Size-Controllable and Self-Assembled DNA Nanosphere for Amplified MicroRNA Imaging through ATP-Fueled Cyclic Dissociation.
Jiaoli WangJuan LiYu ChenRuiting LiuYixuan WuJianbo LiuXiaohai YangKemin WangJin HuangPublished in: Nano letters (2022)
Visualizing intracellular microRNA (miRNA) is of great importance for revealing its roles in the development of disease. However, cell membrane barrier, complex intracellular environment and low abundance of target miRNA are three main challenges for efficient imaging of intracellular miRNA. Here, we report a size-controllable and self-assembled DNA nanosphere with ATP-fueled dissociation property for amplified miRNA imaging in live cells and mice. The DNA nanosphere was self-assembled from Y-shaped DNA (Y-DNA) monomers through predesigned base pair hybridization, and the size could be easily controlled by varying the concentration of Y-DNA. Once the nanosphere was internalized into cells, the intracellular specific target miRNA would trigger the cyclic dissociation of the DNA nanosphere driven by ATP, resulting in amplified FRET signal. The programmable DNA nanosphere has been proven to work well for detecting the expression of miRNA in cancer cells and in mice, which demonstrates its fairish cell penetration, stability and sensitivity.
Keyphrases
- circulating tumor
- single molecule
- cell free
- nucleic acid
- high resolution
- induced apoptosis
- type diabetes
- reactive oxygen species
- poor prognosis
- mass spectrometry
- single cell
- cell proliferation
- cell therapy
- wastewater treatment
- long non coding rna
- signaling pathway
- photodynamic therapy
- binding protein
- electron transfer