An isoform of the Wilms' tumor suppressor gene potentiates granulocytic differentiation

D. M. Loeb, J. L. Summers, E. A. Burwell, D. Korz, Alan David Friedman, Saraswati Sukumar

Research output: Contribution to journalArticle

Abstract

WT1 is expressed in hematopoietic progenitor cells and in acute leukemia, but its role in normal and malignant hematopoiesis has not been clearly defined. Alternative splicing of the WT1 mRNA yields several protein isoforms with distinct DNA binding and transcriptional regulatory activities. In this study, we investigated the effect of the WT1 isoform lacking two alternatively spliced sequences (WT1 (-/-)) in 32D cl3 cells, a murine myeloid progenitor cell line. The expression of WT1 (-/-) accelerated the granulocyte-colony stimulating factor (G-CSF)-mediated differentiation of these cells, as judged by morphology and by the expression of differentiation-associated genes and cell surface antigens. WT1 (-/-) inhibited G1/S progression in G-CSF but not in interleukin-3, potentially accounting for its ability to accelerate differentiation. It is likely that dominant-negative mutants previously reported in leukemia patients participate in leukemogenesis by inhibiting this function of the wild-type protein.

Original languageEnglish (US)
Pages (from-to)965-971
Number of pages7
JournalLeukemia
Volume17
Issue number5
DOIs
StatePublished - May 1 2003

Fingerprint

Wilms' Tumor Genes
Granulocyte Colony-Stimulating Factor
Tumor Suppressor Genes
Protein Isoforms
Leukemia
Myeloid Progenitor Cells
Interleukin-3
Hematopoiesis
Alternative Splicing
Surface Antigens
Hematopoietic Stem Cells
Cell Differentiation
Cell Line
Messenger RNA
DNA
Genes
Proteins

Keywords

  • 32D
  • Differentiation
  • Hematopoiesis
  • Leukemogenesis
  • WT1

ASJC Scopus subject areas

  • Hematology
  • Cancer Research

Cite this

An isoform of the Wilms' tumor suppressor gene potentiates granulocytic differentiation. / Loeb, D. M.; Summers, J. L.; Burwell, E. A.; Korz, D.; Friedman, Alan David; Sukumar, Saraswati.

In: Leukemia, Vol. 17, No. 5, 01.05.2003, p. 965-971.

Research output: Contribution to journalArticle

Loeb, D. M. ; Summers, J. L. ; Burwell, E. A. ; Korz, D. ; Friedman, Alan David ; Sukumar, Saraswati. / An isoform of the Wilms' tumor suppressor gene potentiates granulocytic differentiation. In: Leukemia. 2003 ; Vol. 17, No. 5. pp. 965-971.
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