B cell growth is controlled by phosphatidylinosotol 3-kinase-dependent Rel/NF-kappa B regulated induction of c-myc transcription
Details
Publication Year 2002-12,Volume 10,Issue #6,Page 1283-1294
Journal Title
MOLECULAR CELL
Publication Type
Journal Article
Abstract
Rel/NF-kappaB transcription factors regulate the division and survival of B lymphocytes. Here we show that B cells lacking NF-kappaB1 and c-Rel fail to increase in size upon mitogenic stimulation due to a reduction in induced c-myc expression. Mitogen-induced B cell growth, although not markedly impaired by FRAP/mTOR or MEK inhibitors, required phosphatidylinositol 3-kinase (PI3K) activity. Inhibition of PI3K-dependent growth coincided with a block in the nuclear import of NF-kappaB1/c-Rel dimers and a failure to upregulate c-myc. In addition, PI3K was shown to be necessary for a transcription-independent increase in c-Myc protein levels that accompanies mitogenic activation. Collectively, these findings establish a role for Rel/NF-kappaB signaling in the mitogen-induced growth of mammalian cells, which in B lymphocytes requires a PI3K/c-myc-dependent pathway.
Publisher
CELL PRESS
Keywords
TRANSGENIC MICE; SIZE; ONCOGENE; EXPRESSION; APOPTOSIS; RESPONSES; PATHWAY; ANTIGEN; SUBUNIT; DEFECTS
Terms of Use/Rights Notice
Refer to copyright notice on published article.


Creation Date: 2002-12-01 12:00:00
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