Cell-of-Origin DNA Methylation Signatures Are Maintained during Colorectal Carcinogenesis

Felix Bormann, Manuel Rodríguez-Paredes, Felix Lasitschka, Dominic Edelmann, Tanja Musch, Axel Benner, Yehudit Bergman, Sebastian M. Dieter, Claudia R. Ball, Hanno Glimm, Heinz G. Linhart, Frank Lyko*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

Colorectal adenomas are precursor lesions of colorectal cancers and represent clonal amplifications of single cells from colonic crypts. DNA methylation patterns specify cell-type identity during cellular differentiation and, therefore, provide opportunities for the molecular analysis of tumors. We have now analyzed DNA methylation patterns in colorectal adenomas and identified three biologically defined subclasses that describe different intestinal crypt differentiation stages. Importantly, colorectal carcinomas could be classified into the same methylation subtypes, reflecting their shared cell types of origin with adenomas. Further data analysis also revealed significantly reduced overall survival for one of the subtypes. Our results provide a concept for understanding the methylation patterns observed in colorectal cancer and provide opportunities for tumor subclassification and patient stratification. Using DNA methylation profiling, Bormann et al. identify three DNA methylation signatures that are conserved between normal crypt sections, colorectal adenomas, and colorectal carcinomas. This suggests that cell-of-origin DNA methylation signatures are stably maintained during colorectal carcinogenesis and provides a framework for the subclassification of colorectal cancer.

Original languageAmerican English
Pages (from-to)3407-3418
Number of pages12
JournalCell Reports
Volume23
Issue number11
DOIs
StatePublished - 12 Jun 2018

Bibliographical note

Publisher Copyright:
© 2018 The Author(s)

Keywords

  • DNA methylation
  • cell-of-origin
  • colorectal adenoma
  • colorectal carcinoma
  • epigenomics

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