Furosemide toxicity in isolated mouse hepatocyte suspensions

Area of Science:

• Hepatotoxicity and cellular injury mechanisms
• Drug-induced liver injury research
• Biochemical toxicology

Background:

• Furosemide is a widely used diuretic.
• Hepatotoxicity is a potential adverse effect of some drugs.
• Understanding drug mechanisms of toxicity is crucial for patient safety.

Purpose of the Study:

• To investigate the effects of furosemide on mouse hepatocytes.
• To elucidate the role of cellular sulfhydryls in furosemide-induced hepatotoxicity.
• To evaluate the protective potential of N-Acetylcysteine.

Main Methods:

• Incubation of isolated mouse hepatocytes with varying concentrations of furosemide.
• Measurement of cellular acid soluble sulfhydryls.
• Lactate dehydrogenase latency test for cell viability.
• Transmission electron microscopy for ultrastructural analysis.
• Assessment of N-Acetylcysteine's protective effects.

Main Results:

• Furosemide (0.5-1.0 mM) significantly depleted cellular sulfhydryls.
• Reduced cell viability was observed, particularly at 0.5 mM furosemide.
• Ultrastructural analysis revealed cytoplasmic and cell surface damage.
• N-Acetylcysteine (6.0 mM) effectively prevented furosemide-induced sulfhydryl depletion, viability loss, and ultrastructural changes.

Conclusions:

• Furosemide induces hepatotoxicity in mouse hepatocytes.
• Depletion of cellular sulfhydryls plays a significant role in furosemide-induced liver injury.
• N-Acetylcysteine demonstrates a protective effect, suggesting therapeutic potential.