Abstract
One major challenge of using DNA nanostructures for cellular and in vivo applications is their insufficiently structural integrity that stems from the non-covalent base pairing and stacking in complex cellular and physiological environment. The establishment of covalent bonds in DNA nanostructures can link individual strands more stably and therefore should improve the performance of DNA nanostructures in different scenarios where structural integrity is required. Here, we developed a convenient and effective method for constructing covalently stabilized DNA nanostructures by chemically inserting photo-cross-linker (CNVK) in DNA sequences. These covalently linked DNA nanostructures were found to be more resistant to external interference, such as low cation concentrations and unspecific displacement on cell membranes. We also demonstrated that our strategy could improve the efficiency of cell surface receptor-mediated labeling and function regulations in living cells, which sheds light on broadening the biomedical applications of DNA nanostructures.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (2021YFA0909400), the National Natural Science Foundation of China (21974087, 81974315), Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant Support (20181709), Shanghai Rising-Star Program (20QA1405800), and the General Projects of China Postdoctoral Fund (2021M692104). Innovative Research Team of High-Level Local Universities in Shanghai, faculty start-up funding support from the Institute of Molecular Medicine of Shanghai Jiao Tong University, and Recruitment Program of Global Youth Experts of China.
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Covalent stabilization of DNA nanostructures on cell membranes for efficient surface receptor-mediated labeling and function regulations
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Chao, D., Xu, X., Miao, Y. et al. Covalent stabilization of DNA nanostructures on cell membranes for efficient surface receptor-mediated labeling and function regulations. Sci. China Chem. 65, 2327–2334 (2022). https://doi.org/10.1007/s11426-022-1413-5
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DOI: https://doi.org/10.1007/s11426-022-1413-5