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Cochlear IgG in the C3H/lpr autoimmune strain mouse.

M L Wong1, J S Young, G Nilaver

  • 1Department of Otolaryngology-Head and Neck Surgery, Oregon Health Sciences University, Portland 97201-2997.

Hearing Research
|April 1, 1992
PubMed
Summary
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Systemic autoimmune disease in C3H/lpr mice leads to immunoglobulin G (IgG) deposition in the inner ear, affecting auditory function. This widespread IgG presence suggests indirect mechanisms rather than direct attacks on auditory structures.

Area of Science:

  • Immunology
  • Otolaryngology
  • Pathology

Background:

  • Autoimmune diseases can impact auditory function, but the specific mechanisms in the inner ear are not fully understood.
  • The C3H/lpr mouse model exhibits systemic autoimmunity and is used to study its effects on various organs.

Purpose of the Study:

  • To investigate the presence and distribution of immunoglobulin G (IgG) in the inner ear of autoimmune C3H/lpr mice.
  • To identify potential mechanisms by which systemic autoimmune disease affects auditory function.

Main Methods:

  • Immunohistochemical staining for IgG was performed on inner ear tissues from C3H/lpr mice before and after autoimmune disease onset.
  • Tissues were compared to age-matched nonautoimmune C3H/HeJ control mice.

Related Experiment Videos

Main Results:

  • IgG deposition was observed in the cochlear vessels, stria vascularis, and bony capsule of older C3H/lpr mice with autoimmune disease.
  • Less frequent IgG staining occurred in the geniculate ganglion, marrow cavities, tensor tympani muscle, and organ of Corti hair cells.
  • No IgG immunoreactivity was found in younger C3H/lpr mice or in any C3H/HeJ controls.

Conclusions:

  • Systemic autoimmune disease in C3H/lpr mice results in widespread IgG deposition within the inner ear, particularly in vascular structures.
  • The distribution of IgG suggests a generalized or indirect mechanism affecting auditory function, rather than a direct autoimmune attack on specific inner ear components.