ArticleProceedings of the National Academy of Sciences of the United States of America2017
Myosin filament activation in the heart is tuned to the mechanical task.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
92 citing papers in PubMed, 1 synthesis or guideline pooled it, 142 citations in OpenAlex.
- Implications of S-glutathionylation of sarcomere proteins in cardiac disorders, therapies, and diagnosis.Frontiers in cardiovascular medicine · 2022Pooled it
- Evidence for a role of adverse sarcomere signaling in atrial fibrillation induction.Journal of molecular and cellular cardiology plus · 2026Review
- Probing relaxed myosin states in hypertrophic cardiomyopathy by second harmonic-generation microscopy.eLife · 2026Article
- Myosin motor dynamics and cardiac function: Insights from in vivo small-angle X-ray scattering and pressure-volume analysis.The Journal of physiology · 2026Article
- Porcine Left Atrial and Ventricular Thick Filaments Exhibit Distinct Resting Structures and Calcium-dependent Responses.bioRxiv : the preprint server for biology · 2026Article
- First-phase ejection fraction and ventricular-arterial coupling across the lifespan: An in silico analysis.Physiological reports · 2026Article
- Muscle Diffraction at the Life Science X-ray Scattering Beamline.bioRxiv : the preprint server for biology · 2026Article
- Cardiac myosin-binding protein-C acts as a tunable load sensor to regulate afterload dependence of ventricular function.American journal of physiology. Heart and circulatory physiology · 2025Article
- Myosin binding protein-C modulates loaded sarcomere shortening in rodent permeabilized cardiac myocytes.The Journal of general physiology · 2025Article
- Myosin-actin crossbridge independent sarcomere length induced CaJournal of molecular and cellular cardiology · 2025Article
- The Mechanism of Modulation of Cardiac Force by Temperature.International journal of molecular sciences · 2025Article
- Functional control of myosin motors in the cardiac cycle.Nature reviews. Cardiology · 2025Review
- An integrated picture of the structural pathways controlling the heart performance.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Load-dependence of the activation of myosin filaments in heart muscle.The Journal of physiology · 2024Article
- Calcium has a direct effect on thick filament activation in porcine myocardium.The Journal of general physiology · 2024Article
- Super-relaxed or super-stressed: Modeling length-dependent activation in cardiac muscle.Biophysical journal · 2024Article
- Sarcomere, troponin, and myosin X-ray diffraction signals can be resolved in single cardiomyocytes.Biophysical journal · 2024Article
- Cardiac length-dependent activation driven by force-dependent thick-filament dynamics.Biophysical journal · 2024Article
- Dilated cardiomyopathy mutation in beta-cardiac myosin enhances actin activation of the power stroke and phosphate release.PNAS nexus · 2024Article
- Super-relaxed myosins contribute to respiratory muscle hibernation in mechanically ventilated patients.Science translational medicine · 2024Article
32 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 4 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mammalian heart pumps blood through the vessels, maintaining the dynamic equilibrium in a circulatory system driven by two pumps in series. This vital function is based on the fine-tuning of cardiac performance by the Frank-Starling mechanism that relates the pressure exerted by the contracting ventricle (end systolic pressure) to its volume (end systolic volume). At the level of the sarcomere, the structural unit of the cardiac myocytes, the Frank-Starling mechanism consists of the increase in active force with the increase of sarcomere length (length-dependent activation). We combine sarcomere mechanics and micrometer-nanometer-scale X-ray diffraction from synchrotron light in intact ventricular trabeculae from the rat to measure the axial movement of the myosin motors during the diastole-systole cycle under sarcomere length control. We find that the number of myosin motors leaving the off, ATP hydrolysis-unavailable state characteristic of the diastole is adjusted to the sarcomere length-dependent systolic force. This mechanosensing-based regulation of the thick filament makes the energetic cost of the systole rapidly tuned to the mechanical task, revealing a prime aspect of the Frank-Starling mechanism. The regulation is putatively impaired by cardiomyopathy-causing mutations that affect the intramolecular and intermolecular interactions controlling the off state of the motors.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.