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Perspectives on Neuroscience
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Long QT Syndrome: Genetics and Future Perspective.

Eimear Wallace1, Linda Howard1, Min Liu1

  • 1Regenerative Medicine Institute, School of Medicine, National University of Ireland (NUI) Galway, Galway, Ireland.

Pediatric Cardiology
|August 24, 2019
PubMed
Summary

Long QT syndrome (LQTS) is a genetic heart condition causing dangerous arrhythmias. New gene-editing tools like CRISPR/Cas9 offer potential therapies by correcting the underlying genetic defects.

Keywords:
ArrhythmiasCRISPR–Cas systemsCardiacGene editingInduced pluripotent stem cellsLong QT syndrome

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Area of Science:

  • Cardiovascular Genetics
  • Molecular Cardiology
  • Genetic Medicine

Background:

  • Long QT syndrome (LQTS) is an inherited arrhythmia syndrome linked to cardiac ion channelopathies.
  • It causes delayed cardiomyocyte repolarization, leading to potentially fatal ventricular arrhythmias like torsade de pointes.
  • Current therapies may not fully protect all LQTS patients from arrhythmias.

Purpose of the Study:

  • To explore novel therapeutic strategies for Long QT syndrome.
  • To investigate the potential of RNA interference and CRISPR/Cas9 gene editing for LQTS treatment.
  • To highlight the utility of patient-specific induced pluripotent stem cell-derived cardiomyocytes in modeling LQTS.

Main Methods:

  • Utilizing patient-specific induced pluripotent stem cell-derived cardiomyocytes to model LQTS.
  • Investigating RNA interference to silence or suppress mutant gene expression.
  • Evaluating CRISPR/Cas9 genome editing as a potential therapeutic strategy for monogenic LQTS.

Main Results:

  • Patient-specific iPSC-derived cardiomyocytes enable in vitro modeling of LQTS phenotypes.
  • RNA interference shows potential for knocking out mutant mRNAs responsible for defective proteins.
  • CRISPR/Cas9 presents a promising avenue for gene function elucidation and potential therapeutic rescue of LQTS.

Conclusions:

  • Novel gene-editing technologies offer promising therapeutic avenues for Long QT syndrome.
  • In vitro cardiomyocyte models are valuable for drug screening and gene therapy exploration.
  • Further research is essential to establish the safety and efficacy of CRISPR/Cas9 for LQTS treatment.