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Published in: Journal of Neuro-Oncology 2/2019

01-04-2019 | Glioblastoma | Clinical Study

Race influences survival in glioblastoma patients with KPS ≥ 80 and associates with genetic markers of retinoic acid metabolism

Authors: Meijing Wu, Jason Miska, Ting Xiao, Peng Zhang, J. Robert Kane, Irina V. Balyasnikova, James P. Chandler, Craig M. Horbinski, Maciej S. Lesniak

Published in: Journal of Neuro-Oncology | Issue 2/2019

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Abstract

Purpose

To study whether the clinical outcome and molecular biology of gliomas in African-American patients fundamentally differ from those occurring in Whites.

Methods

The clinical information and molecular profiles (including gene expression array, non-silent somatic mutation, DNA methylation and protein expression) were downloaded from The Cancer genome atlas (TCGA). Electronic medical records were abstracted from Northwestern Medicine Enterprise Data Warehouse (NMEDW) for analysis as well. Grade II–IV Glioma patients were all included.

Results

931 Whites and 64 African-American glioma patients from TCGA were analyzed. African-American with Karnofsky performance score (KPS) ≥ 80 have significantly lower risk of death than similar white Grade IV Glioblastoma (GBM) patients [HR (95% CI) = 0.47 (0.23, 0.98), P = 0.0444, C-index = 0.68]. Therefore, we further compared gene expression profiles between African-American GBM patients and Whites with KPS ≥ 80. Extrapolation of genes significantly associated with increased African-American patient survival revealed a set of 13 genes with a possible role in this association, including elevated expression of genes previously identified as increased in African-American breast and colon cancer patients (e.g. CRYBB2). Furthermore, gene set enrichment analysis revealed retinoic acid (RA) metabolism as a pathway significantly upregulated in African-American GBM patients who survive longer than Whites (Z-score = − 2.10, Adjusted P-value = 0.0449).

Conclusions

African Americans have prolonged survival with glioma which is influenced only by initial KPS score. Genes previously associated with both racial disparities in cancer and pathways associated with RA metabolism may play an important role in glioma etiology. In the future exploration of these genes and pathways may inform novel therapies for this incurable disease.
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Metadata
Title
Race influences survival in glioblastoma patients with KPS ≥ 80 and associates with genetic markers of retinoic acid metabolism
Authors
Meijing Wu
Jason Miska
Ting Xiao
Peng Zhang
J. Robert Kane
Irina V. Balyasnikova
James P. Chandler
Craig M. Horbinski
Maciej S. Lesniak
Publication date
01-04-2019
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 2/2019
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-019-03110-5

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