Format

Send to

Choose Destination
Gut. 2019 Jan;68(1):49-61. doi: 10.1136/gutjnl-2017-314817. Epub 2017 Nov 15.

DNA methylation defines regional identity of human intestinal epithelial organoids and undergoes dynamic changes during development.

Author information

1
Department of Paediatrics, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK.
2
European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus, Cambridge, UK.
3
Anne McLaren Laboratory & Department of Surgery, Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge, UK.
4
Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, UK.
5
Department of Paediatric Gastroenterology, Hepatology and Nutrition, Cambridge University Hospitals, Addenbrooke's, Cambridge, UK.
6
Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge, UK.
7
Department of Genetics, University of Cambridge, Cambridge, UK.
8
Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany.
#
Contributed equally

Abstract

OBJECTIVE:

Human intestinal epithelial organoids (IEOs) are increasingly being recognised as a highly promising translational research tool. However, our understanding of their epigenetic molecular characteristics and behaviour in culture remains limited.

DESIGN:

We performed genome-wide DNA methylation and transcriptomic profiling of human IEOs derived from paediatric/adult and fetal small and large bowel as well as matching purified human gut epithelium. Furthermore, organoids were subjected to in vitro differentiation and genome editing using CRISPR/Cas9 technology.

RESULTS:

We discovered stable epigenetic signatures which define regional differences in gut epithelial function, including induction of segment-specific genes during cellular differentiation. Established DNA methylation profiles were independent of cellular environment since organoids retained their regional DNA methylation over prolonged culture periods. In contrast to paediatric and adult organoids, fetal gut-derived organoids showed distinct dynamic changes of DNA methylation and gene expression in culture, indicative of an in vitro maturation. By applying CRISPR/Cas9 genome editing to fetal organoids, we demonstrate that this process is partly regulated by TET1, an enzyme involved in the DNA demethylation process. Lastly, generating IEOs from a child diagnosed with gastric heterotopia revealed persistent and distinct disease-associated DNA methylation differences, highlighting the use of organoids as disease-specific research models.

CONCLUSIONS:

Our study demonstrates striking similarities of epigenetic signatures in mucosa-derived IEOs with matching primary epithelium. Moreover, these results suggest that intestinal stem cell-intrinsic DNA methylation patterns establish and maintain regional gut specification and are involved in early epithelial development and disease.

KEYWORDS:

intestinal cell lines; intestinal development; intestinal epithelium; intestinal gene regulation; intestinal stem cell

PMID:
29141958
DOI:
10.1136/gutjnl-2017-314817
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center