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Related Experiment Videos

Identification of eosinophils by flow cytometry

A M Thurau1, U Schylz, V Wolf

  • 1Institut für Immunologie der medizinischen Fakultät, Universität Rostock, Germany.

Cytometry
|February 1, 1996
PubMed
Summary

A new flow cytometry method accurately identifies eosinophils in blood. This technique differentiates eosinophils from neutrophils and detects activated or degranulated cells, showing promise for clinical applications.

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Area of Science:

  • Immunology
  • Hematology
  • Analytical Chemistry

Background:

  • Eosinophils play a crucial role in allergic inflammation and immune responses.
  • Accurate enumeration and characterization of eosinophils are essential for diagnosing and monitoring various diseases.
  • Existing methods for eosinophil analysis can be labor-intensive or lack specificity.

Purpose of the Study:

  • To establish a reliable flow cytometric method for identifying and characterizing eosinophils in lysed whole blood.
  • To validate the technique against established methods and assess its applicability in disease states.
  • To investigate the potential of flow cytometry in detecting activated and degranulated eosinophils.

Main Methods:

  • Development of a two-step gating protocol utilizing autofluorescence and side scatter properties of eosinophils.

Related Experiment Videos

  • Differentiation of eosinophils from neutrophils using CD16 and CD49d expression markers.
  • Validation using purified eosinophils, analysis of degranulated eosinophils, and comparison with microscopic evaluation in patient samples.

    • Main Results:

    • The flow cytometry method successfully identified eosinophils in lysed whole blood, including normodense and hypodense populations.
    • A strong correlation (r = 0.921) was observed between flow cytometry and microscopic eosinophil counts.
    • The method detected activated eosinophils (CD69+) and showed correlations with atopic dermatitis severity (SCORAD) and serum creatinine levels.

    Conclusions:

    • The established flow cytometry technique provides an accurate and efficient means for eosinophil identification and characterization.
    • This method is applicable to various eosinophil subsets and can detect cellular activation and degranulation.
    • The technique holds significant potential for clinical diagnostics and research, particularly in allergic and inflammatory conditions.