Issue 37, 2017

FTIR-spectroscopic and LA-ICP-MS imaging for combined hyperspectral image analysis of tumor models

Abstract

Modern chemical imaging techniques provide spatially resolved information on the molecular and elemental composition of samples with both high spatial and spectral resolution. Over the past few decades these techniques, in particular, Fourier transform infrared (FTIR) spectroscopy and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) have been successfully applied in histopathological research. This work demonstrates that the multivariate analysis of combined FTIR and LA-ICP-MS microscopy hyperspectral images can bring additional knowledge to biomedical research. The concept of such analysis was demonstrated while investigating two different tumor samples subjected to anticancer therapy. Combined analysis has revealed a correlation between the lateral distribution of analytes and sample properties within the different techniques. Correlations between alterations in the average protein secondary structure and platinum distribution were found, as well as between changes in the cell nuclear morphology and a reduction of physiologically relevant trace elements. The results of combined analysis suggested different degrees of tumor viability. Univariate analysis and k-means clustering successfully discriminated dead tumor regions and supported the results of combined analysis.

Graphical abstract: FTIR-spectroscopic and LA-ICP-MS imaging for combined hyperspectral image analysis of tumor models

Supplementary files

Article information

Article type
Paper
Submitted
01 Jun 2017
Accepted
22 Aug 2017
First published
23 Aug 2017
This article is Open Access
Creative Commons BY license

Anal. Methods, 2017,9, 5464-5471

FTIR-spectroscopic and LA-ICP-MS imaging for combined hyperspectral image analysis of tumor models

A. Balbekova, M. Bonta, S. Török, J. Ofner, B. Döme, A. Limbeck and B. Lendl, Anal. Methods, 2017, 9, 5464 DOI: 10.1039/C7AY01369H

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