Influence of the allelic variants encoded at the Gli-B1 locus, responsible for a major allergen of wheat, on IgE reactivity for patients suffering from food allergy to wheat.
Wheat presents an important genetic diversity that could be useful to look for cultivars with reduced allergencity. omega5-Gliadins have been described as major allergens for wheat allergic patients suffering from wheat-dependent exercise-induced anaphylaxis (WDEIA) and some cases of chronic urticaria (U). Our objective was to study the influence of genetic variability at the Gli-B1 locus encoding for omega5-gliadins on the reactivity of IgE antibodies from these patients. We selected cultivars expressing 13 alleles at Gli-B1 including a wheat/rye translocation and studied the reactivity to gliadins of a rabbit antiserum specific for omega5-gliadins and of IgE from 10 patients. The antiserum and IgE from nine patients with WDEIA and U strongly detected omega5-gliadins expressed by most of the Gli-B1 alleles but showed no or faint responses to the gliadins and secalins extracted from the translocated wheat. The selection of genotypes lacking the Gli-B1 locus may reduce wheat allergenicity.
Denery-Papini
Sandra
S
Unité de Recherche sur les Biopolymères, leurs Interactions et Assemblages (BIA), INRA, Rue de la Géraudière, BP 71627, 44316 Nantes cedex 3, France. denery@nantes.inra.fr
Lauriére
Michel
M
Branlard
Gérard
G
Morisset
Martine
M
Pecquet
Catherine
C
Choudat
Dominique
D
Merlino
Marielle
M
Pineau
Florence
F
Popineau
Yves
Y
Boulenc
Elodie
E
Bouchez-Mahiout
Isabelle
I
Bodinier
Marie
M
Moneret-Vautrin
Denise-Anne
DA
D000328:Adult; D000368:Aged; D000483:Alleles; D000485:Allergens / Q000032:analysis / Q000235:genetics* / Q000276:immunology*; D000707:Anaphylaxis / Q000276:immunology; D000818:Animals; D052179:Antigens, Plant; D015444:Exercise; D005512:Food Hypersensitivity / Q000276:immunology*; D014644:Genetic Variation / Q000276:immunology*; D005903:Gliadin / Q000032:analysis / Q000235:genetics* / Q000276:immunology*; D006801:Humans; D007106:Immune Sera / Q000276:immunology; D007073:Immunoglobulin E / Q000276:immunology*; D008875:Middle Aged; D011817:Rabbits; D014908:Triticum / Q000737:chemistry / Q000276:immunology; D014581:Urticaria / Q000276:immunology
D000485:Allergens; D052179:Antigens, Plant; D007106:Immune Sera; C475180:omega-5 gliadin, wheat; D007073:Immunoglobulin E; D005903:Gliadin