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Updated: Feb 23, 2026

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v-SNARE function in chromaffin cells.

Madhurima Dhara1, Ralf Mohrmann2, Dieter Bruns3

  • 1Molecular Neurophysiology, CIPMM, Medical Faculty, Saarland University, 66421, Homburg/Saar, Germany.

Pflugers Archiv : European Journal of Physiology
|September 10, 2017
PubMed
Summary

This review explores how vesicle fusion, regulated by SNARE proteins and accessory factors, enables rapid communication in cells. It highlights molecular mechanisms for synchronized release and cargo discharge, using chromaffin cells as a model.

Keywords:
Ca2+-triggered exocytosisExocytosisMembrane fusionSNARE proteinsSNARE regulators

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Area of Science:

  • Cellular Biology
  • Neuroscience
  • Molecular Biology

Background:

  • Vesicle fusion drives intracellular trafficking and intercellular communication, crucial for processes like synaptic transmission.
  • Exocytosis mechanisms are key to understanding neural information processing and cellular responses.
  • Neuronal and neuroendocrine cells utilize conserved molecular machinery for vesicular release, including SNARE proteins.

Purpose of the Study:

  • To review recent advances in the molecular mechanisms of exocytosis.
  • To highlight the organization of SNAREpins for synchronized vesicle release.
  • To focus on the role of vesicular SNAREs and regulators in fusion and cargo discharge.

Main Methods:

  • Focus on structure-function analyses in chromaffin cells.
  • Detailed measurements of vesicle fusion under controlled intracellular calcium levels.
  • Review of molecular players like SNAREs, Sec1/Munc18-like proteins, synaptotagmin, and complexin.

Main Results:

  • SNAREpins are organized into functional units for synchronized release.
  • Vesicular SNAREs play a critical role in fusion and rapid cargo discharge.
  • Regulatory proteins like synaptotagmin and complexin enhance stimulus-secretion coupling.

Conclusions:

  • Understanding SNARE complex regulation is vital for precise control of exocytosis.
  • Chromaffin cells provide a valuable model for studying fusion dynamics and calcium-dependent secretion.
  • Further research into these mechanisms will advance our knowledge of cellular communication and neural function.