Expression and regulation of adrenodoxin and P450scc mRNA in rodent tissues.

Expression and regulation of adrenodoxin and P450scc mRNA in rodent tissues.
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啮齿动物组织中肾上腺素和 P450scc mRNA 的表达和调节。

DOI:
10.1089/dna.1991.10.339
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发表时间:
1991
影响因子:
3.1
通讯作者:
Vaisse,C
Vaisse,C
中科院分区:
生物学4区
文献类型:
--
作者:
Mellon,SH;Kushner,JA;Vaisse,C

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甾体生成的限速步骤是胆固醇向孕烯醇酮的转化。该反应发生在线粒体膜内的类固醇组织中,由胆固醇侧链裂解酶介导。这种酶系统通过它的三种蛋白质成分将电子从NADPH转移到胆固醇:肾上腺素还原酶、肾上腺素还原酶和末端氧化酶P450scc。我们之前在小鼠间质瘤MA-10细胞中发现P450scc mRNA受热带激素和cAMP的调节,其机制不依赖于环己亚胺。我们现在表明,在MA-10细胞中,胆固醇侧链切割酶系统的另一个组成部分肾上腺素还蛋白的mRNA受热带激素和cAMP的调节。我们克隆了大鼠肾上腺素的cDNA,通过RNase保护实验分析了大鼠不同组织和MA-10细胞中肾上腺素的mRNA表达。肾上腺素还蛋白mRNA在几乎所有被检查的大鼠组织中都有发现,尽管它在肾上腺、卵巢和睾丸中含量最多。MA-10细胞合成两种肾上腺素还毒素mRNA,一种为1.2 kb,另一种为0.8 kb。这两种肾上腺素mrna增加约6倍于1 mM8-Br-cAMP,增加5倍于10 μMforskolin,增加3倍于25 ng/ml hCG和100 ng/ml LH。肾上腺素还蛋白mRNA的最大积累发生在激素刺激的4小时。cAMP介导的肾上腺素还馨mRNA积累的增加是独立于蛋白质合成的,因为环己亚胺或嘌呤霉素在没有或存在cAMP的情况下不会抑制甚至增加肾上腺素还馨mRNA的积累。
The rate-limiting step in steroidogenesis is the conversion of cholesterol to pregnenolone. This reaction occurs in steroidogenic tissue in the inner mitochondrial membrane, and is mediated by the cholesterol side-chain cleavage enzyme. This enzyme system transfers electrons from NADPH to cholesterol through its three protein components: adrenodoxin reductase, adrenodoxin, and the terminal oxidase, P450scc. We have previously shown that P450scc mRNA is regulated by tropic hormones and cAMP by a cycloheximide-independent mechanism in mouse Leydig tumor MA-10 cells. We now show that the mRNA for adrenodoxin, another component of the cholesterol side-chain cleavage enzyme system, is regulated by tropic hormones and cAMP in MA-10 cells. We cloned rat adrenodoxin cDNA to analyze adrenodoxin mRNA in various rat tissues and in MA-10 cells by RNase protection assays. Adrenodoxin mRNA is found in virtually all rat tissues examined, although it is most abundant in adrenals, ovaries, and testes. MA-10 cells synthesize two species of adrenodoxin mRNA, one of 1.2 kb and the other of 0.8 kb. Both of these adrenodoxin mRNAs are increased approximately six-fold by 1 mM8-Br-cAMP, five-fold by 10 μMforskolin, and three-fold by both 25 ng/ml hCG and by 100 ng/ml LH. Maximal adrenodoxin mRNA accumulation occurs by 4 h of hormonal stimulation. The cAMP-mediated increase in adrenodoxin mRNA accumulation is independent of protein synthesis, since treatment with cycloheximide or puromycin in the absence or presence of cAMP does not inhibit, and even increases, adrenodoxin mRNA accumulation.
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
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通讯作者: Richards,JS
使用特异性荧光探针研究肾上腺素还蛋白与肾上腺素还素还原酶和细胞色素P-450scc的相互作用。
DOI: --
发表时间: 1987
期刊: The Journal of biological chemistry
影响因子: --
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DOI: 10.1093/oxfordjournals.jbchem.a123015
发表时间: 1990
影响因子: 2.7
作者:
Y. Sagara;H. Sawae;A. Kimura;Y. Sagara;K. Morohashi;K. Miyoshi;T. Horiuchi
通讯作者: T. Horiuchi
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DOI: 10.1016/s0021-9258(19)44275-0
发表时间: 1973
期刊: The Journal of biological chemistry
影响因子: --
作者:
M. Tanaka;M. Haniu;K. Yasunobu;T. Kimura
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人类肾上腺素基因的克隆和结构。
DOI: 10.1089/dna.1988.7.609
发表时间: 1988
期刊: DNA (Mary Ann Liebert, Inc.)
影响因子: --
作者:
Chang,CY;Wu,DA;Lai,CC;Miller,WL;Chung,BC
通讯作者: Chung,BC