벤잘코니움, 미토마이신 C, 덱사메타존이 섬유주세포의 스트레스에 미치는 영향

Effect of Benzalkonium, Mitomycin-C and Dexamethasone on Stress in Trabecular Meshwork Cells

Purpose: To investigate the effects of benzalkonium chloride (BAC), mitomycin C (MMC) and dexamethasone (DEX) on cellular stress in cultured human trabecular meshwork cell (HTMC) monolayers. Methods: HTMCs were cultured in the inner Transwell chamber until confluence and then were exposed to BAC, MMC or DEX for 6 hours. The carboxyfluorescein permeability through the HTMC monolayer was measured using a spectrofluorometer at 532 nm after 2 hours in the outer chamber. The 3-[4, 5 -dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide (MTT) assay was used to evaluate cellular viabilities. Results: The carboxyfluorescein permeability through the HTMC monolayer increased and cell survival decreased with 0.002% BAC (p < 0.05). Increased permeability without decreasing cell survival occurred with 0.05 μg/mL MMC. No effect on the permeability or cell survival was observed at 0.1 or 1.0 μm DEX (p > 0.05). Conclusions: BAC and MMC induced cellular toxicity and stress at lower concentrations but did not affect survival of cultured HTMCs. J Korean Ophthalmol Soc 2015;56(1):104-108