RNA-Seq Reveals the mRNAs, miRNAs, and lncRNAs Expression Profile of Knee Joint Synovial Tissue in Osteoarthritis...

Area of Science:

• Molecular biology
• Genomics
• Rheumatology

Background:

• Osteoarthritis (OA) is a prevalent degenerative joint disease in the elderly, causing significant health and economic burdens.
• Current treatments like total joint replacement do not halt cartilage degeneration, and the molecular mechanisms, particularly inflammation's role, remain unclear.

Purpose of the Study:

• To investigate the molecular mechanisms of osteoarthritis (OA) by analyzing gene and non-coding RNA expression in synovial tissues.
• To identify differentially expressed genes (DEGs) and key pathways involved in OA pathogenesis, focusing on inflammation.

Main Methods:

• RNA sequencing (RNA-seq) was performed on knee joint synovial tissue samples from OA patients and controls.
• Analysis included identification of differentially expressed mRNAs, lncRNAs, and miRNAs, prediction of lncRNA-mRNA interactions, and screening of overlapping miRNAs.
• Pathway enrichment and functional annotation were conducted to identify key biological processes.

Main Results:

• Significant upregulation and downregulation of numerous mRNAs, lncRNAs, and miRNAs were observed in OA samples compared to controls.
• Key inflammation-related transcripts including CHST11, TREM1, IL-1β, IL-8, miR-146a-5p, and lncRNA GAS5 were identified as differentially expressed.
• Specific genes like TREM1, LIF, miR146-5a, and GAS5 were highlighted as potentially crucial in OA development and regulation.

Conclusions:

• This study identified inflammation-related differentially expressed genes and non-coding RNAs in OA synovial tissues.
• The findings suggest that competing endogenous RNA networks play a role in the pathogenesis of osteoarthritis.
• The identified genes and pathways, such as TREM1, LIF, miR146-5a, and GAS5, represent potential novel therapeutic targets for OA treatment.