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首页> 外文期刊>Endocrine Research >In vitro modulation of steroidogenesis and gene expression by melatonin: a study with porcine antral follicles.
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In vitro modulation of steroidogenesis and gene expression by melatonin: a study with porcine antral follicles.

机译:褪黑激素体外调节类固醇生成和基因表达的研究:猪窦卵泡的研究。

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摘要

The effects of melatonin on steroidogenesis and gene expression of CYP 11A, CYP 17, and CYP 19 were investigated using a porcine antral follicle culture model. Follicles were cultured with melatonin at doses of 10, 50, and 100 ng/mL in the presence and absence of an optimum dose of luteinizing hormone (LH) (100 ng/mL) for a period of 30 hours. It was found that melatonin stimulated progesterone production both in the presence and absence of LH. Androstenedione production was stimulated by melatonin at the highest dose of 100 ng/mL but melatonin had an inhibitory effect in the presence of LH. Estradiol production was not affected by melatonin alone, while in the presence of LH it showed a bimodal effect. Expression of genes for steroidogenic enzymes specific for the production of progesterone, androstenedione and estradiol (CYP 11A, CYP 17, and CYP 19, respectively) were also analyzed in the theca of follicles cultured with and without LH. Results showed an inhibition of CYP 11A and CYP 17 expression both in the presence and absence of LH. However, the expression of CYP 19 was not affected. Our results indicate that melatonin modulates ovarian theca cell steroidogenesis at the molecular level and this modulation may be mediated by its effects on the transcriptional activity of the steroidogenic enzymes.
机译:使用猪窦卵泡培养模型研究了褪黑激素对CYP 11A,CYP 17和CYP 19的类固醇生成和基因表达的影响。在存在和不存在最佳剂量的黄体生成激素(LH)(100 ng / mL)的情况下,用褪黑激素以10、50和100 ng / mL的剂量培养卵泡30小时。发现在有和没有LH的情况下,褪黑激素均刺激孕激素的产生。褪黑激素以最高剂量100 ng / mL刺激雄烯二酮的产生,但是褪黑激素在LH存在下具有抑制作用。雌二醇的产生不受单独的褪黑激素的影响,而在LH的存在下它表现出双峰效应。还分析了在有或没有LH的情况下培养的卵泡的卵泡膜中特异产生黄体酮,雄烯二酮和雌二醇的类固醇生成酶基因的表达(分别为CYP 11A,CYP 17和CYP 19)。结果显示在存在和不存在LH的情况下,CYP 11A和CYP 17表达均受到抑制。但是,CYP19的表达不受影响。我们的结果表明褪黑激素在分子水平上调节卵巢癌细胞的类固醇生成,而这种调节可能是由其对类固醇生成酶的转录活性的影响而介导的。

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