Abstract
Dozens of loci associated with fracture have been identified by genome-wide association studies (GWASs). However, most of these variants are located in the noncoding regions including introns, long terminal repeats, and intergenic regions. Although combining regulation information helps to identify the causal SNPs and interpret the involvement of these variants in the etiology of human fracture, regulation information which was truly associated with fracture was unknown. A novel functional enrichment method GARFIELD (GWAS Analysis of Regulatory of Functional Information Enrichment with LD correction) was applied to identify fracture-associated regulation information, including transcript factor binding sites, expression quantitative trait loci (eQTLs), chromatin states, enhancer, promoter, dyadic, super enhancer and Epigenome marks. Fracture SNPs were significantly enriched in exon (Bonferroni correction, p value < 7.14 × 10–3) at two GWAS p value thresholds through GARFIELD. High level of fold-enrichment was observed in super enhancer of monocyte and the enhancer of chondrocyte (Bonferroni correction, p value < 4.45 × 10–3). eQTLs of 44 tissues/cells and 10 transcription factors (TFs) were identified to be associated with human fracture. These results provide new insight into the etiology of human fracture, which might increase the identification of the causal SNPs through the fine-mapping study combined with functional annotation, as well as polygenic risk score.
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We thank all the study subjects for volunteering to participate in the study.
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This study was partially supported by the Health Commission of Hunan Province (202205033867), Natural Science Foundation of Hunan Province (S2022JJMSXM3534), Natural Science Foundation of Changsha (kq2208475), and Changsha Science and Technology Bureau (kq1701016).
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XHM: calculation, manuscript writing. ZL, XDC: manuscript revision. AMD, ZHM: study conception and design, manuscript revision.
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Xiang-He Meng, Zhen Liu, Xiang-Ding Chen, Ai-Min Deng, Zeng-Hui Mao have no conflict of interest to disclose.
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Meng, XH., Liu, Z., Chen, XD. et al. Functional Enrichment Analysis Identifying Regulatory Information Associated with Human Fracture. Calcif Tissue Int 113, 286–294 (2023). https://doi.org/10.1007/s00223-023-01108-w
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DOI: https://doi.org/10.1007/s00223-023-01108-w