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Pulmonary edema and ascorbic acid loss.

R J Willis, C C Kratzing

    Canadian Journal of Physiology and Pharmacology
    |December 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Pulmonary edema in mice leads to ascorbic acid loss in the lungs. This effect occurs regardless of the cause of edema, suggesting a general physiological response to lung injury.

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    Area of Science:

    • Pharmacology
    • Pulmonary Medicine
    • Biochemistry

    Background:

    • Pulmonary edema is a condition characterized by fluid accumulation in the lungs.
    • Ascorbic acid (vitamin C) plays a role in lung health and antioxidant defense.
    • Catecholamines like adrenaline and noradrenaline can influence cardiovascular and respiratory functions.

    Purpose of the Study:

    • To investigate the relationship between catecholamine-induced pulmonary edema and lung ascorbic acid levels in mice.
    • To determine the role of endogenous catecholamines and hexamethonium in modulating pulmonary edema and ascorbic acid depletion.

    Main Methods:

    • Intravenous injection of adrenaline or noradrenaline in mice to induce pulmonary edema.
    • Administration of adrenalectomy or hexamethonium prior to catecholamine challenge.

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  • Measurement of lung ascorbic acid levels and assessment of pulmonary edema severity.

    • Main Results:

    • Intravenous adrenaline or noradrenaline caused pulmonary edema and loss of lung ascorbic acid.
    • Adrenalectomy reduced the severity of noradrenaline-induced pulmonary edema.
    • Hexamethonium exacerbated pulmonary edema and, when administered alone, also caused ascorbic acid loss and edema.

    Conclusions:

    • Endogenous catecholamines can potentiate catecholamine-induced pulmonary edema but are not specifically involved in ascorbic acid loss.
    • Lung ascorbic acid levels decrease as a consequence of pulmonary edema development, irrespective of the inducing agent.
    • The findings suggest a link between lung injury from edema and reduced ascorbic acid content.