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TL1A deficiency attenuates osteoarthritis by regulating oxidative stress-induced senescence in articular chondrocytes [I]

ABSTRACT: Osteoarthritis (OA) is a prevalent degenerative joint disease characterized by progressive cartilage degradation, chronic inflammation, and chondrocyte senescence. Tumor necrosis factor-like cytokine 1A (TL1A), a member of the TNF superfamily, has recently been implicated in regulating inflammatory processes and tissue remodeling. However, its precise role in OA pathogenesis remains incompletely understood. In this study, we investigated the impact of TL1A deficiency on OA progression and its underlying mechanism with a focus on oxidative stress-induced chondrocyte senescence.

ORGANISM(S): Homo sapiens

PROVIDER: GSE286153 | GEO | 2025/02/01

REPOSITORIES: GEO

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TL1A deficiency attenuates osteoarthritis by regulating oxidative stress-induced senescence in articular chondrocytes [II]

Project description:Osteoarthritis (OA) is a prevalent degenerative joint disease characterized by progressive cartilage degradation, chronic inflammation, and chondrocyte senescence. Tumor necrosis factor-like cytokine 1A (TL1A), a member of the TNF superfamily, has recently been implicated in regulating inflammatory processes and tissue remodeling. However, its precise role in OA pathogenesis remains incompletely understood. In this study, we investigated the impact of TL1A deficiency on OA progression and its underlying mechanism with a focus on oxidative stress-induced chondrocyte senescence.

2025-02-01 | GSE286154 | GEO

Osteoarthritis-related changes in gene expression in knee articular chondrocytes in a rat model of osteoarthritis.

Project description:Cartilage destruction in osteoarthritis (OA) results from disturbed chondrocyte metabolism. Here, we used microarrays to show that TGF alpha and CCL2 are simultaneously upregulated in a rat model of OA and cooperate to drive cartilage degradation. The goals of the experiments included here were to a) characterize gene expression in knee joint articular chondrocytes at various stages of development of OA (2 and 8 weeks after surgical induction of OA), and b) to establish trends in gene expression among groups of genes related to the TGF alpha-EGFR axis, over time, in OA. The model chosen to study these results has been previously validated (Appleton, CT et al, 2007, Arthritis Rheum) and used to describe similar gene expression results at a different time point (4 weeks) after induction of OA. The rat model of OA involves surgical destabilization of the knee joint, followed by forced low-intensity mobilization over several weeks; a sham surgery is used as the control (representing a healthy non-OA knee joint) wherein a surgical incision is made but not structural (i.e. ligamentous) modification is made to the joint. Altogether, our data indicate that TGF and CCL2 cooperate to drive cartilage degradation in osteoarthritis. A total of 12 samples were analyzed. 3 replicates were used per condition: OA surgery at 2 weeks, OA surgery at 8 weeks, Sham (control) surgery at 2 weeks and Sham surgery at 8 weeks. Expression of OA samples was assessed relaitve to Sham (control) expression levels.

2012-11-15 | E-GEOD-42295 | biostudies-arrayexpress

Osteoarthritis-related changes in gene expression in knee articular chondrocytes in a rat model of osteoarthritis.

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MYL3 protects chondrocytes from senescence by inhibiting clathrin-mediated endocytosis and activating of Notch signaling

Project description:As the unique cell type in articular cartilage, chondrocyte senescence is a crucial cellular event contributing to osteoarthritis development. Here we show that clathrin-mediated endocytosis and activation of Notch signaling promotes chondrocyte senescence and osteoarthritis development, which is negatively regulated by myosin light chain 3. Myosin light chain 3 (MYL3) protein levels decline sharply in senescent chondrocytes of cartilages from model mice and osteoarthritis (OA) patients. Conditional deletion of Myl3 in chondrocytes significantly promoted, whereas intra-articular injection of adeno-associated virus overexpressing MYL3 delayed, OA progression in male mice. MYL3 deficiency led to enhanced clathrin-mediated endocytosis by promoting the interaction between myosin VI and clathrin, further inducing the internalization of Notch and resulting in activation of Notch signaling in chondrocytes. Pharmacologic blockade of clathrin-mediated endocytosis-Notch signaling prevented MYL3 loss-induced chondrocyte senescence and alleviated OA progression in mice. Our results establish a previously unknown mechanism essential for cellular senescence and provide a potential therapeutic direction for OA.

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Project description:Osteoarthritis (OA) is a prevalent degenerative disease, which involves progressive and irreversible destruction of cartilage matrix. Despite efforts to reconstruct cartilage matrix in osteoarthritic joints, it has been a difficult task as adult cartilage exhibits marginal repair capacity. Here we report the identification of tankyrase as a regulator of the cartilage anabolism axis based on systems-level factor analysis of mouse reference populations. Tankyrase inhibition drives the expression of a cartilage-signature matrisome and elicits a transcriptomic pattern that is inversely correlated with OA progression. Furthermore, tankyrase inhibitors ameliorate surgically-induced OA in mice, and stem cell transplantation coupled with tankyrase knockdown results in superior regeneration of cartilage lesions. Mechanistically, the pro-regenerative features of tankyrase inhibition are mainly triggered by uncoupling SOX9 from a poly(ADP-ribosyl)ation (PARylation)-dependent protein degradation pathway. Our findings provide insights into the development of future OA therapies aimed at reconstruction of articular cartilage.

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Integrated molecular phenotyping in chondrocytes identifies genes and pathways disrupted in osteoarthritis

Project description:Osteoarthritis (OA) is a degenerative joint disease with a substantial health economic burden. There is no current treatment; instead, disease management targets the main symptoms (pain and stiffness) and culminates in joint replacement surgery. OA is a disease of cartilage degeneration, but the molecular changes leading to the development of OA are still poorly understood. In this study we compare methylation, gene transcription and protein abundance at the genome-wide level in individually-matched samples of chondrocytes extracted from affected and relatively healthy articular cartilage across 12 OA patients undergoing total knee replacement. Integration analysis highlights genes that are consistently affected at multiple levels, including AQP1, CLEC3B and COL1A1, and also relevant biological pathways such as extracellular matrix organization, collagen catabolism and proteolysis. Collectively these results provide a first view of the comprehensive molecular landscape underpinning OA development and point to potential therapeutic avenues.

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Genome-Wide Differentially Methylated Region Analysis to Reveal Epigenetic Differences of Articular Cartilage in Kashin-Beck Disease and Osteoarthritis

Project description:Kashin-Beck disease (KBD) is a degenerative osteoarticular disorder, and displays the significant differences with osteoarthritis (OA) regarding the etiology and molecular changes in articular cartilage. However, the underlying dysfunctions of molecular mechanisms in KBD and OA remain unclear. Here, we performed the various genome-wide differentially methylated region analyses to reveal the distinct differentially methylated regions (DMRs) and corresponding differentially methylated genes (DMGs), and enriched functional pathways/GO terms for KBD and OA.

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KLF9-GRK5-HDAC6 axis aggravates osteoarthritis pathogenesis by promoting chondrocyte extracellular matrix degradation and apoptosis

Project description:Osteoarthritis (OA) is a degenerative joint disease that affects the cartilage and surrounding tissues. The transcription factor Kruppel-like family factor 9 (KLF9) has been identified as a regulator of tumorigenesis. However, its role in OA is still not fully understood. Herein, this study aimed to access the potential role and molecular mechanism by which KLF9 regulates OA development. KLF9 was upregulated in cartilage tissues of OA patients and medial meniscotibial ligament (MMTL)-induced OA rats, as well as in IL-1β-treated chondrocytes. Furthermore, knockdown of KLF9 inhibited OA-related cartilage injury, as evidenced by inhibiting chondrocyte extracellular matrix (ECM) degradation, increasing chondrocyte viability, and decreasing apoptosis. Conversely, overexpression of KLF9 had the opposite effect. The downstream mechanism of KLF9 was confirmed. KLF9 mediated the transcription of G protein-coupled receptor kinase 5 (GRK5) by directly targeting the GRK5 promoter. GRK5 knockdown eliminated the effects of KLF9 overexpression on chondrocyte dysfunction. It was also found that GRK5 combined with histone deacetylase 6 (HDAC6) and promoted HDAC6 phosphorylation. The use of the HDAC6 inhibitor TubastatinA also abolished the effects of GRK5 overexpression on chondrocyte ECM degradation and apoptosis. These results demonstrate that the KLF9-GRK5-HDAC6 axis plays a crucial role in promoting the progression of OA.

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