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Snip1 and PRC2 coordinate the intrinsic apoptosis, cell division, and neurogenesis in the developing brain [RNA-seq]

ABSTRACT: Snip1 and PRC2 coordinate the intrinsic apoptosis, cell division, and neurogenesis in the developing brain [RNA-seq]

PROVIDER: PRJNA874020 | ENA |

REPOSITORIES: ENA

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Snip1 and PRC2 coordinate the intrinsic apoptosis, cell division, and neurogenesis in the developing brain

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Snip1 and PRC2 coordinate the intrinsic apoptosis, cell division, and neurogenesis in the developing brain

Project description:This SuperSeries is composed of the SubSeries listed below.

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Project description:The histone methyltransferase complex PRC2 controls key steps in developmental transitions and cell fate choices. However, its roles in vertebrate eye development remain unknown. Here we report that in Xenopus PRC2 regulates the progression of retinal progenitors from proliferation to differentiation. We show that the PRC2 core components are enriched in retinal progenitors and downregulated with differentiation. Knockdown of the PRC2 core component Ezh2 leads to reduced retinal progenitor proliferation in part due to upregulation of the cdk inhibitor p15Ink4b. In addition, while PRC2 knockdown does not alter eye patterning, retinal progenitor gene expression or expression of the neural competence factor Sox2, it does cause suppression of proneural bHLH gene expression, indicating that PRC2 is critical for the initiation of neural differentiation in the retina. Consistent with this, knocking down or blocking PRC2 function constrains the generation of most retinal neural cell types and promotes a Mueller glial cell fate decision. We also show that Wnt/?-catenin signaling acting through the receptor Frizzled 5, but independent of Sox2, regulates expression of key PRC2 subunits in the developing retina. This is consistent with a role for this pathway in coordinating proliferation and the transition to neurogenesis in the Xenopus retina. Our data establishes PRC2 as a regulator of proliferation and differentiation during eye development. Xenopus embryos were injected at the 8-cell stage with 5ng Ezh2 ATG MO or 5ng control MO (scrambled sequence of Ezh2 ATG MO) together with 400 pg mRNA for GFP as a lineage tracer. At stage 27, GFP-positive eyes were isolated by microdissection. Pools of 20-25 eyes were used to prepare total RNA for each sample on the microarray. 4 control and 4 Ezh2 ATG MO samples were hybridized to Agilent 1-color microarrays.

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The polycomb repressive complex PRC2 regulates proliferation and neurogenesis in the Xenopus retina, and is governed by Wnt/beta-catenin signaling

Project description:The histone methyltransferase complex PRC2 controls key steps in developmental transitions and cell fate choices. However, its roles in vertebrate eye development remain unknown. Here we report that in Xenopus PRC2 regulates the progression of retinal progenitors from proliferation to differentiation. We show that the PRC2 core components are enriched in retinal progenitors and downregulated with differentiation. Knockdown of the PRC2 core component Ezh2 leads to reduced retinal progenitor proliferation in part due to upregulation of the cdk inhibitor p15Ink4b. In addition, while PRC2 knockdown does not alter eye patterning, retinal progenitor gene expression or expression of the neural competence factor Sox2, it does cause suppression of proneural bHLH gene expression, indicating that PRC2 is critical for the initiation of neural differentiation in the retina. Consistent with this, knocking down or blocking PRC2 function constrains the generation of most retinal neural cell types and promotes a Mueller glial cell fate decision. We also show that Wnt/β-catenin signaling acting through the receptor Frizzled 5, but independent of Sox2, regulates expression of key PRC2 subunits in the developing retina. This is consistent with a role for this pathway in coordinating proliferation and the transition to neurogenesis in the Xenopus retina. Our data establishes PRC2 as a regulator of proliferation and differentiation during eye development.

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