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Aim To elucidate the genetic architecture of haemorrhoids and identify genes and biological pathways central to their pathobiology. Method We report the first ever genome-wide association study of haemorrhoids in 31,652 cases and 369,931 controls from UK Biobank. Genes and biological pathways were prioritised using several bioinformatic approaches, and potential therapeutic targets were identified in the Open Targets Platform. A weighted genetic risk score (wGRS) for haemorrhoids was constructed to compare genetic susceptibility in surgical vs non-surgical haemorrhoids patients. Results Twelve novel genome-wide significant susceptibility loci were discovered to be associated with haemorrhoids. Seventeen genes were mapped to these loci, and gene sets in biological pathways relating to extracellular matrix regulation and TGF-β signalling were strongly implicated. Seven gene-products (41.2%) were predicted tractable to antibody and/or small molecule targeting, and three products (17.6%) have known pharmaceutical interactions (ACHE, ADRA2B, ELN). The wGRS analysis demonstrated that haemorrhoid patients requiring surgery have a higher inherent genetic susceptibility than those managed non-surgically (P = 4.58 × 10-27). Conclusions This study has advanced our understanding of haemorrhoids pathobiology with the identification of several biologically plausible genes and pathways, many of which demonstrate strong therapeutic potential. The wGRS correlated with disease severity, representing a first step in personalised medicine approaches to haemorrhoids.

1540 Genome-Wide Association Analysis In 401,583 Individuals Identifies Novel Therapeutic Targets for Haemorrhoids