细胞内膜网膜的压力依赖的调节碳氧酶E在质母细胞细胞表达的表达
Oleksandr H Minchenko1, Anastasiia I Abramchuk1, Olena O Khita1
1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine.
Endocrine regulations
|October 1, 2024
概括
在质母细胞瘤中,抑制ERN1激酶活性可上调碳氧酶E (CPE). 这种增加的CPE表达可能有助于ERN1 knockdown诱导的质母细胞瘤细胞侵入性.
科学领域:
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 碳氧酶E (CPE) 对神经递质和激素生物合成至关重要,促进瘤细胞的增殖,存活和入侵.
- 质母细胞瘤的生长受体内膜网膜 (ER) 压力,缺氧和营养物质的可用性影响.
- 已经证明,ERN1 (ER到核信号1) 的敲击抑制了质母细胞瘤的扩散,并增强了侵入性.
研究的目的:
- 调查ERN1倒置,缺氧和葡萄糖/谷氨酸缺乏如何调节U87MG质母细胞细胞中CPE基因表达.
- 阐明ERN1信号在CPE基因表达中的作用及其在瘤发生中的功能.
主要方法:
- 使用了空载体 (对照) 的U87MG质母细胞,ERN1淘汰 (dnERN1) 和抑制的ERN1内核核酶 (dnrERN1).
- 低氧被诱导使用二甲基糖.
- 通过在DMEM中培养缺少这些营养素16小时的细胞来实现葡萄糖或谷氨酸剥夺.
- 使用RT-PCR量化CPE基因表达,并将其正常化为ACTB.
主要成果:
- 抑制ERN1的内核核酶和蛋白质激酶活动显著提高了质母细胞瘤细胞中CPE基因表达的调节.
- 沉默ERN1也增加了CPE表达,而仅抑制内啡核糖酶活性没有显著的影响.
- 在对照细胞中,CPE表达对低氧有抵抗力,但在ERN1敲击下增加.
- 谷氨酸缺乏在对照细胞中提高了CPE的调节,但通过ERN1敲击降低了CPE.
- 缺乏葡萄糖在两种细胞类型中降低了CPE表达,这种效应被ERN1抑制放大.
结论:
- 抑制ERN1通过其蛋白激酶活性强烈上调亲瘤性CPE基因.
- 增高的CPE表达可能有助于在ERN1敲击下质母细胞细胞中观察到的增强的侵入性.
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