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Bone resorption in chronic otitis media.

J Maynard, R M Bumsted, C C Huang

    The Annals of Otology, Rhinology, and Laryngology
    |September 1, 1979
    PubMed
    Summary
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    Chronic otitis media causes bone destruction via enzymes like collagenase and acid phosphatase. Mononuclear inflammatory cells are identified as key players in this localized bone resorption process.

    Area of Science:

    • Otolaryngology
    • Cell Biology
    • Biochemistry

    Background:

    • Bone resorption is a key complication of chronic otitis media.
    • The chemical mediators and cellular origins of this bone destruction remain unclear.

    Purpose of the Study:

    • To localize collagenase and acid phosphatase in chronic otitis media.
    • To identify the cellular origin of these enzymes involved in bone resorption.

    Main Methods:

    • Immunohistochemistry and immunocytochemistry on guinea pig temporal bones and human ossicles.
    • Electron microscopy to examine enzyme location at the cellular level.

    Main Results:

    • Collagenase was found around mononuclear inflammatory cells and osteocyte lacunae.

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  • Acid phosphatase activity was abundant in the same cells showing collagenase staining.
  • These findings pinpoint mononuclear inflammatory cells as initiating bone resorption.

    • Conclusions:

    • Chronic otitis media activates bone destruction through mononuclear inflammatory cells.
    • These cells stimulate bone cells to increase destructive biochemical functions, leading to complications.