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Ethanol--its nephrotoxic effect in the rat.

D H Van Thiel, W D Williams, J S Gavaler

    The American Journal of Pathology
    |October 1, 1977
    PubMed
    Summary
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    Chronic ethanol consumption in rats significantly impairs kidney function and alters renal structure. Ethanol acts as a nephrotoxin, causing cellular injury and reduced clearance despite increased kidney size.

    Area of Science:

    • Nephrology
    • Toxicology
    • Biochemistry

    Background:

    • Ethanol (alcohol) consumption is widespread and associated with various health issues.
    • The specific impact of chronic ethanol intake on renal structure and function requires detailed investigation.

    Purpose of the Study:

    • To evaluate the nephrotoxic effects of chronic ethanol feeding on rat kidneys.
    • To compare renal structure and function in ethanol-fed rats versus control animals.

    Main Methods:

    • Rats were fed ethanol or dextrose (control) isocalorically.
    • Kidney structure and function were assessed, including mass, clearances (creatinine, osmolar), and renal constituents (protein, lipid).
    • Light and electron microscopy were used to examine kidney tissue.

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    Main Results:

    • Ethanol-fed rats exhibited larger kidneys but a 50% reduction in creatinine clearance and a 67% reduction in osmolar clearance.
    • Renal protein doubled, and renal lipid increased by 50% in ethanol-fed rats.
    • Electron microscopy revealed significant cellular injury and sloughing in renal epithelial cells of tubules and Henle's loops, indicative of tubular necrosis.

    Conclusions:

    • Chronic ethanol consumption leads to significant renal dysfunction and structural abnormalities in rats.
    • Ethanol should be recognized as a nephrotoxin due to its damaging effects on kidney structure and function.