Key result
High temperature and LPS exacerbated Brugada syndrome phenotypic changes in hiPSC-CMs harboring an SCN5A variant by inhibiting PKA-signaling and enhancing autophagy.
Why the study?
The mechanisms underlying Brugada syndrome type 1 ECG changes during fever and the roles of autophagy and inflammation remained lacking.
Fever and inflammation (LPS) exacerbate Brugada syndrome phenotypes in cardiomyocytes with an SCN5A variant via PKA-signaling inhibition and enhanced autophagy, respectively.
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May heighten SCD monitoring in febrile SCN5A carriers; hypothesis-generating for autophagy-inflammation pathways in BrS.
Li et al. (2023) studied Brugada syndrome. High temperature (40°C) and Lipopolysaccharides (LPS) vs. 37°C and non-BrS/corrected cell lines was evaluated on Electrophysiological phenotypic changes (Na v 1.5 expression, peak sodium channel current, upstroke velocity, and arrhythmic events). High temperature and LPS exacerbated Brugada syndrome phenotypic changes in hiPSC-CMs harboring an SCN5A variant by inhibiting PKA-signaling and enhancing autophagy.
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