Abstract:
STUDY OBJECTIVE:The aim was to evaluate the influence that centrally administered angiotensin-II has on the intrarenal renin-angiotensin system and renal sympathetic nerve activity. DESIGN:Renal responses to centrally administered angiotensin-II (10 micrograms) or saralasin (50 micrograms) were measured in anaesthetised rats. The right kidney was vascularly isolated (but neurally intact) and perfused with artificial plasma at either a constant pressure (13.3 kPa) or constant flow (600 microliters.min-1) and renal vascular resistance was measured. Renal perfusate was collected at 10 min intervals after central administration of peptides and intrarenal concentrations of noradrenaline and renin were determined. SUBJECTS:Adult female Sprague-Dawley rats (200-225 g) were used. Rats were given thermal (or sham) lesions of the medial basal forebrain (MBF) 24 h prior to renal perfusion studies. RESULTS:Sham lesioned animals: central administration of angiotensin-II caused an increase in renal vascular resistance and intrarenal noradrenaline concentration in both the constant pressure and constant flow renal perfusion models. Central administration of angiotensin-II increased intrarenal renin concentration in the constant pressure model, while it decreased intrarenal renin concentration in the constant flow model. These effects of intracerebroventricular angiotensin-II were blocked by the concomitant administration of saralasin. Saralasin had no agonist actions on the responses measured. Medial basal forebrain lesioned animals: baseline levels of intrarenal noradrenaline concentration in both the constant flow and constant pressure perfusion models were significantly reduced compared to sham lesioned rats. Baseline intrarenal renin concentration was increased relative to sham lesioned rats in the constant flow perfusion model, but decreased relative to sham lesioned rats in the constant pressure perfusion model. Lesions of the medial basal forebrain block responses to intracerebroventricular angiotensin-II in both models. CONCLUSIONS:Angiotensin-II appears to act on neurones within the medial basal forebrain to increase renal sympathetic nerve activity. Renal nerve activity interacts with the prevailing intrarenal pressure to modulate the release of renin.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Weekley LBdoi
10.1093/cvr/25.5.353subject
Has Abstractpub_date
1991-05-01 00:00:00pages
353-63issue
5eissn
0008-6363issn
1755-3245journal_volume
25pub_type
杂志文章abstract::Myocardial lactate content and simultaneous evolution of a lactate arteriovenous gradient associated with incomplete obstruction of the left coronary bed were studied in dog hearts. Samples of blood were taken from a peripheral artery and the coronary sinus; transmural samples of myocardial tissue were obtained from t...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/16.10.552
更新日期:1982-10-01 00:00:00
abstract:OBJECTIVE:The aim of this work was to compare the effects of supplementation of rat chow diet with potassium (K+) and whey mineral concentrate (Whey), a diet rich in milk minerals, on blood pressure and arterial responses in vitro in spontaneously hypertensive rats (SHR). METHODS:Thirty young SHR and twenty Wistar-Kyo...
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journal_title:Cardiovascular research
pub_type: 临床试验,杂志文章
doi:10.1093/cvr/27.8.1477
更新日期:1993-08-01 00:00:00
abstract:OBJECTIVES:The A10 cell line was derived from the thoracic aorta of embryonic rat and is a commonly used model of vascular smooth muscle cells (VSMC). Despite its wide use this cell line has not been well characterized. This is especially important in light of recent evidence of phenotypically distinct cell populations...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(97)00156-9
更新日期:1997-10-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
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更新日期:1995-11-01 00:00:00
abstract::Excessive feeding is associated with an increase in the incidence of chronic metabolic diseases, such as obesity, insulin resistance, and type 2 diabetes. Metabolic disturbance induces chronic low-grade inflammation in metabolically-important organs, such as the liver and adipose tissue. Many of the inflammatory signa...
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doi:10.1093/cvr/cvx012
更新日期:2017-03-15 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/17.8.476
更新日期:1983-08-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(96)00167-8
更新日期:1996-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00119-9
更新日期:1998-10-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvv166
更新日期:2015-07-15 00:00:00
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pub_type: 杂志文章
doi:10.1016/s0008-6363(00)00311-4
更新日期:2001-03-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/cvr/27.8.1542
更新日期:1993-08-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/28.12.1863
更新日期:1994-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvt074
更新日期:2013-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/cvr/22.11.793
更新日期:1988-11-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2003.10.009
更新日期:2004-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/cvr/cvw076
更新日期:2016-06-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00239-9
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pub_type: 杂志文章
doi:10.1093/cvr/9.6.707
更新日期:1975-11-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/cvr/20.5.379
更新日期:1986-05-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
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更新日期:1996-02-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
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更新日期:2020-07-15 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(99)00156-x
更新日期:1999-10-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(02)00729-0
更新日期:2003-03-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvp032
更新日期:2009-07-15 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/27.2.279
更新日期:1993-02-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvp280
更新日期:2010-01-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(03)00457-7
更新日期:2003-09-01 00:00:00
abstract:OBJECTIVE:Myocardial contractility is enhanced in transgenic (TG) mice with cardiac-restricted overexpression of the alpha1A-adrenergic receptors (alpha1A-AR). We tested the hypothesis that this enhanced inotropy protects against dysfunction and remodeling after myocardial infarction (MI). METHODS:We subjected alpha1A...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2006.06.015
更新日期:2006-09-01 00:00:00