Cytokines correlation with metabolomic profiling of psoriatic and normal skin
Ontology highlight
ABSTRACT:
ORGANISM(S): Human Homo Sapiens
TISSUE(S): Keratinocytes
SUBMITTER: 
Maureen Kachman
PROVIDER: ST000697 | MetabolomicsWorkbench | Mon Jun 19 00:00:00 BST 2017
REPOSITORIES: MetabolomicsWorkbench
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Project description:Insight into the pathophysiology of inflammatory skin diseases, especially at the proteomic level, is severely hampered by the lack of adequate in situ data. Skin microdialysis samples from patients with atopic dermatitis (AD, n=6), psoriasis vulgaris (PSO, n=7) or prurigo nodularis (PN, n=6), as well as healthy controls (n=7) were subjected to proteomics and multiplex cytokine analysis. Single-cell RNA sequencing of skin biopsy specimens was used to identify the cellular origin of cytokines. Among the top 20 enriched GO annotations, NAD metabolic process, regulation of secretion by cell, and pyruvate metabolic process were elevated in microdialysates from lesional AD skin compared with both nonlesional skin and controls. The top 20 enriched KEGG pathways in these three groups overlapped almost completely. In contrast, nonlesional skin from patients with PSO or PN and control skin showed no overlap with lesional skin in this KEGG pathway analysis. Lesional skin from patients with PSO, but not AD or PN, showed significantly elevated protein levels of IL-22 and MCP-1 compared to nonlesional skin. IL-8 was elevated in lesional vs nonlesional AD and PSO skin, whereas IL-12p40 was higher only in lesional PSO skin. Integrated single-cell RNA-seq data revealed identical cellular sources of these cytokines in AD, PSO and PN. Based on microdialysate, proteomic data of lesional PSO and PN skin, but not lesional AD skin, differed significantly from those of nonlesional skin. IL-8, IL-22, MCP-1 and IL-12p40 might be suitable markers for minimally invasive molecular profiling.
2024-08-22 | PXD050245 | Pride
Project description:The IL-23/IL-17 immune axis is of central importance in psoriasis. However, the contribution of IL-17 family cytokines other than IL-17A to drive skin inflammation in psoriasis has not been fully established. To further elucidate the role of individual IL-17 family cytokines in psoriasis, we investigated their expression and localization in psoriasis skin at the mRNA and protein level. Moreover, we investigated the gene expression signatures induced by individual IL-17 family cytokines in human skin ex vivo as well as modulation of responses induced by the combination of IL-17 family cytokines in human keratinocytes by brodalumab, a human monoclonal antibody targeting the IL-17RA, versus the IL-17A blocking antibody ixekizumab. We demonstrate that IL-17A, IL-17AF, IL-17F and IL-17C are expressed at increased levels in psoriasis lesional skin and induce inflammatory gene expression signatures in human skin ex vivo that correlate with those observed in psoriasis. Furthermore, we show that brodalumab, in contrast to ixekizumab, fully blocks gene expression responses induced by the combination of IL-17A, IL-17AF, IL-17F and IL-17C in human keratinocytes. These findings suggest that inhibition of several IL-17 family cytokines, e.g. by targeting of the IL-17RA receptor, could be a favored mechanism to obtain a profound suppression of the inflammatory processes in psoriasis and thereby achieve high levels of skin clearance and sustained efficacy in patients with psoriasis.
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Project description:The efficacy of monoclonal antibodies against either interleukin (IL)-17 or the IL-17 receptor in psoriasis therapy provides strong evidence that IL-17 is the major inflammatory mediation in this disease. However, how IL-17 induces epidermal hyperplasia in psoriasis remains largely unknown. Here, we show that IL-17 actives NF-kB in keratinocytes and initiates the NF-kB-dependent transcription of microRNA-31 (miR-31), one of the most abundant microRNAs in the epidermis of lesional skin of psoriasis and two related mouse models. Similar to IL-17 deficiency (IL-17-/-), knocking out miR-31 (miR-31-/-) or targeting it by antagomir-31 prevents keratinocytes Ki67 expression and inhibits acanthosis and dermal inflammation in psoriasis mouse model. Moreover, PPP6c, a negative regulator restricting G0/G1 to G2/M phase progression in the cell cycle, is diminished in human psoriatic epidermis and is directly targeted by miR-31. Inhibition of ppp6c is functionally important for the biological effects of miR-31 in the development of epidermal hyperplasia. Thus, our data define IL-17-inducede miR-31 and its target ppp6c as critical factors for hyperproliferative epidermis in psoriasis. Epidermis samples from affected ears derived from 3 CD18hypo PL/J mice (DIS) or normal ears derived from 3 CD18hypo C57BL/6J mice(2128) were used for RNA extraction and hybridization on Affymetrix microarrays. We sought to compare miRNA expression of normal skin from control and lesional skin.
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Project description:Psoriasis is a chronic inflammatory disease of the skin for which no cure has emerged. Its complex etiology requires the development of an in vitro model that appropriately recapitulates the physiopathology of this disease. In this study, we exploited the self-assembly method in order to develop a new tissue-engineered model of psoriatic skin substitutes. To circumvent the addition of immune cells, we supplemented the reconstructed psoriatic substitutes with a cocktail of four cytokines, TNF-α, IL-1α, IL-6 and IL-17, and monitored their impact on global gene expression by DNA microarray. The cytokines-supplemented substitutes have a more irregular epidermis, with protuberances and much thinner areas. Most interestingly, gene profiling on microarrays identified several genes reported as being deregulated psoriasis skin in vivo. Indeed, expression of the S100A12, IL8, DEFB4A and KYNU genes increased dramatically compared to their level in normal skin substitutes (P <0.005 to <0.05). In addition, the ACSBG1 gene, reported to be repressed in psoriasis, was also repressed in the cytokines-supplemented psoriatic substitutes compared to the controls (P <0.005). The product encoded by the genes deregulated in the cytokines-supplemented substitutes belong to biological pathways, such as the inflammatory and the immune responses, that are similarly altered in psoriasis in vivo. In conclusion, addition of cytokines to involved psoriatic substitutes alters the transcriptome of these cells in a manner similar to that observed with psoriasis in vivo. The addition of this pro-inflammatory cocktail, comparable cytokine in vivo psoriasis, prepares us for the next step: the characterization of the model once added immune cells. Tissue-engineered psoriatic human skin (TEPHS) cultivated with (number of replicates: 3) or without (number of replicates: 3) Cytokines (IL-17a, IL-6, IL1a, TNF-a).
2015-04-11 | E-GEOD-67762 | biostudies-arrayexpress
Project description:The efficacy of monoclonal antibodies against either interleukin (IL)-17 or the IL-17 receptor in psoriasis therapy provides strong evidence that IL-17 is the major inflammatory mediation in this disease. However, how IL-17 induces epidermal hyperplasia in psoriasis remains largely unknown. Here, we show that IL-17 actives NF-kB in keratinocytes and initiates the NF-kB-dependent transcription of microRNA-31 (miR-31), one of the most abundant microRNAs in the epidermis of lesional skin of psoriasis and two related mouse models. Similar to IL-17 deficiency (IL-17-/-), knocking out miR-31 (miR-31-/-) or targeting it by antagomir-31 prevents keratinocytes Ki67 expression and inhibits acanthosis and dermal inflammation in psoriasis mouse model. Moreover, PPP6c, a negative regulator restricting G0/G1 to G2/M phase progression in the cell cycle, is diminished in human psoriatic epidermis and is directly targeted by miR-31. Inhibition of ppp6c is functionally important for the biological effects of miR-31 in the development of epidermal hyperplasia. Thus, our data define IL-17-inducede miR-31 and its target ppp6c as critical factors for hyperproliferative epidermis in psoriasis.
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Project description:Basophils are important effector cells in allergic inflammation, anti-parasitic immune response and skin disorders. A number of activators including interleukin 3 (IL-3) and IgE have been identified in the regulation of human basophils expressing mediators such as histamine and leukotriene C4 (LTC4) and cytokines, including IL-4 and IL-13. Human basophils express high levels of IL-2 receptors. However, the function of the IL-2 pathway in basophils remains unknown. Here, we identify that IL-2-stimulated human basophils in vitro express a variety of inflammatory cytokines and chemokines including IL-5, IL-13, GM-CSF and CCL-17. Of note, one of the top regulated cytokines, IL-5, was for the first time identified to be expressed in human basophils and was distinctly regulated by IL-2, independently of IL-3 and IgE. Immunofluorescence analysis of skin specimens from bullous pemphigoid and eczema revealed that infiltrating basophils in skin lesions widely express IL-5 and GM-CSF. Together, our findings reveal IL-2 as a novel regulator of human basophils to express IL-5 and GM-CSF in skin disorders. This adds a new layer to support the importance of basophils in skin disorders.
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Project description:Primary HBE cells were stimulated with IL-22 and IL-17, and gene expression was studied using an Affymetrix platform microarray, in order to investigate which genes may be upregulated or downregulated in response to these cytokines. Of particular interest was the host defense genes such as antimicrobial peptides, which have been shown to be upregulated by IL-22 and IL-17 in skin keratinocytes. Keywords: cytokine effect
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Project description:Background: IL-17 is the defining cytokine of the Th17, Tc17, and γδ T cell populations that plays a critical role in mediating inflammation and autoimmunity. Psoriasis vulgaris is an inflammatory skin disease mediated by Th1 and Th17 cytokines with relevant contributions of IFN-γ, TNF-α, and IL-17. Despite the pivotal role IL-17 plays in psoriasis, and in contrast to the other key mediators involved in the psoriasis cytokine cascade that are capable of inducing broad effects on keratinocytes, IL-17 was demonstrated to regulate the expression of a limited number of genes in monolayer keratinocytes cultured in vitro. Methodology/Principal Findings: Given the clinical efficacy of anti-IL-17 agents is associated with an impressive reduction in a large set of inflammatory genes, we sought a full-thickness skin model that more closely resemble in vivo epidermal architecture. Using a reconstructed human epidermis (RHE), IL-17 was able to upregulate 419 gene probes and downregulate 216 gene probes. As possible explanation for the increased gene induction in the RHE model is that CEBPβ, the transcription factor regulating IL-17-responsive genes, is expressed in differentiated KCs. Conclusions/Significance: The genes identified in IL-17-treated RHE are likely relevant to the IL-17 effects in psoriasis, since ixekizumab (anti-IL-17A agent) strongly suppressed the “RHE” genes in psoriasis patients treated in vivo with this IL-17 antagonist. RHE samples were treated with IFNg, IL-22 and IL-17 and compared with control
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Project description:Interventions: A:CEA-CART
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