Analysis on intensities and profile of Raman spectroscopy for CNE1 and CNE2

Abstract

Raman spectroscopy (RS) has proved to be very effective in tracing the distribution of biological molecules within nasopharyngeal carcinoma (NPC) cells. In this paper, the representative radiotherapy model of NPC cell lines CNE1 and CNE2 were measured by Raman spectroscopy in the range of 750-3000cm -1 . The scatter plots of intensity ratios of protein, lipid, and nucleic acids showed some overlap using some Raman markers. The spectral data were further evaluated using 19 intensities data set (selected intensity points) and the whole spectra data set (whole intensity points) by principal component analysis and linear discriminate analysis, yielding a diagnostic accuracy of 78% (56/72) and of 94% (68/72) to differentiate the two NPC cell lines, respectively. Our findings suggested that the whole Raman spectra are more optimistic accuracies than selected intensities for diagnosing the NPC cell lines and the information in the shape of RS could be further revealed by intensities.