Abstract：
:To mutant ddY/DAO(-) mice lacking D-amino-acid oxidase activity and normal ddY/DAO(+) mice, five D-amino acids (D-Asp, D-Ser, D-Ala, D-Leu and D-Pro) were orally administered for two weeks, and the D-amino acid levels were examined in seven brain regions. The levels of D-Asp markedly increased in the pituitary and pineal glands in both strains. In the ddY/DAO(+) mice, the levels of the other D-amino acids did not significantly change in most of the brain regions. While in the ddY/DAO(-) mice the levels of D-Ser significantly increased in most of the brain regions except for the cerebrum and hippocampus. The levels of D-Ala and D-Leu increased in all regions but the levels of D-Pro did not significantly change. The same five D-amino acids were intravenously injected into Wistar rats and the D-amino acid levels in their brains were examined for 60 min after the administration. The levels of D-Asp markedly increased in the pineal gland 3 min after the administration, while the levels of D-Ser, D-Ala, and D-Pro increased both in the pineal and pituitary glands, the levels of D-Leu increased in all brain regions. These results are useful for the elucidation of the origins and regulation of D-amino acids in the mammalian body.
journal_name
Amino Acidsjournal_title
Amino acidsauthors
Morikawa A,Hamase K,Inoue T,Konno R,Zaitsu Kdoi
10.1007/s00726-005-0357-8subject
Has Abstractpub_date
2007-01-01 00:00:00pages
13-20issue
1eissn
0939-4451issn
1438-2199journal_volume
32pub_type
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