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Alcohol: its effect on the kidney.

D H Van Thiel, J S Gavaler, J M Little

    Metabolism: Clinical and Experimental
    |August 1, 1977
    PubMed
    Summary
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    Ethanol consumption impairs kidney function and causes edema in rats. However, alcohol-fed rats exhibit renal hypertrophy with increased protein, fat, and water content per kidney.

    Area of Science:

    • Nephrology
    • Toxicology
    • Animal Studies

    Background:

    • Ethanol (alcohol) consumption is a global health concern with known systemic effects.
    • The specific impact of chronic ethanol intake on renal structure and function requires further elucidation.

    Purpose of the Study:

    • To investigate the effects of chronic ethanol feeding on rat kidney function, morphology, and composition.
    • To compare these effects against isocaloric dextrimaltose feeding to isolate ethanol's impact.

    Main Methods:

    • Rats were fed diets containing either ethanol or isocaloric dextrimaltose.
    • Renal function, gross and microscopic morphology, and tissue constituent analysis (protein, fat, water, DNA) were performed.
    • Analyses were normalized for body weight and renal mass.

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    Main Results:

    • Alcohol-fed rats showed significantly reduced renal function and interstitial edema compared to controls.
    • Despite reduced function, alcohol-fed rats exhibited renal hypertrophy.
    • Absolute amounts of renal protein, fat, and water significantly increased in alcohol-fed rats (p < 0.01).
    • DNA content per kidney remained similar between groups, suggesting cell proliferation was not the primary driver of hypertrophy.

    Conclusions:

    • Chronic ethanol consumption leads to detrimental changes in renal function and morphology, including edema.
    • Ethanol induces renal hypertrophy characterized by increased protein, fat, and water accumulation, independent of overall body weight changes.
    • The observed hypertrophy is not solely due to increased cell proliferation (DNA content).