Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Expression data from Bmi1-null c-Kit+Sca-1+Lineage marker- (KSL) hematopoietic stem/progenitor cells

ABSTRACT: Bmi1 is a component of polycomb repressive complex 1 and its role in the inheritance of the stemness of adult somatic stem cells has been well characterized. Bmi1 maintains the self-renewal capacity of adult stem cells, at least partially, by repressing the Ink4a/Arf locus that encodes a cyclin-dependent kinase inhibitor, p16Ink4a, and a tumor suppressor, p19Arf 14. Deletion of both Ink4a and Arf in Bmi1-deficient mice substantially restored the defective self-renewal capacity of HSCs and neural stem cells. Purified KSL cells from BM of wild-type, Bmi1-/-, Ink4a-/-Arf-/-, and Bmi1-/- Ink4a-/-Arf-/- mice were subjected to RNA extraction and hybridization on Affymetrix microarrays.

ORGANISM(S): Mus musculus

SUBMITTER: ATSUSHI IWAMA

PROVIDER: E-GEOD-19796 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Poised lineage specification in multipotential hematopoietic stem and progenitor cells by the polycomb protein Bmi1.

Oguro Hideyuki H Yuan Jin J Ichikawa Hitoshi H Ikawa Tomokatsu T Yamazaki Satoshi S Kawamoto Hiroshi H Nakauchi Hiromitsu H Iwama Atsushi A

Cell stem cell 20100301 3

Polycomb group (PcG) proteins are essential regulators of stem cells. PcG and trithorax group proteins mark developmental regulator gene promoters with bivalent domains consisting of overlapping repressive and activating histone modifications to keep them poised for activation in embryonic stem cells. Bmi1, a component of PcG complexes, maintains the self-renewal capacity of adult stem cells, but its role in multipotency remains obscure. Here we show that Bmi1 is critical for multipotency of hem ...[more]

PMID: 20207230

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Project description:Bmi1 is a component of the Polycomb-repressive complexes (PRC) and essential for maintaining the pool of adult stem cells. PRC are key regulators for embryonic development by modifying chromatin architecture and maintaining gene repression. To assess the role of Bmi1 in pluripotent stem cells and upon exit from pluripotency during differentiation, we studied forced Bmi1 expression in mouse embryonic stem cells (ESC). We found that ESC do not express detectable levels of Bmi1 RNA and protein and that forced Bmi1 expression had no obvious influence on ESC self-renewal. However, upon ESC differentiation Bmi1 effectively enhanced development of hematopoietic cells. Global transcriptional profiling identified a large array of genes that were differentially regulated during ESC differentiation by Bmi1. Importantly, we found that Bmi1 induced a prominent up-regulation of Gata2, a zinc finger transcription factor, which is essential for primitive hematopoietic cell generation from mesoderm. In addition, Bmi1 caused sustained growth and a more than 100-fold expansion of ESC-derived hematopoietic stem/progenitor cells within 2-3 weeks of culture. The enhanced proliferative capacity was associated with reduced Ink4a/Arf expression in Bmi1-transduced cells. Taken together, our experiments demonstrate distinct activities of Bmi1 in ESC and ESC-derived hematopoietic progenitor cells. In addition, Bmi1 enhances the propensity of ESC in differentiating towards the hematopoietic lineage. Thus, Bmi1 could be a candidate gene for engineered adult stem cell derivation from ESC. 8 samples in total. Bmi1 embryonic stem cells sample_1 (Bmi1_ESC_1) Bmi1 embryonic stem cells sample_2 (Bmi1_ESC_2) Untreated CCE embryonic stem cells (CCE_ESC_Control) Empty vector CCE embryonic stem cells (CCE_ESC_Vector) Bmi1 embryoid body sample_1 (Bmi1_EB_1) Bmi1 embryoid body sample_2 (Bmi1_EB_2) Empty vector control embryoid body sample_1 (Vector_EB_1) Empty vector control embryoid body sample_2 (Vector_EB_2)

Dataset Information

Expression data from Bmi1-null c-Kit+Sca-1+Lineage marker- (KSL) hematopoietic stem/progenitor cells

Publications

Poised lineage specification in multipotential hematopoietic stem and progenitor cells by the polycomb protein Bmi1.

Similar Datasets

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