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Relationship of Common Variants in VEGFA Gene with Osteonecrosis of the Femoral Head: A Han Chinese Population Based Association Study

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Journal Sci Rep
Specialty Science
Date 2018 Nov 3
PMID 30385772
Citations 9
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Abstract

The pathology of non-traumatic osteonecrosis of the femoral head (ONFH) is complex. Several studies have linked some polymorphisms of vascular endothelial growth factors A (VEGFA) with ONFH, but the results are not consistent and are even conflicting. In the study, 22 single nucleotide polymorphisms (SNPs) in VEGFA were genotyped in 1,762 subjects (489 cases and 1,273 controls). Genetic association analyses were performed in single markers and haplotype levels. Stratification analysis was conducted for ONFH patients. Gene by environment interactions were tested between VEGFA and the smoking status of the subjects. Gene expression and eQTL data of significant SNPs were extracted from GTEx to examine their potential biological function. The SNP, rs2010963, was identified to be significantly associated with ONFH (χ = 11.66, P = 0.0006, OR = 1.29). Haplotypes including rs2010963 were also identified to be correlated with ONFH in the haplotype-based analyses. After stratifying by the causes of ONFH, a significant signal from rs2010963 could only be identified in alcohol-induced patients (P = 0.0009) but not in steroid-induced patients (P = 0.055). No significant results were obtained from the gene by environmental interaction analyses. Significant expression differences of VEGFA were identified in multiple human tissues for different genotypes of rs2010963. Our findings indicate that SNP rs2010963 is significantly associated with ONFH.

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