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Ultrastructural defects of respiratory tract cilia associated with chronic infections

J T Howell, S S Schochet, A S Goldman

    Archives of Pathology & Laboratory Medicine
    |January 1, 1980
    PubMed

    Insights

    This study found severe defects in the cilia of a young boy, leading to reduced motility. These abnormalities likely caused his recurrent respiratory infections due to impaired mucociliary transport.

    Area of Science:

    • Cell Biology
    • Respiratory Medicine
    • Genetics

    Background:

    • Recurrent respiratory infections can stem from underlying ciliary dysfunction.
    • Understanding ciliary ultrastructure is crucial for diagnosing motile cilia disorders.

    Observation:

    • A 12-year-old boy presented with chronic upper and lower respiratory tract infections.
    • Nasal and bronchial cilia were examined using electron microscopy.

    Findings:

    • Ultrastructural analysis revealed numerous ciliary defects, including missing dynein arms and microtubule disorientation.
    • Abnormalities such as compound cilia and excess cytoplasmic matrix were observed.
    • The central microtubule orientation showed significant variation, indicating disorientation.

    Implications:

    • These ciliary defects likely result in markedly decreased ciliary motility.
    • Defective mucociliary transport is strongly implicated as the cause of the patient's repeated infections.
    • This case highlights the importance of ultrastructural examination in diagnosing ciliary motility disorders.

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