共查询到20条相似文献,搜索用时 31 毫秒
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An integrative genomic approach identifies p73 and p63 as activators of miR-200 microRNA family transcription 总被引:1,自引:0,他引:1
Knouf EC Garg K Arroyo JD Correa Y Sarkar D Parkin RK Wurz K O'Briant KC Godwin AK Urban ND Ruzzo WL Gentleman R Drescher CW Swisher EM Tewari M 《Nucleic acids research》2012,40(2):499-510
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Bonnet D 《Birth defects research. Part C, Embryo today : reviews》2003,69(3):219-229
Considerable effort has been made in recent years in defining the embryonic origin of the hematopoietic stem cell (HSC). Using transgenic mouse models, a number of genes that regulate the formation, self-renewal, or differentiation of HSCs have been identified. Of particular interest, it has recently been shown that key regulators of definitive blood formation played a crucial role in adult HSC development. Specifically, the use of some of these regulatory molecules has dramatically improved the potential of adult HSC expansion. Furthermore, the elucidation of the molecular phenotype of the HSC has just begun. Finally, unexpected degrees of HSC developmental or differentiation plasticity have emerged. In this review, we will summarize the recent advances made in the human HSC field, and we will examine the impacts these discoveries may have clinically and on our understanding of the organization of the human hematopoietic system. 相似文献
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C.J. Cairney G. Sanguinetti E. Ranghini A.D. Chantry M.C. Nostro A. Bhattacharyya C.N. Svendsen W.N. Keith I. Bellantuono 《生物化学与生物物理学报:疾病的分子基础》2009,1792(4):353-363
Stem cells are central to the development and maintenance of many tissues. This is due to their capacity for extensive proliferation and differentiation into effector cells. More recently it has been shown that the proliferative and differentiative ability of stem cells decreases with age, suggesting that this may play a role in tissue aging. Down syndrome (DS), is associated with many of the signs of premature tissue aging including T-cell deficiency, increased incidence of early Alzheimer-type, Myelodysplastic-type disease and leukaemia. Previously we have shown that both hematopoietic (HSC) and neural stem cells (NSC) in patients affected by DS showed signs of accelerated aging. In this study we tested the hypothesis that changes in gene expression in HSC and NSC of patients affected by DS reflect changes occurring in stem cells with age. The profiles of genes expressed in HSC and NSC from DS patients highlight pathways associated with cellular aging including a downregulation of DNA repair genes and increases in proapoptotic genes, s-phase cell cycle genes, inflammation and angiogenesis genes. Interestingly, Notch signaling was identified as a potential hub, which when deregulated may drive stem cell aging. These data suggests that DS is a valuable model to study early events in stem cell aging. 相似文献