Robust uptake of magnetic nanoparticles (MNPs) by central nervous system (CNS) microglia: implications for particle uptake in mixed neural cell populations.

Robust uptake of magnetic nanoparticles (MNPs) by central nervous system (CNS) microglia: implications for particle uptake in mixed neural cell populations.
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DOI:
10.3390/ijms11030967
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发表时间:
2010-03-08
影响因子:
5.6
通讯作者:
Chari DM
Chari DM
中科院分区:
生物学2区
文献类型:
--
作者:
Pickard MR;Chari DM

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磁性纳米颗粒(MNP)是用于监测一系列神经病理过程的重要造影剂;小胶质细胞显著促进病理部位的MNP摄取。小胶质细胞活化发生在大多数CNS病理学之后,但尚不清楚这种活化是否改变MNP摄取、细胞内加工和毒性。我们评估了这些参数在小胶质细胞培养和没有实验的“激活”。小胶质细胞在基础条件下表现出快速和广泛的MNP摄取,活化后未发现变化;在较高的颗粒浓度下观察到显著的小胶质细胞毒性。基于我们的研究结果,我们认为,在混合神经细胞群体中,内源性CNS小胶质细胞对MNP的贪婪摄取可以显著限制其他细胞亚型的摄取。
Magnetic nanoparticles (MNPs) are important contrast agents used to monitor a range of neuropathological processes; microglial cells significantly contribute to MNP uptake in sites of pathology. Microglial activation occurs following most CNS pathologies but it is not known if such activation alters MNP uptake, intracellular processing and toxicity. We assessed these parameters in microglial cultures with and without experimental ‘activation’. Microglia showed rapid and extensive MNP uptake under basal conditions with no changes found following activation; significant microglial toxicity was observed at higher particle concentrations. Based on our findings, we suggest that avid MNP uptake by endogenous CNS microglia could significantly limit uptake by other cellular subtypes in mixed neural cell populations.
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