Prospective isolation of late development multipotent precursors whose migration is promoted by EGFR

被引:63
作者
Ciccolini, F
Mandl, C
Hölzl-Wenig, G
Kehlenbach, A
Hellwig, A
机构
[1] Heidelberg Univ, Interdisciplinary Ctr Neurosci, Dept Neurobiol, D-69120 Heidelberg, Germany
[2] Heidelberg Univ, Zentrum Mol Biol, D-69120 Heidelberg, Germany
关键词
EGF receptor; precursors; neural stem cells;
D O I
10.1016/j.ydbio.2005.05.007
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
A simple procedure to isolate neural stem cells would greatly facilitate direct studies of their properties. Here, we exploited the increase in EGF receptor (EGFR) levels, that occurs in late development stem cells or in younger precursors upon exposure to FGF-2, to isolate cells expressing high levels of EGFR (EGFR(high)) from the developing and the adult brain. Independently of age and region of isolation, EGFR(high) cells were highly enriched in multipotent precursors and displayed similar antigenic characteristics, with the exception of GFAP and Lex/SSEA-1 that were mainly expressed in adult EGFR(high) cells. EGFR levels did not correlate with neurogenic potential, indicating that the increase in EGFR expression does not directly affect differentiation. Instead, in the brain, many EGFR(high) precursors showed tangential orientation and, whether isolated from the cortex or striatum, EGFRhigh precursors displayed characteristics of cells originating from the ventral GZ such as expression D1x and Mash-1 and the ability to generate GABAergic neurons and oligodendrocytes. Moreover, migration of EGFRhigh cells on telencephalic slices required EGFR activity. Thus, the developmentally regulated increase in EGFR levels may affect tangential migration of multipotent precursors. In addition, it can be used as a marker to effectively isolate telencephalic multipotent precursors from embryonic and adult tissue. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:112 / 125
页数:14
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