Genomic Expression Profiling and Bioinformatics Analysis of Chronic Recurrent Multifocal Osteomyelitis

Area of Science:

• Genomics
• Immunology
• Molecular Biology

Background:

• Chronic nonbacterial osteomyelitis (CNO) is an autoinflammatory bone disorder, with chronic recurrent multifocal osteomyelitis (CRMO) being its most severe form.
• The precise molecular mechanisms underlying CNO/CRMO pathogenesis remain largely unknown.
• Current diagnostic and treatment strategies for CNO/CRMO lack standardization.

Purpose of the Study:

• To identify differentially expressed genes (DEGs) in CRMO tissues compared to normal controls.
• To elucidate the molecular pathophysiology of CRMO.
• To uncover potential diagnostic and therapeutic targets for CRMO.

Main Methods:

• Microarray data analysis of CRMO and normal tissue samples from the GSE133378 dataset.
• Identification of DEGs using the limma package in R.
• Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses, alongside protein-protein interaction (PPI) network analysis.

Main Results:

• A total of 1299 differentially expressed mRNAs were identified, with 1177 upregulated and 122 downregulated genes.
• GO analyses revealed enrichment in immune-related terms.
• KEGG pathway analyses highlighted associations with oxidative phosphorylation, ribosome, and Parkinson disease pathways. Immune and ribosomal gene modules were identified.

Conclusions:

• Oxidative phosphorylation, ribosome, and Parkinson disease pathways are significantly associated with CRMO.
• Immune-related genes (e.g., IRF5, OAS3, HLA-A) and ribosomal genes may play a role in CRMO pathogenesis.
• Identified genes offer potential for developing early diagnostic tools, prognostic markers, or therapeutic strategies for CRMO.