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Related Experiment Videos

Stem cell factor

I K McNiece1, R A Briddell

  • 1Department of Developmental Hematology, Amgen Inc., Thousand Oaks, California, USA.

Journal of Leukocyte Biology
|July 1, 1995
PubMed
Summary

Stem cell factor (SCF) enhances hematopoietic progenitor cell expansion and mobilization. Combining SCF with G-CSF significantly increases CD34+ cells in clinical studies, showing promise for cell therapy.

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Area of Science:

  • Hematology
  • Cell Biology
  • Immunology

Background:

  • Stem cell factor (SCF) is a key ligand for the c-kit receptor tyrosine kinase.
  • c-kit is expressed on primitive and mature hematopoietic progenitor cells.
  • SCF plays a crucial role in hematopoiesis across multiple lineages.

Purpose of the Study:

  • To evaluate the synergistic effects of SCF with other growth factors in vitro and in vivo.
  • To assess the clinical efficacy of SCF combined with G-CSF in enhancing progenitor cell mobilization.
  • To explore potential applications of SCF in cell expansion and gene therapy protocols.

Main Methods:

  • In vitro studies assessing SCF synergy with G-CSF, GM-CSF, and IL-3 on hematopoietic progenitor cell proliferation and differentiation.
  • In vivo studies evaluating SCF's role in growth factor-mediated progenitor cell mobilization.
  • Phase I/II clinical trials administering SCF and G-CSF to assess CD34+ cell increases.

Main Results:

  • In vitro, SCF synergizes with G-CSF, GM-CSF, and IL-3 to promote proliferation and differentiation of lymphoid, myeloid, erythroid, and megakaryocytic cells.
  • In vivo, SCF enhances progenitor cell mobilization when combined with G-CSF.
  • Phase I/II studies showed a 2- to 3-fold increase in CD34+ cells with SCF + G-CSF compared to G-CSF alone.

Conclusions:

  • SCF is a potent stimulator of hematopoiesis and progenitor cell mobilization.
  • The combination of SCF and G-CSF demonstrates significant clinical potential for increasing hematopoietic stem and progenitor cells.
  • SCF holds promise for ex vivo expansion and gene therapy applications.

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