Related Experiment Videos
Autoimmune disease and cochlear pathology in the C3H/lpr strain mouse
D R Trune1, J P Craven, J I Morton
1Department of Cell Biology and Anatomy, Oregon Health Sciences University, Portland 97201.
Hearing Research
|March 1, 1989
Summary
Systemic lupus erythematosus in C3H/lpr mice causes auditory damage. The stria vascularis degenerates early, leading to hearing loss, while hair cells remain intact.
Area of Science:
- Immunology
- Otolaryngology
- Pathology
Background:
- The C3H/lpr mouse strain spontaneously develops systemic lupus erythematosus (SLE).
- SLE is characterized by immune system dysregulation and autoantibody production.
- Auditory system involvement in SLE pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the correlation between systemic autoimmune disease progression and auditory system pathology in C3H/lpr mice.
- To identify the primary site of auditory damage in this lupus model.
Main Methods:
- Mice were monitored from 2-3 months to 10 months of age.
- Serum analysis for immune complexes, cryoglobulins, and antinuclear antibodies.
- Histological examination of inner ear structures, focusing on the stria vascularis.
- Auditory brainstem response (ABR) testing to assess hearing function.
Main Results:
- Autoimmune disease onset at 2-3 months correlated with stria vascularis degeneration, starting with edema and progressing basally.
- By 10 months, reduced stria vascularis area and elevated ABR thresholds were observed.
- No hair cell degeneration was detected at any age.
Conclusions:
- The stria vascularis is a primary target of autoimmune damage in the inner ear of C3H/lpr mice.
- Auditory dysfunction in this lupus model is linked to stria vascularis pathology, not hair cell loss.
- Findings suggest a potential mechanism for autoimmune-related hearing impairment.