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Open Access Gold möglich sobald Verlagsversion bei der ZB eingereicht worden ist.
Vitreal IgM autoantibodies target neurofilament medium in a spontaneous model of autoimmune uveitis.
Invest. Ophthalmol. Vis. Sci. 53, 294-300 (2012)
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. ( Invest Ophthalmol Vis Sci. 2012; 53:294-300) DOI:10.1167/iovs.11-8734
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
EQUINE RECURRENT UVEITIS; ELEVATED INTRAOCULAR-PRESSURE; CYTOSKELETON PROTEINS; AXONAL-TRANSPORT; TRIPLET PROTEINS; GANGLION-CELLS; ANTIBODIES; ANTIGENS; DISEASE; RETINA
ISSN (print) / ISBN
0146-0404
e-ISSN
1552-5783
Quellenangaben
Band: 53,
Heft: 1,
Seiten: 294-300
Verlag
Association for Research in Vision and Ophthalmology (ARVO)
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed
Institut(e)
CF Metabolomics & Proteomics (CF-MPC)