Unknown,Transcriptomics,Genomics,Proteomics

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Histone variant H3.3 is an essential maternal factor for oocyte reprogramming


ABSTRACT: Mature oocyte cytoplasm can reprogram somatic cell nuclei to the pluripotent state through a series of sequential events including protein exchange between the donor nucleus and ooplasm, chromatin remodeling, and pluripotency gene reactivation. Maternal factors that are responsible for this reprogramming process remain largely unidentified. Here, we demonstrate that knockdown of histone variant H3.3 in mouse oocytes results in compromised reprogramming and down-regulation of key pluripotency genes; and this compromised reprogramming both for developmental potentials and transcription of pluripotency genes can be rescued by injecting exogenous H3.3 mRNA, but not H3.2 mRNA into oocytes in somatic cell nuclear transfer (SCNT) embryos. We show that maternal H3.3, and not H3.3 in the donor nucleus, is essential for successful reprogramming of somatic cell nucleus into the pluripotent state. Furthermore, H3.3 is involved in this reprogramming process by remodeling the donor nuclear chromatin through replacement of donor nucleus-derived H3 with de novo synthesized maternal H3.3 protein. Our study shows that H3.3 is a crucial maternal factor for oocyte reprogramming and provides a practical model to directly dissect the oocyte for its reprogramming capacity. Transcriptome sequencing of 4-cell NT embryos, Luciferase 4-cell SCNT embryos, 4-cell NT embryos_H3.3KD, 4-cell NT embryos_H3.3KD+H3.3mRNA, H3.3 KD + H3.2 mRNA SCNT embryos

ORGANISM(S): Mus musculus

SUBMITTER: Olivier Elemento 

PROVIDER: E-GEOD-56762 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Histone variant H3.3 is an essential maternal factor for oocyte reprogramming.

Wen Duancheng D   Banaszynski Laura A LA   Liu Ying Y   Geng Fuqiang F   Noh Kyung-Min KM   Xiang Jenny J   Elemento Olivier O   Rosenwaks Zev Z   Allis C David CD   Rafii Shahin S  

Proceedings of the National Academy of Sciences of the United States of America 20140505 20


Mature oocyte cytoplasm can reprogram somatic cell nuclei to the pluripotent state through a series of sequential events including protein exchange between the donor nucleus and ooplasm, chromatin remodeling, and pluripotency gene reactivation. Maternal factors that are responsible for this reprogramming process remain largely unidentified. Here, we demonstrate that knockdown of histone variant H3.3 in mouse oocytes results in compromised reprogramming and down-regulation of key pluripotency gen  ...[more]

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