Journal ArticleDOI
Renal Neurogenic Mediation of Intracerebroventricular Angiotensin II Hypertension in Rats Raised on High Sodium Chloride Diet
TLDR
Elevated postnatal NaCl intake enhances the pressor sensitivity of the brain to Ang II, which is dependent on intact renal nerves, and increases the hypertensive response to low-dose I.C.V.Abstract:
Chronic elevation of sodium intake may affect the sensitivity of the central nervous system to intracerebroventricular (ICV) angiotensin II (Ang II) infusion. Experiments were conducted to determine the influence of raising Sprague-Dawley rats from 2 to 3 weeks of age on low (5.0 mmol/L per kg food), normal (50 mmol/L per kg food), or high (250 mmol/L per kg food) NaCl diets on renal and cardiovascular responses to low-dose ICV Ang II infusion. At 12 weeks of age, Sprague-Dawley rats were instrumented for chronic study, including brain lateral ventricular cannulation. Artificial cerebrospinal fluid was infused (0.25 μL/min ICV) during control and recovery, whereas Ang II (20 ng/min) was infused for 5 days. During the experiment, respective sodium intakes were infused intravenously over 24 hours. In rats fed high sodium, control mean arterial pressure was 115±2 mm Hg and increased to 132±4 mm Hg by day 5 of ICV Ang II infusion. This increase in arterial pressure was associated with significant ( P <.05) decreases in sodium excretion, leading to the retention of 5.4±0.6 mmol/L total sodium over the 5 days of Ang II infusion. In rats raised on low and normal sodium intakes from weaning and in 10-week-old rats exposed to a high sodium diet for only 2 weeks, arterial pressure was not increased and sodium was not retained during ICV Ang II infusion at 20 ng/min. In rats raised on the high sodium diet, bilateral renal denervation abolished the arterial hypertension and reduced the sodium retention over 5 days of ICV Ang II infusion. Thus, chronic elevation of sodium intake increases the hypertensive response to low-dose ICV Ang II infusion, which is dependent on intact renal nerves. We conclude that elevated postnatal NaCl intake enhances the pressor sensitivity of the brain to Ang II.read more
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Book
Neural Control Of Renal Function
Gerald F. DiBona,Ulla C. Kopp +1 more
TL;DR: The renal nerve is the communication link between the central nervous system and the kidney as discussed by the authors, which is the major structural and functional components of the kidney, the vessels, glomeruli, and tubules, each of which is innervated.
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Neural control of renal function.
TL;DR: The renorenal reflex coordinates the excretory function of the two kidneys so as to facilitate homeostatic regulation of sodium and water balance and proof of principle studies in essential hypertensive patients demonstrate that renal denervation produces sustained decreases in arterial pressure.
Journal ArticleDOI
A Modern Understanding of the Traditional and Nontraditional Biological Functions of Angiotensin-Converting Enzyme
Kenneth E. Bernstein,Frank S Ong,Wendell-Lamar B. Blackwell,Kandarp H. Shah,Jorge F. Giani,Romer A. Gonzalez-Villalobos,Xiao Z. Shen,Sebastien Fuchs +7 more
TL;DR: Knowing the structural differences between the two ACE domains should allow clinicians to envision new therapies for diseases not currently treated with ACE inhibitors, and these reagents will undoubtedly be powerful tools for probing the physiologic actions of each ACE domain.
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Prenatal Dexamethasone Causes Oligonephronia, Sodium Retention, and Higher Blood Pressure in the Offspring
Gianni Celsi,Anna Kistner,Roman Idelevich Aizman,Ann-Christine Eklöf,Sandra Ceccatelli,Angelina De Santiago,Stefan H. Jacobson +6 more
TL;DR: It is found that high levels of maternal glucocorticoids impair renal development and lead to arterial hypertension in offspring, and even though renal mass eventually normalizes, glomerular damage as well as sodium retention occur and these factors may contribute to the development of hypertension.
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The Hypothalamus and Hypertension
TL;DR: Most forms of hypertension are associated with a wide variety of functional changes in the hypothalamus, and Alterations in the following substances are discussed: catecholamines, acetylcholine, angiot...
References
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Journal ArticleDOI
The Sustained Antihypertensive Effect of Chronic Cerebroventricular Infusion of Angiotensin Antagonist in Spontaneously Hypertensive Rats
TL;DR: The data suggest that the brain isorenin system participates in the maintenance of hypertension in the spontaneously hypertensive rat, and the angiotensin antagonist at comparable doses failed to alter blood pressure in any significant fashion.