Inhibition of hepatic glutathione S-transferases by a major endogenous ligand substance present in uremic serum.

A major endogenous ligand substance present in uremic serum, 3-carboxy-4-methyl-5-propyl-2-furanpropanoic acid, inhibited the in vitro activity of bovine and rat liver glutathione S-transferases. Our results suggested that endogenous ligand substances retained in uremic serum have some toxic activities other than the inhibition of drug binding to serum protein observed in uremia.