Effect of cold exposure on polyamine levels and ornithine decarboxylase activity of goldfish tissues

被引:1
作者
Notari, S [1 ]
Lucchi, R [1 ]
Poli, A [1 ]
机构
[1] Univ Bologna, Dept Biol, I-40126 Bologna, Italy
关键词
goldfish; temperature; polyamines; ornithine decarboxylase;
D O I
10.1007/s000180050150
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Goldfish exposed to the cold (5 degrees C) for a week exhibited modifications in polyamines metabolism, as shown by the increase of putrescine levels in liver, heart, muscle and brain, whereas the content of spermidine and spermine was unchanged. Putrescine increases in tissues considered were concomitant with a remarkable rise in ornithine decarboxylase activity. Kinetic analysis of brain enzyme activity showed that the apparent K-m was unchanged by cold exposure, whereas V-max was strongly increased.
引用
收藏
页码:277 / 281
页数:5
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