Stochasticity intrinsic to coupled-clock mechanisms underlies beat-to-beat variability of spontaneous action potential firing in sinoatrial node pacemaker cells

Y Yaniv, AE Lyashkov, S Sirenko, Y Okamoto… - Journal of molecular and …, 2014 - Elsevier
Recent evidence indicates that the spontaneous action potential (AP) of isolated sinoatrial
node cells (SANCs) is regulated by a system of stochastic mechanisms embodied within two …

[HTML][HTML] cAMP-dependent signaling restores AP firing in dormant SA node cells via enhancement of surface membrane currents and calcium coupling

K Tsutsui, MC Florio, A Yang, AN Wirth, D Yang… - Frontiers in …, 2021 - frontiersin.org
Action potential (AP) firing rate and rhythm of sinoatrial nodal cells (SANC) are controlled by
synergy between intracellular rhythmic local Ca2+ releases (LCRs)(“Ca2+ clock”) and …

[HTML][HTML] Ca2+ and Membrane Potential Transitions During Action Potentials Are Self-Similar to Each Other and to Variability of AP Firing Intervals Across the Broad …

D Yang, CH Morrell, AE Lyashkov… - Frontiers in …, 2021 - frontiersin.org
Ca2+ and V m transitions occurring throughout action potential (AP) cycles in sinoatrial
nodal (SAN) cells are cues that (1) not only regulate activation states of molecules operating …

[HTML][HTML] Age-dependent contribution of intrinsic mechanisms to sinoatrial node function in humans

I Weiser-Bitoun, H Mori, T Nabeshima, N Tanaka… - Scientific Reports, 2023 - nature.com
Average beat interval (BI) and beat interval variability (BIV) are primarily determined by
mutual entrainment between the autonomic-nervous system (ANS) and intrinsic …

Electrochemical Na+ and Ca2+ gradients drive coupled-clock regulation of automaticity of isolated rabbit sinoatrial nodal pacemaker cells

SG Sirenko, VA Maltsev, Y Yaniv… - American Journal …, 2016 - journals.physiology.org
Coupling of an intracellular Ca2+ clock to surface membrane ion channels, ie, a “membrane
clock,” via coupling of electrochemical Na+ and Ca2+ gradients (E Na and E Ca …

[HTML][HTML] Impact of chronic fetal hypoxia and inflammation on cardiac pacemaker cell development

MG Frasch, DA Giussani - Cells, 2020 - mdpi.com
Chronic fetal hypoxia and infection are examples of adverse conditions during complicated
pregnancy, which impact cardiac myogenesis and increase the lifetime risk of heart disease …

Muscle metaboreflex activation during hypercapnia modifies nonlinear heart rhythm dynamics, increasing the complexity of the sinus node autonomic regulation in …

S Delliaux, M Ichinose, K Watanabe, N Fujii… - … -European Journal of …, 2023 - Springer
Muscle metaboreflex activation during hypercapnia leads to enhanced pressive effects that
are poorly understood while autonomic responses including baroreflex function are not …

[HTML][HTML] Acclimation to a thermoneutral environment abolishes age-associated alterations in heart rate and heart rate variability in conscious, unrestrained mice

JE Axsom, AP Nanavati, CA Rutishauser, JE Bonin… - Geroscience, 2020 - Springer
Mice are among the most widely used translational models of cardiovascular aging and offer
a method to quickly assess lifespan changes in a controlled environment. The standard …

[HTML][HTML] The end effector of circadian heart rate variation: the sinoatrial node pacemaker cell

Y Yaniv, EG Lakatta - BMB reports, 2015 - ncbi.nlm.nih.gov
Cardiovascular function is regulated by the rhythmicity of circadian, infradian and ultradian
clocks. Specific time scales of different cell types drive their functions: circadian gene …

[HTML][HTML] Beating rate variability of isolated mammal sinoatrial node tissue: insight into its contribution to heart rate variability

O Shemla, K Tsutsui, JA Behar, Y Yaniv - Frontiers in Neuroscience, 2021 - frontiersin.org
Background Because of the complexity of the interaction between the internal pacemaker
mechanisms, cell interconnected signals, and interaction with other body systems, study of …