| CPC C07K 16/2878 (2013.01) [A61P 35/00 (2018.01); C07K 16/30 (2013.01); C12N 15/62 (2013.01); A61K 38/00 (2013.01); A61K 2039/505 (2013.01); A61K 2039/507 (2013.01); C07K 16/46 (2013.01); C07K 2317/24 (2013.01); C07K 2317/31 (2013.01); C07K 2317/52 (2013.01); C07K 2317/526 (2013.01); C07K 2317/73 (2013.01); C07K 2317/75 (2013.01)] | 15 Claims |

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1. A method of treating a DR5-expressing solid tumor and/or hematological tumor comprising administering to a subject in need thereof an effective amount of a composition comprising a carrier, and a first antibody and a second antibody which bind to human DR5, wherein
(a) the first antibody comprises a variable heavy chain (VH) region comprising VHCDR1, VHCDR2, and VHCDR3 domains comprising the amino acid sequences set forth in SEQ ID NOs: 1, 8, and 3, respectively, and a variable light chain (VL) region comprising VLCDR1, VLCDR2, and VLCDR3 domains comprising the amino acid sequences set forth in SEQ ID NO: 5, the sequence FAS, SEQ ID NO: 6, respectively, and
(b) the second antibody comprises a VH region comprising VHCDR1, VHCDR2, and VHCDR3 domains comprising the amino acid sequences set forth in SEQ ID NOs: 10, 2, and 11, respectively, and a VL region comprising VLCDR1, VLCDR2, and VLCDR3 domains comprising the amino acid sequences set forth in SEQ ID NO: 13, the sequence RTS, SEQ ID NO: 14, respectively, and
wherein both the first antibody and second antibody comprise a Fc region of a human immunoglobulin IgG, and wherein the Fc region of both the first antibody and the second antibody comprises a substitution of an amino acid position corresponding to E430, E345 or S440 in human IgG1, wherein the numbering is according to the EU Index.
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