scholarly journals Potassium recycling

1987 ◽  
Vol 31 (3) ◽  
pp. 695-703 ◽  
Author(s):  
Rex L. Jamison
Keyword(s):  
Potassium Recycling

Effects of aldosterone on potassium recycling in the kidney of adrenalectomized rats

1985 ◽  
Vol 248 (2) ◽  
pp. F219-F227 ◽  
Author(s):  
E. Higashihara ◽  
J. P. Kokko
Keyword(s):  
Wistar Rats ◽  
Collecting Duct ◽  
Distal Tubule ◽  
Feedback System ◽  
Blood Levels ◽  
Segmental Analysis ◽  
Urinary Potassium ◽  
Papillary Collecting Duct ◽  
Potassium Secretion ◽  
Potassium Recycling

Recent studies have suggested that potassium, like urea, undergoes medullary recycling. The present cortical and papillary micropuncture studies were designed to confirm the existence of medullary potassium recycling and to determine whether acute infusions of aldosterone affected this phenomenon. Thus, nephron segmental analysis of potassium and sodium transport was conducted in adrenalectomized Munich-Wistar rats and similarly prepared rats that received aldosterone acutely to achieve physiological blood levels. The clearance results demonstrated that aldosterone has an acute antinatriuretic and a kaliuretic effect, whereas the micropuncture studies demonstrated that 1) aldosterone increases potassium secretion between early and late distal tubule punctures; 2) aldosterone causes an increase in delivery of potassium to the papillary collecting duct; 3) aldosterone does not increase potassium secretion across the papillary collecting duct; and 4) aldosterone significantly increases medullary potassium recycling as evidenced by increased quantities of potassium present at the bend of the loop of Henle in response to aldosterone infusions. Thus, the studies confirm the existence of potassium recycling and suggest that this phenomenon is a feedback system that, in part, regulates urinary potassium excretion.

Effect of acute potassium load on reabsorption in Henle's loop in the rat

1983 ◽  
Vol 245 (5) ◽  
pp. F569-F576 ◽  
Author(s):  
C. R. Sufit ◽  
R. L. Jamison
Keyword(s):  
Renal Medulla ◽  
Distal Tubule ◽  
Potassium Excretion ◽  
Water Delivery ◽  
Henle's Loop ◽  
Low Potassium ◽  
Collecting Tubule ◽  
Before And After ◽  
Potassium Recycling ◽  
Tubule Fluid

Rats fed a low potassium diet were studied before and after KCl infusion to determine whether potassium recycling in the renal medulla accelerates potassium excretion by increasing delivery of sodium, water, and potassium to the distal tubule. Fluid samples were obtained from the end-proximal and beginning-distal tubule before and at the same sites after KCl loading by re-collection micropuncture and were compared with samples obtained from similarly fed control animals not infused with KCl. Potassium excretion increased in the KCl group from 3 to 48% but remained low in the controls. Fractional sodium and water delivery to end-proximal and beginning-distal tubule increased with time equally in both groups. Potassium reabsorption in Henle's loop fell from 75 to 58% (P less than 0.005) after KCl infusion but not significantly in the controls (from 77 to 75%). Fractional potassium delivery to the distal tubule increased from 12 to 26% (P less than 0.005) in the KCl group, which could account for over half the potassium excreted. The increase in controls from 12 to 17% was significantly less (P less than 0.02). These findings suggest that potassium recycling reduces potassium reabsorption in Henle's loop, enabling the loop to participate with the distal and collecting tubule in accelerating urinary excretion of an acute potassium load.

scholarly journals Analysis of inner ear potassium recycling genes as potential factors associated with tinnitus

2012 ◽  
Vol 25 (4) ◽  
Author(s):  
Małgorzata Pawełczyk ◽  
Elżbieta Rajkowska ◽  
Piotr Kotyło ◽  
Adam Dudarewicz ◽  
Guy Camp ◽  
...  
Keyword(s):  
Inner Ear ◽  
Factors Associated ◽  
Potassium Recycling ◽  
Potential Factors

Abstract

The contribution of genes involved in potassium-recycling in the inner ear to noise-induced hearing loss

2006 ◽  
Vol 27 (8) ◽  
pp. 786-795 ◽  
Author(s):  
Lut Van Laer ◽  
Per-Inge Carlsson ◽  
Natacha Ottschytsch ◽  
Marie-Louise Bondeson ◽  
Annelies Konings ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Inner Ear ◽  
Noise Induced Hearing Loss ◽  
Potassium Recycling

scholarly journals Suppression of potassium-recycling in the renal medulla by short-term potassium deprivation

1979 ◽  
Vol 16 (6) ◽  
pp. 704-709 ◽  
Author(s):  
Dennis C. Dobyan ◽  
Frank B. Lacy ◽  
Rex L. Jamison
Keyword(s):  
Renal Medulla ◽  
Short Term ◽  
Potassium Recycling ◽  
Potassium Deprivation
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