在HepG2细胞中诱导VDR依赖和替代途径的表达:
Fidel Navarro-García1, Aurora E Rojas-García2, Gabriela Ávila-Villarreal3,4
1Posgrado en Ciencias Biológico Agropecuarias, Universidad Autónoma de Nayarit, Km. 9 Carretera Tepic-Compostela, Xalisco 63780, Nayarit, Mexico.
International journal of molecular sciences
|August 28, 2025
概括
维生素D的活性形式卡尔西醇增加了肝癌细胞中抗氧化酶PAROXONASE 1 (PON1) 的表达和活性. 这表明酸与PON1直接相互作用,提供了一个新的调节机制.
科学领域:
- 生物化学
- 分子生物学
- 药理学
背景情况:
- 抗氧化酶1 (PON1) 是一种具有重要的生理病理作用的抗氧化酶.
- 在分析中,PON1促进体含有核受体的反应元素,包括维生素D受体 (VDR).
- 已知VDR配体1α,25-二维生素D3 () 调节基因表达.
研究的目的:
- 研究醇对HepG2肝癌细胞中的PON1表达和活性的影响.
- 探索VDR和孕 X受体 (PXR) 在调节PON1转录中的潜在作用.
主要方法:
- 用光谱测量测量了PON1的阿里莱斯特酶 (AREase) 和乳酶 (LACase) 的活性.
- 定量实时PCR (qPCR) 评估了PON1和CYP3A4的mRNA水平.
- 使用分子建模和动力学模拟来预测相互作用.
主要成果:
- 卡尔西治疗显著诱导了HepG2细胞中的PON1mRNA水平和AREase活性.
- 分子建模表明,醇可能与PON1蛋白直接相互作用,增强其活性.
- 这些结果表明酸在PON1表达和活性上调中的作用.
结论:
- 维生素D的活性形式酸醇增强了HepG2细胞中的PON1表达和活性.
- 这项研究提出了一种涉及VDR激活和PON1转录调节的直接calcitriol-PON1相互作用的新分子机制.
- 这些发现凸显了在与PON1水平相关的疾病中的潜在治疗作用.
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