5-AMINOLEVULINATE SYNTHASE MESSENGER-RNA LEVELS IN THE HARDERIAN-GLAND OF SYRIAN-HAMSTERS - CORRELATION WITH PORPHYRIN CONCENTRATIONS AND REGULATION BY ANDROGENS AND MELATONIN

被引:51
作者
MENENDEZPELAEZ, A [1 ]
RODRIGUEZ, C [1 ]
DOMINGUEZ, P [1 ]
机构
[1] UNIV OVIEDO, DEPT BIOL FUNC, E-33006 OVIEDO, SPAIN
关键词
AMINOLEVULINATE SYNTHASE; GENE; ANDROGEN; MELATONIN; HARDERIAN GLAND; (HAMSTER);
D O I
10.1016/0303-7207(91)90154-K
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
The levels of 5-aminolevulinate synthase mRNA were investigated in the Harderian glands of male and female Syrian hamsters by using a cDNA clone from rat liver. Female hamsters showed higher levels of mRNA than those in males, while the administration of testosterone to female hamsters led to a reduction in mRNA levels. Castration of male hamsters caused a marked elevation of mRNA levels, whereas both the exposure to constant darkness or melatonin injections to castrated males partially prevented the effects of castration. Porphyrin concentration of Harderian glands showed a strong correlation with the mRNA levels of 5-aminolevulinate synthase in all the animals studied. These results lead to the conclusion that in this system, porphyrin metabolism is controlled through hormonal regulation of 5-aminolevulinate synthase gene expression.
引用
收藏
页码:177 / 182
页数:6
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