@article {7809, title = {Exome-chip meta-analysis identifies novel loci associated with cardiac conduction, including ADAMTS6.}, journal = {Genome Biol}, volume = {19}, year = {2018}, month = {2018 07 17}, pages = {87}, abstract = {

BACKGROUND: Genome-wide association studies conducted on QRS duration, an electrocardiographic measurement associated with heart failure and sudden cardiac death, have led to novel biological insights into cardiac function. However, the variants identified fall predominantly in non-coding regions and their underlying mechanisms remain unclear.

RESULTS: Here, we identify putative functional coding variation associated with changes in the QRS interval duration by combining Illumina HumanExome BeadChip genotype data from 77,898 participants of European ancestry and 7695 of African descent in our discovery cohort, followed by replication in 111,874~individuals of European ancestry from the UK Biobank and deCODE cohorts. We identify ten novel loci, seven within coding regions, including ADAMTS6, significantly associated with QRS duration in gene-based analyses. ADAMTS6 encodes a secreted metalloprotease of currently unknown function. In vitro validation analysis shows that the QRS-associated variants lead to impaired ADAMTS6 secretion and loss-of function analysis in mice demonstrates a previously unappreciated role for ADAMTS6 in connexin 43 gap junction expression, which is essential for myocardial conduction.

CONCLUSIONS: Our approach identifies novel coding and non-coding variants underlying ventricular depolarization and provides a possible mechanism for the ADAMTS6-associated conduction changes.

}, issn = {1474-760X}, doi = {10.1186/s13059-018-1457-6}, author = {Prins, Bram P and Mead, Timothy J and Brody, Jennifer A and Sveinbjornsson, Gardar and Ntalla, Ioanna and Bihlmeyer, Nathan A and van den Berg, Marten and Bork-Jensen, Jette and Cappellani, Stefania and Van Duijvenboden, Stefan and Klena, Nikolai T and Gabriel, George C and Liu, Xiaoqin and Gulec, Cagri and Grarup, Niels and Haessler, Jeffrey and Hall, Leanne M and Iorio, Annamaria and Isaacs, Aaron and Li-Gao, Ruifang and Lin, Honghuang and Liu, Ching-Ti and Lyytik{\"a}inen, Leo-Pekka and Marten, Jonathan and Mei, Hao and M{\"u}ller-Nurasyid, Martina and Orini, Michele and Padmanabhan, Sandosh and Radmanesh, Farid and Ramirez, Julia and Robino, Antonietta and Schwartz, Molly and van Setten, Jessica and Smith, Albert V and Verweij, Niek and Warren, Helen R and Weiss, Stefan and Alonso, Alvaro and Arnar, David O and Bots, Michiel L and de Boer, Rudolf A and Dominiczak, Anna F and Eijgelsheim, Mark and Ellinor, Patrick T and Guo, Xiuqing and Felix, Stephan B and Harris, Tamara B and Hayward, Caroline and Heckbert, Susan R and Huang, Paul L and Jukema, J W and K{\"a}h{\"o}nen, Mika and Kors, Jan A and Lambiase, Pier D and Launer, Lenore J and Li, Man and Linneberg, Allan and Nelson, Christopher P and Pedersen, Oluf and Perez, Marco and Peters, Annette and Polasek, Ozren and Psaty, Bruce M and Raitakari, Olli T and Rice, Kenneth M and Rotter, Jerome I and Sinner, Moritz F and Soliman, Elsayed Z and Spector, Tim D and Strauch, Konstantin and Thorsteinsdottir, Unnur and Tinker, Andrew and Trompet, Stella and Uitterlinden, Andre and Vaartjes, Ilonca and van der Meer, Peter and V{\"o}lker, Uwe and V{\"o}lzke, Henry and Waldenberger, Melanie and Wilson, James G and Xie, Zhijun and Asselbergs, Folkert W and D{\"o}rr, Marcus and van Duijn, Cornelia M and Gasparini, Paolo and Gudbjartsson, Daniel F and Gudnason, Vilmundur and Hansen, Torben and K{\"a}{\"a}b, Stefan and Kanters, J{\o}rgen K and Kooperberg, Charles and Lehtim{\"a}ki, Terho and Lin, Henry J and Lubitz, Steven A and Mook-Kanamori, Dennis O and Conti, Francesco J and Newton-Cheh, Christopher H and Rosand, Jonathan and Rudan, Igor and Samani, Nilesh J and Sinagra, Gianfranco and Smith, Blair H and Holm, Hilma and Stricker, Bruno H and Ulivi, Sheila and Sotoodehnia, Nona and Apte, Suneel S and van der Harst, Pim and Stefansson, Kari and Munroe, Patricia B and Arking, Dan E and Lo, Cecilia W and Jamshidi, Yalda} } @article {7784, title = {ExomeChip-Wide Analysis of 95 626 Individuals Identifies 10 Novel Loci Associated With QT and JT Intervals.}, journal = {Circ Genom Precis Med}, volume = {11}, year = {2018}, month = {2018 Jan}, pages = {e001758}, abstract = {

BACKGROUND: QT interval, measured through a standard ECG, captures the time it takes for the cardiac ventricles to depolarize and repolarize. JT interval is the component of the QT interval that reflects ventricular repolarization alone. Prolonged QT interval has been linked to higher risk of sudden cardiac arrest.

METHODS AND RESULTS: We performed an ExomeChip-wide analysis for both QT and JT intervals, including 209 449 variants, both common and rare, in 17 341 genes from the Illumina Infinium HumanExome BeadChip. We identified 10 loci that modulate QT and JT interval duration that have not been previously reported in the literature using single-variant statistical models in a meta-analysis of 95 626 individuals from 23 cohorts (comprised 83 884 European ancestry individuals, 9610 blacks, 1382 Hispanics, and 750 Asians). This brings the total number of ventricular repolarization associated loci to 45. In addition, our approach of using coding variants has highlighted the role of 17 specific genes for involvement in ventricular repolarization, 7 of which are in novel loci.

CONCLUSIONS: Our analyses show a role for myocyte internal structure and interconnections in modulating QT interval duration, adding to previous known roles of potassium, sodium, and calcium ion regulation, as well as autonomic control. We anticipate that these discoveries will open new paths to the goal of making novel remedies for the prevention of lethal ventricular arrhythmias and sudden cardiac arrest.

}, issn = {2574-8300}, doi = {10.1161/CIRCGEN.117.001758}, author = {Bihlmeyer, Nathan A and Brody, Jennifer A and Smith, Albert Vernon and Warren, Helen R and Lin, Honghuang and Isaacs, Aaron and Liu, Ching-Ti and Marten, Jonathan and Radmanesh, Farid and Hall, Leanne M and Grarup, Niels and Mei, Hao and M{\"u}ller-Nurasyid, Martina and Huffman, Jennifer E and Verweij, Niek and Guo, Xiuqing and Yao, Jie and Li-Gao, Ruifang and van den Berg, Marten and Weiss, Stefan and Prins, Bram P and van Setten, Jessica and Haessler, Jeffrey and Lyytik{\"a}inen, Leo-Pekka and Li, Man and Alonso, Alvaro and Soliman, Elsayed Z and Bis, Joshua C and Austin, Tom and Chen, Yii-Der Ida and Psaty, Bruce M and Harrris, Tamara B and Launer, Lenore J and Padmanabhan, Sandosh and Dominiczak, Anna and Huang, Paul L and Xie, Zhijun and Ellinor, Patrick T and Kors, Jan A and Campbell, Archie and Murray, Alison D and Nelson, Christopher P and Tobin, Martin D and Bork-Jensen, Jette and Hansen, Torben and Pedersen, Oluf and Linneberg, Allan and Sinner, Moritz F and Peters, Annette and Waldenberger, Melanie and Meitinger, Thomas and Perz, Siegfried and Kolcic, Ivana and Rudan, Igor and de Boer, Rudolf A and van der Meer, Peter and Lin, Henry J and Taylor, Kent D and de Mutsert, Ren{\'e}e and Trompet, Stella and Jukema, J Wouter and Maan, Arie C and Stricker, Bruno H C and Rivadeneira, Fernando and Uitterlinden, Andre and V{\"o}lker, Uwe and Homuth, Georg and V{\"o}lzke, Henry and Felix, Stephan B and Mangino, Massimo and Spector, Timothy D and Bots, Michiel L and Perez, Marco and Raitakari, Olli T and K{\"a}h{\"o}nen, Mika and Mononen, Nina and Gudnason, Vilmundur and Munroe, Patricia B and Lubitz, Steven A and van Duijn, Cornelia M and Newton-Cheh, Christopher H and Hayward, Caroline and Rosand, Jonathan and Samani, Nilesh J and Kanters, J{\o}rgen K and Wilson, James G and K{\"a}{\"a}b, Stefan and Polasek, Ozren and van der Harst, Pim and Heckbert, Susan R and Rotter, Jerome I and Mook-Kanamori, Dennis O and Eijgelsheim, Mark and D{\"o}rr, Marcus and Jamshidi, Yalda and Asselbergs, Folkert W and Kooperberg, Charles and Lehtim{\"a}ki, Terho and Arking, Dan E and Sotoodehnia, Nona} }