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Published on: March 12, 2021
Genetic variants associated with rotator cuff tearing utilizing multiple population-based genetic resources
Robert Z Tashjian1, Stuart K Kim2, Megan D Roche3
1Department of Orthopaedics, University of Utah School of Medicine, Salt Lake City, UT, USA.
This study identified novel genetic variants in ZNF804A, GLCCI1, and THSD7A associated with rotator cuff tearing. Gene expression analysis revealed THSD7A downregulation and upregulation of TIMP2, Col5A1, TGFBR1, and TNC in rotator cuff tears.
Area of Science:
- Genetics
- Orthopedics
- Molecular Biology
Background:
- Rotator cuff tearing is a complex condition with potential genetic factors.
- Understanding genetic predispositions can aid in identifying at-risk individuals.
Purpose of the Study:
- To identify genetic variants associated with rotator cuff tearing using the UK Biobank (UKB) cohort.
- To confirm identified variants in an independent genetic database.
- To evaluate the tissue expression of associated genes in rotator cuff tears.
Main Methods:
- Genome-wide association study (GWAS) on 5701 rotator cuff injury cases from UKB.
- RNA sequencing of rotator cuff biopsies from 24 patients with tears and 9 controls.
- Differential gene expression analysis for genes with associated variants.
Main Results:
- GWAS identified 3 novel significant loci: GLCCI1 (rs4725069), THSD7A (rs575224171), and ZNF804A (rs775583810).
- GLCCI1 SNP association confirmed in an independent cohort.
- Three previously reported SNPs in TNC were validated.
- THSD7A was downregulated, while TIMP2, Col5A1, TGFBR1, and TNC were upregulated in rotator cuff tears.
Conclusions:
- Novel genetic loci (ZNF804A, GLCCI1, THSD7A) associated with rotator cuff tearing were identified.
- Downregulation of THSD7A suggests a functional role in rotator cuff tears.
- Validation of TNC SNPs and upregulation of TIMP2, Col5A1, TGFBR1, and TNC support their involvement in the tearing process.
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