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Learn MoreThe onco-fetal RNA-binding protein IMP1 is expressed in fetal liver HSCs, but down-regulated in adult BM HSCs. We here show that when IMP1 is re-expressed in adult HSCs it induces a significant part of the fetal HSC gene expression signature. In addition, IMP1 re-expression leads to the expansion of phenotypic long term (LT-)HSCs, and increased generation of fetal peritoneal B1a B-cells and thymic -T-cells. Finally, IMP1 expressing adult LT-HSCs show dramatically improved self-renewal in serial transplantations compared to their normal counterparts. To assess the effect of IMP1 re-expression on the molecular properties of adult HSCs we performed RNA sequencing of total RNA isolated from Control and IMP1 HSCs sorted from primary recipient mice, transplanted with control or IMP1+ total bone marrow cells. SOURCE: Claus Nerlov (cnerlovlab.ncbi@gmail.com) - University of Oxford
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