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Yasuyuki Takai, Masaki Tanito, Akihiro Ohira; Multiplex Cytokine Analysis of Aqueous Humor in Eyes with Primary Open-Angle Glaucoma, Exfoliation Glaucoma, and Cataract. Invest. Ophthalmol. Vis. Sci. 2012;53(1):241-247. doi: https://doi.org/10.1167/iovs.11-8434.
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To measure levels of various inflammatory cytokines in the aqueous humor of patients with primary open-angle glaucoma (POAG), exfoliation glaucoma (EXG), and senile cataract.
Aqueous humor samples were obtained from 64 eyes of 64 Japanese subjects (POAG, 20 eyes; EXG, 23 eyes; and cataract, 21 control eyes). The levels of eight cytokines including interleukin (IL)1-β, IL-6, IL-8, transforming growth factor (TGF)-β1, tumor necrosis factor (TNF)-α, serum amyloid A (SAA), migration inhibitory factor (MIF), and vascular endothelial growth factor (VEGF)-A were estimated using the multiplex bead immunoassay technique.
Compared with the cataract group, the levels of TGF-β1, IL-8, and SAA were significantly higher in aqueous humor samples from the POAG (5.0-fold, 2.3-fold, and 11.9-fold, respectively) and EXG (12.5-fold, 4.0-fold, and 18.3-fold, respectively) groups. Except for a significant decrease in the IL-6 level in the POAG (0.23-fold) group, no other cytokine levels differed in the POAG and EXG groups compared with the cataract group. The levels of TGF-β1, IL-8, and SAA were positively correlated with each other (ρ = 0.723–0.786; P < 0.0001), the intraocular pressure (IOP) (ρ = 0.392–0.662; P < 0.0001–0.0019), and the number of glaucoma medications (ρ = 0.478–0.659; P < 0.0001–0.0001).
Cytokine networks including TGF-β1, IL-8, and SAA in aqueous humor may have critical roles in IOP elevations in patients with open-angle glaucoma.
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