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Pathogenesis-related (PR)-proteins identified as allergens.

K Hoffmann-Sommergruber1

  • 1Department of Pathophysiology, University of Vienna, AKH-EBO 3Q, Waehringer Guertel 18-20, Austria. Karin.Hoffmann@akh-wien.ac.at

Biochemical Society Transactions
|November 21, 2002
PubMed
Summary

Type 1 allergies affect 25% of people. Pathogenesis-related proteins (PR-proteins) are common plant allergens, often stable and small, increasing allergy risks.

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Area of Science:

  • Immunology
  • Plant Biochemistry
  • Allergology

Background:

  • Type 1 allergies impact approximately 25% of the population in industrialized Northern hemisphere countries.
  • Allergic individuals produce specific IgE antibodies upon exposure to inhaled or ingested allergens.
  • About 25% of plant allergens in the International Union of Immunological Societies database are pathogenesis-related proteins (PR-proteins).

Purpose of the Study:

  • To identify pathogenesis-related proteins (PR-proteins) with allergenic potential.
  • To understand the significance of PR-proteins in plant-derived food allergies.
  • To inform the evaluation of genetically modified foods and labeling of complex food products.

Main Methods:

  • Literature review and database analysis of known plant allergens.
  • Classification of PR-proteins into 14 families.
  • Identification of sequence similarities between allergens and PR-protein families.

Main Results:

  • Plant allergens share sequence similarities with PR-protein families 2, 3, 4, 5, 8, 10, and 14.
  • PR-proteins and allergens are typically small, stable at low pH, and resistant to proteolysis.
  • These characteristics make PR-proteins potential candidates for triggering immune responses.

Conclusions:

  • Identifying PR-proteins with allergenic potential is crucial for allergic patients and disease management.
  • Genetically modified plant-derived foods require careful evaluation for potential allergenicity.
  • Complex plant-derived foods need analysis for hidden allergens and appropriate labeling.

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