Plasma and brain ammonia and amino acids in rats measured after feeding 75% casein or 28% egg white

B. A. Semon, P. M.B. Leung, Quinton Rogers, D. W. Gietzen

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Male rats were trained to consume their daily food intake in 3 h. When rats were fed 6% casein for 14 d and were then fed either the 6 or 75% casein diet for 1 d, the plasma and brain ammonia concentrations of rats fed 75% casein were higher (P < 0.05) at 23 h after test meal initiation compared to those of rats fed 6% casein. When rats were fed 6% casein for 13 d and then fed the same 6% casein diet with or without an addition 15% ammonium acetate for an additional 7 d before feeding 75% casein for 1 d, the plasma ammonia concentration of each group was not different, but plasma and brain amino acid concentrations were lower in rats prefed 15% ammonium acetate before the 75% casein diet. When rats were fed 6.8% egg white for 9 d and then fed 27.9% egg white for an additional 7 d, food intake of rats fed the 27.9% egg white diet was lower (P < 0.05, paired t-test) for 4 d compared with that during the 3-d pretest period. When rats were meal-fed the 6.8% egg white diet for 13 d and then fed either the same 6.8% egg white diet or the 27.9% egg white diet for 1 d, plasma ammonia and plasma and brain amino acid concentrations were higher at 5 h after test meal initiation (P < 0.05) in rats fed 27.9% egg white compared to those of rats fed 6.8% egg white. At 23 h after test meal initiation, plasma ammonia, plasma amino acid and most brain amino acid concentrations were lower than they were at 5 h after test meal initiation in rats fed 27.9% egg white.

Original languageEnglish (US)
Pages (from-to)1583-1592
Number of pages10
JournalJournal of Nutrition
Volume119
Issue number11
DOIs
StatePublished - Jan 1 1989

Keywords

  • ammonium acetate
  • brain amino acids
  • brain ammonia
  • casein
  • egg white protein
  • energy intake
  • high dietary protein
  • male rats
  • plasma amino acids
  • plasma ammonia

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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