>> Development strategy of anti-idiotypic antibodies for monoclonal antibody drugs

Decades of development, monoclonal antibodies (mAb) have gradually transformed from scientific research tools (reagents) to biological drugs that provide a new therapeutic modality for a variety of diseases. Developing anti-idiotypic antibodies is important in studying a mAbs effectiveness and safety.

>> Development strategy of anti-idiotypic antibody for bispecific antibodies

Bispecific antibody: A modified antibody containing two specific antigen-binding sites. The pharmacokinetic analysis of the drug is more complex because of its two distinct variable regions.

To better evaluate the safety and efficacy of antibody drugs, it is generally recommended that researchers choose to develop anti-idiotypic antibodies for the complete bispecific antibody when performing PK analysis.

>> Development strategy of anti-idiotypic antibody for ADC drugs

Antibody-drug conjugates (ADCs) are innovative biopharmaceutical products in which a monoclonal antibody is linked to a small molecule drug with a stable linker. Due to the structural specificity and complexity of ADCs, the evaluation of PK for ADCs requires a unique and more complex bioassay protocol compared to conventional small molecular drugs and monoclonal antibodies.

PK analysis of ADCs typically detects three key components: total antibodies, total ADC drugs, and free small molecular cytotoxic drugs (with/without linker). Researchers typically use ligand-binding assay for ADCs and total antibodies to assess the effectiveness and targeted toxicity of ADCs. For the safety and stability assessment of ADCs, that is, the toxicity of such drugs to non-tumor cells in vivo, it is necessary to quantify the free small molecular toxicity.

>> Development strategy of anti-idiotypic antibody for CAR-T drugs

Chimeric antigen receptor T (CAR-T) cell immunotherapy. CAR-T cells are the antigen-binding parts of antibodies that can recognize a specific tumor antigen with the intracellular part of the CD3-ζ chain or FcεRIγ in vitro coupled to a chimeric protein. CAR was expressed in T cells of patients by gene transduction. For CAR-T, real-time fluorescence quantitative polymerase chain reaction (qPCR) and flow cytometry (FCM) were used for PK analysis to determine the foreign gene copy and the number of CAR + cells, respectively. Cell-based assays are used to screen anti-idiotypic antibodies against genetically engineered scFv antibodies for PK analysis of CAR-T.

>> Development strategy of anti-idiotypic antibody for biosimilar

For the PK / ADA assays of biosimilar drugs, anti-idiotypic antibodies can be developed according to the variable region of the drug, or the original ADA product can be purchased.

ACROBiosystems has developed a series of high-affinity, high-specific anti-idiotypic antibodies and PK blood concentration quantitative detection kits for immunogenicity analysis and pharmacokinetic studies to support these studies. We will develop the corresponding protocol according to the different application scenarios for each anti-idiotypic antibody, hoping to speed up the drug development process to the greatest extent. The products developed cover adalimumab, rituximab, cetuximab, trastuzumab, bevacizumab, and many other popular antibody drugs.

ACROBiosystems, as a global brand of protein technologies, products, and services focused on biologics, is committed to providing targeted antigens, other key reagents and related services required in the development process of targeted therapeutic drugs. To meet the diverse needs of customers, we can also provide one-stop service from antigen preparation to monoclonal anti-idiotypic antibodies, polyclonal anti-idiotypic antibody, pharmacokinetics, and immunogenicity test kit development.

Contact us: You can fill in the inquiry form onlineAnti-Idiotypic Antibody development service inquiry and we will respond to your needs within 24 hours.