Hoffmann-la Roche Inc.

F. Hoffmann-la Roche Ag

Roland Staack

Gregor Jordan

Uwe Dahl

Christian Klein

Ekkehard Moessner

Pablo Umana

Kay-Gunnar Stubenrauch

Sabine Imhof-Jung

Petra Rueger

Maria Amann

Harald Duerr

Alexander Bujotzek

Johannes Sam

Kevin Brady

Joerg Zielonka

Martin Schaefer

Thomas Kraft

Estelle Marrer-Berger

Laurene Pousse

Juergen Peter Bachl

Carina Cantrill

Janine Faigle

Dietrich Tuerck

Sylvia Rottach

Miriam Moheysen-Zadeh

Herein is reported a method for the determination of the binding affinity of a binder and its ligand comprising the step of determining based on the result of an immunoassay the fraction of free binder in a sample comprising binder, ligand and binder-ligand-complexes for at least two different binder:ligand ratios in the sample, and if the determined fraction of free binder is not comparable for all used binder:ligand ratios then the binder:ligand ratio in the sample is lowered and the sample is re-analyzed by the same immunoassay, and calculating based on the fraction of free binder in the previous step the binding affinity for the binder to its ligand.

Immunoassay-based determination of in-solution binding kinetics

Herein is reported an immunoassay for quantifying the amount of anti-drug antibody, which anti-drug antibody can specifically bind to a drug antibody, which drug antibody can specifically bind to a therapeutic target, in a serum or plasma sample comprising the steps of a) incubating the serum or plasma sample at a pH value that is about the pI value of the target, and optionally removing formed precipitate after the incubation, b) incubating the serum or plasma sample obtained in step a) at a pH value of about 2, and optionally centrifuging the incubated sample to remove formed precipitate, c) adjusting the pH value to about 7.4, adding capture antibody conjugated to a first member of a binding pair and tracer antibody conjugated to a detectable label to the serum or plasma sample obtained in step b) and incubating the mixture to form a capture antibody-anti-drug antibody-tracer antibody-complex, d) quantifying the complex formed in step c) and thereby quantifying the amount of anti-drug antibody in the serum or plasma sample.

Target interference suppressed anti-drug antibody assay

Herein is reported a method for determining the concentration of a therapeutic antibody in a tissue of an experimental animal to whom the therapeutic antibody had been administered, wherein the interference from residual blood in a tissue sample of the experimental animal, which is used for determining the concentration of the therapeutic antibody in said tissue, is reduced by applying an inert reference antibody that does not penetrate into said tissue, whereby the inert reference antibody is administered 2 to 10 minutes prior to obtaining the tissue and blood sample.

Method for determining the amount of a therapeutic antibody in the brain

The invention relates to novel bispecific antigen binding molecules, comprising at least two antigen binding domains capable of specific binding to OX40 and a particular antigen binding domain capable of specific binding to Fibroblast Activation Protein (FAP), and to methods of producing these molecules and to methods of using the same.

Bispecific antigen binding molecules targeting OX40 and FAP

Herein is reported a method for determining in a sample the (total, i.e. binding competent) amount of a ligand of a ligand-binding protein (therapeutic) comprising the following steps in the following order: subjecting the sample to an acid treatment, forming in solution a non-covalent complex comprising i) an anti-ligand antibody, ii) the ligand, and iii) labelled ligand-binding protein, by adding anti-ligand antibody and labelled ligand-binding protein to the sample, and determining the amount of the complex and thereby determining the amount of the ligand of the ligand-binding protein.

Three-step acid dissociation enzyme linked immunosorbent (TADELIS) assay

Thus, herein is reported a method for analyzing/characterizing circulating immune complexes (CICs) formed in vivo comprising a size-exclusion chromatography of a sample obtained from a mammal to which the drug had been administered at least once for determining the weight/size of the immune complexes, optionally a second non-SEC chromatography, and at least one immunoassay, whereby the immune complex is characterized by the correlation of the immune complex size and the immunoassay result/read-out. Also reported herein is the use of a method as reported herein for determining a correlation to altered pharmacokinetics, for determining loss or reduction of efficacy, for determining neutralization of natural counterparts of the drug, for determining immune and hypersensitivity reactions, including serum sickness/type III hypersensitivity reaction/immune complex-mediated disease.

Multiplexed chromatography-immunoassay method for the characterization of circulating immune complexes

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Munich, Germany

Roland Staack