Glutathione S-transferase in human organs

Sherman, M.; Titmuss, S.; Kirsch, R.E.

Biochemistry International 6(1): 109-118

1983


ISSN/ISBN: 0158-5231
PMID: 6679314
Document Number: 217219
Glutathione S-transferase (GSH-T) distribution has been investigated in human tissues. The relative contribution of each species to total enzyme activity of the various tissues has been compared. "Cationic" (pI greater than 7.5) "neutral" (pI 6-6.5) and "anionic" (pI less than 5.4) species of GSH-T were separated by isoelectric focusing. "Cationic" GSH-Ts (ligandin) quantitated by radioimmunoassay were present in all tissues studied. Highest concentrations were in liver, kidney, duodenum, testis and adrenal. "Neutral" and "anionic" GSH-Ts were not present in every tissue or in every specimen of some tissues studied. Marked inter-organ and inter-individual variation in the relative concentration of the 3 GSH-T species may explain individual and organ susceptibility to drugs and toxins and underlines the need for future studies to examine individual enzymes rather than total activity.

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