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The pathogenesis of rosacea is not fully understood. In this disease, the release of inflammatory molecules and overgrowth of skin-colonizing microorganisms, including fungal microbiota, are noted. The study of the frequency of occurrence and the nature of the spectrum of sensitization to fungal allergens in patients with rosacea is of particular interest and accounts for relevance of the study. Purpose of the study: to analyze the frequency of occurrence and the nature of the spectrum of sensitization to fungal allergens in patients with rosacea. Materials and methods. The study included patients with rosacea aged 18 to 60 years (group 1, n = 31). All patients underwent a specific allergic examination: collected allergic history, skin prick testing using the following allergens: nutritional yeast, Candida albicans, Alternaria alternate, Aspergillus fumigatus, Cladosporium herbarum, Penicillium notatum (Allergopharma, Germany). Concentration of total immunoglobulin E (IgE) and eosinophilic cationic protein in blood serum was measured in indirect immunofluorescence analysis with Thermo Scientific Multiskan FC semi-automatic analyzer. Statistica 8.0 software package was used for statistical analysis. Results. Analysis of the features of the spectrum of sensitization to fungal allergens in the group of patients with rosacea showed that the most significant allergens are Cladosporium herbarum (74.2% of patients) and Candida albicans (58.1%). Sensitization to nutritional yeast and Penicillium notatum was detected in almost half of the patients. The concentration of total immunoglobulin E in blood serum in the group of patients with rosacea was 79.4 IU/ml [23.4; 105.1], in the control group 45.1 IU/ml [23.4; 144.0]. The concentration of eosinophilic cationic protein in blood serum in the group of patients with rosacea was significantly higher compared to the control group: 50.3 ng/ml [43.0; 62.0] and 7.9 ng/ml [4.6; 27.1], respectively. After skin prick testing with fungal allergens, patients with rosacea were prescribed an individual elimination diet with the exclusion of causally significant allergens for a period of 1 month. In 61.2% (n = 19) of cases in patients with rosacea, a positive elimination effect was noted: a significant decrease in the severity of erythema, papules and pustules in the face. Conclusion. Thus, the study revealed a high incidence of fungal allergy and established the features of the spectrum of sensitization to fungal allergens in patients with rosacea. The most significant fungal allergens in rosacea are fungi of the genus Cladosporium herbarum, Candida albicans, Penicillium notatum as well as nutritional yeast.
The pathogenesis of rosacea is not fully understood. In this disease, the release of inflammatory molecules and overgrowth of skin-colonizing microorganisms, including fungal microbiota, are noted. The study of the frequency of occurrence and the nature of the spectrum of sensitization to fungal allergens in patients with rosacea is of particular interest and accounts for relevance of the study. Purpose of the study: to analyze the frequency of occurrence and the nature of the spectrum of sensitization to fungal allergens in patients with rosacea. Materials and methods. The study included patients with rosacea aged 18 to 60 years (group 1, n = 31). All patients underwent a specific allergic examination: collected allergic history, skin prick testing using the following allergens: nutritional yeast, Candida albicans, Alternaria alternate, Aspergillus fumigatus, Cladosporium herbarum, Penicillium notatum (Allergopharma, Germany). Concentration of total immunoglobulin E (IgE) and eosinophilic cationic protein in blood serum was measured in indirect immunofluorescence analysis with Thermo Scientific Multiskan FC semi-automatic analyzer. Statistica 8.0 software package was used for statistical analysis. Results. Analysis of the features of the spectrum of sensitization to fungal allergens in the group of patients with rosacea showed that the most significant allergens are Cladosporium herbarum (74.2% of patients) and Candida albicans (58.1%). Sensitization to nutritional yeast and Penicillium notatum was detected in almost half of the patients. The concentration of total immunoglobulin E in blood serum in the group of patients with rosacea was 79.4 IU/ml [23.4; 105.1], in the control group 45.1 IU/ml [23.4; 144.0]. The concentration of eosinophilic cationic protein in blood serum in the group of patients with rosacea was significantly higher compared to the control group: 50.3 ng/ml [43.0; 62.0] and 7.9 ng/ml [4.6; 27.1], respectively. After skin prick testing with fungal allergens, patients with rosacea were prescribed an individual elimination diet with the exclusion of causally significant allergens for a period of 1 month. In 61.2% (n = 19) of cases in patients with rosacea, a positive elimination effect was noted: a significant decrease in the severity of erythema, papules and pustules in the face. Conclusion. Thus, the study revealed a high incidence of fungal allergy and established the features of the spectrum of sensitization to fungal allergens in patients with rosacea. The most significant fungal allergens in rosacea are fungi of the genus Cladosporium herbarum, Candida albicans, Penicillium notatum as well as nutritional yeast.
Background. Psoriasis is a chronic relapsing systemic disease characterized by inflammation in the skin. Etiology of psoriasis remains elusive, since there are many factors triggering a pathological process in the skin. Data on the frequency of allergies in patients with psoriasis are extremely few and contain conflicting results in the literature, which determines the relevance of the study. Researchers described coexisting atopic dermatitis (AD) and psoriasis (PS), which does not exclude common causes and mechanisms leading to skin damage. Aim. To study and conduct a comparative analysis of food allergen sensitization patterns in patients with psoriasis and atopic dermatitis. Materials and methods. A prospective study included patients with psoriasis (group 1, n = 51) and atopic dermatitis (group 2, comparison group, n = 20) aged 18–57 years. A control group (group 3, n = 19) encompassed apparently healthy sex- and age-matched individuals. Specific allergy testing included allergy history and determination of sensitization patterns by analyzing serum concentrations of total immunoglobulin E (IgE) and allergen-specific IgE (sIgE) to food allergens using ELISA test systems (Alkor-Bio, Russia) on the Thermo Scientific Multiskan FC microplate photometer. The calculation and analysis of the obtained data were carried out using the Statistica 8.0 software package. Results. The concentration of total immunoglobulin E in the blood serum for PS patients was 57.9 [31.6; 135.1] IU / ml, for AD patients – 210.4 [56.2; 1,000.0] IU / ml, and for the control group – 45.1 [23.4; 144.0] IU / ml, respectively, р1, 2 = 0.005; р2,.3 = 0.001; р1, 3 = 0.4. Food allergen sensitization was determined significantly more often in the group of AD patients compared to the group of PS patients: 95.0 (n = 19) vs. 37.2% (n = 19), respectively, р1, 2 = 0.005. In the group of AD patients, sensitization to chicken eggs, tomatoes, and peanuts was found significantly more frequently than in the group of PS patients and in the control group. Sensitization to beef, buckwheat, and potatoes was significantly more common in the group of PS patients than in the controls. Conclusion. Following the study of the serum concentration of allergen-specific IgE (sIgE) to food allergens, we revealed food allergen sensitization not only for AD patients, but also for PS patients. However, in our study, sensitization patterns to the studied allergens have their own characteristics depending on the specific disease.
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