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Lipid peroxidation and lipolysis during fasting.

M Rejholcová, J Wilhelm

    Acta Universitatis Carolinae. Medica
    |January 1, 1989
    PubMed
    Summary
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    Fasting increases lipid peroxidation, indicated by lipofuscin-like pigments (LFP), which reduces fat breakdown (lipolysis) in rats. These findings may inform studies on fasting in obese patients.

    Area of Science:

    • Biochemistry
    • Metabolic Research
    • Animal Physiology

    Background:

    • Fasting significantly impacts metabolic processes.
    • Lipid peroxidation is a marker of oxidative stress.
    • Adipose tissue metabolism, particularly lipolysis, is crucial for energy balance.

    Purpose of the Study:

    • To investigate lipid peroxidation during fasting.
    • To determine the effects of fasting on adipose tissue metabolism and lipolytic activity.
    • To explore correlations between lipid peroxidation markers and lipolysis.

    Main Methods:

    • Utilized a male rat animal model.
    • Measured lipofuscin-like pigments (LFP) as an indicator of lipid peroxidation.
    • Assessed hormone-sensitive lipase activity to quantify lipolysis.

    Related Experiment Videos

  • Analyzed LFP and lipolysis in plasma, liver, and adipose tissue over time and across feeding-fasting cycles.

    • Main Results:

    • Increased LFP levels correlated with decreased hormone-sensitive lipase activity.
    • LFP accumulation was observed in plasma, liver, and adipose tissue.
    • Changes in LFP and lipolysis were inversely related during repeated fasting-feeding cycles.
    • Lipolytic activity was influenced by initial body mass, age, and feeding patterns.

    Conclusions:

    • Fasting induces lipid peroxidation, leading to reduced lipolytic activity.
    • Initial body mass, age, and feeding regimen are key factors affecting lipolysis.
    • The study's methods are applicable to investigating fasting effects in obese human patients.