ncBAF增强了人类和小鼠肝脏中PXR介导的转录激活
Kiamu Kurosawa1, Masataka Nakano2, Itsuki Yokoseki1
1Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
Biochemical pharmacology
|August 5, 2023
概括
含有蛋白9 (BRD9) 的布罗姆多马因与Pregnane X受体 (PXR) 相互作用,增强其活性. 用iBRD9抑制BRD9可以减少PXR介导的不良药物反应,如药物相互作用和肝脏问题.
科学领域:
- 药理学和毒理学 药理学和毒理学
- 分子生物学分子生物学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 孕妇X受体 (PXR) 调节药物代谢,葡萄糖生成和脂质合成.
- 药物激活PXR可以导致药物相互作用,高血糖和脂质失调等不良影响.
- 抑制PXR激活是防止这些不良事件的潜在策略.
研究的目的:
- 为了研究含有蛋白9 (BRD9) 和PXR.bromodomain之间的相互作用.
- 为了确定BRD9是否影响PXR介导的转录激活.
- 评估BRD9抑制在缓解PXR相关药物不良反应方面的治疗潜力.
主要方法:
- 同免疫沉测试检测PXR-BRD9相互作用.
- 使用人类原发性肝细胞的体外研究和使用CYP3A/PXR人性化小鼠的体内研究.
- 染色体免疫沉 (ChIP) 试验用于评估PXR与CYP3A4促进体的结合.
- 在接受 efavirenz 和 iBRD9.9 治疗的小鼠中评估肝脂积累.
主要成果:
- BRD9被确定为PXR.的交互伙伴.
- 在肝细胞和小鼠中使用iBRD9减弱的里芬素诱导的CYP3A4表达的BRD9抑制.
- iBRD9减少了PXR与CYP3A4促进体的结合,表明BRD9促进了PXR的交换活化.
- 在小鼠中,iBRD9缓解了埃法维伦兹诱导的肝脂积累.
结论:
- 作为非正规BAF (ncBAF) 染色体重塑复合物的组成部分,BRD9在PXR介导的基因转录中起着至关重要的作用.
- BRD9促进了PXR与其反应元素的结合,从而增强了PXR的活动.
- 像iBRD9这样的BRD9抑制剂代表了一种有希望的治疗策略,以减少与PXR激活相关的不良药物反应的风险.
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