Studies on the mechanism of rubidium-induced kaliuresis
Compared to a control group (reduction of plasma potassium to 3.4 ± 0.1 mM by short-term potassium depletion) with a fractional potassium excretion of 2.1 ± 0.3%, rubidium-treated rats excreted potassium at a much higher rate of 14.6 ± 3.0%. The potassium content of principal cells was, however, significantly lower in rubidium …
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Comparison of renal excretion of rubidium and potassium
The simultaneous renal clearances of rubidium and potassium were studied during the infusion of solutions of rubidium chloride into intact anesthetized dogs. The effects of prior loading with potassium were studied, as were also the responses to acute administration of acetazoleamide and meralluride. It was observed that the clearance of rubidium was …
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Studies on the mechanism of rubidium-induced kaliuresis
Studies on the mechanism of rubidium-induced kaliuresis. Renal clearance and electron microprobe methods were used 1) to elucidate the effects of chronic rubidium administration on potassium transport and 2) to localize, by the use of amiloride in acute experiments, the tubule site of interaction between rubidium and potassium. …
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Renal excretion of rubidium and potassium: an electron …
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Comparison of renal excretion of rubidium and …
The simultaneous renal clearances of rubidium and potassium were studied during the infusion of solutions of rubidium chloride into intact anesthetized dogs. The effects of prior loading with potas...
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Relationship of renal ammonia production and potassium homeostasis
Abstract. Renal ammonia production appears to be intimately related to potassium homeostasis, and the two may comprise the components of a closed loop regulatory system. Studies with both intact organisms and in vitro systems indicate that potassium depletion stimulates and chronic potassium-loading suppresses renal ammonia …
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Risk Assessment Visualization of Rubidium Compounds: Comparison …
Urinary rubidium excretion recovery of 8.0 – 10.5 % shows that urine can be a useful diagnostic tool for rubidium expo- sure. The present results reveal that rubidium shows different biological effects depending on the counter anion.
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Renal Potassium Excretion Visualized on 82 …
Rubidium is a potassium analogue [8, 9], and therefore, rubidium has frequently been used as a marker of potassium in transport studies [10, 11]. It has been shown that …
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The role of residual renal function on potassium intake and excretion …
Background Patients on chronic dialysis are at increased risk of developing disorders in potassium balance. The preservation of residual renal function (RRF), frequently observed in patients on peritoneal dialysis (PD), may contribute to better control of serum potassium. This study aimed to investigate the role residual renal function on …
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Effect of K depletion on renal K and Rb excretion: Evidence …
Effect of K depletion on renal K and Rb excretion: Evidence for activation of K reabsorption. Prolonged potassium depletion activates tubular transport mechanisms mediating potassium absorption. To study ion specificity and factors that modulate the activity of potassium transport pathways, fractional potassium excretion (FEK) was …
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Renal Potassium Excretion Visualized on 82 Rubidium …
The positron emission tomography (PET) flow tracer 82Rubidium is a known potassium analogue. During our studies of tumor blood flow in prostate cancer, we found that approximately 10% of the patients had high urinary 82Rubidium activity. In roughly half of these patients, the increased renal rubidium/potassium excretion was either …
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Potassium and rubidium contents (mmollkg dry wt) of renal …
Download Table | Potassium and rubidium contents (mmollkg dry wt) of renal tubule cells following administration of amiloride from publication: Studies on the mechanism of rubidium-induced ...
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Comparison of renal excretion of rubidium and …
The simultaneous renal clearances of rubidium and potassium were studied during the infusion of solutions of rubidium chloride into intact anesthetized dogs. The effects of …
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Cell rubidium uptake: A method for studying functional …
Comparison of renal excretion of rubidium and potassium. Am J Physiol. 1959; 197: 1297-1302. PubMed; Google Scholar; Schafer J.A. ... Potassium and rubidium permeability and potassium conductance of the beta-cell membrane in mouse islets of Langerhans. Q J Exp Physiol. 1986; 71: 205-222. Scopus (10)
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Renal excretion of rubidium and potassium: An …
probe studies was carried out to investigate renal rubidium excretion and rubidium distribution between plasma and individual tubule cells. Saline-infused animals were …
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Effect of K depletion on renal K and Rb excretion: Evidence …
Preferential retention of potassium compared to rubidium in potassium-depleted rats was accentuated (FE K /FE R b 0.33 ± 0.01) when residual potassium secretion was inhibited by amiloride and K-H exchange stimulated by increased distal buffer delivery (metabolic alkalosis).
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Comparison of renal excretion of rubidium and …
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Table 2 provides data on renal function in chronic rubidium
We have previously shown that infusion of rubidium is a powerful stimulus for potassium excretion, thus accounting for a tendency for the plasma potassium concentration to decline in control ...
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Renal excretion of rubidium and potassium: an electron …
Renal excretion of rubidium and potassium: an electron microprobe and clearance study. scientific article published in October 1988. Statements. instance of. scholarly article. 1 reference. stated in.
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Renal Potassium Excretion Visualized on 82Rubidium PET/CT
This is the first time enhanced renal potassium excretion is visualized on 82Rubidium PET/CT. The positron emission tomography (PET) flow tracer 82Rubidium is a known potassium analogue. During our studies of tumor blood flow in prostate cancer, we found that approximately 10% of the patients had high urinary 82Rubidium activity. In roughly …
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Excretion of cesium and rubidium via the branchial …
through the same pathway as the K? excretion in MR cells. Keywords Cesium Gill Mitochondrion-rich cell Mozambique tilapia Potassium Rubidium Introduction Mechanisms of ion regulation in teleost fishes have been investigated mainly from the perspective of plasma osmoregulation over the years. In the last decade, precise
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Estimation of 24-hour urinary sodium and potassium excretion …
Under the assumption of non-renal losses of 7% of sodium and 23% of potassium [14], the mean sodium intake of Chinese adults aged 18–89 y in CNNS 2015 was estimated at 4431mg/d (4121 mg/d /0.93 = 4431 mg/d), and mean potassium intake was 1992 mg/d (1534 mg/d /0.77 = 1992 mg/d), based on the 24-h urinary sodium and …
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Excretion of cesium and rubidium via the branchial potassium
Using an insolubilization technique in combination with element analysis, we examined the possible excretion of Cs+ and Rb+, both known to be biochemical analogs of K+, through the K+-transporting pathway in the gills of seawater-adapted Mozambique tilapia. To detect ion excretion from gills infused with Rb+ or Cs+, the isolated gills were …
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The Physiological Behavior of Rubidium and Cesium in …
The rate of disappearance of Rb86 from the plasma, the biologic decay rates of Rb86, and the applicability of Rb86 as a tracer of potassium in man with and without chronic congestive heart failure. J Lab Clin Med. 1955 Mar;45(3):371–394. [ PubMed] [ Google Scholar] COHN WE, KOHN RW. Ion-exchange separation of the alkali metals.
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Excretion of cesium and rubidium via the branchial potassium
For a better understanding of the molecular mechanism of K+ excretion in the gills, cDNA sequences of renal outer medullary K+ channel (ROMK), potassium large conductance Ca(2+)-activated channel ...
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Regulation of Potassium Homeostasis
Long-term maintenance of potassium homeostasis is achieved by alterations in renal excretion of potassium in response to variations in intake. Understanding the …
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Renal potassium transport: mechanisms and regulation
The regulation of potassium metabolism involves mechanisms for the appropriate distribution between the intra- and extracellular fluid compartments and for the excretion by the kidney. Clearance and single-nephron studies show that renal excretion is determined by regulated potassium secretion and potassium reabsorption, …
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Renal excretion of rubidium and potassium: An …
Nevertheless, rubidium stimulated fractional potassium excretion above the levels observed in both saline- and potassium-loaded animals. When compared with their …
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Risk Assessment Visualization of Rubidium Compounds: Comparison …
Urinary rubidium excretion recovery of 8.0-10.5 % shows that urine can be a useful diagnostic tool for rubidium exposure. The present results reveal that rubidium shows different biological ...
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Comparison of renal excretion of rubidium and potassium.
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