Key result
Sendai reprogramming successfully generates pluripotent patient-specific iPSC line carrying the KCNH2 variant.
Why the study?
LQT2 is caused by pathogenic variants in KCNH2 affecting the IKr channel, and patient-specific iPSC models are needed to study disease mechanisms.
The successful generation of a patient-specific iPSC line for LQT2 provides a valuable in vitro model for studying disease mechanisms and potential therapies.
iPSC model generated for KCNH2-LQT2; leaves open utility for arrhythmia modeling or drug screening.
Long QT syndrome (LQTS), an inherited cardiac ion channelopathy, is associated with ventricular arrhythmias and risk of sudden death. LQTS sub-type 2 (LQT2) is caused by pathogenic variants in KCNH2 encoding the α-subunit of Kv11.1, thus affecting the rapid component of delayed rectifier K+ current (IKr) channel during the action potential. In this study, non-integrational Sendai reprogramming method was used to generate an induced-pluripotent-stem-cell (iPSC) line carrying the KCNH2 c.2464G>A (p.Val822Met) pathogenic variant from a LQT2 patient. This patient-specific iPSC line NUIGi003-A harbouring the c.2464G>A variant expressed pluripotency markers and demonstrated the differentiation potential to all three germ layers.
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Ge et al. (2020) studied Long QT syndrome type 2 (LQT2) (n=1). Sendai reprogramming method was evaluated on Generation and characterization of iPSC line. A patient-specific iPSC line (NUIGi003-A) carrying the KCNH2 c.2464G>A variant was successfully generated, expressing pluripotency markers and demonstrating differentiation potential to all three germ layers.
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