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Wasserer, S.* ; Jargosch, M. ; Mayer, K.E.* ; Eigemann, J. ; Raunegger, T.* ; Aydin, G.* ; Eyerich, S. ; Biedermann, T.* ; Eyerich, K.*

Characterization of high and low IFNG-expressing subgroups in atopic dermatitis.

Int. J. Mol. Sci. 25:6158 (2024)
Verlagsversion DOI PMC
Open Access Gold
Creative Commons Lizenzvertrag
Atopic dermatitis (AD) is one of the most common chronic inflammatory skin diseases, with an increasing number of targeted therapies available. While biologics to treat AD exclusively target the key cytokines of type 2 immunity, Janus kinase inhibitors target a broad variety of cytokines, including IFN-γ. To better stratify patients for optimal treatment outcomes, the identification and characterization of subgroups, especially with regard to their IFNG expression, is of great relevance, as the role of IFNG in AD has not yet been fully clarified. This study aims to define AD subgroups based on their lesional IFNG expression and to characterize them based on their gene expression, T cell secretome and clinical attributes. RNA from the lesional and non-lesional biopsies of 48 AD patients was analyzed by RNA sequencing. Based on IFNG gene expression and the release of IFN-γ by lesional T cells, this cohort was categorized into three IFNG groups (high, medium, and low) using unsupervised clustering. The low IFNG group showed features of extrinsic AD with a higher prevalence of atopic comorbidities and impaired epidermal lipid synthesis. In contrast, patients in the high IFNG group had a higher average age and an activation of additional pro-inflammatory pathways. On the cellular level, higher amounts of M1 macrophages and natural killer cell signaling were detected in the high IFNG group compared to the low IFNG group by a deconvolution algorithm. However, both groups shared a common dupilumab response gene signature, indicating that type 2 immunity is the dominant immune shift in both subgroups. In summary, high and low IFNG subgroups correspond to intrinsic and extrinsic AD classifications and might be considered in the future for evaluating therapeutic efficacy or non-responders.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Ifn-γ ; Ifng ; Il-4ra1 ; M1 Macrophages ; Atopic Dermatitis ; Natural Killer Cells ; Subgroups/endotypes; Recombinant Interferon-gamma; Skin; Therapy; Interleukin-4; Apoptosis; Cytokines; Subsets; Immune; Il-4
ISSN (print) / ISBN 1422-0067
e-ISSN 1661-6596
Zeitschrift International Journal of Molecular Sciences
Quellenangaben Band: 25, Heft: 11, Seiten: , Artikelnummer: 6158 Supplement: ,
Verlag MDPI
Verlagsort Basel
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute for Allergy Research (IAF)
Förderungen
European Research Council
Technical University of Munich
Deutsche Forschungsgemeinschaft