Autocrine transformation of hemopoietic cells resulting from cytokine message stabilization after intracisternal A particle transposition

Oncogene. 1993 May;8(5):1221-32.


Cell lines that no longer require exogenous interleukin 3 (IL-3) for growth were isolated from an IL-3-dependent cell line that possesses characteristics of early lymphoid cells. Unlike the parental cells (FL5.12), these autocrine transformed lines (FL-IL3-R) constitutively secreted IL-3, were rearranged at the IL-3 locus and formed tumors upon injection into syngeneic mice. The rearrangement and IL-3 expression resulted from the transposition of an intracisternal A particle (IAP) provirus into the 3' untranslated region of the IL-3 gene. This region contained ATTTA sequence motifs that have been associated with cytokine and oncogene mRNA instability. IL-3 transcripts from the autocrine transformed cell lines had a longer half-life than similar transcripts isolated from either phorbol ester-stimulated T cells or the WEHI-3B myelomonocytic cell line. IAP proviral transposition did not alter the transcription rate of the IL-3 gene in FL-IL3-R cells. Therefore, IAP proviral transposition can activate IL-3 gene expression by prolonging mRNA stability, and this mechanism can contribute to the autocrine transformation of the hemopoietic cells.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Base Sequence
  • Cell Line, Transformed
  • Cell Transformation, Neoplastic*
  • Chromosome Mapping
  • Gene Expression
  • Gene Rearrangement
  • Genes, Intracisternal A-Particle*
  • Hematopoiesis
  • Interleukin-3 / genetics*
  • Mice
  • Molecular Sequence Data
  • Proviruses / genetics*
  • Recombination, Genetic*
  • Repetitive Sequences, Nucleic Acid
  • Transcription, Genetic


  • Interleukin-3

Associated data

  • GENBANK/M99279