Antibody/Biologics R&D Services
Assay Platform

Viva Biotech has a professional team specializing in preclinical druggability and functionality testing of antibody drugs, offering comprehensive services in immunocyte differentiation and inducted amplification, in vitro efficacy testing of antibody drugs, and development and validation of other antibody drug immunofunctional experimental methods.

  • Immunocyte Differentiation and Inducted Amplification Platform
    T cell activation experiments
    Treg cell amplification and functional verification services
    Dendritic cell (iDC/mDC) induction services
    Macrophage induction services
    NK cell activation and amplification services
  • In Vitro Efficacy Testing Platform for Antibody Drugs
    Antibody-dependent cellular cytotoxicity (ADCC) experiments
    Antibody-dependent cellular phagocytosis (ADCP)
    Complement-dependent cytotoxicity (CDC) experiments
    Mixed lymphocyte reaction (MLR)
    T cell/NK cell killing assay
    Antibody affinity and blockade activity assay
    Antibody internalization activity assay
    ADC drug-mediated cytotoxicity assay
    Multicellular inflammatory cytokine release assay
    Vaccine immunogenicity assessment
  • Other Functional Verification and Customized Experiments for Biologics
    Extracellular Cytokine Secretion Assay
    Cell Cycle Analysis
    Apoptosis Assay
    HTRF Assay
    AlphaLISA Assay
  1. Immunocyte Differentiation and Inducted Amplification Platform

    T cell activation experiments

    T cells primarily mediate cellular immunity and regulate the body's immune response. The T cell immune response is the most critical host response in controlling tumor growth and development.

    Data Presentation

    Treg Cell Amplification and Functional Verification

    Regulatory T cells (Treg) are one of the important factors in maintaining the body's immune tolerance. They can also actively regulate the immune response to foreign antigens and antigen-related self-changes.

    Data Presentation

    Dendritic Cell (iDC/mDC) Induction

    DC cells are a group of professional antigen-presenting cells with super-strong ability to activate primary T cells. They are the initiators of adaptive immune responses. DC cells have great plasticity, which can play an immune activating role and induce immune tolerance, and have multiple functions such as antigen presentation, immune tolerance, T cell polarization, B cell regulation, and participation in innate immune response.

    Data Presentation

    Macrophage induction

    M0 macrophages are derived from monocytes differentiated by M-CSF (macrophage colony-stimulating factor). Depending on the activation mode of M0 macrophages, they can be further divided into two categories: classical activated M1 macrophages and alternatively activated M2 macrophages. M2 macrophages mainly perform immune regulatory functions and promote Th2-mediated immune responses.

    Data Presentation

    NK Cell Activation and Amplification

    Natural killer (NK) cells are important immune cells in the body. They are not only related to anti-tumor, anti-viral infection, and immune regulation, but also involved in the occurrence of hypersensitivity reactions and autoimmune diseases in certain cases, and can recognize target cells and cytotoxic agents.

    Data Presentation

    NK cells were treated with plate-bound anti-NKp46 antibody, GolgiPlug, and anti-CD107a fluorescent antibody at 37°C for 4-6 hours. Then the cells were collected, fixed and permeabilized, and intracellular IFN-γ was stained and analyzed by flow cytometry. NK cell degranulation was assessed by surface expression of CD107a.

  2. Antibody Drug In Vitro Efficacy Testing Platform

    Antibody-dependent Cellular Cytotoxicity (ADCC) Assay

    The ability to mediate ADCC against target cells is an important functional indicator of antibody candidate molecules targeting cancer-associated antigens.

    Data Presentation

    Antibody-Dependent Cellular Phagocytosis (ADCP) Assay

    ADCP assays are an important part of antibody drug efficacy assessment and are a well-established and robust method for evaluating macrophage-mediated induction and phagocytosis.

    Data Presentation

    Complement-Dependent Cytotoxicity (CDC) Assay

    Complement-dependent cytotoxicity involves the binding of the Fc region of an antibody to complement molecules and activating them. The Fab region of the antibody binds to the target cell, subsequently forming a membrane attack complex, ultimately leading to the lysis of the target cell.

    Data Presentation

    Mixed Lymphocyte Reaction (MLR)

    To mimic the ability of DCs to activate or suppress T cell proliferation and cytokine secretion in vitro is a very important approach to understanding the functionality of compounds that act as either agonists or antagonists.

    Data Presentation

    Compounds were tested for their ability to drive T cell activation and proliferation in an MLR. T cell activation was analyzed by flow cytometry for CD4, CD8, and CellTrace Violet

    T Cell/NK Cell Killing Assay

    Effector cells are co-incubated with target cells at various effector to target ratios, and in the presence of the test antibody, to determine the ability to kill target cells.

    Data Presentation

    Antibody Internalization Activity Assay

    The internalization efficiency of antibody therapeutics can be assessed by multiple approaches, including changes in cell surface antibody binding levels, fluorescently-labeled antibodies, and DT3C-conjugated antibodies.

    Data Presentation

    ADC-Mediated Cytotoxicity Assays

    Cytotoxicity assays are important tools for screening promising ADC candidates, predicting the in vivo efficacy of ADCs, and evaluating their cell-specific toxicity

    Data Presentation

    Multicellular Inflammatory Cytokine Release Assay

    Based on Cytometric Bead Array (CBA), multiple cellular inflammatory cytokine releases are detected to evaluate the safety of antibody drugs.

    Data Presentation

    Vaccine Immunogenicity Assessment

    Viva Biotech has established a robust technology platform to provide preclinical vaccine immunogenicity assessment services to our clients. Among them are a variety of assays to evaluate T cell immunogenicity induced by different types of vaccines (e.g., mRNA vaccines, peptide vaccines, etc.) through co-culture of dendritic cells with T cells/PBMCs. These assays include, but are not limited to, FACS-based analysis of T cell subset changes and ELISPOT-based cytokine secretion assays.

    Data Presentation

  3. Other Functional Verification and Customized Experiments for Biologics

    Viva Biotech offers a comprehensive suite of functional assays to characterize the immunomodulatory properties of antibody therapeutics for our clients, with customized experimental services available upon request.

    Extracellular Cytokine Secretion Assay

    Data Presentation

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