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

Organic acids or urine in multiple sclerosis.

The urinary excretion of organic acids was examined in 509 cases with multiple sclerosis and in 50 age- and sex-matched controls. The concentrations of the acids were related to creatinine. No differences were found for compounds such as glycolic acid, 2-methyl-3-hydroxybutyric acid, 2-ethylhydracrylic acid, 4-hydroxyphenylacetic acid, suberic acid and many other acids. However, the mean excretion of 2-hydroxy-2-methyl-3-butenoic acid was increased two-fold in the MS group. 2 MS cases had a very high excretion of 3-methylglutaconic acid, and another 6 cases had moderate elevations, which were fairly constant over a time period of several months. Moderate elevations were also noted in 2 healthy controls. 1 MS case had a very high excretion of 3-hydroxyisovaleric acid. 7 MS cases, and none in the control group, had elevated excretion of adipic acid. Differences were also noted for lactic acid, succinic acid, aconitic acid and 3-methyladipic acid. An oral dose of deuterium-labelled acetate was given to one of the patients with high excretion of 3-methylglutaconic acid. Deuterium was incorporated into this metabolite. 3-methylglutaconic acid, 2-hydroxy-2-methyl-3-butenoic acid, 3-hydroxy-isovaleric acid and 3-methyladipic acid are all potential isoprenoid metabolites. A possible defect in the pathway of isoprenoid biosynthesis is discussed.[1]

References

  1. Organic acids or urine in multiple sclerosis. Steen, G., Ransnäs, L. Acta neurologica Scandinavica. (1983) [Pubmed]
 
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