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J Biomed Opt. 2015 Nov;20(11):110504. doi: 10.1117/1.JBO.20.11.110504.

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

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East China Normal University, Shanghai Key Laboratory of Multidimensional Information Processing, No. 500, Dongchuan Road, Shanghai 200241, China.
East China Normal University, Institutes for Advanced Interdisciplinary Research, No. 3663, Zhoangshan Road (N), Shanghai 200062, China.


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.

[Indexed for MEDLINE]

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