In vivo cytometry of antigen-specific t cells using 19F MRI.

In vivo cytometry of antigen-specific t cells using 19F MRI.
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DOI:
10.1002/mrm.22063
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发表时间:
2009-09
影响因子:
3.3
通讯作者:
Ahrens, Eric T.
Ahrens, Eric T.
中科院分区:
医学3区
文献类型:
--
作者:
Srinivas, Mangala;Turner, Michael S.;Janjic, Jelena M.;Morel, Penelope A.;Laidlaw, David H.;Ahrens, Eric T.

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在我们试图理解获得性免疫时,非侵入性方法成像表型定义的免疫细胞的运输是至关重要的。提出了一种基于19F磁共振成像的方法,用于跟踪和量化特定表型的细胞。这些方法被应用于使用抗原特异性T细胞的小鼠炎症模型。用全氟聚醚(PFPE)纳米乳剂体外细胞内标记的T细胞和细胞被转移到接受局部抗原接种的宿主。连续21天的纵向~(19)F核磁共振显示,T细胞在排出抗原的淋巴结内动态积聚和清除。根据延时的~(19)F-MRI数据计算LN的表观T细胞数。用荧光分析法研究了体内T细胞分裂对19F-MRI细胞定量准确性的影响。总体而言,使用PFPE标记和19F MRI的活体细胞术广泛适用于全身细胞生物分布的研究。
Noninvasive methods to image the trafficking of phenotypically defined immune cells are paramount as we attempt to understand adaptive immunity. A 19F MRI-based methodology for tracking and quantifying cells of a defined phenotype is presented. These methods were applied to a murine inflammation model using antigen-specific T cells. The T cells that were intracellularly labeled ex vivo with a perfluoropolyether (PFPE) nanoemulsion and cells were transferred to a host receiving a localized inoculation of antigen. Longitudinal 19F MRI over 21 days revealed a dynamic accumulation and clearance of T cells in the lymph node (LN) draining the antigen. The apparent T-cell numbers were calculated in the LN from the time-lapse 19F MRI data. The effect of in vivo T-cell division on the 19F MRI cell quantification accuracy was investigated using fluorescence assays. Overall, in vivo cytometry using PFPE labeling and 19F MRI is broadly applicable to studies of whole-body cell biodistribution.
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