Jump to main content
Jump to site search

Issue 5-6, 2009
Previous Article Next Article

Microparticle encoding technologies for high-throughput multiplexed suspension assays

Author affiliations


The requirement for analysis of large numbers of biomolecules for drug discovery and clinical diagnostics has driven the development of low-cost, flexible and high-throughput methods for simultaneous detection of multiple molecular targets in a single sample (multiplexed analysis). The technique that seems most likely to satisfy all of these requirements is the multiplexed suspension (bead-based) assay, which offers a number of advantages over alternative approaches such as ELISAs and microarrays. In a bead based assay, different probe molecules are attached to different beads (of a few tens of microns in size), which are then reacted in suspension with the target sample. After reaction, the beads must be identifiable in order to determine the attached probe molecule, and thus each bead must be labelled (encoded) with a unique identifier. A large number of techniques have been proposed for encoding beads. This critical review analyses each technology on the basis of its ability to fulfil the practical requirements of assays, whilst being compatible with low-cost, high-throughput manufacturing processes and high-throughput detection methods. As a result, we identify the most likely candidates to be used for future integrated device development for practical applications.

Graphical abstract: Microparticle encoding technologies for high-throughput multiplexed suspension assays

Back to tab navigation

Article information

18 Mar 2009
29 Apr 2009
First published
07 May 2009

Integr. Biol., 2009,1, 345-362
Article type
Critical Review

Search articles by author