Magnesium Ion Selective Two-Photon Fluorescent Probe Based on a Benzo[<i>h</i>]chromene Derivative for in Vivo Imaging
作者:Hwan Myung Kim、Pil Rye Yang、Mun Sik Seo、Jae-Sung Yi、Jin Hee Hong、Seung-Joon Jeon、Young-Gyu Ko、Kyoung J. Lee、Bong Rae Cho
DOI:10.1021/jo062341m
日期:2007.3.1
two-photon probe for the detection of free Mg2+ ions in living cells and live tissues has been developed. The probe can be excited by 880 nm laser photons, emits strong two-photon excited fluorescence in response to Mg2+ ions, can be easily loaded into the cell and tissue, shows high photostability, and can measure the Mg2+ ion concentration without interference by Ca2+ ions in living cells. The intracellular
已经开发出一种新颖的双光子探针,用于检测活细胞和活组织中的游离Mg 2+离子。该探针可以被880 nm激光光子激发,响应Mg 2+离子发出强的双光子激发荧光,可以轻松地装载到细胞和组织中,显示出高的光稳定性,并且可以测量Mg 2+离子浓度而无需Ca 2+离子对活细胞的干扰。通过双光子过程确定的Mg 2+的细胞内解离常数(K d i)为2.5 mM,适用于动态Mg 2+浓度测量。另外,该探针能够使用双光子显微镜(TPM)在数百微米深度的活组织中对游离Mg 2+的内源性存储进行成像。