Higher chromatin mobility supports totipotency and precedes pluripotency in vivo
| Autor: | Coralie Spiegelhalter, André Eid, Ana Bošković, Maria-Elena Torres-Padilla, Takashi Ishiuchi, Julien Pontabry, Edupuganti V.S. Raghu Ram, Eran Meshorer |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Pluripotent Stem Cells
Cell fate determination Biology Histones 03 medical and health sciences Mice Research Communication 0302 clinical medicine Microscopy Electron Transmission Genetics Animals Humans Induced pluripotent stem cell Embryonic Stem Cells 030304 developmental biology 0303 health sciences Totipotent Fluorescence recovery after photobleaching Embryo Mammalian Embryonic stem cell Chromatin Cell biology Mice Inbred C57BL Histone biology.protein Mice Inbred CBA Reprogramming Totipotent Stem Cells 030217 neurology & neurosurgery Developmental Biology Fluorescence Recovery After Photobleaching |
| Zdroj: | Genes & Development |
| ISSN: | 0890-9369 |
| DOI: | 10.1101/gad.238881.114 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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