title: The association of genes involved in the angiogenesis-associated signaling pathway with risk of anterior cruciate ligament rupture.
abstract: Angiogenesis-associated signaling is a fundamental component in the remodeling of the extracellular matrix in response to loading. Genes encoding protein components within this signaling cascade are therefore suitable candidates for investigation into ACL injury susceptibility: namely, vascular endothelial growth factor A isoform (VEGFA), kinase insert-domain receptor (KDR), nerve growth factor (NGF), and hypoxia inducible factor-1α (HIF1A). A case-control genetic association study was conducted on 227 asymptomatic control participants and 227 participants with surgically diagnosed ACL ruptures of which 126 participants reported a non-contact mechanism of rupture. All participants were genotyped for seven polymorphisms within the four genes. The VEGFA rs699947 CC genotype (p=0.010, OR: 1.92, 95% CI: 1.17-3.17) was significantly over-represented within participants with non-contact ACL ruptures. The VEGFA rs1570360 GA genotype was significantly over-represented in the CON group (p=0.007, OR: 1.70, 95% CI: 1.16-2.50). Furthermore, the KDR rs2071559 GA genotype was significantly over-represented in the female controls (p=0.023, OR: 2.16, 95% CI: 1.11-4.22). Inferred haplotype analyses also implicated genomic regions spanning the VEGFA and KDR genes. These novel findings suggest that regions within VEGFA and KDR may be implicated in the pathophysiology of ACL ruptures; highlighting the potential biological significance of angiogenesis-associated signaling in the aetiology of ACL ruptures.
authors.affiliation: UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
authors.forename: Masouda
authors.initials: M
authors.lastname: Rahim
authors.forename: Andrea
authors.initials: A
authors.lastname: Gibbon
authors.forename: Hayden
authors.initials: H
authors.lastname: Hobbs
authors.forename: Willem
authors.initials: W
authors.lastname: van der Merwe
authors.forename: Michael
authors.initials: M
authors.lastname: Posthumus
authors.forename: Malcolm
authors.initials: M
authors.lastname: Collins
authors.forename: Alison V
authors.initials: AV
authors.lastname: September
mesh_terms: D000070598:Anterior Cruciate Ligament Injuries; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D056726:Genetic Association Studies; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D008297:Male; D012306:Risk; D012421:Rupture; D015398:Signal Transduction; D042461:Vascular Endothelial Growth Factor A / Q000235:genetics*; D040301:Vascular Endothelial Growth Factor Receptor-2 / Q000235:genetics*
chemical_list: D042461:Vascular Endothelial Growth Factor A; D040301:Vascular Endothelial Growth Factor Receptor-2
keywords: ACL rupture risk; hypoxia inducible factor-1α; kinase insert-domain receptor; nerve growth factor; vascular endothelial growth factor