The Influence of Hypoxia and pH on Bioluminescence Imaging of Luciferase-Transfected Tumor Cells and Xenografts

The Influence of Hypoxia and pH on Bioluminescence Imaging of Luciferase-Transfected Tumor Cells and Xenografts
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缺氧和 pH 对荧光素酶转染的肿瘤细胞和异种移植物生物发光成像的影响

DOI:
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发表时间:
2013
期刊:
International Journal of Molecular Imaging
影响因子:
--
通讯作者:
T. Chung
T. Chung
中科院分区:
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文献类型:
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作者:
A. Khalil;M. Jameson;W. Broaddus;P. Lin;Seth M. Dever;Sarah E. Golding;E. Rosenberg;K. Valerie;T. Chung

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生物发光成像(BLI)是一种相对较新的无创技术,用于定量评估活体动物模型中肿瘤生长和治疗效果。BLI涉及在氧和ATP存在下给予底物Bl后,由表达Bl的细胞产生光。在本研究中,缺氧,低灌注,和pH值对BLI信号(BLS)强度的影响进行了评估,在体外培养的细胞和体内使用裸鼠异种移植模型。在急性和慢性缺氧的情况下,BLS的强度显着降低。细胞密度、活力和pH的变化也影响BLS。尽管BLI是一种方便的非侵入性肿瘤评估工具,但在解释BLS强度时应考虑这些因素,特别是在由于快速生长、血液供应不足和/或治疗而可能缺氧的实体瘤中。
Bioluminescence imaging (BLI) is a relatively new noninvasive technology used for quantitative assessment of tumor growth and therapeutic effect in living animal models. BLI involves the generation of light by luciferase-expressing cells following administration of the substrate luciferin in the presence of oxygen and ATP. In the present study, the effects of hypoxia, hypoperfusion, and pH on BLI signal (BLS) intensity were evaluated in vitro using cultured cells and in vivo using a xenograft model in nude mice. The intensity of the BLS was significantly reduced in the presence of acute and chronic hypoxia. Changes in cell density, viability, and pH also affected BLS. Although BLI is a convenient non-invasive tool for tumor assessment, these factors should be considered when interpreting BLS intensity, especially in solid tumors that could be hypoxic due to rapid growth, inadequate blood supply, and/or treatment.
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