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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

In vivo on-line detection of no distribution in endotoxin-treated mice by l-band ESR.

The report describes a method for tracing nitric oxide (NO) distribution in endotoxin-treated mice using in vivo low-frequency L-band (1.1 GHz) electron spin resonance spectroscopy (ESR) in combination with extracellular nitric oxide trapping complex consisting of N-methyl-D-glucamine dithiocarbamate and iron (MGD-Fe). An ESR signal characteristic of the MGD-Fe-NO complex was found in the upper abdomen (liver region), lower abdomen and head region of ICR mice. The origin of NO from the L-arginine-NO synthase (NOS) pathway was confirmed using the NOS inhibitor N(G)-monomethyl-L-arginine (NMMA) and isotopic tracing experiments with 15N-labelled L-arginine. Experiments with mice lacking inducible NOS (iNOS) and matched wild type animals were performed using the NO trapping agent diethyldithiocarbamate (DETC). These experiments demonstrated that endotoxin-induced NO generation in the liver tissue of mice occurs via the iNOS isoform of NOS. The described in vivo ESR technique using a "whole body" resonator allows in vivo on-line detection of endogenous NO in mice.[1]

References

  1. In vivo on-line detection of no distribution in endotoxin-treated mice by l-band ESR. Komarov, A.M. Cell. Mol. Biol. (Noisy-le-grand) (2000) [Pubmed]
 
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