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Comparison of monocyte separation methods using flow cytometric analysis.

B M Jones1, J K Nicholson, R C Holman

  • 1Division of Host Factors, Centers for Disease Control, Atlanta, GA 30333.

Journal of Immunological Methods
|December 20, 1989
PubMed
Summary
This summary is machine-generated.

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Gelatin/plasma flask adherence best isolates human monocytes, yielding high purity and recovery for HIV research. This method minimizes contaminating CD4+ T cells, crucial for accurate studies.

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Accurate isolation of normal, nonactivated human monocytes is critical for immunological research, particularly for studying interactions with pathogens like HIV.
  • Various methods exist for monocyte isolation, but their efficiency, purity, and suitability for specific downstream applications like HIV binding assays vary.

Purpose of the Study:

  • To compare four different methods for isolating normal, nonactivated human monocytes from peripheral blood.
  • To evaluate the purity, recovery, and functional characteristics (e.g., HIV binding) of monocytes isolated by each method.

Main Methods:

  • Monocyte isolation using: 1) Sheep erythrocyte rosetting with AET followed by antibody/complement lysis, 2) Adherence to gelatin/plasma-coated flasks, 3) Adherence to plastic dishes, and 4) Sepracell technique.
  • Evaluation parameters included cell recovery, lymphocyte (CD4+ T cell) contamination, non-specific esterase activity, and reactivity with monocyte-specific monoclonal antibodies.

Related Experiment Videos

  • Assessment of monocyte binding capacity to human immunodeficiency virus (HIV).

    • Main Results:

    • Adherence to gelatin/plasma-coated flasks yielded the highest monocyte purity and cell recovery among the four methods.
    • This method also demonstrated satisfactory binding to HIV.
    • Monocyte isolation via gelatin/plasma adherence resulted in the lowest contamination by CD4+ T cells.

    Conclusions:

    • The adherence to gelatin/plasma-coated flasks is the most effective method for isolating high-purity, high-recovery human monocytes suitable for HIV binding studies.
    • This technique minimizes the presence of contaminating immune cells, ensuring more reliable experimental outcomes in immunological research.