Micro-competition system for Raman quantification of multiple glycans on intact cell surface.

Micro-competition system for Raman quantification of multiple glycans on intact cell surface.
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DOI:
10.1039/c5sc01031d
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发表时间:
2015-07-01
期刊:
影响因子:
8.4
通讯作者:
Ju H
Ju H
中科院分区:
化学1区
文献类型:
--
作者:
Chen Y;Ding L;Xu J;Song W;Yang M;Hu J;Ju H

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微竞争系统集成了功能化的二氧化硅气泡和拉曼编码的纳米探针,以同时测定完整细胞表面上的多种聚糖。设计了一个微竞争系统,通过整合两个表面一个分子的竞争与表面增强拉曼散射(Sers)的同时定量完整的细胞表面上的多个聚糖。在微米尺度上实现了多个多糖包覆的金纳米星功能化的二氧化硅泡、靶细胞和金纳米探针之间的微观竞争。通过在金纳米颗粒上涂覆不同的拉曼分子和凝集素来制备金纳米探针,分别用于信号分辨和聚糖识别。二氧化硅泡表面用作人工聚糖表面和Sers基底。当凝集素与相应的聚糖竞争性识别时,金纳米探针可以被均匀体系中的气泡和细胞特异性捕获,并且Sers同时检测气泡上不同金纳米探针的量以反映细胞表面上相应聚糖的量。这种具有多重定量能力的微竞争系统为研究与聚糖相关的复杂生物过程提供了强有力的工具。
A micro-competition system integrated functionalized silica bubbles and Raman encoded nanoprobes to simultaneously assay multiple glycans on intact cell surfaces. A micro-competition system is designed for simultaneous quantification of multiple glycans on intact cell surfaces, by integrating two-surface–one-molecule competition with surface enhanced Raman scattering (SERS). The micro-competition is achieved among multiple-polysaccharide-coated gold nanostars functionalized silica bubbles, target cells and gold nanoprobes at a micron scale. The gold nanoprobes are prepared by coating distinct Raman molecules and lectins on gold nanoparticles for signal resolution and glycan recognition, respectively. The silica bubble surface serves as an artificial glycan surface and a SERS substrate. Upon the competitive recognition of lectin to the corresponding glycan, the gold nanoprobes can be specifically captured by the bubbles and cells in a homogeneous system, and the amounts of different gold nanoprobes on bubbles are simultaneously detected by SERS to reflect the corresponding glycan amounts on the cell surface. This micro-competition system with multiple quantification capability provides a powerful tool for investigation of the complex glycan-related biological processes.
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