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Related Concept Videos

Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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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Related Experiment Video

Updated: May 11, 2026

Propagation of Dental and Respiratory Cells and Organs in Microgravity
06:29

Propagation of Dental and Respiratory Cells and Organs in Microgravity

Published on: May 25, 2021

[Cell-to-cell interactions in microgravity: experiments in vitro].

L B Buravkova, O V Grigorieva, N A Konstantinova

    Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
    |May 24, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Microgravity alters cell-to-cell interactions and gene expression without contact inhibition. Prolonged exposure impairs differentiation and reprofiles genes controlling cell activities in stem cells.

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    Area of Science:

    • Cell biology
    • Space biology
    • Biotechnology

    Background:

    • Cell-to-cell interactions are crucial for tissue development and function.
    • Understanding how microgravity affects cellular processes is vital for space exploration and medicine.
    • Previous studies suggest microgravity can impact cell behavior, but comprehensive reviews are needed.

    Purpose of the Study:

    • To review the effects of space and simulated microgravity on cell-to-cell interactions.
    • To analyze gene expression changes in response to microgravity.
    • To investigate the impact of microgravity on cell differentiation.

    Main Methods:

    • Review of studies involving human lymphocytes and K-562 tumor myeloblasts.
    • Analysis of embryoid body formation and differentiation of mouse embryonic stem cells (ESCs).
    • Examination of gene differentiation and expression in human multipotent mesenchymal cells (MSCs) under simulated microgravity.

    Main Results:

    • Microgravity modifies cell-to-cell interactions without inducing cell contact inhibition.
    • Microgravity causes reversible changes in genes regulating cytoskeleton, focal adhesion proteins, and cytokines.
    • Prolonged simulated microgravity inhibits progenitor cell differentiation and reprofiles genes controlling cell activities.

    Conclusions:

    • Microgravity significantly impacts cell-to-cell interactions and gene expression patterns.
    • Reversible changes in gene expression related to cellular structure and signaling occur under microgravity.
    • Inhibition of differentiation and reprofiling of gene expression highlight potential risks of prolonged microgravity exposure for progenitor cells.