Some impurities generated during salmon calcitonin peptide synthesis showed potential to bind immune molecules and stimulate T cells, posing immunogenicity risk.
T-cell stimulation detectedCertain synthesis byproducts of salmon calcitonin showed the ability to activate immune T cells in laboratory assays
What the researchers found
Certain synthesis-derived impurities of salmon calcitonin showed potential to bind HLA molecules and stimulate T cells, indicating immunogenicity risk that warrants monitoring.
Why it matters
As more peptide drugs shift from biological to chemical manufacturing, understanding whether new impurities can trigger immune reactions is essential for drug safety.
The numbers in context
Impurities included amino acid insertions, deletions, and side-chain modifications from the synthesis process.
How the study worked
Combined computational (in silico) prediction with in vitro HLA binding and T-cell stimulation assays to assess immunogenicity of peptide impurities.
Who was studied
In silico and in vitro immunogenicity assessment of peptide impurities
What this study cannot tell us
In silico and in vitro methods can predict immunogenicity risk but cannot confirm actual clinical immune reactions. In vivo validation would be needed.
How to read the evidence
Rated preliminary: combined computational and in vitro assessment identifying risk, but clinical significance needs in vivo confirmation.
When this study was published
Published in 2024. Timely as more peptide drugs (especially GLP-1 drugs) shift to chemical synthesis manufacturing.
The bigger picture
More peptide drugs are being manufactured by chemical synthesis instead of biological production. Understanding the immunogenicity risk of synthesis-related impurities is essential for ensuring generic and biosimilar peptide drug safety.
Questions still open
- Should immunogenicity testing be mandatory for all chemically synthesized peptide drugs?
- Do these impurities accumulate at clinically relevant levels?
Common questions
What are peptide drug impurities?
Can impurities in peptide drugs cause allergic reactions?
Read the original research
Assessing the immunogenicity risk of salmon calcitonin peptide impurities using in silico and in vitro methods.
Frontiers in pharmacology, 15, 1363139
Citation
Roberts, Brian J; Mattei, Aimee E; Howard, Kristina E; Weaver, James L; Liu, Hao; Lelias, Sandra; Martin, William D; Verthelyi, Daniela; Pang, Eric; Edwards, Katie J; De Groot, Anne S. (2024). Assessing the immunogenicity risk of salmon calcitonin peptide impurities using in silico and in vitro methods.. Frontiers in pharmacology, 15, 1363139. https://doi.org/10.3389/fphar.2024.1363139