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Mela, Ioanna; Vallejo‐Ramirez, Pedro P.; Makarchuk, Stanislaw; Christie, Graham; Bailey, David; Henderson, Robert M.; Sugiyama, Hiroshi; Endo, Masayuki; Kaminski, Clemens F.
Angewandte Chemie, July 27, 2020, Letnik: 59, Številka: 31Journal Article
We report the use of DNA origami nanostructures, functionalized with aptamers, as a vehicle for delivering the antibacterial enzyme lysozyme in a specific and efficient manner. We test the system against Gram‐positive (Bacillus subtilis) and Gram‐negative (Escherichia coli) targets. We use direct stochastic optical reconstruction microscopy (dSTORM) and atomic force microscopy (AFM) to characterize the DNA origami nanostructures and structured illumination microscopy (SIM) to assess the binding of the origami to the bacteria. We show that treatment with lysozyme‐functionalized origami slows bacterial growth more effectively than treatment with free lysozyme. Our study introduces DNA origami as a tool in the fight against antibiotic resistance, and our results demonstrate the specificity and efficiency of the nanostructure as a drug delivery vehicle. Antibiotic resistance is a growing health issue that is now rendering humans vulnerable once again to infections that have been treatable for decades. Various approaches have been proposed to overcome this threat and effectively treat bacterial infections. DNA nanostructures, functionalized with aptamers, were used as a vehicle for delivering the antibacterial enzyme lysozyme in a specific and efficient manner, to destroy bacterial targets.
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in: SICRIS
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