Enhanced p73 expression during differentiation and complex p73 isoforms in myeloid leukemia

Mario P. Tschan, Tobias J. Grob, Uwe R. Peters, Vincenzo De Laurenzi, B. Huegli, K. A. Kreuzer, C. A. Schmidt, Gerry Melino, Martin F. Fey, Andreas Tobler, Jean François Cajot

Research output: Contribution to journalArticlepeer-review


The p53 homologue p73 is expressed in at least six different isoforms (α, β, γ, δ, ε, and ζ), but unlike p53 it has rarely been found mutated in human cancers. However, altered expression of this gene has been reported in cancer cells. In order to understand if p73 is involved in normal and malignant development of myeloid cells, we investigated the expression pattern of the different p73 isoforms in progenitor and mature normal myeloid cells as well as in cells derived from acute and chronic myeloid leukemias. The results show that expression of p73 is markedly enhanced during differentiation of myeloid leukemic cells and that leukemic blasts from patients show an increased expression of the shorter p73 isoforms (γ, δ, ε, ζ). In particular the ε isoform is only expressed in leukemic cells and completely absent in mature myeloid cells. Altogether our data suggest that p73 is involved in myeloid differentiation and its altered expression is involved in leukemic degeneration. (C) 2000 Academic Press.

Original languageEnglish
Pages (from-to)62-65
Number of pages4
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - Oct 14 2000


  • AML
  • CML
  • Leukemia
  • Myeloid differentiation
  • P73

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology


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