反感性寡核酸的组织药理学
Erica Bäckström1, Alessandro Bonetti2, Per Johnsson2
1Drug Metabolism and Pharmacokinetics, Research and Early Development, Respiratory & Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, 431 83 Gothenburg, Sweden.
Molecular therapy. Nucleic acids
|February 29, 2024
概括
反感性寡核酸 (ASOs) 呈现出快速的组织分布和缓慢的消除. 这项研究量化了ASO的药理动力学和RNA在组织,途径和化学物质中的敲除,有助于药物发现.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药物发现 药物发现 药物发现
- 分子生物学分子生物学
背景情况:
- 反感性寡核酸 (ASOs) 是一个有前途的治疗方式.
- 了解组织药理动力学 (PK) 和RNA淘汰对于ASO药物开发至关重要.
- 目前关于ASO化学,结合和给药途径如何影响组织PK和疗效的知识有限.
研究的目的:
- 在皮下和肌内注射后,在小鼠组织中表征锁定核酸 (LNA) gapmer ASO的度-时间概况和RNA敲除.
- 为了评估向肝脏的银胺合物对ASO PK和淘汰的影响.
- 为了比较不同ASO核糖酶化学物质 (LNA,cEt,2'-MOE) 的组织PK,并研究依赖序列的PK变异.
主要方法:
- 用LC-MS/MS.对小鼠肝脏,脏,心脏和肺部中ASO度的定量分析.
- 通过RT-qPCR测量目标RNA的淘汰.
- 通过皮下和肌内途径给药ASOs.
- 评估不同的ASO化学物质和一个银胺合物.
主要成果:
- 根据给药途径和结合策略,组织暴露和RNA敲击有显著的变化.
- 组织PK概况在LNA,cEt和2'-MOE化学结构中是相似的.
- 在小鼠肝脏中的ASO半衰期显示了潜在的序列依赖性.
- 肝脏度的增加在3-30μmol/kg之间不及剂量比例.
结论:
- 施用途径和结合极大地影响ASO组织分布,暴露和疗效.
- 不同的ASO核糖酶化学表现出可比的组织PK配置文件.
- 这些发现为优化ASO设计和解释体内研究提供了必要的数据,促进ASO治疗的发展.
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