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Blood, 1 June 2001, Vol. 97, No. 11, pp. 3648-3650
BRIEF REPORT
Expression of nuclear transcription factor interferon consensus
sequence binding protein in chronic myeloid leukemia correlates with
pretreatment risk features and cytogenetic response to
interferon-
Manuel Schmidt,
Andreas Hochhaus,
Andreas Nitsche,
Rüdiger Hehlmann, and
Andreas Neubauer
From the Klinikum der Philipps-Universität
Marburg, Zentrum Innere Medizin, Abteilung
Hämatologie/Onkologie/Immunologie, Marburg, Germany; III.
Medizinische Universitätsklinik, Klinikum Mannheim der
Universität Heidelberg, Germany; and Klinik für Innere
Medizin m.S. Hamatologie und Onkologie, Charité-Campus Virchow
Klinikum, Humboldt Universität, Berlin, Germany.
Recently, it was shown that interferon consensus sequence binding
protein (ICSBP), a member of the interferon regulatory factor (IRF)
family, has a potential role in chronic myeloid leukemia (CML).
Deletion of ICSBP gene in mice leads to a CML-like syndrome and samples from CML patients exhibited impaired ICSBP expression. The
present study found that ICSBP expression correlated with risk features
determined by Sokal score in untreated CML (P = .007 for
high versus low risk). In addition, analyzing ICSBP expression during
interferon- (IFN- ) therapy in "good" (n = 27) versus "poor" (n = 15) cytogenetic responders, high ICSBP levels were only observed in "good" responders (P = .0002).
Together, these data suggest that ICSBP levels are related to initial
presentation of CML and the therapeutic response of CML to IFN- ,
indicating an important role of ICSBP in CML.

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