RNA silencing nanozymes
    1.
    发明授权

    公开(公告)号:US12116603B2

    公开(公告)日:2024-10-15

    申请号:US17091735

    申请日:2020-11-06

    Abstract: Disclosed herein are improved nanozymes for targeting RNA. The disclosed nanozymes are synthesized using recombinant RNase A with site-specific cysteine-substituted mutations that can be covalently functionalized with a length-tunable multi-thiol tether and then loaded onto gold particles through multiple gold-sulfur bonds. This new RNase A loading mechanism is site specific, and it allows high-density loading of alkylthiol modified DNA oligonucleotides. The disclosed nanozymes can also include additional capturer strands and/or involve DNA-recombinant-RNase-A unibodies to further increase the nanozyme's enzymatic activity and target selectivity. Also disclosed are functional on-off switchable nanozymes to control nanozyme activity. In some embodiments, the disclosed nanozyme are core-free hollow forms. The removal of the inorganic nanoparticle cores from nanozymes can effectively eliminate the potential long-term toxicity induced by the core, and also creates a cavity for loading and delivery of small molecule drugs.

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