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Carrier-Free Hybrid DNA Nanoparticles for Light-Induced Self-Delivery of Functional Nucleic Acid Enzymes.

Leilei ShiWenbo WuYukun DuanLi XuSha LiXihui GaoJie Liu
Published in: ACS nano (2021)
Herein, we developed hybrid DNAzyme nanoparticles (NPs) to achieve light-induced carrier-free self-delivery of DNAzymes with sufficient cofactor supply and lysosome escape capacity. In this system, aggregation-induced emission (AIE) photosensitizer (PS) (TBD-Br) was grafted onto a phosphorothiolated DNAzyme backbone, which automatically self-assembled to form NPs and the surface phosphorothioate group could easily coordinate with the cofactor Zn2+ in the buffer. When the yielded hybrid DNAzyme NPs were located inside tumor cell lysosomes, the 1O2 from TBD-Br under light illumination could destroy lysosome structure and promote the Zn2+ coordinated DNAzyme NPs escape. Both in vitro and in vivo results demonstrated that the hybrid DNAzyme NPs could downregulate the early growth response factor-1 protein (EGR-1) to inhibit tumor cell growth in addition to induce tumor cell apoptosis by AIE PS (TBD-Br) under light irradiation.
Keyphrases
  • living cells
  • fluorescent probe
  • single molecule
  • nucleic acid
  • oxide nanoparticles
  • label free
  • photodynamic therapy
  • heavy metals
  • bone marrow
  • cell free
  • risk assessment
  • radiation therapy
  • amino acid
  • protein protein