Differentially Expressed Salivary miRNAs in Temporomandibular Disorders

Area of Science:

• Biochemistry
• Genomics
• Molecular Biology

Background:

• Temporomandibular disorders (TMDs) present complex etiologies, hindering effective diagnosis and treatment.
• Understanding the molecular pathogenesis of TMDs is crucial for developing targeted therapies.

Purpose of the Study:

• To identify salivary microRNA (miRNA) signatures associated with TMDs.
• To explore the potential of salivary miRNAs as diagnostic and prognostic biomarkers for TMDs.

Main Methods:

• Collected saliva samples from 9 adult female TMD patients and 8 healthy controls.
• Performed small RNA sequencing and differential expression analysis using DESeq2.
• Utilized miEAA 2.1 for functional enrichment analysis of differentially expressed miRNAs.

Main Results:

• Identified 187 significantly differentially expressed salivary miRNAs between TMD and control groups.
• Found miRNAs associated with cadherin-mediated cell-cell adhesion, neurogenesis, and chemokine production.
• Observed strong correlations between 5 specific miRNAs and TMD pain intensity/chronic pain grade.

Conclusions:

• Salivary miRNA profiling shows promise as a non-invasive diagnostic tool for TMDs.
• Potential to reveal molecular endotypes and disease mechanisms not apparent clinically.
• Further research with larger cohorts is necessary to validate findings and assess clinical utility.