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Related Experiment Video

Updated: May 24, 2026

In Vivo Microdialysis Method to Collect Large Extracellular Proteins from Brain Interstitial Fluid with High-molecular Weight Cut-off Probes
08:17

In Vivo Microdialysis Method to Collect Large Extracellular Proteins from Brain Interstitial Fluid with High-molecular Weight Cut-off Probes

Published on: September 26, 2018

Brain microdialysis in freely moving animals.

Gianfranco Bazzu1, Alice Biosa, Donatella Farina

  • 1Department of Neuroscience, Medical School, University of Sassari, Sassari, Italy.

Methods in Molecular Biology (Clifton, N.J.)
|February 28, 2012
PubMed
Summary

This study details brain microdialysis, a method for monitoring brain neurochemistry in freely moving animals. It outlines procedures for probe implantation and analysis of neurochemicals like catecholamines using high-performance liquid chromatography.

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Area of Science:

  • Neuroscience
  • Analytical Chemistry

Background:

  • Brain microdialysis enables real-time monitoring of neurochemistry in awake, freely moving animals.
  • The technique involves implanting a microdialysis probe into a specific brain region and perfusing it with artificial extracellular fluid.

Purpose of the Study:

  • To describe a detailed protocol for performing brain microdialysis experiments in rats and mice.
  • To outline the high-performance liquid chromatographic (HPLC) determination of key neurochemicals.

Main Methods:

  • Surgical implantation of microdialysis probes into target brain regions of rodents.
  • Perfusion of probes with artificial cerebrospinal fluid to collect extracellular fluid samples.
  • Analysis of microdialysate using HPLC with electrochemical detection for quantification of oxidizable molecules.

Main Results:

  • Successful implementation of microdialysis in freely moving rats and mice.
  • Detailed methodology for the quantification of ascorbic acid, uric acid, catecholamines, and indolamines.
  • Demonstration of HPLC-electrochemical detection for accurate neurochemical measurement.

Conclusions:

  • Brain microdialysis is a valuable technique for dynamic neurochemical monitoring in vivo.
  • The described protocol provides a comprehensive guide for researchers.
  • HPLC analysis allows for precise quantification of essential neurochemicals in the brain extracellular space.