JCEM:雌激素影响结直肠癌进展的机制或与G蛋白偶联受体的增殖有关

2017-09-29 MedSci MedSci原创

背景:尽管目前缺乏精确的分子机制,但雌激素能影响结直肠癌的发生和发展。目的:本研究旨在探讨雌激素代谢的前受体——人类CRC组织、TCGA Coad数据集、体内外的CRC模型研究中的类固醇硫酸酯酶(STS)和17β-羟类固醇脱氢酶的活性,及随后的非基因组雌激素信号,以及确定和哪种雌激素能改变CRC增殖和进展和其治疗的靶向通路。设计、设置、患者和干预:研究人员从绝经后妇女和根据年龄匹配的男性患者中,收

背景:尽管目前缺乏精确的分子机制,但雌激素能影响结直肠癌的发生和发展。

目的:本研究旨在探讨雌激素代谢的前受体——人类CRC组织、TCGA Coad数据集、体内外的CRC模型研究中的类固醇硫酸酯酶(STS)和17β-羟类固醇脱氢酶的活性,及随后的非基因组雌激素信号,以及确定和哪种雌激素能改变CRC增殖和进展和其治疗的靶向通路。

设计、设置、患者和干预:研究人员从绝经后妇女和根据年龄匹配的男性患者中,收集了人结直肠癌样本及匹配的结直肠正常样本。研究人员测定了雌激素代谢酶和非基因的下游信号转导通路。研究人员使用STS转染的结直肠癌细胞系进行体外培养,以及体内分析。研究人员使用新的超高效液相色谱串联质谱法测定雌激素代谢。

主要结果测量:在异种移植的CRC小鼠中,用BrdU检测法评估雌激素代谢的增殖作用。

结果:人类结直肠癌对雌激素代谢的调节异常,这有利于雌二醇的合成。类固醇硫酸酯酶(STS)是共轭激活雌激素的基本酶,与对照组相比,人CRC样本中它的活性明显升高(P<0.001)。STS过度表达加速了体外和体内的CRC增殖,STS抑制是一种有效的治疗方法。在CRC中,根据结缔组织生长因子(CTGF),研究人员确定了一个G蛋白偶联受体(GPER)增殖的前通路。

结论:人类结直肠癌通过GPER刺激有利于雌二醇合成和增殖。未来需要进一步研究在治疗高危结直肠癌患者时,是否应谨慎使用雌激素替代疗法。

原始出处:

Gilligan LC, Rahman HP,et al.Estrogen Activation by Steroid Sulfatase increases Colorectal Cancer proliferation via GPER.J Clin Endocrinol Metab. 2017 Sep 13. doi: 10.1210/jc.2016-3716. [Epub ahead of print]

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    2018-08-23 achengzhao
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    2018-02-20 smallant2015
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    2017-10-01 大爰

    学习了谢谢分享!!

    0

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    2017-09-30 yfjms

    学习了

    0

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Int J Cancer:第二次欧洲筛查报告——欧盟成员国癌症筛查的实施和管理情况

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自噬是一种高度保守的代谢过程,表现为细胞对不正常的或不需要的细胞成分的“自食”。自噬在癌症转移中扮演著着重要的角色,而转移性疾病是结直肠癌导致相关死亡的主要原因。

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