Issue 40, 2018

Label free localization of nanoparticles in live cancer cells using spectroscopic microscopy

Abstract

Gold nanoparticles (GNPs) have become essential tools used in nanobiotechnology due to their tunable plasmonic properties and low toxicity in biological samples. Among the available approaches for imaging GNPs internalized by cells, hyperspectral techniques stand out due to their ability to simultaneously image and perform spectral analysis of GNPs. Here, we present a study utilizing a recently introduced hyperspectral imaging technique, live-cell PWS, for the imaging, tracking, and spectral analysis of GNPs in live cancer cells. Using principal components analysis, the extracellular or intracellular localization of the GNPs can be determined without the use of exogenous labels. This technique uses wide-field white light, assuring minimal toxicity and suitable signal-to-noise ratio for spectral and temporal resolution of backscattered signal from GNPs and local cellular structures. The application of live-cell PWS introduced here could make a great impact in nanomedicine and nanotechnology by giving new insights into GNP internalization and intracellular trafficking.

Graphical abstract: Label free localization of nanoparticles in live cancer cells using spectroscopic microscopy

Supplementary files

Article information

Article type
Paper
Submitted
13 Sep 2018
Accepted
30 Sep 2018
First published
01 Oct 2018

Nanoscale, 2018,10, 19125-19130

Label free localization of nanoparticles in live cancer cells using spectroscopic microscopy

G. L. C. Spicer, L. Almassalha, I. A. Martinez, R. Ellis, J. E. Chandler, S. Gladstein, D. Zhang, T. Nguyen, S. Feder, H. Subramanian, R. de la Rica, S. A. Thompson and V. Backman, Nanoscale, 2018, 10, 19125 DOI: 10.1039/C8NR07481J

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