Assessment of paraoxonase activity and lipid peroxidation levels in diabetic and senile subjects suffering from cataract

被引:30
作者
Hashim, Zehra [1 ]
Zarina, Shamshad [1 ]
机构
[1] Univ Karachi, Dept Biochem, Karachi 75270, Pakistan
关键词
paraoxonase activity; senile cataract; diabetic cataract; oxidative stress; lipid peroxidation; malondialdehyde;
D O I
10.1016/j.clinbiochem.2007.03.015
中图分类号
R446 [实验室诊断]; R-33 [实验医学、医学实验];
学科分类号
1001 ;
摘要
Objectives: The purpose of this study was to evaluate antioxidant effect of paraoxonase I activity and malondialdehyde (NIDA) levels as a marker of oxidative stress in patients suffering from cataract due to diabetes and aging. Design and methods: One hundred cataract patients (senile and diabetic) and age- and sex-matched controls were studied. Paraoxonase 1 and arylesterase activities in plasma samples were measured using paraoxon and phenylacetate as substrates, respectively. The magnitude of lipid peroxidation was established by measuring plasma MDA and oxidized low-density lipoprotein (ox LDL) levels. One-way ANOVA was employed for analysis of results. Results: We observed significantly lower plasma paraoxonase and arylesterase activities in senile and diabetic cataractous patients as compared to respective controls (p < 0.001). Plasma MDA and ox LDL levels were found to be higher in patients suffering from cataract (P < 0.001). Conclusions: The results of present study suggest that the observed decrease in PON1 activity may be due to increase in oxidative stress. It can be concluded that lower paraoxonase activity could contribute to the higher risk of cataract formation. (c) 2007 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码:705 / 709
页数:5
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