Attenuation of Fibroblast Activation and Fibrosis by Adropin in Systemic Sclerosis (SSc)
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PROVIDER: PRJNA1057863 | ENA |
REPOSITORIES: ENA
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Project description:Fibrotic diseases impose a major socioeconomic challenge on modern societies with limited treatment options. Adropin, a peptide hormone encoded by the energy-homeostasis-associated (ENHO) gene, is implicated in metabolism and vascular homeostasis, but its role in the pathogenesis of fibrosis remains enigmatic. Here, we used machine learning approaches in combination with functional in vitro and in vivo experiments to characterize Adropin/ENHO as a potential regulator involved in fibroblast activation and tissue fibrosis in systemic sclerosis (SSc). We demonstrated consistent downregulation of Adropin/ENHO in SSc skin across different SSc cohorts. The prototypical profibrotic cytokine TGFβ reduced Adropin/ENHO expression in a JNK-dependent manner. Restoration of Adropin signaling by therapeutic application of bioactive Adropin34-76 peptides in turn inhibited TGFβ-induced fibroblast activation and fibrotic tissue remodeling in primary human dermal fibroblasts, three-dimensional full-thickness skin equivalents, the mouse models of bleomycin-induced pulmonary fibrosis and sclerodermatous chronic graft-versus-host-disease (sclGvHD), and precision-cut human skin slices (PCSS). Knockdown of GPR19, receptor of Adropin, abrogated the antifibrotic effects of Adropin in fibroblasts. RNA-seq demonstrated that the antifibrotic effects of Adropin34-76 were functionally linked to deactivation of GLI1 dependent profibrotic transcriptional networks, which was experimentally confirmed in vitro, in vivo and ex vivo. ChIP-seq confirmed Adropin34-76-induced changes in TGFβ/GLI1 signaling. Our study thus characterizes the TGFβ-induced downregulation of Adropin/ENHO expression as a potential pathomechanism of SSc as a prototypical systemic fibrotic disease that unleashes uncontrolled activation of profibrotic GLI1 signaling. We also provide evidence in multiple preclinical models that Adropin34-76 might offer potential for the treatment of fibrosis.
2024-04-29 | GSE252425 | GEO
Project description:Fibrotic diseases impose a major socioeconomic challenge on modern societies with limited treatment options. Adropin, a peptide hormone encoded by the energy-homeostasis-associated (ENHO) gene, is implicated in metabolism and vascular homeostasis, but its role in the pathogenesis of fibrosis remains enigmatic. Here, we used machine learning approaches in combination with functional in vitro and in vivo experiments to characterize Adropin/ENHO as a potential regulator involved in fibroblast activation and tissue fibrosis in systemic sclerosis (SSc). We demonstrated consistent downregulation of Adropin/ENHO in SSc skin across different SSc cohorts. The prototypical profibrotic cytokine TGFβ reduced Adropin/ENHO expression in a JNK-dependent manner. Restoration of Adropin signaling by therapeutic application of bioactive Adropin34-76 peptides in turn inhibited TGFβ-induced fibroblast activation and fibrotic tissue remodeling in primary human dermal fibroblasts, three-dimensional full-thickness skin equivalents, the mouse models of bleomycin-induced pulmonary fibrosis and sclerodermatous chronic graft-versus-host-disease (sclGvHD), and precision-cut human skin slices (PCSS). Knockdown of GPR19, receptor of Adropin, abrogated the antifibrotic effects of Adropin in fibroblasts. RNA-seq demonstrated that the antifibrotic effects of Adropin34-76 were functionally linked to deactivation of GLI1 dependent profibrotic transcriptional networks, which was experimentally confirmed in vitro, in vivo and ex vivo. ChIP-seq confirmed Adropin34-76-induced changes in TGFβ/GLI1 signaling. Our study thus characterizes the TGFβ-induced downregulation of Adropin/ENHO expression as a potential pathomechanism of SSc as a prototypical systemic fibrotic disease that unleashes uncontrolled activation of profibrotic GLI1 signaling. We also provide evidence in multiple preclinical models that Adropin34-76 might offer potential for the treatment of fibrosis.
2024-04-29 | GSE252139 | GEO
Project description:Attenuation of Fibroblast Activation and Fibrosis by Adropin in Systemic Sclerosis (SSc)
| PRJNA1060624 | ENA
Project description:Systemic sclerosis (SSc) is a complex and still unclear rare disease associated with fibrosis in multiple organs. Microbiota has recently emerged as an important environmental factor in SSc pathogenesis, either at gut, oral and skin level.
2023-12-28 | GSE200486 | GEO
Project description:Autoantibodies (Aab) are frequent in systemic sclerosis (SSc). While recognized as potent biomarkers, their pathogenic role is much debated. This study explored the effect of purified IgG from SSc patients on the phenotype and function of healthy dermal fibroblast (FB) using an innovative multi-omics approach.
2022-06-29 | PXD025885 | Pride
Project description:Myofibroblasts are key effector cells in the extracellular matrix remodeling of systemic sclerosis-associated interstitial lung disease (SSc-ILD), however the diversity of fibroblast populations present in the healthy and SSc-ILD lung is unknown, and has prevented the specific study of the myofibroblast transcriptome. We sought to identify and define the transcriptomes of myofibroblasts and other mesenchymal cell populations in human healthy and SSc-ILD lungs to understand how alterations in fibroblast phenotypes lead to SSc-ILD fibrosis.
2019-08-14 | GSE128169 | GEO
Project description:Skin and lung fibrosis in systemic sclerosis (SSc) is driven by myofibroblasts, alpha-smooth muscle actin (SMA) expressing cells that produce matrix as well as increase tension on surrounding tissues. Myofibroblast progenitors have been described to arise from a variety of cell types in murine fibrosis models, but relatively modest insight is available as to their source and differentiation in fibrotic human diseases. We utilize single cell RNA-sequencing to examine the transcriptome changes that occur in fibroblasts in SSc skin and during myofibroblast differentiation. We show that dermal myofibroblasts arise from an SFRP2/DPP4-expressing progenitor fibroblast population. In SSc skin, fibroblasts undergo global changes in gene expression, including SFRP2-expressing fibroblasts, which globally upregulate expression of markers, such as PRSS23 and THBS1. However, only a fraction of SSc fibroblasts differentiate into myofibroblasts, as shown by expression of additional markers, such as SFRP4 and FNDC1. These results indicate that myofibroblasts derive from a specific fibroblast subpopulation in SSc skin, that their differentiation proceeds in two stages and that other fibroblast populations also shift transcriptomes in SSc skin, suggesting a cytokine driven process. The myofibroblast transcriptome implicates upstream transcription factors that should help further unravel the drivers of myofibroblast differentiation.
2021-05-20 | GSE138669 | GEO
Project description:In systemic sclerosis (SSc) evidence suggests abnormal keratinocyte-fibroblast interactions. We investigated the potential epidermal dysfunction in SSc and its effects on dermis homeostasis. Epidermal equivalents (EE) were generated from six healthy donor (HD) and four SSc keratinocytes. Skin and EE expression of proliferation, differentiation, and activation markers was evaluated by immunohistochemistry. The transcriptomic profile of SSc-EE and HD-EE was identified by RNAseq analysis. EE conditioned medium (CM) was used to stimulate fibroblasts, and their production of interleukin (IL)-6, IL-8, matrix metalloproteinase (MMP)-1, type-I collagen (col-I), and fibronectin was assessed by ELISA. Compared to HD, SSc-EE exhibited aberrant differentiation, enhanced expression of activation markers, and lower mitotic rate of basal keratinocytes, reproducing most of the abnormalities observed in SSc epidermis. RNAseq analysis revealed that, compared to HD-EE, SSc-EE were characterized by the downregulation of HOX gene family members and by the upregulation of metabolic and oxidative stress molecular pathways. EE-CM enhanced the fibroblast production of IL-6, IL-8, MMP-1, Col-I, and fibronectin (p<0.05). Except for Col-I and fibronectin, this effect was 2-fold higher in the presence of CM generated form SSc-EE. IL-1 was, at least in part, responsible for keratinocyte-dependent fibroblast activation. SSc-EE recapitulate the in vivo characteristic of SSc epidermis demonstrating that SSc keratinocytes have an intrinsically altered differentiation program possibly due to the downregulation of genes from the HOX family. The increased metabolic and oxidative stress associated with SSc epidermis may participate to dermis chronic inflammation and fibrosis
2021-08-13 | GSE156173 | GEO
Project description:Objective: MicroRNAs (miRNAs) control key elements of mRNA stability and likely contribute to the dysregulated lung gene expression observed in systemic sclerosis associated interstitial lung disease (SSc-ILD). We analyzed the miRNA gene expression of tissue and cells from SSc-ILD patients. A chronic lung fibrotic murine model was used. Methods: RNA was isolated from lung tissue of 12 SSc-ILD patients and 5 control lungs. High-resolution computed tomography (HRCT) was performed at baseline and 2-3 years after treatment. Lung fibroblasts and PBMCs were isolated from healthy controls and SSc-ILD patients. miRNA and mRNA were analyzed by microarray, quantitative polymerase chain reaction, and/or Nanostring; pathway analysis was performed by DIANA-miRPath v2.0 software. Wild-type and miR-155 deficient (miR-155ko) mice were exposed to bleomycin. Results: Lung miRNA microarray data distinguished patients with SSc-ILD from healthy controls with 185 miRNA differentially expressed (q<0.25). DIANA-miRPath revealed 57 KEGGs pathways related to the most dysregulated miRNAs. miR-155 and miR-143 were strongly correlated with progression of the HRCT score. Lung fibroblasts showed only mild expression of miR-155/miR-21 after several stimuli. miR-155 PBMC expression strongly correlated with lung function tests in SSc-ILD. miR-155ko mice developed milder lung fibrosis, survived longer, and showed a weaker lung induction of several genes after bleomycin exposure compared to wild-type mice. Conclusions: miRNAs are dysregulated in lungs and PBMCs of SSc-ILD patients. Based on mRNA-miRNA interaction analysis and pathway tools, miRNAs may play a role in the progression of the disease. Our findings suggest that targeting miR-155 might provide a novel therapeutic strategy for SSc-ILD. Lung biopsies taken from open lung biopsy from SSc-ILD patients (n=15 samples) and from cancer free control patients (n=5) during ressection of the lung tumor.
2016-08-01 | E-GEOD-81293 | biostudies-arrayexpress