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[Effect of bacterial endotoxin on the respiratory function of liver mitochondria]
Ukrainskii Biokhimicheskii Zhurnal (1978)
|July 1, 1988
Abstract:
It is shown that LD50 of bacterial endotoxin exerts an uncoupling effect on the mouse liver mitochondria. The effect of endotoxin is observed 3 h after its administration. Direct addition of endotoxin to isolated mitochondria has induced a rotenone-like effect and an uncoupling action when using succinate as a substrate of oxidation.
Insights
Bacterial endotoxin, at lethal doses (LD50), disrupts mouse liver mitochondria function. This uncoupling effect, observed three hours post-administration, impacts cellular respiration and energy production.
Area of Science:
- Biochemistry
- Cell Biology
- Toxicology
Context:
- Mitochondria are crucial for cellular energy production.
- Bacterial endotoxins are potent immune stimulants with known toxic effects.
- Understanding endotoxin's impact on mitochondrial function is vital for sepsis research.
Purpose:
- To investigate the effect of bacterial endotoxin on mouse liver mitochondria.
- To determine the mechanism and timing of endotoxin-induced mitochondrial dysfunction.
Summary:
- Lethal dose 50 (LD50) of bacterial endotoxin induces an uncoupling effect on mouse liver mitochondria.
- This mitochondrial uncoupling is evident three hours after endotoxin administration.
- Direct addition of endotoxin to isolated mitochondria mimics rotenone's effect, inhibiting oxidation via succinate.
Impact:
- Reveals a direct impact of bacterial endotoxins on mitochondrial bioenergetics.
- Suggests novel therapeutic targets for mitigating endotoxin-induced cellular damage.
- Provides insights into the mechanisms of sepsis-related organ dysfunction.