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Related Concept Videos

Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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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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Resting Potential Decay01:15

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The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
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Resting Membrane Potential01:24

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The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
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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. 
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Generation of Action Potential in Skeletal Muscles01:24

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Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
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Membrane potential mediates the cellular response to mechanical pressure.

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    Cellular response to mechanical forces is mediated by membrane potential, which regulates cell growth, proliferation, and survival. This finding reveals membrane potential

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    Area of Science:

    • Cellular biology
    • Biophysics

    Background:

    • Mechanical forces influence cellular behavior through unknown mechanisms.
    • Changes in membrane potential are linked to various biological processes like development and cancer.

    Purpose of the Study:

    • To investigate the role of membrane potential in cellular response to mechanical pressure.
    • To elucidate the mechanisms by which mechanical forces regulate cell growth and tissue homeostasis.

    Main Methods:

    • Measuring cellular biomass density and membrane potential under mechanical pressure.
    • Analyzing the impact of altered membrane potential on cell growth, proliferation, and elimination.
    • Investigating signaling pathways, including Hippo and MAPK, regulated by membrane potential.

    Main Results:

    • Mechanical forces alter cellular biomass density, leading to changes in membrane potential.
    • Membrane potential acts as a central regulator of cell growth, proliferation, and elimination in epithelia.
    • Changes in membrane potential modulate signaling through the Hippo and MAPK pathways.

    Conclusions:

    • Membrane potential is the key mediator of cellular responses to mechanical forces.
    • This study identifies membrane potential as a critical upstream regulator of the Hippo signaling pathway.
    • The findings establish membrane potential as a central regulator of tissue growth and homeostasis.