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Issue 10, 2004
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Analysis of human brain tissue, brain tumors and tumor cells by infrared spectroscopic mapping

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Abstract

This study uses infrared (IR) spectroscopic, point detection, mapping procedures to examine tissue samples from normal brain specimens and from astrocytic gliomas, the most frequent human brain tumors. Model systems were derived from cultured glioma cell lines. IR spectra of normal tissue sections distinguished white matter from gray matter by increased spectral contributions from lipids and cholesterol. Qualitatively the same differences were found in IR spectra of low and high grade glioma tissue sections pointing to a significant reduction of brain lipids with increasing malignancy. Whereas spectral contributions of proteins and lipids were similar in IR spectra of glioma cells and tissues, nucleic acid bands were more intense for cells suggesting higher proliferative activities. For statistical analyses of IR spectroscopic maps from 71 samples, a parameter for the lipid to protein ratio was introduced involving the CH2 symmetric stretch band with lipids as main contributors and the amide I band of proteins. As this parameter correlated with the grade of gliomas obtained from standard histopathological examination, it was applied to classify brain tissue sections based on IR spectroscopic mapping.

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Publication details

The article was received on 06 Apr 2004, accepted on 29 Jun 2004 and first published on 04 Aug 2004


Article type: Paper
DOI: 10.1039/B408934K
Citation: Analyst, 2004,129, 921-925
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    Analysis of human brain tissue, brain tumors and tumor cells by infrared spectroscopic mapping

    C. Krafft, S. B. Sobottka, G. Schackert and R. Salzer, Analyst, 2004, 129, 921
    DOI: 10.1039/B408934K

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