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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotent Transition

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus

PROVIDER: GSE174425 | GEO | 2022/05/11

REPOSITORIES: GEO

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition [scRNA-Seq]

Project description:The transition of mammalian early epiblast at different phases is characterized by the differences of pluripotent states and developmental potential, involving extensive transcriptome changes. However, the role of post-transcriptional RNA degradation modulation in cell fate transition remains largely unexplored. Here, we report that deadenylase Cnot8 of Ccr4-Not complex specifically plays a role in naïve-to-formative transition of pluripotent stem cells (PSCs). Disruption of Cnot8 results in early embryonic lethality, accompanying with the increased expression levels of naïve transcription factors in mouse epiblasts. Cnot8 depletion leads to accumulated expression abundances and increased poly(A) tail lengths of massive transcripts including mRNAs of naïve regulation networks, impairing the naïve-to-formative pluripotency conversion. Mechanistically, Cnot8 interacts with Tob1 and Pabpc1 to guarantee the prompt mRNA deadenylation and degradation of naïve regulation networks at specific time. Together, these findings delineate the mechanism underlying PSC fate transition through global degradation of mRNAs for naïve regulation networks by Cnot8.

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition (RNA-Seq)

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition (PAIso-Seq)

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Cnot8 eliminates naive regulation networks and is essential for naive-to-formative pluripotency transition.

Project description:Mammalian early epiblasts at different phases are characterized by naïve, formative, and primed pluripotency states, involving extensive transcriptome changes. Here, we report that deadenylase Cnot8 of Ccr4-Not complex plays essential roles during the transition from naïve to formative state. Knock out (KO) Cnot8 resulted in early embryonic lethality in mice, but Cnot8 KO embryonic stem cells (ESCs) could be established. Compared with the cells differentiated from normal ESCs, Cnot8 KO cells highly expressed a great many genes during their differentiation into the formative state, including several hundred naïve-like genes enriched in lipid metabolic process and gene expression regulation that may form the naïve regulation networks. Knockdown expression of the selected genes of naïve regulation networks partially rescued the differentiation defects of Cnot8 KO ESCs. Cnot8 depletion led to the deadenylation defects of its targets, increasing their poly(A) tail lengths and half-life, eventually elevating their expression levels. We further found that Cnot8 was involved in the clearance of targets through its deadenylase activity and the binding of Ccr4-Not complex, as well as the interacting with Tob1 and Pabpc1. Our results suggest that Cnot8 eliminates naïve regulation networks through mRNA clearance, and is essential for naïve-to-formative pluripotency transition.

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotent Transition

Project description:Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotent Transition

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition (PAIso-Seq)

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition [scRNA-Seq]

Project description:Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition [scRNA-Seq]

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Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition (RNA-Seq)

Project description:Cnot8 Eliminates Naïve Regulation Networks and Is Essential for Naïve-to-Formative Pluripotency Transition (RNA-Seq)

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Formative transition of human naïve pluripotent stem cells

Project description:Human naïve pluripotent stem cells (PSC) share features with pre-implantation epiblast. They thus provide an unmatched opportunity for characterising the developmental programme of pluripotency in Homo sapiens. Here we confirm that naïve PSC do not respond directly to germ layer induction, but must first acquire competence. Capacitation for multi-lineage differentiation occurs without exogenous growth factor stimulation and is facilitated by inhibition of Wnt signalling. Whole transcriptome profiling during this formative transition highlights dynamic changes in gene expression, affecting many cellular properties, including metabolism and epithelialisation. Notably, naïve pluripotency factors are exchanged for post-implantation factors, but competent cells remain devoid of lineage primed transcription. The gradual pace of transition for human naïve PSC is consistent with the timespan of primate development from blastocyst to gastrulation. Transcriptome trajectory during in vitro capacitation of human naïve cells tracks the progression of epiblast during embryogenesis in Macaca fascicularis, but shows greater divergence from mouse development. Thus the formative transition of naïve PSC in a simple culture system may recapitulate essential and specific features of pluripotency dynamics during an inaccessible period of human embryogenesis.

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