Immunogenicity
Definition
The ability of a substance to provoke an immune response, including the formation of antibodies against a therapeutic molecule.
By PurePeptideHub Editorial Team · Updated . Educational source review; independent clinical review pending.
Why antibodies require interpretation
An antibody-positive result does not always mean a treatment has stopped working. Investigators distinguish binding antibodies from antibodies that neutralize biological activity, and consider timing, persistence and clinical consequences. The assay used to detect them is part of the evidence.
References: [1]
What a good study reports
Look for baseline testing, follow-up samples, the proportion developing antibodies and any relationship with exposure, effectiveness or adverse reactions. A small, short study may be unable to characterize uncommon or delayed immune effects. Absence of a reported reaction is not a measurement of every possible immune response.
Product quality matters too
FDA recommends a risk-based assessment for therapeutic proteins. Sequence, formulation, aggregates and the patient setting can matter; the word peptide alone does not define risk. An HPLC purity percentage cannot substitute for an immunogenicity assessment.