Serial monitoring of endogenous neuroblast migration by cellular MRI.

Serial monitoring of endogenous neuroblast migration by cellular MRI.
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通过细胞 MRI 连续监测内源性神经母细胞迁移。

DOI:
10.1016/j.neuroimage.2011.04.063
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发表时间:
2011-08-01
期刊:
影响因子:
5.7
通讯作者:
Shapiro, Erik M.
Shapiro, Erik M.
中科院分区:
医学1区
文献类型:
--
作者:
Granot, Dorit;Scheinost, Dustin;Markakis, Eleni A.;Papademetris, Xenios;Shapiro, Erik M.

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可以使用基于 MRI 的细胞追踪来监测体内内源性神经祖细胞迁移。目前的方案是将微米大小的氧化铁颗粒(MPIO)注射到大脑神经干细胞龛附近的侧脑室。 MPIO 被内吞并整合到神经祖细胞群中,使它们通过梯度回波 MRI 可见。在这里,这种新方法被扩展到连续量化细胞迁移。最初,体内细胞标记方法得到了优化,因为 MPIO 的高敏感性效应在注射部位周围产生大量信号丢失,掩盖了早期迁移事件。然后,利用改进的标记条件,进行了为期两周的纵向研究,以量化标记的祖细胞向嗅球 (OB) 的迁移。注射后 3 天,我们计算出含有标记细胞的 OB 体积的 0.26%。到了 8 天,这一数量几乎翻了一番,达到 0.49%,并趋于稳定。这些 MRI 结果与我们来自 OB 的铁定量数据以及纯免疫组织化学研究的数据一致。
Endogenous neural progenitor cell migration in vivo can be monitored using MRI-based cell tracking. The current protocol is that micron sized iron oxide particles (MPIOs) are injected into the lateral ventricle proximal to the neural stem cell niche in the brain. MPIOs are endocytosed and incorporated into the neural progenitor cell population, making them visible by gradient echo MRI. Here this new method is extended to serially quantify cell migration. Initially, in vivo cell labeling methodologies were optimized, as high susceptibility effects from the MPIOs generate substantial signal loss around the injection site, masking early migratory events. Then, using improved labeling conditions, a longitudinal study was conducted over two weeks to quantify the migration of labeled progenitor cells towards the olfactory bulb (OB). By 3 days following injection, we calculated 0.26 % of the volume of the OB containing labeled cells. By 8 days, this volume nearly doubled to 0.49% and plateaued. These MRI results are in accordance with our data on iron quantification from the OB and with those from purely immunohistochemical studies.
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发表时间: 2005-05-01
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作者:
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