Sarcoplasmic reticulum Ca2+, Mg2+, K+, and Cl− concentrations adjust quickly as heart rate changes

C Berti, V Zsolnay, TR Shannon, M Fill… - Journal of molecular and …, 2017 - Elsevier
… To better understand the heart rate dependence of SR ion … To simulate leak, we performed
calculations with 1 of the ~50 … that underlies and supports the Ca 2+ release cycle. …

Changes in cellular Ca2+ and Na+ regulation during the progression towards heart failure

KT MacLeod - The Journal of Physiology, 2023 - Wiley Online Library
Ca 2+ from the sarcoplasmic reticulum (SR) via the SR Ca 2+ -… an increase in Na + leak
into the cells or a reduction in Na + /… Therefore, although their underlying mechanism of action …

Increased sarcoplasmic/endoplasmic reticulum calcium ATPase 2a activity underlies the mechanism of the positive inotropic effect of ivabradine

M Xie, HL Huang, WH Zhang, L Gao… - Experimental …, 2020 - Wiley Online Library
… of the Na + /Ca 2+ exchanger and the sarcolemmal Ca 2+ -… increased sarcoplasmic reticulum
Ca 2+ content and reduced … + leak and enhances SR Ca 2+ content, which is consistent …

Mechanisms of calcium leak from cardiac sarcoplasmic reticulum revealed by statistical mechanics

AV Maltsev, MD Stern, VA Maltsev - Biophysical Journal, 2019 - cell.com
… describe the collective behavior of RyRs underlying leak emergence. Regulation of cardiac
… (D) Simulations illustrating disorder leak as λ increases by 10- and 100-fold from its normal (…

Early effects of Epac depend on the fine-tuning of the sarcoplasmic reticulum Ca2+ handling in cardiomyocytes

N Lezcano, JIE Mariángelo, L Vittone… - Journal of molecular and …, 2018 - Elsevier
… is known to increase SR Ca 2 + uptake and leak respectively. In … that an increase in SR
Ca 2 + uptake was underlying the … increased CaMKII autophosphorylation and enhanced

Effect of flecainide derivatives on sarcoplasmic reticulum calcium release suggests a lack of direct action on the cardiac ryanodine receptor

ML Bannister, A Alvarez‐Laviada… - British Journal of …, 2016 - Wiley Online Library
underlying the interaction of flecainide with RyR2 channels. … in Po and increase in Pb (B)
Expanded frequency amplitude … no reduction in SR Ca 2 + leak when I Na was eliminated by …

Luminal Ca2+ regulation of RyR1 Ca2+ channel leak activation and inactivation in sarcoplasmic reticulum membrane vesicles

C Palahniuk, M Mutawe… - Canadian Journal of …, 2021 - cdnsciencepub.com
Ca 2+ exchange across SR membranes is a key determinant of … Ca + signals undergo
fluorescence enhancement by CASQ1, we … Ca 2+ leak abatement occurred at progressively higher

Obstruction of ventricular Ca2+‐dependent arrhythmogenicity by inositol 1,4,5‐trisphosphate‐triggered sarcoplasmic reticulum Ca2+ release

J Blanch i Salvador, M Egger - The Journal of physiology, 2018 - Wiley Online Library
… -Ca 2+ leak via “eventless” SR-Ca 2+ release. The underlying mechanism actively stabilizes
the SR-Ca 2+ … Thus, under conditions of enhanced IP 3 ICR, we hypothesized a secondary …

Intracellular calcium leak in heart failure and atrial fibrillation: a unifying mechanism and therapeutic target

H Dridi, A Kushnir, R Zalk, Q Yuan, Z Melville… - Nature Reviews …, 2020 - nature.com
… cause RYR2 Ca 2+ leak from the sarcoplasmic reticulum during … is a shared mechanism
underlying both HF and AF. … 52,53 and β-blockers improved the binding of calstabin 2 to RYR2 …

Ageing‐associated increase in SGLT2 disrupts mitochondrial/sarcoplasmic reticulum Ca2+ homeostasis and promotes cardiac dysfunction

Y Olgar, E Tuncay, S Degirmenci… - Journal of cellular …, 2020 - Wiley Online Library
improved haemodynamics, more efficient metabolic function … The underlying mechanism
for ageing-associated increased … However, it may have resulted via an electron-transport leak