A noncoding single-nucleotide polymorphism at 8q24 drives IDH1-mutant glioma formation
Article A noncoding single-nucleotide polymorphism at 8q24 drives IDH1-mutant glioma formation
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Establishing causal links between inherited polymorphisms and cancer risk is challenging. Here, we focus on the single-nucleotide polymorphism rs55705857, which confers a sixfold greater risk of isocitrate dehydrogenase ((IDH)-mutant low-grade glioma (LGG). We reveal that rs55705857 itself is the causal variant and is associated with molecular pathways that drive LGG. Mechanistically, we show that rs55705857 resides within a brain-specific enhancer, where the risk allele disrupts OCT2/4 binding, allowing increased interaction with the (Myc) promoter and increased (Myc) expression. Mutating the orthologous mouse rs55705857 locus accelerated tumor development in an Idh1(R132H)-driven LGG mouse model from 472 to 172 days and increased penetrance from 30% to 75%. Our work reveals mechanisms of the heritable predisposition to lethal glioma in ~40% of LGG patients. Brain Neoplasms, Glioma, Isocitrate Dehydrogenase, Mutation, Nucleotides, Animals, Mice Science 0036-8075 American Association for the Advancement of Science 378 6615 68-78 7 October 2022 Copyright © 2022 the authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original US government works. https://www.science.org/about/science-licenses-journal-article-reuse https://doi.org/10.1126/science.abj2890 View full text on PubMed Central View item in PubMed
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