scholarly journals Renin and Aldosterone Secretion in Man as Influenced by Changes in Electrolyte Balance and Blood Volume

1970 ◽  
Vol 27 (6) ◽  
pp. 953-960 ◽  
Author(s):  
MARCIA B. BULL ◽  
ROBERT S. HILLMAN ◽  
PAUL J. CANNON ◽  
JOHN H. LARAGH
JAMA ◽  
1960 ◽  
Vol 174 (15) ◽  
pp. 1941
Author(s):  
Arlie R. Mansberger

2002 ◽  
Vol 283 (4) ◽  
pp. R832-R836 ◽  
Author(s):  
Giuliano Neri ◽  
Sergio Bova ◽  
Ludwik K. Malendowicz ◽  
Giuseppina Mazzocchi ◽  
Gastone G. Nussdorfer

The prolonged exposure to microgravity (MG) or simulated MG (SMG) has been reported to cause hypotension, mainly due to reduced vascular contractility, and dysregulation of fluid and electrolyte balance. However, the mechanism(s) involved in these MG- or SMG-induced effects is not yet completely elucidated. Hence, we investigated in the rat the effect of prolonged (15 day) SMG, in the form of hindlimb unweighting, on the renin-angiotensin-aldosterone system (RAAS), as well as on atrial natriuretic peptide (ANP) and adrenomedullin (ADM), two hypotensive peptides that play a major role in the regulation of RAAS activity by inhibiting adrenal aldosterone secretion. SMG caused a mild hypotension in rats, associated with the blockade of body weight gain. Plasma aldosterone concentration and basal and agonist-stimulated in vitro aldosterone secretion from adrenal slices were decreased, and plasma renin activity was moderately increased. Neither Na+ and K+ serum concentrations nor ACTH and corticosterone blood levels were significantly affected. Plasma ANP concentration did not display significant alterations, while ADM blood concentration underwent a marked rise. The administration of the ADM-receptor antagonist ADM-(22–52) during the last 3 days of hindlimb unweighting reversed the SMG-induced hypotension and hypoaldosteronism. Collectively, these findings allow us to suggest that prolonged SMG impairs RAAS activity in rats, through a mechanism probably involving upregulation of the ADM system. Both hypoaldosteronism and increased ADM secretion may contribute to the development of hypotension during prolonged exposure to SMG.


Physiology ◽  
1986 ◽  
Vol 1 (2) ◽  
pp. 67-69 ◽  
Author(s):  
JG Douglas

Angiotensin affects cardiovascular function through contraction of vascular smooth muscle and stimulation of aldosterone secretion, responses that are modulated by alterations in sodium or potassium balance. Changes in angiotensin receptor density of the target tissues are the major determinant of tissue responsiveness during alterations in electrolyte balance.


PEDIATRICS ◽  
1968 ◽  
Vol 41 (5) ◽  
pp. 871-872
Author(s):  
Alfred M. Bongiovanni

A Relationship between the kidney and hypertension has been recognized for centuries. For the past three decades various manipulations of the kidney, beginning with the "Goldblatt kidney," have been known to produce hypertension. Thus, it has long been suspected that some humoral factor originating in renal tissue was involved. There is now evidence that this renal factor is renin and it appears to originate in the juxtaglomerular apparatus. The exact mode of its release is not entirely clear, but it seems probable that subtle changes in blood volume or perhaps blood viscosity play a role. Hormonal control has not been ruled out. It is known that sodium depletion leads to increased release of renin.


Metabolism ◽  
1964 ◽  
Vol 13 (3) ◽  
pp. 212-220 ◽  
Author(s):  
Mohinder P. Sambhi ◽  
Eleanor H. Venning ◽  
John C. Beck

2020 ◽  
pp. 306-308
Author(s):  
V.I. Chernii

Background. Infusion therapy (IT) is one of the main methods of drug therapy optimization. The essence of IT is to correct homeostasis disorders in order to detoxify, to restore the disrupted microcirculation and tissue perfusion, to eliminate the disorders of rheological and coagulation blood properties, to eliminate metabolic disorders, to improve drug delivery to the pathological focus, to restore circulating blood volume, to normalize fluid and electrolyte and acid-base balance. Objective. To describe modern IT. Materials and methods. Analysis of the literature sources on this topic. Results and discussion. Requirements for modern plasma substitutes include safety, sufficient and long-lasting volemic effect, rapid renal excretion, lack of accumulation and effect on the coagulation system, maximum similarity to blood plasma, and availability. There are several classes of plasma substitutes, and each of them has its own indications. For example, crystalloids are prescribed for dehydration, and colloids – for hypovolemia. The infusion volume is calculated based on the physiological needs of the organism, taking into account pathological fluid loss (fever, shortness of breath, postoperative wound drainage, vomiting, polyuria). Endogenous intoxication (EI) – a pathological condition that occurs as a result of exposure to toxic substances of exogenous or endogenous nature, which cause dysfunction and the development of extreme conditions – is an important field of IT application. EI can accompany chronic heart failure, peripheral vessels atherosclerosis, autoimmune and allergic diseases. Toxins have a direct (direct destruction of proteins and lipids, blocking of synthetic and oxidative processes in the cell) and indirect (microcirculation system and vascular tone disorders, changes of blood rheological properties) adverse effects. Clinical manifestations of EI include fever, malaise, and the dysfunction of various internal organs. As EI depletes the natural mechanisms of detoxification, worsens the clinical course of the disease, reduces drug sensitivity, suppresses immunity, it is an indication to detoxification via infusion. The tasks of the latter are to improve tissue perfusion, to provide hemodilution with a decrease in the toxins’ concentration, to stimulate diuresis, to eliminate acidosis, and to maintain the functional state of hepatocytes. For this purpose, solutions of polyatomic alcohols (Reosorbilact, Xylate, “Yuria-Pharm”) can be used. Reosorbilact increases the circulating blood volume, improves microcirculation and rheological blood properties, increases tissue perfusion, promotes “wash-out” of toxins, corrects acidosis and fluid and electrolyte balance, normalizes hepatocyte function, improving the own detoxification mechanisms. In case of microcirculation disturbances, it is reasonable to use the combined IT with the inclusion of Reosorbilact, Latren and Tivortin (“Yuria-Pharm”). Latren increases the elasticity of erythrocytes, reduces the aggregation of erythrocytes and platelets, normalizes the electrolyte composition of blood plasma, and Tivortin acts as a substrate for the formation of nitric oxide – the main signaling molecule of the endothelium. In addition to EI, IT usage is often prescribed for diabetic ketoacidosis. In such cases, it is advisable to use Xylate (“Yuria-Pharm”), which has antiketogenic properties, improves hemodynamics, corrects acidosis, and does not increase blood glucose levels. Xylate is recommended to be used only after preliminary rehydration with the help of isotonic saline solutions. Conclusions. 1. IT is an important method of treating a number of diseases. 2. EI accompanies not only diseases that involve intoxication syndrome, but also almost all internal diseases. 3. Reosorbilact and Xylate are the optimal solutions for detoxification. 4. It is reasonable to use combined IT, for example, the combination of Reosorbilact with Latren and Tivortin.


1989 ◽  
Vol 256 (5) ◽  
pp. R1155-R1159
Author(s):  
C. H. Metzler ◽  
D. J. Ramsay

The current study was designed to investigate the potential of atrial peptide to serve as a physiological regulator of aldosterone secretion. Conscious chronically instrumented dogs were given a constant intravenous infusion of either atrial peptide [ANP-(1-28); 5, 25, or 100 ng.kg-1.min-1] or vehicle (saline). Once steady-state conditions were achieved, angiotensin II was infused in a ramp design to stimulate aldosterone secretion (2.5-40 ng.kg-1.min-1). In the absence of atrial peptide, angiotensin II induced dose-dependent increases in plasma aldosterone concentration. In the presence of a 5-ng.kg-1.min-1 infusion of atrial peptide, the aldosterone response was reduced an average of 65 +/- 11%. When atrial peptide was infused at 25 and 100 ng.kg-1.min-1, the response was totally abolished. These results show that atrial peptide is a potent inhibitor of angiotensin II-stimulated aldosterone secretion. The results suggest that normal variations in plasma atrial peptide concentration can play an important role in the regulation of aldosterone secretion and fluid and electrolyte balance.


Author(s):  
Anne Craig ◽  
Anthea Hatfield

This chapter will tell you how surgery affects fluid balance and how the body controls fluids. Fluid compartments in the body and the nature of fluids are described. Disorders of fluid balance, the use of fluids to restore blood volume, and extra cellular fluid volume are all discussed. Management of fluid deficit, fluid overload, and pulmonary oedema and how to correct electrolyte balance are all clearly set out. Recommendations for fluids after different types of surgery and fluids for patients with renal and cardiac failure are given.


1955 ◽  
Vol 184 (1) ◽  
pp. 55-58 ◽  
Author(s):  
Elizabeth W. Rauschkolb ◽  
Gordon L. Farrell ◽  
Simon Koletsky

Adrenal venous blood was collected from hypophysectomized and sham-hypophysectomized dogs 6 days postoperatively. 17-Hydroxycorticosterone, corticosterone, 11-desoxy-17-hydroxycorticosterone and aldosterone were isolated by paper chromatography. Histological examination of the sellar and suprasellar regions of the hypophysectomized dogs demonstrated the absence of pituitary tissue. The adrenal glands of the hypophysectomized dogs showed cortical atrophy which did not involve the zona glomerulosa. The rate of secretion of aldosterone by the hypophysectomized dogs was found to be approximately 66% of that of the control, sham hypophysectomized, dogs. The rates of secretion of 17-hydroxycorticosterone, corticosterone and 11-desoxy-17-hydroxycorticosterone were found to be approximately 10% of that of the controls. The ability of the hypophysectomized dog to remain in electrolyte balance appears to be due in large measure to the continued secretion of aldosterone.


Sign in / Sign up

Export Citation Format

Share Document