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Related Experiment Videos

Histamine biosynthesis in shock

M J Galvin, O R Bunce, S M Reichard

    Circulatory Shock
    |January 1, 1977
    PubMed
    Summary

    Trauma resistance in rats prevents increased histidine decarboxylase activity in the lung and spleen. A humoral factor associated with the reticuloendothelial system (RES) may inhibit this enzyme activation post-trauma.

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    Area of Science:

    • Biochemistry
    • Physiology
    • Immunology

    Background:

    • Trauma significantly increases histidine decarboxylase (HDC) activity in normal animals.
    • The role of HDC in trauma response and potential regulatory mechanisms are not fully understood.

    Purpose of the Study:

    • To investigate the effect of trauma resistance on HDC activity in rat lung and spleen.
    • To identify potential humoral factors involved in modulating the post-traumatic HDC response.

    Main Methods:

    • Assessing HDC activity in lung and spleen of rats subjected to trauma.
    • Comparing enzyme activity in normal, trauma-resistant, and extract-treated rats.
    • Investigating the role of spleen and plasma extracts from trauma-resistant rats.

    Main Results:

    • Normal rats showed increased HDC activity post-trauma.
    • Trauma-resistant rats exhibited prevented or reduced HDC activity changes.
    • Extracts from trauma-resistant rats mimicked the protective effect.

    Conclusions:

    • Trauma resistance confers protection against elevated HDC activity.
    • A humoral factor, potentially linked to the reticuloendothelial system (RES), may inhibit HDC activation post-trauma.

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