Drosophila type II neuroblast lineages keep Prospero levels low to generate large clones that contribute to the adult brain central complex.

Drosophila type II neuroblast lineages keep Prospero levels low to generate large clones that contribute to the adult brain central complex.
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DOI:
10.1186/1749-8104-5-26
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发表时间:
2010-10-01
期刊:
影响因子:
3.6
通讯作者:
Doe CQ
Doe CQ
中科院分区:
生物学3区
文献类型:
--
作者:
Bayraktar OA;Boone JQ;Drummond ML;Doe CQ

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组织稳态依赖于干细胞适当调节自我更新与分化的能力。果蝇神经干细胞(成神经细胞)是研究自我更新和分化的模型系统。最近的工作已经确定了两种类型的幼虫神经母细胞,具有不同的自我更新/分化特性。I型成神经细胞从一系列小的基底子细胞(神经节母细胞)中出芽,每个子细胞产生两个神经元。II型神经母细胞从称为中间祖细胞(INPs)的小基底子细胞中出芽,每个INPs产生6至12个神经元。I型成神经细胞和INPs具有核Asense和细胞质Prospero,而II型成神经细胞缺乏这两种转录因子。在这里,我们测试是否普洛斯彼罗区分I/II型成神经细胞的身份或增殖概况,使用几个新的特点Gal 4线。我们使用19 H 09-Gal 4系(在II型成神经细胞中表达,但在相邻的I型成神经细胞中不表达)或9D 11-Gal 4系(在INPs中表达,但在II型成神经细胞中不表达)来错误表达C570。我们发现,差异Prospero表达不区分I型和II型成神经细胞的身份,但Prospero调节增殖在I型和II型成神经细胞谱系。此外,我们使用9D 11谱系追踪表明,II型谱系产生小场和大场神经元内的成年中央复合体,运动,飞行和视觉模式记忆所需的大脑区域。
Tissue homeostasis depends on the ability of stem cells to properly regulate self-renewal versus differentiation. Drosophila neural stem cells (neuroblasts) are a model system to study self-renewal and differentiation. Recent work has identified two types of larval neuroblasts that have different self-renewal/differentiation properties. Type I neuroblasts bud off a series of small basal daughter cells (ganglion mother cells) that each generate two neurons. Type II neuroblasts bud off small basal daughter cells called intermediate progenitors (INPs), with each INP generating 6 to 12 neurons. Type I neuroblasts and INPs have nuclear Asense and cytoplasmic Prospero, whereas type II neuroblasts lack both these transcription factors. Here we test whether Prospero distinguishes type I/II neuroblast identity or proliferation profile, using several newly characterized Gal4 lines. We misexpress prospero using the 19H09-Gal4 line (expressed in type II neuroblasts but no adjacent type I neuroblasts) or 9D11-Gal4 line (expressed in INPs but not type II neuroblasts). We find that differential prospero expression does not distinguish type I and type II neuroblast identities, but Prospero regulates proliferation in both type I and type II neuroblast lineages. In addition, we use 9D11 lineage tracing to show that type II lineages generate both small-field and large-field neurons within the adult central complex, a brain region required for locomotion, flight, and visual pattern memory.
DOI: 10.1101/lm.1331809
发表时间: 2009-05-01
期刊: LEARNING & MEMORY
影响因子: 2
作者:
Pan, Yufeng;Zhou, Yanqiong;Liu, Li
通讯作者: Liu, Li
DOI: 10.1242/jcs.01525
发表时间: 2004-12-01
影响因子: 4
作者:
Albertson, R;Chabu, C;Doe, CQ
通讯作者: Doe, CQ
DOI: 10.1016/s0092-8674(01)00465-2
发表时间: 2001-08-24
期刊: CELL
影响因子: 64.5
作者:
Isshiki, T;Pearson, B;Doe, CQ
通讯作者: Doe, CQ
DOI: 10.1016/j.cell.2006.01.038
发表时间: 2006-03-24
期刊: CELL
影响因子: 64.5
作者:
Betschinger, J;Mechtler, K;Knoblich, JA
通讯作者: Knoblich, JA
DOI: 10.1002/dneu.20648
发表时间: 2008-08-01
影响因子: 3
作者:
Boone, Jason Q.;Doe, Chris Q.
通讯作者: Doe, Chris Q.