Making time and space for calcium control of neuron activity

J Jędrzejewska-Szmek, DB Dorman… - Current opinion in …, 2023 - Elsevier
Calcium directly controls or indirectly regulates numerous functions that are critical for
neuronal network activity. Intracellular calcium concentration is tightly regulated by …

Multi-scale computational modeling of spatial calcium handling from nanodomain to whole-heart: Overview and perspectives

MA Colman, E Alvarez-Lacalle, B Echebarria… - Frontiers in …, 2022 - frontiersin.org
Regulation of intracellular calcium is a critical component of cardiac electrophysiology and
excitation-contraction coupling. The calcium spark, the fundamental element of the …

Local Control Model of a Human Ventricular Myocyte: An Exploration of Frequency-Dependent Changes and Calcium Sparks

JAE Alvarez, MS Jafri, A Ullah - Biomolecules, 2023 - mdpi.com
Calcium (Ca2+) sparks are the elementary events of excitation–contraction coupling, yet
they are not explicitly represented in human ventricular myocyte models. A stochastic …

Pacing Dynamics Determines the Arrhythmogenic Mechanism of the CPVT2-Causing CASQ2G112+5X Mutation in a Guinea Pig Ventricular Myocyte Computational …

R Paudel, MS Jafri, A Ullah - Genes, 2022 - mdpi.com
Calsequestrin Type 2 (CASQ2) is a high-capacity, low-affinity, Ca2+-binding protein
expressed in the sarcoplasmic reticulum (SR) of the cardiac myocyte. Mutations in CASQ2 …

Analysis of RyR2 distribution in HEK293 cells and mouse cardiac myocytes using 3D MINFLUX microscopy

AH Clowsley, A Meletiou, E Lučinskaitė, I Jansen… - bioRxiv, 2023 - biorxiv.org
The cardiac type 2 ryanodine receptor (RyR2) is a large homotetramer of a∼ 560 kD subunit
and is the molecular pathway through which the majority of Ca2+ enters the cytosol during …

Critical requirements for the initiation of a cardiac arrhythmia in rat ventricle: how many myocytes?

A Ullah, MT Hoang-Trong, WJ Lederer, RL Winslow… - Cells, 2022 - mdpi.com
Cardiovascular disease is the leading cause of death worldwide due in a large part to
arrhythmia. In order to understand how calcium dynamics play a role in arrhythmogenesis …

Modeling Calcium Cycling in the Heart: Progress, Pitfalls, and Challenges

Z Qu, D Yan, Z Song - Biomolecules, 2022 - mdpi.com
Intracellular calcium (Ca) cycling in the heart plays key roles in excitation–contraction
coupling and arrhythmogenesis. In cardiac myocytes, the Ca release channels, ie, the …

Understanding Calmodulin Variants Affecting Calcium-Dependent Inactivation of L-Type Calcium Channels through Whole-Cell Simulation of the Cardiac Ventricular …

MD McCoy, A Ullah, WJ Lederer, MS Jafri - Biomolecules, 2022 - mdpi.com
Mutations in the calcium-sensing protein calmodulin (CaM) have been linked to two cardiac
arrhythmia diseases, Long QT Syndrome 14 (LQT14) and Catecholaminergic Polymorphic …

The Role of Ca2+ Sparks in Force Frequency Relationships in Guinea Pig Ventricular Myocytes

R Paudel, MS Jafri, A Ullah - Biomolecules, 2022 - mdpi.com
Calcium sparks are the elementary Ca2+ release events in excitation-contraction coupling
that underlie the Ca2+ transient. The frequency-dependent contractile force generated by …