scholarly journals Nutritional Factors in the Prevention of Atopic Dermatitis in Children

2021 ◽  
Vol 8 ◽  
Author(s):  
Thulja Trikamjee ◽  
Pasquale Comberiati ◽  
Enza D'Auria ◽  
Diego Peroni ◽  
Gian Vincenzo Zuccotti
Keyword(s):  
Atopic Dermatitis ◽  
Life Stress ◽  
Skin Diseases ◽  
Maternal Diet ◽  
Skin Inflammation ◽  
Future Research ◽  
Skin Barrier Function ◽  
Nutritional Factors ◽  
Nutrition And Diet

Atopic dermatitis is one of the most frequent chronic skin diseases worldwide and often develops within the first few years of life. Recent advancements in our knowledge of its pathophysiology have brought to light the role of genetic predisposition and environmental triggers. With the increasing prevalence of allergic diseases, there is a strong need for a better understanding of the various modifiable eliciting factors of such conditions. The concomitant rise in food allergy and insights into the skin barrier function has highlighted the role of nutrition and diet in the prevention and modification of allergic disorders. Furthermore, the identification of the skin as an important route of sensitization, and the risk of progression to asthma later in life, stress the significance of optimizing our management of skin inflammation in the prevention of allergies. Many nutritional factors, including the type of maternal diet during pregnancy, the duration of breastfeeding, the epicutaneous exposure of allergenic food proteins in the first few years of life, the timing of the introduction of complementary foods, the supplementation of vitamins and probiotics/prebiotics during prenatal and early life, have been assessed as potential targets for the prevention of atopy and eczema. Here, we review the latest data addressing prenatal and perinatal nutritional and dietary interventions in the primary prevention of atopic dermatitis. Also, we define knowledge gaps and targets for future research in the prevention of atopic dermatitis.

scholarly journals Role of AHR Ligands in Skin Homeostasis and Cutaneous Inflammation

Cells ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 3176
Author(s):  
Nieves Fernández-Gallego ◽  
Francisco Sánchez-Madrid ◽  
Danay Cibrian
Keyword(s):  
Atopic Dermatitis ◽  
Barrier Function ◽  
Inflammatory Responses ◽  
Normal Skin ◽  
Skin Barrier ◽  
Skin Inflammation ◽  
In Vitro Assays ◽  
Skin Barrier Function

Aryl hydrocarbon receptor (AHR) is an important regulator of skin barrier function. It also controls immune-mediated skin responses. The AHR modulates various physiological functions by acting as a sensor that mediates environment–cell interactions, particularly during immune and inflammatory responses. Diverse experimental systems have been used to assess the AHR’s role in skin inflammation, including in vitro assays of keratinocyte stimulation and murine models of psoriasis and atopic dermatitis. Similar approaches have addressed the role of AHR ligands, e.g., TCDD, FICZ, and microbiota-derived metabolites, in skin homeostasis and pathology. Tapinarof is a novel AHR-modulating agent that inhibits skin inflammation and enhances skin barrier function. The topical application of tapinarof is being evaluated in clinical trials to treat psoriasis and atopic dermatitis. In the present review, we summarize the effects of natural and synthetic AHR ligands in keratinocytes and inflammatory cells, and their relevance in normal skin homeostasis and cutaneous inflammatory diseases.

scholarly journals The Implications of Pruritogens in the Pathogenesis of Atopic Dermatitis

2021 ◽  
Vol 22 (13) ◽  
pp. 7227
Author(s):  
Lai-San Wong ◽  
Yu-Ta Yen ◽  
Chih-Hung Lee
Keyword(s):  
Atopic Dermatitis ◽  
Environmental Factors ◽  
Immune Responses ◽  
Immune Cells ◽  
Inflammatory Disease ◽  
Targeted Therapies ◽  
Skin Barrier ◽  
Skin Barrier Function ◽  
Inflammatory Molecules

Atopic dermatitis (AD) is a prototypic inflammatory disease that presents with intense itching. The pathophysiology of AD is multifactorial, involving environmental factors, genetic susceptibility, skin barrier function, and immune responses. A recent understanding of pruritus transmission provides more information about the role of pruritogens in the pathogenesis of AD. There is evidence that pruritogens are not only responsible for eliciting pruritus, but also interact with immune cells and act as inflammatory mediators, which exacerbate the severity of AD. In this review, we discuss the interaction between pruritogens and inflammatory molecules and summarize the targeted therapies for AD.

scholarly journals Leptin System in Obese Dog Skin: A Pilot Study

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2338
Author(s):  
Margherita Maranesi ◽  
Antonio Di Loria ◽  
Cecilia Dall’Aglio ◽  
Diego Piantedosi ◽  
Elvio Lepri ◽  
...  
Keyword(s):  
Immune System ◽  
Skin Diseases ◽  
Skin Inflammation ◽  
Normal Weight ◽  
Hair Follicles ◽  
Obese Group ◽  
System Control ◽  
System Composition ◽  
Skin Biology

Obesity predisposes to several health problems including skin diseases. However, information on the relationship between obesity and skin disorders in pets is very scarce. Leptin (LEP) is mainly produced by adipose tissue and has a prominent role in skin biology. This study evaluated the LEP system in the skin of obese dogs compared to normal-weight animals. The investigation was carried out on 10 obese (Obese group) and 10 normal-weight (Normal-weight group) dogs through Real-time PCR and immunohistochemistry. Cells of skin associated immune system were also evaluated. No differences were evidenced between the two groups as well as skin inflammation. LEP differences were no significant, while LEPR transcript appeared 10-fold higher in obesedogs than in normal-weight ones. Immunostaining for both molecules was observed in several skin structures such as the epidermis, hair follicles, and glands. No differences appeared in the skin associated immune system composition. This study is a preliminary report showing that LEP system changes in obese dog skin. The increased LEPR expression observed in the obese group suggests that the receptor plays a modulating role in the system control. However, the exact role of LEPin the skin under obesity conditions needs further elucidation.

scholarly journals 676 Minimum role of filaggrin-gene mutations in the skin barrier function of atopic dermatitis

2018 ◽  
Vol 138 (5) ◽  
pp. S115
Author(s):  
M. Ota ◽  
T. Sasaki ◽  
T. Ebihara ◽  
S. Murata ◽  
S. Kaneko ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Barrier Function ◽  
Gene Mutations ◽  
Skin Barrier ◽  
Skin Barrier Function

scholarly journals ROLE OF ARKA TAILA AND BAAKUCHIKADYAM CHURNA ON VICHARCHIKA: A RANDOMIZED CONTROL TRIAL

2021 ◽  
pp. 1-7
Author(s):  
Sheetal Yadav ◽  
Anita Sharma ◽  
Dinesh C. Chouhan
Keyword(s):  
Atopic Dermatitis ◽  
Skin Diseases ◽  
Living Condition ◽  
Chemical Additives ◽  
External Application ◽  
Number Of Patients ◽  
Group A ◽  
Repeated Use ◽  
Group B

In the present era skin diseases like atopic dermatitis/eczema get a suitable atmosphere especially in developing countries like India, due to unhygienic living condition, Disturbed life style, Polluted environment and repeated use of chemical additives. This type of diseases make a person feels much more humiliation in society because no one wants to touch them, forbidden by everyone, in that conditions person leads to lack of confidence and feels underestimated mentally as well as physically. Due to this life disturbing condition this disease was chosen for the study. The study was conducted in 30 clinically diagnosed patients of Vicharchika (Atopic Dermatitis) and randomly divided in to two groups, namely group A and group B. Each group has 15 number of patients. Group A is treated with Arka Taila (external application) used twice in a day for 45 days along with Baakuchikadyam Churna for internal consumption (3-6 grams). Group B is treated with Cutis Capsule (2 Capsules) twice a day orally along with external application of Cutis Cream as required for 45 days.

scholarly journals THE ROLE OF PPAR IN THE PATHOGENESIS OF PSORIASIS AND OBESITY

2019 ◽  
Vol 19 (2) ◽  
pp. 224-229
Author(s):  
Ya. Yemchenko
Keyword(s):  
Skin Diseases ◽  
Social Activity ◽  
Future Research ◽  
Social Significance ◽  
Inflammatory Reactions ◽  
Multifactorial Diseases ◽  
The Social ◽  
Excessive Body Weight ◽  
Depth Study

Psoriasis is one of the most common chronic recurrent multifactorial diseases of the skin with a predominance of genetic predisposition. The disease is characterized by hyperproliferation of epidermal cells, impairment of the keratinisation against the background of inflammatory reactions in the dermal layer, the nails, joints and scalp involvement. According to the results of clinical and epidemiological research, about 3-4% of the population of our planet has psoriasis, regardless of sex, age and ethnic group, while the share of this pathology in the overall structure of skin diseases reaches from 1% - to 40%, according to some reports. However, despite the wide prevalence of psoriasis and a huge number of works on this issue, there is still no shared view on the pathogenesis of this dermatosis. The data presented by many clinical studies show that there has been a recent increase in cases of comorbidity of psoriasis and obesity, leading to severe, atypical, disabling and resistant to the treatment forms of dermatosis. All this considerably impairs the quality of life of patients with psoriasis, reduces their working capacity and social activity that lays emphasis on not only the medical but also the social significance of the problem. Immunological disorders and genetic defects have been proven as the causes of psoriasis and abdominal obesity. The distinctive feature of the pathogenesis in the patients having comorbidity of psoriasis and obesity, in contrast to the patients without excessive body weight, is a statistically significant increase in hyperleptinomia and in systemic cytokine proinflammatory potential. Therefore, the vision for the future research is in-depth study of the pathogenesis of comorbid disease in patients with psoriasis that will contribute to reveal new targets for the treatment of this dermatosis.

scholarly journals The Role of Toll-Like Receptors in Skin Host Defense, Psoriasis, and Atopic Dermatitis

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Lixiang Sun ◽  
Wenjie Liu ◽  
Ling-juan Zhang
Keyword(s):  
Atopic Dermatitis ◽  
Human Body ◽  
Lupus Erythematosus ◽  
Mammalian Cells ◽  
Skin Diseases ◽  
Inflammatory Responses ◽  
Innate Immune ◽  
Host Responses ◽  
Molecular Patterns

As the key defense molecules originally identified in Drosophila, Toll-like receptor (TLR) superfamily members play a fundamental role in detecting invading pathogens or damage and initiating the innate immune system of mammalian cells. The skin, the largest organ of the human body, protects the human body by providing a critical physical and immunological active multilayered barrier against invading pathogens and environmental factors. At the first line of defense, the skin is constantly exposed to pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs), and TLRs, expressed in a cell type-specific manner by various skin cells, serve as key molecules to recognize PAMPs and DAMPs and to initiate downstream innate immune host responses. While TLR-initiated inflammatory responses are necessary for pathogen clearance and tissue repair, aberrant activation of TLRs will exaggerate T cell-mediated autoimmune activation, leading to unwanted inflammation, and the development of several skin diseases, including psoriasis, atopic dermatitis, systemic lupus erythematosus, diabetic foot ulcers, fibrotic skin diseases, and skin cancers. Together, TLRs are at the interface between innate immunity and adaptive immunity. In this review, we will describe current understanding of the role of TLRs in skin defense and in the pathogenesis of psoriasis and atopic dermatitis, and we will also discuss the development and therapeutic effect of TLR-targeted therapies.

scholarly journals JNK1 Signaling Downstream of the EGFR Pathway Contributes to Aldara®-Induced Skin Inflammation

2021 ◽  
Vol 11 ◽  
Author(s):  
Aurore Le ◽  
Abdulkader Azouz ◽  
Séverine Thomas ◽  
Nicolas Istaces ◽  
Muriel Nguyen ◽  
...  
Keyword(s):  
Inflammatory Markers ◽  
Skin Diseases ◽  
Myeloid Cells ◽  
Skin Inflammation ◽  
Inflammasome Activation ◽  
Inflammatory Skin Diseases ◽  
Egfr Signaling Pathway ◽  
Egfr Ligands

c-Jun N-terminal protein kinase 1 (JNK1) is involved in multiple biological processes but its implication in inflammatory skin diseases is still poorly defined. Herein, we studied the role of JNK1 in the context of Aldara®-induced skin inflammation. We observed that constitutive ablation of JNK1 reduced Aldara®-induced acanthosis and expression of inflammatory markers. Conditional deletion of JNK1 in myeloid cells led to reduced skin inflammation, a finding that was associated with impaired Aldara®-induced inflammasome activation in vitro. Next, we evaluated the specific role of JNK1 in epidermal cells. We observed reduced Aldara®-induced acanthosis despite similar levels of inflammatory markers. Transcriptomic and epigenomic analysis of keratinocytes revealed the potential involvement of JNK1 in the EGFR signaling pathway. Finally, we show that inhibition of the EGFR pathway reduced Aldara®-induced acanthosis. Taken together, these data indicate that JNK1 plays a dual role in the context of psoriasis by regulating the production of inflammatory cytokines by myeloid cells and the sensitivity of keratinocytes to EGFR ligands. These results suggest that JNK1 could represent a valuable therapeutic target in the context of psoriasis.

scholarly journals The Role of the Environmental Risk Factors in the Pathogenesis and Clinical Outcome of Atopic Dermatitis

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Domenico Bonamonte ◽  
Angela Filoni ◽  
Michelangelo Vestita ◽  
Paolo Romita ◽  
Caterina Foti ◽  
...  
Keyword(s):  
Risk Factors ◽  
Developing Countries ◽  
Atopic Dermatitis ◽  
Disease Onset ◽  
Skin Barrier ◽  
Paediatric Population ◽  
Skin Barrier Function ◽  
Bacterial Endotoxins ◽  
Immunologic Factors

Atopic dermatitis (AD) prevalence is rising worldwide. Literature data suggest the incidence of AD in developing countries is gradually getting close to that of developed ones, in which AD affects 20% of the paediatric population. Such an increment, associated with significant variations in prevalence among the various countries, underlines the importance of environmental factors in the disease onset. Among these, great importance is given to hygiene, intestinal microbiota, exposure to bacterial endotoxins, outdoor living with contact to animals, atmospheric pollution, weather, and diet. Genetic (alteration of the skin barrier function) as well as immunologic factors concur with the environmental ones. Only the systematical study of all these elements can best elucidate AD epidemiology.

scholarly journals Regulation of Skin Barrier Function via Competition between AHR Axis versus IL-13/IL-4‒JAK‒STAT6/STAT3 Axis: Pathogenic and Therapeutic Implications in Atopic Dermatitis

2020 ◽  
Vol 9 (11) ◽  
pp. 3741
Author(s):  
Masutaka Furue
Keyword(s):  
Atopic Dermatitis ◽  
Barrier Function ◽  
Coal Tar ◽  
Calcineurin Inhibitors ◽  
Skin Barrier ◽  
Skin Inflammation ◽  
Interleukin 4 ◽  
Skin Barrier Function ◽  
Barrier Dysfunction ◽  
Therapeutic Implications

Atopic dermatitis (AD) is characterized by skin inflammation, barrier dysfunction, and chronic pruritus. As the anti-interleukin-4 (IL-4) receptor α antibody dupilumab improves all three cardinal features of AD, the type 2 cytokines IL-4 and especially IL-13 have been indicated to have pathogenic significance in AD. Accumulating evidence has shown that the skin barrier function is regulated via competition between the aryl hydrocarbon receptor (AHR) axis (up-regulation of barrier) and the IL-13/IL-4‒JAK‒STAT6/STAT3 axis (down-regulation of barrier). This latter axis also induces oxidative stress, which exacerbates inflammation. Conventional and recently developed agents for treating AD such as steroid, calcineurin inhibitors, cyclosporine, dupilumab, and JAK inhibitors inhibit the IL-13/IL-4‒JAK‒STAT6/STAT3 axis, while older remedies such as coal tar and glyteer are antioxidative AHR agonists. In this article, I summarize the pathogenic and therapeutic implications of the IL-13/IL-4‒JAK‒STAT6/STAT3 axis and the AHR axis in AD.

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