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- Ottman, N, et al.
(författare)
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Reply
- 2019
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Ingår i: The Journal of allergy and clinical immunology. - : Elsevier BV. - 1097-6825 .- 0091-6749. ; 144:4, s. 1139-1140
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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- Anthoni, M, et al.
(författare)
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Smad3 regulates dermal cytokine and chemokine expression and specific antibody production in murine responses to a respiratory chemical sensitizer
- 2010
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Ingår i: International archives of allergy and immunology. - : S. Karger AG. - 1423-0097 .- 1018-2438. ; 151:2, s. 155-167
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Tidskriftsartikel (refereegranskat)abstract
- <i>Background:</i> The cytokine transforming growth factor-β(TGF-β) has important regulatory roles in the immune system. To investigate the role of intact TGF-β signaling during the contact hypersensitivity (CHS) response to a respiratory allergen, we exposed Smad3–/– mice to topical trimellitic anhydride (TMA). <i>Methods:</i> CHS was induced by topical application of TMA. The swelling of the TMA-exposed ears was analyzed, and lymph node, ear tissue and skin biopsies were collected for RNA isolation, histology and histochemical analyses. Lymph node cell proliferation was measured and blood samples were collected for analysis of TMA-specific immunoglobulin. <i>Results:</i> Topical TMA exposure resulted in increased mRNA expression of proinflammatory and suppressive cytokines (IL-1β, TNF-α, IL-6, IFN-γ, IL-4, IL-10, IL-17, IL-23, TGF-β), chemokines (CXCL9, CXCL10, CCL24) and chemokine receptors (CCR7, CCR8, CXCR2), increased numbers of CD3+ T cells in ear tissue, and lymphadenopathy in the Smad3–/– mice. The IL-10 result was confirmed at the protein level by immunohistochemistry. However, the ear-swelling response and infiltration of eosinophils, F4/80+ cells, CD11c+ cells and mast cells were similar in the Smad3–/– mice compared to their wild-type (WT) siblings. While TMA-specific IgE was induced equally in the WT and Smad3–/– mice, the concentration of TMA-specific IgG2a was significantly lower in the Smad3–/– mice. <i>Conclusions:</i> The Smad3 molecule contributes significantly to the regulation of the cytokine and chemokine network during the CHS response to TMA. The lack of Smad3 resulted in a potent Th2 shift, confirmed by strongly impaired IgG2a levels.
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- Fyhrquist, N, et al.
(författare)
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Microbe-host interplay in atopic dermatitis and psoriasis
- 2019
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Ingår i: Nature communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 10:1, s. 4703-
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Tidskriftsartikel (refereegranskat)abstract
- Despite recent advances in understanding microbial diversity in skin homeostasis, the relevance of microbial dysbiosis in inflammatory disease is poorly understood. Here we perform a comparative analysis of skin microbial communities coupled to global patterns of cutaneous gene expression in patients with atopic dermatitis or psoriasis. The skin microbiota is analysed by 16S amplicon or whole genome sequencing and the skin transcriptome by microarrays, followed by integration of the data layers. We find that atopic dermatitis and psoriasis can be classified by distinct microbes, which differ from healthy volunteers microbiome composition. Atopic dermatitis is dominated by a single microbe (Staphylococcus aureus), and associated with a disease relevant host transcriptomic signature enriched for skin barrier function, tryptophan metabolism and immune activation. In contrast, psoriasis is characterized by co-occurring communities of microbes with weak associations with disease related gene expression. Our work provides a basis for biomarker discovery and targeted therapies in skin dysbiosis.
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