Regions, Adult, beta-Defensins, Cystic Fibrosis, Cystic Fibrosis Transmembrane Conductance Regulator, Female, Genotype, Homozygote, Humans, Italy, Male, Mutation, Phenotype, Polymorphism, Genetic, Young Adult}, issn = {1437-4331}, doi = {10.1515/CCLM.2011.023}, author = {Crovella, Sergio and Segat, Ludovica and Amato, Annalisa and Athanasakis, Emmanouil and Bezzerri, Valentino and Braggion, Cesare and Casciaro, Rosaria and Castaldo, Giuseppe and Colombo, Carla and Covone, Angela Elvira and De Rose, Virginia and Gagliardini, Rolando and Lanzara, Carmen and Minicucci, Laura and Morgutti, Marcello and Nicolis, Elena and Pardo, Francesca and Quattrucci, Serena and Raia, Valeria and Ravazzolo, Roberto and Seia, Manuela and Stanzial, Valentino and Termini, Lisa and Zazzeron, Laura and Cabrini, Giulio and Gasparini, Paolo} }