Sonophoric nanoprobe aided pH measurement in vivo using photoacoustic spectroscopy.

Sonophoric nanoprobe aided pH measurement in vivo using photoacoustic spectroscopy.
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DOI:
10.1039/c3an00093a
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发表时间:
2013-06-07
期刊:
The Analyst
影响因子:
--
通讯作者:
Wang X
Wang X
中科院分区:
其他
文献类型:
--
作者:
Ray A;Yoon HK;Koo Lee YE;Kopelman R;Wang X

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本文提出了一种利用混合光学成像技术、光声成像(PAI)和pH敏感的聚合物纳米探针的体内pH传感的新方法。合成了含有pH敏感染料的疏水核纳米探针,通过在大鼠关节模型上的实验,将其用于体内和体外的pH水平测量,获得了小于0.1pH单位的精度。还证明了聚丙烯酰胺基质中的疏水官能团能够保护分子染料不受血浆中蛋白质的影响,并防止染料渗出。
Presented here is a novel method of in vivo pH sensing utilizing a hybrid optical imaging technique, photoacoustic imaging (PAI), and pH sensitive polymeric nanoprobes. Nanoprobes with hydrophobic core containing a pH sensitive dye were synthesized and used to measure the pH level ex vivo first and then in vivo by performing experiments on a rat joint model, with an achieved precision of less than 0.1 pH units. The ability of the hydrophobic functional groups in the polyacrylamide matrix to shield the molecular dye from being affected by the proteins in the plasma, and prevent the dye from leaching out, is also demonstrated.
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