Recombinant anti-cd4 antibodies for human therapy

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/13 (2006.01) A61K 39/395 (2006.01) C07K 16/28 (2006.01) C07K 16/46 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2231182

Chimeric antibodies specific to human CD4 antigen, DNA encoding, pharmaceutical compositions containing the and use thereof as therapeutic agents are taught. These chimeric antibodies contain Old World monkey variable sequences and human constant domain sequences, preferably human gamma 1, gamma 4 or mutated forms thereof. These antibodies possess desirable therapeutic properties including low antigenicity, reduced (or absent) T cell depleting activity, good affinity to human CD4 and enhanced stability (in vivo half- life).

L'invention concerne des anticorps chimères spécifiques de l'antigène humain CD4, l'ADN qui les code, des compositions pharmaceutiques qui les contiennent et leur utilisation comme agents thérapeutiques. Ces anticorps chimères contiennent des séquences variables des singes de l'Ancien Monde et des séquences du domaine constant humain, de préférence des chaînes humaines gamma 1, gamma 4 ou leurs formes mutées. Ces anticorps possèdent des propriétés thérapeutiques intéressantes, parmi lesquelles une faible antigénicité, une activité de déplétion des cellules T réduite (ou absente), une bonne affinité avec les CD4 humains et une plus grande stabilité (demi-vie in vivo).

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