Design of liposome-based pH sensitive nanoSPIN probes: nano-sized particles with incorporated nitroxides.

Design of liposome-based pH sensitive nanoSPIN probes: nano-sized particles with incorporated nitroxides.
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DOI:
10.1039/b818184e
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发表时间:
2009-05
期刊:
The Analyst
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:
Woldman YY;Semenov SV;Bobko AA;Kirilyuk IA;Polienko JF;Voinov MA;Bagryanskaya EG;Khramtsov VV

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基于脂质体且包含氮氧自由基的纳米粒子(nanoSPINs)被设计用于电子顺磁共振(EPR)应用,作为生物系统中的pH探针。含有短杆菌肽A的脂质体磷脂膜对一种小的分析物H⁺表现出选择性通透性,同时保护包封的传感氮氧自由基免受生物还原剂的影响。pH敏感的nanoSPIN在大鼠心脏匀浆缺血模型中的应用能够监测缺血诱导的酸中毒,同时保护包封的氮氧自由基不被生物还原。
Liposome-based nanoSized Particles with Incorporated Nitroxides, or nanoSPINs, were designed for EPR applications as pH probes in biological systems. Phospholipid membrane of the liposomes with incorporated gramicidin A showed selective permeability to a small analyte, H+, while protecting entrapped sensing nitroxide from biological reductants. An application of the pH-sensitive nanoSPIN in an ischemia model in rat heart homogenate allows for monitoring ischemia-induced acidosis while protecting encapsulated nitroxide against bioreduction.
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