Occurrence Of Atopic Dermatitis Research Articles

Tape Stripping - Searching for Minimally Invasive Biomarkers in Atopic Dermatitis.

Atopic dermatitis (AD) is nowadays entering a new era of more targeted treatments. However, to make personalized medicine, which we are currently striving for, a reality, a reliable set of validated biomarkers is needed. The most practical seem to be biomarkers that can be obtained easily and minimally invasively. Tape stripping (TS) is a method that provides such an opportunity. This review summarizes the potential biomarkers of AD identified by the minimally invasive TS method. Thymic stromal lymphopoietin (TSLP), interleukin (IL)-13, CC chemokine ligand 17 (CCL17)/thymus and activation-regulated chemokine (TARC) and stratum corneum (SC) lipids can be used as predictive biomarkers for AD occurrence. CCL17/TARC also holds great promise for being reliable biomarkers for AD severity as well as treatment response. Nitric oxide synthase 2 (NOS2)/inducible nitric oxide synthase (iNOS) which high expression is specific for psoriasis may be a good biomarker for differential diagnosis between psoriasis and AD in challenging clinical situations. AD children with food allergy (FA) have a unique endotype characterized by selectively altered expression of various molecules in the skin that can indicate FA coexistence. Unfortunately, although numerous potential biomarkers have been found, none of these candidates have been validated and implemented into routine clinical practice, which still separates us from the possibility of a precise approach to AD patients.

Association between CCL5, CCL11, and CCL17 polymorphisms and atopic dermatitis risk: A systematic review and meta-analysis.

Atopic dermatitis (AD) is a common and recurrent inflammatory disease with strong genetic susceptibility. The abnormal production of chemokines plays an important role in the occurrence and development of AD. A comprehensive online literature search was performed in databases of China National Knowledge Infrastructure, Wanfang, VIP China Science and Technology Journal Database, China Biomedical Literature Database, PubMed, Embase and Cochrane Library to retrieve relevant articles published from January 2000 to October 2022. The odds ratio (OR) with its 95% confidence interval (CI) was employed to calculate this relationship. A total of 7 studies were finally screened out, including 1316 AD patients and 1099 controls. There were 3 studies for CC chemokine ligand 5 (CCL5) polymorphisms, 2 for CCL11 polymorphisms, and 2 for CCL17 polymorphisms, respectively. The meta-analysis revealed a significant association between the CCL5 - 403G/A polymorphism and AD under the allelic model (A vs G: OR = 1.25, 95% CI = 1.02-1.52, P = .03), heterozygous model (AG vs GG: OR = 1.40, 95% CI = 1.08-1.80, P = .01) and dominant model (AA + AG vs GG: OR = 1.38, 95% CI = 1.08-1.76, P = .01) in a fixed-effect model. The allelic model (G vs C: OR = 1.46, 95% CI = 1.07-1.98, P < .01) and dominant model (GG + GC vs CC: OR = 1.74, 95% CI = 1.23-2.47, P < .001) of the CCL5 - 28C/G polymorphism were also associated with an increased risk of AD. However, this significant association was not found in other alleles and genotypes (P > .05). Our results show that the A allele, AG and AA + AG genotypes of the CCL5 - 403G/A polymorphism, the G allele and GG + GC genotype of the CCL5 - 28C/G polymorphism are risk factors for AD. Future studies with large population are still needed to further explore those correlations.

Association between a maternal vegetarian diet during pregnancy and the occurrence of atopic dermatitis in children.

Atopic dermatitis (AD) is rising globally, with genetics and environmental factors both playing crucial roles. Dietary habits during pregnancy are linked to children's allergic disease risk. However, limited studies have explored the association between maternal vegetarian diets during pregnancy and child AD. Therefore, this study aimed to examine the relationship between maternal vegetarian diets during pregnancy and the occurrence of AD in children. In this study, the Taiwan Birth Cohort Study (TBCS) database was used, comprising a representative national birth cohort of infants born in Taiwan in 2005. Of 24,200 mother-child pairs in the database, 20,172 completed face-to-face interviews at 6 and 18 months. Employing a 1:10 matching strategy based on maternal age, education level, and child sex, 408 mothers who followed a vegetarian diet during pregnancy were matched with 4080 nonvegetarian mothers. This resulted in a final dataset of 4488 subjects. Logistic regression was used to explore the association between maternal vegetarian diets during pregnancy and the occurrence of AD in children. Among the TBCS participants, there were 292 (1.8%) mothers who adhered to lacto-ovo vegetarianism and 116 (0.7%) mothers who adhered to veganism, totaling 408 (2.4%) vegetarians during pregnancy. Compared to children of nonvegetarian mothers, children of mothers who followed a vegetarian diet during pregnancy showed a lower risk of developing AD before 18 months of age (OR = 0.65, 95% CI = 0.45-0.93, p = 0.018). This study suggests that a vegetarian diet during pregnancy may lower the risk of AD in children. It is essential to carry out long-term follow-up to fully understand the impact of a mother's diet on allergic conditions.

Identification and preliminary validation of potential biomarkers in the peripheral blood mononuclear cells of atopic dermatitis

Objective: To explore the difference of peripheral blood mononuclear cells (PBMC) transcripts between atopic dermatitis (AD) and healthy controls, and to screen and preliminarily validate potential biomarkers of AD. Methods: From January 2021 to May 2022, blood samples from 9 AD patients and 10 healthy controls were collected from the Dermatology and Cosmetic Center of the Third Affiliated Hospital of Chongqing Medical University, ribonucleic acid-sequencing (RNA-seq) was used to determine the transcriptome and relative expression of PBMC, the differentially expressed genes (DEGs) were analyzed by gene ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) and protein-protein interaction networks (PPI) analysis, and the potential biomarkers were identified by quantitative real-time PCR (qRT-PCR). Results: The age of patients in the AD group [M (Q1, Q3)] was 26.50 (22.75, 30.50) years old, and the course of disease [M (Q1, Q3)] was 15 (10, 20) years,and the age of the healthy control group [M (Q1, Q3)] was 37.00 (27.75, 40.25) years old. Compared with healthy controls, 1 044 DEGs were detected in PBMC samples in AD group, including 668 up-regulated genes and 376 down-regulated genes. Differential variable splicing (AS) showed that mutually exclusive exons (46.74%) and skipped exon (31.01%) accounted for a large proportion. GO and KEGG enrichment analysis revealed that AD is closely linked to DEGs implicated in the inflammatory response and cytokine interaction and signal pathway. Comprehensive enrichment analysis and PPI analysis selected the expression of 8 candidate genes (CCL4, CCR3, CXCR5, NFKBIA, CXCL1, IL-1B, CCL20, LY96), which was confirmed by qRT-PCR and were consistent with that of RNA-seq. Conclusions: CCL4, CCR3, CXCR5, NFKBIA, CXCL1, IL-1B, CCL20 and LY96 might be potential biomarkers of AD, participating in the occurrence and development of AD.

Differential changes in the gut microbiota between extrinsic and intrinsic atopic dermatitis

Elevated serum level of total and (or) allergen-specific IgE is one of the key features of atopic dermatitis (AD). Previous studies have shown that the gut microbiome mediates interactions between external exposures and the immune system in AD; however, the relationship between the gut microbiota and IgE remains unclear. In the present study, analyses of environmental exposures for 250 AD patients and 138 healthy volunteers revealed an association between hygiene levels in the residential environment and the occurrence of AD and the IgE level. Metagenomic sequencing of the gut microbiota from 68 AD patients and 77 healthy controls showed that AD patients had a distinct gut microbiota composition; moreover, while L-histidine degradation was enriched in healthy controls, L-histidine biosynthesis was enriched in AD patients. Extrinsic and intrinsic AD showed different enrichment patterns of specific microbes and differential associations of functional pathways. Our study indicated that elevated levels of IgE in AD were related to specific microbes in the gut microbiota, which showed extensive interactions with environmental factors.

The Associations of Single Nucleotide Polymorphisms of the COL3A1, COL6A5, and COL8A1 Genes with Atopic Dermatitis.

The pathophysiology of atopic dermatitis (AD) is complex, multifactorial, and not fully understood. Genes encoding collagens, the most abundant proteins in the extracellular matrix (ECM), may play a potential role in the pathogenesis of AD. Our study aimed to estimate the associations between Col3A1/rs1800255, Col6A5 /29rs12488457, and Col8A1/rs13081855 polymorphisms and the occurrence, course, and features of AD in the Polish population. Blood samples were collected from 157 patients with AD and 111 healthy volunteers. The genotype distribution of the investigated collagens genes did not differ significantly between the AD and control subjects (p > 0.05). The AA genotype of Col3A1/rs1800255 was significantly associated with the occurrence of mild SCORAD (OR = 0.16; 95% Cl: 0.03-0.78; p = 0.02) and mild pruritus (OR = 18.5; 95% Cl: 3.48-98.40; p = 0.0006), while the GG genotype was significantly associated with severe SCORAD (OR = 6.6; 95% Cl: 1.23-32.35; p = 0.03). Regarding Col6A5/29rs12488457 polymorphism, the average SCORAD score was significantly lower in the group of patients with genotype AA than in patients with the AC genotype (39.8 vs. 53.4; p = 0.04). Nevertheless, both average SCORAD scores were high, and represent the moderate and severe grades of the diseases, respectively. The single nucleotide polymorphisms (SNPs) of COL3A1/ rs1800255 and Col6A5/29rs12488457 seem to be associated with AD courses and symptoms, suggesting new disease biomarkers. The modulation of collagens, the major component of the ECM, may serve as a therapeutic target of AD in the future.

High plasma dopamine level as a risk factor for atopic dermatitis

Background: Dopamine is responsible for inflammatory response and plays a role in the skin immune system by modulating T-cells, dendritic cells, and keratinocytes which increases skin inflammatory response in atopic dermatitis (AD). Elevation of dopamine level will affect IL-6, IL-8, IL-23, Th-17, and TNF-α, which promotes keratinocyte proliferation and differentiation, infiltration of inflammatory cells, angiogenesis, vasodilation, and skin barrier disruption on AD.&#x0D; Objective: This study aimed to establish whether the increase of plasma dopamine level contributes to a risk factor for AD occurrence.&#x0D; Methods: This is a matched-pair case-control observational analytical study which involves patients with AD and without AD as control. Samples were taken using a consecutive sampling method which fulfilled inclusion and exclusion criteria, matched for gender and age. Plasma dopamine level was measured from venous blood and processed using enzyme-linked immunosorbent assay (ELISA) method. The collected data were then analysed using SPSS version 20.0 with Pearson chi-square test for the odds ratio.&#x0D; Results: A total of 30 samples with AD (case group) and 30 samples without AD (control group) involved in this study. This study proves that plasma dopamine levels in the case group were significantly higher than the control group (p&lt;0.05). Odds ratio for plasma dopamine was 42.2 (95%CI: 9.5-187.2, p &lt; 0.001).&#x0D; Conclusion: This study concludes that high plasma dopamine level is a risk factor for AD.

Skin biomarkers predict development of atopic dermatitis in infancy.

There is currently no insight into biomarkers that can predict the onset of pediatric atopic dermatitis (AD). Nested in a prospective birth cohort study that examined the occurrence of physician-diagnosed AD in 300 children, 44 random children with onset of AD in the first year of life were matched on sex and season of birth with 44 children who did not develop AD. Natural moisturizing factor (NMF), corneocyte surface protrusions, cytokines, free sphingoid bases (SBs) of different chain lengths and their ceramides were analyzed from tape strips collected at 2months of age before onset of AD using liquid chromatography, atomic force microscopy, multiplex immunoassay, and liquid chromatography mass spectrometry, respectively. Significant alterations were observed for four lipid markers, with phytosphingosine ([P]) levels being significantly lower in children who developed AD compared with children who did not (median 240 pmol/mg vs. 540 pmol/mg, p < 0.001). The two groups of children differed in the relative amounts of SB of different chain lengths (C17, C18 and C20). Thymus- and activation-regulated chemokine (TARC/CCL17) was slightly higher in children who developed AD, whereas NMF and corneocyte surface texture were similar. AD severity assessed by the eczema area and severity index (EASI) at disease onset was 4.2 (2.0;7.2). [P] had the highest prediction accuracy among the biomarkers (75.6%), whereas the combination of 5 lipid ratios gave an accuracy of 89.4%. This study showed that levels and SB chain length were altered in infants who later developed AD, and that TARC/CCL17 levels were higher.

Der p 23-specific IgE response throughout childhood and its association with allergic disease: A birth cohort study.

The Dermatophagoides pteronyssinus molecule Der p 23 is a major allergen whose clinical relevance has been shown in cross-sectional studies. We longitudinally analysed the trajectory of Der p 23-specific IgE antibody (sIgE) levels throughout childhood and youth, their early-life determinants and their clinical relevance for allergic rhinitis and asthma. We obtained sera and clinical data of 191 participants of the German Multicentre Allergy Study, a prospective birth cohort. Serum samples from birth to 20 years of age with sIgE reactivity to Der p 23 in a customised semiquantitative microarray were newly analysed with a singleplex quantitative assay. Early mite exposure was assessed by measuring the average content of Der p 1 in house dust at 6 and 18 months. Der p 23-sIgE levels were detected at least once in 97/191 participants (51%). Prevalence of Der p 23 sensitisation and mean sIgE levels increased until age 10 years, plateaued until age 13 years and were lowest at age 20 years. Asthma, allergic rhinitis (AR) and atopic dermatitis (AD) were more prevalent in Der p 23-sensitised children, including those with monomolecular but persistent sensitisation (11/97, 11%). A higher exposure to mites in infancy and occurrence of AD before 5 years of age preceded the onset of Der p 23 sensitisation, which in turn preceded a higher incidence of asthma. Der p 23 sensitisation peaks in late childhood and then decreases. It is preceded by early mite exposure and AD. Asthma and AR can occur in patients persistently sensitised to Der p 23 as the only mite allergen, suggesting the inclusion of molecular testing of Der p 23-sIgE for subjects with clinical suspicion of HDM allergy but without sIgE to other major D.pt. allergens.

ANALYSIS OF RISK FACTORS ATTENISTIC DERMATITIS ATTENDANCE ON THE CENTER IN PUSKESMAS PAUH PADANG

&#x0D; This study discusses the analysis of risk factors of atopic dermatitis occurrence in infants due to the high incidence rate of atopic dermatitis in infants. The purpose of this study was to determine what factors are at risk of incidence of atopic dermatitis in infants. This type of research is quantitative with case control study. The study was conducted from February to July 2017 with samples for 75 cases and control of 75 people (1: 1) so that the overall sample was 150 people. This research was conducted through interview using questionnaire. Result on Chi-Square was obtained p = 0.000 (p &lt;0.05), where there was significant relationship between genetic, allergen, environment and hygiene with occurrence of atopic dermatitis in infants. Health workers can provide counseling to underfive mothers in Puskesmas Padang Puskesmas work area to be able to pay attention to food given to toddlers and to suppress incidence of atopic dermatitis in under fives. Health workers can increase the knowledge, awareness and willingness of the community about PHBS so as to reduce the incidence rate of atopic dermatitis. Maternal care in paying attention to the food in toddlers can reduce the incidence rate of atopic dermatitis in infants.&#x0D;

Gut microbiota and atopic dermatitis in children: a scoping review

BackgroundGut microbiota plays an important role in the development of atopic dermatitis (AD). We aimed to elucidate research trends in gut microbiota and AD in children, to provide evidence and insights to the clinical prevention and treatment of AD in children.MethodsA scoping literature review on the studies of gut microbiota and AD were conducted. Two authors independently searched Pubmed et al. databases for studies focused on gut microbiota and AD in children up to January 15, 2022. The literatures were screened and analyzed by two reviewers.ResultsA total of 44 reports were finally included and analyzed. Current researches have indicated that abnormal human microecology is closely associated with AD, and the disturbance of intestinal microbiota plays an important role in the occurrence and development of AD. Probiotics can correct the microbiota disorder, have the functions of regulating immunity, antioxidant, and help to restore the microecological homeostasis. However, there is still a lack of high-quality research reports on the efficacy and safety of probiotics in the prevention and treatment of AD in children.ConclusionsThe changes of gut microbiota are essential to the development of AD in children, which may be an effective target for the prevention and treatment of AD. Future studies with larger sample size and rigorous design are needed to elucidate the effects and safety of probiotics in AD.

New Insight into Drugs to Alleviate Atopic March via Network Pharmacology-Based Analysis.

In the present study, a subject of atopic dermatitis (AD) is exposed progressively to allergic rhinitis (AR) and asthma (AS), which is defined as atopic march (AM). However, both the targets and compounds against AM are still largely unknown. Hence, we investigated the overlapping targets related directly to the occurrence and development of AD, AR, and AS through public databases (DisGeNET, and OMIM). The final overlapping targets were considered as key targets of AM, which were visualized by a Venn diagram. The protein–protein interaction (PPI) network was constructed using R package software. We retrieved the association between targets and ligands via scientific journals, and the ligands were filtered by physicochemical properties. Lastly, we performed a molecular docking test (MDT) to identify the significant ligand on each target. A total of 229 overlapping targets were considered as AM causal elements, and 210 out of them were interconnected with each other. We adopted 65 targets representing the top 30% highest in degree centrality among 210 targets. Then, we obtained 20 targets representing the top 30% greatest in betweenness centrality among 65 targets. The network analysis unveiled key targets against AM, and the MDT confirmed the affinity between significant compounds and targets. In this study, we described the significance of the eight uppermost targets (CCL2, CTLA4, CXCL8, ICAM1, IL10, IL17A, IL1B, and IL2) and eight ligands (Bindarit, CTLA-4 inhibitor, Danirixin, A-205804, AX-24 HCl, Y-320, T-5224, and Apilimod) against AM, providing a scientific basis for further experiments.

IL-32 promotes the occurrence of atopic dermatitis by activating the JAK1/microRNA-155 axis

BackgroundThis study aims to explore the mechanism of interleukin-32 (IL-32) affecting atopic dermatitis (AD) through the Janus-activated kinase-1 (JAK1)/microRNA-155 (miR-155) axis.MethodsIn this study, skin tissue samples and blood samples from normal subjects and patients with AD, human immortalized keratinocytes (HaCaT), and PA-induced mouse models of AD were selected for expression determination of IL-32, JAK1 and miR-155. The interaction among IL-32, JAK1 and miR-155 was identified with their roles in AD analyzed through loss- and gain-of-function assays.ResultsElevated IL-32 was detected in AD tissues and blood samples and promoted the occurrence of AD. IL-32 upregulated JAK1 expression and phosphorylation of its downstream genes, thus activating the JAK signaling pathway. JAK1 promoted the expression of miR-155. IL-32/JAK1/miR-155 axis promoted inflammation in the AD skin reconstruction model. In vivo experiments further confirmed that IL-32 promoted AD development by activating the JAK1/miR-155 axis.ConclusionThe present study underlined that IL-32 promoted the occurrence of AD by promoting JAK1 expression to upregulate miR-155 expression.

W162 Maternal perspectives on probiotics, intake of probiotic food and occurrence of atopic dermatitis among Filipino children

W162 Maternal perspectives on probiotics, intake of probiotic food and occurrence of atopic dermatitis among Filipino children

Increased expression of T helper 17 cells and interleukin-17 in atopic dermatitis: a systematic review and meta-analysis.

Atopic dermatitis (AD) is a chronic inflammatory skin disease with genetic susceptibility and recurrent attacks. Research examining the etiology of this disease has mainly focused on environmental factors and immunity, with immune disorders believed to be the main factor in the occurrence and development of AD. While some studies have demonstrated that increased proportion of T helper 17 (Th17) cells in the lesions of specific dermatitis mouse models, the expression of Th17 cells and interleukin (IL)-17 in patients with AD remains controversial. Related literatures were retrieved from English databases including PubMed, Embase, and Ovid-Medline. Literatures published from the establishment of the database to April 2021 were identified using the following keywords: AD, T helper cell 17 (Th17 cell), and interleukin 17 (IL-17). Review Manager5.3 software was adopted for meta-analysis. A total of 8 studies, involving 1,147 subjects, related to the pathogenesis of AD were included in this meta-analysis. The analysis revealed that the expression of Th17 cells in patients with AD was higher than that in healthy patients (P<0.00001), and the serum expression of IL-17 was also elevated in patients with AD compared to healthy participants (P=0.0001). A total of 8 publications related to the pathogenesis of AD were analyzed. The meta-analysis found that patients with AD had higher expressions of Th17 cells and IL-17 compared to healthy subjects, suggesting that AD may be related to Th17 cells and IL-17.

Association Between Prenatal Exposure to Metals and Atopic Dermatitis Among Children Aged 4 Years in Taiwan

The prevalence of atopic dermatitis has substantially increased in recent decades, and atopic dermatitis could lead to allergic airway inflammation later in life. A previous study found that inorganic arsenic exposure was associated with allergic airway inflammation in children aged 8 to 14 years. However, the association between prenatal exposure to arsenic and other metals and the risk of atopic dermatitis among young children remains unknown. To assess the association between prenatal exposure to arsenic and other metals and the occurrence of atopic dermatitis in children at age 4 years. In total, 1152 pregnant women were enrolled in the original Taiwan Maternal and Infant Cohort Study (TMICS), a multicenter birth cohort study conducted at 9 hospitals in northern, central, southern, and eastern Taiwan from October 2012 to May 2015. Of those, 586 mothers and children aged 4 years participated in follow-up questionnaire interviews from August 2016 to January 2019. After excluding 216 participants with missing data, the final statistical analysis of follow-up data included 370 mother and child pairs from the central and eastern regions of Taiwan. Data were analyzed from February 2 to August 12, 2021. Arsenic, cadmium, lead, cobalt, copper, nickel, thallium, and zinc during pregnancy. The outcome was parent-reported atopic dermatitis history among children aged 4 years. The presence of atopic dermatitis was defined as a positive response to the question, "Has your child ever had atopic dermatitis diagnosed by a physician?" During the initial TMICS study period, concentrations of arsenic, cadmium, lead, cobalt, copper, nickel, thallium, and zinc were measured in maternal urine during the third trimester of pregnancy using an inductively coupled plasma mass spectrometer. Estimated total inorganic arsenic exposure was calculated using a model that included data on both total arsenic and arsenic species (arsenite, arsenate, monomethylarsonate, and dimethylarsenate) obtained from a previous TMICS cohort. Among 370 children included in the analysis, the mean (SD) age was 3.94 (0.59) years; 208 children (56.2%) were male, and 267 children (72.2%) were from the central region of Taiwan. A total of 110 children (29.7%) had atopic dermatitis at age 4 years. Maternal estimated total inorganic arsenic exposure during pregnancy was associated with increased odds of atopic dermatitis among children at age 4 years (odds ratio [OR], 2.42 [95% CI, 1.33-4.39] for every doubled increase of total inorganic arsenic) after adjusting for parental allergies, child's sex, geographic area, maternal educational level, and exposure to tobacco smoke. Every increased unit in the weighted quantile sum index of maternal metal exposure was significantly associated with atopic dermatitis (OR, 1.63; 95% CI, 1.28-2.07). Arsenic (40.1%) and cadmium (20.5%) accounted for most of the metal mixture index. This cohort study found that prenatal exposure to inorganic arsenic and coexposure to inorganic arsenic and cadmium were associated with a higher risk of atopic dermatitis in young children. These findings suggest that prevention of exposure to inorganic arsenic and cadmium during pregnancy may be helpful for the control of atopic dermatitis and other potential allergies in children.

28163 Exposure of fine particulate matter air pollution and incident atopic dermatitis in the general population: A national population-based retrospective cohort study

Background: Atopic dermatitis(AD) is chronic recurrent inflammatory skin disease associated with various environmental factors. For decades, environmental pollutants have been known to play a major role in occur of AD. However, few population-based cohort studies has assessed the relationship between outdoor air pollutants and occurrence of AD, in short term exposure.

Atopic dermatitis in adults from sub-Saharan Africa: epidemiological and clinical patterns, severity, and quality of life

Background: Atopic dermatitis (AD) is a chronic and recurrent inflammatory dermatitis often associated with other atopic manifestations, such as asthma and allergic rhinitis. This study aimed to determine the epidemiological and clinical aspects of AD and to assess the quality of life (QoL) of patients suffering from AD in our setting. Materials and Methods: This was a cross-sectional study conducted from February through April 2017 in seven hospitals in Cameroon. The study included patients above 18 who presented themselves to a dermatology consultation, were diagnosed with AD, and gave their consent. To assess the severity of AD and evaluate the QoL of the patients, standardized scales, such as SCORAD and QoLIAD, were employed. Results: The study enrolled 46 patients between 18 and 69 years of age with a mean age of 31 ± 12 years and the prevalence of AD at 1.5%. Most of the participants were females, with a sex ratio of 0.4:1, living in urban areas (93.5%). Food (34.8%) and cosmetic products (21.7%) were found as the main risk factors in the occurrence of AD. Upon physical examination, the upper and lower limbs were found to be the most affected in 84.8% and 54.3% of cases, respectively; in addition to cutaneous xerosis (45.7%), lichenification (43.5%), and excoriations (37%). Of the 46 patients, 9 (20%) had severe AD, 32 (70%) had moderate AD, and 5 (10%) had mild AD. QoL was impaired in 43 of the 46 patients (93.5%). Conclusion: Atopic dermatitis is a pathology that impacts the QoL of adults. A QoL assessment is, therefore, an important step in the management of AD.

Combination of FLG mutations and SNPs of IL-17A and IL-19 influence on atopic dermatitis occurrence.

IntroductionAtopic dermatitis (AD) is a heterogeneous inflammatory skin disease. A fresh look on the AD pathophysiology has focused on the skin barrier defect and immune dysfunctions. IL-17A and IL-19 seem to play role in AD pathogenesis.AimThe aim was to investigate associations of SNPs of IL-17A (rs2275913) and IL-19 (rs22431188) with AD features, course and occurrence. Searching for prognostic panels composed of FLG (2282del4, R501X) mutations with IL-17A and IL-19 polymorphisms.Material and methodsBlood samples were collected from 239 patients with AD and 170 controls. Two SNPs, IL-17A and IL-19 and FLG null mutations were analyzed. PCR and RFLP restriction fragment length polymorphism analysis were used. SCORAD score to establish AD severity, VAS to estimate pruritus.ResultsNone polymorphisms of studied cytokines caused more frequent AD occurrence compared to controls. We found no associations between IL-17A and IL-19 gene polymorphisms and AD severity (respectively p = 0.954; p = 0.498), IgE level (p = 0.707; p = 0.584), VAS (p = 0.953; p = 0.478), concomitant asthma (p = 0.488, p = 0.764). The G/G genotype in IL-17A (rs2275913) occurrence with coexisting 2282del4 FLG gene mutation increased the AD frequency 9 times (p = 0.0266).ConclusionsThe SNPs of IL-17A rs2275913 and IL-19 rs22431188 SNP seem not to have influence on AD course and occurrence while studied alone. The coexistence of GG genotype of IL-17A and 2282del4 FLG mutation may play a role as prognostic AD factor.

Combination of FLG mutations and SNP of TSLP (rs1898671) influence on atopic dermatitis occurrence.

IntroductionAtopic dermatitis (AD) is a common, chronic, relapsing and heterogeneous inflammatory skin disease. Its main causes are genetic predispositions, the epidermal barrier defect, and immune system dysfunction. Thymic stromal lymphopoietin (TSLP) is highly expressed in the epidermis of AD patients and its production is triggered by exposure to environmental factors, allergens, microorganisms and irritants.AimTo search for the associations between rs1898671 polymorphism in the promotor region of the TSLP gene (SNP) and AD occurrence and course.Material and methodsThe frequency of polymorphism occurrence was examined, connection with IgE level, the severity of AD, itching, and concomitant asthma occurrence and combination with FLG gene mutations (2282del4, R501X) in the population of northern Poland. Blood samples were collected from 239 patients with AD and 170 controls. SNP of TSLP and FLG null mutations were analysed. PCR and RFLP restriction fragment length polymorphism analysis was used.ResultsNo polymorphisms of studied cytokines caused more frequent occurrence of AD compared to controls. We found no associations between TSLP gene polymorphism and AD severity (p = 0.395), IgE level (p = 0.895), VAS (p = 0.918) or concomitant asthma (p = 0.742).ConclusionsThe SNP of TSLP rs1898671 does not influence the AD course and occurrence. 2282del4 FLG mutation is a key influencer in AD. However, the coexistence of FLG mutations and SNP of TSLP may play a protective role.