Oxidative degradation of polyamines in rat pancreatic hypertrophy.
Biochim Biophys Acta
; 1406(3): 321-6, 1998 Apr 28.
Article
in En
| MEDLINE
| ID: mdl-9630703
ABSTRACT
In the hypertrophic pancreas, we studied the oxidative degradation of polyamines, which are endogenous polycations important for cell division, growth and differentiation. To induce pancreatic hypertrophy, rats were fed on a semi-synthetic diet containing a daily dose of 42 mg phytohaemagglutinin per rat for 5 or 10 days. In the model, the activities of polyamine oxidase (the enzyme that degrades spermidine, spermine and mainly their acetyl derivatives) and diamine oxidase (the key enzyme of terminal catabolism of polyamines in vivo) increased by 100-180% and 90-100%, respectively, parallel to an elevation in polyamine content (40-100%). The results suggest that in pancreas hypertrophy, which does not exhibit stimulation of spermidine/spermine N1-acetyltransferase activity, increases in the activity of polyamine and diamine oxidases are related events that lead to putrescine formation and removal of excess polyamines.
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Database:
MEDLINE
Main subject:
Pancreas
/
Polyamines
/
Spermine
Limits:
Animals
Language:
En
Year:
1998
Type:
Article