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Biochem Biophys Res Commun. 1990 Nov 15;172(3):1342-8.

In vivo ESR measurement of free radicals in whole mice.

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Department of Health Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan.


The in vivo measurement of nitroxide radicals in whole mouse was carried out by L-band ESR spectroscopy. Spectra were successively observed in hepatic and bladder domains of female mice after intravenous administration of spin-labeled compounds (CPROXYL or TEMPOL). The signal intensities from both domains decreased gradually. The kinetic constants of clearance in the hepatic domain were 0.09/min for CPROXYL and 0.71/min for TEMPOL. The clearance constants in the bladder domain coincided with those in the hepatic domain within experimental error, whereas the constants in collected blood were 1/7-1/10 of those in the hepatic or bladder domains. The mechanism of clearance of nitroxide radicals in whole mice is discussed.

[Indexed for MEDLINE]

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