Changes of plasma renin activity following intracerebroventricular administration of biologically active peptides in two-kidney, one clip hypertensive rats.
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概要
- 論文の詳細を見る
We studied the effects of intracerebroventricular (ICV) administration of angiotensin II (ANG II), bradykinin (BK), leucineenkephalin (Leu-ENK) and neurotensin (NT) on plasma renin activity (PRA), blood pressure and heart rate in acute (less than 4 weeks) and chronic (more than 12 weeks) two-kidney, one clip (2K-1C) hypertensive rats. These four peptides all produced pressor responses. The pressor responses caused by ICV injection of ANG II, BK, Leu-ENK and NT in hypertensive rats did not differ significantly from the response in normal rats. In both acute and chronic 2K-1C hypertensive rats, ANG II and BK significantly suppressed PRA, NT did not affect PRA, and Leu-ENK produced a significant increase in PRA followed by a significant decrease in PRA. As compared to normal rats, suppression of PRA by ANG II and NT was attenuated or abolished but BK and Leu-ENK produced significant reductions in PRA in 2K-1C hypertensive rats. The results indicate that the effects of these four centrally administered peptides on blood pressure, heart rate and PRA in acute and chronic 2K-1C hypertensive rats were not essentially different from those in normal rats.
- International Heart Journal刊行会の論文
著者
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Hiwada Kunio
Second Department Of Internal Medicine Ehime University School Of Medicine
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Kokubu Tatsuo
Second Department Of Internal Medicine Ehime University
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KOKUBU Tatsuo
Second Department of Internal Medicine, Ehime University School of Medicine
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IWATA Takeru
Second Department of Internal Medicine, Ehime University School of Medicine
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