强效和选择性的人类构成性安德罗斯坦受体激活器DL5055促进基于环胺的化疗
Dongdong Liang1, Linhao Li1, Yong Ai1
1Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States.
开发出新的化合物来激活人类构成性安德罗斯坦受体 (hCAR),增强环胺 (CPA) 的代谢转化. 化合物DL5055显著提升了CPA.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药物新陈代谢 药物新陈代谢
- 分子生物学分子生物学
背景情况:
- 循环胺 (CPA) 的代谢激活对其治疗疗效至关重要.
- 人体构成性安德罗斯坦受体 (hCAR) 调节CYP2B6,这是CPA生物激活中的关键酶.
- 开发强大的hCAR激活剂可以增强CPA的抗癌作用.
研究的目的:
- 设计和合成具有提高功效的新型hCAR激活剂.
- 评估新化合物在增强CPA代谢和抗癌活性方面的有效性.
- 为了研究最强大的hCAR激活剂的作用机制.
主要方法:
- 基于DL5016.16的新型hCAR激活剂的化学合成.
- 在体外测试测量hCAR激活强度 (EC50,EMAX) 和对相关核受体的选择性.
- 用人类初级肝细胞和hCAR转基因小鼠进行实验,以评估CYP2B6诱导和hCAR转位.
- 在培养系统和活体老鼠异种移植模型中提高CPA疗效的评估.
主要成果:
- 与DL5016.相比,三个新的化合物 (6i,6k/DL5055,7e) 显示出明显增强的hCAR激活功效.
- 在没有激活hPXR的情况下,DL5055表现出强有力的和选择性的hCAR激活 (EC50 = 0.35μM,EMAX = 4.3) .
- 在肝细胞中,DL5055诱导了CYP2B6表达和hCAR核转位,在小鼠中诱导了Cyp2b10.
- 在体外和体内,DL5055显著提高了基于环胺的化疗 (CHOP) 的疗效.
结论:
- 新的hCAR激活剂,特别是DL5055,已经成功开发出来.
- DL5055选择性地和强烈地激活hCAR,导致CYP2B6表达的增加.
- DL5055增强了循环胺化疗的治疗效果,为癌症治疗提供了一个有前途的策略.
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