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1996-03-09
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Document 0071
DOCN M9650071
TI The Gag-Myb-Ets fusion oncogene alters the apoptotic response and growth
factor dependence of interleukin-3 dependent murine cells.
DT 9605
AU Athanasiou M; Mavrothalassitis GJ; Yuan CC; Blair DG; Laboratory of
Cellular Biochemistry, SAIC Frederick, Maryland,; USA.
SO Oncogene. 1996 Jan 18;12(2):337-44. Unique Identifier : AIDSLINE
MED/96152899
AB Expression of the avian E26-derived Gag-Myb-Ets fusion oncogene in
interleukin-3(IL3)-dependent murine hematopoietic cell lines results in
a pattern of cell line dependent changes in growth factor-induced
proliferation and apoptosis. A drug-selectable retrovirus expressing
p135Gag-Myb-Ets induced an erythropoietin(Epo)-responsive phenotype in
the cell lines FDC-P2, BaF3 and 32Dc123. Gag-Myb-Ets expression alone
did not increase expression of GATA-1 or the Epo receptor(EpoR) in the
presence of IL3, and infected cell lines express increased GATA-1 and
EpoR only when IL3 was replaced by Epo in the culture media. Indicative
of Epo-induced erythroid differentiation, these cells also began to
express beta-globin after 3-5 days growth in Epo. Unlike control cells,
infected FDC-P2 cells failed to undergo programmed cell death
(apoptosis) when transferred from IL3- to Epo-containing media, although
a fraction of the cells failed to proliferate following the media shift.
Three other IL3-dependent cell lines showed no changes in growth
behavior when induced to express the fusion oncogene. Our data shows
that Gag-Myb-Ets can have different affects on growth factor pathways
depending on the cell background, suggesting a model in which the
p135gag-myb-ets fusion oncogene promotes these different responses
through its affect on apoptosis.
DE Animal *Apoptosis Base Sequence Cell Line Cloning, Molecular
Erythropoietin/PHARMACOLOGY Gene Products, gag/*GENETICS
Interleukin-3/*PHARMACOLOGY Mice Molecular Sequence Data *Oncogenes
Proto-Oncogene Proteins/*GENETICS Transcription Factors/*GENETICS 3T3
Cells JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).