Detecting Non-Human Sialic Acid in Human Tissues and Biotherapeutic Products
Author Information
Author(s): Diaz Sandra L., Padler-Karavani Vered, Ghaderi Darius, Hurtado-Ziola Nancy, Yu Hai, Chen Xi, Brinkman-Van der Linden Els C. M., Varki Ajit, Varki Nissi M.
Primary Institution: University of California San Diego
Hypothesis
Can a novel antibody-based method be developed for the sensitive and specific detection of the non-human sialic acid N-glycolylneuraminic acid (Neu5Gc) in human tissues and biotherapeutic products?
Conclusion
The study presents a reliable method for detecting Neu5Gc in human tissues and biotherapeutic products, which has not been previously described.
Supporting Evidence
- Humans cannot synthesize Neu5Gc but can incorporate it from dietary sources.
- High levels of circulating anti-Neu5Gc antibodies are found in normal humans.
- The developed antibody allows for sensitive detection of Neu5Gc in various contexts.
- The method is applicable to multiple analytical techniques including ELISA and flow cytometry.
- Neu5Gc has been detected in human tumors and some biotherapeutic products.
- The study provides a method to eliminate Neu5Gc from biotherapeutic products.
Takeaway
Humans can't make a certain sugar called Neu5Gc, but they can get it from food. This study found a new way to detect this sugar in human tissues and medicines.
Methodology
The study developed a novel affinity method using sequential columns of immobilized human and chimpanzee serum sialoglycoproteins to create a mono-specific antibody for detecting Neu5Gc.
Limitations
The study may not account for all potential sources of Neu5Gc contamination in biotherapeutic products.
Digital Object Identifier (DOI)
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