Musashi-2 controls cell fate, lineage bias, and TGF-β signaling in HSCs.
Musashi-2 controls cell fate, lineage bias, and TGF-β signaling in HSCs.
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DOI:
10.1084/jem.20130736
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发表时间:
2014-01-13
期刊:
影响因子:
--
通讯作者:
Kharas MG
中科院分区:
文献类型:
--
作者:
Park SM;Deering RP;Lu Y;Tivnan P;Lianoglou S;Al-Shahrour F;Ebert BL;Hacohen N;Leslie C;Daley GQ;Lengner CJ;Kharas MG
Musashi-2 is an important regulator of the hematopoietic stem cell translatome and balances HSC homeostasis and lineage bias. Hematopoietic stem cells (HSCs) are maintained through the regulation of symmetric and asymmetric cell division. We report that conditional ablation of the RNA-binding protein Msi2 results in a failure of HSC maintenance and engraftment caused by a loss of quiescence and increased commitment divisions. Contrary to previous studies, we found that these phenotypes were independent of Numb. Global transcriptome profiling and RNA target analysis uncovered Msi2 interactions at multiple nodes within pathways that govern RNA translation, stem cell function, and TGF-β signaling. Msi2-null HSCs are insensitive to TGF-β–mediated expansion and have decreased signaling output, resulting in a loss of myeloid-restricted HSCs and myeloid reconstitution. Thus, Msi2 is an important regulator of the HSC translatome and balances HSC homeostasis and lineage bias.
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