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Related Experiment Video

Updated: Sep 14, 2025

Flow Cytometric Analysis of Lymphocyte Infiltration in Central Nervous System during Experimental Autoimmune Encephalomyelitis
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Rapid one-step protocol for exploring immune cells in cerebrospinal fluid.

Ewa Wallisky Millet1, Fabrice Malergue2, Gregorio Petrirena Hernandez3

  • 1Beckman Coulter Life Science, Immunotech, Research and development, Marseille, France; Aix Marseille Univ, INSERM, INS, UMR 1106, Inst Neurosci Syst, Marseille, France.

Journal of Neuroimmunology
|July 20, 2025
PubMed
Summary

A new one-step flow cytometry protocol enables rapid, standardized analysis of cerebrospinal fluid (CSF) immune cells. This method ensures accurate cell counting and subset profiling, crucial for diagnosing nervous system disorders, even when samples are delayed.

Keywords:
Cerebrospinal fluidFlow cytometryMonocytesPre-analytical process

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Area of Science:

  • Neuroimmunology
  • Clinical Diagnostics
  • Flow Cytometry

Background:

  • Cerebrospinal fluid (CSF) immune cell profiling aids in diagnosing nervous system pathologies.
  • Current methods face challenges due to rapid cell degradation, limited sample volume, and non-standardized staining protocols.
  • There is a critical need for improved pre-analytical and analytical processes for CSF immune cell analysis.

Purpose of the Study:

  • To develop and validate a one-step flow cytometry protocol for analyzing CSF immune cells.
  • To assess the repeatability, stability, and impact of sample processing delays on CSF immune cell analysis.
  • To establish a rapid, standardized, and reproducible method for multiparametric CSF immune cell analysis.

Main Methods:

  • Developed a one-step antibody-based protocol for CSF cell analysis without a washing step.
  • Validated the protocol's repeatability and stability over 3 days using mild fixation.
  • Assessed the impact of post-collection delays on cell counts and immune staining.

Main Results:

  • The one-step protocol demonstrated high repeatability and stability for immune cell subset counts and staining over 3 days.
  • Direct labeling without washing, coupled with cytometer performance, ensures precise and reproducible cell counting.
  • Significant loss of monocytes was observed in samples not processed rapidly after lumbar puncture.

Conclusions:

  • The developed one-step protocol provides a rapid, standardized, and reproducible method for multiparametric CSF immune cell analysis.
  • This protocol addresses limitations of existing methods, improving diagnostic and prognostic capabilities for neurological conditions.
  • Timely processing of CSF samples is essential to prevent the loss of critical immune cell populations like monocytes.