Abstract
The metabolic effects of an ammonium salt on the liver and kidney were investigated. Rats were allowed free access to a 0.28 M ammonium chloride (NH4Cl) solution for 7- and 8-day periods. Serum urea concentration was significantly increased after 8 days of NH4Cl ingestion. However the following hepatic urea cycle enzymes remained unchanged: CPS, OTC, ASS and ASL. The pattern of urinary urea excretion was variable. When the data for the 7-day period were pooled, there was no significant difference between the control and acidotic groups. However, when they were examined on a daily basis, acidosis significantly decreased urea excretion on day 2. Urea excretion then began to increase, reached the control value on day 4 and was significantly greater than the control value on day 7. Urinary ammonium excretion of the acidotic group was significantly increased on day 2 and continued to rise throughout the 7-day period. Renal phosphate-dependent glutaminase of the acidotic group was significantly increased on the eighth day. These data indicate that NH4Cl ingestion alters the pattern of urea excretion in a manner not previously demonstrated.
Published Version
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