Peptide Immunogenicity: Why Immune Responses Matter

Peptides are often described as small molecules, but some can still provoke immune responses. Immunogenicity depends on factors such as sequence, aggregation, impurities, exposure and the way a compound is delivered. Researchers may test for anti-drug antibodies and assess whether those antibodies change activity or trigger unwanted reactions. Not every detected antibody causes a clinical problem, and the absence of a signal in a small study does not prove long-term safety. Understanding immunogenicity helps explain why manufacturing consistency and appropriately designed clinical trials are important.