Abstract
Antibody microarray is a fundamental, high-content technology for analyzing biomarkers with a multiplexity even at the proteomic level. Recent advancement in this field has driven the antibody array into a new territory related with single-cell analysis. Here we describe a flow pattern-based method for producing a high-density barcode antibody microarray for the detection of proteins in fluidic samples and in single cells. The antibody microarray is fabricated by a perpendicularly oriented flow patterning of single-stranded barcode DNAs, which are then converted into DNA-antibody conjugates. Compared to conventional microarrays, this barcode antibody microarray features a simple and high-throughput assay while achieving both high sensitivity and specificity. This barcode technology provides new clues for developing next-generation antibody microarrays and can be widely used in protein biomarker discovery, cell signaling network analysis, and disease diagnosis and prognosis.
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