Exploring the connection between relaxed myosin states and the Anrep effect

V Sequeira, C Maack, GH Reil, JC Reil - Circulation Research, 2024 - Am Heart Assoc
The Anrep effect is an adaptive response that increases left ventricular contractility following
an acute rise in afterload. Although the mechanistic origin remains undefined, recent …

[HTML][HTML] Methods for assessing cardiac myofilament calcium sensitivity

JM Dowrick, AJ Taberner, JC Han, K Tran - Frontiers in Physiology, 2023 - frontiersin.org
Myofilament calcium (Ca2+) sensitivity is one of several mechanisms by which force
production of cardiac muscle is modulated to meet the ever-changing demands placed on …

Nitrosylation of cardiac CaMKII at Cys290 mediates mechanical afterload‐induced increases in Ca2+ transient and Ca2+ sparks

CC Alim, CY Ko, J Mira Hernandez… - The Journal of …, 2022 - Wiley Online Library
Cardiac mechanical afterload induces an intrinsic autoregulatory increase in myocyte Ca2+
dynamics and contractility to enhance contraction (known as the Anrep effect or slow force …

CaMKII activity contributes to homeometric autoregulation of the heart: A novel mechanism for the Anrep effect

JC Reil, GH Reil, Á Kovács, V Sequeira… - The Journal of …, 2020 - Wiley Online Library
Key points The Anrep effect represents the alteration of left ventricular (LV) contractility to
acutely enhanced afterload in a few seconds, thereby preserving stroke volume (SV) at …

[HTML][HTML] Strain rate of stretch affects crossbridge detachment during relaxation of intact cardiac trabeculae

BCW Tanner, BM Palmer, CS Chung - Plos one, 2024 - journals.plos.org
Mechanical Control of Relaxation refers to the dependence of myocardial relaxation on the
strain rate just prior to relaxation, but the mechanisms of enhanced relaxation are not well …

[HTML][HTML] Harnessing conserved signaling and metabolic pathways to enhance the maturation of functional engineered tissues

NI Callaghan, LJ Durland, RG Ireland… - NPJ Regenerative …, 2022 - nature.com
The development of induced-pluripotent stem cell (iPSC)-derived cell types offers promise
for basic science, drug testing, disease modeling, personalized medicine, and translatable …

Simultaneous brightfield, fluorescence, and optical coherence tomographic imaging of contracting cardiac trabeculae ex vivo

JM Dowrick, AJ Anderson, ML Cheuk, K Tran… - JoVE (Journal of …, 2021 - jove.com
In cardiac muscle, intracellular Ca2+ transients activate contractile myofilaments, causing
contraction, macroscopic shortening, and geometric deformation. Our understanding of the …

Deciphering the dynamics: Exploring the impact of mechanical forces on histone acetylation

J Cai, Y Deng, Z Min, C Li, Z Zhao, D Jing - The FASEB Journal, 2024 - Wiley Online Library
Living cells navigate a complex landscape of mechanical cues that influence their behavior
and fate, originating from both internal and external sources. At the molecular level, the …

Control of cardiac contraction by sodium: Promises, reckonings, and new beginnings

DW Hilgemann - Cell Calcium, 2020 - Elsevier
Several generations of cardiac physiologists have verified that basal cardiac contractility
depends strongly on the transsarcolemmal Na gradient, and the underlying molecular …

Disruption of transverse‐tubular network reduces energy efficiency in cardiac muscle contraction

NG Mellor, T Pham, K Tran, DS Loiselle… - Acta …, 2021 - Wiley Online Library
Aim Altered organization of the transverse‐tubular network is an early pathological event
occurring even prior to the onset of heart failure. Such t‐tubular remodelling disturbs the …