Ricin toxin is a very deadly plant protein that is synthesized by the plant Ricinus communis. The molecular structure of ricin toxin places it in a group of similar proteins classified as a Type II RIP due to its heterodimeric construction; it is composed of a toxic A-chain possessing enzymatic action, and a receptor binding B-chain. Monoclonal antibodies were obtained with binding activities against either the A-chain or B-chain, and a surrogate non-toxic ricin analogue, TST10114, was determined to be suitable for characterization of the anti-ricin monoclonal antibodies. One potent anti-ricin A-chain neutralizing monoclonal antibody was chosen for chimerization, RAC18, which exhibited strong binding affinity and neutralizing properties. The constant regions of a human immunoglobulin G2 (IgG2) were used as the backbone for the recombinant chimeric antibody. The resulting chimeric RAC18-huG2 was transiently expressed in human-derived HEK 293F cells, purified, and assessed for binding characteristics and functional attributes.
| Identifer | oai:union.ndltd.org:MANITOBA/oai:mspace.lib.umanitoba.ca:1993/4526 |
| Date | 12 April 2011 |
| Creators | Vendramelli, Robert Matthew |
| Contributors | Berry, Jody (Medical microbiology), Corbett, Cindi (Medical Microbiology) Yao, Xiaojian (Medical Microbiology) Soussi-Gounni, Abdelilah (Immunology) |
| Source Sets | University of Manitoba Canada |
| Language | en_US |
| Detected Language | English |
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