Epigenetic Alterations of Repeated Relapses in Patient-matched Childhood Ependymomas

Sibo Zhao, Jia Li, Huiyuan Zhang, Lin Qi, Yuchen Du, Mari Kogiso, Frank K. Braun, Sophie Xiao, Yulun Huang, Jianfang Li, Wan Yee Teo, Holly Lindsay, Patricia Baxter, Jack M.F. Su, Adekunle Adesina, Miklós Laczik, Paola Genevini, Anne Clemence Veillard, Sol Schvartzman, Geoffrey BerguetShi Rong Ding, Liping Du, Clifford Stephan, Jianhua Yang, Peter J.A. Davies, Xinyan Lu, Murali Chintagumpala, Donald William Parsons, Laszlo Perlaky, Yun Fei Xia, Tsz Kwong Man, Yun Huang, Deqiang Sun, Xiaonan Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Recurrence is frequent in pediatric ependymoma (EPN). Our longitudinal integrated analysis of 30 patient-matched repeated relapses (3.67 ± 1.76 times) over 13 years (5.8 ± 3.8) reveals stable molecular subtypes (RELA and PFA) and convergent DNA methylation reprogramming during serial relapses accompanied by increased orthotopic patient derived xenograft (PDX) (13/27) formation in the late recurrences. A set of differentially methylated CpGs (DMCs) and DNA methylation regions (DMRs) are found to persist in primary and relapse tumors (potential driver DMCs) and are acquired exclusively in the relapses (potential booster DMCs). Integrating with RNAseq reveals differentially expressed genes regulated by potential driver DMRs (CACNA1H, SLC12A7, RARA in RELA and HSPB8, GMPR, ITGB4 in PFA) and potential booster DMRs (PLEKHG1 in RELA and NOTCH, EPHA2, SUFU, FOXJ1 in PFA tumors). DMCs predicators of relapse are also identified in the primary tumors. This study provides a high-resolution epigenetic roadmap of serial EPN relapses and 13 orthotopic PDX models to facilitate biological and preclinical studies.

Original languageEnglish (US)
Article number6689
JournalNature communications
Volume13
Issue number1
DOIs
StatePublished - Dec 2022

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • General
  • Physics and Astronomy(all)

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