理性设计的小分子向DNA和RNA,导致1型肌性损伤
Lien Nguyen1, Long M Luu1, Shaohong Peng2
1Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Mathews Avenue, Urbana, Illinois 61801, United States.
Journal of the American Chemical Society
|October 17, 2015
概括
新的多向药物为1型肌性衰竭 (DM1) 提供了希望. 这些小分子抑制有毒RNA的产生,阻断蛋白质结合,并降解RNA,在细胞和动物模型中显示出有前途.
科学领域:
- 生物化学
- 分子生物学
- 遗传学
背景情况:
- 肌性缩1型 (DM1) 病变包括DMPK基因中有毒的CTG重复扩张.
- 扩展的CUG转录 (CUG(exp)) 封存像MBNL这样的蛋白质,经历RAN转换,并调节微RNA.
研究的目的:
- 为DM1治疗设计和评估合理设计的多目标小分子.
- 通过同时针对关键分子事件来解决DM1的复杂病理生物学问题.
主要方法:
- 开发具有三种不同的作用机制的小分子:转录抑制,异常RNA-蛋白结合抑制和RNA降解.
- 在实验室中对CTG的结合 (exp),MBNL1封存的抑制和RNase-like裂变活性进行评估.
- 在DM1模型细胞和DM1Drosophila模型中评估化合物的有效性,以减少CUG和逆转表型.
主要成果:
- 这些药物在体外表现出结合CTG的能力,抑制其形成,防止MBNL1的结合,并分裂有毒RNA.
- 有效的化合物成功降低了DM1模型细胞中的CUG (exp) 水平.
- 一种化合物在DM1Drosophila模型中逆转了两个不同的CUG{exp}诱导的表型.
结论:
- 合理设计的多目标药物对DM1具有显著的治疗潜力.
- 这些药物有效地解决了DM1病理学的关键分子缺陷.
- 这些化合物的进一步开发可能会导致DM1的新疗法.
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