Higher chromatin mobility supports totipotency and precedes pluripotency in vivo

Ana Bošković, André Eid, Julien Pontabry, Takashi Ishiuchi, Coralie Spiegelhalter, Edupuganti V.S. Raghu Ram, Eran Meshorer, Maria Elena Torres-Padilla

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

The fusion of the gametes upon fertilization results in the formation of a totipotent cell. Embryonic chromatin is expected to be able to support a large degree of plasticity. However, whether this plasticity relies on a particular conformation of the embryonic chromatin is unknown. Moreover, whether chromatin plasticity is functionally linked to cellular potency has not been addressed. Here, we adapted fluorescence recovery after photobleaching (FRAP) in the developing mouse embryo and show that mobility of the core histones H2A, H3.1, and H3.2 is unusually high in two-cell stage embryos and decreases as development proceeds. The transition toward pluripotency is accompanied by a decrease in histone mobility, and, upon lineage allocation, pluripotent cells retain higher mobility than the differentiated trophectoderm. Importantly, totipotent two-cell-like embryonic stem cells also display high core histone mobility, implying that reprogramming toward totipotency entails changes in chromatin mobility. Our data suggest that changes in chromatin dynamics underlie the transitions in cellular plasticity and that higher chromatin mobility is at the nuclear foundations of totipotency.

Original languageEnglish
Pages (from-to)1042-1047
Number of pages6
JournalGenes and Development
Volume28
Issue number10
DOIs
Publication statusPublished - 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Genetics
  • Developmental Biology

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