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Diabody-Ig: a novel platform for the generation of multivalent and multispecific antibody molecules.

ABSTRACT: Multivalent mono- or bispecific antibodies are of increasing interest for therapeutic applications, such as efficient receptor clustering and activation, or dual targeting approaches. Here, we present a novel platform for the generation of Ig-like molecules, designated diabody-Ig (Db-Ig). The antigen-binding site of Db-Ig is composed of a diabody in the VH-VL orientation stabilized by fusion to antibody-derived homo- or heterodimerization domains, e.g., CH1/CL or the heavy chain domain 2 of IgE (EHD2) or IgM (MHD2), further fused to an Fc region. In this study, we applied the Db-Ig format for the generation of tetravalent bispecific antibodies (2 + 2) directed against EGFR and HER3 and utilizing different dimerization domains. These Db-Ig antibodies retained the binding properties of the parental antibodies and demonstrated unhindered simultaneous binding of both antigens. The Db-Ig antibodies could be purified by a single affinity chromatography resulting in a homogenous preparation. Furthermore, the Db-Igs were highly stable in human plasma. Importantly, only one short peptide linker (5 aa) per chain is required to generate a Db-Ig molecule, reducing the potential risk of immunogenicity. The presence of a fully functional Fc resulted in IgG-like pharmacokinetic profiles of the Db-Ig molecules. Besides tetravalent bispecific molecules, this modular platform technology further allows for the generation of other multivalent molecules of varying specificity and valency, including mono-, bi-, tri- and tetra-specific molecules, and thus should be suitable for numerous applications.

SUBMITTER: Seifert O

PROVIDER: S-EPMC6601561 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Diabody-Ig: a novel platform for the generation of multivalent and multispecific antibody molecules.

Seifert Oliver O Rau Alexander A Beha Nadine N Richter Fabian F Kontermann Roland E RE

mAbs 20190503 5

Multivalent mono- or bispecific antibodies are of increasing interest for therapeutic applications, such as efficient receptor clustering and activation, or dual targeting approaches. Here, we present a novel platform for the generation of Ig-like molecules, designated diabody-Ig (Db-Ig). The antigen-binding site of Db-Ig is composed of a diabody in the VH-VL orientation stabilized by fusion to antibody-derived homo- or heterodimerization domains, e.g., CH1/C<sub ...[more]

PMID: 30951400

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Dataset Information

Diabody-Ig: a novel platform for the generation of multivalent and multispecific antibody molecules.

Publications

Diabody-Ig: a novel platform for the generation of multivalent and multispecific antibody molecules.

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