Suppression of methionine-induced hyperhomocysteinemia by glycine and serine in rats.
Biosci Biotechnol Biochem
; 70(10): 2403-9, 2006 Oct.
Article
in En
| MEDLINE
| ID: mdl-17031061
ABSTRACT
The hyperhomocysteinemia induced by a dietary addition of 1% methionine was significantly suppressed by the concurrent addition of 1% glycine or 1.4% serine to the same degree. The methionine-induced increase in the hepatic concentration of methionine metabolites was significantly suppressed by glycine and serine, but the hepatic cystathionine beta-synthase activity was not enhanced by these amino acids. When the methionine-supplemented diet was changed to the methionine plus glycine or serine diet, the plasma homocysteine concentration rapidly decreased during and after the first day. The hyperhomocysteinemia induced by an intraperitoneal injection with methionine was also suppressed by concurrent injection with glycine or serine, although the effect of serine was significantly greater than that of glycine. These results indicate that glycine and serine were effective for suppressing methionine-induced hyperhomocysteinemia serine and its precursor glycine are considered to have elicited their effects mainly by stimulating cystathionine synthesis by supplying serine, another substrate for cystathionine synthesis.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Serine
/
Hyperhomocysteinemia
/
Glycine
/
Methionine
Limits:
Animals
Language:
En
Journal:
Biosci Biotechnol Biochem
Journal subject:
BIOQUIMICA
/
BIOTECNOLOGIA
Year:
2006
Document type:
Article
Affiliation country:
Japón