ArticleBiophysical journal2011
Substrate stiffness increases twitch power of neonatal cardiomyocytes in correlation with changes in myofibril structure and intracellular calcium.
Article in Biophysical journal, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers.
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
85 citing papers in PubMed, 138 citations in OpenAlex.
- Cardiac regeneration and repair: the emerging mechanisms and therapeutic approaches.Molecular biomedicine · 2026Review
- Restoration of structural organization in engineered cardiac microtissues is promoted by cardiomyocyte beating.Communications biology · 2026Article
- Preventing hypocontractility-induced fibroblast expansion alleviates dilated cardiomyopathy.Science (New York, N.Y.) · 2025Article
- Mechanosensitive biochemical imprinting of the talin interaction with DLC1 regulates RhoA activity and cardiomyocyte remodeling.Science advances · 2025Article
- Biaxial length-tension relationship in single cardiac myocytes.Biophysical journal · 2025Article
- Harnessing native blueprints for designing bioinks to bioprint functional cardiac tissue.iScience · 2025Review
- Bioprinting approaches in cardiac tissue engineering to reproduce blood-pumping heart function.iScience · 2025Review
- Fibrotic extracellular matrix impacts cardiomyocyte phenotype and function in an iPSC-derived isogenic model of cardiac fibrosis.Translational research : the journal of laboratory and clinical medicine · 2024Article
- Reduced Graphene-Oxide-Doped Elastic Biodegradable Polyurethane Fibers for Cardiomyocyte Maturation.ACS biomaterials science & engineering · 2024Article
- Architecture design and advanced manufacturing of heart-on-a-chip: scaffolds, stimulation and sensors.Microsystems & nanoengineering · 2024Review
- Contraction pressure analysis using optical imaging in normal and MYBPC3-mutated hiPSC-derived cardiomyocytes grown on matrices with tunable stiffness.Biomaterials and biosystems · 2022Article
- A comprehensive review of computational and image analysis techniques for quantitative evaluation of striated muscle tissue architecture.Biophysics reviews · 2022Review
- Human pluripotent stem cell-derived cardiomyocytes align under cyclic strain when guided by cardiac fibroblasts.APL bioengineering · 2022Article
- The harder the climb the better the view: The impact of substrate stiffness on cardiomyocyte fate.Journal of molecular and cellular cardiology · 2022Review
- DNA Tension Probes Show that Cardiomyocyte Maturation Is Sensitive to the Piconewton Traction Forces Transmitted by Integrins.ACS nano · 2022Article
- Mimicking Native Heart Tissue Physiology and Pathology in Silk Fibroin Constructs through a Perfusion-Based Dynamic Mechanical Stimulation Microdevice.Advanced healthcare materials · 2022Article
- Conventional rigid 2D substrates cause complex contractile signals in monolayers of human induced pluripotent stem cell-derived cardiomyocytes.The Journal of physiology · 2022Article
- Cooperation between myofibril growth and costamere maturation in human cardiomyocytes.Frontiers in bioengineering and biotechnology · 2022Article
- Calcium handling maturation and adaptation to increased substrate stiffness in human iPSC-derived cardiomyocytes: The impact of full-length dystrophin deficiency.Frontiers in physiology · 2022Article
- Microengineered platforms for characterizing the contractile function of in vitro cardiac models.Microsystems & nanoengineering · 2022Review
25 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
4 authors at 1 institution in 1 country.
Funding
Abstract
During neonatal development, there is an increase in myocardial stiffness that coincides with an increase in the contractility of the heart. In vitro assays have shown that substrate stiffness plays a role in regulating the twitch forces produced by immature cardiomyocytes. However, its effect on twitch power is unclear due to difficulties in measuring the twitch velocity of cardiomyocytes. Here, we introduce what we consider a novel approach to quantify twitch power by combining the temporal resolution of optical line scanning with the subcellular force resolution of micropost arrays. Using this approach, twitch power was found to be greater for cells cultured on stiffer posts, despite having lower twitch velocities. The increased power was attributed in part to improved myofibril structure (increased sarcomere length and Z-band width) and intracellular calcium levels. Immunofluorescent staining of α-actin revealed that cardiomyocytes had greater sarcomere length and Z-band width when cultured on stiffer arrays. Moreover, the concentration of intracellular calcium at rest and its rise with each twitch contraction was greater for cells on the stiffer posts. Altogether, these findings indicate that cardiomyocytes respond to substrate stiffness with biomechanical and biochemical changes that lead to an increase in cardiac contractility.
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.