Peanut Allergies: Breakthrough Could Improve Diagnoses

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 recombinant protein,” he continues, “and people develop antibodies to different fragments of natural allergens. If there is a significant difference between a natural source and the recombinant allergen used for allergy diagnosis, the recombinant allergen is not a good replacement in the test, because different types of allergies can be overlooked.”

In their analysis, researchers also found strong similarities in the structure of the Ara h 1 protein and those of other plant-seed proteins, which could help explain why patients with peanut allergies frequently also have allergies to tree nuts such as walnuts, almonds, and cashews.

Allergy Detection Could Save Lives
For children and adults who suffer from these serious allergies, accurate and early detection is critical. Allergic reactions to peanuts and tree nuts are the number-one cause of food-induced anaphylaxis, a life-threatening condition that develops rapidly after consumption. Armed with an accurate diagnosis, however, allergy sufferers can learn to avoid certain foods and equip themselves with a portable injection of epinephrine, the lifesaving treatment for anaphylaxis.

The team’s next steps in their research will be to determine exactly why peanut-allergic patients are often allergic to tree nuts as well, and to explain why peanut and tree-nut allergies are extremely difficult to outgrow, usually lasting a lifetime.

In addition to Minor, the international research team included Maksymilian Chruszcz, a member of Minor’s UVA research group; Soheila Maleki, from the U.S. Department of Agriculture; and Heimo Breiteneder, from the Medical University of Vienna. The multidisciplinary study included structural, bioinformatics, and immunological research on Ara h 1. Some methodology used in the project was developed as part of the NIH Protein Structure Initiative, and in particular the New York Structural Genomics Consortium.

Media Contact

Sally H. Jones Newswise Science News

More Information:

http://www.virginia.edu

All latest news from the category: Life Sciences and Chemistry

Articles and reports from the Life Sciences and chemistry area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Back to home

Comments (0)

Write a comment

Newest articles

Lighting up the future

New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens and lighting. Researchers at the Organic Semiconductor Centre in the School of Physics and…

Researchers crack sugarcane’s complex genetic code

Sweet success: Scientists created a highly accurate reference genome for one of the most important modern crops and found a rare example of how genes confer disease resistance in plants….

Evolution of the most powerful ocean current on Earth

The Antarctic Circumpolar Current plays an important part in global overturning circulation, the exchange of heat and CO2 between the ocean and atmosphere, and the stability of Antarctica’s ice sheets….

Partners & Sponsors