通过结构向性联体对瘤性微RNA 17-92 集群进行向性降解
Xiaohui Liu1, Hafeez S Haniff1, Jessica L Childs-Disney1
1Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States.
Journal of the American Chemical Society
|April 3, 2020
概括
研究人员开发了新的RNA向化合物来抑制microRNA-17-92集群, 作为癌症等疾病的关键参与者. 这些化合物在临床前模型中选择性地降低了与疾病相关的microRNA水平并挽救了表型.
科学领域:
- 分子生物学
- 有关RNA疗法
- 医学化学
背景情况:
- 异常的RNA表达有助于疾病.
- 微RNA-17-92 (pri-miR-17-92) 集群与各种疾病有关.
- 针对miRNA生物生成提供了一种治疗策略.
研究的目的:
- 设计针对pri-miR-17-92集群的特定序列连体.
- 抑制集群内的特定miRNAs的生物发生.
- 开发用于治疗的RNA向化合物.
主要方法:
- 基于结构特异性的RNA配体的设计.
- 将连接物优化为二次分子以增强结合.
- 对白素A5的联结或对核糖核酶向基因组 (RIBOTACs) 的发展.
- 在疾病模型中评估化合物的疗效.
主要成果:
- 开发了一种针对miR-17,miR-18a和miR-20a的Dicer处理位点的二元分子,其效率增加了100倍.
- 这种合物分裂了整个pri- miR-17-92集群,抑制了所有六种miRNA.
- 在多囊病,前列腺癌和乳腺癌模型中选择性降低pri-miR-17-92水平并拯救疾病表型.
- 在前列腺癌细胞中显示出选择性的miRNome和proteome效应.
- RIBOTAC选择性地消耗了预先和成熟的miRNA,但并没有减少主要的转录.
结论:
- 针对RNA结构的化合物可以调整为特定的治疗效果.
- 针对pri-miR-17-92集群是治疗相关疾病的可行策略.
- 开发的化合物显示出选择性RNA分裂和治疗干预的潜力.
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