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通过拓工程的受体-连接体相互作用进行DNA框架编程的细胞捕获
Min Li1, Hongming Ding2, Meihua Lin3
1Institute of Molecular Medicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine and School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , Shanghai 200127 , China.
Journal of the American Chemical Society
|November 7, 2019
概括
研究人员使用四面体DNA框架对循环瘤细胞 (CTC) 进行了细胞表面受体-连接体相互作用的设计. 这种新的方法提高了癌细胞的检测和诊断.
科学领域:
- 生物技术
- 分子生物学
- 纳米技术
背景情况:
- 受体 - 连接体相互作用 (RLIs) 在生物学上至关重要,但由于受体的动态分布,在细胞表面是复杂的.
- 传统的钥匙锁模型不够描述这些复杂的细胞表面RLI.
研究的目的:
- 开发一个四面体DNA框架 (TDF) 编程平台,用于拓工程细胞表面RLIs.
- 通过积极招募集群受体,使循环瘤细胞 (CTC) 的高亲和性捕获成为可能.
主要方法:
- 使用TDF合成的n-simplex与1-3个向上皮细胞粘附分子 (EpCAM).
- 使用TDF顶点上的对角定为空间组织.
- 使用2个简单探针捕获CTC并评估它们的结合亲和力和对内细胞的作用.
主要成果:
- 具有3个EpCAM体的2个单体显示结合亲和度增加了约19倍.
- 工程RLIs可以防止癌细胞内细胞分裂.
- 从临床乳腺癌患者样本中获得高效率的CTC.
结论:
- 用TDF编程的平台提供了一个强大的方法来设计细胞表面RLI.
- 这种方法有助于在生理学上研究RLI.
- 该平台显示了促进癌症诊断的巨大潜力,特别是用于CTC检测.
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