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Inhibition of nuclear receptor RORα attenuates cartilage damage in osteoarthritis by modulating IL-6/STAT3 pathwa

ABSTRACT: Inhibition of nuclear receptor RORα attenuates cartilage damage in osteoarthritis by modulating IL-6/STAT3 pathwa

PROVIDER: PRJNA722842 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14270311_1.fastq.gz	Fastqsanger.gz
	SRR14270311_2.fastq.gz	Fastqsanger.gz
	SRR14270312_1.fastq.gz	Fastqsanger.gz
	SRR14270312_2.fastq.gz	Fastqsanger.gz
	SRR14270313_1.fastq.gz	Fastqsanger.gz

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Inhibition of nuclear receptor RORα attenuates cartilage damage in osteoarthritis by modulating IL-6/STAT3 pathwa

Project description:Osteoarthritis is characterized by cartilage destruction, chronic inflammation, and subchondral sclerosis. Evidence showed that nuclear receptor family is closely associated with cartilage damage in an unclear molecular mechanism. Here, we investigated the role and molecular mechanism of the retinoic acid receptor-related orphan receptor-α (RORα), an important member of nuclear receptor, in regulating cartilage degradation and osteoarthritis pathogenesis. Investigation to osteoarthritis clinical specimen showed that the degree of RORα elevation is positively correlated with the severity of osteoarthritis and cartilage damage. In an in vivo osteoarthritis models induced by anterior crucial ligament transaction, intraarticularly injection of siRora adenovirus reversed the cartilage damage. RORα knock-down increased the protein expression level of anabolic factor such as type II collagen, Aggrecan, and decreased the expression of catabolic factor. RNA-seq data suggested IL-6/STAT3 pathway is significantly down-regulated. Mechanistically, RORα knock-down decreased the expression level of both IL-6 and phosphorylated STAT3. RORα exerted its effect on IL-6/STAT3 signaling in two different ways, which includes interaction with STAT3 and IL6 promoter. Taken together, our findings indicated the pivotal role of RORα/IL-6/STAT3 axis in osteoarthritis progression and confirmed RORα knock-down exerted therapeutic effect in human chondrocyte thus providing a potential drug target in osteoarthritis therapy.

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Inhibition of nuclear receptor RORα attenuates cartilage damage in osteoarthritis by modulating IL-6/STAT3 pathway.

Project description:Osteoarthritis (OA) is characterized by cartilage destruction, chronic inflammation, and local pain. Evidence showed that retinoic acid receptor-related orphan receptor-α (RORα) is crucial in cartilage development and OA pathogenesis. Here, we investigated the role and molecular mechanism of RORα, an important member of the nuclear receptor family, in regulating the development of OA pathologic features. Investigation into clinical cartilage specimens showed that RORα expression level is positively correlated with the severity of OA and cartilage damage. In an in vivo OA model induced by anterior crucial ligament transaction, intra-articular injection of si-Rora adenovirus reversed the cartilage damage. The expression of cartilage matrix components type II collagen and aggrecan were elevated upon RORα blockade. RNA-seq data suggested that the IL-6/STAT3 pathway is significantly downregulated, manifesting the reduced expression level of both IL-6 and phosphorylated STAT3. RORα exerted its effect on IL-6/STAT3 signaling in two different ways, including interaction with STAT3 and IL-6 promoter. Taken together, our findings indicated the pivotal role of the RORα/IL-6/STAT3 axis in OA progression and confirmed that RORα blockade improved the matrix catabolism in OA chondrocytes. These results may provide a potential treatment target in OA therapy.

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Osteoarthritis RNA Sequencing from ground cartilage samples

Project description:Osteoarthritis (OA) is the most prevalent joint disease with the typifying feature being the progressive degradation of articular cartilage during disease progression. In this study we used whole transcriptome RNA-seq as a tool to compare gene expression changes between age-matched osteoarthritic human hip OA cartilage (n=10) compared to control (neck of femur fracture) cartilage (n=6) [GSE107308]. All cartilage was from patients undergoing acetabulofemoral joint replacement. Cartilage RNA was isolated from cartilage within 2 hr of joint replacement surgery, mRNA was polyA purified and transcript expression was analysed using 78-base paired-end sequencing generating on average 28 million reads/sample sequencing. The data shows excellent correlation with our previous microarray data but identifies significantly more differentially expressed transcripts plus novel transcript variants, several of which have been validated by real-time qPCR. Our work sheds further light on chondrocyte transcriptome expression and highlights gene expression changes and novel transcripts potentially important in osteoarthritis progression

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