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孕妇X受体通过降低质素表达的调节来抑制肝星细胞的转基因分化
Takumi Sato1, Ryota Shizu1, Ryonosuke Baba1
1Laboratory of Molecular Toxicology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526 Japan.
The Biochemical journal
|August 22, 2024
概括
肝星细胞中的孕妇X受体 (PXR) 激活通过抑制POSTN,细胞转基因的关键因素,抑制肝癌的上皮细胞-介质细胞过渡 (EMT).
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 孕妇X受体 (PXR) 是一个参与药物代谢的核受体,并且已经显示出减轻肝癌发展的潜力.
- 之前已经观察到PXR在抑制肝癌细胞上皮质-介质细胞转换 (EMT) 的作用.
- 在肝星细胞 (HSC) 中PXR的特定作用,肝细胞癌 (HCC) 瘤微环境的关键组成部分,仍然需要阐明.
研究的目的:
- 为了研究PXR在肝星细胞 (HSC) 中的功能,关于肝癌中的上皮-介质细胞转换 (EMT).
- 确定HSC中的PXR激活是否可以调节瘤微环境并影响肝癌的进展.
主要方法:
- 人类HSC衍生的LX-2细胞被设计成稳定地表达人类PXR (hPXR-LX2细胞).
- 肝癌HepG2细胞与hPXR-LX2细胞共同培养,或从hPXR-LX2细胞中用条件介质 (CM) 处理.
- 报告员测定,形态分析和mRNA/蛋白质水平测量被用于评估EMT和转差标志物,包括VIM,COL1A1,FN1和POSTN.
主要成果:
- 在hPXR-LX2细胞中的PXR激活,由Shield-1和利芬素诱导,减弱了TGF-β1诱导的HSC转差.
- 激活PXR抑制了转化分化标记物 (COL1A1,FN1) 和关键因子POSTN在HSC中的表达.
- 发现PXR可以抑制NF-κB介导的POSTN转录,再组合POSTN可以恢复PXR介导的HSC转差抑制.
结论:
- 肝星细胞中的PXR激活通过降低POSTN表达的调节来抑制它们的转分化.
- 这种PXR介导的HSC转分化的抑制预计会抑制肝癌细胞中的EMT.
- 准HSC中的PXR代表了对抗肝细胞癌进展的潜在治疗策略.
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