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题目:: Opposing roles of polycomb repressive complexes in hematopoietic stem and progenitor cells
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状态:: 发布时间June 8, 2010 , 更新时间 May 1, 2014 , 提交时间 April 19, 2010,
物种:: Mus musculus
摘要:: Polycomb group (PcG) proteins are transcriptional repressors with a central role in the establishment and maintenance of gene expression patterns during development. We have investigated the role of Polycomb Repressive Complexes (PRCs) in hematopoietic stem cells (HSCs) and progenitor populations. We show that mice with loss of function mutations in PRC2 components display enhanced HSC/progenitor population activity, whereas mutations that disrupt PRC1 or PhoRC are associated with HSC/progenitor cell defects. Since the hierarchical model of PRC action would predict synergistic effects of PRC1 and PRC2 mutation, these opposing effects suggest this model does not hold true in HSC/progenitor cells. To investigate the molecular targets of each complex in HSC/progenitor cells, we measured genome-wide expression changes associated with PRC-deficiency, and identified transcriptional networks that are differentially regulated by PRC1 and PRC2. These studies provide new insights into the mechanistic interplay between distinct PRCs and have important implications for approaching PcG proteins as therapeutic targets. Total RNA obtained from foetal liver LSK cells from mouse embryos with genes from different polycomb repressive complexes mutated or knocked-out was compared with wild-type samples.
实验种类:: transcription profiling by array
样本量:: 18
实验设计:
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数据号:: E-GEOD-21404, GSE21404
数据状态:: 无法自动分析，您可以尝试手动分析数据。

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