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首页> 外文期刊>Molecular imaging and biology: MIB : the official publication of the Academy of Molecular Imaging >Characterization of the inflammatory response in a photothrombotic stroke model by MRI: Implications for stem cell transplantation
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Characterization of the inflammatory response in a photothrombotic stroke model by MRI: Implications for stem cell transplantation

机译:MRI对血栓性中风模型中炎症反应的表征:对干细胞移植的意义

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Purpose: The aim of this study was to evaluate the specificity of magnetic resonance imaging (MRI) contrast in a photothrombotic (PT) stroke model with and without engraftment of superparamagnetic iron oxide (SPIO)-labeled stem cells. Procedures: We monitored animals with PT stroke versus animals with PT stroke and stem cell engraftment by T 2/T 2*w MRI 4-8 h and 2, 4, 6/7 and 14 days after PT induction. Results were correlated with immunohistochemistry. Results: T 2*w MRI images showed hypointense contrast due to the accumulation of inflammatory cells and corresponding iron accumulation and glial scar formation in the border zone of the lesion, similar as what was observed for SPIO-labeled cells. Histological analysis was thus indispensable to distinguish between labeled transplanted cells and immune cells. Conclusion: These results raise caution regarding the non-invasive monitoring of SPIO-labeled transplanted stem cells by MRI in models that result in a strong inflammatory response.
机译:目的:本研究的目的是评估在有或没有植入超顺磁性氧化铁(SPIO)标记的干细胞的光血栓性(PT)中风模型中磁共振成像(MRI)对比的特异性。程序:我们在PT诱导后4-8 h和2、4、6 / 7和14天通过T 2 / T 2 * w MRI监测了患有PT中风的动物与具有PT中风和干细胞移植的动物。结果与免疫组织化学相关。结果:T 2 * w MRI图像显示低边界对比度,这是由于炎性细胞的积累以及相应的铁积累和胶质瘢痕在病变边界区域的形成所致,与SPIO标记的细胞相似。因此,组织学分析对于区分标记的移植细胞和免疫细胞是必不可少的。结论:这些结果引起了在对引起强烈炎症反应的模型中通过MRI无创监测SPIO标记的移植干细胞的谨慎态度。

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