The Contribution of the DLG5 113A Variant in Early-Onset Inflammatory Bowel Disease

Objective To assess the contribution of the 113 G→A missense mutation within the discs, large homolog 5 (DLG5) gene in childhood-onset inflammatory bowel disease (IBD) in Scotland. Study design Two-hundred and ninety-six children with IBD were studied. Parental DNA was also collected for transmission disequilibrium testing (TDT) analysis. Genotyping was performed by TaqMan®. Genotype-phenotype analysis was also undertaken. Socioeconomic status was assigned using a deprivation category (DepCat) score 1 through 7 (1 = most affluent). Results TDT analysis demonstrated a significant association with IBD ( P = .045). On unifactorial analysis, 113A carriage was associated with: (1) higher social class (DepCat 1 compared with 2-7, and 1-2 compared with 3-7) (66.7% vs 22.6%, P = .0005, OR 6.84 [1.99-23.55] and 37.2% vs 22.2%, P = .03, OR 2.08 [1.04-4.17], respectively); (2) higher height centile (>75th centile vs