Effects of fulvestrant on biological activity and Wnt expression in rat GH3 cells.

Effects of fulvestrant on biological activity and Wnt expression in rat GH3 cells.
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氟维司群对大鼠GH3细胞生物活性及Wnt表达的影响

DOI:
10.3969/j.issn.1673-5374.2012.04.008
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发表时间:
2012-02-05
影响因子:
6.1
通讯作者:
Zhang Y
Zhang Y
中科院分区:
医学2区
文献类型:
--
作者:
Bai J;Wang Y;Li C;Zhang Y

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本研究探讨了抗雌激素治疗(氟维司群)对垂体腺瘤细胞系 GH3 生物活性、雌激素受体 α 通路、WnT 通路的影响以及 GH3 细胞中 Wnt 抑制因子-1 表达减少的机制。结果表明,氟维司群以剂量依赖性方式抑制 GH3 细胞增殖并减少激素分泌。氟维司群治疗后雌激素受体α和Wnt4表达减少,但Wnt抑制因子1表达以剂量依赖性方式增加,而β-连环蛋白表达保持不变。 DNA 甲基化和组蛋白修饰的抑制剂上调 Wnt 抑制因子-1 的表达。结果表明,氟维司群通过雌激素受体α和Wnt途径抑制GH3细胞的生物活性。这些结果表明 GH3 细胞中 Wnt 抑制因子 1 表达的减少在表观遗传机制中发挥了作用。抗雌激素疗法可以为生长激素腺瘤提供新的治疗方法。
The present study investigated the influence of anti-estrogen treatment (fulvestrant) on pituitary adenoma cell line GH3 biological activity, the estrogen receptor α pathway, the WnT pathway, and mechanisms of decreased Wnt inhibitory factor-1 expression in GH3 cells. Results showed that fulvestrant suppressed GH3 cell proliferation and reduced hormone secretion in a dose-dependent manner. Estrogen receptor α and Wnt4 expression decreased, but Wnt inhibitory factor-1 expression increased in a dose-dependent manner following fulvestrant treatment, and β-catenin expression remained unchanged. Inhibitors of DNA methylation and histone modification upregulated Wnt inhibitory factor-1 expression. Results suggested that fulvestrant suppressed biological activity of GH3 cells via the estrogen receptor α and Wnt pathways. These results suggested that decreased Wnt inhibitory factor-1 expression in GH3 cells played a role in epigenetic mechanisms. Anti-estrogen therapies could provide novel treatments for growth hormone adenomas.
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