Pharmaceutical compositions comprising bispecific anti-cd3, anti-cd19 antibody constructs for the treatment of b-cell related disorders
View Patent ↗The present invention relates to a pharmaceutical composition comprising a bispecific single chain antibody construct comprising binding domains specific for human CD3 and human CD19, wherein the corresponding variable heavy chain regions (V H ) and the corresponding variable light chain regions (V L ) regions are arranged, from N-terminus to C-terminus, in the order V H (CD19)-V L (CD19)-V H (CD3)-V L (CD3) or V H (CD3)-V L -(CD3)-V H (CD19)-V L (CD19). Processes for the production of the pharmaceutical compositions and medical/pharmaceutical uses for the specific bispecific single chain antibody molecules bearing specificities for the human CD3 antigen and the human CD19 antigen are also disclosed.
1. A pharmaceutical composition comprising a bispecific single chain antibody construct, said bispecific single chain antibody construct comprising binding domains specific for human CD3 and human CD19, wherein the corresponding variable heavy chain regions (V H ) and the corresponding variable light chain regions (V L ) regions are arranged, from N-terminus to C- terminus, in the order,
V H (CD19)-V L (CD19)-V H (CD3)-V L (CD3), or
V H (CD3)-V L (CD3)-V H (CD19)-V L (CD19).
2. The pharmaceutical composition of claim 1 , wherein said V H and V L regions of said CD3 specific domain are derived from an CD3 specific antibody consisting of: OKT-3.
3. The pharmaceutical composition of claim 1 , wherein said V H region comprises at least one CDR3 region comprising the amino acid sequence: SEQ ID NO: 54; at least one CDR2 region comprising the amino acid sequence: SEQ ID NO: 53; and at least one CDR1 region comprising the amino acid sequence: SEQ ID NO: 52; and wherein said V L region comprises at least one CDR3 region comprising the amino acid sequence: SEQ ID NO: 57; at least one CDR2 region comprising the amino acid sequence: SEQ ID NO: 56; and at least one CDR1 region comprising the amino acid sequence: SEQ ID NO: 55.
4. The pharmaceutical composition of claim 1 , wherein said bispecific single chain antibody construct comprises an amino acid sequence selected from the group consisting of
(a) an amino acid sequence as depicted in SEQ ID NO: 2;
(b) an amino acid sequence encoded by a nucleic acid sequence as shown in SEQ ID NOs: 1, 9 or 13; and
(c) an amino acid sequence encoded by a nucleic acid sequence which is degenerate as a result of the genetic code to a nucleotide sequence of (b).
5. The pharmaceutical composition of claim 1 , wherein said variable domains are connected by additional linker sequences.
6. A pharmaceutical composition claim 1 further comprising a proteinaceous compound capable of providing an activation signal for immune effector cells, wherein the proteinaceous compound is selected from the group consisting of scFv fragments specific for 4-1BB, OX 40, CD27, CD70, the receptors for B7-RP1, B7-H3 and scFv fragments specific for the T cell receptor or superantigens.
7. A process for the production of a pharmaceutical composition of claim 1 , said process comprising culturing a host cell under conditions allowing the expression of a bispecific single chain antibody construct comprising binding domains specific for human CD3 and human CD 19, wherein the corresponding variable heavy chain regions (V H ) and the corresponding variable light chain regions (V L ) are arranged, from N-terminus to C- terminus, in the order V H (CD19)-V L (CD19)-V H (CD3)-V L (CD3) or V H (CD3)-V L (CD3)-V H (CD19)-V L (CD19), recovering the produced bispecific single chain antibody construct from the culture, and producing the pharmaceutical composition.
8. A kit comprising a bispecific single chain antibody construct as defined in claim 1 .