A genome-wide association study for shoulder impingement and rotator cuff disease

Area of Science:

• Genetics
• Orthopedics
• Molecular Biology

Background:

• Rotator cuff disease is a significant orthopedic condition.
• Identifying genetic factors can elucidate disease mechanisms and inform personalized medicine.

Purpose of the Study:

• To identify genetic variants associated with rotator cuff disease.
• To perform a genome-wide association study (GWAS) for shoulder impingement.
• To combine GWAS data with prior rotator cuff tear GWAS for meta-analysis.

Main Methods:

• Genome-wide association study (GWAS) on UK Biobank data for shoulder impingement (3864 cases).
• Meta-analysis combining shoulder impingement GWAS with prior rotator cuff tear GWAS.
• RNA sequencing of rotator cuff tendon biopsies to examine gene expression changes.

Main Results:

• Identified 4 new loci for shoulder impingement and 7 additional loci via meta-analysis, totaling 11 loci.
• Many identified loci have known biological functions relevant to disease.
• RNA sequencing revealed altered expression of STK24, SAT1, and UBE2D3 following rotator cuff tearing.

Conclusions:

• This study presents the first GWAS for shoulder impingement, identifying 11 associated genetic loci.
• The identified loci suggest plausible biological mechanisms for rotator cuff disease etiology.
• Risk alleles can be used for patient-specific risk assessment and personalized interventions.