Deep integrative analysis of microRNA-mRNA regulatory networks for biomarker and target discovery in chondrosarcoma

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Chondrosarcoma (CHS) is a prevalent bone malignancy with increasing incidence in older individuals.
• MicroRNAs (miRNAs) are crucial noncoding RNAs regulating biological processes and disease, but their role in CHS is not well understood.

Purpose of the Study:

• To investigate the expression profiles and regulatory networks of miRNAs and messenger RNAs (mRNAs) in chondrosarcoma.
• To identify key miRNAs and their mRNA targets involved in CHS pathogenesis.

Main Methods:

• Integrative analysis of miRNA and mRNA expression profiles using RNA-sequencing (RNA-seq) on human CHS tissues and cell lines.
• Screening of miRNA-mRNA regulatory interactions via Pearson correlation analysis and target prediction.
• Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis.

Main Results:

• Identified 133 differentially expressed miRNAs and 796 differentially expressed mRNAs.
• Established a regulatory network involving 55 miRNAs and 242 mRNAs.
• Highlighted potential key regulatory miRNAs (hub-miRNAs) including miR-622, miR-4539, miR-145, miR-25, and miR-96.
• Functional experiments confirmed miR-622 targets BMP1 and regulates CHS cell proliferation.

Conclusions:

• This study elucidates the miRNA and mRNA expression landscape in chondrosarcoma.
• Identified specific miRNAs, notably miR-622, as critical regulators in CHS pathogenesis.
• The findings provide novel insights into molecular mechanisms underlying CHS and suggest potential therapeutic targets.