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Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers
Published on: September 19, 2017
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探索AS1411衍生品的G-四重复形成
Pedro Lourenço1, David Moreira2, André Miranda2
1RISE-Health, Department of Medical Sciences, Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
Molecules (Basel, Switzerland)
|May 7, 2025
概括
修改后的AS1411体表现出减少的多态性和增强的结合核 (NCL),改善细胞吸收潜在的抗癌应用. 这些G-quadruplex (G4) 胺衍生物提供了更稳定,更有效的治疗选择.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 纳米技术 纳米技术
背景情况:
- AS1411是一种针对细胞表面核素 (NCL) 的G-四重复 (G4) 受体,具有已证明的抗癌活性.
- AS1411的治疗潜力受到其高G4多态度的限制,影响其临床前应用.
研究的目的:
- 设计和评估AS1411的阿普坦衍生物与减少的G4多态.
- 评估结构修改对G4形成,稳定性,NCL结合和细胞吸收的影响.
主要方法:
- 合成6种AS1411衍生物,其中含胺替代和修改.
- 使用SEC,CD光谱和化实验进行生物物理表征.
- NCL结合亲和度测试 (K_D值),in silico结构研究,以及肺癌细胞中的细胞吸收实验.
主要成果:
- 修改后的AS1411衍生品与原始阿帕特默相比,呈现出G4多态性降低.
- 缺乏序列末端的胺和中央核心胺缺失的衍生物显示出增强的G4形成和稳定性.
- 观察到高亲和度NCL结合 (10^-9M范围),特别是对于具有中枢链接因子胺修饰的衍生物.
- 在和细胞研究中证实了NCL相互作用和特定衍生物的优异内化.
结论:
- 具有优化胺修饰的AS1411衍生物提供了减少G4多态性和改善NCL结合和细胞吸收.
- 这些发现支持改性AS1411体的开发,作为更有效的抗癌疗法.
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