Distribution of cesium in the organism and its effect on the nucleotide metabolism enzymes.
After the intraperitoneal administration of 0.5 mEq 134 CsCI . kg -1 to mice, the maximum cesium level in the kidney's, heart, lungs and liver was found in the first hour (T 1/2 13 h), in the muscles after 8 h (T 1/2 180 h), in the brain after 24 h (T 1/2 140 h) and in the blood after 24 h. Maximum cesium levels were found in the muscles. Rats excreted about 17% of the administered dose in 24 h and 38% in 144 h. Most of the cesium (about 90%) is excreted in the urine. In rats, equalization of the plasma and RBC cesium levels takes longer than 6h. Cesium transport is not entirely dependent on the ATPase system, as shown by the results given by the crude mitochondrial fraction with a reduced potassium content. Among the various univalent ions studied, the effect of cesium on creatine kinase, 5'-nucleotidase, phosphodiesterase and deaminase activity was the smallest.
D000659:AMP Deaminase / Q000378:metabolism; D000243:Adenosine Deaminase / Q000378:metabolism; D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D001692:Biological Transport; D002586:Cesium / Q000378:metabolism*; D002588:Cesium Radioisotopes; D006148:Guanine Deaminase / Q000378:metabolism; D008297:Male; D051379:Mice; D009132:Muscles / Q000378:metabolism; D011188:Potassium / Q000378:metabolism; D051381:Rats; D012413:Rubidium / Q000378:metabolism; D013997:Time Factors; D014018:Tissue Distribution
D002588:Cesium Radioisotopes; D002586:Cesium; D006148:Guanine Deaminase; D000243:Adenosine Deaminase; D000659:AMP Deaminase; D000251:Adenosine Triphosphatases; D012413:Rubidium; D011188:Potassium