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    Proper Evaluation of Factors Affecting Oxidative Status
    (Taylor & Francis Inc, 2016) Kilic, Rasit; Cumurcu, Tongabay; Sancaktar, Enver; Evliyaoglu, Osman; Sezer, Hafize
    [Abstract Not Available]
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    Systemic Prolidase Activity and Oxidative Stress in Keratoconus
    (Taylor & Francis Inc, 2016) Kilic, Rasit; Cumurcu, Tongabay; Sancaktar, Enver; Evliyaoglu, Osman; Sezer, Hafize
    Aim: Our aim was to evaluate the serum prolidase activity, total antioxidant capacity (TAC) and total oxidant status (TOS) in patients with keratoconus.Material and method: A total 69 keratoconus patients and 72 control subjects with similar age and gender were evaluated within the scope of this study. The keratoconus group was divided into four stages with the modified Krumeich classification. Serum prolidase activity, TAC and TOS were measured and compared between the patient and control groups.Results: The median serum prolidase enzyme activity value was 528.3 (684.1-416.7) U/L in the keratoconus group and 606.2 (812.9-482.3) U/L in the control group. The difference between the groups was statistically significant (p=0.027). The median TAC value was 1.24 (1.37-1.05) mmol/L in the keratoconus group and 1.29 (1.38-1.18) mmol/L in the control group. The median TOS value was 2 (4-1)mol/L in the keratoconus group and 3 (4-2)mol/L in the control group. There was no statistically significant difference between the two groups in terms of TAC or TOS (p=0.113 and p=0.366, respectively). There was a positive correlation between TAC and TOS in keratoconus group but not in the control group (r=0.670, p=0.001 and r=0.141, p=0.241, respectively). No significant relationship was seen between the keratoconus group stages and serum prolidase activity, TAS or TOS (p=0.894, p=0.155 and p=0.381, respectively).Conclusion: In conclusion, a significant relationship was found between decreased serum prolidase activity and keratoconus but there was no significant relationship between keratoconus and serum TAC or TOS.