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- W1995736456 abstract "Neuronal cells in primary culture from the hypothalamus-brain stem areas of normotensive [Wistar-Kyoto (WKY)] and spontaneously hypertensive (SH) rat brains have been used in the present study to investigate an interaction between the brain renin-angiotensin II system and the plasminogen activator system. This is an attempt to further our understanding of the role of brain Ang II in the control of neuronal development and differentiation through its regulation of the extracellular matrix. Ang II caused a 10-fold stimulation of plasminogen activator inhibitor-1 (PAI-1) messenger RNA (mRNA) in WKY rat brain neuronal cultures. The stimulation was mediated by the AT1 receptor subtype and was accompanied by an increase in PAI-1 gene transcription and the synthesis of cellular PAI-1 protein. The stimulation involved activation of protein kinase C, and alterations in the intracellular Ca2+ pool caused a significant inhibition of Ang II stimulation of PAI mRNA. Ang II stimulation of PAI-1 mRNA succeeded its action on c-fos mRNA and was attenuated by c-fos antisense oligonucleotide. Although PAI-1 gene expression was also stimulated by Ang II in neuronal cultures of SH rat brain, two differences between WKY and SH rat brain neurons were observed: 1) the level of Ang II stimulation in SH rat neurons was 50% of that in WKY rat neurons; and 2) Ang II stimulation of c-fos was 2.4-fold higher in SH neurons than in WKY neurons, but c-fos antisense oligonucleotide did not attenuate the stimulatory action of Ang II on PAI-1 mRNA in SH neurons. These observations suggest that the changes in the Ang II-mediated signaling pathways and/or the regulatory region(s) of the PAI-1 gene may contribute to the differential actions of Ang II in WKY and SH rat brain neurons." @default.
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- W1995736456 date "1996-06-01" @default.
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- W1995736456 title "Angiotensin II regulation of plasminogen activator inhibitor-1 gene expression in neurons of normotensive and spontaneously hypertensive rat brains." @default.
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- W1995736456 doi "https://doi.org/10.1210/endo.137.6.8641204" @default.
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