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Related Experiment Videos

Subcellular analysis of D-aspartate.

Hai Miao1, Stanislav S Rubakhin, Jonathan V Sweedler

  • 1Department of Chemistry, University of Illinois at Urbana--Champaign, 61801, USA.

Analytical Chemistry
|November 16, 2005
PubMed
Summary
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This study developed a sensitive capillary electrophoresis method to measure D-Aspartate (D-Asp) in single neurons. Glycerol treatment improved sample preparation, revealing D-Asp differences between neuronal cell bodies and processes.

Area of Science:

  • Neuroscience
  • Analytical Chemistry
  • Biochemistry

Background:

  • D-Aspartate (D-Asp) is a molecule found in the central nervous system with roles in cell signaling.
  • Measuring D-Asp in specific subcellular locations like neuronal processes is challenging.
  • Existing methods lack the sensitivity and selectivity for subcellular D-Asp quantification.

Purpose of the Study:

  • To develop a sensitive and selective method for quantifying D-Asp content in single neurons and their subcellular domains.
  • To investigate the distribution of D-Asp within neuronal cell bodies and processes.
  • To improve sample preparation techniques for fragile neuronal structures.

Main Methods:

  • Development of a capillary electrophoresis system with laser-induced fluorescence (LIF) detection.

Related Experiment Videos

  • Chiral separation using cyclodextrin-mediated micellar electrokinetic capillary chromatography.
  • Microvial sampling and derivatization with naphthalene-2,3-dicarboxaldehyde.
  • Glycerol treatment to stabilize neuronal morphology during sample preparation.

    • Main Results:

    • The developed method achieved high sensitivity and selectivity for D-Asp measurement.
    • Glycerol treatment effectively stabilized neuronal processes, improving electrophoretic separation.
    • Significant differences in D-Asp percentages were observed in processes of identified Aplysia californica neurons.
    • Higher concentrations of compounds, including D-Asp, were detected in neuronal cell bodies compared to processes.

    Conclusions:

    • The capillary electrophoresis-LIF system provides a powerful tool for subcellular D-Asp analysis in neuroscience.
    • Glycerol treatment is a crucial step for preserving neuronal integrity in sample preparation.
    • D-Asp distribution varies significantly across different neuronal types and subcellular compartments.