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Your search keyword '"Dalageorgou, Chrysoula"' showing total 3 results
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3 results on '"Dalageorgou, Chrysoula"'

1. Genetic studies of Long QT syndrome

Author

Dalageorgou, Chrysoula

Subjects
616.128
Abstract

The QT interval is a representation of the cardiac ventricular repolarization process on the electrocardiogram. QT interval varies as a function of age, sex, heart rate, genetic variation and cardiac and non-cardiac drugs. Some individuals may have "normal" QT intervals, but are more susceptible to cardiac arrhythmias, potentially caused by genetic factors underlying QT variability in the general population. A twin study was conducted in which the genetic and environmental influences on QT and corrected QT interval were compared, based on different adjustment formulae. The current report provided evidence that corrected QT interval heritability estimates depend on the specific correction formula applied, as well as that approximately a quarter of the uncorrected QT interval heritability is due to genes specific to QT interval, while the remainder is shared with genes for heart rate. This thesis also aimed to show the penetrance of mutations occurring in the KCNQ1, KCNH2, SCN5A, KCNE1 and KCNE2 cardiac ion channel genes in clinically '. , diagnosed Long QT Syndrome (LQTS) cases. This study showed that the overall detection rate for mutations in the five defined LQTS genes was approximately 31%. Interestingly, a KCNH2 protein linked C terminal mutation was found to produce a prematurely truncated KCNH2 channel and protein defective trafficking using functional analysis. Page 3 •

Published
2012

2. Diagnostic yield of molecular autopsy in patients with sudden arrhythmic death syndrome using targeted exome sequencing

Author

Nunn, Laurence M, Lopes, Luis R, Syrris, Petros, Murphy, Cian, Plagnol, Vincent, Firman, Eileen, Dalageorgou, Chrysoula, Zorio, Esther, Domingo, Diana, Murday, Victoria, Findlay, Iain, Duncan, Alexis, Carr-White, Gerry, Robert, Leema, Bueser, Teofila, Langman, Caroline, Fynn, Simon P, Goddard, Martin, White, Anne, Bundgård, Henning, Ferrero-Miliani, Laura, Wheeldon, Nigel, Suvarna, Simon K, O'Beirne, Aliceson, Lowe, Martin D, McKenna, William J, Elliott, Perry M, Lambiase, Pier D, Nunn, Laurence M, Lopes, Luis R, Syrris, Petros, Murphy, Cian, Plagnol, Vincent, Firman, Eileen, Dalageorgou, Chrysoula, Zorio, Esther, Domingo, Diana, Murday, Victoria, Findlay, Iain, Duncan, Alexis, Carr-White, Gerry, Robert, Leema, Bueser, Teofila, Langman, Caroline, Fynn, Simon P, Goddard, Martin, White, Anne, Bundgård, Henning, Ferrero-Miliani, Laura, Wheeldon, Nigel, Suvarna, Simon K, O'Beirne, Aliceson, Lowe, Martin D, McKenna, William J, Elliott, Perry M, and Lambiase, Pier D

Abstract

AIMS: The targeted genetic screening of Sudden Arrhythmic Death Syndrome (SADS) probands in a molecular autopsy has a diagnostic yield of up to 35%. Exome sequencing has the potential to improve this yield. The primary aim of this study is to examine the feasibility and diagnostic utility of targeted exome screening in SADS victims, utilizing familial clinical screening whenever possible.METHODS AND RESULTS: To determine the feasibility and diagnostic yield of targeted exome sequencing deoxyribonucleic acid (DNA) was isolated from 59 SADS victims (mean age 25 years, range 1-51 years). Targeted exome sequencing of 135 genes associated with cardiomyopathies and ion channelopathies was performed on the Illumina HiSeq2000 platform. Non-synonymous, loss-of-function, and splice-site variants with a minor allele frequency <0.02% in the NHLBI exome sequencing project and an internal set of control exomes were prioritized for analysis followed by <0.5% frequency threshold secondary analysis. First-degree relatives were offered clinical screening for inherited cardiac conditions. Seven probands (12%) carried very rare (<0.02%) or novel non-sense candidate mutations and 10 probands (17%) had previously published rare (0.02-0.5%) candidate mutations-a total yield of 29%. Co-segregation fully confirmed two private SCN5A Na channel mutations. Variants of unknown significance were detected in a further 34% of probands.CONCLUSION: Molecular autopsy using targeted exome sequencing has a relatively low diagnostic yield of very rare potentially disease causing mutations. Candidate pathogenic variants with a higher frequency in control populations are relatively common and should be interpreted with caution.

Published
2016

3. Genetic association study of QT interval highlights role for calcium signaling pathways in myocardial repolarization.

Author

Arking, Dan E, Pulit, Sara L, Crotti, Lia, van der Harst, Pim, Munroe, Patricia B, Koopmann, Tamara T, Sotoodehnia, Nona, Rossin, Elizabeth J, Morley, Michael, Wang, Xinchen, Johnson, Andrew D, Lundby, Alicia, Gudbjartsson, Daníel F, Noseworthy, Peter A, Eijgelsheim, Mark, Bradford, Yuki, Tarasov, Kirill V, Dörr, Marcus, Müller-Nurasyid, Martina, Lahtinen, Annukka M, Nolte, Ilja M, Smith, Albert Vernon, Bis, Joshua C, Isaacs, Aaron, Newhouse, Stephen J, Evans, Daniel S, Post, Wendy S, Waggott, Daryl, Lyytikäinen, Leo-Pekka, Hicks, Andrew A, Eisele, Lewin, Ellinghaus, David, Hayward, Caroline, Navarro, Pau, Ulivi, Sheila, Tanaka, Toshiko, Tester, David J, Chatel, Stéphanie, Gustafsson, Stefan, Kumari, Meena, Morris, Richard W, Naluai, Asa T, Padmanabhan, Sandosh, Kluttig, Alexander, Strohmer, Bernhard, Panayiotou, Andrie G, Torres, Maria, Knoflach, Michael, Hubacek, Jaroslav A, Slowikowski, Kamil, Raychaudhuri, Soumya, Kumar, Runjun D, Harris, Tamara B, Launer, Lenore J, Shuldiner, Alan R, Alonso, Alvaro, Bader, Joel S, Ehret, Georg, Huang, Hailiang, Kao, W H Linda, Strait, James B, Macfarlane, Peter W, Brown, Morris, Caulfield, Mark J, Samani, Nilesh J, Kronenberg, Florian, Willeit, Johann, Smith, J Gustav, Greiser, Karin H, Meyer Zu Schwabedissen, Henriette, Werdan, Karl, Carella, Massimo, Zelante, Leopoldo, Heckbert, Susan R, Psaty, Bruce M, Rotter, Jerome I, Kolcic, Ivana, Polašek, Ozren, Wright, Alan F, Griffin, Maura, Daly, Mark J, Arnar, David O, Hólm, Hilma, Thorsteinsdottir, Unnur, Denny, Joshua C, Roden, Dan M, Zuvich, Rebecca L, Emilsson, Valur, Plump, Andrew S, Larson, Martin G, O'Donnell, Christopher J, Yin, Xiaoyan, Bobbo, Marco, D'Adamo, Adamo P, Iorio, Annamaria, Sinagra, Gianfranco, Carracedo, Angel, Cummings, Steven R, Nalls, Michael A, Jula, Antti, Kontula, Kimmo K, Marjamaa, Annukka, Oikarinen, Lasse, Perola, Markus, Porthan, Kimmo, Erbel, Raimund, Hoffmann, Per, Jöckel, Karl-Heinz, Kälsch, Hagen, Nöthen, Markus M, den Hoed, Marcel, Loos, Ruth J F, Thelle, Dag S, Gieger, Christian, Meitinger, Thomas, Perz, Siegfried, Peters, Annette, Prucha, Hanna, Sinner, Moritz F, Waldenberger, Melanie, de Boer, Rudolf A, Franke, Lude, van der Vleuten, Pieter A, Beckmann, Britt Maria, Martens, Eimo, Bardai, Abdennasser, Hofman, Nynke, Wilde, Arthur A M, Behr, Elijah R, Dalageorgou, Chrysoula, Giudicessi, John R, Medeiros-Domingo, Argelia, Barc, Julien, Kyndt, Florence, Probst, Vincent, Ghidoni, Alice, Insolia, Roberto, Hamilton, Robert M, Scherer, Stephen W, Brandimarto, Jeffrey, Margulies, Kenneth, Moravec, Christine E, Greco M, Fabiola Del, Fuchsberger, Christian, O'Connell, Jeffrey R, Lee, Wai K, Watt, Graham C M, Campbell, Harry, Wild, Sarah H, El Mokhtari, Nour E, Frey, Norbert, Asselbergs, Folkert W, Mateo Leach, Irene, Navis, Gerjan, van den Berg, Maarten P, van Veldhuisen, Dirk J, Kellis, Manolis, Krijthe, Bouwe P, Franco, Oscar H, Hofman, Albert, Kors, Jan A, Uitterlinden, André G, Witteman, Jacqueline C M, Kedenko, Lyudmyla, Lamina, Claudia, Oostra, Ben A, Abecasis, Gonçalo R, Lakatta, Edward G, Mulas, Antonella, Orrú, Marco, Schlessinger, David, Uda, Manuela, Markus, Marcello R P, Völker, Uwe, Snieder, Harold, Spector, Timothy D, Ärnlöv, Johan, Lind, Lars, Sundström, Johan, Syvänen, Ann-Christine, Kivimaki, Mika, Kähönen, Mika, Mononen, Nina, Raitakari, Olli T, Viikari, Jorma S, Adamkova, Vera, Kiechl, Stefan, Brion, Maria, Nicolaides, Andrew N, Paulweber, Bernhard, Haerting, Johannes, Dominiczak, Anna F, Nyberg, Fredrik, Whincup, Peter H, Hingorani, Aroon D, Schott, Jean-Jacques, Bezzina, Connie R, Ingelsson, Erik, Ferrucci, Luigi, Gasparini, Paolo, Wilson, James F, Rudan, Igor, Franke, Andre, Mühleisen, Thomas W, Pramstaller, Peter P, Lehtimäki, Terho J, Paterson, Andrew D, Parsa, Afshin, Liu, Yongmei, van Duijn, Cornelia M, Siscovick, David S, Gudnason, Vilmundur, Jamshidi, Yalda, Salomaa, Veikko, Felix, Stephan B, Sanna, Serena, Ritchie, Marylyn D, Stricker, Bruno H, Stefansson, Kari, Boyer, Laurie A, Cappola, Thomas P, Olsen, Jesper V, Lage, Kasper, Schwartz, Peter J, Kääb, Stefan, Chakravarti, Aravinda, Ackerman, Michael J, Pfeufer, Arne, de Bakker, Paul I W, Newton-Cheh, Christopher, Arking, Dan E, Pulit, Sara L, Crotti, Lia, van der Harst, Pim, Munroe, Patricia B, Koopmann, Tamara T, Sotoodehnia, Nona, Rossin, Elizabeth J, Morley, Michael, Wang, Xinchen, Johnson, Andrew D, Lundby, Alicia, Gudbjartsson, Daníel F, Noseworthy, Peter A, Eijgelsheim, Mark, Bradford, Yuki, Tarasov, Kirill V, Dörr, Marcus, Müller-Nurasyid, Martina, Lahtinen, Annukka M, Nolte, Ilja M, Smith, Albert Vernon, Bis, Joshua C, Isaacs, Aaron, Newhouse, Stephen J, Evans, Daniel S, Post, Wendy S, Waggott, Daryl, Lyytikäinen, Leo-Pekka, Hicks, Andrew A, Eisele, Lewin, Ellinghaus, David, Hayward, Caroline, Navarro, Pau, Ulivi, Sheila, Tanaka, Toshiko, Tester, David J, Chatel, Stéphanie, Gustafsson, Stefan, Kumari, Meena, Morris, Richard W, Naluai, Asa T, Padmanabhan, Sandosh, Kluttig, Alexander, Strohmer, Bernhard, Panayiotou, Andrie G, Torres, Maria, Knoflach, Michael, Hubacek, Jaroslav A, Slowikowski, Kamil, Raychaudhuri, Soumya, Kumar, Runjun D, Harris, Tamara B, Launer, Lenore J, Shuldiner, Alan R, Alonso, Alvaro, Bader, Joel S, Ehret, Georg, Huang, Hailiang, Kao, W H Linda, Strait, James B, Macfarlane, Peter W, Brown, Morris, Caulfield, Mark J, Samani, Nilesh J, Kronenberg, Florian, Willeit, Johann, Smith, J Gustav, Greiser, Karin H, Meyer Zu Schwabedissen, Henriette, Werdan, Karl, Carella, Massimo, Zelante, Leopoldo, Heckbert, Susan R, Psaty, Bruce M, Rotter, Jerome I, Kolcic, Ivana, Polašek, Ozren, Wright, Alan F, Griffin, Maura, Daly, Mark J, Arnar, David O, Hólm, Hilma, Thorsteinsdottir, Unnur, Denny, Joshua C, Roden, Dan M, Zuvich, Rebecca L, Emilsson, Valur, Plump, Andrew S, Larson, Martin G, O'Donnell, Christopher J, Yin, Xiaoyan, Bobbo, Marco, D'Adamo, Adamo P, Iorio, Annamaria, Sinagra, Gianfranco, Carracedo, Angel, Cummings, Steven R, Nalls, Michael A, Jula, Antti, Kontula, Kimmo K, Marjamaa, Annukka, Oikarinen, Lasse, Perola, Markus, Porthan, Kimmo, Erbel, Raimund, Hoffmann, Per, Jöckel, Karl-Heinz, Kälsch, Hagen, Nöthen, Markus M, den Hoed, Marcel, Loos, Ruth J F, Thelle, Dag S, Gieger, Christian, Meitinger, Thomas, Perz, Siegfried, Peters, Annette, Prucha, Hanna, Sinner, Moritz F, Waldenberger, Melanie, de Boer, Rudolf A, Franke, Lude, van der Vleuten, Pieter A, Beckmann, Britt Maria, Martens, Eimo, Bardai, Abdennasser, Hofman, Nynke, Wilde, Arthur A M, Behr, Elijah R, Dalageorgou, Chrysoula, Giudicessi, John R, Medeiros-Domingo, Argelia, Barc, Julien, Kyndt, Florence, Probst, Vincent, Ghidoni, Alice, Insolia, Roberto, Hamilton, Robert M, Scherer, Stephen W, Brandimarto, Jeffrey, Margulies, Kenneth, Moravec, Christine E, Greco M, Fabiola Del, Fuchsberger, Christian, O'Connell, Jeffrey R, Lee, Wai K, Watt, Graham C M, Campbell, Harry, Wild, Sarah H, El Mokhtari, Nour E, Frey, Norbert, Asselbergs, Folkert W, Mateo Leach, Irene, Navis, Gerjan, van den Berg, Maarten P, van Veldhuisen, Dirk J, Kellis, Manolis, Krijthe, Bouwe P, Franco, Oscar H, Hofman, Albert, Kors, Jan A, Uitterlinden, André G, Witteman, Jacqueline C M, Kedenko, Lyudmyla, Lamina, Claudia, Oostra, Ben A, Abecasis, Gonçalo R, Lakatta, Edward G, Mulas, Antonella, Orrú, Marco, Schlessinger, David, Uda, Manuela, Markus, Marcello R P, Völker, Uwe, Snieder, Harold, Spector, Timothy D, Ärnlöv, Johan, Lind, Lars, Sundström, Johan, Syvänen, Ann-Christine, Kivimaki, Mika, Kähönen, Mika, Mononen, Nina, Raitakari, Olli T, Viikari, Jorma S, Adamkova, Vera, Kiechl, Stefan, Brion, Maria, Nicolaides, Andrew N, Paulweber, Bernhard, Haerting, Johannes, Dominiczak, Anna F, Nyberg, Fredrik, Whincup, Peter H, Hingorani, Aroon D, Schott, Jean-Jacques, Bezzina, Connie R, Ingelsson, Erik, Ferrucci, Luigi, Gasparini, Paolo, Wilson, James F, Rudan, Igor, Franke, Andre, Mühleisen, Thomas W, Pramstaller, Peter P, Lehtimäki, Terho J, Paterson, Andrew D, Parsa, Afshin, Liu, Yongmei, van Duijn, Cornelia M, Siscovick, David S, Gudnason, Vilmundur, Jamshidi, Yalda, Salomaa, Veikko, Felix, Stephan B, Sanna, Serena, Ritchie, Marylyn D, Stricker, Bruno H, Stefansson, Kari, Boyer, Laurie A, Cappola, Thomas P, Olsen, Jesper V, Lage, Kasper, Schwartz, Peter J, Kääb, Stefan, Chakravarti, Aravinda, Ackerman, Michael J, Pfeufer, Arne, de Bakker, Paul I W, and Newton-Cheh, Christopher

Abstract

The QT interval, an electrocardiographic measure reflecting myocardial repolarization, is a heritable trait. QT prolongation is a risk factor for ventricular arrhythmias and sudden cardiac death (SCD) and could indicate the presence of the potentially lethal mendelian long-QT syndrome (LQTS). Using a genome-wide association and replication study in up to 100,000 individuals, we identified 35 common variant loci associated with QT interval that collectively explain ∼8-10% of QT-interval variation and highlight the importance of calcium regulation in myocardial repolarization. Rare variant analysis of 6 new QT interval-associated loci in 298 unrelated probands with LQTS identified coding variants not found in controls but of uncertain causality and therefore requiring validation. Several newly identified loci encode proteins that physically interact with other recognized repolarization proteins. Our integration of common variant association, expression and orthogonal protein-protein interaction screens provides new insights into cardiac electrophysiology and identifies new candidate genes for ventricular arrhythmias, LQTS and SCD.

Published
2014
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