Abstract：
PURPOSE:Although the presence of IgG autoantibodies in the vitreous of spontaneous cases of equine recurrent uveitis (ERU) has been demonstrated, the potential role of IgM reactivities during ERU pathogenesis remains unexplored. The purpose of this study was to examine the presence of IgM autoantibodies in vitreous specimens of ERU-affected horses and to test their binding specificity to intraocularly expressed proteins. METHODS:To test IgM autoantibody responses to retinal tissue, vitreous samples of eye-healthy controls and ERU patients were analyzed via two-dimensional Western blot analysis with equine retinal tissue as an antigen source. A candidate protein, the peptide neurofilament medium (NF-M), was identified via mass spectrometry and validated via enzyme-linked immunosorbent assay. Immunohistochemistry for NF-M expression was performed on healthy and ERU-affected retinal sections. RESULTS:Whereas autoreactivity was never detected in the healthy vitreous samples, NF-M was specifically targeted by vitreal IgM autoantibodies in 44% of the ERU cases. Vitreal anti-NF-M IgG was detected in only 8% of the ERU samples, pointing to a persistent IgM response. In healthy horse retina, NF-M was located in the retinal ganglion cells and their processes, with additional staining in the outer plexiform layer. NF-M expression in ERU-affected retinas decreased considerably, and the remaining expression was limited to the nerve fiber layer. CONCLUSIONS:Intraocular anti NF-M IgM autoantibodies occur with high prevalence in vitreous of spontaneous autoimmune uveitis cases. The IgM dominated response may indicate a thymus-independent response to NF-M and merits further investigation in ERU, as well as in its human counterpart, autoimmune uveitis.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Swadzba ME,Hirmer S,Amann B,Hauck SM,Deeg CAdoi
10.1167/iovs.11-8734subject
Has Abstractpub_date
2012-01-25 00:00:00pages
294-300issue
1eissn
0146-0404issn
1552-5783pii
iovs.11-8734journal_volume
53pub_type
杂志文章abstract：PURPOSE:The association of age and blood pressure (BP) with retinal vessel change is widely reported, with inverse relationships between retinal arteriolar and venular diameter and increasing age and elevated BP. No previous studies have dissected the separate effects of age and BP on the diameter of retinal vessels. ...
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journal_title：Investigative ophthalmology & visual science
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doi：
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