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Related Experiment Videos

Stem cell mobilization.

Michele H Cottler-Fox1, Tsvee Lapidot, Isabelle Petit

  • 1Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR 77205, USA.

Hematology. American Society of Hematology. Education Program
|November 25, 2003
PubMed
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Successful blood and marrow transplants (BMT) depend on adequate hematopoietic progenitor/stem cells (HPCs). Mobilization strategies, using factors like CD34 cell counts, are crucial for effective stem cell collection and transplant outcomes.

Area of Science:

  • Hematology
  • Transplant Immunology
  • Cellular Therapy

Background:

  • Successful blood and marrow transplant (BMT) relies on infusing sufficient hematopoietic progenitor/stem cells (HPCs) for marrow engraftment.
  • The CD34 cell surface marker, identified by flow cytometry, is the primary clinical surrogate for HPCs.
  • Mobilization is the process of recruiting HPCs from the marrow into the blood for collection.

Purpose of the Study:

  • To review factors influencing stem cell mobilization.
  • To discuss strategies for mobilizing HPCs in older myeloma patients and improving apheresis collection.
  • To present clinical data on mobilizing allogeneic donors and the impact of graft composition.

Main Methods:

  • Review of factors influencing stem cell mobilization, including chemokines, enzymes, adhesion molecules, cytokines, and cell interactions.

Related Experiment Videos

  • Analysis of clinical approaches for mobilizing older myeloma patients, optimizing apheresis timing and volume, and enumerating CD34+ cells.
  • Evaluation of clinical results using G-CSF, GM-CSF, and their combination for allogeneic donor mobilization, assessing cell yield and graft composition.

    • Main Results:

    • New mobilization approaches based on current understanding are undergoing clinical testing.
    • Individualized apheresis timing and adjusted blood processing volumes can improve collection efficiency.
    • Mobilization with G-CSF and GM-CSF yields specific cell numbers and types, influencing immune reconstitution and GVHD.

    Conclusions:

    • Understanding stem cell mobilization factors is key to developing new clinical strategies.
    • Optimizing mobilization and collection techniques improves the success of autologous and allogeneic BMT.
    • Graft composition significantly impacts post-transplant immune recovery and graft-versus-host disease (GVHD).