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CD 45 gating correlates with bone marrow differential

R O Rainer1, L Hodges, G T Seltzer

  • 1Department of Pathology, Bowman Gray School of Medicine, Winston-Salem, North Carolina Baptist Hospital 27157, USA.

Cytometry
|June 15, 1995
PubMed
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This study validates a flow cytometry gating method for bone marrow differentials. The method shows high correlation with manual differentials, offering an efficient tool for leukemia diagnosis.

Area of Science:

  • Hematology
  • Immunology
  • Biotechnology

Background:

  • Accurate bone marrow differential counts are crucial for diagnosing hematologic malignancies.
  • Traditional manual differentials are labor-intensive and subject to inter-observer variability.
  • Flow cytometry offers a high-throughput method for cell analysis.

Purpose of the Study:

  • To assess a flow cytometric gating method for bone marrow differential analysis.
  • To evaluate the correlation between flow cytometry and manual differentials in abnormal bone marrows.
  • To determine the utility of this method in identifying leukemic blasts.

Main Methods:

  • A flow cytometric gating strategy based on CD45 expression and Right Angle Light Scatter (RALS) was developed.
  • Fifty bone marrow specimens with suspected leukemia were analyzed.

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  • Gates were set on normal bone marrow cell clusters to differentiate abnormal cells.

    • Main Results:

    • High correlation (r values ranging from 0.707 to 0.914) was observed between flow cytometry and manual differentials for various cell types.
    • Leukemic blasts and other cell populations formed discrete clusters on CD45 vs. RALS plots.
    • A small number of discrepancies were noted due to false positives/negatives and peripheral contamination.

    Conclusions:

    • The flow cytometric gating method is a powerful and relatively easy tool for automated bone marrow differentials.
    • This method significantly enhances the identification and lineage assessment of leukemic blasts.
    • It provides an inexpensive and efficient alternative to manual differentials for bone marrow specimens.