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Complement 3b Deposition on Rituximab Opsonized

Sponsored by EMD Millipore

The ImageStream® imaging flow cytometry platform was used to study the mechanism of action of Rituximab (RTX). RTX is a therapeutic monoclonal antibody directed against CD20 for the treatment of Non-Hodgkin’s lymphoma. In this experiment, B cells were opsonized with RTX (labeled with AlexaFluor® 488 (AF488)) and analyzed for C3b deposition after incubation in normal human serum as a source of complement. Using the ImageStream® platform we were able to quantify the degree of co-localization between Rituximab and C3b using the Bright Detail Similarity algorithm available in the IDEAS® software.

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