一种非编码RNA的设计小分子抑制剂使HER2阴性癌症对Herceptin敏感
Matthew G Costales1, Dominic G Hoch1, Daniel Abegg1
1Department of Chemistry , The Scripps Research Institute , 130 Scripps Way , Jupiter , Florida 33458 , United States.
Journal of the American Chemical Society
|February 7, 2019
概括
一种新的小分子选择性地向miR- 515以增加基酶1 (SK1) 和基酸 (S1P) 的水平,使HER2-癌细胞对像Herceptin这样的抗HER2疗法敏感.
科学领域:
- 生物化学
- 分子生物学
- 癌症研究
背景情况:
- 微RNA (miRNA) 的失调与癌症有关.
- 斯芬戈辛基因酶1 (SK1) 和斯芬戈辛1- 酸盐 (S1P) 途径的改变与癌症的进展和耐药性有关.
- HER2- 阴性 (HER2-) 癌症通常缺乏对 HER2- 向治疗的敏感性,例如Herceptin.
研究的目的:
- 设计一种选择性地向特定miRNA前体的小分子.
- 研究该分子对SK1/S1P途径和癌细胞表型的影响.
- 确定该分子是否能使HER2癌细胞对现有的向治疗产生敏感性.
主要方法:
- 设计和合成针对miR-515发针前体的二度小分子 (2).
- 基于细胞的测试以评估SK1和S1P水平,细胞迁移和蛋白质表达.
- 化学CLIP和RNA-seq用于目标定位和非目标效应评估.
- 在各种癌细胞系中对抗HER2治疗 (Herceptin) 的敏感性评估.
主要成果:
- 这种小分子 (2) 选择性地抑制了miR-515的产生,导致SK1和S1P水平的增加和细胞迁移的增强.
- 目标分析证实了化合物2与miR-515前体的选择性结合.
- 在MCF-7细胞中增加了与癌症相关的蛋白质,包括ERBB2/HER2.
- 在HERceptin的治疗中使用HER2-敏感性乳腺癌,肝细胞癌和三阴性乳腺癌细胞.
- 没有miR- 515表达的正常乳腺上皮细胞不受化合物2的影响.
结论:
- 一个新的小分子选择性地准miR-515,调节SK1/S1P通路.
- 这种方法有效地使HER2癌细胞对HER2向治疗产生敏感性,从而提供了潜在的精准医学策略.
- 这些发现表明一种方法可以扩大现有的向癌症药物的治疗效用,
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