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  1. Article ; Online: Are blood cytokines reliable biomarkers of allergic disease diagnosis and treatment responses?

    Radonjic-Hoesli, Susanne / Pavlov, Nikolay / Simon, Hans-Uwe / Simon, Dagmar

    The Journal of allergy and clinical immunology

    2022  Volume 150, Issue 2, Page(s) 251–258

    Abstract: With the development of targeted therapies for allergic diseases, the need for biomarkers supporting disease diagnosis and management has increased. Recent research has elucidated the pattern of cytokines and their distinct roles in the pathogenesis of ... ...

    Abstract With the development of targeted therapies for allergic diseases, the need for biomarkers supporting disease diagnosis and management has increased. Recent research has elucidated the pattern of cytokines and their distinct roles in the pathogenesis of allergic diseases. This means that cytokines should be considered as biomarkers. In this review article, we summarize published findings and critically discuss the use of cytokine measurements in association with disease diagnosis and management. Among the variety of suggested cytokines, thymus and activation-regulated chemokine (TARC) stands out and can indeed serve as a biomarker of atopic dermatitis. Both biologic characteristics and technical issues determine the reliability and limit the use of blood cytokines as biomarkers.
    MeSH term(s) Biomarkers ; Chemokine CCL17 ; Cytokines ; Humans ; Reproducibility of Results ; Severity of Illness Index
    Chemical Substances Biomarkers ; Chemokine CCL17 ; Cytokines
    Language English
    Publishing date 2022-08-19
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 121011-7
    ISSN 1097-6825 ; 1085-8725 ; 0091-6749
    ISSN (online) 1097-6825 ; 1085-8725
    ISSN 0091-6749
    DOI 10.1016/j.jaci.2022.06.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Eosinophils in skin diseases.

    Radonjic-Hoesli, Susanne / Brüggen, Marie-Charlotte / Feldmeyer, Laurence / Simon, Hans-Uwe / Simon, Dagmar

    Seminars in immunopathology

    2021  Volume 43, Issue 3, Page(s) 393–409

    Abstract: Eosinophil infiltration is a common finding in a broad spectrum of skin diseases, despite the fact that the skin is devoid of eosinophils under physiologic conditions. Although cutaneous eosinophilia is reactive, cytokine-mediated in most cases, diseases ...

    Abstract Eosinophil infiltration is a common finding in a broad spectrum of skin diseases, despite the fact that the skin is devoid of eosinophils under physiologic conditions. Although cutaneous eosinophilia is reactive, cytokine-mediated in most cases, diseases with an intrinsic mutation-mediated clonal expansion of eosinophils can also manifest on the skin. As eosinophils are involved in host defense, regulate immune responses, generate pruritus, induce remodeling and fibrosis, and can cause tissue damage, they have the capacity to actively contribute to the pathogenesis of diseases. Recent research provided deeper insights in the mechanisms, e.g., bacterial and viral clearance, blister formation, recruitment of cytotoxic T cells, and generation of pruritus, by which eosinophils might come into action. This review aims at providing an overview on the clinical presentations of eosinophil-associated dermatoses and the current understanding of their pathogenic role in these diseases. Further, we discuss the effects of therapies targeting eosinophils.
    MeSH term(s) Cytokines ; Eosinophilia/etiology ; Eosinophils ; Humans ; Skin ; Skin Diseases/etiology
    Chemical Substances Cytokines
    Language English
    Publishing date 2021-06-07
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2316828-6
    ISSN 1863-2300 ; 1863-2297
    ISSN (online) 1863-2300
    ISSN 1863-2297
    DOI 10.1007/s00281-021-00868-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Characteristics of Dermatological Patients With Blood Eosinophilia: A Retrospective Analysis of 453 Patients.

    Radonjic-Hoesli, Susanne / Martignoni, Zora / Cazzaniga, Simone / Furrer, Dominique Isabel / Simon, Hans-Uwe / Bürgler, Christina / Simon, Dagmar

    The journal of allergy and clinical immunology. In practice

    2022  Volume 10, Issue 5, Page(s) 1229–1237.e8

    Abstract: Background: Skin diseases associated with blood or tissue eosinophilia are common. Because these have various clinical manifestations, making the correct diagnosis can be challenging. So far, dermatological patients with concomitant blood eosinophilia ... ...

    Abstract Background: Skin diseases associated with blood or tissue eosinophilia are common. Because these have various clinical manifestations, making the correct diagnosis can be challenging. So far, dermatological patients with concomitant blood eosinophilia have not been characterized.
    Objective: To investigate patterns of dermatological patients with concomitant blood eosinophilia to obtain information helpful for optimizing disease management.
    Methods: In this retrospective study, demographic and clinical data and diagnostic test results of all patients presenting with dermatoses associated with blood eosinophilia referred to a university center from 2014 to 2018 were extracted from the electronic patient charts and evaluated using descriptive and semantic map analyses.
    Results: A total of 453 patients (51.4% females; mean age, 58.4 ± 21.7 years) were included and grouped according to blood absolute eosinophil counts: severe, greater than or equal to 1.5 G/L (n = 87; 19.2%); moderate, 1.0 to 1.49 G/L (n = 73; 16.1%); and mild eosinophilia, 0.5 to 0.99 G/L (n = 293; 64.7%). Most patients presented with chronic (64.6%), generalized skin lesions (75.9%), and pruritus (88.1%). Statistical analyses revealed 3 distinct patterns: (1) mild eosinophilia associated with localized skin disease, age less than 50 years, history of atopy, and diagnosis of eczema or infectious disease; (2) moderate eosinophilia linked to generalized skin lesions, pruritus, age more than 70 years, and autoimmune bullous disease; and (3) severe eosinophilia associated with diagnosis of hypereosinophilic syndromes, drug hypersensitivity, or malignant disease.
    Conclusions: Based on the pattern analysis of patients with dermatoses associated with blood eosinophilia, a diagnostic workup has been developed aiming at setting the correct differential diagnosis in a feasible and effective manner.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Eosinophils/pathology ; Female ; Humans ; Hypereosinophilic Syndrome ; Male ; Middle Aged ; Pruritus/etiology ; Retrospective Studies ; Skin Diseases
    Language English
    Publishing date 2022-03-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2843237-X
    ISSN 2213-2201 ; 2213-2198
    ISSN (online) 2213-2201
    ISSN 2213-2198
    DOI 10.1016/j.jaip.2022.02.018
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Dupilumab-associated ocular surface disease is characterized by a shift from Th2/Th17 toward Th1/Th17 inflammation.

    Thormann, Kathrin / Lüthi, Anne-Sophie / Deniau, Felix / Heider, Anja / Cazzaniga, Simone / Radonjic-Hoesli, Susanne / Lehmann, Mathias / Schlapbach, Christoph / Herzog, Elio L / Kreuzer, Marco / Zinkernagel, Martin S / Akdis, Cezmi A / Zysset-Burri, Denise C / Simon, Hans-Uwe / Simon, Dagmar

    Allergy

    2024  Volume 79, Issue 4, Page(s) 937–948

    Abstract: Background: Dupilumab is used for the treatment of atopic dermatitis (AD). Approximately one third of AD patients develop a dupilumab-associated ocular surface disease (DAOSD), of which the pathomechanism is poorly understood. This study aimed at ... ...

    Abstract Background: Dupilumab is used for the treatment of atopic dermatitis (AD). Approximately one third of AD patients develop a dupilumab-associated ocular surface disease (DAOSD), of which the pathomechanism is poorly understood. This study aimed at investigating inflammatory markers in tear fluids of patients on dupilumab therapy.
    Methods: Tear fluids were collected from AD patients with DAOSD (ADwDAOSD), AD patients without DAOSD (ADw/oDAOSD), and non-AD patients before and during dupilumab therapy, and analyzed using a specialized proteomic approach quantifying inflammatory markers. The ocular surface microbiome was determined by next generation sequencing technology.
    Results: Upon dupilumab therapy, an upregulation of 31 inflammatory markers was observed in DAOSD tear fluids compared to baseline in AD patients. While IL-12B was upregulated in both ADwDAOSD and ADw/oDAOSD groups, the pattern of inflammatory markers significantly differed between groups and over time. In the ADwDAOSD group, a shift from a mixed Th2/Th17 pattern at baseline toward a Th1/Th17 profile under dupilumab was observed. Furthermore, an upregulation of remodeling and fibrosis markers was seen in DAOSD. Semantic map and hierarchical cluster analyses of baseline marker expression revealed four clusters distinguishing between AD and non-AD as well as ADwDAOSD and ADw/oDAOSD patient groups. In a pilot study, dupilumab therapy was associated with a decrease in richness of the ocular surface microbiome.
    Conclusions: DAOSD is characterized by a Th1/Th17 cytokine profile and an upregulation of markers known to promote remodeling and fibrosis. The expression pattern of inflammatory markers in tear fluids at baseline might serve as a prognostic factor for DAOSD.
    MeSH term(s) Humans ; Pilot Projects ; Proteomics ; Dermatitis, Atopic/diagnosis ; Dermatitis, Atopic/drug therapy ; Dermatitis, Atopic/metabolism ; Inflammation ; Eye Diseases ; Fibrosis ; Severity of Illness Index ; Treatment Outcome ; Antibodies, Monoclonal, Humanized
    Chemical Substances dupilumab (420K487FSG) ; Antibodies, Monoclonal, Humanized
    Language English
    Publishing date 2024-02-05
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 391933-x
    ISSN 1398-9995 ; 0105-4538
    ISSN (online) 1398-9995
    ISSN 0105-4538
    DOI 10.1111/all.16045
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Successful treatment of refractory folliculitis decalvans with apremilast.

    Fässler, Mirjam / Radonjic-Hoesli, Susanne / Feldmeyer, Laurence / Imstepf, Valentina / Pelloni, Lorenzo / Yawalkar, Nikhil / de Viragh, Pierre A

    JAAD case reports

    2020  Volume 6, Issue 10, Page(s) 1079–1081

    Language English
    Publishing date 2020-08-20
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2834220-3
    ISSN 2352-5126
    ISSN 2352-5126
    DOI 10.1016/j.jdcr.2020.08.019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: PPAR-γ regulates the effector function of human T helper 9 cells by promoting glycolysis.

    Bertschi, Nicole L / Steck, Oliver / Luther, Fabian / Bazzini, Cecilia / von Meyenn, Leonhard / Schärli, Stefanie / Vallone, Angela / Felser, Andrea / Keller, Irene / Friedli, Olivier / Freigang, Stefan / Begré, Nadja / Radonjic-Hoesli, Susanne / Lamos, Cristina / Gabutti, Max Philip / Benzaquen, Michael / Laimer, Markus / Simon, Dagmar / Nuoffer, Jean-Marc /
    Schlapbach, Christoph

    Nature communications

    2023  Volume 14, Issue 1, Page(s) 2471

    Abstract: T helper 9 ( ... ...

    Abstract T helper 9 (T
    MeSH term(s) Humans ; Glucose/metabolism ; Glycolysis ; Inflammation/pathology ; Interleukin-13/metabolism ; Interleukin-9 ; PPAR gamma/genetics ; PPAR gamma/metabolism ; T-Lymphocytes, Helper-Inducer
    Chemical Substances Glucose (IY9XDZ35W2) ; Interleukin-13 ; Interleukin-9 ; PPAR gamma ; PPARG protein, human
    Language English
    Publishing date 2023-04-29
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-38233-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Eosinophils.

    Radonjic-Hösli, Susanne / Simon, Hans-Uwe

    Chemical immunology and allergy

    2014  Volume 100, Page(s) 193–204

    Abstract: In 1846, T. Wharton-Jones described a coarsely granular stage in the development of granulocytic cells in animal and human blood. Shortly thereafter, Max Schultze redefined the coarsely granular cells as a type distinct from finely granular cells, rather ...

    Abstract In 1846, T. Wharton-Jones described a coarsely granular stage in the development of granulocytic cells in animal and human blood. Shortly thereafter, Max Schultze redefined the coarsely granular cells as a type distinct from finely granular cells, rather than just a developmental stage. It was, however, not until 1879, when Paul Ehrlich introduced a method to distinguish granular cells by the staining properties of their granules, that a classification became possible. An intensive staining for eosin, among other aniline dyes, was eponymous for the coarsely granular cell type, which thereupon became referred to as eosinophil granulocyte. Eosinophilia had already been described in many diseases by the late 19th century. The role of these cells, however, today remains a matter of continuing speculation and investigation. Many functions have been attributed to the eosinophil over the years, often linked to increasing knowledge about the granular and cytoplasmatic contents. A better understanding of the regulatory mechanisms of eosinopoiesis has led to the development of knock-out mice strains as well as therapeutic strategies for reducing the eosinophil load in patients. The effect of these therapeutics and the characterization of the knock-out phenotypes have led to a great increase in the knowledge of the role of the eosinophil in disease. Today we think of the eosinophil as a multifunctional cell involved in host defense, tissue damage and remodeling, as well as immunomodulation.
    MeSH term(s) Animals ; Cytokines/metabolism ; Eosinophil Granule Proteins/metabolism ; Eosinophilia/metabolism ; Eosinophilia/pathology ; Eosinophilia/therapy ; Eosinophils/immunology ; Eosinophils/metabolism ; Eosinophils/pathology ; Glucocorticoids/therapeutic use ; Humans ; Mice ; Receptors, Cytokine/metabolism ; Transcription Factors/metabolism ; Transforming Growth Factor beta/metabolism
    Chemical Substances Cytokines ; Eosinophil Granule Proteins ; Glucocorticoids ; Receptors, Cytokine ; Transcription Factors ; Transforming Growth Factor beta
    Language English
    Publishing date 2014
    Publishing country Switzerland
    Document type Journal Article
    ISSN 1662-2898 ; 1660-2242
    ISSN (online) 1662-2898
    ISSN 1660-2242
    DOI 10.1159/000358735
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Trajectories of humoral and cellular immunity and responses to a third dose of mRNA vaccines against SARS-CoV-2 in patients with a history of anti-CD20 therapy.

    Sidler, Daniel / Born, Alexander / Schietzel, Simeon / Horn, Michael P / Aeberli, Daniel / Amsler, Jennifer / Möller, Burkhard / Njue, Linet M / Medri, Cesare / Angelillo-Scherrer, Anne / Borradori, Luca / Seyed Jafari, S Morteza / Radonjic-Hoesli, Susanne / Chan, Andrew / Hoepner, Robert / Bacher, Ulrike / Mani, Laila-Yasmin / Iype, Joseena Mariam / Suter-Riniker, Franziska /
    Staehelin, Cornelia / Nagler, Michael / Hirzel, Cedric / Maurer, Britta / Moor, Matthias B

    RMD open

    2022  Volume 8, Issue 1

    Abstract: Background: The majority of patients with B-cell-depleting therapies show compromised vaccination-induced immune responses. Herein, we report on the trajectories of anti-SARS-CoV-2 immune responses in patients of the RituxiVac study compared with ... ...

    Abstract Background: The majority of patients with B-cell-depleting therapies show compromised vaccination-induced immune responses. Herein, we report on the trajectories of anti-SARS-CoV-2 immune responses in patients of the RituxiVac study compared with healthy volunteers and investigate the immunogenicity of a third vaccination in previously humoral non-responding patients.
    Methods: We investigated the humoral and cell-mediated immune response after SARS-CoV-2 messanger RNA vaccination in patients with a history with anti-CD20 therapies. Coprimary outcomes were antispike and SARS-CoV-2-stimulated interferon-γ concentrations in vaccine responders 4.3 months (median; IQR: 3.6-4.8 months) after first evaluation, and humoral and cell-mediated immunity (CMI) after a third vaccine dose in previous humoral non-responders. Immunity decay rates were compared using analysis of covariance in linear regression.
    Results: 5.6 months (IQR: 5.1-6.7) after the second vaccination, we detected antispike IgG in 88% (29/33) and CMI in 44% (14/32) of patients with a humoral response after two-dose vaccination compared with 92% (24/26) healthy volunteers with antispike IgG and 69% (11/16) with CMI 6.8 months after the second vaccination (IQR: 6.0-7.1). Decay rates of antibody concentrations were comparable between patients and controls (p=0.70). In two-dose non-responders, a third SARS-CoV-2 vaccine elicited humoral responses in 19% (6/32) and CMI in 32% (10/31) participants.
    Conclusion: This study reveals comparable immunity decay rates between patients with anti-CD20 treatments and healthy volunteers, but inefficient humoral or CMI after a third SARS-CoV-2 vaccine in most two-dose humoral non-responders calling for individually tailored vaccination strategies in this population.Trial registration numberNCT04877496; ClinicalTrials.gov number.
    MeSH term(s) Antibodies, Viral ; COVID-19/prevention & control ; COVID-19 Vaccines ; Humans ; Immunity, Cellular ; SARS-CoV-2 ; Vaccines, Synthetic ; Viral Vaccines ; mRNA Vaccines
    Chemical Substances Antibodies, Viral ; COVID-19 Vaccines ; Vaccines, Synthetic ; Viral Vaccines ; mRNA Vaccines
    Language English
    Publishing date 2022-03-31
    Publishing country England
    Document type Clinical Study ; Journal Article
    ZDB-ID 2812592-7
    ISSN 2056-5933 ; 2056-5933
    ISSN (online) 2056-5933
    ISSN 2056-5933
    DOI 10.1136/rmdopen-2021-002166
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: PPAR-γ regulates the effector function of human T helper 9 cells by promoting glycolysis

    Nicole L. Bertschi / Oliver Steck / Fabian Luther / Cecilia Bazzini / Leonhard von Meyenn / Stefanie Schärli / Angela Vallone / Andrea Felser / Irene Keller / Olivier Friedli / Stefan Freigang / Nadja Begré / Susanne Radonjic-Hoesli / Cristina Lamos / Max Philip Gabutti / Michael Benzaquen / Markus Laimer / Dagmar Simon / Jean-Marc Nuoffer /
    Christoph Schlapbach

    Nature Communications, Vol 14, Iss 1, Pp 1-

    2023  Volume 13

    Abstract: Abstract T helper 9 (TH9) cells promote allergic tissue inflammation and express the type 2 cytokines, IL-9 and IL-13, as well as the transcription factor, PPAR-γ. However, the functional role of PPAR-γ in human TH9 cells remains unknown. Here, we ... ...

    Abstract Abstract T helper 9 (TH9) cells promote allergic tissue inflammation and express the type 2 cytokines, IL-9 and IL-13, as well as the transcription factor, PPAR-γ. However, the functional role of PPAR-γ in human TH9 cells remains unknown. Here, we demonstrate that PPAR-γ drives activation-induced glycolysis, which, in turn, promotes the expression of IL-9, but not IL-13, in an mTORC1-dependent manner. In vitro and ex vivo experiments show that the PPAR-γ-mTORC1-IL-9 pathway is active in TH9 cells in human skin inflammation. Additionally, we find dynamic regulation of tissue glucose levels in acute allergic skin inflammation, suggesting that in situ glucose availability is linked to distinct immunological functions in vivo. Furthermore, paracrine IL-9 induces expression of the lactate transporter, MCT1, in TH cells and promotes their aerobic glycolysis and proliferative capacity. Altogether, our findings uncover a hitherto unknown relationship between PPAR-γ-dependent glucose metabolism and pathogenic effector functions in human TH9 cells.
    Keywords Science ; Q
    Subject code 570
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Urticaria and Angioedema: an Update on Classification and Pathogenesis.

    Radonjic-Hoesli, Susanne / Hofmeier, Kathrin Scherer / Micaletto, Sara / Schmid-Grendelmeier, Peter / Bircher, Andreas / Simon, Dagmar

    Clinical reviews in allergy & immunology

    2017  Volume 54, Issue 1, Page(s) 88–101

    Abstract: Urticaria is a common, mast cell-driven disease presenting with wheals or angioedema or both. In the last years, urticaria has increasingly attracted notice to clinicians and researchers, last but not least inspired by the approval of omalizumab, an anti- ...

    Abstract Urticaria is a common, mast cell-driven disease presenting with wheals or angioedema or both. In the last years, urticaria has increasingly attracted notice to clinicians and researchers, last but not least inspired by the approval of omalizumab, an anti-IgE antibody, for urticaria treatment. There is wide consensus on the clinical classification based on duration and elicitation. However, the pathogenesis is incompletely understood. This review summarizes current guidelines for the management and novel insights in the pathogenesis of urticaria with special focus on their impact on clinical praxis. The classification of urticaria subgroups is mainly based on clinical criteria: acute and chronic urticaria (CU). Chronic urticaria comprises both chronic spontaneous urticaria (CSU) and chronic inducible urticaria (CIndU) that includes physical and non-physical urticarias. Recent research focused on characterizing the role of cells and mediators involved in the pathogenesis of urticaria, identifying the mechanisms of mast cell activation, and investigating underlying autoimmune processes in chronic spontaneous urticarial. Currently, non-sedating antihistamines and omalizumab, an antiimmunoglobulin E antibody, are recommended for the therapy of chronic urticaria, as both exhibit a favorable efficacy and safety profile. Novel therapeutic strategies aim at specifically targeting cells and mediators involved in the pathogenesis of urticaria.
    MeSH term(s) Angioedema/immunology ; Angioedema/therapy ; Anti-Allergic Agents/therapeutic use ; Antibodies, Anti-Idiotypic/therapeutic use ; Chronic Disease ; Humans ; Mast Cells/immunology ; Omalizumab/therapeutic use ; Urticaria/immunology ; Urticaria/therapy
    Chemical Substances Anti-Allergic Agents ; Antibodies, Anti-Idiotypic ; anti-IgE antibodies ; Omalizumab (2P471X1Z11)
    Language English
    Publishing date 2017-07-26
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1239045-8
    ISSN 1559-0267 ; 1080-0549
    ISSN (online) 1559-0267
    ISSN 1080-0549
    DOI 10.1007/s12016-017-8628-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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