Abstract: Herein are reported anti-PDGF-B antibodies and their use in ophthalmology.

Abstract: Herein are reported anti-ANG2 antibodies. A specific anti-ANG2 antibody comprises (a) a HVR-H1 comprising the amino acid sequence of SEQ ID NO: 29, (b) a HVR-H2 comprising the amino acid sequence of SEQ ID NO: 30, and (c) a HVR-H3 comprising the amino acid sequence of SEQ ID NO: 32.

Abstract: Herein are reported novel bispecific antibodies that specifically bind to two different antigens selected from the group consisting of human ANG2, human VEGF, human IL-1beta and human PDGF-B.

Abstract: Herein is reported that for transient transfections the use of the human elongation factor 1 alpha promoter (with Intron A) provides for an enhanced productivity (in LC-HC-SM organization), the use of the bovine growth hormone polyA signal sequence provides for an enhanced productivity compared to use of the SV40 polyA signal sequence, the addition of the HGT to the bGH PolyA signal sequence results in an increased productivity in vectors containing the hCMV promoter and the vector organization LC(3?-5?)-HC-SM results in improved expression. For stable pools it is reported that pools generated with vectors containing the hEF1? promoter show an enhanced productivity in batch analysis, clones generated with vectors containing the hEF1? promoter show a reduced number of low producing clones, and clones generated with vectors containing the hEF1? promoter show a higher stability of IgG expression.

Abstract: Herein is reported a method for determining a combination of antigen binding sites comprising the steps of (i) determining the binding specificity and/or affinity and/or effector function and/or in vivo half-life of a multitude of bispecific antibodies prepared by combining each member of a first multitude of antibody Fab fragments or scFv antibody fragments with each member of a second multitude of antibody Fab fragments or scFv antibody fragments, and a linker comprising at one of its termini the second member of the first binding pair and at the respective other terminus the second member of the second binding pair, whereby the first multitude specifically binds to a first cell surface molecule and the second multitude specifically binds to a second cell surface molecule, and (ii) choosing the bispecific antibody with suitable binding specificity and/or affinity and/or effector function and/or in vivo half-life and thereby determining a combination of antigen binding sites.

Abstract: Herein is reported a method of selecting a cell expressing a bispecific antibody comprising the steps of (a) generating a population of eukaryotic cells by transduction with a population of lentiviral virus particles, whereby each cell of the population of cells displays a membrane-bound full length antibody which is encoded by the lentiviral nucleic acid, and which specifically binds to two or more antigens or two or more epitopes on the same antigen, and (b) selecting from the population of eukaryotic cells a cell depending on the properties of the displayed membrane-bound full length antibody, whereby each lentiviral virus particle of the population of lentiviral virus particles comprises a bicistronic expression cassette comprising the EV71-IRES for the expression of the membrane-bound antibody.

Abstract: Herein is reported an expression vector comprising—an antibody light chain expression cassette,—an antibody heavy chain expression cassette, and—a selection marker expression cassette, wherein the expression cassettes are arranged unidirectional, and wherein the expression cassettes are arranged in the 5? to 3? sequence of antibody heavy chain expression cassette, antibody light chain expression cassette and selection marker expression cassette. Further are reported herein methods for the generation of antibody producing cells and the use of these cells for the recombinant production of antibodies.