Germline genomic variants associated with childhood acute lymphoblastic leukemia.
Treviño LR, Yang W, French D et al.
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Abstract
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Using the Affymetrix 500K Mapping array and publicly available genotypes, we identified 18 SNPs whose allele frequency differed significantly(P < 1 x 10(-5)) between pediatric acute lymphoblastic leukemia (ALL) cases (n = 317) and non-ALL controls (n = 17,958). Two SNPs in ARID5B not only differed between ALL and non-ALL groups (rs10821936, P = 1.4 x 10(-15), odds ratio (OR) = 1.91; rs10994982, P = 5.7 x 10(-9), OR = 1.62) but also distinguished B-hyperdiploid ALL from other subtypes (rs10821936, P = 1.62 x 10(-5), OR = 2.17; rs10994982, P = 0.003, OR 1.72). These ARID5B SNPs also distinguished B-hyperdiploid ALL from other subtypes in an independent validation cohort (n = 124 children with ALL; P = 0.003 and P = 0.0008, OR 2.45 and 2.86, respectively) and were associated with methotrexate accumulation and gene expression pattern in leukemic lymphoblasts. We conclude that germline variants affect susceptibility to, and characteristics of, specific ALL subtypes.
317 European ancestry cases, 17,958 European ancestry controls
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