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PMID:17644732
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| Citation |
Chen, Y, Haviernik, P, Bunting, KD and Yang, YC (2007) Cited2 is required for normal hematopoiesis in the murine fetal liver. Blood 110:2889-98 |
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| Abstract |
Cited2 (cAMP-responsive elementbinding protein [CBP]/p300-interacting transactivators with glutamic acid [E] and aspartic acid [D]-rich tail 2) is a newly identified transcriptional modulator. Knockout of the Cited2 gene results in embryonic lethality with embryos manifesting heart and neural tube defects. Cited2-/- fetal liver displayed significant reduction in the numbers of Lin(-)c-Kit+Sca-1+ cells, Lin(-)c-Kit+ cells, and progenitor cells of different lineages. Fetal liver cells from Cited2-/- embryos gave rise to markedly reduced number of colonies in the colony-forming unit assay. Primary and secondary transplantation studies showed significantly compromised reconstitution of T-lymphoid, B-lymphoid, and myeloid lineages in mice that received a transplant of Cited2-/- fetal liver cells. Competitive reconstitution experiments further showed that fetal liver hematopoietic stem cell (HSC) function is severely impaired due to Cited2 deficiency. Microarray analysis showed decreased expression of Wnt5a and a panel of myeloid molecular markers such as PRTN3, MPO, Neutrophil elastase, Cathepsin G, and Eosinophil peroxidase in Cited2-/- fetal livers. Decreased expression of Bmi-1, Notch1, LEF-1, Mcl-1, and GATA2 was also observed in Cited2-/- Lin(-)c-Kit+ cells. The present study uncovers for the first time a novel role of Cited2 in the maintenance of hematopoietic homeostasis during embryogenesis and thus provides new insights into the molecular regulation of hematopoietic development. |
| Links |
PubMed PMC2018670 Online version:10.1182/blood-2007-01-066316 |
| Keywords |
Animals; Bone Marrow Transplantation; Cell Differentiation/physiology; Cell Proliferation; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Fetus; Gene Expression Regulation, Developmental; Hematopoiesis/physiology; Hematopoietic Stem Cells/cytology; Hematopoietic Stem Cells/metabolism; Immunophenotyping; Liver/cytology; Liver/embryology; Liver/metabolism; Mice; Mice, Knockout; Oligonucleotide Array Sequence Analysis; Repressor Proteins/genetics; Repressor Proteins/metabolism; Reverse Transcriptase Polymerase Chain Reaction; Trans-Activators/genetics; Trans-Activators/metabolism; Transduction, Genetic |
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