首页> 外文期刊>Nature >Cyclin D2 is an FSH-responsive gene involved in gonadal cell proliferation and oncogenesis.
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Cyclin D2 is an FSH-responsive gene involved in gonadal cell proliferation and oncogenesis.

机译:细胞周期蛋白D2是FSH反应性基因,参与性腺细胞增殖和致癌作用。

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THE D-type cyclins (D1, D2 and D3) are critical governors of the cell-cycle clock apparatus during the G1 phase of the mammalian cell cycle. These three D-type cyclins are expressed in overlapping, apparently redundant fashion in the proliferating tissues. To investigate why mammalian cells need three distinct D-type cyclins, we have generated mice bearing a disrupted cyclin D2 gene by using gene targeting in embryonic stem cells. Cyclin D2-deficient females are sterile owing to the inability of ovarian granulosa cells to proliferate normally in response to follicle-stimulating hormone (FSH), whereas mutant males display hypoplastic testes. In ovarian granulosa cells, cyclin D2 is specifically induced by FSH via a cyclic-AMP-dependent pathway, indicating that expression of the various D-type cyclins is under control of distinct intracellular signalling pathways. The hypoplasia seen in cyclin D2(-/-) ovaries and testes prompted us to examine human cancers deriving from corresponding tissues. We find that some human ovarian and testicular tumours contain high levels of cyclin D2 messenger RNA.
机译:在哺乳动物细胞周期的G1期,D型细胞周期蛋白(D1,D2和D3)是细胞周期时钟设备的关键调控器。这三种D型细胞周期蛋白在增殖组织中以重叠,显然是多余的方式表达。为了研究为什么哺乳动物细胞需要三种不同的D型细胞周期蛋白,我们通过在胚胎干细胞中使用基因靶向方法,产生了带有破坏的细胞周期蛋白D2基因的小鼠。缺乏细胞周期蛋白D2的雌性动物是不育的,因为卵巢颗粒细胞无法响应促卵泡激素(FSH)正常增殖,而突变的雄性动物则表现出发育不良的睾丸。在卵巢颗粒细胞中,FSH通过环AMP依赖性途径特异性诱导细胞周期蛋白D2的表达,这表明各种D型细胞周期蛋白的表达受不同的细胞内信号传导途径的控制。在细胞周期蛋白D2(-/-)卵巢和睾丸中看到的发育不全促使我们检查了源自相应组织的人类癌症。我们发现某些人类卵巢和睾丸肿瘤含有高水平的细胞周期蛋白D2信使RNA。

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