优化Aptamer的结构,以更好地诊断和治疗质瘤
Anastasia A Koshmanova1,2, Polina V Artyushenko1,2, Irina A Shchugoreva1,2
1Laboratory for Digital Controlled Drugs and Theranostics, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036 Krasnoyarsk, Russia.
Cancers
|December 17, 2024
概括
研究人员使用分子建模开发了一种较短的aptamer,用于质母细胞瘤 (GBM) 向治疗. 这种经过优化的阿普坦酶保持了结合亲和力,降低了成本,并显示了细胞透率的提高和血脑屏障穿越潜力.
科学领域:
- 生物技术和制药科学 生物技术和制药科学
- 分子生物学和遗传学
- 瘤学和癌症研究研究.
背景情况:
- 瘤疾病需要在诊断和治疗策略方面取得进展,人们对基于核酸的治疗方法越来越感兴趣.
- 长型寡核酸的生产,特别是胺,带来了重大制造挑战,影响了成本和可扩展性.
- 向疗法需要高度特定的识别分子,推动研究优化aptamer设计以提高疗效和减少副作用.
研究的目的:
- 为了证明分子建模在改变阿普坦酶序列的有效性,以提高结合能力和降低生产成本.
- 切断质母细胞瘤向性受体 (Gli-55) 的非重要区域,以创建更有效的变体 (Gli-35).
- 通过序列优化,最大限度地减少非特异性结合,并增强亚胺体的结合动态.
主要方法:
- 利用分子建模来分析Gli-55 DNA 吸收体的结构,并确定切断的非必要区域.
- 开发了一种截断的阿帕特马体,Gli-35,旨在保持原始Gli-55阿帕特马体的结构完整性和结合功能.
- 采用流式细胞计,光极化 (FP) 和共聚焦显微镜,以实验性验证阿帕特默切割的效率并评估结合特征.
主要成果:
- 分子建模证实,截断的 Gli-35 合体保持了与全长 Gli-55 合体相比较的结构完整性.
- 实验室研究表明,Gli-35与Gli-55具有类似的结合亲和力,但对质母细胞瘤的选择性增加.
- Gli-35 显示出增强的细胞内部化,并证明其能够比 Gli-55 更有效地穿越体外血脑屏障模型.
结论:
- 以分子建模为指导的截断策略为aptamer开发提供了一种资源高效的方法,特别是当详细的分子目标信息有限时.
- 像Gli-35这样的优化aptamer可以降低生产成本,并通过尽量减少序列选择中的试错来提高治疗剂的效率.
- 这种方法有助于推进向疗法的开发,包括质母细胞瘤的向疗法,通过提高aptamer性能和可制造性.
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