Multi-scale computational modeling of spatial calcium handling from nanodomain to whole-heart: overview and perspectives
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hdl:2117/366292
Tipus de documentArticle
Data publicació2022-03-09
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteDESARROLLO DE MODELOS AURICULARES A NIVEL DE TEJIDO, CELULAR Y SUBCELULAR, PARA ESTUDIAR MECANISMOS QUE CONFIEREN UN ALTO RIESGO DE PADECER FIBRILACION AURICULAR (AEI-SAF2017-88019-C3-2-R)
ANALISIS COMPUTACIONAL DEL IMPACTO DE RIESGOS GENETICOS Y CLINICOS EN LA SEÑALIZACION MOLECULAR Y DISFUNCIONES ELECTROFISIOLOGICAS EN FIBRILACION AURICULAR (AEI-PID2020-116927RB-C22)
ANALISIS COMPUTACIONAL DEL IMPACTO DE RIESGOS GENETICOS Y CLINICOS EN LA SEÑALIZACION MOLECULAR Y DISFUNCIONES ELECTROFISIOLOGICAS EN FIBRILACION AURICULAR (AEI-PID2020-116927RB-C22)
Abstract
Regulation of intracellular calcium is a critical component of cardiac electrophysiology and excitation-contraction coupling. The calcium spark, the fundamental element of the intracellular calcium transient, is initiated in specialized nanodomains which co-locate the ryanodine receptors and L-type calcium channels. However, calcium homeostasis is ultimately regulated at the cellular scale, by the interaction of spatially separated but diffusively coupled nanodomains with other sub-cellular and surface-membrane calcium transport channels with strong non-linear interactions; and cardiac electrophysiology and arrhythmia mechanisms are ultimately tissue-scale phenomena, regulated by the interaction of a heterogeneous population of coupled myocytes. Recent advances in imaging modalities and image-analysis are enabling the super-resolution reconstruction of the structures responsible for regulating calcium homeostasis, including the internal structure of nanodomains themselves. Extrapolating functional and imaging data from the nanodomain to the whole-heart is non-trivial, yet essential for translational insight into disease mechanisms. Computational modeling has important roles to play in relating structural and functional data at the sub-cellular scale and translating data across the scales. This review covers recent methodological advances that enable image-based modeling of the single nanodomain and whole cardiomyocyte, as well as the development of multi-scale simulation approaches to integrate data from nanometer to whole-heart. Firstly, methods to overcome the computational challenges of simulating spatial calcium dynamics in the nanodomain are discussed, including image-based modeling at this scale. Then, recent whole-cell models, capable of capturing a range of different structures (such as the T-system and mitochondria) and cellular heterogeneity/variability are discussed at two different levels of discretization. Novel methods to integrate the models and data across the scales and simulate stochastic dynamics in tissue-scale models are then discussed, enabling elucidation of the mechanisms by which nanodomain remodeling underlies arrhythmia and contractile dysfunction. Perspectives on model differences and future directions are provided throughout.
CitacióColman, M. [et al.]. Multi-scale computational modeling of spatial calcium handling from nanodomain to whole-heart: overview and perspectives. "Frontiers in Physiology", 9 Març 2022, vol. 13, article 836622
ISSN1664-042X
Versió de l'editorhttps://www.frontiersin.org/articles/10.3389/fphys.2022.836622/full
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