Abstract:
:WAF1 inhibits cyclin-cyclin dependent kinase complexes, causing arrest in the cell cycle. We report that interleukin-1 (IL-1) regulates the levels of WAF1 protein and mRNA in human fibroblasts. Further studies showed that 12-O-tetradecanoyl phorbol 13-acetate (TPA) enhanced the accumulation of WAF1; cells refractory to TPA still increased their levels of WAF1 mRNA when exposed to IL-1. IL-1 also increased transcription of WAF1 by 13-fold and WAF1 mRNA became 2-fold more stable in cells stimulated with IL-1 (t1/2 = 2 h) as compared to untreated cells (t1/2 = 1 h). In summary, IL-1 induces expression of WAF1, and this occurs by increased transcription of WAF1 and stabilization of WAF1 mRNA. Our data also indicate that the induction of WAF1 mRNA by IL-1 occurs through a pathway independent of protein kinase C activation.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Osawa Y,Hachiya M,Koeffler HP,Suzuki G,Akashi Mdoi
10.1006/bbrc.1995.2641subject
Has Abstractpub_date
1995-11-13 00:00:00pages
429-37issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(85)72641-1journal_volume
216pub_type
杂志文章abstract::The present study was undertaken to evaluate the functional significance of the previously observed increase in the level of IGF-II receptors despite the loss of growth promoting activity of IGF-II in differentiated limb buds in organ culture. In the present study IGF-II and insulin at similar concentration (0.1-1 mic...
journal_title:Biochemical and biophysical research communications
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