Two-Photon Fluorescent Probes for Long-Term Imaging of Calcium Waves in Live Tissue
作者:Hwan Myung Kim、Bo Ra Kim、Myoung Jin An、Jin Hee Hong、Kyoung J. Lee、Bong Rae Cho
DOI:10.1002/chem.200701453
日期:2008.2.27
ene-derived two-photon fluorescent Ca2+ probes (ACa1-ACa3) are reported. They can be excited by a 780 nm laser beam, show 23-50-fold enhancement in one- and two-photon excited fluorescence in response to Ca2+, emit fourfold stronger two-photon excited fluorescence than Oregon Green 488 BAPTA-1 upon complexation with Ca2+, and can selectively detect intracellular free Ca2+ ions in live cells and living
报告了2-乙酰基-6-(二甲基氨基)萘衍生的双光子荧光Ca2 +探针(ACa1-ACa3)。它们可以被780 nm激光束激发,响应Ca2 +,在单光子和双光子激发的荧光中显示23-50倍的增强,在与Oregon Green 488 BAPTA-1络合后发射出比俄勒冈绿色488 BAPTA-1强四倍的光子Ca2 +,可以选择性地检测活细胞和活组织中的细胞内游离Ca2 +离子,而不受其他金属离子和膜结合探针的干扰最小。此外,这些探针能够使用双光子显微镜在无光漂白伪影的情况下,在1100-4000 s的时间内监测活组织中120-170微米深度的钙波。