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- W3048274170 abstract "Abstract Multiplexed bead-based assays that use Luminex xMAP ® technology have become popular for measuring antibodies against proteins of interest in many fields, including malaria and more recently SARS-CoV-2/COVID-19. There are currently two formats that are widely used: non-magnetic beads or magnetic beads. Data is lacking regarding the comparability of results obtained using these two types of beads, and for assays run on different instruments. Whilst non-magnetic beads can only be run on flow-based instruments (such as the Luminex ® 100/200™ or Bio-Plex ® 200), magnetic beads can be run on both these and the newer MAGPIX ® instruments. In this study we utilized a panel of purified recombinant Plasmodium vivax proteins and samples from malaria-endemic areas to measure P. vivax -specific IgG responses using different combinations of beads and instruments. We directly compared: i) non-magnetic versus magnetic beads run on a Bio-Plex ® 200, ii) magnetic beads run on the Bio-Plex ® 200 versus MAGPIX ® and iii) non-magnetic beads run on a Bio-Plex ® 200 versus magnetic beads run on the MAGPIX ® . We also performed an external validation of our optimized assay. We observed that IgG antibody responses, measured against our panel of P. vivax proteins, were strongly correlated in all three of our comparisons, however higher amounts of protein were required for coupling to magnetic beads. Our external validation indicated that results generated in different laboratories using the same coupled beads are also highly comparable, particularly if a reference standard curve is used." @default.
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- W3048274170 date "2020-08-10" @default.
- W3048274170 modified "2023-10-18" @default.
- W3048274170 title "A comparison of non-magnetic and magnetic beads for measuring IgG antibodies against P. vivax antigens in a multiplexed bead-based assay using Luminex® technology (Bio-Plex® 200 or MAGPIX®)" @default.
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- W3048274170 doi "https://doi.org/10.1101/2020.08.10.243980" @default.
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