Parallel barcoding of antibodies for DNA-assisted proteomics.

Dezfouli M, Vickovic S, Iglesias MJ, Schwenk JM, Ahmadian A

Proteomics 14 (21-22) 2432-2436 [2014-11-00; online 2014-09-30]

DNA-assisted proteomics technologies enable ultra-sensitive measurements in multiplex format using DNA-barcoded affinity reagents. Although numerous antibodies are available, nowadays targeting nearly the complete human proteome, the majority is not accessible at the quantity, concentration, or purity recommended for most bio-conjugation protocols. Here, we introduce a magnetic bead-assisted DNA-barcoding approach, applicable for several antibodies in parallel, as well as reducing required reagents quantities up to a thousand-fold. The success of DNA-barcoding and retained functionality of antibodies were demonstrated in sandwich immunoassays and standard quantitative Immuno-PCR assays. Specific DNA-barcoding of antibodies for multiplex applications was presented on suspension bead arrays with read-out on a massively parallel sequencing platform in a procedure denoted Immuno-Sequencing. Conclusively, human plasma samples were analyzed to indicate the functionality of barcoded antibodies in intended proteomics applications.

NGI Stockholm (Genomics Applications)

NGI Stockholm (Genomics Production)

Plasma Profiling [Technology development]

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PubMed 25263329

DOI 10.1002/pmic.201400215

Crossref 10.1002/pmic.201400215