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K Heidorn, H Kreipe, HJ Radzun, R Muller and MR Parwaresch
Total cellular RNA of highly purified normal human blood cell populations
was analyzed for the expression of the protooncogene c-fos, the cellular
counterpart of the transforming FBJ virus. In marked contrast to previous
findings based on in vitro studies with permanent leukemic cell lines,
c-fos transcription was restricted to granulocytes. Neither blood monocytes
nor blood lymphocytes or alveolar macrophages revealed detectable levels of
c-fos transcription. Whereas this cellular oncogene is constitutively
expressed in granulocytes, the monocytic cell line U-937 showed a transient
c-fos transcription only after induction of differentiation. The
contradiction between the results found in vivo and in vitro is discussed.
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| Copyright © 1987 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||