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Related Experiment Videos

Shear force and its effect on cell structure and function.

R M Nerem1

  • 1School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332.

ASGSB Bulletin : Publication of the American Society for Gravitational and Space Biology
|July 1, 1991
PubMed
Summary
This summary is machine-generated.

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Endothelial cell monolayer formation: effect of substrate and fluid shear stress.

Endothelium : journal of endothelial cell research·2004

Cellular responses to fluid flow, including shape changes and altered function, are influenced by shear stress. These findings are crucial for understanding cell behavior in microgravity and optimizing space experiments.

Area of Science:

  • Cell Biology
  • Biophysics
  • Physiology

Background:

  • Endothelial cells lining blood vessels are exposed to various fluid flow conditions.
  • Understanding cellular responses to mechanical forces like shear stress is vital for cardiovascular health.
  • Previous research has explored the impact of flow on cellular structure and function.

Purpose of the Study:

  • To review cell culture studies on the effects of laminar flow and wall shear stress on bovine aortic endothelial cells.
  • To investigate how fluid dynamics influence endothelial cell behavior and function.
  • To assess the implications of these findings for microgravity research and space-based cell biology.

Main Methods:

  • Review of existing cell culture experiments examining endothelial cells under steady-state and pulsatile flow.

Related Experiment Videos

  • Analysis of cellular responses including shape, F-actin reorganization, and cell stiffness.
  • Evaluation of functional changes such as replication, secretion, and endocytosis.

    • Main Results:

    • Steady flow causes endothelial cells to elongate, align with flow, and increase stiffness.
    • Fluid flow impacts cellular functions like replication, secretion of vasoactive substances, and endocytosis.
    • Pulsatile flow generally enhances the effects observed under steady flow conditions.

    Conclusions:

    • Physical forces, even small ones, significantly influence cell behavior and function.
    • Cellular responses to flow are dependent on shear stress levels, duration, surface, and media.
    • Microgravity may represent an unloading force with observable cellular effects, necessitating controlled conditions in space experiments.