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Updated: Feb 8, 2026

Synovial Fluid Analysis to Identify Osteoarthritis
Published on: October 20, 2022
Global transcriptome analysis to identify critical genes involved in the pathology of osteoarthritis
Objectives:
The aim of this study was to identify key pathological genes in osteoarthritis (OA).
Methods:
We searched and downloaded mRNA expression data from the Gene Expression Omnibus database to identify differentially expressed genes (DEGs) of joint synovial tissues from OA and normal individuals. Gene Ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathway analyses were used to assess the function of identified DEGs. The protein-protein interaction (PPI) network and transcriptional factors (TFs) regulatory network were used to further explore the function of identified DEGs. The quantitative real-time polymerase chain reaction (qRT-PCR) was applied to validate the result of bioinformatics analysis. Electronic validation was performed to verify the expression of selected DEGs. The diagnosis value of identified DEGs was accessed by receiver operating characteristic (ROC) analysis.
Results:
A total of 1085 DEGs were identified. KEGG pathway analysis displayed that Wnt was a significantly enriched signalling pathway. Some hub genes with high interactions such as USP46, CPVL, FKBP5, FOSL2, GADD45B, PTGS1, and ZNF423 were identified in the PPI and TFs network. The results of qRT-PCR showed that GADD45B, ADAMTS1, and TFAM were down-regulated in joint synovial tissues of OA, which was consistent with the bioinformatics analysis. The expression levels of USP46, CPVL, FOSL2, and PTGS1 in electronic validation were compatible with the bio-informatics result. CPVL and TFAM had a potential diagnostic value for OA based on the ROC analysis.
Conclusion:
The deregulated genes including USP46, CPVL, FKBP5, FOSL2, GADD45B, PTGS1, ZNF423, ADAMTS1, and TFAM might be involved in the pathology of OA.Cite this article: X. Zhang, Y. Bu, B. Zhu, Q. Zhao, Z. Lv, B. Li, J. Liu. Global transcriptome analysis to identify critical genes involved in the pathology of osteoarthritis. Bone Joint Res 2018;7:298-307. DOI: 10.1302/2046-3758.74.BJR-2017-0245.R1.
Insights
This study identified key genes like CPVL and TFAM involved in osteoarthritis (OA) pathology. These genes show potential for diagnosing OA, offering new insights into the disease.
Area of Science:
- Genomics
- Molecular Biology
- Bioinformatics
Background:
- Osteoarthritis (OA) is a degenerative joint disease with complex genetic underpinnings.
- Identifying key pathological genes is crucial for understanding OA mechanisms and developing targeted therapies.
Purpose of the Study:
- To identify critical differentially expressed genes (DEGs) in osteoarthritis synovial tissues.
- To explore the functional roles and potential diagnostic value of these DEGs.
Main Methods:
- Downloaded and analyzed mRNA expression data from the Gene Expression Omnibus (GEO) database.
- Utilized Gene Ontology (GO), Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathway, and protein-protein interaction (PPI) network analyses.
- Validated findings using quantitative real-time polymerase chain reaction (qRT-PCR), electronic validation, and receiver operating characteristic (ROC) analysis.
Main Results:
- Identified 1085 differentially expressed genes (DEGs) between OA and normal synovial tissues.
- Wnt signaling pathway was significantly enriched.
- Hub genes including USP46, CPVL, FKBP5, FOSL2, GADD45B, PTGS1, and ZNF423 were identified.
- GADD45B, ADAMTS1, and TFAM were found to be down-regulated in OA.
- CPVL and TFAM demonstrated potential diagnostic value for OA.
Conclusions:
- Several deregulated genes, including USP46, CPVL, FKBP5, FOSL2, GADD45B, PTGS1, ZNF423, ADAMTS1, and TFAM, are implicated in osteoarthritis pathology.
- CPVL and TFAM show promise as diagnostic biomarkers for OA.
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