Fluorescent neuroactive probes based on stilbazolium dyes
作者:Adrienne S. Brown、Lisa-Marie Bernal、Teresa L. Micotto、Erika L. Smith、James N. Wilson
DOI:10.1039/c0ob00849d
日期:——
A set of spectrally diverse stilbazolium dyes was identified in an uptake assay using cultured brainstem and cerebellum cells isolated from e19 chicks. Pretreatment of cells with indatraline, a monoamine reuptake inhibitor, allowed identification of dyes that may interact with monoamine transporters. Two structurally related, yet spectrally segregated, probes, (E)-1-methyl-4-[2-(2-naphthalenyl)ethenyl]-pyridinium iodide (NEP+, 3A) and (E)-4-[2-(6-hydroxy-2-naphthalenyl)ethenyl]-1-methyl-pyridinium iodide (HNEP+, 4A), were selected and further investigated using HEK-293 cells selectively expressing dopamine, norepinephrine or serotonin transporters. HNEP+ was selectively accumulated viacatecholamine transporters, with the norepinephrine transporter (NET) giving the highest response; NEP+ was not transported, though possible binding was observed. The alternate modes of interaction enable the use of NEP+ and HNEP+ to image distinct cell populations in live brain tissue explants. The preference for HNEP+ accumulation viaNET was confirmed by imaging uptake in the absence and presence of desipramine, a norepinephrine reuptake inhibitor.
A ratiometric merocyanine-based fluorescent probe for detecting hydrazine in living cells and zebra fish
作者:Jinliang Han、Xiuxiu Yue、Jingpei Wang、Yun Zhang、Benhua Wang、Xiangzhi Song
DOI:10.1016/j.cclet.2020.01.029
日期:2020.6
merocyanine-based fluorescent probe, NEPB, for tracing hydrazine (N2H4) in a ratiometric manner with large Stokes shifts and long emission wavelength. The fluorescence color of probe NEPB changed from green to yellow upon addition of hydrazine. Probe NEPB displayed high selectivity and sensitivity to hydrazine in solution, and could ratiometrically monitor N2H4 in living cells and zebrafish with low cytotoxicity
Characteristic Fluorescence Response of (6-Hydroxy-2-naphthyl)ethenyl Pyridinium Dyes with Bovine Serum Albumin
作者:Myung-Seok Choi、Ankush Gupta、Jung Hwa Seo、S. Velmathi、James N. Wilson、Jong S. Park
DOI:10.1002/bkcs.10055
日期:2015.1
this study, we report the efficient identification of proteins using (6‐hydroxy‐2‐naphthyl)ethenylpyridiniumdyes (HNEPs). These dyes exhibited characteristicfluorescenceresponses, showing enhanced fluorescence with a red shift in the case of bovineserumalbumin. The nature of the interaction between the dye and the protein was examined using a combination of various spectroscopic techniques. A time‐dependent