Evaluating whole-genome expression differences in idiopathic and diabetic adhesive capsulitis

Area of Science:

• Orthopedics
• Genomics
• Endocrinology

Background:

• Diabetic patients experience higher rates and longer durations of adhesive capsulitis (AC) compared to those without diabetes.
• Understanding the molecular differences is crucial for targeted treatment strategies.

Purpose of the Study:

• To compare gene expression profiles between adhesive capsulitis (AC) in diabetic patients and AC in non-diabetic patients.
• To identify distinct molecular pathways involved in diabetic AC versus idiopathic AC.

Main Methods:

• Whole-transcriptome RNA sequencing was performed on shoulder capsule samples from 16 patients (8 diabetic AC, 8 non-diabetic AC).
• Samples were compared against control groups with and without diabetes.
• Differential gene expression analysis was conducted using EdgeR, with a false discovery rate < 5%.

Main Results:

• Significant differences in gene expression were observed between diabetic and non-diabetic AC patients (66 differentially expressed genes).
• Idiopathic AC showed enrichment in structural/muscle pathways, while diabetic AC highlighted hormonal/inflammatory signaling pathways.
• Diabetic AC had 61 differentially expressed genes, contrasting with 286 in idiopathic AC.

Conclusions:

• Gene expression profiles reveal fundamentally different pathophysiology between diabetic and idiopathic AC, indicating distinct clinical entities.
• Identified genes suggest novel therapeutic targets and distinct treatment approaches for diabetic AC.