题名痛舒胶囊抑制乳腺上皮细胞增殖的机制研究
作者杜成志
学位类别硕士
答辩日期2013-05
授予单位中国科学院研究生院
授予地点北京
导师陈策实
关键词痛舒胶囊 乳腺增生 雌激素受体 细胞增殖 细胞周期 Cyclin D1
其他题名Mechanism of Tongshu Capsule Inhibiting the Proliferation of Mammary Epithelial Cells
学位专业生物工程
中文摘要乳癌增生症是女性中最常见的乳房疾病,占全部乳房疾病的75%左右,严重影响了女性身心健康,而且其发病率有逐年上升的趋势。乳腺增生症是乳腺组织的良性增生性疾病,其增生主要发生在乳腺上皮细胞。目前大量研究显示乳腺增生患者体内雌激素水平和ERα的表达升高是乳腺增生症的主要病因之一。痛舒胶囊是我国一种传统的中药复方,其在治疗乳腺增生症上具有良好的效果,但是其机制并不清楚。 为了阐明痛舒胶囊治疗乳腺增生症的机制,本文首先从细胞水平对痛舒胶囊抑制乳腺上皮细胞增殖的机制进行了研究。生长实验显示痛舒胶囊对ERα+的乳腺癌上皮细胞MCF7和T47D表现出了较强的生长抑制作用,而这种生长抑制作用是通过抑制细胞增殖实现的,进一步研究表明痛舒胶囊主要是抑制了G1/G0-S期的进程。接下来我们对痛舒胶囊抑制乳腺上皮细胞增殖的分子机制进行了探究。免疫印迹结果显示痛舒胶囊可以下调ERα及其下游靶基因Cyclin D1的表达,而Cyclin D1是在G1/G0-S期的进程中起关键作用的蛋白。随后我们检测了痛舒胶囊对雌激素受体信号通路的影响,发现痛舒胶囊可以抑制E2对其下游靶基因表达的上调。与此相一致的是,痛舒胶囊抑制E2对细胞周期和生长的刺激作用。 通过以上研究我们证实,痛舒胶囊可以下调ERα表达,进而对雌激素信号通路产生抑制,并抑制其下游靶基因如Cyclin D1的表达,进而抑制乳腺上皮细胞的细胞周期进程,达到抑制乳腺上皮细胞增殖的作用。我们的研究还提示痛舒胶囊可能对ERα阳性的乳腺癌有治疗作用。这项研究基本解析了痛舒胶囊治疗乳腺增生的可能机制,为拓展痛舒胶囊的用途奠定了基础。
英文摘要Mammary hyperplasia is the most common breast disease in women, accounting for 75% of all breast diseases, which seriously affects the women's health, and the trend of incidence is rising in recent years. Mammary hyperplasia is the benign hyperplastic disease of the breast tissue, mainly occurs in mammary epithelial cells. Accumulated evidence suggests that mammary hyperplasia is caused by high levels of estrogen and ERα. Tongshu capsule, a traditional Chinese medicine that widely used in China, has remarkable effects on treating mammary gland hyperplasia. However, the mechanism is unclear. To understand the mechanism, we investigated how Tongshu capsule inhibits the proliferation of mammary epithelial cells . We showed that Tongshu capsule has stronger growth inhibition on ERα positive MCF7 and T47D breast cancer cell lines. Tongshu capsule inhibited the cell cycle G1/G0 -S transition . Interestingly, Tongshu capsule down-regulated the expression of ERα and its downstream target gene Cyclin D1, which plays an important role in G1/G0 -S transition. Following that, we found Tongshu capsule suppressed E2 mediated downstream gene expression and cell proliferation. In summary, Tongshu capsule inhibited mammary epithelial cells proliferation through down-regulation of ERα expression. Our findings further suggest that Tongshu capsule may have therapeutic effect on ERα positive breast cancers.
语种中文
公开日期2013-07-17
内容类型学位论文
源URL[http://159.226.149.42:8088/handle/152453/7572]  
专题昆明动物研究所_肿瘤生物学
推荐引用方式
GB/T 7714
杜成志. 痛舒胶囊抑制乳腺上皮细胞增殖的机制研究[D]. 北京. 中国科学院研究生院. 2013.
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