Diagenode

Epigenetic Alterations of Repeated Relapses in Patient-matchedChildhood Ependymomas.


Zhao Sibo et al.

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.

Tags
Premium RRBS Kit
DNA Methylation Profiling (RRBS Service)

Share this article

Published
November, 2022

Source

Products used in this publication

  • Methylation kit icon
    C02030036
    Premium RRBS kit V2 RRBS for low DNA amounts ...
  • Methylation kit icon
    C02030037
    Premium RRBS kit V2 x96 RRBS for low DNA amoun...
  • default alt
    G02020000
    RRBS Service (Reduced Representation Bisulfite ...

Events

 See all events

News

 See all news


The European Regional Development Fund and Wallonia are investing in your future.

Extension of industrial buildings and new laboratories.


       Site map   |   Contact us   |   Conditions of sales   |   Conditions of purchase   |   Privacy policy   |   Diagenode Diagnostics