Hydroethidine: a fluorescent redox probe for locating hypoxic cells in spheroids and murine tumours.

Hydroethidine: a fluorescent redox probe for locating hypoxic cells in spheroids and murine tumours.
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Hydroethidine:一种荧光氧化还原探针,用于定位球状体和鼠肿瘤中的缺氧细胞。

DOI:
10.1038/bjc.1989.281
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发表时间:
1989
影响因子:
8.8
通讯作者:
Olive,PL
Olive,PL
中科院分区:
医学1区
文献类型:
--
作者:
Olive,PL

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荧光氧化还原探针hydroethidine的积累和代谢速度约5倍,在有氧比缺氧的哺乳动物细胞。中国仓鼠V79球状体中的荧光模式也表明,内部缺氧细胞代谢药物的能力较低;仅当细胞荧光超过约500倍背景时,才在细胞中观察到毒性。在与空气或氮气平衡的培养基中,染色剂的细胞积累迅速,并在30分钟后开始趋于平稳;乙锭的损失最初很快,30分钟后损失较慢,共孵育2小时后观察到代谢物乙锭在染色和未染色细胞之间转移。基于乙锭荧光从照射的球状体分选细胞提供了好氧辐射敏感性和缺氧辐射抗性细胞的良好分离,尽管使用灌注探针Hoechst 33342的分离是上级的。与小鼠SCCVII鳞状细胞癌的类似实验表明,hydroethidine可能是一个有用的间接染色定位缺氧细胞在实验肿瘤中,当与灌注探针,如Hoechst 33342组合使用。
The fluorescent redox probe hydroethidine was accumulated and metabolised about five times faster in aerobic than in hypoxic mammalian cells. Patterns of fluorescence in Chinese hamster V79 spheroids also indicated that internal hypoxic cells were less able to metabolise the drug; toxicity was observed in cells only when cell fluorescence exceeded about 500 times background. In medium equilibrated with air or nitrogen, cell accumulation of the stain was rapid, and began to plateau after 30 min; loss of ethidium was initially rapid, with a slower component after 30 min, and transfer of the metabolite ethidium between stained and unstained cells was observed after 2 h co-incubation. Sorting cells from irradiated spheroids on the basis of ethidium fluorescence provided good separation of aerobic radiosensitive and hypoxic radioresistant cells, although separation using the perfusion probe, Hoechst 33342, was superior. Similar experiments with the murine SCCVII squamous cell carcinoma suggested that hydroethidine might be a useful indirect stain for locating hypoxic cells in experimental tumours when used in combination with a perfusion probe such as Hoechst 33342.
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发表时间: 1981
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发表时间: 1981-04
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DOI: --
发表时间: 1986
期刊: Radiation research
影响因子: 3.4
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DOI: --
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影响因子: 2.6
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