Esrrb extinction triggers dismantling of naïve pluripotency and marks commitment to differentiation

Nicola Festuccia, Florian Halbritter, Andrea Corsinotti, Alessia Gagliardi, Douglas Colby, Simon R Tomlinson, Ian Chambers

Research output: Contribution to journalArticlepeer-review

Abstract

Self‐renewal of embryonic stem cells (ESCs) cultured in LIF/fetal calf serum (FCS) is incomplete with some cells initiating differentiation. While this is reflected in heterogeneous expression of naive pluripotency transcription factors (TFs), the link between TF heterogeneity and differentiation is not fully understood. Here, we purify ESCs with distinct TF expression levels from LIF/FCS cultures to uncover early events during commitment from naïve pluripotency. ESCs carrying fluorescent Nanog and Esrrb reporters show Esrrb downregulation only in Nanoglow cells. Independent Esrrb reporter lines demonstrate that Esrrbnegative ESCs cannot effectively self‐renew. Upon Esrrb loss, pre‐implantation pluripotency gene expression collapses. ChIP‐Seq identifies different regulatory element classes that bind both OCT4 and NANOG in Esrrbpositive cells. Class I elements lose NANOG and OCT4 binding in Esrrbnegative ESCs and associate with genes expressed preferentially in naïve ESCs. In contrast, Class II elements retain OCT4 but not NANOG binding in ESRRB‐negative cells and associate with more broadly expressed genes. Therefore, mechanistic differences in TF function act cumulatively to restrict potency during exit from naïve pluripotency.
Original languageEnglish
Article numbere95476
Number of pages20
JournalEMBO Journal
Volume37
Issue number21
Early online date1 Oct 2018
DOIs
Publication statusPublished - 2 Nov 2018

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