Protein macroarray profiling of serum autoantibodies in pseudoexfoliation glaucoma

Investigative Ophthalmology & Visual Science
Edward W DervanDerek Murphy

Abstract

Complex repertoires of IgG autoantibodies have been detected against ocular antigens in patients with glaucoma. The goal was to identify and characterize the IgG autoantibody repertoires in sera of patients with pseudoexfoliation glaucoma (PXFG) with protein macroarrays. Serum samples of 21 patients with PXFG and 19 age- and sex-matched control subjects were profiled on high-density colony protein macroarrays expressing His-tagged recombinant human proteins derived from a human fetal brain cDNA library. Statistically prevalent expression clones in the PXFG group were sequenced. mRNA expression of identified antigens was examined in the rat ganglion cell line RGC-5 and in human brain and optic nerve cDNA. The IgG immunoreactivity of the sera of 20 control and 26 PXFG patients to purified C6orf129 was analyzed in a reverse enzyme-linked immunosorbent assay. An increased prevalence was detected among the PXFG patients of serum antibodies to seven proteins: C6orf129; stathmin-like 4; transmembrane protein 9 domain family, member B; fibroblast growth factor receptor 3; cleft lip and palate transmembrane protein 1; EH-domain-containing protein 1; and eukaryotic translation elongation factor 2. All antigens were expressed in the RGC-5...Continue Reading

Citations

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