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Flow cytometric analysis of normal human megakaryocytes
A Tomer1, L A Harker, S A Burstein
1Department of Basic and Clinical Research, Scripps Clinic and Research Foundation, La Jolla, CA 92037.
Blood
|May 1, 1988
Summary
Flow cytometry effectively analyzes human megakaryocytes, correlating cell size, ploidy, and glycoprotein IIb/IIIa expression. This method aids in studying megakaryocyte characteristics in normal and pathologic states.
Area of Science:
- Hematology
- Cell Biology
- Biotechnology
Background:
- Megakaryocytes are crucial for platelet production.
- Understanding megakaryocyte characteristics is vital for hematologic research.
- Flow cytometry offers a quantitative method for cell analysis.
Purpose of the Study:
- To analyze human megakaryocytes from bone marrow aspirates using flow cytometry.
- To assess megakaryocyte size, granularity, glycoprotein (GP) IIb/IIIa expression, and ploidy.
- To establish correlations between these parameters and evaluate flow cytometry's utility.
Main Methods:
- Human bone marrow aspirates were processed to enrich megakaryocytes using Percoll density gradients.
- Megakaryocytes were labeled with anti-GPIIb/IIIa antibody and stained with propidium iodide for DNA content.
- Two-color flow cytometry analyzed forward scatter (FSC), side scatter (SSC), and membrane fluorescence; sorted cells were validated with an ACAS analyzer.
Main Results:
- Strong correlations were found between megakaryocyte size, SSC, and membrane fluorescence (GPIIb/IIIa expression).
- Mean megakaryocyte diameter was 28.1 ± 12.3 µm, with modal ploidy at 16N.
- GPIIb/IIIa expression increased with cell size and ploidy, but surface epitope density decreased with maturity.
Conclusions:
- Flow cytometry is a valuable tool for rapid analysis of human megakaryocytes.
- The technique can quantify megakaryocyte size, ploidy, and GPIIb/IIIa expression.
- This method is applicable to studying megakaryocytes in both normal and pathological conditions.