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Experimental copper deficiency in laboratory mice

S A Kincaid, W W Carlton

    Laboratory Animal Science
    |October 1, 1982
    PubMed
    Summary

    Copper deficiency in mice caused severe health issues, including growth retardation, anemia, and cardiac problems like enlargement and rupture. This highlights the critical role of copper in maintaining cardiovascular and overall health.

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    Area of Science:

    • Biochemistry
    • Cardiovascular Physiology
    • Animal Models

    Background:

    • Copper is an essential trace element vital for numerous physiological processes.
    • Copper deficiency can lead to a range of health impairments, particularly affecting the cardiovascular system.
    • Understanding the specific pathological outcomes of copper deficiency is crucial for nutritional science.

    Purpose of the Study:

    • To investigate the physiological and pathological effects of copper deficiency in weanling mice.
    • To document the clinical signs and necropsy findings associated with copper-deficient diets.
    • To examine the cardiac histopathology in copper-deficient animal models.

    Main Methods:

    • Weanling C57BL/6J and Hap:(ICR) mice were fed a milk-sucrose based diet lacking adequate copper.
    • The diet was supplemented with essential vitamins, minerals, and amino acids, excluding copper.
    • Clinical observations, hematocrit measurements, and post-mortem examinations (necropsy and histopathology) were performed.

    Main Results:

    • Copper-deficient mice exhibited growth retardation, lethargy, dyspnea, and decreased hematocrit.
    • Achromotrichia (loss of hair pigment) and high mortality rates were observed, particularly in ICR mice.
    • Necropsy revealed cardiac enlargement, hemopericardium, hemothorax, and pleural effusion.
    • Histopathology showed myocardial degeneration, necrosis, thrombosis, and myocardial rupture in affected mice.

    Conclusions:

    • Copper deficiency in mice leads to severe systemic effects, prominently impacting cardiovascular integrity.
    • The observed cardiac pathologies, including rupture and thrombosis, underscore the critical role of copper in myocardial health.
    • This study provides a detailed account of the pathological consequences of copper deficiency, reinforcing its importance in animal physiology and nutrition.

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