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Polyamine biosynthetic decarboxylases in muscles of rats with different experimental myopathies.

Abstract：

:The activities of the two polyamine biosynthetic decarboxylases (PBD), L-ornithine decarboxylase (ODC) and S-adenosyl-L-methionine decarboxylase (SAMD), have been measured in quadriceps femoris of rats killed at different times after the induction of calciphylaxis- or serotonin(5-HT)-induced myopathy. Decreases in both PBD levels were observed at early times after both myotoxic treatments. Subsequent progressive increases in both enzyme levels were observed to nearly control values by 4 days after 5-HT administration. In the 5-HT-treated rats, the effects on the myocardial PBD activities were different from those in skeletal muscle, with no effect on ODC but much on SAMD, when rats were killed shortly after 5-HT injection. These results demonstrate that the time-course of the changes in PBD activities in quadriceps femoris mirrors quite well the successive occurrence of degenerative and regenerative processes during the calciphylaxis-induced myopathy and the 5-HT-induced myopathy; it is 5-HT that is mainly responsible for the decreases in PBD levels observed in both experimental myopathies, since dihydrotachysterol alone was without any effect on PBD activity levels and 5-HT alone was effective; myocardial ODC reacts more slowly to 5-HT than quadriceps femoris ODC.

journal_name

J Neurol Sci

journal_title

Journal of the neurological sciences

authors

Lorenzini EC,Colombo B,Ferioli ME,Scalabrino G,Canal N

doi

10.1016/0022-510x(89)90004-x

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

27-35

issue

1

eissn

0022-510X

issn

1878-5883

pii

0022-510X(89)90004-X

journal_volume

89

pub_type

杂志文章

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