English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Epigenetic mechanisms, including chromatin structure, chromatin dynamics and histone modifications play an important role for maintenance and differentiation of pluripotent embryonic stem cells. However, little is known about the molecular mechanisms of adult stem cell specification and differentiation. Here, we used intestinal stem cells (ISCs) as a model system to reveal the epigenetic changes coordinating gene expression programs during these processes. We found that two distinct epigenetic mechanisms participate in establishing the transcriptional program promoting ISC specification from embryonic progenitors. A large number of adult ISC signature genes are targets of repressive DNA methylation in embryonic intestinal epithelial progenitors. On the other hand, genes essential for embryonic development acquire H3K27me3 and are silenced during ISC specification. We also show that the repression of ISC signature genes as well as the activation of enterocyte specific genes is accompanied by a global loss of H2A.Z during ISCs differentiation. Our results reveal that, already during ISC specification, an extensive remodeling of chromatin both at promoters and distal regulatory elements organizes transcriptional landscapes operating in differentiated enterocytes, thus explaining similar chromatin modification patterns in the adult gut epithelium.

Dynamic changes in chromatin states during specification and differentiation of adult intestinal stem cells