Prioritization of Candidate miRNA Regulators Targeting Fibrotic-Immune Remodeling in Ligamentum Flavum Hypertrophy:...

Area of Science:

• Biomedical Science
• Molecular Biology
• Genomics

Background:

• Ligamentum flavum hypertrophy (LFH) contributes significantly to lumbar spinal stenosis.
• LFH involves extracellular matrix (ECM) remodeling and immune components.
• The regulatory role of microRNAs (miRNAs) in LFH transcriptomic changes is not fully understood.

Purpose of the Study:

• To investigate the regulatory architecture linking miRNA dysregulation to LFH transcriptomic remodeling.
• To identify key miRNAs and pathways involved in the fibrotic and immune processes of LFH.
• To prioritize candidate miRNAs for further experimental validation.

Main Methods:

• Integrated analysis of public Gene Expression Omnibus datasets (mRNA and miRNA).
• Single-cell and bulk RNA sequencing to characterize cellular landscape and identify differentially expressed genes.
• Bioinformatic analyses including functional enrichment, protein-protein interaction networks, and miRNA-target prediction.

Main Results:

• Single-cell analysis revealed fibroblast, myofibroblast, and ECM remodeling in LFH.
• Integration of mRNA and miRNA data identified 651 inverse-regulated core genes.
• Enrichment analyses highlighted ECM organization, proteoglycan/glycosaminoglycan biology, and immune/NF-κB/Wnt pathways.
• Top candidate miRNAs including hsa-miR-708-5p were prioritized.

Conclusions:

• An integrated transcriptomic approach delineated a fibrotic-immune remodeling landscape in LFH.
• Candidate miRNAs linked to central regulatory pathways were identified for LFH.
• This study provides a foundation for understanding LFH pathogenesis and developing targeted therapies.