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Neutrophil extracellular traps mediate articular cartilage damage and enhance the immunogenicity of cartilage components in rheumatoid arthritis

ABSTRACT: Neutrophil extracellular traps mediate articular cartilage damage and enhance the immunogenicity of cartilage components in rheumatoid arthritis

PROVIDER: PRJNA632502 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11783200.fastq.gz	Fastqsanger.gz
	SRR11783201.fastq.gz	Fastqsanger.gz
	SRR11783198.fastq.gz	Fastqsanger.gz
	SRR11783199.fastq.gz	Fastqsanger.gz

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Neutrophil extracellular traps mediate articular cartilage damage and enhance the immunogenicity of cartilage components in rheumatoid arthritis

Project description:This study invesigates the effects of neutrophil extracellular traps (NETs) on articular cartilage degredation and resulting autoimmune responses in rheumatoid arthritis.

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Project description:The aim of the current study was to identify molecular markers for articular cartilage that can be used for the quality control of tissue engineered cartilage. Therefore a genom-wide expression analysis was performed using RNA isolated from articular and growth plate cartilage, both extracted from the knee joints of minipigs. Keywords: Native material or primary cells isolated from articular cartilage and growth plate cartilage Articular and growth plate cartilage were taken for RNA extraction and hybridization on Affymetrix microarrays. Furthermore chondrocytes from each type of cartilage were isolated and cell culture was started and terminated at day 10 or day 20. Total RNA from cultivated cells was extracted, and hybridization on Affymetrix microarrays was performed.

2011-07-28 | E-GEOD-23492 | biostudies-arrayexpress

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2011-07-29 | GSE23492 | GEO

horse articular cartilage explant secretome

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Project description:Chondrocyte gene expression was analyzed to study mechanisms involved in the structural and functional adaptation of articular cartilage during postnatal maturation. Transcriptional profiling was used to compare articular chondrocytes between four neonatal and four adult horses. Expressional differences featured matrix proteins and matrix-modifying enzymes reflecting the transition from cartilage growth to cartilage homeostasis. Keywords: articular cartilage, maturation, horse, cDNA microarray

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Project description:Articular cartilage is deprived of blood vessels and nerves, and the only cells residing in this tissue are chondrocytes. The molecular properties of the articular cartilage and the architecture of the extracellular matrix demonstrate a complex structure that differentiates on the depth of tissue. Osteoarthritis (OA) is a degenerative joint disease, the most common form of arthritis, affecting the whole joint. It is associated with ageing and affects the joints that have been continually stressed throughout life including the knees, hips, fingers, and lower spine region. OA is a multifactorial condition of joint characterised by articular cartilage loss, subchondral bone sclerosis, and inflammation leading to progressive joint degradation, structural alterations, loss of mobility and pain. Articular cartilage biology is well studied with a focus on musculoskeletal diseases and cartilage development. However, there are relatively few studies focusing on zonal changes in the cartilage during osteoarthritis.

2022-05-19 | PXD029116 | Pride

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Project description:We performed RNA-Seq analysis to investigate the gene expression patterns of rat articular cartilage and xiphoid cartilage.

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Project description:Mouse hip articular cartilage was collected every 4 hour for 48 hours and analysed by mass spec

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Neutrophil extracellular traps mediate articular cartilage damage and enhance cartilage component immunogenicity in rheumatoid arthritis.

Project description:Rheumatoid arthritis (RA) is characterized by synovial joint inflammation, cartilage damage, and dysregulation of the adaptive immune system. While neutrophil extracellular traps (NETs) have been proposed to play a role in the generation of modified autoantigens and in the activation of synovial fibroblasts, it remains unknown whether NETs are directly involved in cartilage damage. Here, we report a new mechanism by which NET-derived elastase disrupts cartilage matrix and induces release of membrane-bound peptidylarginine deiminase-2 by fibroblast-like synoviocytes (FLSs). Cartilage fragments are subsequently citrullinated, internalized by FLSs, and then presented to antigen-specific CD4+ T cells. Furthermore, immune complexes containing citrullinated cartilage components can activate macrophages to release proinflammatory cytokines. HLA-DRB1*04:01 transgenic mice immunized with NETs develop autoantibodies against citrullinated cartilage proteins and display enhanced cartilage damage. Inhibition of NET-derived elastase rescues NET-mediated cartilage damage. These results show that NETs and neutrophil elastase externalized in these structures play fundamental pathogenic roles in promoting cartilage damage and synovial inflammation. Strategies targeting neutrophil elastase and NETs could have a therapeutic role in RA and in other inflammatory diseases associated with inflammatory joint damage.

| S-EPMC7406272 | biostudies-literature

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Project description:Induced pluripotent stem cells (iPSCs) are a promising resource for allogeneic cartilage transplantation to treat articular cartilage defects that do not heal spontaneously and often progress to debilitating conditions, such as osteoarthritis. However, to the best of our knowledge, allogeneic cartilage transplantation into primate models has never been assessed. Here, we show that allogeneic iPSC-derived cartilage organoids survive and integrate as well as function as articular cartilage in a primate model of chondral defects in the knee joints. Histological analysis revealed that allogeneic iPSC-derived cartilage organoids in chondral defects elicited no immune reaction and directly contributed to the tissue repair for at least four months. iPSC-derived cartilage organoids integrated with the host native articular cartilage and prevented degeneration of the surrounding cartilage. Single-cell RNA-sequence analysis indicated that iPSC-derived cartilage organoids differentiated after transplantation, acquiring expression of PRG4 that is crucial for joint lubrication. Pathway analysis suggested the involvement of SIK3 inactivation, verified through molecular experiments. Our study outcomes suggest that allogeneic transplantation of iPSC-derived cartilage organoids may be clinically applicable for the treatment of patients with chondral defects of the articular cartilage.

2023-01-23 | GSE206120 | GEO

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