Abstract
Background
Uveitis is an intraocular inflammatory disease in which autoimmune reactions have been discussed in playing an important role. Many data in this respect derived from the animal model of “experimental autoimmune uveitis”, where several organ-specific autoantigens have been described such as the retinal S-antigen and the interphotoreceptor retinoid-binding protein. However, their diagnostic and pathogenic role in humans has been controversially discussed. In recent studies, the possible relevance of βB1-crystallin, present in lens and ciliary body, has been outlined. We, therefore, wanted to analyse whether sera from patients with uveitis might contain antibodies to lens proteins
Methods
Human lenses from cadaveric eyes were shock frozen, homogenized, and resuspended. The resulting suspension (human lens protein fraction - HLPF) was analyzed for antigenicity by ELISA and Western blotting with patients’ sera. A total of 165 patients with uveitis, 54 patients with scleritis and episcleritis, 56 patients with other eye diseases, and 112 healthy blood donors were studied.
Results
Twenty-six (49%) of the 53 patients with anterior uveitis, 17 (32%) of the 53 patients with intermediate uveitis and 7 (22%) of 32 patients with posterior uveitis reacted in the ELISA with the HLPF. Antibodies to lens antigens were detected in one-third of patients with panuveitis and retinal vasculitis. In contrast, only 12% of the healthy blood donors were positive in the ELISA. The number of patients with an autoimmune response to α-crystallins in Western blot predominated in all investigated groups.
Conclusions
These data indicate that antibodies to lens proteins occur in a high incidence in sera from patients with uveitis. Forty-nine percent of the patients with anterior uveitis and only 12% of healthy controls were positive in the ELISA. In our groups of patients and controls the autoantibodies reacted in the Western blot predominantly with α-crystallin. Further studies are required to analyze in more detail the clinical and etiopathogenetic relevance of the antilens antibodies in uveitis.
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D. Doycheva was supported by a grant from Alexander von Humboldt Foundation. B. Preuss was supported by the Deutsche Forschungsgemeinschaft (GRK 794).
An erratum to this article can be found at http://dx.doi.org/10.1007/s00417-007-0539-z
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Deshka, D., Beate, P., Reinhild, K. et al. High incidence of antibodies to lens proteins in sera from patients with uveitis. Graefe's Arch Clin Exp Ophthalmol 245, 683–688 (2007). https://doi.org/10.1007/s00417-006-0407-2
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DOI: https://doi.org/10.1007/s00417-006-0407-2