A substrain of NZB mouse as an animal model of autoimmune inner ear disease.
A substrain of an autoimmune-prone mouse, NZB/kl, was found to show spontaneous elevation of the auditory brainstem response (ABR) threshold with age. Morphological examination of the inner ear in NZB/kl mice with high ABR thresholds revealed pathological changes confined to the stria vascularis, including marked thickening of the capillary basement membrane which contained many foamy structures, and vacuolar degeneration of the intermediate cells. Circular or granular IgM deposits and some IgG deposits were found in the stria vascularis in the mice with high ABR thresholds, suggesting that deposits of immune complexes (mainly IgM antibodies) could cause strial damage that resulted in the ABR threshold elevation. Another substrain of NZB mice, NZB/san, showed lower levels of IgM immune complexes and anti-ss DNA antibodies, and did not develop either inner ear morphological changes or a high ABR threshold. NZB/kl mice may provide a useful animal model for studying the mechanism of autoimmune inner ear disease.
Sone
M
M
Department of Otorhinolaryngology, School of Medicine, University of Nagoya, Japan.
Nariuchi
H
H
Saito
K
K
Yanagita
N
N
D000161:Acoustic Stimulation; D000818:Animals; D000936:Antigen-Antibody Complex / Q000097:blood*; D001309:Auditory Threshold / Q000502:physiology; D001327:Autoimmune Diseases / Q000209:etiology* / Q000276:immunology / Q000503:physiopathology; D001485:Basement Membrane / Q000473:pathology / Q000648:ultrastructure; D004277:DNA, Single-Stranded / Q000276:immunology; D004195:Disease Models, Animal; D004727:Endothelium / Q000648:ultrastructure; D004797:Enzyme-Linked Immunosorbent Assay; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D007074:Immunoglobulin G / Q000097:blood; D007075:Immunoglobulin M / Q000097:blood; D007150:Immunohistochemistry; D007759:Labyrinth Diseases / Q000209:etiology* / Q000276:immunology / Q000503:physiopathology; D008297:Male; D051379:Mice; D008814:Mice, Inbred NZB; D008854:Microscopy, Electron; D013316:Stria Vascularis / Q000473:pathology* / Q000648:ultrastructure
D000936:Antigen-Antibody Complex; D004277:DNA, Single-Stranded; D007074:Immunoglobulin G; D007075:Immunoglobulin M