دورية أكاديمية
The EGFRvIII transcriptome in glioblastoma, a meta-omics analysis.
| العنوان: | The EGFRvIII transcriptome in glioblastoma, a meta-omics analysis. |
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| المؤلفون: | Hoogstrate, Youri, Ghisai, Santoesha A., de Wit, Maurice, de Heer, Iris, Draaisma, Kaspar, van Riet, Job, van de Werken, Harmen J. G., Bours, Vincent, Buter, Jan, Vanden Bempt, Isabelle, Eoli, Marica, Franceschi, Enrico, Frenel, Jean-Sebastien, Gorlia, Thierry, Hanse, Monique C., Hoeben, Ann, Kerkhof, Melissa, Kros, Johan M., Leenstra, Sieger, Lombardi, Giuseppe, Lukacova, Slávka, Robe, Pierre, Sepulveda, Juan M., Taal, Walter, Taphoorn, Martin, Vernhout, René M., Walenkamp, Annemiek M. E., Watts, Colin, Weller, Michael, de Vos, Filip Y. F., Jenster, Guido W., van den Bent, Martin, French, Pim J. |
| المصدر: | Neuro-Oncology (2021) |
| بيانات النشر: | Oxford University Press, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Breakpoints, EGFR, EGFRvIII, RNA-seq, glioblastoma, Life sciences, Genetics & genetic processes, Sciences du vivant, Génétique & processus génétiques |
| الوصف: | BACKGROUND: EGFR is among the genes most frequently altered in glioblastoma, with exons 2-7 deletions (EGFRvIII) being amongst its most common genomic mutations. There are conflicting reports about its prognostic role and it remains unclear whether and how it differs in signalling compared with wildtype EGFR. METHODS: To better understand the oncogenic role of EGFRvIII, we leveraged four large datasets into one large glioblastoma transcriptome dataset (n=741) alongside 81 whole-genome samples from two datasets. RESULTS: The EGFRvIII/EGFR expression ratios differ strongly between tumours and ranges from 1% to 95%. Interestingly, the slope of relative EGFRvIII expression is near-linear, which argues against a more positive selection pressure than EGFR wildtype. An absence of selection pressure is also suggested by the similar survival between EGFRvIII positive and negative glioblastoma patients. EGFRvIII levels are inversely correlated with pan-EGFR (all wildtype and mutant variants) expression, which indicates that EGFRvIII has a higher potency in downstream pathway activation. EGFRvIII-positive glioblastomas have a lower CDK4 or MDM2 amplification incidence than EGFRvIII-negative (p=0.007), which may point towards crosstalk between these pathways. EGFRvIII-expressing tumours have an upregulation of 'classical' subtype genes compared to those with EGFR-amplification only (p=3.873e-6). Genomic breakpoints of the EGFRvIII deletions have a preference towards the 3' end of the large intron-1. These preferred breakpoints preserve a cryptic exon resulting in a novel EGFRvIII variant and preserve an intronic enhancer. CONCLUSIONS: These data provide deeper insights into the complex EGFRvIII biology and provide new insights for targeting EGFRvIII mutated tumours. |
| نوع الوثيقة: | journal article http://purl.org/coar/resource_type/c_6501Test article |
| اللغة: | English |
| العلاقة: | urn:issn:1522-8517; urn:issn:1523-5866 |
| DOI: | 10.1093/neuonc/noab231 |
| الوصول الحر: | https://orbi.uliege.be/handle/2268/265990Test |
| حقوق: | open access http://purl.org/coar/access_right/c_abf2Test info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsorb.265990 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.1093/neuonc/noab231 |
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