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Exocytosis

Exocytosis

Exocytosis is used to release material from cells. Like other bulk transport mechanisms, exocytosis requires energy.

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Related Experiment Video

Updated: May 21, 2025

Monitoring the Effect of Osmotic Stress on Secretory Vesicles and Exocytosis

Monitoring the Effect of Osmotic Stress on Secretory Vesicles and Exocytosis

Published on: February 19, 2018

Distinct Exocytosis Behavior at Synaptic Membrane Protein-Protein Coupled Cell-Electrode Interfaces Revealed by

Wonkyung Cho¹, Min-Ah Oh¹, Chung Mu Kang²

¹Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|March 27, 2025

Summary

This study shows that genetically engineered neuroligin-2 (eNLG2) on electrodes slows down exocytosis (neurotransmitter release) and increases release per event, offering new insights into neural communication.

Keywords:

amperometry cell–electrode interface exocytosis synaptic cell adhesion

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Last Updated: May 21, 2025

Monitoring the Effect of Osmotic Stress on Secretory Vesicles and Exocytosis

Monitoring the Effect of Osmotic Stress on Secretory Vesicles and Exocytosis

Published on: February 19, 2018

Single Cell Measurement of Dopamine Release with Simultaneous Voltage-clamp and Amperometry

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Published on: November 21, 2012

Paired Whole Cell Recordings in Organotypic Hippocampal Slices

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Published on: September 28, 2014

Area of Science:

Neuroscience
Biotechnology
Biophysics

Background:

Understanding neural communication requires studying single-cell activity.
Protein-mediated cell adhesion at cell-electrode interfaces impacts cellular processes like exocytosis.
The specific role of this interaction in exocytosis is not well understood.

Purpose of the Study:

To develop a biospecific electrode platform using genetically engineered neuroligin-2 (eNLG2).
To investigate the effect of eNLG2 on exocytosis in PC12 cells.
To explore how synaptic proteins influence vesicle fusion dynamics.

Main Methods:

Fabrication of a biospecific electrode platform functionalized with eNLG2.
Neuroelectrochemical analysis of exocytosis in PC12 cells.
Comparison with non-protein-modified and laminin-modified electrodes.

Main Results:

eNLG2-modified electrodes significantly slowed exocytosis kinetics.
Neurotransmitter release per exocytosis event increased with eNLG2 modification.
Compared to non-protein and laminin electrodes, eNLG2 showed distinct effects.

Conclusions:

Synaptic membrane proteins like neuroligin and neurexin modulate vesicle fusion dynamics.
These proteins likely influence membrane properties and intracellular signaling pathways.
Combining biospecific neural interfacing with neuroelectrochemical methods provides deep insights into exocytosis.