Abstract:
:Neural progenitor cells in the developing neocortex change over time to produce different neurons, a phenomenon that is also observed in other regions of the nervous system. Mouse Numb (also known as m-numb) and Numbl (also known as numblike or Nbl) are redundant but essential in maintaining virtually all progenitor cells during early neurogenesis. They do this by allowing cells to choose progenitor over neuronal fates. To determine whether their roles change as neurogenesis progresses, we conditionally ablated both genes in the embryonic dorsal forebrain after initial waves of neurogenesis. Here we report that these proteins continue to be required for progenitor-cell maintenance, contrary to recently reported findings. As occurs during early neurogenesis, the loss of Numb and Numbl causes premature progenitor-cell depletion and, consequently, a highly specific malformation of the neocortex and hippocampus. Because progenitor cells can proliferate without Numb and Numbl before neurogenesis, we propose that Numb-mediated asymmetric cell divisions, which diversify many cell fates in Drosophila melanogaster, represent a general mechanism in mammals for stem cells to balance self-renewal and differentiation.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Petersen PH,Zou K,Krauss S,Zhong Wdoi
10.1038/nn1289subject
Has Abstractpub_date
2004-08-01 00:00:00pages
803-11issue
8eissn
1097-6256issn
1546-1726pii
nn1289journal_volume
7pub_type
杂志文章abstract::Neurons in the rat primary auditory cortex (A1) generally cannot respond to tone sequences faster than 12 pulses per second (pps). To test whether experience can modify this maximum following rate in adult rats, trains of brief tones with random carrier frequency but fixed repetition rate were paired with electrical s...
journal_title:Nature neuroscience
pub_type: 杂志文章
doi:10.1038/3729
更新日期:1998-12-01 00:00:00
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journal_title:Nature neuroscience
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更新日期:2005-02-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 杂志文章
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journal_title:Nature neuroscience
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更新日期:2014-08-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 杂志文章
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journal_title:Nature neuroscience
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journal_title:Nature neuroscience
pub_type: 杂志文章
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更新日期:2013-09-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 杂志文章
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更新日期:2006-05-01 00:00:00
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doi:10.1038/nn1270
更新日期:2004-07-01 00:00:00
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更新日期:2016-11-01 00:00:00
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journal_title:Nature neuroscience
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doi:10.1038/nn.2223
更新日期:2009-01-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2009-04-01 00:00:00
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更新日期:2002-11-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 杂志文章
doi:10.1038/nn.2182
更新日期:2008-09-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2009-06-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 杂志文章,评审
doi:10.1038/nn.4418
更新日期:2016-12-01 00:00:00
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更新日期:2002-04-01 00:00:00
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journal_title:Nature neuroscience
pub_type: 已发布勘误
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更新日期:2018-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2011-11-06 00:00:00
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pub_type: 杂志文章
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更新日期:2005-08-01 00:00:00
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更新日期:2012-11-01 00:00:00
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更新日期:2019-03-01 00:00:00