Analysis of the sensitization spectrum in patients with severe allergic diseases using the ImmunoCAP ISAC method

Abstract

BACKGROUND: An important advance in modern allergology has been made by the introduction of allergenic molecules/components, including their detection by the ImmunoCAP ISAC method. This method is useful in patients with a complex spectrum of sensitization and severe forms of allergic diseases, where various predictors of severe course are actively searched for. AIM: To evaluate the informativeness of component resolved diagnostic by ISAC ImmunoCAP method in patients with severe bronchial asthma and severe atopic dermatitis. MATERIALS AND METHODS: A single-center retrospective study was conducted from January to August 2023. 100 patients who were candidates for biologicals for severe bronchial asthma (group 1; 63 patients), severe atopic dermatitis (group 2; 20 patients), or their combination (group 3; 17 patients) were included. Component restlved diagnostic was performed by ImmunoCAP ISAC method. RESULTS: Polysensitization and high occurrence of food and fungal allergens were more frequently detected in the groups of patients with severe atopic dermatitis. When analyzing the pollen sensitization spectrum in groups 2 and 3, Bet v 1 and PR-10 family cross-linked molecules (Mal d 1, Pru p 1, Ara h 8, Gly m 4, Cor a 1.04), as well as Ole e 9, Cyn d 1, Ph p 1 and Par j 2 were the most common. Epidermal allergens were common in all three groups. Lipocains (Can f 1, Can f 4, Can f 6, Ecu q 1, Mus m 1), kallikreins (Can f 5), and albumin (Fel d 2) dominated among them. The presence of sensitization to household allergens was detected only in group 2 and only to the molecule Der p 23. Among fungal allergens, the allergen Asp f 6 was predominant in the groups with severe atopic dermatitis, and the component Alt a 1 in patients with severe bronchial asthma. Among food allergens, one of the most common allergens was the molecule Gad c 1, Gal d 1, Gal d 2, Gal d 5 and Bos d 6. CONCLUSION: Component resolved diagnostic is an accurate assay suitable for determining the spectrum of sensitization in patients; its result can serve as a distinct biomarker for severe allergic diseases.