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Related Experiment Videos

Sequential CD34+ and CD4+ cell selection from leukapheresis components

I J Webb1, M Beach, J F Daley

  • 1Cell Manipulation and Gene Transfer Laboratories, Harvard Medical School, Boston, MA 02115, USA.

Journal of Hematotherapy
|May 23, 1998
PubMed
Summary
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Sequential cell selection successfully isolated high-purity CD34+ and CD4+ cell fractions from leukapheresis. This method streamlines donor procedures for stem cell transplantation and lymphocyte infusions.

Area of Science:

  • Hematology
  • Immunology
  • Cell Biology

Background:

  • Leukapheresis is a critical source of hematopoietic stem cells and immune cells for transplantation.
  • Current methods may require multiple donor collections for distinct cell populations.
  • Graft-versus-host disease is a significant complication in allogeneic transplantation.

Purpose of the Study:

  • To evaluate the feasibility of sequentially isolating CD34+ and CD4+ cell-enriched fractions from single leukapheresis components.
  • To assess the purity of the isolated cell populations.
  • To determine the potential impact on donor procedures and therapeutic applications.

Main Methods:

  • Utilized the CellPro CEPRATE LC system for sequential cell selection.
  • Isolated CD34+ cells from mononuclear cells.

Related Experiment Videos

  • Performed secondary selection for CD4+ cells from the CD34-depleted fraction.
  • Analyzed cell purities of enriched fractions.

    • Main Results:

    • Achieved median purities of 90.5% for CD34+ cells and 86.0% for CD4+ cells.
    • Demonstrated successful sequential isolation from autologous leukapheresis components.
    • Observed depletion of CD8+ lymphocytes during both selection processes.

    Conclusions:

    • High-purity CD34+ and CD4+ cell fractions can be sequentially isolated from leukapheresis products.
    • This approach may reduce the number of donor procedures needed.
    • Enables provision of separate cell populations for allogeneic transplantation and donor lymphocyte infusions from a single collection.