Cerebellar stem cells do not produce neurons and astrocytes in adult mouse.

Cerebellar stem cells do not produce neurons and astrocytes in adult mouse.
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成年小鼠的小脑干细胞不产生神经元和星形胶质细胞。

DOI:
10.1016/j.bbrc.2014.05.131
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发表时间:
2014-07
影响因子:
3.1
通讯作者:
Fu, Yinghui
Fu, Yinghui
中科院分区:
生物学4区
文献类型:
--
作者:
Su, Xin;Guan, Wuqiang;Yu, Yong-Chun;Fu, Yinghui

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尽管之前的研究表明一些成年哺乳动物中存在小脑干细胞,但人们对这些干细胞是否能够产生新的神经元和星形胶质细胞知之甚少。在这项通过腹腔注射溴脱氧尿苷(BrdU)的研究中,我们发现成年小鼠小脑中存在丰富的BrdU+细胞,但其数量和密度随着时间的推移显着下降。我们还发现不同小脑区域的细胞增殖率存在差异。这些BrdU+细胞中,极少数是mash1+或nestin+干细胞,绝大多数小脑干细胞处于静止状态。通过体内逆转录病毒注射获得的数据表明,干细胞在成年小鼠小脑中不产生神经元和星形胶质细胞。相反,一些被逆转录病毒标记的细胞是 Iba1+小胶质细胞。这些结果表明,成年小鼠小脑中存在很少的干细胞,并且这些干细胞在生理条件下都不参与神经发生和星形体发生。
Although previous studies implied that cerebellar stem cells exist in some adult mammals, little is known about whether these stem cells can produce new neurons and astrocytes. In this study by bromodeoxyuridine (BrdU) intraperitoneal (i.p.) injection, we found that there are abundant BrdU+cells in adult mouse cerebellum, and their quantity and density decreases significantly over time. We also found cell proliferation rate is diversified in different cerebellar regions. Among these BrdU+cells, very few are mash1+or nestin+stem cells, and the vast majority of cerebellar stem cells are quiescent. Data obtained byin vivoretrovirus injection indicate that stem cells do not produce neurons and astrocytes in adult mouse cerebellum. Instead, some cells labeled by retrovirus are Iba1+microglia. These results indicate that very few stem cells exist in adult mouse cerebellum, and none of these stem cells contribute to neurogenesis and astrogenesis under physiological condition.
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