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Updated: Jan 12, 2026

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Dissecting Oct4 enhancer function in pluripotent stem cells and mouse embryogenesis.

Daniel A Schmitz1, Daiji Okamura2, Masahiro Sakurai1

  • 1Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.

Stem Cell Reports
|November 7, 2025
PubMed
Summary
This summary is machine-generated.

The distal (DE) and proximal (PE) enhancers control OCT4 gene expression. DE is vital for naive pluripotency, while PE is essential for primed pluripotency, with both crucial for embryonic development.

Keywords:
OCT4POU5F1chimerasenhancerformative pluripotencynaive pluripotencypluripotent stem cellsprimed pluripotency

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Gene Regulation

Background:

  • OCT4 is a key regulator of pluripotency, essential for pluripotent stem cells (PSCs) and germ cells.
  • Its expression is governed by two cis-regulatory elements: the distal enhancer (DE) and proximal enhancer (PE).
  • The precise biological functions of DE and PE in pluripotency and development remain incompletely understood.

Purpose of the Study:

  • To investigate the distinct roles of the Oct4 DE and PE in maintaining different pluripotent states (naive vs. primed).
  • To elucidate the necessity of these enhancers for Oct4 expression during early embryonic development.
  • To generate novel PSC lines and mouse models for studying Oct4 regulation.

Main Methods:

  • Generation of PSC lines and mouse models with targeted deletions of Oct4 DE and PE.
  • Assessment of pluripotent states (naive and primed) in vitro.
  • Evaluation of in vivo contribution to chimeras and embryonic development.

Main Results:

  • The DE is dispensable for the primed pluripotent state but required for the naive state.
  • The PE is necessary for the primed state but not for the naive state.
  • PE-deficient naive PSCs could differentiate in vitro and form chimeras, but deletion of either enhancer in vivo caused early embryonic lethality.

Conclusions:

  • The Oct4 DE and PE play distinct and essential roles in regulating pluripotency and early embryonic development.
  • These findings highlight the differential requirements of enhancers for naive and primed pluripotency.
  • The developed genetic models provide valuable tools for dissecting Oct4 regulation in development.