Oxidative stress markers in patients with primary open-angle glaucoma.
OBJECTIVE
To investigate the levels of antioxidant enzymes catalase (CAT), glutathione peroxidase (GPO), superoxide dismutase (SOD), and malondialdehyde (MDA) in human eyes with primary open-angle glaucoma (POAG) and to correlate their concentrations with severity of glaucoma.


METHODS
A prospective cases control study.


METHODS
Thirty patients with primary open-angle glaucoma and twenty-five patients with senile cataracts of matched age and gender were included in the study prospectively. Aqueous humor samples were obtained by paracentesis at the time of elective surgery for glaucomatous and cataractous patients. Aqueous humor were analyzed for CAT, GPO, SOD, and MDA status.


RESULTS
GPO, SOD, and MDA enzyme levels revealed a high significant increase in aqueous humor of POAG patients with respect to the comparative group of cataract patients (P < 0.001). No significant difference in the activity of CAT enzyme in aqueous humor of POAG and cataract patient (P = 0.201). Significant correlation was found between the MDA enzyme level and severe visual field loss (P < 0.001) in POAG patients.


CONCLUSIONS
Increased levels of aqueous humor GPO, SOD, and MDA may be associated with POAG. In addition, they may be useful antioxidant enzyme levels in aqueous humor of POAG patients as a result of glaucoma disease and not a cause.
Ghanem
Asaad A
AA
Department of Ophthalmology, Faculty of Medicine, Mansoura University, Egypt. asaadghanem@hotmail.com
Arafa
Lamiaa F
LF
El-Baz
Ayman
A
D000328:Adult; D000975:Antioxidants; D001082:Aqueous Humor / Q000201:enzymology*; D015415:Biomarkers / Q000378:metabolism*; D016022:Case-Control Studies; D002374:Catalase / Q000378:metabolism; D002386:Cataract / Q000378:metabolism; D005260:Female; D005902:Glaucoma, Open-Angle / Q000201:enzymology*; D005979:Glutathione Peroxidase / Q000378:metabolism; D006801:Humans; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D008875:Middle Aged; D018384:Oxidative Stress; D011446:Prospective Studies; D013482:Superoxide Dismutase / Q000378:metabolism
D000975:Antioxidants; D015415:Biomarkers; D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase