Oxidant/antioxidant balance in patients with thyroid cancer

Abstract

Purpose:To compare the antioxidant enzyme activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and the levels of lipid peroxidation product malondialdehyde (MDA) in blood samples of thyroid cancer patients compared to healthy controls. Methods: 43 control subjects (mean age 44±13 years) and 43 patients (43±13 years) presented with multinodular goiter whose fine needle aspiration revealed malignant cytology were included into this study. The SOD, MDA and GSH-Px activities were measured in control subjects, and before/20 days after thyroidectomy in thyroid cancer patients. Results: SOD activities of pre-thyroidectomy, post-thyroidectomy and control groups were not different (p>0.05). Before thyroidectomy GSH-Px activities were lower (p<0.05) and MDA levels were higher (p<0.05) than the control group. In post-thyroidectomy, GSH-Px activity (p<0.05) increased, and MDA levels (p<0.05) decreased compared to prethyroidectomy levels. After thyroidectomy GSH-Px activity was significantly higher than the control group (p<0.05). Although post-thyroidectomy MDA levels significantly decreased, they were still higher than the control group (p<0.05). Conclusion: The superoxide dismutase does not seem to change with thyroid cancer and thyroidectomy but both antioxidant glutathione peroxidase and lipid peroxidation product malondialdehyde do. These preliminary findings may point out oxidant/antioxidant imbalance associated with thyroid cancer.

Activation of Cardiac TNF-α in Altered Thyroid State-Induced Cardiometabolic Disorder

“…This also seems to be the first study to report the association between dysthyroidism-induced cardiometabolic disorders with cardiac redox status. Our observations were in consonance with the results of Torun et al 56 and Akinci et al 57 that documented a similar trend in the serum levels of MDA and catalase. Oxidative stress, which is characterized by an imbalance between free radicals and antioxidants in favour of radicals, participates in the pathogenesis of many diseases and their complications.…”

“…58,59 The levels of ROS are controlled by antioxidant enzymes, such as superoxide dismutase (SOD), glutathione peroxidase (GSH-Px). 60 Malondialdehyde (MDA) is a useful index for lipid peroxidation and thus used as an indicator for oxidative damage in cells and tissues. 59 The altered redox state seen in dysthyroidism possibly accounts for the activation of cardiac TNF-α with resultant cardio metabolic disorder.…”

Comparison of DNA Damage and Homocysteine Content in Blood of Thyroid Carcinoma Patients and Control Subjects in Punjab, Pakistan

“…Studies in the literature explain that in post thyroidectomy, serum MDA levels significantly decrease compared to prethyroidectomy levels but are still significantly higher than the control group's level (Akinci et al, 2008). Systemic oxidant/antioxidant status can be better understood or indicated by various levels of MDA or serum enzyme activities.…”

The Impact of Physical Processes and Chemicals of the Antioxidants (Bioactivity Compounds)

“…Plant extracts that have antioxidative properties is: rosemary, sage, thyme, oregano, ginger, cloves, laurel etc. [28] are active in decrease of oxidant impact. Antioxidant mixtures can be obtained from natural sources mixing with oil and pressing, or using extracts in CO 2 from antioxidants.…”