Integrated Multiomics Analysis Identifies CDO1 as a Novel Therapeutic Target for Osteoarthritis

Area of Science:

• Genomics
• Molecular Biology
• Biomedical Research

Background:

• Osteoarthritis (OA) is a degenerative joint disease with complex genetic underpinnings.
• Identifying key genes and therapeutic targets is crucial for developing effective OA treatments.

Purpose of the Study:

• To identify novel genes and potential therapeutic targets for osteoarthritis (OA) progression.
• To investigate the causal role of candidate genes in OA development using an integrated multi-omics approach.

Main Methods:

• Integrated analysis of single-cell RNA sequencing (scRNA-seq) and bulk RNA-seq data.
• Weighted Gene Co-expression Network Analysis (WGCNA) to identify co-expressed gene modules.
• Mendelian randomization (MR) analysis to assess causal relationships between genes and OA risk.
• Functional validation of the top candidate gene (CDO1) in a rat OA model.

Main Results:

• Identification of 11 cell types and thousands of differentially expressed genes (DEGs) via scRNA-seq and bulk RNA-seq.
• WGCNA highlighted a key OA-associated gene module.
• Integrated analysis pinpointed 932 overlapping DEGs, implicating pathways like ferroptosis and PI3K-Akt signaling.
• MR analysis identified CDO1 as a significant causal risk gene for OA.

Conclusions:

• CDO1 is a novel risk gene for osteoarthritis.
• CDO1 inhibition demonstrated a protective effect against OA progression in vivo.
• CDO1 represents a promising therapeutic target for osteoarthritis.