Effect of Dietary Amino Acids on Behavior and Serum Levels of Amino Acids in Stress Loaded Rats.

Abstract

SummaryInterrelationships between behavior and concentrations of serum amino acids in stressed rats with immobilization and water immersion were investigated. Rats were subjected to 7h of immobilization with water-immersion stress (IWS) in each sequential day, and serum amino acids were then determined. On the first day, serum taurine, threo nine, valine, leucine, isoleucine, phenylalanine, lysine, and histidine (increased-type of amino acids) were significantly increased, but alanine (decreased-type) was significantly de creased. On days 3 and 7, the increase was retained, except for threonine, histidine, and ly sine. Spontaneous activities (locomotion, rearing behavior, hole-poking) under loading water-immersion stress were significantly decreased, but a supplementation of branched chain amino acids (BCAA) led to recovery. We suggest that pretreatment with some kind of increased type of amino acid, such as BCAA, might effectively prevent decline in sponta neous activities evoked by water-immersion stress.

Determination of free amino acids of porcine serum responsible for the meat quality by 1H NMR and HPLC analyses

“…However, it is postulated that some amino acids in blood may be indicators of internal or external signals (Tom and Nair, 2006). Interestingly, it was reported that levels of several free amino acids, including leucine, phenylalanine, and valine, were significantly higher under water-immersion stress in rats (Kitajima et al, 2002). Likewise, the significantly higher level of three amino acids in the HpHG observed in the present study may reflect the meat quality of Berkshire pigs.…”

Co-Administration of Proline and Inorganic Iron Enhance the Improvement of Behavioral and Hematological Function of Iron-Deficient Anemic Rats

“…It is conceivable that these amino acid pools play an important part in the supply of proline into the blood. Actually, according to our recent data, water-immersion stress increases the branched chain amino acid concentration in rat serum, mitigating the stress reaction provoked by water-immersion stress (27). In addition, in a human study, subjects with fa tigue had high levels of certain kinds of serum gluco neogenic amino acids (28).…”