Component-resolved in vitro diagnosis of carrot allergy in three different regions of Europe.
Allergy
; 67(6): 758-66, 2012 Jun.
Article
in En
| MEDLINE
| ID: mdl-22486768
ABSTRACT
BACKGROUND:
Carrot is a frequent cause of food allergy in Europe. The objective of this study was to evaluate a panel of carrot allergens for diagnosis of carrot allergy in Spain, Switzerland and Denmark.METHODS:
Forty-nine carrot allergic patients, 71 pollen allergic but carrot-tolerant patients and 63 nonatopic controls were included. Serum IgE to carrot extract, recombinant carrot allergens (rDau c 1.0104; rDau c 1.0201; rDau c 4; the isoflavone reductase-like proteins rDau c IFR 1, rDau c IFR 2; the carrot cyclophilin rDau c Cyc) were analyzed by ImmunoCAP.RESULTS:
The sensitivity of the carrot extract-based test was 82%. Use of the recombinant allergens increased the sensitivity to 90%. The Dau c 1 isoforms were major allergens for Swiss and Danish carrot allergic patients, the profilin rDau c 4 for the Spanish patients. The rDau c IFR 1 and rDau c IFR 2 were recognized by 6% and 20% of the carrot allergics, but did not contribute to a further increase of sensitivity. Among pollen allergic controls, 34% had IgE to carrot extract, 18% to each of rDau c 1.0104, rDau c 1.0201 and rDau c 4, 8% to rDau c IFR 1 and 7% to rDau c IFR 2. Sensitization to rDau c Cyc occurred in one carrot allergic patient and one nonatopic control.CONCLUSION:
Component-resolved in vitro analyses revealed a significant difference in IgE sensitization pattern between geographical regions and in the prevalence of sensitization to carrot components between carrot allergic and carrot-tolerant but pollen sensitized patients.
Full text:
1
Database:
MEDLINE
Main subject:
Plant Extracts
/
Daucus carota
/
Antigens, Plant
/
Food Hypersensitivity
Type of study:
Clinical_trials
/
Diagnostic_studies
/
Risk_factors_studies
Country/Region as subject:
Europa
Language:
En
Journal:
Allergy
Year:
2012
Type:
Article
Affiliation country:
Switzerland