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Related Concept Videos

Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
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Cell-matrix's Response to Mechanical Forces01:13

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
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Mechanically-gated Ion Channels01:12

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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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Structure of Cardiac Muscles01:13

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Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
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Smooth Muscle Contraction01:25

Smooth Muscle Contraction

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Smooth muscle contraction is a complex process vital for various bodily functions, from maintaining blood vessel tension to facilitating the movement of food through the digestive tract. Unlike striated muscles, smooth muscle contraction begins more slowly and lasts longer.
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Desmoglein-2 Deficiency Drives Mitochondrial Morphological Remodeling in Cardiomyocytes.

American journal of physiology. Heart and circulatory physiology·2026
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Myosin Filaments of Vertebrate Skeletal and Cardiac Muscle are Highly Similar, but not Identical.

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Desmoglein-2 deficiency results in cardiac dysfunction by compromising both Z-disc- and intercalated disc-mediated mechanotransduction.

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Related Experiment Video

Updated: Jul 16, 2025

Combining 3D Magnetic Force Actuator and Multi-Functional Fluorescence Imaging to Study Nucleus Mechanobiology
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Combining 3D Magnetic Force Actuator and Multi-Functional Fluorescence Imaging to Study Nucleus Mechanobiology

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Nucleus Mechanosensing in Cardiomyocytes.

Isabella Leite Coscarella1, Maicon Landim-Vieira1, Hosna Rastegarpouyani2,3

  • 1Department of Biomedical Sciences, Florida State University, Tallahassee, FL 32306, USA.

International Journal of Molecular Sciences
|September 9, 2023
PubMed
Summary
This summary is machine-generated.

Cardiac cells sense mechanical signals, transmitting them to the nucleus to alter gene expression and cell structure. This mechanotransduction process is crucial for understanding heart disease progression.

Keywords:
cardiomyocytescardiomyopathymechanotransduction

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Area of Science:

  • Cardiology
  • Cell Biology
  • Biophysics

Background:

  • Cardiac muscle contraction relies on actin-myosin interactions modulated by calcium ions.
  • Genetic variations in sarcomeric proteins can precipitate cardiac dysfunction.
  • The cardiomyocyte's cytoskeleton, including actin filaments, microtubules, and desmin, links sarcomeres to other cellular components.

Purpose of the Study:

  • To review the key mechanisms of mechanotransduction in cardiomyocytes.
  • To explore how mechanical signals are transmitted from sarcomeres to the nucleus.
  • To understand how this signaling impacts gene expression and nuclear morphology.

Main Methods:

  • This review synthesizes existing research on cardiomyocyte mechanotransduction.
  • It examines the molecular pathways involved in signal transmission.
  • It discusses the role of cytoskeletal connections and nuclear envelope proteins.

Main Results:

  • Mechanical and biochemical signals from sarcomeric contractions are relayed throughout the cardiomyocyte.
  • These signals are sensed by the nucleus, leading to changes in gene expression and nuclear structure.
  • Proteins on the nuclear envelope play a significant role in responding to these mechanical stimuli.

Conclusions:

  • Mechanotransduction in cardiomyocytes links mechanical forces to nuclear responses, influencing cell behavior.
  • Understanding nucleus sensing in conjunction with sarcomeric protein dysfunction aids in comprehending cardiomyopathies.
  • This process is vital for adapting to physiological demands and understanding disease pathogenesis.