Humanised antibodies

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/46 (2006.01) A61K 39/395 (2006.01) A61K 47/48 (2006.01) A61K 49/00 (2006.01) A61K 51/10 (2006.01) C07K 16/18 (2006.01) C07K 16/24 (2006.01) C07K 16/28 (2006.01) G01N 33/577 (2006.01)

Patent

CA 2129219

CDR-grafted antibody heavy and light chains comprise acceptor framework and donor antigen binding regions, the heavy chains comprising donor residues at at least one of positions 6, 23 and/or 24, 48 and/or 49, 71 and/or 73, 75 and/or 76 and/or 78 and 88 and/or 91. The CDR-graftd light chains comprise donor residues at at least one of positions 1 and/or 3 and 46 and/or 47 or at at least one of positions 46, 48, 58 and 71. The CDR-grafted antibodies are preferably humanised antibodies, having non human, e.g. rodent, donor and human acceptor frameworks, and may be used for in vivo therapy and diagnosis. A generally applicable protocol is disclosed for obtaining CDR-grafted antibodies.

Les chaînes lourdes et légères d'un anticorps greffées au CDR comprennent les régions de fixation à l'antigène de la charpente de l'anticorps accepteur et de l'anticorps donneur. Les chaînes lourdes comportent des résidus de l'anticorps donneur à au moins une des positions 6, 23 et/ou 24, 48 et/ou 49, 71 et/ou 73, 75 et/ou 76 et/ou 78 et 88 et/ou 91. Les chaînes légères greffées au CDR comprennent des résidus de l'anticorps donneur à au moins une des positions 1 et/ou 3 et 46 et/ou 47 ou à au moins une des positions 46, 48, 58 et 71. Les anticorps greffés au CDR sont de préférence des anticorps humanisés, ayant des charpentes d'anticorps donneur non humain, p. ex., de rongeurs, et d'anticorps accepteur humain, et peuvent être utilisés pour la thérapie in vivo et le diagnostic. Un protocole généralement applicable est dévoilé pour obtenir des anticorps greffés au CDR.

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