Abstract
The aim of our study was to compare klotho in the serum and aqueous humor of patients with primary open-angle glaucoma (POAG), pseudoexfoliation glaucoma (PEXG) and pseudoexfoliation syndrome (PEX). 18 POAG, 20 PEXG, 19 PEX and 20 control patients were included in our study. Aqueous humor and serum samples were collected at the time of cataract surgery. Samples were collected using enzyme-linked immunosorbent assay to evaluate the levels of Klotho protein. Klotho levels in the serum and aqueous humor of PEXG patients (34.45 ± 3.59, 0.20 ± 0.15ng/ml), PEX (35.85 ± 4.26, 0.23 ± 0.20ng/ml) patients and POAG patients (35.99 ± 3.73, 0.25 ± 0.20ng/ml) were significantly lower than control group (40.14 ± 3.85, 0.53 ± 0.39ng/ml) (PEXG, P < 0.001, P < 0.001; PEX, P = 0.002, P = 0.003; POAG, P = 0.006, P = 0.003, respectively). Both serum and aqueous levels of klotho in the PEXG and PEX patients were lower than POAG patients, but the difference did not reach statistical significance (PEXG & POAG P = 0.149, P = 0.696), (PEX & POAG P = 0.845, P = 0.775). Klotho levels in the serum and aqueous humor decreased in PEX, PEXG and POAG groups compared to control group, but the reduction was most significant in PEXG group.
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