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首页> 外文期刊>Journal of Cellular Physiology >Thyroid hormones induce cell proliferation and survival in ovarian granulosa cells COV434.
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Thyroid hormones induce cell proliferation and survival in ovarian granulosa cells COV434.

机译:甲状腺激素诱导细胞增殖和在卵巢颗粒细胞生存COV434。

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Numerous evidences indicate that thyroid hormones exert an important role in the regulation of the reproductive system in the adult female. Although a clear demonstration of the thyroid-ovarian interaction is still lacking, it is conceivable that thyroid hormones might have a direct role in ovarian physiology via receptors in granulosa cells. In this study we analyzed if thyroid hormone treatment could affect cell proliferation and survival of COV434 cells. To this aim cell growth experiments and cell cycle analyses by flow cytometry were performed. Secondly the T(3) survival action was tested by TUNEL assay and MD30 cleavage analysis. We showed that T(3), and not T(4), can protect ovarian granulosa cells COV434 from apoptosis, regulating cell cycle and growth in the same cells. The increase in cell growth resulted in an augmented percentage of the cells in the S phase and, in a reduction of the doubling time (18%). Subsequently apoptotic pathway induced by serum deprivation has been evaluated in the cells exposed or not to thyroid hormone treatment. The T(3) treatment was able to remarkably counteract the apoptotic process. Even at the ultrastructural level there was an evident protective effect of T(3) in the cells that, besides the maintenance of the original morphology and, the absence of basophilic cytoplasm, conserved normal junctional areas. Furthermore, the protective T(3) effect evaluated by FACS analysis in the presence of a PI3K inhibitor revealed, as also confirmed by Western Blot on pAkt, that the PI3K pathway is crucial in T(3) survival action.
机译:众多证据表明甲状腺激素发挥监管的一个重要的角色在成年女性生殖系统。一个清晰的thyroid-ovarian的示范仍然缺乏互动,可想而知甲状腺激素可能有直接作用在颗粒通过受体卵巢生理细胞。激素治疗可能影响细胞增殖和COV434细胞的生存。生长实验和细胞周期分析流式细胞术进行。生存行动被TUNEL分析和测试MD30乳沟分析。不是T(4),可以保护卵巢颗粒细胞COV434从细胞凋亡,调节细胞周期和同一细胞的增长。经济增长导致一个增广的百分比细胞S期,减少的倍增时间(18%)。通路引起血清剥夺评估甲状腺细胞暴露与否激素治疗。明显对抗凋亡过程。在超微结构水平有一个明显保护作用的T细胞(3),除了最初的维护形态学,嗜碱的缺失细胞质,守恒的正常的交界地区。此外,保护T(3)效果评估通过流式细胞仪分析PI3K的存在抑制剂透露,也证实了西方污点pAkt, PI3K通路是至关重要的T(3)生存行动。

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