4.5 Article

Oxidized LDL, serum oxidizability and serum lipid levels in patients with breast or ovarian cancer

Journal

CLINICAL BIOCHEMISTRY
Volume 40, Issue 15, Pages 1129-1134

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.clinbiochem.2007.06.007

Keywords

oxidized LDL; serum oxidizability; LDL; breast cancer; ovarian cancer

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Objectives: The aim of this study was to evaluate the extent of oxidative stress in patients with breast or ovarian cancer by analyzing the magnitude of serum oxidizability and the involvement of oxidized low-density lipoproteins (oxLDL) in the disease. Design and methods: The study was conducted on 32 patients diagnosed with breast or ovarian cancer but who had not undergone any kind of treatment and 30 healthy individuals of similar age. The evaluation of oxidative stress was assessed by: (a) the ex-vivo susceptibility of serum lipids to oxidation and (b) the detection of oxLDL and anti-oxLDL autoantibodies. Total cholesterol, LDL-cholesterol and HDL-cholesterol were co-estimated. Results: The results indicated that the levels of oxLDL were increased among both breast and ovarian cancer patients as compared to the control subjects. Additionally in patients with breast cancer, serum total cholesterol, LDL-cholesterol, anti-oxLDL antibodies and the maximal rate of diene formation (RA), the index of oxidizable components load, were increased in comparison to controls. There is statistically significant evidence that serum oxLDL levels are associated with increased risk of breast and ovarian cancer. Conclusions: The findings exhibit a correlation between oxLDL and malignancy, supporting the contribution of oxidative stress to carcinogenesis and the possible involvement of oxLDL in the process of malignancy. The clinical evaluation of the oxLDL measurement is under investigation. (c) 2007 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.

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