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Many biological molecules in the brain interstitial fluid are involved in neuronal functions. Therefore, measuring the levels of these molecules in the extracellular fluid would provide deep insights into the physiological/pathological mechanisms underlying brain functions/disorders. In vivo microdialysis is a powerful technique used to examine the extracellular levels of various molecules in the brains of living animals. In neuroscience research, this technique has been widely used to investigate relatively small molecules including neurotransmitters and amino acids. However, recent advances in technology have made it possible to assess large molecules in the brain interstitial fluid, such as signaling peptides and proteins, using microdialysis probes with high-molecular-weight cutoff membranes. This chapter describes an in vivo microdialysis method to collect and measure the levels of large biological molecules in the extracellular fluid of the brains of freely moving mice. © 2024. The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature.


Makoto Kondo. In Vivo Brain Microdialysis. Methods in molecular biology (Clifton, N.J.). 2024;2794:259-269

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PMID: 38630235

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