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PPP1R12C Promotes Atrial Hypocontractility in Atrial Fibrillation
CONCLUSIONS: Patients with AF exhibit increased levels of PPP1R12C protein compared with controls. PPP1R12C overexpression in mice increases PP1c targeting to MLC2a and causes MLC2a dephosphorylation, which reduces atrial contractility and increases AF inducibility. These findings suggest that PP1 regulation of sarcomere function at MLC2a is a key determinant of atrial contractility in AF.PMID:37737016 | DOI:10.1161/CIRCRESAHA.123.322516
Source: Circulation Research - September 22, 2023 Category: Cardiology Authors: Srikanth Perike Francisco J Gonzalez-Gonzalez Issam Abu-Taha Frederick W Damen Laurin M Hanft Ken S Lizama Anahita Aboonabi Andrielle E Capote Yuriana Aguilar-Sanchez Benjamin Levin Zhenbo Han Arvind Sridhar Jacob Grand Jody Martin Joseph G Akar Chad M Wa Source Type: research

Genome-wide Study of Atrial Fibrillation Identifies Seven Risk Loci and Highlights Biological Pathways and Regulatory Elements Involved in Cardiac Development
Atrial fibrillation (AF) is a common cardiac arrhythmia and a major risk factor for stroke, heart failure, and premature death. The pathogenesis of AF remains poorly understood, which contributes to the current lack of highly effective treatments. To understand the genetic variation and biology underlying AF, we undertook a genome-wide association study (GWAS) of 6,337 AF individuals and 61,607 AF-free individuals from Norway, including replication in an additional 30,679 AF individuals and 278,895 AF-free individuals.
Source: The American Journal of Human Genetics - December 28, 2017 Category: Genetics & Stem Cells Authors: Jonas B. Nielsen, Lars G. Fritsche, Wei Zhou, Tanya M. Teslovich, Oddgeir L. Holmen, Stefan Gustafsson, Maiken E. Gabrielsen, Ellen M. Schmidt, Robin Beaumont, Brooke N. Wolford, Maoxuan Lin, Chad M. Brummett, Michael H. Preuss, Lena Refsgaard, Erwin P. B Tags: Article Source Type: research