Abstract
Purpose
To investigate the effect of L-ascorbic acid (LAA) on oxidative-stress-induced cellular senescence in trabecular meshwork (TM) cells.
Methods
Primarily cultured human TM cells were exposed to 0, 10, or 100 μM hydrogen peroxide for 7 days with or without co-exposure of LAA. Cellular survival and nitrite production were assessed with MTT and Griess assays, respectively. SA-β-gal staining was performed to quantify cellular senescence.
Results
Hydrogen peroxide decreased cellular survival, accompanied by decreased nitric oxide (NO) production. These decreases of cellular survival and NO production were abolished by co-exposure of 100 μM LAA. Analysis of SA-β-gal staining revealed that LAA inhibited hydrogen peroxide-induced cellular senescence by 6.8% (p < 0.05).
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