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Related Experiment Videos

A selective stain for eosinophils using two oxazine dyes applied sequentially

L Kass1

  • 1Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA.

Biotechnic & Histochemistry : Official Publication of the Biological Stain Commission
|January 1, 1995
PubMed
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A novel staining method using two oxazine dyes selectively stains eosinophil granules black. This technique aids in identifying eosinophils in blood, bone marrow, and urine, particularly for diagnosing interstitial nephritis.

Area of Science:

  • Hematology
  • Histopathology
  • Dye Chemistry

Background:

  • Eosinophils are crucial white blood cells involved in immune responses.
  • Accurate identification of eosinophils is vital for diagnosing various conditions.
  • Existing staining methods may lack specificity or require complex procedures.

Purpose of the Study:

  • To develop a selective and effective staining technique for eosinophils.
  • To evaluate the utility of specific oxazine dyes for eosinophil identification.
  • To assess the application of this staining method in clinical diagnostics.

Main Methods:

  • Utilizing a sequential staining protocol with C.I. basic blue 122 and C.I. basic blue 141.
  • Employing a methanolic solution followed by an alkaline aqueous solution.

Related Experiment Videos

  • Rinsing with an acetate buffer at pH 3.45 to optimize staining.
  • Testing the method on peripheral blood leukocytes, bone marrow, and urine samples.

    • Main Results:

    • Intense black staining of eosinophil granules was consistently observed.
    • The staining demonstrated high selectivity for eosinophils.
    • Other peripheral blood leukocytes showed minimal to no staining.
    • The procedure proved effective across different sample types.

    Conclusions:

    • This two-dye staining method provides a selective and sensitive approach for eosinophil detection.
    • The technique is potentially valuable for diagnosing conditions associated with eosinophilia, such as interstitial nephritis with eosinophiluria.
    • Further validation in clinical settings is warranted to establish its diagnostic utility.