Dicyanostilbene-Derived Two-Photon Fluorescence Probe for Free Zinc Ions in Live Cells and Tissues with a Large Two-Photon Action Cross Section
作者:Chibao Huang、Junle Qu、Jing Qi、Meng Yan、Gaixia Xu
DOI:10.1021/ol200146j
日期:2011.3.18
A novel two-photon fluorescence probe for Zn2+ derived from dicyanostilbene as a two-photon fluorophore and 4-(pyridine-2-ylmethyl)piperazine as a novel Zn2+ ligand was developed. The probe shows a 72.5-fold fluorescence enhancement in response to Zn2+, a large two-photon action cross-section (580 GM), a noncytotoxic effect, and pH insensitivity in the biologically relevant range, and its dissociation
对于锌的新型双光子荧光探针2+从dicyanostilbene衍生作为双光子荧光团和4-(吡啶-2-基甲基)哌嗪,为新颖的Zn 2+配位体的开发。该探针显示出对Zn 2+的响应为72.5倍的荧光增强,较大的双光子作用截面(580 GM),无细胞毒性作用和在生物学相关范围内的pH敏感性,以及其解离常数(K d TP)为0.52±0.01μM。该探针可以选择性地检测活细胞中以及深度为80-150μm的活组织中1500 s内的游离Zn 2+离子,而不受其他金属离子和与膜结合的探针的干扰。