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Serum proteins agglutinate cilia and modify ciliary coordination

M J Sanderson, M A Sleigh

    Pediatric Research
    |March 1, 1981
    PubMed
    Summary

    Sea mussel cilia assays reveal that various animal sera, not just human, alter ciliary function by causing agglutination. This effect, linked to serum immunoglobulins, is not specific to cystic fibrosis.

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    Area of Science:

    • Biochemistry
    • Marine Biology
    • Immunology

    Background:

    • Ciliary function is crucial for biological processes.
    • Previous research has explored factors affecting ciliary activity.
    • The role of serum components in modulating ciliary function requires further investigation.

    Purpose of the Study:

    • To quantify the effects of human and animal sera on the ciliary function of the sea mussel Mytilus edulis.
    • To investigate the mechanism of serum-induced ciliary alteration.
    • To determine if the observed effects are specific to certain conditions like cystic fibrosis.

    Main Methods:

    • Development of a quantifiable assay using Mytilus edulis lateral cilia.
    • Exposure of cilia to various human and animal sera.
    • Observation and measurement of changes in ciliary metachrony, beat frequency, and wavelength.
    • Parallel studies using rabbit tracheal cilia assay.
    • Investigation of serum dilution effects and the role of immunoglobulin fractions.

    Main Results:

    • Human and animal sera induced changes in Mytilus edulis ciliary metachrony.
    • Serum-induced alteration involved agglutination of cilia, increasing wavelength while beat frequency remained steady.
    • Adult bovine serum caused agglutination of rabbit tracheal cilia.
    • Serum dilution prolonged the onset of ciliary dyskinesia in both assays.
    • Fetal bovine and human cord sera did not induce dyskinesia or agglutination.
    • The effect is not specific to cystic fibrosis and appears mediated by serum immunoglobulins, potentially IgM.

    Conclusions:

    • A novel assay using Mytilus edulis cilia effectively demonstrates serum-induced ciliary dysfunction.
    • Ciliary agglutination and altered metachrony are induced by a variety of animal sera, not exclusively human sera.
    • The findings suggest a non-specific immune-mediated mechanism involving serum immunoglobulins, implicating IgM.

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