High-Efficiency in Vitro and in Vivo Detection of Zn<sup>2+</sup> by Dye-Assembled Upconversion Nanoparticles
作者:Juanjuan Peng、Wang Xu、Chai Lean Teoh、Sanyang Han、Beomsue Kim、Animesh Samanta、Jun Cheng Er、Lu Wang、Lin Yuan、Xiaogang Liu、Young-Tae Chang
DOI:10.1021/ja5115248
日期:2015.2.18
Development of highly sensitive and selective sensing systems of divalent zinc ion (Zn2+) in organisms has been a growing interest in the past decades owing to its pivotal role in cellular metabolism, apoptosis, and neurotransmission. Herein, we report the rational design and synthesis of a Zn2+ fluorescent-based probe by assembling lanthanide-doped upconversion nanoparticles (UCNPs) with chromophores. Specifically, upconversion luminescence (UCL) can be effectively quenched by the chromophores on the surface of nanoparticles via a fluorescence resonant energy transfer (FRET) process and subsequently recovered upon the addition of Zn2+, thus allowing for quantitative monitoring of Zn2+. Importantly, the sensing system enables detection of Zn2+ in real biological samples. We demonstrate that this chromophoreUCNP nanosystem is capable of implementing an efficient in vitro and in vivo detection of Zn2+ in mouse brain slice with Alzheimers disease and zebrafish, respectively.