Cross-species-specific psmaxcd3 bispecific single chain...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/28 (2006.01) C07K 16/22 (2006.01) C07K 16/30 (2006.01) C07K 16/40 (2006.01)

Patent

CA 2738565

The present invention relates to a bispecific single chain antibody molecule comprising a first binding domain capable of binding to an epitope of human and non-chimpanzee primate CD3 epsilon chain, wherein the epitope is part of an amino acid sequence comprised in the group consisting of SEQ ID NOs. 2, 4, 6, and 8, and a second binding domain capable of binding to prostate-specific membrane antigen (PSMA). The invention also provides nucleic acids encoding said bispecific single chain antibody molecule as well as vectors and host cells and a process for its production. The invention further relates to pharmaceutical compositions comprising said bispecific single chain antibody molecule and medical uses of said bispecific single chain antibody molecule.

La présente invention concerne une molécule d'anticorps monocaténaire bispécifique, qui comprend: un premier domaine de liaison pouvant s'attacher à un épitope d'une chaîne CD3-epsilon d'être humain ou de primate autre qu'un chimpanzé, ledit épitope étant un élément d'une séquence d'acides aminés formant partie du groupe constitué des séquences SEQ ID Nos. 2, 4, 6 et 8; et un second domaine de liaison pouvant s'attacher à un antigène sélectionné dans le groupe constitué par l'antigène de membrane spécifique de la prostate (PSMA). Linvention concerne également des acides nucléiques codant ladite molécule d'anticorps monocaténaire bispécifique, ainsi que des vecteurs et des cellules hôtes, et la méthode de production de cette molécule. L'invention concerne en outre des compositions pharmaceutiques comprenant cette molécule d'anticorps monocaténaire bispécifique et ses utilisations dans le domaine médical.

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