期刊
ACS NANO
卷 13, 期 5, 页码 5959-5967出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b01857
关键词
DNA nanotechnology; DNA origami; pH control; Forster resonance energy transfer; nanoparticles; enzymes; drug delivery
类别
资金
- Academy of Finland [286845, 308578, 303804, 267497]
- Jane and Aatos Erkko Foundation
- Sigrid Juselius Foundation
- Academy of Finland (AKA) [303804, 303804] Funding Source: Academy of Finland (AKA)
DNA nanotechnology provides a toolbox for creating custom and precise nanostructures with nanometer-level accuracy. These nano-objects are often static by nature and serve as versatile templates for assembling various molecular components in a user-defined way. In addition to the static structures, the intrinsic programmability of DNA nanostructures allows the design of dynamic devices that can perform predefined tasks when triggered with external stimuli, such as drug delivery vehicles whose cargo display or release can be triggered with a specified physical or chemical cue in the biological environment. Here, we present a DNA origami nanocapsule that can be loaded with cargo and reversibly opened and closed by changing the pH of the surrounding solution. Moreover, the threshold pH value for opening/closing can be rationally designed. We characterize the reversible switching and a rapid opening of pH-latch-equipped nanocapsules using Forster resonance energy transfer. Furthermore, we demonstrate the full cycle of capsule loading, encapsulation, and displaying the payload using metal nanoparticles and functional enzymes as cargo mimics at physiologically relevant ion concentrations.
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