Effects of Leukemia Inhibitory Factor (LIF) on Gene Transfer Efficiency into Murine Hematolymphoid Progenitors

  • Frederick A. Fletcher
  • Kateri A. Moore
  • Douglas E. Williams
  • Dirk Anderson
  • Charles Maliszewski
  • John W. Belmont
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 292)


We have investigated the effects of the cytokine leukemia inhibitory factor (LIF) on recovery and retroviral infection of murine hematopoietic stem cells maintained in short-term culture. Up to a two-fold increase in CFU-S13 recovery was observed, from 9.7 x 10-5 cells in untreated controls to 17.6 x 10-5 cells when lOU/ml LIF is added to the culture medium. Intermediate concentrations of LIF (.lU/ml and lU/ml) were not significantly different from the control. Histological analysis of spleen colonies harvested thirteen days posttransplant demonstrated that LIF does not cause a detectable alteration in the differentiative potential of CFU-S13. The efficiency of retroviral-vector infection in CFU-S13 is also improved, from 15% (24/158) in untreated controls to 91% (116/127) at a LIF concentration of l0U/ml. LIF concentrations of .lU/ml and lU/ml increased infection efficiency to 35% (14/40) and 71% (37/51), respectively. Analysis of proviral insertion sites in spleen colonies indicated that some CFU-S13 precursors were infected in the LIF-treated marrows, but no identical pairs were detected in the controls. Finally, long-term expression of provirally-encoded human adenosine deaminase (hADA) was measured in hematopoietic tissues of bone marrow transplant recipients six months posttransplant. In all tissues analyzed (spleen, thymus, bone marrow, splenic B cells, peritoneal macrophages, and blood) differentiated progeny of LIF-treated marrows had higher levels of hADA than untreated controls. Tenfold increases in levels of hADA are detected in some tissues, but levels were variable. These experiments demonstrate that LIF directly or indirectly enhances retroviral infection efficiency of hematopoietic stem cells, and might be used to improved existing gene transfer protocols.


Hematopoietic Stem Cell Leukemia Inhibitory Factor Infection Efficiency Hematopoietic Tissue Myeloid Leukemic Cell Line 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Frederick A. Fletcher
    • 2
  • Kateri A. Moore
    • 2
  • Douglas E. Williams
    • 3
  • Dirk Anderson
    • 3
  • Charles Maliszewski
    • 3
  • John W. Belmont
    • 1
    • 2
  1. 1.Howard Hughes Medical InstituteUSA
  2. 2.Institute for Molecular GeneticsBaylor College of MedicineHoustonUSA
  3. 3.Immunex Research and Development CorporationSeattleUSA

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