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- W2736049462 abstract "Plakophilin-2 (PKP2) is a component of the desmosome and known for its role in cell–cell adhesion. Mutations in human PKP2 associate with a life-threatening arrhythmogenic cardiomyopathy, often of right ventricular predominance. Here, we use a range of state-of-the-art methods and a cardiomyocyte-specific, tamoxifen-activated, PKP2 knockout mouse to demonstrate that in addition to its role in cell adhesion, PKP2 is necessary to maintain transcription of genes that control intracellular calcium cycling. Lack of PKP2 reduces expression of Ryr2 (coding for Ryanodine Receptor 2), Ank2 (coding for Ankyrin-B), Cacna1c (coding for CaV1.2) and Trdn (coding for triadin), and protein levels of calsequestrin-2 (Casq2). These factors combined lead to disruption of intracellular calcium homeostasis and isoproterenol-induced arrhythmias that are prevented by flecainide treatment. We propose a previously unrecognized arrhythmogenic mechanism related to PKP2 expression and suggest that mutations in PKP2 in humans may cause life-threatening arrhythmias even in the absence of structural disease. It is believed that mutations in desmosomal adhesion complex protein plakophilin 2 (PKP2) cause arrhythmia due to loss of cell-cell communication. Here the authors show that PKP2 controls the expression of proteins involved in calcium cycling in adult mouse hearts, and that lack of PKP2 can cause arrhythmia in a structurally normal heart." @default.
- W2736049462 created "2017-07-21" @default.
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- W2736049462 date "2017-07-24" @default.
- W2736049462 modified "2023-10-18" @default.
- W2736049462 title "Plakophilin-2 is required for transcription of genes that control calcium cycling and cardiac rhythm" @default.
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- W2736049462 doi "https://doi.org/10.1038/s41467-017-00127-0" @default.
- W2736049462 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5524637" @default.
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- W2736049462 hasPublicationYear "2017" @default.
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