期刊
CELL STEM CELL
卷 1, 期 5, 页码 515-528出版社
CELL PRESS
DOI: 10.1016/j.stem.2007.09.002
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资金
- NIA NIH HHS [AG-020938, R01 AG020938, R01 AG020938-05] Funding Source: Medline
- NINDS NIH HHS [R01 NS050217-03, NS-052842, R01 NS050217, NS-050217, R01 NS052842, R01 NS052842-03] Funding Source: Medline
To characterize the properties of adult neural stem cells (NSCs), we generated and analyzed Sox2-GFP transgenic mice. Sox2-GFP cells in the subgranular zone (SGZ) express markers specific for progenitors, but they represent two morphologically distinct populations that differ in proliferation levels. Lentivirus- and retrovirus-mediated fate-tracing studies showed that Sox2(+) cells in the SGZ have potential to give rise to neurons and astrocytes, revealing their multipotency at the population as well as at a single-cell level. A subpopulation of Sox2(+) cells gives rise to cells that retain Sox2, highlighting Sox2(+) cells as a primary source for adult NSCs. In response to mitotic signals, increased proliferation of Sox2 cells is coupled with the generation of Sox2(+) NSCs as well as neuronal precursors. An asymmetric contribution of Sox2(+) NSCs may play an important role in maintaining the constant size of the NSC pool and producing newly born neurons during adult neurogenesis.
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