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Decrease of hepatic mitochondrial glutathione and mitochondrial injury induced by 1,2-dibromoethane in the rat in
Abstract:
Diethylmaleate (DEM) potentiated the 1,2-dibromoethane (DBE)-induced hepatic morphological lesion in fasted male Wistar rats, as revealed by light and electron microscopy examination. The subcellular structures involved in such lesions were the mitochondria. The potentiating effect of DEM appeared to be due to enhancement of the depletion of hepatic mitochondrial glutathione (GSH) caused by DBE. DEM, however, failed to potentiate the DBE-induced release in the plasma of hepatic enzymes. The relationship between loss of mitochondrial GSH, mitochondrial injury, and the importance of the mitochondrial lesion in DBE-induced hepatotoxicity is discussed.
Insights
Diethylmaleate (DEM) enhances liver damage from 1,2-dibromoethane (DBE) by depleting mitochondrial glutathione. This leads to mitochondrial injury, a key factor in liver toxicity.
Area of Science:
- Hepatotoxicity and cellular injury mechanisms.
- Biochemistry of xenobiotic metabolism.
- Mitochondrial function and oxidative stress.
Background:
- 1,2-dibromoethane (DBE) is a known hepatotoxin.
- Glutathione (GSH) depletion is implicated in xenobiotic-induced liver injury.
- Mitochondria are critical targets in toxic insults.
Purpose of the Study:
- To investigate the potentiating effect of Diethylmaleate (DEM) on DBE-induced hepatic lesions.
- To identify the subcellular structures involved in DEM-DBE hepatotoxicity.
- To elucidate the role of mitochondrial glutathione (GSH) in this potentiation.
Main Methods:
- Male Wistar rats were fasted and treated with DEM and/or DBE.
- Light and electron microscopy were used to examine hepatic morphology.
- Hepatic mitochondrial glutathione (GSH) levels and plasma hepatic enzymes were measured.
Main Results:
- DEM potentiated DBE-induced hepatic morphological lesions.
- Mitochondria were identified as the primary subcellular structures affected.
- DEM enhanced DBE-induced depletion of mitochondrial GSH.
- DEM did not potentiate the release of hepatic enzymes into plasma.
Conclusions:
- DEM potentiation of DBE hepatotoxicity is linked to enhanced mitochondrial GSH depletion.
- Mitochondrial injury, driven by GSH loss, is crucial in DBE-induced liver damage.
- The findings highlight the importance of mitochondrial integrity in preventing xenobiotic-induced hepatotoxicity.