Rat stem cell factor and IL-6 preferentially support the proliferation of c-kit-positive murine hemopoietic cells rather than their differentiation

N. Miura, S. Okada, K. M. Zsebo, Y. Miura, T. Suda

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We have investigated the effect of stem cell factor (SCF) alone and in combination with interleukin-3 (IL-3) or interleukin-6 (IL-6) on the proliferation and maintenance of primitive hemopoietic progenitor cells. Results from liquid preculture of either unfractionated bone marrow cells or lineage (Lin)-c-kit+ cells indicates that the combination of SCF + IL-3 results in the greatest expansion of total nucleated cell numbers; however, the combination of SCF + IL-6 results in the greatest expansion of colony- forming cells in culture (CFU-C) and in spleen (CFU-S). Morphologic examination confirmed the increase in immature cells after culture with SCF + IL-6 and, therefore, this combination is deemed superior for the expansion of primitive cells in liquid culture. Reconstitution assays using congenic mice (Ly5) revealed that cultured cells in the presence of SCF + IL-6 contained stem cells that were capable of reconstituting the hemopoiesis in lethally irradiated mice. Although it remains unclear whether SCF + IL-6 directly supports the self-renewal of stem cells, SCF + IL-6 is a powerful tool for manipulating primitive hemopoietic cells in vitro.

Original languageEnglish
Pages (from-to)143-149
Number of pages7
JournalExperimental Hematology
Issue number1
Publication statusPublished - 1993 Dec 1



  • IL-6
  • SCF
  • c-kit
  • cells

ASJC Scopus subject areas

  • Molecular Biology
  • Hematology
  • Genetics
  • Cell Biology
  • Cancer Research

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