Common mistakes around IgE Allergie Genetik

Common mistakes around IgE allergy genetics: Many people assume a genetic test can definitively predict whether they have an IgE-mediated allergy (e.g., to pollen, dust mites, or foods). In reality, genetic variants (e.g., in IL-4, IL-13, FCER1A, HLA) only indicate an increased probability of atopic predisposition—they are neither necessary nor sufficient for a clinical allergy. Another mistake is believing a negative genetic test rules out allergy. IgE allergies arise from complex gene–environment–exposure–immune system interactions. Moreover, most commercial tests are limited to a few SNPs and cannot assess actual IgE production or symptoms. Confusing sensitization (positive IgE in blood) with manifest allergy is also common: a positive IgE result without symptoms does not necessarily mean allergy. The evidence for the clinical relevance of many tested SNPs is weak or contradictory. Consumers should understand that such tests do not replace medical diagnosis; a physician’s evaluation (history, skin prick test, provocation) remains essential. Overall evidence level is 'unclear' to 'human-moderate'—GWAS exist for atopic diseases, but the predictive power of individual variants is low.