title: Stability of DNA origami nanoarrays in cell lysate.
abstract: Scaffolded DNA origami, a method to create self-assembled nanostructures with spatially addressable features, has recently been used to develop water-soluble molecular chips for label-free RNA detection, platforms for deterministic protein positioning, and single molecule reaction observatories. These applications highlight the possibility of exploiting the unique properties and biocompatibility of DNA nanostructures in live, cellular systems. Herein, we assembled several DNA origami nanostructures of differing shape, size and probes, and investigated their interaction with lysate obtained from various normal and cancerous cell lines. We separated and analyzed the origami-lysate mixtures using agarose gel electrophoresis and recovered the DNA structures for functional assay and subsequent microscopic examination. Our results demonstrate that DNA origami nanostructures are stable in cell lysate and can be easily separated from lysate mixtures, in contrast to natural, single- and double-stranded DNA. Atomic force microscope (AFM) and transmission electron microscope (TEM) images show that the DNA origami structures are fully intact after separation from cell lysates and hybridize to their targets, verifying the superior structural integrity and functionality of self-assembled DNA origami nanostructures relative to conventional oligonucleotides. The stability and functionality of DNA origami structures in cell lysate validate their use for biological applications, for example, as programmable molecular rafts or disease detection platforms.
authors.affiliation: Center for Biosignatures Discovery Automation, Arizona State University, Tempe, Arizona 85287, United States.
authors.forename: Qian
authors.initials: Q
authors.lastname: Mei
authors.forename: Xixi
authors.initials: X
authors.lastname: Wei
authors.forename: Fengyu
authors.initials: F
authors.lastname: Su
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Cody
authors.initials: C
authors.lastname: Youngbull
authors.forename: Roger
authors.initials: R
authors.lastname: Johnson
authors.forename: Stuart
authors.initials: S
authors.lastname: Lindsay
authors.forename: Hao
authors.initials: H
authors.lastname: Yan
authors.forename: Deirdre
authors.initials: D
authors.lastname: Meldrum
mesh_terms: D002474:Cell-Free System / Q000737:chemistry*; D004247:DNA / Q000737:chemistry* / Q000648:ultrastructure*; D006801:Humans; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size
chemical_list: D004247:DNA