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ANALYSIS OF WATER CONTENT IN RAT BRAIN USING RAMAN SPECTROSCOPY Koichi Tashibu 1 1Department of Neurosurgery, The Jikei University School of Medicine Keyword: laser Raman spectroscopy , braine dema , vasogenicedema , cytotoxic edema pp.999-1004
Published Date 1990/10/1
DOI https://doi.org/10.11477/mf.1406900116

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  • Abstract
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Laser Raman spectroscopy has not been applied to brain tissue. However, this method can pos-sibly analyze the constituent elements of living tissue of cellular and molecular level easily, and this might be essential for further brain research.

I attempted to analyze the water content of brain tissues, which was measured by Raman spec-trum of CH and OH groups, in normal and edema-tous rat brain tissues. The experimental results indicated that the peak intensity of CH group originated from protein, 2935 cm-1 in wave number, was constant in normal, dried and edematous brain tissue. Therefore it could be used as internal standard.

As the peak intensity of OH group, 3390 cm-1 in wave number, was originated from water, the relative amount of water content in the brain tissues could be evaluated by OH/CH value. The OH/CH value was not significantly different be-tween the cortex and the thalamus, but it was significantly higher in the gray matter (thalamus) than in the white matter (pons). The OH/CH value was decreased in dried specimens. In ex-perimental edematous brain tissues, which was produced by intraperitoneal injection of organic tin, the OH/CH value was evidently increased in the thalamus but not much changed in the pons. This results were well compatible with cytotoxic edema, which was reported to be produced by organic tin.

It is suggested that laser Raman spectroscopy can be used for brain edema research as one of the strong weapon, in analyzing water content of brain tissues on a cellular level.


Copyright © 1990, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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