Epitope Resolved Detection of Peanut Specific IgE Antibodies by SPR Imaging

Min Shen, Amit A. Joshi, Raghu Vannam, Chandra K. Dixit, Robert G. Hamilton, Challa V. Kumar, James F. Rusling, Mark W. Peczuh*

Accurate characterization of antibodies (IgEs) in individuals exposed to allergens such as peanuts can provide insight into the clinical manifestation of an allergic reaction and also reveal how its fundamental immunobiology works. Measurement of IgEs to specific allergen epitopes in serum has been a major challenge. UConn Chemistry grad student Min Shen was the lead author on a recent paper in ChemBioChem reporting a new method that first captures IgEs from serum by using anti-IgE decorated magnetic nanoparticles, then measures IgEs binding to specific epitopes from allergen proteins using arrayed SPR imaging. The new technique was used to catalog anti-peanut IgEs in a set of patient samples and showed excellent correlation with clinical diagnostics. The cover art was prepared by Ella Maru studios.