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Cell surface area regulation and membrane tension.

C E Morris1, U Homann

  • 1Department of Medicine, University of Ottawa, Neuroscience, Loeb Health Research Institute, Ottawa Hospital, Ontario, Canada.

The Journal of Membrane Biology
|February 28, 2001
PubMed
Summary
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Cells actively regulate their surface area (SA), not just volume. This distinct cellular task, surface area regulation (SAR), relies on membrane tension and involves intricate membrane trafficking in both animal and plant cells.

Area of Science:

  • Cell Biology
  • Physiology
  • Membrane Biology

Background:

  • Cell volume and shape regulation are well-studied.
  • Cell surface area regulation (SAR) is a distinct, less recognized cellular task.
  • Most cells utilize endomembranes for plasma membrane remodeling, unlike anucleate cells.

Purpose of the Study:

  • Highlight SAR as a discrete cellular process.
  • Survey evidence linking membrane tension to SAR.
  • Examine membrane strength maintenance during membrane turnover in SAR.

Main Methods:

  • Review of existing literature on cell membrane dynamics.
  • Analysis of membrane trafficking in relation to surface area homeostasis.
  • Examination of tension-sensitive mechanisms in animal and plant cells.

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Main Results:

  • Surface area regulation (SAR) is a distinct cellular task, separate from volume regulation.
  • Plasma membrane tension is proposed as a key homeostatic regulator of surface area.
  • Cells respond to deviations in membrane tension to maintain surface area homeostasis.

Conclusions:

  • Surface area regulation (SAR) is a critical cellular function.
  • Membrane tension serves as a central set point for maintaining surface area homeostasis.
  • Understanding SAR provides insights into cellular mechanics and membrane dynamics.