title: Self-assembled combinatorial encoding nanoarrays for multiplexed biosensing.
abstract: Multiplexed and sensitive detection of nucleic acids, proteins, or other molecules from a single solution and a small amount of sample is of great demand in biomarker profiling and disease diagnostics. Here we describe a new concept using combinatorial self-assembly of DNA nanotiles into micrometer-sized two-dimensional arrays that carry nucleic acid probes and barcoded fluorescent dyes to achieve multiplexed detection. We demonstrated the specificity and sensitivity of the arrays by detecting multiple DNA sequences and aptamer binding molecules. This DNA tile-array-based sensor platform can be constructed through DNA self-assembly. The attachment of different molecular probes can be achieved by simple DNA hybridization so bioconjugation is not necessary for the labeling. Accurate control of the interprobe distances and solution-based binding reactions ensures fast target binding kinetics.
authors.affiliation: Department of Chemistry and Biochemistry & The Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA.
authors.forename: Chenxiang
authors.initials: C
authors.lastname: Lin
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Hao
authors.initials: H
authors.lastname: Yan
mesh_terms: D000818:Animals; D015374:Biosensing Techniques; D002417:Cattle; D004247:DNA / Q000097:blood / Q000235:genetics; D004867:Equipment Design; D046228:Microarray Analysis / Q000379:methods*; D036103:Nanotechnology / Q000379:methods*; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods
chemical_list: D004247:DNA