Abstract
In order to obtain unique information of the single gastric cancer cell and investigate gastric cancer further at the cellular and subcellular level, synchrotron infrared (SR-IR) microspectroscopy and imaging was used to study human gastric adenocarcinoma cell line SGC7901 and normal gastric mucosal epithelial cell line GES1. When we compared the infrared micro-spectra of the SGC7901 cells with those of the GES1 cells, the peak height ratios of 1121 cm −1/1020 cm −1 (RNA/DNA) of the SGC7901 cells were significantly higher than those of the GES1 cells, which might be useful for distinguishing malignant cells from normal cells. Furthermore, chemical imaging reveals that the amide II/the amide I ratio of the SGC7901 cell is lower than that of the GES1 cell in the most intense absorption region of v as PO 2 - . The result indicates the study of the single gastric cancer cell at subcellular level by synchrotron infrared microspectroscopy and imaging can provide more detailed information which is very helpful for the research and diagnosis of gastric cancer.
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