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首页> 外文期刊>Endocrine Research >Regulation of CYP11B2 gene expression by protein kinase C.
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Regulation of CYP11B2 gene expression by protein kinase C.

机译:CYP11B2基因表达的蛋白激酶C调控。

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摘要

Bisindolylmaleimide, a protein kinase C (PKC) inhibitor, was shown to stimulate the hamster CYP11B2 promoter activity in transfected NCI-H295 cells. In this study we have found that TPA, an activator of PKC, also inhibited the hamster CYP11B2 promoter activity. DAG-dependent PKC alpha and PKC epsilon, and atypical PKC zeta were detected in hamster adrenal zona glomerulosa, whereas the isoforms alpha, epsilon, zeta and theta were found in NCI-H295 cells. CYP11B2 promoter activity was inhibited in cells co-transfected with constitutively active PKC alpha and epsilon mutants, whereas it was increased with the constitutively active PKC zeta mutant. Dominant negative PKC alpha, epsilon and zeta mutants stimulated the promoter activity. Go6976, a specific inhibitor of classical PKCs, enhanced promoter activity, providing further evidence that PKC alpha, the only classical PKC revealed in hamster adrenal and NCI-H295 cells, was involved in the promoter inhibition.
机译:已显示蛋白激酶C(PKC)抑制剂Bisindolylmaleimide可刺激转染的NCI-H295细胞中的仓鼠CYP11B2启动子活性。在这项研究中,我们发现TPA,一种PKC的激活剂,也抑制仓鼠CYP11B2启动子的活性。在仓鼠肾上腺肾小球中检测到DAG依赖的PKCα和PKC epsilon,以及非典型PKC zeta,而在NCI-H295细胞中发现了同工型α,ε,zeta和theta。 CYP11B2启动子活性在组成性活性PKCα和epsilon突变体共转染的细胞中被抑制,而在组成性活性PKC zeta突变体中被增加。显着的阴性PKCα,ε和zeta突变体刺激了启动子活性。 Go6976是经典PKC的特异性抑制剂,可增强启动子活性,进一步证明PKCα是仓鼠肾上腺和NCI-H295细胞中唯一显示的经典PKC,参与了启动子抑制。

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