Chronic-induced urticaria is a group of diseases characterized by the occurrence of itchy wheals and/or angioedema in response to specific triggers, such as mechanical irritation, exposure to high and low temperatures, vibration, and ultraviolet radiation of various spectra, appearing for 6 weeks. This group of diseases is characterized by a long duration, a significant effect on the patients quality of life, and the risk of severe life-threatening reactions. The diagnosis of induced urticaria and patient-safe reproduction of symptoms by exposure to a trigger (temperature, mechanical, etc.). Currently, no medical devices have been registered in the Russian Federation for the threshold diagnosis of most physical forms of urticaria. Consequently, diagnosing and dynamic monitoring the state of these patients and their response to treatment are challenging. The question of therapy for chronic-induced urticaria also remains open due to the insufficient effectiveness of the recommended and available treatment methods. This article provides a review of current literature data. This article provides a review of current literature data.

BACKGROUND: Few works were devoted to the study of the role of cytokines in children with allergic rhinitis (AR) with comorbid obesity. AIMS: To study the level of cytokines interleukin (IL)1, IL-33, IL-6, tumor necrosis factor (TNF)-, and total IgE in the blood serum of overweight/obese children with intermittent and persistent AR. MATERIALS AND METHODS: This cross-sectional observational study analyzed 69 children aged 710 years with AR in the remission period and was conducted from November 2020 to February 2021. All children went through a comprehensive examination for 3 days, including the definition of the serum concentrations IL-1, IL-33, IL-6, TNF-, and total IgE. Before blood sampling, children did not use nasal glucocorticosteroids, antileukotriene drugs for the last 4 weeks, and antihistamines for the last 7 days. Bioimpedansometry was used to assess the body weight by calculating the %FM (percentage of body fat mass). RESULTS: The study included 44 children with AR and overweight/obesity (group I) and 25 children with AR and normal body weight (group II). The analysis of AR showed that in group I, intermittent AR was detected in 11 (25.0%) children (subgroup IA), whereas a persistent course was found in 33 children (75.0%) (subgroup IB). In group II, intermittent AR was detected in 13 (52.0%) children (subgroup IIA), whereas persistent AR in 12 children (48.0%) (subgroup IIB). The level of IL-1 in the blood serum was significantly higher in the subgroup IB than in subgroup IA (p=0.009). The concentration of IL-33 in children with persistent AR and obesity was significantly lower than that in children with intermittent AR and obesity (p=0.039). The level of IL-33 in the serum negatively correlated with %FM in group IA (r=-0.6673, p=0.035). The concentration of IL-1 negatively correlated with %FM in group IIB (r=-0,738, p=0,037). The levels of IL-6, TNF, and total IgE in obese children did not depend on the severity of AR. CONCLUSIONS: The predictors of persistent AR in children with obesity are a decrease in the level of IL-33 and an increase in IL-1 in the blood serum. The negative correlation between the degree of obesity and IL-33 concentration in children with intermittent AR opens a window of opportunity for the personified management of children with AR and comorbid obesity.

BACKGROUND: Food allergy (FA) is an urgent problem for public health worldwide. This disease reduces the quality of life of patients and increases the risk of developing unpredictable anaphylactic reactions. AIM: Conduct an analysis of genetic studies in cohorts of patients with FA aimed at assessing the role of genetic factors in the development of this pathology. MATERIALS AND METHODS: The results of genome-wide association studies aimed at studying the influence of genetic factors in FA development. The review includes original articles published for the period from January 1, 2012 to December 31, 2021. RESULTS: This systematic review analyzed data on the relationship of genetic variations associated with FA. Eight studies were analyzed, and the maximum effect with the development of IgE-mediated FA on peanuts was found for the rs10018666 variant of the SLC2A9 gene in Europeans. Some allergens associated with specific loci have been found, for example, variants rs9273440 (HLA-DQB1), rs115218289 (ITGA6), rs10018666 (SLC2A9), and others are unique to peanut. Associated variants are predominantly associated with disorders of the innate/adaptive immune response and functioning of the epithelial barrier, confirming their leading role in FA development. In addition to associations with FA, most of the identified genes affect the development of other allergic march phenotypes, including atopic dermatitis, bronchial asthma, allergic rhinitis, and non-allergic (type 2 diabetes mellitus, Parkinsons disease, myocardial infarction, and others) diseases. CONCLUSIONS: Summarizing the results of genome-wide associative studies, it should be noted that the development of food allergies involves variants localized both in known atopic and newly identified loci that are not related to the development of other allergic diseases. The peculiarities of the structure of food sensitization and the lack of research on the susceptibility to food allergies in Russia determine the direction of further scientific research in this area.

BACKGROUND: The basophil activation test (BAT) reflects the presence of IgE on the cell surface and can be a tool for monitoring the effectiveness of allergen-specific immunotherapy (ASIT). It is likely that spontaneous and allergen-induced BAT levels may change after effective subcutaneous immunotherapy (SCIT) and this is of clinical importance.
 AIMS: determination of basophil activation markers in patients sensitized to weed pollen during SCIT.
 MATERIALS AND METHODS: A real clinical study (2 years, 60 patients) with allergic rhinitis who underwent SCIT with weed allergens for 2 seasons. The proportion of basophils expressing CD203c spontaneously and after exposure to a trigger allergen was determined. BAT was performed before treatment, after the first and second courses of pre-season SCIT (0, 3, 15 months of treatment). The effectiveness of SCIT was assessed by the dynamics of the symptom scale (Rhinoconjunctivitis total symptom score) and the drug assessment (Daily medical score).
 RESULTS: SCIT with water-salt extracts was effective: median RTSS in patients after two courses decreased from 13.0 [10.0; 15.0] to 4.5 [3.00; 7.25] points (p 0.001), DMS score from 2.0 [2.0; 2.0] vs 1.0 [1.0; 2.0] points (p0.001).
 Spontaneous BAT remained unchanged after the first course of ASIT. Mean BAT values ​​before therapy and after the first course of SCIT did not differ (8.15 [6.10; 11.9] vs 9.0 [6.30; 12.0] %). After the second course of treatment, spontaneous BAT decreased (8.15 [6.10; 11.9] vs 6.20 [4.27; 9.00] %, 2 = 15.5, p0.001).
 Allergen-induced BAT decreased significantly from the first year of treatment. The overall change in the total group for BAT with ragweed after the first course of SCIT was 11.25 (CI 95 %: 7.10; 15.10) %, p 0.001. The overall difference in the induced ВAT test at the end of therapy reached 8.63 (CI 95: 5.30; 12.05) %, p 0.001. After the first course of therapy with mugwort allergens, the indices of induced BAT decreased by 12.0 (CI 95 %: 6.95; 17.90) %, p 0.001; after the second course, the difference from the initial values ​​was 9.67 (CI 95%: -6.85; 15.90) %, p0.001.
 CONCLUSIONS: SCIT with ragweed and mugwort allergens was effective. The change in spontaneous and induced BAT is associated with a positive effect of ASIT.

In recent years, the challenge of the control and maintenance of nutritional status in patients on an elimination diet for food allergies has got a lot of attention. Due to the possibility of long-term elimination of important food groups without adequate replacement, the high efficiency of this treatment method has been linked with the risk of nutritional deficiency, impaired physical growth, and eating behavior disorders in children. This review takes into account physical growth disorders in children with food allergies due to insufficient intake of micronutrients (vitamins, fatty acids), as well as such behavioral disorders as a distortion of food and taste preferences and food neophobia. We also discuss the problems of artificial mixture choice in children who are in their first year of life, correction of the diet in children over one year of age with micronutrient supplementation, as well as the results of studies on the quality of life of both children with elimination diets and people from their families.
 When prescribing an elimination diet, the doctor must constantly monitor the diet and growth indices of the child. It is necessary to take to into account the childs age, his nutritional requirements, and possible deficiencies of nutrients while planning the diet, as well as determine the necessary and sufficient diet duration.

Russian science has suffered a heavy loss. On March 11, 2022, Rakhim Musaevich Khaitov died - Academician of the Russian Academy of Sciences, Doctor of Medical Sciences, Professor, Honored Scientist of the Russian Federation, Scientific Director of the Federal State Budgetary Institution "SSC Institute of Immunology" of the Federal Medical and Biological Agency of Russia, Chief Allergist-Immunologist of the Ministry of Health of Russia, member of the Bureau of the Department of Physiology and Fundamental Medicine RAS, Head of the Department of Clinical Allergology and Immunology, Moscow State Medical University named after A.I. Evdokimov of the Ministry of Health of Russia.

BACKGROUND. T2 inflammation underlies non-allergic eosinophilic severe bronchial asthma and chronic rhinosinusitis with nasal polyposis (CRSwNP). Existing targeted anti-IL-5 drugs can improve clinical and functional parameters in patients with a combination of severe asthma and CRSwNP.
 AIM: to evaluate mepolizumab efficacy in patients with non-allergic severe asthma and concomitant inflammatory nasal diseases (CIND) in real clinical practice.
 MATERIALS AND METHODS. The study was conducted without a control group, by comparing related populations (before-after analysis) and based on the Sverdlovsk regional register of adult patients with severe asthma and CIND. The primary endpoint was asthma control achievement (ACT questionnaire) and decrease in the proportion of patients with uncontrolled severe asthma. The number of asthma exacerbations, emergency calls and hospitalizations, quality of life according to AQLQ questionnaire, peripheral blood eosinophils level and respiratory function (FEV1, FVC, FEV1/FVC) were also assessed. Dynamics of nasal symptoms was assessed using SNOT22 questionnaire and visual analogue scale (VAS).
 RESULTS. During 12 months of therapy with mepolizumab, ACT increased from 9 (Q1-Q3: 7-11) to 22 points (Q1-Q3: 21-24) (p0.001). The proportion of patients with uncontrolled asthma decreased from 100% to 10% (p0.001). The number of asthma exacerbations decreased from 3.182.8 per patient per year to 0 (p0.001) and hospitalizations from 0.570.9 per patient per year to 0 (p=0.007). Quality of life according to AQLQ increased from 3.481.05 (95% CI 2.734.24) to 5.590.88 (95% CI 4.966.22) points (p0.001). The number of blood eosinophils decreased from 442 (Q1-Q3: 336-853) to 90 (Q1-Q3: 73-117) cells/l (p0.001). There was increase in FEV1 from 63.9%24.2 (95% CI 46.681.2) to 80.5%18.3 (95% CI 67.493.6) (p=0.015). There was decrease in SNOT22 questionnaire score by 33 points (from 4530 to 2215) (p=0.006) and decrease in VAS score by 5 points (from 8 (Q1-Q3: 5-8) to 3 (Q1-Q3: 3-5)) (p=0.017).
 CONCLUSIONS. According to the study results, there were asthma control improvement, asthma exacerbations decrease, quality of life improvement according to AQLQ. Statistically significant peripheral blood eosinophils decrease and respiratory function improvement were also revealed. In patients with CIND, significant improvement in nasal breathing was noted, which was confirmed by scores of SNOT22 and VAS questionnaires.

Today, the prevalence rates of atopic dermatitis are very different worldwide. Epidemiological data are primarily influenced by factors such as the lack of a unified approach to the definition of the disease, study design, disease codes, diagnosis, research methods, etc. In addition, it is important what is the severity of atopic dermatitis and the accuracy of the diagnosis. The use of records in electronic records and prescribed prescriptions also indicate insufficiently accurate identification of such patients. It is necessary to clarify the clinical signs of atopic dermatitis, and the codes of diseases, including those misdiagnosed as atopic dermatitis, which directly affects the epidemiology of this disease.

The progressively increased incidence of atopic dermatitis among children and increased persistence in adulthood, combined with an inevitably decreased quality of life of patients, determine the relevance of studying the development mechanisms of this disease not only for dermatology but also for the entire health care system. Thus, the prerequisites for the emergence of new pathogenetic concepts and the search for the most effective therapeutic modalities arise. Currently, atopic dermatitis is considered as the interaction of endogenous (impaired immune response and insufficient epidermal barrier function) and exogenous (exposure to allergens, chemical or physical irritants, and microorganisms) factors.
 Environmental factors, such as temperature and humidity, genetic makeup, antibiotic use, and good hygiene, play a critical role in skin microbiome maintenance and stability. Normally, the skin microbiota is mainly formed by bacteria of the genus Staphylococcus, Propionibacterium, Corynebacterium, and Streptococcus. In 70% of patients with atopic dermatitis, colonization of Staphylococcus aureus is observed on the affected skin, whereas on the unaffected skin in 39%, which secondarily contributes to the development of immune imbalance and increased skin xerosis. This fact determines the importance of basic therapy, which, on one hand, helps to strengthen the epidermal barrier, and on the other, normalizes the microbiome of the skin, thereby reducing the colonization of Staphylococcus aureus.
 The normal skin microbiome suppresses the activity of immune-inflammatory responses and regulates pH, lipid synthesis, and transepidermal water loss. Thus, skin microbiome normalization is the key to successful therapy and long-term remission of atopic dermatitis.