The cellular uptake ofMPFCP-2is improved by the PEG encapsulation method, and thenMPFCP-2could pass through the cell membrane by itself, and monitor the changes of the intracellular Ca2+signal.
Two-photon excited fluorescent probes for calcium based on internal charge transfer
作者:Xiaohu Dong、Yiyao Yang、Jian Sun、Zhihong Liu、Bi-Feng Liu
DOI:10.1039/b905571a
日期:——
Two-photon excited (TPE) calcium fluorescent probes are designed and synthesized based on internal charge transfer (ICT) with high Ca2+ affinity and large two-photon action cross section, which can be used in living cells and detected with two-photon microscopy (TPM).
This paper describes a new series of organometallic water-soluble chelators combining a redox moiety (ferrocene) and a selective Ca2+ chelator (BAPTA) separated by an ethynyl bridge. We report the synthesis and characterization of organometallic derivatives of the BAPTA chelator featuring one (2a) and two ferrocenyl (2b) moieties. Single crystal X-ray structural analysis on these chelators revealed unexpected
The combination of a ferrocenyl moiety with BAPTA provides a novel, water-soluble, redox-active chelator. This chelator behaving as a conformational sensor exhibits an unexpected electrochemical response with high affinity and selectivity for calcium.
through conjugation to HaloTag fusion proteins. Importantly, their increase in fluorescence upon localization enables no-wash live-cell imaging, which greatly facilitates their use in biological assays. Applications as fluorescent indicators in rat hippocampal neurons include the detection of single action potentials and of calcium fluxes in the endoplasmic reticulum. Applications as bioluminescent indicators