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Amino Acids

, Volume 17, Issue 3, pp 277–283 | Cite as

Alteration in the D-amino acid content of the rat pineal gland under anesthesia

  • K. Hamase
  • H. Homma
  • Y. Takigawa
  • K. Imai
Full Papers

Summary

In a previous report (Hamase, K. et al., Biochim Biophys Acta 1134: 214–222 (1997)), we showed that the rat pineal gland contains D-leucine (D-Leu) as well as D-aspartic acid (D-Asp). In this communication we report alterations in the content of these D-amino acids during anesthesia. The D-Asp content was significantly increased from 2.8 to 5.0, 4.8 and 5.8 nmol/pineal gland by administration of ether, urethane and pentobarbital, respectively. In contrast, the D-Leu content was decreased by administration of urethane or pentobarbital. The D-Leu content decreased from 4.2 to 2.2 pmol/pineal gland 4 hours after administration of urethane, although the content remained unchanged until 1.5 hours after administration. The content of the L-enantiomers of these amino acids were not affected by anesthesia. The urethane-induced decrease in D-leucine content was almost completely suppressed by aβ-agonist, (-)-isoproterenol, whereas the agonist itself had no effect.

Keywords

Amino acids D-Aspartic acid D-Leucine Pineal gland Sympathetic nervous system Anesthesia 

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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • K. Hamase
    • 1
  • H. Homma
    • 1
  • Y. Takigawa
    • 1
  • K. Imai
    • 1
  1. 1.Graduate School of Pharmaceutical SciencesThe University of TokyoTokyoJapan

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