Peanut allergies: New diagnostic tool improve detection

CHARLOTTESVILLE, Va. — “Caution: This product may contain nuts.” It’s an increasingly common warning on food labels of all kinds, given the recent heightened awareness of the dangers of nut allergies. Roughly three million Americans suffer from peanut allergies; yet current diagnostic methods don’t detect every case. New findings by University of Virginia scientists, however, may allow for the development of more sensitive diagnostic tools and a better understanding of nut allergies.

The study, “Structural and Immunologic Characterization of Ara h 1, a Major Peanut Allergen,” appeared in the November 11 issue of the Journal of Biological Chemistry.

Rethinking the proteins

In the study, researchers determined that the emerging cutting-edge use of a recombinant, or artificially produced, protein in diagnostic tests may not be a suitable replacement for the natural protein Ara h 1, one of the major peanut allergens. This new insight will be critical in the effort to accurately diagnose peanut allergies and better understand their mechanisms.

“In allergy diagnostics, using a recombinant protein is thought to reveal more consistent results, as they are more homogenous than natural proteins. Individual protein molecules purified from a natural source show much more variation at a molecular level from one another,” says Wladek Minor, PhD, professor of molecular physiology and biological physics in the UVA School of Medicine and study co-leader.

“However, people are exposed to allergens from natural sources, not recoLunarcharge Premium