Sessa A, Tunici P, Perin A. Polyamine acetylation in rat brain during N-ethyl-N-nitrosourea-induced cerebral carcinogenesis.
Cancer Lett 1995;
97:123-8. [PMID:
7585471 DOI:
10.1016/0304-3835(95)03962-v]
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Abstract
The behavior of cerebral polyamine acetylation was examined in rat brain during N-ethyl-N-nitrosourea-induced carcinogenesis. Before tumor development, treated brains exhibited an enhancement in cytosolic spermidine/spermine N1-acetyl-transferase activity with concomitant accumulation of N1-acetylspermidine and increases in putrescine and spermidine. This indicates a stimulation of the interconversion pathway of polyamines into putrescine, an important molecule for cell growth. Our data also show the presence of a cytosolic spermidine N8-acetyltransferase activity in fetal rat brain, with values similar to those previously observed in gliomas. The detection of cytosolic spermidine N8-acetyltransferase activity in tumors may thus represent the expression of a fetal gene that does not seem to have a particular function during carcinogenesis.
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