In Vivo EPR Assessment of pH, pO2, Redox Status, and Concentrations of Phosphate and Glutathione in the Tumor Microenvironment.

In Vivo EPR Assessment of pH, pO2, Redox Status, and Concentrations of Phosphate and Glutathione in the Tumor Microenvironment.
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DOI:
10.3791/56624
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发表时间:
2018-03-16
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
通讯作者:
Khramtsov VV
Khramtsov VV
中科院分区:
其他
文献类型:
--
作者:
Bobko AA;Eubank TD;Driesschaert B;Khramtsov VV

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该方案展示了基于低场电子顺磁共振(EPR)的技术与功能顺磁探针相结合的能力,以提供关于化学肿瘤微环境(TME)的定量信息,包括PO2、pH、氧化还原状态、间质无机磷(PI)和细胞内谷胱甘肽(GSH)的浓度。特别是,最近开发的一种可溶性多功能三苯基探针(HOPE探针)的应用为体内同时测量细胞外空间的pH、PO2和PI提供了无与伦比的机会。使用单个探头测量三个参数,可以进行与探头分布和测量时间无关的相关性分析。
This protocol demonstrates the capability of low-field electron paramagnetic resonance (EPR)-based techniques in combination with functional paramagnetic probes to provide quantitative information on the chemical tumor microenvironment (TME), including pO2, pH, redox status, concentrations of interstitial inorganic phosphate (Pi), and intracellular glutathione (GSH). In particular, an application of a recently developed soluble multifunctional trityl probe provides unsurpassed opportunity for in vivo concurrent measurements of pH, pO2 and Pi in Extracellular space (HOPE probe). The measurements of three parameters using a single probe allow for their correlation analyses independent of probe distribution and time of the measurements.
DOI: 10.1158/1078-0432.ccr-05-2747
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