Imaging Different Interactions of Mercury and Silver with Live Cells by a Designed Fluorescence Probe Rhodamine B Selenolactone
摘要:
Rhodamine B selenolactone has been designed, synthesized, and characterized as a new fluorescent probe for imaging both Hg2+ and Ag+ in live cells to better understand their distinct toxicities to organisms. The probe is designed based on the fact that selenium has a strong affinity for mercury and silver, and is constructed by Incorporating a Se atom into the spirocyclic structure of rhodamine. It exhibits a rapid and specific spectroscopic off-on response to Hg2+ and Ag` instead of other species, with detection limits of 23 nM Hg2+ and 52 nM Ag+. Moreover, the probe is membrane-permeable, and can react with Ag+ even in the presence of Cl- because of the higher affinity of Se than Cl- for Ag+, which makes it of potential use for imaging not only Hg2+ but also Ag+ in live cells. This applicability has been demonstrated by imaging Hg2+ and Ag+ in Hela cells. It is observed that the reaction of Ag+ with the probe insido the cells occurs much slower than that of Hg2+, which is ascribed to the high concentration of cellular chloride ions inhibiting the formation of sufficient free Ag+. The present finding is helpful to get an insight into the different interaction mechanism of Hg2+ and Ag+ with cells, and more applications of the probe may be expected for studying the behaviors of Hg2+ and Ag+ in various biosystems.
Imaging Different Interactions of Mercury and Silver with Live Cells by a Designed Fluorescence Probe Rhodamine B Selenolactone
摘要:
Rhodamine B selenolactone has been designed, synthesized, and characterized as a new fluorescent probe for imaging both Hg2+ and Ag+ in live cells to better understand their distinct toxicities to organisms. The probe is designed based on the fact that selenium has a strong affinity for mercury and silver, and is constructed by Incorporating a Se atom into the spirocyclic structure of rhodamine. It exhibits a rapid and specific spectroscopic off-on response to Hg2+ and Ag` instead of other species, with detection limits of 23 nM Hg2+ and 52 nM Ag+. Moreover, the probe is membrane-permeable, and can react with Ag+ even in the presence of Cl- because of the higher affinity of Se than Cl- for Ag+, which makes it of potential use for imaging not only Hg2+ but also Ag+ in live cells. This applicability has been demonstrated by imaging Hg2+ and Ag+ in Hela cells. It is observed that the reaction of Ag+ with the probe insido the cells occurs much slower than that of Hg2+, which is ascribed to the high concentration of cellular chloride ions inhibiting the formation of sufficient free Ag+. The present finding is helpful to get an insight into the different interaction mechanism of Hg2+ and Ag+ with cells, and more applications of the probe may be expected for studying the behaviors of Hg2+ and Ag+ in various biosystems.
An unprecedented strategy for selective and sensitive fluorescence detection of nitric oxide based on its reaction with a selenide
作者:Chengdong Sun、Wen Shi、Yanchao Song、Wei Chen、Huimin Ma
DOI:10.1039/c1cc12174j
日期:——
A new strategy that utilizes the interaction between NO and a selenide is reported for fluorescence detection of NO, in which rhodamine B selenolactone serves as a model selenide.
A fluorescent probe based on selenolactone displays unique fluorescence enhancement and UV vis spectral change for mercury/methylmercury species, which were attributed to deselenation reaction. The value of this system was successfully demonstrated by its use in detecting inorganic mercury/methylmercury species in cells and zebrafish. (C) 2010 Elsevier Ltd. All rights reserved.
Imaging Different Interactions of Mercury and Silver with Live Cells by a Designed Fluorescence Probe Rhodamine B Selenolactone
作者:Wen Shi、Shuna Sun、Xiaohua Li、Huimin Ma
DOI:10.1021/ic902192a
日期:2010.2.1
Rhodamine B selenolactone has been designed, synthesized, and characterized as a new fluorescent probe for imaging both Hg2+ and Ag+ in live cells to better understand their distinct toxicities to organisms. The probe is designed based on the fact that selenium has a strong affinity for mercury and silver, and is constructed by Incorporating a Se atom into the spirocyclic structure of rhodamine. It exhibits a rapid and specific spectroscopic off-on response to Hg2+ and Ag` instead of other species, with detection limits of 23 nM Hg2+ and 52 nM Ag+. Moreover, the probe is membrane-permeable, and can react with Ag+ even in the presence of Cl- because of the higher affinity of Se than Cl- for Ag+, which makes it of potential use for imaging not only Hg2+ but also Ag+ in live cells. This applicability has been demonstrated by imaging Hg2+ and Ag+ in Hela cells. It is observed that the reaction of Ag+ with the probe insido the cells occurs much slower than that of Hg2+, which is ascribed to the high concentration of cellular chloride ions inhibiting the formation of sufficient free Ag+. The present finding is helpful to get an insight into the different interaction mechanism of Hg2+ and Ag+ with cells, and more applications of the probe may be expected for studying the behaviors of Hg2+ and Ag+ in various biosystems.