Key result
lncDACH1 overexpression increases ventricular arrhythmia susceptibility by disrupting dystrophin and Nav1.5 membrane distribution.
Why the study?
The role of lncRNA-DACH1 in regulating Nav1.5 membrane distribution via binding to dystrophin and its involvement in ventricular arrhythmogenesis was unclear.
Does lncDACH1 regulate Nav1.5 membrane distribution and increase ventricular arrhythmia susceptibility in cardiomyocyte models?
Does lncDACH1 regulate Nav1.5 membrane distribution and increase ventricular arrhythmia susceptibility in cardiomyocyte models?
LncDACH1 increases ventricular arrhythmia susceptibility by binding to dystrophin and impairing the membrane trafficking of the Nav1.5 protein.
Answers are grounded in this paper and cite their sources.
lncDACH1 overexpression may promote arrhythmias in models; leaves open its clinical relevance and therapeutic potential pending validation.
Dystrophin is a critical interacting protein of Nav1.5 that determines its membrane anchoring in cardiomyocytes. The study aims to explore whether lncRNA-DACH1(lncDACH1) can regulate the distribution of Nav1.5 by binding to dystrophin and participate in ventricular arrhythmogenesis. LncDACH1 was confirmed to bind to dystrophin. Cardiomyocyte-specific transgenic overexpression of lncDACH1(lncDACH1-TG) reduced the membrane distribution of dystrophin and Nav1.5 in cardiomyocytes. The opposite data were collected from lncDACH1 cardiomyocyte conditional knockout (lncDACH1-CKO) mice. Moreover, increased ventricular arrhythmia susceptibility was observed in lncDACH1-TG mice in vivo and ex vivo . The conservative fragment of lncDACH1 inhibited membrane distribution of dystrophin and Nav1.5 and promoted the inducibility of ventricular arrhythmia. Upregulation of dystrophin in lncDACH1-TG mice rescued the impaired membrane distribution of dystrophin and Nav1.5. The human homologue of lncDACH1 inhibited the membrane distribution of Nav1.5 in human iPS-differentiated cardiomyocytes. Collectively, lncDACH1 regulates Nav1.5 membrane distribution by binding to dystrophin and participates in ventricular arrhythmogenesis.
No takes yet. Share an insight, caveat, or question.
Xue et al. (2024) studied Ventricular arrhythmia susceptibility. lncDACH1 (overexpression and knockout) vs. lncDACH1 conditional knockout / control was evaluated on Membrane distribution of Nav1.5 and dystrophin; ventricular arrhythmia susceptibility. Overexpression of lncDACH1 reduced the membrane distribution of dystrophin and Nav1.5 and increased ventricular arrhythmia susceptibility in mice and human iPS-differentiated cardiomyocytes.
Synapse has enriched 10 related papers. Consider them for comparative context: