Insulin-Like Growth Factor Type I (IGF-I) Supports Growth of V-relER Dendritic Cell Progenitors

  • Jaime Madruga
  • Nicolás Koritschoner
  • Gabi Stengl
  • Signe Knespel
  • Petr Bartunek
  • Martin Zenke
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 417)


Over the past few years, several protocols have been established to differentiate antigen-presenting dendritic cells (DC) from DC progenitors grown in vitro (1–4, see also review of Peters et al., 5). While these procedures yield fully competent DC in large numbers, there is also some heterogenity in the cultures obtained since the cell populations are not clonal. Several DC lines were also established (6–10) which however in most instances recapitulate only part of the DC specific phenotype. Recently we have developed an in vitro differentiation system for DC which is based on the conditional hormone-inducible V-relER oncogene (11, 12). V-rel represents a retrovirus-transduced version of crel and is a member of the NF-kB/rel transcription factor family. In the chimeric V-relER gene, V-rel is fused to the hormone-binding domain of the human estrogen receptor, thus making the transforming capacity of V-rel hormone-inducible. Accordingly V-relER is capable of transforming chicken bone marrow cells in the presence of estrogen while it is inactive in the absence of hormone. Most importantly, V-relER transformed bone marrow cells can be grown as clonal homogenous cell populations to large cell numbers and induced to differentiate into DC after experimentally “switching off’ V-relER activity by removing estrogen or by adding the estrogen antagonist ICI 164,384 (12, Fig. 1).


Dendritic Cell IGFR Expression Human Estrogen Receptor Dendritic Cell Line Dendritic Cell Progenitor 
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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Jaime Madruga
    • 1
  • Nicolás Koritschoner
    • 1
  • Gabi Stengl
    • 1
  • Signe Knespel
    • 1
  • Petr Bartunek
    • 1
  • Martin Zenke
    • 1
  1. 1.Max-Delbrück-Center for Molecular MedicineMDCBerlinGermany

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