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Related Experiment Videos

Autologous peripheral blood stem cells: collection and processing

M Hansson1, A Svensson, P Engervall

  • 1Immunhemotherapy unit, Karolinska Hospital, Stockholm, Sweden.

Medical Oncology (Northwood, London, England)
|June 1, 1996
PubMed
Summary
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Collecting autologous peripheral blood stem cells (PBSC) is crucial for cancer therapy. Previous chemotherapy can hinder PBSC collection, impacting patient recovery and treatment success.

Area of Science:

  • Hematology
  • Oncology
  • Cellular Therapy

Background:

  • Autologous peripheral blood stem cell (PBSC) collection and processing are rapidly advancing.
  • Increasing patient numbers are treated with PBSC, leading to a growing body of literature.
  • Previous stem cell-toxic chemotherapy is a significant factor negatively influencing PBSC mobilization.

Purpose of the Study:

  • To weigh the need for adequate anti-tumor therapy against the risk of stem cell toxicity impacting PBSC collection.
  • To address challenges in defining optimal CD34+ cell counts for sufficient PBSC-autografting due to non-standardized enumeration methods.
  • To explore factors affecting hematological recovery time, including infused CD34+ cell dose and prior chemotherapy impact.

Main Methods:

  • Review of clinical experience and existing literature on PBSC mobilization and collection.

Related Experiment Videos

  • Discussion of consensus on target CD34+ cell doses for autografting.
  • Exploration of recent advancements in in vitro purging and selection of CD34+ cells.

    • Main Results:

    • Previous chemotherapy is a key variable negatively affecting PBSC mobilization and collection success.
    • Standardization of CD34+ cell enumeration methods is lacking, hindering the establishment of optimal graft levels.
    • Hematological recovery is influenced by both the infused CD34+ cell dose and the extent of prior chemotherapy.
    • The presence of malignant cells in PBSC grafts is a concern, though its clinical significance is not fully established.
    • In vitro purging and selection methods offer potential to reduce reinfusion of malignant cells.

    Conclusions:

    • Balancing anti-tumor therapy with the risk of stem cell toxicity is critical for patient selection in autologous PBSC support.
    • Future research should focus on distinguishing stem cells from progenitor cells within PBSC collections to optimize engraftment and long-term hematopoiesis.