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Related Experiment Video

Updated: May 22, 2026

Combined Infusion and Stimulation with Fast-Scan Cyclic Voltammetry (CIS-FSCV) to Assess Ventral Tegmental Area Receptor Regulation of Phasic Dopamine

Combined Infusion and Stimulation with Fast-Scan Cyclic Voltammetry (CIS-FSCV) to Assess Ventral Tegmental Area Receptor Regulation of Phasic Dopamine

Published on: April 23, 2020

Calbindin controls release probability in ventral tegmental area dopamine neurons.

Ping-Yue Pan¹, Timothy A Ryan

¹Department of Biochemistry, Weill Cornell Medical College, New York, NY, USA. taryan@med.cornell.edu

Nature Neuroscience

|May 1, 2012

Summary

Midbrain dopamine release is controlled by calcium buffering. Calbindin-D28k in ventral tegmental area neurons regulates dopamine exocytosis, unlike substantia nigra neurons.

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Last Updated: May 22, 2026

Combined Infusion and Stimulation with Fast-Scan Cyclic Voltammetry (CIS-FSCV) to Assess Ventral Tegmental Area Receptor Regulation of Phasic Dopamine

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Published on: April 23, 2020

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Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area

Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area

Published on: August 10, 2012

Area of Science:

Neuroscience
Molecular Biology
Neurochemistry

Background:

The molecular mechanisms governing midbrain dopamine release remain largely uncharacterized.
Dopamine signaling is crucial for various brain functions, including reward, motivation, and motor control.

Purpose of the Study:

To investigate the molecular control of dopamine release in the midbrain.
To compare dopamine exocytosis regulation between ventral tegmental area (VTA) and substantia nigra (SN) neurons.

Main Methods:

Utilized high-fidelity imaging techniques.
Employed pHluorin-tagged vesicular monoamine transporter 2 (VMAT2) in dopamine neurons.
Measured calcium entry and exocytosis coupling.

Main Results:

Dopamine neuron exocytosis exhibited looser coupling to calcium entry compared to fast synapses.
In VTA neurons, exocytosis was efficiently controlled by the calcium buffer calbindin-D28k.
VTA neurons maintained a lower vesicular release probability than SN neurons.

Conclusions:

Calbindin-D28k plays a key role in regulating dopamine exocytosis in VTA neurons.
Differences in calcium buffering contribute to distinct release properties between VTA and SN dopamine neurons.
This study provides novel insights into the molecular regulation of midbrain dopamine signaling.