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An immunosuppressive rat antibody (Campath-9) against human CD4 has been reshaped for use in the management of autoimmunity and the prevention of graft rejection. Two different forms of the reshaped antibody were produced that derive their heavy chain variable region framework sequences from the human myeloma proteins KOL or NEW. When compared to a chimeric form of the CD4 antibody, the avidity of the KOL-based reshaped antibody was only slightly reduced, whereas that of the NEW-based reshaped antibody was very poor. The successful reshaping to the KOL-based framework was by a procedure involving the grafting of human framework sequences onto the cloned rodent variable region by in vitro mutagenesis.

Original publication




Journal article


Proc Natl Acad Sci U S A

Publication Date





4181 - 4185


Amino Acid Sequence, Animals, Antibodies, Autoimmunity, Base Sequence, CD4 Antigens, Cloning, Molecular, Cricetinae, DNA, DNA, Recombinant, Graft Rejection, Humans, Immunoglobulin Heavy Chains, Immunoglobulin Light Chains, Immunoglobulin Variable Region, Molecular Sequence Data, Mutagenesis, Myeloma Proteins, Rats, Transfection