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Related Experiment Videos

Fusion pore in live cells.

Bhanu P Jena1

  • 1Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan 48201, USA.

News in Physiological Sciences : an International Journal of Physiology Produced Jointly by the International Union of Physiological Sciences and the American Physiological Society
|November 16, 2002
PubMed
Summary
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Secretory cells release contents through fusion pores. Atomic force microscopy now visualizes these fusion pores in real-time, revealing their structure and dynamics.

Area of Science:

  • Cell biology
  • Biophysics
  • Membrane dynamics

Background:

  • Secretory cells release cellular contents via fusion of secretory vesicles with the plasma membrane.
  • The existence of fusion pores, transient openings facilitating this release, has been inferred from electrophysiological data.

Purpose of the Study:

  • To directly visualize and characterize the fusion pore at the plasma membrane.
  • To investigate the morphology and dynamics of fusion pores in real-time using high-resolution microscopy.

Main Methods:

  • Utilized atomic force microscopy (AFM) for high-resolution imaging of live secretory cells.
  • Performed real-time, near-nanometer resolution measurements of membrane fusion events.

Main Results:

Related Experiment Videos

  • Directly demonstrated the presence of fusion pores during vesicle fusion with the plasma membrane.
  • Provided unprecedented visualization of fusion pore morphology and dynamic changes.
  • Characterized fusion pore behavior at near-nanometer resolution.

Conclusions:

  • Atomic force microscopy provides direct evidence for fusion pores.
  • This technique offers new insights into the structural and dynamic aspects of exocytosis at the molecular level.