>> Like its marketed product ERBITUX® (cetuximab), the monoclonal antibodies in the ImClone pipeline are all type 1 immunoglobulin G (IgG1) antibodies. In vitro, IgG1 antibodies elicit antibody-dependent cellular cytotoxicity (ADCC), which can kill cancer cells and may contribute to their overall therapeutic effects. <<
As previously noted (#msg-19999027), AMGN’s Vectibix, which targets the same receptor as Erbitux, does not have ADCC functionality. It also doesn’t seem to work as well as Erbitux, and that’s probably not a coincidence.
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