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In vivo cellular mri of dendritic cell migration using micrometer-sized iron oxide (MPIO) particles

机译:使用微米级氧化铁(MPIO)颗粒的树突状细胞迁移的体内细胞mri

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Purpose: This study seeks to assess the use of labeling with micron-sized iron oxide (MPIO) particles for the detection and quantification of the migration of dendritic cells (DCs) using cellular magnetic resonance imaging (MRI). Procedures: DCs were labeled with red fluorescent MPIO particles for detection by cellular MRI and a green fluorescent membrane dye (PKH67) for histological detection. MPIO-labeled DCs or unlabeled control DCs were injected into mice footpads at two doses (0.1×10 6 and 1×10 6). Images were acquired at 3 Tesla before DC injection and 2, 3, and 7 days post-DC injection. Results: Labeling DCs with MPIO particles did not affect viability, but it did alter markers of DC activation and maturation. MRI and fluorescence microscopy allowed for the detection of MPIOlabeled DCs within the draining popliteal nodes after their injection into the footpad. Conclusions: This paper presents the first report of the successful use of fluorescent MPIO particles to label and track DC migration.
机译:目的:本研究旨在评估使用微米级氧化铁(MPIO)颗粒进行标记,以利用细胞核磁共振成像(MRI)检测和定量树突状细胞(DC)迁移的用途。程序:DCs用红色荧光MPIO颗粒标记以通过细胞MRI进行检测,并用绿色荧光膜染料(PKH67)进行组织学检测。将MPIO标记的DC或未标记的对照DC以两种剂量(0.1×10 6和1×10 6)注射到小鼠足垫中。在DC注入之前以及DC注入后2、3和7天在3 Tesla处获取图像。结果:用MPIO颗粒标记DC不会影响生存力,但会改变DC激活和成熟的标志物。 MRI和荧光显微镜检查可以检测出排水的pop节内MPIO标记的DC,并将其注射到脚垫中。结论:本文介绍了成功使用荧光MPIO颗粒标记和跟踪DC迁移的第一份报告。

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