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EGFR gene variants are associated with specific somatic aberrations in glioma

Wibom, Carl (author)
Ghasimi, Soma (author)
Van Loo, Peter (author)
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Brännström, Thomas (author)
Trygg, Johan (author)
Lau, Ching (author)
Henriksson, Roger (author)
Bergenheim, Tommy (author)
Andersson, Ulrika (author)
Rydén, Patrik (author)
Melin, Beatrice (author)
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plosone.org 2012
2012
English.
In: PLoS ONE. - 1932-6203. ; 7:12, e47929
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Abstract Subject headings
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  • A number of gene variants have been associated with an increased risk of developing glioma. We hypothesized that the reported risk variants may be associated with tumor genomic instability. To explore potential correlations between germline risk variants and somatic genetic events, we analyzed matched tumor and blood samples from 95 glioma patients by means of SNP genotyping. The generated genotype data was used to calculate genome-wide allele-specific copy number profiles of the tumor samples. We compared the copy number profiles across samples and found two EGFR gene variants (rs17172430 and rs11979158) that were associated with homozygous deletion at the CDKN2A/B locus. One of the EGFR variants (rs17172430) was also associated with loss of heterozygosity at the EGFR locus. Our findings were confirmed in a separate dataset consisting of matched blood and tumor samples from 300 glioblastoma patients, compiled from publically available TCGA data. These results imply there is a functional effect of germline EGFR variants on tumor progression.

Subject headings

Medical and Health Sciences  (hsv)
Basic Medicine  (hsv)
Medical Genetics  (hsv)
Medicin och hälsovetenskap  (hsv)
Medicinska grundvetenskaper  (hsv)
Medicinsk genetik  (hsv)
Clinical Medicine  (hsv)
Cancer and Oncology  (hsv)
Klinisk medicin  (hsv)
Cancer och onkologi  (hsv)

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