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이식된 표적항원인 Histone에 의해 유발된 면역매개성 내이장애
박경유,조진생,김준우,이관원,이창훈,KojiHozawa,TomonoriTakasaka 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.6
Background and Objectives:Histones, a set of highly cationic proteins esentially involved in the binding and packing of DNA in the cell nucleus chromatin, have five subclasses (H1, H2a, H2b, H3, H4) in mamalian animals. These components play the most important role in producing autoantibody in SLE and etc. Some studies proposed that there were a relationship betwen the activity of the disease and the titer of these autoantibody. Recently, histones were revealed to be involved in the immune deposit on GBM in MRL/lpr mice, and cause immune-mediated glomerulonephritis in normal animals. Materials :We examined IgG deposition on the basement membrane of strial capillaries and recorded the endocochlear potential from the basal turn by an electrode inserted though the round window in guinea pigs which was injected by histone (H2a) and anti-histone antisera. Results:IgG depositions were sen on the basement membrane of stria capillaries. IgG was also found to be accumulated on the extravascular side of the basement membrane. However, C3 was almost never observed in the stria vascularis of histone and the anti-histone antisera injected group. In these animals, intracellular edema was evi-The signifcant decrease in EP was observed just after the injection of anti-histone antisera in the animals receiving an intra-arterial injection of histones. Conclusion:This study indicated that cationic antigen could be trapped on the negatively charged basement membrane of strial capillaries, leading to the in situ immune complex formation, and eventually causing immune-mediated hearing loss. (Korean J Otolaryngol 2002;45:574-8)
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