Abstract
The effect of angiotensin II (Ang II) on the early growth response gene-1 (Egr-1) mRNA, on the Egr-1 protein and on the phosphoinositide PI turnover signalling system was investigated in the presence and absence of EXP3174, a potent non-peptide Ang II receptor antagonist. Ang II induced an accumulation of 3.4 kb Egr-1 mRNA and the 80 kDa Egr-1 protein, with a maximum at 30 min and 60 min, respectively. EXP3174 blocked the Ang II-induced increase of inositol phosphates, Egr-1 mRNA and the Egr-1 protein, suggesting the involvement of the PI signalling system by the expression of the Egr-1 gene.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Angiotensin II / pharmacology*
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Animals
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Cells, Cultured
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DNA-Binding Proteins / biosynthesis*
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DNA-Binding Proteins / genetics
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Early Growth Response Protein 1
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Female
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Immediate-Early Proteins*
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Muscle, Smooth, Vascular / drug effects
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Muscle, Smooth, Vascular / metabolism*
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Phosphatidylinositols / metabolism
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RNA, Messenger / analysis
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Rats
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Rats, Inbred WKY
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Transcription Factors / biosynthesis*
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Transcription Factors / genetics
Substances
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DNA-Binding Proteins
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Early Growth Response Protein 1
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Egr1 protein, rat
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Immediate-Early Proteins
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Phosphatidylinositols
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RNA, Messenger
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Transcription Factors
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Angiotensin II