TY - JOUR

T1 - Immunoglobulin-E reactivity to a glycosylated food allergen (peanuts) due to interference with cross-reactive carbohydrate determinants in heavy drinkers

AU - Vidal, C

AU - Vizcaino, L

AU - Díaz-Peromingo, J A

AU - Garrido, M

AU - Gomez-Rial, J

AU - Linneberg, A

AU - Gonzalez-Quintela, A

N1 - Keywords: Adult; Aged; Aged, 80 and over; Alcohol Drinking; Allergens; Arachis hypogaea; Biological Markers; Carbohydrates; Cross Reactions; Female; Glycosylation; Humans; Immunoglobulin E; Male; Middle Aged; Peanut Hypersensitivity; Polysaccharides; Young Adult

PY - 2009

Y1 - 2009

N2 - BACKGROUND: N-glycans in plant and invertebrate glycoproteins can induce extensive IgE cross-reactivity therefore limiting the specificity of in vitro allergy tests. IgE sensitization to N-glycans (cross-reactive carbohydrate determinants, CCDs) may be increased in heavy drinkers, who therefore show IgE reactivity to aeroallergens, latex, and Hymenoptera venoms. The peanut, a CCD-bearing allergen, is the leading cause of severe food allergic reactions in many populations. AIM OF THE STUDY: To investigate the potential interference of CCDs with determinations of IgE to peanuts in heavy drinkers. METHODS: We determined IgE to peanuts and IgE to a CCD marker (MUXF(3), the N-glycan from bromelain) in 41 heavy drinkers admitted to the hospital and 54 healthy controls. None of the participants reported symptoms of peanut allergy. In cases with positive (>or=0.35 kU/l) IgE to peanuts, we performed inhibition assays with a neoglycoprotein consisting of MUXF(3) molecules coupled to bovine serum albumin (MUXF(3)-BSA) and a similar neoglycoprotein lacking xylose and fucose (MM-BSA). In the same cases, we screened for IgE to a panel of recombinant nonglycosylated peanut allergens. SDS-PAGE immunoblotting and inhibition assays were performed in selected cases. RESULTS: The prevalence of positive IgE to peanuts was 22 and 3.7% in heavy drinkers and healthy controls, respectively (p < 0.001). Peanut-IgE positivity was closely related to the presence of IgE to CCDs. In most (8/9) heavy drinkers with positive IgE to peanuts, reactivity was inhibited by preincubation with MUXF(3)-BSA, but not with MM-BSA. IgE binding to multiple bands on immunoblotting studies was also inhibited by MUXF(3)-BSA preincubation. IgE to nonglycosylated recombinant peanut allergens was uniformly negative. CONCLUSION: Heavy drinking is associated with clinically asymptomatic IgE reactivity to peanuts, a relevant food allergen, in relation to CCD interference.

AB - BACKGROUND: N-glycans in plant and invertebrate glycoproteins can induce extensive IgE cross-reactivity therefore limiting the specificity of in vitro allergy tests. IgE sensitization to N-glycans (cross-reactive carbohydrate determinants, CCDs) may be increased in heavy drinkers, who therefore show IgE reactivity to aeroallergens, latex, and Hymenoptera venoms. The peanut, a CCD-bearing allergen, is the leading cause of severe food allergic reactions in many populations. AIM OF THE STUDY: To investigate the potential interference of CCDs with determinations of IgE to peanuts in heavy drinkers. METHODS: We determined IgE to peanuts and IgE to a CCD marker (MUXF(3), the N-glycan from bromelain) in 41 heavy drinkers admitted to the hospital and 54 healthy controls. None of the participants reported symptoms of peanut allergy. In cases with positive (>or=0.35 kU/l) IgE to peanuts, we performed inhibition assays with a neoglycoprotein consisting of MUXF(3) molecules coupled to bovine serum albumin (MUXF(3)-BSA) and a similar neoglycoprotein lacking xylose and fucose (MM-BSA). In the same cases, we screened for IgE to a panel of recombinant nonglycosylated peanut allergens. SDS-PAGE immunoblotting and inhibition assays were performed in selected cases. RESULTS: The prevalence of positive IgE to peanuts was 22 and 3.7% in heavy drinkers and healthy controls, respectively (p < 0.001). Peanut-IgE positivity was closely related to the presence of IgE to CCDs. In most (8/9) heavy drinkers with positive IgE to peanuts, reactivity was inhibited by preincubation with MUXF(3)-BSA, but not with MM-BSA. IgE binding to multiple bands on immunoblotting studies was also inhibited by MUXF(3)-BSA preincubation. IgE to nonglycosylated recombinant peanut allergens was uniformly negative. CONCLUSION: Heavy drinking is associated with clinically asymptomatic IgE reactivity to peanuts, a relevant food allergen, in relation to CCD interference.

U2 - 10.1111/j.1530-0277.2009.00961.x

DO - 10.1111/j.1530-0277.2009.00961.x

M3 - Journal article

C2 - 19413651

VL - 33

SP - 1322

EP - 1328

JO - Alcoholism: Clinical and Experimental Research

JF - Alcoholism: Clinical and Experimental Research

SN - 0145-6008

IS - 8

ER -