Introducing dendritic cell antibody internalization as an immunogenicity risk assessment tool

Area of Science:

• Biotechnology
• Immunology
• Pharmacology

Background:

• Assessing biotherapeutic immunogenicity is crucial for drug safety and efficacy.
• Existing immunogenicity risk assessment assays require refinement for better predictive power.

Purpose of the Study:

• To develop and validate a novel assay for predicting biotherapeutic immunogenicity.
• To measure antibody internalization by antigen-presenting cells as a key immunogenicity predictor.

Main Methods:

• Development of a fluorescence-based assay to quantify antibody uptake.
• Measurement of cell-surface and intracellular antibody fluorescence signals.
• Calculation of an internalization index by subtracting extracellular signal from intracellular signal.

Main Results:

• The novel assay successfully measured antibody internalization by antigen-presenting cells.
• Higher antibody internalization was observed for biotherapeutics with greater clinical immunogenicity.
• A direct correlation was established between antibody internalization and clinical immunogenicity risk.

Conclusions:

• The developed assay serves as a valuable tool for predicting biotherapeutic immunogenicity.
• Antibody internalization by antigen-presenting cells is a reliable indicator of immunogenicity risk.
• This assay can enhance the safety and efficacy assessment of antibody-based biotherapeutics.