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Related Experiment Videos

Arginase activity during pregnancy and lactation.

X Remesar, L Arola, A Palou

    Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
    |September 1, 1984
    PubMed
    Summary

    Pregnancy and lactation increase arginase enzyme activity in rat organs, but not plasma urea levels. These changes correlate with diet, nitrogen metabolism, and hormones.

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    Area of Science:

    • Physiology
    • Biochemistry
    • Animal Science

    Background:

    • Arginase plays a key role in urea synthesis and amino acid metabolism.
    • Physiological states like pregnancy and lactation involve significant metabolic adjustments.

    Purpose of the Study:

    • To investigate arginase activity in various rat tissues and plasma during late pregnancy and lactation.
    • To correlate observed arginase activity changes with metabolic and hormonal shifts.

    Main Methods:

    • Enzyme assays were performed on liver, kidney, small intestine, and stomach tissues.
    • Plasma urea levels were measured.
    • Data were analyzed in the context of known physiological changes during pregnancy and lactation.

    Main Results:

    • Arginase activity significantly increased in the liver, kidney, small intestine, and stomach during late pregnancy and weaning.
    • Plasma urea levels did not show a corresponding increase, indicating altered nitrogen handling.
    • Changes in enzyme activity were linked to dietary intake, nitrogen metabolism, and hormonal fluctuations.

    Conclusions:

    • Pregnancy and lactation induce tissue-specific increases in arginase activity in rats.
    • The observed pattern suggests a complex adaptation of nitrogen metabolism during these reproductive stages.
    • Hormonal and dietary factors likely modulate arginase activity to meet metabolic demands.

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