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Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.
Generation and detection of hydroxyl radical in vivo in rat spinal cord by microdialysis administration of Fenton's reagents and microdialysis sampling.
Journal of Biochemical and Biophysical Methods 1993 December
We developed a double microdialysis fiber technique to generate hydroxyl radicals (OH.) in rat spinal cord. H2O2 and FeCl2/EDTA were pumped through two parallel microdialysis fibers inserted into the spinal cord such that the reactants mix in the tissue to generate OH. by the Fenton reaction. Generated OH. was detected by administering phenylalanine through one fiber and measuring o-, m- and p-hydroxyphenylalanine in collected dialysates by high pressure liquid chromatography and fluorescence detection. The hydroxyphenylalanines are produced by OH. attacking the phenylalanine. OH. generation was also accomplished in in vitro experiments and the results were consistent with in vivo experiments. This novel method to generate and measure OH. radical in vivo overcomes difficulties in studying damage to tissue by short-lived OH.. Although developed to study the role of OH. in spinal cord injury, this method could be used to study other diseases involving OH. damage.
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