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Related Experiment Videos

Hepatic fat accumulation during liver regeneration.

T A Stein, G P Burns, B E Tropp

    The Journal of Surgical Research
    |October 1, 1985
    PubMed
    Summary

    During liver regeneration after partial hepatectomy, microsomal sn-glycerol 3-phosphate acyltransferase activity significantly increases. This enzyme plays a key role in promoting triglyceride synthesis in the regenerating liver.

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    Area of Science:

    • Hepatology
    • Molecular Biology
    • Biochemistry

    Background:

    • Fat accumulation is observed in the liver during regeneration following partial hepatectomy.
    • Intracellular acyltransferases are critical enzymes in triglyceride synthesis.

    Purpose of the Study:

    • To investigate the role of intracellular acyltransferases in hepatic triglyceride synthesis during liver regeneration.
    • To determine the specific enzyme responsible for increased triglyceride levels post-hepatectomy.

    Main Methods:

    • Partial hepatectomy was performed on rats, with a sham operation control group.
    • Microsomal, mitochondrial, and peroxisomal enzyme activities were measured at 18 and 24 hours post-operation.
    • Triglyceride content and enzyme specific activities were quantified.

    Main Results:

    • Microsomal sn-glycerol 3-phosphate acyltransferase activity significantly increased at 18 and 24 hours post-hepatectomy, correlating with elevated triglyceride levels.
    • Mitochondrial enzyme activity showed no significant change.
    • Peroxisomal dihydroxyacetone acyltransferase activity increased but did not correlate with triglyceride content.

    Conclusions:

    • Microsomal sn-glycerol 3-phosphate acyltransferase activity is a major determinant of triglyceride synthesis during liver regeneration.
    • The study highlights the specific role of this microsomal enzyme in the metabolic adaptation of the regenerating liver.

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