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Poly-Adenine-Based Spherical Nucleic Acids for Efficient Live-Cell MicroRNA Capture.
Kai Jiao1,2, Qinglong Yan1,2, Linjie Guo1,2
1Division of Physical Biology, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.
Angewandte Chemie (International Ed. in English)
|April 14, 2021
Summary
Researchers developed poly-adenine-based spherical nucleic acids (polyA-SNAs) for enhanced delivery of nucleic acids into cells. These polyA-SNAs efficiently capture oncogenic microRNAs (miRNAs), suppressing tumor growth in vivo.
Area of Science:
- Biotechnology
- Molecular Biology
- Nanotechnology
Background:
- Direct delivery of nucleic acids into cells is crucial for biological applications.
- Current methods face challenges in cell entry efficiency and target capture.
Purpose of the Study:
- To develop a novel method for efficient capture of oncogenic microRNAs (miRNAs) in living cells.
- To engineer poly-adenine-based spherical nucleic acids (polyA-SNAs) for improved nucleic acid delivery and miRNA sponging.
Main Methods:
- Compartmentalizing anti-miRNA sequences on the surface of polyA-SNAs.
- Programming polyA length to control spatial configuration of anti-miRNA sequences.
- Evaluating cell entry efficiency and miRNA binding affinity of polyA-SNAs.
Main Results:
- PolyA-SNAs demonstrated high cell entry efficiency, independent of anti-miRNA sequence arrangement.
- Engineered spatial configuration of anti-miRNA sequences enhanced miRNA capture ability compared to compacted SNAs.
- PolyA-SNAs effectively captured oncogenic miRNAs in vitro and in vivo, leading to significant tumor growth suppression.
Conclusions:
- PolyA-SNAs offer a promising platform for efficient nucleic acid delivery and miRNA sponging.
- This approach enables effective inhibition of oncogenic miRNAs, presenting a potential therapeutic strategy for cancer treatment.
