Oncotarget

Research Papers:

Global analysis of H3K4me3 and H3K27me3 profiles in glioblastoma stem cells and identification of SLC17A7 as a bivalent tumor suppressor gene

Biaoyang Lin _, Hwahyung Lee, Jae-Geun Yoon, Anup Madan, Elizabeth Wayner, Sanja Tonning, Parvinder Hothi, Brett Schroeder, Ilya Ulasov, Gregory Foltz, Leroy Hood and Charles Cobbs

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Oncotarget. 2015; 6:5369-5381. https://doi.org/10.18632/oncotarget.3030

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Abstract

Biaoyang Lin1,2,3, Hwahyung Lee4, Jae-Geun Yoon4, Anup Madan4,6, Elizabeth Wayner4, Sanja Tonning4, Parvinder Hothi4, Brett Schroeder4, Ilya Ulasov4, Gregory Foltz4, Leroy Hood5, Charles Cobbs4

1Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, China

2Dept. of Urology, University of Washington, Seattle, WA 98195, USA

3System Biology Division, Zhejiang-California International Nanosystem Institute (ZCNI), Zhejiang University, Hangzhou, Zhejiang 310058, China

4Swedish Neuroscience Institute, Swedish Medical Center, Seattle, WA 98122, USA

5The Institute for Systems Biology, Seattle, WA 98109, USA

6LabCorp Clinical Trials (Genomics Laboratory), Seattle, WA 98109, USA

Correspondence to:

Biaoyang Lin, e-mail: Biaoylin@gmail.com

Keywords: H3K4me3, H3K27me3, glioblastoma, stem cells, SLC17A7

Received: August 22, 2014     Accepted: January 01, 2015     Published: January 22, 2015

ABSTRACT

Epigenetic changes, including H3K4me3 and H3K27me3 histone modification, play an important role in carcinogenesis. However, no genome-wide histone modification map has been generated for gliomas. Here, we report a genome-wide map of H3K4me3 and H3K27me3 histone modifications for 8 glioma stem cell (GSC) lines, together with the associated gene activation or repression patterns. In addition, we compared the genome-wide histone modification maps of GSC lines to those of astrocytes to identify unique gene activation or repression profiles in GSCs and astrocytes. We also identified a set of bivalent genes, which are genes that are associated with both H3K4me3 and H3K27me3 marks and are poised for action in embryonic stem cells. These bivalent genes are potential targets for inducing differentiation in glioblastoma (GBM) as a therapeutic approach. Finally, we identified SLC17A7 as a bivalent tumor suppressor gene in GBM, as it is down-regulated at both the protein and RNA levels in GBM tissues compared with normal brain tissues, and it inhibits GBM cell proliferation, migration and invasion.


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