Coexpression of CdSe and CdSe/CdS quantum dots in live cells using molecular hyperspectral imaging technology.

Abstract

A direct spatial and spectral observation of CdSe and CdSe/CdS quantum dots (QDs) as probes in live cells is performed by using a custom molecular hyperspectral imaging (MHI) system. Water-soluble CdSe and CdSe/CdS QDs are synthesized in aqueous solution under the assistance of high-intensity ultrasonic irradiation and incubated with colon cancer cells for bioimaging. Unlike the traditional fluorescence microscopy methods, MHI technology can identify QD probes according to their spectral signatures and generate coexpression and stain titer maps by a clustering method. The experimental results show that the MHI method has potential to unmix biomarkers by their spectral information, which opens up a pathway of optical multiplexing with many different QD probes.

• Authors: Qingli Li, Hui Peng, Jing Wang, Yiting Wang, Fangmin Guo
• Journal: Journal of biomedical optics (J Biomed Opt) Vol. 20 Issue 11 Pg. 110504 (Nov 2015) ISSN: 1560-2281 [Electronic] United States
• PMID: 26588112 (Publication Type: Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Cadmium Compounds
• Selenium Compounds
• Sulfides
• cadmium sulfide
• cadmium selenide

Topics

• Cadmium Compounds (chemistry)
• Cell Line, Tumor
• Colonic Neoplasms (chemistry, pathology)
• Equipment Design
• Equipment Failure Analysis
• Humans
• Microscopy, Fluorescence, Multiphoton (instrumentation)
• Molecular Imaging (instrumentation, methods)
• Quantum Dots
• Reproducibility of Results
• Selenium Compounds (chemistry)
• Sensitivity and Specificity
• Spectrometry, Fluorescence (instrumentation, methods)
• Sulfides (chemistry)