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- W2059571856 abstract "Functional studies support the involvement of the MDR1 gene in the pathways leading to Crohn's disease (CD). Two common single nucleotide polymorphisms (SNPs), C3435T and G2677T/A, thought to alter the function of the corresponding P-glycoprotein, have shown inconsistent associations with CD. We investigated whether DNA variants in the MDR1 gene were associated with susceptibility for CD and specific phenotypes in children.A case-control study was conducted at 3 gastroenterology clinics across Canada. Children with CD and population- or hospital-based controls were included. CD cases were classified using the Montreal Classification. Thirteen tag-SNPs and the C3435T variant in the MDR1 gene were genotyped. Single-SNP allelic, genotype as well as gene-wide haplotype associations with CD and its phenotypes at diagnosis were assessed.A total of 270 CD cases and 336 controls were studied. Most cases were male (56.3%), had disease location L3+/-L4 (58.1%), and an inflammatory phenotype B1+/-p (88.5%). Allelic association analysis revealed that SNP rs17327442 was significantly associated with overall susceptibility to CD (odds ratio [OR] = 0.72, 95% confidence interval [CI] = 0.50-0.99, P = 0.04) but this association did not withstand corrections for multiple testing (q-value = 0.56). Genotype-phenotype analysis indicated that 2 SNPs (rs10248420, P = 0.007, q-value = 0.07; rs2032583, P = 0.01, q-value = 0.07) were significantly associated with colonic disease. Five SNPs, rs1128503 (P = 0.02), rs1202184 (P = 0.008), rs1202186 (P = 0.02), rs2091766 (P = 0.03), and rs2235046 (P = 0.03) were nominally associated with noninflammatory CD. Specific haplotypes comprising of the tag-SNPs were significantly associated with either colonic or noninflammatory CD.Our comprehensive gene-wide analysis suggests that the MDR1 gene may be associated with clinical phenotypes of CD in children." @default.
- W2059571856 created "2016-06-24" @default.
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- W2059571856 date "2009-06-01" @default.
- W2059571856 modified "2023-10-16" @default.
- W2059571856 title "Associations between ABCB1/MDR1 gene polymorphisms and Crohnʼs disease: A gene-wide study in a pediatric population" @default.
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- W2059571856 doi "https://doi.org/10.1002/ibd.20849" @default.
- W2059571856 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19107781" @default.
- W2059571856 hasPublicationYear "2009" @default.
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