Monitoring the uptake and redistribution of metal nanoparticles during cell culture using surface-enhanced raman scattering spectroscopy

Sirimuthu, N.M.S., Syme, C.D. and Cooper, J.M. (2010) Monitoring the uptake and redistribution of metal nanoparticles during cell culture using surface-enhanced raman scattering spectroscopy. Analytical Chemistry, 82(17), pp. 7369-7373. (doi:10.1021/ac101480t)

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Abstract

We describe the uptake of silver nanoparticles by CHO (Chinese hamster ovary) cells and their subsequent fate as a result of cell division during culture, as monitored by surface-enhanced Raman scattering (SERS) spectroscopy. Mapping of populations of cells containing both labeled and native nanoparticles by SERS spectroscopy imaging provided a quantitative method by which the number of intracellular nanoparticles could be monitored. Initially, for a given amount of nanoparticles, the relationship between the number taken up into the cell and the time of incubation was explored. Subsequently, the redistribution of intracellular nanoparticles upon multiple rounds of cell division was investigated. Intracellular SERS signatures remained detectable in the cells for up to four generations, although the abundance and intensity of the signals declined rapidly as nanoparticles were shared with daughter cells. The intensity of the SERS signal was dependent both on stability of the label and their abundance (nanoparticle aggregation increases the extent of the SERS enhancement). The data show that while the labeled nanoparticles remain stable for prolonged periods, during cell division, the changes in signal could be attributed both to a decrease in abundance and distribution (and hence aggregation)

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Syme, Dr Christopher and Cooper, Professor Jonathan
Authors: Sirimuthu, N.M.S., Syme, C.D., and Cooper, J.M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Analytical Chemistry
Publisher:American Chemical Society
ISSN:0003-2700
ISSN (Online):1520-6882
Published Online:09 August 2010

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