Integrating transcriptome-wide association study and mRNA expression profiling identifies novel genes associated with...

Area of Science:

• Genetics
• Bone Biology
• Metabolic Diseases

Background:

• Osteoporosis (OP) is a metabolic bone disease characterized by decreased bone mineral density (BMD).
• Identifying novel genetic factors associated with BMD is crucial for understanding OP pathogenesis.

Purpose of the Study:

• To identify novel candidate genes associated with bone mineral density (BMD).
• To explore the genetic mechanisms underlying osteoporosis (OP).

Main Methods:

• A two-stage transcriptome-wide association study (TWAS) was conducted using genome-wide association study (GWAS) summary data for BMD.
• TWAS results were integrated with mRNA expression weights from peripheral blood and muscle/skeleton.
• Gene ontology (GO) analysis and comparison with gene expression profiling data were performed to identify overlapping genes and pathways.

Main Results:

• The TWAS identified 95 common genes associated with BMD in peripheral blood and muscle/skeleton.
• Eighteen overlapping genes were found between TWAS and mRNA expression profiling of OP patients, including MUL1 and SPTBN1.
• Twelve BMD-associated Gene Ontology (GO) terms were identified, with six overlapping terms (e.g., membrane, cell adhesion) found between TWAS and expression profiles.

Conclusions:

• The study successfully identified multiple candidate genes and GO terms associated with BMD.
• These findings provide novel genetic insights into the mechanisms of osteoporosis.
• The identified genes and pathways warrant further investigation for potential therapeutic targets.