Multiple roles for cytokines in atopic dermatitis: from pathogenic mediators to endotype-specific biomarkers to therapeutic targets
Open accessAbstract
Atopic dermatitis (AD) is one of the most common chronic inflammatory skin diseases, which generally presents with intense itching and recurrent eczematous lesions. AD affects up to 20% of children and 10% of adults in high-income countries. The prevalence and incidence of AD have increased in recent years. The onset of AD mostly occurs in childhood, although in some cases AD may persist in adult life or even manifest in middle age (adult-onset AD). AD pathophysiology is made of a complex net, in which genetic background, skin barrier dysfunction, innate and adaptive immune responses, as well as itch contribute to disease development, progression, and chronicization. One of the most important features of AD is skin dehydration, which is mainly caused by filaggrin mutations that determine trans-epidermal water loss, pH alterations, and antigen penetration. In accordance with the "outside-inside" theory of AD pathogenesis, in a context of an altered epidermal barrier, antigens encounter epidermal antigen presentation cells (APCs), such as epidermal Langerhans cells and inflammatory epidermal dendritic cells, leading to their maturation and Th-2 cell-mediated inflammation. APCs also bear trimeric high-affinity receptors for immunoglobulin E (IgE), which induce IgE-mediated sensitizations as part of pathogenic mechanisms leading to AD. In this review, we discuss the role of cytokines in the pathogenesis of AD, considering patients with various clinical AD phenotypes. Moreover, we describe the cytokine patterns in patients with AD at different phases of the disease evolution, as well as in relation to different phenotypes/endotypes, including age, race, and intrinsic/extrinsic subtypes. We also discuss the outcomes of current biologics for AD, which corroborate the presence of multiple cytokine axes involved in the background of AD. A deep insight into the correlation between cytokine patterns and the related clinical forms of AD is a crucial step towards increasingly personalized, and therefore more efficient therapy.
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In acute eczema, the lesions are supported by tissue expression of IL-1alpha and IL-1beta, IL-33, IL-4, IL-13, and IL-22.
“In acute eczema, the lesions are supported by tissue expression of IL-1alpha and IL-1beta, IL-33, IL-4, IL-13, and IL-22.”
From Update on the pathogenesis of atopic dermatitis. (2024) · cites this paper as [82]
Section 2.1 (Role of Cytokines in Acute AD; page unavailable) links IL-4, IL-13, and IL-22 to acute lesions and reports abundant IL-33 in lesional epidermis. It describes IL-1α release after injury and elevated IL-1β in patients with FLG mutations, but does not establish elevated tissue expression of both across acute lesions. It also says whether IL-33 causes AD or results from it is unclear, so the claim that its expression supports lesions is stronger than the source warrants. (LLM, conf=0.84)
Experimental — accuracy not yet measuredIn subacute eczema, the main cytokines are IL-4, IL-13, IL-25, IL-31, IL-33 and TLSP.
“In subacute eczema, the main cytokines are IL-4, IL-13, IL-25, IL-31, IL-33 and TLSP.”
From Update on the pathogenesis of atopic dermatitis. (2024) · cites this paper as [82]
Section 2.1 (page not provided) discusses IL-4, IL-13, IL-25, IL-33 and TSLP in acute atopic dermatitis; Section 2.2 discusses IL-31 in chronic atopic dermatitis. The paper does not identify this list as the main cytokines of subacute eczema. The claim also appears to transpose TSLP as “TLSP.” (LLM, conf=0.88)
Experimental — accuracy not yet measuredIn chronic eczema, there is a predominance of Th1 and Th17 cytokines: IFNγ, TNFα, IL-17A, IL-17F.
“In chronic eczema, there is a predominance of Th1 and Th17 cytokines: IFNγ, TNFα, IL-17A, IL-17F.82”
From Update on the pathogenesis of atopic dermatitis. (2024) · cites this paper as [82]
Section 2.2 (page not specified) links chronic atopic dermatitis to intensified Th1 and Th17 responses, accumulation of IL-17A and IL-17F, and activity of IFN-γ and TNF-α. It does not say Th1 and Th17 predominate: it says Th2 responses also intensify during progression to chronic disease. (LLM, conf=0.88)
Experimental — accuracy not yet measured
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Sorted by citations
Update on the pathogenesis of atopic dermatitis.
Criado, P. R., Miot, H. A., Bueno-Filho, R., Ianhez, M., Criado, R. F. J., & de Castro, C. C. S. (2024) · Anais brasileiros de dermatologia · doi:10.1016/j.abd.2024.06.001 · Cited by 66 · see citing works
- Authors
- Fania, L., Moretta, G., Antonelli, F., Scala, E., Abeni, D., Albanesi, C., & Madonna, S.
- Affiliations
- Istituto Dermopatico dell'Immacolata (IT)
- Corresponding author
- Albanesi, Cristina
- ORCID
- Venue
- International Journal of Molecular Sciences
- Publisher
- MDPI AG
- Published
- 2022-02-28
- Volume
- 23
- Issue
- 5
- Pages
- 2684
- ISSN
- 1422-0067 (ISSN-L)
- PMC
- PMC8910412
- OpenAlex
- W4214638324
- Cited by
- 128
- References
- 11
- Citations by year
- 2026: 28 · 2025: 42 · 2024: 36 · 2023: 14 · 2022: 8
- FWCI
- 4.45
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- International Journal of Molecular Sciences (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Ministero della Salute
- Topics
- Health Sciences › Medicine › Dermatology › Dermatology and Skin Diseases
- Health Sciences › Medicine › Dermatology › Contact Dermatitis and Allergies
- Health Sciences › Medicine › Physiology › Asthma and respiratory diseases
- Keywords
- atopic dermatitis, cytokines, disease endotypes, biomarkers, adult-onset atopic dermatitis, filaggrin mutations, skin barrier dysfunction, type 2 inflammation, Langerhans cells, dendritic cells, IgE sensitization, biologic therapy, personalized treatment, pruritus
- MeSH terms
- Dermatitis, Atopic, Humans, Immunoglobulin E, Pruritus, Skin Diseases, Biomarkers, Cytokines
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