Flexible DNA Nanoclaws Offer Multivalent and Powerful Spatial Pattern-Recognition for Tumor Cells.
Kang Chen1, Miao Mao2, Lian Huo2
1Department of Laboratory Medicine, Zhongshan City People's Hospital, 528403 Zhongshan, Guangdong, China.
ACS Applied Materials & Interfaces
|May 30, 2024
Summary
Flexible DNA nanoclaws with tunable aptamer spacing enhance tumor cell recognition and capture. This novel approach improves binding affinity for multivalent receptor-ligand interactions, aiding disease diagnosis and treatment.
Area of Science:
- Biotechnology
- Nanotechnology
- Molecular Biology
Background:
- Multivalent receptor-ligand interactions (RLIs) are crucial for targeting low-expression cell membrane receptors.
- Current methods lack precise control over ligand valency and spacing for complex receptor patterns.
Purpose of the Study:
- To develop DNA nanostructures with controlled aptamer spacing for enhanced cell recognition.
- To create a dual-targeting system for specific cancer biomarkers HER2 and EpCAM.
Main Methods:
- Construction of flexible DNA nanoclaws using hybrid chain reaction (HCR).
- Incorporation of multivalent aptamers with spacing-controllable binding sites.
- Validation of targeting efficiency using circulating tumor cells (CTCs).
Main Results:
- Demonstrated enhanced binding affinity of DNA nanoclaws to tumor cells.
- Achieved high capture efficiency and selectivity for CTCs.
- The flexible nanoclaw structure improved intermolecular contact with cell surfaces.
Conclusions:
- Developed a versatile DNA framework for precise control over multivalent interactions.
- The strategy shows significant potential for advancing disease diagnosis and therapeutic applications.
- Spatial pattern recognition via DNA nanostructures offers a powerful tool for cell targeting.
