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- W2739786919 abstract "Introduction: The 5 year mortality rate for stage 4 metastatic neuroblastoma (NBL) is ~50%; however, the stage 4S subset of NBL is typically classified as low-risk with tumors exhibiting spontaneous regression. To date, the underlying genetic mechanisms influencing this distinct phenotype remain unknown. Method: To identify genetic determinants specific to the 4S phenotype, we performed genome-wide association study (GWAS) analyses. Blood DNA samples from 6,195 NBL patients and 11,384 non-NBL controls were genotyped using Illumina SNP arrays. European ancestry subjects were selected for inclusion in a discovery [stage 4S (n=148), stage 4 (n=996), non-NBL controls (n=9,923)] or replication cohort [stage 4S (n=76), stage 4 (n=608), non-NBL controls (n=1,461)]. Following imputation using 1KG Phase 3, we conducted case:case comparisons including stage 4S vs. 4 and stage 4S vs. 1, followed by comparisons of NBL cases in each group to matched non-NBL controls. Variants uniquely associated with 4S NBL were defined as those meeting the following criteria: (1) stage 4S vs. 4 meta P -5 and P 0.05) or odds ratio in the opposite direction in 4 vs. non-NBL controls. Results: 4S-specific variants that met our criteria spanned multiple regions with several harboring genes important to neuronal function including 9q34 (SARDH/DBH; rs2502746), 1p32.2 (KCNH1; rs12122529), 1p34 (KCNQ4; chr 1:41317634), 7q34 (CNTNAP2; rs79403134) and 2q24.1 (KCNJ3; rs78829625). At the 9q34 locus, rs2502746 showed further evidence as an expression quantitative trait locus (eQTL) for Dopamine Beta-Hydroxylase Antisense RNA1( DBH-AS1 P = 1.9 x 10 -5 sun-exposed skin) and Sarcosine Dehydrogenase SARDH expression (P = 2.5 x 10 -6 whole blood). Other 4S-specific loci observed include 3q27.3 (rs113207181), 8p21.3 (rs12548388), and 15q12 (rs62189512). Notably, none of the previously identified NBL susceptibility loci were found to be associated with 4S NBL in the 4S vs. non-NBL control comparison, suggesting a unique genetic basis for this enigmatic subset. Discussion: Although a unifying mechanism underlying 4S NBL has yet to be identified, our results suggest a potential role for ion-channel and neuronal function genes. Ongoing efforts include investigating the role these genes and associated pathways play in NBL, including an integrative genomic, epigenomic and transcriptome analysis of stage 4 and 4S NBL. Citation Format: Zalman Vaksman, Lee D. McDaniel, Maura Diamond, John M. Maris, Sharon J. Diskin. Identifying the genetic basis of stage 4S neuroblastoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 690. doi:10.1158/1538-7445.AM2017-690" @default.
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- W2739786919 date "2017-07-01" @default.
- W2739786919 modified "2023-09-25" @default.
- W2739786919 title "Abstract 690: Identifying the genetic basis of stage 4S neuroblastoma" @default.
- W2739786919 doi "https://doi.org/10.1158/1538-7445.am2017-690" @default.
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