Related Experiment Videos
Glutathione S-transferase in human organs
Biochemistry International
|January 1, 1983
Summary
Human tissues show varied levels of glutathione S-transferase (GSH-T) enzymes. This variation in cationic, neutral, and anionic GSH-T species may influence susceptibility to toxins.
Area of Science:
- Biochemistry
- Human Physiology
- Enzymology
Background:
- Glutathione S-transferases (GSH-Ts) are crucial enzymes involved in detoxification.
- Understanding the distribution of different GSH-T species in human tissues is vital for assessing cellular defense mechanisms.
Purpose of the Study:
- To investigate the distribution and relative contribution of various glutathione S-transferase (GSH-T) species in different human tissues.
- To compare the concentrations of cationic, neutral, and anionic GSH-T forms across various organs.
Main Methods:
- Isoelectric focusing was employed to separate cationic (pI > 7.5), neutral (pI 6-6.5), and anionic (pI < 5.4) GSH-T species.
- Radioimmunoassay was utilized to quantify the concentrations of cationic GSH-Ts (ligandin).
Main Results:
- Cationic GSH-Ts (ligandin) were detected in all investigated human tissues, with the highest concentrations found in the liver, kidney, duodenum, testis, and adrenal glands.
- Neutral and anionic GSH-T species exhibited significant inter-organ and inter-individual variability, not being present in all tissues or specimens.
Conclusions:
- The differential distribution and concentration of GSH-T species suggest a basis for organ-specific and individual susceptibility to xenobiotics.
- Future research should focus on individual GSH-T enzymes rather than total enzyme activity to better understand drug and toxin metabolism.