Genetic variation in the two-pore domain potassium channel, TASK-1, may contribute to an atrial substrate for arrhythmogenesis

Bo Liang, Magdalena Soka, Alex Horby Christensen, Morten S Olesen, Anders P Larsen, Filip K Knop, Fan Wang, Jonas B Nielsen, Martin Andersen, David Humphreys, Stefan A Mann, Inken G Huttner, Jamie I Vandenberg, Jesper H Svendsen, Stig Haunsø, Thomas Preiss, Guiscard Seebohm, Søren Peter Olesen, Nicole Schmitt, Diane Fatkin

    68 Citationer (Scopus)

    Abstract

    The two-pore domain potassium channel, K2P3.1 (TASK-1) modulates background conductance in isolated human atrial cardiomyocytes and has been proposed as a potential drug target for atrial fibrillation (AF). TASK-1 knockout mice have a predominantly ventricular phenotype however, and effects of TASK-1 inactivation on atrial structure and function have yet to be demonstrated in vivo. The extent to which genetic variation in KCNK3, that encodes TASK-1, might be a determinant of susceptibility to AF is also unknown. To address these questions, we first evaluated the effects of transient knockdown of the zebrafish kcnk3a and kcnk3b genes and cardiac phenotypes were evaluated using videomicroscopy. Combined kcnk3a and kcnk3b knockdown in 72 hour post fertilization embryos resulted in lower heart rate (p
    OriginalsprogEngelsk
    TidsskriftJournal of Molecular and Cellular Cardiology
    Vol/bind67
    Sider (fra-til)69-76
    ISSN0022-2828
    DOI
    StatusUdgivet - 2014

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