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Glioma risk associated with extent of estimated European genetic ancestry in African Americans and Hispanics.

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Date
2020-02
ICR Author
Houlston, Richard
Author
Ostrom, QT
Egan, KM
Nabors, LB
Gerke, T
Thompson, RC
Olson, JJ
LaRocca, R
Chowdhary, S
Eckel-Passow, JE
Armstrong, G
Wiencke, JK
Bernstein, JL
Claus, EB
Il'yasova, D
Johansen, C
Lachance, DH
Lai, RK
Merrell, RT
Olson, SH
Sadetzki, S
Schildkraut, JM
Shete, S
Houlston, RS
Jenkins, RB
Wrensch, MR
Melin, B
Amos, CI
Huse, JT
Barnholtz-Sloan, JS
Bondy, ML
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Type
Journal Article
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Abstract
Glioma incidence is highest in non-Hispanic Whites, and to date, glioma genome-wide association studies (GWAS) to date have only included European ancestry (EA) populations. African Americans and Hispanics in the US have varying proportions of EA, African (AA) and Native American ancestries (NAA). It is unknown if identified GWAS loci or increased EA is associated with increased glioma risk. We assessed whether EA was associated with glioma in African Americans and Hispanics. Data were obtained for 832 cases and 675 controls from the Glioma International Case-Control Study and GliomaSE Case-Control Study previously estimated to have <80% EA, or self-identify as non-White. We estimated global and local ancestry using fastStructure and RFMix, respectively, using 1,000 genomes project reference populations. Within groups with ≥40% AA (AFR ≥0.4 ), and ≥15% NAA (AMR ≥0.15 ), genome-wide association between local EA and glioma was evaluated using logistic regression conditioned on global EA for all gliomas. We identified two regions (7q21.11, p = 6.36 × 10 -4 ; 11p11.12, p = 7.0 × 10 -4 ) associated with increased EA, and one associated with decreased EA (20p12.13, p = 0.0026) in AFR ≥0.4 . In addition, we identified a peak at rs1620291 (p = 4.36 × 10 -6 ) in 7q21.3. Among AMR ≥0.15 , we found an association between increased EA in one region (12q24.21, p = 8.38 × 10 -4 ), and decreased EA in two regions (8q24.21, p = 0. 0010; 20q13.33, p = 6.36 × 10 -4 ). No other significant associations were identified. This analysis identified an association between glioma and two regions previously identified in EA populations (8q24.21, 20q13.33) and four novel regions (7q21.11, 11p11.12, 12q24.21 and 20p12.13). The identifications of novel association with EA suggest regions to target for future genetic association studies.
URI
https://repository.icr.ac.uk/handle/internal/4197
DOI
https://doi.org/10.1002/ijc.32318
Collections
  • Genetics and Epidemiology
Subject
Humans
Glioma
Genetic Predisposition to Disease
Risk
Case-Control Studies
Genotype
Polymorphism, Single Nucleotide
Middle Aged
African Americans
European Continental Ancestry Group
Hispanic Americans
Female
Male
Genome-Wide Association Study
Genetic Loci
Genetic Association Studies
Research team
Cancer Genomics
Language
eng
Date accepted
2019-02-14
License start date
2020-02
Citation
International journal of cancer, 2020, 146 (3), pp. 739 - 748

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