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Experimental study on the role and biomarker potential of CX3CR1 in osteoarthritis
Junpu Huang1, Xifan Zheng1, Jinzhi Meng1
1Bone and Joint Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.
Background:
Osteoarthritis (OA) is a chronic joint disorder marked by progressive degeneration of articular cartilage and the formation of secondary osteophytes. Despite extensive research, the underlying molecular mechanisms remain poorly understood. This study aimed to identify OA-associated genes and elucidate the molecular pathways implicated, with the goal of discovering reliable diagnostic biomarkers.
Methods:
The microarray dataset was retrieved from the Gene Expression Omnibus (GEO) and analyzed using R software to identify the signature gene, CX3CR1. Differentially expressed genes (DEGs) correlated with CX3CR1 were subsequently subjected to Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and immune infiltration analyses. A ceRNA regulatory network was also constructed. Vali-dation of CX3CR1 expression was conducted through qRT-PCR, Western blotting, and immunohistochemistry.
Results:
CX3CR1 emerged as a candidate gene significantly associated with OA, exhibiting regulatory roles primarily in lipid metabolism-related and extra-cellular matrix-related biological processes and signaling cascades. The infiltration levels of immune cells, particularly activated mast cells, appeared to modulate OA progression. Both in vitro and in vivo experiments demonstrated elevated CX3CR1 expression in OA tissues relative to controls, with a robust positive correlation observed between CX3CR1 and MMP13 levels.
Conclusion:
CX3CR1 represents a potential biomarker for OA diagnosis and therapeutic targeting, exerting its effects by modulating lipid metabolism, extracellular matrix dynamics, and immune cell infiltration.
Insights
Osteoarthritis (OA) diagnosis may be improved by the gene CX3CR1, which is linked to lipid metabolism, extracellular matrix changes, and immune cell activity in joint tissues. This finding offers potential for new OA diagnostic biomarkers.
Area of Science:
- Biochemistry
- Immunology
- Genetics
Background:
- Osteoarthritis (OA) is a degenerative joint disease with poorly understood molecular drivers.
- Current research seeks to identify key genes and pathways for developing diagnostic biomarkers.
- Understanding OA pathogenesis is crucial for effective treatment strategies.
Purpose of the Study:
- To identify genes associated with osteoarthritis (OA).
- To elucidate molecular pathways involved in OA pathogenesis.
- To discover potential diagnostic biomarkers for OA.
Main Methods:
- Analysis of Gene Expression Omnibus (GEO) microarray data using R software.
- Identification of CX3CR1 as a signature gene and analysis of correlated differentially expressed genes (DEGs).
- Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), immune infiltration, and ceRNA network analyses; validation via qRT-PCR, Western blotting, and immunohistochemistry.
Main Results:
- CX3CR1 was identified as a key gene significantly associated with OA.
- CX3CR1 plays regulatory roles in lipid metabolism and extracellular matrix processes.
- Activated mast cell infiltration was linked to OA progression, and CX3CR1 expression correlated positively with MMP13.
Conclusions:
- CX3CR1 shows promise as a biomarker for OA diagnosis and therapeutic intervention.
- CX3CR1 influences OA through modulation of lipid metabolism, extracellular matrix, and immune cell infiltration.
- Further research into CX3CR1 could lead to novel OA treatment strategies.
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