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Related Experiment Videos

Tantalum oxide and alveolar macrophage function

R A Matthay, C E Putman, J B Gee

    Investigative Radiology
    |May 1, 1977
    PubMed
    Summary

    Alveolar macrophages (AMs) can clear tantalum oxide particles from the lungs. In vitro studies show AMs phagocytose tantalum without harm, enhancing glucose oxidation, suggesting a key role in lung clearance.

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    Area of Science:

    • Pulmonary toxicology
    • Cell biology
    • Respiratory medicine

    Background:

    • Bronchography procedures utilize tantalum for imaging.
    • Alveolar macrophages (AMs) are critical for lung defense and clearance.
    • The fate of tantalum particles in the lungs requires investigation.

    Purpose of the Study:

    • To investigate the short-term effects of tantalum oxide on rabbit AM viability and metabolism.
    • To determine if AMs can phagocytose tantalum oxide particles.
    • To assess the impact of tantalum oxide exposure on AM metabolic activity.

    Main Methods:

    • Primary rabbit AMs were isolated.
    • Tantalum oxide particles were introduced to AM cultures in vitro.
    • Cell viability assays were performed.

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  • Glucose oxidation rates were measured.

    • Main Results:

    • Rabbit AMs successfully phagocytosed tantalum oxide particles.
    • No significant cytotoxicity was observed in AMs exposed to tantalum oxide.
    • A significant increase in glucose oxidation was detected in AMs after particle uptake.

    Conclusions:

    • Alveolar macrophages demonstrate a capacity to phagocytose tantalum oxide particles without adverse effects.
    • Enhanced glucose oxidation suggests an active metabolic response by AMs to tantalum oxide.
    • These findings support the role of AMs as a primary mechanism for tantalum clearance from the respiratory tract.