Abstract:
:Human bone marrow cells express both a truncated and full-length form of the erythropoietin receptor (EpoR-T and EpoR-F, respectively). Transfection experiments using the murine interleukin (IL)-3-dependent cell line, Ba/F3, revealed that the cells coexpressing EpoR-F and EpoR-T (Ba/F3-FT) were more likely to undergo programmed cell death (apoptosis) than cells expressing EpoR-F (Ba/F3-FF), even in the presence of erythropoietin (Epo). When Ba/F3-FF cells were stimulated with Epo or IL-3, rapid induction of c-myc, c-fos, c-jun and junB genes was observed. A similar effect was also seen in IL-3 stimulated Ba/F3-Ft cells. However, in Ba/F3-FT cells expression of the c-jun gene was not induced by Epo stimulation. Administration of Epo could prevent apoptosis induced by IL-3 deprivation in Ba/F3-FT cells expressing ectopic c-Jun protein. These results indicate that induction of c-Jun through the Epo signaling pathway has an important role in the inhibition of apoptosis.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Shimizu R,Komatsu N,Nakamura Y,Nakauchi H,Nakabeppu Y,Miura Ydoi
10.1006/bbrc.1996.0688subject
Has Abstractpub_date
1996-05-06 00:00:00pages
1-6issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(96)90688-9journal_volume
222pub_type
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