Abstract:
:Hypoxia inducible factor-1 (HIF-1) is a transcription factor composed of two subunits, HIF-1alpha and ARNT, which is activated under hypoxia. HIF-1alpha mRNA is expressed constitutively in a wide variety of cell types, whereas in some others HIF1A gene expression is upregulated by hypoxia. In this report, we show that in endothelial cells (HMEC-1) the HIF-1alpha mRNA expression level is the same in both normoxia and hypoxia. Deletion analysis experiments of the HIF1A promoter showed that in hypoxia HIF1A gene expression is upregulated through a short sequence located next to the transcription initiation site. We also show that in hypoxia another sequence located upstream from the +1 initiation site plays an inhibitory role on HIF1A transcription in HMEC-1 but not in hepatoma cells and brings back this expression level to that observed in normoxia. Finally, we demonstrate that HIF1A gene transcription is dependent on Sp1 binding sites and that the 5'UTR sequence also contains other important cis-acting elements.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Minet E,Ernest I,Michel G,Roland I,Remacle J,Raes M,Michiels Cdoi
10.1006/bbrc.1999.0995subject
Has Abstractpub_date
1999-08-02 00:00:00pages
534-40issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(99)90995-6journal_volume
261pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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doi:10.1016/j.bbrc.2007.11.107
更新日期:2008-02-01 00:00:00
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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doi:10.1016/j.bbrc.2006.07.067
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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doi:10.1016/j.bbrc.2014.06.035
更新日期:2014-07-18 00:00:00
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章,收录出版
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journal_title:Biochemical and biophysical research communications
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更新日期:2007-11-03 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
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doi:10.1016/j.bbrc.2008.11.033
更新日期:2009-01-09 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.02.002
更新日期:2012-03-16 00:00:00