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Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint
Published on: July 22, 2021
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Identification of hub genes through integrated single-cell and microarray transcriptome analysis in osteoarthritic
Yanzhu Shen1,2, Ruichen Jiang3,2, Yanjun Huang1,2
1China-Japan Friendship Hospital (Institute of Clinical Medical Sciences), Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730 , China.
Journal of Orthopaedic Surgery and Research
|October 23, 2024
Summary
Osteoarthritis (OA) meniscus deterioration involves altered immune cells and key gene expression changes. This study identifies crucial genes and regulatory patterns, offering potential therapeutic targets for OA.
Area of Science:
- Biomedical research
- Molecular biology
- Genomics
Background:
- Osteoarthritis (OA) is characterized by progressive joint cartilage and bone degradation.
- Molecular mechanisms of meniscus deterioration in OA, particularly at the single-cell level, are not well understood.
Purpose of the Study:
- To investigate the molecular mechanisms and cellular changes in the meniscus during osteoarthritis.
- To identify key genes, regulatory networks, and potential therapeutic targets for OA.
Main Methods:
- Analysis of two independent meniscus sequencing datasets (GSE220243, GSE98918) from OA and non-OA patients.
- Single-cell RNA sequencing processing using Seurat, differential gene expression analysis, and immune cell infiltration assessment (MCP, CIBERSORT).
- Bioinformatic analyses including GO, KEGG, protein-protein interaction networks, transcription factor/miRNA network analysis, and drug target prediction.
Main Results:
- Single-cell analysis revealed increased macrophages and decreased cytotoxic lymphocytes and endothelial cells in the OA meniscus.
- Identification of significantly decreased genes (COL1A1, COL3A1, COL5A2, COL6A3, LOX, VEGFA) in OA, with specific upregulation of COL3A1, COL5A2, LOX, and VEGFA in meniscal chondrocytes.
- Construction of gene-regulatory networks identified key transcription factors, miRNAs, and ten potential drug molecules.
Conclusions:
- This study elucidates critical genes and their distinct regulatory patterns in OA meniscus chondrocytes versus non-chondrocytes.
- The findings contribute to understanding OA pathogenesis and provide a foundation for developing novel therapeutic strategies targeting specific genes and pathways.
