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cc-by (c) Tarifa, Carmen et al., 2023
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/202167

Spatial distribution of calcium sparks determines their ability to induce afterdepolarizations in human atrial myocytes

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Analysis of the spatio-temporal distribution of calcium sparks showed a preferential increase in sparks near the sarcolemma in atrial myocytes from patients with atrial fibrillation (AF), linked to higher ryanodine receptor (RyR2) phosphorylation at s2808 and lower calsequestrin-2 levels. Mathematical modeling, incorporating modulation of RyR2 gating, showed that only the observed combinations of RyR2 phosphorylation and calsequestrin-2 levels can account for the spatio-temporal distribution of sparks in patients with and without AF. Furthermore, we demonstrate that preferential calcium release near the sarcolemma is key to a higher incidence and amplitude of afterdepolarizations in atrial myocytes from patients with AF

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TARIFA, Carmen, et al. Spatial distribution of calcium sparks determines their ability to induce afterdepolarizations in human atrial myocytes. JACC: Basic to Translational Science. 2023. Vol. 8, núm. 1, pàgs. 1-15. ISSN 2452-302X. [consulta: 8 de maig de 2026]. Disponible a: https://hdl.handle.net/2445/202167

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